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Diffstat (limited to 'src/lib/ffmpeg/avcodec.pas')
| -rw-r--r-- | src/lib/ffmpeg/avcodec.pas | 3350 |
1 files changed, 3350 insertions, 0 deletions
diff --git a/src/lib/ffmpeg/avcodec.pas b/src/lib/ffmpeg/avcodec.pas new file mode 100644 index 00000000..e319ccb9 --- /dev/null +++ b/src/lib/ffmpeg/avcodec.pas @@ -0,0 +1,3350 @@ +(* + * copyright (c) 2001 Fabrice Bellard + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + *) + +(* + * This is a part of Pascal porting of ffmpeg. + * - Originally by Victor Zinetz for Delphi and Free Pascal on Windows. + * - For Mac OS X, some modifications were made by The Creative CAT, denoted as CAT + * in the source codes. + * - Changes and updates by the UltraStar Deluxe Team + *) + +(* + * Conversion of libavcodec/avcodec.h + * Min. version: 51.16.0, revision 6577, Sat Oct 7 15:30:46 2006 UTC + * Max. version: 51.63.0, revision 14666, Fri Aug 8 18:34:27 2008 UTC + *) + +unit avcodec; + +{$IFDEF FPC} + {$MODE DELPHI } + {$PACKENUM 4} (* use 4-byte enums *) + {$PACKRECORDS C} (* C/C++-compatible record packing *) +{$ELSE} + {$MINENUMSIZE 4} (* use 4-byte enums *) +{$ENDIF} + +{$IFDEF DARWIN} + {$linklib libavcodec} +{$ENDIF} + +interface + +uses + ctypes, + avutil, + rational, + opt, + {$IFDEF UNIX} + BaseUnix, + {$ENDIF} + UConfig; + +const + (* Max. supported version by this header *) + LIBAVCODEC_MAX_VERSION_MAJOR = 51; + LIBAVCODEC_MAX_VERSION_MINOR = 63; + LIBAVCODEC_MAX_VERSION_RELEASE = 0; + LIBAVCODEC_MAX_VERSION = (LIBAVCODEC_MAX_VERSION_MAJOR * VERSION_MAJOR) + + (LIBAVCODEC_MAX_VERSION_MINOR * VERSION_MINOR) + + (LIBAVCODEC_MAX_VERSION_RELEASE * VERSION_RELEASE); + + (* Min. supported version by this header *) + LIBAVCODEC_MIN_VERSION_MAJOR = 51; + LIBAVCODEC_MIN_VERSION_MINOR = 16; + LIBAVCODEC_MIN_VERSION_RELEASE = 0; + LIBAVCODEC_MIN_VERSION = (LIBAVCODEC_MIN_VERSION_MAJOR * VERSION_MAJOR) + + (LIBAVCODEC_MIN_VERSION_MINOR * VERSION_MINOR) + + (LIBAVCODEC_MIN_VERSION_RELEASE * VERSION_RELEASE); + +(* Check if linked versions are supported *) +{$IF (LIBAVCODEC_VERSION < LIBAVCODEC_MIN_VERSION)} + {$MESSAGE Error 'Linked version of libavcodec is too old!'} +{$IFEND} + +(* Check if linked version is supported *) +{$IF (LIBAVCODEC_VERSION > LIBAVCODEC_MAX_VERSION)} + {$MESSAGE Warn 'Linked version of libavcodec may be unsupported!'} +{$IFEND} + +const + AV_NOPTS_VALUE: cint64 = $8000000000000000; + AV_TIME_BASE = 1000000; + AV_TIME_BASE_Q : TAVRational = (num: 1; den: AV_TIME_BASE); + +(** + * Identifies the syntax and semantics of the bitstream. + * The principle is roughly: + * Two decoders with the same ID can decode the same streams. + * Two encoders with the same ID can encode compatible streams. + * There may be slight deviations from the principle due to implementation + * details. + * + * If you add a codec ID to this list, add it so that + * 1. no value of a existing codec ID changes (that would break ABI), + * 2. it is as close as possible to similar codecs. + *) +type + TCodecID = ( + CODEC_ID_NONE, + + (* video codecs *) + CODEC_ID_MPEG1VIDEO, + CODEC_ID_MPEG2VIDEO, //* prefered ID for MPEG Video 1/2 decoding */ + CODEC_ID_MPEG2VIDEO_XVMC, + CODEC_ID_H261, + CODEC_ID_H263, + CODEC_ID_RV10, + CODEC_ID_RV20, + CODEC_ID_MJPEG, + CODEC_ID_MJPEGB, + CODEC_ID_LJPEG, + CODEC_ID_SP5X, + CODEC_ID_JPEGLS, + CODEC_ID_MPEG4, + CODEC_ID_RAWVIDEO, + CODEC_ID_MSMPEG4V1, + CODEC_ID_MSMPEG4V2, + CODEC_ID_MSMPEG4V3, + CODEC_ID_WMV1, + CODEC_ID_WMV2, + CODEC_ID_H263P, + CODEC_ID_H263I, + CODEC_ID_FLV1, + CODEC_ID_SVQ1, + CODEC_ID_SVQ3, + CODEC_ID_DVVIDEO, + CODEC_ID_HUFFYUV, + CODEC_ID_CYUV, + CODEC_ID_H264, + CODEC_ID_INDEO3, + CODEC_ID_VP3, + CODEC_ID_THEORA, + CODEC_ID_ASV1, + CODEC_ID_ASV2, + CODEC_ID_FFV1, + CODEC_ID_4XM, + CODEC_ID_VCR1, + CODEC_ID_CLJR, + CODEC_ID_MDEC, + CODEC_ID_ROQ, + CODEC_ID_INTERPLAY_VIDEO, + CODEC_ID_XAN_WC3, + CODEC_ID_XAN_WC4, + CODEC_ID_RPZA, + CODEC_ID_CINEPAK, + CODEC_ID_WS_VQA, + CODEC_ID_MSRLE, + CODEC_ID_MSVIDEO1, + CODEC_ID_IDCIN, + CODEC_ID_8BPS, + CODEC_ID_SMC, + CODEC_ID_FLIC, + CODEC_ID_TRUEMOTION1, + CODEC_ID_VMDVIDEO, + CODEC_ID_MSZH, + CODEC_ID_ZLIB, + CODEC_ID_QTRLE, + CODEC_ID_SNOW, + CODEC_ID_TSCC, + CODEC_ID_ULTI, + CODEC_ID_QDRAW, + CODEC_ID_VIXL, + CODEC_ID_QPEG, + CODEC_ID_XVID, + CODEC_ID_PNG, + CODEC_ID_PPM, + CODEC_ID_PBM, + CODEC_ID_PGM, + CODEC_ID_PGMYUV, + CODEC_ID_PAM, + CODEC_ID_FFVHUFF, + CODEC_ID_RV30, + CODEC_ID_RV40, + CODEC_ID_VC1, + CODEC_ID_WMV3, + CODEC_ID_LOCO, + CODEC_ID_WNV1, + CODEC_ID_AASC, + CODEC_ID_INDEO2, + CODEC_ID_FRAPS, + CODEC_ID_TRUEMOTION2, + CODEC_ID_BMP, + CODEC_ID_CSCD, + CODEC_ID_MMVIDEO, + CODEC_ID_ZMBV, + CODEC_ID_AVS, + CODEC_ID_SMACKVIDEO, + CODEC_ID_NUV, + CODEC_ID_KMVC, + CODEC_ID_FLASHSV, + CODEC_ID_CAVS, + CODEC_ID_JPEG2000, + CODEC_ID_VMNC, + CODEC_ID_VP5, + CODEC_ID_VP6, + CODEC_ID_VP6F, + CODEC_ID_TARGA, + CODEC_ID_DSICINVIDEO, + CODEC_ID_TIERTEXSEQVIDEO, + CODEC_ID_TIFF, + CODEC_ID_GIF, + CODEC_ID_FFH264, + CODEC_ID_DXA, + CODEC_ID_DNXHD, + CODEC_ID_THP, + CODEC_ID_SGI, + CODEC_ID_C93, + CODEC_ID_BETHSOFTVID, + CODEC_ID_PTX, + CODEC_ID_TXD, + CODEC_ID_VP6A, + CODEC_ID_AMV, + CODEC_ID_VB, + CODEC_ID_PCX, + CODEC_ID_SUNRAST, + CODEC_ID_INDEO4, + CODEC_ID_INDEO5, + CODEC_ID_MIMIC, + CODEC_ID_RL2, + CODEC_ID_8SVX_EXP, + CODEC_ID_8SVX_FIB, + CODEC_ID_ESCAPE124, + CODEC_ID_DIRAC, + CODEC_ID_BFI, + CODEC_ID_CMV, + CODEC_ID_MOTIONPIXELS, + CODEC_ID_TGV, + + //* various PCM "codecs" */ + CODEC_ID_PCM_S16LE= $10000, + CODEC_ID_PCM_S16BE, + CODEC_ID_PCM_U16LE, + CODEC_ID_PCM_U16BE, + CODEC_ID_PCM_S8, + CODEC_ID_PCM_U8, + CODEC_ID_PCM_MULAW, + CODEC_ID_PCM_ALAW, + CODEC_ID_PCM_S32LE, + CODEC_ID_PCM_S32BE, + CODEC_ID_PCM_U32LE, + CODEC_ID_PCM_U32BE, + CODEC_ID_PCM_S24LE, + CODEC_ID_PCM_S24BE, + CODEC_ID_PCM_U24LE, + CODEC_ID_PCM_U24BE, + CODEC_ID_PCM_S24DAUD, + CODEC_ID_PCM_ZORK, + CODEC_ID_PCM_S16LE_PLANAR, + CODEC_ID_PCM_DVD, + CODEC_ID_PCM_F32BE, + + //* various ADPCM codecs */ + CODEC_ID_ADPCM_IMA_QT= $11000, + CODEC_ID_ADPCM_IMA_WAV, + CODEC_ID_ADPCM_IMA_DK3, + CODEC_ID_ADPCM_IMA_DK4, + CODEC_ID_ADPCM_IMA_WS, + CODEC_ID_ADPCM_IMA_SMJPEG, + CODEC_ID_ADPCM_MS, + CODEC_ID_ADPCM_4XM, + CODEC_ID_ADPCM_XA, + CODEC_ID_ADPCM_ADX, + CODEC_ID_ADPCM_EA, + CODEC_ID_ADPCM_G726, + CODEC_ID_ADPCM_CT, + CODEC_ID_ADPCM_SWF, + CODEC_ID_ADPCM_YAMAHA, + CODEC_ID_ADPCM_SBPRO_4, + CODEC_ID_ADPCM_SBPRO_3, + CODEC_ID_ADPCM_SBPRO_2, + CODEC_ID_ADPCM_THP, + CODEC_ID_ADPCM_IMA_AMV, + CODEC_ID_ADPCM_EA_R1, + CODEC_ID_ADPCM_EA_R3, + CODEC_ID_ADPCM_EA_R2, + CODEC_ID_ADPCM_IMA_EA_SEAD, + CODEC_ID_ADPCM_IMA_EA_EACS, + CODEC_ID_ADPCM_EA_XAS, + CODEC_ID_ADPCM_EA_MAXIS_XA, + + //* AMR */ + CODEC_ID_AMR_NB= $12000, + CODEC_ID_AMR_WB, + + //* RealAudio codecs*/ + CODEC_ID_RA_144= $13000, + CODEC_ID_RA_288, + + //* various DPCM codecs */ + CODEC_ID_ROQ_DPCM= $14000, + CODEC_ID_INTERPLAY_DPCM, + CODEC_ID_XAN_DPCM, + CODEC_ID_SOL_DPCM, + + (* audio codecs *) + CODEC_ID_MP2= $15000, + CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3 + CODEC_ID_AAC, + {$IF LIBAVCODEC_VERSION < 52000000} // 52.0.0 + _CODEC_ID_MPEG4AAC, // will be redefined to CODEC_ID_AAC below + {$IFEND} + CODEC_ID_AC3, + CODEC_ID_DTS, + CODEC_ID_VORBIS, + CODEC_ID_DVAUDIO, + CODEC_ID_WMAV1, + CODEC_ID_WMAV2, + CODEC_ID_MACE3, + CODEC_ID_MACE6, + CODEC_ID_VMDAUDIO, + CODEC_ID_SONIC, + CODEC_ID_SONIC_LS, + CODEC_ID_FLAC, + CODEC_ID_MP3ADU, + CODEC_ID_MP3ON4, + CODEC_ID_SHORTEN, + CODEC_ID_ALAC, + CODEC_ID_WESTWOOD_SND1, + CODEC_ID_GSM, ///< as in Berlin toast format + CODEC_ID_QDM2, + CODEC_ID_COOK, + CODEC_ID_TRUESPEECH, + CODEC_ID_TTA, + CODEC_ID_SMACKAUDIO, + CODEC_ID_QCELP, + CODEC_ID_WAVPACK, + CODEC_ID_DSICINAUDIO, + CODEC_ID_IMC, + CODEC_ID_MUSEPACK7, + CODEC_ID_MLP, + CODEC_ID_GSM_MS, { as found in WAV } + CODEC_ID_ATRAC3, + CODEC_ID_VOXWARE, + CODEC_ID_APE, + CODEC_ID_NELLYMOSER, + CODEC_ID_MUSEPACK8, + CODEC_ID_SPEEX, + CODEC_ID_WMAVOICE, + CODEC_ID_WMAPRO, + CODEC_ID_WMALOSSLESS, + CODEC_ID_ATRAC3P, + + //* subtitle codecs */ + CODEC_ID_DVD_SUBTITLE= $17000, + CODEC_ID_DVB_SUBTITLE, + CODEC_ID_TEXT, ///< raw UTF-8 text + CODEC_ID_XSUB, + CODEC_ID_SSA, + CODEC_ID_MOV_TEXT, + + (* other specific kind of codecs (generally used for attachments) *) + CODEC_ID_TTF= $18000, + + CODEC_ID_PROBE= $19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it + + CODEC_ID_MPEG2TS= $20000, {*< _FAKE_ codec to indicate a raw MPEG-2 TS + * stream (only used by libavformat) *} + __CODEC_ID_4BYTE = $FFFFF // ensure 4-byte enum + ); + +{$IF LIBAVCODEC_VERSION < 52000000} // 52.0.0 +{* CODEC_ID_MP3LAME is obsolete *} +const + CODEC_ID_MP3LAME = CODEC_ID_MP3; + CODEC_ID_MPEG4AAC = CODEC_ID_AAC; +{$IFEND} + +type + TCodecType = ( + CODEC_TYPE_UNKNOWN = -1, + CODEC_TYPE_VIDEO, + CODEC_TYPE_AUDIO, + CODEC_TYPE_DATA, + CODEC_TYPE_SUBTITLE, + CODEC_TYPE_ATTACHMENT, + CODEC_TYPE_NB + ); + +{** + * currently unused, may be used if 24/32 bits samples ever supported */ + * all in native endian + *} +type + TSampleFormat = ( + SAMPLE_FMT_NONE = -1, + SAMPLE_FMT_U8, ///< unsigned 8 bits + SAMPLE_FMT_S16, ///< signed 16 bits + SAMPLE_FMT_S24, ///< signed 24 bits + SAMPLE_FMT_S32, ///< signed 32 bits + SAMPLE_FMT_FLT, ///< float + SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec + ); + _TSampleFormatArray = array [0 .. MaxInt div SizeOf(TSampleFormat)-1] of TSampleFormat; + PSampleFormatArray = ^_TSampleFormatArray; + +const + {* in bytes *} + AVCODEC_MAX_AUDIO_FRAME_SIZE = 192000; // 1 second of 48khz 32bit audio + +{** + * 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 = 8; + +{** + * minimum encoding buffer size. + * Used to avoid some checks during header writing. + *} + FF_MIN_BUFFER_SIZE = 16384; + +type +{* + * motion estimation type. + *} + TMotion_Est_ID = ( + ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed + ME_FULL, + ME_LOG, + ME_PHODS, + ME_EPZS, ///< enhanced predictive zonal search + ME_X1, ///< reserved for experiments + ME_HEX, ///< hexagon based search + ME_UMH, ///< uneven multi-hexagon search + ME_ITER, ///< iterative search + ME_TESA ///< transformed exhaustive search algorithm + ); + + 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 + ); + + PRcOverride = ^TRcOverride; + TRcOverride = record {16} + start_frame: cint; + end_frame: cint; + qscale: cint; // if this is 0 then quality_factor will be used instead + quality_factor: cfloat; + end; + +const + FF_MAX_B_FRAMES = 16; + +{* encoding support + These flags can be passed in AVCodecContext.flags before initialization. + Note: Not everything is supported yet. +*} + + CODEC_FLAG_QSCALE = $0002; ///< Use fixed qscale. + CODEC_FLAG_4MV = $0004; ///< 4 MV per MB allowed / advanced prediction for H263. + CODEC_FLAG_QPEL = $0010; ///< use qpel MC. + CODEC_FLAG_GMC = $0020; ///< use GMC. + CODEC_FLAG_MV0 = $0040; ///< always try a MB with MV=<0,0>. + CODEC_FLAG_PART = $0080; ///< Use data partitioning. + {** + * 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_EXTERN_HUFF = $1000; ///< use external huffman table (for mjpeg) + CODEC_FLAG_GRAY = $2000; ///< only decode/encode grayscale + CODEC_FLAG_EMU_EDGE = $4000; ///< don't draw edges + CODEC_FLAG_PSNR = $8000; ///< error[?] variables will be set during encoding + CODEC_FLAG_TRUNCATED = $00010000; //** input bitstream might be truncated at a random location instead + // of only at frame boundaries */ + CODEC_FLAG_NORMALIZE_AQP = $00020000; ///< normalize adaptive quantization + CODEC_FLAG_INTERLACED_DCT = $00040000; ///< use interlaced dct + CODEC_FLAG_LOW_DELAY = $00080000; ///< force low delay + CODEC_FLAG_ALT_SCAN = $00100000; ///< use alternate scan + {$IF LIBAVCODEC_VERSION < 52000000} // < 52.0.0 + CODEC_FLAG_TRELLIS_QUANT = $00200000; ///< use trellis quantization + {$IFEND} + CODEC_FLAG_GLOBAL_HEADER = $00400000; ///< place global headers in extradata instead of every keyframe + CODEC_FLAG_BITEXACT = $00800000; ///< use only bitexact stuff (except (i)dct) + {* Fx : Flag for h263+ extra options *} + {$IF LIBAVCODEC_VERSION < 52000000} // < 52.0.0 + CODEC_FLAG_H263P_AIC = $01000000; ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this) + {$IFEND} + CODEC_FLAG_AC_PRED = $01000000; ///< H263 Advanced intra coding / MPEG4 AC prediction + CODEC_FLAG_H263P_UMV = $02000000; ///< Unlimited motion vector + CODEC_FLAG_CBP_RD = $04000000; ///< use rate distortion optimization for cbp + CODEC_FLAG_QP_RD = $08000000; ///< use rate distortion optimization for qp selectioon + CODEC_FLAG_H263P_AIV = $00000008; ///< H263 Alternative inter vlc + CODEC_FLAG_OBMC = $00000001; ///< OBMC + CODEC_FLAG_LOOP_FILTER = $00000800; ///< loop filter + CODEC_FLAG_H263P_SLICE_STRUCT = $10000000; + CODEC_FLAG_INTERLACED_ME = $20000000; ///< interlaced motion estimation + CODEC_FLAG_SVCD_SCAN_OFFSET = $40000000; ///< will reserve space for SVCD scan offset user data + CODEC_FLAG_CLOSED_GOP = $80000000; + CODEC_FLAG2_FAST = $00000001; ///< allow non spec compliant speedup tricks + CODEC_FLAG2_STRICT_GOP = $00000002; ///< strictly enforce GOP size + 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_BPYRAMID = $00000010; ///< H.264 allow b-frames to be used as references + CODEC_FLAG2_WPRED = $00000020; ///< H.264 weighted biprediction for b-frames + CODEC_FLAG2_MIXED_REFS = $00000040; ///< H.264 multiple references per partition + CODEC_FLAG2_8X8DCT = $00000080; ///< H.264 high profile 8x8 transform + CODEC_FLAG2_FASTPSKIP = $00000100; ///< H.264 fast pskip + CODEC_FLAG2_AUD = $00000200; ///< H.264 access unit delimiters + CODEC_FLAG2_BRDO = $00000400; ///< b-frame rate-distortion optimization + CODEC_FLAG2_INTRA_VLC = $00000800; ///< use MPEG-2 intra VLC table + CODEC_FLAG2_MEMC_ONLY = $00001000; ///< only do ME/MC (I frames -> ref, P frame -> ME+MC) + CODEC_FLAG2_DROP_FRAME_TIMECODE = $00002000; ///< timecode is in drop frame format. + CODEC_FLAG2_SKIP_RD = $00004000; ///< RD optimal MB level residual skipping + CODEC_FLAG2_CHUNKS = $00008000; ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries. + CODEC_FLAG2_NON_LINEAR_QUANT = $00010000; ///< Use MPEG-2 nonlinear quantizer. + CODEC_FLAG2_BIT_RESERVOIR = $00020000; ///< Use a bit reservoir when encoding if possible + +(* Unsupported options : + * Syntax Arithmetic coding (SAC) + * Reference Picture Selection + * Independant Segment Decoding *) +(* /Fx *) +(* codec capabilities *) + +const + CODEC_CAP_DRAW_HORIZ_BAND = $0001; ///< decoder can use draw_horiz_band callback + (** + * Codec uses get_buffer() for allocating buffers. + * direct rendering method 1 + *) + CODEC_CAP_DR1 = $0002; + (* if 'parse_only' field is true, then avcodec_parse_frame() can be used *) + CODEC_CAP_PARSE_ONLY = $0004; + CODEC_CAP_TRUNCATED = $0008; + (* codec can export data for HW decoding (XvMC) *) + CODEC_CAP_HWACCEL = $0010; + (** + * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data. + * if this is not set, the codec is guranteed to never be feeded with NULL data + *) + 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; + + //the following defines may change, don't expect compatibility if you use them + MB_TYPE_INTRA4x4 = $001; + MB_TYPE_INTRA16x16 = $002; //FIXME h264 specific + MB_TYPE_INTRA_PCM = $004; //FIXME h264 specific + MB_TYPE_16x16 = $008; + MB_TYPE_16x8 = $010; + MB_TYPE_8x16 = $020; + MB_TYPE_8x8 = $040; + MB_TYPE_INTERLACED = $080; + MB_TYPE_DIRECT2 = $100; //FIXME + MB_TYPE_ACPRED = $200; + MB_TYPE_GMC = $400; + MB_TYPE_SKIP = $800; + MB_TYPE_P0L0 = $1000; + MB_TYPE_P1L0 = $2000; + MB_TYPE_P0L1 = $4000; + MB_TYPE_P1L1 = $8000; + MB_TYPE_L0 = (MB_TYPE_P0L0 or MB_TYPE_P1L0); + MB_TYPE_L1 = (MB_TYPE_P0L1 or MB_TYPE_P1L1); + MB_TYPE_L0L1 = (MB_TYPE_L0 or MB_TYPE_L1); + MB_TYPE_QUANT = $0010000; + MB_TYPE_CBP = $0020000; + //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...) + +type +(** + * Pan Scan area. + * This specifies the area which should be displayed. + * Note there may be multiple such areas for one frame. + *) + PAVPanScan = ^TAVPanScan; + TAVPanScan = record {24} + (*** id. + * - encoding: set by user. + * - decoding: set by libavcodec. *) + id: cint; + + (*** width and height in 1/16 pel + * - encoding: set by user. + * - decoding: set by libavcodec. *) + width: cint; + height: cint; + + (*** position of the top left corner in 1/16 pel for up to 3 fields/frames. + * - encoding: set by user. + * - decoding: set by libavcodec. *) + position: array [0..2] of array [0..1] of smallint; + end; + +const + FF_QSCALE_TYPE_MPEG1 = 0; + FF_QSCALE_TYPE_MPEG2 = 1; + FF_QSCALE_TYPE_H264 = 2; + + FF_BUFFER_TYPE_INTERNAL = 1; + FF_BUFFER_TYPE_USER = 2; ///< Direct rendering buffers (image is (de)allocated by user) + FF_BUFFER_TYPE_SHARED = 4; ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared + FF_BUFFER_TYPE_COPY = 8; ///< just a (modified) copy of some other buffer, don't dealloc anything. + + + FF_I_TYPE = 1; ///< Intra + FF_P_TYPE = 2; ///< Predicted + FF_B_TYPE = 3; ///< Bi-dir predicted + FF_S_TYPE = 4; ///< S(GMC)-VOP MPEG4 + FF_SI_TYPE = 5; ///< Switching Intra + FF_SP_TYPE = 6; ///< Switching Predicted + FF_BI_TYPE = 7; + + FF_BUFFER_HINTS_VALID = $01; // Buffer hints value is meaningful (if 0 ignore) + FF_BUFFER_HINTS_READABLE = $02; // Codec will read from buffer + FF_BUFFER_HINTS_PRESERVE = $04; // User must not alter buffer content + FF_BUFFER_HINTS_REUSABLE = $08; // Codec will reuse the buffer (update) + +type + {** + * Audio Video Frame. + * New fields can be added to the end of FF_COMMON_FRAME with minor version + * bumps. + * Removal, reordering and changes to existing fields require a major + * version bump. No fields should be added into AVFrame before or after + * FF_COMMON_FRAME! + * sizeof(AVFrame) must not be used outside libav*. + *} + PAVFrame = ^TAVFrame; + TAVFrame = record {200} + (** + * pointer to the picture planes. + * This might be different from the first allocated byte + * - encoding: + * - decoding: + *) + data: array [0..3] of pbyte; + linesize: array [0..3] of cint; + (** + * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer. + * This isn't used by libavcodec unless the default get/release_buffer() is used. + * - encoding: + * - decoding: + *) + base: array [0..3] of pbyte; + (** + * 1 -> keyframe, 0-> not + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. + *) + key_frame: cint; + (** + * Picture type of the frame, see ?_TYPE below. + * - encoding: Set by libavcodec. for coded_picture (and set by user for input). + * - decoding: Set by libavcodec. + *) + pict_type: cint; + (** + * presentation timestamp in time_base units (time when frame should be shown to user) + * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed. + * - encoding: MUST be set by user. + * - decoding: Set by libavcodec. + *) + pts: cint64; + (**\ + * picture number in bitstream order + * - encoding: set by + * - decoding: Set by libavcodec. + *) + coded_picture_number: cint; + (** + * picture number in display order + * - encoding: set by + * - decoding: Set by libavcodec. + *) + display_picture_number: cint; + (** + * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) + * - encoding: Set by libavcodec. for coded_picture (and set by user for input). + * - decoding: Set by libavcodec. + *) + quality: cint; + (** + * buffer age (1->was last buffer and dint change, 2->..., ...). + * Set to INT_MAX if the buffer has not been used yet. + * - encoding: unused + * - decoding: MUST be set by get_buffer(). + *) + age: cint; + (** + * is this picture used as reference + * The values for this are the same as the MpegEncContext.picture_structure + * variable, that is 1->top field, 2->bottom field, 3->frame/both fields. + * - encoding: unused + * - decoding: Set by libavcodec. (before get_buffer() call)). + *) + reference: cint; + (** + * QP table + * - encoding: unused + * - decoding: Set by libavcodec. + *) + qscale_table: PShortint; + (** + * QP store stride + * - encoding: unused + * - decoding: Set by libavcodec. + *) + qstride: cint; + (** + * mbskip_table[mb]>=1 if MB didn't change + * stride= mb_width = (width+15)>>4 + * - encoding: unused + * - decoding: Set by libavcodec. + *) + mbskip_table: pbyte; + (** + * motion vector table + * @code + * example: + * int mv_sample_log2= 4 - motion_subsample_log2; + * int mb_width= (width+15)>>4; + * int mv_stride= (mb_width << mv_sample_log2) + 1; + * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y]; + * @endcode + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + //int16_t (*motion_val[2])[2]; + motion_val: array [0..1] of pointer; + (** + * macroblock type table + * mb_type_base + mb_width + 2 + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + mb_type: PCuint; + (** + * log2 of the size of the block which a single vector in motion_val represents: + * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2) + * - encoding: unused + * - decoding: Set by libavcodec. + *) + motion_subsample_log2: byte; + (** + * for some private data of the user + * - encoding: unused + * - decoding: Set by user. + *) + opaque: pointer; + (** + * error + * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR. + * - decoding: unused + *) + error: array [0..3] of cuint64; + (** + * type of the buffer (to keep track of who has to deallocate data[*]) + * - encoding: Set by the one who allocates