(*
* 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: 52.11.0, revision 16912, Sun Feb 1 02:00:19 2009 UTC
*
* update to
* Max. version: 52.45.0, Mon Jan 4 2010 00:25:00 CET
* MiSchi
*)
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,
SysUtils,
{$IFDEF UNIX}
BaseUnix,
{$ENDIF}
UConfig;
const
(* Max. supported version by this header *)
LIBAVCODEC_MAX_VERSION_MAJOR = 52;
LIBAVCODEC_MAX_VERSION_MINOR = 45;
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)}
{$MESSAGE Error 'Linked version of libavcodec is not yet supported!'}
{$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,
CODEC_ID_TGQ,
{$IF LIBAVCODEC_VERSION >= 52012000} // >= 52.12.0
CODEC_ID_TQI,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52022002} // >= 52.22.2
CODEC_ID_AURA,
CODEC_ID_AURA2,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52027000} // >= 52.27.0
CODEC_ID_V210X,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52028000} // >= 52.28.0
CODEC_ID_TMV,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52029000} // >= 52.29.0
CODEC_ID_V210,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52030002} // >= 52.30.2
CODEC_ID_DPX,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52031002} // >= 52.31.2
CODEC_ID_MAD,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52037000} // >= 52.37.0
CODEC_ID_FRWU,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52041000} // >= 52.41.0
CODEC_ID_FLASHSV2,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52043000} // >= 52.43.0
CODEC_ID_CDGRAPHICS,
CODEC_ID_R210,
{$IFEND}
//* various PCM "codecs" */
CODEC_ID_PCM_S16LE= $10000,
CODEC_ID_PCM_S16BE,
CODEC_ID_PCM_U16LE,
CODEC_ID_PCM_U16BE,
CODEC_ID_PCM_S8,
CODEC_ID_PCM_U8,
CODEC_ID_PCM_MULAW,
CODEC_ID_PCM_ALAW,
CODEC_ID_PCM_S32LE,
CODEC_ID_PCM_S32BE,
CODEC_ID_PCM_U32LE,
CODEC_ID_PCM_U32BE,
CODEC_ID_PCM_S24LE,
CODEC_ID_PCM_S24BE,
CODEC_ID_PCM_U24LE,
CODEC_ID_PCM_U24BE,
CODEC_ID_PCM_S24DAUD,
CODEC_ID_PCM_ZORK,
CODEC_ID_PCM_S16LE_PLANAR,
CODEC_ID_PCM_DVD,
CODEC_ID_PCM_F32BE,
CODEC_ID_PCM_F32LE,
CODEC_ID_PCM_F64BE,
CODEC_ID_PCM_F64LE,
{$IF LIBAVCODEC_VERSION >= 52034000} // >= 52.34.0
CODEC_ID_PCM_BLURAY,
{$IFEND}
//* 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,
CODEC_ID_ADPCM_IMA_ISS,
//* 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
{$IFEND}
CODEC_ID_AC3,
CODEC_ID_DTS,
CODEC_ID_VORBIS,
CODEC_ID_DVAUDIO,
CODEC_ID_WMAV1,
CODEC_ID_WMAV2,
CODEC_ID_MACE3,
CODEC_ID_MACE6,
CODEC_ID_VMDAUDIO,
CODEC_ID_SONIC,
CODEC_ID_SONIC_LS,
CODEC_ID_FLAC,
CODEC_ID_MP3ADU,
CODEC_ID_MP3ON4,
CODEC_ID_SHORTEN,
CODEC_ID_ALAC,
CODEC_ID_WESTWOOD_SND1,
CODEC_ID_GSM, ///< as in Berlin toast format
CODEC_ID_QDM2,
CODEC_ID_COOK,
CODEC_ID_TRUESPEECH,
CODEC_ID_TTA,
CODEC_ID_SMACKAUDIO,
CODEC_ID_QCELP,
CODEC_ID_WAVPACK,
CODEC_ID_DSICINAUDIO,
CODEC_ID_IMC,
CODEC_ID_MUSEPACK7,
CODEC_ID_MLP,
CODEC_ID_GSM_MS, { as found in WAV }
CODEC_ID_ATRAC3,
CODEC_ID_VOXWARE,
CODEC_ID_APE,
CODEC_ID_NELLYMOSER,
CODEC_ID_MUSEPACK8,
CODEC_ID_SPEEX,
CODEC_ID_WMAVOICE,
CODEC_ID_WMAPRO,
CODEC_ID_WMALOSSLESS,
CODEC_ID_ATRAC3P,
CODEC_ID_EAC3,
CODEC_ID_SIPR,
CODEC_ID_MP1,
{$IF LIBAVCODEC_VERSION >= 52020000} // >= 52.20.0
CODEC_ID_TWINVQ,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52022000} // >= 52.22.0
CODEC_ID_TRUEHD,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52026000} // >= 52.26.0
CODEC_ID_MP4ALS,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52035000} // >= 52.35.0
CODEC_ID_ATRAC1,
{$IFEND}
//* subtitle codecs */
CODEC_ID_DVD_SUBTITLE= $17000,
CODEC_ID_DVB_SUBTITLE,
CODEC_ID_TEXT, ///< raw UTF-8 text
CODEC_ID_XSUB,
CODEC_ID_SSA,
CODEC_ID_MOV_TEXT,
{$IF LIBAVCODEC_VERSION >= 52033000} // >= 52.33.0
CODEC_ID_HDMV_PGS_SUBTITLE,
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52037001} // >= 52.37.1
CODEC_ID_DVB_TELETEXT,
{$IFEND}
(* 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
);
{**
* all in native endian
*}
type
TSampleFormat = (
SAMPLE_FMT_NONE = -1,
SAMPLE_FMT_U8, ///< unsigned 8 bits
SAMPLE_FMT_S16, ///< signed 16 bits
SAMPLE_FMT_S32, ///< signed 32 bits
SAMPLE_FMT_FLT, ///< float
SAMPLE_FMT_DBL, ///< double
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
{* Audio channel masks *}
CH_FRONT_LEFT = $00000001;
CH_FRONT_RIGHT = $00000002;
CH_FRONT_CENTER = $00000004;
CH_LOW_FREQUENCY = $00000008;
CH_BACK_LEFT = $00000010;
CH_BACK_RIGHT = $00000020;
CH_FRONT_LEFT_OF_CENTER = $00000040;
CH_FRONT_RIGHT_OF_CENTER = $00000080;
CH_BACK_CENTER = $00000100;
CH_SIDE_LEFT = $00000200;
CH_SIDE_RIGHT = $00000400;
CH_TOP_CENTER = $00000800;
CH_TOP_FRONT_LEFT = $00001000;
CH_TOP_FRONT_CENTER = $00002000;
CH_TOP_FRONT_RIGHT = $00004000;
CH_TOP_BACK_LEFT = $00008000;
CH_TOP_BACK_CENTER = $00010000;
CH_TOP_BACK_RIGHT = $00020000;
CH_STEREO_LEFT = $20000000; ///< Stereo downmix.
CH_STEREO_RIGHT = $40000000; ///< See CH_STEREO_LEFT.
{** Channel mask value used for AVCodecContext.request_channel_layout
* to indicate that the user requests the channel order of the decoder output
* to be the native codec channel order.
