/*
* copyright (c) 2001 Fabrice Bellard
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg 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,
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avutil.h"
#include "libavutil/buffer.h"
#include "libavutil/cpu.h"
+#include "libavutil/channel_layout.h"
#include "libavutil/dict.h"
#include "libavutil/frame.h"
#include "libavutil/log.h"
#include "version.h"
-#if FF_API_FAST_MALLOC
-// to provide fast_*alloc
-#include "libavutil/mem.h"
-#endif
-
/**
- * @defgroup libavc Encoding/Decoding Library
+ * @defgroup libavc libavcodec
+ * Encoding/Decoding Library
+ *
* @{
*
* @defgroup lavc_decoding Decoding
* - Send valid input:
* - For decoding, call avcodec_send_packet() to give the decoder raw
* compressed data in an AVPacket.
- * - For encoding, call avcodec_send_frame() to give the decoder an AVFrame
+ * - For encoding, call avcodec_send_frame() to give the encoder an AVFrame
* containing uncompressed audio or video.
* In both cases, it is recommended that AVPackets and AVFrames are
* refcounted, or libavcodec might have to copy the input data. (libavformat
* are filled. This situation is handled transparently if you follow the steps
* outlined above.
*
+ * In theory, sending input can result in EAGAIN - this should happen only if
+ * not all output was received. You can use this to structure alternative decode
+ * or encode loops other than the one suggested above. For example, you could
+ * try sending new input on each iteration, and try to receive output if that
+ * returns EAGAIN.
+ *
* End of stream situations. These require "flushing" (aka draining) the codec,
* as the codec might buffer multiple frames or packets internally for
* performance or out of necessity (consider B-frames).
*
* Not all codecs will follow a rigid and predictable dataflow; the only
* guarantee is that an AVERROR(EAGAIN) return value on a send/receive call on
- * one end implies that a receive/send call on the other end will succeed. In
- * general, no codec will permit unlimited buffering of input or output.
+ * one end implies that a receive/send call on the other end will succeed, or
+ * at least will not fail with AVERROR(EAGAIN). In general, no codec will
+ * permit unlimited buffering of input or output.
*
* This API replaces the following legacy functions:
* - avcodec_decode_video2() and avcodec_decode_audio4():
* Unlike with the old video decoding API, multiple frames might result from
* a packet. For audio, splitting the input packet into frames by partially
* decoding packets becomes transparent to the API user. You never need to
- * feed an AVPacket to the API twice.
+ * feed an AVPacket to the API twice (unless it is rejected with EAGAIN - then
+ * no data was read from the packet).
* Additionally, sending a flush/draining packet is required only once.
* - avcodec_encode_video2()/avcodec_encode_audio2():
* Use avcodec_send_frame() to feed input to the encoder, then use
* - The new API does not handle subtitles yet.
*
* Mixing new and old function calls on the same AVCodecContext is not allowed,
- * and will result in arbitrary behavior.
+ * and will result in undefined behavior.
*
* Some codecs might require using the new API; using the old API will return
- * an error when calling it.
+ * an error when calling it. All codecs support the new API.
+ *
+ * A codec is not allowed to return EAGAIN for both sending and receiving. This
+ * would be an invalid state, which could put the codec user into an endless
+ * loop. The API has no concept of time either: it cannot happen that trying to
+ * do avcodec_send_packet() results in EAGAIN, but a repeated call 1 second
+ * later accepts the packet (with no other receive/flush API calls involved).
+ * The API is a strict state machine, and the passage of time is not supposed
+ * to influence it. Some timing-dependent behavior might still be deemed
+ * acceptable in certain cases. But it must never result in both send/receive
+ * returning EAGAIN at the same time at any point. It must also absolutely be
+ * avoided that the current state is "unstable" and can "flip-flop" between
+ * the send/receive APIs allowing progress. For example, it's not allowed that
+ * the codec randomly decides that it actually wants to consume a packet now
+ * instead of returning a frame, after it just returned EAGAIN on an
+ * avcodec_send_packet() call.
* @}
*/
* details.
*
* If you add a codec ID to this list, add it so that
- * 1. no value of a existing codec ID changes (that would break ABI),
- * 2. it is as close as possible to similar codecs.
+ * 1. no value of an existing codec ID changes (that would break ABI),
+ * 2. it is as close as possible to similar codecs
*
* After adding new codec IDs, do not forget to add an entry to the codec
* descriptor list and bump libavcodec minor version.
AV_CODEC_ID_ANM,
AV_CODEC_ID_BINKVIDEO,
AV_CODEC_ID_IFF_ILBM,
- AV_CODEC_ID_IFF_BYTERUN1,
+#define AV_CODEC_ID_IFF_BYTERUN1 AV_CODEC_ID_IFF_ILBM
AV_CODEC_ID_KGV1,
AV_CODEC_ID_YOP,
AV_CODEC_ID_VP8,
AV_CODEC_ID_WEBP,
AV_CODEC_ID_HNM4_VIDEO,
AV_CODEC_ID_HEVC,
+#define AV_CODEC_ID_H265 AV_CODEC_ID_HEVC
AV_CODEC_ID_FIC,
AV_CODEC_ID_ALIAS_PIX,
AV_CODEC_ID_BRENDER_PIX,
AV_CODEC_ID_DXV,
AV_CODEC_ID_SCREENPRESSO,
AV_CODEC_ID_RSCC,
- AV_CODEC_ID_MAGICYUV,
+
+ AV_CODEC_ID_Y41P = 0x8000,
+ AV_CODEC_ID_AVRP,
+ AV_CODEC_ID_012V,
+ AV_CODEC_ID_AVUI,
+ AV_CODEC_ID_AYUV,
+ AV_CODEC_ID_TARGA_Y216,
+ AV_CODEC_ID_V308,
+ AV_CODEC_ID_V408,
+ AV_CODEC_ID_YUV4,
+ AV_CODEC_ID_AVRN,
+ AV_CODEC_ID_CPIA,
+ AV_CODEC_ID_XFACE,
+ AV_CODEC_ID_SNOW,
+ AV_CODEC_ID_SMVJPEG,
+ AV_CODEC_ID_APNG,
+ AV_CODEC_ID_DAALA,
+ AV_CODEC_ID_CFHD,
AV_CODEC_ID_TRUEMOTION2RT,
+ AV_CODEC_ID_M101,
+ AV_CODEC_ID_MAGICYUV,
+ AV_CODEC_ID_SHEERVIDEO,
+ AV_CODEC_ID_YLC,
+ AV_CODEC_ID_PSD,
+ AV_CODEC_ID_PIXLET,
+ AV_CODEC_ID_SPEEDHQ,
+ AV_CODEC_ID_FMVC,
+ AV_CODEC_ID_SCPR,
+ AV_CODEC_ID_CLEARVIDEO,
+ AV_CODEC_ID_XPM,
AV_CODEC_ID_AV1,
/* various PCM "codecs" */
AV_CODEC_ID_PCM_S32LE_PLANAR,
AV_CODEC_ID_PCM_S16BE_PLANAR,
+ AV_CODEC_ID_PCM_S64LE = 0x10800,
+ AV_CODEC_ID_PCM_S64BE,
+ AV_CODEC_ID_PCM_F16LE,
+ AV_CODEC_ID_PCM_F24LE,
+
/* various ADPCM codecs */
AV_CODEC_ID_ADPCM_IMA_QT = 0x11000,
AV_CODEC_ID_ADPCM_IMA_WAV,
AV_CODEC_ID_ADPCM_G722,
AV_CODEC_ID_ADPCM_IMA_APC,
AV_CODEC_ID_ADPCM_VIMA,
+#if FF_API_VIMA_DECODER
+ AV_CODEC_ID_VIMA = AV_CODEC_ID_ADPCM_VIMA,
+#endif
+
+ AV_CODEC_ID_ADPCM_AFC = 0x11800,
+ AV_CODEC_ID_ADPCM_IMA_OKI,
+ AV_CODEC_ID_ADPCM_DTK,
+ AV_CODEC_ID_ADPCM_IMA_RAD,
+ AV_CODEC_ID_ADPCM_G726LE,
+ AV_CODEC_ID_ADPCM_THP_LE,
+ AV_CODEC_ID_ADPCM_PSX,
+ AV_CODEC_ID_ADPCM_AICA,
+ AV_CODEC_ID_ADPCM_IMA_DAT4,
+ AV_CODEC_ID_ADPCM_MTAF,
/* AMR */
AV_CODEC_ID_AMR_NB = 0x12000,
AV_CODEC_ID_XAN_DPCM,
AV_CODEC_ID_SOL_DPCM,
+ AV_CODEC_ID_SDX2_DPCM = 0x14800,
+
/* audio codecs */
AV_CODEC_ID_MP2 = 0x15000,
AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
AV_CODEC_ID_ON2AVC,
AV_CODEC_ID_DSS_SP,
+ AV_CODEC_ID_FFWAVESYNTH = 0x15800,
+ AV_CODEC_ID_SONIC,
+ AV_CODEC_ID_SONIC_LS,
+ AV_CODEC_ID_EVRC,
+ AV_CODEC_ID_SMV,
+ AV_CODEC_ID_DSD_LSBF,
+ AV_CODEC_ID_DSD_MSBF,
+ AV_CODEC_ID_DSD_LSBF_PLANAR,
+ AV_CODEC_ID_DSD_MSBF_PLANAR,
+ AV_CODEC_ID_4GV,
+ AV_CODEC_ID_INTERPLAY_ACM,
+ AV_CODEC_ID_XMA1,
+ AV_CODEC_ID_XMA2,
+ AV_CODEC_ID_DST,
+ AV_CODEC_ID_ATRAC3AL,
+ AV_CODEC_ID_ATRAC3PAL,
+
/* subtitle codecs */
AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
AV_CODEC_ID_DVD_SUBTITLE = 0x17000,
AV_CODEC_ID_DVB_TELETEXT,
AV_CODEC_ID_SRT,
+ AV_CODEC_ID_MICRODVD = 0x17800,
+ AV_CODEC_ID_EIA_608,
+ AV_CODEC_ID_JACOSUB,
+ AV_CODEC_ID_SAMI,
+ AV_CODEC_ID_REALTEXT,
+ AV_CODEC_ID_STL,
+ AV_CODEC_ID_SUBVIEWER1,
+ AV_CODEC_ID_SUBVIEWER,
+ AV_CODEC_ID_SUBRIP,
+ AV_CODEC_ID_WEBVTT,
+ AV_CODEC_ID_MPL2,
+ AV_CODEC_ID_VPLAYER,
+ AV_CODEC_ID_PJS,
+ AV_CODEC_ID_ASS,
+ AV_CODEC_ID_HDMV_TEXT_SUBTITLE,
+
/* other specific kind of codecs (generally used for attachments) */
AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
AV_CODEC_ID_TTF = 0x18000,
+ AV_CODEC_ID_SCTE_35, ///< Contain timestamp estimated through PCR of program stream.
