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Red Hat Bugzilla – Attachment 572016 Details for
Bug 805958
"internal compiler error: Segmentation fault" error during xbmc compilation
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Related ffmpeg header
avcodec.h (text/plain), 137.22 KB, created by
Gökçen Eraslan
on 2012-03-22 14:52:32 UTC
(
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Description:
Related ffmpeg header
Filename:
MIME Type:
Creator:
Gökçen Eraslan
Created:
2012-03-22 14:52:32 UTC
Size:
137.22 KB
patch
obsolete
>/* > * 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 AVCODEC_AVCODEC_H >#define AVCODEC_AVCODEC_H > >/** > * @file > * external API header > */ > >#include <errno.h> >#include "libavutil/samplefmt.h" >#include "libavutil/avutil.h" >#include "libavutil/cpu.h" >#include "libavutil/dict.h" > >#include "libavcodec/version.h" > >/** > * Identify 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_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, > CODEC_ID_CMV, > CODEC_ID_MOTIONPIXELS, > CODEC_ID_TGV, > CODEC_ID_TGQ, > CODEC_ID_TQI, > CODEC_ID_AURA, > CODEC_ID_AURA2, > CODEC_ID_V210X, > CODEC_ID_TMV, > CODEC_ID_V210, > CODEC_ID_DPX, > CODEC_ID_MAD, > CODEC_ID_FRWU, > CODEC_ID_FLASHSV2, > CODEC_ID_CDGRAPHICS, > CODEC_ID_R210, > CODEC_ID_ANM, > CODEC_ID_BINKVIDEO, > CODEC_ID_IFF_ILBM, > CODEC_ID_IFF_BYTERUN1, > CODEC_ID_KGV1, > CODEC_ID_YOP, > CODEC_ID_VP8, > CODEC_ID_PICTOR, > CODEC_ID_ANSI, > CODEC_ID_A64_MULTI, > CODEC_ID_A64_MULTI5, > CODEC_ID_R10K, > CODEC_ID_MXPEG, > CODEC_ID_LAGARITH, > CODEC_ID_PRORES, > CODEC_ID_JV, > CODEC_ID_DFA, > CODEC_ID_8SVX_RAW, > > /* 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, > CODEC_ID_PCM_F32BE, > CODEC_ID_PCM_F32LE, > CODEC_ID_PCM_F64BE, > CODEC_ID_PCM_F64LE, > CODEC_ID_PCM_BLURAY, > CODEC_ID_PCM_LXF, > CODEC_ID_S302M, > > /* 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, > CODEC_ID_ADPCM_IMA_ISS, > CODEC_ID_ADPCM_G722, > > /* 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, > 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, > CODEC_ID_EAC3, > CODEC_ID_SIPR, > CODEC_ID_MP1, > CODEC_ID_TWINVQ, > CODEC_ID_TRUEHD, > CODEC_ID_MP4ALS, > CODEC_ID_ATRAC1, > CODEC_ID_BINKAUDIO_RDFT, > CODEC_ID_BINKAUDIO_DCT, > CODEC_ID_AAC_LATM, > CODEC_ID_QDMC, > CODEC_ID_CELT, > > /* 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, > CODEC_ID_HDMV_PGS_SUBTITLE, > CODEC_ID_DVB_TELETEXT, > CODEC_ID_SRT, > CODEC_ID_MICRODVD, > > /* other specific kind of codecs (generally used for attachments) */ > CODEC_ID_TTF= 0x18000, > > CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it > > CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS > * stream (only used by libavformat) */ > CODEC_ID_FFMETADATA=0x21000, ///< Dummy codec for streams containing only metadata information. >}; > >#if FF_API_OLD_SAMPLE_FMT >#define SampleFormat AVSampleFormat > >#define SAMPLE_FMT_NONE AV_SAMPLE_FMT_NONE >#define SAMPLE_FMT_U8 AV_SAMPLE_FMT_U8 >#define SAMPLE_FMT_S16 AV_SAMPLE_FMT_S16 >#define SAMPLE_FMT_S32 AV_SAMPLE_FMT_S32 >#define SAMPLE_FMT_FLT AV_SAMPLE_FMT_FLT >#define SAMPLE_FMT_DBL AV_SAMPLE_FMT_DBL >#define SAMPLE_FMT_NB AV_SAMPLE_FMT_NB >#endif > >#if FF_API_OLD_AUDIOCONVERT >#include "libavutil/audioconvert.h" > >/* Audio channel masks */ >#define CH_FRONT_LEFT AV_CH_FRONT_LEFT >#define CH_FRONT_RIGHT AV_CH_FRONT_RIGHT >#define CH_FRONT_CENTER AV_CH_FRONT_CENTER >#define CH_LOW_FREQUENCY AV_CH_LOW_FREQUENCY >#define CH_BACK_LEFT AV_CH_BACK_LEFT >#define CH_BACK_RIGHT AV_CH_BACK_RIGHT >#define CH_FRONT_LEFT_OF_CENTER AV_CH_FRONT_LEFT_OF_CENTER >#define CH_FRONT_RIGHT_OF_CENTER AV_CH_FRONT_RIGHT_OF_CENTER >#define CH_BACK_CENTER AV_CH_BACK_CENTER >#define CH_SIDE_LEFT AV_CH_SIDE_LEFT >#define CH_SIDE_RIGHT AV_CH_SIDE_RIGHT >#define CH_TOP_CENTER AV_CH_TOP_CENTER >#define CH_TOP_FRONT_LEFT AV_CH_TOP_FRONT_LEFT >#define CH_TOP_FRONT_CENTER AV_CH_TOP_FRONT_CENTER >#define CH_TOP_FRONT_RIGHT AV_CH_TOP_FRONT_RIGHT >#define CH_TOP_BACK_LEFT AV_CH_TOP_BACK_LEFT >#define CH_TOP_BACK_CENTER AV_CH_TOP_BACK_CENTER >#define CH_TOP_BACK_RIGHT AV_CH_TOP_BACK_RIGHT >#define CH_STEREO_LEFT AV_CH_STEREO_LEFT >#define CH_STEREO_RIGHT AV_CH_STEREO_RIGHT > >/** Channel mask value used for AVCodecContext.request_channel_layout > to indicate that the user requests the channel order of the decoder output > to be the native codec channel order. */ >#define CH_LAYOUT_NATIVE AV_CH_LAYOUT_NATIVE > >/* Audio channel convenience macros */ >#define CH_LAYOUT_MONO AV_CH_LAYOUT_MONO >#define CH_LAYOUT_STEREO AV_CH_LAYOUT_STEREO >#define CH_LAYOUT_2_1 AV_CH_LAYOUT_2_1 >#define CH_LAYOUT_SURROUND AV_CH_LAYOUT_SURROUND >#define CH_LAYOUT_4POINT0 AV_CH_LAYOUT_4POINT0 >#define CH_LAYOUT_2_2 AV_CH_LAYOUT_2_2 >#define CH_LAYOUT_QUAD AV_CH_LAYOUT_QUAD >#define CH_LAYOUT_5POINT0 AV_CH_LAYOUT_5POINT0 >#define CH_LAYOUT_5POINT1 AV_CH_LAYOUT_5POINT1 >#define CH_LAYOUT_5POINT0_BACK AV_CH_LAYOUT_5POINT0_BACK >#define CH_LAYOUT_5POINT1_BACK AV_CH_LAYOUT_5POINT1_BACK >#define CH_LAYOUT_7POINT0 AV_CH_LAYOUT_7POINT0 >#define CH_LAYOUT_7POINT1 AV_CH_LAYOUT_7POINT1 >#define CH_LAYOUT_7POINT1_WIDE AV_CH_LAYOUT_7POINT1_WIDE >#define CH_LAYOUT_STEREO_DOWNMIX AV_CH_LAYOUT_STEREO_DOWNMIX >#endif > >/* 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 >}; > >enum AVColorPrimaries{ > AVCOL_PRI_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B > AVCOL_PRI_UNSPECIFIED=2, > AVCOL_PRI_BT470M =4, > AVCOL_PRI_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM > AVCOL_PRI_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC > AVCOL_PRI_SMPTE240M =7, ///< functionally identical to above > AVCOL_PRI_FILM =8, > AVCOL_PRI_NB , ///< Not part of ABI >}; > >enum AVColorTransferCharacteristic{ > AVCOL_TRC_BT709 =1, ///< also ITU-R BT1361 > AVCOL_TRC_UNSPECIFIED=2, > AVCOL_TRC_GAMMA22 =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM > AVCOL_TRC_GAMMA28 =5, ///< also ITU-R BT470BG > AVCOL_TRC_NB , ///< Not part of ABI >}; > >enum AVColorSpace{ > AVCOL_SPC_RGB =0, > AVCOL_SPC_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B > AVCOL_SPC_UNSPECIFIED=2, > AVCOL_SPC_FCC =4, > AVCOL_SPC_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 > AVCOL_SPC_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above > AVCOL_SPC_SMPTE240M =7, > AVCOL_SPC_NB , ///< Not part of ABI >}; > >enum AVColorRange{ > AVCOL_RANGE_UNSPECIFIED=0, > AVCOL_RANGE_MPEG =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges > AVCOL_RANGE_JPEG =2, ///< the normal 2^n-1 "JPEG" YUV ranges > AVCOL_RANGE_NB , ///< Not part of ABI >}; > >/** > * X X 3 4 X X are luma samples, > * 1 2 1-6 are possible chroma positions > * X X 5 6 X 0 is undefined/unknown position > */ >enum AVChromaLocation{ > AVCHROMA_LOC_UNSPECIFIED=0, > AVCHROMA_LOC_LEFT =1, ///< mpeg2/4, h264 default > AVCHROMA_LOC_CENTER =2, ///< mpeg1, jpeg, h263 > AVCHROMA_LOC_TOPLEFT =3, ///< DV > AVCHROMA_LOC_TOP =4, > AVCHROMA_LOC_BOTTOMLEFT =5, > AVCHROMA_LOC_BOTTOM =6, > AVCHROMA_LOC_NB , ///< Not part of ABI >}; > >#if FF_API_FLAC_GLOBAL_OPTS >/** > * LPC analysis type > */ >attribute_deprecated enum AVLPCType { > AV_LPC_TYPE_DEFAULT = -1, ///< use the codec default LPC type > AV_LPC_TYPE_NONE = 0, ///< do not use LPC prediction or use all zero coefficients > AV_LPC_TYPE_FIXED = 1, ///< fixed LPC coefficients > AV_LPC_TYPE_LEVINSON = 2, ///< Levinson-Durbin recursion > AV_LPC_TYPE_CHOLESKY = 3, ///< Cholesky factorization > AV_LPC_TYPE_NB , ///< Not part of ABI >}; >#endif > >enum AVAudioServiceType { > AV_AUDIO_SERVICE_TYPE_MAIN = 0, > AV_AUDIO_SERVICE_TYPE_EFFECTS = 1, > AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2, > AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3, > AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4, > AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5, > AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6, > AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7, > AV_AUDIO_SERVICE_TYPE_KARAOKE = 8, > AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI >}; > >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. >#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 */ >#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 >#define CODEC_FLAG2_MBTREE 0x00040000 ///< Use macroblock tree ratecontrol (x264 only) >#define CODEC_FLAG2_PSY 0x00080000 ///< Use psycho visual optimizations. >#define CODEC_FLAG2_SSIM 0x00100000 ///< Compute SSIM during encoding, error[] values are undefined. >#define CODEC_FLAG2_INTRA_REFRESH 0x00200000 ///< Use periodic insertion of intra blocks instead of keyframes. > >/* 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 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 >/* 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 >/** > * Codec can export data for HW decoding (VDPAU). > */ >#define CODEC_CAP_HWACCEL_VDPAU 0x0080 >/** > * Codec can output multiple frames per AVPacket > * Normally demuxers return one frame at a time, demuxers which do not do > * are connected to a parser to split what they return into proper frames. > * This flag is reserved to the very rare category of codecs which have a > * bitstream that cannot be split into frames without timeconsuming > * operations like full decoding. Demuxers carring such bitstreams thus > * may return multiple frames in a packet. This has many disadvantages like > * prohibiting stream copy in many cases thus it should only be considered > * as a last resort. > */ >#define CODEC_CAP_SUBFRAMES 0x0100 >/** > * Codec is experimental and is thus avoided in favor of non experimental > * encoders > */ >#define CODEC_CAP_EXPERIMENTAL 0x0200 >/** > * Codec should fill in channel configuration and samplerate instead of container > */ >#define CODEC_CAP_CHANNEL_CONF 0x0400 > >/** > * Codec is able to deal with negative linesizes > */ >#define CODEC_CAP_NEG_LINESIZES 0x0800 > >/** > * Codec supports frame-level multithreading. > */ >#define CODEC_CAP_FRAME_THREADS 0x1000 >/** > * Codec supports slice-based (or partition-based) multithreading. > */ >#define CODEC_CAP_SLICE_THREADS 0x2000 >/** > * Codec is lossless. > */ >#define CODEC_CAP_LOSSLESS 0x80000000 > >//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.\ > */\ > enum AVPictureType 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.\ > * Set to 4 for delayed, non-reference frames.\ > * - 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 reference frame index\ > * the order in which these are stored can depend on the codec.\ > * - encoding: Set by user.\ > * - decoding: Set by libavcodec.\ > */\ > int8_t *ref_index[2];\ >\ > /**\ > * reordered opaque 64bit (generally an integer or a double precision float\ > * PTS but can be anything). \ > * The user sets AVCodecContext.reordered_opaque to represent the input at\ > * that time,\ > * the decoder reorders values as needed and sets AVFrame.reordered_opaque\ > * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque \ > * @deprecated in favor of pkt_pts\ > * - encoding: unused\ > * - decoding: Read by user.\ > */\ > int64_t reordered_opaque;\ >\ > /**\ > * hardware accelerator private data (FFmpeg allocated)\ > * - encoding: unused\ > * - decoding: Set by libavcodec\ > */\ > void *hwaccel_picture_private;\ >\ > /**\ > * reordered pts from the last AVPacket that has been input into the decoder\ > * - encoding: unused\ > * - decoding: Read by user.\ > */\ > int64_t pkt_pts;\ >\ > /**\ > * dts from the last AVPacket that has been input into the decoder\ > * - encoding: unused\ > * - decoding: Read by user.\ > */\ > int64_t pkt_dts;\ >\ > /**\ > * the AVCodecContext which ff_thread_get_buffer() was last called on\ > * - encoding: Set by libavcodec.\ > * - decoding: Set by libavcodec.\ > */\ > struct AVCodecContext *owner;\ >\ > /**\ > * used by multithreading to store frame-specific info\ > * - encoding: Set by libavcodec.\ > * - decoding: Set by libavcodec.\ > */\ > void *thread_opaque;\ >\ > /**\ > * frame timestamp estimated using various heuristics, in stream time base\ > * - encoding: unused\ > * - decoding: set by libavcodec, read by user.\ > */\ > int64_t best_effort_timestamp;\ >\ > /**\ > * reordered pos from the last AVPacket that has been input into the decoder\ > * - encoding: unused\ > * - decoding: Read by user.\ > */\ > int64_t pkt_pos;\ >\ > /**\ > * reordered sample aspect ratio for the video frame, 0/1 if unknown\unspecified > * - encoding: unused\ > * - decoding: Read by user.\ > */\ > AVRational sample_aspect_ratio;\ >\ > /**\ > * width and height of the video frame\ > * - encoding: unused\ > * - decoding: Read by user.\ > */\ > int width, height;\ >\ > /**\ > * format of the frame, -1 if unknown or unset\ > * It should be cast to the corresponding enum (enum PixelFormat\ > * for video, enum AVSampleFormat for audio)\ > * - encoding: unused\ > * - decoding: Read by user.\ > */\ > int format;\ > > >#define FF_QSCALE_TYPE_MPEG1 0 >#define FF_QSCALE_TYPE_MPEG2 1 >#define FF_QSCALE_TYPE_H264 2 >#define FF_QSCALE_TYPE_VP56 3 > >#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. > >#if FF_API_OLD_FF_PICT_TYPES >/* DEPRECATED, directly use the AV_PICTURE_TYPE_* enum values */ >#define FF_I_TYPE AV_PICTURE_TYPE_I ///< Intra >#define FF_P_TYPE AV_PICTURE_TYPE_P ///< Predicted >#define FF_B_TYPE AV_PICTURE_TYPE_B ///< Bi-dir predicted >#define FF_S_TYPE AV_PICTURE_TYPE_S ///< S(GMC)-VOP MPEG4 >#define FF_SI_TYPE AV_PICTURE_TYPE_SI ///< Switching Intra >#define FF_SP_TYPE AV_PICTURE_TYPE_SP ///< Switching Predicted >#define FF_BI_TYPE AV_PICTURE_TYPE_BI >#endif > >#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). > >enum AVPacketSideDataType { > AV_PKT_DATA_PALETTE, >}; > >typedef struct AVPacket { > /** > * Presentation timestamp in AVStream->time_base units; the time at which > * the decompressed packet will be presented to the user. > * Can be AV_NOPTS_VALUE if it is not stored in the file. > * pts MUST be larger or equal to dts as presentation cannot happen before > * decompression, unless one wants to view hex dumps. Some formats misuse > * the terms dts and pts/cts to mean something different. Such timestamps > * must be converted to true pts/dts before they are stored in AVPacket. > */ > int64_t pts; > /** > * Decompression timestamp in AVStream->time_base units; the time at which > * the packet is decompressed. > * Can be AV_NOPTS_VALUE if it is not stored in the file. > */ > int64_t dts; > uint8_t *data; > int size; > int stream_index; > int flags; > /** > * Additional packet data that can be provided by the container. > * Packet can contain several types of side information. > */ > struct { > uint8_t *data; > int size; > enum AVPacketSideDataType type; > } *side_data; > int side_data_elems; > > /** > * Duration of this packet in AVStream->time_base units, 0 if unknown. > * Equals next_pts - this_pts in presentation order. > */ > int duration; > void (*destruct)(struct AVPacket *); > void *priv; > int64_t pos; ///< byte position in stream, -1 if unknown > > /** > * Time difference in AVStream->time_base units from the pts of this > * packet to the point at which the output from the decoder has converged > * independent from the availability of previous frames. That is, the > * frames are virtually identical no matter if decoding started from > * the very first frame or from this keyframe. > * Is AV_NOPTS_VALUE if unknown. > * This field is not the display duration of the current packet. > * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY > * set. > * > * The purpose of this field is to allow seeking in streams that have no > * keyframes in the conventional sense. It corresponds to the > * recovery point SEI in H.264 and match_time_delta in NUT. It is also > * essential for some types of subtitle streams to ensure that all > * subtitles are correctly displayed after seeking. > */ > int64_t