*
*/
+/**
+ * @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.
* 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 CodecID {
- CODEC_ID_NONE,
+enum AVCodecID {
+ AV_CODEC_ID_NONE,
/* video codecs */
- CODEC_ID_MPEG1VIDEO,
- CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
- CODEC_ID_MPEG2VIDEO_XVMC,
- CODEC_ID_H261,
- CODEC_ID_H263,
- CODEC_ID_RV10,
- CODEC_ID_RV20,
- CODEC_ID_MJPEG,
- CODEC_ID_MJPEGB,
- CODEC_ID_LJPEG,
- CODEC_ID_SP5X,
- CODEC_ID_JPEGLS,
- CODEC_ID_MPEG4,
- CODEC_ID_RAWVIDEO,
- CODEC_ID_MSMPEG4V1,
- CODEC_ID_MSMPEG4V2,
- CODEC_ID_MSMPEG4V3,
- CODEC_ID_WMV1,
- CODEC_ID_WMV2,
- CODEC_ID_H263P,
- CODEC_ID_H263I,
- CODEC_ID_FLV1,
- CODEC_ID_SVQ1,
- CODEC_ID_SVQ3,
- CODEC_ID_DVVIDEO,
- CODEC_ID_HUFFYUV,
- CODEC_ID_CYUV,
- CODEC_ID_H264,
- CODEC_ID_INDEO3,
- CODEC_ID_VP3,
- CODEC_ID_THEORA,
- CODEC_ID_ASV1,
- CODEC_ID_ASV2,
- CODEC_ID_FFV1,
- CODEC_ID_4XM,
- CODEC_ID_VCR1,
- CODEC_ID_CLJR,
- CODEC_ID_MDEC,
- CODEC_ID_ROQ,
- CODEC_ID_INTERPLAY_VIDEO,
- CODEC_ID_XAN_WC3,
- CODEC_ID_XAN_WC4,
- CODEC_ID_RPZA,
- CODEC_ID_CINEPAK,
- CODEC_ID_WS_VQA,
- CODEC_ID_MSRLE,
- CODEC_ID_MSVIDEO1,
- CODEC_ID_IDCIN,
- CODEC_ID_8BPS,
- CODEC_ID_SMC,
- CODEC_ID_FLIC,
- CODEC_ID_TRUEMOTION1,
- CODEC_ID_VMDVIDEO,
- CODEC_ID_MSZH,
- CODEC_ID_ZLIB,
- CODEC_ID_QTRLE,
- CODEC_ID_SNOW,
- CODEC_ID_TSCC,
- CODEC_ID_ULTI,
- CODEC_ID_QDRAW,
- CODEC_ID_VIXL,
- CODEC_ID_QPEG,
- CODEC_ID_PNG,
- CODEC_ID_PPM,
- CODEC_ID_PBM,
- CODEC_ID_PGM,
- CODEC_ID_PGMYUV,
- CODEC_ID_PAM,
- CODEC_ID_FFVHUFF,
- CODEC_ID_RV30,
- CODEC_ID_RV40,
- CODEC_ID_VC1,
- CODEC_ID_WMV3,
- CODEC_ID_LOCO,
- CODEC_ID_WNV1,
- CODEC_ID_AASC,
- CODEC_ID_INDEO2,
- CODEC_ID_FRAPS,
- CODEC_ID_TRUEMOTION2,
- CODEC_ID_BMP,
- CODEC_ID_CSCD,
- CODEC_ID_MMVIDEO,
- CODEC_ID_ZMBV,
- CODEC_ID_AVS,
- CODEC_ID_SMACKVIDEO,
- CODEC_ID_NUV,
- CODEC_ID_KMVC,
- CODEC_ID_FLASHSV,
- CODEC_ID_CAVS,
- CODEC_ID_JPEG2000,
- CODEC_ID_VMNC,
- CODEC_ID_VP5,
- CODEC_ID_VP6,
- CODEC_ID_VP6F,
- CODEC_ID_TARGA,
- CODEC_ID_DSICINVIDEO,
- CODEC_ID_TIERTEXSEQVIDEO,
- CODEC_ID_TIFF,
- CODEC_ID_GIF,
- CODEC_ID_DXA,
- CODEC_ID_DNXHD,
- CODEC_ID_THP,
- CODEC_ID_SGI,
- CODEC_ID_C93,
- CODEC_ID_BETHSOFTVID,
- CODEC_ID_PTX,
- CODEC_ID_TXD,
- CODEC_ID_VP6A,
- CODEC_ID_AMV,
- CODEC_ID_VB,
- CODEC_ID_PCX,
- CODEC_ID_SUNRAST,
- CODEC_ID_INDEO4,
- CODEC_ID_INDEO5,
- CODEC_ID_MIMIC,
- CODEC_ID_RL2,
- CODEC_ID_ESCAPE124,
- CODEC_ID_DIRAC,
- CODEC_ID_BFI,
- CODEC_ID_CMV,
- CODEC_ID_MOTIONPIXELS,
- CODEC_ID_TGV,
- CODEC_ID_TGQ,
- CODEC_ID_TQI,
- CODEC_ID_AURA,
- CODEC_ID_AURA2,
- CODEC_ID_V210X,
- CODEC_ID_TMV,
- CODEC_ID_V210,
- CODEC_ID_DPX,
- CODEC_ID_MAD,
- CODEC_ID_FRWU,
- CODEC_ID_FLASHSV2,
- CODEC_ID_CDGRAPHICS,
- CODEC_ID_R210,
- CODEC_ID_ANM,
- CODEC_ID_BINKVIDEO,
- CODEC_ID_IFF_ILBM,
- CODEC_ID_IFF_BYTERUN1,
- CODEC_ID_KGV1,
- CODEC_ID_YOP,
- CODEC_ID_VP8,
- CODEC_ID_PICTOR,
- CODEC_ID_ANSI,
- CODEC_ID_A64_MULTI,
- CODEC_ID_A64_MULTI5,
- CODEC_ID_R10K,
- CODEC_ID_MXPEG,
- CODEC_ID_LAGARITH,
- CODEC_ID_PRORES,
- CODEC_ID_JV,
- CODEC_ID_DFA,
- CODEC_ID_WMV3IMAGE,
- CODEC_ID_VC1IMAGE,
- CODEC_ID_UTVIDEO,
- CODEC_ID_BMV_VIDEO,
- CODEC_ID_VBLE,
- CODEC_ID_DXTORY,
- CODEC_ID_V410,
- CODEC_ID_XWD,
- CODEC_ID_CDXL,
- CODEC_ID_XBM,
+ AV_CODEC_ID_MPEG1VIDEO,
+ AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
+ AV_CODEC_ID_MPEG2VIDEO_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_SNOW,
+ 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,
/* various PCM "codecs" */
- CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
- CODEC_ID_PCM_S16LE = 0x10000,
- CODEC_ID_PCM_S16BE,
- CODEC_ID_PCM_U16LE,
- CODEC_ID_PCM_U16BE,
- CODEC_ID_PCM_S8,
- CODEC_ID_PCM_U8,
- CODEC_ID_PCM_MULAW,
- CODEC_ID_PCM_ALAW,
- CODEC_ID_PCM_S32LE,
- CODEC_ID_PCM_S32BE,
- CODEC_ID_PCM_U32LE,
- CODEC_ID_PCM_U32BE,
- CODEC_ID_PCM_S24LE,
- CODEC_ID_PCM_S24BE,
- CODEC_ID_PCM_U24LE,
- CODEC_ID_PCM_U24BE,
- CODEC_ID_PCM_S24DAUD,
- CODEC_ID_PCM_ZORK,
- CODEC_ID_PCM_S16LE_PLANAR,
- CODEC_ID_PCM_DVD,
- CODEC_ID_PCM_F32BE,
- CODEC_ID_PCM_F32LE,
- CODEC_ID_PCM_F64BE,
- CODEC_ID_PCM_F64LE,
- CODEC_ID_PCM_BLURAY,
- CODEC_ID_PCM_LXF,
- CODEC_ID_S302M,
- CODEC_ID_PCM_S8_PLANAR,
+ 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,
/* various ADPCM codecs */
- CODEC_ID_ADPCM_IMA_QT = 0x11000,
- CODEC_ID_ADPCM_IMA_WAV,
- CODEC_ID_ADPCM_IMA_DK3,
- CODEC_ID_ADPCM_IMA_DK4,
- CODEC_ID_ADPCM_IMA_WS,
- CODEC_ID_ADPCM_IMA_SMJPEG,
- CODEC_ID_ADPCM_MS,
- CODEC_ID_ADPCM_4XM,
- CODEC_ID_ADPCM_XA,
- CODEC_ID_ADPCM_ADX,
- CODEC_ID_ADPCM_EA,
- CODEC_ID_ADPCM_G726,
- CODEC_ID_ADPCM_CT,
- CODEC_ID_ADPCM_SWF,
- CODEC_ID_ADPCM_YAMAHA,
- CODEC_ID_ADPCM_SBPRO_4,
- CODEC_ID_ADPCM_SBPRO_3,
- CODEC_ID_ADPCM_SBPRO_2,
- CODEC_ID_ADPCM_THP,
- CODEC_ID_ADPCM_IMA_AMV,
- CODEC_ID_ADPCM_EA_R1,
- CODEC_ID_ADPCM_EA_R3,
- CODEC_ID_ADPCM_EA_R2,
- CODEC_ID_ADPCM_IMA_EA_SEAD,
- CODEC_ID_ADPCM_IMA_EA_EACS,
- CODEC_ID_ADPCM_EA_XAS,
- CODEC_ID_ADPCM_EA_MAXIS_XA,
- CODEC_ID_ADPCM_IMA_ISS,
- CODEC_ID_ADPCM_G722,
- CODEC_ID_ADPCM_IMA_APC,
+ 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,
/* AMR */
- CODEC_ID_AMR_NB = 0x12000,
- CODEC_ID_AMR_WB,
+ AV_CODEC_ID_AMR_NB = 0x12000,
+ AV_CODEC_ID_AMR_WB,
/* RealAudio codecs*/
- CODEC_ID_RA_144 = 0x13000,
- CODEC_ID_RA_288,
+ AV_CODEC_ID_RA_144 = 0x13000,
+ AV_CODEC_ID_RA_288,
/* various DPCM codecs */
- CODEC_ID_ROQ_DPCM = 0x14000,
- CODEC_ID_INTERPLAY_DPCM,
- CODEC_ID_XAN_DPCM,
- CODEC_ID_SOL_DPCM,
+ AV_CODEC_ID_ROQ_DPCM = 0x14000,
+ AV_CODEC_ID_INTERPLAY_DPCM,
+ AV_CODEC_ID_XAN_DPCM,
+ AV_CODEC_ID_SOL_DPCM,
/* audio codecs */
- CODEC_ID_MP2 = 0x15000,
- CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
- CODEC_ID_AAC,
- CODEC_ID_AC3,
- CODEC_ID_DTS,
- CODEC_ID_VORBIS,
- CODEC_ID_DVAUDIO,
- CODEC_ID_WMAV1,
- CODEC_ID_WMAV2,
- CODEC_ID_MACE3,
- CODEC_ID_MACE6,
- CODEC_ID_VMDAUDIO,
- CODEC_ID_FLAC,
- CODEC_ID_MP3ADU,
- CODEC_ID_MP3ON4,
- CODEC_ID_SHORTEN,
- CODEC_ID_ALAC,
- CODEC_ID_WESTWOOD_SND1,
- CODEC_ID_GSM, ///< as in Berlin toast format
- CODEC_ID_QDM2,
- CODEC_ID_COOK,
- CODEC_ID_TRUESPEECH,
- CODEC_ID_TTA,
- CODEC_ID_SMACKAUDIO,
- CODEC_ID_QCELP,
- CODEC_ID_WAVPACK,
- CODEC_ID_DSICINAUDIO,
- CODEC_ID_IMC,
- CODEC_ID_MUSEPACK7,
- CODEC_ID_MLP,
- CODEC_ID_GSM_MS, /* as found in WAV */
- CODEC_ID_ATRAC3,
- CODEC_ID_VOXWARE,
- CODEC_ID_APE,
- CODEC_ID_NELLYMOSER,
- CODEC_ID_MUSEPACK8,
- CODEC_ID_SPEEX,
- CODEC_ID_WMAVOICE,
- CODEC_ID_WMAPRO,
- CODEC_ID_WMALOSSLESS,
- CODEC_ID_ATRAC3P,
- CODEC_ID_EAC3,
- CODEC_ID_SIPR,
- CODEC_ID_MP1,
- CODEC_ID_TWINVQ,
- CODEC_ID_TRUEHD,
- CODEC_ID_MP4ALS,
- CODEC_ID_ATRAC1,
- CODEC_ID_BINKAUDIO_RDFT,
- CODEC_ID_BINKAUDIO_DCT,
- CODEC_ID_AAC_LATM,
- CODEC_ID_QDMC,
- CODEC_ID_CELT,
