| /* |
| * copyright (c) 2001 Fabrice Bellard |
| * |
| * This file is part of Libav. |
| * |
| * Libav is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * Libav is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with Libav; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #ifndef AVCODEC_AVCODEC_H |
| #define AVCODEC_AVCODEC_H |
| |
| /** |
| * @file |
| * @ingroup libavc |
| * Libavcodec external API header |
| */ |
| |
| #include <errno.h> |
| #include "libavutil/samplefmt.h" |
| #include "libavutil/attributes.h" |
| #include "libavutil/avutil.h" |
| #include "libavutil/buffer.h" |
| #include "libavutil/cpu.h" |
| #include "libavutil/dict.h" |
| #include "libavutil/frame.h" |
| #include "libavutil/log.h" |
| #include "libavutil/pixfmt.h" |
| #include "libavutil/rational.h" |
| |
| #include "version.h" |
| |
| #if FF_API_FAST_MALLOC |
| // to provide fast_*alloc |
| #include "libavutil/mem.h" |
| #endif |
| |
| /** |
| * @defgroup libavc Encoding/Decoding Library |
| * @{ |
| * |
| * @defgroup lavc_decoding Decoding |
| * @{ |
| * @} |
| * |
| * @defgroup lavc_encoding Encoding |
| * @{ |
| * @} |
| * |
| * @defgroup lavc_codec Codecs |
| * @{ |
| * @defgroup lavc_codec_native Native Codecs |
| * @{ |
| * @} |
| * @defgroup lavc_codec_wrappers External library wrappers |
| * @{ |
| * @} |
| * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge |
| * @{ |
| * @} |
| * @} |
| * @defgroup lavc_internal Internal |
| * @{ |
| * @} |
| * @} |
| * |
| */ |
| |
| /** |
| * @defgroup lavc_core Core functions/structures. |
| * @ingroup libavc |
| * |
| * Basic definitions, functions for querying libavcodec capabilities, |
| * allocating core structures, etc. |
| * @{ |
| */ |
| |
| |
| /** |
| * 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. |
| * |
| * After adding new codec IDs, do not forget to add an entry to the codec |
| * descriptor list and bump libavcodec minor version. |
| */ |
| enum AVCodecID { |
| AV_CODEC_ID_NONE, |
| |
| /* video codecs */ |
| AV_CODEC_ID_MPEG1VIDEO, |
| AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding |
| #if FF_API_XVMC |
| AV_CODEC_ID_MPEG2VIDEO_XVMC, |
| #endif /* FF_API_XVMC */ |
| AV_CODEC_ID_H261, |
| AV_CODEC_ID_H263, |
| AV_CODEC_ID_RV10, |
| AV_CODEC_ID_RV20, |
| AV_CODEC_ID_MJPEG, |
| AV_CODEC_ID_MJPEGB, |
| AV_CODEC_ID_LJPEG, |
| AV_CODEC_ID_SP5X, |
| AV_CODEC_ID_JPEGLS, |
| AV_CODEC_ID_MPEG4, |
| AV_CODEC_ID_RAWVIDEO, |
| AV_CODEC_ID_MSMPEG4V1, |
| AV_CODEC_ID_MSMPEG4V2, |
| AV_CODEC_ID_MSMPEG4V3, |
| AV_CODEC_ID_WMV1, |
| AV_CODEC_ID_WMV2, |
| AV_CODEC_ID_H263P, |
| AV_CODEC_ID_H263I, |
| AV_CODEC_ID_FLV1, |
| AV_CODEC_ID_SVQ1, |
| AV_CODEC_ID_SVQ3, |
| AV_CODEC_ID_DVVIDEO, |
| AV_CODEC_ID_HUFFYUV, |
| AV_CODEC_ID_CYUV, |
| AV_CODEC_ID_H264, |
| AV_CODEC_ID_INDEO3, |
| AV_CODEC_ID_VP3, |
| AV_CODEC_ID_THEORA, |
| AV_CODEC_ID_ASV1, |
| AV_CODEC_ID_ASV2, |
| AV_CODEC_ID_FFV1, |
| AV_CODEC_ID_4XM, |
| AV_CODEC_ID_VCR1, |
| AV_CODEC_ID_CLJR, |
| AV_CODEC_ID_MDEC, |
| AV_CODEC_ID_ROQ, |
| AV_CODEC_ID_INTERPLAY_VIDEO, |
| AV_CODEC_ID_XAN_WC3, |
| AV_CODEC_ID_XAN_WC4, |
| AV_CODEC_ID_RPZA, |
| AV_CODEC_ID_CINEPAK, |
| AV_CODEC_ID_WS_VQA, |
| AV_CODEC_ID_MSRLE, |
| AV_CODEC_ID_MSVIDEO1, |
| AV_CODEC_ID_IDCIN, |
| AV_CODEC_ID_8BPS, |
| AV_CODEC_ID_SMC, |
| AV_CODEC_ID_FLIC, |
| AV_CODEC_ID_TRUEMOTION1, |
| AV_CODEC_ID_VMDVIDEO, |
| AV_CODEC_ID_MSZH, |
| AV_CODEC_ID_ZLIB, |
| AV_CODEC_ID_QTRLE, |
| AV_CODEC_ID_TSCC, |
| AV_CODEC_ID_ULTI, |
| AV_CODEC_ID_QDRAW, |
| AV_CODEC_ID_VIXL, |
| AV_CODEC_ID_QPEG, |
| AV_CODEC_ID_PNG, |
| AV_CODEC_ID_PPM, |
| AV_CODEC_ID_PBM, |
| AV_CODEC_ID_PGM, |
| AV_CODEC_ID_PGMYUV, |
| AV_CODEC_ID_PAM, |
| AV_CODEC_ID_FFVHUFF, |
| AV_CODEC_ID_RV30, |
| AV_CODEC_ID_RV40, |
| AV_CODEC_ID_VC1, |
| AV_CODEC_ID_WMV3, |
| AV_CODEC_ID_LOCO, |
| AV_CODEC_ID_WNV1, |
| AV_CODEC_ID_AASC, |
| AV_CODEC_ID_INDEO2, |
| AV_CODEC_ID_FRAPS, |
| AV_CODEC_ID_TRUEMOTION2, |
| AV_CODEC_ID_BMP, |
| AV_CODEC_ID_CSCD, |
| AV_CODEC_ID_MMVIDEO, |
| AV_CODEC_ID_ZMBV, |
| AV_CODEC_ID_AVS, |
| AV_CODEC_ID_SMACKVIDEO, |
| AV_CODEC_ID_NUV, |
| AV_CODEC_ID_KMVC, |
| AV_CODEC_ID_FLASHSV, |
| AV_CODEC_ID_CAVS, |
| AV_CODEC_ID_JPEG2000, |
| AV_CODEC_ID_VMNC, |
| AV_CODEC_ID_VP5, |
| AV_CODEC_ID_VP6, |
| AV_CODEC_ID_VP6F, |
| AV_CODEC_ID_TARGA, |
| AV_CODEC_ID_DSICINVIDEO, |
| AV_CODEC_ID_TIERTEXSEQVIDEO, |
| AV_CODEC_ID_TIFF, |
| AV_CODEC_ID_GIF, |
| AV_CODEC_ID_DXA, |
| AV_CODEC_ID_DNXHD, |
| AV_CODEC_ID_THP, |
| AV_CODEC_ID_SGI, |
| AV_CODEC_ID_C93, |
| AV_CODEC_ID_BETHSOFTVID, |
| AV_CODEC_ID_PTX, |
| AV_CODEC_ID_TXD, |
| AV_CODEC_ID_VP6A, |
| AV_CODEC_ID_AMV, |
| AV_CODEC_ID_VB, |
| AV_CODEC_ID_PCX, |
| AV_CODEC_ID_SUNRAST, |
| AV_CODEC_ID_INDEO4, |
| AV_CODEC_ID_INDEO5, |
| AV_CODEC_ID_MIMIC, |
| AV_CODEC_ID_RL2, |
| AV_CODEC_ID_ESCAPE124, |
| AV_CODEC_ID_DIRAC, |
| AV_CODEC_ID_BFI, |
| AV_CODEC_ID_CMV, |
| AV_CODEC_ID_MOTIONPIXELS, |
| AV_CODEC_ID_TGV, |
| AV_CODEC_ID_TGQ, |
| AV_CODEC_ID_TQI, |
| AV_CODEC_ID_AURA, |
| AV_CODEC_ID_AURA2, |
| AV_CODEC_ID_V210X, |
| AV_CODEC_ID_TMV, |
| AV_CODEC_ID_V210, |
| AV_CODEC_ID_DPX, |
| AV_CODEC_ID_MAD, |
| AV_CODEC_ID_FRWU, |
| AV_CODEC_ID_FLASHSV2, |
| AV_CODEC_ID_CDGRAPHICS, |
| AV_CODEC_ID_R210, |
| AV_CODEC_ID_ANM, |
| AV_CODEC_ID_BINKVIDEO, |
| AV_CODEC_ID_IFF_ILBM, |
| AV_CODEC_ID_IFF_BYTERUN1, |
| AV_CODEC_ID_KGV1, |
| AV_CODEC_ID_YOP, |
| AV_CODEC_ID_VP8, |
| AV_CODEC_ID_PICTOR, |
| AV_CODEC_ID_ANSI, |
| AV_CODEC_ID_A64_MULTI, |
| AV_CODEC_ID_A64_MULTI5, |
| AV_CODEC_ID_R10K, |
| AV_CODEC_ID_MXPEG, |
| AV_CODEC_ID_LAGARITH, |
| AV_CODEC_ID_PRORES, |
| AV_CODEC_ID_JV, |
| AV_CODEC_ID_DFA, |
| AV_CODEC_ID_WMV3IMAGE, |
| AV_CODEC_ID_VC1IMAGE, |
| AV_CODEC_ID_UTVIDEO, |
| AV_CODEC_ID_BMV_VIDEO, |
| AV_CODEC_ID_VBLE, |
| AV_CODEC_ID_DXTORY, |
| AV_CODEC_ID_V410, |
| AV_CODEC_ID_XWD, |
| AV_CODEC_ID_CDXL, |
| AV_CODEC_ID_XBM, |
| AV_CODEC_ID_ZEROCODEC, |
| AV_CODEC_ID_MSS1, |
| AV_CODEC_ID_MSA1, |
| AV_CODEC_ID_TSCC2, |
| AV_CODEC_ID_MTS2, |
| AV_CODEC_ID_CLLC, |
| AV_CODEC_ID_MSS2, |
| AV_CODEC_ID_VP9, |
| AV_CODEC_ID_AIC, |
| AV_CODEC_ID_ESCAPE130, |
| AV_CODEC_ID_G2M, |
| AV_CODEC_ID_WEBP, |
| AV_CODEC_ID_HNM4_VIDEO, |
| AV_CODEC_ID_HEVC, |
| AV_CODEC_ID_FIC, |
| AV_CODEC_ID_ALIAS_PIX, |
| AV_CODEC_ID_BRENDER_PIX, |
| AV_CODEC_ID_PAF_VIDEO, |
| AV_CODEC_ID_EXR, |
| AV_CODEC_ID_VP7, |
| AV_CODEC_ID_SANM, |
| AV_CODEC_ID_SGIRLE, |
| AV_CODEC_ID_MVC1, |
| AV_CODEC_ID_MVC2, |
| |
| /* various PCM "codecs" */ |
| AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs |
| AV_CODEC_ID_PCM_S16LE = 0x10000, |
| AV_CODEC_ID_PCM_S16BE, |
| AV_CODEC_ID_PCM_U16LE, |
| AV_CODEC_ID_PCM_U16BE, |
| AV_CODEC_ID_PCM_S8, |
| AV_CODEC_ID_PCM_U8, |
| AV_CODEC_ID_PCM_MULAW, |
| AV_CODEC_ID_PCM_ALAW, |
| AV_CODEC_ID_PCM_S32LE, |
| AV_CODEC_ID_PCM_S32BE, |
| AV_CODEC_ID_PCM_U32LE, |
| AV_CODEC_ID_PCM_U32BE, |
| AV_CODEC_ID_PCM_S24LE, |
| AV_CODEC_ID_PCM_S24BE, |
| AV_CODEC_ID_PCM_U24LE, |
| AV_CODEC_ID_PCM_U24BE, |
| AV_CODEC_ID_PCM_S24DAUD, |
| AV_CODEC_ID_PCM_ZORK, |
| AV_CODEC_ID_PCM_S16LE_PLANAR, |
| AV_CODEC_ID_PCM_DVD, |
| AV_CODEC_ID_PCM_F32BE, |
| AV_CODEC_ID_PCM_F32LE, |
| AV_CODEC_ID_PCM_F64BE, |
| AV_CODEC_ID_PCM_F64LE, |
| AV_CODEC_ID_PCM_BLURAY, |
| AV_CODEC_ID_PCM_LXF, |
| AV_CODEC_ID_S302M, |
| AV_CODEC_ID_PCM_S8_PLANAR, |
| AV_CODEC_ID_PCM_S24LE_PLANAR, |
| AV_CODEC_ID_PCM_S32LE_PLANAR, |
| |
| /* various ADPCM codecs */ |
| AV_CODEC_ID_ADPCM_IMA_QT = 0x11000, |
| AV_CODEC_ID_ADPCM_IMA_WAV, |
| AV_CODEC_ID_ADPCM_IMA_DK3, |
| AV_CODEC_ID_ADPCM_IMA_DK4, |
| AV_CODEC_ID_ADPCM_IMA_WS, |
| AV_CODEC_ID_ADPCM_IMA_SMJPEG, |
| AV_CODEC_ID_ADPCM_MS, |
| AV_CODEC_ID_ADPCM_4XM, |
| AV_CODEC_ID_ADPCM_XA, |
| AV_CODEC_ID_ADPCM_ADX, |
| AV_CODEC_ID_ADPCM_EA, |
| AV_CODEC_ID_ADPCM_G726, |
| AV_CODEC_ID_ADPCM_CT, |
| AV_CODEC_ID_ADPCM_SWF, |
| AV_CODEC_ID_ADPCM_YAMAHA, |
| AV_CODEC_ID_ADPCM_SBPRO_4, |
| AV_CODEC_ID_ADPCM_SBPRO_3, |
| AV_CODEC_ID_ADPCM_SBPRO_2, |
| AV_CODEC_ID_ADPCM_THP, |
| AV_CODEC_ID_ADPCM_IMA_AMV, |
| AV_CODEC_ID_ADPCM_EA_R1, |
| AV_CODEC_ID_ADPCM_EA_R3, |
| AV_CODEC_ID_ADPCM_EA_R2, |
| AV_CODEC_ID_ADPCM_IMA_EA_SEAD, |
| AV_CODEC_ID_ADPCM_IMA_EA_EACS, |
| AV_CODEC_ID_ADPCM_EA_XAS, |
| AV_CODEC_ID_ADPCM_EA_MAXIS_XA, |
| AV_CODEC_ID_ADPCM_IMA_ISS, |
| AV_CODEC_ID_ADPCM_G722, |
| AV_CODEC_ID_ADPCM_IMA_APC, |
| AV_CODEC_ID_ADPCM_VIMA, |
| |
| /* AMR */ |
| AV_CODEC_ID_AMR_NB = 0x12000, |
| AV_CODEC_ID_AMR_WB, |
| |
| /* RealAudio codecs*/ |
| AV_CODEC_ID_RA_144 = 0x13000, |
| AV_CODEC_ID_RA_288, |
| |
| /* various DPCM codecs */ |
| AV_CODEC_ID_ROQ_DPCM = 0x14000, |
| AV_CODEC_ID_INTERPLAY_DPCM, |
| AV_CODEC_ID_XAN_DPCM, |
| AV_CODEC_ID_SOL_DPCM, |
| |
| /* audio codecs */ |
| AV_CODEC_ID_MP2 = 0x15000, |
| AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3 |
| AV_CODEC_ID_AAC, |
| AV_CODEC_ID_AC3, |
| AV_CODEC_ID_DTS, |
| AV_CODEC_ID_VORBIS, |
| AV_CODEC_ID_DVAUDIO, |
| AV_CODEC_ID_WMAV1, |
| AV_CODEC_ID_WMAV2, |
| AV_CODEC_ID_MACE3, |
| AV_CODEC_ID_MACE6, |
| AV_CODEC_ID_VMDAUDIO, |
| AV_CODEC_ID_FLAC, |
| AV_CODEC_ID_MP3ADU, |
| AV_CODEC_ID_MP3ON4, |
| AV_CODEC_ID_SHORTEN, |
| AV_CODEC_ID_ALAC, |
| AV_CODEC_ID_WESTWOOD_SND1, |
| AV_CODEC_ID_GSM, ///< as in Berlin toast format |
| AV_CODEC_ID_QDM2, |
| AV_CODEC_ID_COOK, |
| AV_CODEC_ID_TRUESPEECH, |
| AV_CODEC_ID_TTA, |
| AV_CODEC_ID_SMACKAUDIO, |
| AV_CODEC_ID_QCELP, |