*}
{$IF LIBAVCODEC_VERSION >= 52038001} // >= 52.38.1
CH_LAYOUT_NATIVE = $8000000000000000;
{$IFEND}
{* Audio channel convenience macros *}
CH_LAYOUT_MONO = (CH_FRONT_CENTER);
CH_LAYOUT_STEREO = (CH_FRONT_LEFT or CH_FRONT_RIGHT);
CH_LAYOUT_SURROUND = (CH_LAYOUT_STEREO or CH_FRONT_CENTER);
{$IF LIBAVCODEC_VERSION >= 52027000} // >= 52.27.0
CH_LAYOUT_2_1 = (CH_LAYOUT_STEREO or CH_BACK_CENTER);
CH_LAYOUT_4POINT0 = (CH_LAYOUT_SURROUND or CH_BACK_CENTER);
CH_LAYOUT_2_2 = (CH_LAYOUT_STEREO or CH_SIDE_LEFT or CH_SIDE_RIGHT);
{$IFEND}
CH_LAYOUT_QUAD = (CH_LAYOUT_STEREO or CH_BACK_LEFT or CH_BACK_RIGHT);
CH_LAYOUT_5POINT0 = (CH_LAYOUT_SURROUND or CH_SIDE_LEFT or CH_SIDE_RIGHT);
CH_LAYOUT_5POINT1 = (CH_LAYOUT_5POINT0 or CH_LOW_FREQUENCY);
{$IF LIBAVCODEC_VERSION >= 52025000} // >= 52.25.0
CH_LAYOUT_5POINT0_BACK = (CH_LAYOUT_SURROUND or CH_BACK_LEFT or
CH_BACK_RIGHT);
CH_LAYOUT_5POINT1_BACK = (CH_LAYOUT_5POINT0_BACK or CH_LOW_FREQUENCY);
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52034000} // >= 52.34.0
CH_LAYOUT_7POINT0 = (CH_LAYOUT_5POINT0 or CH_BACK_LEFT or CH_BACK_RIGHT);
{$IFEND}
CH_LAYOUT_7POINT1 = (CH_LAYOUT_5POINT1 or CH_BACK_LEFT or CH_BACK_RIGHT);
{$IF LIBAVCODEC_VERSION < 52025000} // < 52.25.0
CH_LAYOUT_7POINT1_WIDE = (CH_LAYOUT_SURROUND or CH_LOW_FREQUENCY or
CH_BACK_LEFT or CH_BACK_RIGHT or
{$ELSE}
CH_LAYOUT_7POINT1_WIDE = (CH_LAYOUT_5POINT1_BACK or
{$IFEND}
CH_FRONT_LEFT_OF_CENTER or
CH_FRONT_RIGHT_OF_CENTER);
CH_LAYOUT_STEREO_DOWNMIX = (CH_STEREO_LEFT or CH_STEREO_RIGHT);
{* in bytes *}
AVCODEC_MAX_AUDIO_FRAME_SIZE = 192000; // 1 second of 48khz 32bit audio
{**
* Required number of additionally allocated bytes at the end of the input bitstream for decoding.
* This is mainly needed because some optimized bitstream readers read
* 32 or 64 bit at once and could read over the end.<br>
* Note: If the first 23 bits of the additional bytes are not 0, then damaged
* MPEG bitstreams could cause overread and segfault.
*}
FF_INPUT_BUFFER_PADDING_SIZE = 8;
{**
* minimum encoding buffer size.
* Used to avoid some checks during header writing.
*}
FF_MIN_BUFFER_SIZE = 16384;
type
{*
* motion estimation type.
*}
TMotion_Est_ID = (
ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed
ME_FULL,
ME_LOG,
ME_PHODS,
ME_EPZS, ///< enhanced predictive zonal search
ME_X1, ///< reserved for experiments
ME_HEX, ///< hexagon based search
ME_UMH, ///< uneven multi-hexagon search
ME_ITER, ///< iterative search
ME_TESA ///< transformed exhaustive search algorithm
);
TAVDiscard = (
{* We leave some space between them for extensions (drop some
* keyframes for intra-only or drop just some bidir frames).
*}
AVDISCARD_NONE = -16, ///< discard nothing
AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
AVDISCARD_NONREF = 8, ///< discard all non reference
AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
AVDISCARD_ALL = 48 ///< discard all
);
{$IF LIBAVCODEC_VERSION >= 52028000} // >= 52.28.0
TAVColorPrimaries = (
AVCOL_PRI_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
AVCOL_PRI_UNSPECIFIED = 2,
AVCOL_PRI_BT470M = 4,
AVCOL_PRI_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
AVCOL_PRI_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
AVCOL_PRI_SMPTE240M = 7, ///< functionally identical to above
AVCOL_PRI_FILM = 8,
AVCOL_PRI_NB ///< Not part of ABI
);
TAVColorTransferCharacteristic = (
AVCOL_TRC_BT709 = 1, ///< also ITU-R BT1361
AVCOL_TRC_UNSPECIFIED = 2,
AVCOL_TRC_GAMMA22 = 4, ///< also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
AVCOL_TRC_GAMMA28 = 5, ///< also ITU-R BT470BG
AVCOL_TRC_NB ///< Not part of ABI
);
TAVColorSpace = (
AVCOL_SPC_RGB = 0,
AVCOL_SPC_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
AVCOL_SPC_UNSPECIFIED = 2,
AVCOL_SPC_FCC = 4,
AVCOL_SPC_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
AVCOL_SPC_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
AVCOL_SPC_SMPTE240M = 7,
AVCOL_SPC_NB ///< Not part of ABI
);
TAVColorRange = (
AVCOL_RANGE_UNSPECIFIED = 0,
AVCOL_RANGE_MPEG = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
AVCOL_RANGE_JPEG = 2, ///< the normal 2^n-1 "JPEG" YUV ranges
AVCOL_RANGE_NB ///< Not part of ABI
);
(**
* X X 3 4 X X are luma samples,
* 1 2 1-6 are possible chroma positions
* X X 5 6 X 0 is undefined/unknown position
*)
TAVChromaLocation = (
AVCHROMA_LOC_UNSPECIFIED = 0,
AVCHROMA_LOC_LEFT = 1, ///< mpeg2/4, h264 default
AVCHROMA_LOC_CENTER = 2, ///< mpeg1, jpeg, h263
AVCHROMA_LOC_TOPLEFT = 3, ///< DV
AVCHROMA_LOC_TOP = 4,
AVCHROMA_LOC_BOTTOMLEFT = 5,
AVCHROMA_LOC_BOTTOM = 6,
AVCHROMA_LOC_NB ///< Not part of ABI
);
{$IFEND}
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 = $00020000; ///< Use a bit reservoir when encoding if possible
{$IF LIBAVCODEC_VERSION >= 52043000} // >= 52.43.0
CODEC_FLAG2_MBTREE = $00040000; ///< Use macroblock tree ratecontrol (x264 only)
{$IFEND}
(* Unsupported options :
* Syntax Arithmetic coding (SAC)
* Reference Picture Selection
* Independant Segment Decoding *)
(* /Fx *)
(* codec capabilities *)
CODEC_CAP_DRAW_HORIZ_BAND = $0001; ///< decoder can use draw_horiz_band callback
(**
* Codec uses get_buffer() for allocating buffers.
* 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;
(**
* Codec can export data for HW decoding (VDPAU).
*)
CODEC_CAP_HWACCEL_VDPAU = $0080;
{$IF LIBAVCODEC_VERSION >= 52035000} // >= 52.35.0
(**
* Codec can output multiple frames per AVPacket
*)
CODEC_CAP_SUBFRAMES = $0100;
{$IFEND}
//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 = $08; // Codec will reuse the buffer (update)
const
{$IF LIBAVCODEC_VERSION < 52000000} // < 52.0.0
DEFAULT_FRAME_RATE_BASE = 1001000;
{$IFEND}
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_IDCT_EA = 21;
FF_IDCT_SIMPLENEON = 22;
FF_IDCT_SIMPLEALPHA = 23;
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 = $0004; ///< AMD 3DNOW
{$IF LIBAVCODEC_MAX_VERSION_MAJOR < 53}
FF_MM_MMXEXT = $0002; ///< SSE integer functions or AMD MMX ext
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52024000} // >= 52.24.0
FF_MM_MMX2 = $0002; ///< SSE integer functions or AMD MMX ext
{$IFEND}
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 = $0080; ///< Conroe SSSE3 functions
{$IF LIBAVCODEC_VERSION >= 52022003} // >= 52.22.3
FF_MM_SSE4 = $0100; ///< Penryn SSE4.1 functions
FF_MM_SSE42 = $0200; ///< Nehalem SSE4.2 functions
{$IFEND}
FF_MM_IWMMXT = $0100; ///< XScale IWMMXT
FF_MM_ALTIVEC = $0001; ///< standard AltiVec
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 = $100; (* Analyse b16x8, b8x16 and b8x8 *)
FF_COMPRESSION_DEFAULT = -1;
{$IF LIBAVCODEC_MAX_VERSION_MAJOR < 53}
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;}
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52023000} // >= 52.23.0
type
PAVPacket = ^TAVPacket;
TAVPacket = record
(*
* Presentation timestamp in AVStream->time_base units; the time at which
* the decompressed packet will be presented to the user.
* Can be AV_NOPTS_VALUE if it is not stored in the file.
* pts MUST be larger or equal to dts as presentation cannot happen before
* decompression, unless one wants to view hex dumps. Some formats misuse
* the terms dts and pts/cts to mean something different. Such timestamps
* must be converted to true pts/dts before they are stored in AVPacket.
*)
pts: cint64;
(*
* Decompression timestamp in AVStream->time_base units; the time at which
* the packet is decompressed.
* Can be AV_NOPTS_VALUE if it is not stored in the file.
*)
dts: cint64;
data: PByteArray;
size: cint;
stream_index: cint;
flags: cint;
(*
* Duration of this packet in AVStream->time_base units, 0 if unknown.
* Equals next_pts - this_pts in presentation order.