- CODEC_ID_G723_1,
- CODEC_ID_G729,
- CODEC_ID_8SVX_EXP,
- CODEC_ID_8SVX_FIB,
- CODEC_ID_BMV_AUDIO,
+ 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,
+ AV_CODEC_ID_VOXWARE,
+ 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,
/* subtitle codecs */
- CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
- CODEC_ID_DVD_SUBTITLE = 0x17000,
- CODEC_ID_DVB_SUBTITLE,
- CODEC_ID_TEXT, ///< raw UTF-8 text
- CODEC_ID_XSUB,
- CODEC_ID_SSA,
- CODEC_ID_MOV_TEXT,
- CODEC_ID_HDMV_PGS_SUBTITLE,
- CODEC_ID_DVB_TELETEXT,
- CODEC_ID_SRT,
+ 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) */
- CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
- CODEC_ID_TTF = 0x18000,
+ AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
+ AV_CODEC_ID_TTF = 0x18000,
- CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
+ AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
- CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
+ AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
* stream (only used by libavformat) */
- CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
+ AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
* stream (only used by libavformat) */
- CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information.
+ AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information.
+
+#if FF_API_CODEC_ID
+#include "old_codec_ids.h"
+#endif
};
+#if FF_API_CODEC_ID
+#define CodecID AVCodecID
+#endif
+
+/**
+ * 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)
+
#if FF_API_OLD_DECODE_AUDIO
/* in bytes */
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
#endif
/**
+ * @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>
#define FF_INPUT_BUFFER_PADDING_SIZE 8
/**
+ * @ingroup lavc_encoding
* minimum encoding buffer size
* Used to avoid some checks during header writing.
*/
/**
+ * @ingroup lavc_encoding
* motion estimation type.
*/
enum Motion_Est_ID {
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
+ AVDISCARD_NONE =-16, ///< discard nothing
+ AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
+ AVDISCARD_NONREF = 8, ///< discard all non reference
+ AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
+ AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
+ AVDISCARD_ALL = 48, ///< discard all
};
enum AVColorPrimaries{
- AVCOL_PRI_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
- AVCOL_PRI_UNSPECIFIED=2,
- AVCOL_PRI_BT470M =4,
- AVCOL_PRI_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
- AVCOL_PRI_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
- AVCOL_PRI_SMPTE240M =7, ///< functionally identical to above
- AVCOL_PRI_FILM =8,
- AVCOL_PRI_NB , ///< Not part of ABI
+ AVCOL_PRI_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
+ AVCOL_PRI_UNSPECIFIED = 2,
+ AVCOL_PRI_BT470M = 4,
+ AVCOL_PRI_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
+ AVCOL_PRI_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
+ AVCOL_PRI_SMPTE240M = 7, ///< functionally identical to above
+ AVCOL_PRI_FILM = 8,
+ AVCOL_PRI_NB , ///< Not part of ABI
};
enum AVColorTransferCharacteristic{
- AVCOL_TRC_BT709 =1, ///< also ITU-R BT1361
- AVCOL_TRC_UNSPECIFIED=2,
- AVCOL_TRC_GAMMA22 =4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
- AVCOL_TRC_GAMMA28 =5, ///< also ITU-R BT470BG
- AVCOL_TRC_NB , ///< Not part of ABI
+ AVCOL_TRC_BT709 = 1, ///< also ITU-R BT1361
+ AVCOL_TRC_UNSPECIFIED = 2,
+ AVCOL_TRC_GAMMA22 = 4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
+ AVCOL_TRC_GAMMA28 = 5, ///< also ITU-R BT470BG
+ AVCOL_TRC_SMPTE240M = 7,
+ AVCOL_TRC_NB , ///< Not part of ABI
};
enum AVColorSpace{
- AVCOL_SPC_RGB =0,
- AVCOL_SPC_BT709 =1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
- AVCOL_SPC_UNSPECIFIED=2,
- AVCOL_SPC_FCC =4,
- AVCOL_SPC_BT470BG =5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
- AVCOL_SPC_SMPTE170M =6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
- AVCOL_SPC_SMPTE240M =7,
- AVCOL_SPC_NB , ///< Not part of ABI
+ AVCOL_SPC_RGB = 0,
+ AVCOL_SPC_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
+ AVCOL_SPC_UNSPECIFIED = 2,
+ AVCOL_SPC_FCC = 4,
+ AVCOL_SPC_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
+ AVCOL_SPC_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
+ AVCOL_SPC_SMPTE240M = 7,
+ AVCOL_SPC_YCOCG = 8, ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
+ AVCOL_SPC_NB , ///< Not part of ABI
};
enum AVColorRange{
- AVCOL_RANGE_UNSPECIFIED=0,
- AVCOL_RANGE_MPEG =1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
- AVCOL_RANGE_JPEG =2, ///< the normal 2^n-1 "JPEG" YUV ranges
- AVCOL_RANGE_NB , ///< Not part of ABI
+ AVCOL_RANGE_UNSPECIFIED = 0,
+ AVCOL_RANGE_MPEG = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
+ AVCOL_RANGE_JPEG = 2, ///< the normal 2^n-1 "JPEG" YUV ranges
+ AVCOL_RANGE_NB , ///< Not part of ABI
};
/**
* X X 5 6 X 0 is undefined/unknown position
*/
enum AVChromaLocation{
- AVCHROMA_LOC_UNSPECIFIED=0,
- AVCHROMA_LOC_LEFT =1, ///< mpeg2/4, h264 default
- AVCHROMA_LOC_CENTER =2, ///< mpeg1, jpeg, h263
- AVCHROMA_LOC_TOPLEFT =3, ///< DV
- AVCHROMA_LOC_TOP =4,
- AVCHROMA_LOC_BOTTOMLEFT =5,
- AVCHROMA_LOC_BOTTOM =6,
- AVCHROMA_LOC_NB , ///< Not part of ABI
+ AVCHROMA_LOC_UNSPECIFIED = 0,
+ AVCHROMA_LOC_LEFT = 1, ///< mpeg2/4, h264 default
+ AVCHROMA_LOC_CENTER = 2, ///< mpeg1, jpeg, h263
+ AVCHROMA_LOC_TOPLEFT = 3, ///< DV
+ AVCHROMA_LOC_TOP = 4,
+ AVCHROMA_LOC_BOTTOMLEFT = 5,
+ AVCHROMA_LOC_BOTTOM = 6,
+ AVCHROMA_LOC_NB , ///< Not part of ABI
};
enum AVAudioServiceType {
AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI
};
+/**
+ * @ingroup lavc_encoding
+ */
typedef struct RcOverride{
int start_frame;
int end_frame;
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
+/**
+ * @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 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 destruct field.
+ * If it is set, the packet data is dynamically allocated and is valid
+ * indefinitely until av_free_packet() is called (which in turn calls the
+ * destruct callback to free the data). If destruct is not 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 {
/**
* Presentation timestamp in AVStream->time_base units; the time at which
#define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe
#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
-/**
- * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
- * 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
- */
-
-/**
- * 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:
- * 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
- */
-
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,
};
+/**
+ * @}
+ */
/**
* Audio Video Frame.
