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* copyright (c) 2001 Fabrice Bellard
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* This file is part of FFmpeg.
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* external api header.
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#include <sys/types.h> /* size_t */
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#define AV_STRINGIFY(s) AV_TOSTRING(s)
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#define AV_TOSTRING(s) #s
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#define LIBAVCODEC_VERSION_INT ((51<<16)+(35<<8)+0)
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#define LIBAVCODEC_VERSION 51.35.0
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#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
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#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
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#define AV_NOPTS_VALUE INT64_C(0x8000000000000000)
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#define AV_TIME_BASE 1000000
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#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
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CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
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CODEC_ID_MPEG2VIDEO_XVMC,
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CODEC_ID_INTERPLAY_VIDEO,
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CODEC_ID_TRUEMOTION1,
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CODEC_ID_TRUEMOTION2,
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CODEC_ID_DSICINVIDEO,
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CODEC_ID_TIERTEXSEQVIDEO,
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/* various pcm "codecs" */
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CODEC_ID_PCM_S16LE= 0x10000,
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CODEC_ID_PCM_S24DAUD,
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/* various adpcm codecs */
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CODEC_ID_ADPCM_IMA_QT= 0x11000,
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CODEC_ID_ADPCM_IMA_WAV,
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CODEC_ID_ADPCM_IMA_DK3,
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CODEC_ID_ADPCM_IMA_DK4,
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CODEC_ID_ADPCM_IMA_WS,
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CODEC_ID_ADPCM_IMA_SMJPEG,
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CODEC_ID_ADPCM_YAMAHA,
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CODEC_ID_ADPCM_SBPRO_4,
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CODEC_ID_ADPCM_SBPRO_3,
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CODEC_ID_ADPCM_SBPRO_2,
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CODEC_ID_AMR_NB= 0x12000,
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/* RealAudio codecs*/
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CODEC_ID_RA_144= 0x13000,
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/* various DPCM codecs */
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CODEC_ID_ROQ_DPCM= 0x14000,
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CODEC_ID_INTERPLAY_DPCM,
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CODEC_ID_MP2= 0x15000,
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CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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CODEC_ID_WESTWOOD_SND1,
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CODEC_ID_GSM, /* As in Berlin toast format */
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CODEC_ID_DSICINAUDIO,
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CODEC_ID_GSM_MS, /* As found in WAV */
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/* subtitle codecs */
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CODEC_ID_DVD_SUBTITLE= 0x17000,
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CODEC_ID_DVB_SUBTITLE,
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CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
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stream (only used by libavformat) */
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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/* CODEC_ID_MP3LAME is absolete */
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#define CODEC_ID_MP3LAME CODEC_ID_MP3
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#define CODEC_ID_MPEG4AAC CODEC_ID_AAC
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CODEC_TYPE_UNKNOWN = -1,
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/* currently unused, may be used if 24/32 bits samples ever supported */
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/* all in native endian */
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SAMPLE_FMT_NONE = -1,
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SAMPLE_FMT_U8, ///< unsigned 8 bits
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SAMPLE_FMT_S16, ///< signed 16 bits
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SAMPLE_FMT_S24, ///< signed 24 bits
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SAMPLE_FMT_S32, ///< signed 32 bits
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SAMPLE_FMT_FLT, ///< float
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#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
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* Required number of additionally allocated bytes at the end of the input bitstream for decoding.
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* this is mainly needed because some optimized bitstream readers read
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* 32 or 64 bit at once and could read over the end<br>
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* Note, if the first 23 bits of the additional bytes are not 0 then damaged
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* MPEG bitstreams could cause overread and segfault
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#define FF_INPUT_BUFFER_PADDING_SIZE 8
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* minimum encoding buffer size.
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* used to avoid some checks during header writing
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#define FF_MIN_BUFFER_SIZE 16384
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/* motion estimation type, EPZS by default */
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//we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
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AVDISCARD_NONE =-16, ///< discard nothing
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AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
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AVDISCARD_NONREF = 8, ///< discard all non reference
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AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
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AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
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AVDISCARD_ALL = 48, ///< discard all
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typedef struct RcOverride{
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int qscale; // if this is 0 then quality_factor will be used instead
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float quality_factor;
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#define FF_MAX_B_FRAMES 16
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these flags can be passed in AVCodecContext.flags before initing
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Note: not everything is supported yet.
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#define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
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#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
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#define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
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#define CODEC_FLAG_GMC 0x0020 ///< use GMC
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#define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
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#define CODEC_FLAG_PART 0x0080 ///< use data partitioning
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/* parent program guarantees that the input for b-frame containing streams is not written to
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for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
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#define CODEC_FLAG_INPUT_PRESERVED 0x0100
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#define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
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#define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
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#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
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#define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
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#define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
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#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
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#define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
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of only at frame boundaries */
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#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
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#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
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#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
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#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
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#define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
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#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
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#define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
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/* Fx : Flag for h263+ extra options */
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#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
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#define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
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#define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
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#define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
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#define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
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#define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
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#define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
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#define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
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#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
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#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
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#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
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#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
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#define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
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#define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
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#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
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#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
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#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
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#define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
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#define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
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#define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
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#define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
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#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
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#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
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#define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
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#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
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#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
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#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format
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#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skiping
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/* Unsupported options :
389
* Syntax Arithmetic coding (SAC)
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* Reference Picture Selection
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* Independent Segment Decoding */
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/* codec capabilities */
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#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
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* Codec uses get_buffer() for allocating buffers.
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* direct rendering method 1
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#define CODEC_CAP_DR1 0x0002
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/* if 'parse_only' field is true, then avcodec_parse_frame() can be
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#define CODEC_CAP_PARSE_ONLY 0x0004
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#define CODEC_CAP_TRUNCATED 0x0008
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/* codec can export data for HW decoding (XvMC) */
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#define CODEC_CAP_HWACCEL 0x0010
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* codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
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* if this is not set, the codec is guaranteed to never be feeded with NULL data
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#define CODEC_CAP_DELAY 0x0020
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* Codec can be fed a final frame with a smaller size.
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* This can be used to prevent truncation of the last audio samples.
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#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
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//the following defines may change, don't expect compatibility if you use them
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#define MB_TYPE_INTRA4x4 0x0001
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#define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
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#define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
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#define MB_TYPE_16x16 0x0008
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#define MB_TYPE_16x8 0x0010
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#define MB_TYPE_8x16 0x0020
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#define MB_TYPE_8x8 0x0040
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#define MB_TYPE_INTERLACED 0x0080
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#define MB_TYPE_DIRECT2 0x0100 //FIXME
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#define MB_TYPE_ACPRED 0x0200
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#define MB_TYPE_GMC 0x0400
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#define MB_TYPE_SKIP 0x0800
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#define MB_TYPE_P0L0 0x1000
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#define MB_TYPE_P1L0 0x2000
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#define MB_TYPE_P0L1 0x4000
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#define MB_TYPE_P1L1 0x8000
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#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
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#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
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#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
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#define MB_TYPE_QUANT 0x00010000
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#define MB_TYPE_CBP 0x00020000
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//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
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* this specifies the area which should be displayed. Note there may be multiple such areas for one frame
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typedef struct AVPanScan{
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* - encoding: set by user.
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* - decoding: set by lavc
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* width and height in 1/16 pel
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* - encoding: set by user.
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* - decoding: set by lavc
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* position of the top left corner in 1/16 pel for up to 3 fields/frames.
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* - encoding: set by user.