*)
duration: cint;
destruct: procedure (para1: PAVPacket); cdecl;
priv: pointer;
pos: cint64; // byte position in stream, -1 if unknown
(*
* Time difference in AVStream->time_base units from the pts of this
* packet to the point at which the output from the decoder has converged
* independent from the availability of previous frames. That is, the
* frames are virtually identical no matter if decoding started from
* the very first frame or from this keyframe.
* Is AV_NOPTS_VALUE if unknown.
* This field is not the display duration of the current packet.
*
* The purpose of this field is to allow seeking in streams that have no
* keyframes in the conventional sense. It corresponds to the
* recovery point SEI in H.264 and match_time_delta in NUT. It is also
* essential for some types of subtitle streams to ensure that all
* subtitles are correctly displayed after seeking.
*)
convergence_duration: cint64;
end;
const
{$IF LIBAVCODEC_VERSION < 52030002} // < 52.30.2
PKT_FLAG_KEY = $0001;
{$ELSE}
AV_PKT_FLAG_KEY = $0001;
{$IF LIBAVCODEC_VERSION_MAJOR < 53}
PKT_FLAG_KEY = AV_PKT_FLAG_KEY;
{$IFEND}
{$IFEND}
{$IFEND}
type
PAVClass = ^TAVClass; {const}
PAVCodecContext = ^TAVCodecContext;
PAVCodec = ^TAVCodec;
{$IF LIBAVCODEC_VERSION >= 52018000} // >= 52.18.0
PAVHWAccel = ^TAVHWAccel;
{$IFEND}
// int[4]
PQuadIntArray = ^TQuadIntArray;
TQuadIntArray = array[0..3] of cint;
// int (*func)(struct AVCodecContext *c2, void *arg)
TExecuteFunc = function(c2: PAVCodecContext; arg: Pointer): cint; cdecl;
{$IF LIBAVCODEC_VERSION >= 52037000} // >= 52.37.0
// int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr)
TExecute2Func = function(c2: PAVCodecContext; arg: Pointer; jobnr: cint; threadnr: cint): cint; cdecl;
{$IFEND}
TAVClass = record
class_name: PAnsiChar;
(* 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(): PAnsiChar; cdecl;
option: PAVOption;
end;
{**
* 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.
* Set to 4 for delayed, non-reference frames.
* - encoding: unused
* - decoding: Set by libavcodec. (before get_buffer() call)).
*)
reference: cint;
(**
* QP table
* - encoding: unused
* - decoding: Set by libavcodec.
*)
qscale_table: PShortint;
(**
* QP store stride
* - encoding: unused
* - decoding: Set by libavcodec.
*)
qstride: cint;
(**
* 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;
{$IF LIBAVCODEC_VERSION >= 51068000} // >= 51.68.0
(**
* reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque
* output in AVFrame.reordered_opaque
* - encoding: unused
* - decoding: Read by user.
*)
reordered_opaque: cint64;
{$IFEND}
{$IF LIBAVCODEC_VERSION = 52021000} // = 52.21.0
(**
* hardware accelerator private data (FFmpeg allocated)
* - encoding: unused
* - decoding: Set by libavcodec
*)
hwaccel_data_private: pointer;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52022000} // >= 52.22.0
hwaccel_picture_private: pointer;
{$IFEND}
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.
* The function is also used by hardware acceleration APIs.
* It is called at least once during frame decoding to pass
* the data needed for hardware render.
* In that mode instead of pixel data, AVFrame points to
* a structure specific to the acceleration API. The application
* reads the structure and can change some fields to indicate progress
* or mark state.
* - encoding: unused
* - decoding: Set by user.
* @param height the height of the slice
* @param y the y position of the slice
* @param type 1->top field, 2->bottom field, 3->frame
* @param offset offset into the AVFrame.data from which the slice should be read
*)
draw_horiz_band: procedure (s: PAVCodecContext;
src: {const} PAVFrame; offset: 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
(* 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
{$IF LIBAVCODEC_MAX_VERSION_MAJOR < 53}
real_pict_num: cint; ///< returns the real picture number of previous encoded frame
{$IFEND}
(**
* Number of frames the decoded output will be delayed relative to
* the encoded input.
* - encoding: Set by libavcodec.
* - decoding: unused
*)
delay: cint;
(* - encoding parameters *)
qcompress: cfloat; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
qblur: cfloat; ///< amount of qscale smoothing over time (0.0-1.0)
(**
* minimum quantizer
* - encoding: Set by user.
* - decoding: unused
*)
qmin: cint;
(**
* maximum quantizer
* - encoding: Set by user.
* - decoding: unused
*)
qmax: cint;
(**
* maximum quantizer difference between frames
* - encoding: Set by user.
* - decoding: unused
*)
max_qdiff: cint;
(**
* maximum number of B-frames between non-B-frames
* Note: The output will be delayed by max_b_frames+1 relative to the input.
* - encoding: Set by user.
* - decoding: unused
*)
max_b_frames: cint;
(**
* qscale factor between IP and B-frames
* If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
* If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
* - encoding: Set by user.
* - decoding: unused
*)
b_quant_factor: cfloat;
(** obsolete FIXME remove *)
rc_strategy: cint;
b_frame_strategy: cint;
(**
* hurry up amount
* - encoding: unused
* - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
* @deprecated Deprecated in favor of skip_idct and skip_frame.
*)
hurry_up: cint;
codec: PAVCodec;
priv_data: pointer;
{$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 AnsiChar;
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 recognization; higher values will detect more errors but may
* misdetect some more or less valid parts as errors.
* - encoding: unused
* - decoding: Set by user.
*)
error_recognition: 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.
* if CODEC_CAP_DR1 is not set then get_buffer() must call
* avcodec_default_get_buffer() instead of providing buffers allocated by
* some other means.
* - 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;
(**
* Size of the frame reordering buffer in the decoder.
* For MPEG-2 it is 1 IPB or 0 low delay IP.
* - encoding: Set by libavcodec.
* - decoding: Set by libavcodec.
*)
has_b_frames: cint;
(**
* 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: PByteArray;
(**
* 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: PByteArray;
(**
* 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} PByteArray;
(**
* 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_coded_sample: cint;
(**
* prediction method (needed for huffyuv)
* - encoding: Set by user.
* - decoding: unused
*)
prediction_method: cint;
(**
* sample aspect ratio (0 if unknown)
* That is the width of a pixel divided by the height of the pixel.
* Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
* - encoding: Set by user.
* - decoding: Set by libavcodec.
*)
sample_aspect_ratio: TAVRational;
(**
* 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 AnsiChar; //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().
* if CODEC_CAP_DR1 is not set then reget_buffer() must call
* avcodec_default_reget_buffer() instead of providing buffers allocated by
* some other means.
* - encoding: unused
* - decoding: Set by libavcodec., user can override
*)
reget_buffer: function (c: PAVCodecContext; pic: PAVFrame): cint; cdecl;
(**
* 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.
*)
{$IF LIBAVCODEC_VERSION < 52004000} // < 52.4.0
execute: function (c: PAVCodecContext; func: TExecuteFunc; arg: PPointer; ret: PCint; count: cint): cint; cdecl;
{$ELSE}
execute: function (c: PAVCodecContext; func: TExecuteFunc; arg: Pointer; ret: PCint; count: cint; size: cint): cint; cdecl;
{$IFEND}
(**
* 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: Set by lavc.
*)
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), 3 (auto)
* - 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
{$IF LIBAVCODEC_MAX_VERSION_MAJOR < 53}
(**
* Decoder should decode to this many channels if it can (0 for default)
* - encoding: unused
* - decoding: Set by user.
* @deprecated Deprecated in favor of request_channel_layout.
*)
request_channels: cint;
{$IFEND}
{$IFEND}
{$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;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 51068000} // 51.68.0
(**
* opaque 64bit number (generally a PTS) that will be reordered and
* output in AVFrame.reordered_opaque
* - encoding: unused
* - decoding: Set by user.
*)
reordered_opaque: cint64;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 51069000} // 51.69.0
(**
* Bits per sample/pixel of internal libavcodec pixel/sample format.
* This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
* - encoding: set by user.
* - decoding: set by libavcodec.
*)
bits_per_raw_sample: cint;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52002000} // 52.2.0
(**
* Audio channel layout.
* - encoding: set by user.
* - decoding: set by libavcodec.
*)
channel_layout: cint64;
(**
* Request decoder to use this channel layout if it can (0 for default)
* - encoding: unused
* - decoding: Set by user.
*)
request_channel_layout: cint64;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52004000} // >= 52.4.0
(**
* Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
* - encoding: Set by user.
* - decoding: unused.
*)
rc_max_available_vbv_use: cfloat;
(**
* Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
* - encoding: Set by user.
* - decoding: unused.
