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Delphi-OpenCV/include/ffmpeg/libavcodec/libavcodec.avcodec.pas
Laentir Valetov cb996b2a4d Some refactoring 
Signed-off-by: Laentir Valetov <laex@bk.ru>
2014-04-01 22:39:44 +04:00

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(*
* copyright (c) 2001 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
*)
unit libavcodec.avcodec;
{$include ffmpeg.inc}
interface
uses
ctypes, buffer, frame, log, rational, avutil, pixfmt, samplefmt, dict;
(*
* @defgroup lavc_core Core functions/structures.
* @ingroup libavc
*
* Basic definitions, functions for querying libavcodec capabilities,
* allocating core structures, etc.
* @{
*)
(*
* Identify the syntax and semantics of the bitstream.
* The principle is roughly:
* Two decoders with the same ID can decode the same streams.
* Two encoders with the same ID can encode compatible streams.
* There may be slight deviations from the principle due to implementation
* details.
*
* If you add a codec ID to this list, add it so that
* 1. no value of a existing codec ID changes (that would break ABI),
* 2. Give it a value which when taken as ASCII is recognized uniquely by a human as this specific codec.
* This ensures that 2 forks can independently add AVCodecIDs without producing conflicts.
*
* After adding new codec IDs, do not forget to add an entry to the codec
* descriptor list and bump libavcodec minor version.
*)
Const
FF_COMPRESSION_DEFAULT = -1;
{$IFDEF FF_API_ASPECT_EXTENDED}
FF_ASPECT_EXTENDED = 15;
{$ENDIF}
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 = $0004;
/// < allow draw_horiz_band() with 1 component at a time (SVQ1)
FF_MB_DECISION_SIMPLE = 0;
/// < uses mb_cmp
FF_MB_DECISION_BITS = 1;
/// < chooses the one which needs the fewest bits
FF_MB_DECISION_RD = 2;
/// < rate distortion
FF_CODER_TYPE_VLC = 0;
FF_CODER_TYPE_AC = 1;
FF_CODER_TYPE_RAW = 2;
FF_CODER_TYPE_RLE = 3;
FF_CODER_TYPE_DEFLATE = 4;
FF_BUG_AUTODETECT = 1;
/// < autodetection
{$IFDEF FF_API_OLD_MSMPEG4}
FF_BUG_OLD_MSMPEG4 = 2;
{$ENDIF}
FF_BUG_XVID_ILACE = 4;
FF_BUG_UMP4 = 8;
FF_BUG_NO_PADDING = 16;
FF_BUG_AMV = 32;
{$IFDEF FF_API_AC_VLC}
F_BUG_AC_VLC = 0;
/// < Will be removed, libavcodec can now handle these non-compliant files by default.
{$ENDIF}
FF_BUG_QPEL_CHROMA = 64;
FF_BUG_STD_QPEL = 128;
FF_BUG_QPEL_CHROMA2 = 256;
FF_BUG_DIRECT_BLOCKSIZE = 512;
FF_BUG_EDGE = 1024;
FF_BUG_HPEL_CHROMA = 2048;
FF_BUG_DC_CLIP = 4096;
FF_BUG_MS = 8192;
/// < Work around various bugs in Microsoft's broken decoders.
FF_BUG_TRUNCATED = 16384;
FF_COMPLIANCE_VERY_STRICT = 2;
/// < Strictly conform to an older more strict version of the spec or reference software.
FF_COMPLIANCE_STRICT = 1;
/// < Strictly conform to all the things in the spec no matter what consequences.
FF_COMPLIANCE_NORMAL = 0;
FF_COMPLIANCE_UNOFFICIAL = -1;
/// < Allow unofficial extensions
FF_COMPLIANCE_EXPERIMENTAL = -2;
/// < Allow nonstandardized experimental things.
FF_EC_GUESS_MVS = 1;
FF_EC_DEBLOCK = 2;
FF_DEBUG_PICT_INFO = 1;
FF_DEBUG_RC = 2;
FF_DEBUG_BITSTREAM = 4;
FF_DEBUG_MB_TYPE = 8;
FF_DEBUG_QP = 16;
{$IFDEF FF_API_DEBUG_MV}
(*
* @deprecated this option does nothing
*)
FF_DEBUG_MV = 32;
{$ENDIF}
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 = $00001000;
{$IFDEF FF_API_DEBUG_MV}
FF_DEBUG_VIS_QP = $00002000;
/// < only access through AVOptions from outside libavcodec
FF_DEBUG_VIS_MB_TYPE = $00004000;
/// < only access through AVOptions from outside libavcodec
{$ENDIF}
FF_DEBUG_BUFFERS = $00008000;
FF_DEBUG_THREADS = $00010000;
{$IFDEF FF_API_DEBUG_MV}
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 = $00000004; // visualize backward predicted MVs of B frames
{$ENDIF}
AV_EF_CRCCHECK = (1 shl 0);
AV_EF_BITSTREAM = (1 shl 1);
/// < detect bitstream specification deviations
AV_EF_BUFFER = (1 shl 2);
/// < detect improper bitstream length
AV_EF_EXPLODE = (1 shl 3);
/// < abort decoding on minor error detection
AV_EF_CAREFUL = (1 shl 16);
/// < consider things that violate the spec, are fast to calculate and have not been seen in the wild as errors
AV_EF_COMPLIANT = (1 shl 17);
/// < consider all spec non compliancies as errors
AV_EF_AGGRESSIVE = (1 shl 18);
/// < consider things that a sane encoder should not do as an error
FF_DCT_AUTO = 0;
FF_DCT_FASTINT = 1;
FF_DCT_INT = 2;
FF_DCT_MMX = 3;
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_ARM = 7;
FF_IDCT_ALTIVEC = 8;
FF_IDCT_SH4 = 9;
FF_IDCT_SIMPLEARM = 10;
FF_IDCT_IPP = 13;
FF_IDCT_XVIDMMX = 14;
FF_IDCT_SIMPLEARMV5TE = 16;
FF_IDCT_SIMPLEARMV6 = 17;
FF_IDCT_SIMPLEVIS = 18;
FF_IDCT_FAAN = 20;
FF_IDCT_SIMPLENEON = 22;
{$IFDEF FF_API_ARCH_ALPHA}
FF_IDCT_SIMPLEALPHA = 23;
{$ENDIF}
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_MPEG2_AAC_LOW = 128;
FF_PROFILE_MPEG2_AAC_HE = 131;
//
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_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 = 0;
FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 = 1;
FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION = 2;
FF_PROFILE_JPEG2000_DCINEMA_2K = 3;
FF_PROFILE_JPEG2000_DCINEMA_4K = 4;
FF_LEVEL_UNKNOWN = -99;
FF_SUB_CHARENC_MODE_DO_NOTHING = -1;
/// < do nothing (demuxer outputs a stream supposed to be already in UTF-8, or the codec is bitmap for instance)
FF_SUB_CHARENC_MODE_AUTOMATIC = 0;
/// < libavcodec will select the mode itself
FF_SUB_CHARENC_MODE_PRE_DECODER = 1;
/// < the AVPacket data needs to be recoded to UTF-8 before being fed to the decoder, requires iconv
{$IFNDEF FF_API_DEBUG_MV}
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 = $00000004; // visualize backward predicted MVs of B frames
{$ENDIF}
//
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 = $1000;
Type
TAVCodecID = ( //
AV_CODEC_ID_NONE, //
(* video codecs *)
AV_CODEC_ID_MPEG1VIDEO, //
AV_CODEC_ID_MPEG2VIDEO, //
/// < preferred ID for MPEG-1/2 video decoding
{$IFDEF FF_API_XVMC}
AV_CODEC_ID_MPEG2VIDEO_XVMC, //
{$ENDIF}// FF_API_XVMC *)
AV_CODEC_ID_H261, //
AV_CODEC_ID_H263, //
AV_CODEC_ID_RV10, //
AV_CODEC_ID_RV20, //
AV_CODEC_ID_MJPEG, //
AV_CODEC_ID_MJPEGB, //
AV_CODEC_ID_LJPEG, //
AV_CODEC_ID_SP5X, //
AV_CODEC_ID_JPEGLS, //
AV_CODEC_ID_MPEG4, //
AV_CODEC_ID_RAWVIDEO, //
AV_CODEC_ID_MSMPEG4V1, //
AV_CODEC_ID_MSMPEG4V2, //
AV_CODEC_ID_MSMPEG4V3, //
AV_CODEC_ID_WMV1, //
AV_CODEC_ID_WMV2, //
AV_CODEC_ID_H263P, //
AV_CODEC_ID_H263I, //
AV_CODEC_ID_FLV1, //
AV_CODEC_ID_SVQ1, //
AV_CODEC_ID_SVQ3, //
AV_CODEC_ID_DVVIDEO, //
AV_CODEC_ID_HUFFYUV, //
AV_CODEC_ID_CYUV, //
AV_CODEC_ID_H264, //
AV_CODEC_ID_INDEO3, //
AV_CODEC_ID_VP3, //
AV_CODEC_ID_THEORA, //
AV_CODEC_ID_ASV1, //
AV_CODEC_ID_ASV2, //
AV_CODEC_ID_FFV1, //
AV_CODEC_ID_4XM, //
AV_CODEC_ID_VCR1, //
AV_CODEC_ID_CLJR, //
AV_CODEC_ID_MDEC, //
AV_CODEC_ID_ROQ, //
AV_CODEC_ID_INTERPLAY_VIDEO, //
AV_CODEC_ID_XAN_WC3, //
AV_CODEC_ID_XAN_WC4, //
AV_CODEC_ID_RPZA, //
AV_CODEC_ID_CINEPAK, //
AV_CODEC_ID_WS_VQA, //
AV_CODEC_ID_MSRLE, //
AV_CODEC_ID_MSVIDEO1, //
AV_CODEC_ID_IDCIN, //
AV_CODEC_ID_8BPS, //
AV_CODEC_ID_SMC, //
AV_CODEC_ID_FLIC, //
AV_CODEC_ID_TRUEMOTION1, //
AV_CODEC_ID_VMDVIDEO, //
AV_CODEC_ID_MSZH, //
AV_CODEC_ID_ZLIB, //
AV_CODEC_ID_QTRLE, //
AV_CODEC_ID_TSCC, //
AV_CODEC_ID_ULTI, //
AV_CODEC_ID_QDRAW, //
AV_CODEC_ID_VIXL, //
AV_CODEC_ID_QPEG, //
AV_CODEC_ID_PNG, //
AV_CODEC_ID_PPM, //
AV_CODEC_ID_PBM, //
AV_CODEC_ID_PGM, //
AV_CODEC_ID_PGMYUV, //
AV_CODEC_ID_PAM, //
AV_CODEC_ID_FFVHUFF, //
AV_CODEC_ID_RV30, //
AV_CODEC_ID_RV40, //
AV_CODEC_ID_VC1, //
AV_CODEC_ID_WMV3, //
AV_CODEC_ID_LOCO, //
AV_CODEC_ID_WNV1, //
AV_CODEC_ID_AASC, //
AV_CODEC_ID_INDEO2, //
AV_CODEC_ID_FRAPS, //
AV_CODEC_ID_TRUEMOTION2, //
AV_CODEC_ID_BMP, //
AV_CODEC_ID_CSCD, //
AV_CODEC_ID_MMVIDEO, //
AV_CODEC_ID_ZMBV, //
AV_CODEC_ID_AVS, //
AV_CODEC_ID_SMACKVIDEO, //
AV_CODEC_ID_NUV, //
AV_CODEC_ID_KMVC, //
AV_CODEC_ID_FLASHSV, //
AV_CODEC_ID_CAVS, //
AV_CODEC_ID_JPEG2000, //
AV_CODEC_ID_VMNC, //
AV_CODEC_ID_VP5, //
AV_CODEC_ID_VP6, //
AV_CODEC_ID_VP6F, //
AV_CODEC_ID_TARGA, //
AV_CODEC_ID_DSICINVIDEO, //
AV_CODEC_ID_TIERTEXSEQVIDEO, //
AV_CODEC_ID_TIFF, //
AV_CODEC_ID_GIF, //
AV_CODEC_ID_DXA, //
AV_CODEC_ID_DNXHD, //
AV_CODEC_ID_THP, //
AV_CODEC_ID_SGI, //
AV_CODEC_ID_C93, //
AV_CODEC_ID_BETHSOFTVID, //
AV_CODEC_ID_PTX, //
AV_CODEC_ID_TXD, //
AV_CODEC_ID_VP6A, //
AV_CODEC_ID_AMV, //
AV_CODEC_ID_VB, //
AV_CODEC_ID_PCX, //
AV_CODEC_ID_SUNRAST, //
AV_CODEC_ID_INDEO4, //
AV_CODEC_ID_INDEO5, //
AV_CODEC_ID_MIMIC, //
AV_CODEC_ID_RL2, //
AV_CODEC_ID_ESCAPE124, //
AV_CODEC_ID_DIRAC, //
AV_CODEC_ID_BFI, //
AV_CODEC_ID_CMV, //
AV_CODEC_ID_MOTIONPIXELS, //
AV_CODEC_ID_TGV, //
AV_CODEC_ID_TGQ, //
AV_CODEC_ID_TQI, //
AV_CODEC_ID_AURA, //
AV_CODEC_ID_AURA2, //
AV_CODEC_ID_V210X, //
AV_CODEC_ID_TMV, //
AV_CODEC_ID_V210, //
AV_CODEC_ID_DPX, //
AV_CODEC_ID_MAD, //
AV_CODEC_ID_FRWU, //
AV_CODEC_ID_FLASHSV2, //
AV_CODEC_ID_CDGRAPHICS, //
AV_CODEC_ID_R210, //
AV_CODEC_ID_ANM, //
AV_CODEC_ID_BINKVIDEO, //
AV_CODEC_ID_IFF_ILBM, //
AV_CODEC_ID_IFF_BYTERUN1, //
AV_CODEC_ID_KGV1, //
AV_CODEC_ID_YOP, //
AV_CODEC_ID_VP8, //
AV_CODEC_ID_PICTOR, //
AV_CODEC_ID_ANSI, //
AV_CODEC_ID_A64_MULTI, //
AV_CODEC_ID_A64_MULTI5, //
AV_CODEC_ID_R10K, //
AV_CODEC_ID_MXPEG, //
AV_CODEC_ID_LAGARITH, //
AV_CODEC_ID_PRORES, //
AV_CODEC_ID_JV, //
AV_CODEC_ID_DFA, //
AV_CODEC_ID_WMV3IMAGE, //
AV_CODEC_ID_VC1IMAGE, //
AV_CODEC_ID_UTVIDEO, //
AV_CODEC_ID_BMV_VIDEO, //
AV_CODEC_ID_VBLE, //
AV_CODEC_ID_DXTORY, //
AV_CODEC_ID_V410, //
AV_CODEC_ID_XWD, //
AV_CODEC_ID_CDXL, //
AV_CODEC_ID_XBM, //
AV_CODEC_ID_ZEROCODEC, //
AV_CODEC_ID_MSS1, //
AV_CODEC_ID_MSA1, //
AV_CODEC_ID_TSCC2, //
AV_CODEC_ID_MTS2, //
AV_CODEC_ID_CLLC, //
AV_CODEC_ID_MSS2, //
AV_CODEC_ID_VP9, //
AV_CODEC_ID_AIC, //
AV_CODEC_ID_ESCAPE130_DEPRECATED, //
AV_CODEC_ID_G2M_DEPRECATED, //
AV_CODEC_ID_WEBP_DEPRECATED, //
AV_CODEC_ID_HNM4_VIDEO, //
AV_CODEC_ID_HEVC_DEPRECATED, //
//
// AV_CODEC_ID_BRENDER_PIX = $42504958, // MKBETAG('B','P','I','X'),
// AV_CODEC_ID_Y41P = $59343150, // MKBETAG('Y','4','1','P'),
