diff options
Diffstat (limited to '')
| -rw-r--r-- | src/lib/ffmpeg-1.0/avcodec.pas | 5274 |
1 files changed, 5274 insertions, 0 deletions
diff --git a/src/lib/ffmpeg-1.0/avcodec.pas b/src/lib/ffmpeg-1.0/avcodec.pas new file mode 100644 index 00000000..ad9fc5e7 --- /dev/null +++ b/src/lib/ffmpeg-1.0/avcodec.pas @@ -0,0 +1,5274 @@ +(* + * copyright (c) 2001 Fabrice Bellard + * + * This library 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 of the License, or (at your option) any later version. + * + * This library 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 this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + * This is a part of Pascal porting of ffmpeg. + * - Originally by Victor Zinetz for Delphi and Free Pascal on Windows. + * - For Mac OS X, some modifications were made by The Creative CAT, denoted as CAT + * in the source codes. + * - Changes and updates by the UltraStar Deluxe Team + * + * Conversion of libavcodec/avcodec.h + * version: 54.59.100 + * + *) + +unit avcodec; + +{$IFDEF FPC} + {$MODE DELPHI } + {$PACKENUM 4} (* use 4-byte enums *) + {$PACKRECORDS C} (* C/C++-compatible record packing *) +{$ELSE} + {$MINENUMSIZE 4} (* use 4-byte enums *) +{$ENDIF} + +{$IFDEF DARWIN} + {$linklib libavcodec} +{$ENDIF} + +interface + +uses + ctypes, + avutil, + rational, + SysUtils, + {$IFDEF UNIX} + BaseUnix, + {$ENDIF} + UConfig; + +const + (* + * IMPORTANT: The official FFmpeg C headers change very quickly. Often some + * of the data structures are changed so that they become incompatible with + * older header files. The Pascal headers have to be adjusted to those changes, + * otherwise the application might crash randomly or strange bugs (not + * necessarily related to video or audio due to buffer overflows etc.) might + * occur. + * + * In the past users reported problems with USDX that took hours to fix and + * the problem was an unsupported version of FFmpeg. So we decided to disable + * support for future versions of FFmpeg until the headers are revised by us + * for that version as they otherwise most probably will break USDX. + * + * If the headers do not yet support your FFmpeg version you may want to + * adjust the max. version numbers manually but please note: it may work but + * in many cases it does not. The USDX team does NOT PROVIDE ANY SUPPORT + * for the game if the MAX. VERSION WAS CHANGED. + * + * The only safe way to support new versions of FFmpeg is to add the changes + * of the FFmpeg git repository C headers to the Pascal headers. + * You can accelerate this process by posting a patch with the git changes + * translated to Pascal to our bug tracker (please join our IRC chat before + * you start working on it). Simply adjusting the max. versions is NOT a valid + * fix. + *) + + (* Supported version by this header *) + LIBAVCODEC_MAX_VERSION_MAJOR = 54; + LIBAVCODEC_MAX_VERSION_MINOR = 59; + LIBAVCODEC_MAX_VERSION_RELEASE = 100; + LIBAVCODEC_MAX_VERSION = (LIBAVCODEC_MAX_VERSION_MAJOR * VERSION_MAJOR) + + (LIBAVCODEC_MAX_VERSION_MINOR * VERSION_MINOR) + + (LIBAVCODEC_MAX_VERSION_RELEASE * VERSION_RELEASE); + + (* Min. supported version by this header *) + LIBAVCODEC_MIN_VERSION_MAJOR = 54; + LIBAVCODEC_MIN_VERSION_MINOR = 59; + LIBAVCODEC_MIN_VERSION_RELEASE = 0; + LIBAVCODEC_MIN_VERSION = (LIBAVCODEC_MIN_VERSION_MAJOR * VERSION_MAJOR) + + (LIBAVCODEC_MIN_VERSION_MINOR * VERSION_MINOR) + + (LIBAVCODEC_MIN_VERSION_RELEASE * VERSION_RELEASE); + +(* Check if linked versions are supported *) +{$IF (LIBAVCODEC_VERSION < LIBAVCODEC_MIN_VERSION)} + {$MESSAGE Error 'Linked version of libavcodec is too old!'} +{$IFEND} + +(* Check if linked version is supported *) +{$IF (LIBAVCODEC_VERSION > LIBAVCODEC_MAX_VERSION)} + {$MESSAGE Error 'Linked version of libavcodec is not yet supported!'} +{$IFEND} + +(** + * FF_API_* defines may be placed below to indicate public API that will be + * dropped at a future version bump. The defines themselves are not part of + * the public API and may change, break or disappear at any time. + *) +const +{$ifndef FF_API_REQUEST_CHANNELS} + FF_API_REQUEST_CHANNELS = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_ALLOC_CONTEXT} + FF_API_ALLOC_CONTEXT = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_AVCODEC_OPEN} + FF_API_AVCODEC_OPEN = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_OLD_DECODE_AUDIO} + FF_API_OLD_DECODE_AUDIO = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_OLD_TIMECODE} + FF_API_OLD_TIMECODE = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} + +{$ifndef FF_API_OLD_ENCODE_AUDIO} + FF_API_OLD_ENCODE_AUDIO = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_OLD_ENCODE_VIDEO} + FF_API_OLD_ENCODE_VIDEO = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_MPV_GLOBAL_OPTS} + FF_API_MPV_GLOBAL_OPTS = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_COLOR_TABLE_ID} + FF_API_COLOR_TABLE_ID = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_INTER_THRESHOLD} + FF_API_INTER_THRESHOLD = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_SUB_ID} + FF_API_SUB_ID = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_DSP_MASK} + FF_API_DSP_MASK = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_FIND_BEST_PIX_FMT} + FF_API_FIND_BEST_PIX_FMT = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_CODEC_ID} + FF_API_CODEC_ID = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} +{$ifndef FF_API_VDA_ASYNC} + FF_API_VDA_ASYNC = (LIBAVCODEC_VERSION_MAJOR < 55); +{$endif} + +{$IFNDEF FPC} +type + // defines for Delphi + size_t = cardinal; +{$ENDIF} + +type + FF_INTERNALC_MEM_TYPE = cuint; + +const + AV_NOPTS_VALUE: cint64 = $8000000000000000; + AV_TIME_BASE = 1000000; + AV_TIME_BASE_Q: TAVRational = (num: 1; den: AV_TIME_BASE); + +(** + * @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. Give it a value which when taken as ASCII is recognized uniquely by a human as this specific codec. + * This ensures that 2 forks can independently add AVCodecIDs without producing conflicts. + * + * After adding new codec IDs, do not forget to add an entry to the codec + * descriptor list and bump libavcodec minor version. + *) +type + TAVCodecID = ( + 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, +(** see below. they need to be hard coded. + AV_CODEC_ID_Y41P = MKBETAG('Y','4','1','P'), + AV_CODEC_ID_ESCAPE130 = MKBETAG('E','1','3','0'), + AV_CODEC_ID_EXR = MKBETAG('0','E','X','R'), + AV_CODEC_ID_AVRP = MKBETAG('A','V','R','P'), + + AV_CODEC_ID_G2M = MKBETAG( 0 ,'G','2','M'), + AV_CODEC_ID_AVUI = MKBETAG('A','V','U','I'), + AV_CODEC_ID_AYUV = MKBETAG('A','Y','U','V'), + AV_CODEC_ID_V308 = MKBETAG('V','3','0','8'), + AV_CODEC_ID_V408 = MKBETAG('V','4','0','8'), + AV_CODEC_ID_YUV4 = MKBETAG('Y','U','V','4'), + AV_CODEC_ID_SANM = MKBETAG('S','A','N','M'), + AV_CODEC_ID_PAF_VIDEO = MKBETAG('P','A','F','V'), + AV_CODEC_ID_AVRN = MKBETAG('A','V','R','n'), + AV_CODEC_ID_CPIA = MKBETAG('C','P','I','A'), + *) + //* various PCM "codecs" */ +// AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs + AV_CODEC_ID_PCM_S16LE = $10000, + 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 = $11000, + 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, +(** see below. they need to be hard coded. + AV_CODEC_ID_VIMA = MKBETAG('V','I','M','A'), + *) + + //* AMR */ + AV_CODEC_ID_AMR_NB = $12000, + AV_CODEC_ID_AMR_WB, + + //* RealAudio codecs*/ + AV_CODEC_ID_RA_144 = $13000, + AV_CODEC_ID_RA_288, + + //* various DPCM codecs */ + AV_CODEC_ID_ROQ_DPCM = $14000, + AV_CODEC_ID_INTERPLAY_DPCM, + AV_CODEC_ID_XAN_DPCM, + AV_CODEC_ID_SOL_DPCM, + + //* audio codecs */ + AV_CODEC_ID_MP2 = $15000, + 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, +(** see below. they need to be hard coded. + AV_CODEC_ID_FFWAVESYNTH = MKBETAG('F','F','W','S'), + AV_CODEC_ID_8SVX_RAW = MKBETAG('8','S','V','X'), + AV_CODEC_ID_SONIC = MKBETAG('S','O','N','C'), + AV_CODEC_ID_SONIC_LS = MKBETAG('S','O','N','L'), + AV_CODEC_ID_PAF_AUDIO = MKBETAG('P','A','F','A'), + AV_CODEC_ID_OPUS = MKBETAG('O','P','U','S'), + *) + + //* subtitle codecs */ +// AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs. + AV_CODEC_ID_DVD_SUBTITLE = $17000, + 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, +(** see below. they need to be hard coded. + AV_CODEC_ID_MICRODVD = MKBETAG('m','D','V','D'), + AV_CODEC_ID_EIA_608 = MKBETAG('c','6','0','8'), + AV_CODEC_ID_JACOSUB = MKBETAG('J','S','U','B'), + AV_CODEC_ID_SAMI = MKBETAG('S','A','M','I'), + AV_CODEC_ID_REALTEXT = MKBETAG('R','T','X','T'), + AV_CODEC_ID_SUBVIEWER = MKBETAG('S','u','b','V'), + AV_CODEC_ID_SUBRIP = MKBETAG('S','R','i','p'), + AV_CODEC_ID_WEBVTT = MKBETAG('W','V','T','T'), + *) + + //* 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 = $18000, +(** see below. they need to be hard coded. + AV_CODEC_ID_BINTEXT = MKBETAG('B','T','X','T'), + AV_CODEC_ID_XBIN = MKBETAG('X','B','I','N'), + AV_CODEC_ID_IDF = MKBETAG( 0 ,'I','D','F'), + AV_CODEC_ID_OTF = MKBETAG( 0 ,'O','T','F'), + *) + + AV_CODEC_ID_PROBE = $19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it + + AV_CODEC_ID_MPEG2TS = $20000, (**< _FAKE_ codec to indicate a raw MPEG-2 TS + * stream (only used by libavformat) *) + AV_CODEC_ID_MPEG4SYSTEMS = $20001, (**< _FAKE_ codec to indicate a MPEG-4 Systems + * stream (only used by libavformat) *) + AV_CODEC_ID_FFMETADATA = $21000, ///< Dummy codec for streams containing only metadata information. + +(** hardcoded codecs from above. pascal needs them to be ordered **) + AV_CODEC_ID_G2M = $0047324D, // MKBETAG( 0 ,'G','2','M') + AV_CODEC_ID_IDF = $00494446, // MKBETAG( 0 ,'I','D','F') + AV_CODEC_ID_OTF = $004F5446 // MKBETAG( 0 ,'O','T','F'), + AV_CODEC_ID_EXR = $30455852, // MKBETAG('0','E','X','R') + AV_CODEC_ID_8SVX_RAW = $38535658, // MKBETAG('8','S','V','X') + AV_CODEC_ID_AVRP = $41565250, // MKBETAG('A','V','R','P') + AV_CODEC_ID_AVRN = $4156526E // MKBETAG('A','V','R','n'), + AV_CODEC_ID_AVUI = $41565549, // MKBETAG('A','V','U','I') + AV_CODEC_ID_AYUV = $41595556, // MKBETAG('A','Y','U','V'), + AV_CODEC_ID_BINTEXT = $42545854, // MKBETAG('B','T','X','T') + AV_CODEC_ID_CPIA = $43504941 // MKBETAG('C','P','I','A'), + AV_CODEC_ID_ESCAPE130 = $45313330, // MKBETAG('E','1','3','0') + AV_CODEC_ID_FFWAVESYNTH = $46465753, // MKBETAG('F','F','W','S') + AV_CODEC_ID_JACOSUB = $4A535542, // MKBETAG('J','S','U','B'), + AV_CODEC_ID_OPUS = $4F505553 // MKBETAG('O','P','U','S'), + AV_CODEC_ID_PAF_AUDIO = $50414641 // MKBETAG('P','A','F','A'), + AV_CODEC_ID_PAF_VIDEO = $50414656 // MKBETAG('P','A','F','V'), + AV_CODEC_ID_REALTEXT = $52545854 // MKBETAG('R','T','X','T'), + AV_CODEC_ID_SAMI = $53414D49 // MKBETAG('S','A','M','I'), + AV_CODEC_ID_SANM = $53414E4D // MKBETAG('S','A','N','M'), + AV_CODEC_ID_SONIC = $534F4E43, // MKBETAG('S','O','N','C'), + AV_CODEC_ID_SONIC_LS = $534F4E4C, // MKBETAG('S','O','N','L'), + AV_CODEC_ID_SUBRIP = $53526970 // MKBETAG('S','R','i','p'), + AV_CODEC_ID_SUBVIEWER = $53756256 // MKBETAG('S','u','b','V'), + AV_CODEC_ID_V308 = $56333038, // MKBETAG('V','3','0','8') + AV_CODEC_ID_V408 = $56413038, // MKBETAG('V','4','0','8'), + AV_CODEC_ID_WEBVTT = $57565454 // MKBETAG('W','V','T','T'), + AV_CODEC_ID_XBIN = $5842494E, // MKBETAG('X','B','I','N') + AV_CODEC_ID_Y41P = $59343150, // MKBETAG('Y','4','1','P') + AV_CODEC_ID_YUV4 = $59555634, // MKBETAG('Y','U','V','4') + AV_CODEC_ID_EIA_608 = $63363038, // MKBETAG('c','6','0','8'), + AV_CODEC_ID_MICRODVD = $6D445644 // MKBETAG('m','D','V','D') + + ); + +type + TCodecType = TAVMediaType; + +const + CODEC_TYPE_UNKNOWN = AVMEDIA_TYPE_UNKNOWN; + CODEC_TYPE_VIDEO = AVMEDIA_TYPE_VIDEO; + CODEC_TYPE_AUDIO = AVMEDIA_TYPE_AUDIO; + CODEC_TYPE_DATA = AVMEDIA_TYPE_DATA; + CODEC_TYPE_SUBTITLE = AVMEDIA_TYPE_SUBTITLE; + CODEC_TYPE_ATTACHMENT = AVMEDIA_TYPE_ATTACHMENT; + CODEC_TYPE_NB = AVMEDIA_TYPE_NB; + +(** + * This struct describes the properties of a single codec described by an + * AVCodecID. + * @see avcodec_get_descriptor() + *) +type + record AVCodecDescriptor = + id: TAVCodecID; + type_: TAVMediaType; + (** + * Name of the codec described by this descriptor. It is non-empty and + * unique for each codec descriptor. It should contain alphanumeric + * characters and '_' only. + *) + name: PAnsiChar; + (** + * A more descriptive name for this codec. May be NULL. + *) + long_name: PAnsiChar; + (** + * Codec properties, a combination of AV_CODEC_PROP_* flags. + *) + props: cint; + end; + +const +(** + * Codec uses only intra compression. + * Video codecs only. + *) + AV_CODEC_PROP_INTRA_ONLY = 1 << 0; +(** + * Codec supports lossy compression. Audio and video codecs only. + * @note a codec may support both lossy and lossless + * compression modes + *) + AV_CODEC_PROP_LOSSY = 1 << 1; +(** + * Codec supports lossless compression. Audio and video codecs only. + *) + AV_CODEC_PROP_LOSSLESS = 1 << 2; + +{$IF FF_API_OLD_DECODE_AUDIO} +(* in bytes *) + AVCODEC_MAX_AUDIO_FRAME_SIZE = 192000; // 1 second of 48khz 32bit audio +{$IFEND} + +(** + * @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. + *) + FF_INPUT_BUFFER_PADDING_SIZE = 16; + +(** + * @ingroup lavc_decoding + * minimum encoding buffer size. + * Used to avoid some checks during header writing. + *) + FF_MIN_BUFFER_SIZE = 16384; + +type +(* + * @ingroup lavc_decoding + * motion estimation type. + *) + TMotion_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 + *) + TAVDiscard = ( + (* 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 + ); + + TAVColorPrimaries = ( + 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 + ); + + TAVColorTransferCharacteristic = ( + 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_SPC_SMPTE240M = 7, + AVCOL_TRC_NB ///< Not part of ABI + ); + + TAVColorSpace = ( + 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_YCGCO = 8, + AVCOL_SPC_NB ///< Not part of ABI + ); + + TAVColorRange = ( + 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 + *) + TAVChromaLocation = ( + 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 + ); + + TAVAudioServiceType =( + 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_decoding + *) + PRcOverride = ^TRcOverride; + TRcOverride = record {16} + start_frame: cint; + end_frame: cint; + qscale: cint; // if this is 0 then quality_factor will be used instead + quality_factor: cfloat; + end; + +const + FF_MAX_B_FRAMES = 16; + +(* encoding support + These flags can be passed in AVCodecContext.flags before initialization. + Note: Not everything is supported yet. +*) + + CODEC_FLAG_QSCALE = $0002; ///< Use fixed qscale. + CODEC_FLAG_4MV = $0004; ///< 4 MV per MB allowed / advanced prediction for H263. + CODEC_FLAG_QPEL = $0010; ///< use qpel MC. + CODEC_FLAG_GMC = $0020; ///< use GMC. + CODEC_FLAG_MV0 = $0040; ///< 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. + *) + CODEC_FLAG_INPUT_PRESERVED = $0100; + CODEC_FLAG_PASS1 = $0200; ///< use internal 2pass ratecontrol in first pass mode + CODEC_FLAG_PASS2 = $0400; ///< use internal 2pass ratecontrol in second pass mode + CODEC_FLAG_GRAY = $2000; ///< only decode/encode grayscale + CODEC_FLAG_EMU_EDGE = $4000; ///< don't draw edges + CODEC_FLAG_PSNR = $8000; ///< error[?] variables will be set during encoding + CODEC_FLAG_TRUNCATED = $00010000; //** input bitstream might be truncated at a random + // location instead of only at frame boundaries */ + CODEC_FLAG_NORMALIZE_AQP = $00020000; ///< normalize adaptive quantization + CODEC_FLAG_INTERLACED_DCT = $00040000; ///< use interlaced dct + CODEC_FLAG_LOW_DELAY = $00080000; ///< force low delay + CODEC_FLAG_ALT_SCAN = $00100000; ///< use alternate scan + CODEC_FLAG_GLOBAL_HEADER = $00400000; ///< place global headers in extradata instead of every keyframe + CODEC_FLAG_BITEXACT = $00800000; ///< use only bitexact stuff (except (i)dct) + (* Fx : Flag for h263+ extra options *) + CODEC_FLAG_AC_PRED = $01000000; ///< H263 Advanced intra coding / MPEG4 AC prediction + CODEC_FLAG_LOOP_FILTER = $00000800; ///< loop filter + CODEC_FLAG_INTERLACED_ME = $20000000; ///< interlaced motion estimation + CODEC_FLAG_CLOSED_GOP = $80000000; + CODEC_FLAG2_FAST = $00000001; ///< allow non spec compliant speedup tricks + CODEC_FLAG2_NO_OUTPUT = $00000004; ///< skip bitstream encoding + CODEC_FLAG2_LOCAL_HEADER = $00000008; ///< place global headers at every keyframe instead of in extradata + CODEC_FLAG2_DROP_FRAME_TIMECODE = $00002000; ///< timecode is in drop frame format. DEPRECATED!!!! +{$IFDEF FF_API_MPV_GLOBAL_OPTS} + CODEC_FLAG_CBP_RD = $04000000; ///< use rate distortion optimization for cbp + CODEC_FLAG_QP_RD = $08000000; ///< use rate distortion optimization for qp selectioon + CODEC_FLAG2_STRICT_GOP = $00000002; ///< strictly enforce GOP size + CODEC_FLAG2_SKIP_RD = $00004000; ///< RD optimal MB level residual skipping +{$ENDIF} + CODEC_FLAG2_CHUNKS = $00008000; ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries. + CODEC_FLAG2_SHOW_ALL = $00400000; ///< Show all frames before the first keyframe + +(* Unsupported options : + * Syntax Arithmetic coding (SAC) + * Reference Picture Selection + * Independant Segment Decoding *) +(* /Fx *) +(* codec capabilities *) + + CODEC_CAP_DRAW_HORIZ_BAND = $0001; ///< 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. + *) + CODEC_CAP_DR1 = $0002; + CODEC_CAP_TRUNCATED = $0008; + +(* codec can export data for HW decoding (XvMC) *) + CODEC_CAP_HWACCEL = $0010; + +(** + * 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. + *) + CODEC_CAP_DELAY = $0020; + +(** + * Codec can be fed a final frame with a smaller size. + * This can be used to prevent truncation of the last audio samples. + *) + CODEC_CAP_SMALL_LAST_FRAME = $0040; + +(** + * Codec can export data for HW decoding (VDPAU). + *) + CODEC_CAP_HWACCEL_VDPAU = $0080; + +(** + * 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. + *) + CODEC_CAP_SUBFRAMES = $0100; + +(** + * Codec is experimental and is thus avoided in favor of non experimental + * encoders + *) + CODEC_CAP_EXPERIMENTAL = $0200; + +(** + * Codec should fill in channel configuration and samplerate instead of container + *) + CODEC_CAP_CHANNEL_CONF = $0400; + +(** + * Codec is able to deal with negative linesizes + *) + CODEC_CAP_NEG_LINESIZES = $0800; + +(** + * Codec supports frame-level multithreading. + *) + CODEC_CAP_FRAME_THREADS = $1000; + +(** + * Codec supports slice-based (or partition-based) multithreading. + *) + CODEC_CAP_SLICE_THREADS = $2000; + +(** + * Codec supports changed parameters at any point. + *) + CODEC_CAP_PARAM_CHANGE = $4000; + +(** + * Codec supports avctx->thread_count == 0 (auto). + *) + CODEC_CAP_AUTO_THREADS = $8000; + +(** + * Audio encoder supports receiving a different number of samples in each call. + *) + CODEC_CAP_VARIABLE_FRAME_SIZE = $10000; + +(** + * Codec is lossless. + *) + CODEC_CAP_LOSSLESS = $80000000; + + //the following defines may change, don't expect compatibility if you use them + MB_TYPE_INTRA4x4 = $001; + MB_TYPE_INTRA16x16 = $002; //FIXME h264 specific + MB_TYPE_INTRA_PCM = $004; //FIXME h264 specific + MB_TYPE_16x16 = $008; + MB_TYPE_16x8 = $010; + MB_TYPE_8x16 = $020; + MB_TYPE_8x8 = $040; + MB_TYPE_INTERLACED = $080; + MB_TYPE_DIRECT2 = $100; //FIXME + MB_TYPE_ACPRED = $200; + MB_TYPE_GMC = $400; + MB_TYPE_SKIP = $800; + MB_TYPE_P0L0 = $1000; + MB_TYPE_P1L0 = $2000; + MB_TYPE_P0L1 = $4000; + MB_TYPE_P1L1 = $8000; + MB_TYPE_L0 = (MB_TYPE_P0L0 or MB_TYPE_P1L0); + MB_TYPE_L1 = (MB_TYPE_P0L1 or MB_TYPE_P1L1); + MB_TYPE_L0L1 = (MB_TYPE_L0 or MB_TYPE_L1); + MB_TYPE_QUANT = $0010000; + MB_TYPE_CBP = $0020000; + //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...) + +type +(** + * Pan Scan area. + * This specifies the area which should be displayed. + * Note there may be multiple such areas for one frame. + *) + PAVPanScan = ^TAVPanScan; + TAVPanScan = record {24} + (*** id. + * - encoding: set by user. + * - decoding: set by libavcodec. *) + id: cint; + + (*** width and height in 1/16 pel + * - encoding: set by user. + * - decoding: set by libavcodec. *) + width: cint; + height: cint; + + (*** position of the top left corner in 1/16 pel for up to 3 fields/frames. + * - encoding: set by user. + * - decoding: set by libavcodec. *) + position: array [0..2] of array [0..1] of cint16; + end; {TAVPanScan} + +const + FF_QSCALE_TYPE_MPEG1 = 0; + FF_QSCALE_TYPE_MPEG2 = 1; + FF_QSCALE_TYPE_H264 = 2; + FF_QSCALE_TYPE_VP56 = 3; + + FF_BUFFER_TYPE_INTERNAL = 1; + FF_BUFFER_TYPE_USER = 2; ///< Direct rendering buffers (image is (de)allocated by user) + FF_BUFFER_TYPE_SHARED = 4; ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared + FF_BUFFER_TYPE_COPY = 8; ///< just a (modified) copy of some other buffer, don't dealloc anything. + + FF_BUFFER_HINTS_VALID = $01; // Buffer hints value is meaningful (if 0 ignore) + FF_BUFFER_HINTS_READABLE = $02; // Codec will read from buffer + FF_BUFFER_HINTS_PRESERVE = $04; // User must not alter buffer content + FF_BUFFER_HINTS_REUSABLE = $08; // Codec will reuse the buffer (update) + + FF_COMPRESSION_DEFAULT = -1; + + FF_ASPECT_EXTENDED = 15; + + FF_RC_STRATEGY_XVID = 1; + + FF_PRED_LEFT = 0; + FF_PRED_PLANE = 1; + FF_PRED_MEDIAN = 2; + + FF_CMP_SAD = 0; + FF_CMP_SSE = 1; + FF_CMP_SATD = 2; + FF_CMP_DCT = 3; + FF_CMP_PSNR = 4; + FF_CMP_BIT = 5; + FF_CMP_RD = 6; + FF_CMP_ZERO = 7; + FF_CMP_VSAD = 8; + FF_CMP_VSSE = 9; + FF_CMP_NSSE = 10; + FF_CMP_W53 = 11; + FF_CMP_W97 = 12; + FF_CMP_DCTMAX = 13; + FF_CMP_DCT264 = 14; + FF_CMP_CHROMA = 256; + + FF_DTG_AFD_SAME = 8; + FF_DTG_AFD_4_3 = 9; + FF_DTG_AFD_16_9 = 10; + FF_DTG_AFD_14_9 = 11; + FF_DTG_AFD_4_3_SP_14_9 = 13; + FF_DTG_AFD_16_9_SP_14_9 = 14; + FF_DTG_AFD_SP_4_3 = 15; + + FF_DEFAULT_QUANT_BIAS = 999999; + + SLICE_FLAG_CODED_ORDER = $0001; ///< draw_horiz_band() is called in coded order instead of display + SLICE_FLAG_ALLOW_FIELD = $0002; ///< allow draw_horiz_band() with field slices (MPEG2 field pics) + SLICE_FLAG_ALLOW_PLANE = $0004; ///< allow draw_horiz_band() with 1 component at a time (SVQ1) + + FF_MB_DECISION_SIMPLE = 0; ///< uses mb_cmp + FF_MB_DECISION_BITS = 1; ///< chooses the one which needs the fewest bits + FF_MB_DECISION_RD = 2; ///< rate distortion + + FF_CODER_TYPE_VLC = 0; + FF_CODER_TYPE_AC = 1; + FF_CODER_TYPE_RAW = 2; + FF_CODER_TYPE_RLE = 3; + FF_CODER_TYPE_DEFLATE = 4; + + FF_BUG_AUTODETECT = 1; ///< autodetection + FF_BUG_OLD_MSMPEG4 = 2; + FF_BUG_XVID_ILACE = 4; + FF_BUG_UMP4 = 8; + FF_BUG_NO_PADDING = 16; + FF_BUG_AMV = 32; + FF_BUG_AC_VLC = 0; ///< will be removed, libavcodec can now handle these non compliant files by default + FF_BUG_QPEL_CHROMA = 64; + FF_BUG_STD_QPEL = 128; + FF_BUG_QPEL_CHROMA2 = 256; + FF_BUG_DIRECT_BLOCKSIZE = 512; + FF_BUG_EDGE = 1024; + FF_BUG_HPEL_CHROMA = 2048; + FF_BUG_DC_CLIP = 4096; + FF_BUG_MS = 8192; ///< workaround various bugs in microsofts broken decoders + FF_BUG_TRUNCATED = 16384; + + FF_COMPLIANCE_VERY_STRICT = 2; ///< strictly conform to an older more strict version of the spec or reference software + FF_COMPLIANCE_STRICT = 1; ///< strictly conform to all the things in the spec no matter what consequences + FF_COMPLIANCE_NORMAL = 0; + FF_COMPLIANCE_UNOFFICIAL = -1; ///< Allow unofficial extensions + FF_COMPLIANCE_EXPERIMENTAL = -2; ///< Allow nonstandardized experimental things. + + FF_EC_GUESS_MVS = 1; + FF_EC_DEBLOCK = 2; + + FF_DEBUG_PICT_INFO = 1; + FF_DEBUG_RC = 2; + FF_DEBUG_BITSTREAM = 4; + FF_DEBUG_MB_TYPE = 8; + FF_DEBUG_QP = 16; + FF_DEBUG_MV = 32; + FF_DEBUG_DCT_COEFF = $00000040; + FF_DEBUG_SKIP = $00000080; + FF_DEBUG_STARTCODE = $00000100; + FF_DEBUG_PTS = $00000200; + FF_DEBUG_ER = $00000400; + FF_DEBUG_MMCO = $00000800; + FF_DEBUG_BUGS = $00001000; + FF_DEBUG_VIS_QP = $00002000; + FF_DEBUG_VIS_MB_TYPE = $00004000; + FF_DEBUG_BUFFERS = $00008000; + + FF_DEBUG_VIS_MV_P_FOR = $00000001; //visualize forward predicted MVs of P frames + FF_DEBUG_VIS_MV_B_FOR = $00000002; //visualize forward predicted MVs of B frames + FF_DEBUG_VIS_MV_B_BACK = $00000004; //visualize backward predicted MVs of B frames + + AV_EF_CRCCHECK = 1; + AV_EF_BITSTREAM = 2; + AV_EF_BUFFER = 4; + AV_EF_EXPLODE = 8; + + AV_EF_CAREFUL = 65536; + AV_EF_COMPLIANT = 131072; + AV_EF_AGGRESSIVE = 262144; + + FF_DCT_AUTO = 0; + FF_DCT_FASTINT = 1; + FF_DCT_INT = 2; + FF_DCT_MMX = 3; + FF_DCT_MLIB = 4; + FF_DCT_ALTIVEC = 5; + FF_DCT_FAAN = 6; + + FF_IDCT_AUTO = 0; + FF_IDCT_INT = 1; + FF_IDCT_SIMPLE = 2; + FF_IDCT_SIMPLEMMX = 3; + FF_IDCT_LIBMPEG2MMX = 4; + FF_IDCT_PS2 = 5; + FF_IDCT_MLIB = 6; + FF_IDCT_ARM = 7; + FF_IDCT_ALTIVEC = 8; + FF_IDCT_SH4 = 9; + FF_IDCT_SIMPLEARM = 10; + FF_IDCT_H264 = 11; + FF_IDCT_VP3 = 12; + FF_IDCT_IPP = 13; + FF_IDCT_XVIDMMX = 14; + FF_IDCT_CAVS = 15; + FF_IDCT_SIMPLEARMV5TE= 16; + FF_IDCT_SIMPLEARMV6 = 17; + FF_IDCT_SIMPLEVIS = 18; + FF_IDCT_WMV2 = 19; + FF_IDCT_FAAN = 20; + FF_IDCT_EA = 21; + FF_IDCT_SIMPLENEON = 22; + FF_IDCT_SIMPLEALPHA = 23; + FF_IDCT_BINK = 24; + + FF_THREAD_FRAME = 1; ///< Decode more than one frame at once + FF_THREAD_SLICE = 2; ///< Decode more than one part of a single frame at once + + FF_PROFILE_UNKNOWN = -99; + FF_PROFILE_RESERVED = -100; + + FF_PROFILE_AAC_MAIN = 0; + FF_PROFILE_AAC_LOW = 1; + FF_PROFILE_AAC_SSR = 2; + FF_PROFILE_AAC_LTP = 3; + FF_PROFILE_AAC_HE = 4; + FF_PROFILE_AAC_HE_V2 = 28; + FF_PROFILE_AAC_LD = 22; + FF_PROFILE_AAC_ELD = 38; + + FF_PROFILE_DTS = 20; + FF_PROFILE_DTS_ES = 30; + FF_PROFILE_DTS_96_24 = 40; + FF_PROFILE_DTS_HD_HRA = 50; + FF_PROFILE_DTS_HD_MA = 60; + + FF_PROFILE_MPEG2_422 = 0; + FF_PROFILE_MPEG2_HIGH = 1; + FF_PROFILE_MPEG2_SS = 2; + FF_PROFILE_MPEG2_SNR_SCALABLE = 3; + FF_PROFILE_MPEG2_MAIN = 4; + FF_PROFILE_MPEG2_SIMPLE= 5; + + FF_PROFILE_H264_CONSTRAINED = (1 shl 9); // 8+1; constraint_set1_flag + FF_PROFILE_H264_INTRA = (1 shl 11); // 8+3; constraint_set3_flag + + FF_PROFILE_H264_BASELINE = 66; + FF_PROFILE_H264_CONSTRAINED_BASELINE = (66 or FF_PROFILE_H264_CONSTRAINED); + FF_PROFILE_H264_MAIN = 77; + FF_PROFILE_H264_EXTENDED = 88; + FF_PROFILE_H264_HIGH = 100; + FF_PROFILE_H264_HIGH_10 = 110; + FF_PROFILE_H264_HIGH_10_INTRA = (110 or FF_PROFILE_H264_INTRA); + FF_PROFILE_H264_HIGH_422 = 122; + FF_PROFILE_H264_HIGH_422_INTRA = (122 or FF_PROFILE_H264_INTRA); + FF_PROFILE_H264_HIGH_444 = 144; + FF_PROFILE_H264_HIGH_444_PREDICTIVE = 244; + FF_PROFILE_H264_HIGH_444_INTRA = (244 or FF_PROFILE_H264_INTRA); + FF_PROFILE_H264_CAVLC_444 = 44; + + FF_PROFILE_VC1_SIMPLE = 0; + FF_PROFILE_VC1_MAIN = 1; + FF_PROFILE_VC1_COMPLEX = 2; + FF_PROFILE_VC1_ADVANCED = 3; + + FF_PROFILE_MPEG4_SIMPLE = 0; + FF_PROFILE_MPEG4_SIMPLE_SCALABLE = 1; + FF_PROFILE_MPEG4_CORE = 2; + FF_PROFILE_MPEG4_MAIN = 3; + FF_PROFILE_MPEG4_N_BIT = 4; + FF_PROFILE_MPEG4_SCALABLE_TEXTURE = 5; + FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION = 6; + FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE = 7; + FF_PROFILE_MPEG4_HYBRID = 8; + FF_PROFILE_MPEG4_ADVANCED_REAL_TIME = 9; + FF_PROFILE_MPEG4_CORE_SCALABLE = 10; + FF_PROFILE_MPEG4_ADVANCED_CODING = 11; + FF_PROFILE_MPEG4_ADVANCED_CORE = 12; + FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE = 13; + FF_PROFILE_MPEG4_SIMPLE_STUDIO = 14; + FF_PROFILE_MPEG4_ADVANCED_SIMPLE = 15; + + FF_LEVEL_UNKNOWN = -99; + +type + 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, + + (** + * Recommmends skipping the specified number of samples + * @code + * u32le number of samples to skip from start of this packet + * u32le number of samples to skip from end of this packet + * u8 reason for start skip + * u8 reason for end skip (0=padding silence, 1=convergence) + * @endcode + *) + AV_PKT_DATA_SKIP_SAMPLES=70, + + (** + * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that + * the packet may contain "dual mono" audio specific to Japanese DTV + * and if it is true, recommends only the selected channel to be used. + * @code + * u8 selected channels (0=mail/left, 1=sub/right, 2=both) + * @endcode + *) + AV_PKT_DATA_JP_DUALMONO + ); + + TAVPacketSideDataType = record + data: PByte; + size: cint; + type_: AVPacketSideDataType; + end; + PAVPacketSideDataType = ^TAVPacketSideDataType; + + PAVPacket = ^TAVPacket; + TAVPacket = record + (* + * 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. + *) + pts: cint64; + (* + * 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. + *) + dts: cint64; + data: PByteArray; + size: cint; + stream_index: cint; + (** + * A combination of AV_PKT_FLAG values + *) + flags: cint; + (** + * Additional packet data that can be provided by the container. + * Packet can contain several types of side information. + *) + side_data: PAVPacketSideDataType; + side_data_elems: cint; + (* + * Duration of this packet in AVStream->time_base units, 0 if unknown. + * Equals next_pts - this_pts in presentation order. + *) + duration: cint; + destruct: procedure (para1: PAVPacket); cdecl; + priv: pointer; + pos: cint64; // 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 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. + *) + convergence_duration: cint64; + end; {TAVPacket} + +const + AV_PKT_FLAG_KEY = $0001; ///< The packet contains a keyframe + AV_PKT_FLAG_CORRUPT = $0002; ///< The packet content is corrupted + + AV_NUM_DATA_POINTERS = 8; + +type + AVSideDataParamChangeFlags = ( + AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT = $0001, + AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = $0002, + AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE = $0004, + AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS = $0008 + ); + +const + FF_DECODE_ERROR_INVALID_BITSTREAM = 1; + FF_DECODE_ERROR_MISSING_REFERENCE = 2; + +type + PAVCodecContext = ^TAVCodecContext; + +(** + * Audio Video Frame. + * New fields can be added to the end of AVFRAME with minor version + * bumps. Similarly fields that are marked as to be only accessed by + * av_opt_ptr() can be reordered. This allows 2 forks to add fields + * without breaking compatibility with each other. + * Removal, reordering and changes in the remaining cases require + * a major version bump. + * sizeof(AVFrame) must not be used outside libavcodec. + *) + PAVFrame = ^TAVFrame; + TAVFrame = record + (** + * 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() + *) + data: array [0..AV_NUM_DATA_POINTERS - 1] of pbyte; + + (** + * 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() + *) + linesize: array [0..AV_NUM_DATA_POINTERS - 1] of cint; + + (** + * 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: unused + * decoding: set by AVCodecContext.get_buffer() + *) + extended_data: pointer of pbyte; + + (** + * width and height of the video frame + * - encoding: unused + * - decoding: Read by user. + *) + width, height: cint; + + (** + * number of audio samples (per channel) described by this frame + * - encoding: Set by user + * - decoding: Set by libavcodec + *) + nb_samples: cint; + + (** + * format of the frame, -1 if unknown or unset + * Values correspond to enum PixelFormat for video frames, + * enum AVSampleFormat for audio) + * - encoding: unused + * - decoding: Read by user. + *) + format: cint; + + (** + * 1 -> keyframe, 0-> not + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. + *) + key_frame: cint; + + (** + * 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. + *) + pict_type: TAVPictureType; + + (** + * 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: + *) + base: array [0..AV_NUM_DATA_POINTERS - 1] of pbyte; + + (** + * sample aspect ratio for the video frame, 0/1 if unknown/unspecified + * - encoding: unused + * - decoding: Read by user. + *) + sample_aspect_ratio: TAVRational; + + (** + * 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. + *) + pts: cint64; + + (** + * reordered pts from the last AVPacket that has been input into the decoder + * - encoding: unused + * - decoding: Read by user. + *) + pkt_pts: cint64; + + (** + * dts from the last AVPacket that has been input into the decoder + * - encoding: unused + * - decoding: Read by user. + *) + pkt_dts: cint64; + + (** + * picture number in bitstream order + * - encoding: set by + * - decoding: Set by libavcodec. + *) + coded_picture_number: cint; + + (** + * picture number in display order + * - encoding: set by + * - decoding: Set by libavcodec. + *) + display_picture_number: cint; + + (** + * 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. + *) + quality: cint; + + (** + * 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)). + *) + reference: cint; + + (** + * QP table + * - encoding: unused + * - decoding: Set by libavcodec. + *) + qscale_table: PShortint; + + (** + * QP store stride + * - encoding: unused + * - decoding: Set by libavcodec. + *) + qstride: cint; + + (** + * + *) + qscale_type: cint; + + (** + * mbskip_table[mb]>=1 if MB didn't change + * stride= mb_width = (width+15)>>4 + * - encoding: unused + * - decoding: Set by libavcodec. + *) + mbskip_table: pbyte; + + (** + * 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]; + motion_val: array [0..1] of pointer; + + (** + * macroblock type table + * mb_type_base + mb_width + 2 + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + mb_type: PCuint; + + (** + * DCT coefficients + * - encoding: unused + * - decoding: Set by libavcodec. + *) + dct_coeff: PsmallInt; + + (** + * motion reference frame index + * the order in which these are stored can depend on the codec. + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + ref_index: array [0..1] of PShortint; + + (** + * for some private data of the user + * - encoding: unused + * - decoding: Set by user. + *) + opaque: pointer; + + (** + * error + * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR. + * - decoding: unused + *) + error: array [0..AV_NUM_DATA_POINTERS - 1] of cuint64; + + (** + * 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. + *) + type_: cint; + + (** + * When decoding, this signals how much the picture must be delayed. + * extra_delay = repeat_pict / (2*fps) + * - encoding: unused + * - decoding: Set by libavcodec. + *) + repeat_pict: cint; + + (** + * The content of the picture is interlaced. + * - encoding: Set by user. + * - decoding: Set by libavcodec. (default 0) + *) + interlaced_frame: cint; + + (** + * If the content is interlaced, is top field displayed first. + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + top_field_first: cint; + + (** + * Tell user application that palette has changed from previous frame. + * - encoding: ??? (no palette-enabled encoder yet) + * - decoding: Set by libavcodec. (default 0). + *) + palette_has_changed: cint; + + (** + * codec suggestion on buffer type if != 0 + * - encoding: unused + * - decoding: Set by libavcodec. (before get_buffer() call)). + *) + buffer_hints: cint; + + (** + * Pan scan. + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + pan_scan: PAVPanScan; + + (** + * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque + * 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. + *) + reordered_opaque: cint64; + + (** + * hardware accelerator private data (FFmpeg allocated) + * - encoding: unused + * - decoding: Set by libavcodec + *) + hwaccel_picture_private: pointer; + + (** + * the AVCodecContext which ff_thread_get_buffer() was last called on + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. + *) + owner: PAVCodecContext; + + (** + * used by multithreading to store frame-specific info + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. + *) + thread_opaque: pointer; + + (** + * 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. + *) + motion_subsample_log2: cuint8; + + (** + * Sample rate of the audio data. + * + * - encoding: unused + * - decoding: read by user + *) + sample_rate: cint; + + (** + * Channel layout of the audio data. + * + * - encoding: unused + * - decoding: read by user. + *) + channel_layout: cuint64; + + (** + * frame timestamp estimated using various heuristics, in stream time base + * Code outside libavcodec should access this field using: + * av_frame_get_best_effort_timestamp(frame) + * - encoding: unused + * - decoding: set by libavcodec, read by user. + *) + best_effort_timestamp: cint64; + + (** + * reordered pos from the last AVPacket that has been input into the decoder + * Code outside libavcodec should access this field using: + * av_frame_get_pkt_pos(frame) + * - encoding: unused + * - decoding: Read by user. + *) + pkt_pos: cint64; + + (** + * duration of the corresponding packet, expressed in + * AVStream->time_base units, 0 if unknown. + * Code outside libavcodec should access this field using: + * av_frame_get_pkt_duration(frame) + * - encoding: unused + * - decoding: Read by user. + *) + pkt_duration: cint64; + + (** + * metadata. + * Code outside libavcodec should access this field using: + * av_frame_get_metadata(frame) + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + metadata: PAVDictionary; + + (** + * decode error flags of the frame, set to a combination of + * FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there + * were errors during the decoding. + * Code outside libavcodec should access this field using: + * av_frame_get_decode_error_flags(frame) + * - encoding: unused + * - decoding: set by libavcodec, read by user. + *) + decode_error_flags: cint; + + (** + * number of audio channels, only used for audio. + * Code outside libavcodec should access this field using: + * av_frame_get_channels(frame) + * - encoding: unused + * - decoding: Read by user. + *) + channels: cint64; + end; {TAVFrame} + +(** + * Accessors for some AVFrame fields. + * The position of these field in the structure is not part of the ABI, + * they should not be accessed directly outside libavcodec. + *) +function av_frame_get_best_effort_timestamp(frame: {const} PAVFrame): cint64; + cdecl; external av__codec; +procedure av_frame_set_best_effort_timestamp(frame: PAVFrame; val: cint64); + cdecl; external av__codec; +function av_frame_get_pkt_duration (frame: {const} PAVFrame): cint64; + cdecl; external av__codec; +procedure av_frame_get_pkt_duration (frame: PAVFrame; val: cint64); + cdecl; external av__codec; +function av_frame_get_pkt_pos (frame: {const} PAVFrame): cint64; + cdecl; external av__codec; +procedure av_frame_get_pkt_pos (frame: PAVFrame; val: cint64); + cdecl; external av__codec; +function av_frame_get_channel_layout (frame: {const} PAVFrame): cint64; + cdecl; external av__codec; +procedure av_frame_get_channel_layout (frame: PAVFrame; val: cint64); + cdecl; external av__codec; +function av_frame_get_channels (frame: {const} PAVFrame): cint; + cdecl; external av__codec; +procedure av_frame_set_channels (frame: PAVFrame; val: cint); + cdecl; external av__codec; +function av_frame_get_sample_rate (frame: {const} PAVFrame): cint; + cdecl; external av__codec; +procedure av_frame_set_sample_rate (frame: PAVFrame; val: cint); + cdecl; external av__codec; +function av_frame_get_metadata (frame: {const} PAVFrame): PAVDictionary; + cdecl; external av__codec; +procedure av_frame_set_metadata (frame: PAVFrame; val: PAVDictionary); + cdecl; external av__codec; +function av_frame_get_decode_error_flags (frame: {const} PAVFrame): cint; + cdecl; external av__codec; +procedure av_frame_set_decode_error_flags (frame: PAVFrame; val: cint); + cdecl; external av__codec; + +type + TAVCodecInternal = record + end; + PAVCodecInternal = ^TAVCodecInternal; + + PAVClass = ^TAVClass; + + PPAVCodec = ^PAVCodec; + PAVCodec = ^TAVCodec; + + PAVHWAccel = ^TAVHWAccel; + + // int[4] + PAVNDPArray = ^TAVNDPArray; + TAVNDPArray = array [0..AV_NUM_DATA_POINTERS - 1] of cint; + // int (*func)(struct AVCodecContext *c2, void *arg) + TExecuteFunc = function(c2: PAVCodecContext; arg: Pointer): cint; cdecl; + // int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr) + TExecute2Func = function(c2: PAVCodecContext; arg: Pointer; jobnr: cint; threadnr: cint): cint; cdecl; + + 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. + * Please use AVOptions (av_opt* / av_set/get*()) to access these fields from user + * applications. + * sizeof(AVCodecContext) must not be used outside libav*. + *) + TAVCodecContext = record {720} + (** + * information on struct for av_log + * - set by avcodec_alloc_context3 + *) + av_class: PAVClass; + log_level_offset: cint; + + codec_type: TAVMediaType; (* see AVMEDIA_TYPE_xxx *) + codec: PAVCodec; + codec_name: array [0..31] of AnsiChar; + codec_id: TAVCodecID; (* 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. + *) + codec_tag: cuint; + + (** + * 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. + *) + stream_codec_tag: cuint; + +{$IF FF_API_SUB_ID} + (** + * @deprecated this field is unused + *) + sub_id: cint; +{$IFEND} + + priv_data: pointer; + + (** + * Private context used for internal data. + * + * Unlike priv_data, this is not codec-specific. It is used in general + * libavcodec functions. + *) + internal: PAVCodecInternal; + + (** + * Private data of the user, can be used to carry app specific stuff. + * - encoding: Set by user. + * - decoding: Set by user. + *) + opaque: pointer; + + (** + * 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. + *) + bit_rate: cint; + + (** + * 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 + *) + bit_rate_tolerance: cint; + + (** + * 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 + *) + global_quality: cint; + + (** + * - encoding: Set by user. + * - decoding: unused + *) + compression_level: cint; + + (** + * CODEC_FLAG_*. + * - encoding: Set by user. + * - decoding: Set by user. + *) + flags: cint; + + (** + * CODEC_FLAG2_* + * - encoding: Set by user. + * - decoding: Set by user. + *) + flags2: cint; + + (** + * 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. + *) + extradata: pbyte; + extradata_size: cint; + + (** + * 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. + *) + time_base: TAVRational; + + (** + * 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. + *) + ticks_per_frame: cint; + + (** + * Encoding: Number of frames delay there will be from the encoder input to + * the decoder output. (we assume the decoder matches the spec) + * Decoding: Number of frames delay in addition to what a standard decoder + * as specified in the spec would produce. + * + * Video: + * Number of frames the decoded output will be delayed relative to the + * encoded input. + * + * Audio: + * Number of "priming" samples added to the beginning of the stream + * during encoding. The decoded output will be delayed by this many + * samples relative to the input to the encoder. Note that this field is + * purely informational and does not directly affect the pts output by + * the encoder, which should always be based on the actual presentation + * time, including any delay. + * + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. + *) + delay: cint; + + (* 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. + *) + width, height: cint; + + (** + * Bitstream width / height, may be different from width/height if lowres enabled. + * - encoding: unused + * - decoding: Set by user before init if known. Codec should override / dynamically change if needed. + *) + coded_width, coded_height: cint; + + (** + * the number of pictures in a group of pictures, or 0 for intra_only + * - encoding: Set by user. + * - decoding: unused + *) + gop_size: cint; + + (** + * Pixel format, see PIX_FMT_xxx. + * May be set by the demuxer if known from headers. + * May be overridden by the decoder if it knows better. + * - encoding: Set by user. + * - decoding: Set by user if known, overridden by libavcodec if known + *) + pix_fmt: TAVPixelFormat; + + (** + * 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 + *) + me_method: cint; + + (** + * 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. + * 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 + *) + draw_horiz_band: procedure (s: PAVCodecContext; + src: {const} PAVFrame; offset: PAVNDPArray; + y: cint; type_: cint; height: cint); cdecl; + + (** + * 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. + *) + get_format: function (s: PAVCodecContext; fmt: {const} PAVPixelFormat): TAVPixelFormat; cdecl; + + (** + * 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 + *) + max_b_frames: cint; + + (** + * 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 + *) + b_quant_factor: cfloat; + + (** obsolete FIXME remove *) + rc_strategy: cint; + + b_frame_strategy: cint; + +{$IFDEF FF_API_MPV_GLOBAL_OPTS} + (** + * luma single coefficient elimination threshold + * - encoding: Set by user. + * - decoding: unused + *) + luma_elim_threshold: cint; {deprecated} + + (** + * chroma single coeff elimination threshold + * - encoding: Set by user. + * - decoding: unused + *) + chroma_elim_threshold: cint; {deprecated} +{$ENDIF} + + (** + * qscale offset between IP and B-frames + * - encoding: Set by user. + * - decoding: unused + *) + b_quant_offset: cfloat; + + (** + * 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. + *) + has_b_frames: cint; + + (** + * 0-> h263 quant 1-> mpeg quant + * - encoding: Set by user. + * - decoding: unused + *) + mpeg_quant: cint; + + (** + * 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 + *) + i_quant_factor: cfloat; + + (** + * qscale offset between P and I-frames + * - encoding: Set by user. + * - decoding: unused + *) + i_quant_offset: cfloat; + + (** + * luminance masking (0-> disabled) + * - encoding: Set by user. + * - decoding: unused + *) + lumi_masking: cfloat; + + (** + * temporary complexity masking (0-> disabled) + * - encoding: Set by user. + * - decoding: unused + *) + temporal_cplx_masking: cfloat; + + (** + * spatial complexity masking (0-> disabled) + * - encoding: Set by user. + * - decoding: unused + *) + spatial_cplx_masking: cfloat; + + (** + * p block masking (0-> disabled) + * - encoding: Set by user. + * - decoding: unused + *) + p_masking: cfloat; + + (** + * darkness masking (0-> disabled) + * - encoding: Set by user. + * - decoding: unused + *) + dark_masking: cfloat; + + (** + * slice count + * - encoding: Set by libavcodec. + * - decoding: Set by user (or 0). + *) + slice_count: cint; + + (** + * prediction method (needed for huffyuv) + * - encoding: Set by user. + * - decoding: unused + *) + prediction_method: cint; + + (** + * slice offsets in the frame in bytes + * - encoding: Set/allocated by libavcodec. + * - decoding: Set/allocated by user (or NULL). + *) + slice_offset: PCint; + + (** + * 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. + *) + sample_aspect_ratio: TAVRational; + + (** + * motion estimation comparison function + * - encoding: Set by user. + * - decoding: unused + *) + me_cmp: cint; + + (** + * subpixel motion estimation comparison function + * - encoding: Set by user. + * - decoding: unused + *) + me_sub_cmp: cint; + (** + * macroblock comparison function (not supported yet) + * - encoding: Set by user. + * - decoding: unused + *) + mb_cmp: cint; + (** + * interlaced DCT comparison function + * - encoding: Set by user. + * - decoding: unused + *) + ildct_cmp: cint; + + (** + * ME diamond size & shape + * - encoding: Set by user. + * - decoding: unused + *) + dia_size: cint; + + (** + * amount of previous MV predictors (2a+1 x 2a+1 square) + * - encoding: Set by user. + * - decoding: unused + *) + last_predictor_count: cint; + + (** + * prepass for motion estimation + * - encoding: Set by user. + * - decoding: unused + *) + pre_me: cint; + + (** + * motion estimation prepass comparison function + * - encoding: Set by user. + * - decoding: unused + *) + me_pre_cmp: cint; + + (** + * ME prepass diamond size & shape + * - encoding: Set by user. + * - decoding: unused + *) + pre_dia_size: cint; + + (** + * subpel ME quality + * - encoding: Set by user. + * - decoding: unused + *) + me_subpel_quality: cint; + + (** + * 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. + *) + dtg_active_format: cint; + + (** + * maximum motion estimation search range in subpel units + * If 0 then no limit. + * + * - encoding: Set by user. + * - decoding: unused + *) + me_range: cint; + + (** + * intra quantizer bias + * - encoding: Set by user. + * - decoding: unused + *) + intra_quant_bias: cint; + + (** + * inter quantizer bias + * - encoding: Set by user. + * - decoding: unused + *) + inter_quant_bias: cint; + +{$IFDEF 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 + *) + color_table_id: cint; {deprecated} +{$ENDIF} + + (** + * slice flags + * - encoding: unused + * - decoding: Set by user. + *) + slice_flags: cint; + + (** + * XVideo Motion Acceleration + * - encoding: forbidden + * - decoding: set by decoder + *) + xvmc_acceleration: cint; + + (** + * macroblock decision mode + * - encoding: Set by user. + * - decoding: unused + *) + mb_decision: cint; + + (** + * custom intra quantization matrix + * - encoding: Set by user, can be NULL. + * - decoding: Set by libavcodec. + *) + intra_matrix: PWord; + + (** + * custom inter quantization matrix + * - encoding: Set by user, can be NULL. + * - decoding: Set by libavcodec. + *) + inter_matrix: PWord; + + (** + * scene change detection threshold + * 0 is default, larger means fewer detected scene changes. + * - encoding: Set by user. + * - decoding: unused + *) + scenechange_threshold: cint; + + (** + * noise reduction strength + * - encoding: Set by user. + * - decoding: unused + *) + noise_reduction: cint; + +{$IFDEF FF_API_INTER_THRESHOLD} + (** + * + * - encoding: Set by user. + * - decoding: unused + *) + inter_threshold: cint; {deprecated} +{$ENDIF} + +{$IFDEF FF_API_MPV_GLOBAL_OPTS} + (** + * quantizer noise shaping + * - encoding: Set by user. + * - decoding: unused + *) + quantizer_noise_shaping: cint; {deprecated} +{$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 + *) + me_threshold: cint; + + (** + * Macroblock threshold below which the user specified macroblock types will be used. + * - encoding: Set by user. + * - decoding: unused + *) + mb_threshold: cint; + + (** + * precision of the intra DC coefficient - 8 + * - encoding: Set by user. + * - decoding: unused + *) + intra_dc_precision: cint; + + (** + * Number of macroblock rows at the top which are skipped. + * - encoding: unused + * - decoding: Set by user. + *) + skip_top: cint; + + (** + * Number of macroblock rows at the bottom which are skipped. + * - encoding: unused + * - decoding: Set by user. + *) + skip_bottom: cint; + + (** + * Border processing masking, raises the quantizer for mbs on the borders + * of the picture. + * - encoding: Set by user. + * - decoding: unused + *) + border_masking: cfloat; + + (** + * minimum MB lagrange multipler + * - encoding: Set by user. + * - decoding: unused + *) + mb_lmin: cint; + + (** + * maximum MB lagrange multipler + * - encoding: Set by user. + * - decoding: unused + *) + mb_lmax: cint; + + (** + * + * - encoding: Set by user. + * - decoding: unused + *) + me_penalty_compensation: cint; + + (** + * + * - encoding: Set by user. + * - decoding: unused + *) + bidir_refine: cint; + + (** + * + * - encoding: Set by user. + * - decoding: unused + *) + brd_scale: cint; + + (** + * minimum GOP size + * - encoding: Set by user. + * - decoding: unused + *) + keyint_min: cint; + + (** + * number of reference frames + * - encoding: Set by user. + * - decoding: Set by lavc. + *) + refs: cint; + + (** + * chroma qp offset from luma + * - encoding: Set by user. + * - decoding: unused + *) + chromaoffset: cint; + + (** + * Multiplied by qscale for each frame and added to scene_change_score. + * - encoding: Set by user. + * - decoding: unused + *) + scenechange_factor: cint; + + (** + * + * Note: Value depends upon the compare function used for fullpel ME. + * - encoding: Set by user. + * - decoding: unused + *) + mv0_threshold: cint; + + (** + * Adjust sensitivity of b_frame_strategy 1. + * - encoding: Set by user. + * - decoding: unused + *) + b_sensitivity: cint; + + (** + * Chromaticity coordinates of the source primaries. + * - encoding: Set by user + * - decoding: Set by libavcodec + *) + color_primaries: TAVColorPrimaries; + + (** + * Color Transfer Characteristic. + * - encoding: Set by user + * - decoding: Set by libavcodec + *) + color_trc: TAVColorTransferCharacteristic; + + (** + * YUV colorspace type. + * - encoding: Set by user + * - decoding: Set by libavcodec + *) + colorspace: TAVColorSpace; + + (** + * MPEG vs JPEG YUV range. + * - encoding: Set by user + * - decoding: Set by libavcodec + *) + color_range: TAVColorRange; + + (** + * This defines the location of chroma samples. + * - encoding: Set by user + * - decoding: Set by libavcodec + *) + chroma_sample_location: TAVChromaLocation; + + (** + * Number of slices. + * Indicates number of picture subdivisions. Used for parallelized + * decoding. + * - encoding: Set by user + * - decoding: unused + *) + slices: cint; + + (** Field order + * - encoding: set by libavcodec + * - decoding: Set by libavcodec + *) + field_order: AVFieldOrder; + + (* audio only *) + sample_rate: cint; ///< samples per second + channels: cint; ///< number of audio channels + + (** + * audio sample format + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + sample_fmt: TAVSampleFormat; ///< sample format + + (* The following data should not be initialized. *) + (** + * Samples per packet, initialized when calling 'init'. + *) + frame_size: cint; + + (** + * 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. + *) + frame_number: cint; ///< audio or video frame number + + (** + * number of bytes per packet if constant and known or 0 + * Used by some WAV based audio codecs. + *) + block_align: cint; + + (** + * Audio cutoff bandwidth (0 means "automatic") + * - encoding: Set by user. + * - decoding: unused + *) + cutoff: cint; + +{$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. + *) + request_channels: cint; {deprecated} +{$IFEND} + + (** + * Audio channel layout. + * - encoding: set by user. + * - decoding: set by libavcodec. + *) + channel_layout: cuint64; + + (** + * Request decoder to use this channel layout if it can (0 for default) + * - encoding: unused + * - decoding: Set by user. + *) + request_channel_layout: cuint64; + + (** + * Type of service that the audio stream conveys. + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + audio_service_type: TAVAudioServiceType; + + (** + * desired sample format + * - encoding: Not used. + * - decoding: Set by user. + * Decoder will decode to this format if it can. + *) + request_sample_fmt: TAVSampleFormat; + + (** + * 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. + * + * 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. + *) + get_buffer: function (c: PAVCodecContext; pic: PAVFrame): cint; cdecl; + + (** + * Called to release buffers which were allocated with get_buffer. + * A released buffer can be reused in get_buffer(). + * pic.data[*] must be set to NULL. + * - encoding: unused + * - decoding: Set by libavcodec, user can override. + *) + release_buffer: procedure (c: PAVCodecContext; pic: PAVFrame); cdecl; + + (** + * 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 + *) + reget_buffer: function (c: PAVCodecContext; pic: PAVFrame): cint; cdecl; + + (* - encoding parameters *) + qcompress: cfloat; ///< amount of qscale change between easy & hard scenes (0.0-1.0) + qblur: cfloat; ///< amount of qscale smoothing over time (0.0-1.0) + + (** + * minimum quantizer + * - encoding: Set by user. + * - decoding: unused + *) + qmin: cint; + + (** + * maximum quantizer + * - encoding: Set by user. + * - decoding: unused + *) + qmax: cint; + + (** + * maximum quantizer difference between frames + * - encoding: Set by user. + * - decoding: unused + *) + max_qdiff: cint; + + (** + * 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 + *) + rc_qsquish: cfloat; + + rc_qmod_amp: cfloat; + rc_qmod_freq: cint; + + (** + * decoder bitstream buffer size + * - encoding: Set by user. + * - decoding: unused + *) + rc_buffer_size: cint; + (** + * ratecontrol override, see RcOverride + * - encoding: Allocated/set/freed by user. + * - decoding: unused + *) + rc_override_count: cint; + rc_override: PRcOverride; + + (** + * rate control equation + * - encoding: Set by user + * - decoding: unused + *) + rc_eq: {const} PAnsiChar; + + (** + * maximum bitrate + * - encoding: Set by user. + * - decoding: unused + *) + rc_max_rate: cint; + + (** + * minimum bitrate + * - encoding: Set by user. + * - decoding: unused + *) + rc_min_rate: cint; + + rc_buffer_aggressivity: cfloat; + + (** + * initial complexity for pass1 ratecontrol + * - encoding: Set by user. + * - decoding: unused + *) + rc_initial_cplx: cfloat; + + (** + * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow. + * - encoding: Set by user. + * - decoding: unused. + *) + rc_max_available_vbv_use: cfloat; + + (** + * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow. + * - encoding: Set by user. + * - decoding: unused. + *) + rc_min_vbv_overflow_use: cfloat; + + (** + * Number of bits which should be loaded into the rc buffer before decoding starts. + * - encoding: Set by user. + * - decoding: unused + *) + rc_initial_buffer_occupancy: cint; + + (** + * coder type + * - encoding: Set by user. + * - decoding: unused + *) + coder_type: cint; + + (** + * context model + * - encoding: Set by user. + * - decoding: unused + *) + context_model: cint; + + (** + * minimum Lagrange multipler + * - encoding: Set by user. + * - decoding: unused + *) + lmin: cint; + + (** + * maximum Lagrange multipler + * - encoding: Set by user. + * - decoding: unused + *) + lmax: cint; + + (** + * frame skip threshold + * - encoding: Set by user. + * - decoding: unused + *) + frame_skip_threshold: cint; + + (** + * frame skip factor + * - encoding: Set by user. + * - decoding: unused + *) + frame_skip_factor: cint; + + (** + * frame skip exponent + * - encoding: Set by user. + * - decoding: unused + *) + frame_skip_exp: cint; + + (** + * frame skip comparison function + * - encoding: Set by user. + * - decoding: unused + *) + frame_skip_cmp: cint; + + (** + * trellis RD quantization + * - encoding: Set by user. + * - decoding: unused + *) + trellis: cint; + + (** + * - encoding: Set by user. + * - decoding: unused + *) + min_prediction_order: cint; + + (** + * - encoding: Set by user. + * - decoding: unused + *) + max_prediction_order: cint; + + (** + * GOP timecode frame start number, in non drop frame format + * - encoding: Set by user, in non drop frame format + * - decoding: Set by libavcodec (timecode in the 25 bits format, -1 if unset) + *) + timecode_frame_start: cint64; + + (* The RTP callback: This function is called *) + (* every time the encoder has a packet to send *) + (* 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 *) + rtp_callback: procedure (avctx: PAVCodecContext; data: pointer; + size: cint; mb_nb: cint); cdecl; + + rtp_payload_size: cint; (* The size of the RTP payload: the coder will *) + (* do it's 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 transmited RTP payload *) + + (* statistics, used for 2-pass encoding *) + mv_bits: cint; + header_bits: cint; + i_tex_bits: cint; + p_tex_bits: cint; + i_count: cint; + p_count: cint; + skip_count: cint; + misc_bits: cint; + + (** + * number of bits used for the previously encoded frame + * - encoding: Set by libavcodec. + * - decoding: unused + *) + frame_bits: cint; + + (** + * pass1 encoding statistics output buffer + * - encoding: Set by libavcodec. + * - decoding: unused + *) + stats_out: PAnsiChar; + + (** + * pass2 encoding statistics input buffer + * Concatenated stuff from stats_out of pass1 should be placed here. + * - encoding: Allocated/set/freed by user. + * - decoding: unused + *) + stats_in: PAnsiChar; + + (** + * Work around bugs in encoders which sometimes cannot be detected automatically. + * - encoding: Set by user + * - decoding: Set by user + *) + workaround_bugs: cint; + + (** + * 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) + *) + strict_std_compliance: cint; + + (** + * error concealment flags + * - encoding: unused + * - decoding: Set by user. + *) + error_concealment: cint; + + (** + * debug + * - encoding: Set by user. + * - decoding: Set by user. + *) + debug: cint; + + (** + * debug + * - encoding: Set by user. + * - decoding: Set by user. + *) + debug_mv: cint; + + (** + * Error recognition; may misdetect some more or less valid parts as errors. + * - encoding: unused + * - decoding: Set by user. + *) + err_recognition: cint; + + (** + * opaque 64bit number (generally a PTS) that will be reordered and + * output in AVFrame.reordered_opaque + * - encoding: unused + * - decoding: Set by user. + *) + reordered_opaque: cint64; + + (** + * Hardware accelerator in use + * - encoding: unused. + * - decoding: Set by libavcodec + *) + hwaccel: PAVHWAccel; + + (** + * Hardware accelerator context. + * For some hardware accelerators, a global context needs to be + * provided by the user. In that case, this holds display-dependent + * data FFmpeg cannot instantiate itself. Please refer to the + * FFmpeg HW accelerator documentation to know how to fill this + * is. e.g. for VA API, this is a struct vaapi_context. + * - encoding: unused + * - decoding: Set by user + *) + hwaccel_context: pointer; + + (** + * error + * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR. + * - decoding: unused + *) + error: array [0..AV_NUM_DATA_POINTERS - 1] of cuint64; + + (** + * DCT algorithm, see FF_DCT_* below + * - encoding: Set by user. + * - decoding: unused + *) + dct_algo: cint; + + (** + * IDCT algorithm, see FF_IDCT_* below. + * - encoding: Set by user. + * - decoding: Set by user. + *) + idct_algo: cint; + +{$IF FF_API_DSP_MASK} + (** + * Unused. + * @deprecated use av_set_cpu_flags_mask() instead. + *) + dsp_mask: cuint; {deprecated} +{$IFEND} + + (** + * bits per sample/pixel from the demuxer (needed for huffyuv). + * - encoding: Set by libavcodec. + * - decoding: Set by user. + *) + bits_per_coded_sample: cint; + + (** + * Bits per sample/pixel of internal libavcodec pixel/sample format. + * - encoding: set by user. + * - decoding: set by libavcodec. + *) + bits_per_raw_sample: cint; + + (** + * low resolution decoding, 1-> 1/2 size, 2->1/4 size + * - encoding: unused + * - decoding: Set by user. + *) + lowres: cint; + + (** + * the picture in the bitstream + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. + *) + coded_frame: PAVFrame; + + (** + * thread count + * is used to decide how many independent tasks should be passed to execute() + * - encoding: Set by user. + * - decoding: Set by user. + *) + thread_count: cint; + + (** + * 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. + *) + thread_type: cint; + + (** + * Which multithreading methods are in use by the codec. + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. + *) + active_thread_type: cint; + + (** + * Set by the client if its custom get_buffer() callback can be called + * from another thread, which allows faster multithreaded decoding. + * draw_horiz_band() will be called from other threads regardless of this setting. + * Ignored if the default get_buffer() is used. + * - encoding: Set by user. + * - decoding: Set by user. + *) + thread_safe_callbacks: cint; + + (** + * 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. + *) + execute: function (c: PAVCodecContext; func: TExecuteFunc; arg: Pointer; ret: PCint; count: cint; size: cint): cint; cdecl; + + (** + * 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. + *) + execute2: function (c: PAVCodecContext; func: TExecute2Func; arg2: Pointer; ret: Pcint; count: cint): cint; cdecl; + + (** + * thread opaque + * Can be used by execute() to store some per AVCodecContext stuff. + * - encoding: set by execute() + * - decoding: set by execute() + *) + thread_opaque: pointer; + + (** + * noise vs. sse weight for the nsse comparsion function + * - encoding: Set by user. + * - decoding: unused + *) + nsse_weight: cint; + + (** + * profile + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + profile: cint; + + (** + * level + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + level: cint; + + (** + * + * - encoding: unused + * - decoding: Set by user. + *) + skip_loop_filter: TAVDiscard; + + (** + * + * - encoding: unused + * - decoding: Set by user. + *) + skip_idct: TAVDiscard; + + (** + * + * - encoding: unused + * - decoding: Set by user. + *) + skip_frame: TAVDiscard; + + (** + * 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()) + *) + subtitle_header: Pcuint8; + subtitle_header_size: cint; + + (** + * Simulates errors in the bitstream to test error concealment. + * - encoding: Set by user. + * - decoding: unused + *) + error_rate: cint; + + (** + * 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 + *) + pkt: PAVPacket; + + (** + * 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. + *) + vbv_delay: cuint64; + + (** + * Timebase in which pkt_dts/pts and AVPacket.dts/pts are. + * Code outside libavcodec should access this field using: + * avcodec_set_pkt_timebase(avctx) + * - encoding unused. + * - decodimg set by user + *) + pkt_timebase: PAVRational; + + (** + * AVCodecDescriptor + * Code outside libavcodec should access this field using: + * avcodec_get_codec_descriptior(avctx) + * - encoding: unused. + * - decoding: set by libavcodec. + *) + codec_descriptor: PAVCodecDescriptor; + + (** + * Current statistics for PTS correction. + * - decoding: maintained and used by libavcodec, not intended to be used by user apps + * - encoding: unused + *) + pts_correction_num_faulty_pts: cint64; /// Number of incorrect PTS values so far + pts_correction_num_faulty_dts: cint64; /// Number of incorrect DTS values so far + pts_correction_last_pts: cint64; /// PTS of the last frame + pts_correction_last_dts: cint64; /// DTS of the last frame + + end; {TAVCodecContext} + + function av_codec_get_pkt_timebase(avctx: {const} PAVCodecContext): TAVRational; + procedure av_codec_set_pkt_timebase(avctx: {const} PAVCodecContext; val: TAVRational); + + function av_codec_get_codec_descriptor(avctx: {const} PAVCodecContext): PAVCodecDescriptor; + procedure av_codec_set_codec_descriptor(avctx: {const} PAVCodecContext; desc: {const} PAVCodecDescriptor); + +type + (** + * AVProfile. + *) + PAVProfile = ^TAVProfile; + TAVProfile = record + profile: cint; + name: {const} PAnsiChar; ///< short name for the profile + end; {TAVProfile} + + TAVSubtitle = record + end; + +(** + * AVCodec. + *) + TAVCodec = record + (** + * 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. + *) + name: PAnsiChar; + (** + * 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. + *) + long_name: {const} PAnsiChar; + type_: TAVMediaType; + id: TAVCodecID; + (** + * Codec capabilities. + * see CODEC_CAP_* + *) + capabilities: cint; + supported_framerates: {const} PAVRational; ///< array of supported framerates, or NULL if any, array is terminated by {0,0} + pix_fmts: {const} PAVPixelFormat; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1 + supported_samplerates: {const} PCint; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0 + sample_fmts: {const} PAVSampleFormatArray; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1 + channel_layouts: {const} PCuint64; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0 + max_lowres: byte; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0 + priv_class: {const} PAVClass; ///< AVClass for the private context + profiles: {const} PAVProfile; ///< 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. + ***************************************************************** + *) + priv_data_size: cint; + next: PAVCodec; + (** + * @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. + *) + init_thread_copy: function (avctx: PAVCodecContext): Pcint; cdecl; + (** + * 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. + *) + update_thread_context: function (dst: PAVCodecContext; src: {const} PAVCodecContext): cint; cdecl; + (** @} *) + + (** + * Private codec-specific defaults. + *) + defaults: {const} pointer; + + (** + * Initialize codec static data, called from avcodec_register(). + *) + init_static_data: procedure (codec: PAVCodec); cdecl; + + init: function (avctx: PAVCodecContext): cint; cdecl; + encode_sub: function (avctx: PAVCodecContext; buf: PByteArray; buf_size: cint; + sub: {const} PAVSubtitle): cint; cdecl; + (** + * 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 + *) + encode2: function (avctx: PAVCodecContext; avpkt: PAVPacket; frame: {const} PAVFrame; + got_packet_ptr: Pcint): cint; cdecl; + decode: function (avctx: PAVCodecContext; outdata: pointer; var outdata_size: cint; avpkt: PAVPacket): cint; cdecl; + close: function (avctx: PAVCodecContext): cint; cdecl; + (** + * Flush buffers. + * Will be called when seeking + *) + flush: procedure (avctx: PAVCodecContext); cdecl; + end; {TAVCodec} + +(** + * AVHWAccel. + *) + TAVHWAccel = record + (** + * 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). + *) + name: PAnsiChar; + + (** + * Type of codec implemented by the hardware accelerator. + * + * See AVMediaType_xxx + *) + type_: TAVMediaType; + + (** + * Codec implemented by the hardware accelerator. + * + * See AV_CODEC_ID_xxx + *) + id: TAVCodecID; + + (** + * Supported pixel format. + * + * Only hardware accelerated formats are supported here. + *) + pix_fmt: PAVPixelFormat; + + (** + * Hardware accelerated codec capabilities. + * see FF_HWACCEL_CODEC_CAP_* + *) + capabilities: cint; + + next: PAVHWAccel; + + (** + * 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 + *) + start_frame: function (avctx: PAVCodecContext; + buf: {const} PByteArray; + buf_size: cuint): cint; cdecl; + + (** + * 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 + *) + decode_slice: function (avctx: PAVCodecContext; + buf: {const} PByteArray; + buf_size: cuint): cint; cdecl; + + (** + * 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 + *) + end_frame: function (avctx: PAVCodecContext): cint; cdecl; + + (** + * Size of HW accelerator private data. + * + * Private data is allocated with av_mallocz() before + * AVCodecContext.get_buffer() and deallocated after + * AVCodecContext.release_buffer(). + *) + priv_data_size: cint; + end; {TAVHWAccel} + +(** + * @defgroup lavc_picture AVPicture + * + * Functions for working with AVPicture + * @{ + *) + +(** + * four components are given, that's all. + * the last component is alpha + *) + PAVPicture = ^TAVPicture; + TAVPicture = record + data: array [0..AV_NUM_DATA_POINTERS - 1] of PByteArray; + linesize: array [0..AV_NUM_DATA_POINTERS - 1] of cint; ///< number of bytes per line + end; {TAVPicture} + +/** + * @} + */ + + TAVSubtitleType = ( + 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 + ); {TAVSubtitleType} + + PPAVSubtitleRect = ^PAVSubtitleRect; + PAVSubtitleRect = ^TAVSubtitleRect; + TAVSubtitleRect = record + x: cint; ///< top left corner of pict, undefined when pict is not set + y: cint; ///< top left corner of pict, undefined when pict is not set + w: cint; ///< width of pict, undefined when pict is not set + h: cint; ///< height of pict, undefined when pict is not set + nb_colors: cint; ///< 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 + *) + pict: TAVPicture; + type_: TAVSubtitleType; + + text: PAnsiChar; ///< 0 terminated plain UTF-8 text + + (** + * 0 terminated ASS/SSA compatible event line. + * The presentation of this is unaffected by the other values in this + * struct. + *) + ass: PAnsiChar; + + (** + * 1 indicates this subtitle is a forced subtitle. + * A forced subtitle should be displayed even when subtitles are hidden. + *( + iforced: cint; + end; {TAVSubtitleRect} + + PPAVSubtitle = ^PAVSubtitle; + PAVSubtitle = ^TAVSubtitle; + TAVSubtitle = record + format: cuint16; (* 0 = graphics *) + start_display_time: cuint32; (* relative to packet pts, in ms *) + end_display_time: cuint32; (* relative to packet pts, in ms *) + num_rects: cuint; + rects: PPAVSubtitleRect; + pts: cint64; ///< Same as packet pts, in AV_TIME_BASE + end; {TAVSubtitle} + +(** + * 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. + *) +function av_codec_next(c: {const} PAVCodec): PAVCodec; + cdecl; external av__codec; + +(** + * Return the LIBAVCODEC_VERSION_INT constant. + *) +function avcodec_version(): cuint; + cdecl; external av__codec; + +(** + * Return the libavcodec build-time configuration. + *) +function avcodec_configuration(): PAnsiChar; + cdecl; external av__codec; + +(** + * Return the libavcodec license. + *) +function avcodec_license(): PAnsiChar; + cdecl; external av__codec; + +(** + * 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() + *) +procedure avcodec_register(codec: PAVCodec); + cdecl; external av__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 register_avcodec + * @see avcodec_register + * @see av_register_codec_parser + * @see av_register_bitstream_filter + *) +procedure avcodec_register_all(); + cdecl; external av__codec; + +{$IF FF_API_ALLOC_CONTEXT} +(** + * Allocate an AVCodecContext and sets it fields to default values. The + * resulting struct can be deallocated by simply calling av_free(). + * + * @return An AVCodecContext filled with default values or NULL on failure. + * @see avcodec_get_context_defaults + * + * @deprecated use avcodec_alloc_context3() + *) +function avcodec_alloc_context(): PAVCodecContext; + cdecl; external av__codec; deprecated; + +(** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API! + * we WILL change its arguments and name a few times! *) +function avcodec_alloc_context2(ctype: TAVMediaType): PAVCodecContext; + cdecl; external av__codec; deprecated; + +(** + * Set the fields of the given AVCodecContext to default values. + * + * @param s The AVCodecContext of which the fields should be set to default values. + * @deprecated use avcodec_get_context_defaults3 + *) +procedure avcodec_get_context_defaults(s: PAVCodecContext); + cdecl; external av__codec; deprecated; + +(** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API! + * we WILL change its arguments and name a few times! *) +procedure avcodec_get_context_defaults2(s: PAVCodecContext; ctype: TAVMediaType); + cdecl; external av__codec; deprecated; +{$IFEND} + +(** + * 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. + * + * @return An AVCodecContext filled with default values or NULL on failure. + * @see avcodec_get_context_defaults + *) +function avcodec_alloc_context3(codec: {const} PAVCodec): PAVCodecContext; + cdecl; external av__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. + *) +procedure avcodec_get_context_defaults3(s: PAVCodecContext; codec: {const} PAVCodec); + cdecl; external av__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(). + *) +function avcodec_get_class(): {const} PAVClass; + cdecl; external av__codec; + +(** + * Get the AVClass for AVFrame. It can be used in combination with + * AV_OPT_SEARCH_FAKE_OBJ for examining options. + * + * @see av_opt_find(). + *) +function avcodec_get_frame_class(): {const} PAVClass; + cdecl; external av__codec; + +(** + * Get the AVClass for AVSubtitleRect. It can be used in combination with + * AV_OPT_SEARCH_FAKE_OBJ for examining options. + * + * @see av_opt_find(). + *) +function avcodec_get_subtitle_rect_class(): {const} PAVClass; + cdecl; external av__codec; + +(** + * Copy the settings of the source AVCodecContext into the destination + * AVCodecContext. The resulting destination codec context will be + * unopened, i.e. you are required to call avcodec_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 + *) +function avcodec_copy_context(dest: PAVCodecContext; src: {const} PAVCodecContext): cint; + cdecl; external av__codec; + +(** + * 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 + *) +function avcodec_alloc_frame(): PAVFrame; + cdecl; external av__codec; + +(** + * Set the fields of the given AVFrame to default values. + * + * @param frame The AVFrame of which the fields should be set to default values. + *) +procedure avcodec_get_frame_defaults(frame: PAVFrame); + cdecl; external av__codec; + +(** + * 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()). + *) +procedure avcodec_free_frame(frame: PPAVFrame); + cdecl; external av__codec; + +{$IF FF_API_AVCODEC_OPEN} +(** + * Initialize the AVCodecContext to use the given AVCodec. Prior to using this + * function the context has to be allocated. + * + * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(), + * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for + * retrieving a codec. + * + * @warning This function is not thread safe! + * + * @code + * avcodec_register_all(); + * codec = avcodec_find_decoder(AV_CODEC_ID_H264); + * if (!codec) + * exit(1); + * + * context = avcodec_alloc_context3(codec); + * + * if (avcodec_open(context, codec) < 0) + * exit(1); + * @endcode + * + * @param avctx The context which will be set up to use the given codec. + * @param codec The codec to use within the context. + * @return zero on success, a negative value on error + * @see avcodec_alloc_context3, avcodec_find_decoder, avcodec_find_encoder, avcodec_close + * + * @deprecated use avcodec_open2 + *) +function avcodec_open(avctx: PAVCodecContext; codec: PAVCodec): cint; + cdecl; external av__codec; deprecated; +{$IFEND} + +(** + * 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(). + *) +function avcodec_open2(avctx: PAVCodecContext; codec: {const} PAVCodec; options: PPAVDictionary): cint; + cdecl; external av__codec; + +(** + * 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. + *) +function avcodec_close(avctx: PAVCodecContext): cint; + cdecl; external av__codec; + +(** + * Free all allocated data in the given subtitle struct. + * + * @param sub AVSubtitle to free. + *) +procedure avsubtitle_free(sub: PAVSubtitle); + cdecl; external av__codec; + +(** + * @} + *) + +(** + * @addtogroup lavc_packet + * @{ + *) + +(* + * Default packet destructor. + *) +procedure av_destruct_packet(pkt: PAVPacket); + cdecl; external av__codec; + +(* + * 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 + *) +procedure av_init_packet(var pkt: TAVPacket); + cdecl; external av__codec; + +(* + * 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 + *) +function av_new_packet(pkt: PAVPacket; size: cint): cint; + cdecl; external av__codec; + +(* + * Reduce packet size, correctly zeroing padding + * + * @param pkt packet + * @param size new size + *) +procedure av_shrink_packet(pkt: PAVPacket; size: cint); + cdecl; external av__codec; + +(** + * Increase packet size, correctly zeroing padding + * + * @param pkt packet + * @param grow_by number of bytes by which to increase the size of the packet + *) +function av_grow_packet(pkt: PAVPacket; grow_by: cint): cint; + cdecl; external av__codec; + +(* + * @warning This is a hack - the packet memory allocation stuff is broken. The + * packet is allocated if it was not really allocated. + *) +function av_dup_packet(pkt: PAVPacket): cint; + cdecl; external av__codec; + +(** + * Copy packet, including contents + * + * @return 0 on success, negative AVERROR on fail + *) +function av_copy_packet(dst: PAVPacket; src: PAVPacket): cint; + cdecl; external av__codec; + +(* + * Free a packet. + * + * @param pkt packet to free + *) +procedure av_free_packet(pkt: PAVPacket); + cdecl; external av__codec; + +(** + * 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 + *) +function av_packet_new_side_data(pkt: PAVPacket; type_: AVPacketSideDataType; + size: cint): PByte; + cdecl; external av__codec; + +(** + * 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 + *) +function av_packet_shrink_side_data(pkt: PAVPacket; type_: AVPacketSideDataType; + size: cint): cint; + cdecl; external av__codec; + +(** + * 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 + *) +function av_packet_get_side_data(pkt: PAVPacket; type_: AVPacketSideDataType; + size: Pcint): PByte; + cdecl; external av__codec; + +function av_packet_merge_side_data(pkt: PAVPacket): cint; + cdecl; external av__codec; + +function av_packet_split_side_data(pkt: PAVPacket): cint; + cdecl; external av__codec; + +/** + * @} + */ + +/** + * @addtogroup lavc_decoding + * @{ + */ + +(** + * Find a registered decoder with a matching codec ID. + * + * @param id CodecID of the requested decoder + * @return A decoder if one was