*)
rc_min_vbv_overflow_use: cfloat;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52018000} // >= 52.18.0
(**
* Hardware accelerator in use
* - encoding: unused.
* - decoding: Set by libavcodec
*)
hwaccel: PAVHWAccel;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52020000} // >= 52.20.0
(**
* For some codecs, the time base is closer to the field rate than the frame rate.
* Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
* if no telecine is used ...
*
* Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
*)
ticks_per_frame: cint;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52021000} // >= 52.21.0
(**
* Hardware accelerator context.
* For some hardware accelerators, a global context needs to be
* provided by the user. In that case, this holds display-dependent
* data FFmpeg cannot instantiate itself. Please refer to the
* FFmpeg HW accelerator documentation to know how to fill this
* is. e.g. for VA API, this is a struct vaapi_context.
* - encoding: unused
* - decoding: Set by user
*)
hwaccel_context: pointer;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52028000} // >= 52.28.0
(**
* Chromaticity coordinates of the source primaries.
* - encoding: Set by user
* - decoding: Set by libavcodec
*)
color_primaries: TAVColorPrimaries;
(**
* Color Transfer Characteristic.
* - encoding: Set by user
* - decoding: Set by libavcodec
*)
color_trc: TAVColorTransferCharacteristic;
(**
* YUV colorspace type.
* - encoding: Set by user
* - decoding: Set by libavcodec
*)
colorspace: TAVColorSpace;
(**
* MPEG vs JPEG YUV range.
* - encoding: Set by user
* - decoding: Set by libavcodec
*)
color_range: TAVColorRange;
(**
* This defines the location of chroma samples.
* - encoding: Set by user
* - decoding: Set by libavcodec
*)
chroma_sample_location: TAVChromaLocation;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52037000} // >= 52.37.0
(**
* The codec may call this to execute several independent things.
* It will return only after finishing all tasks.
* The user may replace this with some multithreaded implementation,
* the default implementation will execute the parts serially.
* Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
* @param c context passed also to func
* @param count the number of things to execute
* @param arg2 argument passed unchanged to func
* @param ret return values of executed functions, must have space for "count" values. May be NULL.
* @param func function that will be called count times, with jobnr from 0 to count-1.
* threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
* two instances of func executing at the same time will have the same threadnr.
* @return always 0 currently, but code should handle a future improvement where when any call to func
* returns < 0 no further calls to func may be done and < 0 is returned.
* - encoding: Set by libavcodec, user can override.
* - decoding: Set by libavcodec, user can override.
*)
execute2: function (c: PAVCodecContext; func: TExecute2Func; arg2: Pointer; ret: Pcint; count: cint): cint; cdecl;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52042000} // >= 52.42.0
(**
* explicit P-frame weighted prediction analysis method
* 0: off
* 1: fast blind weighting (one reference duplicate with -1 offset)
* 2: smart weighting (full fade detection analysis)
* - encoding: Set by user.
* - decoding: unused
*)
weighted_p_pred: cint;
{$IFEND}
end;
(**
* AVCodec.
*)
TAVCodec = record
name: PAnsiChar;
type_: TCodecType;
id: TCodecID;
priv_data_size: cint;
init: function (avctx: PAVCodecContext): cint; cdecl; (* typo corretion by the Creative CAT *)
encode: function (avctx: PAVCodecContext; buf: PByteArray; buf_size: cint; data: pointer): cint; cdecl;
close: function (avctx: PAVCodecContext): cint; cdecl;
decode: function (avctx: PAVCodecContext; outdata: pointer; var outdata_size: cint;
{$IF LIBAVCODEC_VERSION < 52025000} // 52.25.0
buf: {const} PByteArray; buf_size: cint): cint; cdecl;
{$ELSE}
avpkt: PAVPacket): cint; cdecl;
{$IFEND}
(**
* 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
{$IF LIBAVCODEC_VERSION >= 51055000} // 51.55.0
(**
* Descriptive name for the codec, meant to be more human readable than name.
* You should use the NULL_IF_CONFIG_SMALL() macro to define it.
*)
long_name: {const} PAnsiChar;
{$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}
{$IF LIBAVCODEC_VERSION >= 52002000} // 52.2.0
channel_layouts: {const} PCint64; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
{$IFEND}
end;
{$IF LIBAVCODEC_VERSION >= 52018000} // 52.18.0
(**
* AVHWAccel.
*)
TAVHWAccel = record
(**
* Name of the hardware accelerated codec.
* The name is globally unique among encoders and among decoders (but an
* encoder and a decoder can share the same name).
*)
name: PAnsiChar;
(**
* Type of codec implemented by the hardware accelerator.
*
* See CODEC_TYPE_xxx
*)
type_: TCodecType;
(**
* Codec implemented by the hardware accelerator.
*
* See CODEC_ID_xxx
*)
id: TCodecID;
(**
* Supported pixel format.
*
* Only hardware accelerated formats are supported here.
*)
pix_fmt: {const} PAVPixelFormat;
(**
* Hardware accelerated codec capabilities.
* see FF_HWACCEL_CODEC_CAP_*
*)
capabilities: cint;
next: PAVCodec;
(**
* Called at the beginning of each frame or field picture.
*
* Meaningful frame information (codec specific) is guaranteed to
* be parsed at this point. This function is mandatory.
*
* Note that buf can be NULL along with buf_size set to 0.
* Otherwise, this means the whole frame is available at this point.
*
* @param avctx the codec context
* @param buf the frame data buffer base
* @param buf_size the size of the frame in bytes
* @return zero if successful, a negative value otherwise
*)
start_frame: function (avctx: PAVCodecContext;
buf: PByteArray;
buf_size: cint): cint; cdecl;
(**
* Callback for each slice.
*
* Meaningful slice information (codec specific) is guaranteed to
* be parsed at this point. This function is mandatory.
*
* @param avctx the codec context
* @param buf the slice data buffer base
* @param buf_size the size of the slice in bytes
* @return zero if successful, a negative value otherwise
*)
decode_slice: function (avctx: PAVCodecContext;
buf: PByteArray;
buf_size: cint): cint; cdecl;
(**
* Called at the end of each frame or field picture.
*
* The whole picture is parsed at this point and can now be sent
* to the hardware accelerator. This function is mandatory.
*
* @param avctx the codec context
* @return zero if successful, a negative value otherwise
*)
end_frame: function (avctx: PAVCodecContext): cint; cdecl;
{$IF LIBAVCODEC_VERSION >= 52021000} // >= 52.21.0
(**
* Size of HW accelerator private data.
*
* Private data is allocated with av_mallocz() before
* AVCodecContext.get_buffer() and deallocated after
* AVCodecContext.release_buffer().
*)
priv_data_size: cint;
{$IFEND}
end;
{$IFEND}
(**
* four components are given, that's all.
* the last component is alpha
*)
PAVPicture = ^TAVPicture;
TAVPicture = record
data: array [0..3] of PByteArray;
linesize: array [0..3] of cint; ///< number of bytes per line
end;
type
TAVSubtitleType = (
SUBTITLE_NONE,
SUBTITLE_BITMAP, ///< A bitmap, pict will be set
(**
* Plain text, the text field must be set by the decoder and is
* authoritative. ass and pict fields may contain approximations.
*)
SUBTITLE_TEXT,
(**
* Formatted text, the ass field must be set by the decoder and is
* authoritative. pict and text fields may contain approximations.
*)
SUBTITLE_ASS
);
type
PPAVSubtitleRect = ^PAVSubtitleRect;
PAVSubtitleRect = ^TAVSubtitleRect;
{$IF LIBAVCODEC_VERSION < 52010000} // < 52.10.0
TAVSubtitleRect = record
x: cuint16;
y: cuint16;
w: cuint16;
h: cuint16;
nb_colors: cuint16;
linesize: cint;
rgba_palette: PCuint32;
bitmap: PCuint8;
end;
{$ELSE}
TAVSubtitleRect = record
x: cint; ///< top left corner of pict, undefined when pict is not set
y: cint; ///< top left corner of pict, undefined when pict is not set
w: cint; ///< width of pict, undefined when pict is not set
h: cint; ///< height of pict, undefined when pict is not set
nb_colors: cint; ///< number of colors in pict, undefined when pict is not set
(**
* data+linesize for the bitmap of this subtitle.
* can be set for text/ass as well once they where rendered
*)
pict: TAVPicture;
type_: TAVSubtitleType;
text: PAnsiChar; ///< 0 terminated plain UTF-8 text
(**
* 0 terminated ASS/SSA compatible event line.
* The pressentation of this is unaffected by the other values in this
* struct.