// AV_CODEC_ID_ESCAPE130 = $45313330, // MKBETAG('E','1','3','0'),
// AV_CODEC_ID_EXR = $30455852, // MKBETAG('0','E','X','R'),
// AV_CODEC_ID_AVRP = $41565250, // MKBETAG('A','V','R','P'),
// //
// AV_CODEC_ID_012V = $30313256, // MKBETAG('0','1','2','V'),
// AV_CODEC_ID_G2M = $3047324D, // MKBETAG( 0 ,'G','2','M'),
// AV_CODEC_ID_AVUI = $41565549, // MKBETAG('A','V','U','I'),
// AV_CODEC_ID_AYUV = $41595556, // MKBETAG('A','Y','U','V'),
// AV_CODEC_ID_TARGA_Y216 = $54323136, // MKBETAG('T','2','1','6'),
// AV_CODEC_ID_V308 = $56333038, // MKBETAG('V','3','0','8'),
// AV_CODEC_ID_V408 = $56343038, // MKBETAG('V','4','0','8'),
// AV_CODEC_ID_YUV4 = $59555634, // MKBETAG('Y','U','V','4'),
// AV_CODEC_ID_SANM = $53414E4D, // MKBETAG('S','A','N','M'),
// AV_CODEC_ID_PAF_VIDEO = $50414656, // MKBETAG('P','A','F','V'),
// AV_CODEC_ID_AVRN = $4156526E, // MKBETAG('A','V','R','n'),
// AV_CODEC_ID_CPIA = $43504941, // MKBETAG('C','P','I','A'),
// AV_CODEC_ID_XFACE = $58464143, // MKBETAG('X','F','A','C'),
// AV_CODEC_ID_SGIRLE = $53474952, // MKBETAG('S','G','I','R'),
// AV_CODEC_ID_MVC1 = $4D564331, // MKBETAG('M','V','C','1'),
// AV_CODEC_ID_MVC2 = $4D564332, // MKBETAG('M','V','C','2'),
// AV_CODEC_ID_SNOW = $534E4F57, // MKBETAG('S','N','O','W'),
// AV_CODEC_ID_WEBP = $57454250, // MKBETAG('W','E','B','P'),
// AV_CODEC_ID_SMVJPEG = $534D564A, // MKBETAG('S','M','V','J'),
// AV_CODEC_ID_HEVC = $48323635, // MKBETAG('H','2','6','5'),
// * various PCM "codecs" *)
// AV_CODEC_ID_FIRST_AUDIO = $10000, // < 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, //
AV_CODEC_ID_PCM_S24LE_PLANAR_DEPRECATED, //
AV_CODEC_ID_PCM_S32LE_PLANAR_DEPRECATED, //
// AV_CODEC_ID_PCM_S24LE_PLANAR = $18505350, // MKBETAG(24,'P','S','P'),
// AV_CODEC_ID_PCM_S32LE_PLANAR = $20505350, // MKBETAG(32,'P','S','P'),
// AV_CODEC_ID_PCM_S16BE_PLANAR = $50535010, // MKBETAG('P','S','P',16),
// * 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, //
// AV_CODEC_ID_VIMA = $56494D41, // MKBETAG('V','I','M','A'),
// AV_CODEC_ID_ADPCM_AFC = $41464320, // MKBETAG('A','F','C',' '),
// AV_CODEC_ID_ADPCM_IMA_OKI = $4F4B4920, // MKBETAG('O','K','I',' '),
// AV_CODEC_ID_ADPCM_DTK = $44544B20, // MKBETAG('D','T','K',' '),
// AV_CODEC_ID_ADPCM_IMA_RAD = $52414420, // MKBETAG('R','A','D',' '),
// AV_CODEC_ID_ADPCM_G726LE = $36323736, // MKBETAG('6','2','7','G'),
//
// * 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 = $15000, //
AV_CODEC_ID_MP3,
/// < preferred ID for decoding MPEG audio layer 1, 2 or 3
AV_CODEC_ID_AAC, //
AV_CODEC_ID_AC3, //
AV_CODEC_ID_DTS, //
AV_CODEC_ID_VORBIS, //
AV_CODEC_ID_DVAUDIO, //
AV_CODEC_ID_WMAV1, //
AV_CODEC_ID_WMAV2, //
AV_CODEC_ID_MACE3, //
AV_CODEC_ID_MACE6, //
AV_CODEC_ID_VMDAUDIO, //
AV_CODEC_ID_FLAC, //
AV_CODEC_ID_MP3ADU, //
AV_CODEC_ID_MP3ON4, //
AV_CODEC_ID_SHORTEN, //
AV_CODEC_ID_ALAC, //
AV_CODEC_ID_WESTWOOD_SND1, //
AV_CODEC_ID_GSM,
/// < as in Berlin toast format
AV_CODEC_ID_QDM2, //
AV_CODEC_ID_COOK, //
AV_CODEC_ID_TRUESPEECH, //
AV_CODEC_ID_TTA, //
AV_CODEC_ID_SMACKAUDIO, //
AV_CODEC_ID_QCELP, //
AV_CODEC_ID_WAVPACK, //
AV_CODEC_ID_DSICINAUDIO, //
AV_CODEC_ID_IMC, //
AV_CODEC_ID_MUSEPACK7, //
AV_CODEC_ID_MLP, //
AV_CODEC_ID_GSM_MS, // * as found in WAV * / //
AV_CODEC_ID_ATRAC3, //
{$IFDEF FF_API_VOXWARE}
AV_CODEC_ID_VOXWARE, //
{$ENDIF}
AV_CODEC_ID_APE, //
AV_CODEC_ID_NELLYMOSER, //
AV_CODEC_ID_MUSEPACK8, //
AV_CODEC_ID_SPEEX, //
AV_CODEC_ID_WMAVOICE, //
AV_CODEC_ID_WMAPRO, //
AV_CODEC_ID_WMALOSSLESS, //
AV_CODEC_ID_ATRAC3P, //
AV_CODEC_ID_EAC3, //
AV_CODEC_ID_SIPR, //
AV_CODEC_ID_MP1, //
AV_CODEC_ID_TWINVQ, //
AV_CODEC_ID_TRUEHD, //
AV_CODEC_ID_MP4ALS, //
AV_CODEC_ID_ATRAC1, //
AV_CODEC_ID_BINKAUDIO_RDFT, //
AV_CODEC_ID_BINKAUDIO_DCT, //
AV_CODEC_ID_AAC_LATM, //
AV_CODEC_ID_QDMC, //
AV_CODEC_ID_CELT, //
AV_CODEC_ID_G723_1, //
AV_CODEC_ID_G729, //
AV_CODEC_ID_8SVX_EXP, //
AV_CODEC_ID_8SVX_FIB, //
AV_CODEC_ID_BMV_AUDIO, //
AV_CODEC_ID_RALF, //
AV_CODEC_ID_IAC, //
AV_CODEC_ID_ILBC, //
AV_CODEC_ID_OPUS_DEPRECATED, //
AV_CODEC_ID_COMFORT_NOISE, //
AV_CODEC_ID_TAK_DEPRECATED, //
AV_CODEC_ID_METASOUND, //
// AV_CODEC_ID_FFWAVESYNTH = $46465753, // MKBETAG('F','F','W','S'),
// AV_CODEC_ID_SONIC = $534F4E43, // MKBETAG('S','O','N','C'),
// AV_CODEC_ID_SONIC_LS = $534F4E4C, // MKBETAG('S','O','N','L'),
// AV_CODEC_ID_PAF_AUDIO = $50414641, // MKBETAG('P','A','F','A'),
// AV_CODEC_ID_OPUS = $4F505553, // MKBETAG('O','P','U','S'),
// AV_CODEC_ID_TAK = $7442614B, // MKBETAG('t','B','a','K'),
// AV_CODEC_ID_EVRC = $73657663, // MKBETAG('s','e','v','c'),
// AV_CODEC_ID_SMV = $73736D76, // MKBETAG('s','s','m','v'),
// * subtitle codecs *)
// AV_CODEC_ID_FIRST_SUBTITLE = $17000, // < 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, //
// AV_CODEC_ID_MICRODVD = $6D445644, // MKBETAG('m','D','V','D'),
// AV_CODEC_ID_EIA_608 = $63363038, // MKBETAG('c','6','0','8'),
// AV_CODEC_ID_JACOSUB = $4A535542, // MKBETAG('J','S','U','B'),
// AV_CODEC_ID_SAMI = $53414D49, // MKBETAG('S','A','M','I'),
// AV_CODEC_ID_REALTEXT = $52545854, // MKBETAG('R','T','X','T'),
// AV_CODEC_ID_SUBVIEWER1 = $53625631, // MKBETAG('S','b','V','1'),
// AV_CODEC_ID_SUBVIEWER = $53756256, // MKBETAG('S','u','b','V'),
// AV_CODEC_ID_SUBRIP = $53526970, // MKBETAG('S','R','i','p'),
// AV_CODEC_ID_WEBVTT = $57565454, // MKBETAG('W','V','T','T'),
// AV_CODEC_ID_MPL2 = $4D504C32, // MKBETAG('M','P','L','2'),
// AV_CODEC_ID_VPLAYER = $56506C72, // MKBETAG('V','P','l','r'),
// AV_CODEC_ID_PJS = $50684A53, // MKBETAG('P','h','J','S'),
// AV_CODEC_ID_ASS = $41535320, // MKBETAG('A','S','S',' '), //< ASS as defined in Matroska
// * other specific kind of codecs (generally used for attachments) *)
// AV_CODEC_ID_FIRST_UNKNOWN = $18000, // < A dummy ID pointing at the start of various fake codecs.
AV_CODEC_ID_TTF = $18000, //
// AV_CODEC_ID_BINTEXT = $42545854, // MKBETAG('B','T','X','T'),
// AV_CODEC_ID_XBIN = $5842494E, // MKBETAG('X','B','I','N'),
// AV_CODEC_ID_IDF = $30494446, // MKBETAG( 0 ,'I','D','F'),
// AV_CODEC_ID_OTF = $304F5446, // MKBETAG( 0 ,'O','T','F'),
// AV_CODEC_ID_SMPTE_KLV = $4B4C5641, // MKBETAG('K','L','V','A'),
// AV_CODEC_ID_DVD_NAV = $444E4156, // MKBETAG('D','N','A','V'),
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.
// -------------------------------------
AV_CODEC_ID_PCM_S24LE_PLANAR = $18505350, // MKBETAG(24,'P','S','P'),
AV_CODEC_ID_PCM_S32LE_PLANAR = $20505350, // MKBETAG(32,'P','S','P'),
AV_CODEC_ID_012V = $30313256, // MKBETAG('0','1','2','V'),
AV_CODEC_ID_EXR = $30455852, // MKBETAG('0','E','X','R'),
AV_CODEC_ID_G2M = $3047324D, // MKBETAG( 0 ,'G','2','M'),
AV_CODEC_ID_IDF = $30494446, // MKBETAG( 0 ,'I','D','F'),
AV_CODEC_ID_OTF = $304F5446, // MKBETAG( 0 ,'O','T','F'),
AV_CODEC_ID_ADPCM_G726LE = $36323736, // MKBETAG('6','2','7','G'),
AV_CODEC_ID_ADPCM_AFC = $41464320, // MKBETAG('A','F','C',' '),
AV_CODEC_ID_ASS = $41535320, // MKBETAG('A','S','S',' '), //< ASS as defined in Matroska
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_BRENDER_PIX = $42504958, // MKBETAG('B','P','I','X'),
AV_CODEC_ID_BINTEXT = $42545854, // MKBETAG('B','T','X','T'),
AV_CODEC_ID_CPIA = $43504941, // MKBETAG('C','P','I','A'),
AV_CODEC_ID_DVD_NAV = $444E4156, // MKBETAG('D','N','A','V'),
AV_CODEC_ID_ADPCM_DTK = $44544B20, // MKBETAG('D','T','K',' '),
AV_CODEC_ID_ESCAPE130 = $45313330, // MKBETAG('E','1','3','0'),
AV_CODEC_ID_FFWAVESYNTH = $46465753, // MKBETAG('F','F','W','S'),
AV_CODEC_ID_HEVC = $48323635, // MKBETAG('H','2','6','5'),
AV_CODEC_ID_JACOSUB = $4A535542, // MKBETAG('J','S','U','B'),
AV_CODEC_ID_SMPTE_KLV = $4B4C5641, // MKBETAG('K','L','V','A'),
AV_CODEC_ID_MPL2 = $4D504C32, // MKBETAG('M','P','L','2'),
AV_CODEC_ID_MVC1 = $4D564331, // MKBETAG('M','V','C','1'),
AV_CODEC_ID_MVC2 = $4D564332, // MKBETAG('M','V','C','2'),
AV_CODEC_ID_ADPCM_IMA_OKI = $4F4B4920, // MKBETAG('O','K','I',' '),
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_PCM_S16BE_PLANAR = $50535010, // MKBETAG('P','S','P',16),
AV_CODEC_ID_PJS = $50684A53, // MKBETAG('P','h','J','S'),
AV_CODEC_ID_ADPCM_IMA_RAD = $52414420, // MKBETAG('R','A','D',' '),
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_SGIRLE = $53474952, // MKBETAG('S','G','I','R'),
AV_CODEC_ID_SMVJPEG = $534D564A, // MKBETAG('S','M','V','J'),
AV_CODEC_ID_SNOW = $534E4F57, // MKBETAG('S','N','O','W'),
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_SUBVIEWER1 = $53625631, // MKBETAG('S','b','V','1'),
AV_CODEC_ID_SUBVIEWER = $53756256, // MKBETAG('S','u','b','V'),
AV_CODEC_ID_TARGA_Y216 = $54323136, // MKBETAG('T','2','1','6'),
AV_CODEC_ID_V308 = $56333038, // MKBETAG('V','3','0','8'),
AV_CODEC_ID_V408 = $56343038, // MKBETAG('V','4','0','8'),
AV_CODEC_ID_VIMA = $56494D41, // MKBETAG('V','I','M','A'),
AV_CODEC_ID_VPLAYER = $56506C72, // MKBETAG('V','P','l','r'),
AV_CODEC_ID_WEBP = $57454250, // MKBETAG('W','E','B','P'),
AV_CODEC_ID_WEBVTT = $57565454, // MKBETAG('W','V','T','T'),
AV_CODEC_ID_XBIN = $5842494E, // MKBETAG('X','B','I','N'),
AV_CODEC_ID_XFACE = $58464143, // MKBETAG('X','F','A','C'),
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'),
AV_CODEC_ID_EVRC = $73657663, // MKBETAG('s','e','v','c'),
AV_CODEC_ID_SMV = $73736D76, // MKBETAG('s','s','m','v'),
AV_CODEC_ID_TAK = $7442614B // MKBETAG('t','B','a','K'),
{$IFDEF FF_API_CODEC_ID}
{$INCLUDE old_codec_ids.inc}
{$ENDIF}
);
const
AV_PKT_FLAG_KEY = $0001;
/// < The packet contains a keyframe
AV_PKT_FLAG_CORRUPT = $0002;
/// < The packet content is corrupted
//
AV_CODEC_ID_H265 = AV_CODEC_ID_HEVC;
Type
(*
* This struct describes the properties of a single codec described by an
* AVCodecID.
* @see avcodec_get_descriptor()
*)
pAVCodecDescriptor = ^TAVCodecDescriptor;
TAVCodecDescriptor = record
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: Integer;
end;
(*
* Codec uses only intra compression.
* Video codecs only.
*)
// #define AV_CODEC_PROP_INTRA_ONLY (1 << 0)
(*
// * Codec supports lossy compression. Audio and video codecs only.