convergence_duration; >} AVPacket; >#define AV_PKT_FLAG_KEY 0x0001 > >/** > * 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; > >/** > * 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. > * May be set by the demuxer if known from headers. > * May be overriden by the decoder if it knows better. > * - encoding: Set by user. > * - decoding: Set by user if known, overridden by libavcodec if known > */ > enum PixelFormat pix_fmt; > > /** > * 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. > * When multithreading is used, it may be called from multiple threads > * at the same time; threads might draw different parts of the same AVFrame, > * or multiple AVFrames, and there is no guarantee that slices will be drawn > * in order. > * The function is also used by hardware acceleration APIs. > * It is called at least once during frame decoding to pass > * the data needed for hardware render. > * In that mode instead of pixel data, AVFrame points to > * a structure specific to the acceleration API. The application > * reads the structure and can change some fields to indicate progress > * or mark state. > * - 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 AVSampleFormat sample_fmt; ///< sample format > > /* 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 > > /** > * 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 > * 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_factor; > > /** obsolete FIXME remove */ > int rc_strategy; >#define FF_RC_STRATEGY_XVID 1 > > int b_frame_strategy; > > struct AVCodec *codec; > > void *priv_data; > > 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 AVMediaType codec_type; /* see AVMEDIA_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_TRUNCATED 16384 >//#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: Set by user. > * Setting this to STRICT or higher means the encoder and decoder will > * generally do stupid things, whereas setting it to unofficial or lower > * will mean the encoder might produce output that is not supported by all > * spec-compliant decoders. Decoders don't differentiate between normal, > * unofficial and experimental (that is, they always try to decode things > * when they can) unless they are explicitly asked to behave stupidly > * (=strictly conform to the specs) > */ > int strict_std_compliance; >#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an 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_UNOFFICIAL -1 ///< Allow unofficial extensions >#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things. > > /** > * qscale offset between IP and B-frames > * - encoding: Set by user. > * - decoding: unused > */ > float b_quant_offset; > > /** > * Error recognization; 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_recognition; >#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_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. > * if CODEC_CAP_DR1 is not set then get_buffer() must call > * avcodec_default_get_buffer() instead of providing buffers allocated by > * some other means. > * If frame multithreading is used and thread_safe_callbacks is set, > * it may be called from a different thread, but not from more than one at once. > * Does not need to be reentrant. > * - 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. > * May be called from a different thread if frame multithreading is used, > * but not by more than one thread at once, so does not need to be reentrant. > * - encoding: unused > * - decoding: Set by libavcodec, user can override. > */ > void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic); > > /** > * Size of the frame reordering buffer in the decoder. > * For MPEG-2 it is 1 IPB or 0 low delay IP. > * - 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; > > /** > * 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 >#define FF_IDCT_EA 21 >#define FF_IDCT_SIMPLENEON 22 >#define FF_IDCT_SIMPLEALPHA 23 >#define FF_IDCT_BINK 24 > > /** > * 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; > > /** > * bits per sample/pixel from the demuxer (needed for huffyuv). > * - encoding: Set by libavcodec. > * - decoding: Set by user. > */ > int bits_per_coded_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) > * That is the width of a pixel divided by the height of the pixel. > * 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 >#define FF_DEBUG_BUFFERS 0x00008000 >#define FF_DEBUG_THREADS 0x00010000 > > /** > * 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]; > > /** > * 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; > > /** > * 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; > >#if FF_API_PALETTE_CONTROL > /** > * palette control structure > * - encoding: ??? (no palette-enabled encoder yet) > * - decoding: Set by user. > */ > struct AVPaletteControl *palctrl; >#endif > > /** > * 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(). > * if CODEC_CAP_DR1 is not set then reget_buffer() must call > * avcodec_default_reget_buffer() instead of providing buffers allocated by > * some other means. > * - 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; > >#if FF_API_ANTIALIAS_ALGO > /** > * MP3 antialias algorithm, see FF_AA_* below. > * - encoding: unused > * - decoding: Set by user. > */ > attribute_deprecated 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 >#endif > > /** > * 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, int size); > > /** > * 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_RESERVED -100 > >#define FF_PROFILE_AAC_MAIN 0 >#define FF_PROFILE_AAC_LOW 1 >#define FF_PROFILE_AAC_SSR 2 >#define FF_PROFILE_AAC_LTP 3 > >#define FF_PROFILE_DTS 20 >#define FF_PROFILE_DTS_ES 30 >#define FF_PROFILE_DTS_96_24 40 >#define FF_PROFILE_DTS_HD_HRA 50 >#define FF_PROFILE_DTS_HD_MA 60 > >#define FF_PROFILE_MPEG2_422 0 >#define FF_PROFILE_MPEG2_HIGH 1 >#define FF_PROFILE_MPEG2_SS 2 >#define FF_PROFILE_MPEG2_SNR_SCALABLE 3 >#define FF_PROFILE_MPEG2_MAIN 4 >#define FF_PROFILE_MPEG2_SIMPLE 5 > >#define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag >#define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag > >#define FF_PROFILE_H264_BASELINE 66 >#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED) >#define FF_PROFILE_H264_MAIN 77 >#define FF_PROFILE_H264_EXTENDED 88 >#define FF_PROFILE_H264_HIGH 100 >#define FF_PROFILE_H264_HIGH_10 110 >#define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA) >#define FF_PROFILE_H264_HIGH_422 122 >#define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA) >#define FF_PROFILE_H264_HIGH_444 144 >#define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244 >#define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA) >#define FF_PROFILE_H264_CAVLC_444 44 > >#define FF_PROFILE_VC1_SIMPLE 0 >#define FF_PROFILE_VC1_MAIN 1 >#define FF_PROFILE_VC1_COMPLEX 2 >#define FF_PROFILE_VC1_ADVANCED 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: Set by lavc. > */ > 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), 3 (auto) > * - 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 > > /** > * - encoding: Set by user. > * - decoding: unused > */ > int min_prediction_order; > > /** > * - encoding: Set by user. > * - decoding: unused > */ > int max_prediction_order; > >#if FF_API_FLAC_GLOBAL_OPTS > /** > * @name FLAC options > * @deprecated Use FLAC encoder private options instead. > * @{ > */ > > /** > * LPC coefficient precision - used by FLAC encoder > * - encoding: Set by user. > * - decoding: unused > */ > attribute_deprecated int lpc_coeff_precision; > > /** > * search method for selecting prediction order > * - encoding: Set by user. > * - decoding: unused > */ > attribute_deprecated int prediction_order_method; > > /** > * - encoding: Set by user. > * - decoding: unused > */ > attribute_deprecated int min_partition_order; > > /** > * - encoding: Set by user. > * - decoding: unused > */ > attribute_deprecated