avcodec.h
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上传日期:2022-06-04
资源大小:8887k
文件大小:96k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- * copyright (c) 2001 Fabrice Bellard
- *
- * This file is part of FFmpeg.
- *
- * 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.
- *
- * 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
- #ifndef FFMPEG_AVCODEC_H
- #define FFMPEG_AVCODEC_H
- /**
- * @file avcodec.h
- * external API header
- */
- #include "avutil.h"
- #define LIBAVCODEC_VERSION_MAJOR 51
- #define LIBAVCODEC_VERSION_MINOR 57
- #define LIBAVCODEC_VERSION_MICRO 2
- #define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR,
- LIBAVCODEC_VERSION_MINOR,
- LIBAVCODEC_VERSION_MICRO)
- #define LIBAVCODEC_VERSION AV_VERSION(LIBAVCODEC_VERSION_MAJOR,
- LIBAVCODEC_VERSION_MINOR,
- LIBAVCODEC_VERSION_MICRO)
- #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
- #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
- #define AV_NOPTS_VALUE (0x8000000000000000)
- #define AV_TIME_BASE 1000000
- #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
- /**
- * Identifies the syntax and semantics of the bitstream.
- * The principle is roughly:
- * Two decoders with the same ID can decode the same streams.
- * Two encoders with the same ID can encode compatible streams.
- * There may be slight deviations from the principle due to implementation
- * 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.
- */
- enum CodecID {
- CODEC_ID_NONE,
- /* video codecs */
- CODEC_ID_MPEG1VIDEO,
- CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
- CODEC_ID_MPEG2VIDEO_XVMC,
- CODEC_ID_H261,
- CODEC_ID_H263,
- CODEC_ID_RV10,
- CODEC_ID_RV20,
- CODEC_ID_MJPEG,
- CODEC_ID_MJPEGB,
- CODEC_ID_LJPEG,
- CODEC_ID_SP5X,
- CODEC_ID_JPEGLS,
- CODEC_ID_MPEG4,
- CODEC_ID_RAWVIDEO,
- CODEC_ID_MSMPEG4V1,
- CODEC_ID_MSMPEG4V2,
- CODEC_ID_MSMPEG4V3,
- CODEC_ID_WMV1,
- CODEC_ID_WMV2,
- CODEC_ID_H263P,
- CODEC_ID_H263I,
- CODEC_ID_FLV1,
- CODEC_ID_SVQ1,
- CODEC_ID_SVQ3,
- CODEC_ID_DVVIDEO,
- CODEC_ID_HUFFYUV,
- CODEC_ID_CYUV,
- CODEC_ID_H264,
- CODEC_ID_INDEO3,
- CODEC_ID_VP3,
- CODEC_ID_THEORA,
- CODEC_ID_ASV1,
- CODEC_ID_ASV2,
- CODEC_ID_FFV1,
- CODEC_ID_4XM,
- CODEC_ID_VCR1,
- CODEC_ID_CLJR,
- CODEC_ID_MDEC,
- CODEC_ID_ROQ,
- CODEC_ID_INTERPLAY_VIDEO,
- CODEC_ID_XAN_WC3,
- CODEC_ID_XAN_WC4,
- CODEC_ID_RPZA,
- CODEC_ID_CINEPAK,
- CODEC_ID_WS_VQA,
- CODEC_ID_MSRLE,
- CODEC_ID_MSVIDEO1,
- CODEC_ID_IDCIN,
- CODEC_ID_8BPS,
- CODEC_ID_SMC,
- CODEC_ID_FLIC,
- CODEC_ID_TRUEMOTION1,
- CODEC_ID_VMDVIDEO,
- CODEC_ID_MSZH,
- CODEC_ID_ZLIB,
- CODEC_ID_QTRLE,
- CODEC_ID_SNOW,
- CODEC_ID_TSCC,
- CODEC_ID_ULTI,
- CODEC_ID_QDRAW,
- CODEC_ID_VIXL,
- CODEC_ID_QPEG,
- CODEC_ID_XVID,
- CODEC_ID_PNG,
- CODEC_ID_PPM,
- CODEC_ID_PBM,
- CODEC_ID_PGM,
- CODEC_ID_PGMYUV,
- CODEC_ID_PAM,
- CODEC_ID_FFVHUFF,
- CODEC_ID_RV30,
- CODEC_ID_RV40,
- CODEC_ID_VC1,
- CODEC_ID_WMV3,
- CODEC_ID_LOCO,
- CODEC_ID_WNV1,
- CODEC_ID_AASC,
- CODEC_ID_INDEO2,
- CODEC_ID_FRAPS,
- CODEC_ID_TRUEMOTION2,
- CODEC_ID_BMP,
- CODEC_ID_CSCD,
- CODEC_ID_MMVIDEO,
- CODEC_ID_ZMBV,
- CODEC_ID_AVS,
- CODEC_ID_SMACKVIDEO,
- CODEC_ID_NUV,
- CODEC_ID_KMVC,
- CODEC_ID_FLASHSV,
- CODEC_ID_CAVS,
- CODEC_ID_JPEG2000,
- CODEC_ID_VMNC,
- CODEC_ID_VP5,
- CODEC_ID_VP6,
- CODEC_ID_VP6F,
- CODEC_ID_TARGA,
- CODEC_ID_DSICINVIDEO,
- CODEC_ID_TIERTEXSEQVIDEO,
- CODEC_ID_TIFF,
- CODEC_ID_GIF,
- CODEC_ID_FFH264,
- CODEC_ID_DXA,
- CODEC_ID_DNXHD,
- CODEC_ID_THP,
- CODEC_ID_SGI,
- CODEC_ID_C93,
- CODEC_ID_BETHSOFTVID,
- CODEC_ID_PTX,
- CODEC_ID_TXD,
- CODEC_ID_VP6A,
- CODEC_ID_AMV,
- CODEC_ID_VB,
- CODEC_ID_PCX,
- CODEC_ID_SUNRAST,
- CODEC_ID_INDEO4,
- CODEC_ID_INDEO5,
- CODEC_ID_MIMIC,
- CODEC_ID_RL2,
- CODEC_ID_8SVX_EXP,
- CODEC_ID_8SVX_FIB,
- CODEC_ID_ESCAPE124,
- CODEC_ID_DIRAC,
- CODEC_ID_BFI,
- /* various PCM "codecs" */
- CODEC_ID_PCM_S16LE= 0x10000,
- CODEC_ID_PCM_S16BE,
- CODEC_ID_PCM_U16LE,
- CODEC_ID_PCM_U16BE,
- CODEC_ID_PCM_S8,
- CODEC_ID_PCM_U8,
- CODEC_ID_PCM_MULAW,
- CODEC_ID_PCM_ALAW,
- CODEC_ID_PCM_S32LE,
- CODEC_ID_PCM_S32BE,
- CODEC_ID_PCM_U32LE,
- CODEC_ID_PCM_U32BE,
- CODEC_ID_PCM_S24LE,
- CODEC_ID_PCM_S24BE,
- CODEC_ID_PCM_U24LE,
- CODEC_ID_PCM_U24BE,
- CODEC_ID_PCM_S24DAUD,
- CODEC_ID_PCM_ZORK,
- CODEC_ID_PCM_S16LE_PLANAR,
- CODEC_ID_PCM_DVD,
- /* various ADPCM codecs */
- CODEC_ID_ADPCM_IMA_QT= 0x11000,
- CODEC_ID_ADPCM_IMA_WAV,
- CODEC_ID_ADPCM_IMA_DK3,
- CODEC_ID_ADPCM_IMA_DK4,
- CODEC_ID_ADPCM_IMA_WS,
- CODEC_ID_ADPCM_IMA_SMJPEG,
- CODEC_ID_ADPCM_MS,
- CODEC_ID_ADPCM_4XM,
- CODEC_ID_ADPCM_XA,
- CODEC_ID_ADPCM_ADX,
- CODEC_ID_ADPCM_EA,
- CODEC_ID_ADPCM_G726,
- CODEC_ID_ADPCM_CT,
- CODEC_ID_ADPCM_SWF,
- CODEC_ID_ADPCM_YAMAHA,
- CODEC_ID_ADPCM_SBPRO_4,
- CODEC_ID_ADPCM_SBPRO_3,
- CODEC_ID_ADPCM_SBPRO_2,
- CODEC_ID_ADPCM_THP,
- CODEC_ID_ADPCM_IMA_AMV,
- CODEC_ID_ADPCM_EA_R1,
- CODEC_ID_ADPCM_EA_R3,
- CODEC_ID_ADPCM_EA_R2,
- CODEC_ID_ADPCM_IMA_EA_SEAD,
- CODEC_ID_ADPCM_IMA_EA_EACS,
- CODEC_ID_ADPCM_EA_XAS,
- CODEC_ID_ADPCM_EA_MAXIS_XA,
- /* AMR */
- CODEC_ID_AMR_NB= 0x12000,
- CODEC_ID_AMR_WB,
- /* RealAudio codecs*/
- CODEC_ID_RA_144= 0x13000,
- CODEC_ID_RA_288,
- /* various DPCM codecs */
- CODEC_ID_ROQ_DPCM= 0x14000,
- CODEC_ID_INTERPLAY_DPCM,
- CODEC_ID_XAN_DPCM,
- CODEC_ID_SOL_DPCM,
- /* audio codecs */
- CODEC_ID_MP2= 0x15000,
- CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
- CODEC_ID_AAC,
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- CODEC_ID_MPEG4AAC,
- #endif
- CODEC_ID_AC3,
- CODEC_ID_DTS,
- CODEC_ID_VORBIS,
- CODEC_ID_DVAUDIO,
- CODEC_ID_WMAV1,
- CODEC_ID_WMAV2,
- CODEC_ID_MACE3,
- CODEC_ID_MACE6,
- CODEC_ID_VMDAUDIO,
- CODEC_ID_SONIC,
- CODEC_ID_SONIC_LS,
- CODEC_ID_FLAC,
- CODEC_ID_MP3ADU,
- CODEC_ID_MP3ON4,
- CODEC_ID_SHORTEN,
- CODEC_ID_ALAC,
- CODEC_ID_WESTWOOD_SND1,
- CODEC_ID_GSM, ///< as in Berlin toast format
- CODEC_ID_QDM2,
- CODEC_ID_COOK,
- CODEC_ID_TRUESPEECH,
- CODEC_ID_TTA,
- CODEC_ID_SMACKAUDIO,
- CODEC_ID_QCELP,
- CODEC_ID_WAVPACK,
- CODEC_ID_DSICINAUDIO,
- CODEC_ID_IMC,
- CODEC_ID_MUSEPACK7,
- CODEC_ID_MLP,
- CODEC_ID_GSM_MS, /* as found in WAV */
- CODEC_ID_ATRAC3,
- CODEC_ID_VOXWARE,
- CODEC_ID_APE,
- CODEC_ID_NELLYMOSER,
- CODEC_ID_MUSEPACK8,
- CODEC_ID_SPEEX,
- CODEC_ID_WMAVOICE,
- CODEC_ID_WMAPRO,
- CODEC_ID_WMALOSSLESS,
- CODEC_ID_ATRAC3P,
- /* subtitle codecs */
- CODEC_ID_DVD_SUBTITLE= 0x17000,
- CODEC_ID_DVB_SUBTITLE,
- CODEC_ID_TEXT, ///< raw UTF-8 text
- CODEC_ID_XSUB,
- CODEC_ID_SSA,
- CODEC_ID_MOV_TEXT,
- /* other specific kind of codecs (generally used for attachments) */
- CODEC_ID_TTF= 0x18000,
- CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
- * stream (only used by libavformat) */
- };
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- /* CODEC_ID_MP3LAME is obsolete */
- #define CODEC_ID_MP3LAME CODEC_ID_MP3
- #define CODEC_ID_MPEG4AAC CODEC_ID_AAC
- #endif
- enum CodecType {
- CODEC_TYPE_UNKNOWN = -1,
- CODEC_TYPE_VIDEO,
- CODEC_TYPE_AUDIO,
- CODEC_TYPE_DATA,
- CODEC_TYPE_SUBTITLE,
- CODEC_TYPE_ATTACHMENT,
- CODEC_TYPE_NB
- };
- /**
- * Currently unused, may be used if 24/32 bits samples are ever supported.