* extended_data must be used by the decoder in order to access all
* channels.
*
- * encoding: unused
+ * encoding: set by user
* decoding: set by AVCodecContext.get_buffer()
*/
uint8_t **extended_data;
/**
* format of the frame, -1 if unknown or unset
- * Values correspond to enum PixelFormat for video frames,
+ * Values correspond to enum AVPixelFormat for video frames,
* enum AVSampleFormat for audio)
* - encoding: unused
* - decoding: Read by user.
uint8_t *base[AV_NUM_DATA_POINTERS];
/**
- * sample aspect ratio for the video frame, 0/1 if unknown\unspecified
+ * sample aspect ratio for the video frame, 0/1 if unknown/unspecified
* - encoding: unused
* - decoding: Read by user.
*/
* - decoding: Set by libavcodec.
*/
uint8_t motion_subsample_log2;
+
+ /**
+ * Sample rate of the audio data.
+ *
+ * - encoding: unused
+ * - decoding: set by get_buffer()
+ */
+ int sample_rate;
+
+ /**
+ * Channel layout of the audio data.
+ *
+ * - encoding: unused
+ * - decoding: set by get_buffer()
+ */
+ uint64_t channel_layout;
} AVFrame;
struct AVCodecInternal;
int log_level_offset;
enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
- struct AVCodec *codec;
+ const struct AVCodec *codec;
char codec_name[32];
- enum CodecID codec_id; /* see CODEC_ID_xxx */
+ enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
/**
* fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
int ticks_per_frame;
/**
- * Encoder delay.
+ * Codec delay.
*
* Video:
* Number of frames the decoded output will be delayed relative to the
* encoded input.
*
* Audio:
- * Number of "priming" samples added to the beginning of the stream
- * during encoding. The decoded output will be delayed by this many
- * samples relative to the input to the encoder. Note that this field is
- * purely informational and does not directly affect the pts output by
- * the encoder, which should always be based on the actual presentation
- * time, including any delay.
+ * For encoding, this is the number of "priming" samples added to the
+ * beginning of the stream. The decoded output will be delayed by this
+ * many samples relative to the input to the encoder. Note that this
+ * field is purely informational and does not directly affect the pts
+ * output by the encoder, which should always be based on the actual
+ * presentation time, including any 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: unused
+ * - decoding: Set by libavcodec.
*/
int delay;
int width, height;
/**
- * Bitstream width / height, may be different from width/height if lowres enabled.
+ * Bitstream width / height, may be different from width/height.
* - encoding: unused
* - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
*/
int gop_size;
/**
- * Pixel format, see PIX_FMT_xxx.
+ * 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.
* - encoding: Set by user.
* - decoding: Set by user if known, overridden by libavcodec if known
*/
- enum PixelFormat pix_fmt;
+ enum AVPixelFormat pix_fmt;
/**
* Motion estimation algorithm used for video coding.
* - encoding: unused
* - decoding: Set by user, if not set the native format will be chosen.
*/
- enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
+ enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
/**
* maximum number of B-frames between non-B-frames
/* The following data should not be initialized. */
/**
- * Samples per packet, initialized when calling 'init'.
+ * 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;
#define FF_IDCT_INT 1
#define FF_IDCT_SIMPLE 2
#define FF_IDCT_SIMPLEMMX 3
+#if FF_API_LIBMPEG2
#define FF_IDCT_LIBMPEG2MMX 4
+#endif
+#if FF_API_MMI
#define FF_IDCT_MMI 5
+#endif
#define FF_IDCT_ARM 7
#define FF_IDCT_ALTIVEC 8
#define FF_IDCT_SH4 9
#define FF_IDCT_SIMPLEALPHA 23
#define FF_IDCT_BINK 24
+#if FF_API_DSP_MASK
/**
- * dsp_mask could be add used to disable unwanted CPU features
- * CPU features (i.e. MMX, SSE. ...)
- *
- * With the FORCE flag you may instead enable given CPU features.
- * (Dangerous: Usable in case of misdetection, improper usage however will
- * result into program crash.)
+ * Unused.
+ * @deprecated use av_set_cpu_flags_mask() instead.
*/
- unsigned dsp_mask;
+ attribute_deprecated unsigned dsp_mask;
+#endif
/**
* bits per sample/pixel from the demuxer (needed for huffyuv).
* - encoding: unused
* - decoding: Set by user.
*/
- int lowres;
+ attribute_deprecated int lowres;
/**
* the picture in the bitstream
/**
* Set by the client if its custom get_buffer() callback can be called
- * from another thread, which allows faster multithreaded decoding.
+ * 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.
#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_DTS 20
#define FF_PROFILE_DTS_ES 30
typedef struct AVCodecDefault AVCodecDefault;
+struct AVSubtitle;
+
/**
* AVCodec.
*/
*/
const char *long_name;
enum AVMediaType type;
- enum CodecID id;
+ 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 PixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
+ 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
- uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
+ attribute_deprecated uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
const AVClass *priv_class; ///< AVClass for the private context
const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
void (*init_static_data)(struct AVCodec *codec);
int (*init)(AVCodecContext *);
- int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
+ int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size,
+ const struct AVSubtitle *sub);
/**
* Encode data to an AVPacket.
*
/**
* Codec implemented by the hardware accelerator.
*
- * See CODEC_ID_xxx
+ * See AV_CODEC_ID_xxx
*/
- enum CodecID id;
+ enum AVCodecID id;
/**
* Supported pixel format.
*
* Only hardware accelerated formats are supported here.
*/
- enum PixelFormat pix_fmt;
+ enum AVPixelFormat pix_fmt;
/**
* Hardware accelerated codec capabilities.
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
int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line
} AVPicture;
+/**
+ * @}
+ */
+
#define AVPALETTE_SIZE 1024
#define AVPALETTE_COUNT 256
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
* struct.
*/
char *ass;
+ int flags;
} AVSubtitleRect;
typedef struct AVSubtitle {
int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
} AVSubtitle;
-/* packet functions */
+/**
+ * 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 can be deallocated by calling avcodec_close() on it followed
+ * by av_free().
+ *
+ * @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);
+
+/**
+ * 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);
+
+/**
+ * Allocate an AVFrame and set its fields to default values. The resulting
+ * struct must be freed using avcodec_free_frame().
+ *
+ * @return An AVFrame filled with default values or NULL on failure.
+ * @see avcodec_get_frame_defaults
+ */
+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.
+ */
+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()).
+ */
+void avcodec_free_frame(AVFrame **frame);
+
+/**
+ * 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);
+
+/**
+ * @}
+ */
/**
- * @deprecated use NULL instead
+ * @addtogroup lavc_packet
+ * @{
*/
-attribute_deprecated void av_destruct_packet_nofree(AVPacket *pkt);
/**
* Default packet destructor.
/**
* 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);
uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
int *size);
-/* resample.c */
-
-struct ReSampleContext;
-struct AVResampleContext;
-
-typedef struct ReSampleContext ReSampleContext;
-
/**
- * Initialize audio resampling context.
- *
- * @param output_channels number of output channels
- * @param input_channels number of input channels
- * @param output_rate output sample rate
- * @param input_rate input sample rate
- * @param sample_fmt_out requested output sample format
- * @param sample_fmt_in input sample format
- * @param filter_length length of each FIR filter in the filterbank relative to the cutoff frequency
- * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
- * @param linear if 1 then the used FIR filter will be linearly interpolated
- between the 2 closest, if 0 the closest will be used
- * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
- * @return allocated ReSampleContext, NULL if error occurred
+ * @}
*/
-ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
- int output_rate, int input_rate,
- enum AVSampleFormat sample_fmt_out,
- enum AVSampleFormat sample_fmt_in,
- int filter_length, int log2_phase_count,
- int linear, double cutoff);
-
-int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
/**
- * Free resample context.
- *
- * @param s a non-NULL pointer to a resample context previously
- * created with av_audio_resample_init()
+ * @addtogroup lavc_decoding
+ * @{
*/
-void audio_resample_close(ReSampleContext *s);
-
/**
- * Initialize an audio resampler.
- * Note, if either rate is not an integer then simply scale both rates up so they are.
- * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
- * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
- * @param linear If 1 then the used FIR filter will be linearly interpolated
- between the 2 closest, if 0 the closest will be used
- * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
+ * 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.
*/
-struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
+AVCodec *avcodec_find_decoder(enum AVCodecID id);
/**
- * Resample an array of samples using a previously configured context.
- * @param src an array of unconsumed samples
- * @param consumed the number of samples of src which have been consumed are returned here
- * @param src_size the number of unconsumed samples available
- * @param dst_size the amount of space in samples available in dst
- * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
- * @return the number of samples written in dst or -1 if an error occurred
+ * Find a registered decoder with the specified name.
+ *
+ * @param name name of the requested decoder
+ * @return A decoder if one was found, NULL otherwise.
*/
-int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
+AVCodec *avcodec_find_decoder_by_name(const char *name);
+int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
+void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
+int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
/**
- * Compensate samplerate/timestamp drift. The compensation is done by changing
- * the resampler parameters, so no audible clicks or similar distortions occur
- * @param compensation_distance distance in output samples over which the compensation should be performed
- * @param sample_delta number of output samples which should be output less
- *
- * example: av_resample_compensate(c, 10, 500)
- * here instead of 510 samples only 500 samples would be output
+ * 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.
*
- * note, due to rounding the actual compensation might be slightly different,
- * especially if the compensation_distance is large and the in_rate used during init is small
+ * @return Required padding in pixels.
*/
-void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
-void av_resample_close(struct AVResampleContext *c);
+unsigned avcodec_get_edge_width(void);
/**
- * Allocate memory for a picture. Call avpicture_free() to free it.
- *
- * @see avpicture_fill()
+ * 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.