+ AV_CODEC_ID_BINTEXT = 0x18800,
+ AV_CODEC_ID_XBIN,
+ AV_CODEC_ID_IDF,
+ AV_CODEC_ID_OTF,
+ AV_CODEC_ID_SMPTE_KLV,
+ AV_CODEC_ID_DVD_NAV,
+ AV_CODEC_ID_TIMED_ID3,
+ AV_CODEC_ID_BIN_DATA,
+
+
AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
* Codec properties, a combination of AV_CODEC_PROP_* flags.
*/
int props;
+ /**
+ * MIME type(s) associated with the codec.
+ * May be NULL; if not, a NULL-terminated array of MIME types.
+ * The first item is always non-NULL and is the preferred MIME type.
+ */
+ const char *const *mime_types;
/**
* If non-NULL, an array of profiles recognized for this codec.
* Terminated with FF_PROFILE_UNKNOWN.
* equal.
*/
#define AV_CODEC_PROP_REORDER (1 << 3)
+/**
+ * Subtitle codec is bitmap based
+ * Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field.
+ */
+#define AV_CODEC_PROP_BITMAP_SUB (1 << 16)
+/**
+ * Subtitle codec is text based.
+ * Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field.
+ */
+#define AV_CODEC_PROP_TEXT_SUB (1 << 17)
/**
* @ingroup lavc_decoding
* Note: If the first 23 bits of the additional bytes are not 0, then damaged
* MPEG bitstreams could cause overread and segfault.
*/
-#define AV_INPUT_BUFFER_PADDING_SIZE 8
+#define AV_INPUT_BUFFER_PADDING_SIZE 32
/**
* @ingroup lavc_encoding
/**
* @deprecated use AV_INPUT_BUFFER_PADDING_SIZE instead
*/
-#define FF_INPUT_BUFFER_PADDING_SIZE 8
+#define FF_INPUT_BUFFER_PADDING_SIZE 32
/**
* @deprecated use AV_INPUT_BUFFER_MIN_SIZE instead
ME_HEX, ///< hexagon based search
ME_UMH, ///< uneven multi-hexagon search
ME_TESA, ///< transformed exhaustive search algorithm
+ ME_ITER=50, ///< iterative search
};
#endif
AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
AVDISCARD_NONREF = 8, ///< discard all non reference
AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
+ AVDISCARD_NONINTRA= 24, ///< discard all non intra frames
AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
AVDISCARD_ALL = 48, ///< discard all
};
* interlaced motion estimation
*/
#define AV_CODEC_FLAG_INTERLACED_ME (1 << 29)
-#define AV_CODEC_FLAG_CLOSED_GOP (1 << 31)
+#define AV_CODEC_FLAG_CLOSED_GOP (1U << 31)
/**
* Allow non spec compliant speedup tricks.
* Place global headers at every keyframe instead of in extradata.
*/
#define AV_CODEC_FLAG2_LOCAL_HEADER (1 << 3)
+
+/**
+ * timecode is in drop frame format. DEPRECATED!!!!
+ */
+#define AV_CODEC_FLAG2_DROP_FRAME_TIMECODE (1 << 13)
+
/**
* Input bitstream might be truncated at a packet boundaries
* instead of only at frame boundaries.
*/
#define AV_CODEC_FLAG2_IGNORE_CROP (1 << 16)
+/**
+ * Show all frames before the first keyframe
+ */
+#define AV_CODEC_FLAG2_SHOW_ALL (1 << 22)
+/**
+ * Export motion vectors through frame side data
+ */
+#define AV_CODEC_FLAG2_EXPORT_MVS (1 << 28)
+/**
+ * Do not skip samples and export skip information as frame side data
+ */
+#define AV_CODEC_FLAG2_SKIP_MANUAL (1 << 29)
+/**
+ * Do not reset ASS ReadOrder field on flush (subtitles decoding)
+ */
+#define AV_CODEC_FLAG2_RO_FLUSH_NOOP (1 << 30)
+
/* Unsupported options :
* Syntax Arithmetic coding (SAC)
* Reference Picture Selection
* This can be used to prevent truncation of the last audio samples.
*/
#define AV_CODEC_CAP_SMALL_LAST_FRAME (1 << 6)
+
+#if FF_API_CAP_VDPAU
+/**
+ * Codec can export data for HW decoding (VDPAU).
+ */
+#define AV_CODEC_CAP_HWACCEL_VDPAU (1 << 7)
+#endif
+
/**
* Codec can output multiple frames per AVPacket
* Normally demuxers return one frame at a time, demuxers which do not do
* Audio encoder supports receiving a different number of samples in each call.
*/
#define AV_CODEC_CAP_VARIABLE_FRAME_SIZE (1 << 16)
+/**
+ * Decoder is not a preferred choice for probing.
+ * This indicates that the decoder is not a good choice for probing.
+ * It could for example be an expensive to spin up hardware decoder,
+ * or it could simply not provide a lot of useful information about
+ * the stream.
+ * A decoder marked with this flag should only be used as last resort
+ * choice for probing.
+ */
+#define AV_CODEC_CAP_AVOID_PROBING (1 << 17)
+/**
+ * Codec is intra only.
+ */
+#define AV_CODEC_CAP_INTRA_ONLY 0x40000000
+/**
+ * Codec is lossless.
+ */
+#define AV_CODEC_CAP_LOSSLESS 0x80000000
+
#if FF_API_WITHOUT_PREFIX
/**
* Allow decoders to produce frames with data planes that are not aligned
* to CPU requirements (e.g. due to cropping).
*/
-#define CODEC_FLAG_UNALIGNED 0x0001
-#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale.
-#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263.
-#define CODEC_FLAG_OUTPUT_CORRUPT 0x0008 ///< Output even those frames that might be corrupted
-#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC.
+#define CODEC_FLAG_UNALIGNED AV_CODEC_FLAG_UNALIGNED
+#define CODEC_FLAG_QSCALE AV_CODEC_FLAG_QSCALE
+#define CODEC_FLAG_4MV AV_CODEC_FLAG_4MV
+#define CODEC_FLAG_OUTPUT_CORRUPT AV_CODEC_FLAG_OUTPUT_CORRUPT
+#define CODEC_FLAG_QPEL AV_CODEC_FLAG_QPEL
#if FF_API_GMC
/**
* @deprecated use the "gmc" private option of the libxvid encoder
*/
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
#endif
-#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode.
-#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode.
-#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
+#define CODEC_FLAG_PASS1 AV_CODEC_FLAG_PASS1
+#define CODEC_FLAG_PASS2 AV_CODEC_FLAG_PASS2
+#define CODEC_FLAG_GRAY AV_CODEC_FLAG_GRAY
#if FF_API_EMU_EDGE
/**
* @deprecated edges are not used/required anymore. I.e. this flag is now always
*/
#define CODEC_FLAG_EMU_EDGE 0x4000
#endif
-#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding.
-#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random
- location instead of only at frame boundaries. */
+#define CODEC_FLAG_PSNR AV_CODEC_FLAG_PSNR
+#define CODEC_FLAG_TRUNCATED AV_CODEC_FLAG_TRUNCATED
+
#if FF_API_NORMALIZE_AQP
/**
* @deprecated use the flag "naq" in the "mpv_flags" private option of the
*/
#define CODEC_FLAG_NORMALIZE_AQP 0x00020000
#endif
-#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
-#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 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
-#define CODEC_FLAG_CLOSED_GOP 0x80000000
-#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
-#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding.
-#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata.
-#define CODEC_FLAG2_IGNORE_CROP 0x00010000 ///< Discard cropping information from SPS.