// * @note a codec may support both lossy and lossless
// * compression modes
*)
// #define AV_CODEC_PROP_LOSSY (1 << 1)
(*
// * Codec supports lossless compression. Audio and video codecs only.
*)
// #define AV_CODEC_PROP_LOSSLESS (1 << 2)
(*
// * Subtitle codec is bitmap based
// * Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field.
*)
// #define AV_CODEC_PROP_BITMAP_SUB (1 << 16)
(*
// * Subtitle codec is text based.
// * Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field.
*)
// #define AV_CODEC_PROP_TEXT_SUB (1 << 17)
Const
(*
* @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_encoding
// * minimum encoding buffer size
// * Used to avoid some checks during header writing.
*)
// #define FF_MIN_BUFFER_SIZE 16384
//
//
(*
// * @ingroup lavc_encoding
// * motion estimation type.
*)
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_TESA,
/// < transformed exhaustive search algorithm
ME_ITER = 50
/// < iterative search
);
(*
* @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_BT2020 = 9,
/// < ITU-R BT2020
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_TRC_SMPTE170M = 6,
/// < also ITU-R BT601-6 525 or 625 / ITU-R BT1358 525 or 625 / ITU-R BT1700 NTSC
AVCOL_TRC_SMPTE240M = 7, AVCOL_TRC_LINEAR = 8,
/// < "Linear transfer characteristics"
AVCOL_TRC_LOG = 9,
/// < "Logarithmic transfer characteristic (100:1 range)"
AVCOL_TRC_LOG_SQRT = 10,
/// < "Logarithmic transfer characteristic (100 * Sqrt( 10 ) : 1 range)"
AVCOL_TRC_IEC61966_2_4 = 11,
/// < IEC 61966-2-4
AVCOL_TRC_BT1361_ECG = 12,
/// < ITU-R BT1361 Extended Colour Gamut
AVCOL_TRC_IEC61966_2_1 = 13,
/// < IEC 61966-2-1 (sRGB or sYCC)
AVCOL_TRC_BT2020_10 = 14,
/// < ITU-R BT2020 for 10 bit system
AVCOL_TRC_BT2020_12 = 15,
/// < ITU-R BT2020 for 12 bit system
AVCOL_TRC_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_encoding
*)
pRcOverride = ^TRcOverride;
TRcOverride = record
start_frame: Integer;
end_frame: Integer;
qscale: Integer;
// If this is 0 then quality_factor will be used instead.
quality_factor: single;
end;
// #if FF_API_MAX_BFRAMES
(*
// * @deprecated there is no libavcodec-wide limit on the number of B-frames
*)
// #define FF_MAX_B_FRAMES 16
// #endif
const
(* encoding support
These flags can be passed in AVCodecContext.flags before initialization.
Note: Not everything is supported yet.
* )
(*
* Allow decoders to produce frames with data planes that are not aligned
* to CPU requirements (e.g. due to cropping).
*)
CODEC_FLAG_UNALIGNED = $0001;
CODEC_FLAG_QSCALE = $0002;
/// < Use fixed qscale.
CODEC_FLAG_4MV = $0004;
/// < 4 MV per MB allowed / advanced prediction for H.263.
CODEC_FLAG_OUTPUT_CORRUPT = $0008;
/// < Output even those frames that might be corrupted
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_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;
/// < H.263 advanced intra coding / MPEG-4 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!!!!
CODEC_FLAG2_IGNORE_CROP = $00010000;
/// < Discard cropping information from SPS.
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
* Independent 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;
// #if FF_API_XVMC
(* Codec can export data for HW decoding (XvMC). *)
// #define CODEC_CAP_HWACCEL $0010
// #endif (* FF_API_XVMC *)
(*
* Encoder or decoder requires flushing with NULL input at the end in order to
* give the complete and correct output.
*
* NOTE: If this flag is not set, the codec is guaranteed to never be fed with
* with NULL data. The user can still send NULL data to the public encode
* or decode function, but libavcodec will not pass it along to the codec
* unless this flag is set.
*
* Decoders:
* The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
* avpkt->size=0 at the end to get the delayed data until the decoder no longer
* returns frames.
*
* Encoders:
* The encoder needs to be fed with NULL data at the end of encoding until the
* encoder no longer returns data.
*
* NOTE: For encoders implementing the AVCodec.encode2() function, setting this
* flag also means that the encoder must set the pts and duration for
* each output packet. If this flag is not set, the pts and duration will
* be determined by libavcodec from the input frame.
*)
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;
// #if FF_API_CAP_VDPAU
(*
* Codec can export data for HW decoding (VDPAU).
*)
// #define CODEC_CAP_HWACCEL_VDPAU $0080
// #endif
(*
* Codec can output multiple frames per AVPacket
* Normally demuxers return one frame at a time, demuxers which do not do
* are connected to a parser to split what they return into proper frames.
* This flag is reserved to the very rare category of codecs which have a
* bitstream that cannot be split into frames without timeconsuming
* operations like full decoding. Demuxers carring such bitstreams thus
* may return multiple frames in a packet. This has many disadvantages like
* prohibiting stream copy in many cases thus it should only be considered
* as a last resort.
*)
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.
*)
// #define CODEC_CAP_FRAME_THREADS $1000
(*
// * Codec supports slice-based (or partition-based) multithreading.
*)
// #define CODEC_CAP_SLICE_THREADS $2000
(*
// * Codec supports changed parameters at any point.
*)
// #define CODEC_CAP_PARAM_CHANGE $4000
(*
// * Codec supports avctx->thread_count == 0 (auto).
*)
// #define CODEC_CAP_AUTO_THREADS $8000
(*
// * Audio encoder supports receiving a different number of samples in each call.
*)
// #define CODEC_CAP_VARIABLE_FRAME_SIZE $10000
(*
// * Codec is intra only.
*)
// #define CODEC_CAP_INTRA_ONLY $40000000
(*
// * Codec is lossless.
*)
// #define CODEC_CAP_LOSSLESS $80000000
//
// #if FF_API_MB_TYPE
/// /The following defines may change, don't expect compatibility if you use them.
// #define MB_TYPE_INTRA4x4 $0001
// #define MB_TYPE_INTRA16x16 $0002 //FIXME H.264-specific
// #define MB_TYPE_INTRA_PCM $0004 //FIXME H.264-specific
// #define MB_TYPE_16x16 $0008
// #define MB_TYPE_16x8 $0010
// #define MB_TYPE_8x16 $0020
// #define MB_TYPE_8x8 $0040
// #define MB_TYPE_INTERLACED $0080
// #define MB_TYPE_DIRECT2 $0100 //FIXME
// #define MB_TYPE_ACPRED $0200
// #define MB_TYPE_GMC $0400
// #define MB_TYPE_SKIP $0800
// #define MB_TYPE_P0L0 $1000
// #define MB_TYPE_P1L0 $2000
// #define MB_TYPE_P0L1 $4000
// #define MB_TYPE_P1L1 $8000
// #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
// #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
// #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
// #define MB_TYPE_QUANT $00010000
// #define MB_TYPE_CBP $00020000
/// /Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
// #endif
//
(*
// * Pan Scan area.
// * This specifies the area which should be displayed.
// * Note there may be multiple such areas for one frame.
*)
// typedef struct AVPanScan{
(*
// * id
// * - encoding: Set by user.
// * - decoding: Set by libavcodec.
*)
// int id;
//
(*
// * width and height in 1/16 pel
// * - encoding: Set by user.
// * - decoding: Set by libavcodec.
*)
// int width;
// int height;
//
(*
// * position of the top left corner in 1/16 pel for up to 3 fields/frames
// * - encoding: Set by user.
// * - decoding: Set by libavcodec.
*)
// int16_t position[3][2];
// }AVPanScan;
//
// #if FF_API_QSCALE_TYPE
// #define FF_QSCALE_TYPE_MPEG1 0
// #define FF_QSCALE_TYPE_MPEG2 1
// #define FF_QSCALE_TYPE_H264 2
// #define FF_QSCALE_TYPE_VP56 3
// #endif
//
// #if FF_API_GET_BUFFER
// #define FF_BUFFER_TYPE_INTERNAL 1
// #define FF_BUFFER_TYPE_USER 2 ///< direct rendering buffers (image is (de)allocated by user)
// #define FF_BUFFER_TYPE_SHARED 4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
// #define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
//
// #define FF_BUFFER_HINTS_VALID $01 // Buffer hints value is meaningful (if 0 ignore).
// #define FF_BUFFER_HINTS_READABLE $02 // Codec will read from buffer.
// #define FF_BUFFER_HINTS_PRESERVE $04 // User must not alter buffer content.
// #define FF_BUFFER_HINTS_REUSABLE $08 // Codec will reuse the buffer (update).
// #endif
//
(*
// * The decoder will keep a reference to the frame and may reuse it later.
*)
// #define AV_GET_BUFFER_FLAG_REF (1 << 0)
(*
// * @defgroup lavc_packet AVPacket
// *
// * Types and functions for working with AVPacket.
// * @{
*)
Type
TAVPacketSideDataType = ( //
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,
(*
* A list of zero terminated key/value strings. There is no end marker for
* the list, so it is required to rely on the side data size to stop.
*)
AV_PKT_DATA_STRINGS_METADATA,
(*
* Subtitle event position
* @code
* u32le x1
* u32le y1
* u32le x2
* u32le y2
* @endcode
*)
AV_PKT_DATA_SUBTITLE_POSITION,
(*
* Data found in BlockAdditional element of matroska container. There is
* no end marker for the data, so it is required to rely on the side data
* size to recognize the end. 8 byte id (as found in BlockAddId) followed
* by data.
*)
AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
(*
* The optional first identifier line of a WebVTT cue.
*)
AV_PKT_DATA_WEBVTT_IDENTIFIER,
(*
* The optional settings (rendering instructions) that immediately
* follow the timestamp specifier of a WebVTT cue.
*)
AV_PKT_DATA_WEBVTT_SETTINGS);
(*
* This structure stores compressed data. It is typically exported by demuxers
* and then passed as input to decoders, or received as output from encoders and
* then passed to muxers.
*
* For video, it should typically contain one compressed frame. For audio it may
* contain several compressed frames.
*
* AVPacket is one of the few structs in FFmpeg, whose size is a part of public
* ABI. Thus it may be allocated on stack and no new fields can be added to it
* without libavcodec and libavformat major bump.
*
* The semantics of data ownership depends on the buf or destruct (deprecated)
* fields. If either is set, the packet data is dynamically allocated and is
* valid indefinitely until av_free_packet() is called (which in turn calls
* av_buffer_unref()/the destruct callback to free the data). If neither is set,
* the packet data is typically backed by some static buffer somewhere and is
* only valid for a limited time (e.g. until the next read call when demuxing).
*
* The side data is always allocated with av_malloc() and is freed in
* av_free_packet().
*)
Type
pAVHWAccel = ^TAVHWAccel;
pAVPacket = ^TAVPacket;
pSide_data = ^TSide_data;
TSide_data = record
data: pByte;
size: Integer;
_type: TAVPacketSideDataType;
end;
TAVPacket = record
(*
* A reference to the reference-counted buffer where the packet data is
* stored.
* May be NULL, then the packet data is not reference-counted.
*)
buf: pAVBufferRef;
(*
* 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: int64_t;
(*
* 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: int64_t;
data: pByte;
size: Integer;
stream_index: Integer;
(*
* A combination of AV_PKT_FLAG values
*)
flags: Integer;
(*
* Additional packet data that can be provided by the container.
* Packet can contain several types of side information.
*)
side_data: pSide_data;
side_data_elems: Integer;
(*
* Duration of this packet in AVStream->time_base units, 0 if unknown.
* Equals next_pts - this_pts in presentation order.
*)
duration: Integer;
{$IFDEF FF_API_DESTRUCT_PACKET}
destruct: procedure(AV_Packet: pAVPacket); cdecl;
priv: pointer;
{$ENDIF}
pos: int64_t;
// < byte position in stream, -1 if unknown
(*
* Time difference in AVStream->time_base units from the pts of this
* packet to the point at which the output from the decoder has converged
* independent from the availability of previous frames. That is, the
* frames are virtually identical no matter if decoding started from
* the very first frame or from this keyframe.
* Is AV_NOPTS_VALUE if unknown.
* This field is not the display duration of the current packet.
* This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
* set.
*
* The purpose of this field is to allow seeking in streams that have no
* keyframes in the conventional sense. It corresponds to the
* recovery point SEI in H.264 and match_time_delta in NUT. It is also
* essential for some types of subtitle streams to ensure that all
* subtitles are correctly displayed after seeking.
*)
convergence_duration: int64_t;
end;
TAVSideDataParamChangeFlags = ( //
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 //
);
// struct AVCodecInternal;
TAVFieldOrder = ( //
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*.
*)
pAVCodecContext = ^TAVCodecContext;
ppAVCodecContext = ^pAVCodecContext;
// int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
TExecuteFunc = function(c2: pAVCodecContext; arg: pointer): Integer; cdecl;
TExecute = function(c: pAVCodecContext; ExecuteFunc: TExecuteFunc; arg2: pointer; ret: PInteger; count: Integer; size: Integer)
: Integer; cdecl;
// int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
TExecuteFunc2 = function(c2: pAVCodecContext; arg: pointer; jobnr: Integer; threadnr: Integer): Integer; cdecl;
TExecute2 = function(c: pAVCodecContext; ExecuteFunc2: TExecuteFunc2; arg2: pointer; ret: PInteger; count: Integer)
: Integer; cdecl;
pAVCodec = ^TAVCodec;
TAVCodecInternal = record
end;
pAVCodecInternal = ^TAVCodecInternal;
TAVCodecContext = record
(*
* information on struct for av_log
* - set by avcodec_alloc_context3
*)
av_class: pAVClass;
log_level_offset: Integer;
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;
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: Integer;
(*
* 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;
// #define FF_COMPRESSION_DEFAULT -1
(*
* 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 problems 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;
(*
* Codec delay.
*
* 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:
* For encoding, this is the number of "priming" samples added to the
* beginning of the stream. The decoded output will be delayed by this
* many samples relative to the input to the encoder. Note that this
* field is purely informational and does not directly affect the pts
* output by the encoder, which should always be based on the actual
* presentation time, including any delay.
* For decoding, this is the number of samples the decoder needs to
* output before the decoder's output is valid. When seeking, you should
* start decoding this many samples prior to your desired seek point.
*
* - encoding: Set by libavcodec.
* - decoding: Set by libavcodec.
*)
delay: cint;
(* video only *)
(*
* picture width / height.
* - encoding: MUST be set by user.
* - decoding: May be set by the user before opening the decoder if known e.g.
* from the container. Some decoders will require the dimensions
* to be set by the caller. During decoding, the decoder may
* overwrite those values as required.
*)
width, height: cint;
(*
* Bitstream width / height, may be different from width/height e.g. when
* the decoded frame is cropped before being output or lowres is enabled.
* - encoding: unused
* - decoding: May be set by the user before opening the decoder if known
* e.g. from the container. During decoding, the decoder may
* overwrite those values as required.
*)
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 AV_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.
* When multithreading is used, it may be called from multiple threads
* at the same time; threads might draw different parts of the same AVFrame,
* or multiple AVFrames, and there is no guarantee that slices will be drawn
* in order.
* The function is also used by hardware acceleration APIs.
* It is called at least once during frame decoding to pass
* the data needed for hardware render.
* In that mode instead of pixel data, AVFrame points to
* a structure specific to the acceleration API. The application
* reads the structure and can change some fields to indicate progress
* or mark state.
* - encoding: unused
* - decoding: Set by user.