*
- * @param picture the picture to be filled in
- * @param pix_fmt the format of the picture
- * @param width the width of the picture
- * @param height the height of the picture
- * @return zero if successful, a negative value if not
+ * May only be used if a codec with CODEC_CAP_DR1 has been opened.
+ * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
+ * according to avcodec_get_edge_width() before.
*/
-int avpicture_alloc(AVPicture *picture, enum PixelFormat pix_fmt, int width, int height);
+void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
/**
- * Free a picture previously allocated by avpicture_alloc().
- * The data buffer used by the AVPicture is freed, but the AVPicture structure
- * itself is not.
+ * 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].
*
- * @param picture the AVPicture to be freed
+ * May only be used if a codec with CODEC_CAP_DR1 has been opened.
+ * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
+ * according to avcodec_get_edge_width() before.
*/
-void avpicture_free(AVPicture *picture);
+void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
+ int linesize_align[AV_NUM_DATA_POINTERS]);
+#if FF_API_OLD_DECODE_AUDIO
/**
- * Fill in the AVPicture fields.
- * The fields of the given AVPicture are filled in by using the 'ptr' address
- * which points to the image data buffer. Depending on the specified picture
- * format, one or multiple image data pointers and line sizes will be set.
- * If a planar format is specified, several pointers will be set pointing to
- * the different picture planes and the line sizes of the different planes
- * will be stored in the lines_sizes array.
- * Call with ptr == NULL to get the required size for the ptr buffer.
+ * Wrapper function which calls avcodec_decode_audio4.
*
- * To allocate the buffer and fill in the AVPicture fields in one call,
- * use avpicture_alloc().
+ * @deprecated Use avcodec_decode_audio4 instead.
*
- * @param picture AVPicture whose fields are to be filled in
- * @param ptr Buffer which will contain or contains the actual image data
- * @param pix_fmt The format in which the picture data is stored.
- * @param width the width of the image in pixels
- * @param height the height of the image in pixels
- * @return size of the image data in bytes
- */
-int avpicture_fill(AVPicture *picture, uint8_t *ptr,
- enum PixelFormat pix_fmt, int width, int height);
-
-/**
- * Copy pixel data from an AVPicture into a buffer.
- * The data is stored compactly, without any gaps for alignment or padding
- * which may be applied by avpicture_fill().
+ * Decode the audio frame of size avpkt->size from avpkt->data into samples.
+ * Some decoders may support multiple frames in a single AVPacket, such
+ * decoders would then just decode the first frame. In this case,
+ * avcodec_decode_audio3 has to be called again with an AVPacket that contains
+ * the remaining data in order to decode the second frame etc.
+ * If no frame
+ * could be outputted, frame_size_ptr is zero. Otherwise, it is the
+ * decompressed frame size in bytes.
*
- * @see avpicture_get_size()
+ * @warning You must set frame_size_ptr to the allocated size of the
+ * output buffer before calling avcodec_decode_audio3().
*
- * @param[in] src AVPicture containing image data
- * @param[in] pix_fmt The format in which the picture data is stored.
- * @param[in] width the width of the image in pixels.
- * @param[in] height the height of the image in pixels.
- * @param[out] dest A buffer into which picture data will be copied.
- * @param[in] dest_size The size of 'dest'.
- * @return The number of bytes written to dest, or a negative value (error code) on error.
- */
-int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
- unsigned char *dest, int dest_size);
-
-/**
- * Calculate the size in bytes that a picture of the given width and height
- * would occupy if stored in the given picture format.
- * Note that this returns the size of a compact representation as generated
- * by avpicture_layout(), which can be smaller than the size required for e.g.
- * avpicture_fill().
+ * @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.
*
- * @param pix_fmt the given picture format
- * @param width the width of the image
- * @param height the height of the image
- * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
- */
-int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height);
-void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift);
-
-void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
-
-/**
- * Return a value representing the fourCC code associated to the
- * pixel format pix_fmt, or 0 if no associated fourCC code can be
- * found.
+ * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
+ * no overreading happens for damaged MPEG streams.
+ *
+ * @warning You must not provide a custom get_buffer() when using
+ * avcodec_decode_audio3(). Doing so will override it with
+ * avcodec_default_get_buffer. Use avcodec_decode_audio4() instead,
+ * which does allow the application to provide a custom get_buffer().
+ *
+ * @note You might have to align the input buffer avpkt->data and output buffer
+ * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
+ * necessary at all, on others it won't work at all if not aligned and on others
+ * it will work but it will have an impact on performance.
+ *
+ * In practice, avpkt->data should have 4 byte alignment at minimum and
+ * samples should be 16 byte aligned unless the CPU doesn't need it
+ * (AltiVec and SSE do).
+ *
+ * @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] samples the output buffer, sample type in avctx->sample_fmt
+ * If the sample format is planar, each channel plane will
+ * be the same size, with no padding between channels.
+ * @param[in,out] frame_size_ptr the output buffer size in bytes
+ * @param[in] avpkt The input AVPacket containing the input buffer.
+ * You can create such packet with av_init_packet() and by then setting
+ * data and size, some decoders might in addition need other fields.
+ * All decoders are designed to use the least fields possible though.
+ * @return On error a negative value is returned, otherwise the number of bytes
+ * used or zero if no frame data was decompressed (used) from the input AVPacket.
*/
-unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat pix_fmt);
+attribute_deprecated int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
+ int *frame_size_ptr,
+ AVPacket *avpkt);
+#endif
/**
- * Put a string representing the codec tag codec_tag in buf.
+ * Decode the audio frame of size avpkt->size from avpkt->data into frame.
*
- * @param buf_size size in bytes of buf
- * @return the length of the string that would have been generated if
- * enough space had been available, excluding the trailing null
+ * Some decoders may support multiple frames in a single AVPacket. Such
+ * decoders would then just decode the first frame. 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.
+ *
+ * @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.
+ *
+ * @note You might have to align the input buffer. The alignment requirements
+ * depend on the CPU and the decoder.
+ *
+ * @param avctx the codec context
+ * @param[out] frame The AVFrame in which to store decoded audio samples.
+ * Decoders request a buffer of a particular size by setting
+ * AVFrame.nb_samples prior to calling get_buffer(). The
+ * decoder may, however, only utilize part of the buffer by
+ * setting AVFrame.nb_samples to a smaller value in the
+ * output frame.
+ * @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is
+ * non-zero.
+ * @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.
*/
-size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
-
-#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
-#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
-#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
-#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
-#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
-#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
+int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
+ int *got_frame_ptr, AVPacket *avpkt);
/**
- * Compute what kind of losses will occur when converting from one specific
- * pixel format to another.
- * When converting from one pixel format to another, information loss may occur.
- * For example, when converting from RGB24 to GRAY, the color information will
- * be lost. Similarly, other losses occur when converting from some formats to
- * other formats. These losses can involve loss of chroma, but also loss of
- * resolution, loss of color depth, loss due to the color space conversion, loss
- * of the alpha bits or loss due to color quantization.
- * avcodec_get_fix_fmt_loss() informs you about the various types of losses
- * which will occur when converting from one pixel format to another.
+ * 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.
*
- * @param[in] dst_pix_fmt destination pixel format
- * @param[in] src_pix_fmt source pixel format
- * @param[in] has_alpha Whether the source pixel format alpha channel is used.
- * @return Combination of flags informing you what kind of losses will occur.
+ * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
+ * the actual read bytes because some optimized bitstream readers read 32 or 64
+ * bits at once and could read over the end.
+ *
+ * @warning The end of the input buffer buf should be set to 0 to ensure that
+ * no overreading happens for damaged MPEG streams.
+ *
+ * @note You might have to align the input buffer avpkt->data.
+ * The alignment requirements depend on the CPU: on some CPUs it isn't
+ * necessary at all, on others it won't work at all if not aligned and on others
+ * it will work but it will have an impact on performance.
+ *
+ * In practice, avpkt->data should have 4 byte alignment at minimum.
+ *
+ * @note 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 avcodec_alloc_frame to get an AVFrame, the codec will
+ * allocate memory for the actual bitmap.
+ * with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
+ * with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
+ * decodes and the decoder tells the user once it does not need the data anymore,
+ * the user app can at this point free/reuse/keep the memory as it sees fit.
+ *
+ * @param[in] avpkt The input AVpacket containing the input buffer.
+ * You can create such packet with av_init_packet() and by then setting
+ * data and size, some decoders might in addition need other fields like
+ * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
+ * fields possible.
+ * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
+ * @return On error a negative value is returned, otherwise the number of bytes
+ * used or zero if no frame could be decompressed.
*/
-int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
- int has_alpha);
+int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
+ int *got_picture_ptr,
+ AVPacket *avpkt);
/**
- * Find the best pixel format to convert to given a certain source pixel
- * format. When converting from one pixel format to another, information loss
- * may occur. For example, when converting from RGB24 to GRAY, the color
- * information will be lost. Similarly, other losses occur when converting from
- * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
- * the given pixel formats should be used to suffer the least amount of loss.
- * The pixel formats from which it chooses one, are determined by the
- * pix_fmt_mask parameter.
- *
- * @code
- * src_pix_fmt = PIX_FMT_YUV420P;
- * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
- * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
- * @endcode
+ * 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[in] pix_fmt_mask bitmask determining which pixel format to choose from
- * @param[in] src_pix_fmt source pixel format
- * @param[in] has_alpha Whether the source pixel format alpha channel is used.
- * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
- * @return The best pixel format to convert to or -1 if none was found.
+ * @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.
*/
-enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
- int has_alpha, int *loss_ptr);
-
-/* deinterlace a picture */
-/* deinterlace - if not supported return -1 */
-int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
- enum PixelFormat pix_fmt, int width, int height);
-
-/* external high level API */
+int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
+ int *got_sub_ptr,
+ AVPacket *avpkt);
/**
- * 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.