| AV_CODEC_ID_WAVPACK, |
| AV_CODEC_ID_DSICINAUDIO, |
| AV_CODEC_ID_IMC, |
| AV_CODEC_ID_MUSEPACK7, |
| AV_CODEC_ID_MLP, |
| AV_CODEC_ID_GSM_MS, /* as found in WAV */ |
| AV_CODEC_ID_ATRAC3, |
| #if FF_API_VOXWARE |
| AV_CODEC_ID_VOXWARE, |
| #endif |
| AV_CODEC_ID_APE, |
| AV_CODEC_ID_NELLYMOSER, |
| AV_CODEC_ID_MUSEPACK8, |
| AV_CODEC_ID_SPEEX, |
| AV_CODEC_ID_WMAVOICE, |
| AV_CODEC_ID_WMAPRO, |
| AV_CODEC_ID_WMALOSSLESS, |
| AV_CODEC_ID_ATRAC3P, |
| AV_CODEC_ID_EAC3, |
| AV_CODEC_ID_SIPR, |
| AV_CODEC_ID_MP1, |
| AV_CODEC_ID_TWINVQ, |
| AV_CODEC_ID_TRUEHD, |
| AV_CODEC_ID_MP4ALS, |
| AV_CODEC_ID_ATRAC1, |
| AV_CODEC_ID_BINKAUDIO_RDFT, |
| AV_CODEC_ID_BINKAUDIO_DCT, |
| AV_CODEC_ID_AAC_LATM, |
| AV_CODEC_ID_QDMC, |
| AV_CODEC_ID_CELT, |
| AV_CODEC_ID_G723_1, |
| AV_CODEC_ID_G729, |
| AV_CODEC_ID_8SVX_EXP, |
| AV_CODEC_ID_8SVX_FIB, |
| AV_CODEC_ID_BMV_AUDIO, |
| AV_CODEC_ID_RALF, |
| AV_CODEC_ID_IAC, |
| AV_CODEC_ID_ILBC, |
| AV_CODEC_ID_OPUS, |
| AV_CODEC_ID_COMFORT_NOISE, |
| AV_CODEC_ID_TAK, |
| AV_CODEC_ID_METASOUND, |
| AV_CODEC_ID_PAF_AUDIO, |
| AV_CODEC_ID_ON2AVC, |
| |
| /* subtitle codecs */ |
| AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs. |
| AV_CODEC_ID_DVD_SUBTITLE = 0x17000, |
| AV_CODEC_ID_DVB_SUBTITLE, |
| AV_CODEC_ID_TEXT, ///< raw UTF-8 text |
| AV_CODEC_ID_XSUB, |
| AV_CODEC_ID_SSA, |
| AV_CODEC_ID_MOV_TEXT, |
| AV_CODEC_ID_HDMV_PGS_SUBTITLE, |
| AV_CODEC_ID_DVB_TELETEXT, |
| AV_CODEC_ID_SRT, |
| |
| /* other specific kind of codecs (generally used for attachments) */ |
| AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs. |
| AV_CODEC_ID_TTF = 0x18000, |
| |
| AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it |
| |
| AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS |
| * stream (only used by libavformat) */ |
| AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems |
| * stream (only used by libavformat) */ |
| AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information. |
| }; |
| |
| /** |
| * This struct describes the properties of a single codec described by an |
| * AVCodecID. |
| * @see avcodec_get_descriptor() |
| */ |
| typedef struct AVCodecDescriptor { |
| enum AVCodecID id; |
| enum AVMediaType type; |
| /** |
| * Name of the codec described by this descriptor. It is non-empty and |
| * unique for each codec descriptor. It should contain alphanumeric |
| * characters and '_' only. |
| */ |
| const char *name; |
| /** |
| * A more descriptive name for this codec. May be NULL. |
| */ |
| const char *long_name; |
| /** |
| * Codec properties, a combination of AV_CODEC_PROP_* flags. |
| */ |
| int props; |
| } AVCodecDescriptor; |
| |
| /** |
| * Codec uses only intra compression. |
| * Video codecs only. |
| */ |
| #define AV_CODEC_PROP_INTRA_ONLY (1 << 0) |
| /** |
| * Codec supports lossy compression. Audio and video codecs only. |
| * @note a codec may support both lossy and lossless |
| * compression modes |
| */ |
| #define AV_CODEC_PROP_LOSSY (1 << 1) |
| /** |
| * Codec supports lossless compression. Audio and video codecs only. |
| */ |
| #define AV_CODEC_PROP_LOSSLESS (1 << 2) |
| /** |
| * Codec supports frame reordering. That is, the coded order (the order in which |
| * the encoded packets are output by the encoders / stored / input to the |
| * decoders) may be different from the presentation order of the corresponding |
| * frames. |
| * |
| * For codecs that do not have this property set, PTS and DTS should always be |
| * equal. |
| */ |
| #define AV_CODEC_PROP_REORDER (1 << 3) |
| |
| /** |
| * @ingroup lavc_decoding |
| * 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 |
| |
| /** |
| * @ingroup lavc_encoding |
| * minimum encoding buffer size |
| * Used to avoid some checks during header writing. |
| */ |
| #define FF_MIN_BUFFER_SIZE 16384 |
| |
| |
| /** |
| * @ingroup lavc_encoding |
| * 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_TESA, ///< transformed exhaustive search algorithm |
| }; |
| |
| /** |
| * @ingroup lavc_decoding |
| */ |
| 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 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 |
| }; |
| |
| /** |
| * @ingroup lavc_encoding |
| */ |
| 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; |
| |
| #if FF_API_MAX_BFRAMES |
| /** |
| * @deprecated there is no libavcodec-wide limit on the number of B-frames |
| */ |
| #define FF_MAX_B_FRAMES 16 |
| #endif |
| |
| /* encoding support |
| These flags can be passed in AVCodecContext.flags before initialization. |
| Note: Not everything is supported yet. |
| */ |
| |
| /** |
| * Allow decoders to produce frames with data planes that are not aligned |
| * to CPU requirements (e.g. due to cropping). |
| */ |
| #define CODEC_FLAG_UNALIGNED 0x0001 |
| #define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale. |
| #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263. |
| #define CODEC_FLAG_OUTPUT_CORRUPT 0x0008 ///< Output even those frames that might be corrupted |
| #define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC. |
| #if FF_API_GMC |
| /** |
| * @deprecated use the "gmc" private option of the libxvid encoder |
| */ |
| #define CODEC_FLAG_GMC 0x0020 ///< Use GMC. |
| #endif |
| #if FF_API_MV0 |
| /** |
| * @deprecated use the flag "mv0" in the "mpv_flags" private option of the |
| * mpegvideo encoders |
| */ |
| #define CODEC_FLAG_MV0 0x0040 |
| #endif |
| #if FF_API_INPUT_PRESERVED |
| /** |
| * @deprecated passing reference-counted frames to the encoders replaces this |
| * flag |
| */ |
| #define CODEC_FLAG_INPUT_PRESERVED 0x0100 |
| #endif |
| #define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode. |
| #define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode. |
| #define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale. |
| #if FF_API_EMU_EDGE |
| /** |
| * @deprecated edges are not used/required anymore. I.e. this flag is now always |
| * set. |
| */ |
| #define CODEC_FLAG_EMU_EDGE 0x4000 |
| #endif |
| #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding. |
| #define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random |
| location instead of only at frame boundaries. */ |
| #if FF_API_NORMALIZE_AQP |
| /** |
| * @deprecated use the flag "naq" in the "mpv_flags" private option of the |
| * mpegvideo encoders |
| */ |
| #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 |
| #endif |
| #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT. |
| #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay. |
| #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe. |
| #define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT). |
| /* Fx : Flag for h263+ extra options */ |
| #define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction |
| #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter |
| #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation |
| #define CODEC_FLAG_CLOSED_GOP 0x80000000 |
| #define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks. |
| #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding. |
| #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata. |
| #define CODEC_FLAG2_IGNORE_CROP 0x00010000 ///< Discard cropping information from SPS. |
| |
| #define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries. |
| |
| /* 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 |
| #define CODEC_CAP_TRUNCATED 0x0008 |
| #if FF_API_XVMC |
| /* Codec can export data for HW decoding (XvMC). */ |
| #define CODEC_CAP_HWACCEL 0x0010 |
| #endif /* FF_API_XVMC */ |
| /** |
| * Encoder or decoder requires flushing with NULL input at the end in order to |
| * give the complete and correct output. |
| * |
| * NOTE: If this flag is not set, the codec is guaranteed to never be fed with |
| * with NULL data. The user can still send NULL data to the public encode |
| * or decode function, but libavcodec will not pass it along to the codec |
| * unless this flag is set. |
| * |
| * Decoders: |
| * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL, |
| * avpkt->size=0 at the end to get the delayed data until the decoder no longer |
| * returns frames. |
| * |
| * Encoders: |
| * The encoder needs to be fed with NULL data at the end of encoding until the |
| * encoder no longer returns data. |
| * |
| * NOTE: For encoders implementing the AVCodec.encode2() function, setting this |
| * flag also means that the encoder must set the pts and duration for |
| * each output packet. If this flag is not set, the pts and duration will |
| * be determined by libavcodec from the input frame. |
| */ |
| #define CODEC_CAP_DELAY 0x0020 |
| /** |
| * 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 |
| #if FF_API_CAP_VDPAU |
| /** |
| * Codec can export data for HW decoding (VDPAU). |
| */ |
| #define CODEC_CAP_HWACCEL_VDPAU 0x0080 |
| #endif |
| /** |
| * 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 |
| #if FF_API_NEG_LINESIZES |
| /** |
| * @deprecated no codecs use this capability |
| */ |
| #define CODEC_CAP_NEG_LINESIZES 0x0800 |
| #endif |
| /** |
| * 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 supports changed parameters at any point. |
| */ |
| #define CODEC_CAP_PARAM_CHANGE 0x4000 |
| /** |
| * Codec supports avctx->thread_count == 0 (auto). |
| */ |
| #define CODEC_CAP_AUTO_THREADS 0x8000 |