*)
ass: PByteArray;
end;
{$IFEND}
PPAVSubtitle = ^PAVSubtitle;
PAVSubtitle = ^TAVSubtitle;
TAVSubtitle = record
format: cuint16; (* 0 = graphics *)
start_display_time: cuint32; (* relative to packet pts, in ms *)
end_display_time: cuint32; (* relative to packet pts, in ms *)
num_rects: cuint;
{$IF LIBAVCODEC_VERSION < 52010000} // < 52.10.0
rects: PAVSubtitleRect;
{$ELSE}
rects: PPAVSubtitleRect;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52032000} // >= 52.32.0
pts: cint64; ///< Same as packet pts, in AV_TIME_BASE
{$IFEND}
end;
{$IF LIBAVCODEC_VERSION >= 52025000} // 52.25.0
{ packet functions }
(**
* @deprecated use NULL instead
*)
procedure av_destruct_packet_nofree(pkt: PAVPacket);
cdecl; external av__codec;
(*
* Default packet destructor.
*)
procedure av_destruct_packet(pkt: PAVPacket);
cdecl; external av__codec;
(*
* Initialize optional fields of a packet with default values.
*
* @param pkt packet
*)
procedure av_init_packet(var pkt: TAVPacket);
cdecl; external av__codec;
(*
* Allocate the payload of a packet and initialize its fields with
* default values.
*
* @param pkt packet
* @param size wanted payload size
* @return 0 if OK, AVERROR_xxx otherwise
*)
function av_new_packet(pkt: PAVPacket; size: cint): cint;
cdecl; external av__codec;
(*
* Reduce packet size, correctly zeroing padding
*
* @param pkt packet
* @param size new size
*)
procedure av_shrink_packet(pkt: PAVPacket; size: cint);
cdecl; external av__codec;
(*
* @warning This is a hack - the packet memory allocation stuff is broken. The
* packet is allocated if it was not really allocated.
*)
function av_dup_packet(pkt: PAVPacket): cint;
cdecl; external av__codec;
(*
* Free a packet.
*
* @param pkt packet to free
*)
procedure av_free_packet(pkt: PAVPacket);
{$IF LIBAVCODEC_VERSION >= 52028000} // 52.28.0
cdecl; external av__codec;
{$IFEND}
{$IFEND}
(* resample.c *)
type
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;
(**
* Initializes an audio resampler.
* Note, if either rate is not an integer then simply scale both rates up so they are.
* @param filter_length length of each FIR filter in the filterbank relative to the cutoff freq
* @param log2_phase_count log2 of the number of entries in the polyphase filterbank
* @param linear If 1 then the used FIR filter will be linearly interpolated
between the 2 closest, if 0 the closest will be used
* @param cutoff cutoff frequency, 1.0 corresponds to half the output sampling rate
*)
function av_resample_init (out_rate: cint; in_rate: cint; filter_length: cint;
log2_phase_count: cint; linear: cint; cutoff: cdouble): PAVResampleContext;
cdecl; external av__codec;
(**
* resamples.
* @param src an array of unconsumed samples
* @param consumed the number of samples of src which have been consumed are returned here
* @param src_size the number of unconsumed samples available
* @param dst_size the amount of space in samples available in dst
* @param update_ctx If this is 0 then the context will not be modified, that way several channels can be resampled with the same context.
* @return the number of samples written in dst or -1 if an error occurred
*)
function av_resample (c: PAVResampleContext; dst: PSmallint; src: PSmallint; var consumed: cint;
src_size: cint; dst_size: cint; update_ctx: cint): cint;
cdecl; external av__codec;
(**
* Compensates samplerate/timestamp drift. The compensation is done by changing
* the resampler parameters, so no audible clicks or similar distortions occur
* @param compensation_distance distance in output samples over which the compensation should be performed
* @param sample_delta number of output samples which should be output less
*
* example: av_resample_compensate(c, 10, 500)
* here instead of 510 samples only 500 samples would be output
*
* note, due to rounding the actual compensation might be slightly different,
* especially if the compensation_distance is large and the in_rate used during init is small
*)
procedure av_resample_compensate (c: PAVResampleContext; sample_delta: cint;
compensation_distance: cint);
cdecl; external av__codec;
procedure av_resample_close (c: PAVResampleContext);
cdecl; external av__codec;
{$IF LIBAVCODEC_VERSION < 52000000} // 52.0.0
(* YUV420 format is assumed ! *)
(**
* @deprecated Use the software scaler (swscale) instead.
*)
function img_resample_init (output_width: cint; output_height: cint;
input_width: cint; input_height: cint): PImgReSampleContext;
cdecl; external av__codec; deprecated;
(**
* @deprecated Use the software scaler (swscale) instead.
*)
function img_resample_full_init (owidth: cint; oheight: cint;
iwidth: cint; iheight: cint;
topBand: cint; bottomBand: cint;
leftBand: cint; rightBand: cint;
padtop: cint; padbottom: cint;
padleft: cint; padright: cint): PImgReSampleContext;
cdecl; external av__codec; deprecated;
(**
* @deprecated Use the software scaler (swscale) instead.
*)
procedure img_resample (s: PImgReSampleContext; output: PAVPicture; input: {const} PAVPicture);
cdecl; external av__codec; deprecated;
(**
* @deprecated Use the software scaler (swscale) instead.
*)
procedure img_resample_close (s: PImgReSampleContext);
cdecl; external av__codec; deprecated;
{$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.
* Call with ptr == NULL to get the required size for the ptr buffer.
*
* @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: PByteArray; dest_size: cint): cint;
cdecl; external av__codec;
(**
* Calculate the size in bytes that a picture of the given width and height
* would occupy if stored in the given picture format.
* Note that this returns the size of a compact representation as generated
* by avpicture_layout, which can be smaller than the size required for e.g.
* avpicture_fill.
*
* @param pix_fmt the given picture format
* @param width the width of the image
* @param height the height of the image
* @return Image data size in bytes or -1 on error (e.g. too large dimensions).
*)
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;
(**
* Returns the pixel format corresponding to the name \p name.
*
* If there is no pixel format with name \p name, then looks for a
* pixel format with the name corresponding to the native endian
* format of \p name.
* For example in a little-endian system, first looks for "gray16",
* then for "gray16le".
*
* Finally if no pixel format has been found, returns \c PIX_FMT_NONE.
*)
function avcodec_get_pix_fmt_name(pix_fmt: TAVPixelFormat): PAnsiChar;
cdecl; external av__codec;
procedure avcodec_set_dimensions(s: PAVCodecContext; width: cint; height: cint);
cdecl; external av__codec;
(**
* Returns the pixel format corresponding to the name name.
*
* If there is no pixel format with name name, then looks for a
* pixel format with the name corresponding to the native endian
* format of name.
* For example in a little-endian system, first looks for "gray16",
* then for "gray16le".
*
* Finally if no pixel format has been found, returns PIX_FMT_NONE.
*)
function avcodec_get_pix_fmt(name: {const} PAnsiChar): TAVPixelFormat;
cdecl; external av__codec;
(**
* Returns a value representing the fourCC code associated to the
* pixel format pix_fmt, or 0 if no associated fourCC code can be
* found.
*)
function avcodec_pix_fmt_to_codec_tag(pix_fmt: TAVPixelFormat): cuint;
cdecl; external av__codec;
const
FF_LOSS_RESOLUTION = $0001; {**< loss due to resolution change *}
FF_LOSS_DEPTH = $0002; {**< loss due to color depth change *}
FF_LOSS_COLORSPACE = $0004; {**< loss due to color space conversion *}
FF_LOSS_ALPHA = $0008; {**< loss of alpha bits *}
FF_LOSS_COLORQUANT = $0010; {**< loss due to color quantization *}
FF_LOSS_CHROMA = $0020; {**< loss of chroma (e.g. RGB to gray conversion) *}
(**
* 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
* 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.
*)
{$IF LIBAVCODEC_VERSION >= 52000000} // 52.0.0
function avcodec_find_best_pix_fmt(pix_fmt_mask: cint64; src_pix_fmt: TAVPixelFormat;
has_alpha: cint; loss_ptr: PCint): cint;
cdecl; external av__codec;
{$ELSEIF LIBAVCODEC_VERSION < 52022001}
function avcodec_find_best_pix_fmt(pix_fmt_mask: cint; src_pix_fmt: TAVPixelFormat;
has_alpha: cint; loss_ptr: PCint): cint;
cdecl; external av__codec;
{$ELSE}
function avcodec_find_best_pix_fmt(pix_fmt_mask: cint; src_pix_fmt: TAVPixelFormat;
has_alpha: cint; loss_ptr: PCint): TAVPixelFormat;
cdecl; external av__codec;
{$IFEND}
{$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.