- * all in native-endian format
- */
- enum SampleFormat {
- SAMPLE_FMT_NONE = -1,
- SAMPLE_FMT_U8, ///< unsigned 8 bits
- SAMPLE_FMT_S16, ///< signed 16 bits
- SAMPLE_FMT_S24, ///< signed 24 bits
- SAMPLE_FMT_S32, ///< signed 32 bits
- SAMPLE_FMT_FLT, ///< float
- };
- /* in bytes */
- #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
- /**
- * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
- * This is mainly needed because some optimized bitstream readers read
- * 32 or 64 bit at once and could read over the end.<br>
- * Note: If the first 23 bits of the additional bytes are not 0, then damaged
- * MPEG bitstreams could cause overread and segfault.
- */
- #define FF_INPUT_BUFFER_PADDING_SIZE 8
- /**
- * minimum encoding buffer size
- * Used to avoid some checks during header writing.
- */
- #define FF_MIN_BUFFER_SIZE 16384
- /**
- * motion estimation type.
- */
- enum Motion_Est_ID {
- ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
- ME_FULL,
- ME_LOG,
- ME_PHODS,
- ME_EPZS, ///< enhanced predictive zonal search
- ME_X1, ///< reserved for experiments
- ME_HEX, ///< hexagon based search
- ME_UMH, ///< uneven multi-hexagon search
- ME_ITER, ///< iterative search
- ME_TESA, ///< transformed exhaustive search algorithm
- };
- enum AVDiscard{
- /* We leave some space between them for extensions (drop some
- * keyframes for intra-only or drop just some bidir frames). */
- AVDISCARD_NONE =-16, ///< discard nothing
- 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_NONKEY = 32, ///< discard all frames except keyframes
- AVDISCARD_ALL = 48, ///< discard all
- };
- typedef struct RcOverride{
- int start_frame;
- int end_frame;
- int qscale; // If this is 0 then quality_factor will be used instead.
- float quality_factor;
- } RcOverride;
- #define FF_MAX_B_FRAMES 16
- /* encoding support
- These flags can be passed in AVCodecContext.flags before initialization.
- Note: Not everything is supported yet.
- */
- #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_QPEL 0x0010 ///< Use qpel MC.
- #define CODEC_FLAG_GMC 0x0020 ///< Use GMC.
- #define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>.
- #define CODEC_FLAG_PART 0x0080 ///< Use data partitioning.
- /**
- * The parent program guarantees that the input for B-frames containing
- * streams is not written to for at least s->max_b_frames+1 frames, if
- * this is not set the input will be copied.
- */
- #define CODEC_FLAG_INPUT_PRESERVED 0x0100
- #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_EXTERN_HUFF 0x1000 ///< Use external Huffman table (for MJPEG).
- #define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale.
- #define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges.
- #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_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization.
- #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
- #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay.
- #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< Use alternate scan.
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< Use trellis quantization.
- #endif
- #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 */
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction (remove this)
- #endif
- #define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
- #define CODEC_FLAG_H263P_UMV 0x02000000 ///< unlimited motion vector
- #define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp.
- #define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon.
- #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H.263 alternative inter VLC
- #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
- #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
- #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
- #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
- #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
- #define CODEC_FLAG_CLOSED_GOP 0x80000000
- #define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks.
- #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size.
- #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_BPYRAMID 0x00000010 ///< H.264 allow B-frames to be used as references.
- #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for B-frames
- #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
- #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
- #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
- #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
- #define CODEC_FLAG2_BRDO 0x00000400 ///< B-frame rate-distortion optimization
- #define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< Use MPEG-2 intra VLC table.
- #define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
- #define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
- #define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping
- #define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
- #define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
- #define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
- /* Unsupported options :
- * Syntax Arithmetic coding (SAC)
- * Reference Picture Selection
- * Independent Segment Decoding */
- /* /Fx */
- /* codec capabilities */
- #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
- /**
- * Codec uses get_buffer() for allocating buffers.
- * direct rendering method 1
- */
- #define CODEC_CAP_DR1 0x0002
- /* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
- #define CODEC_CAP_PARSE_ONLY 0x0004
- #define CODEC_CAP_TRUNCATED 0x0008
- /* Codec can export data for HW decoding (XvMC). */
- #define CODEC_CAP_HWACCEL 0x0010
- /**
- * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
- * If this is not set, the codec is guaranteed to never be fed with NULL data.
- */
- #define CODEC_CAP_DELAY 0x0020
- /**
- * 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
- //The following defines may change, don't expect compatibility if you use them.
- #define MB_TYPE_INTRA4x4 0x0001
- #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
- #define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific
- #define MB_TYPE_16x16 0x0008
- #define MB_TYPE_16x8 0x0010
- #define MB_TYPE_8x16 0x0020
- #define MB_TYPE_8x8 0x0040
- #define MB_TYPE_INTERLACED 0x0080
- #define MB_TYPE_DIRECT2 0x0100 //FIXME
- #define MB_TYPE_ACPRED 0x0200
- #define MB_TYPE_GMC 0x0400
- #define MB_TYPE_SKIP 0x0800
- #define MB_TYPE_P0L0 0x1000
- #define MB_TYPE_P1L0 0x2000
- #define MB_TYPE_P0L1 0x4000
- #define MB_TYPE_P1L1 0x8000
- #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
- #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
- #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, ...)
- /**
- * Pan Scan area.
- * This specifies the area which should be displayed.
- * Note there may be multiple such areas for one frame.
- */
- typedef struct AVPanScan{
- /**
- * id
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- int id;
- /**
- * width and height in 1/16 pel
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- int width;
- int height;
- /**
- * position of the top left corner in 1/16 pel for up to 3 fields/frames
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- int16_t position[3][2];
- }AVPanScan;
- #define FF_COMMON_FRAME
- /**
- * pointer to the picture planes.
- * This might be different from the first allocated byte
- * - encoding:
- * - decoding:
- */
- uint8_t *data[4];
- int linesize[4];
- /**
- * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.
- * This isn't used by libavcodec unless the default get/release_buffer() is used.
- * - encoding:
- * - decoding:
- */
- uint8_t *base[4];
- /**
- * 1 -> keyframe, 0-> not
- * - encoding: Set by libavcodec.
- * - decoding: Set by libavcodec.
- */
- int key_frame;
- /**
- * Picture type of the frame, see ?_TYPE below.
- * - encoding: Set by libavcodec. for coded_picture (and set by user for input).
- * - decoding: Set by libavcodec.
- */
- int pict_type;
- /**
- * presentation timestamp in time_base units (time when frame should be shown to user)
- * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.
- * - encoding: MUST be set by user.
- * - decoding: Set by libavcodec.
- */
- int64_t pts;
- /**
- * picture number in bitstream order
- * - encoding: set by
- * - decoding: Set by libavcodec.
- */
- int coded_picture_number;
- /**
- * picture number in display order
- * - encoding: set by
- * - decoding: Set by libavcodec.
- */
- int display_picture_number;
- /**
- * quality (between 1 (good) and FF_LAMBDA_MAX (bad))
- * - encoding: Set by libavcodec. for coded_picture (and set by user for input).
- * - decoding: Set by libavcodec.
- */
- int quality;
- /**
- * buffer age (1->was last buffer and dint change, 2->..., ...).
- * Set to INT_MAX if the buffer has not been used yet.
- * - encoding: unused
- * - decoding: MUST be set by get_buffer().
- */
- int age;
- /**
- * is this picture used as reference
- * The values for this are the same as the MpegEncContext.picture_structure
- * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.