| /** |
| * Audio encoder supports receiving a different number of samples in each call. |
| */ |
| #define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000 |
| |
| #if FF_API_MB_TYPE |
| //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, ...) |
| #endif |
| |
| /** |
| * 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; |
| |
| #if FF_API_QSCALE_TYPE |
| #define FF_QSCALE_TYPE_MPEG1 0 |
| #define FF_QSCALE_TYPE_MPEG2 1 |
| #define FF_QSCALE_TYPE_H264 2 |
| #define FF_QSCALE_TYPE_VP56 3 |
| #endif |
| |
| #if FF_API_GET_BUFFER |
| #define FF_BUFFER_TYPE_INTERNAL 1 |
| #define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user) |
| #define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared. |
| #define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything. |
| |
| #define FF_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). |
| #endif |
| |
| /** |
| * The decoder will keep a reference to the frame and may reuse it later. |
| */ |
| #define AV_GET_BUFFER_FLAG_REF (1 << 0) |
| |
| /** |
| * @defgroup lavc_packet AVPacket |
| * |
| * Types and functions for working with AVPacket. |
| * @{ |
| */ |
| enum AVPacketSideDataType { |
| AV_PKT_DATA_PALETTE, |
| AV_PKT_DATA_NEW_EXTRADATA, |
| |
| /** |
| * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows: |
| * @code |
| * u32le param_flags |
| * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) |
| * s32le channel_count |
| * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) |
| * u64le channel_layout |
| * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) |
| * s32le sample_rate |
| * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) |
| * s32le width |
| * s32le height |
| * @endcode |
| */ |
| AV_PKT_DATA_PARAM_CHANGE, |
| |
| /** |
| * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of |
| * structures with info about macroblocks relevant to splitting the |
| * packet into smaller packets on macroblock edges (e.g. as for RFC 2190). |
| * That is, it does not necessarily contain info about all macroblocks, |
| * as long as the distance between macroblocks in the info is smaller |
| * than the target payload size. |
| * Each MB info structure is 12 bytes, and is laid out as follows: |
| * @code |
| * u32le bit offset from the start of the packet |
| * u8 current quantizer at the start of the macroblock |
| * u8 GOB number |
| * u16le macroblock address within the GOB |
| * u8 horizontal MV predictor |
| * u8 vertical MV predictor |
| * u8 horizontal MV predictor for block number 3 |
| * u8 vertical MV predictor for block number 3 |
| * @endcode |
| */ |
| AV_PKT_DATA_H263_MB_INFO, |
| |
| /** |
| * This side data should be associated with an audio stream and contains |
| * ReplayGain information in form of the AVReplayGain struct. |
| */ |
| AV_PKT_DATA_REPLAYGAIN, |
| |
| /** |
| * This side data contains a 3x3 transformation matrix describing an affine |
| * transformation that needs to be applied to the decoded video frames for |
| * correct presentation. |
| * |
| * See libavutil/display.h for a detailed description of the data. |
| */ |
| AV_PKT_DATA_DISPLAYMATRIX, |
| |
| /** |
| * This side data should be associated with a video stream and contains |
| * Stereoscopic 3D information in form of the AVStereo3D struct. |
| */ |
| AV_PKT_DATA_STEREO3D, |
| }; |
| |
| typedef struct AVPacketSideData { |
| uint8_t *data; |
| int size; |
| enum AVPacketSideDataType type; |
| } AVPacketSideData; |
| |
| /** |
| * This structure stores compressed data. It is typically exported by demuxers |
| * and then passed as input to decoders, or received as output from encoders and |
| * then passed to muxers. |
| * |
| * For video, it should typically contain one compressed frame. For audio it may |
| * contain several compressed frames. |
| * |
| * AVPacket is one of the few structs in Libav, whose size is a part of public |
| * ABI. Thus it may be allocated on stack and no new fields can be added to it |
| * without libavcodec and libavformat major bump. |
| * |
| * The semantics of data ownership depends on the buf or destruct (deprecated) |
| * fields. If either is set, the packet data is dynamically allocated and is |
| * valid indefinitely until av_free_packet() is called (which in turn calls |
| * av_buffer_unref()/the destruct callback to free the data). If neither is set, |
| * the packet data is typically backed by some static buffer somewhere and is |
| * only valid for a limited time (e.g. until the next read call when demuxing). |
| * |
| * The side data is always allocated with av_malloc() and is freed in |
| * av_free_packet(). |
| */ |
| typedef struct AVPacket { |
| /** |
| * A reference to the reference-counted buffer where the packet data is |
| * stored. |
| * May be NULL, then the packet data is not reference-counted. |
| */ |
| AVBufferRef *buf; |
| /** |
| * 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; |
| /** |
| * A combination of AV_PKT_FLAG values |
| */ |
| int flags; |
| /** |
| * Additional packet data that can be provided by the container. |
| * Packet can contain several types of side information. |
| */ |
| AVPacketSideData *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; |
| #if FF_API_DESTRUCT_PACKET |
| attribute_deprecated |
| void (*destruct)(struct AVPacket *); |
| attribute_deprecated |
| void *priv; |
| #endif |
| 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 ///< The packet contains a keyframe |
| #define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted |
| |
| enum AVSideDataParamChangeFlags { |
| AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001, |
| AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002, |
| AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004, |
| AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008, |
| }; |
| /** |
| * @} |
| */ |
| |
| struct AVCodecInternal; |
| |
| enum AVFieldOrder { |
| AV_FIELD_UNKNOWN, |
| AV_FIELD_PROGRESSIVE, |
| AV_FIELD_TT, //< Top coded_first, top displayed first |
| AV_FIELD_BB, //< Bottom coded first, bottom displayed first |
| AV_FIELD_TB, //< Top coded first, bottom displayed first |
| AV_FIELD_BT, //< Bottom coded first, top displayed first |
| }; |
| |
| /** |
| * 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_context3 |
| */ |
| const AVClass *av_class; |
| int log_level_offset; |
| |
| enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */ |
| const struct AVCodec *codec; |
| #if FF_API_CODEC_NAME |
| /** |
| * @deprecated this field is not used for anything in libavcodec |
| */ |
| attribute_deprecated |
| char codec_name[32]; |
| #endif |
| enum AVCodecID codec_id; /* see AV_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 than 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; |
| |
| /** |
| * 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; |
| |
| void *priv_data; |
| |
| /** |
| * Private context used for internal data. |
| * |
| * Unlike priv_data, this is not codec-specific. It is used in general |
| * libavcodec functions. |
| */ |
| struct AVCodecInternal *internal; |
| |
| /** |
| * Private data of the user, can be used to carry app specific stuff. |
| * - encoding: Set by user. |
| * - decoding: Set by user. |
| */ |
| void *opaque; |
| |
| /** |
| * 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; |
| |
| /** |
| * 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; |
| |
| /** |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int compression_level; |
| #define FF_COMPRESSION_DEFAULT -1 |
| |
| /** |
| * CODEC_FLAG_*. |
| * - encoding: Set by user. |
| * - decoding: Set by user. |
| */ |
| int flags; |
| |
| /** |
| * CODEC_FLAG2_* |
| * - encoding: Set by user. |
| * - decoding: Set by user. |
| */ |
| int flags2; |
| |
| /** |
| * 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; |
| |
| /** |
| * 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; |
| |
| /** |
| * Codec delay. |
| * |
| * Video: |
| * Number of frames the decoded output will be delayed relative to the |
| * encoded input. |
| * |
| * Audio: |
| * For encoding, this is the number of "priming" samples added by the |
| * encoder to the beginning of the stream. The decoded output will be |
| * delayed by this many samples relative to the input to the encoder (or |
| * more, if the decoder adds its own padding). |
| * The timestamps on the output packets are adjusted by the encoder so |
| * that they always refer to the first sample of the data actually |
| * contained in the packet, including any added padding. |
| * E.g. if the timebase is 1/samplerate and the timestamp of the first |
| * input sample is 0, the timestamp of the first output packet will be |
| * -delay. |
| * |
| * For decoding, this is the number of samples the decoder needs to |
| * output before the decoder's output is valid. When seeking, you should |
| * start decoding this many samples prior to your desired seek point. |
| * |
| * - encoding: Set by libavcodec. |
| * - decoding: Set by libavcodec. |
| */ |
| int delay; |
| |
| |
| /* video only */ |
| /** |
| * picture width / height. |
| * |
| * @note Those fields may not match the values of the last |
| * AVFrame outputted by avcodec_decode_video2 due frame |
| * reordering. |
| * |
| * - encoding: MUST be set by user. |