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* - decoding: set by lavc
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int16_t position[3][2];
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#define FF_COMMON_FRAME \
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* pointer to the picture planes.\
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* this might be different from the first allocated byte\
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* pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
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* this isn't used by lavc unless the default get/release_buffer() is used\
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* 1 -> keyframe, 0-> not\
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* - encoding: set by lavc\
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* - decoding: set by lavc\
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* picture type of the frame, see ?_TYPE below.\
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* - encoding: set by lavc for coded_picture (and set by user for input)\
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* - decoding: set by lavc\
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* presentation timestamp in time_base units (time when frame should be shown to user)\
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* if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
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* - encoding: MUST be set by user\
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* - decoding: set by lavc\
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* picture number in bitstream order.\
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* - encoding: set by\
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* - decoding: set by lavc\
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int coded_picture_number;\
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* picture number in display order.\
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* - encoding: set by\
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* - decoding: set by lavc\
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int display_picture_number;\
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* quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
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* - encoding: set by lavc for coded_picture (and set by user for input)\
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* - decoding: set by lavc\
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* buffer age (1->was last buffer and dint change, 2->..., ...).\
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* set to INT_MAX if the buffer has not been used yet \
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* - encoding: unused\
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* - decoding: MUST be set by get_buffer()\
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* is this picture used as reference\
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* - encoding: unused\
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* - decoding: set by lavc (before get_buffer() call))\
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* - encoding: unused\
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* - decoding: set by lavc\
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int8_t *qscale_table;\
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* - encoding: unused\
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* - decoding: set by lavc\
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* mbskip_table[mb]>=1 if MB didnt change\
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* stride= mb_width = (width+15)>>4\
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* - encoding: unused\
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* - decoding: set by lavc\
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uint8_t *mbskip_table;\
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* Motion vector table.\
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* int mv_sample_log2= 4 - motion_subsample_log2;\
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* int mb_width= (width+15)>>4;\
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* int mv_stride= (mb_width << mv_sample_log2) + 1;\
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* motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
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* - encoding: set by user\
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* - decoding: set by lavc\
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int16_t (*motion_val[2])[2];\
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* Macroblock type table\
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* mb_type_base + mb_width + 2\
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* - encoding: set by user\
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* - decoding: set by lavc\
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* log2 of the size of the block which a single vector in motion_val represents: \
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* (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
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* - encoding: unused\
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* - decoding: set by lavc\
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uint8_t motion_subsample_log2;\
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* for some private data of the user\
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* - encoding: unused\
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* - decoding: set by user\
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* - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
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* - decoding: unused\
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* type of the buffer (to keep track of who has to dealloc data[*])\
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* - encoding: set by the one who allocs it\
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* - decoding: set by the one who allocs it\
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* Note: user allocated (direct rendering) & internal buffers can not coexist currently\
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* when decoding, this signal how much the picture must be delayed.\
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* extra_delay = repeat_pict / (2*fps)\
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* - encoding: unused\
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* - decoding: set by lavc\
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* The content of the picture is interlaced.\
631
* - encoding: set by user\
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* - decoding: set by lavc (default 0)\
634
int interlaced_frame;\
637
* if the content is interlaced, is top field displayed first.\
638
* - encoding: set by user\
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* - decoding: set by lavc\
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int top_field_first;\
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* - encoding: set by user\
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* - decoding: set by lavc\
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AVPanScan *pan_scan;\
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* tell user application that palette has changed from previous frame.\
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* - encoding: ??? (no palette-enabled encoder yet)\
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* - decoding: set by lavc (default 0)\
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int palette_has_changed;\
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* Codec suggestion on buffer type if != 0\
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* - encoding: unused\
660
* - decoding: set by lavc (before get_buffer() call))\
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* - encoding: unused\
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* - decoding: set by lavc\
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* Motion referece frame index\
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* - encoding: set by user\
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* - decoding: set by lavc\
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int8_t *ref_index[2];
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#define FF_QSCALE_TYPE_MPEG1 0
679
#define FF_QSCALE_TYPE_MPEG2 1
680
#define FF_QSCALE_TYPE_H264 2
682
#define FF_BUFFER_TYPE_INTERNAL 1
683
#define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
684
#define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
685
#define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
688
#define FF_I_TYPE 1 // Intra
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#define FF_P_TYPE 2 // Predicted
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#define FF_B_TYPE 3 // Bi-dir predicted
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#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
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#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
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#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
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#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
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#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
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typedef struct AVFrame {
707
#define DEFAULT_FRAME_RATE_BASE 1001000
710
* main external api structure.
712
typedef struct AVCodecContext {
714
* Info on struct for av_log
715
* - set by avcodec_alloc_context
719
* the average bitrate.
720
* - encoding: set by user. unused for constant quantizer encoding
721
* - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
726
* number of bits the bitstream is allowed to diverge from the reference.
727
* the reference can be CBR (for CBR pass1) or VBR (for pass2)
728
* - encoding: set by user. unused for constant quantizer encoding
731
int bit_rate_tolerance;
735
* - encoding: set by user.
736
* - decoding: set by user.
741
* some codecs needs additionnal format info. It is stored here
742
* - encoding: set by user.
743
* - decoding: set by lavc. (FIXME is this ok?)
748
* motion estimation algorithm used for video coding.
749
* 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
750
* 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
751
* - encoding: MUST be set by user.
757
* some codecs need / can use extra-data like huffman tables.
758
* mjpeg: huffman tables
759
* rv10: additional flags
760
* mpeg4: global headers (they can be in the bitstream or here)
761
* the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
762
* then extradata_size to avoid prolems if its read with the bitstream reader
763
* the bytewise contents of extradata must not depend on the architecture or cpu endianness
764
* - encoding: set/allocated/freed by lavc.
765
* - decoding: set/allocated/freed by user.
771
* this is the fundamental unit of time (in seconds) in terms
772
* of which frame timestamps are represented. for fixed-fps content,
773
* timebase should be 1/framerate and timestamp increments should be
775
* - encoding: MUST be set by user
776
* - decoding: set by lavc.
778
AVRational time_base;
782
* picture width / height.
783
* - encoding: MUST be set by user.
784
* - decoding: set by lavc.
785
* Note, for compatibility its possible to set this instead of
786
* coded_width/height before decoding
790
#define FF_ASPECT_EXTENDED 15
793
* the number of pictures in a group of pitures, or 0 for intra_only.
794
* - encoding: set by user.
800
* pixel format, see PIX_FMT_xxx.
801
* - encoding: set by user.
802
* - decoding: set by lavc.
804
enum PixelFormat pix_fmt;
807
* Frame rate emulation. If not zero lower layer (i.e. format handler)
808
* has to read frames at native frame rate.
809
* - encoding: set by user.
810
* - decoding: unused.
815
* if non NULL, 'draw_horiz_band' is called by the libavcodec
816
* decoder to draw an horizontal band. It improve cache usage. Not
817
* all codecs can do that. You must check the codec capabilities
820
* - decoding: set by user.
821
* @param height the height of the slice
822
* @param y the y position of the slice
823
* @param type 1->top field, 2->bottom field, 3->frame
824
* @param offset offset into the AVFrame.data from which the slice should be read
826
void (*draw_horiz_band)(struct AVCodecContext *s,
827
const AVFrame *src, int offset[4],
828
int y, int type, int height);
831
int sample_rate; ///< samples per sec
835
* audio sample format.
836
* - encoding: set by user.
837
* - decoding: set by lavc.
839
enum SampleFormat sample_fmt; ///< sample format, currenly unused
841
/* the following data should not be initialized */
843
* samples per packet. initialized when calling 'init'
846
int frame_number; ///< audio or video frame number
847
int real_pict_num; ///< returns the real picture number of previous encoded frame
850
* number of frames the decoded output will be delayed relative to
852
* - encoding: set by lavc.
857
/* - encoding parameters */
858
float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
859
float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
863
* - encoding: set by user.
870
* - encoding: set by user.
876
* maximum quantizer difference between frames.
877
* - encoding: set by user.
883
* maximum number of b frames between non b frames.
884
* note: the output will be delayed by max_b_frames+1 relative to the input
885
* - encoding: set by user.
891
* qscale factor between ip and b frames.
892
* - encoding: set by user.
895
float b_quant_factor;
897
/** obsolete FIXME remove */
899
#define FF_RC_STRATEGY_XVID 1
901
int b_frame_strategy;
906
* - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
907
* @deprecated Deprecated in favor of skip_idct and skip_frame.
911
struct AVCodec *codec;
915
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
916
/* unused, FIXME remove*/
920
int rtp_payload_size; /* The size of the RTP payload: the coder will */
921
/* do it's best to deliver a chunk with size */
922
/* below rtp_payload_size, the chunk will start */
923
/* with a start code on some codecs like H.263 */
924
/* This doesn't take account of any particular */
925
/* headers inside the transmited RTP payload */
928
/* The RTP callback: This function is called */
929
/* every time the encoder has a packet to send */
930
/* Depends on the encoder if the data starts */
931
/* with a Start Code (it should) H.263 does. */
932
/* mb_nb contains the number of macroblocks */
933
/* encoded in the RTP payload */
934
void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
936
/* statistics, used for 2-pass encoding */
947
* number of bits used for the previously encoded frame.
948
* - encoding: set by lavc
954
* private data of the user, can be used to carry app specific stuff.