+ * @defgroup lavc_parsing Frame parsing
+ * @{
*/
-AVCodec *av_codec_next(AVCodec *c);
+
+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;
+} AVCodecParserContext;
+
+typedef struct AVCodecParser {
+ int codec_ids[5]; /* several codec IDs are permitted */
+ int priv_data_size;
+ int (*parser_init)(AVCodecParserContext *s);
+ int (*parser_parse)(AVCodecParserContext *s,
+ AVCodecContext *avctx,
+ const uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size);
+ void (*parser_close)(AVCodecParserContext *s);
+ int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
+ struct AVCodecParser *next;
+} AVCodecParser;
+
+AVCodecParser *av_parser_next(AVCodecParser *c);
+
+void av_register_codec_parser(AVCodecParser *parser);
+AVCodecParserContext *av_parser_init(int codec_id);
/**
- * Return the LIBAVCODEC_VERSION_INT constant.
+ * 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
*/
-unsigned avcodec_version(void);
+int av_parser_parse2(AVCodecParserContext *s,
+ AVCodecContext *avctx,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size,
+ int64_t pts, int64_t dts,
+ int64_t pos);
/**
- * Return the libavcodec build-time configuration.
+ * @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed
+ * @deprecated use AVBitstreamFilter
*/
-const char *avcodec_configuration(void);
+int av_parser_change(AVCodecParserContext *s,
+ AVCodecContext *avctx,
+ uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t *buf, int buf_size, int keyframe);
+void av_parser_close(AVCodecParserContext *s);
/**
- * 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()
+ * @addtogroup lavc_encoding
+ * @{
*/
-void avcodec_register(AVCodec *codec);
/**
* Find a registered encoder with a matching codec ID.
*
- * @param id CodecID of the requested encoder
+ * @param id AVCodecID of the requested encoder
* @return An encoder if one was found, NULL otherwise.
*/
-AVCodec *avcodec_find_encoder(enum CodecID id);
+AVCodec *avcodec_find_encoder(enum AVCodecID id);
/**
* Find a registered encoder with the specified name.
*/
AVCodec *avcodec_find_encoder_by_name(const char *name);
+#if FF_API_OLD_ENCODE_AUDIO
/**
- * Find a registered decoder with a matching codec ID.
+ * Encode an audio frame from samples into buf.
*
- * @param id CodecID of the requested decoder
- * @return A decoder if one was found, NULL otherwise.
+ * @deprecated Use avcodec_encode_audio2 instead.
+ *
+ * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
+ * However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user
+ * will know how much space is needed because it depends on the value passed
+ * in buf_size as described below. In that case a lower value can be used.
+ *
+ * @param avctx the codec context
+ * @param[out] buf the output buffer
+ * @param[in] buf_size the output buffer size
+ * @param[in] samples the input buffer containing the samples
+ * The number of samples read from this buffer is frame_size*channels,
+ * both of which are defined in avctx.
+ * For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of
+ * samples read from samples is equal to:
+ * buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id))
+ * This also implies that av_get_bits_per_sample() must not return 0 for these
+ * codecs.
+ * @return On error a negative value is returned, on success zero or the number
+ * of bytes used to encode the data read from the input buffer.
*/
-AVCodec *avcodec_find_decoder(enum CodecID id);
+int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx,
+ uint8_t *buf, int buf_size,
+ const short *samples);
+#endif
/**
- * Find a registered decoder with the specified name.
+ * Encode a frame of audio.
*
- * @param name name of the requested decoder
- * @return A decoder if one was found, NULL otherwise.
+ * Takes input samples from frame and writes the next output packet, if
+ * available, to avpkt. The output packet does not necessarily contain data for
+ * the most recent frame, as encoders can delay, split, and combine input frames
+ * internally as needed.
+ *
+ * @param avctx codec context
+ * @param avpkt output AVPacket.
+ * The user can supply an output buffer by setting
+ * avpkt->data and avpkt->size prior to calling the
+ * function, but if the size of the user-provided data is not
+ * large enough, encoding will fail. All other AVPacket fields
+ * will be reset by the encoder using av_init_packet(). If
+ * avpkt->data is NULL, the encoder will allocate it.
+ * The encoder will set avpkt->size to the size of the
+ * output packet.
+ *
+ * If this function fails or produces no output, avpkt will be
+ * freed using av_free_packet() (i.e. avpkt->destruct will be
+ * called to free the user supplied buffer).
+ * @param[in] frame AVFrame containing the raw audio data to be encoded.
+ * May be NULL when flushing an encoder that has the
+ * CODEC_CAP_DELAY capability set.
+ * If CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
+ * can have any number of samples.
+ * If it is not set, frame->nb_samples must be equal to
+ * avctx->frame_size for all frames except the last.
+ * The final frame may be smaller than avctx->frame_size.
+ * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
+ * output packet is non-empty, and to 0 if it is
+ * empty. If the function returns an error, the
+ * packet can be assumed to be invalid, and the
+ * value of got_packet_ptr is undefined and should
+ * not be used.
+ * @return 0 on success, negative error code on failure
*/
-AVCodec *avcodec_find_decoder_by_name(const char *name);
-void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
+int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt,
+ const AVFrame *frame, int *got_packet_ptr);
+#if FF_API_OLD_ENCODE_VIDEO
/**
- * Return a name for the specified profile, if available.
+ * @deprecated use avcodec_encode_video2() instead.
*
- * @param codec the codec that is searched for the given profile
- * @param profile the profile value for which a name is requested
- * @return A name for the profile if found, NULL otherwise.
+ * Encode a video frame from pict into buf.
+ * The input picture should be
+ * stored using a specific format, namely avctx.pix_fmt.
+ *
+ * @param avctx the codec context
+ * @param[out] buf the output buffer for the bitstream of encoded frame
+ * @param[in] buf_size the size of the output buffer in bytes
+ * @param[in] pict the input picture to encode
+ * @return On error a negative value is returned, on success zero or the number
+ * of bytes used from the output buffer.
*/
-const char *av_get_profile_name(const AVCodec *codec, int profile);
+attribute_deprecated
+int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+ const AVFrame *pict);
+#endif
/**
- * Set the fields of the given AVCodecContext to default values corresponding
- * to the given codec (defaults may be codec-dependent).
+ * Encode a frame of video.
*
- * 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.
+ * Takes input raw video data from frame and writes the next output packet, if
+ * available, to avpkt. The output packet does not necessarily contain data for
+ * the most recent frame, as encoders can delay and reorder input frames
+ * internally as needed.
+ *
+ * @param avctx codec context
+ * @param avpkt output AVPacket.
+ * The user can supply an output buffer by setting
+ * avpkt->data and avpkt->size prior to calling the
+ * function, but if the size of the user-provided data is not
+ * large enough, encoding will fail. All other AVPacket fields
+ * will be reset by the encoder using av_init_packet(). If
+ * avpkt->data is NULL, the encoder will allocate it.
+ * The encoder will set avpkt->size to the size of the
+ * output packet. The returned data (if any) belongs to the
+ * caller, he is responsible for freeing it.
+ *
+ * If this function fails or produces no output, avpkt will be
+ * freed using av_free_packet() (i.e. avpkt->destruct will be
+ * called to free the user supplied buffer).
+ * @param[in] frame AVFrame containing the raw video data to be encoded.
+ * May be NULL when flushing an encoder that has the
+ * CODEC_CAP_DELAY capability set.
+ * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
+ * output packet is non-empty, and to 0 if it is
+ * empty. If the function returns an error, the
+ * packet can be assumed to be invalid, and the
+ * value of got_packet_ptr is undefined and should
+ * not be used.
+ * @return 0 on success, negative error code on failure
*/
-int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec);
+int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
+ const AVFrame *frame, int *got_packet_ptr);
+
+int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+ const AVSubtitle *sub);
+
/**
- * Allocate an AVCodecContext and set its fields to default values. The
- * resulting struct can be deallocated by calling avcodec_close() on it followed
- * by av_free().
- *
- * @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(AVCodec *codec);
+#if FF_API_AVCODEC_RESAMPLE
/**
- * 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.
+ * @defgroup lavc_resample Audio resampling
+ * @ingroup libavc
+ * @deprecated use libavresample instead
*
- * @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);
+struct ReSampleContext;
+struct AVResampleContext;
+
+typedef struct ReSampleContext ReSampleContext;
/**
- * Set the fields of the given AVFrame to default values.
+ * Initialize audio resampling context.
*
- * @param pic The AVFrame of which the fields should be set to default values.
+ * @param output_channels number of output channels
+ * @param input_channels number of input channels
+ * @param output_rate output sample rate
+ * @param input_rate input sample rate
+ * @param sample_fmt_out requested output sample format
+ * @param sample_fmt_in input sample format
+ * @param filter_length length of each FIR filter in the filterbank relative to the cutoff frequency
+ * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
+ * @param linear if 1 then the used FIR filter will be linearly interpolated
+ between the 2 closest, if 0 the closest will be used
+ * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
+ * @return allocated ReSampleContext, NULL if error occurred
*/
-void avcodec_get_frame_defaults(AVFrame *pic);
+attribute_deprecated
+ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
+ int output_rate, int input_rate,
+ enum AVSampleFormat sample_fmt_out,
+ enum AVSampleFormat sample_fmt_in,
+ int filter_length, int log2_phase_count,
+ int linear, double cutoff);
+
+attribute_deprecated
+int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
/**
- * Allocate an AVFrame and set its fields to default values. The resulting
- * struct can be deallocated by simply calling av_free().
+ * Free resample context.
*
- * @return An AVFrame filled with default values or NULL on failure.
- * @see avcodec_get_frame_defaults
+ * @param s a non-NULL pointer to a resample context previously
+ * created with av_audio_resample_init()
+ */
+attribute_deprecated
+void audio_resample_close(ReSampleContext *s);
+
+
+/**
+ * Initialize an audio resampler.
+ * Note, if either rate is not an integer then simply scale both rates up so they are.
+ * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
+ * @param log2_phase_count log2 of the number of entries in the polyphase filterbank
+ * @param linear If 1 then the used FIR filter will be linearly interpolated
+ between the 2 closest, if 0 the closest will be used
+ * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
+ */
+attribute_deprecated
+struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
+
+/**
+ * Resample an array of samples using a previously configured context.