found, NULL otherwise. + *) +function avcodec_find_decoder(id: TAVCodecID): PAVCodec; + cdecl; external av__codec; + +(** + * Find a registered decoder with the specified name. + * + * @param name name of the requested decoder + * @return A decoder if one was found, NULL otherwise. + *) +function avcodec_find_decoder_by_name(name: PAnsiChar): PAVCodec; + cdecl; external av__codec; + +function avcodec_default_get_buffer (s: PAVCodecContext; pic: PAVFrame): cint; + cdecl; external av__codec; +procedure avcodec_default_release_buffer (s: PAVCodecContext; pic: PAVFrame); + cdecl; external av__codec; +function avcodec_default_reget_buffer (s: PAVCodecContext; pic: PAVFrame): cint; + cdecl; external av__codec; + +(** + * 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. + *) +function avcodec_get_edge_width(): cuint; + cdecl; external av__codec; + +(** + * 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. + *) +procedure avcodec_align_dimensions(s: PAVCodecContext; width: PCint; height: PCint); + cdecl; external av__codec; + +(** + * Modifiy 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. + *) +procedure avcodec_align_dimensions2(s: PAVCodecContext; width: PCint; height: PCint; + linesize_align: PAVNDPArray); + cdecl; external av__codec; + +{$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. + *) +function avcodec_decode_audio3(avctx: PAVCodecContext; samples: PSmallint; + var frame_size_ptr: cint; + avpkt: PAVPacket): cint; + cdecl; external av__codec; deprecated; +{$IFEND} + +(** + * 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. + *) +function avcodec_decode_audio4(avctx: PAVCodecContext; frame: PAVFrame; + got_frame_ptr: Pcint; avpkt: PAVPacket): cint; + cdecl; external av__codec; + +(** + * 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. + * @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. + *) +function avcodec_decode_video2(avctx: PAVCodecContext; picture: PAVFrame; + var got_picture_ptr: cint; + avpkt: {const} PAVPacket): cint; + cdecl; external av__codec; + +(* 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. + *) +function avcodec_decode_subtitle2(avctx: PAVCodecContext; sub: PAVSubtitle; + var got_sub_ptr: cint; + avpkt: PAVPacket): cint; + cdecl; external av__codec; + +/** + * @defgroup lavc_parsing Frame parsing + * @{ + */ + +const + AV_PARSER_PTS_NB = 4; + PARSER_FLAG_COMPLETE_FRAMES = $0001; + PARSER_FLAG_ONCE = $0002; +/// Set if the parser has a valid file offset + PARSER_FLAG_FETCHED_OFFSET = $0004; + PARSER_FLAG_USE_CODEC_TS = $1000; + +type + (* frame parsing *) + PAVCodecParserContext = ^TAVCodecParserContext; + PAVCodecParser = ^TAVCodecParser; + + TAVCodecParserContext = record + priv_data: pointer; + parser: PAVCodecParser; + frame_offset: cint64; (* offset of the current frame *) + cur_offset: cint64; (* current offset (incremented by each av_parser_parse()) *) + next_frame_offset: cint64; (* offset of the next frame *) + (* video info *) + pict_type: cint; (* 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. + *) + repeat_pict: cint; (* XXX: put it back in AVCodecContext *) + pts: cint64; (* pts of the current frame *) + dts: cint64; (* dts of the current frame *) + + (* private data *) + last_pts: cint64; + last_dts: cint64; + fetch_timestamp: cint; + + cur_frame_start_index: cint; + cur_frame_offset: array [0..AV_PARSER_PTS_NB - 1] of cint64; + cur_frame_pts: array [0..AV_PARSER_PTS_NB - 1] of cint64; + cur_frame_dts: array [0..AV_PARSER_PTS_NB - 1] of cint64; + + flags: cint; + + offset: cint64; ///< byte offset from starting packet start + cur_frame_end: array [0..AV_PARSER_PTS_NB - 1] of cint64; + + (** + * 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 FF_I_TYPE picture type as key frames + * will be used. + *) + key_frame: cint; + + (** + * 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 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. + *) + convergence_duration: cint64; + + // 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. + *) + dts_sync_point: cint; + + (** + * 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. + *) + dts_ref_dts_delta: cint; + + (** + * 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. + *) + pts_dts_delta: cint; + + (** + * Position of the packet in file. + * + * Analogous to cur_frame_pts/dts + *) + cur_frame_pos: array [0..AV_PARSER_PTS_NB - 1] of cint64; + + (** + * Byte position of currently parsed frame in stream. + *) + pos: cint64; + + (** + * Previous frame byte position. + *) + last_pos: cint64; + end; {AVCodecParserContext} + + TAVCodecParser = record + codec_ids: array [0..4] of cint; (* several codec IDs are permitted *) + priv_data_size: cint; + parser_init: function(s: PAVCodecParserContext): cint; cdecl; + parser_parse: function(s: PAVCodecParserContext; + avctx: PAVCodecContext; + poutbuf: {const} PPointer; poutbuf_size: PCint; + buf: {const} PByteArray; buf_size: cint): cint; cdecl; + parser_close: procedure(s: PAVCodecParserContext); cdecl; + split: function(avctx: PAVCodecContext; buf: {const} PByteArray; + buf_size: cint): cint; cdecl; + next: PAVCodecParser; + end; {AVCodecParser} + +function av_parser_next(c: PAVCodecParser): PAVCodecParser; + cdecl; external av__codec; + +procedure av_register_codec_parser(parser: PAVCodecParser); + cdecl; external av__codec; + +function av_parser_init(codec_id: cint): PAVCodecParserContext; + cdecl; external av__codec; + +(** + * 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) do + * begin + * len := av_parser_parse2(myparser, AVCodecContext, data, size, + * in_data, in_len, + * pts, dts, pos); + * in_data := in_data + len; + * in_len := in_len - len; + * + * if (size) then + * decode_frame(data, size); + * end; + * @endcode + *) +function av_parser_parse2(s: PAVCodecParserContext; + avctx: PAVCodecContext; + poutbuf: PPointer; + poutbuf_size: PCint; + buf: {const} PByteArray; + buf_size: cint; + pts: cint64; + dts: cint64; + pos: cint64): cint; + cdecl; external av__codec; + +function av_parser_change(s: PAVCodecParserContext; + avctx: PAVCodecContext; + poutbuf: PPointer; poutbuf_size: PCint; + buf: {const} PByteArray; buf_size: cint; keyframe: cint): cint; + cdecl; external av__codec; + +procedure av_parser_close(s: PAVCodecParserContext); + cdecl; external av__codec; + +(** + * @} + * @} + *) + +(** + * @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. + *) +function avcodec_find_encoder(id: TAVCodecID): PAVCodec; + cdecl; external av__codec; + +(** + * Find a registered encoder with the specified name. + * + * @param name name of the requested encoder + * @return An encoder if one was found, NULL otherwise. + *) +function avcodec_find_encoder_by_name(name: PAnsiChar): PAVCodec; + cdecl; external av__codec; + +{$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. + *) +function avcodec_encode_audio(avctx: PAVCodecContext; buf: PByte; + buf_size: cint; samples: {const} PSmallint): cint; + cdecl; external av__codec; deprecated; +{$IFEND} + +(** + * 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. If avpkt->data and + * avpkt->size are set, avpkt->destruct must also be set. 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 + *) +function avcodec_encode_audio2(avctx: PAVCodecContext; avpkt: PAVPacket; + frame: {const} PAVFrame; got_packet_ptr: Pcint): cint; + cdecl; external av__codec; + +{$IF FF_API_OLD_ENCODE_AUDIO} +(** + * @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. + *) +function avcodec_encode_video(avctx: PAVCodecContext; buf: PByte; + buf_size: cint; pict: {const} PAVFrame): cint; + cdecl; external av__codec; deprecated; +{$IFEND} + +(** + * 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 + *) +function avcodec_encode_video2(avctx: PAVCodecContext; avpkt: PAVPacket; + frame: {const} PAVFrame; got_packet_ptr: Pcint): cint; + cdecl; external av__codec; + +function avcodec_encode_subtitle(avctx: PAVCodecContext; buf: PByteArray; + buf_size: cint; sub: {const} PAVSubtitle): cint; + cdecl; external av__codec; + +(** + * @} + *) + +(** + * @defgroup lavc_resample Audio resampling + * @ingroup libavc + * + * @{ + *) +type + PReSampleContext = pointer; + PAVResampleContext = pointer; + PImgReSampleContext = pointer; + +(** + * 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 + *) + function av_audio_resample_init(output_channels: cint; input_channels: cint; + output_rate: cint; input_rate: cint; + sample_fmt_out: TAVSampleFormat; + sample_fmt_in: TAVSampleFormat; + filter_length: cint; log2_phase_count: cint; + linear: cint; cutoff: cdouble): PReSampleContext; + cdecl; external av__codec; + +function audio_resample (s: PReSampleContext; output: PSmallint; input: PSmallint; nb_samples: cint): cint; + cdecl; external av__codec; + +(** + * Free resample context. + * + * @param s a non-NULL pointer to a resample context previously + * created with av_audio_resample_init() + *) +procedure audio_resample_close (s: PReSampleContext); + cdecl; external av__codec; + +(** + * 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 + *) +function av_resample_init (out_rate: cint; in_rate: cint; filter_length: cint; + log2_phase_count: cint; linear: cint; cutoff: cdouble): PAVResampleContext; + cdecl; external av__codec; + +(** + * 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 + *) +function av_resample (c: PAVResampleContext; dst: PSmallint; src: PSmallint; var consumed: cint; + src_size: cint; dst_size: cint; update_ctx: cint): cint; + cdecl; external av__codec; + +(** + * 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 + *) +procedure av_resample_compensate (c: PAVResampleContext; sample_delta: cint; + compensation_distance: cint); + cdecl; external av__codec; + +procedure av_resample_close (c: PAVResampleContext); + cdecl; external av__codec; + +(** + * @} + *) + +(** + * @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. + *) +function avpicture_alloc (picture: PAVPicture; pix_fmt: TAVPixelFormat; + width: cint; height: cint): cint; + cdecl; external av__codec; + +(** + * Free a picture previously allocated by avpicture_alloc(). + * + * @param picture the AVPicture to be freed + *) +procedure avpicture_free (picture: PAVPicture); + cdecl; external av__codec; + +(** + * Fill in the AVPicture fields, always assume a linesize alignment of + * 1. + * + * @see av_image_fill_arrays() + *) +function avpicture_fill (picture: PAVPicture; ptr: pcuint8; + pix_fmt: TAVPixelFormat; width: cint; height: cint): cint; + cdecl; external av__codec; + +(** + * Copy pixel data from an AVPicture into a buffer, always assume a + * linesize alignment of 1. + * + * @see av_image_copy_to_buffer() + *) +function avpicture_layout (src: {const} PAVPicture; pix_fmt: TAVPixelFormat; + width: cint; height: cint; + dest: PByteArray; dest_size: cint): cint; + cdecl; external av__codec; + +(** + * Calculate the size in bytes that a picture of the given width and height + * would occupy if stored in the given picture format. + * Always assume a linesize alignment of 1. + * + * @see av_image_get_buffer_size(). + *) +function avpicture_get_size (pix_fmt: TAVPixelFormat; width: cint; height: cint): cint; + cdecl; external av__codec; + +(** + * deinterlace - if not supported return -1 *) + *) +function avpicture_deinterlace (dst: PAVPicture; src: {const} PAVPicture; + pix_fmt: TAVPixelFormat; width: cint; height: cint): cint; + cdecl; external av__codec; + +(** + * Copy image src to dst. Wraps av_image_copy(). + *) +procedure av_picture_copy(dst: PAVPicture; src: {const} PAVPicture; + pix_fmt: TAVPixelFormat; width: cint; height: cint); + cdecl; external av__codec; + +(** + * Crop image top and left side. + *) +function av_picture_crop(dst: PAVPicture; src: {const} PAVPicture; + pix_fmt: TAVPixelFormat; top_band: cint; left_band: cint): cint; + cdecl; external av__codec; + +(** + * Pad image. + *) +function av_picture_pad(dst: PAVPicture; src: {const} PAVPicture; + height: cint; width: cint; pix_fmt: TAVPixelFormat; + padtop: cint; padbottom: cint; padleft: cint; + padright: cint; color: PCint): cint; + cdecl; external av__codec; + +(** + * @} + *) + +(** + * @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. + * @{ + *) + +procedure avcodec_get_chroma_sub_sample (pix_fmt: TAVPixelFormat; var h_shift: cint; var v_shift: cint); + cdecl; external av__codec; + +(** + * Return a value representing the fourCC code associated to the + * pixel format pix_fmt, or 0 if no associated fourCC code can be + * found. + *) +function avcodec_pix_fmt_to_codec_tag(pix_fmt: TAVPixelFormat): cuint; + cdecl; external av__codec; + +const + FF_LOSS_RESOLUTION = $0001; (**< loss due to resolution change *) + FF_LOSS_DEPTH = $0002; (**< loss due to color depth change *) + FF_LOSS_COLORSPACE = $0004; (**< loss due to color space conversion *) + FF_LOSS_ALPHA = $0008; (**< loss of alpha bits *) + FF_LOSS_COLORQUANT = $0010; (**< loss due to color quantization *) + FF_LOSS_CHROMA = $0020; (**< loss of chroma (e.g. RGB to gray conversion) *) + +(** + * Compute what kind of losses will occur when converting from one specific + * pixel format to another. + * When converting from one pixel format to another, information loss may occur. + * For example, when converting from RGB24 to GRAY, the color information will + * be lost. Similarly, other losses occur when converting from some formats to + * other formats. These losses