- DPX image encoder
- SMPTE 302M AES3 audio decoder
- ffmpeg no longer quits after the 'q' key is pressed; use 'ctrl+c' instead
-- 9bit and 10bit per sample support in the H.264 decoder
+- 9 bits and 10 bits per sample support in the H.264 decoder
version 0.7_beta1:
- rate distorted optimal lambda->qp support
- AAC encoding with libfaac
- Sunplus JPEG codec (SP5X) support
-- use Lagrange multipler instead of QP for ratecontrol
+- use Lagrange multiplier instead of QP for ratecontrol
- Theora/VP3 decoding support
- XA and ADX ADPCM codecs
- export MPEG-2 active display area / pan scan
/*
* avconv main
- * Copyright (c) 2000-2011 The libav developers.
+ * Copyright (c) 2000-2011 The Libav developers
*
* This file is part of Libav.
*
return 0;
av_get_channel_layout_string(layout_name, sizeof(layout_name),
dec->channels, dec->channel_layout);
- av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for Input Stream "
+ av_log(NULL, AV_LOG_WARNING, "Guessed Channel Layout for Input Stream "
"#%d.%d : %s\n", ist->file_index, ist->st->index, layout_name);
}
return 1;
for (i = 0; i < ost->nb_bitstream_filters; i++) {
ret = av_bsf_alloc(ost->bitstream_filters[i], &ctx);
if (ret < 0) {
- av_log(NULL, AV_LOG_ERROR, "Error allocating a bistream filter context\n");
+ av_log(NULL, AV_LOG_ERROR, "Error allocating a bitstream filter context\n");
return ret;
}
ost->bsf_ctx[i] = ctx;
ret = av_bsf_init(ctx);
if (ret < 0) {
- av_log(NULL, AV_LOG_ERROR, "Error initializing bistream filter: %s\n",
+ av_log(NULL, AV_LOG_ERROR, "Error initializing bitstream filter: %s\n",
ost->bitstream_filters[i]->name);
return ret;
}
ic->flags |= AVFMT_FLAG_NONBLOCK;
ic->interrupt_callback = int_cb;
- /* open the input file with generic libav function */
+ /* open the input file with generic Libav function */
err = avformat_open_input(&ic, filename, file_iformat, &o->g->format_opts);
if (err < 0) {
print_error(filename, err);
}
/* update video clock for next frame */
frame_delay = av_q2d(is->video_dec->time_base);
- /* for MPEG2, the frame can be repeated, so we update the
+ /* For MPEG-2, the frame can be repeated, so we update the
clock accordingly */
frame_delay += src_frame->repeat_pict * (frame_delay * 0.5);
is->video_clock += frame_delay;
/* init averaging filter */
is->audio_diff_avg_coef = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
is->audio_diff_avg_count = 0;
- /* since we do not have a precise anough audio fifo fullness,
+ /* since we do not have a precise enough audio FIFO fullness,
we correct audio sync only if larger than this threshold */
is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / avctx->sample_rate;
/* globals */
static const OptionDef *options;
-/* AVprobe context */
+/* avprobe context */
static const char *input_filename;
static AVInputFormat *iformat = NULL;
2016-xx-xx - xxxxxxx - lavc 57.15.0 - avcodec.h
Add a new bitstream filtering API working with AVPackets.
- Deprecate the old bistream filtering API.
+ Deprecate the old bitstream filtering API.
2016-xx-xx - xxxxxxx - lavfi 6.3.0 - avfilter.h
Add AVFilterContext.hw_device_ctx.
2013-08-05 - f824535 - lavc 55.13.0 - avcodec.h
Deprecate the bitstream-related members from struct AVVDPAUContext.
- The bistream buffers no longer need to be explicitly freed.
+ The bitstream buffers no longer need to be explicitly freed.
2013-08-05 - 549294f - lavc 55.12.0 - avcodec.h
Deprecate the CODEC_CAP_HWACCEL_VDPAU codec capability. Use CODEC_CAP_HWACCEL
* base -- is now stored in AVBufferRef
* reference, type, buffer_hints -- are unnecessary in the new API
* hwaccel_picture_private, owner, thread_opaque -- should not
- have been acessed from outside of lavc
+ have been accessed from outside of lavc
* qscale_table, qstride, qscale_type, mbskip_table, motion_val,
mb_type, dct_coeff, ref_index -- mpegvideo-specific tables,
which are not exported anymore.
If this option is not specified, the default adapter is used.
@item qsv
-For QSV, this option corresponds to the valus of MFX_IMPL_* . Allowed values
+For QSV, this option corresponds to the values of MFX_IMPL_* . Allowed values
are:
@table @option
@item auto
@end example
@item -bsf[:@var{stream_specifier}] @var{bitstream_filters} (@emph{output,per-stream})
-Set bitstream filters for matching streams. @var{bistream_filters} is
+Set bitstream filters for matching streams. @var{bitstream_filters} is
a comma-separated list of bitstream filters. Use the @code{-bsfs} option
to get the list of bitstream filters.
@example
@chapter Description
@c man begin DESCRIPTION
-AVplay is a very simple and portable media player using the Libav
+avplay is a very simple and portable media player using the Libav
libraries and the SDL library. It is mostly used as a testbed for the
various Libav APIs.
@c man end
@ignore
@setfilename avplay
-@settitle AVplay media player
+@settitle avplay media player
@c man begin SEEALSO
avconv(1), avprobe(1) and the Libav HTML documentation
A stream specifier is a string generally appended to the option name and
separated from it by a colon. E.g. @code{-codec:a:1 ac3} option contains
-@code{a:1} stream specifer, which matches the second audio stream. Therefore it
+@code{a:1} stream specifier, which matches the second audio stream. Therefore it
would select the ac3 codec for the second audio stream.
A stream specifier can match several stream, the option is then applied to all
rational.c code to perform exact calculations with rational numbers
tree.c generic AVL tree
crc.c generic CRC checksumming code
-integer.c 128bit integer math
+integer.c 128-bit integer math
lls.c
mathematics.c greatest common divisor, integer sqrt, integer log2, ...
mem.c memory allocation routines with guaranteed alignment
audio or video streams.
@end itemize
-@section Integrating libav in your program
+@section Integrating Libav in your program
Shared libraries should be used whenever is possible in order to reduce
the effort distributors have to pour to support programs and to ensure
If the code changed has already a test present in FATE you should run it,
otherwise it is advised to add it.
-Improvements to codec or demuxer might change the FATE results. Make sure
+Improvements to a codec or demuxer might change the FATE results. Make sure
to commit the update reference with the change and to explain in the comment
why the expected result changed.
@subsection Speed considerations
In the default mode of operation the encoder has to honor frame constraints
-(i.e. not produc frames with size bigger than requested) while still making
-output picture as good as possible.
+(i.e. not produce frames with a size larger than requested) while still making
+the output picture as good as possible.
A frame containing a lot of small details is harder to compress and the encoder
would spend more time searching for appropriate quantizers for each slice.
* libavcodec API use example.
*
* @example avcodec.c
- * Note that this library only handles codecs (mpeg, mpeg4, etc...),
- * not file formats (avi, vob, etc...). See library 'libavformat' for the
- * format handling
+ * Note that this library only handles codecs (MPEG, MPEG-4, etc...),
+ * not file formats (AVI, VOB, etc...). See library 'libavformat' for the
+ * format handling.
*/
#include <stdlib.h>
printf("Audio decoding\n");
- /* find the mpeg audio decoder */
+ /* find the MPEG audio decoder */
codec = avcodec_find_decoder(AV_CODEC_ID_MP2);
if (!codec) {
fprintf(stderr, "codec not found\n");
printf("Video encoding\n");
- /* find the mpeg1 video encoder */
+ /* find the mpeg1video encoder */
codec = avcodec_find_encoder(AV_CODEC_ID_MPEG1VIDEO);
if (!codec) {
fprintf(stderr, "codec not found\n");
}
}
- /* add sequence end code to have a real mpeg file */
+ /* add sequence end code to have a real MPEG file */
fwrite(endcode, 1, sizeof(endcode), f);
fclose(f);
av_init_packet(&avpkt);
- /* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */
+ /* set end of buffer to 0 (this ensures that no overreading happens for damaged MPEG streams) */
memset(inbuf + INBUF_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
printf("Video decoding\n");
- /* find the mpeg1 video decoder */
+ /* find the MPEG-1 video decoder */
codec = avcodec_find_decoder(AV_CODEC_ID_MPEG1VIDEO);
if (!codec) {
fprintf(stderr, "codec not found\n");
}
}
- /* some codecs, such as MPEG, transmit the I and P frame with a
+ /* Some codecs, such as MPEG, transmit the I- and P-frame with a
latency of one frame. You must do the following to have a
- chance to get the last frame of the video */
+ chance to get the last frame of the video. */
avpkt.data = NULL;
avpkt.size = 0;
len = avcodec_decode_video2(c, picture, &got_picture, &avpkt);
c->gop_size = 12; /* emit one intra frame every twelve frames at most */
c->pix_fmt = STREAM_PIX_FMT;
if (c->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
- /* just for testing, we also add B frames */
+ /* just for testing, we also add B-frames */
c->max_b_frames = 2;
}
if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
@chapter Introduction
-FATE provides a regression testsuite embedded within the Libav build system.
+FATE provides a regression test suite embedded within the Libav build system.
It can be run locally and optionally configured to send reports to a web
aggregator and viewer @url{http://fate.libav.org}.
In order to run, FATE needs a large amount of data (samples and references)
that is provided separately from the actual source distribution.
-To inform the build system about the testsuite location, pass
+To inform the build system about the test suite location, pass
@option{--samples=<path to the samples>} to @command{configure} or set the
@var{SAMPLES} Make variable or the @var{LIBAV_SAMPLES} environment variable
to a suitable value.
List all fate/regression test targets.
@item fate-rsync
-Shortcut to download the fate test samples to the specified testsuite location.
+Shortcut to download the fate test samples to the specified test suite location.
@item fate
Run the FATE test suite (requires the fate-suite dataset).
@section gradfun
Fix the banding artifacts that are sometimes introduced into nearly flat
-regions by truncation to 8bit colordepth.
+regions by truncation to 8-bit colordepth.
Interpolate the gradients that should go where the bands are, and
dither them.
Overlay one video on top of another.
It takes two inputs and has one output. The first input is the "main"
-video on which the second input is overlayed.
+video on which the second input is overlaid.
It accepts the following parameters:
# Select only frames contained in the 10-20 time interval
select='gte(t\,10)*lte(t\,20)'
-# Select only I frames contained in the 10-20 time interval
+# Select only I-frames contained in the 10-20 time interval
select='gte(t\,10)*lte(t\,20)*eq(pict_type\,I)'
# Select frames with a minimum distance of 10 seconds
The following graph description will generate a red source
with an opacity of 0.2, with size "qcif" and a frame rate of 10
-frames per second, which will be overlayed over the source connected
+frames per second, which will be overlaid over the source connected
to the pad with identifier "in":
@example
An example:
@example
# Generate a frei0r partik0l source with size 200x200 and framerate 10
-# which is overlayed on the overlay filter main input
+# which is overlaid on the overlay filter's main input
frei0r_src=size=200x200:framerate=10:filter_name=partik0l:filter_params=1234 [overlay]; [in][overlay] overlay
@end example
changes may have thrown off the results of your testing.
@end itemize
-Next let the code pass through a full run of our testsuite. Before you do,
+Next let the code pass through a full run of our test suite. Before you do,
the command @command{make fate-rsync} will update the test samples. Changes
to the samples set are not very common and commits depending on samples
changes are delayed for at least 24 hours to allow the new samples to
-grab_x @var{x_offset} -grab_y @var{y_offset}
@end example
-Set the grabing region coordinates. The are expressed as offset from the top left
+Set the grabbing region coordinates. The are expressed as offset from the top left
corner of the X11 window. The default value is 0.
@c man end INPUT DEVICES
The BROADCAST variant provides a secondary time reference to facilitate
detecting endpoint latency and network delays.
-It assumes all the endpoint clocks are syncronized.
+It assumes all the endpoint clocks are synchronized.
To be used in real-time scenarios.
@section PIPE
then take a look in the x86/ directory, as most important functions are
already optimized for MMX.
-If you want to do x86 optimizations then you can either try to finetune the
+If you want to do x86 optimizations then you can either try to fine-tune the
stuff in the x86 directory or find some other functions in the C source to
optimize, but there aren't many left.
particularly important on Win64, where xmm6-15 are callee-save, and not
restoring their contents leads to undefined results. In external asm (e.g.
yasm), you do this by using:
-cglobal functon_name, num_args, num_regs, num_xmm_regs
+cglobal function_name, num_args, num_regs, num_xmm_regs
In inline asm, you specify clobbered registers at the end of your asm:
__asm__(".." ::: "%eax").
If gcc is not set to support sse (-msse) it will not accept xmm registers
@section Darwin (OS X, iPhone)
The toolchain provided with Xcode is sufficient to build the basic
-unacelerated code.
+unaccelerated code.
OS X on PowerPC or ARM (iPhone) requires a preprocessor from
@url{git://git.libav.org/gas-preprocessor.git} to build the optimized
pacman -S mingw-w64-x86_64-yasm mingw-w64-x86_64-gcc mingw-w64-x86_64-SDL
@end example
-To target 32bit replace the @code{x86_64} with @code{i686} in the command above.
+To target 32 bits replace @code{x86_64} with @code{i686} in the command above.
@section Microsoft Visual C++ or Intel C++ Compiler for Windows
/ \
special converter [Input to YUV converter]
| |
- | (8bit YUV 4:4:4 / 4:2:2 / 4:2:0 / 4:0:0 )
+ | (8-bit YUV 4:4:4 / 4:2:2 / 4:2:0 / 4:0:0 )
| |
| v
| Horizontal scaler
| |
- | (15bit YUV 4:4:4 / 4:2:2 / 4:2:0 / 4:1:1 / 4:0:0 )
+ | (15-bit YUV 4:4:4 / 4:2:2 / 4:2:0 / 4:1:1 / 4:0:0 )
| |
| v
| Vertical scaler and output converter
-This is a quick description of the viterbi aka dynamic programing
-algorthm.
+This is a quick description of the Viterbi aka dynamic programming
+algorithm.
-Its reason for existence is that wikipedia has become very poor on
+Its reason for existence is that Wikipedia has become very poor on
describing algorithms in a way that makes it useable for understanding
them or anything else actually. It tends now to describe the very same
algorithm under 50 different names and pages with few understandable
Our goal is to find a path from left to right through it which
minimizes the sum of the score of all edges.
(and of course left/right is just a convention here it could be top down too)
-Similarly the minimum could be the maximum by just fliping the sign,
+Similarly the minimum could be the maximum by just flipping the sign,
Example of a path with scores:
O O O O O O O
O O O O O O-1-O---> (sum here is 24)
-The viterbi algorthm now solves this simply column by column
+The Viterbi algorithm now solves this simply column by column
For the previous column each point has a best path and a associated
score:
O 0 4
-the viterbi algorthm continues exactly like this column for column until the
+the Viterbi algorithm continues exactly like this column for column until the
end and then just picks the path with the best score (above that would be the
one with score 3)
-Author: Michael niedermayer
+Author: Michael Niedermayer
Copyright LGPL
avpriv_request_sample(ac->avctx, "SSR");
return AVERROR_PATCHWELCOME;
}
- // I see no textual basis in the spec for this occuring after SSR gain
- // control, but this is what both reference and real implmentations do
+ // I see no textual basis in the spec for this occurring after SSR gain
+ // control, but this is what both reference and real implementations do
if (tns->present && er_syntax)
if (decode_tns(ac, tns, gb, ics) < 0)
return AVERROR_INVALIDDATA;
struct LATMContext {
AACContext aac_ctx; ///< containing AACContext
- int initialized; ///< initilized after a valid extradata was seen
+ int initialized; ///< initialized after a valid extradata was seen
// parser data
int audio_mux_version_A; ///< LATM syntax version
/** Places SBR in pure upsampling mode. */
static void sbr_turnoff(SpectralBandReplication *sbr) {
sbr->start = 0;
- // Init defults used in pure upsampling mode
+ // Init defaults used in pure upsampling mode
sbr->kx[1] = 32; //Typo in spec, kx' inits to 32
sbr->m[1] = 0;
// Reset values for first SBR header
sub x10, x10, #4<<2
b.gt 1b
-// comuting samples[16]
+// computing samples[16]
add x6, x1, #32<<2
ld1 {v0.2s}, [x6], x9
ld1 {v1.2s}, [x0], x9
/*
* Autodesk RLE Decoder
- * Copyright (C) 2005 the ffmpeg project
+ * Copyright (C) 2005 The FFmpeg project
*
* This file is part of Libav.
*
/*
- * Copyright (c) 2001-2003 The ffmpeg Project
+ * Copyright (c) 2001-2003 The FFmpeg project
*
* first version by Francois Revol (revol@free.fr)
* fringe ADPCM codecs (e.g., DK3, DK4, Westwood)
/*
- * Copyright (c) 2001-2003 The ffmpeg Project
+ * Copyright (c) 2001-2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
- * Copyright (c) 2001-2003 The ffmpeg Project
+ * Copyright (c) 2001-2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
- * Copyright (c) 2001-2003 The ffmpeg Project
+ * Copyright (c) 2001-2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
- * Copyright (c) 2001-2003 The ffmpeg Project
+ * Copyright (c) 2001-2003 The FFmpeg project
*
* first version by Francois Revol (revol@free.fr)
* fringe ADPCM codecs (e.g., DK3, DK4, Westwood)
* passed through the extradata[_size] fields. This atom is tacked onto
* the end of an 'alac' stsd atom and has the following format:
*
- * 32bit atom size
- * 32bit tag ("alac")
- * 32bit tag version (0)
- * 32bit samples per frame (used when not set explicitly in the frames)
- * 8bit compatible version (0)
- * 8bit sample size
- * 8bit history mult (40)
- * 8bit initial history (14)
- * 8bit rice param limit (10)
- * 8bit channels
- * 16bit maxRun (255)
- * 32bit max coded frame size (0 means unknown)
- * 32bit average bitrate (0 means unknown)
- * 32bit samplerate
+ * 32 bits atom size
+ * 32 bits tag ("alac")
+ * 32 bits tag version (0)
+ * 32 bits samples per frame (used when not set explicitly in the frames)
+ * 8 bits compatible version (0)
+ * 8 bits sample size
+ * 8 bits history mult (40)
+ * 8 bits initial history (14)
+ * 8 bits rice param limit (10)
+ * 8 bits channels
+ * 16 bits maxRun (255)
+ * 32 bits max coded frame size (0 means unknown)
+ * 32 bits average bitrate (0 means unknown)
+ * 32 bits samplerate
*/
#include <inttypes.h>
skip_bits_long(&gb, 32); // sample rate already known
sconf->samples = get_bits_long(&gb, 32);
avctx->channels = m4ac.channels;
- skip_bits(&gb, 16); // number of channels already knwon
+ skip_bits(&gb, 16); // number of channels already known
skip_bits(&gb, 3); // skip file_type
sconf->resolution = get_bits(&gb, 3);
sconf->floating = get_bits1(&gb);
* @param p the context
* @param subframe unpacked amr subframe
* @param mode mode of the current frame
- * @param fixed_sparse sparse respresentation of the fixed vector
+ * @param fixed_sparse sparse representation of the fixed vector
*/
static void pitch_sharpening(AMRContext *p, int subframe, enum Mode mode,
AMRFixed *fixed_sparse)
{
// The spec suggests the current pitch gain is always used, but in other
- // modes the pitch and codebook gains are joinly quantized (sec 5.8.2)
+ // modes the pitch and codebook gains are jointly quantized (sec 5.8.2)
// so the codebook gain cannot depend on the quantized pitch gain.
if (mode == MODE_12k2)
p->beta = FFMIN(p->pitch_gain[4], 1.0);
#define MIN_ISF_SPACING (128.0 / 32768.0) ///< minimum isf gap
#define PRED_FACTOR (1.0 / 3.0)
-#define MIN_ENERGY -14.0 ///< initial innnovation energy (dB)
+#define MIN_ENERGY -14.0 ///< initial innovation energy (dB)
#define ENERGY_MEAN 30.0 ///< mean innovation energy (dB) in all modes
#define PREEMPH_FAC 0.68 ///< factor used to de-emphasize synthesis
s->y = s->nb_args > 0 ? av_clip((s->args[0] - 1)*s->font_height, 0, avctx->height - s->font_height) : 0;
s->x = s->nb_args > 1 ? av_clip((s->args[1] - 1)*FONT_WIDTH, 0, avctx->width - FONT_WIDTH) : 0;
break;
- case 'h': //set creen mode
+ case 'h': //set screen mode
case 'l': //reset screen mode
if (s->nb_args < 2)
s->args[0] = DEFAULT_SCREEN_MODE;
}
/**
- * Calculate culmulative frequency for next symbol. Does NO update!
+ * Calculate cumulative frequency for next symbol. Does NO update!
* @param ctx decoder context
* @param tot_f is the total frequency or (code_value)1<<shift
- * @return the culmulative frequency
+ * @return the cumulative frequency
*/
static inline int range_decode_culfreq(APEContext *ctx, int tot_f)
{
DAT4 .req v5
DAT5 .req v6
DAT6 .req sl // use these rather than the otherwise unused
-DAT7 .req fp // ip and lr so that we can load them usinf LDRD
+DAT7 .req fp // ip and lr so that we can load them using LDRD
.macro output4words tail, head, r0, r1, r2, r3, r4, r5, r6, r7, pointer_dead=0
.if \head
#ifdef ENABLE_ARM_TESTS
/**
- * h263 dequantizer supplementary function, it is performance critical and needs to
+ * H.263 dequantizer supplementary function, it is performance critical and needs to
* have optimized implementations for each architecture. Is also used as a reference
* implementation in regression tests
*/
__row_loop:
- @@ read the row and check if it is null, almost null, or not, according to strongarm specs, it is not necessary to optimize ldr accesses (i.e. split 32bits in 2 16bits words), at least it gives more usable registers :)
+ @@ read the row and check if it is null, almost null, or not, according to strongarm specs, it is not necessary to optimize ldr accesses (i.e. split 32 bits in two 16-bit words), at least it gives more usable registers :)
ldr r1, [r14, #0] @ R1=(int32)(R12)[0]=ROWr32[0] (relative row cast to a 32b pointer)
ldr r2, [r14, #4] @ R2=(int32)(R12)[1]=ROWr32[1]
ldr r3, [r14, #8] @ R3=ROWr32[2]
@@ row[7] = (a0 - b0) >> ROW_SHIFT;
add r8, r6, r0 @ R8=a0+b0
add r9, r2, r1 @ R9=a1+b1
- @@ put 2 16 bits half-words in a 32bits word
- @@ ROWr32[0]=ROWr16[0] | (ROWr16[1]<<16) (only Little Endian compliant then!!!)
+ @@ put two 16-bit half-words in a 32-bit word
+ @@ ROWr32[0]=ROWr16[0] | (ROWr16[1]<<16) (only little-endian compliant then!!!)
ldr r10, =MASK_MSHW @ R10=0xFFFF0000
and r9, r10, r9, lsl #ROW_SHIFT2MSHW @ R9=0xFFFF0000 & ((a1+b1)<<5)
mvn r11, r10 @ R11= NOT R10= 0x0000FFFF
vmov.i16 q12, #3
vsubl.s8 q10, d8, d6 @ QS0 - PS0
- vsubl.s8 q11, d9, d7 @ (widened to 16bit)
+ vsubl.s8 q11, d9, d7 @ (widened to 16 bits)
veor q2, q2, q13 @ PS1 = P1 ^ 0x80
veor q5, q5, q13 @ QS1 = Q1 ^ 0x80
vmul.i16 q10, q10, q12 @ w = 3 * (QS0 - PS0)
/*
- * SSA/ASS common funtions
+ * SSA/ASS common functions
* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
*
* This file is part of Libav.
/*
- * SSA/ASS common funtions
+ * SSA/ASS common functions
* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
*
* This file is part of Libav.
*/
static const uint8_t specs_per_bfu[52] = {
8, 8, 8, 8, 4, 4, 4, 4, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, // low band
- 6, 6, 6, 6, 7, 7, 7, 7, 9, 9, 9, 9, 10, 10, 10, 10, // midle band
+ 6, 6, 6, 6, 7, 7, 7, 7, 9, 9, 9, 9, 10, 10, 10, 10, // middle band
12, 12, 12, 12, 12, 12, 12, 12, 20, 20, 20, 20, 20, 20, 20, 20 // high band
};
* Use only bitexact stuff (except (I)DCT).
*/
#define AV_CODEC_FLAG_BITEXACT (1 << 23)
-/* Fx : Flag for h263+ extra options */
+/* Fx : Flag for H.263+ extra options */
/**
* H.263 advanced intra coding / MPEG-4 AC prediction
*/
* are connected to a parser to split what they return into proper frames.
* This flag is reserved to the very rare category of codecs which have a
* bitstream that cannot be split into frames without timeconsuming
- * operations like full decoding. Demuxers carring such bitstreams thus
+ * operations like full decoding. Demuxers carrying such bitstreams thus
* may return multiple frames in a packet. This has many disadvantages like
* prohibiting stream copy in many cases thus it should only be considered
* as a last resort.
#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe.
#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT).
-/* Fx : Flag for h263+ extra options */
+/* Fx : Flag for H.263+ extra options */
#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
* are connected to a parser to split what they return into proper frames.
* This flag is reserved to the very rare category of codecs which have a
* bitstream that cannot be split into frames without timeconsuming
- * operations like full decoding. Demuxers carring such bitstreams thus
+ * operations like full decoding. Demuxers carrying such bitstreams thus
* may return multiple frames in a packet. This has many disadvantages like
* prohibiting stream copy in many cases thus it should only be considered
* as a last resort.
#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
#define MB_TYPE_QUANT 0x00010000
#define MB_TYPE_CBP 0x00020000
-//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
+// Note bits 24-31 are reserved for codec specific use (H.264 ref0, MPEG-1 0mv, ...)
#endif
/**
/**
* some codecs need / can use extradata like Huffman tables.
- * mjpeg: Huffman tables
+ * MJPEG: Huffman tables
* rv10: additional flags
- * mpeg4: global headers (they can be in the bitstream or here)
+ * MPEG-4: global headers (they can be in the bitstream or here)
* The allocated memory should be AV_INPUT_BUFFER_PADDING_SIZE bytes larger
- * than extradata_size to avoid prolems if it is read with the bitstream reader.
+ * than extradata_size to avoid problems if it is read with the bitstream reader.
* The bytewise contents of extradata must not depend on the architecture or CPU endianness.
* - encoding: Set/allocated/freed by libavcodec.
* - decoding: Set/allocated/freed by user.
* picture width / height.
*
* @note Those fields may not match the values of the last
- * AVFrame outputted by avcodec_decode_video2 due frame
+ * AVFrame output by avcodec_decode_video2 due frame
* reordering.
*
* - encoding: MUST be set by user.
* the decoded frame is cropped before being output.
*
* @note Those field may not match the value of the last
- * AVFrame outputted by avcodec_receive_frame() due frame
+ * AVFrame output by avcodec_receive_frame() due frame
* reordering.
*
* - encoding: unused
/**
* Pixel format, see AV_PIX_FMT_xxx.
* May be set by the demuxer if known from headers.
- * May be overriden by the decoder if it knows better.
+ * May be overridden by the decoder if it knows better.
*
* @note This field may not match the value of the last
- * AVFrame outputted by avcodec_receive_frame() due frame
+ * AVFrame output by avcodec_receive_frame() due frame
* reordering.
*
* - encoding: Set by user.
#endif
/**
- * qscale factor between P and I-frames
- * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
+ * qscale factor between P- and I-frames
+ * If > 0 then the last P-frame quantizer will be used (q = lastp_q * factor + offset).
* If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
* - encoding: Set by user.
* - decoding: unused
*/
int slice_flags;
#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
-#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
+#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG-2 field pics)
#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
#if FF_API_XVMC
#endif
/**
- * minimum MB lagrange multipler
+ * minimum MB Lagrange multiplier
* - encoding: Set by user.
* - decoding: unused
*/
int mb_lmin;
/**
- * maximum MB lagrange multipler
+ * maximum MB Lagrange multiplier
* - encoding: Set by user.
* - decoding: unused
*/
* to all data planes. data[] must hold as many pointers as it can.
* extended_data must be allocated with av_malloc() and will be freed in
* av_frame_unref().
- * * otherwise exended_data must point to data
+ * * otherwise extended_data must point to data
* - buf[] must contain one or more pointers to AVBufferRef structures. Each of
* the frame's data and extended_data pointers must be contained in these. That
* is, one AVBufferRef for each allocated chunk of memory, not necessarily one
#define FF_BUG_TRUNCATED 16384
/**
- * strictly follow the standard (MPEG4, ...).
+ * strictly follow the standard (MPEG-4, ...).
* - encoding: Set by user.
* - decoding: Set by user.
* Setting this to STRICT or higher means the encoder and decoder will
*/
attribute_deprecated
int debug_mv;
-#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
-#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
-#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
+#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 // visualize forward predicted MVs of P-frames
+#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 // visualize forward predicted MVs of B-frames
+#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 // visualize backward predicted MVs of B-frames
#endif
/**
#define AV_EF_EXPLODE (1<<3)
/**
- * opaque 64bit number (generally a PTS) that will be reordered and
+ * opaque 64-bit number (generally a PTS) that will be reordered and
* output in AVFrame.reordered_opaque
* - encoding: unused
* - decoding: Set by user.
int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
/**
- * noise vs. sse weight for the nsse comparsion function
+ * noise vs. sse weight for the nsse comparison function
* - encoding: Set by user.
* - decoding: unused
*/
/**
* 0 terminated ASS/SSA compatible event line.
- * The pressentation of this is unaffected by the other values in this
+ * The presentation of this is unaffected by the other values in this
* struct.
*/
char *ass;
* next call to this function or until closing or flushing the
* decoder. The caller may not write to it.
*
- * @param[in] avpkt The input AVpacket containing the input buffer.
+ * @param[in] avpkt The input AVPacket containing the input buffer.
