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Diffstat (limited to 'make/stub_includes/libav/lavc54.lavf54.lavu52.lavr01/libavcodec/avcodec.h')
| -rw-r--r-- | make/stub_includes/libav/lavc54.lavf54.lavu52.lavr01/libavcodec/avcodec.h | 4658 |
1 files changed, 0 insertions, 4658 deletions
diff --git a/make/stub_includes/libav/lavc54.lavf54.lavu52.lavr01/libavcodec/avcodec.h b/make/stub_includes/libav/lavc54.lavf54.lavu52.lavr01/libavcodec/avcodec.h deleted file mode 100644 index e6b8ec626..000000000 --- a/make/stub_includes/libav/lavc54.lavf54.lavu52.lavr01/libavcodec/avcodec.h +++ /dev/null @@ -1,4658 +0,0 @@ -/* - * copyright (c) 2001 Fabrice Bellard - * - * This file is part of Libav. - * - * Libav is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * Libav is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef AVCODEC_AVCODEC_H -#define AVCODEC_AVCODEC_H - -/** - * @file - * external API header - */ - -#include <errno.h> -#include "libavutil/samplefmt.h" -#include "libavutil/avutil.h" -#include "libavutil/cpu.h" -#include "libavutil/dict.h" -#include "libavutil/log.h" -#include "libavutil/pixfmt.h" -#include "libavutil/rational.h" - -#include "libavcodec/version.h" -/** - * @defgroup libavc Encoding/Decoding Library - * @{ - * - * @defgroup lavc_decoding Decoding - * @{ - * @} - * - * @defgroup lavc_encoding Encoding - * @{ - * @} - * - * @defgroup lavc_codec Codecs - * @{ - * @defgroup lavc_codec_native Native Codecs - * @{ - * @} - * @defgroup lavc_codec_wrappers External library wrappers - * @{ - * @} - * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge - * @{ - * @} - * @} - * @defgroup lavc_internal Internal - * @{ - * @} - * @} - * - */ - -/** - * @defgroup lavc_core Core functions/structures. - * @ingroup libavc - * - * Basic definitions, functions for querying libavcodec capabilities, - * allocating core structures, etc. - * @{ - */ - - -/** - * Identify the syntax and semantics of the bitstream. - * The principle is roughly: - * Two decoders with the same ID can decode the same streams. - * Two encoders with the same ID can encode compatible streams. - * There may be slight deviations from the principle due to implementation - * details. - * - * If you add a codec ID to this list, add it so that - * 1. no value of a existing codec ID changes (that would break ABI), - * 2. it is as close as possible to similar codecs. - * - * After adding new codec IDs, do not forget to add an entry to the codec - * descriptor list and bump libavcodec minor version. - */ -enum AVCodecID { - AV_CODEC_ID_NONE, - - /* video codecs */ - AV_CODEC_ID_MPEG1VIDEO, - AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding - 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" */ - 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 */ - 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 */ - AV_CODEC_ID_AMR_NB = 0x12000, - AV_CODEC_ID_AMR_WB, - - /* RealAudio codecs*/ - AV_CODEC_ID_RA_144 = 0x13000, - AV_CODEC_ID_RA_288, - - /* various DPCM codecs */ - AV_CODEC_ID_ROQ_DPCM = 0x14000, - AV_CODEC_ID_INTERPLAY_DPCM, - AV_CODEC_ID_XAN_DPCM, - AV_CODEC_ID_SOL_DPCM, - - /* audio codecs */ - AV_CODEC_ID_MP2 = 0x15000, - AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3 - AV_CODEC_ID_AAC, - AV_CODEC_ID_AC3, - AV_CODEC_ID_DTS, - AV_CODEC_ID_VORBIS, - AV_CODEC_ID_DVAUDIO, - AV_CODEC_ID_WMAV1, - AV_CODEC_ID_WMAV2, - AV_CODEC_ID_MACE3, - AV_CODEC_ID_MACE6, - AV_CODEC_ID_VMDAUDIO, - AV_CODEC_ID_FLAC, - AV_CODEC_ID_MP3ADU, - AV_CODEC_ID_MP3ON4, - AV_CODEC_ID_SHORTEN, - AV_CODEC_ID_ALAC, - AV_CODEC_ID_WESTWOOD_SND1, - AV_CODEC_ID_GSM, ///< as in Berlin toast format - AV_CODEC_ID_QDM2, - AV_CODEC_ID_COOK, - AV_CODEC_ID_TRUESPEECH, - AV_CODEC_ID_TTA, - AV_CODEC_ID_SMACKAUDIO, - AV_CODEC_ID_QCELP, - AV_CODEC_ID_WAVPACK, - AV_CODEC_ID_DSICINAUDIO, - AV_CODEC_ID_IMC, - AV_CODEC_ID_MUSEPACK7, - AV_CODEC_ID_MLP, - AV_CODEC_ID_GSM_MS, /* as found in WAV */ - AV_CODEC_ID_ATRAC3, - 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, - AV_CODEC_ID_TAK, - - /* subtitle codecs */ - AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs. - AV_CODEC_ID_DVD_SUBTITLE = 0x17000, - AV_CODEC_ID_DVB_SUBTITLE, - AV_CODEC_ID_TEXT, ///< raw UTF-8 text - AV_CODEC_ID_XSUB, - AV_CODEC_ID_SSA, - AV_CODEC_ID_MOV_TEXT, - AV_CODEC_ID_HDMV_PGS_SUBTITLE, - AV_CODEC_ID_DVB_TELETEXT, - AV_CODEC_ID_SRT, - - /* other specific kind of codecs (generally used for attachments) */ - AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs. - AV_CODEC_ID_TTF = 0x18000, - - AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it - - AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS - * stream (only used by libavformat) */ - AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems - * stream (only used by libavformat) */ - AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information. - -#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> - * Note: If the first 23 bits of the additional bytes are not 0, then damaged - * MPEG bitstreams could cause overread and segfault. - */ -#define FF_INPUT_BUFFER_PADDING_SIZE 8 - -/** - * @ingroup lavc_encoding - * minimum encoding buffer size - * Used to avoid some checks during header writing. - */ -#define FF_MIN_BUFFER_SIZE 16384 - - -/** - * @ingroup lavc_encoding - * motion estimation type. - */ -enum Motion_Est_ID { - ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed - ME_FULL, - ME_LOG, - ME_PHODS, - ME_EPZS, ///< enhanced predictive zonal search - ME_X1, ///< reserved for experiments - ME_HEX, ///< hexagon based search - ME_UMH, ///< uneven multi-hexagon search - ME_ITER, ///< iterative search - ME_TESA, ///< transformed exhaustive search algorithm -}; - -/** - * @ingroup lavc_decoding - */ -enum AVDiscard{ - /* We leave some space between them for extensions (drop some - * keyframes for intra-only or drop just some bidir frames). */ - AVDISCARD_NONE =-16, ///< discard nothing - AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi - AVDISCARD_NONREF = 8, ///< discard all non reference - AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames - AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes - AVDISCARD_ALL = 48, ///< discard all -}; - -enum AVColorPrimaries{ - AVCOL_PRI_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B - AVCOL_PRI_UNSPECIFIED = 2, - AVCOL_PRI_BT470M = 4, - AVCOL_PRI_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM - AVCOL_PRI_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC - AVCOL_PRI_SMPTE240M = 7, ///< functionally identical to above - AVCOL_PRI_FILM = 8, - AVCOL_PRI_NB , ///< Not part of ABI -}; - -enum AVColorTransferCharacteristic{ - AVCOL_TRC_BT709 = 1, ///< also ITU-R BT1361 - AVCOL_TRC_UNSPECIFIED = 2, - AVCOL_TRC_GAMMA22 = 4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM - AVCOL_TRC_GAMMA28 = 5, ///< also ITU-R BT470BG - AVCOL_TRC_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_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 -}; - -/** - * X X 3 4 X X are luma samples, - * 1 2 1-6 are possible chroma positions - * X X 5 6 X 0 is undefined/unknown position - */ -enum AVChromaLocation{ - AVCHROMA_LOC_UNSPECIFIED = 0, - AVCHROMA_LOC_LEFT = 1, ///< mpeg2/4, h264 default - AVCHROMA_LOC_CENTER = 2, ///< mpeg1, jpeg, h263 - AVCHROMA_LOC_TOPLEFT = 3, ///< DV - AVCHROMA_LOC_TOP = 4, - AVCHROMA_LOC_BOTTOMLEFT = 5, - AVCHROMA_LOC_BOTTOM = 6, - AVCHROMA_LOC_NB , ///< Not part of ABI -}; - -enum AVAudioServiceType { - AV_AUDIO_SERVICE_TYPE_MAIN = 0, - AV_AUDIO_SERVICE_TYPE_EFFECTS = 1, - AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED = 2, - AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED = 3, - AV_AUDIO_SERVICE_TYPE_DIALOGUE = 4, - AV_AUDIO_SERVICE_TYPE_COMMENTARY = 5, - AV_AUDIO_SERVICE_TYPE_EMERGENCY = 6, - AV_AUDIO_SERVICE_TYPE_VOICE_OVER = 7, - AV_AUDIO_SERVICE_TYPE_KARAOKE = 8, - AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI -}; - -/** - * @ingroup lavc_encoding - */ -typedef struct RcOverride{ - int start_frame; - int end_frame; - int qscale; // If this is 0 then quality_factor will be used instead. - float quality_factor; -} RcOverride; - -#define FF_MAX_B_FRAMES 16 - -/* encoding support - These flags can be passed in AVCodecContext.flags before initialization. - Note: Not everything is supported yet. -*/ - -#define CODEC_FLAG_QSCALE 0x0002 ///< Use fixed qscale. -#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / advanced prediction for H.263. -#define CODEC_FLAG_QPEL 0x0010 ///< Use qpel MC. -#define CODEC_FLAG_GMC 0x0020 ///< Use GMC. -#define CODEC_FLAG_MV0 0x0040 ///< Always try a MB with MV=<0,0>. -/** - * The parent program guarantees that the input for B-frames containing - * streams is not written to for at least s->max_b_frames+1 frames, if - * this is not set the input will be copied. - */ -#define CODEC_FLAG_INPUT_PRESERVED 0x0100 -#define CODEC_FLAG_PASS1 0x0200 ///< Use internal 2pass ratecontrol in first pass mode. -#define CODEC_FLAG_PASS2 0x0400 ///< Use internal 2pass ratecontrol in second pass mode. -#define CODEC_FLAG_GRAY 0x2000 ///< Only decode/encode grayscale. -#define CODEC_FLAG_EMU_EDGE 0x4000 ///< Don't draw edges. -#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding. -#define CODEC_FLAG_TRUNCATED 0x00010000 /** Input bitstream might be truncated at a random - location instead of only at frame boundaries. */ -#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< Normalize adaptive quantization. -#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT. -#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< Force low delay. -#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< Place global headers in extradata instead of every keyframe. -#define CODEC_FLAG_BITEXACT 0x00800000 ///< Use only bitexact stuff (except (I)DCT). -/* Fx : Flag for h263+ extra options */ -#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction -#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter -#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation -#define CODEC_FLAG_CLOSED_GOP 0x80000000 -#define CODEC_FLAG2_FAST 0x00000001 ///< Allow non spec compliant speedup tricks. -#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< Skip bitstream encoding. -#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< Place global headers at every keyframe instead of in extradata. -#if FF_API_MPV_GLOBAL_OPTS -#define CODEC_FLAG_CBP_RD 0x04000000 ///< Use rate distortion optimization for cbp. -#define CODEC_FLAG_QP_RD 0x08000000 ///< Use rate distortion optimization for qp selectioon. -#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< Strictly enforce GOP size. -#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping -#endif -#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries. - -/* Unsupported options : - * Syntax Arithmetic coding (SAC) - * Reference Picture Selection - * Independent Segment Decoding */ -/* /Fx */ -/* codec capabilities */ - -#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback. -/** - * Codec uses get_buffer() for allocating buffers and supports custom allocators. - * If not set, it might not use get_buffer() at all or use operations that - * assume the buffer was allocated by avcodec_default_get_buffer. - */ -#define CODEC_CAP_DR1 0x0002 -#define CODEC_CAP_TRUNCATED 0x0008 -/* Codec can export data for HW decoding (XvMC). */ -#define CODEC_CAP_HWACCEL 0x0010 -/** - * Encoder or decoder requires flushing with NULL input at the end in order to - * give the complete and correct output. - * - * NOTE: If this flag is not set, the codec is guaranteed to never be fed with - * with NULL data. The user can still send NULL data to the public encode - * or decode function, but libavcodec will not pass it along to the codec - * unless this flag is set. - * - * Decoders: - * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL, - * avpkt->size=0 at the end to get the delayed data until the decoder no longer - * returns frames. - * - * Encoders: - * The encoder needs to be fed with NULL data at the end of encoding until the - * encoder no longer returns data. - * - * NOTE: For encoders implementing the AVCodec.encode2() function, setting this - * flag also means that the encoder must set the pts and duration for - * each output packet. If this flag is not set, the pts and duration will - * be determined by libavcodec from the input frame. - */ -#define CODEC_CAP_DELAY 0x0020 -/** - * Codec can be fed a final frame with a smaller size. - * This can be used to prevent truncation of the last audio samples. - */ -#define CODEC_CAP_SMALL_LAST_FRAME 0x0040 -/** - * Codec can export data for HW decoding (VDPAU). - */ -#define CODEC_CAP_HWACCEL_VDPAU 0x0080 -/** - * Codec can output multiple frames per AVPacket - * Normally demuxers return one frame at a time, demuxers which do not do - * are connected to a parser to split what they return into proper frames. - * This flag is reserved to the very rare category of codecs which have a - * bitstream that cannot be split into frames without timeconsuming - * operations like full decoding. Demuxers carring such bitstreams thus - * may return multiple frames in a packet. This has many disadvantages like - * prohibiting stream copy in many cases thus it should only be considered - * as a last resort. - */ -#define CODEC_CAP_SUBFRAMES 0x0100 -/** - * Codec is experimental and is thus avoided in favor of non experimental - * encoders - */ -#define CODEC_CAP_EXPERIMENTAL 0x0200 -/** - * Codec should fill in channel configuration and samplerate instead of container - */ -#define CODEC_CAP_CHANNEL_CONF 0x0400 -/** - * Codec is able to deal with negative linesizes - */ -#define CODEC_CAP_NEG_LINESIZES 0x0800 -/** - * Codec supports frame-level multithreading. - */ -#define CODEC_CAP_FRAME_THREADS 0x1000 -/** - * Codec supports slice-based (or partition-based) multithreading. - */ -#define CODEC_CAP_SLICE_THREADS 0x2000 -/** - * Codec supports changed parameters at any point. - */ -#define CODEC_CAP_PARAM_CHANGE 0x4000 -/** - * Codec supports avctx->thread_count == 0 (auto). - */ -#define CODEC_CAP_AUTO_THREADS 0x8000 -/** - * Audio encoder supports receiving a different number of samples in each call. - */ -#define CODEC_CAP_VARIABLE_FRAME_SIZE 0x10000 - -//The following defines may change, don't expect compatibility if you use them. -#define MB_TYPE_INTRA4x4 0x0001 -#define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific -#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-specific -#define MB_TYPE_16x16 0x0008 -#define MB_TYPE_16x8 0x0010 -#define MB_TYPE_8x16 0x0020 -#define MB_TYPE_8x8 0x0040 -#define MB_TYPE_INTERLACED 0x0080 -#define MB_TYPE_DIRECT2 0x0100 //FIXME -#define MB_TYPE_ACPRED 0x0200 -#define MB_TYPE_GMC 0x0400 -#define MB_TYPE_SKIP 0x0800 -#define MB_TYPE_P0L0 0x1000 -#define MB_TYPE_P1L0 0x2000 -#define MB_TYPE_P0L1 0x4000 -#define MB_TYPE_P1L1 0x8000 -#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0) -#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1) -#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1) -#define MB_TYPE_QUANT 0x00010000 -#define MB_TYPE_CBP 0x00020000 -//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...) - -/** - * Pan Scan area. - * This specifies the area which should be displayed. - * Note there may be multiple such areas for one frame. - */ -typedef struct AVPanScan{ - /** - * id - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - int id; - - /** - * width and height in 1/16 pel - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - int width; - int height; - - /** - * position of the top left corner in 1/16 pel for up to 3 fields/frames - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - int16_t position[3][2]; -}AVPanScan; - -#define FF_QSCALE_TYPE_MPEG1 0 -#define FF_QSCALE_TYPE_MPEG2 1 -#define FF_QSCALE_TYPE_H264 2 -#define FF_QSCALE_TYPE_VP56 3 - -#define FF_BUFFER_TYPE_INTERNAL 1 -#define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user) -#define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared. -#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything. - -#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore). -#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer. -#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content. -#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update). - -/** - * @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 - * the decompressed packet will be presented to the user. - * Can be AV_NOPTS_VALUE if it is not stored in the file. - * pts MUST be larger or equal to dts as presentation cannot happen before - * decompression, unless one wants to view hex dumps. Some formats misuse - * the terms dts and pts/cts to mean something different. Such timestamps - * must be converted to true pts/dts before they are stored in AVPacket. - */ - int64_t pts; - /** - * Decompression timestamp in AVStream->time_base units; the time at which - * the packet is decompressed. - * Can be AV_NOPTS_VALUE if it is not stored in the file. - */ - int64_t dts; - uint8_t *data; - int size; - int stream_index; - /** - * A combination of AV_PKT_FLAG values - */ - int flags; - /** - * Additional packet data that can be provided by the container. - * Packet can contain several types of side information. - */ - struct { - uint8_t *data; - int size; - enum AVPacketSideDataType type; - } *side_data; - int side_data_elems; - - /** - * Duration of this packet in AVStream->time_base units, 0 if unknown. - * Equals next_pts - this_pts in presentation order. - */ - int duration; - void (*destruct)(struct AVPacket *); - void *priv; - int64_t pos; ///< byte position in stream, -1 if unknown - - /** - * Time difference in AVStream->time_base units from the pts of this - * packet to the point at which the output from the decoder has converged - * independent from the availability of previous frames. That is, the - * frames are virtually identical no matter if decoding started from - * the very first frame or from this keyframe. - * Is AV_NOPTS_VALUE if unknown. - * This field is not the display duration of the current packet. - * This field has no meaning if the packet does not have AV_PKT_FLAG_KEY - * set. - * - * The purpose of this field is to allow seeking in streams that have no - * keyframes in the conventional sense. It corresponds to the - * recovery point SEI in H.264 and match_time_delta in NUT. It is also - * essential for some types of subtitle streams to ensure that all - * subtitles are correctly displayed after seeking. - */ - int64_t convergence_duration; -} AVPacket; -#define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe -#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted - -enum AVSideDataParamChangeFlags { - AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = 0x0001, - AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002, - AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = 0x0004, - AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = 0x0008, -}; -/** - * @} - */ - -/** - * This structure describes decoded (raw) audio or video data. - * - * AVFrame must be allocated using avcodec_alloc_frame() and freed with - * avcodec_free_frame(). Note that this allocates only the AVFrame itself. The - * buffers for the data must be managed through other means. - * - * AVFrame is typically allocated once and then reused multiple times to hold - * different data (e.g. a single AVFrame to hold frames received from a - * decoder). In such a case, avcodec_get_frame_defaults() should be used to - * reset the frame to its original clean state before it is reused again. - * - * sizeof(AVFrame) is not a part of the public ABI, so new fields may be added - * to the end with a minor bump. - */ -typedef struct AVFrame { -#define AV_NUM_DATA_POINTERS 8 - /** - * pointer to the picture/channel planes. - * This might be different from the first allocated byte - * - encoding: Set by user - * - decoding: set by AVCodecContext.get_buffer() - */ - uint8_t *data[AV_NUM_DATA_POINTERS]; - - /** - * Size, in bytes, of the data for each picture/channel plane. - * - * For audio, only linesize[0] may be set. For planar audio, each channel - * plane must be the same size. - * - * - encoding: Set by user - * - decoding: set by AVCodecContext.get_buffer() - */ - int linesize[AV_NUM_DATA_POINTERS]; - - /** - * pointers to the data planes/channels. - * - * For video, this should simply point to data[]. - * - * For planar audio, each channel has a separate data pointer, and - * linesize[0] contains the size of each channel buffer. - * For packed audio, there is just one data pointer, and linesize[0] - * contains the total size of the buffer for all channels. - * - * Note: Both data and extended_data will always be set by get_buffer(), - * but for planar audio with more channels that can fit in data, - * extended_data must be used by the decoder in order to access all - * channels. - * - * encoding: set by user - * decoding: set by AVCodecContext.get_buffer() - */ - uint8_t **extended_data; - - /** - * width and height of the video frame - * - encoding: unused - * - decoding: Read by user. - */ - int width, height; - - /** - * number of audio samples (per channel) described by this frame - * - encoding: Set by user - * - decoding: Set by libavcodec - */ - int nb_samples; - - /** - * format of the frame, -1 if unknown or unset - * Values correspond to enum AVPixelFormat for video frames, - * enum AVSampleFormat for audio) - * - encoding: unused - * - decoding: Read by user. - */ - int format; - - /** - * 1 -> keyframe, 0-> not - * - encoding: Set by libavcodec. - * - decoding: Set by libavcodec. - */ - int key_frame; - - /** - * Picture type of the frame, see ?_TYPE below. - * - encoding: Set by libavcodec. for coded_picture (and set by user for input). - * - decoding: Set by libavcodec. - */ - enum AVPictureType pict_type; - - /** - * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer. - * This isn't used by libavcodec unless the default get/release_buffer() is used. - * - encoding: - * - decoding: - */ - uint8_t *base[AV_NUM_DATA_POINTERS]; - - /** - * sample aspect ratio for the video frame, 0/1 if unknown/unspecified - * - encoding: unused - * - decoding: Read by user. - */ - AVRational sample_aspect_ratio; - - /** - * presentation timestamp in time_base units (time when frame should be shown to user) - * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed. - * - encoding: MUST be set by user. - * - decoding: Set by libavcodec. - */ - int64_t pts; - - /** - * pts copied from the AVPacket that was decoded to produce this frame - * - encoding: unused - * - decoding: Read by user. - */ - int64_t pkt_pts; - - /** - * dts copied from the AVPacket that triggered returning this frame - * - encoding: unused - * - decoding: Read by user. - */ - int64_t pkt_dts; - - /** - * picture number in bitstream order - * - encoding: set by - * - decoding: Set by libavcodec. - */ - int coded_picture_number; - /** - * picture number in display order - * - encoding: set by - * - decoding: Set by libavcodec. - */ - int display_picture_number; - - /** - * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) - * - encoding: Set by libavcodec. for coded_picture (and set by user for input). - * - decoding: Set by libavcodec. - */ - int quality; - - /** - * is this picture used as reference - * The values for this are the same as the MpegEncContext.picture_structure - * variable, that is 1->top field, 2->bottom field, 3->frame/both fields. - * Set to 4 for delayed, non-reference frames. - * - encoding: unused - * - decoding: Set by libavcodec. (before get_buffer() call)). - */ - int reference; - - /** - * QP table - * - encoding: unused - * - decoding: Set by libavcodec. - */ - int8_t *qscale_table; - /** - * QP store stride - * - encoding: unused - * - decoding: Set by libavcodec. - */ - int qstride; - - /** - * - */ - int qscale_type; - - /** - * mbskip_table[mb]>=1 if MB didn't change - * stride= mb_width = (width+15)>>4 - * - encoding: unused - * - decoding: Set by libavcodec. - */ - uint8_t *mbskip_table; - - /** - * motion vector table - * @code - * example: - * int mv_sample_log2= 4 - motion_subsample_log2; - * int mb_width= (width+15)>>4; - * int mv_stride= (mb_width << mv_sample_log2) + 1; - * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y]; - * @endcode - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - int16_t (*motion_val[2])[2]; - - /** - * macroblock type table - * mb_type_base + mb_width + 2 - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - uint32_t *mb_type; - - /** - * DCT coefficients - * - encoding: unused - * - decoding: Set by libavcodec. - */ - short *dct_coeff; - - /** - * motion reference frame index - * the order in which these are stored can depend on the codec. - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - int8_t *ref_index[2]; - - /** - * for some private data of the user - * - encoding: unused - * - decoding: Set by user. - */ - void *opaque; - - /** - * error - * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR. - * - decoding: unused - */ - uint64_t error[AV_NUM_DATA_POINTERS]; - - /** - * type of the buffer (to keep track of who has to deallocate data[*]) - * - encoding: Set by the one who allocates it. - * - decoding: Set by the one who allocates it. - * Note: User allocated (direct rendering) & internal buffers cannot coexist currently. - */ - int type; - - /** - * When decoding, this