it. + * - decoding: Set by the one who allocates it. + * Note: User allocated (direct rendering) & internal buffers cannot coexist currently. + *) + type_: cint; + (** + * When decoding, this signals how much the picture must be delayed. + * extra_delay = repeat_pict / (2*fps) + * - encoding: unused + * - decoding: Set by libavcodec. + *) + repeat_pict: cint; + (** + * + *) + qscale_type: cint; + (** + * The content of the picture is interlaced. + * - encoding: Set by user. + * - decoding: Set by libavcodec. (default 0) + *) + interlaced_frame: cint; + (** + * If the content is interlaced, is top field displayed first. + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + top_field_first: cint; + (** + * Pan scan. + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + pan_scan: PAVPanScan; + (** + * Tell user application that palette has changed from previous frame. + * - encoding: ??? (no palette-enabled encoder yet) + * - decoding: Set by libavcodec. (default 0). + *) + palette_has_changed: cint; + (** + * codec suggestion on buffer type if != 0 + * - encoding: unused + * - decoding: Set by libavcodec. (before get_buffer() call)). + *) + buffer_hints: cint; + (** + * DCT coefficients + * - encoding: unused + * - decoding: Set by libavcodec. + *) + dct_coeff: PsmallInt; + (** + * motion referece frame index + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + ref_index: array [0..1] of PShortint; + end; + +const + DEFAULT_FRAME_RATE_BASE = 1001000; + + FF_ASPECT_EXTENDED = 15; + + FF_RC_STRATEGY_XVID = 1; + + FF_BUG_AUTODETECT = 1; ///< autodetection + FF_BUG_OLD_MSMPEG4 = 2; + FF_BUG_XVID_ILACE = 4; + FF_BUG_UMP4 = 8; + FF_BUG_NO_PADDING = 16; + FF_BUG_AMV = 32; + FF_BUG_AC_VLC = 0; ///< will be removed, libavcodec can now handle these non compliant files by default + FF_BUG_QPEL_CHROMA = 64; + FF_BUG_STD_QPEL = 128; + FF_BUG_QPEL_CHROMA2 = 256; + FF_BUG_DIRECT_BLOCKSIZE = 512; + FF_BUG_EDGE = 1024; + FF_BUG_HPEL_CHROMA = 2048; + FF_BUG_DC_CLIP = 4096; + FF_BUG_MS = 8192; ///< workaround various bugs in microsofts broken decoders + //FF_BUG_FAKE_SCALABILITY = 16 //Autodetection should work 100%. + + FF_COMPLIANCE_VERY_STRICT = 2; ///< strictly conform to a 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_INOFFICIAL = -1; ///< allow inofficial extensions + FF_COMPLIANCE_EXPERIMENTAL = -2; ///< allow non standarized experimental things + + FF_ER_CAREFUL = 1; + FF_ER_COMPLIANT = 2; + FF_ER_AGGRESSIVE = 3; + FF_ER_VERY_AGGRESSIVE = 4; + + FF_DCT_AUTO = 0; + FF_DCT_FASTINT = 1; + FF_DCT_INT = 2; + FF_DCT_MMX = 3; + FF_DCT_MLIB = 4; + FF_DCT_ALTIVEC = 5; + FF_DCT_FAAN = 6; + + FF_IDCT_AUTO = 0; + FF_IDCT_INT = 1; + FF_IDCT_SIMPLE = 2; + FF_IDCT_SIMPLEMMX = 3; + FF_IDCT_LIBMPEG2MMX = 4; + FF_IDCT_PS2 = 5; + FF_IDCT_MLIB = 6; + FF_IDCT_ARM = 7; + FF_IDCT_ALTIVEC = 8; + FF_IDCT_SH4 = 9; + FF_IDCT_SIMPLEARM = 10; + FF_IDCT_H264 = 11; + FF_IDCT_VP3 = 12; + FF_IDCT_IPP = 13; + FF_IDCT_XVIDMMX = 14; + FF_IDCT_CAVS = 15; + FF_IDCT_SIMPLEARMV5TE= 16; + FF_IDCT_SIMPLEARMV6 = 17; + FF_IDCT_SIMPLEVIS = 18; + FF_IDCT_WMV2 = 19; + FF_IDCT_FAAN = 20; + + FF_EC_GUESS_MVS = 1; + FF_EC_DEBLOCK = 2; + + FF_MM_FORCE = $80000000; (* force usage of selected flags (OR) *) + (* lower 16 bits - CPU features *) + FF_MM_MMX = $0001; ///< standard MMX + FF_MM_3DNOW = $0004; ///< AMD 3DNOW + FF_MM_MMXEXT = $0002; ///< SSE integer functions or AMD MMX ext + FF_MM_SSE = $0008; ///< SSE functions + FF_MM_SSE2 = $0010; ///< PIV SSE2 functions + FF_MM_3DNOWEXT = $0020; ///< AMD 3DNowExt + FF_MM_SSE3 = $0040; ///< Prescott SSE3 functions + FF_MM_SSSE3 = $0080; ///< Conroe SSSE3 functions + FF_MM_IWMMXT = $0100; ///< XScale IWMMXT + + FF_PRED_LEFT = 0; + FF_PRED_PLANE = 1; + FF_PRED_MEDIAN = 2; + + FF_DEBUG_PICT_INFO = 1; + FF_DEBUG_RC = 2; + FF_DEBUG_BITSTREAM = 4; + FF_DEBUG_MB_TYPE = 8; + FF_DEBUG_QP = 16; + FF_DEBUG_MV = 32; + FF_DEBUG_DCT_COEFF = $00000040; + FF_DEBUG_SKIP = $00000080; + FF_DEBUG_STARTCODE = $00000100; + FF_DEBUG_PTS = $00000200; + FF_DEBUG_ER = $00000400; + FF_DEBUG_MMCO = $00000800; + FF_DEBUG_BUGS = $00001000; + FF_DEBUG_VIS_QP = $00002000; + FF_DEBUG_VIS_MB_TYPE = $00004000; + FF_DEBUG_BUFFERS = $00008000; + + FF_DEBUG_VIS_MV_P_FOR = $00000001; //visualize forward predicted MVs of P frames + FF_DEBUG_VIS_MV_B_FOR = $00000002; //visualize forward predicted MVs of B frames + FF_DEBUG_VIS_MV_B_BACK = $00000004; //visualize backward predicted MVs of B frames + + 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; + + FF_LAMBDA_SHIFT = 7; + FF_LAMBDA_SCALE = (1 shl FF_LAMBDA_SHIFT); + FF_QP2LAMBDA = 118; ///< factor to convert from H.263 QP to lambda + FF_LAMBDA_MAX = (256 * 128 - 1); + + FF_QUALITY_SCALE = FF_LAMBDA_SCALE; //FIXME maybe remove + + 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; + + 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_AA_AUTO = 0; + FF_AA_FASTINT = 1; //not implemented yet + FF_AA_INT = 2; + FF_AA_FLOAT = 3; + + FF_PROFILE_UNKNOWN = -99; + FF_PROFILE_AAC_MAIN = 0; + FF_PROFILE_AAC_LOW = 1; + FF_PROFILE_AAC_SSR = 2; + FF_PROFILE_AAC_LTP = 3; + + FF_LEVEL_UNKNOWN = -99; + + X264_PART_I4X4 = $001; (* Analyse i4x4 *) + X264_PART_I8X8 = $002; (* Analyse i8x8 (requires 8x8 transform) *) + X264_PART_P8X8 = $010; (* Analyse p16x8, p8x16 and p8x8 *) + X264_PART_P4X4 = $020; (* Analyse p8x4, p4x8, p4x4 *) + X264_PART_B8X8 = $100; (* Analyse b16x8, b8x16 and b8x8 *) + + FF_COMPRESSION_DEFAULT = -1; + +const + AVPALETTE_SIZE = 1024; + AVPALETTE_COUNT = 256; + +type +(** + * AVPaletteControl + * This structure defines a method for communicating palette changes + * between and demuxer and a decoder. + * + * @deprecated Use AVPacket to send palette changes instead. + * This is totally broken. + *) + PAVPaletteControl = ^TAVPaletteControl; + TAVPaletteControl = record + (* demuxer sets this to 1 to indicate the palette has changed; + * decoder resets to 0 *) + palette_changed: cint; + + (* 4-byte ARGB palette entries, stored in native byte order; note that + * the individual palette components should be on a 8-bit scale; if + * the palette data comes from a IBM VGA native format, the component + * data is probably 6 bits in size and needs to be scaled *) + palette: array [0..AVPALETTE_COUNT - 1] of cuint; + end; {deprecated;} + +type + PAVClass = ^TAVClass; {const} + PAVCodecContext = ^TAVCodecContext; + + PAVCodec = ^TAVCodec; + + // int[4] + PQuadIntArray = ^TQuadIntArray; + TQuadIntArray = array[0..3] of cint; + // int (*func)(struct AVCodecContext *c2, void *arg) + TExecuteFunc = function(c2: PAVCodecContext; arg: Pointer): cint; cdecl; + + TAVClass = record {12} + class_name: pchar; + (* actually passing a pointer to an AVCodecContext + or AVFormatContext, which begin with an AVClass. + Needed because av_log is in libavcodec and has no visibility + of AVIn/OutputFormat *) + item_name: function (): pchar; cdecl; + option: PAVOption; + end; + + (** + * main external API structure. + * New fields can be added to the end with minor version bumps. + * Removal, reordering and changes to existing fields require a major + * version bump. + * sizeof(AVCodecContext) must not be used outside libav*. + *) + TAVCodecContext = record {720} + (** + * information on struct for av_log + * - set by avcodec_alloc_context + *) + av_class: PAVClass; + (** + * the average bitrate + * - encoding: Set by user; unused for constant quantizer encoding. + * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream. + *) + bit_rate: cint; + + (** + * number of bits the bitstream is allowed to diverge from the reference. + * the reference can be CBR (for CBR pass1) or VBR (for pass2) + * - encoding: Set by user; unused for constant quantizer encoding. + * - decoding: unused + *) + bit_rate_tolerance: cint; + + (** + * CODEC_FLAG_*. + * - encoding: Set by user. + * - decoding: Set by user. + *) + flags: cint; + + (** + * Some codecs need additional format info. It is stored here. + * If any muxer uses this then ALL demuxers/parsers AND encoders for the + * specific codec MUST set it correctly otherwise stream copy breaks. + * In general use of this field by muxers is not recommanded. + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. (FIXME: Is this OK?) + *) + sub_id: cint; + + (** + * 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; + + (** + * some codecs need / can use extradata like Huffman tables. + * mjpeg: Huffman tables + * rv10: additional flags + * mpeg4: global headers (they can be in the bitstream or here) + * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger + * than extradata_size to avoid prolems if it is read with the bitstream reader. + * The bytewise contents of extradata must not depend on the architecture or CPU endianness. + * - encoding: Set/allocated/freed by libavcodec. + * - decoding: Set/allocated/freed by user. + *) + extradata: pbyte; + extradata_size: cint; + + (** + * This is the fundamental unit of time (in seconds) in terms + * of which frame timestamps are represented. For fixed-fps content, + * timebase should be 1/framerate and timestamp increments should be + * identically 1. + * - encoding: MUST be set by user. + * - decoding: Set by libavcodec. + *) + time_base: TAVRational; + + (* video only *) + (** + * picture width / height. + * - encoding: MUST be set by user. + * - decoding: Set by libavcodec. + * Note: For compatibility it is possible to set this instead of + * coded_width/height before decoding. + *) + width, height: cint; + + (** + * the number of pictures in a group of pictures, or 0 for intra_only + * - encoding: Set by user. + * - decoding: unused + *) + gop_size: cint; + + (** + * Pixel format, see PIX_FMT_xxx. + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + pix_fmt: TAVPixelFormat; + + (** + * Frame rate emulation. If not zero, the lower layer (i.e. format handler) + * has to read frames at native frame rate. + * - encoding: Set by user. + * - decoding: unused + *) + rate_emu: 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. + * - encoding: unused + * - decoding: Set by user. + * @param height the height of the slice + * @param y the y position of the slice + * @param type 1->top field, 2->bottom field, 3->frame + * @param offset offset into the AVFrame.data from which the slice should be read + *) + draw_horiz_band: procedure (s: PAVCodecContext; + src: {const} PAVFrame; offset: PQuadIntArray; + y: cint; type_: cint; height: cint); cdecl; + + (* 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: TSampleFormat; ///< sample format, currenly unused + + (* The following data should not be initialized. *) + (** + * Samples per packet, initialized when