* You can create such packet with av_init_packet() and by then setting
* data and size, some decoders might in addition need other fields like
* flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
* a pointer to an AVClass struct
* @param[in] feature string containing the name of the missing feature
* @param[in] want_sample indicates if samples are wanted which exhibit this feature.
- * If want_sample is non-zero, additional verbage will be added to the log
+ * If want_sample is non-zero, additional verbiage will be added to the log
* message which tells the user how to report samples to the development
* mailing list.
* @deprecated Use avpriv_report_missing_feature() instead.
}
/**
- * Caclulate quantization tables for version b
+ * Calculate quantization tables for version b
*/
static av_cold void binkb_calc_quant(void)
{
/**
* Build VLC decoding tables suitable for use with get_vlc().
*
- * @param vlc the context to be initted
+ * @param vlc the context to be initialized
*
* @param table_nb_bits max length of vlc codes to store directly in this table
* (Longer codes are delegated to subtables.)
/* Build VLC decoding tables suitable for use with get_vlc().
- 'nb_bits' set thee decoding table size (2^nb_bits) entries. The
+ 'nb_bits' sets the decoding table size (2^nb_bits) entries. The
bigger it is, the faster is the decoding. But it should not be too
big to save memory and L1 cache. '9' is a good compromise.
#include "avcodec.h"
/**
- * Called by the biststream filters to get the next packet for filtering.
+ * Called by the bitstream filters to get the next packet for filtering.
* The filter is responsible for either freeing the packet or passing it to the
* caller.
*/
/*
* Cinepak Video Decoder
- * Copyright (C) 2003 the ffmpeg project
+ * Copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
VLC envelope_quant_index[13];
VLC sqvh[7]; // scalar quantization
- /* generatable tables and related variables */
+ /* generate tables and related variables */
int gain_size_factor;
float gain_table[23];
/* Initialize variable relations */
q->subpacket[s].numvector_size = (1 << q->subpacket[s].log2_numvector_size);
- /* Try to catch some obviously faulty streams, othervise it might be exploitable */
+ /* Try to catch some obviously faulty streams, otherwise it might be exploitable */
if (q->subpacket[s].total_subbands > 53) {
avpriv_request_sample(avctx, "total_subbands > 53");
return AVERROR_PATCHWELCOME;
q->saturate_output = saturate_output_float;
}
- /* Try to catch some obviously faulty streams, othervise it might be exploitable */
+ /* Try to catch some obviously faulty streams, otherwise it might be exploitable */
if (q->samples_per_channel != 256 && q->samples_per_channel != 512 &&
q->samples_per_channel != 1024) {
avpriv_request_sample(avctx, "samples_per_channel = %d",
/**
* @file
- * Cook AKA RealAudio G2 compatible decoderdata
+ * Cook AKA RealAudio G2 compatible decoder data
*/
#ifndef AVCODEC_COOKDATA_H
* based on "Creative YUV (CYUV) stream format for AVI":
* http://www.csse.monash.edu.au/~timf/videocodec/cyuv.txt
*
- * Copyright (C) 2003 the ffmpeg project
+ * Copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/* ADPCM data */
-/* 16bits signed fractional Q13 binary codes */
+/* 16 bits signed fractional Q13 binary codes */
const int16_t ff_dca_adpcm_vb[4096][4] = {
{ 9928, -2618, -1093, -1263 },
{ 11077, -2876, -1747, -308 },
5011872, 5688529, 6456542, 7328245, 8317638, 0, 0, 0
};
-/* 20bits unsigned fractional binary codes */
+/* 20 bits unsigned fractional binary codes */
const uint32_t ff_dca_lossy_quant[32] = {
0, 6710886, 4194304, 3355443, 2474639, 2097152, 1761608, 1426063,
796918, 461373, 251658, 146801, 79692, 46137, 27263, 16777,
84, 42, 21, 0, 0, 0, 0, 0
};
-/* 20bits unsigned fractional binary codes */
+/* 20 bits unsigned fractional binary codes */
const uint32_t ff_dca_lossless_quant[32] = {
0, 4194304, 2097152, 1384120, 1048576, 696254, 524288, 348127,
262144, 131072, 65431, 33026, 16450, 8208, 4100, 2049,
ff_dlog(s->avctx, "\n");
}
} else {
- av_log(avctx, AV_LOG_ERROR, "Non standard configuration %d !\n", s->amode);
+ av_log(avctx, AV_LOG_ERROR, "Nonstandard configuration %d !\n", s->amode);
return AVERROR_INVALIDDATA;
}
printf("dct-test [-i] [<test-number>]\n"
"test-number 0 -> test with random matrixes\n"
" 1 -> test with random sparse matrixes\n"
- " 2 -> do 3. test from mpeg4 std\n"
+ " 2 -> do 3. test from MPEG-4 std\n"
"-i test IDCT implementations\n"
"-4 test IDCT248 implementations\n"
"-t speed test\n");
const uint8_t *ac_run_flag, *ac_index_flag;
const uint16_t *run_codes;
const uint8_t *run_bits, *run;
- int bit_rates[5]; ///< Helpher to choose variants, rounded to nearest 5Mb/s
+ int bit_rates[5]; ///< Helper to choose variants, rounded to nearest 5Mb/s
} CIDEntry;
extern const CIDEntry ff_dnxhd_cid_table[];
#include "pixblockdsp.h"
#include "dnxhdenc.h"
-// The largest value that will not lead to overflow for 10bit samples.
+// The largest value that will not lead to overflow for 10-bit samples.
#define DNX10BIT_QMAT_SHIFT 18
#define RC_VARIANCE 1 // use variance or ssd for fast rc
#define LAMBDA_FRAC_BITS 10
/*
* Assorted DPCM codecs
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
- * DXVA2 H264 HW acceleration.
+ * DXVA2 H.264 HW acceleration.
*
* copyright (c) 2009 Laurent Aimar
*
#include "mpeg12vlc.h"
#define EA_PREAMBLE_SIZE 8
-#define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD i-frame */
-#define MADm_TAG MKTAG('M', 'A', 'D', 'm') /* MAD p-frame */
+#define MADk_TAG MKTAG('M', 'A', 'D', 'k') /* MAD I-frame */
+#define MADm_TAG MKTAG('M', 'A', 'D', 'm') /* MAD P-frame */
#define MADe_TAG MKTAG('M', 'A', 'D', 'e') /* MAD lqp-frame */
typedef struct MadContext {
#include "elbg.h"
#include "avcodec.h"
-#define DELTA_ERR_MAX 0.1 ///< Precision of the ELBG algorithm (as percentual error)
+#define DELTA_ERR_MAX 0.1 ///< Precision of the ELBG algorithm (as percentage error)
/**
* In the ELBG jargon, a cell is the set of points that are closest to a
/**
* Add the points in the low utility cell to its closest cell. Split the high
- * utility cell, putting the separed points in the (now empty) low utility
+ * utility cell, putting the separated points in the (now empty) low utility
* cell.
*
* @param elbg Internal elbg data
s->mv[0][0][1] = s->cur_pic.motion_val[dir][mb_x * 2 + mb_y * 2 * s->b8_stride][1];
}
- s->decode_mb(s->opaque, 0 /* FIXME h264 partitioned slices need this set */,
+ s->decode_mb(s->opaque, 0 /* FIXME H.264 partitioned slices need this set */,
mv_dir, mv_type, &s->mv, mb_x, mb_y, 0, 0);
}
}
AVFrame *f;
ThreadFrame *tf;
- // it's the caller responsability to allocate these buffers
+ // it is the caller's responsibility to allocate these buffers
int16_t (*motion_val[2])[2];
int8_t *ref_index[2];
mantissa <<= 1;
exp -= (1 << 23);
}
- // clamp the mantissa to 10-bits
+ // clamp the mantissa to 10 bits
mantissa &= ((1 << 10) - 1);
- // shift left to generate single-precision mantissa of 23-bits
+ // shift left to generate single-precision mantissa of 23 bits
mantissa <<= 13;
}
} else {
- // shift left to generate single-precision mantissa of 23-bits
+ // shift left to generate single-precision mantissa of 23 bits
mantissa <<= 13;
// generate single precision biased exponent value
exp = (exp << 13) + HALF_FLOAT_MIN_BIASED_EXP_AS_SINGLE_FP_EXP;
}
}
- // allocate thread data, used for non EXR_RAW compreesion types
+ // allocate thread data, used for non EXR_RAW compression types
s->thread_data = av_mallocz_array(avctx->thread_count, sizeof(EXRThreadData));
if (!s->thread_data)
return AVERROR_INVALIDDATA;
static int decode_init_thread_copy(AVCodecContext *avctx)
{ EXRContext *s = avctx->priv_data;
- // allocate thread data, used for non EXR_RAW compreesion types
+ // allocate thread data, used for non EXR_RAW compression types
s->thread_data = av_mallocz_array(avctx->thread_count, sizeof(EXRThreadData));
if (!s->thread_data)
return AVERROR_INVALIDDATA;
#include "tiff.h"
/**
- * initialize upacker code
+ * initialize unpacker code
*/
void ff_ccitt_unpack_init(void);
/*
* FLI/FLC Animation Video Decoder
- * Copyright (C) 2003, 2004 the ffmpeg project
+ * Copyright (C) 2003, 2004 The FFmpeg project
*
* This file is part of Libav.
*
case 8 : avctx->pix_fmt = AV_PIX_FMT_PAL8; break;
case 15 : avctx->pix_fmt = AV_PIX_FMT_RGB555; break;
case 16 : avctx->pix_fmt = AV_PIX_FMT_RGB565; break;
- case 24 : avctx->pix_fmt = AV_PIX_FMT_BGR24; /* Supposedly BGR, but havent any files to test with */
+ case 24 : avctx->pix_fmt = AV_PIX_FMT_BGR24; /* Supposedly BGR, but no files to test with */
av_log(avctx, AV_LOG_ERROR, "24Bpp FLC/FLX is unsupported due to no test files.\n");
return AVERROR_PATCHWELCOME;
default :
/* Should not get here, ever as the pix_fmt is processed */
/* in flic_decode_init and the above if should deal with */
- /* the finite set of possibilites allowable by here. */
+ /* the finite set of possibilities allowable by here. */
/* But in case we do, just error out. */
av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
return AVERROR_BUG;
avpriv_align_put_bits(&s->pb);
put_bits(&s->pb, 17, 1);
- /* 0: h263 escape codes 1: 11-bit escape codes */
+ /* 0: H.263 escape codes 1: 11-bit escape codes */
put_bits(&s->pb, 5, (s->h263_flv - 1));
put_bits(&s->pb, 8,
(((int64_t) s->picture_number * 30 * s->avctx->time_base.num) / // FIXME use timestamp
}
/**
- * Peform residual interpolation based on frame classification.
+ * Perform residual interpolation based on frame classification.
*
* @param buf decoded excitation vector
* @param out output vector
p->interp_index = comp_interp_index(p, p->pitch_lag[1],
&p->sid_gain, &p->cur_gain);
- /* Peform pitch postfiltering */
+ /* Perform pitch postfiltering */
if (p->postfilter) {
i = PITCH_MAX;
for (j = 0; j < SUBFRAMES; i += SUBFRAME_LEN, j++)
#include "put_bits.h"
/**
- * G.726 11bit float.
- * G.726 Standard uses rather odd 11bit floating point arithmentic for
+ * G.726 11-bit float.
+ * G.726 Standard uses rather odd 11-bit floating point arithmetic for
* numerous occasions. It's a mystery to me why they did it this way
- * instead of simply using 32bit integer arithmetic.
+ * instead of simply using 32-bit integer arithmetic.
*/
typedef struct Float11 {
- uint8_t sign; /**< 1bit sign */
- uint8_t exp; /**< 4bit exponent */
- uint8_t mant; /**< 6bit mantissa */
+ uint8_t sign; /**< 1 bit sign */
+ uint8_t exp; /**< 4 bits exponent */
+ uint8_t mant; /**< 6 bits mantissa */
} Float11;
static inline Float11* i2f(int i, Float11* f)
int code_size;
} G726Context;
-static const int quant_tbl16[] = /**< 16kbit/s 2bits per sample */
+static const int quant_tbl16[] = /**< 16kbit/s 2 bits per sample */
{ 260, INT_MAX };
static const int16_t iquant_tbl16[] =
{ 116, 365, 365, 116 };
static const uint8_t F_tbl16[] =
{ 0, 7, 7, 0 };
-static const int quant_tbl24[] = /**< 24kbit/s 3bits per sample */
+static const int quant_tbl24[] = /**< 24kbit/s 3 bits per sample */
{ 7, 217, 330, INT_MAX };
static const int16_t iquant_tbl24[] =
{ INT16_MIN, 135, 273, 373, 373, 273, 135, INT16_MIN };
static const uint8_t F_tbl24[] =
{ 0, 1, 2, 7, 7, 2, 1, 0 };
-static const int quant_tbl32[] = /**< 32kbit/s 4bits per sample */
+static const int quant_tbl32[] = /**< 32kbit/s 4 bits per sample */
{ -125, 79, 177, 245, 299, 348, 399, INT_MAX };
static const int16_t iquant_tbl32[] =
{ INT16_MIN, 4, 135, 213, 273, 323, 373, 425,
static const uint8_t F_tbl32[] =
{ 0, 0, 0, 1, 1, 1, 3, 7, 7, 3, 1, 1, 1, 0, 0, 0 };
-static const int quant_tbl40[] = /**< 40kbit/s 5bits per sample */
+static const int quant_tbl40[] = /**< 40kbit/s 5 bits per sample */
{ -122, -16, 67, 138, 197, 249, 297, 338,
377, 412, 444, 474, 501, 527, 552, INT_MAX };
static const int16_t iquant_tbl40[] =
/**
- * Para 4.2.2 page 18: Adaptive quantizer.
+ * Paragraph 4.2.2 page 18: Adaptive quantizer.
*/
static inline uint8_t quant(G726Context* c, int d)
{
}
/**
- * Para 4.2.3 page 22: Inverse adaptive quantizer.
+ * Paragraph 4.2.3 page 22: Inverse adaptive quantizer.
*/
static inline int16_t inverse_quant(G726Context* c, int i)
{
int dql, dex, dqt;
dql = c->tbls.iquant[i] + (c->y >> 2);
- dex = (dql>>7) & 0xf; /* 4bit exponent */
+ dex = (dql>>7) & 0xf; /* 4-bit exponent */
dqt = (1<<7) + (dql & 0x7f); /* log2 -> linear */
return (dql < 0) ? 0 : ((dqt<<dex) >> 7);
}
*
* GET_CACHE(name, gb)
* Will output the contents of the internal cache,
- * next bit is MSB of 32 or 64 bit (FIXME 64bit).
+ * next bit is MSB of 32 or 64 bits (FIXME 64 bits).
*
* SHOW_UBITS(name, gb, num)
* Will return the next num bits.
}
/**
- * read mpeg1 dc style vlc (sign bit + mantisse with no MSB).
+ * Read MPEG-1 dc-style VLC (sign bit + mantisse with no MSB).
* if MSB not set it is negative
* @param n length in bits
*/
/*
- * H261 common code
+ * H.261 common code
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2004 Maarten Daniels
*
/**
* @file
- * h261codec.
+ * H.261 codec
*/
#include "avcodec.h"
/*
- * H261 decoder
+ * H.261 codec
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2004 Maarten Daniels
*
/**
* @file
- * h261codec.
+ * H.261 codec.
*/
#ifndef AVCODEC_H261_H
/*
- * H261 parser
+ * H.261 parser
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2004 Maarten Daniels
*
/**
* @file
- * h261codec.
+ * H.261 parser
*/
#include "parser.h"
/*
- * H261 decoder
+ * H.261 decoder
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2004 Maarten Daniels
*
init_get_bits(&s->gb, buf, buf_size * 8);
if (!s->context_initialized)
- // we need the IDCT permutaton for reading a custom matrix
+ // we need the IDCT permutation for reading a custom matrix
ff_mpv_idct_init(s);
ret = h261_decode_picture_header(h);
/*
- * H261 encoder
+ * H.261 encoder
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2004 Maarten Daniels
*
/*
- * H263/MPEG4 backend for encoder and decoder
+ * H.263/MPEG-4 backend for encoder and decoder
* Copyright (c) 2000,2001 Fabrice Bellard
- * H263+ support.
+ * H.263+ support.
* Copyright (c) 2001 Juan J. Sierralta P
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
/**
* @file
- * h263/mpeg4 codec.
+ * H.263/MPEG-4 codec.
*/
#include <limits.h>
A = mot_val[ - 1];
/* special case for first (slice) line */
if (s->first_slice_line && block<3) {
- // we can't just change some MVs to simulate that as we need them for the B frames (and ME)
+ // we can't just change some MVs to simulate that as we need them for the B-frames (and ME)
// and if we ever support non rectangular objects than we need to do a few ifs here anyway :(
if(block==0){ //most common case
if(s->mb_x == s->resync_mb_x){ //rare
/*
- * H263 internal header
+ * H.263 internal header
*
* This file is part of Libav.
*
int16_t block[6][64]);
/**
- * Return the value of the 3bit "source format" syntax element.
+ * Return the value of the 3-bit "source format" syntax element.
* This represents some standard picture dimensions or indicates that
* width&height are explicitly stored later.
*/
/*
- * H263+ tables
+ * H.263+ tables
*
* This file is part of Libav.
*
/*
* copyright (c) 2000,2001 Fabrice Bellard
- * H263+ support
+ * H.263+ support
* copyright (c) 2001 Juan J. Sierralta P
* copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
}
s->codec_id = avctx->codec->id;
- /* for h263, we allocate the images after having read the header */
+ /* for H.263, we allocate the images after having read the header */
if (avctx->codec->id != AV_CODEC_ID_H263 &&
avctx->codec->id != AV_CODEC_ID_MPEG4) {
avctx->pix_fmt = h263_get_format(avctx);
return ret;
if (!s->context_initialized)
- // we need the idct permutaton for reading a custom matrix
+ // we need the idct permutation for reading a custom matrix
ff_mpv_idct_init(s);
/* let's go :-) */
SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c)
}
- /* After H263 & mpeg4 header decode we have the height, width,
+ /* After H.263 & MPEG-4 header decode we have the height, width,
* and other parameters. So then we could init the picture.
- * FIXME: By the way H263 decoder is evolving it should have
+ * FIXME: By the way H.263 decoder is evolving it should have
* an H263EncContext */
if (s->width != avctx->coded_width ||
s->height != avctx->coded_height ||
/**
* @file
- * H.264 / AVC / MPEG4 part10 codec.
+ * H.264 / AVC / MPEG-4 part10 codec.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
/**
* @file
- * H.264 / AVC / MPEG4 part10 codec.
+ * H.264 / AVC / MPEG-4 part10 codec.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4];
- ///< as a dct coeffecient is int32_t in high depth, we need to reserve twice the space.
+ ///< as a DCT coefficient is int32_t in high depth, we need to reserve twice the space.
DECLARE_ALIGNED(16, int16_t, mb)[16 * 48 * 2];
DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2];
///< as mb is addressed by scantable[i] and scantable is uint8_t we can either
H2645Packet pkt;
- int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264
+ int pixel_shift; ///< 0 for 8-bit H.264, 1 for high-bit-depth H.264
/* coded dimensions -- 16 * mb w/h */
int width, height;
int nal_unit_type;
/**
- * Used to parse AVC variant of h264
+ * Used to parse AVC variant of H.264
*/
int is_avc; ///< this flag is != 0 if codec is avc1
int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
* @{
*/
/**
- * current slice number, used to initalize slice_num of each thread/context
+ * current slice number, used to initialize slice_num of each thread/context
*/
int current_slice;
int temporal_id;
/**
- * H264 only, nal_ref_idc
+ * H.264 only, nal_ref_idc
*/
int ref_idc;
} H2645NAL;
/**
* @file
- * H.264 / AVC / MPEG4 part10 cabac decoding.
+ * H.264 / AVC / MPEG-4 part10 cabac decoding.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
{ 2, 54 }, { 3, 74 }, { -28,127 }, { -23, 104 },
{ -6, 53 }, { -1, 54 }, { 7, 51 },
- /* 11 - 23 unsused for I */
+ /* 11 - 23 unused for I */
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
/**
* @file
- * H.264 / AVC / MPEG4 part10 cavlc bitstream decoding.
+ * H.264 / AVC / MPEG-4 part10 cavlc bitstream decoding.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
/**
* @file
- * H.264 / AVC / MPEG4 part10 direct mb/block decoding.
+ * H.264 / AVC / MPEG-4 part10 direct mb/block decoding.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
/**
* @file
- * H.264 / AVC / MPEG4 part10 loop filter.
+ * H.264 / AVC / MPEG-4 part10 loop filter.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
/**
* @file
- * H.264 / AVC / MPEG4 part10 macroblock decoding
+ * H.264 / AVC / MPEG-4 part10 macroblock decoding
*/
#include <stdint.h>
/**
* Wait until all reference frames are available for MC operations.
*
- * @param h the H264 context
+ * @param h the H.264 context
*/
static void await_references(const H264Context *h, H264SliceContext *sl)
{
/*
- * H.26L/H.264/AVC/JVT/14496-10/... motion vector predicion
+ * H.26L/H.264/AVC/JVT/14496-10/... motion vector prediction
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of Libav.
/**
* @file
- * H.264 / AVC / MPEG4 part10 motion vector predicion.
+ * H.264 / AVC / MPEG-4 part10 motion vector prediction.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
int chroma_log2_weight_denom;
int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
- // The following 2 can be changed to int8_t but that causes 10cpu cycles speedloss
+ // The following 2 can be changed to int8_t but that causes a 10 CPU cycles speed loss
int luma_weight[48][2][2];
int chroma_weight[48][2][2][2];
int implicit_weight[48][48][2];
/**
* @file
- * H.264 / AVC / MPEG4 part10 parser.
+ * H.264 / AVC / MPEG-4 part10 parser.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
/**
* @file
- * H.264 / AVC / MPEG4 part10 codec.
+ * H.264 / AVC / MPEG-4 part10 codec.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
/**
* @file
- * H.264 / AVC / MPEG4 part10 parameter set decoding.
+ * H.264 / AVC / MPEG-4 part10 parameter set decoding.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
/**
* @file
- * H.264 / AVC / MPEG4 part10 reference picture handling.
+ * H.264 / AVC / MPEG-4 part10 reference picture handling.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
av_log(h->avctx, AV_LOG_DEBUG, "mmco: unref long failure\n");
break;
case MMCO_LONG:
- // Comment below left from previous code as it is an interresting note.
+ // Comment below left from previous code as it is an interesting note.
/* First field in pair is in short term list or
* at a different long term index.
* This is not allowed; see 7.4.3.3, notes 2 and 3.
/*
- * H.26L/H.264/AVC/JVT/14496-10/... sei decoding
+ * H.26L/H.264/AVC/JVT/14496-10/... SEI decoding
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of Libav.
/**
* @file
- * H.264 / AVC / MPEG4 part10 sei decoding.
+ * H.264 / AVC / MPEG-4 part10 SEI decoding.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
/**
* @file
- * H.264 / AVC / MPEG4 part10 codec.
+ * H.264 / AVC / MPEG-4 part10 codec.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
av_fast_malloc(&sl->bipred_scratchpad, &sl->bipred_scratchpad_allocated, 16 * 6 * alloc_size);
// edge emu needs blocksize + filter length - 1
- // (= 21x21 for h264)
+ // (= 21x21 for H.264)
av_fast_malloc(&sl->edge_emu_buffer, &sl->edge_emu_buffer_allocated, alloc_size * 2 * 21);
av_fast_malloc(&sl->top_borders[0], &sl->top_borders_allocated[0],
/**
* Decode a slice header.
- * This will (re)intialize the decoder and call h264_frame_start() as needed.
+ * This will (re)initialize the decoder and call h264_frame_start() as needed.
*
* @param h h264context
*
/**
* @file
- * H.264 / AVC / MPEG4 part10 DSP functions.
+ * H.264 / AVC / MPEG-4 part10 DSP functions.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
/*
- * H26L/H264/AVC/JVT/14496-10/... encoder/decoder
+ * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of Libav.
/**
* @file
* @brief
- * H264 / AVC / MPEG4 part10 codec data table
+ * H.264 / AVC / MPEG-4 part10 codec data table
* @author Michael Niedermayer <michaelni@gmx.at>
*/
/**
* @file
- * H.264 / AVC / MPEG4 part10 DSP functions.
+ * H.264 / AVC / MPEG-4 part10 DSP functions.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
int stride, int alpha, int beta);
void (*h264_h_loop_filter_chroma_mbaff_intra)(uint8_t *pix /*align 8*/,
int stride, int alpha, int beta);
- // h264_loop_filter_strength: simd only. the C version is inlined in h264.c
+ // h264_loop_filter_strength: simd only. the C version is inlined in h264_loopfilter.c
void (*h264_loop_filter_strength)(int16_t bS[2][4][4], uint8_t nnz[40],
int8_t ref[2][40], int16_t mv[2][40][2],
int bidir, int edges, int step,
/**
* @file
- * H.264 / AVC / MPEG4 part10 DSP functions.
+ * H.264 / AVC / MPEG-4 part10 DSP functions.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
/**
* @file
- * H.264 / AVC / MPEG4 part10 prediction functions.
+ * H.264 / AVC / MPEG-4 part10 prediction functions.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
h->pred16x16[TOP_DC_PRED8x8 ]= FUNCC(pred16x16_top_dc , depth);\
h->pred16x16[DC_128_PRED8x8 ]= FUNCC(pred16x16_128_dc , depth);\
\
- /* special lossless h/v prediction for h264 */ \
+ /* special lossless h/v prediction for H.264 */ \
h->pred4x4_add [VERT_PRED ]= FUNCC(pred4x4_vertical_add , depth);\
h->pred4x4_add [ HOR_PRED ]= FUNCC(pred4x4_horizontal_add , depth);\
h->pred8x8l_add [VERT_PRED ]= FUNCC(pred8x8l_vertical_add , depth);\
/**
* @file
- * H.264 / AVC / MPEG4 prediction functions.
+ * H.264 / AVC / MPEG-4 prediction functions.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#define TOP_DC_PRED8x8 5
#define DC_128_PRED8x8 6
-// H264/SVQ3 (8x8) specific
+// H.264/SVQ3 (8x8) specific
#define ALZHEIMER_DC_L0T_PRED8x8 7
#define ALZHEIMER_DC_0LT_PRED8x8 8
#define ALZHEIMER_DC_L00_PRED8x8 9
/**
* @file
- * H.264 / AVC / MPEG4 part10 prediction functions.
+ * H.264 / AVC / MPEG-4 part10 prediction functions.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
return z_scan_block_avail(s, x0, y0, xA1, yA1);
}
-//check if the two luma locations belong to the same mostion estimation region
+//check if the two luma locations belong to the same motion estimation region
static int isDiffMER(HEVCContext *s, int xN, int yN, int xP, int yP)
{
uint8_t plevel = s->ps.pps->log2_parallel_merge_level;
if (!s->quincunx_subsampling && s->frame_packing_arrangement_type != 5)
skip_bits(gb, 16); // frame[01]_grid_position_[xy]
skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte
- skip_bits1(gb); // frame_packing_arrangement_persistance_flag
+ skip_bits1(gb); // frame_packing_arrangement_persistence_flag
}
skip_bits1(gb); // upsampled_aspect_ratio_flag
return 0;
/*
* id Quake II CIN Video Decoder
- * Copyright (C) 2003 the ffmpeg project
+ * Copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
int sumLenArr[BANDS]; ///< bits for all coeffs in band
int skipFlagRaw[BANDS]; ///< skip flags are stored in raw form or not
int skipFlagBits[BANDS]; ///< bits used to code skip flags
- int skipFlagCount[BANDS]; ///< skipped coeffients per band
+ int skipFlagCount[BANDS]; ///< skipped coefficients per band
int skipFlags[COEFFS]; ///< skip coefficient decoding or not
int codewords[COEFFS]; ///< raw codewords read from bitstream
/* Some constants for parsing frame bitstream flags. */
-#define BS_8BIT_PEL (1 << 1) ///< 8bit pixel bitdepth indicator
+#define BS_8BIT_PEL (1 << 1) ///< 8-bit pixel bitdepth indicator
#define BS_KEYFRAME (1 << 2) ///< intra frame indicator
#define BS_MV_Y_HALF (1 << 4) ///< vertical mv halfpel resolution indicator
#define BS_MV_X_HALF (1 << 5) ///< horizontal mv halfpel resolution indicator
}
-/* Fill n lines with 64bit pixel value pix */
+/* Fill n lines with 64-bit pixel value pix */
static inline void fill_64(uint8_t *dst, const uint64_t pix, int32_t n,
int32_t row_offset)
{
/**
- * Pack two delta values (a,b) into one 16bit word
+ * Pack two delta values (a,b) into one 16-bit word
* according with endianness of the host machine.
*/
#if HAVE_BIGENDIAN
#undef PD
/**
- * Pack four delta values (a,a,b,b) into one 32bit word
+ * Pack four delta values (a,a,b,b) into one 32-bit word
* according with endianness of the host machine.