can involve loss of chroma, but also loss of + * resolution, loss of color depth, loss due to the color space conversion, loss + * of the alpha bits or loss due to color quantization. + * avcodec_get_fix_fmt_loss() informs you about the various types of losses + * which will occur when converting from one pixel format to another. + * + * @param[in] dst_pix_fmt destination pixel format + * @param[in] src_pix_fmt source pixel format + * @param[in] has_alpha Whether the source pixel format alpha channel is used. + * @return Combination of flags informing you what kind of losses will occur + * (maximum loss for an invalid dst_pix_fmt). + *) +function avcodec_get_pix_fmt_loss (dst_pix_fmt: TAVPixelFormat; src_pix_fmt: TAVPixelFormat; + has_alpha: cint): cint; + cdecl; external av__codec; + +{$IFDEF FF_API_FIND_BEST_PIX_FMT} +(** + * @deprecated use avcodec_find_best_pix_fmt_of_2() 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. + * + * Note, only the first 64 pixel formats will fit in pix_fmt_mask. + * + * @code + * src_pix_fmt = PIX_FMT_YUV420P; + * pix_fmt_mask = (1 << PIX_FMT_YUV422P) | (1 << PIX_FMT_RGB24); + * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss); + * @endcode + * + * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from + * @param[in] src_pix_fmt source pixel format + * @param[in] has_alpha Whether the source pixel format alpha channel is used. + * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur. + * @return The best pixel format to convert to or -1 if none was found. + *) +function avcodec_find_best_pix_fmt(pix_fmt_mask: cint64; src_pix_fmt: TAVPixelFormat; + has_alpha: cint; loss_ptr: PCint): TAVPixelFormat; + cdecl; external av__codec; deprecated; +{$ENDIF} + +(** + * 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_of_2() 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 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. + *) +function avcodec_find_best_pix_fmt_of_list(pix_fmt_list: PPixelFormat; + src_pix_fmt: TPixelFormat; + has_alpha: cint; loss_ptr: Pcint): TPixelFormat; + cdecl; external av__codec; + +(** + * Find the best pixel format to convert to given a certain source pixel + * format and a selection of two destination pixel formats. 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_of_2() selects which of + * the given pixel formats should be used to suffer the least amount of loss. + * + * If one of the destination formats is PIX_FMT_NONE the other pixel format (if valid) will be + * returned. + * + * @code + * src_pix_fmt = PIX_FMT_YUV420P; + * dst_pix_fmt1= PIX_FMT_RGB24; + * dst_pix_fmt2= PIX_FMT_GRAY8; + * dst_pix_fmt3= PIX_FMT_RGB8; + * loss= FF_LOSS_CHROMA; // don't care about chroma loss, so chroma loss will be ignored. + * dst_pix_fmt = avcodec_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, alpha, &loss); + * dst_pix_fmt = avcodec_find_best_pix_fmt_of_2(dst_pix_fmt, dst_pix_fmt3, src_pix_fmt, alpha, &loss); + * @endcode + * + * @param[in] dst_pix_fmt1 One of the two destination pixel formats to choose from + * @param[in] dst_pix_fmt2 The other of the two destination 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[in, out] loss_ptr Combination of loss flags. In: selects which of the losses to ignore, i.e. + * NULL or value of zero means we care about all losses. Out: the loss + * that occurs when converting from src to selected dst pixel format. + * @return The best pixel format to convert to or -1 if none was found. + *) +function avcodec_find_best_pix_fmt_of_2(dst_pix_fmt1: TAVPixelFormat; dst_pix_fmt2: TAVPixelFormat; + src_pix_fmt: TAVPixelFormat; has_alpha: cint; loss_ptr: Pcint)): TAVPixelFormat; + cdecl; external av__codec; + +{$IFDEF AV_HAVE_INCOMPATIBLE_FORK_ABI} +function avcodec_find_best_pix_fmt2(pix_fmt_list: PAVPixelFormat; + src_pix_fmt: TAVPixelFormat; + has_alpha: cint; loss_ptr: Pcint): TAVPixelFormat; + cdecl; external av__codec; deprecated; +{$ELSE} +function avcodec_find_best_pix_fmt2(dst_pix_fmt1: TAVPixelFormat; dst_pix_fmt2: TAVPixelFormat; + src_pix_fmt: TAVPixelFormat; has_alpha: cint; loss_ptr: Pcint): TAVPixelFormat; + cdecl; external av__codec; deprecated; +{$ENDIF} + +function avcodec_default_get_format(s: PAVCodecContext; fmt: {const} PAVPixelFormat): TAVPixelFormat; + cdecl; external av__codec; + +(** + * @} + *) + +procedure avcodec_set_dimensions(s: PAVCodecContext; width: cint; height: cint); + cdecl; external av__codec; + + * 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 + *) +function av_get_codec_tag_string(buf: PAnsiChar; buf_size: size_t; codec_tag: cuint): size_t; + cdecl; external av__codec; + +procedure avcodec_string(buf: PAnsiChar; buf_size: cint; enc: PAVCodecContext; encode: cint); + cdecl; external av__codec; + +(** + * 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. + *) +function av_get_profile_name(codec: {const} PAVCodec; profile: cint): {const} PAnsiChar; + cdecl; external av__codec; + +function avcodec_default_execute(s: PAVCodecContext; func: TExecuteFunc; arg: Pointer; var ret: cint; count: cint; size: cint): cint; + cdecl; external av__codec; + +function avcodec_default_execute2(s: PAVCodecContext; func: TExecuteFunc; arg: Pointer; var ret: cint; count: cint): cint; + cdecl; external av__codec; +//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 + * @return 0 on success, negative error code on failure + *) +function avcodec_fill_audio_frame(frame: PAVFrame; nb_channels: cint; + sample_fmt: TAVSampleFormat; buf: {const} PByte; + buf_size: cint; align: cint): cint; + cdecl; external av__codec; + +(** + * Flush buffers, should be called when seeking or when switching to a different stream. + *) +procedure avcodec_flush_buffers(avctx: PAVCodecContext); + cdecl; external av__codec; + +procedure avcodec_default_free_buffers(s: PAVCodecContext); + cdecl; external av__codec; + +(** + * 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. + *) +function av_get_bits_per_sample(codec_id: TAVCodecID): cint; + cdecl; external av__codec; + +(** + * Return the PCM codec associated with a sample format. + * @param be endianness, 0 for little, 1 for big, + * -1 (or anything else) for native + * @return AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE + *) +function av_get_pcm_codec(fmt: TAVSampleFormat; be: cint): TAVCodecID; + cdecl; external av__codec; + +(** + * 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. + *) +function av_get_exact_bits_per_sample(codec_id: TAVCodecID): cint; + cdecl; external av__codec; + +(** + * 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. + *) +function av_get_audio_frame_duration(avctx: PAVCodecContext, frame_bytes: cint): cint; + cdecl; external av__codec; + +type + PAVBitStreamFilterContext = ^TAVBitStreamFilterContext; + PAVBitStreamFilter = ^TAVBitStreamFilter; + + TAVBitStreamFilterContext = record + priv_data: pointer; + filter: PAVBitStreamFilter; + parser: PAVCodecParserContext; + next: PAVBitStreamFilterContext; + end; + + TAVBitStreamFilter = record + name: PAnsiChar; + priv_data_size: cint; + filter: function(bsfc: PAVBitStreamFilterContext; + avctx: PAVCodecContext; args: {const} PAnsiChar; + poutbuf: PPointer; poutbuf_size: PCint; + buf: {const} PByte; buf_size: cint; keyframe: cint): cint; cdecl; + close: procedure(bsfc: PAVBitStreamFilterContext); + next: PAVBitStreamFilter; + end; + +procedure av_register_bitstream_filter(bsf: PAVBitStreamFilter); + cdecl; external av__codec; + +function av_bitstream_filter_init(name: {const} PAnsiChar): PAVBitStreamFilterContext; + cdecl; external av__codec; + +function av_bitstream_filter_filter(bsfc: PAVBitStreamFilterContext; + avctx: PAVCodecContext; args: {const} PAnsiChar; + poutbuf: PPointer; poutbuf_size: PCint; + buf: {const} PByte; buf_size: cint; keyframe: cint): cint; + cdecl; external av__codec; + +procedure av_bitstream_filter_close(bsf: PAVBitStreamFilterContext); + cdecl; external av__codec; + +function av_bitstream_filter_next(f: PAVBitStreamFilter): PAVBitStreamFilter; + cdecl; external av__codec; + +(* memory *) + +(** + * Reallocate the given block if it is not large enough, otherwise do nothing. + * + * @see av_realloc + *) +procedure av_fast_realloc(ptr: pointer; size: PCuint; min_size: size_t); + cdecl; external av__codec; + +(** + * 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. + *) +procedure av_fast_malloc(ptr: pointer; size: PCuint; min_size: size_t); + cdecl; external av__codec; + +(** + * Same behaviour av_fast_malloc but the buffer has additional + * FF_INPUT_PADDING_SIZE at the end which will will always be 0. + * + * In addition the whole buffer will initially and after resizes + * be 0-initialized so that no uninitialized data will ever appear. + *) +procedure av_fast_padded_malloc(ptr: pointer; size: Pcuint; min_size: size_t); + cdecl; external av__codec; + +(** + * Same behaviour av_fast_padded_malloc except that buffer will always + * be 0-initialized after call. + *) +procedure av_fast_padded_mallocz(ptr: pointer; size: Pcuint; min_size: size_t); + cdecl; external av__codec; + +(** + * 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. + *) +function av_xiphlacing(s: PByte; v: cuint): cuint; + cdecl; external av__codec; + +(** + * Log a generic warning message about a missing feature. This function is + * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) + * only, and would normally not be used by applications. + * @param[in] avc a pointer to an arbitrary struct of which the first field is + * a pointer to an AVClass struct + * @param[in] feature string containing the name of the missing feature + * @param[in] want_sample indicates if samples are wanted which exhibit this feature. + * If want_sample is non-zero, additional verbage will be added to the log + * message which tells the user how to report samples to the development + * mailing list. + *) +procedure av_log_missing_feature(avc: Pointer; feature: {const} PAnsiChar; want_sample: cint); + cdecl; external av__codec; + +(** + * Log a generic warning message asking for a sample. This function is + * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) + * only, and would normally not be used by applications. + * @param[in] avc a pointer to an arbitrary struct of which the first field is + * a pointer to an AVClass struct + * @param[in] msg string containing an optional message, or NULL if no message + *) +procedure av_log_ask_for_sample(avc: Pointer; msg: {const} PAnsiChar); {todo: av_printf_format(2, 3);} + cdecl; external av__codec; + +(** + * Register the hardware accelerator hwaccel. + *) +procedure av_register_hwaccel (hwaccel: PAVHWAccel) + cdecl; external av__codec; + +(** + * 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. + *) +function av_hwaccel_next (hwaccel: PAVHWAccel): PAVHWAccel; + cdecl; external av__codec; + +(** + * Lock operation used by lockmgr + *) +type + TAVLockOp = ( + AV_LOCK_CREATE, ///< Create a mutex + AV_LOCK_OBTAIN, ///< Lock the mutex + AV_LOCK_RELEASE, ///< Unlock the mutex + AV_LOCK_DESTROY ///< Free mutex resources + ); + +(** + * Register a user provided lock manager supporting the operations + * specified by AVLockOp. mutex points to a (void) where the + * lockmgr should store/get a pointer to a user allocated mutex. It's + * NULL upon AV_LOCK_CREATE and != NULL for all other ops. + * + * @param cb User defined callback. Note: FFmpeg may invoke calls to this + * callback during the call to av_lockmgr_register(). + * Thus, the application must be prepared to handle that. + * If cb is set to NULL the lockmgr will be unregistered. + * Also note that during unregistration the previously registered + * lockmgr callback may also be invoked. + *) +// ToDo: Implement and test this +//function av_lockmgr_register(cb: function (mutex: Ppointer; op: TAVLockOp)): cint; +// cdecl; external av__codec; + +(** + * Get the type of the given codec. + *) +function avcodec_get_type(codec_id: TAVCodecID): TAVMediaType; + cdecl; external av__codec; + +(** + * Get the name of a codec. + * @return a static string identifying the codec; never NULL + *) +function avcodec_get_name(id: TAVCodecID): PAnsiChar; + cdecl; external av__codec; + +(** + * @return a positive value if s is open (i.e. avcodec_open2() was called on it + * with no corresponding avcodec_close()), 0 otherwise. + *) +function avcodec_is_open(s: PAVCodecContext): cint; + cdecl; external av__codec; + +(** + * @return a non-zero number if codec is an encoder, zero otherwise + *) +function av_codec_is_encoder(codec: {const} PAVCodec): cint; + cdecl; external av__codec; + +(** + * @return a non-zero number if codec is a decoder, zero otherwise + *) +function av_codec_is_decoder(codec: {const} PAVCodec): cint; + cdecl; external av__codec; + +(** + * @return descriptor for given codec ID or NULL if no descriptor exists. + *) +function avcodec_descriptor_get(id: TAVCodecID): PAVCodecDescriptor; + cdecl; external av__codec; + +(** + * 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 + *) +function avcodec_descriptor_next(prev: {const} PAVCodecDescriptor): PAVCodecDescriptor; + cdecl; external av__codec; + +(** + * @return codec descriptor with the given name or NULL if no such descriptor + * exists. + *) +function avcodec_descriptor_get_by_name(name: {const} PAnsiChar): PAVCodecDescriptor; + cdecl; external av__codec; + +(** + * @} + *) + +implementation + +end. |