signals how much the picture must be delayed. - * extra_delay = repeat_pict / (2*fps) - * - encoding: unused - * - decoding: Set by libavcodec. - */ - int repeat_pict; - - /** - * The content of the picture is interlaced. - * - encoding: Set by user. - * - decoding: Set by libavcodec. (default 0) - */ - int interlaced_frame; - - /** - * If the content is interlaced, is top field displayed first. - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - int top_field_first; - - /** - * Tell user application that palette has changed from previous frame. - * - encoding: ??? (no palette-enabled encoder yet) - * - decoding: Set by libavcodec. (default 0). - */ - int palette_has_changed; - - /** - * codec suggestion on buffer type if != 0 - * - encoding: unused - * - decoding: Set by libavcodec. (before get_buffer() call)). - */ - int buffer_hints; - - /** - * Pan scan. - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - AVPanScan *pan_scan; - - /** - * reordered opaque 64bit (generally an integer or a double precision float - * PTS but can be anything). - * The user sets AVCodecContext.reordered_opaque to represent the input at - * that time, - * the decoder reorders values as needed and sets AVFrame.reordered_opaque - * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque - * @deprecated in favor of pkt_pts - * - encoding: unused - * - decoding: Read by user. - */ - int64_t reordered_opaque; - - /** - * hardware accelerator private data (Libav-allocated) - * - encoding: unused - * - decoding: Set by libavcodec - */ - void *hwaccel_picture_private; - - /** - * the AVCodecContext which ff_thread_get_buffer() was last called on - * - encoding: Set by libavcodec. - * - decoding: Set by libavcodec. - */ - struct AVCodecContext *owner; - - /** - * used by multithreading to store frame-specific info - * - encoding: Set by libavcodec. - * - decoding: Set by libavcodec. - */ - void *thread_opaque; - - /** - * log2 of the size of the block which a single vector in motion_val represents: - * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2) - * - encoding: unused - * - decoding: Set by libavcodec. - */ - uint8_t motion_subsample_log2; - - /** - * 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; - -enum AVFieldOrder { - AV_FIELD_UNKNOWN, - AV_FIELD_PROGRESSIVE, - AV_FIELD_TT, //< Top coded_first, top displayed first - AV_FIELD_BB, //< Bottom coded first, bottom displayed first - AV_FIELD_TB, //< Top coded first, bottom displayed first - AV_FIELD_BT, //< Bottom coded first, top displayed first -}; - -/** - * main external API structure. - * New fields can be added to the end with minor version bumps. - * Removal, reordering and changes to existing fields require a major - * version bump. - * sizeof(AVCodecContext) must not be used outside libav*. - */ -typedef struct AVCodecContext { - /** - * information on struct for av_log - * - set by avcodec_alloc_context3 - */ - const AVClass *av_class; - int log_level_offset; - - enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */ - const struct AVCodec *codec; - char codec_name[32]; - enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */ - - /** - * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A'). - * This is used to work around some encoder bugs. - * A demuxer should set this to what is stored in the field used to identify the codec. - * If there are multiple such fields in a container then the demuxer should choose the one - * which maximizes the information about the used codec. - * If the codec tag field in a container is larger than 32 bits then the demuxer should - * remap the longer ID to 32 bits with a table or other structure. Alternatively a new - * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated - * first. - * - encoding: Set by user, if not then the default based on codec_id will be used. - * - decoding: Set by user, will be converted to uppercase by libavcodec during init. - */ - unsigned int codec_tag; - - /** - * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A'). - * This is used to work around some encoder bugs. - * - encoding: unused - * - decoding: Set by user, will be converted to uppercase by libavcodec during init. - */ - unsigned int stream_codec_tag; - -#if FF_API_SUB_ID - /** - * @deprecated this field is unused - */ - attribute_deprecated int sub_id; -#endif - - void *priv_data; - - /** - * Private context used for internal data. - * - * Unlike priv_data, this is not codec-specific. It is used in general - * libavcodec functions. - */ - struct AVCodecInternal *internal; - - /** - * Private data of the user, can be used to carry app specific stuff. - * - encoding: Set by user. - * - decoding: Set by user. - */ - void *opaque; - - /** - * the average bitrate - * - encoding: Set by user; unused for constant quantizer encoding. - * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream. - */ - int bit_rate; - - /** - * number of bits the bitstream is allowed to diverge from the reference. - * the reference can be CBR (for CBR pass1) or VBR (for pass2) - * - encoding: Set by user; unused for constant quantizer encoding. - * - decoding: unused - */ - int bit_rate_tolerance; - - /** - * Global quality for codecs which cannot change it per frame. - * This should be proportional to MPEG-1/2/4 qscale. - * - encoding: Set by user. - * - decoding: unused - */ - int global_quality; - - /** - * - encoding: Set by user. - * - decoding: unused - */ - int compression_level; -#define FF_COMPRESSION_DEFAULT -1 - - /** - * CODEC_FLAG_*. - * - encoding: Set by user. - * - decoding: Set by user. - */ - int flags; - - /** - * CODEC_FLAG2_* - * - encoding: Set by user. - * - decoding: Set by user. - */ - int flags2; - - /** - * some codecs need / can use extradata like Huffman tables. - * mjpeg: Huffman tables - * rv10: additional flags - * mpeg4: global headers (they can be in the bitstream or here) - * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger - * than extradata_size to avoid prolems if it is read with the bitstream reader. - * The bytewise contents of extradata must not depend on the architecture or CPU endianness. - * - encoding: Set/allocated/freed by libavcodec. - * - decoding: Set/allocated/freed by user. - */ - uint8_t *extradata; - int extradata_size; - - /** - * This is the fundamental unit of time (in seconds) in terms - * of which frame timestamps are represented. For fixed-fps content, - * timebase should be 1/framerate and timestamp increments should be - * identically 1. - * - encoding: MUST be set by user. - * - decoding: Set by libavcodec. - */ - AVRational time_base; - - /** - * For some codecs, the time base is closer to the field rate than the frame rate. - * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration - * if no telecine is used ... - * - * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2. - */ - int ticks_per_frame; - - /** - * Codec delay. - * - * Video: - * Number of frames the decoded output will be delayed relative to the - * encoded input. - * - * Audio: - * For encoding, this is the number of "priming" samples added 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: Set by libavcodec. - */ - int delay; - - - /* video only */ - /** - * picture width / height. - * - encoding: MUST be set by user. - * - decoding: Set by libavcodec. - * Note: For compatibility it is possible to set this instead of - * coded_width/height before decoding. - */ - int width, height; - - /** - * 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 coded_width, coded_height; - -#define FF_ASPECT_EXTENDED 15 - - /** - * the number of pictures in a group of pictures, or 0 for intra_only - * - encoding: Set by user. - * - decoding: unused - */ - int gop_size; - - /** - * Pixel format, see 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 AVPixelFormat pix_fmt; - - /** - * Motion estimation algorithm used for video coding. - * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex), - * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific] - * - encoding: MUST be set by user. - * - decoding: unused - */ - int me_method; - - /** - * If non NULL, 'draw_horiz_band' is called by the libavcodec - * decoder to draw a horizontal band. It improves cache usage. Not - * all codecs can do that. You must check the codec capabilities - * beforehand. - * When multithreading is used, it may be called from multiple threads - * at the same time; threads might draw different parts of the same AVFrame, - * or multiple AVFrames, and there is no guarantee that slices will be drawn - * in order. - * The function is also used by hardware acceleration APIs. - * It is called at least once during frame decoding to pass - * the data needed for hardware render. - * In that mode instead of pixel data, AVFrame points to - * a structure specific to the acceleration API. The application - * reads the structure and can change some fields to indicate progress - * or mark state. - * - encoding: unused - * - decoding: Set by user. - * @param height the height of the slice - * @param y the y position of the slice - * @param type 1->top field, 2->bottom field, 3->frame - * @param offset offset into the AVFrame.data from which the slice should be read - */ - void (*draw_horiz_band)(struct AVCodecContext *s, - const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], - int y, int type, int height); - - /** - * callback to negotiate the pixelFormat - * @param fmt is the list of formats which are supported by the codec, - * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. - * The first is always the native one. - * @return the chosen format - * - encoding: unused - * - decoding: Set by user, if not set the native format will be chosen. - */ - enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt); - - /** - * maximum number of B-frames between non-B-frames - * Note: The output will be delayed by max_b_frames+1 relative to the input. - * - encoding: Set by user. - * - decoding: unused - */ - int max_b_frames; - - /** - * qscale factor between IP and B-frames - * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset). - * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset). - * - encoding: Set by user. - * - decoding: unused - */ - float b_quant_factor; - - /** obsolete FIXME remove */ - int rc_strategy; -#define FF_RC_STRATEGY_XVID 1 - - int b_frame_strategy; - -#if FF_API_MPV_GLOBAL_OPTS - /** - * luma single coefficient elimination threshold - * - encoding: Set by user. - * - decoding: unused - */ - attribute_deprecated int luma_elim_threshold; - - /** - * chroma single coeff elimination threshold - * - encoding: Set by user. - * - decoding: unused - */ - attribute_deprecated int chroma_elim_threshold; -#endif - - /** - * qscale offset between IP and B-frames - * - encoding: Set by user. - * - decoding: unused - */ - float b_quant_offset; - - /** - * Size of the frame reordering buffer in the decoder. - * For MPEG-2 it is 1 IPB or 0 low delay IP. - * - encoding: Set by libavcodec. - * - decoding: Set by libavcodec. - */ - int has_b_frames; - - /** - * 0-> h263 quant 1-> mpeg quant - * - encoding: Set by user. - * - decoding: unused - */ - int mpeg_quant; - - /** - * qscale factor between P and I-frames - * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset). - * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset). - * - encoding: Set by user. - * - decoding: unused - */ - float i_quant_factor; - - /** - * qscale offset between P and I-frames - * - encoding: Set by user. - * - decoding: unused - */ - float i_quant_offset; - - /** - * luminance masking (0-> disabled) - * - encoding: Set by user. - * - decoding: unused - */ - float lumi_masking; - - /** - * temporary complexity masking (0-> disabled) - * - encoding: Set by user. - * - decoding: unused - */ - float temporal_cplx_masking; - - /** - * spatial complexity masking (0-> disabled) - * - encoding: Set by user. - * - decoding: unused - */ - float spatial_cplx_masking; - - /** - * p block masking (0-> disabled) - * - encoding: Set by user. - * - decoding: unused - */ - float p_masking; - - /** - * darkness masking (0-> disabled) - * - encoding: Set by user. - * - decoding: unused - */ - float dark_masking; - - /** - * slice count - * - encoding: Set by libavcodec. - * - decoding: Set by user (or 0). - */ - int slice_count; - /** - * prediction method (needed for huffyuv) - * - encoding: Set by user. - * - decoding: unused - */ - int prediction_method; -#define FF_PRED_LEFT 0 -#define FF_PRED_PLANE 1 -#define FF_PRED_MEDIAN 2 - - /** - * slice offsets in the frame in bytes - * - encoding: Set/allocated by libavcodec. - * - decoding: Set/allocated by user (or NULL). - */ - int *slice_offset; - - /** - * sample aspect ratio (0 if unknown) - * That is the width of a pixel divided by the height of the pixel. - * Numerator and denominator must be relatively prime and smaller than 256 for some video standards. - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - AVRational sample_aspect_ratio; - - /** - * motion estimation comparison function - * - encoding: Set by user. - * - decoding: unused - */ - int me_cmp; - /** - * subpixel motion estimation comparison function - * - encoding: Set by user. - * - decoding: unused - */ - int me_sub_cmp; - /** - * macroblock comparison function (not supported yet) - * - encoding: Set by user. - * - decoding: unused - */ - int mb_cmp; - /** - * interlaced DCT comparison function - * - encoding: Set by user. - * - decoding: unused - */ - int ildct_cmp; -#define FF_CMP_SAD 0 -#define FF_CMP_SSE 1 -#define FF_CMP_SATD 2 -#define FF_CMP_DCT 3 -#define FF_CMP_PSNR 4 -#define FF_CMP_BIT 5 -#define FF_CMP_RD 6 -#define FF_CMP_ZERO 7 -#define FF_CMP_VSAD 8 -#define FF_CMP_VSSE 9 -#define FF_CMP_NSSE 10 -#define FF_CMP_W53 11 -#define FF_CMP_W97 12 -#define FF_CMP_DCTMAX 13 -#define FF_CMP_DCT264 14 -#define FF_CMP_CHROMA 256 - - /** - * ME diamond size & shape - * - encoding: Set by user. - * - decoding: unused - */ - int dia_size; - - /** - * amount of previous MV predictors (2a+1 x 2a+1 square) - * - encoding: Set by user. - * - decoding: unused - */ - int last_predictor_count; - - /** - * prepass for motion estimation - * - encoding: Set by user. - * - decoding: unused - */ - int pre_me; - - /** - * motion estimation prepass comparison function - * - encoding: Set by user. - * - decoding: unused - */ - int me_pre_cmp; - - /** - * ME prepass diamond size & shape - * - encoding: Set by user. - * - decoding: unused - */ - int pre_dia_size; - - /** - * subpel ME quality - * - encoding: Set by user. - * - decoding: unused - */ - int me_subpel_quality; - - /** - * DTG active format information (additional aspect ratio - * information only used in DVB MPEG-2 transport streams) - * 0 if not set. - * - * - encoding: unused - * - decoding: Set by decoder. - */ - int dtg_active_format; -#define FF_DTG_AFD_SAME 8 -#define FF_DTG_AFD_4_3 9 -#define FF_DTG_AFD_16_9 10 -#define FF_DTG_AFD_14_9 11 -#define FF_DTG_AFD_4_3_SP_14_9 13 -#define FF_DTG_AFD_16_9_SP_14_9 14 -#define FF_DTG_AFD_SP_4_3 15 - - /** - * maximum motion estimation search range in subpel units - * If 0 then no limit. - * - * - encoding: Set by user. - * - decoding: unused - */ - int me_range; - - /** - * intra quantizer bias - * - encoding: Set by user. - * - decoding: unused - */ - int intra_quant_bias; -#define FF_DEFAULT_QUANT_BIAS 999999 - - /** - * inter quantizer bias - * - encoding: Set by user. - * - decoding: unused - */ - int inter_quant_bias; - -#if FF_API_COLOR_TABLE_ID - /** - * color table ID - * - encoding: unused - * - decoding: Which clrtable should be used for 8bit RGB images. - * Tables have to be stored somewhere. FIXME - */ - attribute_deprecated int color_table_id; -#endif - - /** - * slice flags - * - encoding: unused - * - decoding: Set by user. - */ - int slice_flags; -#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display -#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics) -#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1) - - /** - * XVideo Motion Acceleration - * - encoding: forbidden - * - decoding: set by decoder - */ - int xvmc_acceleration; - - /** - * macroblock decision mode - * - encoding: Set by user. - * - decoding: unused - */ - int mb_decision; -#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp -#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits -#define FF_MB_DECISION_RD 2 ///< rate distortion - - /** - * custom intra quantization matrix - * - encoding: Set by user, can be NULL. - * - decoding: Set by libavcodec. - */ - uint16_t *intra_matrix; - - /** - * custom inter quantization matrix - * - encoding: Set by user, can be NULL. - * - decoding: Set by libavcodec. - */ - uint16_t *inter_matrix; - - /** - * scene change detection threshold - * 0 is default, larger means fewer detected scene changes. - * - encoding: Set by user. - * - decoding: unused - */ - int scenechange_threshold; - - /** - * noise reduction strength - * - encoding: Set by user. - * - decoding: unused - */ - int noise_reduction; - -#if FF_API_INTER_THRESHOLD - /** - * @deprecated this field is unused - */ - attribute_deprecated int inter_threshold; -#endif - -#if FF_API_MPV_GLOBAL_OPTS - /** - * @deprecated use mpegvideo private options instead - */ - attribute_deprecated int quantizer_noise_shaping; -#endif - - /** - * Motion estimation threshold below which no motion estimation is - * performed, but instead the user specified motion vectors are used. - * - * - encoding: Set by user. - * - decoding: unused - */ - int me_threshold; - - /** - * Macroblock threshold below which the user specified macroblock types will be used. - * - encoding: Set by user. - * - decoding: unused - */ - int mb_threshold; - - /** - * precision of the intra DC coefficient - 8 - * - encoding: Set by user. - * - decoding: unused - */ - int intra_dc_precision; - - /** - * Number of macroblock rows at the top which are skipped. - * - encoding: unused - * - decoding: Set by user. - */ - int skip_top; - - /** - * Number of macroblock rows at the bottom which are skipped. - * - encoding: unused - * - decoding: Set by user. - */ - int skip_bottom; - - /** - * Border processing masking, raises the quantizer for mbs on the borders - * of the picture. - * - encoding: Set by user. - * - decoding: unused - */ - float border_masking; - - /** - * minimum MB lagrange multipler - * - encoding: Set by user. - * - decoding: unused - */ - int mb_lmin; - - /** - * maximum MB lagrange multipler - * - encoding: Set by user. - * - decoding: unused - */ - int mb_lmax; - - /** - * - * - encoding: Set by user. - * - decoding: unused - */ - int me_penalty_compensation; - - /** - * - * - encoding: Set by user. - * - decoding: unused - */ - int bidir_refine; - - /** - * - * - encoding: Set by user. - * - decoding: unused - */ - int brd_scale; - - /** - * minimum GOP size - * - encoding: Set by user. - * - decoding: unused - */ - int keyint_min; - - /** - * number of reference frames - * - encoding: Set by user. - * - decoding: Set by lavc. - */ - int refs; - - /** - * chroma qp offset from luma - * - encoding: Set by user. - * - decoding: unused - */ - int chromaoffset; - - /** - * Multiplied by qscale for each frame and added to scene_change_score. - * - encoding: Set by user. - * - decoding: unused - */ - int scenechange_factor; - - /** - * - * Note: Value depends upon the compare function used for fullpel ME. - * - encoding: Set by user. - * - decoding: unused - */ - int mv0_threshold; - - /** - * Adjust sensitivity of b_frame_strategy 1. - * - encoding: Set by user. - * - decoding: unused - */ - int b_sensitivity; - - /** - * Chromaticity coordinates of the source primaries. - * - encoding: Set by user - * - decoding: Set by libavcodec - */ - enum AVColorPrimaries color_primaries; - - /** - * Color Transfer Characteristic. - * - encoding: Set by user - * - decoding: Set by libavcodec - */ - enum AVColorTransferCharacteristic color_trc; - - /** - * YUV colorspace type. - * - encoding: Set by user - * - decoding: Set by libavcodec - */ - enum AVColorSpace colorspace; - - /** - * MPEG vs JPEG YUV range. - * - encoding: Set by user - * - decoding: Set by libavcodec - */ - enum AVColorRange color_range; - - /** - * This defines the location of chroma samples. - * - encoding: Set by user - * - decoding: Set by libavcodec - */ - enum AVChromaLocation chroma_sample_location; - - /** - * Number of slices. - * Indicates number of picture subdivisions. Used for parallelized - * decoding. - * - encoding: Set by user - * - decoding: unused - */ - int slices; - - /** Field order - * - encoding: set by libavcodec - * - decoding: Set by libavcodec - */ - enum AVFieldOrder field_order; - - /* audio only */ - int sample_rate; ///< samples per second - int channels; ///< number of audio channels - - /** - * audio sample format - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - enum AVSampleFormat sample_fmt; ///< sample format - - /* The following data should not be initialized. */ - /** - * Number of samples per channel in an audio frame. - * - * - encoding: set by libavcodec in avcodec_open2(). Each submitted frame - * except the last must contain exactly frame_size samples per channel. - * May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, then the - * frame size is not restricted. - * - decoding: may be set by some decoders to indicate constant frame size - */ - int frame_size; - - /** - * Frame counter, set by libavcodec. - * - * - decoding: total number of frames returned from the decoder so far. - * - encoding: total number of frames passed to the encoder so far. - * - * @note the counter is not incremented if encoding/decoding resulted in - * an error. - */ - int frame_number; - - /** - * number of bytes per packet if constant and known or 0 - * Used by some WAV based audio codecs. - */ - int block_align; - - /** - * Audio cutoff bandwidth (0 means "automatic") - * - encoding: Set by user. - * - decoding: unused - */ - int cutoff; - -#if FF_API_REQUEST_CHANNELS - /** - * Decoder should decode to this many channels if it can (0 for default) - * - encoding: unused - * - decoding: Set by user. - * @deprecated Deprecated in favor of request_channel_layout. - */ - int request_channels; -#endif - - /** - * Audio channel layout. - * - encoding: set by user. - * - decoding: set by libavcodec. - */ - uint64_t channel_layout; - - /** - * Request decoder to use this channel layout if it can (0 for default) - * - encoding: unused - * - decoding: Set by user. - */ - uint64_t request_channel_layout; - - /** - * Type of service that the audio stream conveys. - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - enum AVAudioServiceType audio_service_type; - - /** - * Used to request a sample format from the decoder. - * - encoding: unused. - * - decoding: Set by user. - */ - enum AVSampleFormat request_sample_fmt; - - /** - * Called at the beginning of each frame to get a buffer for it. - * - * The function will set AVFrame.data[], AVFrame.linesize[]. - * AVFrame.extended_data[] must also be set, but it should be the same as - * AVFrame.data[] except for planar audio with more channels than can fit - * in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as - * many data pointers as it can hold. - * - * if CODEC_CAP_DR1 is not set then get_buffer() must call - * avcodec_default_get_buffer() instead of providing buffers allocated by - * some other means. - * - * AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't - * need it. avcodec_default_get_buffer() aligns the output buffer properly, - * but if get_buffer() is overridden then alignment considerations should - * be taken into account. - * - * @see avcodec_default_get_buffer() - * - * Video: - * - * If pic.reference is set then the frame will be read later by libavcodec. - * avcodec_align_dimensions2() should be used to find the required width and - * height, as they normally need to be rounded up to the next multiple of 16. - * - * If frame multithreading is used and thread_safe_callbacks is set, - * it may be called from a different thread, but not from more than one at - * once. Does not need to be reentrant. - * - * @see release_buffer(), reget_buffer() - * @see avcodec_align_dimensions2() - * - * Audio: - * - * Decoders request a buffer of a particular size by setting - * AVFrame.nb_samples prior to calling get_buffer(). The decoder may, - * however, utilize only part of the buffer by setting AVFrame.nb_samples - * to a smaller value in the output frame. - * - * Decoders cannot use the buffer after returning from - * avcodec_decode_audio4(), so they will not call release_buffer(), as it - * is assumed to be released immediately upon return. In some rare cases, - * a decoder may need to call get_buffer() more than once in a single - * call to avcodec_decode_audio4(). In that case, when get_buffer() is - * called again after it has already been called once, the previously - * acquired buffer is assumed to be released at that time and may not be - * reused by the decoder. - * - * As a convenience, av_samples_get_buffer_size() and - * av_samples_fill_arrays() in libavutil may be used by custom get_buffer() - * functions to find the required data size and to fill data pointers and - * linesize. In AVFrame.linesize, only linesize[0] may be set for audio - * since all planes must be the same size. - * - * @see av_samples_get_buffer_size(), av_samples_fill_arrays() - * - * - encoding: unused - * - decoding: Set by libavcodec, user can override. - */ - int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic); - - /** - * Called to release buffers which were allocated with get_buffer. - * A released buffer can be reused in get_buffer(). - * pic.data[*] must be set to NULL. - * May be called from a different thread if frame multithreading is used, - * but not by more than one thread at once, so does not need to be reentrant. - * - encoding: unused - * - decoding: Set by libavcodec, user can override. - */ - void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic); - - /** - * Called at the beginning of a frame to get cr buffer for it. - * Buffer type (size, hints) must be the same. libavcodec won't check it. - * libavcodec will pass previous buffer in pic, function should return - * same buffer or new buffer with old frame "painted" into it. - * If pic.data[0] == NULL must behave like get_buffer(). - * if CODEC_CAP_DR1 is not set then reget_buffer() must call - * avcodec_default_reget_buffer() instead of providing buffers allocated by - * some other means. - * - encoding: unused - * - decoding: Set by libavcodec, user can override. - */ - int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic); - - - /* - encoding parameters */ - float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0) - float qblur; ///< amount of qscale smoothing over time (0.0-1.0) - - /** - * minimum quantizer - * - encoding: Set by user. - * - decoding: unused - */ - int qmin; - - /** - * maximum quantizer - * - encoding: Set by user. - * - decoding: unused - */ - int qmax; - - /** - * maximum quantizer difference between frames - * - encoding: Set by user. - * - decoding: unused - */ - int max_qdiff; - - /** - * ratecontrol qmin qmax limiting method - * 0-> clipping, 1-> use a nice continuous function to limit qscale wthin qmin/qmax. - * - encoding: Set by user. - * - decoding: unused - */ - float rc_qsquish; - - float rc_qmod_amp; - int rc_qmod_freq; - - /** - * decoder bitstream buffer size - * - encoding: Set by user. - * - decoding: unused - */ - int rc_buffer_size; - - /** - * ratecontrol override, see RcOverride - * - encoding: Allocated/set/freed by user. - * - decoding: unused - */ - int rc_override_count; - RcOverride *rc_override; - - /** - * rate control equation - * - encoding: Set by user - * - decoding: unused - */ - const char *rc_eq; - - /** - * maximum bitrate - * - encoding: Set by user. - * - decoding: unused - */ - int rc_max_rate; - - /** - * minimum bitrate - * - encoding: Set by user. - * - decoding: unused - */ - int rc_min_rate; - - float rc_buffer_aggressivity; - - /** - * initial complexity for pass1 ratecontrol - * - encoding: Set by user. - * - decoding: unused - */ - float rc_initial_cplx; - - /** - * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow. - * - encoding: Set by user. - * - decoding: unused. - */ - float rc_max_available_vbv_use; - - /** - * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow. - * - encoding: Set by user. - * - decoding: unused. - */ - float rc_min_vbv_overflow_use; - - /** - * Number of bits which should be loaded into the rc buffer before decoding starts. - * - encoding: Set by user. - * - decoding: unused - */ - int rc_initial_buffer_occupancy; - -#define FF_CODER_TYPE_VLC 0 -#define FF_CODER_TYPE_AC 1 -#define FF_CODER_TYPE_RAW 2 -#define FF_CODER_TYPE_RLE 3 -#define FF_CODER_TYPE_DEFLATE 4 - /** - * coder type - * - encoding: Set by user. - * - decoding: unused - */ - int coder_type; - - /** - * context model - * - encoding: Set by user. - * - decoding: unused - */ - int context_model; - - /** - * minimum Lagrange multipler - * - encoding: Set by user. - * - decoding: unused - */ - int lmin; - - /** - * maximum Lagrange multipler - * - encoding: Set by user. - * - decoding: unused - */ - int lmax; - - /** - * frame skip threshold - * - encoding: Set by user. - * - decoding: unused - */ - int frame_skip_threshold; - - /** - * frame skip factor - * - encoding: Set by user. - * - decoding: unused - */ - int frame_skip_factor; - - /** - * frame skip exponent - * - encoding: Set by user. - * - decoding: unused - */ - int frame_skip_exp; - - /** - * frame skip comparison function - * - encoding: Set by user. - * - decoding: unused - */ - int frame_skip_cmp; - - /** - * trellis RD quantization - * - encoding: Set by user. - * - decoding: unused - */ - int trellis; - - /** - * - encoding: Set by user. - * - decoding: unused - */ - int min_prediction_order; - - /** - * - encoding: Set by user. - * - decoding: unused - */ - int max_prediction_order; - - /** - * GOP timecode frame start number, in non drop frame format - * - encoding: Set by user. - * - decoding: unused - */ - int64_t timecode_frame_start; - - /* The RTP callback: This function is called */ - /* every time the encoder has a packet to send. */ - /* It depends on the encoder if the data starts */ - /* with a Start Code (it should). H.263 does. */ - /* mb_nb contains the number of macroblocks */ - /* encoded in the RTP payload. */ - void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb); - - int rtp_payload_size; /* The size of the RTP payload: the coder will */ - /* do its best to deliver a chunk with size */ - /* below rtp_payload_size, the chunk will start */ - /* with a start code on some codecs like H.263. */ - /* This doesn't take account of any particular */ - /* headers inside the transmitted RTP payload. */ - - /* statistics, used for 2-pass encoding */ - int mv_bits; - int header_bits; - int i_tex_bits; - int p_tex_bits; - int i_count; - int p_count; - int skip_count; - int misc_bits; - - /** - * number of bits used for the previously encoded frame - * - encoding: Set by libavcodec. - * - decoding: unused - */ - int frame_bits; - - /** - * pass1 encoding statistics output buffer - * - encoding: Set by libavcodec. - * - decoding: unused - */ - char *stats_out; - - /** - * pass2 encoding statistics input buffer - * Concatenated stuff from stats_out of pass1 should be placed here. - * - encoding: Allocated/set/freed by user. - * - decoding: unused - */ - char *stats_in; - - /** - * Work around bugs in encoders which sometimes cannot be detected automatically. - * - encoding: Set by user - * - decoding: Set by user - */ - int workaround_bugs; -#define FF_BUG_AUTODETECT 1 ///< autodetection -#define FF_BUG_OLD_MSMPEG4 2 -#define FF_BUG_XVID_ILACE 4 -#define FF_BUG_UMP4 8 -#define FF_BUG_NO_PADDING 16 -#define FF_BUG_AMV 32 -#define FF_BUG_AC_VLC 0 ///< Will be removed, libavcodec can now handle these non-compliant files by default. -#define FF_BUG_QPEL_CHROMA 64 -#define FF_BUG_STD_QPEL 128 -#define FF_BUG_QPEL_CHROMA2 256 -#define FF_BUG_DIRECT_BLOCKSIZE 512 -#define FF_BUG_EDGE 1024 -#define FF_BUG_HPEL_CHROMA 2048 -#define FF_BUG_DC_CLIP 4096 -#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders. -#define FF_BUG_TRUNCATED 16384 - - /** - * strictly follow the standard (MPEG4, ...). - * - encoding: Set by user. - * - decoding: Set by user. - * Setting this to STRICT or higher means the encoder and decoder will - * generally do stupid things, whereas setting it to unofficial or lower - * will mean the encoder might produce output that is not supported by all - * spec-compliant decoders. Decoders don't differentiate between normal, - * unofficial and experimental (that is, they always try to decode things - * when they can) unless they are explicitly asked to behave stupidly - * (=strictly conform to the specs) - */ - int strict_std_compliance; -#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software. -#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences. -#define FF_COMPLIANCE_NORMAL 0 -#define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions -#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things. - - /** - * error concealment flags - * - encoding: unused - * - decoding: Set by user. - */ - int error_concealment; -#define FF_EC_GUESS_MVS 1 -#define FF_EC_DEBLOCK 2 - - /** - * debug - * - encoding: Set by user. - * - decoding: Set by user. - */ - int debug; -#define FF_DEBUG_PICT_INFO 1 -#define FF_DEBUG_RC 2 -#define FF_DEBUG_BITSTREAM 4 -#define FF_DEBUG_MB_TYPE 8 -#define FF_DEBUG_QP 16 -#define FF_DEBUG_MV 32 -#define FF_DEBUG_DCT_COEFF 0x00000040 -#define FF_DEBUG_SKIP 0x00000080 -#define FF_DEBUG_STARTCODE 0x00000100 -#define FF_DEBUG_PTS 0x00000200 -#define FF_DEBUG_ER 0x00000400 -#define FF_DEBUG_MMCO 0x00000800 -#define FF_DEBUG_BUGS 0x00001000 -#define FF_DEBUG_VIS_QP 0x00002000 -#define FF_DEBUG_VIS_MB_TYPE 0x00004000 -#define FF_DEBUG_BUFFERS 0x00008000 -#define FF_DEBUG_THREADS 0x00010000 - - /** - * debug - * - encoding: Set by user. - * - decoding: Set by user. - */ - int debug_mv; -#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames -#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames -#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames - - /** - * Error recognition; may misdetect some more or less valid parts as errors. - * - encoding: unused - * - decoding: Set by user. - */ - int err_recognition; -#define AV_EF_CRCCHECK (1<<0) -#define AV_EF_BITSTREAM (1<<1) -#define AV_EF_BUFFER (1<<2) -#define AV_EF_EXPLODE (1<<3) - - /** - * opaque 64bit number (generally a PTS) that will be reordered and - * output in AVFrame.reordered_opaque - * @deprecated in favor of pkt_pts - * - encoding: unused - * - decoding: Set by user. - */ - int64_t reordered_opaque; - - /** - * Hardware accelerator in use - * - encoding: unused. - * - decoding: Set by libavcodec - */ - struct AVHWAccel *hwaccel; - - /** - * Hardware accelerator context. - * For some hardware accelerators, a global context needs to be - * provided by the user. In that case, this holds display-dependent - * data Libav cannot instantiate itself. Please refer to the - * Libav HW accelerator documentation to know how to fill this - * is. e.g. for VA API, this is a struct vaapi_context. - * - encoding: unused - * - decoding: Set by user - */ - void *hwaccel_context; - - /** - * error - * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR. - * - decoding: unused - */ - uint64_t error[AV_NUM_DATA_POINTERS]; - - /** - * DCT algorithm, see FF_DCT_* below - * - encoding: Set by user. - * - decoding: unused - */ - int dct_algo; -#define FF_DCT_AUTO 0 -#define FF_DCT_FASTINT 1 -#define FF_DCT_INT 2 -#define FF_DCT_MMX 3 -#define FF_DCT_ALTIVEC 5 -#define FF_DCT_FAAN 6 - - /** - * IDCT algorithm, see FF_IDCT_* below. - * - encoding: Set by user. - * - decoding: Set by user. - */ - int idct_algo; -#define FF_IDCT_AUTO 0 -#define FF_IDCT_INT 1 -#define FF_IDCT_SIMPLE 2 -#define FF_IDCT_SIMPLEMMX 3 -#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_SIMPLEARM 10 -#define FF_IDCT_H264 11 -#define FF_IDCT_VP3 12 -#define FF_IDCT_IPP 13 -#define FF_IDCT_XVIDMMX 14 -#define FF_IDCT_CAVS 15 -#define FF_IDCT_SIMPLEARMV5TE 16 -#define FF_IDCT_SIMPLEARMV6 17 -#define FF_IDCT_SIMPLEVIS 18 -#define FF_IDCT_WMV2 19 -#define FF_IDCT_FAAN 20 -#define FF_IDCT_EA 21 -#define FF_IDCT_SIMPLENEON 22 -#define FF_IDCT_SIMPLEALPHA 23 -#define FF_IDCT_BINK 24 - -#if FF_API_DSP_MASK - /** - * Unused. - * @deprecated use av_set_cpu_flags_mask() instead. - */ - attribute_deprecated unsigned dsp_mask; -#endif - - /** - * bits per sample/pixel from the demuxer (needed for huffyuv). - * - encoding: Set by libavcodec. - * - decoding: Set by user. - */ - int bits_per_coded_sample; - - /** - * Bits per sample/pixel of internal libavcodec pixel/sample format. - * - encoding: set by user. - * - decoding: set by libavcodec. - */ - int bits_per_raw_sample; - - /** - * low resolution decoding, 1-> 1/2 size, 2->1/4 size - * - encoding: unused - * - decoding: Set by user. - */ - attribute_deprecated int lowres; - - /** - * the picture in the bitstream - * - encoding: Set by libavcodec. - * - decoding: Set by libavcodec. - */ - AVFrame *coded_frame; - - /** - * thread count - * is used to decide how many independent tasks should be passed to execute() - * - encoding: Set by user. - * - decoding: Set by user. - */ - int thread_count; - - /** - * Which multithreading methods to use. - * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread, - * so clients which cannot provide future frames should not use it. - * - * - encoding: Set by user, otherwise the default is used. - * - decoding: Set by user, otherwise the default is used. - */ - int thread_type; -#define FF_THREAD_FRAME 1 ///< Decode more than one frame at once -#define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once - - /** - * Which multithreading methods are in use by the codec. - * - encoding: Set by libavcodec. - * - decoding: Set by libavcodec. - */ - int active_thread_type; - - /** - * Set by