* @param height the height of the slice
* @param y the y position of the slice
* @param type 1->top field, 2->bottom field, 3->frame
* @param offset offset into the AVFrame.data from which the slice should be read
*)
// void (*draw_horiz_band)(struct AVCodecContext *s,
// const AVFrame *src, int offset[AV_NUM_DATA_POINTERS],
// int y, int type, int height);
draw_horiz_band: procedure(s: pAVCodecContext; const src: 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.
*)
// enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
get_format: function(s: pAVCodecContext; const fmt: 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;
// #define FF_RC_STRATEGY_XVID 1
b_frame_strategy: cint;
(*
* 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: Integer;
(*
* 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;
// #define FF_DEFAULT_QUANT_BIAS 999999
(*
* inter quantizer bias
* - encoding: Set by user.
* - decoding: unused
*)
inter_quant_bias: cint;
(*
* slice flags
* - encoding: unused
* - decoding: Set by user.
*)
slice_flags: cint;
{$IFDEF FF_API_XVMC}
(*
* XVideo Motion Acceleration
* - encoding: forbidden
* - decoding: set by decoder
* @deprecated XvMC support is slated for removal.
*)
// attribute_deprecated
xvmc_acceleration: cint;
{$ENDIF} // * FF_API_XVMC * /
(*
* 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;
(*
* 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 user.
*)
field_order: TAVFieldOrder;
(* 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. *)
(*
* Number of samples per channel in an audio frame.
*
* - encoding: set by libavcodec in avcodec_open2(). Each submitted frame
* except the last must contain exactly frame_size samples per channel.
* May be 0 when the codec has CODEC_CAP_VARIABLE_FRAME_SIZE set, then the
* frame size is not restricted.
* - decoding: may be set by some decoders to indicate constant frame size
*)
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;
(*
* 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;
{$IFDEF FF_API_REQUEST_CHANNELS}
(*
* Decoder should decode to this many channels if it can (0 for default)
* - encoding: unused
* - decoding: Set by user.
* @deprecated Deprecated in favor of request_channel_layout.
*)
// attribute_deprecated
request_channels: cint;
{$ENDIF}
(*
* Audio channel layout.
* - encoding: set by user.
* - decoding: set by user, may be overwritten by libavcodec.
*)
channel_layout: cuint64;
(*
* Request decoder to use this channel layout if it can (0 for default)
* - encoding: unused
* - decoding: Set by user.
*)
request_channel_layout: cuint64;
(*
* Type of service that the audio stream conveys.
* - encoding: Set by user.
* - decoding: Set by libavcodec.
*)
audio_service_type: TAVAudioServiceType;
(*
* desired sample format
* - encoding: Not used.
* - decoding: Set by user.
* Decoder will decode to this format if it can.
*)
request_sample_fmt: TAVSampleFormat;
{$IFDEF FF_API_GET_BUFFER}
(*
* Called at the beginning of each frame to get a buffer for it.
*
* The function will set AVFrame.data[], AVFrame.linesize[].
* AVFrame.extended_data[] must also be set, but it should be the same as
* AVFrame.data[] except for planar audio with more channels than can fit
* in AVFrame.data[]. In that case, AVFrame.data[] shall still contain as
* many data pointers as it can hold.
*
* if CODEC_CAP_DR1 is not set then get_buffer() must call
* avcodec_default_get_buffer() instead of providing buffers allocated by
* some other means.
*
* AVFrame.data[] should be 32- or 16-byte-aligned unless the CPU doesn't
* need it. avcodec_default_get_buffer() aligns the output buffer properly,
* but if get_buffer() is overridden then alignment considerations should
* be taken into account.
*
* @see avcodec_default_get_buffer()
*
* Video:
*
* If pic.reference is set then the frame will be read later by libavcodec.
* avcodec_align_dimensions2() should be used to find the required width and
* height, as they normally need to be rounded up to the next multiple of 16.
*
* If frame multithreading is used and thread_safe_callbacks is set,
* it may be called from a different thread, but not from more than one at
* once. Does not need to be reentrant.
*
* @see release_buffer(), reget_buffer()
* @see avcodec_align_dimensions2()
*
* Audio:
*
* Decoders request a buffer of a particular size by setting
* AVFrame.nb_samples prior to calling get_buffer(). The decoder may,
* however, utilize only part of the buffer by setting AVFrame.nb_samples
* to a smaller value in the output frame.
*
* Decoders cannot use the buffer after returning from
* avcodec_decode_audio4(), so they will not call release_buffer(), as it
* is assumed to be released immediately upon return. In some rare cases,
* a decoder may need to call get_buffer() more than once in a single
* call to avcodec_decode_audio4(). In that case, when get_buffer() is
* called again after it has already been called once, the previously
* acquired buffer is assumed to be released at that time and may not be
* reused by the decoder.
*
* As a convenience, av_samples_get_buffer_size() and
* av_samples_fill_arrays() in libavutil may be used by custom get_buffer()
* functions to find the required data size and to fill data pointers and
* linesize. In AVFrame.linesize, only linesize[0] may be set for audio
* since all planes must be the same size.
*
* @see av_samples_get_buffer_size(), av_samples_fill_arrays()
*
* - encoding: unused
* - decoding: Set by libavcodec, user can override.
*
* @deprecated use get_buffer2()
*)
// attribute_deprecated
// int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
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.
* May be called from a different thread if frame multithreading is used,
* but not by more than one thread at once, so does not need to be reentrant.
* - encoding: unused
* - decoding: Set by libavcodec, user can override.
*
* @deprecated custom freeing callbacks should be set from get_buffer2()
*)
// attribute_deprecated
// void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
release_buffer: procedure(c: pAVCodecContext; pic: pAVFrame); cdecl; { deprecated; }
(*
* Called at the beginning of a frame to get cr buffer for it.
* Buffer type (size, hints) must be the same. libavcodec won't check it.
* libavcodec will pass previous buffer in pic, function should return
* same buffer or new buffer with old frame "painted" into it.
* If pic.data[0] == NULL must behave like get_buffer().
* if CODEC_CAP_DR1 is not set then reget_buffer() must call
* avcodec_default_reget_buffer() instead of providing buffers allocated by
* some other means.
* - encoding: unused
* - decoding: Set by libavcodec, user can override.
*)
// attribute_deprecated
// int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
reget_buffer: function(c: pAVCodecContext; pic: pAVFrame): cint; cdecl; { deprecated; }
{$ENDIF}
(*
* This callback is called at the beginning of each frame to get data
* buffer(s) for it. There may be one contiguous buffer for all the data or
* there may be a buffer per each data plane or anything in between. What
* this means is, you may set however many entries in buf[] you feel necessary.
* Each buffer must be reference-counted using the AVBuffer API (see description
* of buf[] below).
*
* The following fields will be set in the frame before this callback is
* called:
* - format
* - width, height (video only)
* - sample_rate, channel_layout, nb_samples (audio only)
* Their values may differ from the corresponding values in
* AVCodecContext. This callback must use the frame values, not the codec
* context values, to calculate the required buffer size.
*
* This callback must fill the following fields in the frame:
* - data[]
* - linesize[]
* - extended_data:
* * if the data is planar audio with more than 8 channels, then this
* callback must allocate and fill extended_data to contain all pointers
* to all data planes. data[] must hold as many pointers as it can.
* extended_data must be allocated with av_malloc() and will be freed in
* av_frame_unref().
* * otherwise exended_data must point to data
* - buf[] must contain one or more pointers to AVBufferRef structures. Each of
* the frame's data and extended_data pointers must be contained in these. That
* is, one AVBufferRef for each allocated chunk of memory, not necessarily one
* AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(),
* and av_buffer_ref().
* - extended_buf and nb_extended_buf must be allocated with av_malloc() by
* this callback and filled with the extra buffers if there are more
* buffers than buf[] can hold. extended_buf will be freed in
* av_frame_unref().
*
* If CODEC_CAP_DR1 is not set then get_buffer2() must call
* avcodec_default_get_buffer2() instead of providing buffers allocated by
* some other means.
*
* Each data plane must be aligned to the maximum required by the target
* CPU.
*
* @see avcodec_default_get_buffer2()
*
* Video:
*
* If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused
* (read and/or written to if it is writable) later by libavcodec.
*
* If CODEC_FLAG_EMU_EDGE is not set in s->flags, the buffer must contain an
* edge of the size returned by avcodec_get_edge_width() on all sides.
*
* avcodec_align_dimensions2() should be used to find the required width and
* height, as they normally need to be rounded up to the next multiple of 16.
*
* If frame multithreading is used and thread_safe_callbacks is set,
* this callback may be called from a different thread, but not from more
* than one at once. Does not need to be reentrant.
*
* @see avcodec_align_dimensions2()
*
* Audio:
*
* Decoders request a buffer of a particular size by setting
* AVFrame.nb_samples prior to calling get_buffer2(). The decoder may,
* however, utilize only part of the buffer by setting AVFrame.nb_samples
* to a smaller value in the output frame.
*
* As a convenience, av_samples_get_buffer_size() and
* av_samples_fill_arrays() in libavutil may be used by custom get_buffer2()
* functions to find the required data size and to fill data pointers and
* linesize. In AVFrame.linesize, only linesize[0] may be set for audio
* since all planes must be the same size.
*
* @see av_samples_get_buffer_size(), av_samples_fill_arrays()
*
* - encoding: unused
* - decoding: Set by libavcodec, user can override.
*)
// int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags);
get_buffer2: function(s: pAVCodecContext; frame: pAVFrame; flags: cint): cint; cdecl;
(*
* If non-zero, the decoded audio and video frames returned from
* avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted
* and are valid indefinitely. The caller must free them with
* av_frame_unref() when they are not needed anymore.
* Otherwise, the decoded frames must not be freed by the caller and are
* only valid until the next decode call.
*
* - encoding: unused
* - decoding: set by the caller before avcodec_open2().
*)
refcounted_frames: cint;
// * - 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: 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
* - 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. *)
(* It depends on the encoder if the data starts *)
(* with a Start Code (it should). H.263 does. *)
(* mb_nb contains the number of macroblocks *)
(* encoded in the RTP payload. *)
// void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
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 its best to deliver a chunk with size *)
(* below rtp_payload_size, the chunk will start *)
(* with a start code on some codecs like H.263. *)
(* This doesn't take account of any particular *)
(* headers inside the transmitted RTP payload. *)
//
(* statistics, used for 2-pass encoding *)
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;
{$IFDEF FF_API_DEBUG_MV}
(*
* debug
* Code outside libavcodec should access this field using AVOptions
* - encoding: Set by user.
* - decoding: Set by user.
*)
debug_mv: cint;
{$ENDIF}
{ *
* Error recognition; may misdetect some more or less valid parts as errors.
* - encoding: unused
* - decoding: Set by user.
* }
err_recognition: cint;
(*
* Verify checksums embedded in the bitstream (could be of either encoded or
* decoded data, depending on the codec) and print an error message on mismatch.
* If AV_EF_EXPLODE is also set, a mismatching checksum will result in the
* decoder returning an error.
*)
(*
* opaque 64bit number (generally a PTS) that will be reordered and
* output in AVFrame.reordered_opaque
* @deprecated in favor of pkt_pts
* - encoding: unused
* - decoding: Set by user.
*)
reordered_opaque: cint64;
(*
* Hardware accelerator in use
* - encoding: unused.
* - decoding: Set by libavcodec
*)
hwaccel: pAVHWAccel;
(*
* Hardware accelerator context.
* For some hardware accelerators, a global context needs to be
* provided by the user. In that case, this holds display-dependent
* data FFmpeg cannot instantiate itself. Please refer to the
* FFmpeg HW accelerator documentation to know how to fill this
* is. e.g. for VA API, this is a struct vaapi_context.
* - encoding: unused
* - decoding: Set by user
*)
hwaccel_context: pointer;
(*
* error
* - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
* - decoding: unused
*)
error: array [0 .. AV_NUM_DATA_POINTERS - 1] of cuint64;
(*
* DCT algorithm, see FF_DCT_* below
* - encoding: Set by user.
* - decoding: unused
*)
dct_algo: cint;
(*
* IDCT algorithm, see FF_IDCT_* below.
* - encoding: Set by user.
* - decoding: Set by user.
*)
idct_algo: cint;
(*
* bits per sample/pixel from the demuxer (needed for huffyuv).
* - encoding: Set by libavcodec.
* - decoding: Set by user.
*)
bits_per_coded_sample: cint;
(*
* Bits per sample/pixel of internal libavcodec pixel/sample format.
* - encoding: set by user.
* - decoding: set by libavcodec.
*)
bits_per_raw_sample: cint;
{$IFDEF FF_API_LOWRES}
(*
* low resolution decoding, 1-> 1/2 size, 2->1/4 size
* - encoding: unused
* - decoding: Set by user.
* Code outside libavcodec should access this field using:
* av_codec_{get,set } _lowres(avctx)
*)
lowres: cint;
{$ENDIF}
(*
* 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
* synchronously from another thread, which allows faster multithreaded decoding.
* draw_horiz_band() will be called from other threads regardless of this setting.
* Ignored if the default get_buffer() is used.
* - encoding: Set by user.
* - decoding: Set by user.
*)
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.
*)
// int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
execute: function(c: pAVCodecContext; func: TExecuteFunc; arg2: pointer; Var ret: cint; 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.
*)
// int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
execute2: function(c: pAVCodecContext; func: TExecuteFunc2; arg2: pointer; var ret: cint; count: cint): cint; cdecl;
{$IFDEF FF_API_THREAD_OPAQUE}
(*
* @deprecated this field should not be used from outside of lavc
*)
// attribute_deprecated
thread_opaque: pointer;
{$ENDIF}
(*
* noise vs. sse weight for the nsse comparsion function
* - encoding: Set by user.
* - decoding: unused
*)
nsse_weight: cint;
(*
* profile
* - encoding: Set by user.
* - decoding: Set by libavcodec.
*)
profile: cint;
(*
* level
* - encoding: Set by user.
* - decoding: Set by libavcodec.
*)
level: cint;
(*
* Skip loop filtering for selected frames.
* - encoding: unused
* - decoding: Set by user.
*)
skip_loop_filter: TAVDiscard;
(*
* Skip IDCT/dequantization for selected frames.
* - encoding: unused
* - decoding: Set by user.
*)
skip_idct: TAVDiscard;
(*
* Skip decoding for selected frames.
* - encoding: unused
* - decoding: Set by user.
*)
skip_frame: TAVDiscard;
(*
* Header containing style information for text subtitles.
* For SUBTITLE_ASS subtitle type, it should contain the whole ASS
* [Script Info] and [V4+ Styles] section, plus the [Events] line and
* the Format line following. It shouldn't include any Dialogue line.
* - encoding: Set/allocated/freed by user (before avcodec_open2())
* - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
*)
subtitle_header: pByte;
subtitle_header_size: cint;
{$IFDEF FF_API_ERROR_RATE}
(*
* @deprecated use the 'error_rate' private AVOption of the mpegvideo
* encoders
*)
// attribute_deprecated
error_rate: cint;
{$ENDIF}
{$IFDEF FF_API_CODEC_PKT}
(*
* @deprecated this field is not supposed to be accessed from outside lavc
*)
// attribute_deprecated
pkt: pAVPacket;
{$ENDIF}
(*
* VBV delay coded in the last frame (in periods of a 27 MHz clock).
* Used for compliant TS muxing.
* - encoding: Set by libavcodec.
* - decoding: unused.
*)
vbv_delay: cuint64;
(*
* Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
* Code outside libavcodec should access this field using:
* av_codec_{get,set}_pkt_timebase(avctx)
* - encoding unused.
* - decoding set by user.
*)
pkt_timebase: TAVRational;
(*
* AVCodecDescriptor
* Code outside libavcodec should access this field using:
* av_codec_{get,set}_codec_descriptor(avctx)
* - encoding: unused.