*/
#if HAVE_BIGENDIAN
return -1; /* marker */
}
if (get_bits1(&s->gb) != 0) {
- av_log(s->avctx, AV_LOG_ERROR, "Bad H263 id\n");
- return -1; /* h263 id */
+ av_log(s->avctx, AV_LOG_ERROR, "Bad H.263 id\n");
+ return -1; /* H.263 id */
}
skip_bits1(&s->gb); /* split screen off */
skip_bits1(&s->gb); /* camera off */
format = get_bits(&s->gb, 3);
if (format == 0 || format == 6) {
- av_log(s->avctx, AV_LOG_ERROR, "Intel H263 free format not supported\n");
+ av_log(s->avctx, AV_LOG_ERROR, "Intel H.263 free format not supported\n");
return -1;
}
s->h263_plus = 0;
} else {
format = get_bits(&s->gb, 3);
if(format == 0 || format == 7){
- av_log(s->avctx, AV_LOG_ERROR, "Wrong Intel H263 format\n");
+ av_log(s->avctx, AV_LOG_ERROR, "Wrong Intel H.263 format\n");
return -1;
}
if(get_bits(&s->gb, 2))
/*
* Interplay MVE Video Decoder
- * Copyright (C) 2003 the ffmpeg project
+ * Copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
int t, l;
if (i < 0) {
*level =
- *final = // prevent 'may be used unilitialized'
+ *final = // prevent 'may be used uninitialized'
*run = 64; // this would cause error exit in the ac loop
return;
}
sm = ac_decode_table[i];
e = get_bits(w->gb, sm & 0xF);
- sm >>= 8; // 3bits
+ sm >>= 8; // 3 bits
mask = sm & 0xff;
- sm >>= 8; // 1bit
+ sm >>= 8; // 1 bit
- *run = (sm & 0xff) + (e & mask); // 6bits
- *level = (sm >> 8) + (e & ~mask); // 5bits
+ *run = (sm & 0xff) + (e & mask); // 6 bits
+ *level = (sm >> 8) + (e & ~mask); // 5 bits
*final = i > (58 - 46);
} else if (i < 75) { // [73-74]
static const uint8_t crazy_mix_runlevel[32] = {
/*
- * ITU H263 bitstream decoder
+ * ITU H.263 bitstream decoder
* Copyright (c) 2000,2001 Fabrice Bellard
- * H263+ support.
+ * H.263+ support.
* Copyright (c) 2001 Juan J. Sierralta P
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
/**
* @file
- * h263 decoder.
+ * H.263 decoder.
*/
#include <limits.h>
if (!s->h263_long_vectors) {
val = sign_extend(val, 5 + f_code);
} else {
- /* horrible h263 long vector mode */
+ /* horrible H.263 long vector mode */
if (pred < -31 && val < -63)
val += 64;
if (pred > 32 && val > 63)
return SLICE_OK;
}
-/* most is hardcoded. should extend to handle all h263 streams */
+/* Most is hardcoded; should extend to handle all H.263 streams. */
int ff_h263_decode_picture_header(MpegEncContext *s)
{
int format, width, height, i, ret;
return -1;
}
if (get_bits1(&s->gb) != 0) {
- av_log(s->avctx, AV_LOG_ERROR, "Bad H263 id\n");
- return -1; /* h263 id */
+ av_log(s->avctx, AV_LOG_ERROR, "Bad H.263 id\n");
+ return -1; /* H.263 id */
}
skip_bits1(&s->gb); /* split screen off */
skip_bits1(&s->gb); /* camera off */
s->h263_long_vectors = get_bits1(&s->gb);
if (get_bits1(&s->gb) != 0) {
- av_log(s->avctx, AV_LOG_ERROR, "H263 SAC not supported\n");
+ av_log(s->avctx, AV_LOG_ERROR, "H.263 SAC not supported\n");
return -1; /* SAC: off */
}
s->obmc= get_bits1(&s->gb); /* Advanced prediction mode */
height = get_bits(&s->gb, 9) * 4;
ff_dlog(s->avctx, "\nH.263+ Custom picture: %dx%d\n",width,height);
if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) {
- /* aspected dimensions */
+ /* expected dimensions */
s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 8);
s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 8);
}else{
/*
- * ITU H263 bitstream encoder
+ * ITU H.263 bitstream encoder
* Copyright (c) 2000,2001 Fabrice Bellard
- * H263+ support.
+ * H.263+ support.
* Copyright (c) 2001 Juan J. Sierralta P
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
/**
* @file
- * h263 bitstream encoder.
+ * H.263 bitstream encoder.
*/
#include <limits.h>
put_sbits(&s->pb, 8, temp_ref); /* TemporalReference */
put_bits(&s->pb, 1, 1); /* marker */
- put_bits(&s->pb, 1, 0); /* h263 id */
+ put_bits(&s->pb, 1, 0); /* H.263 id */
put_bits(&s->pb, 1, 0); /* split screen off */
put_bits(&s->pb, 1, 0); /* camera off */
put_bits(&s->pb, 1, 0); /* freeze picture release off */
put_bits(&s->pb, 1, 0); /* Unrestricted Motion Vector: off */
put_bits(&s->pb, 1, 0); /* SAC: off */
put_bits(&s->pb, 1, s->obmc); /* Advanced Prediction */
- put_bits(&s->pb, 1, 0); /* only I/P frames, no PB frame */
+ put_bits(&s->pb, 1, 0); /* only I/P-frames, no PB-frame */
put_bits(&s->pb, 5, s->qscale);
put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */
} else {
}
/**
- * modify qscale so that encoding is acually possible in h263 (limit difference to -2..2)
+ * modify qscale so that encoding is actually possible in H.263 (limit difference to -2..2)
*/
void ff_clean_h263_qscales(MpegEncContext *s){
int i;
init_mv_penalty_and_fcode(s);
}
- s->me.mv_penalty= mv_penalty; //FIXME exact table for msmpeg4 & h263p
+ s->me.mv_penalty= mv_penalty; // FIXME exact table for MSMPEG4 & H.263+
s->intra_ac_vlc_length =s->inter_ac_vlc_length = uni_h263_inter_rl_len;
s->intra_ac_vlc_last_length=s->inter_ac_vlc_last_length= uni_h263_inter_rl_len + 128*64;
}
s->ac_esc_length= 7+1+6+8;
- // use fcodes >1 only for mpeg4 & h263 & h263p FIXME
+ // use fcodes >1 only for MPEG-4 & H.263 & H.263+ FIXME
switch(s->codec_id){
case AV_CODEC_ID_MPEG4:
s->fcode_tab= fcode_tab;
s->max_qcoeff= 127;
}
break;
- //Note for mpeg4 & h263 the dc-scale table will be set per frame as needed later
+ // Note for MPEG-4 & H.263 the dc-scale table will be set per frame as needed later
case AV_CODEC_ID_FLV1:
if (s->h263_flv > 1) {
s->min_qcoeff= -1023;
/**
* @file
- * DSP functions (inverse transforms, motion compensation, wavelet recompostions)
+ * DSP functions (inverse transforms, motion compensation, wavelet recompositions)
* for Indeo Video Interactive codecs.
*/
/**
* @file
- * DSP functions (inverse transforms, motion compensations, wavelet recompostion)
+ * DSP functions (inverse transforms, motion compensations, wavelet recomposition)
* for Indeo Video Interactive codecs.
*/
av_log(avctx, AV_LOG_ERROR, "Unknown quantization format\n");
break;
}
- /* FIXME: In openjepg code stespize = stepsize * 0.5. Why?
+ /* FIXME: In OpenJPEG code stespize = stepsize * 0.5. Why?
* If not set output of entropic decoder is not correct. */
if (!av_codec_is_encoder(avctx->codec))
band->f_stepsize *= 0.5;
else
reslevel->nbands = 3;
- /* Number of precincts wich span the tile for resolution level reslevelno
+ /* Number of precincts which span the tile for resolution level reslevelno
* see B.6 in ISO/IEC 15444-1:2002 eq. B-16
* num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)
* num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)
av_freep(&state);
/* the specification says that after doing 0xff escaping unused bits in
- * the last byte must be set to 0, so just append 7 "optional" zero-bits
+ * the last byte must be set to 0, so just append 7 "optional" zero bits
* to avoid special-casing. */
put_bits(&pb2, 7, 0);
size = put_bits_count(&pb2);
} LagarithContext;
/**
- * Compute the 52bit mantissa of 1/(double)denom.
+ * Compute the 52-bit mantissa of 1/(double)denom.
* This crazy format uses floats in an entropy coder and we have to match x86
* rounding exactly, thus ordinary floats aren't portable enough.
* @param denom denominator
- * @return 52bit mantissa
+ * @return 52-bit mantissa
* @see softfloat_mul
*/
static uint64_t softfloat_reciprocal(uint32_t denom)
/**
* (uint32_t)(x*f), where f has the given mantissa, and exponent 0
* Used in combination with softfloat_reciprocal computes x/(double)denom.
- * @param x 32bit integer factor
+ * @param x 32-bit integer factor
* @param mantissa mantissa of f with exponent 0
- * @return 32bit integer value (x*f)
+ * @return 32-bit integer value (x*f)
* @see softfloat_reciprocal
*/
static uint32_t softfloat_mul(uint32_t x, uint64_t mantissa)
int *left_top)
{
/* This is almost identical to add_hfyu_median_pred in huffyuvdsp.h.
- * However the &0xFF on the gradient predictor yealds incorrect output
+ * However the &0xFF on the gradient predictor yields incorrect output
* for lagarith.
*/
int i;
/*
* AMR Audio decoder stub
- * Copyright (c) 2003 the ffmpeg project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/* Match desired bitrate */
static int get_bitrate_mode(int bitrate, void *log_ctx)
{
- /* make the correspondance between bitrate and mode */
+ /* make the correspondence between bitrate and mode */
static const AMR_bitrates rates[] = {
{ 4750, MR475 }, { 5150, MR515 }, { 5900, MR59 }, { 6700, MR67 },
{ 7400, MR74 }, { 7950, MR795 }, { 10200, MR102 }, { 12200, MR122 }
* libopus encoder/decoder common code
* Copyright (c) 2012 Nicolas George
*
- * This file is part of libav.
+ * This file is part of Libav.
*
- * libav is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * libav is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with libav; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
* libopus encoder/decoder common code
* Copyright (c) 2012 Nicolas George
*
- * This file is part of libav.
+ * This file is part of Libav.
*
- * libav is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * libav is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with libav; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
const uint8_t *vorbis_offset = ff_vorbis_channel_layout_offsets[avc->channels - 1];
int ch;
- /* Remap channels from vorbis order to libav order */
+ /* Remap channels from Vorbis order to libav order */
for (ch = 0; ch < avc->channels; ch++)
mapping_arr[ch] = mapping[vorbis_offset[ch]];
mapping = mapping_arr;
* Opus encoder using libopus
* Copyright (c) 2012 Nathan Caldwell
*
- * This file is part of libav.
+ * This file is part of Libav.
*
- * libav is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * libav is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with libav; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
p_frame_output->key_frame = 1;
/* Parse the coded frame number from the bitstream. Bytes 14
- * through 17 represesent the frame number. */
+ * through 17 represent the frame number. */
p_frame_output->frame_num = AV_RB32(enc_buf->data + 13);
ff_schro_queue_push_back(&p_schro_params->enc_frame_queue,
if (s->vad)
speex_encoder_ctl(s->enc_state, SPEEX_SET_VAD, &s->vad);
- /* Activiting Discontinuous Transmission */
+ /* Activating Discontinuous Transmission */
if (s->dtx) {
speex_encoder_ctl(s->enc_state, SPEEX_SET_DTX, &s->dtx);
if (!(s->abr || s->vad || s->header.vbr))
Output first header packet consisting of theora
header, comment, and tables.
- Each one is prefixed with a 16bit size, then they
+ Each one is prefixed with a 16-bit size, then they
are concatenated together into libavcodec's extradata.
*/
offset = 0;
/*
* AMR Audio encoder stub
- * Copyright (c) 2003 the ffmpeg project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
static int get_wb_bitrate_mode(int bitrate, void *log_ctx)
{
- /* make the correspondance between bitrate and mode */
+ /* make the correspondence between bitrate and mode */
static const int rates[] = { 6600, 8850, 12650, 14250, 15850, 18250,
19850, 23050, 23850 };
int i, best = -1, min_diff = 0;
/*
- * Interface to xvidcore for mpeg4 encoding
+ * Interface to xvidcore for MPEG-4 encoding
* Copyright (c) 2004 Adam Thayer <krevnik@comcast.net>
*
* This file is part of Libav.
int ssim_acc; /**< SSIM accuracy. 0: accurate. 4: fast. */
int gmc;
int me_quality; /**< Motion estimation quality. 0: fast 6: best. */
- int mpeg_quant; /**< Quantization type. 0: H263, 1: MPEG */
+ int mpeg_quant; /**< Quantization type. 0: H.263, 1: MPEG */
};
/**
* Destroy the two-pass plugin context.
*
* @param ref Context pointer for the plugin
- * @param param Destrooy context
+ * @param param Destroy context
* @return Returns 0, success guaranteed
*/
static int xvid_ff_2pass_destroy(struct xvid_context *ref,
avctx->extradata = NULL;
avctx->extradata_size = 0;
if (xvid_flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
- /* In this case, we are claiming to be MPEG4 */
+ /* In this case, we are claiming to be MPEG-4 */
x->quicktime_format = 1;
avctx->codec_id = AV_CODEC_ID_MPEG4;
} else {
{
int i, j;
- /* sort lsfq in ascending order. float bubble agorithm,
+ /* sort lsfq in ascending order. float bubble algorithm,
O(n) if data already sorted, O(n^2) - otherwise */
for(i=0; i<lp_order-1; i++)
for(j=i; j>=0 && lsfq[j] > lsfq[j+1]; j--)
* @param lp_half_order half the number of the amount of LPCs to be
* reconstructed, need to be smaller or equal to MAX_LP_HALF_ORDER
*
- * @note buffers should have a minimux size of 2*lp_half_order elements.
+ * @note buffers should have a minimum size of 2*lp_half_order elements.
*
* TIA/EIA/IS-733 2.4.3.3.5
*/
len = get_bits(&s->gb, 16) - 2;
while (len >= 65) {
- /* only 8 bit precision handled */
+ /* only 8-bit precision handled */
if (get_bits(&s->gb, 4) != 0) {
- av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
+ av_log(s->avctx, AV_LOG_ERROR, "dqt: 16-bit precision\n");
return -1;
}
index = get_bits(&s->gb, 4);
s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
}
- // XXX FIXME finetune, and perhaps add dc too
+ // XXX FIXME fine-tune, and perhaps add dc too
s->qscale[index] = FFMAX(s->quant_matrixes[index][s->scantable.permutated[1]],
s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
av_log(s->avctx, AV_LOG_DEBUG, "qscale[%d]: %d\n",
av_log(s->avctx, AV_LOG_INFO,
"Pegasus lossless jpeg header found\n");
skip_bits(&s->gb, 16); /* version ? */
- skip_bits(&s->gb, 16); /* unknwon always 0? */
- skip_bits(&s->gb, 16); /* unknwon always 0? */
- skip_bits(&s->gb, 16); /* unknwon always 0? */
+ skip_bits(&s->gb, 16); /* unknown always 0? */
+ skip_bits(&s->gb, 16); /* unknown always 0? */
+ skip_bits(&s->gb, 16); /* unknown always 0? */
switch (get_bits(&s->gb, 8)) {
case 1:
s->rgb = 1;
int maxval;
int near; ///< near lossless bound (si 0 for lossless)
int t1,t2,t3;
- int reset; ///< context halfing intervall ?rename
+ int reset; ///< context halfing interval ?rename
int width, height;
int mb_width, mb_height;
#include "put_bits.h"
typedef struct MJpegContext {
- uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
+ uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chroma, for easier addressing
uint16_t huff_code_dc_luminance[12];
uint8_t huff_size_dc_chrominance[12];
uint16_t huff_code_dc_chrominance[12];
int group1_samplerate; ///< Sample rate of first substream
int group2_samplerate; ///< Sample rate of second substream (MLP only)
- int channel_modifier_thd_stream0; ///< Channel modifier for substream 0 of TrueHD sreams ("2-channel presentation")
- int channel_modifier_thd_stream1; ///< Channel modifier for substream 1 of TrueHD sreams ("6-channel presentation")
- int channel_modifier_thd_stream2; ///< Channel modifier for substream 2 of TrueHD sreams ("8-channel presentation")
+ int channel_modifier_thd_stream0; ///< Channel modifier for substream 0 of TrueHD streams ("2-channel presentation")
+ int channel_modifier_thd_stream1; ///< Channel modifier for substream 1 of TrueHD streams ("6-channel presentation")
+ int channel_modifier_thd_stream2; ///< Channel modifier for substream 2 of TrueHD streams ("8-channel presentation")
int channels_mlp; ///< Channel count for MLP streams
int channels_thd_stream1; ///< Channel count for substream 1 of TrueHD streams ("6-channel presentation")
// being busy from decoder waiting for input. So just poll at the start and
// keep feeding new data to the buffer.
// We are pretty sure the decoder will produce output if we sent more input
- // frames than what a h264 decoder could logically delay. This avoids too
+ // frames than what a H.264 decoder could logically delay. This avoids too
// excessive buffering.
// We also wait if we sent eos, but didn't receive it yet (think of decoding
// stream with a very low number of frames).
cx= (cx>>1)|(cx&1);
cy= (cy>>1)|(cy&1);
uvdxy= (cx&1) + 2*(cy&1);
- //FIXME x/y wrong, but mpeg4 qpel is sick anyway, we should drop as much of it as possible in favor for h264
+ // FIXME x/y wrong, but MPEG-4 qpel is sick anyway, we should drop as much of it as possible in favor for H.264
}
}else{
c->hpel_put[size][dxy](c->temp, ref[0] + x + y*stride, stride, h);
c->xmax = - x + s->mb_width *16;
c->ymax = - y + s->mb_height*16;
} else if (s->out_format == FMT_H261){
- // Search range of H261 is different from other codec standards
+ // Search range of H.261 is different from other codec standards
c->xmin = (x > 15) ? - 15 : 0;
c->ymin = (y > 15) ? - 15 : 0;
c->xmax = (x < s->mb_width * 16 - 16) ? 15 : 0;
if (s->out_format == FMT_H263) {
c->pred_x = P_MEDIAN[0];
c->pred_y = P_MEDIAN[1];
- } else { /* mpeg1 at least */
+ } else { /* MPEG-1 at least */
c->pred_x = P_LEFT[0];
c->pred_y = P_LEFT[1];
}
dmin= direct_search(s, mb_x, mb_y);
else
dmin= INT_MAX;
-//FIXME penalty stuff for non mpeg4
+// FIXME penalty stuff for non-MPEG-4
c->skip=0;
fmin = estimate_motion_b(s, mb_x, mb_y, s->b_forw_mv_table, 0, s->f_code) +
3 * penalty_factor;
{ /* ensure that the best point is in the MAP as h/qpel refinement needs it */
const unsigned key = (best[1]<<ME_MAP_MV_BITS) + best[0] + map_generation;
const int index= ((best[1]<<ME_MAP_SHIFT) + best[0])&(ME_MAP_SIZE-1);
- if(map[index]!=key){ //this will be executed only very rarey
+ if (map[index] != key) { // this will be executed only very rarely
score_map[index]= cmp(s, best[0], best[1], 0, 0, size, h, ref_index, src_index, cmpf, chroma_cmpf, flags);
map[index]= key;
}
if( best[0] < xmax && best[0] > xmin
&& best[1] < ymax && best[1] > ymin){
int d;
- //ensure that the refernece samples for hpel refinement are in the map
+ // ensure that the reference samples for hpel refinement are in the map
CHECK_MV(best[0]-1, best[1])
CHECK_MV(best[0]+1, best[1])
CHECK_MV(best[0], best[1]-1)
unsigned map_generation;
int penalty_factor;
const int ref_mv_stride= s->mb_stride; //pass as arg FIXME
- const int ref_mv_xy= s->mb_x + s->mb_y*ref_mv_stride; //add to last_mv beforepassing FIXME
+ const int ref_mv_xy = s->mb_x + s->mb_y * ref_mv_stride; // add to last_mv before passing FIXME
me_cmp_func cmpf, chroma_cmpf;
LOAD_COMMON
return dmin;
}
-//this function is dedicated to the braindamaged gcc
+//this function is dedicated to the brain damaged gcc
int ff_epzs_motion_search(MpegEncContext *s, int *mx_ptr, int *my_ptr,
int P[10][2], int src_index, int ref_index,
int16_t (*last_mv)[2], int ref_mv_scale,
/*
- * Generate a header file for hardcoded motionpixels RGB to YUV table
+ * Generate a header file for hardcoded motion pixels RGB to YUV table
*
* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
/*
- * Header file for hardcoded motionpixels RGB to YUV table
+ * Header file for hardcoded motion pixels RGB to YUV table
*
* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
/*
- * MPEG1/2 common code
+ * MPEG-1/2 common code
* Copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org>
*
* This file is part of Libav.
/*
- * MPEG1/2 tables
+ * MPEG-1/2 tables
* copyright (c) 2000,2001 Fabrice Bellard
* copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
/**
* @file
- * MPEG1/2 tables.
+ * MPEG-1/2 tables.
*/
#include "mpeg12data.h"
/*
- * MPEG1/2 tables
+ * MPEG-1/2 tables
* copyright (c) 2000,2001 Fabrice Bellard
* copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
/**
* @file
- * MPEG1/2 tables.
+ * MPEG-1/2 tables.
*/
#ifndef AVCODEC_MPEG12DATA_H
if (get_bits1(&s->gb) == 0) {
if (get_bits1(&s->gb) == 0) {
av_log(s->avctx, AV_LOG_ERROR,
- "invalid mb type in I Frame at %d %d\n",
+ "Invalid mb type in I-frame at %d %d\n",
s->mb_x, s->mb_y);
return AVERROR_INVALIDDATA;
}
mb_type = get_vlc2(&s->gb, ff_mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1);
if (mb_type < 0) {
av_log(s->avctx, AV_LOG_ERROR,
- "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
+ "Invalid mb type in P-frame at %d %d\n", s->mb_x, s->mb_y);
return AVERROR_INVALIDDATA;
}
mb_type = ptype2mb_type[mb_type];
mb_type = get_vlc2(&s->gb, ff_mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
if (mb_type < 0) {
av_log(s->avctx, AV_LOG_ERROR,
- "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
+ "Invalid mb type in B-frame at %d %d\n", s->mb_x, s->mb_y);
return AVERROR_INVALIDDATA;
}
mb_type = btype2mb_type[mb_type];
int i;
if (s->pict_type == AV_PICTURE_TYPE_I) {
av_log(s->avctx, AV_LOG_ERROR,
- "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
+ "skipped MB in I-frame at %d %d\n", s->mb_x, s->mb_y);
return AVERROR_INVALIDDATA;
}
int cc_count = 0;
int i;
// There is a caption count field in the data, but it is often
- // incorect. So count the number of captions present.
+ // incorrect. So count the number of captions present.
for (i = 5; i + 6 <= buf_size && ((p[i] & 0xfe) == 0xfe); i += 6)
cc_count++;
// Transform the DVD format into A53 Part 4 format
/*
- * MPEG1/2 encoder
+ * MPEG-1/2 encoder
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
/**
* @file
- * MPEG1/2 encoder
+ * MPEG-1/2 encoder
*/
#include <stdint.h>
if (find_frame_rate_index(s) < 0) {
if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
- av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
+ av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
avctx->time_base.den, avctx->time_base.num);
return -1;
} else {
av_log(avctx, AV_LOG_INFO,
- "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
+ "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
avctx->time_base.den, avctx->time_base.num);
}
}
if (s->current_picture.f->key_frame) {
AVRational framerate = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
- /* mpeg1 header repeated every gop */
+ /* MPEG-1 header repeated every GOP */
put_header(s, SEQ_START_CODE);
put_sbits(&s->pb, 12, s->width);
AVFrameSideData *side_data;
mpeg1_encode_sequence_header(s);
- /* mpeg1 picture header */
+ /* MPEG-1 picture header */
put_header(s, PICTURE_START_CODE);
/* temporal reference */
/*
- * MPEG1/2 VLC
+ * MPEG-1/2 VLC
* copyright (c) 2000,2001 Fabrice Bellard
* copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
/**
* @file
- * MPEG1/2 VLC.
+ * MPEG-1/2 VLC.
*/
#ifndef AVCODEC_MPEG12VLC_H
/*
* copyright (c) 2000,2001 Fabrice Bellard
- * H263+ support
+ * H.263+ support
* copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of Libav.
/**
* @file
- * mpeg4 tables.
+ * MPEG-4 tables.
*/
#ifndef AVCODEC_MPEG4DATA_H
#include <stdint.h>
#include "mpegvideo.h"
-/* dc encoding for mpeg4 */
+/* dc encoding for MPEG-4 */
const uint8_t ff_mpeg4_DCtab_lum[13][2] =
{
{3,3}, {3,2}, {2,2}, {2,3}, {1,3}, {1,4}, {1,5}, {1,6}, {1,7},
/*
- * MPEG4 decoder / encoder common code.
+ * MPEG-4 decoder / encoder common code
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
*
memset(s->ac_val[2] + c_xy, 0, (c_wrap + 1) * 16 * sizeof(int16_t));
/* clean MV */
- // we can't clear the MVs as they might be needed by a b frame
+ // we can't clear the MVs as they might be needed by a B-frame
s->last_mv[0][0][0] =
s->last_mv[0][0][1] =
s->last_mv[1][0][0] =
#define tab_size ((signed)FF_ARRAY_ELEMS(s->direct_scale_mv[0]))
#define tab_bias (tab_size / 2)
-// used by mpeg4 and rv10 decoder
+// used by MPEG-4 and rv10 decoder
void ff_mpeg4_init_direct_mv(MpegEncContext *s)
{
int i;
/*
- * MPEG4 encoder/decoder internal header.
+ * MPEG-4 encoder/decoder internal header.
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
*
int cplx_estimation_trash_b;
} Mpeg4DecContext;
-/* dc encoding for mpeg4 */
+/* dc encoding for MPEG-4 */
extern const uint8_t ff_mpeg4_DCtab_lum[13][2];
extern const uint8_t ff_mpeg4_DCtab_chrom[13][2];
/*
- * MPEG4 Video frame extraction
+ * MPEG-4 video frame extraction
* Copyright (c) 2003 Fabrice Bellard
* Copyright (c) 2003 Michael Niedermayer
*
/*
- * MPEG4 video parser prototypes
+ * MPEG-4 video parser prototypes
* Copyright (c) 2003 Fabrice Bellard
* Copyright (c) 2003 Michael Niedermayer
*
/*
- * MPEG4 decoder.
+ * MPEG-4 decoder
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
*
while ((1 << alpha) < w)
alpha++;
while ((1 << beta) < h)
- beta++; /* typo in the mpeg4 std for the definition of w' and h' */
+ beta++; /* typo in the MPEG-4 std for the definition of w' and h' */
w2 = 1 << alpha;
h2 = 1 << beta;
/* sprite_ref[3][0] = (a >> 1) * (2 * vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]);
* sprite_ref[3][1] = (a >> 1) * (2 * vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */
- /* this is mostly identical to the mpeg4 std (and is totally unreadable
+ /* This is mostly identical to the MPEG-4 std (and is totally unreadable
* because of that...). Perhaps it should be reordered to be more readable.
* The idea behind this virtual_ref mess is to be able to use shifts later
* per pixel instead of divides so the distance between points is converted
ff_thread_await_progress(&s->next_picture_ptr->tf, s->mb_y, 0);
}
- /* if we skipped it in the future P Frame than skip it now too */
+ /* if we skipped it in the future P-frame than skip it now too */
s->mb_skipped = s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC
if (s->mb_skipped) {
}
} else {
/* is setting low delay flag only once the smartest thing to do?
- * low delay detection won't be overriden. */
+ * low delay detection will not be overridden. */
if (s->picture_number == 0)
s->low_delay = 0;
}
s->interlaced_dct = 0;
if (!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO))
av_log(s->avctx, AV_LOG_INFO, /* OBMC Disable */
- "MPEG4 OBMC not supported (very likely buggy encoder)\n");
+ "MPEG-4 OBMC not supported (very likely buggy encoder)\n");
if (vo_ver_id == 1)
ctx->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */
else
ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_cae */
ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* inter_cae */
ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* no_update */
- ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* upampling */
+ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* upsampling */
}
if (!get_bits1(gb)) {
ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_blocks */
s->divx_packed = e == 3 && last == 'p';
if (s->divx_packed && !ctx->showed_packed_warning) {
av_log(s->avctx, AV_LOG_WARNING,
- "Invalid and inefficient vfw-avi packed B frames detected\n");
+ "Invalid and inefficient vfw-avi packed B-frames detected\n");
ctx->showed_packed_warning = 1;
}
}
if (s->pp_time <= s->pb_time ||
s->pp_time <= s->pp_time - s->pb_time ||
s->pp_time <= 0) {
- /* messed up order, maybe after seeking? skipping current b-frame */
+ /* messed up order, maybe after seeking? skipping current B-frame */
return FRAME_SKIPPED;
}
ff_mpeg4_init_direct_mv(s);
s->chroma_qscale = s->qscale = get_bits(gb, s->quant_precision);
if (s->qscale == 0) {
av_log(s->avctx, AV_LOG_ERROR,
- "Error, header damaged or not MPEG4 header (qscale=0)\n");
+ "Error, header damaged or not MPEG-4 header (qscale=0)\n");
return -1; // makes no sense to continue, as there is nothing left from the image then
}
s->f_code = get_bits(gb, 3); /* fcode_for */
if (s->f_code == 0) {
av_log(s->avctx, AV_LOG_ERROR,
- "Error, header damaged or not MPEG4 header (f_code=0)\n");
+ "Error, header damaged or not MPEG-4 header (f_code=0)\n");
return -1; // makes no sense to continue, as there is nothing left from the image then
}
} else
}
}
/* detect buggy encoders which don't set the low_delay flag
- * (divx4/xvid/opendivx). Note we cannot detect divx5 without b-frames
+ * (divx4/xvid/opendivx). Note we cannot detect divx5 without B-frames
* easily (although it's buggy too) */
if (s->vo_type == 0 && ctx->vol_control_parameters == 0 &&
ctx->divx_version == -1 && s->picture_number == 0) {
}
/**
- * Decode mpeg4 headers.
+ * Decode MPEG-4 headers.
* @return <0 if no VOP found (or a damaged one)
* FRAME_SKIPPED if a not coded VOP is found
* 0 if a VOP is found
Mpeg4DecContext *ctx = avctx->priv_data;
MpegEncContext *s = &ctx->m;
- /* divx 5.01+ bistream reorder stuff */
+ /* divx 5.01+ bitstream reorder stuff */
if (s->divx_packed) {
int current_pos = get_bits_count(&s->gb) >> 3;
int startcode_found = 0;
}
s->h263_pred = 1;
- s->low_delay = 0; /* default, might be overriden in the vol header during header parsing */
+ s->low_delay = 0; /* default, might be overridden in the vol header during header parsing */
s->decode_mb = mpeg4_decode_mb;
ctx->time_increment_bits = 4; /* default value for broken headers */
/*
- * MPEG4 encoder.