-
-#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
+#define CODEC_FLAG_INTERLACED_DCT AV_CODEC_FLAG_INTERLACED_DCT
+#define CODEC_FLAG_LOW_DELAY AV_CODEC_FLAG_LOW_DELAY
+#define CODEC_FLAG_GLOBAL_HEADER AV_CODEC_FLAG_GLOBAL_HEADER
+#define CODEC_FLAG_BITEXACT AV_CODEC_FLAG_BITEXACT
+#define CODEC_FLAG_AC_PRED AV_CODEC_FLAG_AC_PRED
+#define CODEC_FLAG_LOOP_FILTER AV_CODEC_FLAG_LOOP_FILTER
+#define CODEC_FLAG_INTERLACED_ME AV_CODEC_FLAG_INTERLACED_ME
+#define CODEC_FLAG_CLOSED_GOP AV_CODEC_FLAG_CLOSED_GOP
+#define CODEC_FLAG2_FAST AV_CODEC_FLAG2_FAST
+#define CODEC_FLAG2_NO_OUTPUT AV_CODEC_FLAG2_NO_OUTPUT
+#define CODEC_FLAG2_LOCAL_HEADER AV_CODEC_FLAG2_LOCAL_HEADER
+#define CODEC_FLAG2_DROP_FRAME_TIMECODE AV_CODEC_FLAG2_DROP_FRAME_TIMECODE
+#define CODEC_FLAG2_IGNORE_CROP AV_CODEC_FLAG2_IGNORE_CROP
+
+#define CODEC_FLAG2_CHUNKS AV_CODEC_FLAG2_CHUNKS
+#define CODEC_FLAG2_SHOW_ALL AV_CODEC_FLAG2_SHOW_ALL
+#define CODEC_FLAG2_EXPORT_MVS AV_CODEC_FLAG2_EXPORT_MVS
+#define CODEC_FLAG2_SKIP_MANUAL AV_CODEC_FLAG2_SKIP_MANUAL
/* Unsupported options :
* Syntax Arithmetic coding (SAC)
/* /Fx */
/* codec capabilities */
-#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
+#define CODEC_CAP_DRAW_HORIZ_BAND AV_CODEC_CAP_DRAW_HORIZ_BAND ///< Decoder can use draw_horiz_band callback.
/**
* Codec uses get_buffer() for allocating buffers and supports custom allocators.
* If not set, it might not use get_buffer() at all or use operations that
* assume the buffer was allocated by avcodec_default_get_buffer.
*/
-#define CODEC_CAP_DR1 0x0002
-#define CODEC_CAP_TRUNCATED 0x0008
+#define CODEC_CAP_DR1 AV_CODEC_CAP_DR1
+#define CODEC_CAP_TRUNCATED AV_CODEC_CAP_TRUNCATED
#if FF_API_XVMC
-/* Codec can export data for HW decoding (XvMC). */
+/* Codec can export data for HW decoding. This flag indicates that
+ * the codec would call get_format() with list that might contain HW accelerated
+ * pixel formats (XvMC, VDPAU, VAAPI, etc). The application can pick any of them
+ * including raw image format.
+ * The application can use the passed context to determine bitstream version,
+ * chroma format, resolution etc.
+ */
#define CODEC_CAP_HWACCEL 0x0010
#endif /* FF_API_XVMC */
/**
* each output packet. If this flag is not set, the pts and duration will
* be determined by libavcodec from the input frame.
*/
-#define CODEC_CAP_DELAY 0x0020
+#define CODEC_CAP_DELAY AV_CODEC_CAP_DELAY
/**
* Codec can be fed a final frame with a smaller size.
* This can be used to prevent truncation of the last audio samples.
*/
-#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
+#define CODEC_CAP_SMALL_LAST_FRAME AV_CODEC_CAP_SMALL_LAST_FRAME
#if FF_API_CAP_VDPAU
/**
* Codec can export data for HW decoding (VDPAU).
*/
-#define CODEC_CAP_HWACCEL_VDPAU 0x0080
+#define CODEC_CAP_HWACCEL_VDPAU AV_CODEC_CAP_HWACCEL_VDPAU
#endif
/**
* Codec can output multiple frames per AVPacket
* prohibiting stream copy in many cases thus it should only be considered
* as a last resort.
*/
-#define CODEC_CAP_SUBFRAMES 0x0100
+#define CODEC_CAP_SUBFRAMES AV_CODEC_CAP_SUBFRAMES
/**
* Codec is experimental and is thus avoided in favor of non experimental
* encoders
*/
-#define CODEC_CAP_EXPERIMENTAL 0x0200
+#define CODEC_CAP_EXPERIMENTAL AV_CODEC_CAP_EXPERIMENTAL
/**
* Codec should fill in channel configuration and samplerate instead of container
*/
-#define CODEC_CAP_CHANNEL_CONF 0x0400
+#define CODEC_CAP_CHANNEL_CONF AV_CODEC_CAP_CHANNEL_CONF
#if FF_API_NEG_LINESIZES
/**
* @deprecated no codecs use this capability
/**
* Codec supports frame-level multithreading.
*/
-#define CODEC_CAP_FRAME_THREADS 0x1000
+#define CODEC_CAP_FRAME_THREADS AV_CODEC_CAP_FRAME_THREADS
/**
* Codec supports slice-based (or partition-based) multithreading.
*/
-#define CODEC_CAP_SLICE_THREADS 0x2000
+#define CODEC_CAP_SLICE_THREADS AV_CODEC_CAP_SLICE_THREADS
/**
* Codec supports changed parameters at any point.
*/
-#define CODEC_CAP_PARAM_CHANGE 0x4000
+#define CODEC_CAP_PARAM_CHANGE AV_CODEC_CAP_PARAM_CHANGE
/**
* Codec supports avctx->thread_count == 0 (auto).
*/
-#define CODEC_CAP_AUTO_THREADS 0x8000
+#define CODEC_CAP_AUTO_THREADS AV_CODEC_CAP_AUTO_THREADS
/**
* Audio encoder supports receiving a different number of samples in each call.
*/
-#define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000
+#define CODEC_CAP_VARIABLE_FRAME_SIZE AV_CODEC_CAP_VARIABLE_FRAME_SIZE
+/**
+ * Codec is intra only.
+ */
+#define CODEC_CAP_INTRA_ONLY AV_CODEC_CAP_INTRA_ONLY
+/**
+ * Codec is lossless.
+ */
+#define CODEC_CAP_LOSSLESS AV_CODEC_CAP_LOSSLESS
+
+/**
+ * HWAccel is experimental and is thus avoided in favor of non experimental
+ * codecs
+ */
+#define HWACCEL_CODEC_CAP_EXPERIMENTAL 0x0200
#endif /* FF_API_WITHOUT_PREFIX */
#if FF_API_MB_TYPE
AV_PKT_DATA_AUDIO_SERVICE_TYPE,
/**
- * This side data contains an integer value representing the quality
- * factor of the compressed frame. Allowed range is between 1 (good)
- * and FF_LAMBDA_MAX (bad).
+ * This side data contains quality related information from the encoder.
+ * @code
+ * u32le quality factor of the compressed frame. Allowed range is between 1 (good) and FF_LAMBDA_MAX (bad).
+ * u8 picture type
+ * u8 error count
+ * u16 reserved
+ * u64le[error count] sum of squared differences between encoder in and output
+ * @endcode
*/
- AV_PKT_DATA_QUALITY_FACTOR,
+ AV_PKT_DATA_QUALITY_STATS,
/**
* This side data contains an integer value representing the stream index
* This side data corresponds to the AVCPBProperties struct.
*/
AV_PKT_DATA_CPB_PROPERTIES,
+
+ /**
+ * Recommmends skipping the specified number of samples
+ * @code
+ * u32le number of samples to skip from start of this packet
+ * u32le number of samples to skip from end of this packet
+ * u8 reason for start skip
+ * u8 reason for end skip (0=padding silence, 1=convergence)
+ * @endcode
+ */
+ AV_PKT_DATA_SKIP_SAMPLES=70,
+
+ /**
+ * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that
+ * the packet may contain "dual mono" audio specific to Japanese DTV
+ * and if it is true, recommends only the selected channel to be used.
+ * @code
+ * u8 selected channels (0=mail/left, 1=sub/right, 2=both)
+ * @endcode
+ */
+ AV_PKT_DATA_JP_DUALMONO,
+
+ /**
+ * A list of zero terminated key/value strings. There is no end marker for
+ * the list, so it is required to rely on the side data size to stop.
+ */
+ AV_PKT_DATA_STRINGS_METADATA,
+
+ /**
+ * Subtitle event position
+ * @code
+ * u32le x1
+ * u32le y1
+ * u32le x2
+ * u32le y2
+ * @endcode
+ */
+ AV_PKT_DATA_SUBTITLE_POSITION,
+
+ /**
+ * Data found in BlockAdditional element of matroska container. There is
+ * no end marker for the data, so it is required to rely on the side data
+ * size to recognize the end. 8 byte id (as found in BlockAddId) followed
+ * by data.
+ */
+ AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
+
+ /**
+ * The optional first identifier line of a WebVTT cue.
+ */
+ AV_PKT_DATA_WEBVTT_IDENTIFIER,
+
+ /**
+ * The optional settings (rendering instructions) that immediately
+ * follow the timestamp specifier of a WebVTT cue.
+ */
+ AV_PKT_DATA_WEBVTT_SETTINGS,
+
+ /**
+ * A list of zero terminated key/value strings. There is no end marker for
+ * the list, so it is required to rely on the side data size to stop. This
+ * side data includes updated metadata which appeared in the stream.
+ */
+ AV_PKT_DATA_METADATA_UPDATE,
+
+ /**
+ * MPEGTS stream ID, this is required to pass the stream ID
+ * information from the demuxer to the corresponding muxer.
+ */
+ AV_PKT_DATA_MPEGTS_STREAM_ID,
+
+ /**
+ * Mastering display metadata (based on SMPTE-2086:2014). This metadata
+ * should be associated with a video stream and containts data in the form
+ * of the AVMasteringDisplayMetadata struct.