* - decoding: set by libavcodec.
*)
codec_descriptor: pAVCodecDescriptor;
{$IFNDEF FF_API_LOWRES}
(*
* low resolution decoding, 1-> 1/2 size, 2->1/4 size
* - encoding: unused
* - decoding: Set by user.
* Code outside libavcodec should access this field using:
* av_codec_{get,set}_lowres(avctx)
*)
lowres: Integer;
{$ENDIF}
(*
* Current statistics for PTS correction.
* - decoding: maintained and used by libavcodec, not intended to be used by user apps
* - encoding: unused
*)
pts_correction_num_faulty_pts: cint64;
/// Number of incorrect PTS values so far
pts_correction_num_faulty_dts: cint64;
/// Number of incorrect DTS values so far
pts_correction_last_pts: cint64;
/// PTS of the last frame
pts_correction_last_dts: cint64;
/// DTS of the last frame
(*
* Character encoding of the input subtitles file.
* - decoding: set by user
* - encoding: unused
*)
sub_charenc: pAnsiChar;
(*
* Subtitles character encoding mode. Formats or codecs might be adjusting
* this setting (if they are doing the conversion themselves for instance).
* - decoding: set by libavcodec
* - encoding: unused
*)
sub_charenc_mode: cint;
(*
* Skip processing alpha if supported by codec.
* Note that if the format uses pre-multiplied alpha (common with VP6,
* and recommended due to better video quality/compression)
* the image will look as if alpha-blended onto a black background.
* However for formats that do not use pre-multiplied alpha
* there might be serious artefacts (though e.g. libswscale currently
* assumes pre-multiplied alpha anyway).
* Code outside libavcodec should access this field using AVOptions
*
* - decoding: set by user
* - encoding: unused
*)
skip_alpha: cint;
(*
* Number of samples to skip after a discontinuity
* - decoding: unused
* - encoding: set by libavcodec
*)
seek_preroll: cint;
{$IFNDEF FF_API_DEBUG_MV}
(*
* debug motion vectors
* Code outside libavcodec should access this field using AVOptions
* - encoding: Set by user.
* - decoding: Set by user.
*)
debug_mv: cint;
{$ENDIF}
end;
// AVRational av_codec_get_pkt_timebase (const AVCodecContext *avctx);
// void av_codec_set_pkt_timebase (AVCodecContext *avctx, AVRational val);
//
// const AVCodecDescriptor *av_codec_get_codec_descriptor(const AVCodecContext *avctx);
// void av_codec_set_codec_descriptor(AVCodecContext *avctx, const AVCodecDescriptor *desc);
//
// int av_codec_get_lowres(const AVCodecContext *avctx);
// void av_codec_set_lowres(AVCodecContext *avctx, int val);
//
// int av_codec_get_seek_preroll(const AVCodecContext *avctx);
// void av_codec_set_seek_preroll(AVCodecContext *avctx, int val);
(*
* AVProfile.
*)
pAVProfile = ^TAVProfile;
TAVProfile = record
profile: Integer;
name: pAnsiChar;
/// < short name for the profile
end;
pAVCodecDefault = ^TAVCodecDefault;
TAVCodecDefault = record
end;
pAVSubtitle = ^TAVSubtitle;
TAVSubtitle = record
end;
(*
* AVCodec.
*)
TAVCodec = record
(*
* Name of the codec implementation.
* The name is globally unique among encoders and among decoders (but an
* encoder and a decoder can share the same name).
* This is the primary way to find a codec from the user perspective.
*)
name: pAnsiChar;
(*
* Descriptive name for the codec, meant to be more human readable than name.
* You should use the NULL_IF_CONFIG_SMALL() macro to define it.
*)
long_name: pAnsiChar;
_type: TAVMediaType;
id: TAVCodecID;
(*
* Codec capabilities.
* see CODEC_CAP_*
*)
capabilities: Integer;
supported_framerates: pAVRational;
/// < array of supported framerates, or NULL if any, array is terminated by {0,0}
pix_fmts: pAVPixelFormat;
/// < array of supported pixel formats, or NULL if unknown, array is terminated by -1
supported_samplerates: PInteger;
/// < array of supported audio samplerates, or NULL if unknown, array is terminated by 0
sample_fmts: pAVSampleFormat;
/// < array of supported sample formats, or NULL if unknown, array is terminated by -1
channel_layouts: puint64_t;
/// < array of support channel layouts, or NULL if unknown. array is terminated by 0
{$IFDEF FF_API_LOWRES}
max_lowres: uint8_t;
/// < maximum value for lowres supported by the decoder, no direct access, use av_codec_get_max_lowres()
{$ENDIF}
priv_class: pAVClass;
/// < AVClass for the private context
profiles: 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: Integer;
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.
*)
// int (*init_thread_copy)(AVCodecContext *);
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.
*)
// int (*update_thread_context)(AVCodecContext *dst, const AVCodecContext *src);
update_thread_context: function(dst: pAVCodecContext;
const src: pAVCodecContext): cint; cdecl;
(*
* Private codec-specific defaults.
*)
defaults: pAVCodecDefault;
(*
* Initialize codec static data, called from avcodec_register().
*)
// void (*init_static_data)(struct AVCodec *codec);
init_static_data: procedure(codec: pAVCodec); cdecl;
// int (*init)(AVCodecContext *);
init: function(avctx: pAVCodecContext): cint; cdecl;
// int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size, const struct AVSubtitle *sub);
encode_sub: function(avctx: pAVCodecContext; buf: pByte; buf_size: cint;
const sub: 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
*)
// int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr);
encode2: function(avctx: pAVCodecContext; avpkt: pAVPacket;
const frame: pAVFrame; got_packet_ptr: pcint): cint; cdecl;
// int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
decode: function(avctx: pAVCodecContext; outdata: pointer;
var outdata_size: cint; avpkt: pAVPacket): cint; cdecl;
// int (*close)(AVCodecContext *);
close: function(avctx: pAVCodecContext): cint; cdecl;
(*
* Flush buffers.
* Will be called when seeking
*)
// void (*flush)(AVCodecContext *);
flush: procedure(avctx: pAVCodecContext); cdecl;
end;
// int av_codec_get_max_lowres(const AVCodec *codec);
(*
* 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 AVMEDIA_TYPE_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: TAVPixelFormat;
(*
* Hardware accelerated codec capabilities.
* see FF_HWACCEL_CODEC_CAP_*
*)
capabilities: Integer;
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; const buf: pByte; buf_size: uint32): Integer; 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; const buf: pByte; buf_size: uint32): Integer; 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): Integer; 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: Integer;
end;
(*
* Picture data structure.
*
* Up to four components can be stored into it, the last component is
* alpha.
*)
pAVPicture = ^TAVPicture;
TAVPicture = record
data: TAVFrameByteArray;
/// < pointers to the image data planes
linesize: TAVNDPArray;
/// < number of bytes per line
end;
(*
// * @}
*)
//
// enum AVSubtitleType {
// SUBTITLE_NONE,
//
// SUBTITLE_BITMAP, ///< A bitmap, pict will be set
//
(*
// * Plain text, the text field must be set by the decoder and is
// * authoritative. ass and pict fields may contain approximations.
*)
// SUBTITLE_TEXT,
//
(*
// * Formatted text, the ass field must be set by the decoder and is
// * authoritative. pict and text fields may contain approximations.
*)
// SUBTITLE_ASS,
// };
//
// #define AV_SUBTITLE_FLAG_FORCED $00000001
//
// typedef struct AVSubtitleRect {
// int x; ///< top left corner of pict, undefined when pict is not set
// int y; ///< top left corner of pict, undefined when pict is not set
// int w; ///< width of pict, undefined when pict is not set
// int h; ///< height of pict, undefined when pict is not set
// int nb_colors; ///< number of colors in pict, undefined when pict is not set
//
(*
// * data+linesize for the bitmap of this subtitle.
// * can be set for text/ass as well once they where rendered
*)
// AVPicture pict;
// enum AVSubtitleType type;
//
// char *text; ///< 0 terminated plain UTF-8 text
//
(*
// * 0 terminated ASS/SSA compatible event line.
// * The presentation of this is unaffected by the other values in this
// * struct.
*)
// char *ass;
//
// int flags;
// } AVSubtitleRect;
//
// typedef struct AVSubtitle {
// uint16_t format; (* 0 = graphics *)
// uint32_t start_display_time; (* relative to packet pts, in ms *)
// uint32_t end_display_time; (* relative to packet pts, in ms *)
// unsigned num_rects;
// AVSubtitleRect **rects;
// int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
// } AVSubtitle;
//
(*
// * If c is NULL, returns the first registered codec,
// * if c is non-NULL, returns the next registered codec after c,
// * or NULL if c is the last one.
*)
// AVCodec *av_codec_next(const AVCodec *c);
function av_codec_next(const c: pAVCodec): pAVCodec; cdecl;
//
(*
// * Return the LIBAVCODEC_VERSION_INT constant.
*)
// unsigned avcodec_version(void);
//
(*
// * Return the libavcodec build-time configuration.
*)
// const char *avcodec_configuration(void);
//
(*
// * Return the libavcodec license.
*)
// const char *avcodec_license(void);
//
(*
// * Register the codec codec and initialize libavcodec.
// *
// * @warning either this function or avcodec_register_all() must be called
// * before any other libavcodec functions.
// *
// * @see avcodec_register_all()
*)
// void avcodec_register(AVCodec *codec);
//
(*
// * Register all the codecs, parsers and bitstream filters which were enabled at
// * configuration time. If you do not call this function you can select exactly
// * which formats you want to support, by using the individual registration
// * functions.
// *
// * @see avcodec_register
// * @see av_register_codec_parser
// * @see av_register_bitstream_filter
*)
// void avcodec_register_all(void);
procedure avcodec_register_all(); cdecl;
//
(*
// * Allocate an AVCodecContext and set its fields to default values. The
// * resulting struct can be deallocated by calling avcodec_close() on it followed
// * by av_free().
// *
// * @param codec if non-NULL, allocate private data and initialize defaults
// * for the given codec. It is illegal to then call avcodec_open2()
// * with a different codec.
// * If NULL, then the codec-specific defaults won't be initialized,
// * which may result in suboptimal default settings (this is
// * important mainly for encoders, e.g. libx264).
// *
// * @return An AVCodecContext filled with default values or NULL on failure.
// * @see avcodec_get_context_defaults
*)
// AVCodecContext *avcodec_alloc_context3(const AVCodec *codec);
function avcodec_alloc_context3(const codec: pAVCodec): pAVCodecContext; cdecl;
//
(*
// * Set the fields of the given AVCodecContext to default values corresponding
// * to the given codec (defaults may be codec-dependent).
// *
// * Do not call this function if a non-NULL codec has been passed
// * to avcodec_alloc_context3() that allocated this AVCodecContext.
// * If codec is non-NULL, it is illegal to call avcodec_open2() with a
// * different codec on this AVCodecContext.
*)
// int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec);
function avcodec_get_context_defaults3(s: pAVCodecContext; const codec: pAVCodec): Integer; cdecl;
//
(*
// * Get the AVClass for AVCodecContext. It can be used in combination with
// * AV_OPT_SEARCH_FAKE_OBJ for examining options.
// *
// * @see av_opt_find().
*)
// const AVClass *avcodec_get_class(void);
//
(*
// * Get the AVClass for AVFrame. It can be used in combination with
// * AV_OPT_SEARCH_FAKE_OBJ for examining options.
// *
// * @see av_opt_find().
*)
// const AVClass *avcodec_get_frame_class(void);
//
(*
// * Get the AVClass for AVSubtitleRect. It can be used in combination with
// * AV_OPT_SEARCH_FAKE_OBJ for examining options.
// *
// * @see av_opt_find().
*)
// const AVClass *avcodec_get_subtitle_rect_class(void);
//
(*
// * Copy the settings of the source AVCodecContext into the destination
// * AVCodecContext. The resulting destination codec context will be
// * unopened, i.e. you are required to call avcodec_open2() before you
// * can use this AVCodecContext to decode/encode video/audio data.
// *
// * @param dest target codec context, should be initialized with
// * avcodec_alloc_context3(NULL), but otherwise uninitialized
// * @param src source codec context
// * @return AVERROR() on error (e.g. memory allocation error), 0 on success
*)
// int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
//
(*
// * Allocate an AVFrame and set its fields to default values. The resulting
// * struct must be freed using avcodec_free_frame().
// *
// * @return An AVFrame filled with default values or NULL on failure.
// * @see avcodec_get_frame_defaults
*)
// AVFrame *avcodec_alloc_frame(void);
function avcodec_alloc_frame: pAVFrame; cdecl;
//
(*
// * Set the fields of the given AVFrame to default values.
// *
// * @param frame The AVFrame of which the fields should be set to default values.
*)
// void avcodec_get_frame_defaults(AVFrame *frame);
procedure avcodec_get_frame_defaults(frame: pAVFrame); cdecl;
//
(*
// * Free the frame and any dynamically allocated objects in it,
// * e.g. extended_data.
// *
// * @param frame frame to be freed. The pointer will be set to NULL.
// *
// * @warning this function does NOT free the data buffers themselves
// * (it does not know how, since they might have been allocated with
// * a custom get_buffer()).
*)
// void avcodec_free_frame(AVFrame **frame);
procedure avcodec_free_frame(Var frame:pAVFrame); cdecl;
//
(*
* Initialize the AVCodecContext to use the given AVCodec. Prior to using this
* function the context has to be allocated with avcodec_alloc_context3().
*
* The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
* avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
* retrieving a codec.
*
* @warning This function is not thread safe!
*
* @code
* avcodec_register_all();
* av_dict_set(&opts, "b", "2.5M", 0);
* codec = avcodec_find_decoder(AV_CODEC_ID_H264);
* if (!codec)
* exit(1);
*
* context = avcodec_alloc_context3(codec);
*
* if (avcodec_open2(context, codec, opts) < 0)
* exit(1);
* @endcode
*
* @param avctx The context to initialize.
* @param codec The codec to open this context for. If a non-NULL codec has been
* previously passed to avcodec_alloc_context3() or
* avcodec_get_context_defaults3() for this context, then this
* parameter MUST be either NULL or equal to the previously passed
* codec.
* @param options A dictionary filled with AVCodecContext and codec-private options.
* On return this object will be filled with options that were not found.
*
* @return zero on success, a negative value on error
* @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(),
* av_dict_set(), av_opt_find().
*)
// int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options);
function avcodec_open2(avctx: pAVCodecContext; const codec: pAVCodec; options: ppAVDictionary): Integer; cdecl;
(*
// * Close a given AVCodecContext and free all the data associated with it
// * (but not the AVCodecContext itself).
// *
// * Calling this function on an AVCodecContext that hasn't been opened will free
// * the codec-specific data allocated in avcodec_alloc_context3() /
// * avcodec_get_context_defaults3() with a non-NULL codec. Subsequent calls will
// * do nothing.
*)
// int avcodec_close(AVCodecContext *avctx);
function avcodec_close(avctx: pAVCodecContext): Integer; cdecl;
(*
// * Free all allocated data in the given subtitle struct.
// *
// * @param sub AVSubtitle to free.
*)
// void avsubtitle_free(AVSubtitle *sub);
//
(*
// * @}
*)
//
(*
// * @addtogroup lavc_packet
// * @{
*)
//
{$IFDEF FF_API_DESTRUCT_PACKET}
(*
* Default packet destructor.
* @deprecated use the AVBuffer API instead
*)
// attribute_deprecated
// void av_destruct_packet(AVPacket *pkt);
procedure av_destruct_packet(pkt: pAVPacket); cdecl;
{$ENDIF}
//
(*
// * Initialize optional fields of a packet with default values.
