/*
- * MPEG4 decoder.
+ * MPEG-4 decoder
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
*
#include "internal.h"
#include "mpegutils.h"
#include "mpegvideo.h"
+#include "mpegvideodata.h"
#include "mpeg4video.h"
#include "h263.h"
+#include "profiles.h"
#include "thread.h"
#include "xvididct.h"
MB_TYPE_L0 | MB_TYPE_16x16,
};
+static inline int check_marker(AVCodecContext *avctx, GetBitContext *s, const char *msg)
+{
+ int bit = get_bits1(s);
+ if (!bit)
+ av_log(avctx, AV_LOG_INFO, "Marker bit missing %s\n", msg);
+
+ return bit;
+}
+
/**
* Predict the ac.
* @param n block index (0-3 are luma, 4-5 are chroma)
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
while (get_bits1(&s->gb) != 0)
time_incr++;
- check_marker(&s->gb, "before time_increment in video packed header");
+ check_marker(s->avctx, &s->gb, "before time_increment in video packed header");
skip_bits(&s->gb, ctx->time_increment_bits); /* time_increment */
- check_marker(&s->gb, "before vop_coding_type in video packed header");
+ check_marker(s->avctx, &s->gb, "before vop_coding_type in video packed header");
skip_bits(&s->gb, 2); /* vop coding type */
// FIXME not rect stuff here
if (code > 8) {
if (get_bits1(&s->gb) == 0) { /* marker */
- if (s->err_recognition & AV_EF_BITSTREAM) {
+ if (s->avctx->err_recognition & AV_EF_BITSTREAM) {
av_log(s->avctx, AV_LOG_ERROR, "dc marker bit missing\n");
return -1;
}
level = level * qmul - qadd;
if ((unsigned)(level + 2048) > 4095) {
- if (s->err_recognition & AV_EF_BITSTREAM) {
+ if (s->avctx->err_recognition & AV_EF_BITSTREAM) {
if (level > 2560 || level < -2560) {
av_log(s->avctx, AV_LOG_ERROR,
"|level| overflow in 3. esc, qp=%d\n",
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;
}
skip_bits(gb, 4); /* video_object_layer_shape_extension */
}
- check_marker(gb, "before time_increment_resolution");
+ check_marker(s->avctx, gb, "before time_increment_resolution");
s->avctx->framerate.num = get_bits(gb, 16);
if (!s->avctx->framerate.num) {
if (ctx->time_increment_bits < 1)
ctx->time_increment_bits = 1;
- check_marker(gb, "before fixed_vop_rate");
+ check_marker(s->avctx, gb, "before fixed_vop_rate");
if (get_bits1(gb) != 0) /* fixed_vop_rate */
s->avctx->framerate.den = get_bits(gb, ctx->time_increment_bits);
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 */
ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter4v_blocks */
ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* not coded blocks */
}
- if (!check_marker(gb, "in complexity estimation part 1")) {
+ if (!check_marker(s->avctx, gb, "in complexity estimation part 1")) {
skip_bits_long(gb, pos - get_bits_count(gb));
goto no_cplx_est;
}
ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel2 */
ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel4 */
}
- if (!check_marker(gb, "in complexity estimation part 2")) {
+ if (!check_marker(s->avctx, gb, "in complexity estimation part 2")) {
skip_bits_long(gb, pos - get_bits_count(gb));
goto no_cplx_est;
}
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;
}
}
s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */
if (s->pict_type == AV_PICTURE_TYPE_B && s->low_delay &&
- ctx->vol_control_parameters == 0 && !(s->flags & CODEC_FLAG_LOW_DELAY)) {
+ ctx->vol_control_parameters == 0 && !(s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)) {
av_log(s->avctx, AV_LOG_ERROR, "low_delay flag set incorrectly, clearing it\n");
s->low_delay = 0;
}
while (get_bits1(gb) != 0)
time_incr++;
- check_marker(gb, "before time_increment");
+ check_marker(s->avctx, gb, "before time_increment");
if (ctx->time_increment_bits == 0 ||
!(show_bits(gb, ctx->time_increment_bits + 1) & 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);
}
}
- check_marker(gb, "before vop_coded");
+ check_marker(s->avctx, gb, "before vop_coded");
/* vop coded */
if (get_bits1(gb) != 1) {
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
}
end:
- if (s->flags & CODEC_FLAG_LOW_DELAY)
+ if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
s->low_delay = 1;
s->avctx->has_b_frames = !s->low_delay;
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;
av_fast_malloc(&s->bitstream_buffer,
&s->allocated_bitstream_buffer_size,
buf_size - current_pos +
- FF_INPUT_BUFFER_PADDING_SIZE);
+ AV_INPUT_BUFFER_PADDING_SIZE);
if (!s->bitstream_buffer)
return AVERROR(ENOMEM);
memcpy(s->bitstream_buffer, buf + current_pos,
if (!done) {
done = 1;
- ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
- ff_init_rl(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]);
- ff_init_rl(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]);
+ ff_rl_init(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
+ ff_rl_init(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]);
+ ff_rl_init(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]);
INIT_VLC_RL(ff_mpeg4_rl_intra, 554);
INIT_VLC_RL(ff_rvlc_rl_inter, 1072);
INIT_VLC_RL(ff_rvlc_rl_intra, 1072);
}
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 */
return 0;
}
-static const AVProfile mpeg4_video_profiles[] = {
- { FF_PROFILE_MPEG4_SIMPLE, "Simple Profile" },
- { FF_PROFILE_MPEG4_SIMPLE_SCALABLE, "Simple Scalable Profile" },
- { FF_PROFILE_MPEG4_CORE, "Core Profile" },
- { FF_PROFILE_MPEG4_MAIN, "Main Profile" },
- { FF_PROFILE_MPEG4_N_BIT, "N-bit Profile" },
- { FF_PROFILE_MPEG4_SCALABLE_TEXTURE, "Scalable Texture Profile" },
- { FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION, "Simple Face Animation Profile" },
- { FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE, "Basic Animated Texture Profile" },
- { FF_PROFILE_MPEG4_HYBRID, "Hybrid Profile" },
- { FF_PROFILE_MPEG4_ADVANCED_REAL_TIME, "Advanced Real Time Simple Profile" },
- { FF_PROFILE_MPEG4_CORE_SCALABLE, "Code Scalable Profile" },
- { FF_PROFILE_MPEG4_ADVANCED_CODING, "Advanced Coding Profile" },
- { FF_PROFILE_MPEG4_ADVANCED_CORE, "Advanced Core Profile" },
- { FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE, "Advanced Scalable Texture Profile" },
- { FF_PROFILE_MPEG4_SIMPLE_STUDIO, "Simple Studio Profile" },
- { FF_PROFILE_MPEG4_ADVANCED_SIMPLE, "Advanced Simple Profile" },
-};
-
AVCodec ff_mpeg4_decoder = {
.name = "mpeg4",
.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
.init = decode_init,
.close = ff_h263_decode_end,
.decode = ff_h263_decode_frame,
- .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
- CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
- CODEC_CAP_FRAME_THREADS,
+ .capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
+ AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY |
+ AV_CODEC_CAP_FRAME_THREADS,
.flush = ff_mpeg_flush,
.pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
- .profiles = NULL_IF_CONFIG_SMALL(mpeg4_video_profiles),
+ .profiles = NULL_IF_CONFIG_SMALL(ff_mpeg4_video_profiles),
.update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg4_update_thread_context),
};
projects / ffmpeg / blobdiff