955
* - encoding: set by user
956
* - decoding: set by user
961
enum CodecType codec_type; /* see CODEC_TYPE_xxx */
962
enum CodecID codec_id; /* see CODEC_ID_xxx */
965
* fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
966
* this is used to workaround some encoder bugs
967
* - encoding: set by user, if not then the default based on codec_id will be used
968
* - decoding: set by user, will be converted to upper case by lavc during init
970
unsigned int codec_tag;
973
* workaround bugs in encoders which sometimes cannot be detected automatically.
974
* - encoding: set by user
975
* - decoding: set by user
978
#define FF_BUG_AUTODETECT 1 ///< autodetection
979
#define FF_BUG_OLD_MSMPEG4 2
980
#define FF_BUG_XVID_ILACE 4
981
#define FF_BUG_UMP4 8
982
#define FF_BUG_NO_PADDING 16
983
#define FF_BUG_AMV 32
984
#define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
985
#define FF_BUG_QPEL_CHROMA 64
986
#define FF_BUG_STD_QPEL 128
987
#define FF_BUG_QPEL_CHROMA2 256
988
#define FF_BUG_DIRECT_BLOCKSIZE 512
989
#define FF_BUG_EDGE 1024
990
#define FF_BUG_HPEL_CHROMA 2048
991
#define FF_BUG_DC_CLIP 4096
992
#define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
993
//#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
996
* luma single coeff elimination threshold.
997
* - encoding: set by user
1000
int luma_elim_threshold;
1003
* chroma single coeff elimination threshold.
1004
* - encoding: set by user
1005
* - decoding: unused
1007
int chroma_elim_threshold;
1010
* strictly follow the std (MPEG4, ...).
1011
* - encoding: set by user
1012
* - decoding: unused
1014
int strict_std_compliance;
1015
#define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
1016
#define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
1017
#define FF_COMPLIANCE_NORMAL 0
1018
#define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
1019
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
1022
* qscale offset between ip and b frames.
1023
* if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1024
* if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1025
* - encoding: set by user.
1026
* - decoding: unused
1028
float b_quant_offset;
1031
* error resilience higher values will detect more errors but may missdetect
1032
* some more or less valid parts as errors.
1033
* - encoding: unused
1034
* - decoding: set by user
1036
int error_resilience;
1037
#define FF_ER_CAREFUL 1
1038
#define FF_ER_COMPLIANT 2
1039
#define FF_ER_AGGRESSIVE 3
1040
#define FF_ER_VERY_AGGRESSIVE 4
1043
* called at the beginning of each frame to get a buffer for it.
1044
* if pic.reference is set then the frame will be read later by lavc
1045
* avcodec_align_dimensions() should be used to find the required width and
1046
* height, as they normally need to be rounded up to the next multiple of 16
1047
* - encoding: unused
1048
* - decoding: set by lavc, user can override
1050
int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1053
* called to release buffers which where allocated with get_buffer.
1054
* a released buffer can be reused in get_buffer()
1055
* pic.data[*] must be set to NULL
1056
* - encoding: unused
1057
* - decoding: set by lavc, user can override
1059
void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1062
* if 1 the stream has a 1 frame delay during decoding.
1063
* - encoding: set by lavc
1064
* - decoding: set by lavc
1069
* number of bytes per packet if constant and known or 0
1070
* used by some WAV based audio codecs
1074
int parse_only; /* - decoding only: if true, only parsing is done
1075
(function avcodec_parse_frame()). The frame
1076
data is returned. Only MPEG codecs support this now. */
1079
* 0-> h263 quant 1-> mpeg quant.
1080
* - encoding: set by user.
1081
* - decoding: unused
1086
* pass1 encoding statistics output buffer.
1087
* - encoding: set by lavc
1088
* - decoding: unused
1093
* pass2 encoding statistics input buffer.
1094
* concatenated stuff from stats_out of pass1 should be placed here
1095
* - encoding: allocated/set/freed by user
1096
* - decoding: unused
1101
* ratecontrol qmin qmax limiting method.
1102
* 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1103
* - encoding: set by user.
1104
* - decoding: unused
1112
* ratecontrol override, see RcOverride.
1113
* - encoding: allocated/set/freed by user.
1114
* - decoding: unused
1116
RcOverride *rc_override;
1117
int rc_override_count;
1120
* rate control equation.
1121
* - encoding: set by user
1122
* - decoding: unused
1128
* - encoding: set by user.
1129
* - decoding: unused
1135
* - encoding: set by user.
1136
* - decoding: unused
1141
* decoder bitstream buffer size.
1142
* - encoding: set by user.
1143
* - decoding: unused
1146
float rc_buffer_aggressivity;
1149
* qscale factor between p and i frames.
1150
* if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1151
* if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1152
* - encoding: set by user.
1153
* - decoding: unused
1155
float i_quant_factor;
1158
* qscale offset between p and i frames.
1159
* - encoding: set by user.
1160
* - decoding: unused
1162
float i_quant_offset;
1165
* initial complexity for pass1 ratecontrol.
1166
* - encoding: set by user.
1167
* - decoding: unused
1169
float rc_initial_cplx;
1172
* dct algorithm, see FF_DCT_* below.
1173
* - encoding: set by user
1174
* - decoding: unused
1177
#define FF_DCT_AUTO 0
1178
#define FF_DCT_FASTINT 1
1179
#define FF_DCT_INT 2
1180
#define FF_DCT_MMX 3
1181
#define FF_DCT_MLIB 4
1182
#define FF_DCT_ALTIVEC 5
1183
#define FF_DCT_FAAN 6
1186
* luminance masking (0-> disabled).
1187
* - encoding: set by user
1188
* - decoding: unused
1193
* temporary complexity masking (0-> disabled).
1194
* - encoding: set by user
1195
* - decoding: unused
1197
float temporal_cplx_masking;
1200
* spatial complexity masking (0-> disabled).
1201
* - encoding: set by user
1202
* - decoding: unused
1204
float spatial_cplx_masking;
1207
* p block masking (0-> disabled).
1208
* - encoding: set by user
1209
* - decoding: unused
1214
* darkness masking (0-> disabled).
1215
* - encoding: set by user
1216
* - decoding: unused
1221
/* for binary compatibility */
1225
* idct algorithm, see FF_IDCT_* below.
1226
* - encoding: set by user
1227
* - decoding: set by user
1230
#define FF_IDCT_AUTO 0
1231
#define FF_IDCT_INT 1
1232
#define FF_IDCT_SIMPLE 2
1233
#define FF_IDCT_SIMPLEMMX 3
1234
#define FF_IDCT_LIBMPEG2MMX 4
1235
#define FF_IDCT_PS2 5
1236
#define FF_IDCT_MLIB 6
1237
#define FF_IDCT_ARM 7
1238
#define FF_IDCT_ALTIVEC 8
1239
#define FF_IDCT_SH4 9
1240
#define FF_IDCT_SIMPLEARM 10
1241
#define FF_IDCT_H264 11
1242
#define FF_IDCT_VP3 12
1243
#define FF_IDCT_IPP 13
1244
#define FF_IDCT_XVIDMMX 14
1245
#define FF_IDCT_CAVS 15
1246
#define FF_IDCT_SIMPLEARMV5TE 16
1247
#define FF_IDCT_SIMPLEARMV6 17
1251
* - encoding: set by lavc
1252
* - decoding: set by user (or 0)
1256
* slice offsets in the frame in bytes.
1257
* - encoding: set/allocated by lavc
1258
* - decoding: set/allocated by user (or NULL)
1263
* error concealment flags.
1264
* - encoding: unused
1265
* - decoding: set by user
1267
int error_concealment;
1268
#define FF_EC_GUESS_MVS 1
1269
#define FF_EC_DEBLOCK 2
1272
* dsp_mask could be add used to disable unwanted CPU features
1273
* CPU features (i.e. MMX, SSE. ...)
1275
* with FORCE flag you may instead enable given CPU features
1276
* (Dangerous: usable in case of misdetection, improper usage however will
1277
* result into program crash)
1280
#define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1281
/* lower 16 bits - CPU features */
1283
#define FF_MM_MMX 0x0001 /* standard MMX */
1284
#define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1285
#define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1286
#define FF_MM_SSE 0x0008 /* SSE functions */
1287
#define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1288
#define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1289
#endif /* HAVE_MMX */
1291
#define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1292
#endif /* HAVE_IWMMXT */
1295
* bits per sample/pixel from the demuxer (needed for huffyuv).
1296
* - encoding: set by lavc
1297
* - decoding: set by user
1299
int bits_per_sample;
1302
* prediction method (needed for huffyuv).