*)
{$IF LIBAVCODEC_VERSION < 52022001} // 52.22.1
procedure avcodec_pix_fmt_string (buf: PAnsiChar; buf_size: cint; pix_fmt: cint);
cdecl; external av__codec;
{$ELSE}
procedure avcodec_pix_fmt_string (buf: PAnsiChar; buf_size: cint; pix_fmt: TAVPixelFormat);
cdecl; external av__codec;
{$IFEND}
{$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
(**
* If c is NULL, returns the first registered codec,
* if c is non-NULL, returns the next registered codec after c,
* or NULL if c is the last one.
*)
function av_codec_next(c: 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;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52041000} // 52.41.0
(**
* Returns the libavcodec build-time configuration.
*)
function avcodec_configuration(): PAnsiChar;
cdecl; external av__codec;
(**
* Returns the libavcodec license.
*)
function avcodec_license(): PAnsiChar;
cdecl; external av__codec;
{$IFEND}
(**
* Initializes libavcodec.
*
* @warning This function must be called before any other libavcodec
* function.
*)
procedure avcodec_init();
cdecl; external av__codec;
(**
* Register the codec codec and initialize libavcodec.
*
* @see avcodec_init()
*)
{$IF LIBAVCODEC_VERSION >= 52014000} // 52.14.0
procedure avcodec_register(codec: PAVCodec);
cdecl; external av__codec;
// Deprecated in favor of avcodec_register.
procedure register_avcodec(codec: PAVCodec);
cdecl; external av__codec; deprecated;
{$ELSEIF LIBAVCODEC_VERSION_MAJOR < 53}
procedure register_avcodec(codec: PAVCodec);
cdecl; external av__codec;
{$IFEND}
(**
* 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: PAnsiChar): 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: PAnsiChar): PAVCodec;
cdecl; external av__codec;
procedure avcodec_string(buf: PAnsiChar; 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;
{$IF LIBAVCODEC_VERSION < 52004000} // < 52.4.0
function avcodec_thread_execute(s: PAVCodecContext; func: TExecuteFunc; arg: PPointer; var ret: cint; count: cint): cint;
cdecl; external av__codec;
{$ELSE}
function avcodec_thread_execute(s: PAVCodecContext; func: TExecuteFunc; arg: Pointer; var ret: cint; count: cint; size: cint): cint;
cdecl; external av__codec;
{$IFEND}
{$IF LIBAVCODEC_VERSION < 52004000} // < 52.4.0
function avcodec_default_execute(s: PAVCodecContext; func: TExecuteFunc; arg: PPointer; var ret: cint; count: cint): cint;
cdecl; external av__codec;
{$ELSE}
function avcodec_default_execute(s: PAVCodecContext; func: TExecuteFunc; arg: Pointer; var ret: cint; count: cint; size: cint): cint;
cdecl; external av__codec;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52037000} // >= 52.37.0
function avcodec_default_execute2(s: PAVCodecContext; func: TExecuteFunc; arg: Pointer; var ret: cint; count: cint): cint;
cdecl; external av__codec;
{$IFEND}
//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;
{$IF LIBAVCODEC_VERSION < 52000000} // < 52.0.0
(**
* @deprecated Use avcodec_decode_audio2 instead.
*)
function avcodec_decode_audio(avctx: PAVCodecContext; samples: PSmallint;
var frame_size_ptr: cint;
buf: {const} PByteArray; buf_size: cint): cint;
cdecl; external av__codec; {deprecated;}
{$IFEND}
{$IF LIBAVCODEC_MAX_VERSION_MAJOR < 53}
{$IF LIBAVCODEC_VERSION >= 51030000} // 51.30.0
(**
* Decodes an audio frame from buf into samples.
* Wrapper function which calls avcodec_decode_audio3.
*
* @deprecated Use avcodec_decode_audio3 instead.
* @param avctx the codec context
* @param[out] samples the output buffer, sample type in avctx->sample_fmt
* @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} PByteArray; buf_size: cint): cint;
cdecl; external av__codec; {deprecated;}
{$IFEND}
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52025000} // 52.25.0
(**
* Decodes the audio frame of size avpkt->size from avpkt->data into samples.
* Some decoders may support multiple frames in a single AVPacket, such
* decoders would then just decode the first frame. In this case,
* avcodec_decode_audio3 has to be called again with an AVPacket that contains
* the remaining data in order to decode the second frame etc.
* If no frame
* could be outputted, frame_size_ptr is zero. Otherwise, it is the
* decompressed frame size in bytes.
*
* @warning You must set frame_size_ptr to the allocated size of the
* output buffer before calling avcodec_decode_audio3().
*
* @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
* the actual read bytes because some optimized bitstream readers read 32 or 64
* bits at once and could read over the end.
*
* @warning The end of the input buffer avpkt->data should be set to 0 to ensure that
* no overreading happens for damaged MPEG streams.
*
* @note You might have to align the input buffer avpkt->data and output buffer
* samples. The alignment requirements depend on the CPU: On some CPUs it isn't
* necessary at all, on others it won't work at all if not aligned and on others
* * it will work but it will have an impact on performance.
*
* In practice, avpkt->data should have 4 byte alignment at minimum and
* samples should be 16 byte aligned unless the CPU doesn't need it
* (AltiVec and SSE do).
*
* @note Some codecs have a delay between input and output, these need to be
* fed with avpkt->data=NULL, avpkt->size=0 at the end to return the remaining frames.
*
* @param avctx the codec context
* @param[out] samples the output buffer
* @param[in,out] frame_size_ptr the output buffer size in bytes
* @param[in] avpkt The input AVPacket containing the input buffer.
* You can create such packet with av_init_packet() and by then setting
* data and size, some decoders might in addition need other fields.
* All decoders are designed to use the least fields possible though.
* @return On error a negative value is returned, otherwise the number of bytes
* used or zero if no frame data was decompressed (used) from the input AVPacket.
*)
function avcodec_decode_audio3(avctx: PAVCodecContext; samples: PSmallint;
var frame_size_ptr: cint;
avpkt: PAVPacket): cint;
cdecl; external av__codec;
{$IFEND}
{$IF LIBAVCODEC_MAX_VERSION_MAJOR < 53}
(**
* Decodes a video frame from buf into picture.
* Wrapper function which calls avcodec_decode_video2.
*
* @deprecated Use avcodec_decode_video2 instead.
* @param avctx the codec context
* @param[out] picture The AVFrame in which the decoded video frame will be stored.
* @param[in] buf the input buffer
* @param[in] buf_size the size of the input buffer in bytes
* @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
* @return On error a negative value is returned, otherwise the number of bytes
* used or zero if no frame could be decompressed.
*)
function avcodec_decode_video(avctx: PAVCodecContext; picture: PAVFrame;
var got_picture_ptr: cint;
buf: {const} PByteArray; buf_size: cint): cint;
cdecl; external av__codec; {deprecated;}
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52025000} // 52.25.0
(**
* Decodes the video frame of size avpkt->size from avpkt->data into picture.
* Some decoders may support multiple frames in a single AVPacket, such
* decoders would then just decode the first frame.
*
* @warning The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than
* the actual read bytes because some optimized bitstream readers read 32 or 64
* bits at once and could read over the end.
*
* @warning The end of the input buffer buf should be set to 0 to ensure that
* no overreading happens for damaged MPEG streams.
*
* @note You might have to align the input buffer avpkt->data.
* The alignment requirements depend on the CPU: on some CPUs it isn't
* necessary at all, on others it won't work at all if not aligned and on others
* it will work but it will have an impact on performance.
*
* In practice, avpkt->data should have 4 byte alignment at minimum.
*
* @param avctx the codec context
* @param[out] picture The AVFrame in which the decoded video frame will be stored.
* @param[in] avpkt The input AVpacket containing the input buffer.
* You can create such packet with av_init_packet() and by then setting
* data and size, some decoders might in addition need other fields like
* flags&PKT_FLAG_KEY. All decoders are designed to use the least
* fields possible.
* @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
* @return On error a negative value is returned, otherwise the number of bytes
* used or zero if no frame could be decompressed.
*)
function avcodec_decode_video2(avctx: PAVCodecContext; picture: PAVFrame;
var got_picture_ptr: cint;
avpkt: PAVPacket): cint;
cdecl; external av__codec;
{$IFEND}
{$IF LIBAVCODEC_MAX_VERSION_MAJOR < 53}
(* Decode a subtitle message. Return -1 if error, otherwise return the
* number of bytes used. If no subtitle could be decompressed,
* got_sub_ptr is zero. Otherwise, the subtitle is stored in*sub.
*)
function avcodec_decode_subtitle(avctx: PAVCodecContext; sub: PAVSubtitle;
var got_sub_ptr: cint;
buf: {const} PByteArray; buf_size: cint): cint;
cdecl; external av__codec;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52025000} // 52.25.0
(* Decodes a subtitle message.