| * - decoding: May be set by the user before opening the decoder if known e.g. |
| * from the container. Some decoders will require the dimensions |
| * to be set by the caller. During decoding, the decoder may |
| * overwrite those values as required while parsing the data. |
| */ |
| int width, height; |
| |
| /** |
| * Bitstream width / height, may be different from width/height e.g. when |
| * the decoded frame is cropped before being output. |
| * |
| * @note Those field may not match the value of the last |
| * AVFrame outputted by avcodec_decode_video2 due frame |
| * reordering. |
| * |
| * - encoding: unused |
| * - decoding: May be set by the user before opening the decoder if known |
| * e.g. from the container. During decoding, the decoder may |
| * overwrite those values as required while parsing the data. |
| */ |
| int coded_width, coded_height; |
| |
| #if FF_API_ASPECT_EXTENDED |
| #define FF_ASPECT_EXTENDED 15 |
| #endif |
| |
| /** |
| * 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 AV_PIX_FMT_xxx. |
| * May be set by the demuxer if known from headers. |
| * May be overriden by the decoder if it knows better. |
| * |
| * @note This field may not match the value of the last |
| * AVFrame outputted by avcodec_decode_video2 due frame |
| * reordering. |
| * |
| * - encoding: Set by user. |
| * - decoding: Set by user if known, overridden by libavcodec while |
| * parsing the data. |
| */ |
| enum AVPixelFormat pix_fmt; |
| |
| /** |
| * Motion estimation algorithm used for video coding. |
| * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex), |
| * 8 (umh), 10 (tesa) [7, 8, 10 are x264 specific] |
| * - encoding: MUST be set by user. |
| * - decoding: unused |
| */ |
| int me_method; |
| |
| /** |
| * 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[AV_NUM_DATA_POINTERS], |
| int y, int type, int height); |
| |
| /** |
| * 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 AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt); |
| |
| /** |
| * 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; |
| |
| /** |
| * qscale offset between IP and B-frames |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| float b_quant_offset; |
| |
| /** |
| * 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; |
| |
| /** |
| * 0-> h263 quant 1-> mpeg quant |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int mpeg_quant; |
| |
| /** |
| * 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; |
| |
| /** |
| * 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; |
| |
| /** |
| * slice count |
| * - encoding: Set by libavcodec. |
| * - decoding: Set by user (or 0). |
| */ |
| int slice_count; |
| /** |
| * 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 |
| |
| /** |
| * slice offsets in the frame in bytes |
| * - encoding: Set/allocated by libavcodec. |
| * - decoding: Set/allocated by user (or NULL). |
| */ |
| int *slice_offset; |
| |
| /** |
| * 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; |
| |
| /** |
| * 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_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; |
| |
| #if FF_API_AFD |
| /** |
| * 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. |
| * @deprecated Deprecated in favor of AVSideData |
| */ |
| attribute_deprecated 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 |
| #endif /* FF_API_AFD */ |
| |
| /** |
| * 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; |
| |
| /** |
| * 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) |
| |
| #if FF_API_XVMC |
| /** |
| * XVideo Motion Acceleration |
| * - encoding: forbidden |
| * - decoding: set by decoder |
| * @deprecated XvMC support is slated for removal. |
| */ |
| attribute_deprecated int xvmc_acceleration; |
| #endif /* FF_API_XVMC */ |
| |
| /** |
| * 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; |
| |
| /** |
| * scene change detection threshold |
| * 0 is default, larger means fewer detected scene changes. |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int scenechange_threshold; |
| |
| /** |
| * noise reduction strength |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int noise_reduction; |
| |
| /** |
| * 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; |
| |
| /** |
| * 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; |
| |
| /** |
| * 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: Set by user. |
| * - decoding: unused |
| */ |
| int bidir_refine; |
| |
| /** |
| * |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int brd_scale; |
| |
| /** |
| * 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; |
| |
| #if FF_API_UNUSED_MEMBERS |
| /** |
| * Multiplied by qscale for each frame and added to scene_change_score. |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| attribute_deprecated int scenechange_factor; |
| #endif |
| |
| /** |
| * |
| * Note: Value depends upon the compare function used for fullpel ME. |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int mv0_threshold; |
| |
| /** |
| * Adjust sensitivity of b_frame_strategy 1. |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int b_sensitivity; |
| |
| /** |
| * 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; |
| |
| /** |
| * Number of slices. |
| * Indicates number of picture subdivisions. Used for parallelized |
| * decoding. |
| * - encoding: Set by user |
| * - decoding: unused |
| */ |
| int slices; |
| |
| /** Field order |
| * - encoding: set by libavcodec |
| * - decoding: Set by libavcodec |
| */ |
| enum AVFieldOrder field_order; |
| |
| /* 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. */ |
| /** |
| * Number of samples per channel in an audio frame. |
| * |
| * - encoding: set by libavcodec in avcodec_open2(). Each submitted frame |
| * except the last must contain exactly frame_size samples per channel. |
| * May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, then the |
| * frame size is not restricted. |
| * - decoding: may be set by some decoders to indicate constant frame size |
| */ |
| int frame_size; |
| |
| /** |
| * Frame counter, set by libavcodec. |
| * |
| * - decoding: total number of frames returned from the decoder so far. |
| * - encoding: total number of frames passed to the encoder so far. |
| * |
| * @note the counter is not incremented if encoding/decoding resulted in |
| * an error. |
| */ |
| int frame_number; |
| |
| /** |
| * number of bytes per packet if constant and known or 0 |
| * Used by some WAV based audio codecs. |
| */ |
| int block_align; |
| |
| /** |
| * Audio cutoff bandwidth (0 means "automatic") |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int cutoff; |
| |
| #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. |
| */ |
| attribute_deprecated int request_channels; |
| #endif |
| |
| /** |
| * Audio channel layout. |
| * - encoding: set by user. |
| * - decoding: set by libavcodec. |
| */ |
| uint64_t channel_layout; |
| |
| /** |
| * Request decoder to use this channel layout if it can (0 for default) |
| * - encoding: unused |
| * - decoding: Set by user. |
| */ |
| uint64_t request_channel_layout; |
| |
| /** |
| * Type of service that the audio stream conveys. |
| * - encoding: Set by user. |
| * - decoding: Set by libavcodec. |
| */ |
| enum AVAudioServiceType audio_service_type; |
| |
| /** |
| * Used to request a sample format from the decoder. |
| * - encoding: unused. |
| * - decoding: Set by user. |
| */ |
| enum AVSampleFormat request_sample_fmt; |
| |
| #if FF_API_GET_BUFFER |
| /** |
| * Called at the beginning of each frame to get a buffer for it. |
| * |
| * The function will set AVFrame.data[], AVFrame.linesize[]. |
| * AVFrame.extended_data[] must also be set, but it should be the same as |
| * AVFrame.data[] except for planar audio with more channels than can fit |
| * in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as |
| * many data pointers as it can hold. |
| * |
| * 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. |
| * |
| * AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't |
| * need it. avcodec_default_get_buffer() aligns the output buffer properly, |
| * but if get_buffer() is overridden then alignment considerations should |
| * be taken into account. |
| * |
| * @see avcodec_default_get_buffer() |
| * |
| * Video: |
| * |
| * 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 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. |
| * |
| * @see release_buffer(), reget_buffer() |
| * @see avcodec_align_dimensions2() |
| * |
| * Audio: |
| * |
| * Decoders request a buffer of a particular size by setting |
| * AVFrame.nb_samples prior to calling get_buffer(). The decoder may, |
| * however, utilize only part of the buffer by setting AVFrame.nb_samples |
| * to a smaller value in the output frame. |
| * |
| * Decoders cannot use the buffer after returning from |
| * avcodec_decode_audio4(), so they will not call release_buffer(), as it |
| * is assumed to be released immediately upon return. In some rare cases, |
| * a decoder may need to call get_buffer() more than once in a single |
| * call to avcodec_decode_audio4(). In that case, when get_buffer() is |
| * called again after it has already been called once, the previously |