1303
* - encoding: set by user
1304
* - decoding: unused
1306
int prediction_method;
1307
#define FF_PRED_LEFT 0
1308
#define FF_PRED_PLANE 1
1309
#define FF_PRED_MEDIAN 2
1312
* sample aspect ratio (0 if unknown).
1313
* numerator and denominator must be relative prime and smaller then 256 for some video standards
1314
* - encoding: set by user.
1315
* - decoding: set by lavc.
1317
AVRational sample_aspect_ratio;
1320
* the picture in the bitstream.
1321
* - encoding: set by lavc
1322
* - decoding: set by lavc
1324
AVFrame *coded_frame;
1328
* - encoding: set by user.
1329
* - decoding: set by user.
1332
#define FF_DEBUG_PICT_INFO 1
1333
#define FF_DEBUG_RC 2
1334
#define FF_DEBUG_BITSTREAM 4
1335
#define FF_DEBUG_MB_TYPE 8
1336
#define FF_DEBUG_QP 16
1337
#define FF_DEBUG_MV 32
1338
#define FF_DEBUG_DCT_COEFF 0x00000040
1339
#define FF_DEBUG_SKIP 0x00000080
1340
#define FF_DEBUG_STARTCODE 0x00000100
1341
#define FF_DEBUG_PTS 0x00000200
1342
#define FF_DEBUG_ER 0x00000400
1343
#define FF_DEBUG_MMCO 0x00000800
1344
#define FF_DEBUG_BUGS 0x00001000
1345
#define FF_DEBUG_VIS_QP 0x00002000
1346
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
1350
* - encoding: set by user.
1351
* - decoding: set by user.
1354
#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1355
#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1356
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1360
* - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1361
* - decoding: unused
1366
* minimum MB quantizer.
1367
* - encoding: unused
1368
* - decoding: unused
1373
* maximum MB quantizer.
1374
* - encoding: unused
1375
* - decoding: unused
1380
* motion estimation compare function.
1381
* - encoding: set by user.
1382
* - decoding: unused
1386
* subpixel motion estimation compare function.
1387
* - encoding: set by user.
1388
* - decoding: unused
1392
* macroblock compare function (not supported yet).
1393
* - encoding: set by user.
1394
* - decoding: unused
1398
* interlaced dct compare function
1399
* - encoding: set by user.
1400
* - decoding: unused
1403
#define FF_CMP_SAD 0
1404
#define FF_CMP_SSE 1
1405
#define FF_CMP_SATD 2
1406
#define FF_CMP_DCT 3
1407
#define FF_CMP_PSNR 4
1408
#define FF_CMP_BIT 5
1410
#define FF_CMP_ZERO 7
1411
#define FF_CMP_VSAD 8
1412
#define FF_CMP_VSSE 9
1413
#define FF_CMP_NSSE 10
1414
#define FF_CMP_W53 11
1415
#define FF_CMP_W97 12
1416
#define FF_CMP_DCTMAX 13
1417
#define FF_CMP_DCT264 14
1418
#define FF_CMP_CHROMA 256
1421
* ME diamond size & shape.
1422
* - encoding: set by user.
1423
* - decoding: unused
1428
* amount of previous MV predictors (2a+1 x 2a+1 square).
1429
* - encoding: set by user.
1430
* - decoding: unused
1432
int last_predictor_count;
1435
* pre pass for motion estimation.
1436
* - encoding: set by user.
1437
* - decoding: unused
1442
* motion estimation pre pass compare function.
1443
* - encoding: set by user.
1444
* - decoding: unused
1449
* ME pre pass diamond size & shape.
1450
* - encoding: set by user.
1451
* - decoding: unused
1456
* subpel ME quality.
1457
* - encoding: set by user.
1458
* - decoding: unused
1460
int me_subpel_quality;
1463
* callback to negotiate the pixelFormat.
1464
* @param fmt is the list of formats which are supported by the codec,
1465
* its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1466
* the first is allways the native one
1467
* @return the choosen format
1468
* - encoding: unused
1469
* - decoding: set by user, if not set then the native format will always be choosen
1471
enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1474
* DTG active format information (additionnal aspect ratio
1475
* information only used in DVB MPEG2 transport streams). 0 if
1478
* - encoding: unused.
1479
* - decoding: set by decoder
1481
int dtg_active_format;
1482
#define FF_DTG_AFD_SAME 8
1483
#define FF_DTG_AFD_4_3 9
1484
#define FF_DTG_AFD_16_9 10
1485
#define FF_DTG_AFD_14_9 11
1486
#define FF_DTG_AFD_4_3_SP_14_9 13
1487
#define FF_DTG_AFD_16_9_SP_14_9 14
1488
#define FF_DTG_AFD_SP_4_3 15
1491
* Maximum motion estimation search range in subpel units.
1492
* if 0 then no limit
1494
* - encoding: set by user.
1495
* - decoding: unused.
1500
* intra quantizer bias.
1501
* - encoding: set by user.
1502
* - decoding: unused
1504
int intra_quant_bias;
1505
#define FF_DEFAULT_QUANT_BIAS 999999
1508
* inter quantizer bias.
1509
* - encoding: set by user.
1510
* - decoding: unused
1512
int inter_quant_bias;
1516
* - encoding: unused.
1517
* - decoding: which clrtable should be used for 8bit RGB images
1518
* table have to be stored somewhere FIXME
1523
* internal_buffer count.
1524
* Don't touch, used by lavc default_get_buffer()
1526
int internal_buffer_count;
1530
* Don't touch, used by lavc default_get_buffer()
1532
void *internal_buffer;
1534
#define FF_LAMBDA_SHIFT 7
1535
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1536
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1537
#define FF_LAMBDA_MAX (256*128-1)
1539
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1541
* global quality for codecs which cannot change it per frame.
1542
* this should be proportional to MPEG1/2/4 qscale.
1543
* - encoding: set by user.
1544
* - decoding: unused
1548
#define FF_CODER_TYPE_VLC 0
1549
#define FF_CODER_TYPE_AC 1
1552
* - encoding: set by user.
1553
* - decoding: unused
1559
* - encoding: set by user.
1560
* - decoding: unused
1566
* - encoding: unused
1567
* - decoding: set by user.
1569
uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1574
* - encoding: unused
1575
* - decoding: set by user.
1578
#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1579
#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1580
#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1583
* XVideo Motion Acceleration
1584
* - encoding: forbidden
1585
* - decoding: set by decoder
1587
int xvmc_acceleration;
1590
* macroblock decision mode
1591
* - encoding: set by user.
1592
* - decoding: unused
1595
#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1596
#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1597
#define FF_MB_DECISION_RD 2 ///< rate distoration
1600
* custom intra quantization matrix
1601
* - encoding: set by user, can be NULL
1602
* - decoding: set by lavc
1604
uint16_t *intra_matrix;
1607
* custom inter quantization matrix
1608
* - encoding: set by user, can be NULL
1609
* - decoding: set by lavc
1611
uint16_t *inter_matrix;
1614
* fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1615
* this is used to workaround some encoder bugs
1616
* - encoding: unused
1617
* - decoding: set by user, will be converted to upper case by lavc during init
1619
unsigned int stream_codec_tag;
1622
* scene change detection threshold.
1623
* 0 is default, larger means fewer detected scene changes
1624
* - encoding: set by user.
1625
* - decoding: unused
1627
int scenechange_threshold;
1630
* minimum lagrange multipler
1631
* - encoding: set by user.
1632
* - decoding: unused
1637
* maximum lagrange multipler
1638
* - encoding: set by user.
1639
* - decoding: unused
1644
* Palette control structure
1645
* - encoding: ??? (no palette-enabled encoder yet)
1646
* - decoding: set by user.
1648
struct AVPaletteControl *palctrl;
1651
* noise reduction strength
1652
* - encoding: set by user.
1653
* - decoding: unused
1655
int noise_reduction;
1658
* called at the beginning of a frame to get cr buffer for it.
1659
* buffer type (size, hints) must be the same. lavc won't check it.
1660
* lavc will pass previous buffer in pic, function should return
1661
* same buffer or new buffer with old frame "painted" into it.
1662
* if pic.data[0] == NULL must behave like get_buffer().
1663
* - encoding: unused
1664
* - decoding: set by lavc, user can override
1666
int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1669
* number of bits which should be loaded into the rc buffer before decoding starts
1670
* - encoding: set by user.
1671
* - decoding: unused
1673
int rc_initial_buffer_occupancy;
1677
* - encoding: set by user.
1678
* - decoding: unused
1680
int inter_threshold;
1684
* - encoding: set by user.
1685
* - decoding: set by user.