- * - encoding: unused
- * - decoding: Set by libavcodec. (before get_buffer() call)).
- */
- int reference;
- /**
- * QP table
- * - encoding: unused
- * - decoding: Set by libavcodec.
- */
- int8_t *qscale_table;
- /**
- * QP store stride
- * - encoding: unused
- * - decoding: Set by libavcodec.
- */
- int qstride;
- /**
- * mbskip_table[mb]>=1 if MB didn't change
- * stride= mb_width = (width+15)>>4
- * - encoding: unused
- * - decoding: Set by libavcodec.
- */
- uint8_t *mbskip_table;
- /**
- * motion vector table
- * @code
- * example:
- * int mv_sample_log2= 4 - motion_subsample_log2;
- * int mb_width= (width+15)>>4;
- * int mv_stride= (mb_width << mv_sample_log2) + 1;
- * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];
- * @endcode
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- int16_t (*motion_val[2])[2];
- /**
- * macroblock type table
- * mb_type_base + mb_width + 2
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- uint32_t *mb_type;
- /**
- * log2 of the size of the block which a single vector in motion_val represents:
- * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)
- * - encoding: unused
- * - decoding: Set by libavcodec.
- */
- uint8_t motion_subsample_log2;
- /**
- * for some private data of the user
- * - encoding: unused
- * - decoding: Set by user.
- */
- void *opaque;
- /**
- * error
- * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.
- * - decoding: unused
- */
- uint64_t error[4];
- /**
- * type of the buffer (to keep track of who has to deallocate data[*])
- * - encoding: Set by the one who allocates it.
- * - decoding: Set by the one who allocates it.
- * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.
- */
- int type;
- /**
- * When decoding, this signals how much the picture must be delayed.
- * extra_delay = repeat_pict / (2*fps)
- * - encoding: unused
- * - decoding: Set by libavcodec.
- */
- int repeat_pict;
- /**
- *
- */
- int qscale_type;
- /**
- * The content of the picture is interlaced.
- * - encoding: Set by user.
- * - decoding: Set by libavcodec. (default 0)
- */
- int interlaced_frame;
- /**
- * If the content is interlaced, is top field displayed first.
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- int top_field_first;
- /**
- * Pan scan.
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- AVPanScan *pan_scan;
- /**
- * Tell user application that palette has changed from previous frame.
- * - encoding: ??? (no palette-enabled encoder yet)
- * - decoding: Set by libavcodec. (default 0).
- */
- int palette_has_changed;
- /**
- * codec suggestion on buffer type if != 0
- * - encoding: unused
- * - decoding: Set by libavcodec. (before get_buffer() call)).
- */
- int buffer_hints;
- /**
- * DCT coefficients
- * - encoding: unused
- * - decoding: Set by libavcodec.
- */
- short *dct_coeff;
- /**
- * motion referece frame index
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- int8_t *ref_index[2];
- #define FF_QSCALE_TYPE_MPEG1 0
- #define FF_QSCALE_TYPE_MPEG2 1
- #define FF_QSCALE_TYPE_H264 2
- #define FF_BUFFER_TYPE_INTERNAL 1
- #define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
- #define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
- #define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
- #define FF_I_TYPE 1 ///< Intra
- #define FF_P_TYPE 2 ///< Predicted
- #define FF_B_TYPE 3 ///< Bi-dir predicted
- #define FF_S_TYPE 4 ///< S(GMC)-VOP MPEG4
- #define FF_SI_TYPE 5 ///< Switching Intra
- #define FF_SP_TYPE 6 ///< Switching Predicted
- #define FF_BI_TYPE 7
- #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore).
- #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
- #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
- #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
- /**
- * Audio Video Frame.
- * New fields can be added to the end of FF_COMMON_FRAME with minor version
- * bumps.
- * Removal, reordering and changes to existing fields require a major
- * version bump. No fields should be added into AVFrame before or after
- * FF_COMMON_FRAME!
- * sizeof(AVFrame) must not be used outside libav*.
- */
- typedef struct AVFrame {
- FF_COMMON_FRAME
- } AVFrame;
- #define DEFAULT_FRAME_RATE_BASE 1001000
- /**
- * main external API structure.
- * New fields can be added to the end with minor version bumps.
- * Removal, reordering and changes to existing fields require a major
- * version bump.
- * sizeof(AVCodecContext) must not be used outside libav*.
- */
- typedef struct AVCodecContext {
- /**
- * information on struct for av_log
- * - set by avcodec_alloc_context
- */
- const AVClass *av_class;
- /**
- * 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.
- */
- int bit_rate;
- /**
- * number of bits the bitstream is allowed to diverge from the reference.
- * the reference can be CBR (for CBR pass1) or VBR (for pass2)
- * - encoding: Set by user; unused for constant quantizer encoding.
- * - decoding: unused
- */
- int bit_rate_tolerance;
- /**
- * CODEC_FLAG_*.
- * - encoding: Set by user.
- * - decoding: Set by user.
- */
- int flags;
- /**
- * Some codecs need additional format info. It is stored here.
- * If any muxer uses this then ALL demuxers/parsers AND encoders for the
- * specific codec MUST set it correctly otherwise stream copy breaks.
- * In general use of this field by muxers is not recommanded.
- * - encoding: Set by libavcodec.
- * - decoding: Set by libavcodec. (FIXME: Is this OK?)
- */
- int sub_id;
- /**
- * Motion estimation algorithm used for video coding.
- * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
- * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
- * - encoding: MUST be set by user.
- * - decoding: unused
- */
- int me_method;
- /**
- * some codecs need / can use extradata like Huffman tables.
- * mjpeg: Huffman tables
- * rv10: additional flags
- * mpeg4: global headers (they can be in the bitstream or here)
- * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
- * than extradata_size to avoid prolems 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.
- */
- uint8_t *extradata;
- int extradata_size;
- /**
- * This is the fundamental unit of time (in seconds) in terms
- * of which frame timestamps are represented. For fixed-fps content,
- * timebase should be 1/framerate and timestamp increments should be
- * identically 1.
- * - encoding: MUST be set by user.
- * - decoding: Set by libavcodec.
- */
- AVRational time_base;
- /* video only */
- /**
- * picture width / height.
- * - encoding: MUST be set by user.
- * - decoding: Set by libavcodec.
- * Note: For compatibility it is possible to set this instead of
- * coded_width/height before decoding.
- */
- int width, height;
- #define FF_ASPECT_EXTENDED 15
- /**
- * the number of pictures in a group of pictures, or 0 for intra_only
- * - encoding: Set by user.
- * - decoding: unused
- */
- int gop_size;
- /**
- * Pixel format, see PIX_FMT_xxx.
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- enum PixelFormat pix_fmt;
- /**
- * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
- * has to read frames at native frame rate.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int rate_emu;
- /**
- * If non NULL, 'draw_horiz_band' is called by the libavcodec
- * decoder to draw a horizontal band. It improves cache usage. Not
- * all codecs can do that. You must check the codec capabilities
- * beforehand.
- * - encoding: unused
- * - decoding: Set by user.
- * @param height the height of the slice
- * @param y the y position of the slice
- * @param type 1->top field, 2->bottom field, 3->frame
- * @param offset offset into the AVFrame.data from which the slice should be read
- */
- void (*draw_horiz_band)(struct AVCodecContext *s,
- const AVFrame *src, int offset[4],
- int y, int type, int height);
- /* audio only */
- int sample_rate; ///< samples per second
- int channels; ///< number of audio channels
- /**
- * audio sample format
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- enum SampleFormat sample_fmt; ///< sample format, currently unused
- /* The following data should not be initialized. */
- /**
- * Samples per packet, initialized when calling 'init'.
- */
- int frame_size;
- int frame_number; ///< audio or video frame number
- int real_pict_num; ///< Returns the real picture number of previous encoded frame.
- /**
- * Number of frames the decoded output will be delayed relative to
- * the encoded input.
- * - encoding: Set by libavcodec.
- * - decoding: unused
- */
- int delay;
- /* - encoding parameters */
- float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
- float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
- /**
- * minimum quantizer
- * - encoding: Set by user.
- * - decoding: unused
- */
- int qmin;
- /**
- * maximum quantizer
- * - encoding: Set by user.
- * - decoding: unused
- */
- int qmax;
- /**
- * maximum quantizer difference between frames
- * - encoding: Set by user.
- * - decoding: unused
- */
- int max_qdiff;
- /**
- * maximum number of B-frames between non-B-frames
- * Note: The output will be delayed by max_b_frames+1 relative to the input.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int max_b_frames;
- /**
- * qscale factor between IP and B-frames
- * - encoding: Set by user.
- * - decoding: unused
- */
- float b_quant_factor;
- /** obsolete FIXME remove */
- int rc_strategy;
- #define FF_RC_STRATEGY_XVID 1
- int b_frame_strategy;
- /**
- * hurry up amount
- * - encoding: unused
- * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
- * @deprecated Deprecated in favor of skip_idct and skip_frame.
- */
- int hurry_up;
- struct AVCodec *codec;
- void *priv_data;
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- /* unused, FIXME remove*/
- int rtp_mode;
- #endif
- int rtp_payload_size; /* The size of the RTP payload: the coder will */
- /* do its best to deliver a chunk with size */
- /* below rtp_payload_size, the chunk will start */
- /* with a start code on some codecs like H.263. */
- /* This doesn't take account of any particular */
- /* headers inside the transmitted RTP payload. */
- /* The RTP callback: This function is called */
- /* every time the encoder has a packet to send. */
- /* It depends on the encoder if the data starts */
- /* with a Start Code (it should). H.263 does. */
- /* mb_nb contains the number of macroblocks */
- /* encoded in the RTP payload. */
- void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
- /* statistics, used for 2-pass encoding */
- int mv_bits;
- int header_bits;
- int i_tex_bits;
- int p_tex_bits;
- int i_count;
- int p_count;
- int skip_count;
- int misc_bits;
- /**
- * number of bits used for the previously encoded frame
- * - encoding: Set by libavcodec.