* Returns a negative value on error, otherwise returns the number of bytes used.
* If no subtitle could be decompressed, got_sub_ptr is zero.
* Otherwise, the subtitle is stored in sub.
*
* @param avctx the codec context
* @param[out] sub The AVSubtitle in which the decoded subtitle will be stored.
* @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
* @param[in] avpkt The input AVPacket containing the input buffer.
*)
function avcodec_decode_subtitle2(avctx: PAVCodecContext; sub: PAVSubtitle;
var got_sub_ptr: cint;
avpkt: PAVPacket): cint;
cdecl; external av__codec;
{$IFEND}
function avcodec_parse_frame(avctx: PAVCodecContext; pdata: PPointer;
data_size_ptr: PCint;
buf: PByteArray; buf_size: cint): cint;
cdecl; external av__codec;
(**
* Encodes an audio frame from samples into buf.
*
* @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
* However, for PCM audio the user will know how much space is needed
* because it depends on the value passed in buf_size as described
* below. In that case a lower value can be used.
*
* @param avctx the codec context
* @param[out] buf the output buffer
* @param[in] buf_size the output buffer size
* @param[in] samples the input buffer containing the samples
* The number of samples read from this buffer is frame_size*channels,
* both of which are defined in avctx.
* For PCM audio the number of samples read from samples is equal to
* 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 pict into buf.
* The input picture should be
* stored using a specific format, namely avctx.pix_fmt.
*
* @param avctx the codec context
* @param[out] buf the output buffer for the bitstream of encoded frame
* @param[in] buf_size the size of the output buffer in bytes
* @param[in] pict the input picture to encode
* @return On error a negative value is returned, on success zero or the number
* of bytes used from the output buffer.
*)
function avcodec_encode_video(avctx: PAVCodecContext; buf: PByte;
buf_size: cint; pict: PAVFrame): cint;
cdecl; external av__codec;
function avcodec_encode_subtitle(avctx: PAVCodecContext; buf: PByteArray;
buf_size: cint; sub: {const} PAVSubtitle): cint;
cdecl; external av__codec;
function avcodec_close(avctx: PAVCodecContext): cint;
cdecl; external av__codec;
(**
* Register all the codecs, parsers and bitstream filters which were enabled at
* configuration time. If you do not call this function you can select exactly
* which formats you want to support, by using the individual registration
* functions.
*
* @see register_avcodec
* @see avcodec_register
* @see av_register_codec_parser
* @see av_register_bitstream_filter
*)
procedure avcodec_register_all();
cdecl; external av__codec;
(**
* 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 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): AnsiChar;
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 = $0001;
type
{* frame parsing *}
PAVCodecParserContext = ^TAVCodecParserContext;
PAVCodecParser = ^TAVCodecParser;
TAVCodecParserContext = record
priv_data: pointer;
parser: PAVCodecParser;
frame_offset: cint64; (* offset of the current frame *)
cur_offset: cint64; (* current offset (incremented by each av_parser_parse()) *)
next_frame_offset: cint64; (* offset of the next frame *)
(* video info *)
pict_type: cint; (* XXX: put it back in AVCodecContext *)
(**
* This field is used for proper frame duration computation in lavf.
* It signals, how much longer the frame duration of the current frame
* is compared to normal frame duration.
*
* frame_duration = (1 + repeat_pict) * time_base
*
* It is used by codecs like H.264 to display telecined material.
*)
repeat_pict: cint; (* XXX: put it back in AVCodecContext *)
pts: cint64; (* pts of the current frame *)
dts: cint64; (* dts of the current frame *)
(* private data *)
last_pts: cint64;
last_dts: cint64;
fetch_timestamp: cint;
cur_frame_start_index: cint;
cur_frame_offset: array [0..AV_PARSER_PTS_NB - 1] of cint64;
cur_frame_pts: array [0..AV_PARSER_PTS_NB - 1] of cint64;
cur_frame_dts: array [0..AV_PARSER_PTS_NB - 1] of cint64;
flags: cint;
{$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;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52016000} // 52.16.0
(*!
* Set by parser to 1 for key frames and 0 for non-key frames.
* It is initialized to -1, so if the parser doesn't set this flag,
* old-style fallback using FF_I_TYPE picture type as key frames
* will be used.
*)
key_frame: cint;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52018000} // 52.18.0
(**
* Time difference in stream time base units from the pts of this
* packet to the point at which the output from the decoder has converged
* independent from the availability of previous frames. That is, the
* frames are virtually identical no matter if decoding started from
* the very first frame or from this keyframe.
* Is AV_NOPTS_VALUE if unknown.
* This field is not the display duration of the current frame.
*
* The purpose of this field is to allow seeking in streams that have no
* keyframes in the conventional sense. It corresponds to the
* recovery point SEI in H.264 and match_time_delta in NUT. It is also
* essential for some types of subtitle streams to ensure that all
* subtitles are correctly displayed after seeking.
*)
convergence_duration: cint64;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52019000} // 52.19.0
// Timestamp generation support:
(**
* Synchronization point for start of timestamp generation.
*
* Set to >0 for sync point, 0 for no sync point and <0 for undefined
* (default).
*
* For example, this corresponds to presence of H.264 buffering period
* SEI message.
*)
dts_sync_point: cint;
(**
* Offset of the current timestamp against last timestamp sync point in
* units of AVCodecContext.time_base.
*
* Set to INT_MIN when dts_sync_point unused. Otherwise, it must
* contain a valid timestamp offset.
*
* Note that the timestamp of sync point has usually a nonzero
* dts_ref_dts_delta, which refers to the previous sync point. Offset of
* the next frame after timestamp sync point will be usually 1.
*
* For example, this corresponds to H.264 cpb_removal_delay.
*)
dts_ref_dts_delta: cint;
(**
* Presentation delay of current frame in units of AVCodecContext.time_base.
*
* Set to INT_MIN when dts_sync_point unused. Otherwise, it must
* contain valid non-negative timestamp delta (presentation time of a frame
* must not lie in the past).
*
* This delay represents the difference between decoding and presentation
* time of the frame.
*
* For example, this corresponds to H.264 dpb_output_delay.
*)
pts_dts_delta: cint;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52021000} // 52.21.0
(**
* Position of the packet in file.
*
* Analogous to cur_frame_pts/dts
*)
cur_frame_pos: array [0..AV_PARSER_PTS_NB - 1] of cint64;
(**
* Byte position of currently parsed frame in stream.
*)
pos: cint64;
(**
* Previous frame byte position.
*)
last_pos: cint64;
{$IFEND}
end;
TAVCodecParser = record
codec_ids: array [0..4] of cint; (* several codec IDs are permitted *)
priv_data_size: cint;
parser_init: function(s: PAVCodecParserContext): cint; cdecl;
parser_parse: function(s: PAVCodecParserContext;
avctx: PAVCodecContext;
poutbuf: {const} PPointer; poutbuf_size: PCint;
buf: {const} PByteArray; buf_size: cint): cint; cdecl;
parser_close: procedure(s: PAVCodecParserContext); cdecl;
split: function(avctx: PAVCodecContext; buf: {const} PByteArray;
buf_size: cint): cint; cdecl;
next: PAVCodecParser;
end;
{$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;
{$IFEND}
procedure av_register_codec_parser(parser: PAVCodecParser);
cdecl; external av__codec;
function av_parser_init(codec_id: cint): PAVCodecParserContext;
cdecl; external av__codec;
{$IF LIBAVCODEC_MAX_VERSION_MAJOR < 53}
function av_parser_parse(s: PAVCodecParserContext;
avctx: PAVCodecContext;
poutbuf: PPointer;
poutbuf_size: PCint;
buf: {const} PByteArray;
buf_size: cint;
pts: cint64;
dts: cint64): cint;
cdecl; external av__codec; deprecated;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52021000} // 52.21.0
(**
* Parse a packet.
*
* @param s parser context.
* @param avctx codec context.
* @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
* @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
* @param buf input buffer.
* @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output).
* @param pts input presentation timestamp.
* @param dts input decoding timestamp.
* @param pos input byte position in stream.
* @return the number of bytes of the input bitstream used.