// *
// * Note, this does not touch the data and size members, which have to be
// * initialized separately.
// *
// * @param pkt packet
*)
// void av_init_packet(AVPacket *pkt);
procedure av_init_packet(pkt: pAVPacket); cdecl;
(*
// * Allocate the payload of a packet and initialize its fields with
// * default values.
// *
// * @param pkt packet
// * @param size wanted payload size
// * @return 0 if OK, AVERROR_xxx otherwise
*)
// int av_new_packet(AVPacket *pkt, int size);
function av_new_packet(pkt: pAVPacket; size: Integer): Integer; cdecl;
(*
// * Reduce packet size, correctly zeroing padding
// *
// * @param pkt packet
// * @param size new size
*)
// void av_shrink_packet(AVPacket *pkt, int size);
procedure av_shrink_packet(pkt: pAVPacket; size: Integer); cdecl;
(*
// * Increase packet size, correctly zeroing padding
// *
// * @param pkt packet
// * @param grow_by number of bytes by which to increase the size of the packet
*)
// int av_grow_packet(AVPacket *pkt, int grow_by);
function av_grow_packet(pkt: pAVPacket; grow_by: Integer): Integer; cdecl;
//
(*
* Initialize a reference-counted packet from av_malloc()ed data.
*
* @param pkt packet to be initialized. This function will set the data, size,
* buf and destruct fields, all others are left untouched.
* @param data Data allocated by av_malloc() to be used as packet data. If this
* function returns successfully, the data is owned by the underlying AVBuffer.
* The caller may not access the data through other means.
* @param size size of data in bytes, without the padding. I.e. the full buffer
* size is assumed to be size + FF_INPUT_BUFFER_PADDING_SIZE.
*
* @return 0 on success, a negative AVERROR on error
*)
// int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size);
function av_packet_from_data(pkt: pAVPacket; data: pByte; size: Integer): Integer; cdecl;
(*
// * @warning This is a hack - the packet memory allocation stuff is broken. The
// * packet is allocated if it was not really allocated.
*)
// int av_dup_packet(AVPacket *pkt);
function av_dup_packet(pkt: pAVPacket): Integer; cdecl;
//
(*
// * Copy packet, including contents
// *
// * @return 0 on success, negative AVERROR on fail
*)
// int av_copy_packet(AVPacket *dst, AVPacket *src);
function av_copy_packet(dst: pAVPacket; src: pAVPacket): Integer; cdecl;
(*
// * Copy packet side data
// *
// * @return 0 on success, negative AVERROR on fail
*)
// int av_copy_packet_side_data(AVPacket *dst, AVPacket *src);
function av_copy_packet_side_data(dst: pAVPacket; src: pAVPacket): Integer; cdecl;
(*
* Free a packet.
*
* @param pkt packet to free
*)
// void av_free_packet(AVPacket *pkt);
procedure av_free_packet(Var pkt: TAVPacket); cdecl;
(*
// * Allocate new information of a packet.
// *
// * @param pkt packet
// * @param type side information type
// * @param size side information size
// * @return pointer to fresh allocated data or NULL otherwise
*)
// uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
// int size);
function av_packet_new_side_data(pkt: pAVPacket; _type: TAVPacketSideDataType; size: Integer): pByte; cdecl;
(*
// * Shrink the already allocated side data buffer
// *
// * @param pkt packet
// * @param type side information type
// * @param size new side information size
// * @return 0 on success, < 0 on failure
*)
// int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size);
function av_packet_shrink_side_data(pkt: pAVPacket; _type: TAVPacketSideDataType; size: Integer): Integer; cdecl;
(*
// * Get side information from packet.
// *
// * @param pkt packet
// * @param type desired side information type
// * @param size pointer for side information size to store (optional)
// * @return pointer to data if present or NULL otherwise
*)
// uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
// int *size);
function av_packet_get_side_data(pkt: pAVPacket; _type: TAVPacketSideDataType; Var size: Integer): pByte; cdecl;
// int av_packet_merge_side_data(AVPacket *pkt);
function av_packet_merge_side_data(pkt: pAVPacket): Integer;
cdecl
//
// int av_packet_split_side_data(AVPacket *pkt);
function av_packet_split_side_data(pkt: pAVPacket): Integer;
cdecl;
//
(*
// * Convenience function to free all the side data stored.
// * All the other fields stay untouched.
// *
// * @param pkt packet
*)
// void av_packet_free_side_data(AVPacket *pkt);
procedure av_packet_free_side_data(pkt: pAVPacket); cdecl;
(*
// * Setup a new reference to the data described by a given packet
// *
// * If src is reference-counted, setup dst as a new reference to the
// * buffer in src. Otherwise allocate a new buffer in dst and copy the
// * data from src into it.
// *
// * All the other fields are copied from src.
// *
// * @see av_packet_unref
// *
// * @param dst Destination packet
// * @param src Source packet
// *
// * @return 0 on success, a negative AVERROR on error.
*)
// int av_packet_ref(AVPacket *dst, AVPacket *src);
function av_packet_ref(dst: pAVPacket; src: pAVPacket): Integer; cdecl;
//
(*
// * Wipe the packet.
// *
// * Unreference the buffer referenced by the packet and reset the
// * remaining packet fields to their default values.
// *
// * @param pkt The packet to be unreferenced.
*)
// void av_packet_unref(AVPacket *pkt);
procedure av_packet_unref(pkt: pAVPacket); cdecl;
(*
// * Move every field in src to dst and reset src.
// *
// * @see av_packet_unref
// *
// * @param src Source packet, will be reset
// * @param dst Destination packet
*)
// void av_packet_move_ref(AVPacket *dst, AVPacket *src);
procedure av_packet_move_ref(dst: pAVPacket; src: pAVPacket); cdecl;
(*
// * Copy only "properties" fields from src to dst.
// *
// * Properties for the purpose of this function are all the fields
// * beside those related to the packet data (buf, data, size)
// *
// * @param dst Destination packet
// * @param src Source packet
// *
// * @return 0 on success AVERROR on failure.
// *
*)
// int av_packet_copy_props(AVPacket *dst, const AVPacket *src);
function av_packet_copy_props(dst: pAVPacket; const src: pAVPacket): Integer; cdecl;
(*
// * Find a registered decoder with a matching codec ID.
// *
// * @param id AVCodecID of the requested decoder
// * @return A decoder if one was found, NULL otherwise.
*)
// AVCodec *avcodec_find_decoder(enum AVCodecID id);
function avcodec_find_decoder(id: TAVCodecID): pAVCodec; cdecl;
//
(*
// * Find a registered decoder with the specified name.
// *
// * @param name name of the requested decoder
// * @return A decoder if one was found, NULL otherwise.
*)
// AVCodec *avcodec_find_decoder_by_name(const char *name);
//
// #if FF_API_GET_BUFFER
// attribute_deprecated int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
// attribute_deprecated void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
// attribute_deprecated int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
// #endif
//
(*
// * The default callback for AVCodecContext.get_buffer2(). It is made public so
// * it can be called by custom get_buffer2() implementations for decoders without
// * CODEC_CAP_DR1 set.
*)
// int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags);
//
(*
// * Return the amount of padding in pixels which the get_buffer callback must
// * provide around the edge of the image for codecs which do not have the
// * CODEC_FLAG_EMU_EDGE flag.
// *
// * @return Required padding in pixels.
*)
// unsigned avcodec_get_edge_width(void);
//
(*
// * Modify width and height values so that they will result in a memory
// * buffer that is acceptable for the codec if you do not use any horizontal
// * padding.
// *
// * May only be used if a codec with CODEC_CAP_DR1 has been opened.
// * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
// * according to avcodec_get_edge_width() before.
*)
// void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
//
(*
// * Modify width and height values so that they will result in a memory
// * buffer that is acceptable for the codec if you also ensure that all
// * line sizes are a multiple of the respective linesize_align[i].
// *
// * May only be used if a codec with CODEC_CAP_DR1 has been opened.
// * If CODEC_FLAG_EMU_EDGE is not set, the dimensions must have been increased
// * according to avcodec_get_edge_width() before.
*)
// void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
// int linesize_align[AV_NUM_DATA_POINTERS]);
//
(*
// * Converts AVChromaLocation to swscale x/y chroma position.
// *
// * The positions represent the chroma (0,0) position in a coordinates system
// * with luma (0,0) representing the origin and luma(1,1) representing 256,256
// *
// * @param xpos horizontal chroma sample position
// * @param ypos vertical chroma sample position
*)
// int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos);
//
(*
// * Converts swscale x/y chroma position to AVChromaLocation.
// *
// * The positions represent the chroma (0,0) position in a coordinates system
// * with luma (0,0) representing the origin and luma(1,1) representing 256,256
// *
// * @param xpos horizontal chroma sample position
// * @param ypos vertical chroma sample position
*)
// enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos);
//
// #if FF_API_OLD_DECODE_AUDIO
(*
* Wrapper function which calls avcodec_decode_audio4.
*
* @deprecated Use avcodec_decode_audio4 instead.
*
* Decode the audio frame of size avpkt->size from avpkt->data into samples.
* Some decoders may support multiple frames in a single AVPacket, such
* decoders would then just decode the first frame. In this case,
* avcodec_decode_audio3 has to be called again with an AVPacket that contains
* the remaining data in order to decode the second frame etc.
* If no frame
* could be outputted, frame_size_ptr is zero. Otherwise, it is the
* decompressed frame size in bytes.
*
* @warning You must set frame_size_ptr to the allocated size of the
* output buffer before calling avcodec_decode_audio3().
*
* @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
* the actual read bytes because some optimized bitstream readers read 32 or 64
* bits at once and could read over the end.
*
* @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
* no overreading happens for damaged MPEG streams.
*
* @warning You must not provide a custom get_buffer() when using
* avcodec_decode_audio3(). Doing so will override it with
* avcodec_default_get_buffer. Use avcodec_decode_audio4() instead,
* which does allow the application to provide a custom get_buffer().
*
* @note You might have to align the input buffer avpkt->data and output buffer
* samples. The alignment requirements depend on the CPU: On some CPUs it isn't
* necessary at all, on others it won't work at all if not aligned and on others
* it will work but it will have an impact on performance.
*
* In practice, avpkt->data should have 4 byte alignment at minimum and
* samples should be 16 byte aligned unless the CPU doesn't need it
* (AltiVec and SSE do).
*
* @note Codecs which have the CODEC_CAP_DELAY capability set have a delay
* between input and output, these need to be fed with avpkt->data=NULL,
* avpkt->size=0 at the end to return the remaining frames.
*
* @param avctx the codec context
* @param[out] samples the output buffer, sample type in avctx->sample_fmt
* If the sample format is planar, each channel plane will
* be the same size, with no padding between channels.
* @param[in,out] frame_size_ptr the output buffer size in bytes
* @param[in] avpkt The input AVPacket containing the input buffer.
* You can create such packet with av_init_packet() and by then setting
* data and size, some decoders might in addition need other fields.
* All decoders are designed to use the least fields possible though.
* @return On error a negative value is returned, otherwise the number of bytes
* used or zero if no frame data was decompressed (used) from the input AVPacket.
*)
// attribute_deprecated int avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
// int *frame_size_ptr,
// AVPacket *avpkt);
// #endif
//
(*
* Decode the audio frame of size avpkt->size from avpkt->data into frame.
*
* Some decoders may support multiple frames in a single AVPacket. Such
* decoders would then just decode the first frame and the return value would be
* less than the packet size. In this case, avcodec_decode_audio4 has to be
* called again with an AVPacket containing the remaining data in order to
* decode the second frame, etc... Even if no frames are returned, the packet
* needs to be fed to the decoder with remaining data until it is completely
* consumed or an error occurs.
*
* Some decoders (those marked with CODEC_CAP_DELAY) have a delay between input
* and output. This means that for some packets they will not immediately
* produce decoded output and need to be flushed at the end of decoding to get
* all the decoded data. Flushing is done by calling this function with packets
* with avpkt->data set to NULL and avpkt->size set to 0 until it stops
* returning samples. It is safe to flush even those decoders that are not
* marked with CODEC_CAP_DELAY, then no samples will be returned.
*
* @warning The input buffer, avpkt->data must be FF_INPUT_BUFFER_PADDING_SIZE
* larger than the actual read bytes because some optimized bitstream
* readers read 32 or 64 bits at once and could read over the end.
*
* @param avctx the codec context
* @param[out] frame The AVFrame in which to store decoded audio samples.
* The decoder will allocate a buffer for the decoded frame by
* calling the AVCodecContext.get_buffer2() callback.
* When AVCodecContext.refcounted_frames is set to 1, the frame is
* reference counted and the returned reference belongs to the
* caller. The caller must release the frame using av_frame_unref()
* when the frame is no longer needed. The caller may safely write
* to the frame if av_frame_is_writable() returns 1.
* When AVCodecContext.refcounted_frames is set to 0, the returned
* reference belongs to the decoder and is valid only until the
* next call to this function or until closing or flushing the
* decoder. The caller may not write to it.
* @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is
* non-zero. Note that this field being set to zero
* does not mean that an error has occurred. For
* decoders with CODEC_CAP_DELAY set, no given decode
* call is guaranteed to produce a frame.
* @param[in] avpkt The input AVPacket containing the input buffer.
* At least avpkt->data and avpkt->size should be set. Some
* decoders might also require additional fields to be set.
* @return A negative error code is returned if an error occurred during
* decoding, otherwise the number of bytes consumed from the input
* AVPacket is returned.
*)
// int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame,
// int *got_frame_ptr, const AVPacket *avpkt);
//
(*
* Decode the video frame of size avpkt->size from avpkt->data into picture.
* Some decoders may support multiple frames in a single AVPacket, such
* decoders would then just decode the first frame.
*
* @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
* the actual read bytes because some optimized bitstream readers read 32 or 64
* bits at once and could read over the end.
*
* @warning The end of the input buffer buf should be set to 0 to ensure that
* no overreading happens for damaged MPEG streams.
*
* @note Codecs which have the CODEC_CAP_DELAY capability set have a delay
* between input and output, these need to be fed with avpkt->data=NULL,
* avpkt->size=0 at the end to return the remaining frames.
*
* @param avctx the codec context
* @param[out] picture The AVFrame in which the decoded video frame will be stored.
* Use av_frame_alloc() to get an AVFrame. The codec will
* allocate memory for the actual bitmap by calling the
* AVCodecContext.get_buffer2() callback.
* When AVCodecContext.refcounted_frames is set to 1, the frame is
* reference counted and the returned reference belongs to the
* caller. The caller must release the frame using av_frame_unref()
* when the frame is no longer needed. The caller may safely write
* to the frame if av_frame_is_writable() returns 1.
* When AVCodecContext.refcounted_frames is set to 0, the returned
* reference belongs to the decoder and is valid only until the
* next call to this function or until closing or flushing the
* decoder. The caller may not write to it.
*
* @param[in] avpkt The input AVPacket containing the input buffer.
* You can create such packet with av_init_packet() and by then setting
* data and size, some decoders might in addition need other fields like
* flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
* fields possible.
* @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
* @return On error a negative value is returned, otherwise the number of bytes
* used or zero if no frame could be decompressed.
*)
// int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
// int *got_picture_ptr,
// const AVPacket *avpkt);
function avcodec_decode_video2( //
avctx: pAVCodecContext; // AVCodecContext *avctx
picture: pAVFrame; // AVFrame *picture
Var got_picture_ptr: Integer; // int *got_picture_ptr
const avpkt: pAVPacket // const AVPacket *avpkt
): Integer; cdecl;
(*
* 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.