- * - decoding: unused
- */
- int frame_bits;
- /**
- * Private data of the user, can be used to carry app specific stuff.
- * - encoding: Set by user.
- * - decoding: Set by user.
- */
- void *opaque;
- char codec_name[32];
- enum CodecType codec_type; /* see CODEC_TYPE_xxx */
- enum CodecID codec_id; /* see CODEC_ID_xxx */
- /**
- * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
- * This is used to work around some encoder bugs.
- * A demuxer should set this to what is stored in the field used to identify the codec.
- * If there are multiple such fields in a container then the demuxer should choose the one
- * which maximizes the information about the used codec.
- * If the codec tag field in a container is larger then 32 bits then the demuxer should
- * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
- * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
- * first.
- * - encoding: Set by user, if not then the default based on codec_id will be used.
- * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
- */
- unsigned int codec_tag;
- /**
- * Work around bugs in encoders which sometimes cannot be detected automatically.
- * - encoding: Set by user
- * - decoding: Set by user
- */
- int workaround_bugs;
- #define FF_BUG_AUTODETECT 1 ///< autodetection
- #define FF_BUG_OLD_MSMPEG4 2
- #define FF_BUG_XVID_ILACE 4
- #define FF_BUG_UMP4 8
- #define FF_BUG_NO_PADDING 16
- #define FF_BUG_AMV 32
- #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default.
- #define FF_BUG_QPEL_CHROMA 64
- #define FF_BUG_STD_QPEL 128
- #define FF_BUG_QPEL_CHROMA2 256
- #define FF_BUG_DIRECT_BLOCKSIZE 512
- #define FF_BUG_EDGE 1024
- #define FF_BUG_HPEL_CHROMA 2048
- #define FF_BUG_DC_CLIP 4096
- #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
- //#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
- /**
- * luma single coefficient elimination threshold
- * - encoding: Set by user.
- * - decoding: unused
- */
- int luma_elim_threshold;
- /**
- * chroma single coeff elimination threshold
- * - encoding: Set by user.
- * - decoding: unused
- */
- int chroma_elim_threshold;
- /**
- * strictly follow the standard (MPEG4, ...).
- * - encoding: Set by user.
- * - decoding: unused
- */
- int strict_std_compliance;
- #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to a older more strict version of the spec or reference software.
- #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
- #define FF_COMPLIANCE_NORMAL 0
- #define FF_COMPLIANCE_INOFFICIAL -1 ///< Allow inofficial extensions.
- #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
- /**
- * qscale offset between IP and B-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
- */
- float b_quant_offset;
- /**
- * Error resilience; higher values will detect more errors but may
- * misdetect some more or less valid parts as errors.
- * - encoding: unused
- * - decoding: Set by user.
- */
- int error_resilience;
- #define FF_ER_CAREFUL 1
- #define FF_ER_COMPLIANT 2
- #define FF_ER_AGGRESSIVE 3
- #define FF_ER_VERY_AGGRESSIVE 4
- /**
- * Called at the beginning of each frame to get a buffer for it.
- * If pic.reference is set then the frame will be read later by libavcodec.
- * avcodec_align_dimensions() should be used to find the required width and
- * height, as they normally need to be rounded up to the next multiple of 16.
- * - encoding: unused
- * - decoding: Set by libavcodec., user can override.
- */
- int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
- /**
- * Called to release buffers which were allocated with get_buffer.
- * A released buffer can be reused in get_buffer().
- * pic.data[*] must be set to NULL.
- * - encoding: unused
- * - decoding: Set by libavcodec., user can override.
- */
- void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
- /**
- * If 1 the stream has a 1 frame delay during decoding.
- * - encoding: Set by libavcodec.
- * - decoding: Set by libavcodec.
- */
- int has_b_frames;
- /**
- * number of bytes per packet if constant and known or 0
- * Used by some WAV based audio codecs.
- */
- int block_align;
- int parse_only; /* - decoding only: If true, only parsing is done
- (function avcodec_parse_frame()). The frame
- data is returned. Only MPEG codecs support this now. */
- /**
- * 0-> h263 quant 1-> mpeg quant
- * - encoding: Set by user.
- * - decoding: unused
- */
- int mpeg_quant;
- /**
- * pass1 encoding statistics output buffer
- * - encoding: Set by libavcodec.
- * - decoding: unused
- */
- char *stats_out;
- /**
- * pass2 encoding statistics input buffer
- * Concatenated stuff from stats_out of pass1 should be placed here.
- * - encoding: Allocated/set/freed by user.
- * - decoding: unused
- */
- char *stats_in;
- /**
- * ratecontrol qmin qmax limiting method
- * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
- * - encoding: Set by user.
- * - decoding: unused
- */
- float rc_qsquish;
- float rc_qmod_amp;
- int rc_qmod_freq;
- /**
- * ratecontrol override, see RcOverride
- * - encoding: Allocated/set/freed by user.
- * - decoding: unused
- */
- RcOverride *rc_override;
- int rc_override_count;
- /**
- * rate control equation
- * - encoding: Set by user
- * - decoding: unused
- */
- const char *rc_eq;
- /**
- * maximum bitrate
- * - encoding: Set by user.
- * - decoding: unused
- */
- int rc_max_rate;
- /**
- * minimum bitrate
- * - encoding: Set by user.
- * - decoding: unused
- */
- int rc_min_rate;
- /**
- * decoder bitstream buffer size
- * - encoding: Set by user.
- * - decoding: unused
- */
- int rc_buffer_size;
- float rc_buffer_aggressivity;
- /**
- * 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
- */
- float i_quant_factor;
- /**
- * qscale offset between P and I-frames
- * - encoding: Set by user.
- * - decoding: unused
- */
- float i_quant_offset;
- /**
- * initial complexity for pass1 ratecontrol
- * - encoding: Set by user.
- * - decoding: unused
- */
- float rc_initial_cplx;
- /**
- * DCT algorithm, see FF_DCT_* below
- * - encoding: Set by user.
- * - decoding: unused
- */
- int dct_algo;
- #define FF_DCT_AUTO 0
- #define FF_DCT_FASTINT 1
- #define FF_DCT_INT 2
- #define FF_DCT_MMX 3
- #define FF_DCT_MLIB 4
- #define FF_DCT_ALTIVEC 5
- #define FF_DCT_FAAN 6
- /**
- * luminance masking (0-> disabled)
- * - encoding: Set by user.
- * - decoding: unused
- */
- float lumi_masking;
- /**
- * temporary complexity masking (0-> disabled)
- * - encoding: Set by user.
- * - decoding: unused
- */
- float temporal_cplx_masking;
- /**
- * spatial complexity masking (0-> disabled)
- * - encoding: Set by user.
- * - decoding: unused
- */
- float spatial_cplx_masking;
- /**
- * p block masking (0-> disabled)
- * - encoding: Set by user.
- * - decoding: unused
- */
- float p_masking;
- /**
- * darkness masking (0-> disabled)
- * - encoding: Set by user.
- * - decoding: unused
- */
- float dark_masking;
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- /* for binary compatibility */
- int unused;
- #endif
- /**
- * IDCT algorithm, see FF_IDCT_* below.
- * - encoding: Set by user.
- * - decoding: Set by user.
- */
- int idct_algo;
- #define FF_IDCT_AUTO 0
- #define FF_IDCT_INT 1
- #define FF_IDCT_SIMPLE 2
- #define FF_IDCT_SIMPLEMMX 3
- #define FF_IDCT_LIBMPEG2MMX 4
- #define FF_IDCT_PS2 5
- #define FF_IDCT_MLIB 6
- #define FF_IDCT_ARM 7
- #define FF_IDCT_ALTIVEC 8
- #define FF_IDCT_SH4 9
- #define FF_IDCT_SIMPLEARM 10
- #define FF_IDCT_H264 11
- #define FF_IDCT_VP3 12
- #define FF_IDCT_IPP 13
- #define FF_IDCT_XVIDMMX 14
- #define FF_IDCT_CAVS 15
- #define FF_IDCT_SIMPLEARMV5TE 16
- #define FF_IDCT_SIMPLEARMV6 17
- #define FF_IDCT_SIMPLEVIS 18
- #define FF_IDCT_WMV2 19
- #define FF_IDCT_FAAN 20
- /**
- * slice count
- * - encoding: Set by libavcodec.
- * - decoding: Set by user (or 0).
- */
- int slice_count;
- /**
- * slice offsets in the frame in bytes
- * - encoding: Set/allocated by libavcodec.
- * - decoding: Set/allocated by user (or NULL).
- */
- int *slice_offset;
- /**
- * error concealment flags
- * - encoding: unused
- * - decoding: Set by user.
- */
- int error_concealment;
- #define FF_EC_GUESS_MVS 1
- #define FF_EC_DEBLOCK 2
- /**
- * dsp_mask could be add used to disable unwanted CPU features
- * CPU features (i.e. MMX, SSE. ...)
- *
- * With the FORCE flag you may instead enable given CPU features.
- * (Dangerous: Usable in case of misdetection, improper usage however will
- * result into program crash.)
- */
- unsigned dsp_mask;
- #define FF_MM_FORCE 0x80000000 /* Force usage of selected flags (OR) */
- /* lower 16 bits - CPU features */
- #define FF_MM_MMX 0x0001 ///< standard MMX
- #define FF_MM_3DNOW 0x0004 ///< AMD 3DNOW
- #define FF_MM_MMXEXT 0x0002 ///< SSE integer functions or AMD MMX ext
- #define FF_MM_SSE 0x0008 ///< SSE functions
- #define FF_MM_SSE2 0x0010 ///< PIV SSE2 functions
- #define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
- #define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions
- #define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions
- #define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT
- /**
- * bits per sample/pixel from the demuxer (needed for huffyuv).
- * - encoding: Set by libavcodec.
- * - decoding: Set by user.
- */
- int bits_per_sample;
- /**
- * prediction method (needed for huffyuv)
- * - encoding: Set by user.