calling 'init'. + *) + frame_size: cint; + frame_number: cint; ///< audio or video frame number + real_pict_num: cint; ///< returns the real picture number of previous encoded frame + + (** + * Number of frames the decoded output will be delayed relative to + * the encoded input. + * - encoding: Set by libavcodec. + * - decoding: unused + *) + delay: 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; + + (** + * maximum number of B-frames between non-B-frames + * Note: The output will be delayed by max_b_frames+1 relative to the input. + * - encoding: Set by user. + * - decoding: unused + *) + max_b_frames: cint; + + (** + * qscale factor between IP and B-frames + * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset). + * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset). + * - encoding: Set by user. + * - decoding: unused + *) + b_quant_factor: cfloat; + + (** obsolete FIXME remove *) + rc_strategy: cint; + + b_frame_strategy: cint; + + (** + * hurry up amount + * - encoding: unused + * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header + * @deprecated Deprecated in favor of skip_idct and skip_frame. + *) + hurry_up: cint; + + codec: PAVCodec; + + priv_data: pointer; + + {$IF LIBAVCODEC_VERSION < 52000000} // 52.0.0 + (* unused, FIXME remove*) + rtp_mode: cint; + {$IFEND} + + rtp_payload_size: cint; (* The size of the RTP payload: the coder will *) + (* do it's best to deliver a chunk with size *) + (* below rtp_payload_size, the chunk will start *) + (* with a start code on some codecs like H.263 *) + (* This doesn't take account of any particular *) + (* headers inside the transmited RTP payload *) + + + (* The RTP callback: This function is called *) + (* every time the encoder has a packet to send *) + (* Depends on the encoder if the data starts *) + (* with a Start Code (it should) H.263 does. *) + (* mb_nb contains the number of macroblocks *) + (* encoded in the RTP payload *) + rtp_callback: procedure (avctx: PAVCodecContext; data: pointer; + size: cint; mb_nb: cint); cdecl; + + (* 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; + + (** + * Private data of the user, can be used to carry app specific stuff. + * - encoding: Set by user. + * - decoding: Set by user. + *) + opaque: pointer; + + codec_name: array [0..31] of char; + codec_type: TCodecType; (* see CODEC_TYPE_xxx *) + codec_id: TCodecID; (* see 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 then 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; + + (** + * Work around bugs in encoders which sometimes cannot be detected automatically. + * - encoding: Set by user + * - decoding: Set by user + *) + workaround_bugs: cint; + + (** + * luma single coefficient elimination threshold + * - encoding: Set by user. + * - decoding: unused + *) + luma_elim_threshold: cint; + + (** + * chroma single coeff elimination threshold + * - encoding: Set by user. + * - decoding: unused + *) + chroma_elim_threshold: 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. While setting it to inofficial or lower + * will mean the encoder might use things that are not supported by all + * spec compliant decoders. Decoders make no difference between normal, + * inofficial and experimental, that is they always try to decode things + * when they can unless they are explicitly asked to behave stupid + * (=strictly conform to the specs) + *) + strict_std_compliance: cint; + + (** + * qscale offset between IP and B-frames + * - encoding: Set by user. + * - decoding: unused + *) + b_quant_offset: cfloat; + + (** + * Error resilience; higher values will detect more errors but may + * misdetect some more or less valid parts as errors. + * - encoding: unused + * - decoding: Set by user. + *) + error_resilience: cint; + + (** + * Called at the beginning of each frame to get a buffer for it. + * If pic.reference is set then the frame will be read later by libavcodec. + * avcodec_align_dimensions() should be used to find the required width and + * height, as they normally need to be rounded up to the next multiple of 16. + * - encoding: unused + * - decoding: Set by libavcodec., user can override. + *) + get_buffer: function (c: PAVCodecContext; pic: PAVFrame): cint; cdecl; + + (** + * Called to release buffers which were allocated with get_buffer. + * A released buffer can be reused in get_buffer(). + * pic.data[*] must be set to NULL. + * - encoding: unused + * - decoding: Set by libavcodec., user can override. + *) + release_buffer: procedure (c: PAVCodecContext; pic: PAVFrame); cdecl; + + (** + * If 1 the stream has a 1 frame delay during decoding. + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. + *) + has_b_frames: cint; + + (** + * number of bytes per packet if constant and known or 0 + * Used by some WAV based audio codecs. + *) + block_align: cint; + + parse_only: cint; (* - decoding only: if true, only parsing is done + (function avcodec_parse_frame()). The frame + data is returned. Only MPEG codecs support this now. *) + + (** + * 0-> h263 quant 1-> mpeg quant + * - encoding: Set by user. + * - decoding: unused + *) + mpeg_quant: cint; + + (** + * pass1 encoding statistics output buffer + * - encoding: Set by libavcodec. + * - decoding: unused + *) + stats_out: pchar; + + (** + * 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: pchar; + + (** + * ratecontrol qmin qmax limiting method + * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax. + * - encoding: Set by user. + * - decoding: unused + *) + rc_qsquish: cfloat; + + rc_qmod_amp: cfloat; + rc_qmod_freq: cint; + + (** + * ratecontrol override, see RcOverride + * - encoding: Allocated/set/freed by user. + * - decoding: unused + *) + rc_override: PRcOverride; + rc_override_count: cint; + + (** + * rate control equation + * - encoding: Set by user + * - decoding: unused + *) + rc_eq: {const} pchar; + + (** + * maximum bitrate + * - encoding: Set by user. + * - decoding: unused + *) + rc_max_rate: cint; + + (** + * minimum bitrate + * - encoding: Set by user. + * - decoding: unused + *) + rc_min_rate: cint; + + (** + * decoder bitstream buffer size + * - encoding: Set by user. + * - decoding: unused + *) + rc_buffer_size: cint; + rc_buffer_aggressivity: cfloat; + + (** + * 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; + + (** + * initial complexity for pass1 ratecontrol + * - encoding: Set by user. + * - decoding: unused + *) + rc_initial_cplx: cfloat; + + (** + * DCT algorithm, see FF_DCT_* below + * - encoding: Set by user. + * - decoding: unused + *) + dct_algo: cint; + + (** + * 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; + + {$IF LIBAVCODEC_VERSION < 52000000} // 52.0.0 + (* for binary compatibility *) + unused: cint; + {$IFEND} + + (** + * IDCT algorithm, see FF_IDCT_* below. + * - encoding: Set by user. + * - decoding: Set by user. + *) + idct_algo: cint; + + (** + * slice count + * - encoding: Set by libavcodec. + * - decoding: Set by user (or 0). + *) + slice_count: cint; + + (** + * slice offsets in the frame in bytes + * - encoding: Set/allocated by libavcodec. + * - decoding: Set/allocated by user (or NULL). + *) + slice_offset: PCint; + + (** + * error concealment flags + * - encoding: unused + * - decoding: Set by user. + *) + error_concealment: cint; + + (** + * dsp_mask could be add used to disable unwanted CPU features + * CPU features (i.e. MMX, SSE. ...) + * + * With the FORCE flag you may instead enable given CPU features. + * (Dangerous: Usable in case of misdetection, improper usage however will + * result into program crash.) + *) + dsp_mask: cuint; + + (** + * bits per sample/pixel from the demuxer (needed for huffyuv). + * - encoding: Set by libavcodec. + * - decoding: Set by user. + *) + bits_per_sample: cint; + + (** + * prediction method (needed for huffyuv) + * - encoding: Set by user. + * - decoding: unused + *) + prediction_method: cint; + + (** + * sample aspect ratio (0 if unknown) + * 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; + + (** + * the picture in the bitstream + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. + *) + coded_frame: PAVFrame; + + (** + * debug + * - encoding: Set by user. + * - decoding: Set by user. + *) + debug: cint; + + (** + * debug + * - encoding: Set by user. + * - decoding: Set by user. + *) + debug_mv: cint; + + (** + * error + * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR. + * - decoding: unused + *) + error: array [0..3] of cuint64; + + (** + * minimum MB quantizer + * - encoding: unused + * - decoding: unused + *) + mb_qmin: cint; + + (** + * maximum MB quantizer + * - encoding: unused + * - decoding: unused + *) + mb_qmax: cint; + + (** + * 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; + + (** + * callback to negotiate the pixelFormat + * @param fmt is the list of formats which are supported by the codec, + * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. + * The first is always the native one. + * @return the chosen format + * - encoding: unused + * - decoding: Set by user, if not set the native format will be chosen. + *) + get_format: function (s: PAVCodecContext; fmt: {const} PAVPixelFormat): TAVPixelFormat; cdecl; + + (** + * DTG active format information (additional aspect ratio + * information only used in DVB MPEG-2 transport streams) + * 0 if not set. + * + * - encoding: unused + * - decoding: Set by decoder. + *) + dtg_active_format: cint; + + (** + * maximum motion estimation search range in subpel units + * If 0 then no limit. + * + * - encoding: Set by user. + * - decoding: unused + *) + me_range: cint; + + (** + * intra quantizer bias + * - encoding: Set by user. + * - decoding: unused + *) + intra_quant_bias: cint; + + (** + * inter quantizer bias + * - encoding: Set by user. + * - decoding: unused + *) + inter_quant_bias: cint; + + (** + * color table ID + * - encoding: unused + * - decoding: Which clrtable should be used for 8bit RGB images. + * Tables have to be stored somewhere. FIXME + *) + color_table_id: cint; + + (** + * internal_buffer count + * Don't touch, used by libavcodec default_get_buffer(). + *) + internal_buffer_count: cint; + + (** + * internal_buffers + * Don't touch, used by libavcodec default_get_buffer(). + *) + internal_buffer: pointer; + + (** + * 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; + + (** + * coder type + * - encoding: Set by user. + * - decoding: unused + *) + coder_type: cint; + + (** + * context model + * - encoding: Set by user. + * - decoding: unused + *) + context_model: cint; + + { + (** + * + * - encoding: unused + * - decoding: Set by user. + *) + realloc: function (s: PAVCodecContext; buf: Pbyte; buf_size: cint): Pbyte; cdecl; + } + + (** + * slice flags + * - encoding: unused + * - decoding: Set by user. + *) + slice_flags: cint; + + (** + * XVideo Motion Acceleration + * - encoding: forbidden + * - decoding: set by decoder + *) + xvmc_acceleration: cint; + + (** + * macroblock decision mode + * - encoding: Set by user. + * - decoding: unused + *) + mb_decision: cint; + + (** + * custom intra quantization matrix + * - encoding: Set by user, can be NULL. + * - decoding: Set by libavcodec. + *) + intra_matrix: PWord; + + (** + * custom inter quantization matrix + * - encoding: Set by user, can be NULL. + * - decoding: Set by libavcodec. + *) + inter_matrix: PWord; + + (** + * 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: array [0..3] of char; //cuint; + + (** + * scene change detection threshold + * 0 is default, larger means fewer detected scene changes. + * - encoding: Set by user. + * - decoding: unused + *) + scenechange_threshold: cint; + + (** + * minimum Lagrange multipler + * - encoding: Set by user. + * - decoding: unused + *) + lmin: cint; + + (** + * maximum Lagrange multipler + * - encoding: Set by user. + * - decoding: unused + *) + lmax: cint; + + (** + * palette control structure + * - encoding: ??? (no palette-enabled encoder yet) + * - decoding: Set by user. + *) + palctrl: PAVPaletteControl; + + (** + * noise reduction strength + * - encoding: Set by user. + * - decoding: unused + *) + noise_reduction: cint; + + (** + * 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(). + * - encoding: unused + * - decoding: Set by libavcodec., user can override + *) + reget_buffer: function (c: PAVCodecContext; pic: PAVFrame): cint; cdecl; + + (** + * 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; + + (** + * + * - encoding: Set by user. + * - decoding: unused + *) + inter_threshold: cint; + + (** + * CODEC_FLAG2_* + * - encoding: Set by user. + * - decoding: Set by user. + *) + flags2: cint; + + (** + * Simulates errors in the bitstream to test error concealment. + * - encoding: Set by user. + * - decoding: unused + *) + error_rate: cint; + + (** + * MP3 antialias algorithm, see FF_AA_* below. + * - encoding: unused + * - decoding: Set by user. + *) + antialias_algo: cint; + + (** + * quantizer noise shaping + * - encoding: Set by user. + * - decoding: unused + *) + quantizer_noise_shaping: cint; + + (** + * 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; + + (** + * The codec may call this to execute several independent things. + * It will return only after finishing all tasks. + * The user may replace this with some multithreaded implementation, + * the default implementation will execute the parts serially. + * @param count the number of things to execute + * - encoding: Set by libavcodec, user can override. + * - decoding: Set by libavcodec, user can override. + *) + execute: function (c: PAVCodecContext; func: TExecuteFunc; arg: PPointer; ret: PCint; count: cint): cint; cdecl; + + (** + * thread opaque + * Can be used by execute() to store some per AVCodecContext stuff. + * - encoding: set by execute() + * - decoding: set by execute() + *) + thread_opaque: pointer; + + (** + * 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; + + (** + * noise vs. sse weight for the nsse comparsion function + * - encoding: Set by user. + * - decoding: unused + *) + nsse_weight: 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; + + (** + * profile + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + profile: cint; + + (** + * level + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + level: cint; + + (** + * low resolution decoding, 1-> 1/2 size, 2->1/4 size + * - encoding: unused + * - decoding: Set by user. + *) + lowres: cint; + + (** + * Bitstream width / height, may be different from width/height if lowres + * or other things are used. + * - encoding: unused + * - decoding: Set by user before init if known. Codec should override / dynamically change if needed. + *) + coded_width, coded_height: 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; + + (** + * 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: unused + * - decoding: Set by user. + *) + skip_loop_filter: TAVDiscard; + + (** + * + * - encoding: unused + * - decoding: Set by user. + *) + skip_idct: TAVDiscard; + + (** + * + * - encoding: unused + * - decoding: Set by user. + *) + skip_frame: TAVDiscard; + + (** + * + * - encoding: Set by user. + * - decoding: unused + *) + bidir_refine: cint; + + (** + * + * - encoding: Set by user. + * - decoding: unused + *) + brd_scale: cint; + + (** + * constant rate factor - quality-based VBR - values ~correspond to qps + * - encoding: Set by user. + * - decoding: unused + *) + {$IF LIBAVCODEC_VERSION >= 51021000} // 51.21.0 + crf: cfloat; + {$ELSE} + crf: cint; + {$IFEND} + + (** + * constant quantization parameter rate control method + * - encoding: Set by user. + * - decoding: unused + *) + cqp: cint; + + (** + * minimum GOP size + * - encoding: Set by user. + * - decoding: unused + *) + keyint_min: cint; + + (** + * number of reference frames + * - encoding: Set by user. + * - decoding: unused + *) + refs: cint; + + (** + * chroma qp offset from luma + * - encoding: Set by user. + * - decoding: unused + *) + chromaoffset: cint; + + (** + * Influences how often B-frames are used. + * - encoding: Set by user. + * - decoding: unused + *) + bframebias: cint; + + (** + * trellis RD quantization + * - encoding: Set by user. + * - decoding: unused + *) + trellis: cint; + + (** + * Reduce fluctuations in qp (before curve compression). + * - encoding: Set by user. + * - decoding: unused + *) + complexityblur: cfloat; + + (** + * in-loop deblocking filter alphac0 parameter + * alpha is in the range -6...6 + * - encoding: Set by user. + * - decoding: unused + *) + deblockalpha: cint; + + (** + * in-loop deblocking filter beta parameter + * beta is in the range -6...6 + * - encoding: Set by user. + * - decoding: unused + *) + deblockbeta: cint; + + (** + * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4 + * - encoding: Set by user. + * - decoding: unused + *) + partitions: cint; + + (** + * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal) + * - encoding: Set by user. + * - decoding: unused + *) + directpred: cint; + + (** + * Audio cutoff bandwidth (0 means "automatic") + * - encoding: Set by user. + * - decoding: unused + *) + cutoff: 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; + + (** + * Adjusts sensitivity of b_frame_strategy 1. + * - encoding: Set by user. + * - decoding: unused + *) + b_sensitivity: cint; + + (** + * - encoding: Set by user. + * - decoding: unused + *) + compression_level: cint; + + (** + * Sets whether to use LPC mode - used by FLAC encoder. + * - encoding: Set by user. + * - decoding: unused + *) + use_lpc: cint; + + (** + * LPC coefficient precision - used by FLAC encoder + * - encoding: Set by user. + * - decoding: unused + *) + lpc_coeff_precision: cint; + + (** + * - encoding: Set by user. + * - decoding: unused + *) + min_prediction_order: cint; + + (** + * - encoding: Set by user. + * - decoding: unused + *) + max_prediction_order: cint; + + (** + * search method for selecting prediction order + * - encoding: Set by user. + * - decoding: unused + *) + prediction_order_method: cint; + + (** + * - encoding: Set by user. + * - decoding: unused + *) + min_partition_order: cint; + + (** + * - encoding: Set by user. + * - decoding: unused + *) + max_partition_order: cint; + + {$IF LIBAVCODEC_VERSION >= 51026000} // 51.26.0 + (** + * GOP timecode frame start number, in non drop frame format + * - encoding: Set by user. + * - decoding: unused + *) + timecode_frame_start: cint64; + {$IFEND} + + {$IF LIBAVCODEC_VERSION >= 51042000} // 51.42.0 + (** + * Decoder should decode to this many channels if it can (0 for default) + * - encoding: unused + * - decoding: Set by user. + *) + request_channels: cint; + {$IFEND} + + {$IF LIBAVCODEC_VERSION > 51049000} // > 51.49.0 + (** + * Percentage of dynamic range compression to be applied by the decoder. + * The default value is 1.0, corresponding to full compression. + * - encoding: unused + * - decoding: Set by user. + *) + drc_scale: cfloat; + {$IFEND} + end; + +(** + * AVCodec. + *) + TAVCodec = record + name: pchar; + type_: TCodecType; + id: TCodecID; + priv_data_size: cint; + init: function (avctx: PAVCodecContext): cint; cdecl; (* typo corretion by the Creative CAT *) + encode: function (avctx: PAVCodecContext; buf: pchar; buf_size: cint; data: pointer): cint; cdecl; + close: function (avctx: PAVCodecContext): cint; cdecl; + decode: function (avctx: PAVCodecContext; outdata: pointer; var outdata_size: cint; + buf: {const} pchar; buf_size: cint): cint; cdecl; + (** + * Codec capabilities. + * see CODEC_CAP_* + *) + capabilities: cint; + next: PAVCodec; + (** + * Flush buffers. + * Will be called when seeking + *) + flush: procedure (avctx: PAVCodecContext); cdecl; + supported_framerates: {const} PAVRational; ///< array of supported framerates, or NULL if any, array is terminated by {0,0} + pix_fmts: {const} PAVPixelFormat; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1 + {$IF LIBAVCODEC_VERSION >= 51055000} // 51.55.0 + (** + * Descriptive name for the codec, meant to be more human readable than \p name. + * You \e should use the NULL_IF_CONFIG_SMALL() macro to define it. + *) + long_name: {const} PChar; + {$IFEND} + {$IF LIBAVCODEC_VERSION >= 51056000} // 51.56.0 + supported_samplerates: {const} PCint; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0 + {$IFEND} + {$IF LIBAVCODEC_VERSION >= 51062000} // 51.62.0 + sample_fmts: {const} PSampleFormatArray; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1 + {$IFEND} + end; + +(** + * four components are given, that's all. + * the last component is alpha + *) + PAVPicture = ^TAVPicture; + TAVPicture = record + data: array [0..3] of pchar; + linesize: array [0..3] of cint; ///< number of bytes per line + end; + +type + PAVSubtitleRect = ^TAVSubtitleRect; + TAVSubtitleRect = record + x: word; + y: word; + w: word; + h: word; + nb_colors: word; + linesize: cint; + rgba_palette: PCuint; + bitmap: pchar; + end; + + PAVSubtitle = ^TAVSubtitle; + TAVSubtitle = record {20} + format: word; (* 0 = graphics *) + start_display_time: cuint; (* relative to packet pts, in ms *) + end_display_time: cuint; (* relative to packet pts, in ms *) + num_rects: cuint; + rects: PAVSubtitleRect; + end; + + +(* resample.c *) + + PReSampleContext = pointer; + PAVResampleContext = pointer; + PImgReSampleContext = pointer; + +function