+ * @param src an array of unconsumed samples
+ * @param consumed the number of samples of src which have been consumed are returned here
+ * @param src_size the number of unconsumed samples available
+ * @param dst_size the amount of space in samples available in dst
+ * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
+ * @return the number of samples written in dst or -1 if an error occurred
*/
-AVFrame *avcodec_alloc_frame(void);
+attribute_deprecated
+int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
-int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
-void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
-int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
/**
- * Return the amount of padding in pixels which the get_buffer callback must
- * provide around the edge of the image for codecs which do not have the
- * CODEC_FLAG_EMU_EDGE flag.
+ * Compensate samplerate/timestamp drift. The compensation is done by changing
+ * the resampler parameters, so no audible clicks or similar distortions occur
+ * @param compensation_distance distance in output samples over which the compensation should be performed
+ * @param sample_delta number of output samples which should be output less
*
- * @return Required padding in pixels.
- */
-unsigned avcodec_get_edge_width(void);
-/**
- * Modify width and height values so that they will result in a memory
- * buffer that is acceptable for the codec if you do not use any horizontal
- * padding.
+ * example: av_resample_compensate(c, 10, 500)
+ * here instead of 510 samples only 500 samples would be output
*
- * May only be used if a codec with CODEC_CAP_DR1 has been opened.
- * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
- * according to avcodec_get_edge_width() before.
+ * note, due to rounding the actual compensation might be slightly different,
+ * especially if the compensation_distance is large and the in_rate used during init is small
*/
-void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
+attribute_deprecated
+void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
+attribute_deprecated
+void av_resample_close(struct AVResampleContext *c);
+
/**
- * Modify width and height values so that they will result in a memory
- * buffer that is acceptable for the codec if you also ensure that all
- * line sizes are a multiple of the respective linesize_align[i].
- *
- * May only be used if a codec with CODEC_CAP_DR1 has been opened.
- * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
- * according to avcodec_get_edge_width() before.
+ * @}
*/
-void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
- int linesize_align[AV_NUM_DATA_POINTERS]);
-
-enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
+#endif
-int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
-int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
-//FIXME func typedef
+/**
+ * @addtogroup lavc_picture
+ * @{
+ */
/**
- * 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(CODEC_ID_H264);
- * if (!codec)
- * exit(1);
- *
- * context = avcodec_alloc_context3(codec);
- *
- * if (avcodec_open2(context, codec, opts) < 0)
- * exit(1);
- * @endcode
+ * Allocate memory for a picture. Call avpicture_free() to free it.
*
- * @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.
+ * @see avpicture_fill()
*
- * @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().
+ * @param picture the picture to be filled in
+ * @param pix_fmt the format of the picture
+ * @param width the width of the picture
+ * @param height the height of the picture
+ * @return zero if successful, a negative value if not
*/
-int avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options);
+int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height);
-#if FF_API_OLD_DECODE_AUDIO
/**
- * Wrapper function which calls avcodec_decode_audio4.
- *
- * @deprecated Use avcodec_decode_audio4 instead.
- *
- * Decode the audio frame of size avpkt->size from avpkt->data into samples.
- * Some decoders may support multiple frames in a single AVPacket, such
- * decoders would then just decode the first frame. In this case,
- * avcodec_decode_audio3 has to be called again with an AVPacket that contains
- * the remaining data in order to decode the second frame etc.
- * If no frame
- * could be outputted, frame_size_ptr is zero. Otherwise, it is the
- * decompressed frame size in bytes.
- *
- * @warning You must set frame_size_ptr to the allocated size of the
- * output buffer before calling avcodec_decode_audio3().
- *
- * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
- * the actual read bytes because some optimized bitstream readers read 32 or 64
- * bits at once and could read over the end.
- *
- * @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
- * no overreading happens for damaged MPEG streams.
- *
- * @warning You must not provide a custom get_buffer() when using
- * avcodec_decode_audio3(). Doing so will override it with
- * avcodec_default_get_buffer. Use avcodec_decode_audio4() instead,
- * which does allow the application to provide a custom get_buffer().
- *
- * @note You might have to align the input buffer avpkt->data and output buffer
- * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
- * necessary at all, on others it won't work at all if not aligned and on others
- * it will work but it will have an impact on performance.
- *
- * In practice, avpkt->data should have 4 byte alignment at minimum and
- * samples should be 16 byte aligned unless the CPU doesn't need it
- * (AltiVec and SSE do).
- *
- * @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.
+ * Free a picture previously allocated by avpicture_alloc().
+ * The data buffer used by the AVPicture is freed, but the AVPicture structure
+ * itself is not.
*
- * @param avctx the codec context
- * @param[out] samples the output buffer, sample type in avctx->sample_fmt
- * If the sample format is planar, each channel plane will
- * be the same size, with no padding between channels.
- * @param[in,out] frame_size_ptr the output buffer size in bytes
- * @param[in] avpkt The input AVPacket containing the input buffer.
- * You can create such packet with av_init_packet() and by then setting
- * data and size, some decoders might in addition need other fields.
- * All decoders are designed to use the least fields possible though.
- * @return On error a negative value is returned, otherwise the number of bytes
- * used or zero if no frame data was decompressed (used) from the input AVPacket.
+ * @param picture the AVPicture to be freed
*/
-attribute_deprecated int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
- int *frame_size_ptr,
- AVPacket *avpkt);
-#endif
+void avpicture_free(AVPicture *picture);
/**
- * 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. 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.
- *
- * @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.
+ * Fill in the AVPicture fields.
+ * The fields of the given AVPicture are filled in by using the 'ptr' address
+ * which points to the image data buffer. Depending on the specified picture
+ * format, one or multiple image data pointers and line sizes will be set.
+ * If a planar format is specified, several pointers will be set pointing to
+ * the different picture planes and the line sizes of the different planes
+ * will be stored in the lines_sizes array.
+ * Call with ptr == NULL to get the required size for the ptr buffer.
*
- * @note You might have to align the input buffer. The alignment requirements
- * depend on the CPU and the decoder.
+ * To allocate the buffer and fill in the AVPicture fields in one call,
+ * use avpicture_alloc().
*
- * @param avctx the codec context
- * @param[out] frame The AVFrame in which to store decoded audio samples.
- * Decoders request a buffer of a particular size by setting
- * AVFrame.nb_samples prior to calling get_buffer(). The
- * decoder may, however, only utilize part of the buffer by
- * setting AVFrame.nb_samples to a smaller value in the
- * output frame.
- * @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is
- * non-zero.
- * @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.
+ * @param picture AVPicture whose fields are to be filled in
+ * @param ptr Buffer which will contain or contains the actual image data
+ * @param pix_fmt The format in which the picture data is stored.
+ * @param width the width of the image in pixels
+ * @param height the height of the image in pixels
+ * @return size of the image data in bytes
*/
-int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
- int *got_frame_ptr, AVPacket *avpkt);
+int avpicture_fill(AVPicture *picture, uint8_t *ptr,
+ enum AVPixelFormat pix_fmt, int width, int height);
/**
- * Decode the video frame of size avpkt->size from avpkt->data into picture.
- * Some decoders may support multiple frames in a single AVPacket, such
- * decoders would then just decode the first frame.
- *
- * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
- * the actual read bytes because some optimized bitstream readers read 32 or 64
- * bits at once and could read over the end.
- *
- * @warning The end of the input buffer buf should be set to 0 to ensure that
- * no overreading happens for damaged MPEG streams.
- *
- * @note You might have to align the input buffer avpkt->data.
- * The alignment requirements depend on the CPU: on some CPUs it isn't
- * necessary at all, on others it won't work at all if not aligned and on others
- * it will work but it will have an impact on performance.
- *
- * In practice, avpkt->data should have 4 byte alignment at minimum.
+ * Copy pixel data from an AVPicture into a buffer.
+ * The data is stored compactly, without any gaps for alignment or padding
+ * which may be applied by avpicture_fill().
*
- * @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.
+ * @see avpicture_get_size()
*
- * @param avctx the codec context
- * @param[out] picture The AVFrame in which the decoded video frame will be stored.
- * Use avcodec_alloc_frame to get an AVFrame, the codec will
- * allocate memory for the actual bitmap.
- * with default get/release_buffer(), the decoder frees/reuses the bitmap as it sees fit.
- * with overridden get/release_buffer() (needs CODEC_CAP_DR1) the user decides into what buffer the decoder
- * decodes and the decoder tells the user once it does not need the data anymore,
- * the user app can at this point free/reuse/keep the memory as it sees fit.
+ * @param[in] src AVPicture containing image data
+ * @param[in] pix_fmt The format in which the picture data is stored.
+ * @param[in] width the width of the image in pixels.
+ * @param[in] height the height of the image in pixels.
+ * @param[out] dest A buffer into which picture data will be copied.
+ * @param[in] dest_size The size of 'dest'.
+ * @return The number of bytes written to dest, or a negative value (error code) on error.
+ */
+int avpicture_layout(const AVPicture* src, enum AVPixelFormat pix_fmt,
+ int width, int height,
+ unsigned char *dest, int dest_size);
+
+/**
+ * Calculate the size in bytes that a picture of the given width and height
+ * would occupy if stored in the given picture format.
+ * Note that this returns the size of a compact representation as generated
+ * by avpicture_layout(), which can be smaller than the size required for e.g.
+ * avpicture_fill().
*
- * @param[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.
+ * @param pix_fmt the given picture format
+ * @param width the width of the image
+ * @param height the height of the image
+ * @return Image data size in bytes or -1 on error (e.g. too large dimensions).
*/
-int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
- int *got_picture_ptr,
- AVPacket *avpkt);
+int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height);
/**
- * 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.
+ * deinterlace - if not supported return -1
*/
-int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
- int *got_sub_ptr,
- AVPacket *avpkt);
+int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
+ enum AVPixelFormat pix_fmt, int width, int height);
+/**
+ * Copy image src to dst. Wraps av_picture_data_copy() above.