- * - decoding: unused
- */
- int prediction_method;
- #define FF_PRED_LEFT 0
- #define FF_PRED_PLANE 1
- #define FF_PRED_MEDIAN 2
- /**
- * sample aspect ratio (0 if unknown)
- * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- AVRational sample_aspect_ratio;
- /**
- * the picture in the bitstream
- * - encoding: Set by libavcodec.
- * - decoding: Set by libavcodec.
- */
- AVFrame *coded_frame;
- /**
- * debug
- * - encoding: Set by user.
- * - decoding: Set by user.
- */
- int debug;
- #define FF_DEBUG_PICT_INFO 1
- #define FF_DEBUG_RC 2
- #define FF_DEBUG_BITSTREAM 4
- #define FF_DEBUG_MB_TYPE 8
- #define FF_DEBUG_QP 16
- #define FF_DEBUG_MV 32
- #define FF_DEBUG_DCT_COEFF 0x00000040
- #define FF_DEBUG_SKIP 0x00000080
- #define FF_DEBUG_STARTCODE 0x00000100
- #define FF_DEBUG_PTS 0x00000200
- #define FF_DEBUG_ER 0x00000400
- #define FF_DEBUG_MMCO 0x00000800
- #define FF_DEBUG_BUGS 0x00001000
- #define FF_DEBUG_VIS_QP 0x00002000
- #define FF_DEBUG_VIS_MB_TYPE 0x00004000
- /**
- * debug
- * - 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
- /**
- * error
- * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
- * - decoding: unused
- */
- uint64_t error[4];
- /**
- * minimum MB quantizer
- * - encoding: unused
- * - decoding: unused
- */
- int mb_qmin;
- /**
- * maximum MB quantizer
- * - encoding: unused
- * - decoding: unused
- */
- int mb_qmax;
- /**
- * motion estimation comparison function
- * - encoding: Set by user.
- * - decoding: unused
- */
- int me_cmp;
- /**
- * subpixel motion estimation comparison function
- * - encoding: Set by user.
- * - decoding: unused
- */
- int me_sub_cmp;
- /**
- * macroblock comparison function (not supported yet)
- * - encoding: Set by user.
- * - decoding: unused
- */
- int mb_cmp;
- /**
- * interlaced DCT comparison function
- * - encoding: Set by user.
- * - 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_W53 11
- #define FF_CMP_W97 12
- #define FF_CMP_DCTMAX 13
- #define FF_CMP_DCT264 14
- #define FF_CMP_CHROMA 256
- /**
- * ME diamond size & shape
- * - encoding: Set by user.
- * - decoding: unused
- */
- int dia_size;
- /**
- * amount of previous MV predictors (2a+1 x 2a+1 square)
- * - encoding: Set by user.
- * - decoding: unused
- */
- int last_predictor_count;
- /**
- * prepass for motion estimation
- * - encoding: Set by user.
- * - decoding: unused
- */
- int pre_me;
- /**
- * motion estimation prepass comparison function
- * - encoding: Set by user.
- * - decoding: unused
- */
- int me_pre_cmp;
- /**
- * ME prepass diamond size & shape
- * - encoding: Set by user.
- * - decoding: unused
- */
- int pre_dia_size;
- /**
- * subpel ME quality
- * - encoding: Set by user.
- * - decoding: unused
- */
- int me_subpel_quality;
- /**
- * callback to negotiate the pixelFormat
- * @param fmt is the list of formats which are supported by the codec,
- * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
- * The first is always the native one.
- * @return the chosen format
- * - encoding: unused
- * - decoding: Set by user, if not set the native format will be chosen.
- */
- enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
- /**
- * DTG active format information (additional aspect ratio
- * information only used in DVB MPEG-2 transport streams)
- * 0 if not set.
- *
- * - encoding: unused
- * - decoding: Set by decoder.
- */
- int dtg_active_format;
- #define FF_DTG_AFD_SAME 8
- #define FF_DTG_AFD_4_3 9
- #define FF_DTG_AFD_16_9 10
- #define FF_DTG_AFD_14_9 11
- #define FF_DTG_AFD_4_3_SP_14_9 13
- #define FF_DTG_AFD_16_9_SP_14_9 14
- #define FF_DTG_AFD_SP_4_3 15
- /**
- * maximum motion estimation search range in subpel units
- * If 0 then no limit.
- *
- * - encoding: Set by user.
- * - decoding: unused
- */
- int me_range;
- /**
- * intra quantizer bias
- * - encoding: Set by user.
- * - decoding: unused
- */
- int intra_quant_bias;
- #define FF_DEFAULT_QUANT_BIAS 999999
- /**
- * inter quantizer bias
- * - encoding: Set by user.
- * - decoding: unused
- */
- int inter_quant_bias;
- /**
- * color table ID
- * - encoding: unused
- * - decoding: Which clrtable should be used for 8bit RGB images.
- * Tables have to be stored somewhere. FIXME
- */
- int color_table_id;
- /**
- * internal_buffer count
- * Don't touch, used by libavcodec default_get_buffer().
- */
- int internal_buffer_count;
- /**
- * internal_buffers
- * Don't touch, used by libavcodec default_get_buffer().
- */
- void *internal_buffer;
- #define FF_LAMBDA_SHIFT 7
- #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
- #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
- #define FF_LAMBDA_MAX (256*128-1)
- #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
- /**
- * Global quality for codecs which cannot change it per frame.
- * This should be proportional to MPEG-1/2/4 qscale.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int global_quality;
- #define FF_CODER_TYPE_VLC 0
- #define FF_CODER_TYPE_AC 1
- #define FF_CODER_TYPE_RAW 2
- #define FF_CODER_TYPE_RLE 3
- #define FF_CODER_TYPE_DEFLATE 4
- /**
- * coder type
- * - encoding: Set by user.
- * - decoding: unused
- */
- int coder_type;
- /**
- * context model
- * - encoding: Set by user.
- * - decoding: unused
- */
- int context_model;
- #if 0
- /**
- *
- * - encoding: unused
- * - decoding: Set by user.
- */
- uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
- #endif
- /**
- * slice flags
- * - encoding: unused
- * - decoding: Set by user.
- */
- 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_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
- /**
- * XVideo Motion Acceleration
- * - encoding: forbidden
- * - decoding: set by decoder
- */
- int xvmc_acceleration;
- /**
- * macroblock decision mode
- * - encoding: Set by user.
- * - decoding: unused
- */
- int mb_decision;
- #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
- #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
- #define FF_MB_DECISION_RD 2 ///< rate distortion
- /**
- * custom intra quantization matrix
- * - encoding: Set by user, can be NULL.
- * - decoding: Set by libavcodec.
- */
- uint16_t *intra_matrix;
- /**
- * custom inter quantization matrix
- * - encoding: Set by user, can be NULL.
- * - decoding: Set by libavcodec.
- */
- uint16_t *inter_matrix;
- /**
- * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
- * This is used to work around some encoder bugs.
- * - encoding: unused
- * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
- */
- unsigned int stream_codec_tag;
- /**
- * scene change detection threshold
- * 0 is default, larger means fewer detected scene changes.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int scenechange_threshold;
- /**
- * minimum Lagrange multipler
- * - encoding: Set by user.
- * - decoding: unused
- */
- int lmin;
- /**
- * maximum Lagrange multipler
- * - encoding: Set by user.
- * - decoding: unused
- */
- int lmax;
- /**
- * palette control structure
- * - encoding: ??? (no palette-enabled encoder yet)
- * - decoding: Set by user.
- */
- struct AVPaletteControl *palctrl;
- /**
- * noise reduction strength
- * - encoding: Set by user.
- * - decoding: unused
- */
- int noise_reduction;
- /**
- * Called at the beginning of a frame to get cr buffer for it.
- * Buffer type (size, hints) must be the same. libavcodec won't check it.
- * libavcodec will pass previous buffer in pic, function should return
- * same buffer or new buffer with old frame "painted" into it.
- * If pic.data[0] == NULL must behave like get_buffer().
- * - encoding: unused
- * - decoding: Set by libavcodec., user can override
- */
- int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
- /**
- * Number of bits which should be loaded into the rc buffer before decoding starts.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int rc_initial_buffer_occupancy;
- /**
- *
- * - encoding: Set by user.
- * - decoding: unused
- */
- int inter_threshold;
- /**
- * CODEC_FLAG2_*
- * - encoding: Set by user.
- * - decoding: Set by user.
- */
- int flags2;
- /**
- * Simulates errors in the bitstream to test error concealment.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int error_rate;
- /**
- * MP3 antialias algorithm, see FF_AA_* below.
- * - encoding: unused
- * - decoding: Set by user.
- */
- int antialias_algo;
- #define FF_AA_AUTO 0
- #define FF_AA_FASTINT 1 //not implemented yet
- #define FF_AA_INT 2
- #define FF_AA_FLOAT 3
- /**
- * quantizer noise shaping
- * - encoding: Set by user.
- * - decoding: unused
- */
- int quantizer_noise_shaping;
- /**
- * thread count
- * is used to decide how many independent tasks should be passed to execute()
- * - encoding: Set by user.
- * - decoding: Set by user.
- */
- int thread_count;
- /**
- * The codec may call this to execute several independent things.
- * It will return only after finishing all tasks.
- * The user may replace this with some multithreaded implementation,
- * the default implementation will execute the parts serially.
- * @param count the number of things to execute
- * - encoding: Set by libavcodec, user can override.
- * - decoding: Set by libavcodec, user can override.
- */
- int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
- /**
- * thread opaque
- * Can be used by execute() to store some per AVCodecContext stuff.
- * - encoding: set by execute()
- * - decoding: set by execute()
- */
- void *thread_opaque;
- /**
- * Motion estimation threshold below which no motion estimation is
- * performed, but instead the user specified motion vectors are used.
- *
- * - encoding: Set by user.