audio_resample_init (output_channels: cint; input_channels: cint; + output_rate: cint; input_rate: cint): PReSampleContext; + cdecl; external av__codec; + +function audio_resample (s: PReSampleContext; output: PSmallint; input: PSmallint; nb_samples: cint): cint; + cdecl; external av__codec; + +procedure audio_resample_close (s: PReSampleContext); + cdecl; external av__codec; + + +function av_resample_init (out_rate: cint; in_rate: cint; filter_length: cint; + log2_phase_count: cint; linear: cint; cutoff: cdouble): PAVResampleContext; + cdecl; external av__codec; + +function av_resample (c: PAVResampleContext; dst: PSmallint; src: PSmallint; var consumed: cint; + src_size: cint; dst_size: cint; update_ctx: cint): cint; + cdecl; external av__codec; + +procedure av_resample_compensate (c: PAVResampleContext; sample_delta: cint; + compensation_distance: cint); + cdecl; external av__codec; + +procedure av_resample_close (c: PAVResampleContext); + cdecl; external av__codec; + + +{$IF LIBAVCODEC_VERSION < 52000000} // 52.0.0 +(* YUV420 format is assumed ! *) + +(** + * @deprecated Use the software scaler (swscale) instead. + *) +function img_resample_init (output_width: cint; output_height: cint; + input_width: cint; input_height: cint): PImgReSampleContext; + cdecl; external av__codec; deprecated; + +(** + * @deprecated Use the software scaler (swscale) instead. + *) +function img_resample_full_init (owidth: cint; oheight: cint; + iwidth: cint; iheight: cint; + topBand: cint; bottomBand: cint; + leftBand: cint; rightBand: cint; + padtop: cint; padbottom: cint; + padleft: cint; padright: cint): PImgReSampleContext; + cdecl; external av__codec; deprecated; + +(** + * @deprecated Use the software scaler (swscale) instead. + *) +procedure img_resample (s: PImgReSampleContext; output: PAVPicture; input: {const} PAVPicture); + cdecl; external av__codec; deprecated; + +(** + * @deprecated Use the software scaler (swscale) instead. + *) +procedure img_resample_close (s: PImgReSampleContext); + cdecl; external av__codec; deprecated; + +{$IFEND} + +(** + * Allocate memory for a picture. Call avpicture_free to free it. + * + * @param picture the picture to be filled in. + * @param pix_fmt the format of the picture. + * @param width the width of the picture. + * @param height the height of the picture. + * @return Zero if successful, a negative value if not. + *) +function avpicture_alloc (picture: PAVPicture; pix_fmt: TAVPixelFormat; + width: cint; height: cint): cint; + cdecl; external av__codec; + +(** + * Free a picture previously allocated by avpicture_alloc(). + * + * @param picture the AVPicture to be freed + *) +procedure avpicture_free (picture: PAVPicture); + cdecl; external av__codec; + +(** + * Fill in the AVPicture fields. + * The fields of the given AVPicture are filled in by using the 'ptr' address + * which points to the image data buffer. Depending on the specified picture + * format, one or multiple image data pointers and line sizes will be set. + * If a planar format is specified, several pointers will be set pointing to + * the different picture planes and the line sizes of the different planes + * will be stored in the lines_sizes array. + * + * @param picture AVPicture whose fields are to be filled in + * @param ptr Buffer which will contain or contains the actual image data + * @param pix_fmt The format in which the picture data is stored. + * @param width the width of the image in pixels + * @param height the height of the image in pixels + * @return size of the image data in bytes + *) +function avpicture_fill (picture: PAVPicture; ptr: pointer; + pix_fmt: TAVPixelFormat; width: cint; height: cint): cint; + cdecl; external av__codec; + +function avpicture_layout (src: {const} PAVPicture; pix_fmt: TAVPixelFormat; + width: cint; height: cint; + dest: pchar; dest_size: cint): cint; + cdecl; external av__codec; + +(** + * Calculate the size in bytes that a picture of the given width and height + * would occupy if stored in the given picture format. + * + * @param pix_fmt the given picture format + * @param width the width of the image + * @param height the height of the image + * @return Image data size in bytes + *) +function avpicture_get_size (pix_fmt: TAVPixelFormat; width: cint; height: cint): cint; + cdecl; external av__codec; + +procedure avcodec_get_chroma_sub_sample (pix_fmt: TAVPixelFormat; var h_shift: cint; var v_shift: cint); + cdecl; external av__codec; + +function avcodec_get_pix_fmt_name(pix_fmt: TAVPixelFormat): pchar; + cdecl; external av__codec; + +procedure avcodec_set_dimensions(s: PAVCodecContext; width: cint; height: cint); + cdecl; external av__codec; + +function avcodec_get_pix_fmt(name: {const} pchar): TAVPixelFormat; + cdecl; external av__codec; + +function avcodec_pix_fmt_to_codec_tag(p: TAVPixelFormat): cuint; + cdecl; external av__codec; + +const + FF_LOSS_RESOLUTION = $0001; {**< loss due to resolution change *} + FF_LOSS_DEPTH = $0002; {**< loss due to color depth change *} + FF_LOSS_COLORSPACE = $0004; {**< loss due to color space conversion *} + FF_LOSS_ALPHA = $0008; {**< loss of alpha bits *} + FF_LOSS_COLORQUANT = $0010; {**< loss due to color quantization *} + FF_LOSS_CHROMA = $0020; {**< loss of chroma (e.g. RGB to gray conversion) *} + +(** + * Computes 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. + *) +function avcodec_get_pix_fmt_loss (dst_pix_fmt: TAVPixelFormat; src_pix_fmt: TAVPixelFormat; + has_alpha: cint): cint; + cdecl; external av__codec; + +(** + * Finds the best pixel format to convert to given a certain source pixel + * format. When converting from one pixel format to another, information loss + * may occur. For example, when converting from RGB24 to GRAY, the color + * information will be lost. Similarly, other losses occur when converting from + * some formats to other formats. avcodec_find_best_pix_fmt() searches which of + * the given pixel formats should be used to suffer the least amount of loss. + * The pixel formats from which it chooses one, are determined by the + * \p pix_fmt_mask parameter. + * + * @code + * src_pix_fmt = PIX_FMT_YUV420P; + * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24); + * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss); + * @endcode + * + * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from + * @param[in] src_pix_fmt source pixel format + * @param[in] has_alpha Whether the source pixel format alpha channel is used. + * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur. + * @return The best pixel format to convert to or -1 if none was found. + *) +function avcodec_find_best_pix_fmt (pix_fmt_mask: cint; src_pix_fmt: TAVPixelFormat; + has_alpha: cint; loss_ptr: PCint): cint; + cdecl; external av__codec; + +{$IF LIBAVCODEC_VERSION >= 51041000} // 51.41.0 +(** + * Print in buf the string corresponding to the pixel format with + * number pix_fmt, or an header if pix_fmt is negative. + * + * @param[in] buf the buffer where to write the string + * @param[in] buf_size the size of buf + * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or + * a negative value to print the corresponding header. + * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1. + *) +procedure avcodec_pix_fmt_string (buf: PChar; buf_size: cint; pix_fmt: cint); + cdecl; external av__codec; +{$IFEND} + +const + FF_ALPHA_TRANSP = $0001; {* image has some totally transparent pixels *} + FF_ALPHA_SEMI_TRANSP = $0002; {* image has some transparent pixels *} + +(** + * Tell if an image really has transparent alpha values. + * @return ored mask of FF_ALPHA_xxx constants + *) +function img_get_alpha_info (src: {const} PAVPicture; + pix_fmt: TAVPixelFormat; + width: cint; height: cint): cint; + cdecl; external av__codec; + +{$IF LIBAVCODEC_VERSION < 52000000} // 52.0.0 +(** + * convert among pixel formats + * @deprecated Use the software scaler (swscale) instead. + *) +function img_convert (dst: PAVPicture; dst_pix_fmt: TAVPixelFormat; + src: {const} PAVPicture; pix_fmt: TAVPixelFormat; + width: cint; height: cint): cint; + cdecl; external av__codec; deprecated; +{$IFEND} + +(* deinterlace a picture *) +(* deinterlace - if not supported return -1 *) +function avpicture_deinterlace (dst: PAVPicture; src: {const} PAVPicture; + pix_fmt: TAVPixelFormat; width: cint; height: cint): cint; + cdecl; external av__codec; + +{* external high level API *} + +{$IF LIBAVCODEC_VERSION < 52000000} // 52.0.0 +{ +var + first_avcodec: PAVCodec; external av__codec; +} +{$IFEND} + +{$IF LIBAVCODEC_VERSION >= 51049000} // 51.49.0 +function av_codec_next(c: PAVCodec): PAVCodec; + cdecl; external av__codec; +{$IFEND} + +(** + * Returns the LIBAVCODEC_VERSION_INT constant. + *) +function avcodec_version(): cuint; + cdecl; external av__codec; + +{$IF LIBAVCODEC_VERSION < 52008000} // 52.8.0 +(* returns LIBAVCODEC_BUILD constant *) +function avcodec_build(): cuint; + cdecl; external av__codec; deprecated; +{$IFEND} + +(** + * Initializes libavcodec. + * + * @warning This function \e must be called before any other libavcodec + * function. + *) +procedure avcodec_init(); + cdecl; external av__codec; + +procedure register_avcodec(format: PAVCodec); + cdecl; external av__codec; + +(** + * Finds a registered encoder with a matching codec ID. + * + * @param id CodecID of the requested encoder + * @return An encoder if one was found, NULL otherwise. + *) +function avcodec_find_encoder(id: TCodecID): PAVCodec; + cdecl; external av__codec; + +(** + * Finds a registered encoder with the specified name. + * + * @param name name of the requested encoder + * @return An encoder if one was found, NULL otherwise. + *) +function avcodec_find_encoder_by_name(name: pchar): PAVCodec; + cdecl; external av__codec; + +(** + * Finds a registered decoder with a matching codec ID. + * + * @param id CodecID of the requested decoder + * @return A decoder if one was found, NULL otherwise. + *) +function avcodec_find_decoder(id: TCodecID): PAVCodec; + cdecl; external av__codec; + +(** + * Finds a registered decoder with the specified name. + * + * @param name name of the requested decoder + * @return A decoder if one was found, NULL otherwise. + *) +function avcodec_find_decoder_by_name(name: pchar): PAVCodec; + cdecl; external av__codec; +procedure avcodec_string(buf: pchar; buf_size: cint; enc: PAVCodecContext; encode: cint); + cdecl; external av__codec; + +(** + * Sets the fields of the given AVCodecContext to default values. + * + * @param s The AVCodecContext of which the fields should be set to default values. + *) +procedure avcodec_get_context_defaults(s: PAVCodecContext); + cdecl; external