+ */
+ AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
+
+ /**
+ * This side data should be associated with a video stream and corresponds
+ * to the AVSphericalMapping structure.
+ */
+ AV_PKT_DATA_SPHERICAL,
};
+#define AV_PKT_DATA_QUALITY_FACTOR AV_PKT_DATA_QUALITY_STATS //DEPRECATED
+
typedef struct AVPacketSideData {
uint8_t *data;
int size;
* packets, with no compressed data, containing only side data
* (e.g. to update some stream parameters at the end of encoding).
*
- * AVPacket is one of the few structs in Libav, whose size is a part of public
+ * AVPacket is one of the few structs in FFmpeg, whose size is a part of public
* ABI. Thus it may be allocated on stack and no new fields can be added to it
* without libavcodec and libavformat major bump.
*
} AVPacket;
#define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe
#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
+/**
+ * Flag is used to discard packets which are required to maintain valid
+ * decoder state but are not required for output and should be dropped
+ * after decoding.
+ **/
+#define AV_PKT_FLAG_DISCARD 0x0004
enum AVSideDataParamChangeFlags {
AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001,
* New fields can be added to the end with minor version bumps.
* Removal, reordering and changes to existing fields require a major
* version bump.
+ * You can use AVOptions (av_opt* / av_set/get*()) to access these fields from user
+ * applications.
+ * The name string for AVOptions options matches the associated command line
+ * parameter name and can be found in libavcodec/options_table.h
+ * The AVOption/command line parameter names differ in some cases from the C
+ * structure field names for historic reasons or brevity.
* sizeof(AVCodecContext) must not be used outside libav*.
*/
typedef struct AVCodecContext {
/**
* the average bitrate
* - encoding: Set by user; unused for constant quantizer encoding.
- * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
+ * - decoding: Set by user, may be overwritten by libavcodec
+ * if this info is available in the stream
*/
- int bit_rate;
+ int64_t bit_rate;
/**
* number of bits the bitstream is allowed to diverge from the reference.
* of which frame timestamps are represented. For fixed-fps content,
* timebase should be 1/framerate and timestamp increments should be
* identically 1.
+ * This often, but not always is the inverse of the frame rate or field rate
+ * for video. 1/time_base is not the average frame rate if the frame rate is not
+ * constant.
+ *
+ * Like containers, elementary streams also can store timestamps, 1/time_base
+ * is the unit in which these timestamps are specified.
+ * As example of such codec time base see ISO/IEC 14496-2:2001(E)
+ * vop_time_increment_resolution and fixed_vop_rate
+ * (fixed_vop_rate == 0 implies that it is different from the framerate)
+ *
* - encoding: MUST be set by user.
* - decoding: the use of this field for decoding is deprecated.
* Use framerate instead.
/**
* Codec delay.
*
+ * Encoding: Number of frames delay there will be from the encoder input to
+ * the decoder output. (we assume the decoder matches the spec)
+ * Decoding: Number of frames delay in addition to what a standard decoder
+ * as specified in the spec would produce.
+ *
* Video:
* Number of frames the decoded output will be delayed relative to the
* encoded input.
/**
* Bitstream width / height, may be different from width/height e.g. when
- * the decoded frame is cropped before being output.
+ * the decoded frame is cropped before being output or lowres is enabled.
*
* @note Those field may not match the value of the last
* AVFrame output by avcodec_receive_frame() due frame
* - decoding: unused
*/
int ildct_cmp;
-#define FF_CMP_SAD 0
-#define FF_CMP_SSE 1
-#define FF_CMP_SATD 2
-#define FF_CMP_DCT 3
-#define FF_CMP_PSNR 4
-#define FF_CMP_BIT 5
-#define FF_CMP_RD 6
-#define FF_CMP_ZERO 7
-#define FF_CMP_VSAD 8
-#define FF_CMP_VSSE 9
-#define FF_CMP_NSSE 10
-#define FF_CMP_DCTMAX 13
-#define FF_CMP_DCT264 14
-#define FF_CMP_CHROMA 256
+#define FF_CMP_SAD 0
+#define FF_CMP_SSE 1
+#define FF_CMP_SATD 2
+#define FF_CMP_DCT 3
+#define FF_CMP_PSNR 4
+#define FF_CMP_BIT 5
+#define FF_CMP_RD 6
+#define FF_CMP_ZERO 7
+#define FF_CMP_VSAD 8
+#define FF_CMP_VSSE 9
+#define FF_CMP_NSSE 10
+#define FF_CMP_W53 11
+#define FF_CMP_W97 12
+#define FF_CMP_DCTMAX 13
+#define FF_CMP_DCT264 14
+#define FF_CMP_MEDIAN_SAD 15
+#define FF_CMP_CHROMA 256
/**
* ME diamond size & shape
* XVideo Motion Acceleration
* - encoding: forbidden
* - decoding: set by decoder
- * @deprecated XvMC support is slated for removal.
+ * @deprecated XvMC doesn't need it anymore.
*/
attribute_deprecated int xvmc_acceleration;
#endif /* FF_API_XVMC */
/**
* precision of the intra DC coefficient - 8
* - encoding: Set by user.
- * - decoding: unused
+ * - decoding: Set by libavcodec
*/
int intra_dc_precision;
/** Field order
* - encoding: set by libavcodec
- * - decoding: Set by libavcodec
+ * - decoding: Set by user.
*/
enum AVFieldOrder field_order;
/**
* Audio channel layout.
* - encoding: set by user.
- * - decoding: set by libavcodec.
+ * - decoding: set by user, may be overwritten by libavcodec.
*/
uint64_t channel_layout;
enum AVAudioServiceType audio_service_type;
/**
- * Used to request a sample format from the decoder.
- * - encoding: unused.
+ * desired sample format
+ * - encoding: Not used.
* - decoding: Set by user.
+ * Decoder will decode to this format if it can.
*/
enum AVSampleFormat request_sample_fmt;
* avcodec_align_dimensions2() should be used to find the required width and
* height, as they normally need to be rounded up to the next multiple of 16.
*
+ * Some decoders do not support linesizes changing between frames.
+ *
* If frame multithreading is used and thread_safe_callbacks is set,
* this callback may be called from a different thread, but not from more
* than one at once. Does not need to be reentrant.
/**
* maximum bitrate
* - encoding: Set by user.
- * - decoding: unused
+ * - decoding: Set by user, may be overwritten by libavcodec.
*/
- int rc_max_rate;
+ int64_t rc_max_rate;
/**
* minimum bitrate
* - encoding: Set by user.
* - decoding: unused
*/
- int rc_min_rate;
+ int64_t rc_min_rate;
#if FF_API_MPV_OPT
/**
#define FF_BUG_DC_CLIP 4096
#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
#define FF_BUG_TRUNCATED 16384
+#define FF_BUG_IEDGE 32768
/**
* strictly follow the standard (MPEG-4, ...).
int error_concealment;
#define FF_EC_GUESS_MVS 1
#define FF_EC_DEBLOCK 2
+#define FF_EC_FAVOR_INTER 256
/**
* debug
#endif
#define FF_DEBUG_BUFFERS 0x00008000
#define FF_DEBUG_THREADS 0x00010000
+#define FF_DEBUG_GREEN_MD 0x00800000
+#define FF_DEBUG_NOMC 0x01000000
#if FF_API_DEBUG_MV
/**
- * @deprecated this option does not have any effect
+ * debug
+ * - encoding: Set by user.
+ * - decoding: Set by user.
*/
- 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
* decoder returning an error.
*/
#define AV_EF_CRCCHECK (1<<0)
-#define AV_EF_BITSTREAM (1<<1)
-#define AV_EF_BUFFER (1<<2)
-#define AV_EF_EXPLODE (1<<3)
+#define AV_EF_BITSTREAM (1<<1) ///< detect bitstream specification deviations
+#define AV_EF_BUFFER (1<<2) ///< detect improper bitstream length
+#define AV_EF_EXPLODE (1<<3) ///< abort decoding on minor error detection
+
+#define AV_EF_IGNORE_ERR (1<<15) ///< ignore errors and continue
+#define AV_EF_CAREFUL (1<<16) ///< consider things that violate the spec, are fast to calculate and have not been seen in the wild as errors
+#define AV_EF_COMPLIANT (1<<17) ///< consider all spec non compliances as errors
+#define AV_EF_AGGRESSIVE (1<<18) ///< consider things that a sane encoder should not do as an error
+
/**
* opaque 64-bit number (generally a PTS) that will be reordered and
* Hardware accelerator context.
* For some hardware accelerators, a global context needs to be
* provided by the user. In that case, this holds display-dependent
- * data Libav cannot instantiate itself. Please refer to the
- * Libav HW accelerator documentation to know how to fill this
+ * data FFmpeg cannot instantiate itself. Please refer to the
+ * FFmpeg HW accelerator documentation to know how to fill this
* is. e.g. for VA API, this is a struct vaapi_context.
* - encoding: unused
* - decoding: Set by user
#if FF_API_ARCH_ALPHA
#define FF_IDCT_SIMPLEALPHA 23
#endif
+#define FF_IDCT_SIMPLEAUTO 128
/**
* bits per sample/pixel from the demuxer (needed for huffyuv).
* low resolution decoding, 1-> 1/2 size, 2->1/4 size
* - encoding: unused
* - decoding: Set by user.