- * - decoding: unused
- */
- int me_threshold;
- /**
- * Macroblock threshold below which the user specified macroblock types will be used.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int mb_threshold;
- /**
- * precision of the intra DC coefficient - 8
- * - encoding: Set by user.
- * - decoding: unused
- */
- int intra_dc_precision;
- /**
- * noise vs. sse weight for the nsse comparsion function
- * - encoding: Set by user.
- * - decoding: unused
- */
- int nsse_weight;
- /**
- * Number of macroblock rows at the top which are skipped.
- * - encoding: unused
- * - decoding: Set by user.
- */
- int skip_top;
- /**
- * Number of macroblock rows at the bottom which are skipped.
- * - encoding: unused
- * - decoding: Set by user.
- */
- int skip_bottom;
- /**
- * profile
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- int profile;
- #define FF_PROFILE_UNKNOWN -99
- #define FF_PROFILE_AAC_MAIN 0
- #define FF_PROFILE_AAC_LOW 1
- #define FF_PROFILE_AAC_SSR 2
- #define FF_PROFILE_AAC_LTP 3
- /**
- * level
- * - encoding: Set by user.
- * - decoding: Set by libavcodec.
- */
- int level;
- #define FF_LEVEL_UNKNOWN -99
- /**
- * low resolution decoding, 1-> 1/2 size, 2->1/4 size
- * - encoding: unused
- * - decoding: Set by user.
- */
- int lowres;
- /**
- * Bitstream width / height, may be different from width/height if lowres
- * or other things are used.
- * - encoding: unused
- * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
- */
- int coded_width, coded_height;
- /**
- * frame skip threshold
- * - encoding: Set by user.
- * - decoding: unused
- */
- int frame_skip_threshold;
- /**
- * frame skip factor
- * - encoding: Set by user.
- * - decoding: unused
- */
- int frame_skip_factor;
- /**
- * frame skip exponent
- * - encoding: Set by user.
- * - decoding: unused
- */
- int frame_skip_exp;
- /**
- * frame skip comparison function
- * - encoding: Set by user.
- * - decoding: unused
- */
- int frame_skip_cmp;
- /**
- * Border processing masking, raises the quantizer for mbs on the borders
- * of the picture.
- * - encoding: Set by user.
- * - decoding: unused
- */
- float border_masking;
- /**
- * minimum MB lagrange multipler
- * - encoding: Set by user.
- * - decoding: unused
- */
- int mb_lmin;
- /**
- * maximum MB lagrange multipler
- * - encoding: Set by user.
- * - decoding: unused
- */
- int mb_lmax;
- /**
- *
- * - encoding: Set by user.
- * - decoding: unused
- */
- int me_penalty_compensation;
- /**
- *
- * - encoding: unused
- * - decoding: Set by user.
- */
- enum AVDiscard skip_loop_filter;
- /**
- *
- * - encoding: unused
- * - decoding: Set by user.
- */
- enum AVDiscard skip_idct;
- /**
- *
- * - encoding: unused
- * - decoding: Set by user.
- */
- enum AVDiscard skip_frame;
- /**
- *
- * - encoding: Set by user.
- * - decoding: unused
- */
- int bidir_refine;
- /**
- *
- * - encoding: Set by user.
- * - decoding: unused
- */
- int brd_scale;
- /**
- * constant rate factor - quality-based VBR - values ~correspond to qps
- * - encoding: Set by user.
- * - decoding: unused
- */
- float crf;
- /**
- * constant quantization parameter rate control method
- * - encoding: Set by user.
- * - decoding: unused
- */
- int cqp;
- /**
- * minimum GOP size
- * - encoding: Set by user.
- * - decoding: unused
- */
- int keyint_min;
- /**
- * number of reference frames
- * - encoding: Set by user.
- * - decoding: unused
- */
- int refs;
- /**
- * chroma qp offset from luma
- * - encoding: Set by user.
- * - decoding: unused
- */
- int chromaoffset;
- /**
- * Influences how often B-frames are used.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int bframebias;
- /**
- * trellis RD quantization
- * - encoding: Set by user.
- * - decoding: unused
- */
- int trellis;
- /**
- * Reduce fluctuations in qp (before curve compression).
- * - encoding: Set by user.
- * - decoding: unused
- */
- float complexityblur;
- /**
- * in-loop deblocking filter alphac0 parameter
- * alpha is in the range -6...6
- * - encoding: Set by user.
- * - decoding: unused
- */
- int deblockalpha;
- /**
- * in-loop deblocking filter beta parameter
- * beta is in the range -6...6
- * - encoding: Set by user.
- * - decoding: unused
- */
- int deblockbeta;
- /**
- * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
- * - encoding: Set by user.
- * - decoding: unused
- */
- int partitions;
- #define X264_PART_I4X4 0x001 /* Analyze i4x4 */
- #define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
- #define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
- #define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */
- #define X264_PART_B8X8 0x100 /* Analyze b16x8, b8x16 and b8x8 */
- /**
- * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal)
- * - encoding: Set by user.
- * - decoding: unused
- */
- int directpred;
- /**
- * Audio cutoff bandwidth (0 means "automatic")
- * - encoding: Set by user.
- * - decoding: unused
- */
- int cutoff;
- /**
- * Multiplied by qscale for each frame and added to scene_change_score.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int scenechange_factor;
- /**
- *
- * Note: Value depends upon the compare function used for fullpel ME.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int mv0_threshold;
- /**
- * Adjusts sensitivity of b_frame_strategy 1.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int b_sensitivity;
- /**
- * - encoding: Set by user.
- * - decoding: unused
- */
- int compression_level;
- #define FF_COMPRESSION_DEFAULT -1
- /**
- * Sets whether to use LPC mode - used by FLAC encoder.
- * - encoding: Set by user.
- * - decoding: unused
- */
- int use_lpc;
- /**
- * LPC coefficient precision - used by FLAC encoder
- * - encoding: Set by user.
- * - decoding: unused
- */
- int lpc_coeff_precision;
- /**
- * - encoding: Set by user.
- * - decoding: unused
- */
- int min_prediction_order;
- /**
- * - encoding: Set by user.
- * - decoding: unused
- */
- int max_prediction_order;
- /**
- * search method for selecting prediction order
- * - encoding: Set by user.
- * - decoding: unused
- */
- int prediction_order_method;
- /**
- * - encoding: Set by user.
- * - decoding: unused
- */
- int min_partition_order;
- /**
- * - encoding: Set by user.
- * - decoding: unused
- */
- int max_partition_order;
- /**
- * GOP timecode frame start number, in non drop frame format
- * - encoding: Set by user.
- * - decoding: unused
- */
- int64_t timecode_frame_start;
- /**
- * Decoder should decode to this many channels if it can (0 for default)
- * - encoding: unused
- * - decoding: Set by user.
- */
- int request_channels;
- /**
- * Percentage of dynamic range compression to be applied by the decoder.
- * The default value is 1.0, corresponding to full compression.
- * - encoding: unused
- * - decoding: Set by user.
- */
- float drc_scale;
- } AVCodecContext;
- /**
- * AVCodec.
- */
- typedef struct AVCodec {
- /**
- * Name of the codec implementation.
- * The name is globally unique among encoders and among decoders (but an
- * encoder and a decoder can share the same name).
- * This is the primary way to find a codec from the user perspective.
- */
- const char *name;
- enum CodecType type;
- enum CodecID id;
- int priv_data_size;
- int (*init)(AVCodecContext *);
- int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
- int (*close)(AVCodecContext *);
- int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
- const uint8_t *buf, int buf_size);
- /**
- * Codec capabilities.
- * see CODEC_CAP_*
- */
- int capabilities;
- struct AVCodec *next;
- /**
- * Flush buffers.
- * Will be called when seeking
- */
- void (*flush)(AVCodecContext *);
- const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
- const enum PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
- /**
- * Descriptive name for the codec, meant to be more human readable than p name.
- * You e should use the NULL_IF_CONFIG_SMALL() macro to define it.
- */
- const char *long_name;
- const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
- } AVCodec;
- /**
- * four components are given, that's all.
- * the last component is alpha
- */
- typedef struct AVPicture {
- uint8_t *data[4];
- int linesize[4]; ///< number of bytes per line
- } AVPicture;
- /**
- * AVPaletteControl
- * This structure defines a method for communicating palette changes
- * between and demuxer and a decoder.
- *
- * @deprecated Use AVPacket to send palette changes instead.
- * This is totally broken.
- */
- #define AVPALETTE_SIZE 1024
- #define AVPALETTE_COUNT 256
- typedef struct AVPaletteControl {
- /* Demuxer sets this to 1 to indicate the palette has changed;
- * decoder resets to 0. */
- int palette_changed;
- /* 4-byte ARGB palette entries, stored in native byte order; note that
- * the individual palette components should be on a 8-bit scale; if
- * the palette data comes from an IBM VGA native format, the component
- * data is probably 6 bits in size and needs to be scaled. */
- unsigned int palette[AVPALETTE_COUNT];
- } AVPaletteControl attribute_deprecated;
- typedef struct AVSubtitleRect {
- uint16_t x;
- uint16_t y;
- uint16_t w;
- uint16_t h;
- uint16_t nb_colors;
- int linesize;
- uint32_t *rgba_palette;
- uint8_t *bitmap;
- } AVSubtitleRect;
- typedef struct AVSubtitle {
- uint16_t format; /* 0 = graphics */
- uint32_t start_display_time; /* relative to packet pts, in ms */
- uint32_t end_display_time; /* relative to packet pts, in ms */
- uint32_t num_rects;
- AVSubtitleRect *rects;
- } AVSubtitle;
- /* resample.c */
- struct ReSampleContext;
- struct AVResampleContext;
- typedef struct ReSampleContext ReSampleContext;
- ReSampleContext *audio_resample_init(int output_channels, int input_channels,
- int output_rate, int input_rate);
- int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
- void audio_resample_close(ReSampleContext *s);
- struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
- int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
- void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
- void av_resample_close(struct AVResampleContext *c);
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- /* YUV420 format is assumed ! */
- /**
- * @deprecated Use the software scaler (swscale) instead.