the client if its custom get_buffer() callback can be called - * synchronously from another thread, which allows faster multithreaded decoding. - * draw_horiz_band() will be called from other threads regardless of this setting. - * Ignored if the default get_buffer() is used. - * - encoding: Set by user. - * - decoding: Set by user. - */ - int thread_safe_callbacks; - - /** - * The codec may call this to execute several independent things. - * It will return only after finishing all tasks. - * The user may replace this with some multithreaded implementation, - * the default implementation will execute the parts serially. - * @param count the number of things to execute - * - encoding: Set by libavcodec, user can override. - * - decoding: Set by libavcodec, user can override. - */ - int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size); - - /** - * The codec may call this to execute several independent things. - * It will return only after finishing all tasks. - * The user may replace this with some multithreaded implementation, - * the default implementation will execute the parts serially. - * Also see avcodec_thread_init and e.g. the --enable-pthread configure option. - * @param c context passed also to func - * @param count the number of things to execute - * @param arg2 argument passed unchanged to func - * @param ret return values of executed functions, must have space for "count" values. May be NULL. - * @param func function that will be called count times, with jobnr from 0 to count-1. - * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no - * two instances of func executing at the same time will have the same threadnr. - * @return always 0 currently, but code should handle a future improvement where when any call to func - * returns < 0 no further calls to func may be done and < 0 is returned. - * - encoding: Set by libavcodec, user can override. - * - decoding: Set by libavcodec, user can override. - */ - int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count); - - /** - * thread opaque - * Can be used by execute() to store some per AVCodecContext stuff. - * - encoding: set by execute() - * - decoding: set by execute() - */ - void *thread_opaque; - - /** - * noise vs. sse weight for the nsse comparsion function - * - encoding: Set by user. - * - decoding: unused - */ - int nsse_weight; - - /** - * profile - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - int profile; -#define FF_PROFILE_UNKNOWN -99 -#define FF_PROFILE_RESERVED -100 - -#define FF_PROFILE_AAC_MAIN 0 -#define FF_PROFILE_AAC_LOW 1 -#define FF_PROFILE_AAC_SSR 2 -#define FF_PROFILE_AAC_LTP 3 -#define FF_PROFILE_AAC_HE 4 -#define FF_PROFILE_AAC_HE_V2 28 -#define FF_PROFILE_AAC_LD 22 -#define FF_PROFILE_AAC_ELD 38 - -#define FF_PROFILE_DTS 20 -#define FF_PROFILE_DTS_ES 30 -#define FF_PROFILE_DTS_96_24 40 -#define FF_PROFILE_DTS_HD_HRA 50 -#define FF_PROFILE_DTS_HD_MA 60 - -#define FF_PROFILE_MPEG2_422 0 -#define FF_PROFILE_MPEG2_HIGH 1 -#define FF_PROFILE_MPEG2_SS 2 -#define FF_PROFILE_MPEG2_SNR_SCALABLE 3 -#define FF_PROFILE_MPEG2_MAIN 4 -#define FF_PROFILE_MPEG2_SIMPLE 5 - -#define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag -#define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag - -#define FF_PROFILE_H264_BASELINE 66 -#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED) -#define FF_PROFILE_H264_MAIN 77 -#define FF_PROFILE_H264_EXTENDED 88 -#define FF_PROFILE_H264_HIGH 100 -#define FF_PROFILE_H264_HIGH_10 110 -#define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA) -#define FF_PROFILE_H264_HIGH_422 122 -#define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA) -#define FF_PROFILE_H264_HIGH_444 144 -#define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244 -#define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA) -#define FF_PROFILE_H264_CAVLC_444 44 - -#define FF_PROFILE_VC1_SIMPLE 0 -#define FF_PROFILE_VC1_MAIN 1 -#define FF_PROFILE_VC1_COMPLEX 2 -#define FF_PROFILE_VC1_ADVANCED 3 - -#define FF_PROFILE_MPEG4_SIMPLE 0 -#define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1 -#define FF_PROFILE_MPEG4_CORE 2 -#define FF_PROFILE_MPEG4_MAIN 3 -#define FF_PROFILE_MPEG4_N_BIT 4 -#define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5 -#define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6 -#define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7 -#define FF_PROFILE_MPEG4_HYBRID 8 -#define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9 -#define FF_PROFILE_MPEG4_CORE_SCALABLE 10 -#define FF_PROFILE_MPEG4_ADVANCED_CODING 11 -#define FF_PROFILE_MPEG4_ADVANCED_CORE 12 -#define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13 -#define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14 -#define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15 - - /** - * level - * - encoding: Set by user. - * - decoding: Set by libavcodec. - */ - int level; -#define FF_LEVEL_UNKNOWN -99 - - /** - * - * - encoding: unused - * - decoding: Set by user. - */ - enum AVDiscard skip_loop_filter; - - /** - * - * - encoding: unused - * - decoding: Set by user. - */ - enum AVDiscard skip_idct; - - /** - * - * - encoding: unused - * - decoding: Set by user. - */ - enum AVDiscard skip_frame; - - /** - * Header containing style information for text subtitles. - * For SUBTITLE_ASS subtitle type, it should contain the whole ASS - * [Script Info] and [V4+ Styles] section, plus the [Events] line and - * the Format line following. It shouldn't include any Dialogue line. - * - encoding: Set/allocated/freed by user (before avcodec_open2()) - * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2()) - */ - uint8_t *subtitle_header; - int subtitle_header_size; - - /** - * Simulates errors in the bitstream to test error concealment. - * - encoding: Set by user. - * - decoding: unused - */ - int error_rate; - - /** - * Current packet as passed into the decoder, to avoid having - * to pass the packet into every function. Currently only valid - * inside lavc and get/release_buffer callbacks. - * - decoding: set by avcodec_decode_*, read by get_buffer() for setting pkt_pts - * - encoding: unused - */ - AVPacket *pkt; - - /** - * VBV delay coded in the last frame (in periods of a 27 MHz clock). - * Used for compliant TS muxing. - * - encoding: Set by libavcodec. - * - decoding: unused. - */ - uint64_t vbv_delay; -} AVCodecContext; - -/** - * AVProfile. - */ -typedef struct AVProfile { - int profile; - const char *name; ///< short name for the profile -} AVProfile; - -typedef struct AVCodecDefault AVCodecDefault; - -struct AVSubtitle; - -/** - * AVCodec. - */ -typedef struct AVCodec { - /** - * Name of the codec implementation. - * The name is globally unique among encoders and among decoders (but an - * encoder and a decoder can share the same name). - * This is the primary way to find a codec from the user perspective. - */ - const char *name; - /** - * Descriptive name for the codec, meant to be more human readable than name. - * You should use the NULL_IF_CONFIG_SMALL() macro to define it. - */ - const char *long_name; - enum AVMediaType type; - enum AVCodecID id; - /** - * Codec capabilities. - * see CODEC_CAP_* - */ - int capabilities; - const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0} - const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1 - const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0 - const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1 - const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0 - 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} - - /***************************************************************** - * No fields below this line are part of the public API. They - * may not be used outside of libavcodec and can be changed and - * removed at will. - * New public fields should be added right above. - ***************************************************************** - */ - int priv_data_size; - struct AVCodec *next; - /** - * @name Frame-level threading support functions - * @{ - */ - /** - * If defined, called on thread contexts when they are created. - * If the codec allocates writable tables in init(), re-allocate them here. - * priv_data will be set to a copy of the original. - */ - int (*init_thread_copy)(AVCodecContext *); - /** - * Copy necessary context variables from a previous thread context to the current one. - * If not defined, the next thread will start automatically; otherwise, the codec - * must call ff_thread_finish_setup(). - * - * dst and src will (rarely) point to the same context, in which case memcpy should be skipped. - */ - int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src); - /** @} */ - - /** - * Private codec-specific defaults. - */ - const AVCodecDefault *defaults; - - /** - * Initialize codec static data, called from avcodec_register(). - */ - void (*init_static_data)(struct AVCodec *codec); - - int (*init)(AVCodecContext *); - int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size, - const struct AVSubtitle *sub); - /** - * Encode data to an AVPacket. - * - * @param avctx codec context - * @param avpkt output AVPacket (may contain a user-provided buffer) - * @param[in] frame AVFrame containing the raw data to be encoded - * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a - * non-empty packet was returned in avpkt. - * @return 0 on success, negative error code on failure - */ - int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, - int *got_packet_ptr); - int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt); - int (*close)(AVCodecContext *); - /** - * Flush buffers. - * Will be called when seeking - */ - void (*flush)(AVCodecContext *); -} AVCodec; - -/** - * AVHWAccel. - */ -typedef struct AVHWAccel { - /** - * Name of the hardware accelerated codec. - * The name is globally unique among encoders and among decoders (but an - * encoder and a decoder can share the same name). - */ - const char *name; - - /** - * Type of codec implemented by the hardware accelerator. - * - * See AVMEDIA_TYPE_xxx - */ - enum AVMediaType type; - - /** - * Codec implemented by the hardware accelerator. - * - * See AV_CODEC_ID_xxx - */ - enum AVCodecID id; - - /** - * Supported pixel format. - * - * Only hardware accelerated formats are supported here. - */ - enum AVPixelFormat pix_fmt; - - /** - * Hardware accelerated codec capabilities. - * see FF_HWACCEL_CODEC_CAP_* - */ - int capabilities; - - struct AVHWAccel *next; - - /** - * Called at the beginning of each frame or field picture. - * - * Meaningful frame information (codec specific) is guaranteed to - * be parsed at this point. This function is mandatory. - * - * Note that buf can be NULL along with buf_size set to 0. - * Otherwise, this means the whole frame is available at this point. - * - * @param avctx the codec context - * @param buf the frame data buffer base - * @param buf_size the size of the frame in bytes - * @return zero if successful, a negative value otherwise - */ - int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); - - /** - * Callback for each slice. - * - * Meaningful slice information (codec specific) is guaranteed to - * be parsed at this point. This function is mandatory. - * - * @param avctx the codec context - * @param buf the slice data buffer base - * @param buf_size the size of the slice in bytes - * @return zero if successful, a negative value otherwise - */ - int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size); - - /** - * Called at the end of each frame or field picture. - * - * The whole picture is parsed at this point and can now be sent - * to the hardware accelerator. This function is mandatory. - * - * @param avctx the codec context - * @return zero if successful, a negative value otherwise - */ - int (*end_frame)(AVCodecContext *avctx); - - /** - * Size of HW accelerator private data. - * - * Private data is allocated with av_mallocz() before - * AVCodecContext.get_buffer() and deallocated after - * AVCodecContext.release_buffer(). - */ - int priv_data_size; -} AVHWAccel; - -/** - * @defgroup lavc_picture AVPicture - * - * Functions for working with AVPicture - * @{ - */ - -/** - * four components are given, that's all. - * the last component is alpha - */ -typedef struct AVPicture { - uint8_t *data[AV_NUM_DATA_POINTERS]; - int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line -} AVPicture; - -/** - * @} - */ - -#define AVPALETTE_SIZE 1024 -#define AVPALETTE_COUNT 256 - -enum AVSubtitleType { - SUBTITLE_NONE, - - SUBTITLE_BITMAP, ///< A bitmap, pict will be set - - /** - * Plain text, the text field must be set by the decoder and is - * authoritative. ass and pict fields may contain approximations. - */ - SUBTITLE_TEXT, - - /** - * Formatted