- *
- * @deprecated use decoder private options instead
*/
- attribute_deprecated int lowres;
+ int lowres;
#endif
#if FF_API_CODED_FRAME
#define FF_PROFILE_MPEG2_AAC_LOW 128
#define FF_PROFILE_MPEG2_AAC_HE 131
+#define FF_PROFILE_DNXHD 0
+#define FF_PROFILE_DNXHR_LB 1
+#define FF_PROFILE_DNXHR_SQ 2
+#define FF_PROFILE_DNXHR_HQ 3
+#define FF_PROFILE_DNXHR_HQX 4
+#define FF_PROFILE_DNXHR_444 5
+
#define FF_PROFILE_DTS 20
#define FF_PROFILE_DTS_ES 30
#define FF_PROFILE_DTS_96_24 40
#define FF_LEVEL_UNKNOWN -99
/**
+ * Skip loop filtering for selected frames.
* - encoding: unused
* - decoding: Set by user.
*/
enum AVDiscard skip_loop_filter;
/**
+ * Skip IDCT/dequantization for selected frames.
* - encoding: unused
* - decoding: Set by user.
*/
enum AVDiscard skip_idct;
/**
+ * Skip decoding for selected frames.
* - encoding: unused
* - decoding: Set by user.
*/
*/
int initial_padding;
- /*
+ /**
* - decoding: For codecs that store a framerate value in the compressed
* bitstream, the decoder may export it here. { 0, 1} when
* unknown.
*/
enum AVPixelFormat sw_pix_fmt;
+ /**
+ * Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
+ * - encoding unused.
+ * - decoding set by user.
+ */
+ AVRational pkt_timebase;
+
+ /**
+ * AVCodecDescriptor
+ * - encoding: unused.
+ * - decoding: set by libavcodec.
+ */
+ const AVCodecDescriptor *codec_descriptor;
+
+#if !FF_API_LOWRES
+ /**
+ * low resolution decoding, 1-> 1/2 size, 2->1/4 size
+ * - encoding: unused
+ * - decoding: Set by user.
+ */
+ int lowres;
+#endif
+
+ /**
+ * Current statistics for PTS correction.
+ * - decoding: maintained and used by libavcodec, not intended to be used by user apps
+ * - encoding: unused
+ */
+ int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far
+ int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far
+ int64_t pts_correction_last_pts; /// PTS of the last frame
+ int64_t pts_correction_last_dts; /// DTS of the last frame
+
+ /**
+ * Character encoding of the input subtitles file.
+ * - decoding: set by user
+ * - encoding: unused
+ */
+ char *sub_charenc;
+
+ /**
+ * Subtitles character encoding mode. Formats or codecs might be adjusting
+ * this setting (if they are doing the conversion themselves for instance).
+ * - decoding: set by libavcodec
+ * - encoding: unused
+ */
+ int sub_charenc_mode;
+#define FF_SUB_CHARENC_MODE_DO_NOTHING -1 ///< do nothing (demuxer outputs a stream supposed to be already in UTF-8, or the codec is bitmap for instance)
+#define FF_SUB_CHARENC_MODE_AUTOMATIC 0 ///< libavcodec will select the mode itself
+#define FF_SUB_CHARENC_MODE_PRE_DECODER 1 ///< the AVPacket data needs to be recoded to UTF-8 before being fed to the decoder, requires iconv
+
+ /**
+ * Skip processing alpha if supported by codec.
+ * Note that if the format uses pre-multiplied alpha (common with VP6,
+ * and recommended due to better video quality/compression)
+ * the image will look as if alpha-blended onto a black background.
+ * However for formats that do not use pre-multiplied alpha
+ * there might be serious artefacts (though e.g. libswscale currently
+ * assumes pre-multiplied alpha anyway).
+ *
+ * - decoding: set by user
+ * - encoding: unused
+ */
+ int skip_alpha;
+
+ /**
+ * Number of samples to skip after a discontinuity
+ * - decoding: unused
+ * - encoding: set by libavcodec
+ */
+ int seek_preroll;
+
+#if !FF_API_DEBUG_MV
+ /**
+ * debug motion vectors
+ * - encoding: Set by user.
+ * - decoding: Set by user.
+ */
+ 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
+#endif
+
+ /**
+ * custom intra quantization matrix
+ * - encoding: Set by user, can be NULL.
+ * - decoding: unused.
+ */
+ uint16_t *chroma_intra_matrix;
+
+ /**
+ * dump format separator.
+ * can be ", " or "\n " or anything else
+ * - encoding: Set by user.
+ * - decoding: Set by user.
+ */
+ uint8_t *dump_separator;
+
+ /**
+ * ',' separated list of allowed decoders.
+ * If NULL then all are allowed
+ * - encoding: unused
+ * - decoding: set by user
+ */
+ char *codec_whitelist;
+
+ /*
+ * Properties of the stream that gets decoded
+ * - encoding: unused
+ * - decoding: set by libavcodec
+ */
+ unsigned properties;
+#define FF_CODEC_PROPERTY_LOSSLESS 0x00000001
+#define FF_CODEC_PROPERTY_CLOSED_CAPTIONS 0x00000002
+
/**
* Additional data associated with the entire coded stream.
*
/**
* A reference to the AVHWFramesContext describing the input (for encoding)
* or output (decoding) frames. The reference is set by the caller and
- * afterwards owned (and freed) by libavcodec.
+ * afterwards owned (and freed) by libavcodec - it should never be read by
+ * the caller after being set.
*
* - decoding: This field should be set by the caller from the get_format()
* callback. The previous reference (if any) will always be
* This field should be set before avcodec_open2() is called.
*/
AVBufferRef *hw_frames_ctx;
+
+ /**
+ * Control the form of AVSubtitle.rects[N]->ass
+ * - decoding: set by user
+ * - encoding: unused
+ */
+ int sub_text_format;
+#define FF_SUB_TEXT_FMT_ASS 0
+#if FF_API_ASS_TIMING
+#define FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS 1
+#endif
+
+ /**
+ * Audio only. The amount of padding (in samples) appended by the encoder to
+ * the end of the audio. I.e. this number of decoded samples must be
+ * discarded by the caller from the end of the stream to get the original
+ * audio without any trailing padding.
+ *
+ * - decoding: unused
+ * - encoding: unused
+ */
+ int trailing_padding;
+
+ /**
+ * The number of pixels per image to maximally accept.
+ *
+ * - decoding: set by user
+ * - encoding: set by user
+ */
+ int64_t max_pixels;
+
+ /**
+ * A reference to the AVHWDeviceContext describing the device which will
+ * be used by a hardware encoder/decoder. The reference is set by the
+ * caller and afterwards owned (and freed) by libavcodec.
+ *
+ * This should be used if either the codec device does not require
+ * hardware frames or any that are used are to be allocated internally by
+ * libavcodec. If the user wishes to supply any of the frames used as
+ * encoder input or decoder output then hw_frames_ctx should be used
+ * instead. When hw_frames_ctx is set in get_format() for a decoder, this
+ * field will be ignored while decoding the associated stream segment, but
+ * may again be used on a following one after another get_format() call.
+ *
+ * For both encoders and decoders this field should be set before
+ * avcodec_open2() is called and must not be written to thereafter.
+ *
+ * Note that some decoders may require this field to be set initially in
+ * order to support hw_frames_ctx at all - in that case, all frames
+ * contexts used must be created on the same device.
+ */
+ AVBufferRef *hw_device_ctx;
+
+ /**
+ * Bit set of AV_HWACCEL_FLAG_* flags, which affect hardware accelerated
+ * decoding (if active).
+ * - encoding: unused
+ * - decoding: Set by user (either before avcodec_open2(), or in the
+ * AVCodecContext.get_format callback)
+ */
+ int hwaccel_flags;
} AVCodecContext;
+AVRational av_codec_get_pkt_timebase (const AVCodecContext *avctx);
+void av_codec_set_pkt_timebase (AVCodecContext *avctx, AVRational val);
+
+const AVCodecDescriptor *av_codec_get_codec_descriptor(const AVCodecContext *avctx);
+void av_codec_set_codec_descriptor(AVCodecContext *avctx, const AVCodecDescriptor *desc);
+
+unsigned av_codec_get_codec_properties(const AVCodecContext *avctx);
+
+int av_codec_get_lowres(const AVCodecContext *avctx);
+void av_codec_set_lowres(AVCodecContext *avctx, int val);
+
+int av_codec_get_seek_preroll(const AVCodecContext *avctx);
+void av_codec_set_seek_preroll(AVCodecContext *avctx, int val);
+
+uint16_t *av_codec_get_chroma_intra_matrix(const AVCodecContext *avctx);
+void av_codec_set_chroma_intra_matrix(AVCodecContext *avctx, uint16_t *val);
+
/**
* AVProfile.
*/
const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
-#if FF_API_LOWRES
- attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
-#endif
+ uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
const AVClass *priv_class; ///< AVClass for the private context
const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
int caps_internal;
} AVCodec;
+int av_codec_get_max_lowres(const AVCodec *codec);
+
+struct MpegEncContext;
+
/**
* @defgroup lavc_hwaccel AVHWAccel
* @{
/**
* Hardware accelerated codec capabilities.
- * see FF_HWACCEL_CODEC_CAP_*
+ * see HWACCEL_CODEC_CAP_*
*/
int capabilities;
*
* Meaningful slice information (codec specific) is guaranteed to
* be parsed at this point. This function is mandatory.
+ * The only exception is XvMC, that works on MB level.
*
* @param avctx the codec context
* @param buf the slice data buffer base
*/
int frame_priv_data_size;
+ /**
+ * Called for every Macroblock in a slice.
+ *
+ * XvMC uses it to replace the ff_mpv_decode_mb().