1690
* simulates errors in the bitstream to test error concealment.
1691
* - encoding: set by user.
1692
* - decoding: unused.
1697
* MP3 antialias algorithm, see FF_AA_* below.
1698
* - encoding: unused
1699
* - decoding: set by user
1702
#define FF_AA_AUTO 0
1703
#define FF_AA_FASTINT 1 //not implemented yet
1705
#define FF_AA_FLOAT 3
1707
* Quantizer noise shaping.
1708
* - encoding: set by user
1709
* - decoding: unused
1711
int quantizer_noise_shaping;
1715
* is used to decide how many independent tasks should be passed to execute()
1716
* - encoding: set by user
1717
* - decoding: set by user
1722
* the codec may call this to execute several independent things. it will return only after
1723
* finishing all tasks, the user may replace this with some multithreaded implementation, the
1724
* default implementation will execute the parts serially
1725
* @param count the number of things to execute
1726
* - encoding: set by lavc, user can override
1727
* - decoding: set by lavc, user can override
1729
int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1733
* can be used by execute() to store some per AVCodecContext stuff.
1734
* - encoding: set by execute()
1735
* - decoding: set by execute()
1737
void *thread_opaque;
1740
* Motion estimation threshold. under which no motion estimation is
1741
* performed, but instead the user specified motion vectors are used
1743
* - encoding: set by user
1744
* - decoding: unused
1749
* Macroblock threshold. under which the user specified macroblock types will be used
1750
* - encoding: set by user
1751
* - decoding: unused
1756
* precision of the intra dc coefficient - 8.
1757
* - encoding: set by user
1758
* - decoding: unused
1760
int intra_dc_precision;
1763
* noise vs. sse weight for the nsse comparsion function.
1764
* - encoding: set by user
1765
* - decoding: unused
1770
* number of macroblock rows at the top which are skipped.
1771
* - encoding: unused
1772
* - decoding: set by user
1777
* number of macroblock rows at the bottom which are skipped.
1778
* - encoding: unused
1779
* - decoding: set by user
1785
* - encoding: set by user
1786
* - decoding: set by lavc
1789
#define FF_PROFILE_UNKNOWN -99
1793
* - encoding: set by user
1794
* - decoding: set by lavc
1797
#define FF_LEVEL_UNKNOWN -99
1800
* low resolution decoding. 1-> 1/2 size, 2->1/4 size
1801
* - encoding: unused
1802
* - decoding: set by user
1807
* bitsream width / height. may be different from width/height if lowres
1808
* or other things are used
1809
* - encoding: unused
1810
* - decoding: set by user before init if known, codec should override / dynamically change if needed
1812
int coded_width, coded_height;
1815
* frame skip threshold
1816
* - encoding: set by user
1817
* - decoding: unused
1819
int frame_skip_threshold;
1823
* - encoding: set by user
1824
* - decoding: unused
1826
int frame_skip_factor;
1829
* frame skip exponent
1830
* - encoding: set by user
1831
* - decoding: unused
1836
* frame skip comparission function
1837
* - encoding: set by user.
1838
* - decoding: unused
1843
* border processing masking. raises the quantizer for mbs on the borders
1845
* - encoding: set by user
1846
* - decoding: unused
1848
float border_masking;
1851
* minimum MB lagrange multipler.
1852
* - encoding: set by user.
1853
* - decoding: unused
1858
* maximum MB lagrange multipler.
1859
* - encoding: set by user.
1860
* - decoding: unused
1866
* - encoding: set by user.
1867
* - decoding: unused
1869
int me_penalty_compensation;
1873
* - encoding: unused
1874
* - decoding: set by user.
1876
enum AVDiscard skip_loop_filter;
1880
* - encoding: unused
1881
* - decoding: set by user.
1883
enum AVDiscard skip_idct;
1887
* - encoding: unused
1888
* - decoding: set by user.
1890
enum AVDiscard skip_frame;
1894
* - encoding: set by user.
1895
* - decoding: unused
1901
* - encoding: set by user.
1902
* - decoding: unused
1907
* constant rate factor - quality-based VBR - values ~correspond to qps
1908
* - encoding: set by user.
1909
* - decoding: unused
1914
* constant quantization parameter rate control method
1915
* - encoding: set by user.
1916
* - decoding: unused
1922
* - encoding: set by user.
1923
* - decoding: unused
1928
* number of reference frames
1929
* - encoding: set by user.
1930
* - decoding: unused
1935
* chroma qp offset from luma
1936
* - encoding: set by user.
1937
* - decoding: unused
1942
* influences how often b-frames are used
1943
* - encoding: set by user.
1944
* - decoding: unused
1949
* trellis RD quantization
1950
* - encoding: set by user.
1951
* - decoding: unused
1956
* reduce fluctuations in qp (before curve compression)
1957
* - encoding: set by user.
1958
* - decoding: unused
1960
float complexityblur;
1963
* in-loop deblocking filter alphac0 parameter
1964
* alpha is in the range -6...6
1965
* - encoding: set by user.
1966
* - decoding: unused
1971
* in-loop deblocking filter beta parameter
1972
* beta is in the range -6...6
1973
* - encoding: set by user.
1974
* - decoding: unused
1979
* macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1980
* - encoding: set by user.
1981
* - decoding: unused
1984
#define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1985
#define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1986
#define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1987
#define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1988
#define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1991
* direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1992
* - encoding: set by user.
1993
* - decoding: unused
1998
* audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1999
* - encoding: set by user.
2000
* - decoding: unused
2005
* multiplied by qscale for each frame and added to scene_change_score
2006
* - encoding: set by user.
2007
* - decoding: unused
2009
int scenechange_factor;
2013
* note: value depends upon the compare functin used for fullpel ME
2014
* - encoding: set by user.
2015
* - decoding: unused
2020
* adjusts sensitivity of b_frame_strategy 1
2021
* - encoding: set by user.
2022
* - decoding: unused
2027
* - encoding: set by user.
2028
* - decoding: unused
2030
int compression_level;
2031
#define FF_COMPRESSION_DEFAULT -1
2034
* sets whether to use LPC mode - used by FLAC encoder
2035
* - encoding: set by user.
2036
* - decoding: unused.
2041
* LPC coefficient precision - used by FLAC encoder
2042
* - encoding: set by user.
2043
* - decoding: unused.
2045
int lpc_coeff_precision;
2048
* - encoding: set by user.
2049
* - decoding: unused.
2051
int min_prediction_order;
2054
* - encoding: set by user.
2055
* - decoding: unused.
2057
int max_prediction_order;
2060
* search method for selecting prediction order
2061
* - encoding: set by user.
2062
* - decoding: unused.
2064
int prediction_order_method;
2067
* - encoding: set by user.
2068
* - decoding: unused.
2070
int min_partition_order;
2073
* - encoding: set by user.
2074
* - decoding: unused.
2076
int max_partition_order;
2079
* GOP timecode frame start number, in non drop frame format
2080
* - encoding: set by user.
2081
* - decoding: unused.
2083
int64_t timecode_frame_start;
2089
typedef struct AVCodec {
2091
enum CodecType type;
2094
int (*init)(AVCodecContext *);
2095
int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2096
int (*close)(AVCodecContext *);
2097
int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2098
uint8_t *buf, int buf_size);
2100
struct AVCodec *next;
2101
void (*flush)(AVCodecContext *);
2102
const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2103
const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2107
* four components are given, that's all.
2108
* the last component is alpha
2110
typedef struct AVPicture {
2112
int linesize[4]; ///< number of bytes per line
2117
* This structure defines a method for communicating palette changes
2118
* between and demuxer and a decoder.