text, the ass field must be set by the decoder and is - * authoritative. pict and text fields may contain approximations. - */ - SUBTITLE_ASS, -}; - -#define AV_SUBTITLE_FLAG_FORCED 0x00000001 - -typedef struct AVSubtitleRect { - int x; ///< top left corner of pict, undefined when pict is not set - int y; ///< top left corner of pict, undefined when pict is not set - int w; ///< width of pict, undefined when pict is not set - int h; ///< height of pict, undefined when pict is not set - int nb_colors; ///< number of colors in pict, undefined when pict is not set - - /** - * data+linesize for the bitmap of this subtitle. - * can be set for text/ass as well once they where rendered - */ - AVPicture pict; - enum AVSubtitleType type; - - char *text; ///< 0 terminated plain UTF-8 text - - /** - * 0 terminated ASS/SSA compatible event line. - * The pressentation of this is unaffected by the other values in this - * struct. - */ - char *ass; - int flags; -} AVSubtitleRect; - -typedef struct AVSubtitle { - uint16_t format; /* 0 = graphics */ - uint32_t start_display_time; /* relative to packet pts, in ms */ - uint32_t end_display_time; /* relative to packet pts, in ms */ - unsigned num_rects; - AVSubtitleRect **rects; - int64_t pts; ///< Same as packet pts, in AV_TIME_BASE -} AVSubtitle; - -/** - * If c is NULL, returns the first registered codec, - * if c is non-NULL, returns the next registered codec after c, - * or NULL if c is the last one. - */ -AVCodec *av_codec_next(const AVCodec *c); - -/** - * Return the LIBAVCODEC_VERSION_INT constant. - */ -unsigned avcodec_version(void); - -/** - * Return the libavcodec build-time configuration. - */ -const char *avcodec_configuration(void); - -/** - * Return the libavcodec license. - */ -const char *avcodec_license(void); - -/** - * Register the codec codec and initialize libavcodec. - * - * @warning either this function or avcodec_register_all() must be called - * before any other libavcodec functions. - * - * @see avcodec_register_all() - */ -void avcodec_register(AVCodec *codec); - -/** - * Register all the codecs, parsers and bitstream filters which were enabled at - * configuration time. If you do not call this function you can select exactly - * which formats you want to support, by using the individual registration - * functions. - * - * @see avcodec_register - * @see av_register_codec_parser - * @see av_register_bitstream_filter - */ -void avcodec_register_all(void); - -/** - * Allocate an AVCodecContext and set its fields to default values. The - * resulting struct 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); - -/** - * @} - */ - -/** - * @addtogroup lavc_packet - * @{ - */ - -/** - * Default packet destructor. - */ -void av_destruct_packet(AVPacket *pkt); - -/** - * Initialize optional fields of a packet with default values. - * - * Note, this does not touch the data and size members, which have to be - * initialized separately. - * - * @param pkt packet - */ -void av_init_packet(AVPacket *pkt); - -/** - * Allocate the payload of a packet and initialize its fields with - * default values. - * - * @param pkt packet - * @param size wanted payload size - * @return 0 if OK, AVERROR_xxx otherwise - */ -int av_new_packet(AVPacket *pkt, int size); - -/** - * Reduce packet size, correctly zeroing padding - * - * @param pkt packet - * @param size new size - */ -void av_shrink_packet(AVPacket *pkt, int size); - -/** - * Increase packet size, correctly zeroing padding - * - * @param pkt packet - * @param grow_by number of bytes by which to increase the size of the packet - */ -int av_grow_packet(AVPacket *pkt, int grow_by); - -/** - * @warning This is a hack - the packet memory allocation stuff is broken. The - * packet is allocated if it was not really allocated. - */ -int av_dup_packet(AVPacket *pkt); - -/** - * Free a packet. - * - * @param pkt packet to free - */ -void av_free_packet(AVPacket *pkt); - -/** - * Allocate new information of a packet. - * - * @param pkt packet - * @param type side information type - * @param size side information size - * @return pointer to fresh allocated data or NULL otherwise - */ -uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, - int size); - -/** - * Shrink the already allocated side data buffer - * - * @param pkt packet - * @param type side information type - * @param size new side information size - * @return 0 on success, < 0 on failure - */ -int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, - int size); - -/** - * Get side information from packet. - * - * @param pkt packet - * @param type desired side information type - * @param size pointer for side information size to store (optional) - * @return pointer to data if present or NULL otherwise - */ -uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type, - int *size); - -/** - * @} - */ - -/** - * @addtogroup lavc_decoding - * @{ - */ - -/** - * Find a registered decoder with a matching codec ID. - * - * @param id AVCodecID of the requested decoder - * @return A decoder if one was found, NULL otherwise. - */ -AVCodec *avcodec_find_decoder(enum AVCodecID id); - -/** - * Find a registered decoder with the specified name. - * - * @param name name of the requested decoder - * @return A decoder if one was found, NULL otherwise. - */ -AVCodec *avcodec_find_decoder_by_name(const char *name); - -int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic); -void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic); -int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic); - -/** - * Return the amount of padding in pixels which the get_buffer callback must - * provide around the edge of the image for codecs which do not have the - * CODEC_FLAG_EMU_EDGE flag. - * - * @return Required padding in pixels. - */ -unsigned avcodec_get_edge_width(void); - -/** - * Modify width and height values so that they will result in a memory - * buffer that is acceptable for the codec if you do not use any horizontal - * padding. - * - * May only be used if a codec with CODEC_CAP_DR1 has been opened. - * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased - * according to avcodec_get_edge_width() before. - */ -void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height); - -/** - * Modify width and height values so that they will result in a memory - * buffer that is acceptable for the codec if you also ensure that all - * line sizes are a multiple of the respective linesize_align[i]. - * - * May only be used if a codec with CODEC_CAP_DR1 has been opened. - * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased - * according to avcodec_get_edge_width() before. - */ -void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, - int linesize_align[AV_NUM_DATA_POINTERS]); - -#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. - * - * @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. - */ -attribute_deprecated int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples, - int *frame_size_ptr, - AVPacket *avpkt); -#endif - -/** - * 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. - * - * @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. - */ -int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, - int *got_frame_ptr, AVPacket *avpkt); - -/** - * Decode the video frame of size avpkt->size from avpkt->data into picture. - * Some decoders may support multiple frames in a single AVPacket, such - * decoders would then just decode the first frame. - * - * @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than - * the actual read bytes because some optimized bitstream readers read 32 or 64 - * bits at once and could read over the end. - * - * @warning The end of the input buffer buf should be set to 0 to ensure that - * no overreading happens for damaged MPEG streams. - * - * @note 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_decode_video2(AVCodecContext *avctx, AVFrame *picture, - int *got_picture_ptr, - AVPacket *avpkt); - -/** - * Decode a subtitle message. - * Return a negative value on error, otherwise return the number of bytes used. - * If no subtitle could be decompressed, got_sub_ptr is zero. - * Otherwise, the subtitle is stored in *sub. - * Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for - * simplicity, because the performance difference is expect to be negligible - * and reusing a get_buffer written for video codecs would probably perform badly - * due to a potentially very different allocation pattern. - * - * @param avctx the codec context - * @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be - freed with avsubtitle_free if *got_sub_ptr is set. - * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero. - * @param[in] avpkt The input AVPacket containing the input buffer. - */ -int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, - int *got_sub_ptr, - AVPacket *avpkt); - -/** - * @defgroup lavc_parsing Frame parsing - * @{ - */ - -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); - -/** - * @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed - * @deprecated use AVBitstreamFilter - */ -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); - -/** - * @} - * @} - */ - -/** - * @addtogroup lavc_encoding - * @{ - */ - -/** - * Find a registered encoder with a matching codec ID. - * - * @param id AVCodecID of the requested encoder - * @return An encoder if one was found, NULL otherwise. - */ -AVCodec *avcodec_find_encoder(enum AVCodecID id); - -/** - * Find a registered encoder with the specified name. - * - * @param name name of the requested encoder - * @return An encoder if one was found, NULL otherwise. - */ -AVCodec *avcodec_find_encoder_by_name(const char *name); - -#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. - */ -int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx, - uint8_t *buf, int buf_size, - const short *samples); -#endif - -/** - * 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. - * - * @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 - */ -int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, - const AVFrame *frame, int *got_packet_ptr); - -#if FF_API_OLD_ENCODE_VIDEO -/** - * @deprecated use avcodec_encode_video2() instead. - * - * 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. - */ -attribute_deprecated -int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size, - const AVFrame *pict); -#endif - -/** - * Encode a frame of video. - * - * 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_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); - - -/** - * @} - */ - -#if FF_API_AVCODEC_RESAMPLE -/** - * @defgroup lavc_resample Audio resampling - * @ingroup libavc - * @deprecated use libavresample instead - * - * @{ - */ -struct ReSampleContext; -struct AVResampleContext; - -typedef struct ReSampleContext ReSampleContext; - -/** - * Initialize audio resampling context. - * - * @param output_channels number of output channels - * @param input_channels number of input channels - * @param output_rate output sample rate - * @param input_rate input sample rate - * @param sample_fmt_out requested output sample format - * @param sample_fmt_in input sample format - * @param filter_length length of each FIR filter in the filterbank relative to the cutoff frequency - * @param log2_phase_count log2 of the number of entries in the polyphase filterbank - * @param linear if 1 then the used FIR filter will be linearly interpolated - between the 2 closest, if 0 the closest will be used - * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate - * @return allocated ReSampleContext, NULL if error occurred - */ -attribute_deprecated -ReSampleContext *av_audio_resample_init(int output_channels, int input_channels, - int output_rate, int input_rate, - enum AVSampleFormat sample_fmt_out, - enum AVSampleFormat sample_fmt_in, - int filter_length, int log2_phase_count, - int linear, double cutoff); - -attribute_deprecated -int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples); - -/** - * Free resample context. - * - * @param s a non-NULL pointer to a resample context previously - * created with av_audio_resample_init() - */ -attribute_deprecated -void audio_resample_close(ReSampleContext *s); - - -/** - * Initialize an audio resampler. - * Note, if either rate is not an integer then simply scale both rates up so they are. - * @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq - * @param log2_phase_count log2 of the number of entries in the polyphase filterbank - * @param linear If 1 then the used FIR filter will be linearly interpolated - between the 2 closest, if 0 the closest will be used - * @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate - */ -attribute_deprecated -struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff); - -/** - * Resample an array of samples using a previously configured context. - * @param src an array of unconsumed samples - * @param consumed the number of samples of src which have been consumed are returned here - * @param src_size the number of unconsumed samples available - * @param dst_size the amount of space in samples available in dst - * @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context. - * @return the number of samples written in dst or -1 if an error occurred - */ -attribute_deprecated -int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx); - - -/** - * Compensate samplerate/timestamp drift. The compensation is done by changing - * the resampler parameters, so no audible clicks or similar distortions occur - * @param compensation_distance distance in output samples over which the compensation should be performed - * @param sample_delta number of output samples which should be output less - * - * example: av_resample_compensate(c, 10, 500) - * here instead of 510 samples only 500 samples would be output - * - * note, due to rounding the actual compensation might be slightly different, - * especially if the compensation_distance is large and the in_rate used during init is small - */ -attribute_deprecated -void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance); -attribute_deprecated -void av_resample_close(struct AVResampleContext *c); - -/** - * @} - */ -#endif - -/** - * @addtogroup lavc_picture - * @{ - */ - -/** - * Allocate memory for a picture. Call avpicture_free() to free it. - * - * @see avpicture_fill() - * - * @param picture the picture to be filled in - * @param pix_fmt the format of the picture - * @param width the width of the picture - * @param height the height of the picture - * @return zero if successful, a negative value if not - */ -int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height); - -/** - * Free a picture previously allocated by avpicture_alloc(). - * The data buffer used by the AVPicture is freed, but the AVPicture structure - * itself is not. - * - * @param picture the AVPicture to be freed - */ -void avpicture_free(AVPicture *picture); - -/** - * Fill in the AVPicture fields. - * The fields of the given AVPicture are filled in by using the 'ptr' address - * which points to the image data buffer. Depending on the specified picture - * format, one or multiple image data pointers and line sizes will be set. - * If a planar format is specified, several pointers will be set pointing to - * the different picture planes and the line sizes of the different planes - * will be stored in the lines_sizes array. - * Call with ptr == NULL to get the required size for the ptr buffer. - * - * To allocate the buffer and fill in the AVPicture fields in one call, - * use avpicture_alloc(). - * - * @param picture AVPicture whose fields are to be filled in - * @param ptr Buffer which will contain or contains the actual image data - * @param pix_fmt The format in which the picture data is stored. - * @param width the width of the image in pixels - * @param height the height of the image in pixels - * @return size of the image data in bytes - */ -int avpicture_fill(AVPicture *picture, uint8_t *ptr, - enum AVPixelFormat pix_fmt, int width, int height); - -/** - * Copy pixel data from an AVPicture into a buffer. - * The data is stored compactly, without any gaps for alignment or padding - * which may be applied by avpicture_fill(). - * - * @see avpicture_get_size() - * - * @param[in] src AVPicture containing image data - * @param[in] pix_fmt The format in which the picture data is stored. - * @param[in] width the width of the image in pixels. - * @param[in] height the height of the image in pixels. - * @param[out] dest A buffer into which picture data will be copied. - * @param[in] dest_size The size of 'dest'. - * @return The number of bytes written to dest, or a negative value (error code) on error. - */ -int avpicture_layout(const AVPicture* src, enum 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 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 AVPixelFormat pix_fmt, int width, int height); - -/** - * deinterlace - if not supported return -1 - */ -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); - -/** - * Crop image top and left side. - */ -int av_picture_crop(AVPicture *dst, const AVPicture *src, - enum AVPixelFormat pix_fmt, int top_band, int left_band); - -/** - * Pad image. - */ -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); - -/** - * @} - */ - -/** - * @defgroup lavc_misc Utility functions - * @ingroup libavc - * - * Miscellaneous utility functions related to both encoding and decoding - * (or neither). - * @{ - */ - -/** - * @defgroup lavc_misc_pixfmt Pixel formats - * - * Functions for working with pixel formats. - * @{ - */ - -/** - * @deprecated Use av_pix_fmt_get_chroma_sub_sample - */ - -void attribute_deprecated avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift); - -/** - * 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[in] dst_pix_fmt destination pixel format - * @param[in] src_pix_fmt source pixel format - * @param[in] has_alpha Whether the source pixel format alpha channel is used. - * @return Combination of flags informing you what kind of losses will occur. - */ -int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt, - int has_alpha); - -#if FF_API_FIND_BEST_PIX_FMT -/** - * @deprecated use avcodec_find_best_pix_fmt2() instead. - * - * 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 = 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 -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 */ - -/** - * 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. - * - * - * @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. - * - * @param buf_size size in bytes of buf - * @return the length of the string that would have been generated if - * enough space had been available, excluding the trailing null - */ -size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag); - -void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode); - -/** - * Return a name for the specified profile, if available. - * - * @param codec the codec that is searched for the given profile - * @param profile the profile value for which a name is requested - * @return A name for the profile if found, NULL otherwise. - */ -const char *av_get_profile_name(const AVCodec *codec, int profile); - -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 - -/** - * Fill audio frame data and linesize. - * AVFrame extended_data channel pointers are allocated if necessary for - * planar audio. - * - * @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 - */ -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_flush_buffers(AVCodecContext *avctx); - -void avcodec_default_free_buffers(AVCodecContext *s); - -/** - * 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 AVCodecID codec_id); - -/** - * Return codec bits per sample. - * Only return non-zero if the bits per sample is exactly correct, not an - * approximation. - * - * @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 AVCodecID codec_id); - -/** - * Return audio frame duration. - * - * @param avctx codec context - * @param frame_bytes size of the frame, or 0 if unknown - * @return frame duration, in samples, if known. 0 if not able to - * determine. - */ -int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes); - - -typedef struct AVBitStreamFilterContext { - void *priv_data; - struct AVBitStreamFilter *filter; - AVCodecParserContext *parser; - struct AVBitStreamFilterContext *next; -} AVBitStreamFilterContext; - - -typedef struct AVBitStreamFilter { - const char *name; - int priv_data_size; - int (*filter)(AVBitStreamFilterContext *bsfc, - AVCodecContext *avctx, const char *args, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size, int keyframe); - void (*close)(AVBitStreamFilterContext *bsfc); - struct AVBitStreamFilter *next; -} AVBitStreamFilter; - -void av_register_bitstream_filter(AVBitStreamFilter *bsf); -AVBitStreamFilterContext *av_bitstream_filter_init(const char *name); -int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, - AVCodecContext *avctx, const char *args, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size, int keyframe); -void av_bitstream_filter_close(AVBitStreamFilterContext *bsf); - -AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f); - -/* memory */ - -/** - * Reallocate the given block if it is not large enough, otherwise do nothing. - * - * @see av_realloc - */ -void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size); - -/** - * Allocate a buffer, reusing the given one if large enough. - * - * Contrary to av_fast_realloc the current buffer contents might not be - * preserved and on error the old buffer is freed, thus no special - * handling to avoid memleaks is necessary. - * - * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer - * @param size size of the buffer *ptr points to - * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and - * *size 0 if an error occurred. - */ -void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size); - -/** - * Allocate a buffer with padding, reusing the given one if large enough. - * - * Same behaviour av_fast_malloc but the buffer has additional - * FF_INPUT_PADDING_SIZE at the end which will always memset to 0. - * - */ -void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size); - -/** - * Encode extradata length to a buffer. Used by xiph codecs. - * - * @param s buffer to write to; must be at least (v/255+1) bytes long - * @param v size of extradata in bytes - * @return number of bytes written to the buffer. - */ -unsigned int av_xiphlacing(unsigned char *s, unsigned int v); - -/** - * Log a generic warning message about a missing feature. This function is - * intended to be used internally by Libav (libavcodec, libavformat, etc.) - * only, and would normally not be used by applications. - * @param[in] avc a pointer to an arbitrary struct of which the first field is - * a pointer to an AVClass struct - * @param[in] feature string containing the name of the missing feature - * @param[in] want_sample indicates if samples are wanted which exhibit this feature. - * If want_sample is non-zero, additional verbage will be added to the log - * message which tells the user how to report samples to the development - * mailing list. - */ -void av_log_missing_feature(void *avc, const char *feature, int want_sample); - -/** - * Log a generic warning message asking for a sample. This function is - * intended to be used internally by Libav (libavcodec, libavformat, etc.) - * only, and would normally not be used by applications. - * @param[in] avc a pointer to an arbitrary struct of which the first field is - * a pointer to an AVClass struct - * @param[in] msg string containing an optional message, or NULL if no message - */ -void av_log_ask_for_sample(void *avc, const char *msg, ...) av_printf_format(2, 3); - -/** - * Register the hardware accelerator hwaccel. - */ -void av_register_hwaccel(AVHWAccel *hwaccel); - -/** - * If hwaccel is NULL, returns the first registered hardware accelerator, - * if hwaccel is non-NULL, returns the next registered hardware accelerator - * after hwaccel, or NULL if hwaccel is the last one. - */ -AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel); - - -/** - * Lock operation used by lockmgr - */ -enum AVLockOp { - AV_LOCK_CREATE, ///< Create a mutex - AV_LOCK_OBTAIN, ///< Lock the mutex - AV_LOCK_RELEASE, ///< Unlock the mutex - AV_LOCK_DESTROY, ///< Free mutex resources -}; - -/** - * Register a user provided lock manager supporting the operations - * specified by AVLockOp. mutex points to a (void *) where the - * lockmgr should store/get a pointer to a user allocated mutex. It's - * NULL upon AV_LOCK_CREATE and != NULL for all other ops. - * - * @param cb User defined callback. Note: Libav may invoke calls to this - * callback during the call to av_lockmgr_register(). - * Thus, the application must be prepared to handle that. - * If cb is set to NULL the lockmgr will be unregistered. - * Also note that during unregistration the previously registered - * lockmgr callback may also be invoked. - */ -int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op)); - -/** - * Get the type of the given codec. - */ -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 - * with no corresponding avcodec_close()), 0 otherwise. - */ -int avcodec_is_open(AVCodecContext *s); - -/** - * @return a non-zero number if codec is an encoder, zero otherwise - */ -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(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 */ |