| * acquired buffer is assumed to be released at that time and may not be |
| * reused by the decoder. |
| * |
| * As a convenience, av_samples_get_buffer_size() and |
| * av_samples_fill_arrays() in libavutil may be used by custom get_buffer() |
| * functions to find the required data size and to fill data pointers and |
| * linesize. In AVFrame.linesize, only linesize[0] may be set for audio |
| * since all planes must be the same size. |
| * |
| * @see av_samples_get_buffer_size(), av_samples_fill_arrays() |
| * |
| * - encoding: unused |
| * - decoding: Set by libavcodec, user can override. |
| * |
| * @deprecated use get_buffer2() |
| */ |
| attribute_deprecated |
| 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. |
| * |
| * @deprecated custom freeing callbacks should be set from get_buffer2() |
| */ |
| attribute_deprecated |
| void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic); |
| |
| /** |
| * 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. |
| */ |
| attribute_deprecated |
| int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic); |
| #endif |
| |
| /** |
| * This callback is called at the beginning of each frame to get data |
| * buffer(s) for it. There may be one contiguous buffer for all the data or |
| * there may be a buffer per each data plane or anything in between. What |
| * this means is, you may set however many entries in buf[] you feel necessary. |
| * Each buffer must be reference-counted using the AVBuffer API (see description |
| * of buf[] below). |
| * |
| * The following fields will be set in the frame before this callback is |
| * called: |
| * - format |
| * - width, height (video only) |
| * - sample_rate, channel_layout, nb_samples (audio only) |
| * Their values may differ from the corresponding values in |
| * AVCodecContext. This callback must use the frame values, not the codec |
| * context values, to calculate the required buffer size. |
| * |
| * This callback must fill the following fields in the frame: |
| * - data[] |
| * - linesize[] |
| * - extended_data: |
| * * if the data is planar audio with more than 8 channels, then this |
| * callback must allocate and fill extended_data to contain all pointers |
| * to all data planes. data[] must hold as many pointers as it can. |
| * extended_data must be allocated with av_malloc() and will be freed in |
| * av_frame_unref(). |
| * * otherwise exended_data must point to data |
| * - buf[] must contain one or more pointers to AVBufferRef structures. Each of |
| * the frame's data and extended_data pointers must be contained in these. That |
| * is, one AVBufferRef for each allocated chunk of memory, not necessarily one |
| * AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(), |
| * and av_buffer_ref(). |
| * - extended_buf and nb_extended_buf must be allocated with av_malloc() by |
| * this callback and filled with the extra buffers if there are more |
| * buffers than buf[] can hold. extended_buf will be freed in |
| * av_frame_unref(). |
| * |
| * If CODEC_CAP_DR1 is not set then get_buffer2() must call |
| * avcodec_default_get_buffer2() instead of providing buffers allocated by |
| * some other means. |
| * |
| * Each data plane must be aligned to the maximum required by the target |
| * CPU. |
| * |
| * @see avcodec_default_get_buffer2() |
| * |
| * Video: |
| * |
| * If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused |
| * (read and/or written to if it is writable) 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 frame multithreading is used and thread_safe_callbacks is set, |
| * this callback may be called from a different thread, but not from more |
| * than one at once. Does not need to be reentrant. |
| * |
| * @see avcodec_align_dimensions2() |
| * |
| * Audio: |
| * |
| * Decoders request a buffer of a particular size by setting |
| * AVFrame.nb_samples prior to calling get_buffer2(). The decoder may, |
| * however, utilize only part of the buffer by setting AVFrame.nb_samples |
| * to a smaller value in the output frame. |
| * |
| * As a convenience, av_samples_get_buffer_size() and |
| * av_samples_fill_arrays() in libavutil may be used by custom get_buffer2() |
| * functions to find the required data size and to fill data pointers and |
| * linesize. In AVFrame.linesize, only linesize[0] may be set for audio |
| * since all planes must be the same size. |
| * |
| * @see av_samples_get_buffer_size(), av_samples_fill_arrays() |
| * |
| * - encoding: unused |
| * - decoding: Set by libavcodec, user can override. |
| */ |
| int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags); |
| |
| /** |
| * If non-zero, the decoded audio and video frames returned from |
| * avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted |
| * and are valid indefinitely. The caller must free them with |
| * av_frame_unref() when they are not needed anymore. |
| * Otherwise, the decoded frames must not be freed by the caller and are |
| * only valid until the next decode call. |
| * |
| * - encoding: unused |
| * - decoding: set by the caller before avcodec_open2(). |
| */ |
| int refcounted_frames; |
| |
| /* - 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; |
| |
| /** |
| * ratecontrol qmin qmax limiting method |
| * 0-> clipping, 1-> use a nice continuous function to limit qscale wthin qmin/qmax. |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| float rc_qsquish; |
| |
| float rc_qmod_amp; |
| int rc_qmod_freq; |
| |
| /** |
| * decoder bitstream buffer size |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int rc_buffer_size; |
| |
| /** |
| * ratecontrol override, see RcOverride |
| * - encoding: Allocated/set/freed by user. |
| * - decoding: unused |
| */ |
| int rc_override_count; |
| RcOverride *rc_override; |
| |
| /** |
| * 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; |
| |
| float rc_buffer_aggressivity; |
| |
| /** |
| * initial complexity for pass1 ratecontrol |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| float rc_initial_cplx; |
| |
| /** |
| * 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; |
| |
| /** |
| * 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; |
| |
| #define FF_CODER_TYPE_VLC 0 |
| #define FF_CODER_TYPE_AC 1 |
| #define FF_CODER_TYPE_RAW 2 |
| #define FF_CODER_TYPE_RLE 3 |
| #if FF_API_UNUSED_MEMBERS |
| #define FF_CODER_TYPE_DEFLATE 4 |
| #endif /* FF_API_UNUSED_MEMBERS */ |
| /** |
| * coder type |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int coder_type; |
| |
| /** |
| * context model |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int context_model; |
| |
| /** |
| * minimum Lagrange multipler |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int lmin; |
| |
| /** |
| * maximum Lagrange multipler |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int lmax; |
| |
| /** |
| * 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; |
| |
| /** |
| * trellis RD quantization |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int trellis; |
| |
| /** |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int min_prediction_order; |
| |
| /** |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int max_prediction_order; |
| |
| /** |
| * GOP timecode frame start number, in non drop frame format |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int64_t timecode_frame_start; |
| |
| /* 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); |
| |
| 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. */ |
| |
| /* 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; |
| |
| /** |
| * 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; |
| |
| /** |
| * 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 |
| #if FF_API_OLD_MSMPEG4 |
| #define FF_BUG_OLD_MSMPEG4 2 |
| #endif |
| #define FF_BUG_XVID_ILACE 4 |
| #define FF_BUG_UMP4 8 |
| #define FF_BUG_NO_PADDING 16 |
| #define FF_BUG_AMV 32 |
| #if FF_API_AC_VLC |
| #define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default. |
| #endif |
| #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 |
| |
| /** |
| * 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. |
| |
| /** |
| * error concealment flags |
| * - encoding: unused |
| * - decoding: Set by user. |
| */ |
| int error_concealment; |
| #define FF_EC_GUESS_MVS 1 |
| #define FF_EC_DEBLOCK 2 |
| |
| /** |
| * 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 |
| #if FF_API_DEBUG_MV |
| /** |
| * @deprecated this option does nothing |
| */ |
| #define FF_DEBUG_MV 32 |
| #endif |
| #define FF_DEBUG_DCT_COEFF 0x00000040 |
| #define FF_DEBUG_SKIP 0x00000080 |
| #define FF_DEBUG_STARTCODE 0x00000100 |
| #if FF_API_UNUSED_MEMBERS |
| #define FF_DEBUG_PTS 0x00000200 |
| #endif /* FF_API_UNUSED_MEMBERS */ |
| #define FF_DEBUG_ER 0x00000400 |
| #define FF_DEBUG_MMCO 0x00000800 |
| #define FF_DEBUG_BUGS 0x00001000 |
| #if FF_API_DEBUG_MV |
| #define FF_DEBUG_VIS_QP 0x00002000 |
| #define FF_DEBUG_VIS_MB_TYPE 0x00004000 |
| #endif |
| #define FF_DEBUG_BUFFERS 0x00008000 |
| #define FF_DEBUG_THREADS 0x00010000 |
| |
| #if FF_API_DEBUG_MV |
| /** |
| * @deprecated this option does not have any effect |
| */ |
| attribute_deprecated |
| int debug_mv; |
| #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames |
| #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames |
| #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames |
| #endif |
| |
| /** |
| * Error recognition; may misdetect some more or less valid parts as errors. |
| * - encoding: unused |
| * - decoding: Set by user. |
| */ |
| int err_recognition; |
| |
| /** |
| * Verify checksums embedded in the bitstream (could be of either encoded or |
| * decoded data, depending on the codec) and print an error message on mismatch. |
| * If AV_EF_EXPLODE is also set, a mismatching checksum will result in the |
| * decoder returning an error. |
| */ |
| #define AV_EF_CRCCHECK (1<<0) |
| #define AV_EF_BITSTREAM (1<<1) |
| #define AV_EF_BUFFER (1<<2) |
| #define AV_EF_EXPLODE (1<<3) |
| |
| /** |
| * opaque 64bit number (generally a PTS) that will be reordered and |
| * output in AVFrame.reordered_opaque |
| * - encoding: unused |
| * - decoding: Set by user. |
| */ |
| int64_t reordered_opaque; |
| |
| /** |
| * Hardware accelerator in use |
| * - encoding: unused. |
| * - decoding: Set by libavcodec |
| */ |
| struct AVHWAccel *hwaccel; |
| |
| /** |
| * Hardware accelerator context. |
| * For some hardware accelerators, a global context needs to be |
| * provided by the user. In that case, this holds display-dependent |
| * data Libav cannot instantiate itself. Please refer to the |
| * Libav HW accelerator documentation to know how to fill this |
| * is. e.g. for VA API, this is a struct vaapi_context. |
| * - encoding: unused |
| * - decoding: Set by user |
| */ |
| void *hwaccel_context; |
| |
| /** |
| * error |
| * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR. |
| * - decoding: unused |
| */ |
| uint64_t error[AV_NUM_DATA_POINTERS]; |
| |
| /** |
| * 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 |
| #if FF_API_UNUSED_MEMBERS |
| #define FF_DCT_INT 2 |
| #endif /* FF_API_UNUSED_MEMBERS */ |
| #define FF_DCT_MMX 3 |
| #define FF_DCT_ALTIVEC 5 |
| #define FF_DCT_FAAN 6 |
| |
| /** |
| * 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_ARM 7 |
| #define FF_IDCT_ALTIVEC 8 |
| #if FF_API_ARCH_SH4 |
| #define FF_IDCT_SH4 9 |
| #endif |
| #define FF_IDCT_SIMPLEARM 10 |
| #if FF_API_UNUSED_MEMBERS |
| #define FF_IDCT_IPP 13 |
| #endif /* FF_API_UNUSED_MEMBERS */ |
| #define FF_IDCT_XVID 14 |
| #if FF_API_IDCT_XVIDMMX |
| #define FF_IDCT_XVIDMMX 14 |
| #endif /* FF_API_IDCT_XVIDMMX */ |
| #define FF_IDCT_SIMPLEARMV5TE 16 |
| #define FF_IDCT_SIMPLEARMV6 17 |
| #if FF_API_ARCH_SPARC |
| #define FF_IDCT_SIMPLEVIS 18 |
| #endif |
| #define FF_IDCT_FAAN 20 |
| #define FF_IDCT_SIMPLENEON 22 |
| #if FF_API_ARCH_ALPHA |
| #define FF_IDCT_SIMPLEALPHA 23 |
| #endif |
| |
| /** |
| * bits per sample/pixel from the demuxer (needed for huffyuv). |
| * - encoding: Set by libavcodec. |
| * - decoding: Set by user. |
| */ |
| int bits_per_coded_sample; |
| |
| /** |
| * Bits per sample/pixel of internal libavcodec pixel/sample format. |
| * - encoding: set by user. |
| * - decoding: set by libavcodec. |
| */ |
| int bits_per_raw_sample; |
| |
| #if FF_API_LOWRES |
| /** |
| * low resolution decoding, 1-> 1/2 size, 2->1/4 size |
| * - encoding: unused |
| * - decoding: Set by user. |
| * |
| * @deprecated use decoder private options instead |
| */ |
| attribute_deprecated int lowres; |
| #endif |
| |
| /** |
| * the picture in the bitstream |
| * - encoding: Set by libavcodec. |
| * - decoding: unused |
| */ |
| AVFrame *coded_frame; |
| |
| /** |
| * 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; |
| |
| /** |
| * 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 |
| * synchronously 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; |
| |
| /** |
| * 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); |
| |
| /** |
| * 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); |
| |
| #if FF_API_THREAD_OPAQUE |
| /** |
| * @deprecated this field should not be used from outside of lavc |
| */ |
| attribute_deprecated |
| void *thread_opaque; |
| #endif |
| |
| /** |
| * noise vs. sse weight for the nsse comparsion function |
| * - encoding: Set by user. |
| * - decoding: unused |
| */ |
| int nsse_weight; |
| |
| /** |
| * 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_AAC_HE 4 |
| #define FF_PROFILE_AAC_HE_V2 28 |
| #define FF_PROFILE_AAC_LD 22 |
| #define FF_PROFILE_AAC_ELD 38 |
| #define FF_PROFILE_MPEG2_AAC_LOW 128 |
| #define FF_PROFILE_MPEG2_AAC_HE 131 |
| |
| #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 |
| |
| #define FF_PROFILE_MPEG4_SIMPLE 0 |
| #define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1 |
| #define FF_PROFILE_MPEG4_CORE 2 |
| #define FF_PROFILE_MPEG4_MAIN 3 |
| #define FF_PROFILE_MPEG4_N_BIT 4 |
| #define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5 |
| #define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6 |
| #define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7 |
| #define FF_PROFILE_MPEG4_HYBRID 8 |
| #define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9 |
| #define FF_PROFILE_MPEG4_CORE_SCALABLE 10 |
| #define FF_PROFILE_MPEG4_ADVANCED_CODING 11 |
| #define FF_PROFILE_MPEG4_ADVANCED_CORE 12 |
| #define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13 |
| #define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14 |
| #define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15 |
| |
| #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 0 |
| #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 1 |
| #define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 2 |
| #define FF_PROFILE_JPEG2000_DCINEMA_2K 3 |
| #define FF_PROFILE_JPEG2000_DCINEMA_4K 4 |
| |
| |
| #define FF_PROFILE_HEVC_MAIN 1 |
| #define FF_PROFILE_HEVC_MAIN_10 2 |
| #define FF_PROFILE_HEVC_MAIN_STILL_PICTURE 3 |
| |
| /** |
| * level |
| * - encoding: Set by user. |
| * - decoding: Set by libavcodec. |
| */ |
| int level; |
| #define FF_LEVEL_UNKNOWN -99 |
| |
| /** |
| * |
| * - 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; |
| |
| /** |
| * 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_open2()) |
| * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2()) |
| */ |
| uint8_t *subtitle_header; |
| int subtitle_header_size; |
| |
| #if FF_API_ERROR_RATE |
| /** |
| * @deprecated use the 'error_rate' private AVOption of the mpegvideo |
| * encoders |
| */ |
| attribute_deprecated |
| int error_rate; |
| #endif |
| |
| #if FF_API_CODEC_PKT |
| /** |
| * @deprecated this field is not supposed to be accessed from outside lavc |
| */ |
| attribute_deprecated |
| AVPacket *pkt; |
| #endif |
| |
| /** |
| * 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; |
| |
| /** |
| * Encoding only. Allow encoders to output packets that do not contain any |
| * encoded data, only side data. |
| * |
| * Some encoders need to output such packets, e.g. to update some stream |
| * parameters at the end of encoding. |
| * |
| * All callers are strongly recommended to set this option to 1 and update |
| * their code to deal with such packets, since this behaviour may become |
| * always enabled in the future (then this option will be deprecated and |
| * later removed). To avoid ABI issues when this happens, the callers should |
| * use AVOptions to set this field. |
| */ |
| int side_data_only_packets; |
| } AVCodecContext; |
| |
| /** |
| * AVProfile. |
| */ |
| typedef struct AVProfile { |
| int profile; |
| const char *name; ///< short name for the profile |
| } AVProfile; |
| |
| typedef struct AVCodecDefault AVCodecDefault; |
| |
| struct AVSubtitle; |
| |
| /** |
| * 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; |
| /** |
| * 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; |
| enum AVMediaType type; |
| enum AVCodecID id; |
| /** |
| * Codec capabilities. |
| * see CODEC_CAP_* |
| */ |
| int capabilities; |
| const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0} |
| const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1 |
| const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0 |
| const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1 |
| const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0 |
| #if FF_API_LOWRES |
| attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder |
| #endif |
| 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} |
| |
| /***************************************************************** |
| * No fields below this line are part of the public API. They |
| * may not be used outside of libavcodec and can be changed and |
| * removed at will. |
| * New public fields should be added right above. |
| ***************************************************************** |
| */ |
| int priv_data_size; |
| struct AVCodec *next; |
| /** |
| * @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); |
| /** @} */ |
| |
| /** |
| * Private codec-specific defaults. |
| */ |
| const AVCodecDefault *defaults; |
| |
| /** |
| * Initialize codec static data, called from avcodec_register(). |
| */ |
| void (*init_static_data)(struct AVCodec *codec); |
| |
| int (*init)(AVCodecContext *); |
| int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size, |
| const struct AVSubtitle *sub); |
| /** |
| * Encode data to an AVPacket. |
| * |
| * @param avctx codec context |
| * @param avpkt output AVPacket (may contain a user-provided buffer) |
| * @param[in] frame AVFrame containing the raw data to be encoded |
| * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a |
| * non-empty packet was returned in avpkt. |
| * @return 0 on success, negative error code on failure |
| */ |
| int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, |
| int *got_packet_ptr); |
| int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt); |
| int (*close)(AVCodecContext *); |
| /** |
| * Flush buffers. |
| * Will be called when seeking |
| */ |
| void (*flush)(AVCodecContext *); |
| } 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 AV_CODEC_ID_xxx |
| */ |
| enum AVCodecID id; |
| |
| /** |
| * Supported pixel format. |
| * |
| * Only hardware accelerated formats are supported here. |
| */ |
| enum AVPixelFormat pix_fmt; |
| |
| /** |
| * Hardware accelerated codec capabilities. |
| * see FF_HWACCEL_CODEC_CAP_* |
| */ |
| int capabilities; |
| |
| /***************************************************************** |
| * No fields below this line are part of the public API. They |
| * may not be used outside of libavcodec and can be changed and |
| * removed at will. |
| * New public fields should be added right above. |
| ***************************************************************** |
| */ |
| struct AVHWAccel *next; |
| |
| /** |
| * Allocate a custom buffer |
| */ |
| int (*alloc_frame)(AVCodecContext *avctx, AVFrame *frame); |
| |
| /** |
| * 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 per-frame hardware accelerator private data. |
| * |
| * Private data is allocated with av_mallocz() before |
| * AVCodecContext.get_buffer() and deallocated after |
| * AVCodecContext.release_buffer(). |
| */ |
| int frame_priv_data_size; |
| |
| /** |
| * Initialize the hwaccel private data. |
| * |
| * This will be called from ff_get_format(), after hwaccel and |
| * hwaccel_context are set and the hwaccel private data in AVCodecInternal |
| * is allocated. |
| */ |
| int (*init)(AVCodecContext *avctx); |
| |
| /** |
| * Uninitialize the hwaccel private data. |
| * |
| * This will be called from get_format() or avcodec_close(), after hwaccel |
| * and hwaccel_context are already uninitialized. |
| */ |
| int (*uninit)(AVCodecContext *avctx); |
| |
| /** |
| * Size of the private data to allocate in |
| * AVCodecInternal.hwaccel_priv_data. |
| */ |
| int priv_data_size; |
| } AVHWAccel; |
| |
| /** |
| * @defgroup lavc_picture AVPicture |
| * |
| * Functions for working with AVPicture |
| * @{ |
| */ |
| |
| /** |
| * four components are given, that's all. |
| * the last component is alpha |
| */ |
| typedef struct AVPicture { |
| uint8_t *data[AV_NUM_DATA_POINTERS]; |
| int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line |
| } AVPicture; |
| |
| /** |
| * @} |
| */ |
| |
| #define AVPALETTE_SIZE 1024 |
| #define AVPALETTE_COUNT 256 |
| |
| 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, |
| }; |
| |
| #define AV_SUBTITLE_FLAG_FORCED 0x00000001 |
| |
| 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; |
| int flags; |
| } 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; |
| |
| /** |
| * 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(const 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); |
| |
| /** |
| * Register the codec codec and initialize libavcodec. |
| * |
| * @warning either this function or avcodec_register_all() must be called |
| * before any other libavcodec functions. |
| * |
| * @see avcodec_register_all() |
| */ |
| void avcodec_register(AVCodec *codec); |
| |
| /** |
| * 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); |
| |
| /** |
| * Allocate an AVCodecContext and set its fields to default values. The |
| * resulting struct should be freed with avcodec_free_context(). |
| * |
| * @param codec if non-NULL, allocate private data and initialize defaults |
| * for the given codec. It is illegal to then call avcodec_open2() |
| * with a different codec. |
| * If NULL, then the codec-specific defaults won't be initialized, |
| * which may result in suboptimal default settings (this is |
| * important mainly for encoders, e.g. libx264). |
| * |
| * @return An AVCodecContext filled with default values or NULL on failure. |
| * @see avcodec_get_context_defaults |
| */ |
| AVCodecContext *avcodec_alloc_context3(const AVCodec *codec); |
| |
| /** |
| * Free the codec context and everything associated with it and write NULL to |
| * the provided pointer. |
| */ |
| void avcodec_free_context(AVCodecContext **avctx); |
| |
| /** |
| * Set the fields of the given AVCodecContext to default values corresponding |
| * to the given codec (defaults may be codec-dependent). |
| * |
| * Do not call this function if a non-NULL codec has been passed |
| * to avcodec_alloc_context3() that allocated this AVCodecContext. |
| * If codec is non-NULL, it is illegal to call avcodec_open2() with a |
| * different codec on this AVCodecContext. |
| */ |
| int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec); |
| |
| /** |
| * Get the AVClass for AVCodecContext. It can be used in combination with |
| * AV_OPT_SEARCH_FAKE_OBJ for examining options. |
| * |
| * @see av_opt_find(). |
| */ |
| const AVClass *avcodec_get_class(void); |
| |
| /** |
| * 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_open2() before you |
| * can use this AVCodecContext to decode/encode video/audio data. |
| * |
| * @param dest target codec context, should be initialized with |
| * avcodec_alloc_context3(), but otherwise uninitialized |
| * @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); |
| |
| #if FF_API_AVFRAME_LAVC |
| /** |
| * @deprecated use av_frame_alloc() |
| */ |
| attribute_deprecated |
| AVFrame *avcodec_alloc_frame(void); |
| |
| /** |
| * Set the fields of the given AVFrame to default values. |
| * |
| * @param frame The AVFrame of which the fields should be set to default values. |
| * |
| * @deprecated use av_frame_unref() |
| */ |
| attribute_deprecated |
| void avcodec_get_frame_defaults(AVFrame *frame); |
| |
| /** |
| * Free the frame and any dynamically allocated objects in it, |
| * e.g. extended_data. |
| * |
| * @param frame frame to be freed. The pointer will be set to NULL. |
| * |
| * @warning this function does NOT free the data buffers themselves |
| * (it does not know how, since they might have been allocated with |
| * a custom get_buffer()). |
| * |
| * @deprecated use av_frame_free() |
| */ |
| attribute_deprecated |
| void avcodec_free_frame(AVFrame **frame); |
| #endif |
| |
| /** |
| * Initialize the AVCodecContext to use the given AVCodec. Prior to using this |
| * function the context has to be allocated with avcodec_alloc_context3(). |
| * |
| * 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(AV_CODEC_ID_H264); |
| * if (!codec) |
| * exit(1); |
| * |
| * context = avcodec_alloc_context3(codec); |
| * |
| * if (avcodec_open2(context, codec, opts) < 0) |
| * exit(1); |
| * @endcode |
| * |
| * @param avctx The context to initialize. |
| * @param codec The codec to open this context for. If a non-NULL codec has been |
| * previously passed to avcodec_alloc_context3() or |
| * avcodec_get_context_defaults3() for this context, then this |
| * parameter MUST be either NULL or equal to the previously passed |
| * codec. |
| * @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, const AVCodec *codec, AVDictionary **options); |
| |
| /** |
| * Close a given AVCodecContext and free all the data associated with it |
| * (but not the AVCodecContext itself). |
| * |
| * Calling this function on an AVCodecContext that hasn't been opened will free |
| * the codec-specific data allocated in avcodec_alloc_context3() / |
| * avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will |
| * do nothing. |
| */ |
| int avcodec_close(AVCodecContext *avctx); |
| |
| /** |
| * Free all allocated data in the given subtitle struct. |
| * |
| * @param sub AVSubtitle to free. |
| */ |
| void avsubtitle_free(AVSubtitle *sub); |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @addtogroup lavc_packet |
| * @{ |
| */ |
| |
| #if FF_API_DESTRUCT_PACKET |
| /** |
| * Default packet destructor. |
| * @deprecated use the AVBuffer API instead |
| */ |
| attribute_deprecated |
| void av_destruct_packet(AVPacket *pkt); |
| #endif |
| |
| /** |
| * Initialize optional fields of a packet with default values. |
| * |
| * Note, this does not touch the data and size members, which have to be |
| * initialized separately. |
| * |
| * @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); |
| |
| /** |
| * Initialize a reference-counted packet from av_malloc()ed data. |
| * |
| * @param pkt packet to be initialized. This function will set the data, size, |
| * buf and destruct fields, all others are left untouched. |
| * @param data Data allocated by av_malloc() to be used as packet data. If this |
| * function returns successfully, the data is owned by the underlying AVBuffer. |
| * The caller may not access the data through other means. |
| * @param size size of data in bytes, without the padding. I.e. the full buffer |
| * size is assumed to be size + FF_INPUT_BUFFER_PADDING_SIZE. |
| * |
| * @return 0 on success, a negative AVERROR on error |
| */ |
| int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size); |
| |
| /** |
| * @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); |