- */
- typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
- /**
- * @deprecated Use the software scaler (swscale) instead.
- */
- attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
- int input_width, int input_height);
- /**
- * @deprecated Use the software scaler (swscale) instead.
- */
- attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
- int iwidth, int iheight,
- int topBand, int bottomBand,
- int leftBand, int rightBand,
- int padtop, int padbottom,
- int padleft, int padright);
- /**
- * @deprecated Use the software scaler (swscale) instead.
- */
- attribute_deprecated void img_resample(struct ImgReSampleContext *s,
- AVPicture *output, const AVPicture *input);
- /**
- * @deprecated Use the software scaler (swscale) instead.
- */
- attribute_deprecated void img_resample_close(struct ImgReSampleContext *s);
- #endif
- /**
- * Allocate memory for a picture. Call avpicture_free to free it.
- *
- * @param picture the picture to be filled in
- * @param pix_fmt the format of the picture
- * @param width the width of the picture
- * @param height the height of the picture
- * @return zero if successful, a negative value if not
- */
- int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
- /**
- * Free a picture previously allocated by avpicture_alloc().
- *
- * @param picture the AVPicture to be freed
- */
- void avpicture_free(AVPicture *picture);
- /**
- * Fill in the AVPicture fields.
- * The fields of the given AVPicture are filled in by using the 'ptr' address
- * which points to the image data buffer. Depending on the specified picture
- * format, one or multiple image data pointers and line sizes will be set.
- * If a planar format is specified, several pointers will be set pointing to
- * the different picture planes and the line sizes of the different planes
- * will be stored in the lines_sizes array.
- *
- * @param picture AVPicture whose fields are to be filled in
- * @param ptr Buffer which will contain or contains the actual image data
- * @param pix_fmt The format in which the picture data is stored.
- * @param width the width of the image in pixels
- * @param height the height of the image in pixels
- * @return size of the image data in bytes
- */
- int avpicture_fill(AVPicture *picture, uint8_t *ptr,
- int pix_fmt, int width, int height);
- int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
- unsigned char *dest, int dest_size);
- /**
- * Calculate the size in bytes that a picture of the given width and height
- * would occupy if stored in the given picture format.
- *
- * @param pix_fmt the given picture format
- * @param width the width of the image
- * @param height the height of the image
- * @return Image data size in bytes
- */
- int avpicture_get_size(int pix_fmt, int width, int height);
- void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
- const char *avcodec_get_pix_fmt_name(int pix_fmt);
- void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
- enum PixelFormat avcodec_get_pix_fmt(const char* name);
- unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
- #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) */
- /**
- * Computes 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.
- */
- int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
- int has_alpha);
- /**
- * Finds the best pixel format to convert to given a certain source pixel
- * 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_fmt() 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
- * p pix_fmt_mask parameter.
- *
- * @code
- * src_pix_fmt = PIX_FMT_YUV420P;
- * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
- * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
- * @endcode
- *
- * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
- * @param[in] src_pix_fmt source pixel format
- * @param[in] has_alpha Whether the source pixel format alpha channel is used.
- * @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.
- */
- int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
- int has_alpha, int *loss_ptr);
- /**
- * Print in buf the string corresponding to the pixel format with
- * number pix_fmt, or an header if pix_fmt is negative.
- *
- * @param[in] buf the buffer where to write the string
- * @param[in] buf_size the size of buf
- * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
- * a negative value to print the corresponding header.
- * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
- */
- void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt);
- #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
- #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
- /**
- * Tell if an image really has transparent alpha values.
- * @return ored mask of FF_ALPHA_xxx constants
- */
- int img_get_alpha_info(const AVPicture *src,
- int pix_fmt, int width, int height);
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- /**
- * convert among pixel formats
- * @deprecated Use the software scaler (swscale) instead.
- */
- attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
- const AVPicture *src, int pix_fmt,
- int width, int height);
- #endif
- /* deinterlace a picture */
- /* deinterlace - if not supported return -1 */
- int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
- int pix_fmt, int width, int height);
- /* external high level API */
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- extern AVCodec *first_avcodec;
- #endif
- AVCodec *av_codec_next(AVCodec *c);
- /* returns LIBAVCODEC_VERSION_INT constant */
- unsigned avcodec_version(void);
- /* returns LIBAVCODEC_BUILD constant */
- unsigned avcodec_build(void);
- /**
- * Initializes libavcodec.
- *
- * @warning This function e must be called before any other libavcodec
- * function.
- */
- void avcodec_init(void);
- void register_avcodec(AVCodec *format);
- /**
- * Finds a registered encoder with a matching codec ID.
- *
- * @param id CodecID of the requested encoder
- * @return An encoder if one was found, NULL otherwise.
- */
- AVCodec *avcodec_find_encoder(enum CodecID id);
- /**
- * Finds a registered encoder with the specified name.
- *
- * @param name name of the requested encoder
- * @return An encoder if one was found, NULL otherwise.
- */
- AVCodec *avcodec_find_encoder_by_name(const char *name);
- /**
- * Finds a registered decoder with a matching codec ID.
- *
- * @param id CodecID of the requested decoder
- * @return A decoder if one was found, NULL otherwise.
- */
- AVCodec *avcodec_find_decoder(enum CodecID id);
- /**
- * Finds a registered decoder with the specified name.
- *
- * @param name name of the requested decoder
- * @return A decoder if one was found, NULL otherwise.
- */
- AVCodec *avcodec_find_decoder_by_name(const char *name);
- void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
- /**
- * Sets the fields of the given AVCodecContext to default values.
- *
- * @param s The AVCodecContext of which the fields should be set to default values.
- */
- void avcodec_get_context_defaults(AVCodecContext *s);
- /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
- * we WILL change its arguments and name a few times! */
- void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
- /**
- * Allocates an AVCodecContext and sets its fields to default values. The
- * resulting struct can be deallocated by simply calling av_free().
- *
- * @return An AVCodecContext filled with default values or NULL on failure.
- * @see avcodec_get_context_defaults
- */
- AVCodecContext *avcodec_alloc_context(void);
- /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
- * we WILL change its arguments and name a few times! */
- AVCodecContext *avcodec_alloc_context2(enum CodecType);
- /**
- * Sets the fields of the given AVFrame to default values.
- *
- * @param pic The AVFrame of which the fields should be set to default values.
- */
- void avcodec_get_frame_defaults(AVFrame *pic);
- /**
- * Allocates an AVFrame and sets its fields to default values. The resulting
- * struct can be deallocated by simply calling av_free().
- *
- * @return An AVFrame filled with default values or NULL on failure.
- * @see avcodec_get_frame_defaults
- */
- AVFrame *avcodec_alloc_frame(void);
- int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
- void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
- int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
- void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
- /**
- * Checks if the given dimension of a picture is valid, meaning that all
- * bytes of the picture can be addressed with a signed int.
- *
- * @param[in] w Width of the picture.
- * @param[in] h Height of the picture.
- * @return Zero if valid, a negative value if invalid.
- */
- int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
- enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
- int avcodec_thread_init(AVCodecContext *s, int thread_count);
- void avcodec_thread_free(AVCodecContext *s);
- int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
- int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
- //FIXME func typedef
- /**
- * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
- * function the context has to be allocated.
- *
- * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
- * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
- * retrieving a codec.
- *
- * @warning This function is not thread safe!
- *
- * @code
- * avcodec_register_all();
- * codec = avcodec_find_decoder(CODEC_ID_H264);
- * if (!codec)
- * exit(1);
- *
- * context = avcodec_alloc_context();
- *
- * if (avcodec_open(context, codec) < 0)
- * exit(1);
- * @endcode
- *
- * @param avctx The context which will be set up to use the given codec.
- * @param codec The codec to use within the context.
- * @return zero on success, a negative value on error
- * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
- */
- int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
- /**
- * @deprecated Use avcodec_decode_audio2() instead.
- */
- attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
- int *frame_size_ptr,
- const uint8_t *buf, int buf_size);
- /**
- * Decodes an audio frame from p buf into p samples.
- * The avcodec_decode_audio2() function decodes an audio frame from the input
- * buffer p buf of size p buf_size. To decode it, it makes use of the
- * audio codec which was coupled with p avctx using avcodec_open(). The
- * resulting decoded frame is stored in output buffer p samples. If no frame
- * could be decompressed, p frame_size_ptr is zero. Otherwise, it is the
- * decompressed frame size in e bytes.
- *
- * @warning You e must set p frame_size_ptr to the allocated size of the
- * output buffer before calling avcodec_decode_audio2().
- *
- * @warning The input buffer must be c FF_INPUT_BUFFER_PADDING_SIZE larger than
- * the actual read bytes because some optimized bitstream readers read 32 or 64
- * bits at once and could read over the end.
- *
- * @warning The end of the input buffer p buf should be set to 0 to ensure that
- * no overreading happens for damaged MPEG streams.
- *
- * @note You might have to align the input buffer p buf and output buffer p
- * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
- * necessary at all, on others it won't work at all if not aligned and on others
- * it will work but it will have an impact on performance. In practice, the
- * bitstream should have 4 byte alignment at minimum and all sample data should
- * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
- * the linesize is not a multiple of 16 then there's no sense in aligning the
- * start of the buffer to 16.
- *
- * @param avctx the codec context
- * @param[out] samples the output buffer
- * @param[in,out] frame_size_ptr the output buffer size in bytes
- * @param[in] buf the input buffer
- * @param[in] buf_size the input buffer size in bytes
- * @return On error a negative value is returned, otherwise the number of bytes
- * used or zero if no frame could be decompressed.
- */
- int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
- int *frame_size_ptr,
- const uint8_t *buf, int buf_size);
- /**
- * Decodes a video frame from p buf into p picture.
- * The avcodec_decode_video() function decodes a video frame from the input
- * buffer p buf of size p buf_size. To decode it, it makes use of the
- * video codec which was coupled with p avctx using avcodec_open(). The
- * resulting decoded frame is stored in p picture.