+ * MPEG-4 encoder
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
*
#include "mpeg4video.h"
/* The uni_DCtab_* tables below contain unified bits+length tables to encode DC
- * differences in mpeg4. Unified in the sense that the specification specifies
+ * differences in MPEG-4. Unified in the sense that the specification specifies
* this encoding in several steps. */
static uint8_t uni_DCtab_lum_len[512];
static uint8_t uni_DCtab_chrom_len[512];
//#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64)
#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level))
-/* mpeg4
+/* MPEG-4
* inter
* max level: 24/6
* max run: 53/63
}
/**
- * Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
+ * Return the optimal value (0 or 1) for the ac_pred element for the given MB in MPEG-4.
* This function will also update s->block_last_index and s->ac_val.
* @param[in,out] block MB coefficients, these will be updated if 1 is returned
* @param[in] dir ac prediction direction for each 8x8 block
}
/**
- * modify mb_type & qscale so that encoding is acually possible in mpeg4
+ * modify mb_type & qscale so that encoding is actually possible in MPEG-4
*/
void ff_clean_mpeg4_qscales(MpegEncContext *s)
{
if (s->pict_type == AV_PICTURE_TYPE_B) {
int odd = 0;
/* ok, come on, this isn't funny anymore, there's more code for
- * handling this mpeg4 mess than for the actual adaptive quantization */
+ * handling this MPEG-4 mess than for the actual adaptive quantization */
for (i = 0; i < s->mb_num; i++) {
int mb_xy = s->mb_index2xy[i];
const int last_index = s->block_last_index[n];
if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
- /* mpeg4 based DC predictor */
+ /* MPEG-4 based DC predictor */
mpeg4_encode_dc(dc_pb, intra_dc, n);
if (last_index < 1)
return;
int len = 0;
if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
- /* mpeg4 based DC predictor */
+ /* MPEG-4 based DC predictor */
len += mpeg4_get_dc_length(intra_dc, n);
if (last_index < 1)
return len;
assert((s->dquant & 1) == 0);
assert(mb_type >= 0);
- /* nothing to do if this MB was skipped in the next P Frame */
+ /* nothing to do if this MB was skipped in the next P-frame */
if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { // FIXME avoid DCT & ...
s->skip_count++;
s->mv[0][0][0] =
if ((cbp | motion_x | motion_y | s->dquant) == 0 &&
s->mv_type == MV_TYPE_16X16) {
- /* check if the B frames can skip it too, as we must skip it
+ /* Check if the B-frames can skip it too, as we must skip it
* if we skip here why didn't they just compress
* the skip-mb bits instead of reusing them ?! */
if (s->max_b_frames > 0) {
}
/**
- * add mpeg4 stuffing bits (01...1)
+ * add MPEG-4 stuffing bits (01...1)
*/
void ff_mpeg4_stuffing(PutBitContext *pbc)
{
put_bits(&s->pb, 2, 0); /* sprite enable */
put_bits(&s->pb, 1, 0); /* not 8 bit == false */
- put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
+ put_bits(&s->pb, 1, s->mpeg_quant); /* quant type = (0 = H.263 style) */
if (s->mpeg_quant) {
ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
}
}
-/* write mpeg4 VOP header */
+/* write MPEG-4 VOP header */
void ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number)
{
int time_incr;
uint8_t *sc;
int slen, slen1, slen2;
- /* MPEG1 scale factors */
+ /* MPEG-1 scale factors */
slen1 = slen_table[0][g->scalefac_compress];
slen2 = slen_table[1][g->scalefac_compress];
ff_dlog(s->avctx, "slen1=%d slen2=%d\n", slen1, slen2);
that the frame size must be computed externally */
int avpriv_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header);
-/* useful helper to get mpeg audio stream infos. Return -1 if error in
+/* useful helper to get MPEG audio stream info. Return -1 if error in
header, otherwise the coded frame size in bytes */
int ff_mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate,
int *channels, int *frame_size, int *bitrate);
}
/*
- * Output the mpeg audio layer 2 frame. Note how the code is small
+ * Output the MPEG audio layer 2 frame. Note how the code is small
* compared to other encoders :-)
*/
static void encode_frame(MpegAudioContext *s,
/* header */
put_bits(p, 12, 0xfff);
- put_bits(p, 1, 1 - s->lsf); /* 1 = mpeg1 ID, 0 = mpeg2 lsf ID */
+ put_bits(p, 1, 1 - s->lsf); /* 1 = MPEG-1 ID, 0 = MPEG-2 lsf ID */
put_bits(p, 2, 4-2); /* layer 2 */
put_bits(p, 1, 1); /* no error protection */
put_bits(p, 4, s->bitrate_index);
int alloc_size = FFALIGN(FFABS(linesize) + 32, 32);
// edge emu needs blocksize + filter length - 1
- // (= 17x17 for halfpel / 21x21 for h264)
- // VC1 computes luma and chroma simultaneously and needs 19X19 + 9x9
+ // (= 17x17 for halfpel / 21x21 for H.264)
+ // VC-1 computes luma and chroma simultaneously and needs 19X19 + 9x9
// at uvlinesize. It supports only YUV420 so 24x24 is enough
// linesize * interlaced * MBsize
FF_ALLOCZ_OR_GOTO(avctx, sc->edge_emu_buffer, alloc_size * 2 * 24,
block[0] = block[0] * s->y_dc_scale;
else
block[0] = block[0] * s->c_dc_scale;
- /* XXX: only mpeg1 */
+ /* XXX: only MPEG-1 */
quant_matrix = s->intra_matrix;
for(i=1;i<=nCoeffs;i++) {
int j= s->intra_scantable.permutated[i];
s->next_p_frame_damaged = s1->next_p_frame_damaged;
s->workaround_bugs = s1->workaround_bugs;
- // MPEG4 timing info
+ // MPEG-4 timing info
memcpy(&s->last_time_base, &s1->last_time_base,
(char *) &s1->pb_field_time + sizeof(s1->pb_field_time) -
(char *) &s1->last_time_base);
AV_INPUT_BUFFER_PADDING_SIZE);
}
- // linesize dependend scratch buffer allocation
+ // linesize-dependent scratch buffer allocation
if (!s->sc.edge_emu_buffer)
if (s1->linesize) {
if (ff_mpeg_framesize_alloc(s->avctx, &s->me,
return AVERROR_BUG;
}
- // MPEG2/interlacing info
+ // MPEG-2/interlacing info
memcpy(&s->progressive_sequence, &s1->progressive_sequence,
(char *) &s1->rtp_mode - (char *) &s1->progressive_sequence);
mb_array_size = s->mb_height * s->mb_stride;
mv_table_size = (s->mb_height + 2) * s->mb_stride + 1;
- /* set default edge pos, will be overriden
+ /* set default edge pos, will be overridden
* in decode_header if needed */
s->h_edge_pos = s->mb_width * 16;
s->v_edge_pos = s->mb_height * 16;
yc_size = y_size + 2 * c_size;
FF_ALLOCZ_OR_GOTO(s->avctx, s->mb_index2xy, (s->mb_num + 1) * sizeof(int),
- fail); // error ressilience code looks cleaner with this
+ fail); // error resilience code looks cleaner with this
for (y = 0; y < s->mb_height; y++)
for (x = 0; x < s->mb_width; x++)
s->mb_index2xy[x + y * s->mb_width] = x + y * s->mb_stride;
/* init macroblock skip table */
FF_ALLOCZ_OR_GOTO(s->avctx, s->mbskip_table, mb_array_size + 2, fail);
- // Note the + 1 is for a quicker mpeg4 slice_end detection
+ // Note the + 1 is for a quicker MPEG-4 slice_end detection
return ff_mpeg_er_init(s);
fail:
}
/* release forgotten pictures */
- /* if (mpeg124/h263) */
+ /* if (MPEG-124 / H.263) */
for (i = 0; i < MAX_PICTURE_COUNT; i++) {
if (&s->picture[i] != s->last_picture_ptr &&
&s->picture[i] != s->next_picture_ptr &&
}
/* set dequantizer, we can't do it during init as
- * it might change for mpeg4 and we can't do it in the header
- * decode as init is not called for mpeg4 there yet */
+ * it might change for MPEG-4 and we can't do it in the header
+ * decode as init is not called for MPEG-4 there yet */
if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra;
s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter;
int y_dc_scale, c_dc_scale;
int ac_pred;
int block_last_index[12]; ///< last non zero coefficient in block
- int h263_aic; ///< Advanded INTRA Coding (AIC)
+ int h263_aic; ///< Advanced INTRA Coding (AIC)
/* scantables */
- ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
+ ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce the cache usage
ScanTable intra_scantable;
ScanTable intra_h_scantable;
ScanTable intra_v_scantable;
/* WARNING: changes above this line require updates to hardcoded
- * offsets used in asm. */
+ * offsets used in ASM. */
struct AVCodecContext *avctx;
/* the following parameters must be initialized before encoding */
int intra_only; ///< if true, only intra pictures are generated
int bit_rate; ///< wanted bit rate
enum OutputFormat out_format; ///< output format
- int h263_pred; ///< use mpeg4/h263 ac/dc predictions
- int pb_frame; ///< PB frame mode (0 = none, 1 = base, 2 = improved)
+ int h263_pred; ///< use MPEG-4/H.263 ac/dc predictions
+ int pb_frame; ///< PB-frame mode (0 = none, 1 = base, 2 = improved)
/* the following codec id fields are deprecated in favor of codec_id */
- int h263_plus; ///< h263 plus headers
- int h263_flv; ///< use flv h263 header
+ int h263_plus; ///< H.263+ headers
+ int h263_flv; ///< use flv H.263 header
enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
int fixed_qscale; ///< fixed qscale if non zero
int encoding; ///< true if we are encoding (vs decoding)
- int max_b_frames; ///< max number of b-frames for encoding
+ int max_b_frames; ///< max number of B-frames for encoding
int luma_elim_threshold;
int chroma_elim_threshold;
- int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
+ int strict_std_compliance; ///< strictly follow the std (MPEG-4, ...)
int workaround_bugs; ///< workaround bugs in encoders which cannot be detected automatically
int codec_tag; ///< internal codec_tag upper case converted from avctx codec_tag
/* the following fields are managed internally by the encoder */
ptrdiff_t uvlinesize; ///< line size, for chroma in bytes, may be different from width
Picture *picture; ///< main picture buffer
Picture **input_picture; ///< next pictures on display order for encoding
- Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
+ Picture **reordered_input_picture; ///< pointer to the next pictures in coded order for encoding
int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_encode_video2()
/**
Picture *last_picture_ptr; ///< pointer to the previous picture.
Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred)
Picture *current_picture_ptr; ///< pointer to the current picture
- int last_dc[3]; ///< last DC values for MPEG1
+ int last_dc[3]; ///< last DC values for MPEG-1
int16_t *dc_val_base;
- int16_t *dc_val[3]; ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
+ int16_t *dc_val[3]; ///< used for MPEG-4 DC prediction, all 3 arrays must be continuous
const uint8_t *y_dc_scale_table; ///< qscale -> y_dc_scale table
const uint8_t *c_dc_scale_table; ///< qscale -> c_dc_scale table
- const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (h263)
+ const uint8_t *chroma_qscale_table; ///< qscale -> chroma_qscale (H.263)
uint8_t *coded_block_base;
uint8_t *coded_block; ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
int16_t (*ac_val_base)[16];
- int16_t (*ac_val[3])[16]; ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
+ int16_t (*ac_val[3])[16]; ///< used for for MPEG-4 AC prediction, all 3 arrays must be continuous
int mb_skipped; ///< MUST BE SET only during DECODING
uint8_t *mbskip_table; /**< used to avoid copy if macroblock skipped (for black regions for example)
- and used for b-frame encoding & decoding (contains skip table of next P Frame) */
+ and used for B-frame encoding & decoding (contains skip table of next P-frame) */
uint8_t *mbintra_table; ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
uint8_t *cbp_table; ///< used to store cbp, ac_pred for partitioned decoding
uint8_t *pred_dir_table; ///< used to store pred_dir for partitioned decoding
int qscale; ///< QP
int chroma_qscale; ///< chroma QP
- unsigned int lambda; ///< lagrange multipler used in rate distortion
+ unsigned int lambda; ///< Lagrange multiplier used in rate distortion
unsigned int lambda2; ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
int *lambda_table;
int adaptive_quant; ///< use adaptive quantization
int dquant; ///< qscale difference to prev qscale
int pict_type; ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
int last_pict_type; //FIXME removes
- int last_non_b_pict_type; ///< used for mpeg4 gmc b-frames & ratecontrol
+ int last_non_b_pict_type; ///< used for MPEG-4 gmc B-frames & ratecontrol
int droppable;
int frame_rate_index;
int last_lambda_for[5]; ///< last lambda for a specific pict type
/* motion compensation */
int unrestricted_mv; ///< mv can point outside of the coded picture
- int h263_long_vectors; ///< use horrible h263v1 long vector mode
+ int h263_long_vectors; ///< use horrible H.263v1 long vector mode
BlockDSPContext bdsp;
FDCTDSPContext fdsp;
VideoDSPContext vdsp;
H263DSPContext h263dsp;
int f_code; ///< forward MV resolution
- int b_code; ///< backward MV resolution for B Frames (mpeg4)
+ int b_code; ///< backward MV resolution for B-frames (MPEG-4)
int16_t (*p_mv_table_base)[2];
int16_t (*b_forw_mv_table_base)[2];
int16_t (*b_back_mv_table_base)[2];
int16_t (*b_direct_mv_table_base)[2];
int16_t (*p_field_mv_table_base[2][2])[2];
int16_t (*b_field_mv_table_base[2][2][2])[2];
- int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) p-frame encoding
- int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode b-frame encoding
- int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode b-frame encoding
- int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
- int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
- int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode b-frame encoding
- int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced p-frame encoding
- int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
+ int16_t (*p_mv_table)[2]; ///< MV table (1MV per MB) P-frame encoding
+ int16_t (*b_forw_mv_table)[2]; ///< MV table (1MV per MB) forward mode B-frame encoding
+ int16_t (*b_back_mv_table)[2]; ///< MV table (1MV per MB) backward mode B-frame encoding
+ int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding
+ int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding
+ int16_t (*b_direct_mv_table)[2]; ///< MV table (1MV per MB) direct mode B-frame encoding
+ int16_t (*p_field_mv_table[2][2])[2]; ///< MV table (2MV per MB) interlaced P-frame encoding
+ int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced B-frame encoding
uint8_t (*p_field_select_table[2]);
uint8_t (*b_field_select_table[2][2]);
#if FF_API_MOTION_EST
int mv_dir;
#define MV_DIR_FORWARD 1
#define MV_DIR_BACKWARD 2
-#define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
+#define MV_DIRECT 4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (MPEG-4)
int mv_type;
#define MV_TYPE_16X16 0 ///< 1 vector for the whole mb
-#define MV_TYPE_8X8 1 ///< 4 vectors (h263, mpeg4 4MV)
+#define MV_TYPE_8X8 1 ///< 4 vectors (H.263, MPEG-4 4MV)
#define MV_TYPE_16X8 2 ///< 2 vectors, one per 16x8 block
#define MV_TYPE_FIELD 3 ///< 2 vectors, one per field
#define MV_TYPE_DMV 4 ///< 2 vectors, special mpeg2 Dual Prime Vectors
*/
int mv[2][4][2];
int field_select[2][2];
- int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
+ int last_mv[2][2][2]; ///< last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4
uint8_t *fcode_tab; ///< smallest fcode needed for each MV
int16_t direct_scale_mv[2][64]; ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
MotionEstContext me;
- int no_rounding; /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
- for b-frames rounding mode is always 0 */
+ int no_rounding; /**< apply no rounding to motion compensation (MPEG-4, msmpeg4, ...)
+ for B-frames rounding mode is always 0 */
/* macroblock layer */
int mb_x, mb_y;
int resync_mb_y; ///< y position of last resync marker
GetBitContext last_resync_gb; ///< used to search for the next resync marker
int mb_num_left; ///< number of MBs left in this video packet (for partitioned Slices only)
- int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed b frames
+ int next_p_frame_damaged; ///< set if the next p frame is damaged, to avoid showing trashed B-frames
ParseContext parse_context;
int rc_strategy;
/* H.263+ specific */
- int umvplus; ///< == H263+ && unrestricted_mv
+ int umvplus; ///< == H.263+ && unrestricted_mv
int h263_aic_dir; ///< AIC direction: 0 = left, 1 = top
int h263_slice_structured;
int alt_inter_vlc; ///< alternative inter vlc
int loop_filter;
int custom_pcf;
- /* mpeg4 specific */
+ /* MPEG-4 specific */
///< number of bits to represent the fractional part of time (encoder only)
int time_increment_bits;
int last_time_base;
int sprite_warping_accuracy;
int data_partitioning; ///< data partitioning flag from header
int partitioned_frame; ///< is current frame partitioned
- int low_delay; ///< no reordering needed / has no b-frames
+ int low_delay; ///< no reordering needed / has no B-frames
int vo_type;
PutBitContext tex_pb; ///< used for data partitioned VOPs
PutBitContext pb2; ///< used for data partitioned VOPs
int mpeg_quant;
- int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG4
+ int padding_bug_score; ///< used to detect the VERY common padding bug in MPEG-4
/* divx specific, used to workaround (many) bugs in divx5 */
int divx_packed;
int dc_table_index;
int use_skip_mb_code;
int slice_height; ///< in macroblocks
- int first_slice_line; ///< used in mpeg4 too to handle resync markers
+ int first_slice_line; ///< used in MPEG-4 too to handle resync markers
int flipflop_rounding;
int msmpeg4_version; ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
int per_mb_rl_table;
/* decompression specific */
GetBitContext gb;
- /* Mpeg1 specific */
- int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
- int last_mv_dir; ///< last mv_dir, used for b frame encoding
+ /* MPEG-1 specific */
+ int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num & MPEG-1 specific
+ int last_mv_dir; ///< last mv_dir, used for B-frame encoding
uint8_t *vbv_delay_ptr; ///< pointer to vbv_delay in the bitstream
/* MPEG-2-specific - I wished not to have to support this mess. */
int16_t *block/*align 16*/, int n, int qscale);
void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
int16_t *block/*align 16*/, int n, int qscale);
- void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
+ void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)
int16_t *block/*align 16*/, int n, int qscale);
- void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
+ void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)
int16_t *block/*align 16*/, int n, int qscale);
int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
/**
* ratecontrol qmin qmax limiting method
- * 0-> clipping, 1-> use a nice continuous function to limit qscale wthin qmin/qmax.
+ * 0-> clipping, 1-> use a nice continuous function to limit qscale within qmin/qmax.
*/
float rc_qsquish;
float rc_qmod_amp;
s->codec_id != AV_CODEC_ID_MPEG4 &&
s->codec_id != AV_CODEC_ID_MPEG1VIDEO &&
s->codec_id != AV_CODEC_ID_MPEG2VIDEO) {
- av_log(avctx, AV_LOG_ERROR, "b frames not supported by codec\n");
+ av_log(avctx, AV_LOG_ERROR, "B-frames not supported by codec\n");
return -1;
}
}
if (s->max_b_frames != 0) {
av_log(avctx, AV_LOG_ERROR,
- "b frames cannot be used with low delay\n");
+ "B-frames cannot be used with low delay\n");
return -1;
}
}
s->intra_matrix[j] =
s->inter_matrix[j] = ff_mpeg1_default_non_intra_matrix[i];
} else {
- /* mpeg1/2 */
+ /* MPEG-1/2 */
s->intra_matrix[j] = ff_mpeg1_default_intra_matrix[i];
s->inter_matrix[j] = ff_mpeg1_default_non_intra_matrix[i];
}
return ret;
pic->f->display_picture_number = display_picture_number;
- pic->f->pts = pts; // we set this here to avoid modifiying pic_arg
+ pic->f->pts = pts; // we set this here to avoid modifying pic_arg
} else {
/* Flushing: When we have not received enough input frames,
* ensure s->input_picture[0] contains the first picture */
if (s->frame_skip_threshold || s->frame_skip_factor) {
if (s->picture_in_gop_number < s->gop_size &&
skip_check(s, s->input_picture[0], s->next_picture_ptr)) {
- // FIXME check that te gop check above is +-1 correct
+ // FIXME check that the gop check above is +-1 correct
av_frame_unref(s->input_picture[0]->f);
emms_c();
if (s->input_picture[b_frames]->f->pict_type == AV_PICTURE_TYPE_B &&
b_frames == s->max_b_frames) {
av_log(s->avctx, AV_LOG_ERROR,
- "warning, too many b frames in a row\n");
+ "warning, too many B-frames in a row\n");
}
if (s->picture_in_gop_number + b_frames >= s->gop_size) {
return ret;
if (s->reordered_input_picture[0]->shared || s->avctx->rc_buffer_size) {
- // input is a shared pix, so we can't modifiy it -> alloc a new
+ // input is a shared pix, so we can't modify it -> allocate a new
// one & ensure that the shared one is reuseable
Picture *pic;
s->frame_bits = put_bits_count(&s->pb);
}
- /* update mpeg1/2 vbv_delay for CBR */
+ /* update MPEG-1/2 vbv_delay for CBR */
if (s->avctx->rc_max_rate &&
s->avctx->rc_min_rate == s->avctx->rc_max_rate &&
s->out_format == FMT_MPEG1 &&
memcpy(d->last_mv, s->last_mv, 2*2*2*sizeof(int)); //FIXME is memcpy faster than a loop?
- /* mpeg1 */
+ /* MPEG-1 */
d->mb_skip_run= s->mb_skip_run;
for(i=0; i<3; i++)
d->last_dc[i] = s->last_dc[i];
memcpy(d->mv, s->mv, 2*4*2*sizeof(int));
memcpy(d->last_mv, s->last_mv, 2*2*2*sizeof(int)); //FIXME is memcpy faster than a loop?
- /* mpeg1 */
+ /* MPEG-1 */
d->mb_skip_run= s->mb_skip_run;
for(i=0; i<3; i++)
d->last_dc[i] = s->last_dc[i];
ff_mpv_decode_mb(s, s->block);
}
- /* clean the MV table in IPS frames for direct mode in B frames */
+ /* clean the MV table in IPS frames for direct mode in B-frames */
if(s->mb_intra /* && I,P,S_TYPE */){
s->p_mv_table[xy][0]=0;
s->p_mv_table[xy][1]=0;
s->me.mb_var_sum_temp =
s->me.mc_mb_var_sum_temp = 0;
- /* we need to initialize some time vars before we can encode b-frames */
+ /* we need to initialize some time vars before we can encode B-frames */
// RAL: Condition added for MPEG1VIDEO
if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || s->codec_id == AV_CODEC_ID_MPEG2VIDEO || (s->h263_pred && !s->msmpeg4_version))
set_frame_distances(s);
if(s->out_format == FMT_H263){
unquant_coeff= alevel*qmul + qadd;
- }else{ //MPEG1
+ } else { // MPEG-1
j = s->idsp.idct_permutation[scantable[i]]; // FIXME: optimize
if(s->mb_intra){
unquant_coeff = (int)( alevel * qscale * s->intra_matrix[j]) >> 3;
score_tab[i+1]= best_score;
- //Note: there is a vlc code in mpeg4 which is 1 bit shorter then another one with a shorter run and the same level
+ // Note: there is a vlc code in MPEG-4 which is 1 bit shorter then another one with a shorter run and the same level
if(last_non_zero <= 27){
for(; survivor_count; survivor_count--){
if(score_tab[ survivor[survivor_count-1] ] <= best_score)
last_score= 256*256*256*120;
for(i= survivor[0]; i<=last_non_zero + 1; i++){
int score= score_tab[i];
- if(i) score += lambda*2; //FIXME exacter?
+ if (i)
+ score += lambda * 2; // FIXME more exact?
if(score < last_score){
last_score= score;
if(s->out_format == FMT_H263){
unquant_coeff= (alevel*qmul + qadd)>>3;
- }else{ //MPEG1
+ } else { // MPEG-1
unquant_coeff = ((( alevel << 1) + 1) * qscale * ((int) s->inter_matrix[0])) >> 4;
unquant_coeff = (unquant_coeff - 1) | 1;
}
#endif
dc += (1<<(RECON_SHIFT-1));
for(i=0; i<64; i++){
- rem[i]= dc - (orig[i]<<RECON_SHIFT); //FIXME use orig dirrectly instead of copying to rem[]
+ rem[i] = dc - (orig[i] << RECON_SHIFT); // FIXME use orig directly instead of copying to rem[]
}
#ifdef REFINE_STATS
STOP_TIMER("memset rem[]")}
}
/**
- * Permute an 8x8 block according to permuatation.
+ * Permute an 8x8 block according to permutation.
* @param block the block which will be permuted according to
* the given permutation vector
* @param permutation the permutation vector
}
/**
- * h263 chroma 4mv motion compensation.
+ * H.263 chroma 4mv motion compensation.
*/
static void chroma_4mv_motion(MpegEncContext *s,
uint8_t *dest_cb, uint8_t *dest_cr,
/*
- * MPEG1 / MPEG2 video parser
+ * MPEG-1 / MPEG-2 video parser
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
/**
* Initialize MQ-decoder.
* @param mqc MQ decoder state
- * @param bp byte poiter
+ * @param bp byte pointer
*/
void ff_mqc_initdec(MqcState *mqc, uint8_t *bp);
* MQ decoder.
* @param mqc MQ decoder state
* @param cxstate Context
- * @return Decision (0 ot 1)
+ * @return Decision (0 to 1)
*/
int ff_mqc_decode(MqcState *mqc, uint8_t *cxstate);
#include "vc1data.h"
/*
- * You can also call this codec : MPEG4 with a twist !
+ * You can also call this codec: MPEG-4 with a twist!
*
* TODO:
* - (encoding) select best mv table (two choices)
* - (encoding) select best vlc/dc table
*/
-/* This table is practically identical to the one from h263
+/* This table is practically identical to the one from H.263
* except that it is inverted. */
static av_cold void init_h263_dc_for_msmpeg4(void)
{
else
l= level;
- /* luminance h263 */
+ /* luminance H.263 */
uni_code= ff_mpeg4_DCtab_lum[size][0];
uni_len = ff_mpeg4_DCtab_lum[size][1];
uni_code ^= (1<<uni_len)-1; //M$ does not like compatibility
ff_v2_dc_lum_table[level + 256][0] = uni_code;
ff_v2_dc_lum_table[level + 256][1] = uni_len;
- /* chrominance h263 */
+ /* chrominance H.263 */
uni_code= ff_mpeg4_DCtab_chrom[size][0];
uni_len = ff_mpeg4_DCtab_chrom[size][1];
uni_code ^= (1<<uni_len)-1; //M$ does not like compatibility
c = FASTDIV((c + (scale >> 1)), scale);
}
#endif
- /* XXX: WARNING: they did not choose the same test as MPEG4. This
+ /* XXX: WARNING: they did not choose the same test as MPEG-4. This
is very important ! */
if(s->msmpeg4_version>3){
if(s->inter_intra_pred){
static VLC v2_mv_vlc;
VLC ff_inter_intra_vlc;
-/* This is identical to h263 except that its range is multiplied by 2. */
+/* This is identical to H.263 except that its range is multiplied by 2. */
static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code)
{
int code, val, sign, shift;
}
else
{
- av_log(s->avctx, AV_LOG_ERROR, "I frame too long, ignoring ext header\n");
+ av_log(s->avctx, AV_LOG_ERROR, "I-frame too long, ignoring ext header\n");
}
return 0;
}
s->dc_table_index = 1;
- s->mv_table_index = 1; /* only if P frame */
- s->use_skip_mb_code = 1; /* only if P frame */
+ s->mv_table_index = 1; /* only if P-frame */
+ s->use_skip_mb_code = 1; /* only if P-frame */
s->per_mb_rl_table = 0;
if(s->msmpeg4_version==4)
s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==AV_PICTURE_TYPE_P);
}
}
-/* Encoding of a block. Very similar to MPEG4 except for a different
- escape coding (same as H263) and more vlc tables.
- */
+/* Encoding of a block; very similar to MPEG-4 except for a different
+ * escape coding (same as H.263) and more VLC tables. */
void ff_msmpeg4_encode_block(MpegEncContext * s, int16_t * block, int n)
{
int level, run, last, i, j, last_index;
/*
* Microsoft RLE video decoder
- * Copyright (C) 2003 the ffmpeg project
+ * Copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
* Microsoft Video-1 Decoder
- * Copyright (C) 2003 the ffmpeg project
+ * Copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
// codec data (rtjpeg quant tables)
if (buf[0] == 'D' && buf[1] == 'R') {
int ret;
- // skip rest of the frameheader.
+ // Skip the rest of the frame header.
buf = &buf[12];
buf_size -= 12;
ret = get_quant(avctx, c, buf, buf_size);
keyframe = 1;
break;
}
- // skip rest of the frameheader.
+ // Skip the rest of the frame header.
buf = &buf[12];
buf_size -= 12;
if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
ret = nvenc_check_cap(avctx, NV_ENC_CAPS_NUM_MAX_BFRAMES);
if (ret < avctx->max_b_frames) {
- av_log(avctx, AV_LOG_VERBOSE, "Max b-frames %d exceed %d\n",
+ av_log(avctx, AV_LOG_VERBOSE, "Max B-frames %d exceed %d\n",
avctx->max_b_frames, ret);
return AVERROR(ENOSYS);
if (avctx->max_b_frames > 0) {
/* 0 is intra-only,
* 1 is I/P only,
- * 2 is one B Frame,
- * 3 two B frames, and so on. */
+ * 2 is one B-Frame,
+ * 3 two B-frames, and so on. */
ctx->config.frameIntervalP = avctx->max_b_frames + 1;
} else if (avctx->max_b_frames == 0) {
ctx->config.frameIntervalP = 1;
out_buffer.version = NV_ENC_CREATE_BITSTREAM_BUFFER_VER;
/* 1MB is large enough to hold most output frames.