*
* Example:
* @code
* while (in_len) do
* begin
* len := av_parser_parse2(myparser, AVCodecContext, data, size,
* in_data, in_len,
* pts, dts, pos);
* in_data := in_data + len;
* in_len := in_len - len;
*
* if (size) then
* decode_frame(data, size);
* end;
* @endcode
*)
function av_parser_parse2(s: PAVCodecParserContext;
avctx: PAVCodecContext;
poutbuf: PPointer;
poutbuf_size: PCint;
buf: {const} PByteArray;
buf_size: cint;
pts: cint64;
dts: cint64;
pos: cint64): cint;
cdecl; external av__codec;
{$IFEND}
function av_parser_change(s: PAVCodecParserContext;
avctx: PAVCodecContext;
poutbuf: PPointer; poutbuf_size: PCint;
buf: {const} PByteArray; buf_size: cint; keyframe: cint): cint;
cdecl; external av__codec;
procedure av_parser_close(s: PAVCodecParserContext);
cdecl; external av__codec;
type
PAVBitStreamFilterContext = ^TAVBitStreamFilterContext;
PAVBitStreamFilter = ^TAVBitStreamFilter;
TAVBitStreamFilterContext = record
priv_data: pointer;
filter: PAVBitStreamFilter;
parser: PAVCodecParserContext;
next: PAVBitStreamFilterContext;
end;
TAVBitStreamFilter = record
name: PAnsiChar;
priv_data_size: cint;
filter: function(bsfc: PAVBitStreamFilterContext;
avctx: PAVCodecContext; args: PByteArray;
poutbuf: PPointer; poutbuf_size: PCint;
buf: PByte; buf_size: cint; keyframe: cint): cint; cdecl;
{$IF LIBAVCODEC_VERSION >= 51043000} // 51.43.0
close: procedure(bsfc: PAVBitStreamFilterContext);
{$IFEND}
next: PAVBitStreamFilter;
end;
procedure av_register_bitstream_filter(bsf: PAVBitStreamFilter);
cdecl; external av__codec;
function av_bitstream_filter_init(name: PAnsiChar): PAVBitStreamFilterContext;
cdecl; external av__codec;
function av_bitstream_filter_filter(bsfc: PAVBitStreamFilterContext;
avctx: PAVCodecContext; args: PByteArray;
poutbuf: PPointer; poutbuf_size: PCint;
buf: PByte; buf_size: cint; keyframe: cint): cint;
cdecl; external av__codec;
procedure av_bitstream_filter_close(bsf: PAVBitStreamFilterContext);
cdecl; external av__codec;
{$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 >= 52025000} // >= 52.25.0
(**
* Allocates a buffer, reusing the given one if large enough.
*
* Contrary to av_fast_realloc the current buffer contents might not be
* preserved and on error the old buffer is freed, thus no special
* handling to avoid memleaks is necessary.
*
* @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
* @param size size of the buffer *ptr points to
* @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
* *size 0 if an error occurred.
*)
procedure av_fast_malloc(ptr: pointer; size: PCuint; min_size: cuint);
cdecl; external av__codec;
{$IFEND}
{$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;
{$IF LIBAVCODEC_VERSION < 52022001} // 52.22.1
pix_fmt: cint;
{$ELSE}
pix_fmt: TAVPixelFormat;
{$IFEND}
width: cint;
height: cint);
cdecl; external av__codec;
(**
* Crop image top and left side.
*)
function av_picture_crop(dst: PAVPicture;
src: {const} PAVPicture;
{$IF LIBAVCODEC_VERSION < 52022001} // 52.22.1
pix_fmt: cint;
{$ELSE}
pix_fmt: TAVPixelFormat;
{$IFEND}
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;
{$IF LIBAVCODEC_VERSION < 52022001} // 52.22.1
pix_fmt: cint;
{$ELSE}
pix_fmt: TAVPixelFormat;
{$IFEND}
padtop: cint;
padbottom: cint;
padleft: cint;
padright:
cint;
color: PCint): cint;
cdecl; external av__codec;
{$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;
{$IF LIBAVCODEC_VERSION >= 51041000} // 51.41.0
(**
* Parses str and put in width_ptr and height_ptr the detected values.
*
* @return 0 in case of a successful parsing, a negative value otherwise
* @param[in] str the string to parse: it has to be a string in the format
* <width>x<height> or a valid video frame size abbreviation.
* @param[in,out] width_ptr pointer to the variable which will contain the detected
* frame width value
* @param[in,out] height_ptr pointer to the variable which will contain the detected
* frame height value
*)
function av_parse_video_frame_size(width_ptr: PCint; height_ptr: PCint; str: {const} PAnsiChar): cint;
cdecl; external av__codec;
(**
* Parses str and put in frame_rate the detected values.
*
* @return 0 in case of a successful parsing, a negative value otherwise
* @param[in] str the string to parse: it has to be a string in the format
* <frame_rate_num>/<frame_rate_den>, a float number or a valid video rate abbreviation
* @param[in,out] frame_rate pointer to the AVRational which will contain the detected
* frame rate
*)
function av_parse_video_frame_rate(frame_rate: PAVRational; str: {const} PAnsiChar): cint;
cdecl; external av__codec;
{$IFEND}
{* error handling *}
const
{$IFDEF UNIX}
ENOENT = ESysENOENT;
EIO = ESysEIO;
ENOMEM = ESysENOMEM;
EINVAL = ESysEINVAL;
EDOM = ESysEDOM;
ENOSYS = ESysENOSYS;
EILSEQ = ESysEILSEQ;
EPIPE = ESysEPIPE;
{$ELSE}
ENOENT = 2;
EIO = 5;
ENOMEM = 12;
EINVAL = 22;
EPIPE = 32; // just an assumption. needs to be checked.
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. *)
{$IF LIBAVCODEC_VERSION >= 52017000} // 52.17.0
AVERROR_EOF = AVERROR_SIGN * EPIPE; (**< End of file. *)
{$IFEND}
// 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));
{$IF LIBAVCODEC_VERSION >= 52032000} // >= 52.32.0
(**
* Logs a generic warning message about a missing feature. This function is
* intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
* only, and would normally not be used by applications.
* @param[in] avc a pointer to an arbitrary struct of which the first field is
* a pointer to an AVClass struct
* @param[in] feature string containing the name of the missing feature
* @param[in] want_sample indicates if samples are wanted which exhibit this feature.
* If want_sample is non-zero, additional verbage will be added to the log
* message which tells the user how to report samples to the development
* mailing list.
*)
procedure av_log_missing_feature(avc: Pointer; feature: {const} Pchar; want_sample: cint);
cdecl; external av__codec;
(**
* Logs a generic warning message asking for a sample. This function is
* intended to be used internally by FFmpeg (libavcodec, libavformat, etc.)
* only, and would normally not be used by applications.
* @param[in] avc a pointer to an arbitrary struct of which the first field is
* a pointer to an AVClass struct
* @param[in] msg string containing an optional message, or NULL if no message
*)
procedure av_log_ask_for_sample(avc: Pointer; msg: {const} Pchar);
cdecl; external av__codec;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52018000} // 52.18.0
(**
* Registers the hardware accelerator hwaccel.
*)
procedure av_register_hwaccel (hwaccel: PAVHWAccel)
cdecl; external av__codec;
(**
* If hwaccel is NULL, returns the first registered hardware accelerator,
* if hwaccel is non-NULL, returns the next registered hardware accelerator
* after hwaccel, or NULL if hwaccel is the last one.
*)
function av_hwaccel_next (hwaccel: PAVHWAccel): PAVHWAccel;
cdecl; external av__codec;
{$IFEND}
{$IF LIBAVCODEC_VERSION >= 52030000} // 52.30.0
(**
* Lock operation used by lockmgr
*)
type
TAVLockOp = (
AV_LOCK_CREATE, ///< Create a mutex
AV_LOCK_OBTAIN, ///< Lock the mutex
AV_LOCK_RELEASE, ///< Unlock the mutex
AV_LOCK_DESTROY ///< Free mutex resources
);
(**
* Register a user provided lock manager supporting the operations
* specified by AVLockOp. mutex points to a (void) where the
* lockmgr should store/get a pointer to a user allocated mutex. It's
* NULL upon AV_LOCK_CREATE and != NULL for all other ops.
*
* @param cb User defined callback. Note: FFmpeg may invoke calls to this
* callback during the call to av_lockmgr_register().
* Thus, the application must be prepared to handle that.
* If cb is set to NULL the lockmgr will be unregistered.
* Also note that during unregistration the previously registered
* lockmgr callback may also be invoked.
*)
// ToDo: Implement and test this
//function av_lockmgr_register(cb: function (mutex: pointer; op: TAVLockOp)): cint;
// cdecl; external av__codec;
{$IFEND}
implementation
{$IF (LIBAVCODEC_VERSION >= 52025000) and (LIBAVCODEC_VERSION <= 52027000)} // 52.25.0 - 52.27.0
procedure av_free_packet(pkt: PAVPacket);{$IFDEF HASINLINE} inline; {$ENDIF}
begin
if assigned(pkt) then
begin
if assigned(pkt^.destruct) then
pkt^.destruct(pkt);
pkt^.data := NIL;
pkt^.size := 0;
end;
end;
{$IFEND}
end.