int max_partition_order; > /** > * @} > */ >#endif > > /** > * GOP timecode frame start number, in non drop frame format > * - encoding: Set by user. > * - decoding: unused > */ > int64_t timecode_frame_start; > >#if FF_API_REQUEST_CHANNELS > /** > * Decoder should decode to this many channels if it can (0 for default) > * - encoding: unused > * - decoding: Set by user. > * @deprecated Deprecated in favor of request_channel_layout. > */ > int request_channels; >#endif > > /** > * 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; > > /** > * opaque 64bit number (generally a PTS) that will be reordered and > * output in AVFrame.reordered_opaque > * @deprecated in favor of pkt_pts > * - encoding: unused > * - decoding: Set by user. > */ > int64_t reordered_opaque; > > /** > * Bits per sample/pixel of internal libavcodec pixel/sample format. > * - encoding: set by user. > * - decoding: set by libavcodec. > */ > int bits_per_raw_sample; > > /** > * Audio channel layout. > * - encoding: set by user. > * - decoding: set by user, may be overwritten by libavcodec. > */ > int64_t channel_layout; > > /** > * Request decoder to use this channel layout if it can (0 for default) > * - encoding: unused > * - decoding: Set by user. > */ > int64_t request_channel_layout; > > /** > * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow. > * - encoding: Set by user. > * - decoding: unused. > */ > float rc_max_available_vbv_use; > > /** > * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow. > * - encoding: Set by user. > * - decoding: unused. > */ > float rc_min_vbv_overflow_use; > > /** > * Hardware accelerator in use > * - encoding: unused. > * - decoding: Set by libavcodec > */ > struct AVHWAccel *hwaccel; > > /** > * For some codecs, the time base is closer to the field rate than the frame rate. > * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration > * if no telecine is used ... > * > * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2. > */ > int ticks_per_frame; > > /** > * 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 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 > */ > void *hwaccel_context; > > /** > * Chromaticity coordinates of the source primaries. > * - encoding: Set by user > * - decoding: Set by libavcodec > */ > enum AVColorPrimaries color_primaries; > > /** > * Color Transfer Characteristic. > * - encoding: Set by user > * - decoding: Set by libavcodec > */ > enum AVColorTransferCharacteristic color_trc; > > /** > * YUV colorspace type. > * - encoding: Set by user > * - decoding: Set by libavcodec > */ > enum AVColorSpace colorspace; > > /** > * MPEG vs JPEG YUV range. > * - encoding: Set by user > * - decoding: Set by libavcodec > */ > enum AVColorRange color_range; > > /** > * This defines the location of chroma samples. > * - encoding: Set by user > * - decoding: Set by libavcodec > */ > enum AVChromaLocation chroma_sample_location; > > /** > * 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. > * Also see avcodec_thread_init and e.g. the --enable-pthread configure option. > * @param c context passed also to func > * @param count the number of things to execute > * @param arg2 argument passed unchanged to func > * @param ret return values of executed functions, must have space for "count" values. May be NULL. > * @param func function that will be called count times, with jobnr from 0 to count-1. > * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no > * two instances of func executing at the same time will have the same threadnr. > * @return always 0 currently, but code should handle a future improvement where when any call to func > * returns < 0 no further calls to func may be done and < 0 is returned. > * - encoding: Set by libavcodec, user can override. > * - decoding: Set by libavcodec, user can override. > */ > int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count); > > /** > * explicit P-frame weighted prediction analysis method > * 0: off > * 1: fast blind weighting (one reference duplicate with -1 offset) > * 2: smart weighting (full fade detection analysis) > * - encoding: Set by user. > * - decoding: unused > */ > int weighted_p_pred; > > /** > * AQ mode > * 0: Disabled > * 1: Variance AQ (complexity mask) > * 2: Auto-variance AQ (experimental) > * - encoding: Set by user > * - decoding: unused > */ > int aq_mode; > > /** > * AQ strength > * Reduces blocking and blurring in flat and textured areas. > * - encoding: Set by user > * - decoding: unused > */ > float aq_strength; > > /** > * PSY RD > * Strength of psychovisual optimization > * - encoding: Set by user > * - decoding: unused > */ > float psy_rd; > > /** > * PSY trellis > * Strength of psychovisual optimization > * - encoding: Set by user > * - decoding: unused > */ > float psy_trellis; > > /** > * RC lookahead > * Number of frames for frametype and ratecontrol lookahead > * - encoding: Set by user > * - decoding: unused > */ > int rc_lookahead; > > /** > * Constant rate factor maximum > * With CRF encoding mode and VBV restrictions enabled, prevents quality from being worse > * than crf_max, even if doing so would violate VBV restrictions. > * - encoding: Set by user. > * - decoding: unused > */ > float crf_max; > > int log_level_offset; > >#if FF_API_FLAC_GLOBAL_OPTS > /** > * Determines which LPC analysis algorithm to use. > * - encoding: Set by user > * - decoding: unused > */ > attribute_deprecated enum AVLPCType lpc_type; > > /** > * Number of passes to use for Cholesky factorization during LPC analysis > * - encoding: Set by user > * - decoding: unused > */ > attribute_deprecated int lpc_passes; >#endif > > /** > * Number of slices. > * Indicates number of picture subdivisions. Used for parallelized > * decoding. > * - encoding: Set by user > * - decoding: unused > */ > int slices; > > /** > * Header containing style information for text subtitles. > * For SUBTITLE_ASS subtitle type, it should contain the whole ASS > * [Script Info] and [V4+ Styles] section, plus the [Events] line and > * the Format line following. It shouldn't include any Dialogue line. > * - encoding: Set/allocated/freed by user (before avcodec_open()) > * - decoding: Set/allocated/freed by libavcodec (by avcodec_open()) > */ > uint8_t *subtitle_header; > int subtitle_header_size; > > /** > * Current packet as passed into the decoder, to avoid having > * to pass the packet into every function. Currently only valid > * inside lavc and get/release_buffer callbacks. > * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts > * - encoding: unused > */ > AVPacket *pkt; > > /** > * Whether this is a copy of the context which had init() called on it. > * This is used by multithreading - shared tables and picture pointers > * should be freed from the original context only. > * - encoding: Set by libavcodec. > * - decoding: Set by libavcodec. > */ > int is_copy; > > /** > * Which multithreading methods to use. > * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread, > * so clients which cannot provide future frames should not use it. > * > * - encoding: Set by user, otherwise the default is used. > * - decoding: Set by user, otherwise the default is used. > */ > int thread_type; >#define FF_THREAD_FRAME 1 //< Decode more than one frame at once >#define FF_THREAD_SLICE 2 //< Decode more than one part of a single frame at once > > /** > * Which multithreading methods are in use by the codec. > * - encoding: Set by libavcodec. > * - decoding: Set by libavcodec. > */ > int active_thread_type; > > /** > * Set by the client if its custom get_buffer() callback can be called > * from another thread, which allows faster multithreaded decoding. > * draw_horiz_band() will be called from other threads regardless of this setting. > * Ignored if the default get_buffer() is used. > * - encoding: Set by user. > * - decoding: Set by user. > */ > int thread_safe_callbacks; > > /** > * VBV delay