2119
* this is totally broken, palette changes should be sent as AVPackets
2121
#define AVPALETTE_SIZE 1024
2122
#define AVPALETTE_COUNT 256
2123
typedef struct AVPaletteControl {
2125
/* demuxer sets this to 1 to indicate the palette has changed;
2126
* decoder resets to 0 */
2127
int palette_changed;
2129
/* 4-byte ARGB palette entries, stored in native byte order; note that
2130
* the individual palette components should be on a 8-bit scale; if
2131
* the palette data comes from a IBM VGA native format, the component
2132
* data is probably 6 bits in size and needs to be scaled */
2133
unsigned int palette[AVPALETTE_COUNT];
2135
} AVPaletteControl attribute_deprecated;
2137
typedef struct AVSubtitleRect {
2144
uint32_t *rgba_palette;
2148
typedef struct AVSubtitle {
2149
uint16_t format; /* 0 = graphics */
2150
uint32_t start_display_time; /* relative to packet pts, in ms */
2151
uint32_t end_display_time; /* relative to packet pts, in ms */
2153
AVSubtitleRect *rects;
2156
extern AVCodec ac3_encoder;
2157
extern AVCodec amr_nb_encoder;
2158
extern AVCodec amr_wb_encoder;
2159
extern AVCodec asv1_encoder;
2160
extern AVCodec asv2_encoder;
2161
extern AVCodec bmp_encoder;
2162
extern AVCodec dvvideo_encoder;
2163
extern AVCodec faac_encoder;
2164
extern AVCodec ffv1_encoder;
2165
extern AVCodec ffvhuff_encoder;
2166
extern AVCodec flac_encoder;
2167
extern AVCodec flashsv_encoder;
2168
extern AVCodec flv_encoder;
2169
extern AVCodec gif_encoder;
2170
extern AVCodec h261_encoder;
2171
extern AVCodec h263_encoder;
2172
extern AVCodec h263p_encoder;
2173
extern AVCodec h264_encoder;
2174
extern AVCodec huffyuv_encoder;
2175
extern AVCodec jpegls_encoder;
2176
extern AVCodec libgsm_encoder;
2177
extern AVCodec libgsm_ms_encoder;
2178
extern AVCodec libtheora_encoder;
2179
extern AVCodec ljpeg_encoder;
2180
extern AVCodec mdec_encoder;
2181
extern AVCodec mjpeg_encoder;
2182
extern AVCodec mp2_encoder;
2183
extern AVCodec mp3lame_encoder;
2184
extern AVCodec mpeg1video_encoder;
2185
extern AVCodec mpeg2video_encoder;
2186
extern AVCodec mpeg4_encoder;
2187
extern AVCodec msmpeg4v1_encoder;
2188
extern AVCodec msmpeg4v2_encoder;
2189
extern AVCodec msmpeg4v3_encoder;
2190
extern AVCodec oggvorbis_encoder;
2191
extern AVCodec pam_encoder;
2192
extern AVCodec pbm_encoder;
2193
extern AVCodec pgm_encoder;
2194
extern AVCodec pgmyuv_encoder;
2195
extern AVCodec png_encoder;
2196
extern AVCodec ppm_encoder;
2197
extern AVCodec rv10_encoder;
2198
extern AVCodec rv20_encoder;
2199
extern AVCodec snow_encoder;
2200
extern AVCodec sonic_encoder;
2201
extern AVCodec sonic_ls_encoder;
2202
extern AVCodec svq1_encoder;
2203
extern AVCodec vcr1_encoder;
2204
extern AVCodec vorbis_encoder;
2205
extern AVCodec wmav1_encoder;
2206
extern AVCodec wmav2_encoder;
2207
extern AVCodec wmv1_encoder;
2208
extern AVCodec wmv2_encoder;
2209
extern AVCodec x264_encoder;
2210
extern AVCodec xvid_encoder;
2211
extern AVCodec zlib_encoder;
2212
extern AVCodec zmbv_encoder;
2214
extern AVCodec aac_decoder;
2215
extern AVCodec aasc_decoder;
2216
extern AVCodec alac_decoder;
2217
extern AVCodec amr_nb_decoder;
2218
extern AVCodec amr_wb_decoder;
2219
extern AVCodec asv1_decoder;
2220
extern AVCodec asv2_decoder;
2221
extern AVCodec avs_decoder;
2222
extern AVCodec bmp_decoder;
2223
extern AVCodec cavs_decoder;
2224
extern AVCodec cinepak_decoder;
2225
extern AVCodec cljr_decoder;
2226
extern AVCodec cook_decoder;
2227
extern AVCodec cscd_decoder;
2228
extern AVCodec cyuv_decoder;
2229
extern AVCodec dca_decoder;
2230
extern AVCodec dsicinaudio_decoder;
2231
extern AVCodec dsicinvideo_decoder;
2232
extern AVCodec dvvideo_decoder;
2233
extern AVCodec eightbps_decoder;
2234
extern AVCodec ffv1_decoder;
2235
extern AVCodec ffvhuff_decoder;
2236
extern AVCodec flac_decoder;
2237
extern AVCodec flashsv_decoder;
2238
extern AVCodec flic_decoder;
2239
extern AVCodec flv_decoder;
2240
extern AVCodec fourxm_decoder;
2241
extern AVCodec fraps_decoder;
2242
extern AVCodec gif_decoder;
2243
extern AVCodec h261_decoder;
2244
extern AVCodec h263_decoder;
2245
extern AVCodec h263i_decoder;
2246
extern AVCodec h264_decoder;
2247
extern AVCodec huffyuv_decoder;
2248
extern AVCodec idcin_decoder;
2249
extern AVCodec imc_decoder;
2250
extern AVCodec indeo2_decoder;
2251
extern AVCodec indeo3_decoder;
2252
extern AVCodec interplay_dpcm_decoder;
2253
extern AVCodec interplay_video_decoder;
2254
extern AVCodec kmvc_decoder;
2255
extern AVCodec libgsm_decoder;
2256
extern AVCodec libgsm_ms_decoder;
2257
extern AVCodec loco_decoder;
2258
extern AVCodec mace3_decoder;
2259
extern AVCodec mace6_decoder;
2260
extern AVCodec mdec_decoder;
2261
extern AVCodec mjpeg_decoder;
2262
extern AVCodec mjpegb_decoder;
2263
extern AVCodec mmvideo_decoder;
2264
extern AVCodec mp2_decoder;
2265
extern AVCodec mp3_decoder;
2266
extern AVCodec mp3adu_decoder;
2267
extern AVCodec mp3on4_decoder;
2268
extern AVCodec mpc7_decoder;
2269
extern AVCodec mpeg1video_decoder;
2270
extern AVCodec mpeg2video_decoder;
2271
extern AVCodec mpeg4_decoder;
2272
extern AVCodec mpeg4aac_decoder;
2273
extern AVCodec mpeg_xvmc_decoder;
2274
extern AVCodec mpegvideo_decoder;
2275
extern AVCodec msmpeg4v1_decoder;
2276
extern AVCodec msmpeg4v2_decoder;
2277
extern AVCodec msmpeg4v3_decoder;
2278
extern AVCodec msrle_decoder;
2279
extern AVCodec msvideo1_decoder;
2280
extern AVCodec mszh_decoder;
2281
extern AVCodec nuv_decoder;
2282
extern AVCodec oggvorbis_decoder;
2283
extern AVCodec png_decoder;
2284
extern AVCodec qdm2_decoder;
2285
extern AVCodec qdraw_decoder;
2286
extern AVCodec qpeg_decoder;
2287
extern AVCodec qtrle_decoder;
2288
extern AVCodec ra_144_decoder;
2289
extern AVCodec ra_288_decoder;
2290
extern AVCodec roq_decoder;
2291
extern AVCodec roq_dpcm_decoder;
2292
extern AVCodec rpza_decoder;
2293
extern AVCodec rv10_decoder;
2294
extern AVCodec rv20_decoder;
2295
extern AVCodec rv30_decoder;
2296
extern AVCodec rv40_decoder;
2297
extern AVCodec shorten_decoder;
2298
extern AVCodec smackaud_decoder;
2299
extern AVCodec smacker_decoder;
2300
extern AVCodec smc_decoder;
2301
extern AVCodec snow_decoder;
2302
extern AVCodec sol_dpcm_decoder;
2303
extern AVCodec sonic_decoder;
2304
extern AVCodec sp5x_decoder;
2305
extern AVCodec svq1_decoder;
2306
extern AVCodec svq3_decoder;
2307
extern AVCodec targa_decoder;
2308
extern AVCodec theora_decoder;
2309
extern AVCodec tiertexseqvideo_decoder;
2310
extern AVCodec tiff_decoder;
2311
extern AVCodec truemotion1_decoder;
2312
extern AVCodec truemotion2_decoder;
2313
extern AVCodec truespeech_decoder;
2314
extern AVCodec tscc_decoder;
2315
extern AVCodec tta_decoder;
2316
extern AVCodec ulti_decoder;
2317
extern AVCodec vc1_decoder;
2318
extern AVCodec vcr1_decoder;
2319
extern AVCodec vmdaudio_decoder;
2320
extern AVCodec vmdvideo_decoder;
2321
extern AVCodec vmnc_decoder;
2322
extern AVCodec vorbis_decoder;
2323
extern AVCodec vp3_decoder;
2324
extern AVCodec vp5_decoder;
2325
extern AVCodec vp6_decoder;
2326
extern AVCodec vp6f_decoder;
2327
extern AVCodec vqa_decoder;
2328
extern AVCodec wavpack_decoder;
2329
extern AVCodec wmav1_decoder;
2330
extern AVCodec wmav2_decoder;
2331
extern AVCodec wmv1_decoder;
2332
extern AVCodec wmv2_decoder;
2333
extern AVCodec wmv3_decoder;
2334
extern AVCodec wnv1_decoder;
2335
extern AVCodec ws_snd1_decoder;
2336
extern AVCodec xan_dpcm_decoder;
2337
extern AVCodec xan_wc3_decoder;
2338
extern AVCodec xl_decoder;
2339
extern AVCodec zlib_decoder;
2340
extern AVCodec zmbv_decoder;
2343
#define PCM_CODEC(id, name) \
2344
extern AVCodec name ## _decoder; \
2345
extern AVCodec name ## _encoder
2347
PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2348
PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2349
PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2350
PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2351
PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2352
PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2353
PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2354
PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2355
PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2356
PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2357
PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2358
PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2359
PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2360
PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2361
PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2362
PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2363
PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2367
PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2368
PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2369
PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2370
PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2371
PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2372
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2373
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2374
PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2375
PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2376
PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2377
PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2378
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2379
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2380
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2381
PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2382
PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2383
PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2384
PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2388
/* dummy raw video codec */
2389
extern AVCodec rawvideo_decoder;
2390
extern AVCodec rawvideo_encoder;
2392
/* the following codecs use external GPL libs */
2393
extern AVCodec dts_decoder;
2394
extern AVCodec liba52_decoder;
2397
extern AVCodec dvbsub_decoder;
2398
extern AVCodec dvbsub_encoder;
2399
extern AVCodec dvdsub_decoder;
2400
extern AVCodec dvdsub_encoder;
2404
struct ReSampleContext;
2405
struct AVResampleContext;
2407
typedef struct ReSampleContext ReSampleContext;
2409
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2410
int output_rate, int input_rate);
2411
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2412
void audio_resample_close(ReSampleContext *s);
2414
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2415
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2416
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2417
void av_resample_close(struct AVResampleContext *c);
2419
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2420
/* YUV420 format is assumed ! */
2422
struct ImgReSampleContext attribute_deprecated;
2424
typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
2426
attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
2427
int input_width, int input_height);
2429
attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2430
int iwidth, int iheight,
2431
int topBand, int bottomBand,
2432
int leftBand, int rightBand,
2433
int padtop, int padbottom,
2434
int padleft, int padright);
2437
attribute_deprecated void img_resample(ImgReSampleContext *s,
2438
AVPicture *output, const AVPicture *input);
2440
attribute_deprecated void img_resample_close(ImgReSampleContext *s);
2445
* Allocate memory for a picture. Call avpicture_free to free it.
2447
* @param picture the picture to be filled in.
2448
* @param pix_fmt the format of the picture.
2449
* @param width the width of the picture.
2450
* @param height the height of the picture.
2451
* @return Zero if successful, a negative value if not.
2453
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2456
* Free a picture previously allocated by avpicture_alloc().
2458
* @param picture The AVPicture to be freed.
2460
void avpicture_free(AVPicture *picture);
2463
* Fill in AVPicture's fields.
2464
* The fields of the given AVPicture are filled in by using the 'ptr' address
2465
* which points to the image data buffer. Depending on the specified picture
2466
* format, one or multiple image data pointers and line sizes will be set.
2467
* If a planar format is specified, several pointers will be set pointing to
2468
* the different picture planes and the line sizes of the different planes
2469
* will be stored in the lines_sizes array.
2471
* @param picture AVPicture who's fields are to be filled in
2472
* @param ptr Buffer which will contain or contains the actual image data
2473
* @param pix_fmt The format in which the picture data is stored
2474
* @param width The width of the image in pixels
2475
* @param height The height of the image in pixels
2476
* @return Size of the image data in bytes.
2478
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2479
int pix_fmt, int width, int height);
2480
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2481
unsigned char *dest, int dest_size);
2484
* Calculate the size in bytes that a picture of the given width and height
2485
* would occupy if stored in the given picture format.
2487
* @param pix_fmt The given picture format
2488
* @param width The width of the image
2489
* @param height The height of the image
2490
* @return Image data size in bytes
2492
int avpicture_get_size(int pix_fmt, int width, int height);
2493
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2494
const char *avcodec_get_pix_fmt_name(int pix_fmt);
2495
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2496
enum PixelFormat avcodec_get_pix_fmt(const char* name);
2497
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2499
#define FF_LOSS_RESOLUTION 0x0001 /**< loss due to resolution change */
2500
#define FF_LOSS_DEPTH 0x0002 /**< loss due to color depth change */
2501
#define FF_LOSS_COLORSPACE 0x0004 /**< loss due to color space conversion */
2502
#define FF_LOSS_ALPHA 0x0008 /**< loss of alpha bits */
2503
#define FF_LOSS_COLORQUANT 0x0010 /**< loss due to color quantization */
2504
#define FF_LOSS_CHROMA 0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2507
* Computes what kind of losses will occur when converting from one specific
2508
* pixel format to another.
2509
* When converting from one pixel format to another, information loss may occur.
2510
* For example, when converting from RGB24 to GRAY, the color information will
2511
* be lost. Similarly, other losses occur when converting from some formats to
2512
* other formats. These losses can involve loss of chroma, but also loss of
2513
* resolution, loss of color depth, loss due to the color space conversion, loss
2514
* of the alpha bits or loss due to color quantization.
2515
* avcodec_get_fix_fmt_loss() informs you on the various types of losses which
2516
* will occur when converting from one pixel format to another.
2518
* @param[in] dst_pix_fmt Destination pixel format.
2519
* @param[in] src_pix_fmt Source pixel format.
2520
* @param[in] has_alpha Whether the source pixel format alpha channel is used.
2521
* @return Combination of flags informing you what kind of losses will occur.
2523
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2527
* Finds the best pixel format to convert to given a certain source pixel
2528
* format. When converting from one pixel format to another, information loss
2529
* may occur. For example, when converting from RGB24 to GRAY, the color
2530
* information will be lost. Similarly, other losses occur when converting from
2531
* some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2532
* the given pixel formats should be used to undergo the least amount of losses.
2533
* The pixel formats from which it choses one, are determined by the
2534
* \p pix_fmt_mask parameter.
2537
* src_pix_fmt = PIX_FMT_YUV420P;
2538
* pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2539
* dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2542
* @param[in] pix_fmt_mask Bitmask determining which pixel format to choose from.
2543
* @param[in] src_pix_fmt Source pixel format.
2544
* @param[in] has_alpha Whether the source pixel format alpha channel is used.
2545
* @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2546
* @return The best pixel format to convert to or -1 if none was found.
2548
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2549
int has_alpha, int *loss_ptr);
2551
#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2552
#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2555
* Tell if an image really has transparent alpha values.
2556
* @return ored mask of FF_ALPHA_xxx constants
2558
int img_get_alpha_info(const AVPicture *src,
2559
int pix_fmt, int width, int height);
2561
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2562
/* convert among pixel formats */
2563
attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
2564
const AVPicture *src, int pix_fmt,
2565
int width, int height);
2568
/* deinterlace a picture */
2569
/* deinterlace - if not supported return -1 */
2570
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2571
int pix_fmt, int width, int height);
2573
/* external high level API */
2575
extern AVCodec *first_avcodec;
2577
/* returns LIBAVCODEC_VERSION_INT constant */
2578
unsigned avcodec_version(void);
2579
/* returns LIBAVCODEC_BUILD constant */
2580
unsigned avcodec_build(void);
2583
* Initializes libavcodec.
2585
* @warning This function \e must be called before any other libavcodec
2588
void avcodec_init(void);
2590
void register_avcodec(AVCodec *format);
2593
* Finds an encoder with a matching codec ID.
2595
* @param id CodecID of the requested encoder.
2596
* @return An encoder if one was found, NULL otherwise.
2598
AVCodec *avcodec_find_encoder(enum CodecID id);
2601
* Finds an encoder with the specified name.
2603
* @param name Name of the requested encoder.
2604
* @return An encoder if one was found, NULL otherwise.
2606
AVCodec *avcodec_find_encoder_by_name(const char *name);
2609
* Finds a decoder with a matching codec ID.
2611
* @param id CodecID of the requested decoder.
2612
* @return A decoder if one was found, NULL otherwise.