+ * Instead of decoding to raw picture, MB parameters are
+ * stored in an array provided by the video driver.
+ *
+ * @param s the mpeg context
+ */
+ void (*decode_mb)(struct MpegEncContext *s);
+
/**
* Initialize the hwaccel private data.
*
* AVCodecInternal.hwaccel_priv_data.
*/
int priv_data_size;
+
+ /**
+ * Internal hwaccel capabilities.
+ */
+ int caps_internal;
} AVHWAccel;
/**
* Hardware acceleration should be used for decoding even if the codec level
* used is unknown or higher than the maximum supported level reported by the
* hardware driver.
+ *
+ * It's generally a good idea to pass this flag unless you have a specific
+ * reason not to, as hardware tends to under-report supported levels.
*/
#define AV_HWACCEL_FLAG_IGNORE_LEVEL (1 << 0)
*/
/**
- * four components are given, that's all.
- * the last component is alpha
- * @deprecated Use the imgutils functions
+ * Picture data structure.
+ *
+ * Up to four components can be stored into it, the last component is
+ * alpha.
+ * @deprecated use AVFrame or imgutils functions instead
*/
typedef struct AVPicture {
attribute_deprecated
- uint8_t *data[AV_NUM_DATA_POINTERS];
+ uint8_t *data[AV_NUM_DATA_POINTERS]; ///< pointers to the image data planes
attribute_deprecated
int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line
} AVPicture;
*/
#endif
-#define AVPALETTE_SIZE 1024
-#define AVPALETTE_COUNT 256
-
enum AVSubtitleType {
SUBTITLE_NONE,
* struct.
*/
char *ass;
+
int flags;
} AVSubtitleRect;
/**
* The average bitrate of the encoded data (in bits per second).
*/
- int bit_rate;
+ int64_t bit_rate;
+ /**
+ * The number of bits per sample in the codedwords.
+ *
+ * This is basically the bitrate per sample. It is mandatory for a bunch of
+ * formats to actually decode them. It's the number of bits for one sample in
+ * the actual coded bitstream.
+ *
+ * This could be for example 4 for ADPCM
+ * For PCM formats this matches bits_per_raw_sample
+ * Can be 0
+ */
int bits_per_coded_sample;
+ /**
+ * This is the number of valid bits in each output sample. If the
+ * sample format has more bits, the least significant bits are additional
+ * padding bits, which are always 0. Use right shifts to reduce the sample
+ * to its actual size. For example, audio formats with 24 bit samples will
+ * have bits_per_raw_sample set to 24, and format set to AV_SAMPLE_FMT_S32.
+ * To get the original sample use "(int32_t)sample >> 8"."
+ *
+ * For ADPCM this might be 12 or 16 or similar
+ * Can be 0
+ */
+ int bits_per_raw_sample;
+
/**
* Codec-specific bitstream restrictions that the stream conforms to.
*/
enum AVColorSpace color_space;
enum AVChromaLocation chroma_location;
+ /**
+ * Video only. Number of delayed frames.
+ */
+ int video_delay;
+
/**
* Audio only. The channel layout bitmask. May be 0 if the channel layout is
* unknown or unspecified, otherwise the number of bits set must be equal to
* Corresponds to nBlockAlign in WAVEFORMATEX.
*/
int block_align;
+ /**
+ * Audio only. Audio frame size, if known. Required by some formats to be static.
+ */
+ int frame_size;
/**
* Audio only. The amount of padding (in samples) inserted by the encoder at
* audio without any trailing padding.
*/
int trailing_padding;
+ /**
+ * Audio only. Number of samples to skip after a discontinuity.
+ */
+ int seek_preroll;
} AVCodecParameters;
/**
const AVClass *avcodec_get_class(void);
#if FF_API_COPY_CONTEXT
+/**
+ * Get the AVClass for AVFrame. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
+ *
+ * @see av_opt_find().
+ */
+const AVClass *avcodec_get_frame_class(void);
+
+/**
+ * Get the AVClass for AVSubtitleRect. It can be used in combination with
+ * AV_OPT_SEARCH_FAKE_OBJ for examining options.
+ *
+ * @see av_opt_find().
+ */
+const AVClass *avcodec_get_subtitle_rect_class(void);
+
/**
* Copy the settings of the source AVCodecContext into the destination
* AVCodecContext. The resulting destination codec context will be
* can use this AVCodecContext to decode/encode video/audio data.
*
* @param dest target codec context, should be initialized with
- * avcodec_alloc_context3(), but otherwise uninitialized
+ * avcodec_alloc_context3(NULL), but otherwise uninitialized
* @param src source codec context
* @return AVERROR() on error (e.g. memory allocation error), 0 on success
*
*/
attribute_deprecated
int av_dup_packet(AVPacket *pkt);
+/**
+ * Copy packet, including contents
+ *
+ * @return 0 on success, negative AVERROR on fail
+ */
+int av_copy_packet(AVPacket *dst, const AVPacket *src);
+
+/**
+ * Copy packet side data
+ *
+ * @return 0 on success, negative AVERROR on fail
+ */
+int av_copy_packet_side_data(AVPacket *dst, const AVPacket *src);
+
/**
* Free a packet.
*
* @param size pointer for side information size to store (optional)
* @return pointer to data if present or NULL otherwise
*/
-uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+uint8_t* av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type,
int *size);
+#if FF_API_MERGE_SD_API
+attribute_deprecated
+int av_packet_merge_side_data(AVPacket *pkt);
+
+attribute_deprecated
+int av_packet_split_side_data(AVPacket *pkt);
+#endif
+
+const char *av_packet_side_data_name(enum AVPacketSideDataType type);
+
+/**
+ * Pack a dictionary for use in side_data.
+ *
+ * @param dict The dictionary to pack.
+ * @param size pointer to store the size of the returned data
+ * @return pointer to data if successful, NULL otherwise
+ */
+uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size);
+/**
+ * Unpack a dictionary from side_data.
+ *
+ * @param data data from side_data
+ * @param size size of the data
+ * @param dict the metadata storage dictionary
+ * @return 0 on success, < 0 on failure
+ */
+int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict);
+
+
/**
* Convenience function to free all the side data stored.
* All the other fields stay untouched.
*
* @return 0 on success, a negative AVERROR on error.
*/
-int av_packet_ref(AVPacket *dst, AVPacket *src);
+int av_packet_ref(AVPacket *dst, const AVPacket *src);
/**
* Wipe the packet.
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
int linesize_align[AV_NUM_DATA_POINTERS]);
+/**
+ * Converts AVChromaLocation to swscale x/y chroma position.
+ *
+ * The positions represent the chroma (0,0) position in a coordinates system
+ * with luma (0,0) representing the origin and luma(1,1) representing 256,256
+ *
+ * @param xpos horizontal chroma sample position
+ * @param ypos vertical chroma sample position
+ */
+int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos);
+
+/**
+ * Converts swscale x/y chroma position to AVChromaLocation.
+ *
+ * The positions represent the chroma (0,0) position in a coordinates system
+ * with luma (0,0) representing the origin and luma(1,1) representing 256,256
+ *
+ * @param xpos horizontal chroma sample position
+ * @param ypos vertical chroma sample position
+ */
+enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos);
+
/**
* Decode the audio frame of size avpkt->size from avpkt->data into frame.
*
*/
attribute_deprecated
int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
- int *got_frame_ptr, AVPacket *avpkt);
+ int *got_frame_ptr, const AVPacket *avpkt);
/**
* Decode the video frame of size avpkt->size from avpkt->data into picture.
attribute_deprecated
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
int *got_picture_ptr,
- AVPacket *avpkt);
+ const AVPacket *avpkt);
/**
* Decode a subtitle message.
* and reusing a get_buffer written for video codecs would probably perform badly
* due to a potentially very different allocation pattern.
*
+ * Some decoders (those marked with CODEC_CAP_DELAY) have a delay between input
+ * and output. This means that for some packets they will not immediately
+ * produce decoded output and need to be flushed at the end of decoding to get
+ * all the decoded data. Flushing is done by calling this function with packets
+ * with avpkt->data set to NULL and avpkt->size set to 0 until it stops
+ * returning subtitles. It is safe to flush even those decoders that are not
+ * marked with CODEC_CAP_DELAY, then no subtitles will be returned.
+ *
* @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
* before packets may be fed to the decoder.
*
* @param avctx the codec context
- * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
- freed with avsubtitle_free if *got_sub_ptr is set.
+ * @param[out] sub The Preallocated AVSubtitle in which the decoded subtitle will be stored,
+ * must be freed with avsubtitle_free if *got_sub_ptr is set.
* @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
* @param[in] avpkt The input AVPacket containing the input buffer.
*/
* a flush packet.
*
* @return 0 on success, otherwise negative error code:
- * AVERROR(EAGAIN): input is not accepted right now - the packet must be
- * resent after trying to read output
+ * AVERROR(EAGAIN): input is not accepted in the current state - user
+ * must read output with avcodec_receive_frame() (once
+ * all output is read, the packet should be resent, and
+ * the call will not fail with EAGAIN).
* AVERROR_EOF: the decoder has been flushed, and no new packets can
* be sent to it (also returned if more than 1 flush
* packet is sent)
*
* @return
* 0: success, a frame was returned
- * AVERROR(EAGAIN): output is not available right now - user must try
+ * AVERROR(EAGAIN): output is not available in this state - user must try
* to send new input
* AVERROR_EOF: the decoder has been fully flushed, and there will be
* no more output frames
* avctx->frame_size for all frames except the last.
* The final frame may be smaller than avctx->frame_size.