+ */
+void av_picture_copy(AVPicture *dst, const AVPicture *src,
+ enum AVPixelFormat pix_fmt, int width, int height);
/**
- * Free all allocated data in the given subtitle struct.
- *
- * @param sub AVSubtitle to free.
+ * Crop image top and left side.
*/
-void avsubtitle_free(AVSubtitle *sub);
+int av_picture_crop(AVPicture *dst, const AVPicture *src,
+ enum AVPixelFormat pix_fmt, int top_band, int left_band);
-#if FF_API_OLD_ENCODE_AUDIO
/**
- * Encode an audio frame from samples into buf.
- *
- * @deprecated Use avcodec_encode_audio2 instead.
- *
- * @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
- * However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user
- * will know how much space is needed because it depends on the value passed
- * in buf_size as described below. In that case a lower value can be used.
- *
- * @param avctx the codec context
- * @param[out] buf the output buffer
- * @param[in] buf_size the output buffer size
- * @param[in] samples the input buffer containing the samples
- * The number of samples read from this buffer is frame_size*channels,
- * both of which are defined in avctx.
- * For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of
- * samples read from samples is equal to:
- * buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id))
- * This also implies that av_get_bits_per_sample() must not return 0 for these
- * codecs.
- * @return On error a negative value is returned, on success zero or the number
- * of bytes used to encode the data read from the input buffer.
+ * Pad image.
*/
-int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx,
- uint8_t *buf, int buf_size,
- const short *samples);
-#endif
+int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt,
+ int padtop, int padbottom, int padleft, int padright, int *color);
/**
- * Encode a frame of audio.
- *
- * Takes input samples from frame and writes the next output packet, if
- * available, to avpkt. The output packet does not necessarily contain data for
- * the most recent frame, as encoders can delay, split, and combine input frames
- * internally as needed.
+ * @}
+ */
+
+/**
+ * @defgroup lavc_misc Utility functions
+ * @ingroup libavc
*
- * @param avctx codec context
- * @param avpkt output AVPacket.
- * The user can supply an output buffer by setting
- * avpkt->data and avpkt->size prior to calling the
- * function, but if the size of the user-provided data is not
- * large enough, encoding will fail. All other AVPacket fields
- * will be reset by the encoder using av_init_packet(). If
- * avpkt->data is NULL, the encoder will allocate it.
- * The encoder will set avpkt->size to the size of the
- * output packet.
+ * Miscellaneous utility functions related to both encoding and decoding
+ * (or neither).
+ * @{
+ */
+
+/**
+ * @defgroup lavc_misc_pixfmt Pixel formats
*
- * If this function fails or produces no output, avpkt will be
- * freed using av_free_packet() (i.e. avpkt->destruct will be
- * called to free the user supplied buffer).
- * @param[in] frame AVFrame containing the raw audio data to be encoded.
- * May be NULL when flushing an encoder that has the
- * CODEC_CAP_DELAY capability set.
- * There are 2 codec capabilities that affect the allowed
- * values of frame->nb_samples.
- * If CODEC_CAP_SMALL_LAST_FRAME is set, then only the final
- * frame may be smaller than avctx->frame_size, and all other
- * frames must be equal to avctx->frame_size.
- * If CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
- * can have any number of samples.
- * If neither is set, frame->nb_samples must be equal to
- * avctx->frame_size for all frames.
- * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
- * output packet is non-empty, and to 0 if it is
- * empty. If the function returns an error, the
- * packet can be assumed to be invalid, and the
- * value of got_packet_ptr is undefined and should
- * not be used.
- * @return 0 on success, negative error code on failure
+ * Functions for working with pixel formats.
+ * @{
*/
-int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt,
- const AVFrame *frame, int *got_packet_ptr);
+
+void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift);
/**
- * Fill audio frame data and linesize.
- * AVFrame extended_data channel pointers are allocated if necessary for
- * planar audio.
+ * Return a value representing the fourCC code associated to the
+ * pixel format pix_fmt, or 0 if no associated fourCC code can be
+ * found.
+ */
+unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt);
+
+#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
+#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
+#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
+#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
+#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
+#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
+
+/**
+ * Compute what kind of losses will occur when converting from one specific
+ * pixel format to another.
+ * When converting from one pixel format to another, information loss may occur.
+ * For example, when converting from RGB24 to GRAY, the color information will
+ * be lost. Similarly, other losses occur when converting from some formats to
+ * other formats. These losses can involve loss of chroma, but also loss of
+ * resolution, loss of color depth, loss due to the color space conversion, loss
+ * of the alpha bits or loss due to color quantization.
+ * avcodec_get_fix_fmt_loss() informs you about the various types of losses
+ * which will occur when converting from one pixel format to another.
*
- * @param frame the AVFrame
- * frame->nb_samples must be set prior to calling the
- * function. This function fills in frame->data,
- * frame->extended_data, frame->linesize[0].
- * @param nb_channels channel count
- * @param sample_fmt sample format
- * @param buf buffer to use for frame data
- * @param buf_size size of buffer
- * @param align plane size sample alignment
- * @return 0 on success, negative error code on failure
+ * @param[in] dst_pix_fmt destination pixel format
+ * @param[in] src_pix_fmt source pixel format
+ * @param[in] has_alpha Whether the source pixel format alpha channel is used.
+ * @return Combination of flags informing you what kind of losses will occur.
*/
-int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
- enum AVSampleFormat sample_fmt, const uint8_t *buf,
- int buf_size, int align);
+int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
+ int has_alpha);
-#if FF_API_OLD_ENCODE_VIDEO
+#if FF_API_FIND_BEST_PIX_FMT
/**
- * @deprecated use avcodec_encode_video2() instead.
+ * @deprecated use avcodec_find_best_pix_fmt2() instead.
*
- * Encode a video frame from pict into buf.
- * The input picture should be
- * stored using a specific format, namely avctx.pix_fmt.
+ * Find the best pixel format to convert to given a certain source pixel
+ * format. When converting from one pixel format to another, information loss
+ * may occur. For example, when converting from RGB24 to GRAY, the color
+ * information will be lost. Similarly, other losses occur when converting from
+ * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
+ * the given pixel formats should be used to suffer the least amount of loss.
+ * The pixel formats from which it chooses one, are determined by the
+ * pix_fmt_mask parameter.
*
- * @param avctx the codec context
- * @param[out] buf the output buffer for the bitstream of encoded frame
- * @param[in] buf_size the size of the output buffer in bytes
- * @param[in] pict the input picture to encode
- * @return On error a negative value is returned, on success zero or the number
- * of bytes used from the output buffer.
+ * @code
+ * src_pix_fmt = AV_PIX_FMT_YUV420P;
+ * pix_fmt_mask = (1 << AV_PIX_FMT_YUV422P) || (1 << AV_PIX_FMT_RGB24);
+ * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
+ * @endcode
+ *
+ * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
+ * @param[in] src_pix_fmt source pixel format
+ * @param[in] has_alpha Whether the source pixel format alpha channel is used.
+ * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
+ * @return The best pixel format to convert to or -1 if none was found.
*/
attribute_deprecated
-int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
- const AVFrame *pict);
-#endif
+enum AVPixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum AVPixelFormat src_pix_fmt,
+ int has_alpha, int *loss_ptr);
+#endif /* FF_API_FIND_BEST_PIX_FMT */
/**
- * Encode a frame of video.
+ * Find the best pixel format to convert to given a certain source pixel
+ * format. When converting from one pixel format to another, information loss
+ * may occur. For example, when converting from RGB24 to GRAY, the color
+ * information will be lost. Similarly, other losses occur when converting from
+ * some formats to other formats. avcodec_find_best_pix_fmt2() searches which of
+ * the given pixel formats should be used to suffer the least amount of loss.
+ * The pixel formats from which it chooses one, are determined by the
+ * pix_fmt_list parameter.
*
- * Takes input raw video data from frame and writes the next output packet, if
- * available, to avpkt. The output packet does not necessarily contain data for
- * the most recent frame, as encoders can delay and reorder input frames
- * internally as needed.
*
- * @param avctx codec context
- * @param avpkt output AVPacket.
- * The user can supply an output buffer by setting
- * avpkt->data and avpkt->size prior to calling the
- * function, but if the size of the user-provided data is not
- * large enough, encoding will fail. All other AVPacket fields
- * will be reset by the encoder using av_init_packet(). If
- * avpkt->data is NULL, the encoder will allocate it.
- * The encoder will set avpkt->size to the size of the
- * output packet. The returned data (if any) belongs to the
- * caller, he is responsible for freeing it.
+ * @param[in] pix_fmt_list AV_PIX_FMT_NONE terminated array of pixel formats to choose from
+ * @param[in] src_pix_fmt source pixel format
+ * @param[in] has_alpha Whether the source pixel format alpha channel is used.
+ * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
+ * @return The best pixel format to convert to or -1 if none was found.
+ */
+enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat *pix_fmt_list,
+ enum AVPixelFormat src_pix_fmt,
+ int has_alpha, int *loss_ptr);
+
+enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
+
+/**
+ * @}
+ */
+
+void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
+
+/**
+ * Put a string representing the codec tag codec_tag in buf.
*
- * If this function fails or produces no output, avpkt will be
- * freed using av_free_packet() (i.e. avpkt->destruct will be
- * called to free the user supplied buffer).
- * @param[in] frame AVFrame containing the raw video data to be encoded.
- * May be NULL when flushing an encoder that has the
- * CODEC_CAP_DELAY capability set.
- * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
- * output packet is non-empty, and to 0 if it is
- * empty. If the function returns an error, the
- * packet can be assumed to be invalid, and the
- * value of got_packet_ptr is undefined and should
- * not be used.
- * @return 0 on success, negative error code on failure
+ * @param buf_size size in bytes of buf
+ * @return the length of the string that would have been generated if
+ * enough space had been available, excluding the trailing null
*/
-int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
- const AVFrame *frame, int *got_packet_ptr);
+size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
-int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
- const AVSubtitle *sub);
+void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
/**
- * Close a given AVCodecContext and free all the data associated with it
- * (but not the AVCodecContext itself).