coded in the last frame (in periods of a 27 MHz clock). > * Used for compliant TS muxing. > * - encoding: Set by libavcodec. > * - decoding: unused. > */ > uint64_t vbv_delay; > > /** > * Type of service that the audio stream conveys. > * - encoding: Set by user. > * - decoding: Set by libavcodec. > */ > enum AVAudioServiceType audio_service_type; > > /** > * desired sample format > * - encoding: Not used. > * - decoding: Set by user. > * Decoder will decode to this format if it can. > */ > enum AVSampleFormat request_sample_fmt; > > /** > * 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 > > >} AVCodecContext; > >/** > * AVProfile. > */ >typedef struct AVProfile { > int profile; > const char *name; ///< short name for the profile >} AVProfile; > >/** > * 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 AVMediaType 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, AVPacket *avpkt); > /** > * 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 name. > * You 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 > const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1 > const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0 > 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} > > /** > * @name Frame-level threading support functions > * @{ > */ > /** > * If defined, called on thread contexts when they are created. > * If the codec allocates writable tables in init(), re-allocate them here. > * priv_data will be set to a copy of the original. > */ > int (*init_thread_copy)(AVCodecContext *); > /** > * Copy necessary context variables from a previous thread context to the current one. > * If not defined, the next thread will start automatically; otherwise, the codec > * must call ff_thread_finish_setup(). > * > * dst and src will (rarely) point to the same context, in which case memcpy should be skipped. > */ > int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src); > /** @} */ >} AVCodec; > >/** > * AVHWAccel. > */ >typedef struct AVHWAccel { > /** > * Name of the hardware accelerated codec. > * The name is globally unique among encoders and among decoders (but an > * encoder and a decoder can share the same name). > */ > const char *name; > > /** > * Type of codec implemented by the hardware accelerator. > * > * See AVMEDIA_TYPE_xxx > */ > enum AVMediaType type; > > /** > * Codec implemented by the hardware accelerator. > * > * See CODEC_ID_xxx > */ > enum CodecID id; > > /** > * Supported pixel format. > * > * Only hardware accelerated formats are supported here. > */ > enum PixelFormat pix_fmt; > > /** > * Hardware accelerated codec capabilities. > * see FF_HWACCEL_CODEC_CAP_* > */ > int capabilities; > > struct AVHWAccel *next; > > /** > * Called at the beginning of each frame or field picture. > * > * Meaningful frame information (codec specific) is guaranteed to > * be parsed at this point. This function is mandatory. > * > * Note that buf can be NULL along with buf_size set to 0. > * Otherwise, this means the whole frame is available at this point. > * > * @param avctx the codec context > * @param buf the frame data buffer base > * @param buf_size the size of the frame in bytes > * @return zero if successful, a negative value otherwise > */ > int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); > > /** > * Callback for each slice. > * > * Meaningful slice information (codec specific) is guaranteed to > * be parsed at this point. This function is mandatory. > * > * @param avctx the codec context > * @param buf the slice data buffer base > * @param buf_size the size of the slice in bytes > * @return zero if successful, a negative value otherwise > */ > int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); > > /** > * Called at the end of each frame or field picture. > * > * The whole picture is parsed at this point and can now be sent > * to the hardware accelerator. This function is mandatory. > * > * @param avctx the codec context > * @return zero if successful, a negative value otherwise > */ > int (*end_frame)(AVCodecContext *avctx); > > /** > * Size of HW accelerator private data. > * > * Private data is allocated with av_mallocz() before > * AVCodecContext.get_buffer() and deallocated after > * AVCodecContext.release_buffer(). > */ > int priv_data_size; >} AVHWAccel; > >/** > * 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; > >#if FF_API_PALETTE_CONTROL >/** > * 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; >#endif > >enum AVSubtitleType { > SUBTITLE_NONE, > > SUBTITLE_BITMAP, ///< A bitmap, pict will be set > > /** > * Plain text, the text field must be set by the decoder and is > * authoritative. ass and pict fields may contain approximations. > */ > SUBTITLE_TEXT, > > /** > * Formatted text, the ass field must be set by the decoder and is > * authoritative. pict and text fields may contain approximations. > */ > SUBTITLE_ASS, >}; > >typedef struct AVSubtitleRect { > int x; ///< top left corner of pict, undefined when pict is not set > int y; ///< top left corner of pict, undefined when pict is not set > int w; ///< width of pict, undefined when pict is not set > int h; ///< height of pict, undefined when pict is not set > int nb_colors; ///< number of colors in pict, undefined when pict is not set > > /** > * data+linesize for the bitmap of this subtitle. > * can be set for text/ass as well once they where rendered > */ > AVPicture pict; > enum AVSubtitleType type; > > char *text; ///< 0 terminated plain UTF-8 text > > /** > * 0 terminated ASS/SSA compatible event line. > * The pressentation of this is unaffected by the other values in this > * struct. > */ > char *ass; >} 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 */ > unsigned num_rects; > AVSubtitleRect **rects; > int64_t pts; ///< Same as packet pts, in AV_TIME_BASE >} AVSubtitle; > >/* packet functions */ > >/** > * @deprecated use NULL instead > */ >attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt); > >/** > * Default packet destructor. > */ >void av_destruct_packet(AVPacket *pkt); > >/** > * Initialize optional fields of a packet with default values. > * > * @param pkt packet > */ >void av_init_packet(AVPacket *pkt); > >/** > * Allocate the payload of a packet and initialize its fields with > * default values. > * > * @param pkt packet > * @param size wanted payload size > * @return 0 if OK, AVERROR_xxx otherwise > */ >int av_new_packet(AVPacket *pkt, int size); > >/** > * Reduce packet size, correctly zeroing padding > * > * @param pkt packet > * @param size new size > */ >void av_shrink_packet(AVPacket *pkt, int size); > >/** > * Increase packet size, correctly zeroing padding > * > * @param pkt packet > * @param grow_by number of bytes by which to increase the size of the packet > */ >int av_grow_packet(AVPacket *pkt, int grow_by); > >/** > * @warning This is a hack - the packet memory allocation stuff is broken. The > * packet is allocated if it was not really allocated. > */ >int av_dup_packet(AVPacket *pkt); > >/** > * Free a packet. > * > * @param pkt packet to free > */ >void av_free_packet(AVPacket *pkt); > >/** > * Allocate new information of a packet. > * > * @param pkt packet > * @param type side information type > * @param size side information size > * @return pointer to fresh allocated data or NULL otherwise > */ >uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, > int size); > >/** > * Get side information from packet. > * > * @param pkt packet > * @param type desired side information type > * @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, > int *size); > >int av_packet_merge_side_data(AVPacket *pkt); > >int av_packet_split_side_data(AVPacket *pkt); > > >/* resample.c */ > >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 occured > */ >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); > >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() > */ >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 > */ >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 > */ >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 > */ >void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance); >void av_resample_close(struct AVResampleContext *c); > >/** > * Allocate memory for a picture. Call avpicture_free() to free it. > * > * \see avpicture_fill() > * > * @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, enum PixelFormat pix_fmt, int width, int height); > >/** > * Free a picture previously allocated by avpicture_alloc(). > * The data buffer used by the AVPicture is freed, but the AVPicture structure > * itself is not. > * > * @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. > * Call with ptr == NULL to get the required size for the ptr buffer. > * > * To allocate the buffer and fill in the AVPicture fields in one call, > * use avpicture_alloc(). > * > * @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, > enum PixelFormat pix_fmt, int width, int height); > >/** > * Copy pixel data from an AVPicture into a buffer. > * The data is stored compactly, without any gaps for alignment or padding > * which may be applied by avpicture_fill(). > * > * \see avpicture_get_size() > * > * @param[in] src AVPicture containing image data > * @param[in] pix_fmt The format in which the picture data is stored. > * @param[in] width the width of the image in pixels. > * @param[in] height the height of the image in pixels. > * @param[out] dest A buffer into which picture data will be copied. > * @param[in] dest_size The size of 'dest'. > * @return The number of bytes written to dest, or a negative value (error code) on error. > */ >int avpicture_layout(const AVPicture* src, enum PixelFormat 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. > * Note that this returns the size of a compact representation as generated > * by avpicture_layout(), which can be smaller than the size required for e.g. > * avpicture_fill(). > * > * @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 or -1 on error (e.g. too large dimensions). > */ >int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height); >void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift); > >#if FF_API_GET_PIX_FMT_NAME >/** > * Return the short name for a pixel format. > * > * \see av_get_pix_fmt(), av_get_pix_fmt_string(). > * @deprecated Deprecated in favor of av_get_pix_fmt_name(). > */ >attribute_deprecated >const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt); >#endif > >void avcodec_set_dimensions(AVCodecContext *s, int width, int height); > >/** > * Return a value representing the fourCC code associated to the > * pixel format pix_fmt, or 0 if no associated fourCC code can be > * found. > */ >unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt); > >/** > * Put a string representing the codec tag codec_tag in buf. > * > * @param buf_size size in bytes of buf > * @return the length of the string that would have been generated if > * enough space had been available, excluding the trailing null > */ >size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag); > >#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. > */ >int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt, > int has_alpha); > >/** > * Find 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 > * 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. > */ >enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt, > int has_alpha, int *loss_ptr); > >#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, > enum PixelFormat pix_fmt, int width, int height); > >/* deinterlace a picture */ >/* deinterlace - if not supported return -1 */ >int avpicture_deinterlace(AVPicture *dst, const AVPicture *src, > enum PixelFormat pix_fmt, int width, int height); > >/* external high level API */ > >/** > * If c is NULL, returns the first registered codec, > * if c is non-NULL, returns the next registered codec after c, > * or NULL if c is the last one. > */ >AVCodec *av_codec_next(AVCodec *c); > >/** > * Return the LIBAVCODEC_VERSION_INT constant. > */ >unsigned avcodec_version(void); > >/** > * Return the libavcodec build-time configuration. > */ >const char *avcodec_configuration(void); > >/** > * Return the libavcodec license. > */ >const char *avcodec_license(void); > >/** > * Initialize libavcodec. > * If called more than once, does nothing. > * > * @warning This function must be called before any other libavcodec > * function. > * > * @warning This function is not thread-safe. > */ >void avcodec_init(void); > >/** > * Register the codec codec and initialize libavcodec. > * > * @see avcodec_init(), avcodec_register_all() > */ >void avcodec_register(AVCodec *codec); > >/** > * Find 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); > >/** > * Find 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); > >/** > * Find 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); > >/** > * Find 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); > >/** > * Return a name for the specified profile, if available. > * > * @param codec the codec that is searched for the given profile > * @param profile the profile value for which a name is requested > * @return A name for the profile if found, NULL otherwise. > */ >const char *av_get_profile_name(const AVCodec *codec, int profile); > >/** > * Set 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 AVMediaType); > >/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API! > * we WILL change its arguments and name a few times! */ >int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec); > >/** > * Allocate an AVCodecContext and set 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 AVMediaType); > >/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API! > * we WILL change its arguments and name a few times! */ >AVCodecContext *avcodec_alloc_context3(AVCodec *codec); > >/** > * Copy the settings of the source AVCodecContext into the destination > * AVCodecContext. The resulting destination codec context will be > * unopened, i.e. you are required to call avcodec_open() before you > * can use this AVCodecContext to decode/encode video/audio data. > * > * @param dest target codec context, should be initialized with > * avcodec_alloc_context(), but otherwise uninitialized > * @param src source codec context > * @return AVERROR() on error (e.g. memory allocation error), 0 on success > */ >int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src); > >/** > * Set 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); > >/** > * Allocate an AVFrame and set 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); > >/** > * Return the amount of padding in pixels which the get_buffer callback must > * provide around the edge of the image for codecs which do not have the > * CODEC_FLAG_EMU_EDGE flag. > * > * @return Required padding in pixels. > */ >unsigned avcodec_get_edge_width(void); >/** > * Modify width and height values so that they will result in a memory > * buffer that is acceptable for the codec if you do not use any horizontal > * padding. > * > * May only be used if a codec with CODEC_CAP_DR1 has been opened. > * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased > * according to avcodec_get_edge_width() before. > */ >void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height); >/** > * Modify width and height values so that they will result in a memory > * buffer that is acceptable for the codec if you also ensure that all > * line sizes are a multiple of the respective linesize_align[i]. > * > * May only be used if a codec with CODEC_CAP_DR1 has been opened. > * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased > * according to avcodec_get_edge_width() before. > */ >void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, > int linesize_align[4]); > >enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt); > >#if FF_API_THREAD_INIT >/** > * @deprecated Set s->thread_count before calling avcodec_open() instead of calling this. > */ >attribute_deprecated >int avcodec_thread_init(AVCodecContext *s, int thread_count); >#endif > >int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size); >int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count); >//FIXME func typedef > >#if FF_API_AVCODEC_OPEN >/** > * Initialize 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, avcodec_close > * > * @deprecated use avcodec_open2 > */ >int avcodec_open(AVCodecContext *avctx, AVCodec *codec); >#endif > >/** > * Initialize the AVCodecContext to use the given AVCodec. Prior to using this > * function the context has to be allocated with avcodec_alloc_context(). > * > * 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(); > * av_dict_set(&opts, "b", "2.5M", 0); > * codec = avcodec_find_decoder(CODEC_ID_H264); > * if (!codec) > * exit(1); > * > * context = avcodec_alloc_context(); > * > * if (avcodec_open(context, codec, opts) < 0) > * exit(1); > * @endcode > * > * @param avctx The context to initialize. > * @param options A dictionary filled with AVCodecContext and codec-private options. > * On return this object will be filled with options that were not found. > * > * @return zero on success, a negative value on error > * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(), > * av_dict_set(), av_opt_find(). > */ >int avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options); > >/** > * Decode the audio frame of size avpkt->size from avpkt->data into samples. > * Some decoders may support multiple frames in a single AVPacket, such > * decoders would then just decode the first frame. In this case, > * avcodec_decode_audio3 has to be called again with an AVPacket that contains > * the remaining data in order to decode the second frame etc. > * If no frame > * could be outputted, frame_size_ptr is zero. Otherwise, it is the > * decompressed frame size in bytes. > * > * @warning You must set frame_size_ptr to the allocated size of the > * output buffer before calling avcodec_decode_audio3(). > * > * @warning The input buffer must be 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 avpkt->data should be set to 0 to ensure that > * no overreading happens for damaged MPEG streams. > * > * @note You might have to align the input buffer avpkt->data and output buffer > * 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, avpkt->data should have 4 byte alignment at minimum and > * samples should be 16 byte aligned unless the CPU doesn't need it > * (AltiVec and SSE do). > * > * @param avctx the codec context > * @param[out] samples the output buffer, sample type in avctx->sample_fmt > * @param[in,out] frame_size_ptr the output buffer size in bytes > * @param[in] avpkt The input AVPacket containing the input buffer. > * You can create such packet with av_init_packet() and by then setting > * data and size, some decoders might in addition need other fields. > * All decoders are designed to use the least fields possible though. > * @return On error a negative value is returned, otherwise the number of bytes > * used or zero if no frame data was decompressed (used) from the input AVPacket. > */ >int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples, > int *frame_size_ptr, > AVPacket *avpkt); > >/** > * Decode the video frame of size avpkt->size from avpkt->data into picture. > * Some decoders may support multiple frames in a single AVPacket, such > * decoders would then just decode the first frame. > * > * @warning The input buffer must be 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 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 avpkt->data. > * 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, avpkt->data should have 4 byte alignment at minimum. > * > * @note Some codecs have a delay between input and output, these need to be > * fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames. > * > * @param avctx the codec context > * @param[out] picture The AVFrame in which the decoded video frame will be stored. > * Use avcodec_alloc_frame to get an AVFrame, the codec will > * allocate memory for the actual bitmap. > * with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit. > * with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder > * decodes and the decoder tells the user once it does not need the data anymore, > * the user app can at this point free/reuse/keep the memory as it sees fit. > * > * @param[in] avpkt The input AVpacket containing the input buffer. > * You can create such packet with av_init_packet() and by then setting > * data and size, some decoders might in addition need other fields like > * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least > * fields possible. > * @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_video2(AVCodecContext *avctx, AVFrame *picture, > int *got_picture_ptr, > AVPacket *avpkt); > >/** > * Decode a subtitle message. > * Return a negative value on 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. > * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for > * simplicity, because the performance difference is expect to be negligible > * and reusing a get_buffer written for video codecs would probably perform badly > * due to a potentially very different allocation pattern. > * > * @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[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. > */ >int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, > int *got_sub_ptr, > AVPacket *avpkt); > >/** > * Frees all allocated data in the given subtitle struct. > * > * @param sub AVSubtitle to free. > */ >void avsubtitle_free(AVSubtitle *sub); > >int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata, > int *data_size_ptr, > uint8_t *buf, int buf_size); > >/** > * Encode an audio frame from samples into buf. > * > * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large. > * However, for PCM audio the user will know how much space is needed > * because it depends on the value passed in buf_size as described > * below. In that case a lower value can be used. > * > * @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 avctx. > * For PCM audio the number of samples read from samples is equal to > * 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); > >/** > * Encode a video frame from pict into buf. > * The input picture should be > * stored using a specific format, namely 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 output 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); > >/** > * Register all the codecs, parsers and bitstream filters which were enabled at > * configuration time. If you do not call this function you can select exactly > * which formats you want to support, by using the individual registration > * functions. > * > * @see avcodec_register > * @see av_register_codec_parser > * @see av_register_bitstream_filter > */ >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 */ > >#if FF_API_OLD_FF_PICT_TYPES >/** > * Return a single letter to describe the given picture type pict_type. > * > * @param[in] pict_type the picture type > * @return A single character representing the picture type. > * @deprecated Use av_get_picture_type_char() instead. > */ >attribute_deprecated >char av_get_pict_type_char(int pict_type); >#endif > >/** > * Return 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); > >#if FF_API_OLD_SAMPLE_FMT >/** > * @deprecated Use av_get_bytes_per_sample() instead. > */ >attribute_deprecated >int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt); >#endif > >/* 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. */ > /** > * This field is used for proper frame duration computation in lavf. > * It signals, how much longer the frame duration of the current frame > * is compared to normal frame duration. > * > * frame_duration = (1 + repeat_pict) * time_base > * > * It is used by codecs like H.264 to display telecined material. > */ > 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 >#define PARSER_FLAG_ONCE 0x0002 >/// Set if the parser has a valid file offset >#define PARSER_FLAG_FETCHED_OFFSET 0x0004 > > int64_t offset; ///< byte offset from starting packet start > int64_t cur_frame_end[AV_PARSER_PTS_NB]; > > /*! > * Set by parser to 1 for key frames and 0 for non-key frames. > * It is initialized to -1, so if the parser doesn't set this flag, > * old-style fallback using AV_PICTURE_TYPE_I picture type as key frames > * will be used. > */ > int key_frame; > > /** > * Time difference in stream time base units from the pts of this > * packet to the point at which the output from the decoder has converged > * independent from the availability of previous frames. That is, the > * frames are virtually identical no matter if decoding started from > * the very first frame or from this keyframe. > * Is AV_NOPTS_VALUE if unknown. > * This field is not the display duration of the current frame. > * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY > * set. > * > * The purpose of this field is to allow seeking in streams that have no > * keyframes in the conventional sense. It corresponds to the > * recovery point SEI in H.264 and match_time_delta in NUT. It is also > * essential for some types of subtitle streams to ensure that all > * subtitles are correctly displayed after seeking. > */ > int64_t convergence_duration; > > // Timestamp generation support: > /** > * Synchronization point for start of timestamp generation. > * > * Set to >0 for sync point, 0 for no sync point and <0 for undefined > * (default). > * > * For example, this corresponds to presence of H.264 buffering period > * SEI message. > */ > int dts_sync_point; > > /** > * Offset of the current timestamp against last timestamp sync point in > * units of AVCodecContext.time_base. > * > * Set to INT_MIN when dts_sync_point unused. Otherwise, it must > * contain a valid timestamp offset. > * > * Note that the timestamp of sync point has usually a nonzero > * dts_ref_dts_delta, which refers to the previous sync point. Offset of > * the next frame after timestamp sync point will be usually 1. > * > * For example, this corresponds to H.264 cpb_removal_delay. > */ > int dts_ref_dts_delta; > > /** > * Presentation delay of current frame in units of AVCodecContext.time_base. > * > * Set to INT_MIN when dts_sync_point unused. Otherwise, it must > * contain valid non-negative timestamp delta (presentation time of a frame > * must not lie in the past). > * > * This delay represents the difference between decoding and presentation > * time of the frame. > * > * For example, this corresponds to H.264 dpb_output_delay. > */ > int pts_dts_delta; > > /** > * Position of the packet in file. > * > * Analogous to cur_frame_pts/dts > */ > int64_t cur_frame_pos[AV_PARSER_PTS_NB]; > > /** > * Byte position of currently parsed frame in stream. > */ > int64_t pos; > > /** > * Previous frame byte position. > */ > int64_t last_pos; >} 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; > >AVCodecParser *av_parser_next(AVCodecParser *c); > >void av_register_codec_parser(AVCodecParser *parser); >AVCodecParserContext *av_parser_init(int codec_id); > >/** > * Parse a packet. > * > * @param s parser context. > * @param avctx codec context. > * @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 pts input presentation timestamp. > * @param dts input decoding timestamp. > * @param pos input byte position in stream. > * @return the number of bytes of the input bitstream used. > * > * Example: > * @code > * while(in_len){ > * len = av_parser_parse2(myparser, AVCodecContext, &data, &size, > * in_data, in_len, > * pts, dts, pos); > * in_data += len; > * in_len -= len; > * > * if(size) > * decode_frame(data, size); > * } > * @endcode > */ >int av_parser_parse2(AVCodecParserContext *s, > AVCodecContext *avctx, > uint8_t **poutbuf, int *poutbuf_size, > const uint8_t *buf, int buf_size, > int64_t pts, int64_t dts, > int64_t pos); > >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 */ > >/** > * Reallocate the given block if it is not large enough, otherwise do nothing. > * > * @see av_realloc > */ >void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size); > >/** > * Allocate a buffer, reusing the given one if large enough. > * > * Contrary to av_fast_realloc the current buffer contents might not be > * preserved and on error the old buffer is freed, thus no special > * handling to avoid memleaks is necessary. > * > * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer > * @param size size of the buffer *ptr points to > * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and > * *size 0 if an error occurred. > */ >void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size); > >/** > * Copy image src to dst. Wraps av_picture_data_copy() above. > */ >void av_picture_copy(AVPicture *dst, const AVPicture *src, > enum PixelFormat pix_fmt, int width, int height); > >/** > * Crop image top and left side. > */ >int av_picture_crop(AVPicture *dst, const AVPicture *src, > enum PixelFormat pix_fmt, int top_band, int left_band); > >/** > * Pad image. > */ >int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt, > int padtop, int padbottom, int padleft, int padright, int *color); > >/** > * Encode extradata length to a buffer. Used by xiph codecs. > * > * @param s buffer to write to; must be at least (v/255+1) bytes long > * @param v size of extradata in bytes > * @return number of bytes written to the buffer. > */ >unsigned int av_xiphlacing(unsigned char *s, unsigned int v); > >/** > * Logs a generic warning message about a missing feature. This function is > * 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 > * @param[in] feature string containing the name of the missing feature > * @param[in] want_sample indicates if samples are wanted which exhibit this feature. > * If want_sample is non-zero, additional verbage will be added to the log > * message which tells the user how to report samples to the development > * mailing list. > */ >void av_log_missing_feature(void *avc, const char *feature, int want_sample); > >/** > * Log a generic warning message asking for a sample. This function is > * 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 > * @param[in] msg string containing an optional message, or NULL if no message > */ >void av_log_ask_for_sample(void *avc, const char *msg, ...); > >/** > * Register the hardware accelerator hwaccel. > */ >void av_register_hwaccel(AVHWAccel *hwaccel); > >/** > * If hwaccel is NULL, returns the first registered hardware accelerator, > * if hwaccel is non-NULL, returns the next registered hardware accelerator > * after hwaccel, or NULL if hwaccel is the last one. > */ >AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel); > > >/** > * Lock operation used by lockmgr > */ >enum AVLockOp { > AV_LOCK_CREATE, ///< Create a mutex > AV_LOCK_OBTAIN, ///< Lock the mutex > AV_LOCK_RELEASE, ///< Unlock the mutex > AV_LOCK_DESTROY, ///< Free mutex resources >}; > >/** > * Register a user provided lock manager supporting the operations > * specified by AVLockOp. mutex points to a (void *) where the > * lockmgr should store/get a pointer to a user allocated mutex. It's > * NULL upon AV_LOCK_CREATE and != NULL for all other ops. > * > * @param cb User defined callback. Note: FFmpeg may invoke calls to this > * callback during the call to av_lockmgr_register(). > * Thus, the application must be prepared to handle that. > * If cb is set to NULL the lockmgr will be unregistered. > * Also note that during unregistration the previously registered > * lockmgr callback may also be invoked. > */ >int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op)); > >#endif /* AVCODEC_AVCODEC_H */
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