* @return 0 on success, otherwise negative error code:
- * AVERROR(EAGAIN): input is not accepted right now - the frame must be
- * resent after trying to read output packets
+ * AVERROR(EAGAIN): input is not accepted in the current state - user
+ * must read output with avcodec_receive_packet() (once
+ * all output is read, the packet should be resent, and
+ * the call will not fail with EAGAIN).
* AVERROR_EOF: the encoder has been flushed, and no new frames can
* be sent to it
* AVERROR(EINVAL): codec not opened, refcounted_frames not set, it is a
* encoder. Note that the function will always call
* av_frame_unref(frame) before doing anything else.
* @return 0 on success, otherwise negative error code:
- * AVERROR(EAGAIN): output is not available right now - user must try
- * to send input
+ * AVERROR(EAGAIN): output is not available in the current state - user
+ * must try to send input
* AVERROR_EOF: the encoder has been fully flushed, and there will be
* no more output packets
* AVERROR(EINVAL): codec not opened, or it is an encoder
#define PARSER_FLAG_ONCE 0x0002
/// Set if the parser has a valid file offset
#define PARSER_FLAG_FETCHED_OFFSET 0x0004
+#define PARSER_FLAG_USE_CODEC_TS 0x1000
int64_t offset; ///< byte offset from starting packet start
int64_t cur_frame_end[AV_PARSER_PTS_NB];
* @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
* @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
* @param buf input buffer.
- * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
+ * @param buf_size buffer size in bytes without the padding. I.e. the full buffer
+ size is assumed to be buf_size + AV_INPUT_BUFFER_PADDING_SIZE.
+ To signal EOF, this should be 0 (so that the last frame
+ can be output).
* @param pts input presentation timestamp.
* @param dts input decoding timestamp.
* @param pos input byte position in stream.
/**
* @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed
- * @deprecated use AVBitstreamFilter
+ * @deprecated use AVBitStreamFilter
*/
int av_parser_change(AVCodecParserContext *s,
AVCodecContext *avctx,
* The user can supply an output buffer by setting
* avpkt->data and avpkt->size prior to calling the
* function, but if the size of the user-provided data is not
- * large enough, encoding will fail. All other AVPacket fields
- * will be reset by the encoder using av_init_packet(). If
- * avpkt->data is NULL, the encoder will allocate it.
- * The encoder will set avpkt->size to the size of the
- * output packet.
+ * large enough, encoding will fail. If avpkt->data and
+ * avpkt->size are set, avpkt->destruct must also be set. All
+ * other AVPacket fields will be reset by the encoder using
+ * av_init_packet(). If avpkt->data is NULL, the encoder will
+ * allocate it. The encoder will set avpkt->size to the size
+ * of the output packet.
*
* If this function fails or produces no output, avpkt will be
* freed using av_packet_unref().
* @}
*/
+#if FF_API_AVCODEC_RESAMPLE
+/**
+ * @defgroup lavc_resample Audio resampling
+ * @ingroup libavc
+ * @deprecated use libswresample instead
+ *
+ * @{
+ */
+struct ReSampleContext;
+struct AVResampleContext;
+
+typedef struct ReSampleContext ReSampleContext;
+
+/**
+ * Initialize audio resampling context.
+ *
+ * @param output_channels number of output channels
+ * @param input_channels number of input channels
+ * @param output_rate output sample rate
+ * @param input_rate input sample rate
+ * @param sample_fmt_out requested output sample format
+ * @param sample_fmt_in input sample format
+ * @param filter_length length of each FIR filter in the filterbank relative to the cutoff frequency
+ * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
+ * @param linear if 1 then the used FIR filter will be linearly interpolated
+ between the 2 closest, if 0 the closest will be used
+ * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
+ * @return allocated ReSampleContext, NULL if error occurred
+ */
+attribute_deprecated
+ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
+ int output_rate, int input_rate,
+ enum AVSampleFormat sample_fmt_out,
+ enum AVSampleFormat sample_fmt_in,
+ int filter_length, int log2_phase_count,
+ int linear, double cutoff);
+
+attribute_deprecated
+int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
+
+/**
+ * Free resample context.
+ *
+ * @param s a non-NULL pointer to a resample context previously
+ * created with av_audio_resample_init()
+ */
+attribute_deprecated
+void audio_resample_close(ReSampleContext *s);
+
+
+/**
+ * Initialize an audio resampler.
+ * Note, if either rate is not an integer then simply scale both rates up so they are.
+ * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
+ * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
+ * @param linear If 1 then the used FIR filter will be linearly interpolated
+ between the 2 closest, if 0 the closest will be used
+ * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
+ */
+attribute_deprecated
+struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
+
+/**
+ * Resample an array of samples using a previously configured context.
+ * @param src an array of unconsumed samples
+ * @param consumed the number of samples of src which have been consumed are returned here
+ * @param src_size the number of unconsumed samples available
+ * @param dst_size the amount of space in samples available in dst
+ * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
+ * @return the number of samples written in dst or -1 if an error occurred
+ */
+attribute_deprecated
+int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
+
+
+/**
+ * Compensate samplerate/timestamp drift. The compensation is done by changing
+ * the resampler parameters, so no audible clicks or similar distortions occur
+ * @param compensation_distance distance in output samples over which the compensation should be performed
+ * @param sample_delta number of output samples which should be output less
+ *
+ * example: av_resample_compensate(c, 10, 500)
+ * here instead of 510 samples only 500 samples would be output
+ *
+ * note, due to rounding the actual compensation might be slightly different,
+ * especially if the compensation_distance is large and the in_rate used during init is small
+ */
+attribute_deprecated
+void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
+attribute_deprecated
+void av_resample_close(struct AVResampleContext *c);
+
+/**
+ * @}
+ */
+#endif
+
#if FF_API_AVPICTURE
/**
* @addtogroup lavc_picture
* @deprecated use av_image_fill_arrays() instead.
*/
attribute_deprecated
-int avpicture_fill(AVPicture *picture, uint8_t *ptr,
+int avpicture_fill(AVPicture *picture, const uint8_t *ptr,
enum AVPixelFormat pix_fmt, int width, int height);
/**
* @deprecated use av_image_copy_to_buffer() instead.
*/
attribute_deprecated
-int avpicture_layout(const AVPicture* src, enum AVPixelFormat pix_fmt,
+int avpicture_layout(const AVPicture *src, enum AVPixelFormat pix_fmt,
int width, int height,
unsigned char *dest, int dest_size);
*/
/**
- * @deprecated Use av_pix_fmt_get_chroma_sub_sample
+ * Utility function to access log2_chroma_w log2_chroma_h from
+ * the pixel format AVPixFmtDescriptor.
+ *
+ * This function asserts that pix_fmt is valid. See av_pix_fmt_get_chroma_sub_sample
+ * for one that returns a failure code and continues in case of invalid
+ * pix_fmts.
+ *
+ * @param[in] pix_fmt the pixel format
+ * @param[out] h_shift store log2_chroma_w
+ * @param[out] v_shift store log2_chroma_h
+ *
+ * @see av_pix_fmt_get_chroma_sub_sample
*/
-void attribute_deprecated avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift);
+void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift);
/**
* Return a value representing the fourCC code associated to the
*/
unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt);
-#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
-#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
-#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
-#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
-#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
-#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
-
-/**
- * Compute what kind of losses will occur when converting from one specific
- * pixel format to another.
- * When converting from one pixel format to another, information loss may occur.
- * For example, when converting from RGB24 to GRAY, the color information will
- * be lost. Similarly, other losses occur when converting from some formats to
- * other formats. These losses can involve loss of chroma, but also loss of
- * resolution, loss of color depth, loss due to the color space conversion, loss
- * of the alpha bits or loss due to color quantization.
- * avcodec_get_fix_fmt_loss() informs you about the various types of losses
- * which will occur when converting from one pixel format to another.
- *
- * @param[in] dst_pix_fmt destination pixel format
- * @param[in] src_pix_fmt source pixel format
- * @param[in] has_alpha Whether the source pixel format alpha channel is used.
- * @return Combination of flags informing you what kind of losses will occur.
+/**
+ * @deprecated see av_get_pix_fmt_loss()
*/
int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
int has_alpha);
* format. When converting from one pixel format to another, information loss
* may occur. For example, when converting from RGB24 to GRAY, the color
* information will be lost. Similarly, other losses occur when converting from
- * some formats to other formats. avcodec_find_best_pix_fmt2() searches which of
+ * some formats to other formats. avcodec_find_best_pix_fmt_of_2() searches which of
* the given pixel formats should be used to suffer the least amount of loss.
* The pixel formats from which it chooses one, are determined by the
* pix_fmt_list parameter.
* @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
* @return The best pixel format to convert to or -1 if none was found.
*/
-enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat *pix_fmt_list,
- enum AVPixelFormat src_pix_fmt,
- int has_alpha, int *loss_ptr);
+enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list,
+ enum AVPixelFormat src_pix_fmt,
+ int has_alpha, int *loss_ptr);
+
+/**
+ * @deprecated see av_find_best_pix_fmt_of_2()
+ */
+enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
+ enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
+
+attribute_deprecated
+enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
+ enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
//FIXME func typedef
/**
- * Fill audio frame data and linesize.
+ * Fill AVFrame audio data and linesize pointers.
+ *
+ * The buffer buf must be a preallocated buffer with a size big enough
+ * to contain the specified samples amount. The filled AVFrame data
+ * pointers will point to this buffer.
+ *
* AVFrame extended_data channel pointers are allocated if necessary for
* planar audio.