- * NVENC increases this automaticaly if it's not enough. */
+ * NVENC increases this automatically if it is not enough. */
out_buffer.size = BITSTREAM_BUFFER_SIZE;
out_buffer.memoryHeap = NV_ENC_MEMORY_HEAP_SYSMEM_UNCACHED;
enum AVPixelFormat data_pix_fmt;
/* timestamps of the first two frames, for computing the first dts
- * when b-frames are present */
+ * when B-frames are present */
int64_t initial_pts[2];
int first_packet_output;
AVCodec ff_h264_nvenc_encoder = {
.name = "h264_nvenc",
- .long_name = NULL_IF_CONFIG_SMALL("NVIDIA NVENC H264 encoder"),
+ .long_name = NULL_IF_CONFIG_SMALL("NVIDIA NVENC H.264 encoder"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.init = ff_nvenc_encode_init,
AVCodec ff_nvenc_h264_encoder = {
.name = "nvenc_h264",
- .long_name = NULL_IF_CONFIG_SMALL("NVIDIA NVENC H264 encoder"),
+ .long_name = NULL_IF_CONFIG_SMALL("NVIDIA NVENC H.264 encoder"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.init = nvenc_old_init,
goto fail;
}
if (avctx->codec->id == AV_CODEC_ID_H264) {
- // For H264, the extradata can be returned in two separate buffers
+ // For H.264, the extradata can be returned in two separate buffers
// (the videocore encoder on raspberry pi does this);
// therefore check that we have got both SPS and PPS before continuing.
int nals[32] = { 0 };
if (buffer->nFlags & OMX_BUFFERFLAG_ENDOFFRAME) {
ret = pkt->size;
pkt->pts = av_rescale_q(from_omx_ticks(buffer->nTimeStamp), AV_TIME_BASE_Q, avctx->time_base);
- // We don't currently enable b-frames for the encoders, so set
+ // We don't currently enable B-frames for the encoders, so set
// pkt->dts = pkt->pts. (The calling code behaves worse if the encoder
// doesn't set the dts).
pkt->dts = pkt->pts;
};
AVCodec ff_mpeg4_omx_encoder = {
.name = "mpeg4_omx",
- .long_name = NULL_IF_CONFIG_SMALL("OpenMAX IL MPEG4 video encoder"),
+ .long_name = NULL_IF_CONFIG_SMALL("OpenMAX IL MPEG-4 video encoder"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG4,
.priv_data_size = sizeof(OMXCodecContext),
};
AVCodec ff_h264_omx_encoder = {
.name = "h264_omx",
- .long_name = NULL_IF_CONFIG_SMALL("OpenMAX IL H264 video encoder"),
+ .long_name = NULL_IF_CONFIG_SMALL("OpenMAX IL H.264 video encoder"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.priv_data_size = sizeof(OMXCodecContext),
{"qmin", "minimum video quantizer scale (VBR)", OFFSET(qmin), AV_OPT_TYPE_INT, {.i64 = 2 }, -1, 69, V|E},
{"qmax", "maximum video quantizer scale (VBR)", OFFSET(qmax), AV_OPT_TYPE_INT, {.i64 = 31 }, -1, 69, V|E},
{"qdiff", "maximum difference between the quantizer scales (VBR)", OFFSET(max_qdiff), AV_OPT_TYPE_INT, {.i64 = 3 }, INT_MIN, INT_MAX, V|E},
-{"bf", "use 'frames' B frames", OFFSET(max_b_frames), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, -1, INT_MAX, V|E},
+{"bf", "use 'frames' B-frames", OFFSET(max_b_frames), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, -1, INT_MAX, V|E},
{"b_qfactor", "QP factor between P- and B-frames", OFFSET(b_quant_factor), AV_OPT_TYPE_FLOAT, {.dbl = 1.25 }, -FLT_MAX, FLT_MAX, V|E},
#if FF_API_RC_STRATEGY
{"rc_strategy", "ratecontrol method", OFFSET(rc_strategy), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, V|E},
} else {
pkt->mode = OPUS_MODE_CELT;
pkt->bandwidth = (pkt->config - 16) >> 2;
- /* skip mediumband */
+ /* skip medium band */
if (pkt->bandwidth)
pkt->bandwidth++;
}
return AVERROR_INVALIDDATA;
}
- /* check that we din't see this index yet */
+ /* check that we did not see this index yet */
map->copy = 0;
for (j = 0; j < i; j++)
if (channel_map[channel_reorder(channels, j)] == idx) {
uint32_t last_header; // Cached header to see if parsing is needed
int block_size; // Size of a block of samples in bytes
int samples_per_block; // Number of samples per channel per block
- int groups_per_block; // Number of 20/24bit sample groups per block
+ int groups_per_block; // Number of 20/24-bit sample groups per block
uint8_t *extra_samples; // Pointer to leftover samples from a frame
int extra_sample_count; // Number of leftover samples in the buffer
} PCMDVDContext;
avctx->sample_rate *
avctx->bits_per_coded_sample;
- /* 4 samples form a group in 20/24bit PCM on DVD Video.
+ /* 4 samples form a group in 20/24-bit PCM on DVD Video.
* A block is formed by the number of groups that are
* needed to complete a set of samples for each channel. */
if (avctx->bits_per_coded_sample == 16) {
}
}
exit_loop:
- /* handle p-frames only if a predecessor frame is available */
+ /* handle P-frames only if a predecessor frame is available */
if (s->prev->data[0]) {
if (!(avpkt->flags & AV_PKT_FLAG_KEY)) {
int i, j;
#include "avcodec.h"
-/* H264 slice threading seems to be buggy with more than 16 threads,
+/* H.264 slice threading seems to be buggy with more than 16 threads,
* limit the number of threads to 16 for automatic detection */
#define MAX_AUTO_THREADS 16
*
* @param avctx the AV codec context
* @param buf_size length of the buffer
- * @param buf the bufffer
+ * @param buf the buffer
*
* @return the bitrate on success,
* I_F_Q if the bitrate cannot be satisfactorily determined
/**
* QDM2 checksum
*
- * @param data pointer to data to be checksum'ed
+ * @param data pointer to data to be checksummed
* @param length data length
* @param value checksum value
*
q->sub_packet = (q->sub_packet + 1) % 16;
- /* clip and convert output float[] to 16bit signed samples */
+ /* clip and convert output float[] to 16-bit signed samples */
for (i = 0; i < frame_size; i++) {
int value = (int)q->output_buffer[i];
/*
- * Intel MediaSDK QSV based MPEG2 decoder
+ * Intel MediaSDK QSV based MPEG-2 decoder
*
* copyright (c) 2015 Anton Khirnov
*
/*
* Quicktime Animation (RLE) Video Decoder
- * Copyright (C) 2004 the ffmpeg project
+ * Copyright (C) 2004 The FFmpeg project
*
* This file is part of Libav.
*
/* We will use it to compute the best bulk copy sequence */
unsigned int bulkcount;
- /* This will be the number of pixels equal to the preivous frame one's
+ /* This will be the number of pixels equal to the previous frame one's
* starting from the ith pixel */
unsigned int skipcount;
/* This will be the number of consecutive equal pixels in the current
prev_line -= s->pixel_size;
}
- /* Good ! Now we have the best sequence for this line, let's ouput it */
+ /* Good! Now we have the best sequence for this line, let's output it. */
/* We do a special case for the first pixel so that we avoid testing it in
* the whole loop */
/*
* Real Audio 1.0 (14.4K)
- * Copyright (c) 2003 the ffmpeg project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
* Real Audio 1.0 (14.4K)
- * Copyright (c) 2003 the ffmpeg project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/**
* Calculate match score and gain of an LPC-filtered vector with respect to
- * input data, possibly othogonalizing it to up to 2 other vectors
+ * input data, possibly orthogonalizing it to up to two other vectors.
*
* @param work array used to calculate the filtered vector
* @param coefs coefficients of the LPC filter
/**
* Find the best vector of a fixed codebook by applying an LPC filter to
- * codebook entries, possibly othogonalizing them to up to 2 other vectors and
- * matching the results with input data
+ * codebook entries, possibly orthogonalizing them to up to two other vectors
+ * and matching the results with input data.
*
* @param work array used to calculate the filtered vectors
* @param coefs coefficients of the LPC filter
/*
* RealAudio 2.0 (28.8K)
- * Copyright (c) 2003 the ffmpeg project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
* RealAudio 2.0 (28.8K)
- * Copyright (c) 2003 the ffmpeg project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
if (!rcc->entry)
return AVERROR(ENOMEM);
- /* init all to skipped p frames
- * (with b frames we might have a not encoded frame at the end FIXME) */
+ /* init all to skipped P-frames
+ * (with B-frames we might have a not encoded frame at the end FIXME) */
for (i = 0; i < rcc->num_entries; i++) {
RateControlEntry *rce = &rcc->entry[i];
next = strchr(p, ';');
if (next) {
- (*next) = 0; // sscanf in unbelievably slow on looong strings // FIXME copy / do not write
+ (*next) = 0; // sscanf is unbelievably slow on looong strings // FIXME copy / do not write
next++;
}
e = sscanf(p, " in:%d ", &picture_number);
int mb_distance;
float mb_factor = 0.0;
if (spat_cplx < 4)
- spat_cplx = 4; // FIXME finetune
+ spat_cplx = 4; // FIXME fine-tune
if (temp_cplx < 4)
- temp_cplx = 4; // FIXME finetune
+ temp_cplx = 4; // FIXME fine-tune
if ((s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_INTRA)) { // FIXME hq mode
cplx = spat_cplx;
double short_term_qsum; ///< sum of recent qscales
double short_term_qcount; ///< count of recent qscales
double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization
- double pass1_wanted_bits; ///< bits which should have been outputed by the pass1 code (including complexity init)
+ double pass1_wanted_bits; ///< bits which should have been output by the pass1 code (including complexity init)
double last_qscale;
double last_qscale_for[5]; ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff
int last_mc_mb_var_sum;
*(uint32_t*)(p + 2*stride)= v;
*(uint32_t*)(p + 3*stride)= v;
}else if(w==8){
- //gcc can't optimize 64bit math on x86_32
+ // gcc cannot optimize 64-bit math on x86_32
#if HAVE_FAST_64BIT
const uint64_t v= size==2 ? val*0x0001000100010001ULL : val*0x0100000001ULL;
*(uint64_t*)(p + 0*stride)= v;
* @param s rl2 context
* @param in input buffer
* @param size input buffer size
- * @param out ouput buffer
+ * @param out output buffer
* @param stride stride of the output buffer
* @param video_base offset of the rle data inside the frame
*/
/*
- * Copyright (C) 2003 the ffmpeg project
+ * Copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
}
enc->out_buf = pkt->data;
- /* Check for I frame */
+ /* Check for I-frame */
if (enc->framesSinceKeyframe == avctx->gop_size)
enc->framesSinceKeyframe = 0;
/*
* Quicktime Video (RPZA) Video Decoder
- * Copyright (C) 2003 the ffmpeg project
+ * Copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
av_log(s->avctx, AV_LOG_ERROR, "First chunk byte is 0x%02x instead of 0xe1\n",
bytestream2_peek_byte(&s->gb));
- /* Get chunk size, ingnoring first byte */
+ /* Get chunk size, ignoring first byte */
chunk_size = bytestream2_get_be32(&s->gb) & 0x00FFFFFF;
/* If length mismatch use size from MOV file and try to decode anyway */
ff_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
if (pb_frame) {
- avpriv_request_sample(s->avctx, "pb frame");
+ avpriv_request_sample(s->avctx, "PB-frame");
return AVERROR_PATCHWELCOME;
}
if (s->pp_time <= s->pb_time ||
s->pp_time <= s->pp_time - s->pb_time || s->pp_time <= 0) {
av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible "
- "from seeking? skipping current b frame\n");
+ "from seeking? skipping current B-frame\n");
return FRAME_SKIPPED;
}
ff_mpeg4_init_direct_mv(s);
put_bits(&s->pb, 1, (s->pict_type == AV_PICTURE_TYPE_P));
- put_bits(&s->pb, 1, 0); /* not PB frame */
+ put_bits(&s->pb, 1, 0); /* not PB-mframe */
put_bits(&s->pb, 5, s->qscale);
*
* This is really a three-dimensional matrix with dimensions
* [-1..9][-1..9][0..9]. The first and second coordinates are
- * detemined by the top and left neighbors (-1 if unavailable).
+ * determined by the top and left neighbors (-1 if unavailable).
*/
static const uint8_t rv30_itype_from_context[900] = {
0, 9, 9, 9, 9, 9, 9, 9, 9,
}
/**
- * Get one coefficient value from the bistream and store it.
+ * Get one coefficient value from the bitstream and store it.
*/
static inline void decode_coeff(int16_t *dst, int coef, int esc, GetBitContext *gb, VLC* vlc, int q)
{
return s->mb_y == s->mb_height;
}
-/** @} */ // recons group end
+/** @} */ // reconstruction group end
/**
* Initialize decoder.
int is16; ///< current block has additional 16x16 specific features or not
int dmv[4][2]; ///< differential motion vectors for the current macroblock
- int rv30; ///< indicates which RV variasnt is currently decoded
+ int rv30; ///< indicates which RV variant is currently decoded
int rpr; ///< one field size in RV30 slice header
int cur_pts, last_pts, next_pts;
int scaled_weight;
- int weight1, weight2; ///< B frame distance fractions (0.14) used in motion compensation
+ int weight1, weight2; ///< B-frame distance fractions (0.14) used in motion compensation
int mv_weight1, mv_weight2;
uint16_t *cbp_luma; ///< CBP values for luma subblocks
typedef struct ScreenpressoContext {
AVFrame *current;
- /* zlib interation */
+ /* zlib interaction */
uint8_t *inflated_buf;
uLongf inflated_size;
} ScreenpressoContext;
* simpleidct in C.
*/
-/*
- based upon some outcommented c code from mpeg2dec (idct_mmx.c
- written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>)
- */
+/* Based upon some commented-out C code from mpeg2dec (idct_mmx.c
+ * written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>). */
#include "simple_idct.h"
/*
* Quicktime Graphics (SMC) Video Decoder
- * Copyright (C) 2003 the ffmpeg project
+ * Copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
* Sunplus JPEG tables
- * Copyright (c) 2003 the ffmpeg project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
* ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
*
* Copyright (C) 2002 the xine project
- * Copyright (C) 2002 the ffmpeg project
+ * Copyright (C) 2002 The FFmpeg project
*
* SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>
*
* ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
*
* Copyright (C) 2002 the xine project
- * Copyright (C) 2002 the ffmpeg project
+ * Copyright (C) 2002 The FFmpeg project
*
* SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>
*
* ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
*
* Copyright (C) 2002 the xine project
- * Copyright (C) 2002 the ffmpeg project
+ * Copyright (C) 2002 The FFmpeg project
*
* This file is part of Libav.
*
/*
- * copyright (C) 2003 the ffmpeg project
+ * copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
* ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
*
* Copyright (C) 2002 the xine project
- * Copyright (C) 2002 the ffmpeg project
+ * Copyright (C) 2002 The FFmpeg project
*
* SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>
*
vector = codebook + stage * size * 16 + i * size;
sqr = s->ssd_int8_vs_int16(vector, block[stage], size);
diff = block_sum[stage] - sum;
- score = sqr - (diff * (int64_t)diff >> (level + 3)); // FIXME: 64bit slooow
+ score = sqr - (diff * (int64_t)diff >> (level + 3)); // FIXME: 64 bits slooow
if (score < best_vector_score) {
int mean = diff + (size >> 1) >> (level + 3);
assert(mean > -300 && mean < 300);
#define THIRDPEL_MODE 3
#define PREDICT_MODE 4
-/* dual scan (from some older h264 draft)
+/* dual scan (from some older H.264 draft)
* o-->o-->o o
* | /|
* o o o / o
AVFrame *jpgframe; // decoded JPEG tile
uint8_t *tilebuffer; // buffer containing tile data
- /* zlib interation */
+ /* zlib interaction */
uint8_t *deflatebuffer;
uLongf deflatelen;
return 0;
}
- /* Let's paint ont the buffer */
+ /* Let's paint onto the buffer */
tdsc_blit(ctx->refframe->data[0] + x * 3 + ctx->refframe->linesize[0] * y,
ctx->refframe->linesize[0],
ctx->jpgframe->data[0], ctx->jpgframe->linesize[0],
}
}
-/** Convert a premultiplied alpha pixel to a straigth alpha pixel. */
+/** Convert a premultiplied alpha pixel to a straight alpha pixel. */
static av_always_inline void premult2straight(uint8_t *src)
{
int r = src[0];
* the same inside that subinterval.
*
* Relying on this 1d approximation isn't always optimal in terms of
- * euclidean distance, but it's very close and a lot faster.
+ * Euclidean distance, but it's very close and a lot faster.
*
* http://cbloomrants.blogspot.com/2008/12/12-08-08-dxtc-summary.html */
c0_point = (stops[1] + stops[3]) >> 1;
if (fabs(vfb) > magn)
magn = fabs(vfb);
- /* if magnitudo is too small, default to luminance */
+ /* if magnitude is too small, default to luminance */
if (magn < 4.0f) {
/* JPEG YCbCr luma coefs, scaled by 1000 */
v_r = 299;
* bitrate/sample rate
*/
typedef struct TwinVQModeTab {
- struct TwinVQFrameMode fmode[3]; ///< frame type-dependant parameters
+ struct TwinVQFrameMode fmode[3]; ///< frame type-dependent parameters
uint16_t size; ///< frame size in samples
uint8_t n_lsp; ///< number of lsp coefficients
/**
* Sum to data a periodic peak of a given period, width and shape.
*
- * @param period the period of the peak divised by 400.0
+ * @param period the period of the peak divided by 400.0
*/
static void add_peak(int period, int width, const float *shape,
float ppc_gain, float *speech, int len)
return AVERROR(EINVAL);
}
- /* extradata size is 4 * 32bit */
+ /* extradata size is 4 * 32 bits */
avctx->extradata_size = 16;
avctx->extradata = av_mallocz(avctx->extradata_size +
src += width;
}
- /* Pad output to a 32bit boundary */
+ /* Pad output to a 32-bit boundary */
count = put_bits_count(&pb) & 0x1F;
if (count)
}
/*
- * Write frame information (LE 32bit unsigned)
+ * Write frame information (LE 32-bit unsigned)
* into the output packet.
* Contains the prediction method.
*/
start = end = pic;
if (pic->type != PICTURE_TYPE_IDR) {
- // If that was not an IDR frame, add B frames display-before and
+ // If that was not an IDR frame, add B-frames display-before and
// encode-after it.
for (i = 0; i < ctx->b_per_p; i++) {
if (last_pic->type == PICTURE_TYPE_B) {
// Some fixing up is required. Change the type of this
- // picture to P, then modify preceeding B references which
+ // picture to P, then modify preceding B references which
// point beyond it to point at it instead.
last_pic->type = PICTURE_TYPE_P;
av_assert0(pic->nb_refs <= 2);
if (pic->nb_refs >= 1) {
- // Backward reference for P or B frame.
+ // Backward reference for P- or B-frame.
av_assert0(pic->type == PICTURE_TYPE_P ||
pic->type == PICTURE_TYPE_B);
vslice->RefPicList0[0] = vpic->ReferenceFrames[0];
}
if (pic->nb_refs >= 2) {
- // Forward reference for B frame.
+ // Forward reference for B-frame.
av_assert0(pic->type == PICTURE_TYPE_B);
vslice->num_ref_idx_l1_active_minus1 = 0;
priv->fixed_qp_b = priv->fixed_qp_p;
av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
- "%d / %d / %d for IDR / P / B frames.\n",
+ "%d / %d / %d for IDR- / P- / B-frames.\n",
priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
return 0;
}
offsetof(VAAPIEncodeH264Options, x))
#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
static const AVOption vaapi_encode_h264_options[] = {
- { "qp", "Constant QP (for P frames; scaled by qfactor/qoffset for I/B)",
+ { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 20 }, 0, 52, FLAGS },
{ "quality", "Set encode quality (trades off against speed, higher is faster)",
OFFSET(quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, FLAGS },
av_assert0(pic->nb_refs <= 2);
if (pic->nb_refs >= 1) {
- // Backward reference for P or B frame.
+ // Backward reference for P- or B-frame.
av_assert0(pic->type == PICTURE_TYPE_P ||
pic->type == PICTURE_TYPE_B);
vslice->ref_pic_list0[0] = vpic->reference_frames[0];
}
if (pic->nb_refs >= 2) {
- // Forward reference for B frame.
+ // Forward reference for B-frame.
av_assert0(pic->type == PICTURE_TYPE_B);
vslice->num_ref_idx_l1_active_minus1 = 0;
priv->fixed_qp_b = priv->fixed_qp_p;
av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
- "%d / %d / %d for IDR / P / B frames.\n",
+ "%d / %d / %d for IDR- / P- / B-frames.\n",
priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
return 0;
}
offsetof(VAAPIEncodeH265Options, x))
#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
static const AVOption vaapi_encode_h265_options[] = {
- { "qp", "Constant QP (for P frames; scaled by qfactor/qoffset for I/B)",
+ { "qp", "Constant QP (for P-frames; scaled by qfactor/qoffset for I/B)",
OFFSET(qp), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, 52, FLAGS },
{ NULL },
};
"Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
"LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
"Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
- "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
+ "DQuant=%i, Quantizer mode=%i, Max B-frames=%i\n",
v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
v->rangered, v->vstransform, v->overlap, v->resync_marker,
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
- /* Hopefully this is correct for P frames */
+ /* Hopefully this is correct for P-frames */
v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
- /* Hopefully this is correct for P frames */
+ /* Hopefully this is correct for P-frames */
v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
} else if (v->fcm == ILACE_FRAME) { // frame interlaced
};
//@}
-/** MV modes for P frames */
+/** MV modes for P-frames */
//@{
enum MVModes {
MV_PMODE_1MV_HPEL_BILIN,
};
//@}
-/** @name MV types for B frames */
+/** @name MV types for B-frames */
//@{
enum BMVTypes {
BMV_TYPE_BACKWARD,
};
//@}
-/** @name Block types for P/B frames */
+/** @name Block types for P/B-frames */
//@{
enum TransformTypes {
TT_8X8,
/** Advanced Profile */
//@{
- int level; ///< 3bits, for Advanced/Simple Profile, provided by TS layer
- int chromaformat; ///< 2bits, 2=4:2:0, only defined
+ int level; ///< 3 bits, for Advanced/Simple Profile, provided by TS layer
+ int chromaformat; ///< 2 bits, 2=4:2:0, only defined
int postprocflag; ///< Per-frame processing suggestion flag present
int broadcast; ///< TFF/RFF present
int interlace; ///< Progressive/interlaced (RPTFTM syntax element)
int tfcntrflag; ///< TFCNTR present
int panscanflag; ///< NUMPANSCANWIN, TOPLEFT{X,Y}, BOTRIGHT{X,Y} present
int refdist_flag; ///< REFDIST syntax element present in II, IP, PI or PP field picture headers
- int extended_dmv; ///< Additional extended dmv range at P/B frame-level
- int color_prim; ///< 8bits, chroma coordinates of the color primaries
- int transfer_char; ///< 8bits, Opto-electronic transfer characteristics
- int matrix_coef; ///< 8bits, Color primaries->YCbCr transform matrix
+ int extended_dmv; ///< Additional extended dmv range at P/B-frame-level
+ int color_prim; ///< 8 bits, chroma coordinates of the color primaries
+ int transfer_char; ///< 8 bits, Opto-electronic transfer characteristics
+ int matrix_coef; ///< 8 bits, Color primaries->YCbCr transform matrix
int hrd_param_flag; ///< Presence of Hypothetical Reference
///< Decoder parameters
int psf; ///< Progressive Segmented Frame
* TODO: choose between ints, uint8_ts and monobit flags
*/
//@{
- int profile; ///< 2bits, Profile
- int frmrtq_postproc; ///< 3bits,
- int bitrtq_postproc; ///< 5bits, quantized framerate-based postprocessing strength
+ int profile; ///< 2 bits, Profile
+ int frmrtq_postproc; ///< 3 bits
+ int bitrtq_postproc; ///< 5 bits, quantized framerate-based postprocessing strength
int fastuvmc; ///< Rounding of qpel vector to hpel ? (not in Simple)
int extended_mv; ///< Ext MV in P/B (not in Simple)
- int dquant; ///< How qscale varies with MBs, 2bits (not in Simple)
+ int dquant; ///< How qscale varies with MBs, 2 bits (not in Simple)
int vstransform; ///< variable-size [48]x[48] transform type + info
int overlap; ///< overlapped transforms in use
- int quantizer_mode; ///< 2bits, quantizer mode used for sequence, see QUANT_*
+ int quantizer_mode; ///< 2 bits, quantizer mode used for sequence, see QUANT_*
int finterpflag; ///< INTERPFRM present
//@}
/** Frame decoding info for all profiles */
//@{
- uint8_t mv_mode; ///< MV coding monde
- uint8_t mv_mode2; ///< Secondary MV coding mode (B frames)
+ uint8_t mv_mode; ///< MV coding mode
+ uint8_t mv_mode2; ///< Secondary MV coding mode (B-frames)
int k_x; ///< Number of bits for MVs (depends on MV range)
int k_y; ///< Number of bits for MVs (depends on MV range)
int range_x, range_y; ///< MV range
int idx_mbmode = 0, mvbp;
int stride_y, fieldtx;
- mquant = v->pq; /* Loosy initialization */
+ mquant = v->pq; /* Lossy initialization */
if (v->skip_is_raw)
skipped = get_bits1(gb);
int block_cbp = 0, pat, block_tt = 0;
int idx_mbmode = 0;
- mquant = v->pq; /* Loosy initialization */
+ mquant = v->pq; /* Lossy initialization */
idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
if (idx_mbmode <= 1) { // intra MB
int bmvtype = BMV_TYPE_BACKWARD;
int idx_mbmode, interpmvp;
- mquant = v->pq; /* Loosy initialization */
+ mquant = v->pq; /* Lossy initialization */
s->mb_intra = 0;
idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
uint8_t *coded_val;
int mb_pos;
- /* select codingmode used for VLC tables selection */
+ /* select coding mode used for VLC tables selection */
switch (v->y_ac_table_index) {
case 0:
v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
int mqdiff;
GetBitContext *gb = &s->gb;
- /* select codingmode used for VLC tables selection */
+ /* select coding mode used for VLC tables selection */
switch (v->y_ac_table_index) {
case 0:
v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
MpegEncContext *s = &v->s;
int apply_loop_filter;
- /* select codingmode used for VLC tables selection */
+ /* select coding mode used for VLC tables selection */
switch (v->c_ac_table_index) {
case 0:
v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
{
MpegEncContext *s = &v->s;
- /* select codingmode used for VLC tables selection */
+ /* select coding mode used for VLC tables selection */
switch (v->c_ac_table_index) {
case 0:
v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
mx = s->mv[dir][0][0];
my = s->mv[dir][0][1];
- // store motion vectors for further use in B frames
+ // store motion vectors for further use in B-frames
if (s->pict_type == AV_PICTURE_TYPE_P) {
for (i = 0; i < 4; i++) {
s->current_picture.motion_val[1][s->block_index[i] + v->blocks_off][0] = mx;
if (s->avctx->flags & AV_CODEC_FLAG_GRAY)
return;
- /* Chroma MC always uses qpel blilinear */
+ /* Chroma MC always uses qpel bilinear */
uvmx = (uvmx & 3) << 1;
uvmy = (uvmy & 3) << 1;
if (!v->rnd) {
int A[2], B[2], C[2];
int px = 0, py = 0;
int a_valid = 0, b_valid = 0, c_valid = 0;
- int field_a, field_b, field_c; // 0: same, 1: opposit
+ int field_a, field_b, field_c; // 0: same, 1: opposite
int total_valid, num_samefield, num_oppfield;
int pos_c, pos_b, n_adj;
/** Initialize a VC1/WMV3 decoder
* @todo TODO: Handle VC-1 IDUs (Transport level?)
- * @todo TODO: Decypher remaining bits in extra_data
+ * @todo TODO: Decipher remaining bits in extra_data
*/
static av_cold int vc1_decode_init(AVCodecContext *avctx)
{
CFMutableDictionaryRef io_surface_properties;
CFNumberRef cv_pix_fmt;
- /* Each VCL NAL in the bistream sent to the decoder
+ /* Each VCL NAL in the bitstream sent to the decoder
* is preceded by a 4 bytes length header.
* Change the avcC atom header if needed, to signal headers of 4 bytes. */
if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
// kCVPixelFormatType_420YpCbCr8Planar;
- /* Each VCL NAL in the bistream sent to the decoder
+ /* Each VCL NAL in the bitstream sent to the decoder
* is preceded by a 4 bytes length header.
* Change the avcC atom header if needed, to signal headers of 4 bytes. */
if (avctx->extradata_size >= 4 && (avctx->extradata[4] & 0x03) != 0x03) {
* display preemption).
*
* @note get_format() must return AV_PIX_FMT_VDPAU if this function completes
- * succesfully.
+ * successfully.
*
* @param avctx decoding context whose get_format() callback is invoked
* @param device VDPAU device handle to use for hardware acceleration
break;
#endif
case FF_PROFILE_H264_HIGH_10:
- /* XXX: High 10 can be treated as High so long as only 8-bits per
- * formats are supported. */
+ /* XXX: High 10 can be treated as High so long as only 8 bits per
+ * format are supported. */
profile = VDP_DECODER_PROFILE_H264_HIGH;
break;
#ifdef VDP_DECODER_PROFILE_H264_HIGH_444_PREDICTIVE
/*
- * Copyright (C) 2003-2004 the ffmpeg project
+ * Copyright (C) 2003-2004 The FFmpeg project
*
* This file is part of Libav.