*
* Some decoders (those marked with CODEC_CAP_DELAY) have a delay between input
* and output. This means that for some packets they will not immediately
* produce decoded output and need to be flushed at the end of decoding to get
* all the decoded data. Flushing is done by calling this function with packets
* with avpkt->data set to NULL and avpkt->size set to 0 until it stops
* returning subtitles. It is safe to flush even those decoders that are not
* marked with CODEC_CAP_DELAY, then no subtitles will be returned.
*
* @param avctx the codec context
* @param[out] sub The AVSubtitle in which the decoded subtitle will be stored, must be
freed with avsubtitle_free if *got_sub_ptr is set.
* @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
* @param[in] avpkt The input AVPacket containing the input buffer.
*)
// int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
// int *got_sub_ptr,
// AVPacket *avpkt);
//
Type
TAVPictureStructure = ( //
AV_PICTURE_STRUCTURE_UNKNOWN, // < unknown
AV_PICTURE_STRUCTURE_TOP_FIELD, // < coded as top field
AV_PICTURE_STRUCTURE_BOTTOM_FIELD, // < coded as bottom field
AV_PICTURE_STRUCTURE_FRAME // < coded as frame
);
pAVCodecParserContext = ^TAVCodecParserContext;
pAVCodecParser = ^TAVCodecParser;
TAVCodecParserContext = record
priv_data: pointer;
parser: pAVCodecParser;
frame_offset: int64_t; (* offset of the current frame *)
cur_offset: int64_t; (* current offset
(* (incremented by each av_parser_parse()) *)
next_frame_offset: int64_t; (* offset of the next frame *)
(* video info *)
pict_type: Integer; (* 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: Integer; (* XXX: Put it back in AVCodecContext. *)
pts: int64_t; (* pts of the current frame *)
dts: int64_t; (* dts of the current frame *)
(* private data *)
last_pts: int64_t;
last_dts: int64_t;
fetch_timestamp: Integer;
cur_frame_start_index: Integer;
cur_frame_offset: array [0 .. AV_PARSER_PTS_NB - 1] of int64_t;
cur_frame_pts: array [0 .. AV_PARSER_PTS_NB - 1] of int64_t;
cur_frame_dts: array [0 .. AV_PARSER_PTS_NB - 1] of int64_t;
flags: Integer;
offset: int64_t;
/// < byte offset from starting packet start
cur_frame_end: array [0 .. AV_PARSER_PTS_NB - 1] of int64_t;
//
(*
* Set by parser to 1 for key frames and 0 for non-key frames.
* It is initialized to -1, so if the parser doesn't set this flag,
* old-style fallback using AV_PICTURE_TYPE_I picture type as key frames
* will be used.
*)
key_frame: Integer;
(*
* Time difference in stream time base units from the pts of this
* packet to the point at which the output from the decoder has converged
* independent from the availability of previous frames. That is, the
* frames are virtually identical no matter if decoding started from
* the very first frame or from this keyframe.
* Is AV_NOPTS_VALUE if unknown.
* This field is not the display duration of the current frame.
* This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
* set.
*
* The purpose of this field is to allow seeking in streams that have no
* keyframes in the conventional sense. It corresponds to the
* recovery point SEI in H.264 and match_time_delta in NUT. It is also
* essential for some types of subtitle streams to ensure that all
* subtitles are correctly displayed after seeking.
*)
convergence_duration: int64_t;
// 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: Integer;
(*
* 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: Integer;
(*
* 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: Integer;
(*
* Position of the packet in file.
*
* Analogous to cur_frame_pts/dts
*)
cur_frame_pos: array [0 .. AV_PARSER_PTS_NB - 1] of int64_t;
(*
* Byte position of currently parsed frame in stream.
*)
pos: int64_t;
(*
* Previous frame byte position.
*)
last_pos: int64_t;
(*
* Duration of the current frame.
* For audio, this is in units of 1 / AVCodecContext.sample_rate.
* For all other types, this is in units of AVCodecContext.time_base.
*)
duration: Integer;
field_order: TAVFieldOrder;
(*
* Indicate whether a picture is coded as a frame, top field or bottom field.
*
* For example, H.264 field_pic_flag equal to 0 corresponds to
* AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag
* equal to 1 and bottom_field_flag equal to 0 corresponds to
* AV_PICTURE_STRUCTURE_TOP_FIELD.
*)
picture_structure: TAVPictureStructure;
(*
* Picture number incremented in presentation or output order.
* This field may be reinitialized at the first picture of a new sequence.
*
* For example, this corresponds to H.264 PicOrderCnt.
*)
output_picture_number: Integer;
end;
ppByte = ^pByte;
TAVCodecParser = record
codec_ids: array [0 .. 4] of Integer; (* several codec IDs are permitted *)
priv_data_size: Integer;
// int (*parser_init)(AVCodecParserContext *s);
parser_init: function(s: pAVCodecParserContext): Integer; cdecl;
// int (*parser_parse)(AVCodecParserContext *s,
// AVCodecContext *avctx,
// const uint8_t **poutbuf, int *poutbuf_size,
// const uint8_t *buf, int buf_size);
parser_parse: function(s: pAVCodecParserContext; avctx: pAVCodecContext; const poutbuf: ppByte; poutbuf_size: PInteger;
const buf: pByte; buf_size: Integer): Integer; cdecl;
// void (*parser_close)(AVCodecParserContext *s);
parser_close: procedure(s: pAVCodecParserContext); cdecl;
// int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
split: function(avctx: pAVCodecContext; const buf: pByte; buf_size: Integer): Integer; cdecl;
next: pAVCodecParser;
end;
// AVCodecParser *av_parser_next(AVCodecParser *c);
//
// void av_register_codec_parser(AVCodecParser *parser);
// AVCodecParserContext *av_parser_init(int codec_id);
//
(*
* Parse a packet.
*
* @param s parser context.
* @param avctx codec context.
* @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
* @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
* @param buf input buffer.
* @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
* @param pts input presentation timestamp.
* @param dts input decoding timestamp.
* @param pos input byte position in stream.
* @return the number of bytes of the input bitstream used.
*
* Example:
* @code
* while(in_len){
* len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
* in_data, in_len,
* pts, dts, pos);
* in_data += len;
* in_len -= len;
*
* if(size)
* decode_frame(data, size);
* }
* @endcode
*)
// int av_parser_parse2(AVCodecParserContext *s,
// AVCodecContext *avctx,
// uint8_t **poutbuf, int *poutbuf_size,
// const uint8_t *buf, int buf_size,
// int64_t pts, int64_t dts,
// int64_t pos);
//
(*
// * @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed
// * @deprecated use AVBitStreamFilter
*)
// int av_parser_change(AVCodecParserContext *s,
// AVCodecContext *avctx,
// uint8_t **poutbuf, int *poutbuf_size,
// const uint8_t *buf, int buf_size, int keyframe);
// void av_parser_close(AVCodecParserContext *s);
//
(*
* Find a registered encoder with a matching codec ID.
*
* @param id AVCodecID of the requested encoder
* @return An encoder if one was found, NULL otherwise.
*)
// AVCodec *avcodec_find_encoder(enum AVCodecID id);
//
(*
* Find a registered encoder with the specified name.
*
* @param name name of the requested encoder
* @return An encoder if one was found, NULL otherwise.
*)
// AVCodec *avcodec_find_encoder_by_name(const char *name);
//
// #if FF_API_OLD_ENCODE_AUDIO
(*
* Encode an audio frame from samples into buf.
*
* @deprecated Use avcodec_encode_audio2 instead.
*
* @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
* However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user
* will know how much space is needed because it depends on the value passed
* in buf_size as described below. In that case a lower value can be used.
*
* @param avctx the codec context
* @param[out] buf the output buffer
* @param[in] buf_size the output buffer size
* @param[in] samples the input buffer containing the samples
* The number of samples read from this buffer is frame_size*channels,
* both of which are defined in avctx.
* For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of
* samples read from samples is equal to:
* buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id))
* This also implies that av_get_bits_per_sample() must not return 0 for these
* codecs.
* @return On error a negative value is returned, on success zero or the number
* of bytes used to encode the data read from the input buffer.
*)
// int attribute_deprecated avcodec_encode_audio(AVCodecContext *avctx,
// uint8_t *buf, int buf_size,
// const short *samples);
// #endif
//
(*
* Encode a frame of audio.
*
* Takes input samples from frame and writes the next output packet, if
* available, to avpkt. The output packet does not necessarily contain data for
* the most recent frame, as encoders can delay, split, and combine input frames
* internally as needed.
*
* @param avctx codec context
* @param avpkt output AVPacket.
* The user can supply an output buffer by setting
* avpkt->data and avpkt->size prior to calling the
* function, but if the size of the user-provided data is not
* large enough, encoding will fail. 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
*)
// int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt,
// const AVFrame *frame, int *got_packet_ptr);
//
// #if FF_API_OLD_ENCODE_VIDEO
(*
* @deprecated use avcodec_encode_video2() instead.
*
* Encode a video frame from pict into buf.
* The input picture should be
* stored using a specific format, namely avctx.pix_fmt.
*
* @param avctx the codec context
* @param[out] buf the output buffer for the bitstream of encoded frame
* @param[in] buf_size the size of the output buffer in bytes
* @param[in] pict the input picture to encode
* @return On error a negative value is returned, on success zero or the number
* of bytes used from the output buffer.
*)
// attribute_deprecated
// int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
// const AVFrame *pict);
// #endif
//
(*
* Encode a frame of video.
*
* Takes input raw video data from frame and writes the next output packet, if
* available, to avpkt. The output packet does not necessarily contain data for
* the most recent frame, as encoders can delay and reorder input frames
* internally as needed.
*
* @param avctx codec context
* @param avpkt output AVPacket.
* The user can supply an output buffer by setting
* avpkt->data and avpkt->size prior to calling the
* function, but if the size of the user-provided data is not
* large enough, encoding will fail. All other AVPacket fields
* will be reset by the encoder using av_init_packet(). If
* avpkt->data is NULL, the encoder will allocate it.
* The encoder will set avpkt->size to the size of the
* output packet. The returned data (if any) belongs to the
* caller, he is responsible for freeing it.
*
* If this function fails or produces no output, avpkt will be
* freed using av_free_packet() (i.e. avpkt->destruct will be
* called to free the user supplied buffer).
* @param[in] frame AVFrame containing the raw video data to be encoded.
* May be NULL when flushing an encoder that has the
* CODEC_CAP_DELAY capability set.
* @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
* output packet is non-empty, and to 0 if it is
* empty. If the function returns an error, the
* packet can be assumed to be invalid, and the
* value of got_packet_ptr is undefined and should
* not be used.
* @return 0 on success, negative error code on failure
*)
// int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
// const AVFrame *frame, int *got_packet_ptr);
//
// int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
// const AVSubtitle *sub);
//
// #if FF_API_AVCODEC_RESAMPLE
(*
* @defgroup lavc_resample Audio resampling
* @ingroup libavc
* @deprecated use libswresample instead
*
* @{
*)
// struct ReSampleContext;
// struct AVResampleContext;
//
// typedef struct ReSampleContext ReSampleContext;
//
(*
* Initialize audio resampling context.
*
* @param output_channels number of output channels
* @param input_channels number of input channels
* @param output_rate output sample rate
* @param input_rate input sample rate
* @param sample_fmt_out requested output sample format
* @param sample_fmt_in input sample format
* @param filter_length length of each FIR filter in the filterbank relative to the cutoff frequency
* @param log2_phase_count log2 of the number of entries in the polyphase filterbank
* @param linear if 1 then the used FIR filter will be linearly interpolated
between the 2 closest, if 0 the closest will be used
* @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
* @return allocated ReSampleContext, NULL if error occurred
*)
// attribute_deprecated
// ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
// int output_rate, int input_rate,
// enum AVSampleFormat sample_fmt_out,
// enum AVSampleFormat sample_fmt_in,
// int filter_length, int log2_phase_count,
// int linear, double cutoff);
//
// attribute_deprecated
// int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
//
(*
* Free resample context.
*
* @param s a non-NULL pointer to a resample context previously
* created with av_audio_resample_init()
*)
// attribute_deprecated
// void audio_resample_close(ReSampleContext *s);
//
//
(*
* Initialize an audio resampler.
* Note, if either rate is not an integer then simply scale both rates up so they are.
* @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
* @param log2_phase_count log2 of the number of entries in the polyphase filterbank
* @param linear If 1 then the used FIR filter will be linearly interpolated
between the 2 closest, if 0 the closest will be used
* @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
*)
// attribute_deprecated
// struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
//
(*
* Resample an array of samples using a previously configured context.
* @param src an array of unconsumed samples
* @param consumed the number of samples of src which have been consumed are returned here
* @param src_size the number of unconsumed samples available
* @param dst_size the amount of space in samples available in dst
* @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
* @return the number of samples written in dst or -1 if an error occurred
*)
// attribute_deprecated
// int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
//
//
(*
* Compensate samplerate/timestamp drift. The compensation is done by changing
* the resampler parameters, so no audible clicks or similar distortions occur
* @param compensation_distance distance in output samples over which the compensation should be performed
* @param sample_delta number of output samples which should be output less
*
* example: av_resample_compensate(c, 10, 500)
* here instead of 510 samples only 500 samples would be output
*
* note, due to rounding the actual compensation might be slightly different,
* especially if the compensation_distance is large and the in_rate used during init is small
*)
// attribute_deprecated
// void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
// attribute_deprecated
// void av_resample_close(struct AVResampleContext *c);
//
(*
* Allocate memory for the pixels of a picture and setup the AVPicture
* fields for it.
*
* Call avpicture_free() to free it.
*
* @param picture the picture structure to be filled in
* @param pix_fmt the pixel format of the picture
* @param width the width of the picture
* @param height the height of the picture
* @return zero if successful, a negative error code otherwise
*
* @see av_image_alloc(), avpicture_fill()
*)
// int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height);
//
(*
* Free a picture previously allocated by avpicture_alloc().
* The data buffer used by the AVPicture is freed, but the AVPicture structure
* itself is not.
*
* @param picture the AVPicture to be freed
*)
// void avpicture_free(AVPicture *picture);
//
(*
* Setup the picture fields based on the specified image parameters
* and the provided image data buffer.
*
* The picture fields are filled in by using the image data buffer
* pointed to by ptr.
*
* If ptr is NULL, the function will fill only the picture linesize
* array and return the required size for the image buffer.
*
* To allocate an image buffer and fill the picture data in one call,
* use avpicture_alloc().
*
* @param picture the picture to be filled in
* @param ptr buffer where the image data is stored, or NULL
* @param pix_fmt the pixel format of the image
* @param width the width of the image in pixels
* @param height the height of the image in pixels
* @return the size in bytes required for src, a negative error code
* in case of failure
*
* @see av_image_fill_arrays()
*)
// int avpicture_fill(AVPicture *picture, const uint8_t *ptr,
// enum AVPixelFormat pix_fmt, int width, int height);
function avpicture_fill(picture: pAVPicture; const ptr: pByte; pix_fmt: TAVPixelFormat; width: Integer; height: Integer)
: Integer; cdecl;
//
(*
* Copy pixel data from an AVPicture into a buffer.
*
* avpicture_get_size() can be used to compute the required size for
* the buffer to fill.
*
* @param src source picture with filled data
* @param pix_fmt picture pixel format
* @param width picture width
* @param height picture height
* @param dest destination buffer
* @param dest_size destination buffer size in bytes
* @return the number of bytes written to dest, or a negative value
* (error code) on error, for example if the destination buffer is not
* big enough
*
* @see av_image_copy_to_buffer()
*)
// int avpicture_layout(const AVPicture *src, enum AVPixelFormat pix_fmt,
// int width, int height,
// unsigned char *dest, int dest_size);
//
(*
* Calculate the size in bytes that a picture of the given width and height
* would occupy if stored in the given picture format.