*
* @param buf buffer to use for frame data
* @param buf_size size of buffer
* @param align plane size sample alignment (0 = default)
- * @return 0 on success, negative error code on failure
+ * @return >=0 on success, negative error code on failure
+ * @todo return the size in bytes required to store the samples in
+ * case of success, at the next libavutil bump
*/
int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
enum AVSampleFormat sample_fmt, const uint8_t *buf,
*/
int av_get_bits_per_sample(enum AVCodecID codec_id);
+/**
+ * Return the PCM codec associated with a sample format.
+ * @param be endianness, 0 for little, 1 for big,
+ * -1 (or anything else) for native
+ * @return AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE
+ */
+enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be);
+
/**
* Return codec bits per sample.
* Only return non-zero if the bits per sample is exactly correct, not an
#if FF_API_OLD_BSF
typedef struct AVBitStreamFilterContext {
void *priv_data;
- struct AVBitStreamFilter *filter;
+ const struct AVBitStreamFilter *filter;
AVCodecParserContext *parser;
struct AVBitStreamFilterContext *next;
+ /**
+ * Internal default arguments, used if NULL is passed to av_bitstream_filter_filter().
+ * Not for access by library users.
+ */
+ char *args;
} AVBitStreamFilterContext;
#endif
#if FF_API_OLD_BSF
/**
- * @deprecated the old bitstream filtering API (using AVBitStreamFilterContext)
- * is deprecated. Use the new bitstream filtering API (using AVBSFContext).
+ * Register a bitstream filter.
+ *
+ * The filter will be accessible to the application code through
+ * av_bitstream_filter_next() or can be directly initialized with
+ * av_bitstream_filter_init().
+ *
+ * @see avcodec_register_all()
*/
attribute_deprecated
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
+
+/**
+ * Create and initialize a bitstream filter context given a bitstream
+ * filter name.
+ *
+ * The returned context must be freed with av_bitstream_filter_close().
+ *
+ * @param name the name of the bitstream filter
+ * @return a bitstream filter context if a matching filter was found
+ * and successfully initialized, NULL otherwise
+ */
attribute_deprecated
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
+
+/**
+ * Filter bitstream.
+ *
+ * This function filters the buffer buf with size buf_size, and places the
+ * filtered buffer in the buffer pointed to by poutbuf.
+ *
+ * The output buffer must be freed by the caller.
+ *
+ * @param bsfc bitstream filter context created by av_bitstream_filter_init()
+ * @param avctx AVCodecContext accessed by the filter, may be NULL.
+ * If specified, this must point to the encoder context of the
+ * output stream the packet is sent to.
+ * @param args arguments which specify the filter configuration, may be NULL
+ * @param poutbuf pointer which is updated to point to the filtered buffer
+ * @param poutbuf_size pointer which is updated to the filtered buffer size in bytes
+ * @param buf buffer containing the data to filter
+ * @param buf_size size in bytes of buf
+ * @param keyframe set to non-zero if the buffer to filter corresponds to a key-frame packet data
+ * @return >= 0 in case of success, or a negative error code in case of failure
+ *
+ * If the return value is positive, an output buffer is allocated and
+ * is available in *poutbuf, and is distinct from the input buffer.
+ *
+ * If the return value is 0, the output buffer is not allocated and
+ * should be considered identical to the input buffer, or in case
+ * *poutbuf was set it points to the input buffer (not necessarily to
+ * its starting address). A special case is if *poutbuf was set to NULL and
+ * *poutbuf_size was set to 0, which indicates the packet should be dropped.
+ */
attribute_deprecated
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
AVCodecContext *avctx, const char *args,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size, int keyframe);
+
+/**
+ * Release bitstream filter context.
+ *
+ * @param bsf the bitstream filter context created with
+ * av_bitstream_filter_init(), can be NULL
+ */
attribute_deprecated
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
+
+/**
+ * If f is NULL, return the first registered bitstream filter,
+ * if f is non-NULL, return the next registered bitstream filter
+ * after f, or NULL if f is the last one.
+ *
+ * This function can be used to iterate over all registered bitstream
+ * filters.
+ */
attribute_deprecated
AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f);
#endif
* av_bsf_receive_packet() repeatedly until it returns AVERROR(EAGAIN) or
* AVERROR_EOF.
*
- * @param pkt the packet to filter. The bitstream filter will take ownership of
+ * @param pkt the packet to filter. pkt must contain some payload (i.e data or
+ * side data must be present in pkt). The bitstream filter will take ownership of
* the packet and reset the contents of pkt. pkt is not touched if an error occurs.
* This parameter may be NULL, which signals the end of the stream (i.e. no more
* packets will be sent). That will cause the filter to output any packets it
*/
const AVClass *av_bsf_get_class(void);
-/* memory */
+/**
+ * Structure for chain/list of bitstream filters.
+ * Empty list can be allocated by av_bsf_list_alloc().
+ */
+typedef struct AVBSFList AVBSFList;
+
+/**
+ * Allocate empty list of bitstream filters.
+ * The list must be later freed by av_bsf_list_free()
+ * or finalized by av_bsf_list_finalize().
+ *
+ * @return Pointer to @ref AVBSFList on success, NULL in case of failure
+ */
+AVBSFList *av_bsf_list_alloc(void);
+
+/**
+ * Free list of bitstream filters.
+ *
+ * @param lst Pointer to pointer returned by av_bsf_list_alloc()
+ */
+void av_bsf_list_free(AVBSFList **lst);
+
+/**
+ * Append bitstream filter to the list of bitstream filters.
+ *
+ * @param lst List to append to
+ * @param bsf Filter context to be appended
+ *
+ * @return >=0 on success, negative AVERROR in case of failure
+ */
+int av_bsf_list_append(AVBSFList *lst, AVBSFContext *bsf);
+
+/**
+ * Construct new bitstream filter context given it's name and options
+ * and append it to the list of bitstream filters.
+ *
+ * @param lst List to append to
+ * @param bsf_name Name of the bitstream filter
+ * @param options Options for the bitstream filter, can be set to NULL
+ *
+ * @return >=0 on success, negative AVERROR in case of failure
+ */
+int av_bsf_list_append2(AVBSFList *lst, const char * bsf_name, AVDictionary **options);
+/**
+ * Finalize list of bitstream filters.
+ *
+ * This function will transform @ref AVBSFList to single @ref AVBSFContext,
+ * so the whole chain of bitstream filters can be treated as single filter
+ * freshly allocated by av_bsf_alloc().
+ * If the call is successful, @ref AVBSFList structure is freed and lst
+ * will be set to NULL. In case of failure, caller is responsible for
+ * freeing the structure by av_bsf_list_free()
+ *
+ * @param lst Filter list structure to be transformed
+ * @param[out] bsf Pointer to be set to newly created @ref AVBSFContext structure
+ * representing the chain of bitstream filters
+ *
+ * @return >=0 on success, negative AVERROR in case of failure
+ */
+int av_bsf_list_finalize(AVBSFList **lst, AVBSFContext **bsf);
/**
- * Allocate a buffer with padding, reusing the given one if large enough.
+ * Parse string describing list of bitstream filters and create single
+ * @ref AVBSFContext describing the whole chain of bitstream filters.
+ * Resulting @ref AVBSFContext can be treated as any other @ref AVBSFContext freshly
+ * allocated by av_bsf_alloc().
+ *
+ * @param str String describing chain of bitstream filters in format
+ * `bsf1[=opt1=val1:opt2=val2][,bsf2]`
+ * @param[out] bsf Pointer to be set to newly created @ref AVBSFContext structure
+ * representing the chain of bitstream filters
+ *
+ * @return >=0 on success, negative AVERROR in case of failure
+ */
+int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf);
+
+/**
+ * Get null/pass-through bitstream filter.
+ *
+ * @param[out] bsf Pointer to be set to new instance of pass-through bitstream filter
*
+ * @return
+ */
+int av_bsf_get_null_filter(AVBSFContext **bsf);
+
+/* memory */
+
+/**
* Same behaviour av_fast_malloc but the buffer has additional
- * AV_INPUT_PADDING_SIZE at the end which will always memset to 0.
+ * AV_INPUT_BUFFER_PADDING_SIZE at the end which will always be 0.
+ *
+ * In addition the whole buffer will initially and after resizes
+ * be 0-initialized so that no uninitialized data will ever appear.
*/
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
+/**
+ * Same behaviour av_fast_padded_malloc except that buffer will always
+ * be 0-initialized after call.
+ */
+void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size);
+
/**
* Encode extradata length to a buffer. Used by xiph codecs.
*
#if FF_API_MISSING_SAMPLE
/**
* Log a generic warning message about a missing feature. This function is
- * intended to be used internally by Libav (libavcodec, libavformat, etc.)
+ * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
* only, and would normally not be used by applications.
* @param[in] avc a pointer to an arbitrary struct of which the first field is
* a pointer to an AVClass struct
/**
* Log a generic warning message asking for a sample. This function is
- * intended to be used internally by Libav (libavcodec, libavformat, etc.)
+ * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
* only, and would normally not be used by applications.
* @param[in] avc a pointer to an arbitrary struct of which the first field is
* a pointer to an AVClass struct
*/
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id);
+/**
+ * Get the name of a codec.
+ * @return a static string identifying the codec; never NULL
+ */
+const char *avcodec_get_name(enum AVCodecID id);
+
/**
* @return a positive value if s is open (i.e. avcodec_open2() was called on it
* with no corresponding avcodec_close()), 0 otherwise.
projects / ffmpeg / blobdiff