+ * Return a name for the specified profile, if available.
*
- * 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.
+ * @param codec the codec that is searched for the given profile
+ * @param profile the profile value for which a name is requested
+ * @return A name for the profile if found, NULL otherwise.
*/
-int avcodec_close(AVCodecContext *avctx);
+const char *av_get_profile_name(const AVCodec *codec, int profile);
+
+int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
+int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
+//FIXME func typedef
/**
- * 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.
+ * Fill audio frame data and linesize.
+ * AVFrame extended_data channel pointers are allocated if necessary for
+ * planar audio.
*
- * @see avcodec_register
- * @see av_register_codec_parser
- * @see av_register_bitstream_filter
+ * @param frame the AVFrame
+ * frame->nb_samples must be set prior to calling the
+ * function. This function fills in frame->data,
+ * frame->extended_data, frame->linesize[0].
+ * @param nb_channels channel count
+ * @param sample_fmt sample format
+ * @param buf buffer to use for frame data
+ * @param buf_size size of buffer
+ * @param align plane size sample alignment (0 = default)
+ * @return 0 on success, negative error code on failure
*/
-void avcodec_register_all(void);
+int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
+ enum AVSampleFormat sample_fmt, const uint8_t *buf,
+ int buf_size, int align);
/**
* Flush buffers, should be called when seeking or when switching to a different stream.
void avcodec_default_free_buffers(AVCodecContext *s);
-/* misc useful functions */
-
/**
* Return codec bits per sample.
*
* @param[in] codec_id the codec
* @return Number of bits per sample or zero if unknown for the given codec.
*/
-int av_get_bits_per_sample(enum CodecID codec_id);
+int av_get_bits_per_sample(enum AVCodecID codec_id);
/**
* Return codec bits per sample.
* @param[in] codec_id the codec
* @return Number of bits per sample or zero if unknown for the given codec.
*/
-int av_get_exact_bits_per_sample(enum CodecID codec_id);
+int av_get_exact_bits_per_sample(enum AVCodecID codec_id);
/**
* Return audio frame duration.
*/
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes);
-/* frame parsing */
-typedef struct AVCodecParserContext {
- void *priv_data;
- struct AVCodecParser *parser;
- int64_t frame_offset; /* offset of the current frame */
- int64_t cur_offset; /* current offset
- (incremented by each av_parser_parse()) */
- int64_t next_frame_offset; /* offset of the next frame */
- /* video info */
- int pict_type; /* XXX: Put it back in AVCodecContext. */
- /**
- * This field is used for proper frame duration computation in lavf.
- * It signals, how much longer the frame duration of the current frame
- * is compared to normal frame duration.
- *
- * frame_duration = (1 + repeat_pict) * time_base
- *
- * It is used by codecs like H.264 to display telecined material.
- */
- int repeat_pict; /* XXX: Put it back in AVCodecContext. */
- int64_t pts; /* pts of the current frame */
- int64_t dts; /* dts of the current frame */
-
- /* private data */
- int64_t last_pts;
- int64_t last_dts;
- int fetch_timestamp;
-
-#define AV_PARSER_PTS_NB 4
- int cur_frame_start_index;
- int64_t cur_frame_offset[AV_PARSER_PTS_NB];
- int64_t cur_frame_pts[AV_PARSER_PTS_NB];
- int64_t cur_frame_dts[AV_PARSER_PTS_NB];
-
- int flags;
-#define PARSER_FLAG_COMPLETE_FRAMES 0x0001
-#define PARSER_FLAG_ONCE 0x0002
-/// Set if the parser has a valid file offset
-#define PARSER_FLAG_FETCHED_OFFSET 0x0004
-
- int64_t offset; ///< byte offset from starting packet start
- int64_t cur_frame_end[AV_PARSER_PTS_NB];
-
- /**
- * Set by parser to 1 for key frames and 0 for non-key frames.
- * It is initialized to -1, so if the parser doesn't set this flag,
- * old-style fallback using AV_PICTURE_TYPE_I picture type as key frames
- * will be used.
- */
- int key_frame;
-
- /**
- * Time difference in stream time base units from the pts of this
- * packet to the point at which the output from the decoder has converged
- * independent from the availability of previous frames. That is, the
- * frames are virtually identical no matter if decoding started from
- * the very first frame or from this keyframe.
- * Is AV_NOPTS_VALUE if unknown.
- * This field is not the display duration of the current frame.
- * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
- * set.
- *
- * The purpose of this field is to allow seeking in streams that have no
- * keyframes in the conventional sense. It corresponds to the
- * recovery point SEI in H.264 and match_time_delta in NUT. It is also
- * essential for some types of subtitle streams to ensure that all
- * subtitles are correctly displayed after seeking.
- */
- int64_t convergence_duration;
-
- // Timestamp generation support:
- /**
- * Synchronization point for start of timestamp generation.
- *
- * Set to >0 for sync point, 0 for no sync point and <0 for undefined
- * (default).
- *
- * For example, this corresponds to presence of H.264 buffering period
- * SEI message.
- */
- int dts_sync_point;
-
- /**
- * Offset of the current timestamp against last timestamp sync point in
- * units of AVCodecContext.time_base.
- *
- * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
- * contain a valid timestamp offset.
- *
- * Note that the timestamp of sync point has usually a nonzero
- * dts_ref_dts_delta, which refers to the previous sync point. Offset of
- * the next frame after timestamp sync point will be usually 1.
- *
- * For example, this corresponds to H.264 cpb_removal_delay.
- */
- int dts_ref_dts_delta;
-
- /**
- * Presentation delay of current frame in units of AVCodecContext.time_base.
- *
- * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
- * contain valid non-negative timestamp delta (presentation time of a frame
- * must not lie in the past).
- *
- * This delay represents the difference between decoding and presentation
- * time of the frame.
- *
- * For example, this corresponds to H.264 dpb_output_delay.
- */
- int pts_dts_delta;
-
- /**
- * Position of the packet in file.
- *
- * Analogous to cur_frame_pts/dts
- */
- int64_t cur_frame_pos[AV_PARSER_PTS_NB];
-
- /**
- * Byte position of currently parsed frame in stream.
- */
- int64_t pos;
-
- /**
- * Previous frame byte position.
- */
- int64_t last_pos;
-
- /**
- * 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;
-} AVCodecParserContext;
-
-typedef struct AVCodecParser {
- int codec_ids[5]; /* several codec IDs are permitted */
- int priv_data_size;
- int (*parser_init)(AVCodecParserContext *s);
- int (*parser_parse)(AVCodecParserContext *s,
- AVCodecContext *avctx,
- const uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size);
- void (*parser_close)(AVCodecParserContext *s);
- int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
- struct AVCodecParser *next;
-} AVCodecParser;
-
-AVCodecParser *av_parser_next(AVCodecParser *c);
-
-void av_register_codec_parser(AVCodecParser *parser);
-AVCodecParserContext *av_parser_init(int codec_id);
-
-/**
- * Parse a packet.
- *
- * @param s parser context.
- * @param avctx codec context.
- * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
- * @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
- * @param buf input buffer.
- * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
- * @param pts input presentation timestamp.
- * @param dts input decoding timestamp.
- * @param pos input byte position in stream.
- * @return the number of bytes of the input bitstream used.
- *
- * Example:
- * @code
- * while(in_len){
- * len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
- * in_data, in_len,
- * pts, dts, pos);
- * in_data += len;
- * in_len -= len;
- *
- * if(size)
- * decode_frame(data, size);
- * }
- * @endcode
- */
-int av_parser_parse2(AVCodecParserContext *s,
- AVCodecContext *avctx,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size,
- int64_t pts, int64_t dts,
- int64_t pos);
-
-int av_parser_change(AVCodecParserContext *s,
- AVCodecContext *avctx,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size, int keyframe);
-void av_parser_close(AVCodecParserContext *s);
-
typedef struct AVBitStreamFilterContext {
void *priv_data;
*/
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
-/**
- * Copy image src to dst. Wraps av_picture_data_copy() above.
- */
-void av_picture_copy(AVPicture *dst, const AVPicture *src,
- enum PixelFormat pix_fmt, int width, int height);
-
-/**
- * Crop image top and left side.
- */
-int av_picture_crop(AVPicture *dst, const AVPicture *src,
- enum PixelFormat pix_fmt, int top_band, int left_band);
-
-/**
- * Pad image.
- */
-int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum PixelFormat pix_fmt,
- int padtop, int padbottom, int padleft, int padright, int *color);
-
/**
* Encode extradata length to a buffer. Used by xiph codecs.
*
/**
* Get the type of the given codec.
*/
-enum AVMediaType avcodec_get_type(enum CodecID codec_id);
-
-/**
- * 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);
+enum AVMediaType avcodec_get_type(enum AVCodecID codec_id);
/**
* @return a positive value if s is open (i.e. avcodec_open2() was called on it
/**
* @return a non-zero number if codec is an encoder, zero otherwise
*/
-int av_codec_is_encoder(AVCodec *codec);
+int av_codec_is_encoder(const AVCodec *codec);
/**
* @return a non-zero number if codec is a decoder, zero otherwise
*/
-int av_codec_is_decoder(AVCodec *codec);
+int av_codec_is_decoder(const AVCodec *codec);
+
+/**
+ * @return descriptor for given codec ID or NULL if no descriptor exists.
+ */
+const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id);
+
+/**
+ * Iterate over all codec descriptors known to libavcodec.
+ *
+ * @param prev previous descriptor. NULL to get the first descriptor.
+ *
+ * @return next descriptor or NULL after the last descriptor
+ */
+const AVCodecDescriptor *avcodec_descriptor_next(const AVCodecDescriptor *prev);
+
+/**
+ * @return codec descriptor with the given name or NULL if no such descriptor
+ * exists.
+ */
+const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name);
+
+/**
+ * @}
+ */
#endif /* AVCODEC_AVCODEC_H */
projects / ffmpeg / blobdiff