- *
- * @warning The input buffer must be c FF_INPUT_BUFFER_PADDING_SIZE larger than
- * the actual read bytes because some optimized bitstream readers read 32 or 64
- * bits at once and could read over the end.
- *
- * @warning The end of the input buffer p buf should be set to 0 to ensure that
- * no overreading happens for damaged MPEG streams.
- *
- * @note You might have to align the input buffer p buf and output buffer p
- * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
- * necessary at all, on others it won't work at all if not aligned and on others
- * it will work but it will have an impact on performance. In practice, the
- * bitstream should have 4 byte alignment at minimum and all sample data should
- * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
- * the linesize is not a multiple of 16 then there's no sense in aligning the
- * start of the buffer to 16.
- *
- * @param avctx the codec context
- * @param[out] picture The AVFrame in which the decoded video frame will be stored.
- * @param[in] buf the input buffer
- * @param[in] buf_size the size of the input buffer in bytes
- * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
- * @return On error a negative value is returned, otherwise the number of bytes
- * used or zero if no frame could be decompressed.
- */
- int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
- int *got_picture_ptr,
- const uint8_t *buf, int buf_size);
- /* Decode a subtitle message. Return -1 if error, otherwise return the
- * number of bytes used. If no subtitle could be decompressed,
- * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
- int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
- int *got_sub_ptr,
- const uint8_t *buf, int buf_size);
- int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
- int *data_size_ptr,
- uint8_t *buf, int buf_size);
- /**
- * Encodes an audio frame from p samples into p buf.
- * The avcodec_encode_audio() function encodes an audio frame from the input
- * buffer p samples. To encode it, it makes use of the audio codec which was
- * coupled with p avctx using avcodec_open(). The resulting encoded frame is
- * stored in output buffer p buf.
- *
- * @note The output buffer should be at least c FF_MIN_BUFFER_SIZE bytes large.
- *
- * @param avctx the codec context
- * @param[out] buf the output buffer
- * @param[in] buf_size the output buffer size
- * @param[in] samples the input buffer containing the samples
- * The number of samples read from this buffer is frame_size*channels,
- * both of which are defined in p avctx.
- * For PCM audio the number of samples read from p samples is equal to
- * p buf_size * input_sample_size / output_sample_size.
- * @return On error a negative value is returned, on success zero or the number
- * of bytes used to encode the data read from the input buffer.
- */
- int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
- const short *samples);
- /**
- * Encodes a video frame from p pict into p buf.
- * The avcodec_encode_video() function encodes a video frame from the input
- * p pict. To encode it, it makes use of the video codec which was coupled with
- * p avctx using avcodec_open(). The resulting encoded bytes representing the
- * frame are stored in the output buffer p buf. The input picture should be
- * stored using a specific format, namely c avctx.pix_fmt.
- *
- * @param avctx the codec context
- * @param[out] buf the output buffer for the bitstream of encoded frame
- * @param[in] buf_size the size of the output buffer in bytes
- * @param[in] pict the input picture to encode
- * @return On error a negative value is returned, on success zero or the number
- * of bytes used from the input buffer.
- */
- int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
- const AVFrame *pict);
- int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
- const AVSubtitle *sub);
- int avcodec_close(AVCodecContext *avctx);
- void avcodec_register_all(void);
- /**
- * Flush buffers, should be called when seeking or when switching to a different stream.
- */
- void avcodec_flush_buffers(AVCodecContext *avctx);
- void avcodec_default_free_buffers(AVCodecContext *s);
- /* misc useful functions */
- /**
- * Returns a single letter to describe the given picture type p pict_type.
- *
- * @param[in] pict_type the picture type
- * @return A single character representing the picture type.
- */
- char av_get_pict_type_char(int pict_type);
- /**
- * Returns codec bits per sample.
- *
- * @param[in] codec_id the codec
- * @return Number of bits per sample or zero if unknown for the given codec.
- */
- int av_get_bits_per_sample(enum CodecID codec_id);
- /**
- * Returns sample format bits per sample.
- *
- * @param[in] sample_fmt the sample format
- * @return Number of bits per sample or zero if unknown for the given sample format.
- */
- int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
- /* frame parsing */
- typedef struct AVCodecParserContext {
- void *priv_data;
- struct AVCodecParser *parser;
- int64_t frame_offset; /* offset of the current frame */
- int64_t cur_offset; /* current offset
- (incremented by each av_parser_parse()) */
- int64_t next_frame_offset; /* offset of the next frame */
- /* video info */
- int pict_type; /* XXX: Put it back in AVCodecContext. */
- int repeat_pict; /* XXX: Put it back in AVCodecContext. */
- int64_t pts; /* pts of the current frame */
- int64_t dts; /* dts of the current frame */
- /* private data */
- int64_t last_pts;
- int64_t last_dts;
- int fetch_timestamp;
- #define AV_PARSER_PTS_NB 4
- int cur_frame_start_index;
- int64_t cur_frame_offset[AV_PARSER_PTS_NB];
- int64_t cur_frame_pts[AV_PARSER_PTS_NB];
- int64_t cur_frame_dts[AV_PARSER_PTS_NB];
- int flags;
- #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
- int64_t offset; ///< byte offset from starting packet start
- int64_t cur_frame_end[AV_PARSER_PTS_NB];
- } AVCodecParserContext;
- typedef struct AVCodecParser {
- int codec_ids[5]; /* several codec IDs are permitted */
- int priv_data_size;
- int (*parser_init)(AVCodecParserContext *s);
- int (*parser_parse)(AVCodecParserContext *s,
- AVCodecContext *avctx,
- const uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size);
- void (*parser_close)(AVCodecParserContext *s);
- int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
- struct AVCodecParser *next;
- } AVCodecParser;
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- extern AVCodecParser *av_first_parser;
- #endif
- AVCodecParser *av_parser_next(AVCodecParser *c);
- void av_register_codec_parser(AVCodecParser *parser);
- AVCodecParserContext *av_parser_init(int codec_id);
- int av_parser_parse(AVCodecParserContext *s,
- AVCodecContext *avctx,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size,
- int64_t pts, int64_t dts);
- int av_parser_change(AVCodecParserContext *s,
- AVCodecContext *avctx,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe);
- void av_parser_close(AVCodecParserContext *s);
- typedef struct AVBitStreamFilterContext {
- void *priv_data;
- struct AVBitStreamFilter *filter;
- AVCodecParserContext *parser;
- struct AVBitStreamFilterContext *next;
- } AVBitStreamFilterContext;
- typedef struct AVBitStreamFilter {
- const char *name;
- int priv_data_size;
- int (*filter)(AVBitStreamFilterContext *bsfc,
- AVCodecContext *avctx, const char *args,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe);
- void (*close)(AVBitStreamFilterContext *bsfc);
- struct AVBitStreamFilter *next;
- } AVBitStreamFilter;
- void av_register_bitstream_filter(AVBitStreamFilter *bsf);
- AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
- 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);
- void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
- AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
- /* memory */
- /**
- * Reallocates the given block if it is not large enough, otherwise it
- * does nothing.
- *
- * @see av_realloc
- */
- void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
- /**
- * Copy image 'src' to 'dst'.
- */
- void av_picture_copy(AVPicture *dst, const AVPicture *src,
- int pix_fmt, int width, int height);
- /**
- * Crop image top and left side.
- */
- int av_picture_crop(AVPicture *dst, const AVPicture *src,
- int pix_fmt, int top_band, int left_band);
- /**
- * Pad image.
- */
- int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
- int padtop, int padbottom, int padleft, int padright, int *color);
- #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
- /**
- * @deprecated Use the software scaler (swscale) instead.
- */
- attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src,
- int pix_fmt, int width, int height);
- /**
- * @deprecated Use the software scaler (swscale) instead.
- */
- attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src,
- int pix_fmt, int top_band, int left_band);
- /**
- * @deprecated Use the software scaler (swscale) instead.
- */
- attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
- int padtop, int padbottom, int padleft, int padright, int *color);
- #endif
- extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
- /**
- * Parses p str and put in p width_ptr and p height_ptr the detected values.
- *
- * @return 0 in case of a successful parsing, a negative value otherwise
- * @param[in] str the string to parse: it has to be a string in the format
- * <width>x<height> or a valid video frame size abbreviation.
- * @param[in,out] width_ptr pointer to the variable which will contain the detected
- * frame width value
- * @param[in,out] height_ptr pointer to the variable which will contain the detected
- * frame height value
- */
- int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
- /**
- * Parses p str and put in p frame_rate the detected values.
- *
- * @return 0 in case of a successful parsing, a negative value otherwise
- * @param[in] str the string to parse: it has to be a string in the format
- * <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation
- * @param[in,out] frame_rate pointer to the AVRational which will contain the detected
- * frame rate
- */
- int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
- /* error handling */
- #if EINVAL > 0
- #define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
- #define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
- #else
- /* Some platforms have E* and errno already negated. */
- #define AVERROR(e) (e)
- #define AVUNERROR(e) (e)
- #endif
- #define AVERROR_UNKNOWN AVERROR(EINVAL) /**< unknown error */
- #define AVERROR_IO AVERROR(EIO) /**< I/O error */
- #define AVERROR_NUMEXPECTED AVERROR(EDOM) /**< Number syntax expected in filename. */
- #define AVERROR_INVALIDDATA AVERROR(EINVAL) /**< invalid data found */
- #define AVERROR_NOMEM AVERROR(ENOMEM) /**< not enough memory */
- #define AVERROR_NOFMT AVERROR(EILSEQ) /**< unknown format */
- #define AVERROR_NOTSUPP AVERROR(ENOSYS) /**< Operation not supported. */
- #define AVERROR_NOENT AVERROR(ENOENT) /**< No such file or directory. */
- #define AVERROR_PATCHWELCOME -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
- #endif /* FFMPEG_AVCODEC_H */