av__codec; + +{$IF LIBAVCODEC_VERSION >= 51039000} // 51.39.0 +(** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API! + * we WILL change its arguments and name a few times! *) +procedure avcodec_get_context_defaults2(s: PAVCodecContext; ctype: TCodecType); + cdecl; external av__codec; +{$IFEND} + +(** + * Allocates an AVCodecContext and sets its fields to default values. The + * resulting struct can be deallocated by simply calling av_free(). + * + * @return An AVCodecContext filled with default values or NULL on failure. + * @see avcodec_get_context_defaults + *) +function avcodec_alloc_context(): PAVCodecContext; + cdecl; external av__codec; + +{$IF LIBAVCODEC_VERSION >= 51039000} // 51.39.0 +(** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API! + * we WILL change its arguments and name a few times! *) +function avcodec_alloc_context2(ctype: TCodecType): PAVCodecContext; + cdecl; external av__codec; +{$IFEND} + +(** + * Sets the fields of the given AVFrame to default values. + * + * @param pic The AVFrame of which the fields should be set to default values. + *) +procedure avcodec_get_frame_defaults (pic: PAVFrame); + cdecl; external av__codec; + +(** + * Allocates an AVFrame and sets its fields to default values. The resulting + * struct can be deallocated by simply calling av_free(). + * + * @return An AVFrame filled with default values or NULL on failure. + * @see avcodec_get_frame_defaults + *) +function avcodec_alloc_frame(): PAVFrame; + cdecl; external av__codec; + +function avcodec_default_get_buffer (s: PAVCodecContext; pic: PAVFrame): cint; + cdecl; external av__codec; +procedure avcodec_default_release_buffer (s: PAVCodecContext; pic: PAVFrame); + cdecl; external av__codec; +function avcodec_default_reget_buffer (s: PAVCodecContext; pic: PAVFrame): cint; + cdecl; external av__codec; +procedure avcodec_align_dimensions(s: PAVCodecContext; width: PCint; height: PCint); + cdecl; external av__codec; + +(** + * Checks if the given dimension of a picture is valid, meaning that all + * bytes of the picture can be addressed with a signed int. + * + * @param[in] w Width of the picture. + * @param[in] h Height of the picture. + * @return Zero if valid, a negative value if invalid. + *) +function avcodec_check_dimensions (av_log_ctx: pointer; w: cuint; h: cuint): cint; + cdecl; external av__codec; +function avcodec_default_get_format(s: PAVCodecContext; fmt: {const} PAVPixelFormat): TAVPixelFormat; + cdecl; external av__codec; + +function avcodec_thread_init (s: PAVCodecContext; thread_count: cint): cint; + cdecl; external av__codec; +procedure avcodec_thread_free (s: PAVCodecContext); + cdecl; external av__codec; +function avcodec_thread_execute (s: PAVCodecContext; func: TExecuteFunc; arg: PPointer; var ret: cint; count: cint): cint; + cdecl; external av__codec; +function avcodec_default_execute (s: PAVCodecContext; func: TExecuteFunc; arg: PPointer; var ret: cint; count: cint): cint; + cdecl; external av__codec; +//FIXME func typedef + +(** + * Initializes the AVCodecContext to use the given AVCodec. Prior to using this + * function the context has to be allocated. + * + * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(), + * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for + * retrieving a codec. + * + * @warning This function is not thread safe! + * + * @code + * avcodec_register_all(); + * codec = avcodec_find_decoder(CODEC_ID_H264); + * if (!codec) + * exit(1); + * + * context = avcodec_alloc_context(); + * + * if (avcodec_open(context, codec) < 0) + * exit(1); + * @endcode + * + * @param avctx The context which will be set up to use the given codec. + * @param codec The codec to use within the context. + * @return zero on success, a negative value on error + * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder + *) +function avcodec_open (avctx: PAVCodecContext; codec: PAVCodec): cint; + cdecl; external av__codec; + +(** + * @deprecated Use avcodec_decode_audio2() instead. + *) +function avcodec_decode_audio (avctx: PAVCodecContext; samples: PSmallint; + var frame_size_ptr: cint; + buf: {const} pchar; buf_size: cint): cint; + cdecl; external av__codec; + +{$IF LIBAVCODEC_VERSION >= 51030000} // 51.30.0 +(** + * Decodes an audio frame from \p buf into \p samples. + * The avcodec_decode_audio2() function decodes an audio frame from the input + * buffer \p buf of size \p buf_size. To decode it, it makes use of the + * audio codec which was coupled with \p avctx using avcodec_open(). The + * resulting decoded frame is stored in output buffer \p samples. If no frame + * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the + * decompressed frame size in \e bytes. + * + * @warning You \e must set \p frame_size_ptr to the allocated size of the + * output buffer before calling avcodec_decode_audio2(). + * + * @warning The input buffer must be \c 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 \p buf should be set to 0 to ensure that + * no overreading happens for damaged MPEG streams. + * + * @note You might have to align the input buffer \p buf and output buffer \p + * 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, the + * bitstream should have 4 byte alignment at minimum and all sample data should + * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If + * the linesize is not a multiple of 16 then there's no sense in aligning the + * start of the buffer to 16. + * + * @param avctx the codec context + * @param[out] samples the output buffer + * @param[in,out] frame_size_ptr the output buffer size in bytes + * @param[in] buf the input buffer + * @param[in] buf_size the input buffer size in bytes + * @return On error a negative value is returned, otherwise the number of bytes + * used or zero if no frame could be decompressed. + *) +function avcodec_decode_audio2(avctx : PAVCodecContext; samples : PSmallint; + var frame_size_ptr : cint; + buf: {const} pchar; buf_size: cint): cint; + cdecl; external av__codec; +{$IFEND} + +(** + * Decodes a video frame from \p buf into \p picture. + * The avcodec_decode_video() function decodes a video frame from the input + * buffer \p buf of size \p buf_size. To decode it, it makes use of the + * video codec which was coupled with \p avctx using avcodec_open(). The + * resulting decoded frame is stored in \p picture. + * + * @warning The input buffer must be \c 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 \p buf should be set to 0 to ensure that + * no overreading happens for damaged MPEG streams. + * + * @note You might have to align the input buffer \p buf and output buffer \p + * 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, the + * bitstream should have 4 byte alignment at minimum and all sample data should + * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If + * the linesize is not a multiple of 16 then there's no sense in aligning the + * start of the buffer to 16. + * + * @param avctx the codec context + * @param[out] picture The AVFrame in which the decoded video frame will be stored. + * @param[in] buf the input buffer + * @param[in] buf_size the size of the input buffer in bytes + * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero. + * @return On error a negative value is returned, otherwise the number of bytes + * used or zero if no frame could be decompressed. + *) +function avcodec_decode_video (avctx: PAVCodecContext; picture: PAVFrame; + var got_picture_ptr: cint; + buf: {const} PChar; buf_size: cint): cint; + cdecl; external av__codec; + +(* Decode a subtitle message. Return -1 if 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. *) +function avcodec_decode_subtitle (avctx: PAVCodecContext; sub: PAVSubtitle; + var got_sub_ptr: cint; + buf: {const} pchar; buf_size: cint): cint; + cdecl; external av__codec; +function avcodec_parse_frame (avctx: PAVCodecContext; pdata: PPointer; + data_size_ptr: PCint; + buf: pchar; buf_size: cint): cint; + cdecl; external av__codec; + +(** + * Encodes an audio frame from \p samples into \p buf. + * The avcodec_encode_audio() function encodes an audio frame from the input + * buffer \p samples. To encode it, it makes use of the audio codec which was + * coupled with \p avctx using avcodec_open(). The resulting encoded frame is + * stored in output buffer \p buf. + * + * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large. + * + * @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 \p avctx. + * For PCM audio the number of samples read from \p samples is equal to + * \p buf_size * input_sample_size / output_sample_size. + * @return On error a negative value is returned, on success zero or the number + * of bytes used to encode the data read from the input buffer. + *) +function avcodec_encode_audio (avctx: PAVCodecContext; buf: PByte; + buf_size: cint; samples: {const} PSmallint): cint; + cdecl; external av__codec; + +(** + * Encodes a video frame from \p pict into \p buf. + * The avcodec_encode_video() function encodes a video frame from the input + * \p pict. To encode it, it makes use of the video codec which was coupled with + * \p avctx using avcodec_open(). The resulting encoded bytes representing the + * frame are stored in the output buffer \p buf. The input picture should be + * stored using a specific format, namely \c 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 input buffer. + *) +function avcodec_encode_video (avctx: PAVCodecContext; buf: PByte; + buf_size: cint; pict: PAVFrame): cint; + cdecl; external av__codec; +function avcodec_encode_subtitle (avctx: PAVCodecContext; buf: pchar; + buf_size: cint; sub: {const} PAVSubtitle): cint; + cdecl; external av__codec; + +function avcodec_close (avctx: PAVCodecContext): cint; + cdecl; external av__codec; + +procedure avcodec_register_all (); + cdecl; external av__codec; + +(** + * Flush buffers, should be called when seeking or when switching to a different stream. + *) +procedure avcodec_flush_buffers (avctx: PAVCodecContext); + cdecl; external av__codec; + +procedure avcodec_default_free_buffers (s: PAVCodecContext); + cdecl; external av__codec; + +(* misc useful functions *) + +(** + * Returns a single letter to describe the given picture type \p pict_type. + * + * @param[in] pict_type the picture type + * @return A single character representing the picture type. + *) +function av_get_pict_type_char (pict_type: cint): char; + cdecl; external av__codec; + +(** + * Returns codec bits per sample. + * + * @param[in] codec_id the codec + * @return Number of bits per sample or zero if unknown for the given codec. + *) +function av_get_bits_per_sample (codec_id: TCodecID): cint; + cdecl; external