*
* @param pix_fmt picture pixel format
* @param width picture width
* @param height picture height
* @return the computed picture buffer size or a negative error code
* in case of error
*
* @see av_image_get_buffer_size().
*)
// int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height);
function avpicture_get_size(pix_fmt: TAVPixelFormat; width: Integer; height: Integer): Integer; cdecl;
// #if FF_API_DEINTERLACE
(*
// * deinterlace - if not supported return -1
// *
// * @deprecated - use yadif (in libavfilter) instead
*)
// attribute_deprecated
// int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
// enum AVPixelFormat pix_fmt, int width, int height);
// #endif
(*
* Copy image src to dst. Wraps av_image_copy().
*)
// void av_picture_copy(AVPicture *dst, const AVPicture *src,
// enum AVPixelFormat pix_fmt, int width, int height);
//
(*
* Crop image top and left side.
*)
// int av_picture_crop(AVPicture *dst, const AVPicture *src,
// enum AVPixelFormat pix_fmt, int top_band, int left_band);
//
(*
* Pad image.
*)
// int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt,
// int padtop, int padbottom, int padleft, int padright, int *color);
//
(*
* Utility function to access log2_chroma_w log2_chroma_h from
* the pixel format AVPixFmtDescriptor.
*
* This function asserts that pix_fmt is valid. See av_pix_fmt_get_chroma_sub_sample
* for one that returns a failure code and continues in case of invalid
* pix_fmts.
*
* @param[in] pix_fmt the pixel format
* @param[out] h_shift store log2_chroma_w
* @param[out] v_shift store log2_chroma_h
*
* @see av_pix_fmt_get_chroma_sub_sample
*)
//
// void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift);
//
(*
* Return a value representing the fourCC code associated to the
* pixel format pix_fmt, or 0 if no associated fourCC code can be
* found.
*)
// unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt);
//
// #define FF_LOSS_RESOLUTION $0001 (**< loss due to resolution change *)
// #define FF_LOSS_DEPTH $0002 (**< loss due to color depth change *)
// #define FF_LOSS_COLORSPACE $0004 (**< loss due to color space conversion *)
// #define FF_LOSS_ALPHA $0008 (**< loss of alpha bits *)
// #define FF_LOSS_COLORQUANT $0010 (**< loss due to color quantization *)
// #define 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).
*)
// int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
// int has_alpha);
//
(*
* Find the best pixel format to convert to given a certain source pixel
* format. When converting from one pixel format to another, information loss
* may occur. For example, when converting from RGB24 to GRAY, the color
* information will be lost. Similarly, other losses occur when converting from
* some formats to other formats. avcodec_find_best_pix_fmt_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 AV_PIX_FMT_NONE terminated array of pixel formats to choose from
* @param[in] src_pix_fmt source pixel format
* @param[in] has_alpha Whether the source pixel format alpha channel is used.
* @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
* @return The best pixel format to convert to or -1 if none was found.
*)
// enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list,
// enum AVPixelFormat src_pix_fmt,
// int has_alpha, int *loss_ptr);
//
(*
* 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 AV_PIX_FMT_NONE the other pixel format (if valid) will be
* returned.
*
* @code
* src_pix_fmt = AV_PIX_FMT_YUV420P;
* dst_pix_fmt1= AV_PIX_FMT_RGB24;
* dst_pix_fmt2= AV_PIX_FMT_GRAY8;
* dst_pix_fmt3= AV_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.
*)
// enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
// enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
//
// attribute_deprecated
// #if AV_HAVE_INCOMPATIBLE_LIBAV_ABI
// enum AVPixelFormat avcodec_find_best_pix_fmt2(const enum AVPixelFormat *pix_fmt_list,
// enum AVPixelFormat src_pix_fmt,
// int has_alpha, int *loss_ptr);
// #else
// enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
// enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
// #endif
//
//
// enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
//
(*
// * @}
*)
//
// #if FF_API_SET_DIMENSIONS
(*
// * @deprecated this function is not supposed to be used from outside of lavc
*)
// attribute_deprecated
// void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
// #endif
//
(*
// * Put a string representing the codec tag codec_tag in buf.
// *
// * @param buf_size size in bytes of buf
// * @return the length of the string that would have been generated if
// * enough space had been available, excluding the trailing null
*)
// size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
//
// void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
//
(*
// * Return a name for the specified profile, if available.
// *
// * @param codec the codec that is searched for the given profile
// * @param profile the profile value for which a name is requested
// * @return A name for the profile if found, NULL otherwise.
*)
// const char *av_get_profile_name(const AVCodec *codec, int profile);
//
// int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
// int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
/// /FIXME func typedef
//
(*
// * Fill AVFrame audio data and linesize pointers.
// *
// * The buffer buf must be a preallocated buffer with a size big enough
// * to contain the specified samples amount. The filled AVFrame data
// * pointers will point to this buffer.
// *
// * AVFrame extended_data channel pointers are allocated if necessary for
// * planar audio.
// *
// * @param frame the AVFrame
// * frame->nb_samples must be set prior to calling the
// * function. This function fills in frame->data,
// * frame->extended_data, frame->linesize[0].
// * @param nb_channels channel count
// * @param sample_fmt sample format
// * @param buf buffer to use for frame data
// * @param buf_size size of buffer
// * @param align plane size sample alignment (0 = default)
// * @return >=0 on success, negative error code on failure
// * @todo return the size in bytes required to store the samples in
// * case of success, at the next libavutil bump
*)
// int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
// enum AVSampleFormat sample_fmt, const uint8_t *buf,
// int buf_size, int align);
//
(*
// * Reset the internal decoder state / flush internal buffers. Should be called
// * e.g. when seeking or when switching to a different stream.
// *
// * @note when refcounted frames are not used (i.e. avctx->refcounted_frames is 0),
// * this invalidates the frames previously returned from the decoder. When
// * refcounted frames are used, the decoder just releases any references it might
// * keep internally, but the caller's reference remains valid.
*)
// void avcodec_flush_buffers(AVCodecContext *avctx);
//
(*
// * Return codec bits per sample.
// *
// * @param[in] codec_id the codec
// * @return Number of bits per sample or zero if unknown for the given codec.
*)
// int av_get_bits_per_sample(enum AVCodecID codec_id);
//
(*
// * Return 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
*)
// enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be);
//
(*
// * Return codec bits per sample.
// * Only return non-zero if the bits per sample is exactly correct, not an
// * approximation.
// *
// * @param[in] codec_id the codec
// * @return Number of bits per sample or zero if unknown for the given codec.
*)
// int av_get_exact_bits_per_sample(enum AVCodecID codec_id);
//
(*
// * Return audio frame duration.
// *
// * @param avctx codec context
// * @param frame_bytes size of the frame, or 0 if unknown
// * @return frame duration, in samples, if known. 0 if not able to
// * determine.
*)
// int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes);
//
//
// typedef struct AVBitStreamFilterContext {
// void *priv_data;
// struct AVBitStreamFilter *filter;
// AVCodecParserContext *parser;
// struct AVBitStreamFilterContext *next;
// } AVBitStreamFilterContext;
//
//
// typedef struct AVBitStreamFilter {
// const char *name;
// int priv_data_size;
// int (*filter)(AVBitStreamFilterContext *bsfc,
// AVCodecContext *avctx, const char *args,
// uint8_t **poutbuf, int *poutbuf_size,
// const uint8_t *buf, int buf_size, int keyframe);
// void (*close)(AVBitStreamFilterContext *bsfc);
// struct AVBitStreamFilter *next;
// } AVBitStreamFilter;
//
(*
// * Register a bitstream filter.
// *
// * The filter will be accessible to the application code through
// * av_bitstream_filter_next() or can be directly initialized with
// * av_bitstream_filter_init().
// *
// * @see avcodec_register_all()
*)
// void av_register_bitstream_filter(AVBitStreamFilter *bsf);
//
(*
// * Create and initialize a bitstream filter context given a bitstream
// * filter name.
// *
// * The returned context must be freed with av_bitstream_filter_close().
// *
// * @param name the name of the bitstream filter
// * @return a bitstream filter context if a matching filter was found
// * and successfully initialized, NULL otherwise
*)
// AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
(*
// * Filter bitstream.
// *
// * This function filters the buffer buf with size buf_size, and places the
// * filtered buffer in the buffer pointed to by poutbuf.
// *
// * The output buffer must be freed by the caller.
// *
// * @param bsfc bitstream filter context created by av_bitstream_filter_init()
// * @param avctx AVCodecContext accessed by the filter, may be NULL.
// * If specified, this must point to the encoder context of the
// * output stream the packet is sent to.
// * @param args arguments which specify the filter configuration, may be NULL
// * @param poutbuf pointer which is updated to point to the filtered buffer
// * @param poutbuf_size pointer which is updated to the filtered buffer size in bytes
// * @param buf buffer containing the data to filter
// * @param buf_size size in bytes of buf
// * @param keyframe set to non-zero if the buffer to filter corresponds to a key-frame packet data
// * @return >= 0 in case of success, or a negative error code in case of failure
// *
// * If the return value is positive, an output buffer is allocated and
// * is availble in *poutbuf, and is distinct from the input buffer.
// *
// * If the return value is 0, the output buffer is not allocated and
// * should be considered identical to the input buffer, or in case
// * *poutbuf was set it points to the input buffer (not necessarily to
// * its starting address).
*)
// int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
// AVCodecContext *avctx, const char *args,
// uint8_t **poutbuf, int *poutbuf_size,
// const uint8_t *buf, int buf_size, int keyframe);
//
(*
// * Release bitstream filter context.
// *
// * @param bsf the bitstream filter context created with
// * av_bitstream_filter_init(), can be NULL
*)
// void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
//
(*
// * If f is NULL, return the first registered bitstream filter,
// * if f is non-NULL, return the next registered bitstream filter
// * after f, or NULL if f is the last one.
// *
// * This function can be used to iterate over all registered bitstream
// * filters.
*)
// AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
//
(* memory *)
//
(*
// * Same behaviour av_fast_malloc but the buffer has additional
// * FF_INPUT_BUFFER_PADDING_SIZE at the end which 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.
*)
// void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
//
(*
// * Same behaviour av_fast_padded_malloc except that buffer will always
// * be 0-initialized after call.
*)
// void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size);
//
(*
// * Encode extradata length to a buffer. Used by xiph codecs.
// *
// * @param s buffer to write to; must be at least (v/255+1) bytes long
// * @param v size of extradata in bytes
// * @return number of bytes written to the buffer.
*)
// unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
//
// #if FF_API_MISSING_SAMPLE
(*
// * 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.
// * @deprecated Use avpriv_report_missing_feature() instead.
*)
// attribute_deprecated
// void av_log_missing_feature(void *avc, const char *feature, int want_sample);
//
(*
// * Log a generic warning message asking for a sample. This function is
// * intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
// * only, and would normally not be used by applications.
// * @param[in] avc a pointer to an arbitrary struct of which the first field is
// * a pointer to an AVClass struct
// * @param[in] msg string containing an optional message, or NULL if no message
// * @deprecated Use avpriv_request_sample() instead.
*)
// attribute_deprecated
// void av_log_ask_for_sample(void *avc, const char *msg, ...) av_printf_format(2, 3);
// #endif (* FF_API_MISSING_SAMPLE *)
//
(*
// * Register the hardware accelerator hwaccel.
*)
// void av_register_hwaccel(AVHWAccel *hwaccel);
//
(*
// * If hwaccel is NULL, returns the first registered hardware accelerator,
// * if hwaccel is non-NULL, returns the next registered hardware accelerator
// * after hwaccel, or NULL if hwaccel is the last one.
*)
// AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel);
//
//
(*
// * Lock operation used by lockmgr
*)
// enum AVLockOp {
// AV_LOCK_CREATE, ///< Create a mutex
// AV_LOCK_OBTAIN, ///< Lock the mutex
// AV_LOCK_RELEASE, ///< Unlock the mutex
// AV_LOCK_DESTROY, ///< Free mutex resources
// };
//
(*
// * Register a user provided lock manager supporting the operations
// * specified by AVLockOp. mutex points to a (void * ) where the
// * lockmgr should store/get a pointer to a user allocated mutex. It's
// * NULL upon AV_LOCK_CREATE and != NULL for all other ops.
// *
// * @param cb User defined callback. Note: FFmpeg may invoke calls to this
// * callback during the call to av_lockmgr_register().
// * Thus, the application must be prepared to handle that.
// * If cb is set to NULL the lockmgr will be unregistered.
// * Also note that during unregistration the previously registered
// * lockmgr callback may also be invoked.
* )
// int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
//
(*
// * Get the type of the given codec.
*)
// enum AVMediaType avcodec_get_type(enum AVCodecID codec_id);
//
(*
// * Get the name of a codec.
// * @return a static string identifying the codec; never NULL
*)
// const char *avcodec_get_name(enum AVCodecID id);
//
(*
// * @return a positive value if s is open (i.e. avcodec_open2() was called on it
// * with no corresponding avcodec_close()), 0 otherwise.
*)
// int avcodec_is_open(AVCodecContext *s);
//
(*
// * @return a non-zero number if codec is an encoder, zero otherwise
*)
// int av_codec_is_encoder(const AVCodec *codec);
//
(*
// * @return a non-zero number if codec is a decoder, zero otherwise
*)
// int av_codec_is_decoder(const AVCodec *codec);
//
(*
// * @return descriptor for given codec ID or NULL if no descriptor exists.
*)
// const AVCodecDescriptor *avcodec_descriptor_get(enum AVCodecID id);
//
(*
// * Iterate over all codec descriptors known to libavcodec.
// *
// * @param prev previous descriptor. NULL to get the first descriptor.
// *
// * @return next descriptor or NULL after the last descriptor
*)
// const AVCodecDescriptor *avcodec_descriptor_next(const AVCodecDescriptor *prev);
//
(*
// * @return codec descriptor with the given name or NULL if no such descriptor
// * exists.
*)
// const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name);
implementation
uses ffmpeglib;
function avpicture_get_size; external avcodec_dll;
function avcodec_open2; external avcodec_dll;
procedure avcodec_register_all; external avcodec_dll;
procedure avcodec_get_frame_defaults; external avcodec_dll;
procedure avcodec_free_frame; external avcodec_dll;
function avcodec_decode_video2; external avcodec_dll;
procedure av_free_packet; external avcodec_dll;
function avcodec_close; external avcodec_dll;
function av_codec_next; external avcodec_dll;
function avcodec_alloc_frame; external avcodec_dll;
function avpicture_fill; external avcodec_dll;
function avcodec_find_decoder; external avcodec_dll;
{$IFDEF FF_API_DESTRUCT_PACKET}
procedure av_destruct_packet; external avcodec_dll;
{$ENDIF}
procedure av_init_packet; external avcodec_dll;
function av_new_packet; external avcodec_dll;
procedure av_shrink_packet; external avcodec_dll;
function av_grow_packet; external avcodec_dll;
function av_packet_from_data; external avcodec_dll;
function av_dup_packet; external avcodec_dll;
function av_copy_packet; external avcodec_dll;
function av_copy_packet_side_data; external avcodec_dll;
function av_packet_new_side_data; external avcodec_dll;
function av_packet_shrink_side_data; external avcodec_dll;
function av_packet_get_side_data; external avcodec_dll;
function av_packet_merge_side_data; external avcodec_dll;
function av_packet_split_side_data; external avcodec_dll;
procedure av_packet_free_side_data; external avcodec_dll;
function av_packet_ref; external avcodec_dll;
procedure av_packet_unref; external avcodec_dll;
procedure av_packet_move_ref; external avcodec_dll;
function av_packet_copy_props; external avcodec_dll;
function avcodec_alloc_context3; external avcodec_dll;
function avcodec_get_context_defaults3; external avcodec_dll;
end.
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