*
int num_coeffs = s->num_coded_frags[plane][coeff_index];
int16_t *dct_tokens = s->dct_tokens[plane][coeff_index];
- /* local references to structure members to avoid repeated deferences */
+ /* local references to structure members to avoid repeated dereferences */
int *coded_fragment_list = s->coded_fragment_list[plane];
Vp3Fragment *all_fragments = s->all_fragments;
VLC_TYPE(*vlc_table)[2] = table->table;
if (num_coeffs < 0)
av_log(s->avctx, AV_LOG_ERROR,
- "Invalid number of coefficents at level %d\n", coeff_index);
+ "Invalid number of coefficients at level %d\n", coeff_index);
if (eob_run > num_coeffs) {
coeff_i =
if (blocks_ended > s->num_coded_frags[plane][coeff_index])
av_log(s->avctx, AV_LOG_ERROR, "More blocks ended than coded!\n");
- // decrement the number of blocks that have higher coeffecients for each
+ // decrement the number of blocks that have higher coefficients for each
// EOB run at this level
if (blocks_ended)
for (i = coeff_index + 1; i < 64; i++)
c_tables[i] = &s->ac_vlc_4[ac_c_table];
}
- /* decode all AC coefficents */
+ /* decode all AC coefficients */
for (i = 1; i <= 63; i++) {
residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i,
0, residual_eob_run);
for (x = 0; x < width; x++) {
/* This code basically just deblocks on the edges of coded blocks.
* However, it has to be much more complicated because of the
- * braindamaged deblock ordering used in VP3/Theora. Order matters
+ * brain damaged deblock ordering used in VP3/Theora. Order matters
* because some pixels get filtered twice. */
if (s->all_fragments[fragment].coding_method != MODE_COPY) {
/* do not perform left edge filter for left columns frags */
/* Note, it is possible to implement all MC cases
* with put_no_rnd_pixels_l2 which would look more
* like the VP3 source but this would be slower as
- * put_no_rnd_pixels_tab is better optimzed */
+ * put_no_rnd_pixels_tab is better optimized */
if (motion_halfpel_index != 3) {
s->hdsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
output_plane + first_pixel,
/*
- * copyright (C) 2003 the ffmpeg project
+ * copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
- * Copyright (C) 2004 the ffmpeg project
+ * Copyright (C) 2004 The FFmpeg project
*
* This file is part of Libav.
*
/**
* These are all of the updatable probabilities for binary decisions.
- * They are only implictly reset on keyframes, making it quite likely
+ * They are only implicitly reset on keyframes, making it quite likely
* for an interframe to desync if a prior frame's header was corrupt
* or missing outright!
*/
/**
* This describes the macroblock memory layout.
* 0 -> Only width+height*2+1 macroblocks allocated (frame/single thread).
- * 1 -> Macroblocks for entire frame alloced (sliced thread).
+ * 1 -> Macroblocks for entire frame allocated (sliced thread).
*/
int mb_layout;
*/
// FIXME(rbultje) maybe replace left/top pointers with HAVE_TOP/
// HAVE_LEFT/HAVE_TOPRIGHT flags instead, and then handle it in-place?
- // also needs to fit in with what h264/vp8/etc do
+ // also needs to fit in with what H.264/VP8/etc do
void (*intra_pred[N_TXFM_SIZES][N_INTRA_PRED_MODES])(uint8_t *dst,
ptrdiff_t stride,
const uint8_t *left,
/*
* Westwood Studios VQA Video Decoder
- * Copyright (C) 2003 the ffmpeg project
+ * Copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
* @param version 0 for wma1,2 1 for wmapro
* @param ptr output buffer
* @param offset offset in the output buffer
- * @param num_coefs number of input coefficents
+ * @param num_coefs number of input coefficients
* @param block_len input buffer length (2^n)
* @param frame_len_bits number of bits for escaped run codes
* @param coef_nb_bits number of bits for escaped level codes
s->avctx = avctx;
- /* extract flag infos */
+ /* extract flag info */
flags2 = 0;
extradata = avctx->extradata;
if (avctx->codec->id == AV_CODEC_ID_WMAV1 && avctx->extradata_size >= 4)
av_log(s->avctx, AV_LOG_ERROR, "Exponent vlc invalid\n");
return -1;
}
- /* NOTE: this offset is the same as MPEG4 AAC ! */
+ /* NOTE: this offset is the same as MPEG-4 AAC! */
last_exp += code - 60;
if ((unsigned) last_exp + 60 >= FF_ARRAY_ELEMS(pow_tab)) {
av_log(s->avctx, AV_LOG_ERROR, "Exponent out of range: %d\n",
/**
* @return 0 if OK. 1 if last block of frame. return -1 if
- * unrecorrable error.
+ * unrecoverable error.
*/
static int wma_decode_block(WMACodecContext *s)
{
return AVERROR(EINVAL);
}
- /* extract flag infos */
+ /* extract flag info */
flags1 = 0;
flags2 = 1;
if (avctx->codec->id == AV_CODEC_ID_WMAV1) {
uint32_t frame_num; ///< current frame number (not used for decoding)
GetBitContext gb; ///< bitstream reader context
int buf_bit_size; ///< buffer size in bits
- int16_t *samples_16[WMALL_MAX_CHANNELS]; ///< current samplebuffer pointer (16-bit)
- int32_t *samples_32[WMALL_MAX_CHANNELS]; ///< current samplebuffer pointer (24-bit)
+ int16_t *samples_16[WMALL_MAX_CHANNELS]; ///< current sample buffer pointer (16-bit)
+ int32_t *samples_32[WMALL_MAX_CHANNELS]; ///< current sample buffer pointer (24-bit)
uint8_t drc_gain; ///< gain for the DRC tool
int8_t skip_frame; ///< skip output step
int8_t parsed_all_subframes; ///< all subframes decoded?
/* parse packet header */
init_get_bits(gb, buf, s->buf_bit_size);
packet_sequence_number = get_bits(gb, 4);
- skip_bits(gb, 1); // Skip seekable_frame_in_packet, currently ununused
+ skip_bits(gb, 1); // Skip seekable_frame_in_packet, currently unused
spliced_packet = get_bits1(gb);
if (spliced_packet)
avpriv_request_sample(avctx, "Bitstream splicing");
int buflen;
/** when the frame data does not need to be concatenated, the input buffer
- is resetted and additional bits from the previous frame are copyed
+ is reset and additional bits from the previous frame are copied
and skipped later so that a fast byte copy is possible */
if (!append) {
/**
* @}
*
- * Generate a random number from frame_cntr and block_idx, which will lief
+ * Generate a random number from frame_cntr and block_idx, which will live
* in the range [0, 1000 - block_size] (so it can be used as an index in a
* table of size 1000 of which you want to read block_size entries).
*
/* Pitch is given per block. Per-block pitches are encoded as an
* absolute value for the first block, and then delta values
* relative to this value) for all subsequent blocks. The scale of
- * this pitch value is semi-logaritmic compared to its use in the
+ * this pitch value is semi-logarithmic compared to its use in the
* decoder, so we convert it to normal scale also. */
int block_pitch,
t1 = (s->block_conv_table[1] - s->block_conv_table[0]) << 2,
put_bits(&s->pb, 5, s->qscale);
s->dc_table_index = 1;
- s->mv_table_index = 1; /* only if P frame */
+ s->mv_table_index = 1; /* only if P-frame */
s->per_mb_rl_table = 0;
s->mspel = 0;
w->per_mb_abt = 0;
"sub "tmp" , "low" \n\t"
#else /* HAVE_FAST_CMOV */
#define BRANCHLESS_GET_CABAC_UPDATE(ret, retq, low, range, tmp) \
-/* P4 Prescott has crappy cmov,sbb,64bit shift so avoid them */ \
+/* P4 Prescott has crappy cmov,sbb,64-bit shift so avoid them */ \
"sub "low" , "tmp" \n\t"\
"sar $31 , "tmp" \n\t"\
"sub %%ecx , "range" \n\t"\
;******************************************************************************
-;* MMX/SSSE3-optimized functions for H264 chroma MC
+;* MMX/SSSE3-optimized functions for H.264 chroma MC
;* Copyright (c) 2005 Zoltan Hidvegi <hzoli -a- hzoli -d- com>,
;* 2005-2008 Loren Merritt
;*
/**
* @file
- * H.264 / AVC / MPEG4 part10 codec.
+ * H.264 / AVC / MPEG-4 part10 codec.
* non-MMX i386-specific optimizations for H.264
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#endif
// using regr as temporary and for the output result
-// first argument is unmodifed and second is trashed
+// first argument is unmodified and second is trashed
// regfe is supposed to contain 0xfefefefefefefefe
#define PAVGB_MMX_NO_RND(rega, regb, regr, regfe) \
"movq "#rega", "#regr" \n\t" \
/*
* Optimized for ia32 CPUs by Nick Kurshev <nickols_k@mail.ru>
- * h263, mpeg1, mpeg2 dequantizer & draw_edges by Michael Niedermayer <michaelni@gmx.at>
+ * H.263, MPEG-1, MPEG-2 dequantizer & draw_edges by Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of Libav.
*
block0 = block[0] * s->y_dc_scale;
else
block0 = block[0] * s->c_dc_scale;
- /* XXX: only mpeg1 */
+ /* XXX: only MPEG-1 */
quant_matrix = s->intra_matrix;
__asm__ volatile(
"pcmpeqw %%mm7, %%mm7 \n\t"
FILTER_SSSE3 put
FILTER_SSSE3 avg
-; %1=5bits weights?, %2=dst %3=src1 %4=src3 %5=stride if sse2
+; %1=5-bit weights?, %2=dst %3=src1 %4=src3 %5=stride if SSE2
%macro RV40_WCORE 4-5
movh m4, [%3 + r6 + 0]
movh m5, [%4 + r6 + 0]
%if %0 == 4
%define OFFSET r6 + mmsize / 2
%else
- ; 8x8 block and sse2, stride was provided
+ ; 8x8 block and SSE2, stride was provided
%define OFFSET r6
add r6, r5
%endif
movh m7, [%4 + OFFSET]
%if %1 == 0
- ; 14bits weights
+ ; 14-bit weights
punpcklbw m4, m0
punpcklbw m5, m0
punpcklbw m6, m0
paddw m4, m5
paddw m6, m7
%else
- ; 5bits weights
+ ; 5-bit weights
%if cpuflag(ssse3)
punpcklbw m4, m5
punpcklbw m6, m7
packuswb m4, m6
%if %0 == 5
- ; Only called for 8x8 blocks and sse2
+ ; Only called for 8x8 blocks and SSE2
sub r6, r5
movh [%2 + r6], m4
add r6, r5
"movq %%mm"#R1", "#OFF"(%1) \n\t" \
"add %2, %0 \n\t"
-/** Sacrifying mm6 allows to pipeline loads from src */
+/** Sacrificing mm6 allows to pipeline loads from src */
static void vc1_put_ver_16b_shift2_mmx(int16_t *dst,
const uint8_t *src, x86_reg stride,
int rnd, int64_t shift)
/**
* Purely vertical or horizontal 1/2 shift interpolation.
- * Sacrify mm6 for *9 factor.
+ * Sacrifice mm6 for *9 factor.
*/
#define VC1_SHIFT2(OP, OPNAME)\
static void OPNAME ## vc1_shift2_mmx(uint8_t *dst, const uint8_t *src,\
/**
* Core of the 1/4 and 3/4 shift bicubic interpolation.
*
- * @param UNPACK Macro unpacking arguments from 8 to 16bits (can be empty).
+ * @param UNPACK Macro unpacking arguments from 8 to 16 bits (can be empty).
* @param MOVQ "movd 1" or "movq 2", if data read is already unpacked.
* @param A1 Address of 1st tap (beware of unpacked/packed).
* @param A2 Address of 2nd tap
"paddw %%mm2, %%mm4 \n\t" /* 4,53,18,-3 */
/**
- * Macro to build the vertical 16bits version of vc1_put_shift[13].
+ * Macro to build the vertical 16 bits version of vc1_put_shift[13].
* Here, offset=src_stride. Parameters passed A1 to A4 must use
* %3 (src_stride) and %4 (3*src_stride).
*
}
/**
- * Macro to build the horizontal 16bits version of vc1_put_shift[13].
- * Here, offset=16bits, so parameters passed A1 to A4 should be simple.
+ * Macro to build the horizontal 16 bits version of vc1_put_shift[13].
+ * Here, offset=16 bits, so parameters passed A1 to A4 should be simple.
*
* @param NAME Either 1 or 3
* @see MSPEL_FILTER13_CORE for information on A1->A4
}
/**
- * Macro to build the 8bits, any direction, version of vc1_put_shift[13].
+ * Macro to build the 8 bits, any direction, version of vc1_put_shift[13].
* Here, offset=src_stride. Parameters passed A1 to A4 must use
* %3 (offset) and %4 (3*offset).
*
/*
* Wing Commander/Xan Video Decoder
- * Copyright (C) 2003 the ffmpeg project
+ * Copyright (C) 2003 The FFmpeg project
*
* This file is part of Libav.
*
return AVERROR_INVALIDDATA;
}
- if (c->comp == 0) { //Uncompressed data
+ if (c->comp == 0) { // uncompressed data
if (c->decomp_size < len) {
av_log(avctx, AV_LOG_ERROR, "Buffer too small\n");
return AVERROR_INVALIDDATA;
Display *dpy; /**< X11 display from which x11grab grabs frames */
XImage *image; /**< X11 image holding the grab */
int use_shm; /**< !0 when using XShm extension */
- XShmSegmentInfo shminfo; /**< When using XShm, keeps track of XShm infos */
+ XShmSegmentInfo shminfo; /**< When using XShm, keeps track of XShm info */
int draw_mouse; /**< Set by a private option. */
int follow_mouse; /**< Set by a private option. */
int show_region; /**< set by a private option. */
* is not registered.
*
* @param filter the filter to register
- * @return 0 if the registration was succesfull, a negative value
+ * @return 0 if the registration was successful, a negative value
* otherwise
*/
int avfilter_register(AVFilter *filter);
typedef struct InterlaceContext {
const AVClass *class;
enum ScanMode scan; // top or bottom field first scanning
- int lowpass; // enable or disable low pass filterning
+ int lowpass; // enable or disable low pass filtering
AVFrame *cur, *next; // the two frames from which the new one is obtained
- int got_output; // signal an output frame is reday to request_frame()
+ int got_output; // signal an output frame is ready to request_frame()
void (*lowpass_line)(uint8_t *dstp, ptrdiff_t linesize, const uint8_t *srcp,
const uint8_t *srcp_above, const uint8_t *srcp_below);
} InterlaceContext;
pthread_t *workers;
avfilter_action_func *func;
- /* per-execute perameters */
+ /* per-execute parameters */
AVFilterContext *ctx;
void *arg;
int *rets;
"INTERLACED", ///< tell if the current frame is interlaced
"N", ///< frame / sample number (starting at zero)
"PHI", ///< golden ratio
- "PI", ///< greek pi
+ "PI", ///< Greek pi
"PREV_INPTS", ///< previous input PTS
"PREV_OUTPTS", ///< previous output PTS
"PTS", ///< original pts in the file of the frame
*
* Apply a boxblur debanding algorithm (based on the gradfun2db
* AviSynth filter by prunedtree).
- * Foreach pixel, if it's within threshold of the blurred value, make it closer.
- * So now we have a smoothed and higher bitdepth version of all the shallow
- * gradients, while leaving detailed areas untouched.
+ * For each pixel, if it is within the threshold of the blurred value, make it
+ * closer. So now we have a smoothed and higher bitdepth version of all the
+ * shallow gradients, while leaving detailed areas untouched.
* Dither it back to 8bit.
*/
int w, int h, int sstride, int dstride,
int16_t *spatial, int16_t *temporal, int depth)
{
- // FIXME: For 16bit depth, frame_ant could be a pointer to the previous
+ // FIXME: For 16-bit depth, frame_ant could be a pointer to the previous
// filtered frame rather than a separate buffer.
long x, y;
uint16_t *frame_ant = *frame_ant_ptr;
typedef struct OverlayContext {
const AVClass *class;
- int x, y; ///< position of overlayed picture
+ int x, y; ///< position of overlaid picture
int max_plane_step[4]; ///< steps per pixel for each plane
int hsub, vsub; ///< chroma subsampling values
static const char *const var_names[] = {
"E", ///< Euler number
"PHI", ///< golden ratio
- "PI", ///< greek pi
+ "PI", ///< Greek pi
"TB", ///< timebase
if (val <= 0)
return val;
- //FIXME change API to not requre this red tape
+ //FIXME change API to not require this red tape
if (val == 1 && !yadif->next) {
if ((ret = ff_request_frame(link->src->inputs[0])) < 0)
return ret;
/*
* 4X Technologies .4xm File Demuxer (no muxer)
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
if (p->buf_size <= 2048+212)
return 0;
- /* Magic is '00 08 00 00' in Little Endian*/
+ /* Magic is '00 08 00 00' in little-endian*/
if (AV_RL32(p->buf)==0x800) {
int bsm_s, bsm_e, inb_s, inb_e, ch;
ch = p->buf[264];
/*
* amr file format
- * Copyright (c) 2001 ffmpeg project
+ * Copyright (c) 2001 FFmpeg project
*
* This file is part of Libav.
*
return AVERROR(EIO);
}
- // FIXME this is wrong, this should rather be in a AVParset
+ // FIXME this is wrong, this should rather be in an AVParser
toc = avio_r8(s->pb);
mode = (toc >> 3) & 0x0F;
* invalid if broadcasting (could be ignored) */
uint32_t preroll; /**< timestamp of the first packet, in milliseconds
* if nonzero - subtract from time */
- uint32_t ignore; ///< preroll is 64bit - but let's just ignore it
+ uint32_t ignore; ///< preroll is 64 bits - but let's just ignore it
uint32_t flags; /**< 0x01 - broadcast
* 0x02 - seekable
* rest is reserved should be 0 */
int stream_index; // from packet header, for the subpayload case
- // packet parameteres
- uint64_t sub_header_offset; // offset of subplayload header
+ // packet parameters
+ uint64_t sub_header_offset; // offset of subpayload header
int64_t sub_dts;
uint8_t dts_delta; // for subpayloads
uint32_t packet_size_internal; // packet size stored inside ASFPacket, can be 0
int ret;
int skip = 0;
- // if replicated lenght is 1, subpayloads are present
+ // if replicated length is 1, subpayloads are present
if (asf->rep_data_len == 1) {
asf->sub_left = 1;
asf->state = READ_MULTI_SUB;
uint32_t seqno;
int is_streamed;
ASFStream streams[128]; ///< it's max number and it's not that big
- /* non streamed additonnal info */
+ /* non-streamed additional info */
uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting
uint64_t duration; ///< in ms
/* packet filling */
avio_wl16(pb, 0);
end_header(pb, hpos);
- /* title and other infos */
+ /* title and other info */
if (has_title) {
int len;
uint8_t *buf;
int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len)
{
if (len > 6) {
- /* check for h264 start code */
+ /* check for H.264 start code */
if (AV_RB32(data) == 0x00000001 ||
AV_RB24(data) == 0x000001) {
uint8_t *buf=NULL, *end, *start;
* @param ic the context to analyze
* @param index the index to print, if you have multiple inputs or outputs
* @param url the URL to print, such as source or destination file
- * @param is_output whether the context is input or ouput
+ * @param is_output whether the context is input or output
*/
void av_dump_format(AVFormatContext *ic,
int index,
st->start_time = 0;
avio_rl32(pb); /* buffer size */
avio_rl32(pb); /* quality */
- ast->sample_size = avio_rl32(pb); /* sample ssize */
+ ast->sample_size = avio_rl32(pb); /* sample size */
ast->cum_len *= FFMAX(1, ast->sample_size);
av_log(s, AV_LOG_TRACE, "%"PRIu32" %"PRIu32" %d\n",
ast->rate, ast->scale, ast->sample_size);
int avio_put_str16be(AVIOContext *s, const char *str);
/**
- * Passing this as the "whence" parameter to a seek function causes it to
+ * ORing this as the "whence" parameter to a seek function causes it to
* return the filesize without seeking anywhere. Supporting this is optional.
* If it is not supported then the seek function will return <0.
*/
#define AVSEEK_SIZE 0x10000
/**
- * Oring this flag as into the "whence" parameter to a seek function causes it to
- * seek by any means (like reopening and linear reading) or other normally unreasonble
- * means that can be extreemly slow.
+ * Passing this flag as the "whence" parameter to a seek function causes it to
+ * seek by any means (like reopening and linear reading) or other normally unreasonable
+ * means that can be extremely slow.
* This may be ignored by the seek code.
*/
#define AVSEEK_FORCE 0x20000
/*
* AviSynth/AvxSynth support
- * Copyright (c) 2012 AvxSynth Team.
+ * Copyright (c) 2012 AvxSynth Team
*
* This file is part of Libav.
*
*/
enum AVLangCodespace {
AV_LANG_ISO639_2_BIBL, /** 3-char bibliographic language codes as per ISO-IEC 639-2 */
- AV_LANG_ISO639_2_TERM, /** 3-char terminologic language codes as per ISO-IEC 639-2 */
+ AV_LANG_ISO639_2_TERM, /** 3-char terminological language codes as per ISO-IEC 639-2 */
AV_LANG_ISO639_1 /** 2-char code of language as per ISO/IEC 639-1 */
};
pkt->pts = bink->audio_pts[bink->current_track - 1];
/* Each audio packet reports the number of decompressed samples
- (in bytes). We use this value to calcuate the audio PTS */
+ (in bytes). We use this value to calculate the audio PTS */
if (pkt->size >= 4)
bink->audio_pts[bink->current_track -1] +=
AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codecpar->channels);
/*
* Discworld II BMV demuxer
- * Copyright (c) 2011 Konstantin Shishkov.
+ * Copyright (c) 2011 Konstantin Shishkov
*
* This file is part of Libav.
*
dump_paramchange(ctx, &sd);
break;
case AV_PKT_DATA_H263_MB_INFO:
- av_log(ctx, AV_LOG_INFO, "h263 macroblock info");
+ av_log(ctx, AV_LOG_INFO, "H.263 macroblock info");
break;
case AV_PKT_DATA_REPLAYGAIN:
av_log(ctx, AV_LOG_INFO, "replaygain: ");
/*
* There's a couple of assumptions being made here:
- * 1. By default we silence erroneous (0x8000/16bit 0x800/12bit) audio samples.
+ * 1. By default we silence erroneous (0x8000/16-bit 0x800/12-bit) audio samples.
* We can pass them upwards when libavcodec will be ready to deal with them.
* 2. We don't do software emphasis.
- * 3. Audio is always returned as 16bit linear samples: 12bit nonlinear samples
- * are converted into 16bit linear ones.
+ * 3. Audio is always returned as 16-bit linear samples: 12-bit nonlinear samples
+ * are converted into 16-bit linear ones.
*/
static int dv_extract_audio(uint8_t *frame, uint8_t **ppcm,
const AVDVProfile *sys)
smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
freq = as_pack[4] >> 3 & 0x07; /* 0 - 48kHz, 1 - 44,1kHz, 2 - 32kHz */
- quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
+ quant = as_pack[4] & 0x07; /* 0 - 16-bit linear, 1 - 12-bit nonlinear */
if (quant > 1)
return -1; /* unsupported quantization */
for (i = 0; i < sys->difseg_size; i++) {
frame += 6 * 80; /* skip DIF segment header */
if (quant == 1 && i == half_ch) {
- /* next stereo channel (12bit mode only) */
+ /* next stereo channel (12-bit mode only) */
pcm = ppcm[ipcm++];
if (!pcm)
break;
/* for each AV sequence */
for (j = 0; j < 9; j++) {
for (d = 8; d < 80; d += 2) {
- if (quant == 0) { /* 16bit quantization */
+ if (quant == 0) { /* 16-bit quantization */
of = sys->audio_shuffle[i][j] +
(d - 8) / 2 * sys->audio_stride;
if (of * 2 >= size)
if (pcm[of * 2 + 1] == 0x80 && pcm[of * 2] == 0x00)
pcm[of * 2 + 1] = 0;
- } else { /* 12bit quantization */
+ } else { /* 12-bit quantization */
lc = ((uint16_t)frame[d] << 4) |
((uint16_t)frame[d + 2] >> 4);
rc = ((uint16_t)frame[d + 1] << 4) |
smpls = as_pack[1] & 0x3f; /* samples in this frame - min. samples */
freq = as_pack[4] >> 3 & 0x07; /* 0 - 48kHz, 1 - 44,1kHz, 2 - 32kHz */
stype = as_pack[3] & 0x1f; /* 0 - 2CH, 2 - 4CH, 3 - 8CH */
- quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */
+ quant = as_pack[4] & 0x07; /* 0 - 16-bit linear, 1 - 12-bit nonlinear */
if (freq >= FF_ARRAY_ELEMS(dv_audio_frequency)) {
av_log(c->fctx, AV_LOG_ERROR,
#include "libavutil/fifo.h"
#include "libavutil/mathematics.h"
-#define MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
+#define MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32-bit audio
struct DVMuxContext {
const AVDVProfile* sys; /* current DV profile, e.g.: 525/60, 625/50 */
buf[4] = (1 << 7) | /* emphasis: 1 -- off */
(0 << 6) | /* emphasis time constant: 0 -- reserved */
(0 << 3) | /* frequency: 0 -- 48kHz, 1 -- 44,1kHz, 2 -- 32kHz */
- 0; /* quantization: 0 -- 16bit linear, 1 -- 12bit nonlinear */
+ 0; /* quantization: 0 -- 16-bit linear, 1 -- 12-bit nonlinear */
va_end(ap);
break;
case dv_audio_control:
/* Electronic Arts Multimedia File Demuxer
- * Copyright (c) 2004 The ffmpeg Project
+ * Copyright (c) 2004 The FFmpeg project
* Copyright (c) 2006-2008 Peter Ross
*
* This file is part of Libav.
/*
* FLI/FLC Animation File Demuxer
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
*
* This demuxer will generate a 1 byte extradata for VP6F content.
* It is composed of:
- * - upper 4bits: difference between encoded width and visible width
- * - lower 4bits: difference between encoded height and visible height
+ * - upper 4 bits: difference between encoded width and visible width
+ * - lower 4 bits: difference between encoded height and visible height
*
* This file is part of Libav.
*
int pframes;
int bframes;
int p_per_gop;
- int b_per_i_or_p; ///< number of B frames per I frame or P frame
+ int b_per_i_or_p; ///< number of B-frames per I-frame or P-frame
int first_gop_closed;
unsigned order; ///< interleaving order
} GXFStreamContext;
/*
* Initialize this field with an invalid value which can be used to detect
- * whether we didn't see any VUI (in wich case it should be reset to zero).
+ * whether we didn't see any VUI (in which case it should be reset to zero).
*/
hvcc->min_spatial_segmentation_idc = MAX_SPATIAL_SEGMENTATION + 1;
}
/**
* Send a new HTTP request, reusing the old connection.
*
- * @param h pointer to the ressource
+ * @param h pointer to the resource
* @param uri uri used to perform the request
* @return a negative value if an error condition occurred, 0
* otherwise
*/
char realm[200];
/**
- * The parameters specifiec to digest authentication.
+ * The parameters specific to digest authentication.
*/
DigestParams digest_params;
/**
len = avio_close_dyn_buf(dyn_buf, &pb);
avio_wb32(avioc, tag);
- /* ID3v2.3 frame size is not synchsafe */
+ /* ID3v2.3 frame size is not sync-safe */
if (id3->version == 3)
avio_wb32(avioc, len);
else
/*
* id Quake II CIN File Demuxer
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
* types. However, a CIN file does start with 5 32-bit numbers that
* specify audio and video parameters. This demuxer gets around the lack
* of file signature by performing sanity checks on those parameters.
- * Probabalistically, this is a reasonable solution since the number of
+ * Probabilistically, this is a reasonable solution since the number of
* valid combinations of the 5 parameters is a very small subset of the
* total 160-bit number space.
*
/*
* id RoQ (.roq) File Demuxer
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
compression = avio_r8(pb);
}
if (data_size >= 16) {
- avio_skip(pb, 3); // paddding, transparent
+ avio_skip(pb, 3); // padding, transparent
st->sample_aspect_ratio.num = avio_r8(pb);
st->sample_aspect_ratio.den = avio_r8(pb);
}
/**
* A wrapper around AVFormatContext.io_close that should be used
- * intead of calling the pointer directly.
+ * instead of calling the pointer directly.