| |
| /** |
| * Shrink the already allocated side data buffer |
| * |
| * @param pkt packet |
| * @param type side information type |
| * @param size new side information size |
| * @return 0 on success, < 0 on failure |
| */ |
| int av_packet_shrink_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); |
| |
| /** |
| * Convenience function to free all the side data stored. |
| * All the other fields stay untouched. |
| * |
| * @param pkt packet |
| */ |
| void av_packet_free_side_data(AVPacket *pkt); |
| |
| /** |
| * Setup a new reference to the data described by a given packet |
| * |
| * If src is reference-counted, setup dst as a new reference to the |
| * buffer in src. Otherwise allocate a new buffer in dst and copy the |
| * data from src into it. |
| * |
| * All the other fields are copied from src. |
| * |
| * @see av_packet_unref |
| * |
| * @param dst Destination packet |
| * @param src Source packet |
| * |
| * @return 0 on success, a negative AVERROR on error. |
| */ |
| int av_packet_ref(AVPacket *dst, AVPacket *src); |
| |
| /** |
| * Wipe the packet. |
| * |
| * Unreference the buffer referenced by the packet and reset the |
| * remaining packet fields to their default values. |
| * |
| * @param pkt The packet to be unreferenced. |
| */ |
| void av_packet_unref(AVPacket *pkt); |
| |
| /** |
| * Move every field in src to dst and reset src. |
| * |
| * @see av_packet_unref |
| * |
| * @param src Source packet, will be reset |
| * @param dst Destination packet |
| */ |
| void av_packet_move_ref(AVPacket *dst, AVPacket *src); |
| |
| /** |
| * Copy only "properties" fields from src to dst. |
| * |
| * Properties for the purpose of this function are all the fields |
| * beside those related to the packet data (buf, data, size) |
| * |
| * @param dst Destination packet |
| * @param src Source packet |
| * |
| * @return 0 on success AVERROR on failure. |
| * |
| */ |
| int av_packet_copy_props(AVPacket *dst, const AVPacket *src); |
| |
| /** |
| * Convert valid timing fields (timestamps / durations) in a packet from one |
| * timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be |
| * ignored. |
| * |
| * @param pkt packet on which the conversion will be performed |
| * @param tb_src source timebase, in which the timing fields in pkt are |
| * expressed |
| * @param tb_dst destination timebase, to which the timing fields will be |
| * converted |
| */ |
| void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst); |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @addtogroup lavc_decoding |
| * @{ |
| */ |
| |
| /** |
| * Find a registered decoder with a matching codec ID. |
| * |
| * @param id AVCodecID of the requested decoder |
| * @return A decoder if one was found, NULL otherwise. |
| */ |
| AVCodec *avcodec_find_decoder(enum AVCodecID 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); |
| |
| #if FF_API_GET_BUFFER |
| attribute_deprecated int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic); |
| attribute_deprecated void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic); |
| attribute_deprecated int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic); |
| #endif |
| |
| /** |
| * The default callback for AVCodecContext.get_buffer2(). It is made public so |
| * it can be called by custom get_buffer2() implementations for decoders without |
| * CODEC_CAP_DR1 set. |
| */ |
| int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags); |
| |
| #if FF_API_EMU_EDGE |
| /** |
| * 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. |
| * |
| * @deprecated CODEC_FLAG_EMU_EDGE is deprecated, so this function is no longer |
| * needed |
| */ |
| attribute_deprecated |
| unsigned avcodec_get_edge_width(void); |
| #endif |
| |
| /** |
| * 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. |
| */ |
| 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. |
| */ |
| void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, |
| int linesize_align[AV_NUM_DATA_POINTERS]); |
| |
| /** |
| * Decode the audio frame of size avpkt->size from avpkt->data into frame. |
| * |
| * Some decoders may support multiple frames in a single AVPacket. Such |
| * decoders would then just decode the first frame and the return value would be |
| * less than the packet size. In this case, avcodec_decode_audio4 has to be |
| * called again with an AVPacket containing the remaining data in order to |
| * decode the second frame, etc... Even if no frames are returned, the packet |
| * needs to be fed to the decoder with remaining data until it is completely |
| * consumed or an error occurs. |
| * |
| * Some decoders (those marked with CODEC_CAP_DELAY) have a delay between input |
| * and output. This means that for some packets they will not immediately |
| * produce decoded output and need to be flushed at the end of decoding to get |
| * all the decoded data. Flushing is done by calling this function with packets |
| * with avpkt->data set to NULL and avpkt->size set to 0 until it stops |
| * returning samples. It is safe to flush even those decoders that are not |
| * marked with CODEC_CAP_DELAY, then no samples will be returned. |
| * |
| * @warning The input buffer, avpkt->data 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. |
| * |
| * @param avctx the codec context |
| * @param[out] frame The AVFrame in which to store decoded audio samples. |
| * The decoder will allocate a buffer for the decoded frame by |
| * calling the AVCodecContext.get_buffer2() callback. |
| * When AVCodecContext.refcounted_frames is set to 1, the frame is |
| * reference counted and the returned reference belongs to the |
| * caller. The caller must release the frame using av_frame_unref() |
| * when the frame is no longer needed. The caller may safely write |
| * to the frame if av_frame_is_writable() returns 1. |
| * When AVCodecContext.refcounted_frames is set to 0, the returned |
| * reference belongs to the decoder and is valid only until the |
| * next call to this function or until closing or flushing the |
| * decoder. The caller may not write to it. |
| * @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is |
| * non-zero. Note that this field being set to zero |
| * does not mean that an error has occurred. For |
| * decoders with CODEC_CAP_DELAY set, no given decode |
| * call is guaranteed to produce a frame. |
| * @param[in] avpkt The input AVPacket containing the input buffer. |
| * At least avpkt->data and avpkt->size should be set. Some |
| * decoders might also require additional fields to be set. |
| * @return A negative error code is returned if an error occurred during |
| * decoding, otherwise the number of bytes consumed from the input |
| * AVPacket is returned. |
| */ |
| int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, |
| int *got_frame_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 Codecs which have the CODEC_CAP_DELAY capability set 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 av_frame_alloc() to get an AVFrame. The codec will |
| * allocate memory for the actual bitmap by calling the |
| * AVCodecContext.get_buffer2() callback. |
| * When AVCodecContext.refcounted_frames is set to 1, the frame is |
| * reference counted and the returned reference belongs to the |
| * caller. The caller must release the frame using av_frame_unref() |
| * when the frame is no longer needed. The caller may safely write |
| * to the frame if av_frame_is_writable() returns 1. |
| * When AVCodecContext.refcounted_frames is set to 0, the returned |
| * reference belongs to the decoder and is valid only until the |
| * next call to this function or until closing or flushing the |
| * decoder. The caller may not write to it. |
| * |
| * @param[in] avpkt The input AVpacket containing the input buffer. |
| * 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); |
| |
| /** |
| * @defgroup lavc_parsing Frame parsing |
| * @{ |
| */ |
| |
| enum AVPictureStructure { |
| AV_PICTURE_STRUCTURE_UNKNOWN, //< unknown |
| AV_PICTURE_STRUCTURE_TOP_FIELD, //< coded as top field |
| AV_PICTURE_STRUCTURE_BOTTOM_FIELD, //< coded as bottom field |
| AV_PICTURE_STRUCTURE_FRAME, //< coded as frame |
| }; |
| |
| 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; |
| |
| /** |
| * Duration of the current frame. |
| * For audio, this is in units of 1 / AVCodecContext.sample_rate. |
| * For all other types, this is in units of AVCodecContext.time_base. |
| */ |
| int duration; |
| |
| enum AVFieldOrder field_order; |
| |
| /** |
| * Indicate whether a picture is coded as a frame, top field or bottom field. |
| * |
| * For example, H.264 field_pic_flag equal to 0 corresponds to |
| * AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag |
| * equal to 1 and bottom_field_flag equal to 0 corresponds to |
| * AV_PICTURE_STRUCTURE_TOP_FIELD. |
| */ |
| enum AVPictureStructure picture_structure; |
| |
| /** |
| * Picture number incremented in presentation or output order. |
| * This field may be reinitialized at the first picture of a new sequence. |
| * |
| * For example, this corresponds to H.264 PicOrderCnt. |
| */ |
| int output_picture_number; |
| } 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(const 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, |
|