av__codec; + +{$IF LIBAVCODEC_VERSION >= 51041000} // 51.41.0 +(** + * Returns sample format bits per sample. + * + * @param[in] sample_fmt the sample format + * @return Number of bits per sample or zero if unknown for the given sample format. + *) +function av_get_bits_per_sample_format(sample_fmt: TSampleFormat): cint; + cdecl; external av__codec; +{$IFEND} + +const + AV_PARSER_PTS_NB = 4; + PARSER_FLAG_COMPLETE_FRAMES = $0001; + +type + {* frame parsing *} + PAVCodecParserContext = ^TAVCodecParserContext; + PAVCodecParser = ^TAVCodecParser; + + TAVCodecParserContext = record + priv_data: pointer; + parser: PAVCodecParser; + frame_offset: cint64; (* offset of the current frame *) + cur_offset: cint64; (* current offset (incremented by each av_parser_parse()) *) + next_frame_offset: cint64; (* offset of the next frame *) + (* video info *) + pict_type: cint; (* XXX: put it back in AVCodecContext *) + repeat_pict: cint; (* XXX: put it back in AVCodecContext *) + pts: cint64; (* pts of the current frame *) + dts: cint64; (* dts of the current frame *) + + (* private data *) + last_pts: cint64; + last_dts: cint64; + fetch_timestamp: cint; + + cur_frame_start_index: cint; + cur_frame_offset: array [0..AV_PARSER_PTS_NB - 1] of cint64; + cur_frame_pts: array [0..AV_PARSER_PTS_NB - 1] of cint64; + cur_frame_dts: array [0..AV_PARSER_PTS_NB - 1] of cint64; + + flags: cint; + + {$IF LIBAVCODEC_VERSION >= 51040003} // 51.40.3 + offset: cint64; ///< byte offset from starting packet start + {$IFEND} + {$IF LIBAVCODEC_VERSION >= 51057001} // 51.57.1 + cur_frame_end: array [0..AV_PARSER_PTS_NB - 1] of cint64; + {$IFEND} + end; + + TAVCodecParser = record + codec_ids: array [0..4] of cint; (* several codec IDs are permitted *) + priv_data_size: cint; + parser_init: function (s: PAVCodecParserContext): cint; cdecl; + parser_parse: function (s: PAVCodecParserContext; avctx: PAVCodecContext; + poutbuf: {const} PPointer; poutbuf_size: PCint; + buf: {const} pchar; buf_size: cint): cint; cdecl; + parser_close: procedure (s: PAVCodecParserContext); cdecl; + split: function (avctx: PAVCodecContext; buf: {const} pchar; + buf_size: cint): cint; cdecl; + next: PAVCodecParser; + end; + + +{$IF LIBAVCODEC_VERSION < 52000000} // 52.0.0 +{ +var + av_first_parser: PAVCodecParser; external av__codec; +} +{$IFEND} + +{$IF LIBAVCODEC_VERSION >= 51049000} // 51.49.0 +function av_parser_next(c: PAVCodecParser): PAVCodecParser; + cdecl; external av__codec; +{$IFEND} + +procedure av_register_codec_parser (parser: PAVCodecParser); + cdecl; external av__codec; + +function av_parser_init (codec_id: cint): PAVCodecParserContext; + cdecl; external av__codec; + +function av_parser_parse (s: PAVCodecParserContext; + avctx: PAVCodecContext; + poutbuf: PPointer; poutbuf_size: PCint; + buf: {const} pchar; buf_size: cint; + pts: cint64; dts: cint64): cint; + cdecl; external av__codec; +function av_parser_change (s: PAVCodecParserContext; + avctx: PAVCodecContext; + poutbuf: PPointer; poutbuf_size: PCint; + buf: {const} pchar; buf_size: cint; keyframe: cint): cint; + cdecl; external av__codec; +procedure av_parser_close (s: PAVCodecParserContext); + cdecl; external av__codec; + +type + PAVBitStreamFilterContext = ^TAVBitStreamFilterContext; + PAVBitStreamFilter = ^TAVBitStreamFilter; + + TAVBitStreamFilterContext = record + priv_data: pointer; + filter: PAVBitStreamFilter; + parser: PAVCodecParserContext; + next: PAVBitStreamFilterContext; + end; + + TAVBitStreamFilter = record + name: pchar; + priv_data_size: cint; + filter: function (bsfc: PAVBitStreamFilterContext; + avctx: PAVCodecContext; args: pchar; + poutbuf: PPointer; poutbuf_size: PCint; + buf: PByte; buf_size: cint; keyframe: cint): cint; cdecl; + {$IF LIBAVCODEC_VERSION >= 51043000} // 51.43.0 + close: procedure (bsfc: PAVBitStreamFilterContext); + {$IFEND} + next: PAVBitStreamFilter; + end; + +procedure av_register_bitstream_filter (bsf: PAVBitStreamFilter); + cdecl; external av__codec; + +function av_bitstream_filter_init (name: pchar): PAVBitStreamFilterContext; + cdecl; external av__codec; + +function av_bitstream_filter_filter (bsfc: PAVBitStreamFilterContext; + avctx: PAVCodecContext; args: pchar; + poutbuf: PPointer; poutbuf_size: PCint; + buf: PByte; buf_size: cint; keyframe: cint): cint; + cdecl; external av__codec; +procedure av_bitstream_filter_close (bsf: PAVBitStreamFilterContext); + cdecl; external av__codec; + +{$IF LIBAVCODEC_VERSION >= 51049000} // 51.49.0 +function av_bitstream_filter_next(f: PAVBitStreamFilter): PAVBitStreamFilter; + cdecl; external av__codec; +{$IFEND} + +(* memory *) + +(** + * Reallocates the given block if it is not large enough, otherwise it + * does nothing. + * + * @see av_realloc + *) +procedure av_fast_realloc (ptr: pointer; size: PCuint; min_size: cuint); + cdecl; external av__codec; + + +{$IF LIBAVCODEC_VERSION < 51057000} // 51.57.0 +(* for static data only *) + +(** + * Frees all static arrays and resets their pointers to 0. + * Call this function to release all statically allocated tables. + * + * @deprecated. Code which uses av_free_static is broken/misdesigned + * and should correctly use static arrays + * + *) +procedure av_free_static (); + cdecl; external av__codec; deprecated; + +(** + * Allocation of static arrays. + * + * @warning Do not use for normal allocation. + * + * @param[in] size The amount of memory you need in bytes. + * @return block of memory of the requested size + * @deprecated. Code which uses av_mallocz_static is broken/misdesigned + * and should correctly use static arrays + *) +procedure av_mallocz_static(size: cuint); + cdecl; external av__codec; deprecated; {av_malloc_attrib av_alloc_size(1)} +{$IFEND} + +{$IF LIBAVCODEC_VERSION < 51035000} // 51.35.0 +procedure av_realloc_static(ptr: pointer; size: cuint); + cdecl; external av__codec; +{$IFEND} + +{$IF LIBAVCODEC_VERSION >= 51039000} // 51.39.0 +(** + * Copy image 'src' to 'dst'. + *) +procedure av_picture_copy(dst: PAVPicture; src: {const} PAVPicture; + pix_fmt: cint; width: cint; height: cint); + cdecl; external av__codec; + +(** + * Crop image top and left side. + *) +function av_picture_crop(dst: PAVPicture; src: {const} PAVPicture; + pix_fmt: cint; top_band: cint; left_band: cint): cint; + cdecl; external av__codec; + +(** + * Pad image. + *) +function av_picture_pad(dst: PAVPicture; src: {const} PAVPicture; height: cint; width: cint; pix_fmt: cint; + padtop: cint; padbottom: cint; padleft: cint; padright: cint; color: PCint): cint; + cdecl; external av__codec; +{$IFEND} + +{$IF LIBAVCODEC_VERSION < 52000000} // 52.0.0 +(** + * @deprecated Use the software scaler (swscale) instead. + *) +procedure img_copy (dst: PAVPicture; src: {const} PAVPicture; + pix_fmt: TAVPixelFormat; width: cint; height: cint); + cdecl; external av__codec; deprecated; + +(** + * @deprecated Use the software scaler (swscale) instead. + *) +function img_crop (dst: PAVPicture; src: {const} PAVPicture; + pix_fmt: TAVPixelFormat; top_band, left_band: cint): cint; + cdecl; external av__codec; deprecated; + +(** + * @deprecated Use the software scaler (swscale) instead. + *) +function img_pad (dst: PAVPicture; src: {const} PAVPicture; height, width: cint; + pix_fmt: TAVPixelFormat; padtop, padbottom, padleft, padright: cint; + color: PCint): cint; + cdecl; external av__codec; deprecated; +{$IFEND} + +function av_xiphlacing(s: PByte; v: cuint): cuint; + cdecl; external av__codec; + +{$IF LIBAVCODEC_VERSION >= 51041000} // 51.41.0 +(** + * Parses \p str and put in \p width_ptr and \p height_ptr the detected values. + * + * @return 0 in case of a successful parsing, a negative value otherwise + * @param[in] str the string to parse: it has to be a string in the format + * <width>x<height> or a valid video frame size abbreviation. + * @param[in,out] width_ptr pointer to the variable which will contain the detected + * frame width value + * @param[in,out] height_ptr pointer to the variable which will contain the detected + * frame height value + *) +function av_parse_video_frame_size(width_ptr: PCint; height_ptr: PCint; str: {const} PChar): cint; + cdecl; external av__codec; + +(** + * Parses \p str and put in \p frame_rate the detected values. + * + * @return 0 in case of a successful parsing, a negative value otherwise + * @param[in] str the string to parse: it has to be a string in the format + * <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation + * @param[in,out] frame_rate pointer to the AVRational which will contain the detected + * frame rate + *) +function av_parse_video_frame_rate(frame_rate: PAVRational; str: {const} PChar): cint; + cdecl; external av__codec; +{$IFEND} + +{* error handling *} + +const +{$IFDEF UNIX} + ENOENT = ESysENOENT; + EIO = ESysEIO; + ENOMEM = ESysENOMEM; + EINVAL = ESysEINVAL; + EDOM = ESysEDOM; + ENOSYS = ESysENOSYS; + EILSEQ = ESysEILSEQ; +{$ELSE} + ENOENT = 2; + EIO = 5; + ENOMEM = 12; + EINVAL = 22; + EDOM = 33; + {$IFDEF MSWINDOWS} + // Note: we assume that ffmpeg was compiled with MinGW. + // This must be changed if DLLs were compiled with cygwin. + ENOSYS = 40; // MSVC/MINGW: 40, CYGWIN: 88, LINUX/FPC: 38 + EILSEQ = 42; // MSVC/MINGW: 42, CYGWIN: 138, LINUX/FPC: 84 + {$ENDIF} +{$ENDIF} + +const +{$IF EINVAL > 0} + AVERROR_SIGN = -1; +{$ELSE} + {* Some platforms have E* and errno already negated. *} + AVERROR_SIGN = 1; +{$IFEND} + +(* +#if EINVAL > 0 +#define AVERROR(e) (-(e)) {**< Returns a negative error code from a POSIX error code, to return from library functions. *} +#define AVUNERROR(e) (-(e)) {**< Returns a POSIX error code from a library function error return value. *} +#else +{* Some platforms have E* and errno already negated. *} +#define AVERROR(e) (e) +#define AVUNERROR(e) (e) +#endif +*) + +const + AVERROR_UNKNOWN = AVERROR_SIGN * EINVAL; (**< unknown error *) + AVERROR_IO = AVERROR_SIGN * EIO; (**< I/O error *) + AVERROR_NUMEXPECTED = AVERROR_SIGN * EDOM; (**< Number syntax expected in filename. *) + AVERROR_INVALIDDATA = AVERROR_SIGN * EINVAL; (**< invalid data found *) + AVERROR_NOMEM = AVERROR_SIGN * ENOMEM; (**< not enough memory *) + AVERROR_NOFMT = AVERROR_SIGN * EILSEQ; (**< unknown format *) + AVERROR_NOTSUPP = AVERROR_SIGN * ENOSYS; (**< Operation not supported. *) + AVERROR_NOENT = AVERROR_SIGN * ENOENT; {**< No such file or directory. *} + // Note: function calls as constant-initializers are invalid + //AVERROR_PATCHWELCOME = -MKTAG('P','A','W','E'); {**< Not yet implemented in FFmpeg. Patches welcome. *} + AVERROR_PATCHWELCOME = -(ord('P') or (ord('A') shl 8) or (ord('W') shl 16) or (ord('E') shl 24)); + +implementation + +end. |