*/
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb);
/*
* Interplay MVE File Demuxer
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
{ AV_CODEC_ID_HEVC , 0x23 },
{ AV_CODEC_ID_AAC , 0x40 },
{ AV_CODEC_ID_MP4ALS , 0x40 }, /* 14496-3 ALS */
- { AV_CODEC_ID_MPEG2VIDEO , 0x61 }, /* MPEG2 Main */
- { AV_CODEC_ID_MPEG2VIDEO , 0x60 }, /* MPEG2 Simple */
- { AV_CODEC_ID_MPEG2VIDEO , 0x62 }, /* MPEG2 SNR */
- { AV_CODEC_ID_MPEG2VIDEO , 0x63 }, /* MPEG2 Spatial */
- { AV_CODEC_ID_MPEG2VIDEO , 0x64 }, /* MPEG2 High */
- { AV_CODEC_ID_MPEG2VIDEO , 0x65 }, /* MPEG2 422 */
- { AV_CODEC_ID_AAC , 0x66 }, /* MPEG2 AAC Main */
- { AV_CODEC_ID_AAC , 0x67 }, /* MPEG2 AAC Low */
- { AV_CODEC_ID_AAC , 0x68 }, /* MPEG2 AAC SSR */
+ { AV_CODEC_ID_MPEG2VIDEO , 0x61 }, /* MPEG-2 Main */
+ { AV_CODEC_ID_MPEG2VIDEO , 0x60 }, /* MPEG-2 Simple */
+ { AV_CODEC_ID_MPEG2VIDEO , 0x62 }, /* MPEG-2 SNR */
+ { AV_CODEC_ID_MPEG2VIDEO , 0x63 }, /* MPEG-2 Spatial */
+ { AV_CODEC_ID_MPEG2VIDEO , 0x64 }, /* MPEG-2 High */
+ { AV_CODEC_ID_MPEG2VIDEO , 0x65 }, /* MPEG-2 422 */
+ { AV_CODEC_ID_AAC , 0x66 }, /* MPEG-2 AAC Main */
+ { AV_CODEC_ID_AAC , 0x67 }, /* MPEG-2 AAC Low */
+ { AV_CODEC_ID_AAC , 0x68 }, /* MPEG-2 AAC SSR */
{ AV_CODEC_ID_MP3 , 0x69 }, /* 13818-3 */
{ AV_CODEC_ID_MP2 , 0x69 }, /* 11172-3 */
{ AV_CODEC_ID_MPEG1VIDEO , 0x6A }, /* 11172-2 */
{ AV_CODEC_ID_DIRAC , 0xA4 },
{ AV_CODEC_ID_AC3 , 0xA5 },
{ AV_CODEC_ID_DTS , 0xA9 }, /* mp4ra.org */
- { AV_CODEC_ID_TSCC2 , 0xD0 }, /* non standard, camtasia uses it */
- { AV_CODEC_ID_VORBIS , 0xDD }, /* non standard, gpac uses it */
- { AV_CODEC_ID_DVD_SUBTITLE, 0xE0 }, /* non standard, see unsupported-embedded-subs-2.mp4 */
+ { AV_CODEC_ID_TSCC2 , 0xD0 }, /* nonstandard, camtasia uses it */
+ { AV_CODEC_ID_VORBIS , 0xDD }, /* nonstandard, gpac uses it */
+ { AV_CODEC_ID_DVD_SUBTITLE, 0xE0 }, /* nonstandard, see unsupported-embedded-subs-2.mp4 */
{ AV_CODEC_ID_QCELP , 0xE1 },
{ AV_CODEC_ID_MPEG4SYSTEMS, 0x01 },
{ AV_CODEC_ID_MPEG4SYSTEMS, 0x02 },
const AVCodecTag ff_codec_movvideo_tags[] = {
/* { AV_CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
- { AV_CODEC_ID_RAWVIDEO, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */
- { AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') }, /* Uncompressed YUV422 */
- { AV_CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, /* YUV with alpha-channel (AVID Uncompressed) */
- { AV_CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */
- { AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', 's') }, /* same as 2vuy but byte swapped */
+ { AV_CODEC_ID_RAWVIDEO, MKTAG('r', 'a', 'w', ' ') }, /* uncompressed RGB */
+ { AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') }, /* uncompressed YUV422 */
+ { AV_CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, /* YUV with alpha-channel (AVID uncompressed) */
+ { AV_CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* uncompressed 8-bit 4:2:2 */
+ { AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', 's') }, /* same as 2VUY but byte-swapped */
{ AV_CODEC_ID_RAWVIDEO, MKTAG('L', '5', '5', '5') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('L', '5', '6', '5') },
{ AV_CODEC_ID_RAWVIDEO, MKTAG('R', '4', '2', '0') }, /* Radius DV YUV PAL */
{ AV_CODEC_ID_RAWVIDEO, MKTAG('R', '4', '1', '1') }, /* Radius DV YUV NTSC */
- { AV_CODEC_ID_R10K, MKTAG('R', '1', '0', 'k') }, /* UNCOMPRESSED 10BIT RGB */
- { AV_CODEC_ID_R10K, MKTAG('R', '1', '0', 'g') }, /* UNCOMPRESSED 10BIT RGB */
- { AV_CODEC_ID_R210, MKTAG('r', '2', '1', '0') }, /* UNCOMPRESSED 10BIT RGB */
- { AV_CODEC_ID_V210, MKTAG('v', '2', '1', '0') }, /* UNCOMPRESSED 10BIT 4:2:2 */
- { AV_CODEC_ID_V210, MKTAG('b', 'x', 'y', '2') }, /* BOXX 10BIT 4:2:2 */
- { AV_CODEC_ID_V410, MKTAG('v', '4', '1', '0') }, /* UNCOMPRESSED 10BIT 4:4:4 */
+ { AV_CODEC_ID_R10K, MKTAG('R', '1', '0', 'k') }, /* uncompressed 10-bit RGB */
+ { AV_CODEC_ID_R10K, MKTAG('R', '1', '0', 'g') }, /* uncompressed 10-bit RGB */
+ { AV_CODEC_ID_R210, MKTAG('r', '2', '1', '0') }, /* uncompressed 10-bit RGB */
+ { AV_CODEC_ID_V210, MKTAG('v', '2', '1', '0') }, /* uncompressed 10-bit 4:2:2 */
+ { AV_CODEC_ID_V210, MKTAG('b', 'x', 'y', '2') }, /* BOXX 10-bit 4:2:2 */
+ { AV_CODEC_ID_V410, MKTAG('v', '4', '1', '0') }, /* uncompressed 10-bit 4:4:4 */
{ AV_CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */
{ AV_CODEC_ID_MJPEG, MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */
{ AV_CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
{ AV_CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */
- { AV_CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */
- { AV_CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */
+ { AV_CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H.263 */
+ { AV_CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H.263 ?? works */
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */
{ AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */
{ AV_CODEC_ID_H264, MKTAG('a', 'i', '1', '5') }, /* AVC-Intra 100M 1080i50 */
{ AV_CODEC_ID_H264, MKTAG('a', 'i', '1', '6') }, /* AVC-Intra 100M 1080i60 */
{ AV_CODEC_ID_H264, MKTAG('A', 'V', 'i', 'n') }, /* AVC-Intra with implicit SPS/PPS */
- { AV_CODEC_ID_H264, MKTAG('a', 'i', 'v', 'x') }, /* XAVC 4:2:2 10bit */
+ { AV_CODEC_ID_H264, MKTAG('a', 'i', 'v', 'x') }, /* XAVC 10-bit 4:2:2 */
{ AV_CODEC_ID_H264, MKTAG('r', 'v', '6', '4') }, /* X-Com Radvision */
{ AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', '1', 'v', ' ') },
{ AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */
{ AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', '1', 'v') }, /* CoreMedia CMVideoCodecType */
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', '2', 'v', '1') }, /* Apple MPEG-2 Camcorder */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '1') }, /* MPEG2 HDV 720p30 */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 HDV 1080i60 */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* MPEG2 HDV 1080i50 */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '4') }, /* MPEG2 HDV 720p24 */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '5') }, /* MPEG2 HDV 720p25 */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '6') }, /* MPEG2 HDV 1080p24 */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '7') }, /* MPEG2 HDV 1080p25 */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '8') }, /* MPEG2 HDV 1080p30 */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '9') }, /* MPEG2 HDV 720p60 JVC */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', 'a') }, /* MPEG2 HDV 720p50 */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'n') }, /* MPEG2 IMX NTSC 525/60 40mb/s produced by FCP */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'p') }, /* MPEG2 IMX PAL 625/50 40mb/s produced by FCP */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */
- { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '1') }, /* MPEG-2 HDV 720p30 */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG-2 HDV 1080i60 */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* MPEG-2 HDV 1080i50 */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '4') }, /* MPEG-2 HDV 720p24 */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '5') }, /* MPEG-2 HDV 720p25 */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '6') }, /* MPEG-2 HDV 1080p24 */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '7') }, /* MPEG-2 HDV 1080p25 */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '8') }, /* MPEG-2 HDV 1080p30 */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '9') }, /* MPEG-2 HDV 720p60 JVC */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', 'a') }, /* MPEG-2 HDV 720p50 */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG-2 IMX NTSC 525/60 50mb/s produced by FCP */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG-2 IMX PAL 625/50 50mb/s produced by FCP */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'n') }, /* MPEG-2 IMX NTSC 525/60 40mb/s produced by FCP */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'p') }, /* MPEG-2 IMX PAL 625/50 40mb/s produced by FCP */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG-2 IMX NTSC 525/60 30mb/s produced by FCP */
+ { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG-2 IMX PAL 625/50 30mb/s produced by FCP */
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '1') }, /* XDCAM HD422 720p30 CBR */
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '4') }, /* XDCAM HD422 720p24 CBR */
{ AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '5') }, /* XDCAM HD422 720p25 CBR */
/* map numeric codes from mdhd atom to ISO 639 */
/* cf. QTFileFormat.pdf p253, qtff.pdf p205 */
/* http://developer.apple.com/documentation/mac/Text/Text-368.html */
-/* deprecated by putting the code as 3*5bit ascii */
+/* deprecated by putting the code as 3*5 bits ASCII */
static const char mov_mdhd_language_map[][4] = {
/* 0-9 */
"eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor",
/* handle undefined as such */
if (lang[0] == '\0')
lang = "und";
- /* 5bit ascii */
+ /* 5 bits ASCII */
for (i = 0; i < 3; i++) {
uint8_t c = lang[i];
c -= 0x60;
int len;
*tag = avio_r8(pb);
len = ff_mp4_read_descr_len(pb);
- av_log(fc, AV_LOG_TRACE, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
+ av_log(fc, AV_LOG_TRACE, "MPEG-4 description: tag=0x%02x len=%d\n", *tag, len);
return len;
}
av_log(fc, AV_LOG_TRACE, "esds object type id 0x%02x\n", object_type_id);
len = ff_mp4_read_descr(fc, pb, &tag);
if (tag == MP4DecSpecificDescrTag) {
- av_log(fc, AV_LOG_TRACE, "Specific MPEG4 header len=%d\n", len);
+ av_log(fc, AV_LOG_TRACE, "Specific MPEG-4 header len=%d\n", len);
if (!len || (uint64_t)len > (1<<30))
return -1;
av_free(st->codecpar->extradata);
/*
* Matroska common data
- * Copyright (c) 2003-2004 The ffmpeg Project
+ * Copyright (c) 2003-2004 The FFmpeg project
*
* This file is part of Libav.
*
/*
* Matroska constants
- * Copyright (c) 2003-2004 The ffmpeg Project
+ * Copyright (c) 2003-2004 The FFmpeg project
*
* This file is part of Libav.
*
flags = AV_RL16(p + sizeof(ff_asf_guid)*3 + 24);
stream_id = flags & 0x7F;
//The second condition is for checking CS_PKT_STREAM_ID_REQUEST packet size,
- //we can calcuate the packet size by stream_num.
+ //we can calculate the packet size by stream_num.
//Please see function send_stream_selection_request().
if (mms->stream_num < MMS_MAX_STREAMS &&
46 + mms->stream_num * 6 < sizeof(mms->out_buffer)) {
// see Ref 2.2.1.8
#define USERAGENT "User-Agent: NSPlayer/4.1.0.3856\r\n"
// see Ref 2.2.1.4.33
-// the guid value can be changed to any valid value.
+// the GUID value can be changed to any valid value.
#define CLIENTGUID "Pragma: xClientGUID={c77e7400-738a-11d2-9add-0020af0a3278}\r\n"
// see Ref 2.2.3 for packet type define:
char data_string[256];
MMSContext *mms = &mmst->mms;
// SubscriberName is defined in MS specification linked below.
- // The guid value can be any valid value.
+ // The GUID value can be any valid value.
// http://download.microsoft.com/
// download/9/5/E/95EF66AF-9026-4BB0-A41D-A4F81802D92C/%5BMS-WMSP%5D.pdf
snprintf(data_string, sizeof(data_string),
sizeof(mmst->path), uri);
if(port<0)
- port = 1755; // defaut mms protocol port
+ port = 1755; // default MMS protocol port
// establish tcp connection.
ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, mmst->host, port, NULL);
return 0;
}
-/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
+/* FIXME modify QDM2/SVQ3/H.264 decoders to take full atom as extradata */
static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
} else if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
- /* skip old asf mpeg4 tag */
+ /* skip old ASF MPEG-4 tag */
format && format != MKTAG('m','p','4','s')) {
id = ff_codec_get_id(ff_codec_movvideo_tags, format);
if (id <= 0)
/* codec_tag YV12 triggers an UV swap in rawdec.c */
if (!memcmp(codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
st->codecpar->codec_tag = MKTAG('I', '4', '2', '0');
- /* Flash Media Server uses tag H263 with Sorenson Spark */
+ /* Flash Media Server uses tag H.263 with Sorenson Spark */
if (st->codecpar->codec_tag == MKTAG('H','2','6','3') &&
!memcmp(codec_name, "Sorenson H263", 13))
st->codecpar->codec_id = AV_CODEC_ID_FLV1;
finish();
close_out();
- // Write a similar file, but with b-frames and audio preroll, handled
+ // Write a similar file, but with B-frames and audio preroll, handled
// via an edit list.
init_out("non-empty-moov-elst");
av_dict_set(&opts, "movflags", "frag_keyframe", 0);
finish();
close_out();
- // Use b-frames but no audio-preroll, but without an edit list.
+ // Use B-frames but no audio-preroll, but without an edit list.
// Due to avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO, the dts
// of the first audio packet is > 0, but it is set to zero since edit
// lists aren't used, increasing the duration of the first packet instead.
close_out();
format = "ismv";
- // Write an ISMV, with b-frames and audio preroll.
+ // Write an ISMV, with B-frames and audio preroll.
init_out("ismv");
av_dict_set(&opts, "movflags", "frag_keyframe", 0);
init(1, 1);
finish();
- // Test discontinously written fragments with b-frames (where the
+ // Test discontinuously written fragments with B-frames (where the
// assumption of starting at pts=0 works) but not with audio preroll
// (which can't be guessed).
av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash", 0);
finish();
- // Test discontinously written fragments with b-frames and audio preroll,
+ // Test discontinuously written fragments with B-frames and audio preroll,
// properly signaled.
av_dict_set(&opts, "movflags", "frag_custom+delay_moov+dash", 0);
init(1, 1);
/* In the positive delay case, the delay includes the cts
* offset, and the second edit list entry below trims out
* the same amount from the actual content. This makes sure
- * that the offsetted last sample is included in the edit
+ * that the offset last sample is included in the edit
* list duration as well. */
if (version == 1) {
avio_wb64(pb, delay);
}
if (par->codec_id == AV_CODEC_ID_H264 && trk->vos_len > 0 && *(uint8_t *)trk->vos_data != 1) {
- /* from x264 or from bytestream h264 */
- /* nal reformating needed */
+ /* from x264 or from bytestream H.264 */
+ /* NAL reformatting needed */
if (trk->hint_track >= 0 && trk->hint_track < mov->nb_streams) {
ff_avc_parse_nal_units_buf(pkt->data, &reformatted_data,
&size);
/*
- * MPEG1/2 demuxer
+ * MPEG-1/2 demuxer
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
* This file is part of Libav.
goto error_redo;
c = avio_r8(s->pb);
len--;
- /* XXX: for mpeg1, should test only bit 7 */
+ /* XXX: for MPEG-1, should test only bit 7 */
if (c != 0xff)
break;
}
/*
- * MPEG1/2 muxer and demuxer common defines
+ * MPEG-1/2 muxer and demuxer common defines
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
* This file is part of Libav.
/*
- * MPEG1/2 muxer
+ * MPEG-1/2 muxer
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
* This file is part of Libav.
put_bits(&pb, 1, 1);
} else {
put_bits(&pb, 1, 0); /* variable bitrate */
- put_bits(&pb, 1, 0); /* non constrainted bit stream */
+ put_bits(&pb, 1, 0); /* nonconstrained bitstream */
}
if (s->is_vcd || s->is_dvd) {
break;
}
- /* End header according to MPEG1 systems standard. We do not write
+ /* End header according to MPEG-1 systems standard. We do not write
* it as it is usually not needed by decoders and because it
* complicates MPEG stream concatenation. */
// avio_wb32(ctx->pb, ISO_11172_END_CODE);
/*
- * MPEG2 transport stream (aka DVB) demuxer
+ * MPEG-2 transport stream (aka DVB) demuxer
* Copyright (c) 2002-2003 Fabrice Bellard
*
* This file is part of Libav.
#include "mpeg.h"
#include "isom.h"
-/* maximum size in which we look for synchronisation if
- * synchronisation is lost */
+/* maximum size in which we look for synchronization if
+ * synchronization is lost */
#define MAX_RESYNC_SIZE 65536
#define MAX_PES_PAYLOAD 200 * 1024
};
#define MPEGTS_OPTIONS \
- { "resync_size", "Size limit for looking up a new syncronization.", offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }
+ { "resync_size", "Size limit for looking up a new synchronization.", offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }
static const AVOption options[] = {
MPEGTS_OPTIONS,
* decide */
if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
pes->header[2] == 0x01) {
- /* it must be an mpeg2 PES stream */
+ /* it must be an MPEG-2 PES stream */
code = pes->header[3] | 0x100;
av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
code);
/*
- * MPEG2 transport stream defines
+ * MPEG-2 transport stream defines
* Copyright (c) 2003 Fabrice Bellard
*
* This file is part of Libav.
/*
- * MPEG2 transport stream (aka DVB) muxer
+ * MPEG-2 transport stream (aka DVB) muxer
* Copyright (c) 2003 Fabrice Bellard
*
* This file is part of Libav.
} MpegTSSection;
typedef struct MpegTSService {
- MpegTSSection pmt; /* MPEG2 pmt table context */
+ MpegTSSection pmt; /* MPEG-2 PMT table context */
int sid; /* service ID */
char *name;
char *provider_name;
typedef struct MpegTSWrite {
const AVClass *av_class;
- MpegTSSection pat; /* MPEG2 pat table */
- MpegTSSection sdt; /* MPEG2 sdt table context */
+ MpegTSSection pat; /* MPEG-2 PAT table */
+ MpegTSSection sdt; /* MPEG-2 SDT table context */
MpegTSService **services;
int sdt_packet_count;
int sdt_packet_period;
return ret;
}
-/* send SDT, PAT and PMT tables regulary */
+/* send SDT, PAT and PMT tables regularly */
static void retransmit_si_info(AVFormatContext *s)
{
MpegTSWrite *ts = s->priv_data;
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* 422P@HL I-Frame */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 }, 14, AV_CODEC_ID_MPEG4 }, /* XDCAM proxy_pal030926.mxf */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 }, 13, AV_CODEC_ID_DVVIDEO }, /* DV25 IEC PAL */
- { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
- { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 }, 13, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed */
- { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, 15, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed 422 8-bit */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG 2000 code stream */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 }, 13, AV_CODEC_ID_RAWVIDEO }, /* uncompressed */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, 15, AV_CODEC_ID_RAWVIDEO }, /* uncompressed 422 8-bit */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x71,0x00,0x00,0x00 }, 13, AV_CODEC_ID_DNXHD }, /* SMPTE VC-3/DNxHD */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x03,0x02,0x00,0x00 }, 14, AV_CODEC_ID_DNXHD }, /* SMPTE VC-3/DNxHD */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x00,0x00 }, 14, AV_CODEC_ID_H264 }, /* H.264/MPEG-4 AVC Intra */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x31,0x11,0x01 }, 14, AV_CODEC_ID_H264 }, /* H.264/MPEG-4 AVC SPS/PPS in-band */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, 15, AV_CODEC_ID_V210 }, /* V210 */
/* SoundEssenceCompression */
- { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x03,0x04,0x02,0x02,0x02,0x03,0x03,0x01,0x00 }, 14, AV_CODEC_ID_AAC }, /* MPEG2 AAC ADTS (legacy) */
- { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 }, 13, AV_CODEC_ID_PCM_S16LE }, /* Uncompressed */
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x03,0x04,0x02,0x02,0x02,0x03,0x03,0x01,0x00 }, 14, AV_CODEC_ID_AAC }, /* MPEG-2 AAC ADTS (legacy) */
+ { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 }, 13, AV_CODEC_ID_PCM_S16LE }, /* uncompressed */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 }, 13, AV_CODEC_ID_PCM_S16LE },
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 }, 13, AV_CODEC_ID_PCM_S16BE }, /* From Omneon MXF file */
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 }, 15, AV_CODEC_ID_PCM_ALAW }, /* XDCAM Proxy C0023S01.mxf */
partition->previous_partition);
}
- /* some files don'thave FooterPartition set in every partition */
+ /* some files don't have FooterPartition set in every partition */
if (footer_partition) {
if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
av_log(mxf->fc, AV_LOG_ERROR,
static const MXFCodecUL mxf_picture_essence_container_uls[] = {
// video essence container uls
- { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MPEG-ES frame-wrapped */
{ { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
- { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* uncompressed picture */
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
};
/* EC ULs for intra-only formats */
static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
- { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x00,0x00 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MXF-GC SMPTE D-10 Mappings */
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x00,0x00 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MXF-GC SMPTE D-10 mappings */
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
};
/* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
{ { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x00,0x00 }, 14, AV_CODEC_ID_H264 }, /* H.264/MPEG-4 AVC Intra Profiles */
- { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG 2000 code stream */
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
};
{ { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, AV_CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
{ { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, AV_CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
{ { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4F }, 14, AV_CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */
- { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x03,0x04,0x02,0x02,0x02,0x03,0x03,0x01,0x00 }, 14, AV_CODEC_ID_AAC }, /* MPEG2 AAC ADTS (legacy) */
+ { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x03,0x04,0x02,0x02,0x02,0x03,0x03,0x01,0x00 }, 14, AV_CODEC_ID_AAC }, /* MPEG-2 AAC ADTS (legacy) */
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
};
for (i = 0; i < mxf->edit_units_count; i++) {
int temporal_offset = 0;
- if (!(mxf->index_entries[i].flags & 0x33)) { // I frame
+ if (!(mxf->index_entries[i].flags & 0x33)) { // I-frame
mxf->last_key_index = key_index;
key_index = i;
}
mxf->last_key_index = key_index;
}
- if (!(mxf->index_entries[i].flags & 0x33) && // I frame
+ if (!(mxf->index_entries[i].flags & 0x33) && // I-frame
mxf->index_entries[i].flags & 0x40 && !temporal_offset)
mxf->index_entries[i].flags |= 0x80; // random access
avio_w8(pb, mxf->index_entries[i].flags);
} else if (c == 0x100) { // pic
int pict_type = (pkt->data[i+2]>>3) & 0x07;
e->temporal_ref = (pkt->data[i+1]<<2) | (pkt->data[i+2]>>6);
- if (pict_type == 2) { // P frame
+ if (pict_type == 2) { // P-frame
e->flags |= 0x22;
- sc->closed_gop = 0; // reset closed gop, don't matter anymore
- } else if (pict_type == 3) { // B frame
+ sc->closed_gop = 0; // reset closed GOP, don't matter anymore
+ } else if (pict_type == 3) { // B-frame
if (sc->closed_gop)
e->flags |= 0x13; // only backward prediction
else
if (st->index == 0) {
if (!mxf->edit_unit_byte_count &&
(!mxf->edit_units_count || mxf->edit_units_count > EDIT_UNITS_PER_BODY) &&
- !(ie.flags & 0x33)) { // I frame, Gop start
+ !(ie.flags & 0x33)) { // I-frame, GOP start
mxf_write_klv_fill(s);
if ((err = mxf_write_partition(s, 1, 2, body_partition_key, 0)) < 0)
return err;
* (that is the offset of the data table after the header).
* After checking all samples from (S1) all confirms this.
*
- * Then, about NSVf[12-15], faster.nsf has 179700. When veiwing it in VLC,
+ * Then, about NSVf[12-15], faster.nsf has 179700. When viewing it in VLC,
* I noticed there was about 1 NVSs chunk/s, so I ran
* strings faster.nsv | grep NSVs | wc -l
* which gave me 180. That leads me to think that NSVf[12-15] might be the
* file length in milliseconds.
* Let's try that:
* for f in *.nsv; do HTIME="$(od -t x4 "$f" | head -1 | sed 's/.* //')"; echo "'$f' $((0x$HTIME))s = $((0x$HTIME/1000/60)):$((0x$HTIME/1000%60))"; done
- * except for nstrailer (which doesn't have an NSVf header), it repports correct time.
+ * except for nsvtrailer (which doesn't have an NSVf header), it reports correct time.
*
* nsvtrailer.nsv (S1) does not have any NSVf header, only NSVs chunks,
* so the header seems to not be mandatory. (for streaming).
((auxtag >> 24) & 0x0ff),
auxsize);
avio_skip(pb, auxsize);
- vsize -= auxsize + sizeof(uint16_t) + sizeof(uint32_t); /* that's becoming braindead */
+ vsize -= auxsize + sizeof(uint16_t) + sizeof(uint32_t); /* that's becoming brain-dead */
}
if (pb->eof_reached)
}
}
- /* this restaurant is not approvisionned :^] */
+ /* this restaurant is not provisioned :^] */
return -1;
}
st->codecpar->profile = dsh->profile;
st->codecpar->level = dsh->level;
- // dirac in ogg always stores timestamps as though the video were interlaced
+ // Dirac in Ogg always stores timestamps as though the video were interlaced
avpriv_set_pts_info(st, 64, dsh->framerate.den, 2 * dsh->framerate.num);
av_freep(&dsh);
return 1;
}
-// various undocument things: granule is signed (only for dirac!)
+// various undocumented things: granule is signed (only for Dirac!)
static uint64_t dirac_gptopts(AVFormatContext *s, int idx, uint64_t granule,
int64_t *dts_out)
{
/*
* Sony Playstation (PSX) STR File Demuxer
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
* in the AVFormatContext, and this variable points to the offset in
* that array such that the first is the first stream of this set. */
AVStream **streams;
- int n_streams; /**< streams with identifical content in this set */
+ int n_streams; /**< streams with identical content in this set */
void *dynamic_protocol_context;
DynamicPayloadPacketHandlerProc parse_packet;
uint32_t prev_timestamp;
if(back_size > INT_MAX/2 || frame_count > INT_MAX / sizeof(uint32_t))
return AVERROR_INVALIDDATA;
- avio_skip(pb, 2); /* encoding mentod */
+ avio_skip(pb, 2); /* encoding method */
sound_rate = avio_rl16(pb);
rate = avio_rl16(pb);
channels = avio_rl16(pb);
avio_wb16(s, (int) stream->frame_rate); /* unknown meaning */
avio_wb32(s,0); /* unknown meaning */
avio_wb16(s, 8); /* unknown meaning */
- /* Seems to be the codec version: only use basic H263. The next
- versions seems to add a diffential DC coding as in
- MPEG... nothing new under the sun */
+ /* Seems to be the codec version: only use basic H.263. The next
+ versions seems to add a differential DC coding as in
+ MPEG... nothing new under the sun. */
if(stream->par->codec_id == AV_CODEC_ID_RV10)
avio_wb32(s,0x10000000);
else
write_packet_header(s, stream, size + 7 + (size >= 0x4000)*4, key_frame);
/* bit 7: '1' if final packet of a frame converted in several packets */
avio_w8(pb, 0x81);
- /* bit 7: '1' if I frame. bits 6..0 : sequence number in current
+ /* bit 7: '1' if I-frame. bits 6..0 : sequence number in current
frame starting from 1 */
if (key_frame) {
avio_w8(pb, 0x81);
} else {
if (rt->nb_bytes_read == 0) {
/* Wait 50ms before retrying to read a server reply in
- * order to reduce the number of idle requets. */
+ * order to reduce the number of idle requests. */
av_usleep(50000);
}
tmpstr, rt->app);
ff_rtmp_packet_destroy(&pkt);
- // Send Window Acknowledgement Size (as defined in speficication)
+ // Send Window Acknowledgement Size (as defined in specification)
if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL,
RTMP_PT_SERVER_BW, 0, 4)) < 0)
return ret;
/**
* Generate 'FCPublish' call and send it to the server. It should make
- * the server preapare for receiving media streams.
+ * the server prepare for receiving media streams.
*/
static int gen_fcpublish_stream(URLContext *s, RTMPContext *rt)
{
* successful response, we will return set the value to number (otherwise number
* will not be changed).
*
- * @return 0 if reading the value succeeds, negative value otherwiss
+ * @return 0 if reading the value succeeds, negative value otherwise
*/
static int read_number_result(RTMPPacket *pkt, double *number)
{
// Value 3/4: Null
if (ff_amf_read_null(&gbc))
return AVERROR_INVALIDDATA;
- // Value 4/4: The resonse as AMF_NUMBER
+ // Value 4/4: The response as AMF_NUMBER
if (ff_amf_read_number(&gbc, &numbuffer))
return AVERROR_INVALIDDATA;
else
*/
static int inject_fake_duration_metadata(RTMPContext *rt)
{
- // We need to insert the metdata packet directly after the FLV
+ // We need to insert the metadata packet directly after the FLV
// header, i.e. we need to move all other already read data by the
// size of our fake metadata packet.
/**
* open a new RTP parse context for stream 'st'. 'st' can be NULL for
- * MPEG2-TS streams.
+ * MPEG-2 TS streams.
*/
RTPDemuxContext *ff_rtp_parse_open(AVFormatContext *s1, AVStream *st,
int payload_type, int queue_size)
/* Invalid src for this format, and bits that should be zero
* according to RFC 2190 aren't zero. */
av_log(ctx, AV_LOG_WARNING,
- "Interpreting H263 RTP data as RFC 2429/4629 even though "
+ "Interpreting H.263 RTP data as RFC 2429/4629 even though "
"signalled with a static payload type.\n");
data->newformat = 1;
return ff_h263_handle_packet(ctx, data, st, pkt, timestamp, buf,
/*
- * RTP H264 Protocol (RFC3984)
+ * RTP H.264 Protocol (RFC3984)
* Copyright (c) 2006 Ryan Martell
*
* This file is part of Libav.
uint8_t fu_indicator, fu_header, start_bit, nal_type, nal;
if (len < 3) {
- av_log(ctx, AV_LOG_ERROR, "Too short data for FU-A H264 RTP packet\n");
+ av_log(ctx, AV_LOG_ERROR, "Too short data for FU-A H.264 RTP packet\n");
return AVERROR_INVALIDDATA;
}
int result = 0;
if (!len) {
- av_log(ctx, AV_LOG_ERROR, "Empty H264 RTP packet\n");
+ av_log(ctx, AV_LOG_ERROR, "Empty H.264 RTP packet\n");
return AVERROR_INVALIDDATA;
}
nal = buf[0];
type = nal & 0x1f;
- /* Simplify the case (these are all the nal types used internally by
- * the h264 codec). */
+ /* Simplify the case (these are all the NAL types used internally by
+ * the H.264 codec). */
if (type >= 1 && type <= 23)
type = 1;
switch (type) {
/**
* @file
- * @brief MPEG4 / RTP Code
+ * @brief MPEG-4 / RTP Code
* @author Fabrice Bellard
* @author Romain Degez
*/
init_get_bits(&getbitcontext, buf, data->au_headers_length_bytes * 8);
- /* XXX: Wrong if optionnal additional sections are present (cts, dts etc...) */
+ /* XXX: Wrong if optional additional sections are present (cts, dts etc...) */
au_header_size = data->sizelength + data->indexlength;
if (au_header_size <= 0 || (au_headers_length % au_header_size != 0))
return -1;
if (pos + 12 > len)
return AVERROR_INVALIDDATA;
- skip_bits(&gb, 2); // has non-I frames:1, is sparse:1
+ skip_bits(&gb, 2); // has non-I-frames:1, is sparse:1
is_start = get_bits1(&gb);
is_finish = get_bits1(&gb);
if (!is_start || !is_finish) {
int prev_pictureid;
int broken_frame;
/* If sequence_dirty is set, we have lost some data (critical or
- * non-critical) and decoding will have some sort of artefacts, and
+ * non-critical) and decoding will have some sort of artifacts, and
* we thus should request a new keyframe.
*/
int sequence_dirty;
case AV_CODEC_ID_H261:
if (s1->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
av_log(s, AV_LOG_ERROR,
- "Packetizing H261 is experimental and produces incorrect "
+ "Packetizing H.261 is experimental and produces incorrect "
"packetization for cases where GOBs don't fit into packets "
"(even though most receivers may handle it just fine). "
"Please set -f_strict experimental in order to enable it.\n");
break;
case AV_CODEC_ID_HEVC:
/* Only check for the standardized hvcC version of extradata, keeping
- * things simple and similar to the avcC/H264 case above, instead
+ * things simple and similar to the avcC/H.264 case above, instead
* of trying to handle the pre-standardization versions (as in
* libavcodec/hevc.c). */
if (st->codecpar->extradata_size > 21 && st->codecpar->extradata[0] == 1) {
{ "latm", "Use MP4A-LATM packetization instead of MPEG4-GENERIC for AAC", 0, AV_OPT_TYPE_CONST, {.i64 = FF_RTP_FLAG_MP4A_LATM}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
{ "rfc2190", "Use RFC 2190 packetization instead of RFC 4629 for H.263", 0, AV_OPT_TYPE_CONST, {.i64 = FF_RTP_FLAG_RFC2190}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
{ "skip_rtcp", "Don't send RTCP sender reports", 0, AV_OPT_TYPE_CONST, {.i64 = FF_RTP_FLAG_SKIP_RTCP}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
- { "h264_mode0", "Use mode 0 for H264 in RTP", 0, AV_OPT_TYPE_CONST, {.i64 = FF_RTP_FLAG_H264_MODE0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
+ { "h264_mode0", "Use mode 0 for H.264 in RTP", 0, AV_OPT_TYPE_CONST, {.i64 = FF_RTP_FLAG_H264_MODE0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
{ "send_bye", "Send RTCP BYE packets when finishing", 0, AV_OPT_TYPE_CONST, {.i64 = FF_RTP_FLAG_SEND_BYE}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" } \
void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m);
rtp_ctx->buf[2] = 0; /* quant=0, hmvd=5 */
rtp_ctx->buf[3] = 0; /* vmvd=0 */
if (frame_size < 2 || frame_buf[0] != 0 || frame_buf[1] != 1) {
- /* A full, correct fix for this would be to make the H261 encoder
+ /* A full, correct fix for this would be to make the H.261 encoder
* support inserting extra GOB headers (triggered by setting e.g.
* "-ps 1"), and including information about macroblock boundaries
* (such as for h263_rfc2190). */
av_log(ctx, AV_LOG_WARNING,
- "RTP/H261 packet not cut at a GOB boundary, not signaled correctly\n");
+ "RTP/H.261 packet not cut at a GOB boundary, not signaled correctly\n");
}
cur_frame_size = FFMIN(rtp_ctx->max_payload_size - RTP_H261_HEADER_SIZE, frame_size);
init_get_bits(&gb, buf, size*8);
if (get_bits(&gb, 22) == 0x20) { /* Picture Start Code */
info.tr = get_bits(&gb, 8);
- skip_bits(&gb, 2); /* PTYPE start, H261 disambiguation */
+ skip_bits(&gb, 2); /* PTYPE start, H.261 disambiguation */
skip_bits(&gb, 3); /* Split screen, document camera, freeze picture release */
info.src = get_bits(&gb, 3);
info.i = get_bits(&gb, 1);
mb_info_pos++;
} else {
av_log(s1, AV_LOG_ERROR,
- "Unable to split H263 packet, use -mb_info %d "
+ "Unable to split H.263 packet, use -mb_info %d "
"or lower.\n", s->max_payload_size - 8);
}
} else {
- av_log(s1, AV_LOG_ERROR, "Unable to split H263 packet, "
+ av_log(s1, AV_LOG_ERROR, "Unable to split H.263 packet, "
"use -mb_info %d or -ps 1.\n",
s->max_payload_size - 8);
}
return;
}
- /* preparse the header for getting some infos */
+ /* preparse the header for getting some info */
for (i = 0; i < size; i++) {
if (buf[i] != 0xff)
continue;
// 0 - whole frame (possibly multiple frames)
// 1 - first fragment
// 2 - fragment continuation
- // 3 - last fragmement
+ // 3 - last fragment
frag = size <= max_pkt_size ? 0 : 1;
if (!frag && !xdt) { // do we have a whole frame of raw data?
goto err;
nalu_type = extradata[pos] & 0x3f;
// Not including libavcodec/hevc.h to avoid confusion between
- // NAL_* with the same name for both H264 and HEVC.
+ // NAL_* with the same name for both H.264 and HEVC.
if (nalu_type == 32) // VPS
ps_pos[0] = pos;
else if (nalu_type == 33) // SPS
/*
* Sega FILM Format (CPK) Demuxer
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
* Sierra VMD Format Demuxer
- * Copyright (c) 2004 The ffmpeg Project
+ * Copyright (c) 2004 The FFmpeg project
*
* This file is part of Libav.
*
static const uint16_t spdif_mpeg_pkt_offset[2][3] = {
//LAYER1 LAYER2 LAYER3
- { 3072, 9216, 4608 }, // MPEG2 LSF
- { 1536, 4608, 4608 }, // MPEG1
+ { 3072, 9216, 4608 }, // MPEG-2 LSF
+ { 1536, 4608, 4608 }, // MPEG-1
};
void ff_spdif_bswap_buf16(uint16_t *dst, const uint16_t *src, int w);
/*
* Terminology used in specification:
* data-burst - IEC61937 frame, contains header and encapsuled frame
- * burst-preambule - IEC61937 frame header, contains 16-bits words named Pa, Pb, Pc and Pd
+ * burst-preamble - IEC61937 frame header, contains 16-bit words named Pa, Pb, Pc and Pd
* burst-payload - encapsuled frame
* Pa, Pb - syncword - 0xF872, 0x4E1F
* Pc - burst-info, contains data-type (bits 0-6), error flag (bit 7), data-type-dependent info (bits 8-12)
* DTS type IV (DTS-HD) can be transmitted with various frame repetition
* periods; longer repetition periods allow for longer packets and therefore
* higher bitrate. Longer repetition periods mean that the constant bitrate of
- * the outputted IEC 61937 stream is higher.
+ * the output IEC 61937 stream is higher.
* The repetition period is measured in IEC 60958 frames (4 bytes).
*/
static int spdif_dts4_subtype(int period)
static const enum IEC61937DataType mpeg_data_type[2][3] = {
// LAYER1 LAYER2 LAYER3
- { IEC61937_MPEG2_LAYER1_LSF, IEC61937_MPEG2_LAYER2_LSF, IEC61937_MPEG2_LAYER3_LSF },//MPEG2 LSF
- { IEC61937_MPEG1_LAYER1, IEC61937_MPEG1_LAYER23, IEC61937_MPEG1_LAYER23 }, //MPEG1
+ { IEC61937_MPEG2_LAYER1_LSF, IEC61937_MPEG2_LAYER2_LSF, IEC61937_MPEG2_LAYER3_LSF }, // MPEG-2 LSF
+ { IEC61937_MPEG1_LAYER1, IEC61937_MPEG1_LAYER23, IEC61937_MPEG1_LAYER23 }, // MPEG-1
};
static int spdif_header_mpeg(AVFormatContext *s, AVPacket *pkt)
int ffurl_shutdown(URLContext *h, int flags);
/**
- * Check if the user has requested to interrup a blocking function
+ * Check if the user has requested to interrupt a blocking function
* associated with cb.
*/
int ff_check_interrupt(AVIOInterruptCB *cb);
/*
* Wing Commander III Movie (.mve) File Demuxer
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
* Westwood Studios AUD Format Demuxer
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
/*
* Westwood Studios VQA Format Demuxer
- * Copyright (c) 2003 The ffmpeg Project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
chunk_tag = AV_RB32(&scratch[0]);
chunk_size = AV_RB32(&scratch[4]);
- /* catch any unknown header tags, for curiousity */
+ /* catch any unknown header tags, for curiosity */
switch (chunk_tag) {
case CINF_TAG:
case CINH_TAG:
#include "asf.h"
#include "mpegts.h"
-/* Macros for formating GUIDs */
+/* Macros for formatting GUIDs */
#define PRI_PRETTY_GUID \
"%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x"
#define ARG_PRETTY_GUID(g) \
AVIOContext *pb; /** timeline file */
int64_t epoch;
int64_t pts; /** pts for next data chunk */
- int64_t last_valid_pts; /** latest valid pts, used for interative seeking */
+ int64_t last_valid_pts; /** latest valid pts, used for interactive seeking */
/* maintain private seek index, as the AVIndexEntry->pos is relative to the
start of the 'timeline' file, not the file system (AVFormatContext->pb) */
*/
void (*quantize)(int16_t *dst, const float *src, float *dither, int len);
- int ptr_align; ///< src and dst constraits for quantize()
- int samples_align; ///< len constraits for quantize()
+ int ptr_align; ///< src and dst constraints for quantize()
+ int samples_align; ///< len constraints for quantize()
/**
* Convert dither noise from int to float with triangular distribution.
#include "resample_template.c"
-/* 0th order modified bessel function of the first kind. */
+/* 0th order modified Bessel function of the first kind. */
static double bessel(double x)
{
double v = 1;
/**
* assert() equivalent, that does not lie in speed critical code.
- * These asserts() thus can be enabled without fearing speedloss.
+ * These asserts() thus can be enabled without fearing speed loss.
*/
#if defined(ASSERT_LEVEL) && ASSERT_LEVEL > 0
#define av_assert1(cond) av_assert0(cond)
/*
* AVR32 does not support unaligned memory accesses, except for the AP
- * series which suppports unaligned 32-bit loads and stores. 16-bit
+ * series which supports unaligned 32-bit loads and stores. 16-bit
* and 64-bit accesses must be aligned to 16 and 32 bits, respectively.
* This means we cannot use the byte-swapping load/store instructions
* here.
AV_PICTURE_TYPE_I = 1, ///< Intra
AV_PICTURE_TYPE_P, ///< Predicted
AV_PICTURE_TYPE_B, ///< Bi-dir predicted
- AV_PICTURE_TYPE_S, ///< S(GMC)-VOP MPEG4
+ AV_PICTURE_TYPE_S, ///< S(GMC)-VOP MPEG-4
AV_PICTURE_TYPE_SI, ///< Switching Intra
AV_PICTURE_TYPE_SP, ///< Switching Predicted
AV_PICTURE_TYPE_BI, ///< BI type
#define AV_DICT_DONT_STRDUP_KEY 4 /**< Take ownership of a key that's been
allocated with av_malloc() and children. */
#define AV_DICT_DONT_STRDUP_VAL 8 /**< Take ownership of a value that's been
- allocated with av_malloc() and chilren. */
+ allocated with av_malloc() and children. */
#define AV_DICT_DONT_OVERWRITE 16 ///< Don't overwrite existing entries.
#define AV_DICT_APPEND 32 /**< If the entry already exists, append to it. Note that no
delimiter is added, the strings are simply concatenated. */
int palette_has_changed;
/**
- * reordered opaque 64bit (generally an integer or a double precision float
+ * reordered opaque 64 bits (generally an integer or a double precision float
* PTS but can be anything).
* The user sets AVCodecContext.reordered_opaque to represent the input at
* that time,
* A pool from which the frames are allocated by av_hwframe_get_buffer().
* This field may be set by the caller before calling av_hwframe_ctx_init().
* The buffers returned by calling av_buffer_pool_get() on this pool must
- * have the properties described in the documentation in the correponding hw
+ * have the properties described in the documentation in the corresponding hw
* type's header (hwcontext_*.h). The pool will be freed strictly before
* this struct's free() callback is invoked.
*
/**
* Get the constraints on HW frames given a device and the HW-specific
* configuration to be used with that device. If no HW-specific
- * confgiuration is provided, returns the maximum possible capabilities
+ * configuration is provided, returns the maximum possible capabilities
* of the device.
*
* @param device_ctx a reference to the associated AVHWDeviceContext.
*
* based on http://ubiqx.org/libcifs/source/Auth/MD5.c
* from Christopher R. Hertel (crh@ubiqx.mn.org)
- * Simplified, cleaned and IMO redundant comments removed by michael.
+ * Simplified, cleaned and IMO redundant comments removed by Michael.
*
* If you use gcc, then version 4.1 or later and -fomit-frame-pointer is
* strongly recommended.
#define AV_OPT_FLAG_VIDEO_PARAM 16
#define AV_OPT_FLAG_SUBTITLE_PARAM 32
/**
- * The option is inteded for exporting values to the caller.
+ * The option is intended for exporting values to the caller.
*/
#define AV_OPT_FLAG_EXPORT 64
/**
* to run on the IBM VGA graphics adapter use 6-bit palette components.
*
* @par
- * For all the 8bit per pixel formats, an RGB32 palette is in data[1] like
+ * For all the 8 bits per pixel formats, an RGB32 palette is in data[1] like
* for pal8. This palette is filled in automatically by the function
* allocating the picture.
*/
AV_PIX_FMT_GRAY8, ///< Y , 8bpp
AV_PIX_FMT_MONOWHITE, ///< Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb
AV_PIX_FMT_MONOBLACK, ///< Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb
- AV_PIX_FMT_PAL8, ///< 8 bit with AV_PIX_FMT_RGB32 palette
+ AV_PIX_FMT_PAL8, ///< 8 bits with AV_PIX_FMT_RGB32 palette
AV_PIX_FMT_YUVJ420P, ///< planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting color_range
AV_PIX_FMT_YUVJ422P, ///< planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting color_range
AV_PIX_FMT_YUVJ444P, ///< planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting color_range
AV_PIX_FMT_YUV444P16LE, ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
AV_PIX_FMT_YUV444P16BE, ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
#if FF_API_VDPAU
- AV_PIX_FMT_VDPAU_MPEG4, ///< MPEG4 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
+ AV_PIX_FMT_VDPAU_MPEG4, ///< MPEG-4 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
#endif
AV_PIX_FMT_DXVA2_VLD, ///< HW decoding through DXVA2, Picture.data[3] contains a LPDIRECT3DSURFACE9 pointer
AV_PIX_FMT_RGB444BE, ///< packed RGB 4:4:4, 16bpp, (msb)4A 4R 4G 4B(lsb), big-endian, most significant bits to 0
AV_PIX_FMT_BGR444LE, ///< packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), little-endian, most significant bits to 1
AV_PIX_FMT_BGR444BE, ///< packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), big-endian, most significant bits to 1
- AV_PIX_FMT_YA8, ///< 8bit gray, 8bit alpha
+ AV_PIX_FMT_YA8, ///< 8 bits gray, 8 bits alpha
AV_PIX_FMT_Y400A = AV_PIX_FMT_YA8, ///< alias for AV_PIX_FMT_YA8
AV_PIX_FMT_VDA, ///< HW acceleration through VDA, data[3] contains a CVPixelBufferRef
- AV_PIX_FMT_YA16BE, ///< 16bit gray, 16bit alpha (big-endian)
- AV_PIX_FMT_YA16LE, ///< 16bit gray, 16bit alpha (little-endian)
+ AV_PIX_FMT_YA16BE, ///< 16 bits gray, 16 bits alpha (big-endian)
+ AV_PIX_FMT_YA16LE, ///< 16 bits gray, 16 bits alpha (little-endian)
AV_PIX_FMT_GBRAP, ///< planar GBRA 4:4:4:4 32bpp
AV_PIX_FMT_GBRAP16BE, ///< planar GBRA 4:4:4:4 64bpp, big-endian
AVCOL_TRC_IEC61966_2_4 = 11, ///< IEC 61966-2-4
AVCOL_TRC_BT1361_ECG = 12, ///< ITU-R BT1361 Extended Colour Gamut
AVCOL_TRC_IEC61966_2_1 = 13, ///< IEC 61966-2-1 (sRGB or sYCC)
- AVCOL_TRC_BT2020_10 = 14, ///< ITU-R BT2020 for 10 bit system
- AVCOL_TRC_BT2020_12 = 15, ///< ITU-R BT2020 for 12 bit system
- AVCOL_TRC_SMPTEST2084 = 16, ///< SMPTE ST 2084 for 10, 12, 14 and 16 bit systems
+ AVCOL_TRC_BT2020_10 = 14, ///< ITU-R BT2020 for 10-bit system
+ AVCOL_TRC_BT2020_12 = 15, ///< ITU-R BT2020 for 12-bit system
+ AVCOL_TRC_SMPTEST2084 = 16, ///< SMPTE ST 2084 for 10-, 12-, 14- and 16-bit systems
AVCOL_TRC_SMPTEST428_1 = 17, ///< SMPTE ST 428-1
AVCOL_TRC_NB, ///< Not part of ABI
};
*/
enum AVChromaLocation {
AVCHROMA_LOC_UNSPECIFIED = 0,
- AVCHROMA_LOC_LEFT = 1, ///< mpeg2/4, h264 default
- AVCHROMA_LOC_CENTER = 2, ///< mpeg1, jpeg, h263
+ AVCHROMA_LOC_LEFT = 1, ///< MPEG-2/4, H.264 default
+ AVCHROMA_LOC_CENTER = 2, ///< MPEG-1, JPEG, H.263
AVCHROMA_LOC_TOPLEFT = 3, ///< DV
AVCHROMA_LOC_TOP = 4,
AVCHROMA_LOC_BOTTOMLEFT = 5,
if (!sha) {
uint32_t seed = 0;
int j;
- // Unable to allocate an sha context, just xor the buffer together
+ // Unable to allocate an SHA context, just XOR the buffer together
// to create something hopefully unique.
for (j = 0; j < 512; j++)
seed ^= buffer[j];
/* Similar to the above but for AVX functions on AMD processors.
This is necessary only for functions using YMM registers on Bulldozer
- based CPUs as they lack 256-bits execution units. SSE/AVX functions
+ based CPUs as they lack 256-bit execution units. SSE/AVX functions
using XMM registers are always faster on them.
AV_CPU_FLAG_AVX and AV_CPU_FLAG_AVXSLOW are both set so that AVX is
used unless explicitly disabled by checking AV_CPU_FLAG_AVXSLOW.
V += chrVSrc[j][i] * chrFilter[j];
}
- // 8bit: 12+15=27; 16-bit: 12+19=31
+ // 8 bits: 12+15=27; 16 bits: 12+19=31
Y1 >>= 14; // 10
Y1 += 0x10000;
Y2 >>= 14;
U >>= 14;
V >>= 14;
- // 8bit: 27 -> 17bit, 16bit: 31 - 14 = 17bit
+ // 8 bits: 27 -> 17 bits, 16 bits: 31 - 14 = 17 bits
Y1 -= c->yuv2rgb_y_offset;
Y2 -= c->yuv2rgb_y_offset;
Y1 *= c->yuv2rgb_y_coeff;
Y2 *= c->yuv2rgb_y_coeff;
Y1 += 1 << 13; // 21
Y2 += 1 << 13;
- // 8bit: 17 + 13bit = 30bit, 16bit: 17 + 13bit = 30bit
+ // 8 bits: 17 + 13 bits = 30 bits, 16 bits: 17 + 13 bits = 30 bits
R = V * c->yuv2rgb_v2r_coeff;
G = V * c->yuv2rgb_v2g_coeff + U * c->yuv2rgb_u2g_coeff;
B = U * c->yuv2rgb_u2b_coeff;
- // 8bit: 30 - 22 = 8bit, 16bit: 30bit - 14 = 16bit
+ // 8 bits: 30 - 22 = 8 bits, 16 bits: 30 bits - 14 = 16 bits
output_pixel(&dest[0], av_clip_uintp2(R_B + Y1, 30) >> 14);
output_pixel(&dest[1], av_clip_uintp2( G + Y1, 30) >> 14);
output_pixel(&dest[2], av_clip_uintp2(B_R + Y1, 30) >> 14);
dest[i * 2 + 0] = r[Y1 + dr1] + g[Y1 + dg1] + b[Y1 + db1];
dest[i * 2 + 1] = r[Y2 + dr2] + g[Y2 + dg2] + b[Y2 + db2];
- } else /* 8/4-bit */ {
+ } else /* 8/4 bits */ {
uint8_t *dest = (uint8_t *) _dest;
const uint8_t *r = (const uint8_t *) _r;
const uint8_t *g = (const uint8_t *) _g;
#define SWS_PRINT_INFO 0x1000
//the following 3 flags are not completely implemented
-//internal chrominace subsampling info
+//internal chrominance subsampling info
#define SWS_FULL_CHR_H_INT 0x2000
//input subsampling info
#define SWS_FULL_CHR_H_INP 0x4000
* Write one line of horizontally scaled data to planar output
* without any additional vertical scaling (or point-scaling).
*
- * @param src scaled source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param dest pointer to the output plane. For >8bit
+ * @param src scaled source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param dest pointer to the output plane. For >8-bit
* output, this is in uint16_t
* @param dstW width of destination in pixels
* @param dither ordered dither array of type int16_t and size 8
* Write one line of horizontally scaled data to planar output
* with multi-point vertical scaling between input pixels.
*
- * @param filter vertical luma/alpha scaling coefficients, 12bit [0,4096]
- * @param src scaled luma (Y) or alpha (A) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
+ * @param filter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
+ * @param src scaled luma (Y) or alpha (A) source data, 15 bits for
+ * 8-10-bit output, 19 bits for 16-bit output (in int32_t)
* @param filterSize number of vertical input lines to scale
- * @param dest pointer to output plane. For >8bit
+ * @param dest pointer to output plane. For >8-bit
* output, this is in uint16_t
* @param dstW width of destination pixels
* @param offset Dither offset
* with multi-point vertical scaling between input pixels.
*
* @param c SWS scaling context
- * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
- * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
+ * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
+ * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit
+ * output, 19 bits for 16-bit output (in int32_t)
+ * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit
+ * output, 19 bits for 16-bit output (in int32_t)
* @param chrFilterSize number of vertical chroma input lines to scale
- * @param dest pointer to the output plane. For >8bit
+ * @param dest pointer to the output plane. For >8-bit
* output, this is in uint16_t
* @param dstW width of chroma planes
*/
* that this function may do chroma scaling, see the "uvalpha" argument.
*
* @param c SWS scaling context
- * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param dest pointer to the output plane. For 16bit output, this is
+ * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param dest pointer to the output plane. For 16-bit output, this is
* uint16_t
* @param dstW width of lumSrc and alpSrc in pixels, number of pixels
* to write into dest[]
* output by doing bilinear scaling between two input lines.
*
* @param c SWS scaling context
- * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param dest pointer to the output plane. For 16bit output, this is
+ * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param dest pointer to the output plane. For 16-bit output, this is
* uint16_t
* @param dstW width of lumSrc and alpSrc in pixels, number of pixels
* to write into dest[]
* output by doing multi-point vertical scaling between input pixels.
*
* @param c SWS scaling context
- * @param lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096]
- * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
+ * @param lumFilter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
+ * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
* @param lumFilterSize number of vertical luma/alpha input lines to scale
- * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
- * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
+ * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
+ * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
* @param chrFilterSize number of vertical chroma input lines to scale
- * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param dest pointer to the output plane. For 16bit output, this is
+ * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param dest pointer to the output plane. For 16-bit output, this is
* uint16_t
* @param dstW width of lumSrc and alpSrc in pixels, number of pixels
* to write into dest[]
* output by doing multi-point vertical scaling between input pixels.
*
* @param c SWS scaling context
- * @param lumFilter vertical luma/alpha scaling coefficients, 12bit [0,4096]
- * @param lumSrc scaled luma (Y) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
+ * @param lumFilter vertical luma/alpha scaling coefficients, 12 bits [0,4096]
+ * @param lumSrc scaled luma (Y) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
* @param lumFilterSize number of vertical luma/alpha input lines to scale
- * @param chrFilter vertical chroma scaling coefficients, 12bit [0,4096]
- * @param chrUSrc scaled chroma (U) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param chrVSrc scaled chroma (V) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
+ * @param chrFilter vertical chroma scaling coefficients, 12 bits [0,4096]
+ * @param chrUSrc scaled chroma (U) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param chrVSrc scaled chroma (V) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
* @param chrFilterSize number of vertical chroma input lines to scale
- * @param alpSrc scaled alpha (A) source data, 15bit for 8-10bit output,
- * 19-bit for 16bit output (in int32_t)
- * @param dest pointer to the output planes. For 16bit output, this is
+ * @param alpSrc scaled alpha (A) source data, 15 bits for 8-10-bit output,
+ * 19 bits for 16-bit output (in int32_t)
+ * @param dest pointer to the output planes. For 16-bit output, this is
* uint16_t
* @param dstW width of lumSrc and alpSrc in pixels, number of pixels
* to write into dest[]
* Scale one horizontal line of input data using a bilinear filter
* to produce one line of output data. Compared to SwsContext->hScale(),
* please take note of the following caveats when using these:
- * - Scaling is done using only 7bit instead of 14bit coefficients.
+ * - Scaling is done using only 7 bits instead of 14-bit coefficients.
* - You can use no more than 5 input pixels to produce 4 output
* pixels. Therefore, this filter should not be used for downscaling
* by more than ~20% in width (because that equals more than 5/4th
* @param dst pointer to destination buffer for horizontally scaled
* data. If the number of bits per component of one
* destination pixel (SwsContext->dstBpc) is <= 10, data
- * will be 15bpc in 16bits (int16_t) width. Else (i.e.
+ * will be 15 bpc in 16 bits (int16_t) width. Else (i.e.
* SwsContext->dstBpc == 16), data will be 19bpc in
- * 32bits (int32_t) width.
+ * 32 bits (int32_t) width.
* @param dstW width of destination image
* @param src pointer to source data to be scaled. If the number of
* bits per component of a source pixel (SwsContext->srcBpc)
- * is 8, this is 8bpc in 8bits (uint8_t) width. Else
+ * is 8, this is 8bpc in 8 bits (uint8_t) width. Else
* (i.e. SwsContext->dstBpc > 8), this is native depth
- * in 16bits (uint16_t) width. In other words, for 9-bit
+ * in 16 bits (uint16_t) width. In other words, for 9-bit
* YUV input, this is 9bpc, for 10-bit YUV input, this is
* 10bpc, and for 16-bit RGB or YUV, this is 16bpc.
* @param filter filter coefficients to be used per output pixel for
COPY16TO9_OR_10(AV_RL16, AV_WL16);
}
}
- } else /* 8bit */ {
+ } else /* 8 bits */ {
#define COPY8TO9_OR_10(wfunc) \
if (shiftonly) { \
for (i = 0; i < height; i++) { \
; const uint8_t *dither, int offset)
;
; Scale one or $filterSize lines of source data to generate one line of output
-; data. The input is 15-bit in int16_t if $output_size is [8,10] and 19-bit in
-; int32_t if $output_size is 16. $filter is 12-bits. $filterSize is a multiple
+; data. The input is 15 bits in int16_t if $output_size is [8,10] and 19 bits in
+; int32_t if $output_size is 16. $filter is 12 bits. $filterSize is a multiple
; of 2. $offset is either 0 or 3. $dither holds 8 values.
;-----------------------------------------------------------------------------
.pixelloop:
%assign %%i 0
- ; the rep here is for the 8bit output mmx case, where dither covers
+ ; the rep here is for the 8-bit output MMX case, where dither covers
; 8 pixels but we can only handle 2 pixels per register, and thus 4
; pixels per iteration. In order to not have to keep track of where
- ; we are w.r.t. dithering, we unroll the mmx/8bit loop x2.
+ ; we are w.r.t. dithering, we unroll the MMX/8-bit loop x2.
%if %1 == 8
%assign %%repcnt 16/mmsize
%else
; const int16_t *filter,
; const int32_t *filterPos, int filterSize);
;
-; Scale one horizontal line. Input is either 8-bits width or 16-bits width
+; Scale one horizontal line. Input is either 8-bit width or 16-bit width
; ($source_width can be either 8, 9, 10 or 16, difference is whether we have to
-; downscale before multiplying). Filter is 14-bits. Output is either 15bits
-; (in int16_t) or 19bits (in int32_t), as given in $intermediate_nbits. Each
+; downscale before multiplying). Filter is 14 bits. Output is either 15 bits
+; (in int16_t) or 19 bits (in int32_t), as given in $intermediate_nbits. Each
; output pixel is generated from $filterSize input pixels, the position of
; the first pixel is given in filterPos[nOutputPixel].
;-----------------------------------------------------------------------------
static const int codec_ids[4] = { AV_CODEC_ID_H264, AV_CODEC_ID_VP8, AV_CODEC_ID_RV40, AV_CODEC_ID_SVQ3 };
static const char * const pred4x4_modes[4][15] = {
- { /* H264 */
+ { /* H.264 */
[VERT_PRED ] = "vertical",
[HOR_PRED ] = "horizontal",
[DC_PRED ] = "dc",
};
static const char * const pred8x8_modes[4][11] = {
- { /* H264 */
+ { /* H.264 */
[DC_PRED8x8 ] = "dc",
[HOR_PRED8x8 ] = "horizontal",
[VERT_PRED8x8 ] = "vertical",
};
static const char * const pred16x16_modes[4][9] = {
- { /* H264 */
+ { /* H.264 */
[DC_PRED8x8 ] = "dc",
[HOR_PRED8x8 ] = "horizontal",
[VERT_PRED8x8 ] = "vertical",
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