2614
AVCodec *avcodec_find_decoder(enum CodecID id);
2617
* Finds an decoder with the specified name.
2619
* @param name Name of the requested decoder.
2620
* @return A decoder if one was found, NULL otherwise.
2622
AVCodec *avcodec_find_decoder_by_name(const char *name);
2623
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2626
* Sets the fields of the given AVCodecContext to default values.
2628
* @param s The AVCodecContext of which the fields should be set to default values.
2630
void avcodec_get_context_defaults(AVCodecContext *s);
2633
* Allocates an AVCodecContext and sets its fields to default values. The
2634
* resulting struct can be deallocated by simply calling av_free().
2636
* @return An AVCodecContext filled with default values or NULL on failure.
2637
* @see avcodec_get_context_defaults
2639
AVCodecContext *avcodec_alloc_context(void);
2642
* Sets the fields of the given AVFrame to default values.
2644
* @param pic The AVFrame of which the fields should be set to default values.
2646
void avcodec_get_frame_defaults(AVFrame *pic);
2649
* Allocates an AVFrame and sets its fields to default values. The resulting
2650
* struct can be deallocated by simply calling av_free().
2652
* @return An AVFrame filled with default values or NULL on failure.
2653
* @see avcodec_get_frame_defaults
2655
AVFrame *avcodec_alloc_frame(void);
2657
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2658
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2659
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2660
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2663
* Checks if the given dimension of a picture is valid, meaning that all
2664
* bytes of the picture can be addressed with a signed int.
2666
* @param[in] w Width of the picture.
2667
* @param[in] h Height of the picture.
2668
* @return Zero if valid, a negative value if invalid.
2670
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2671
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2673
int avcodec_thread_init(AVCodecContext *s, int thread_count);
2674
void avcodec_thread_free(AVCodecContext *s);
2675
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2676
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2677
//FIXME func typedef
2680
* Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2681
* function the context has to be allocated.
2683
* The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2684
* avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2685
* retrieving a codec.
2687
* @warning This function is not thread save!
2690
* codec = avcodec_find_decoder(CODEC_ID_H264);
2694
* context = avcodec_alloc_context();
2696
* if (avcodec_open(context, codec) < 0)
2700
* @param avctx The context which will be setup to use the given codec.
2701
* @param codec The codec to use within the context.
2702
* @return Zero on success, a negative value on error.
2703
* @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
2705
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2708
* @deprecated Use avcodec_decode_audio2() instead.
2710
attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2711
int *frame_size_ptr,
2712
uint8_t *buf, int buf_size);
2715
* Decodes an audio frame from \p buf into \p samples.
2716
* The avcodec_decode_audio2() function decodes a frame of audio from the input
2717
* buffer \p buf of size \p buf_size. To decode it, it makes use of the
2718
* audiocodec which was coupled with \p avctx using avcodec_open(). The
2719
* resulting decoded frame is stored in output buffer \p samples. If no frame
2720
* could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2721
* decompressed frame size in \e bytes.
2723
* @warning You \e must set \p frame_size_ptr to the allocated size of the
2724
* output buffer before calling avcodec_decode_audio2().
2726
* @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2727
* the actual read bytes because some optimized bitstream readers read 32 or 64
2728
* bits at once and could read over the end.
2730
* @warning The end of the input buffer \p buf should be set to 0 to ensure that
2731
* no overreading happens for damaged MPEG streams.
2733
* @note You might have to align the input buffer \p buf and output buffer \p
2734
* samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2735
* necessary at all, on others it won't work at all if not aligned and on others
2736
* it will work but it will have an impact on performance. In practice, the
2737
* bitstream should have 4 byte alignment at minimum and all sample data should
2738
* be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2739
* the linesize is not a multiple of 16 then there's no sense in aligning the
2740
* start of the buffer to 16.
2742
* @param avctx The codec context.
2743
* @param[out] samples The output buffer.
2744
* @param[in,out] frame_size_ptr The output buffer size in bytes.
2745
* @param[in] buf The input buffer.
2746
* @param[in] buf_size The input buffer size in bytes.
2747
* @return On error a negative value is returned, otherwise the number of bytes
2748
* used or zero if no frame could be decompressed.
2750
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2751
int *frame_size_ptr,
2752
uint8_t *buf, int buf_size);
2755
* Decodes a video frame from \p buf into \p picture.
2756
* The avcodec_decode_video() function decodes a frame of video from the input
2757
* buffer \p buf of size \p buf_size. To decode it, it makes use of the
2758
* videocodec which was coupled with \p avctx using avcodec_open(). The
2759
* resulting decoded frame is stored in \p picture.
2761
* @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2762
* the actual read bytes because some optimized bitstream readers read 32 or 64
2763
* bits at once and could read over the end.
2765
* @warning The end of the input buffer \p buf should be set to 0 to ensure that
2766
* no overreading happens for damaged MPEG streams.
2768
* @note You might have to align the input buffer \p buf and output buffer \p
2769
* samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2770
* necessary at all, on others it won't work at all if not aligned and on others
2771
* it will work but it will have an impact on performance. In practice, the
2772
* bitstream should have 4 byte alignment at minimum and all sample data should
2773
* be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2774
* the linesize is not a multiple of 16 then there's no sense in aligning the
2775
* start of the buffer to 16.
2777
* @param avctx The codec context.
2778
* @param[out] picture The AVFrame in which the decoded video frame will be stored.
2779
* @param[in] buf The input buffer.
2780
* @param[in] buf_size The size of the input buffer in bytes.
2781
* @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is non zero.
2782
* @return On error a negative value is returned, otherwise the number of bytes
2783
* used or zero if no frame could be decompressed.
2785
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2786
int *got_picture_ptr,
2787
uint8_t *buf, int buf_size);
2789
/* decode a subtitle message. return -1 if error, otherwise return the
2790
*number of bytes used. If no subtitle could be decompressed,
2791
*got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
2792
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2794
const uint8_t *buf, int buf_size);
2795
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2797
uint8_t *buf, int buf_size);
2800
* Encodes an audio frame from \p samples into \p buf.
2801
* The avcodec_encode_audio() function encodes a frame of audio from the input
2802
* buffer \p samples. To encode it, it makes use of the audiocodec which was
2803
* coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2804
* stored in output buffer \p buf.
2806
* @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2808
* @param avctx The codec context.
2809
* @param[out] buf The output buffer.
2810
* @param[in] buf_size The output buffer size.
2811
* @param[in] samples The input buffer containing the samples.
2812
* @return On error a negative value is returned, on succes zero or the number
2813
* of bytes used from the input buffer.
2815
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2816
const short *samples);
2819
* Encodes a video frame from \p pict into \p buf.
2820
* The avcodec_encode_video() function encodes a frame of video from the input
2821
* \p pict. To encode it, it makes use of the videocodec which was coupled with
2822
* \p avctx using avcodec_open(). The resulting encoded bytes representing the
2823
* frame are stored in the output buffer \p buf. The input picture should be
2824
* stored using a specific format, namely \c avctx.pix_fmt.
2826
* @param avctx The codec context.
2827
* @param[out] buf The output buffer for the bitstream of encoded frame.
2828
* @param[in] buf_size The size of the outputbuffer in bytes.
2829
* @param[in] pict The input picture to encode.
2830
* @return On error a negative value is returned, on success zero or the number
2831
* of bytes used from the input buffer.
2833
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2834
const AVFrame *pict);
2835
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2836
const AVSubtitle *sub);
2838
int avcodec_close(AVCodecContext *avctx);
2840
void avcodec_register_all(void);
2843
* Flush buffers, should be called when seeking or when switching to a different stream.
2845
void avcodec_flush_buffers(AVCodecContext *avctx);
2847
void avcodec_default_free_buffers(AVCodecContext *s);
2849
/* misc useful functions */
2852
* Returns a single letter to describe the given picture type \p pict_type.
2854
* @param[in] pict_type The picture type.
2855
* @return A single character representing the picture type.
2857
char av_get_pict_type_char(int pict_type);
2860
* Returns codec bits per sample.
2862
* @param[in] codec_id The codec.
2863
* @return Number of bits per sample or zero if unknown for the given codec.
2865
int av_get_bits_per_sample(enum CodecID codec_id);
2868
typedef struct AVCodecParserContext {
2870
struct AVCodecParser *parser;
2871
int64_t frame_offset; /* offset of the current frame */
2872
int64_t cur_offset; /* current offset
2873
(incremented by each av_parser_parse()) */
2874
int64_t last_frame_offset; /* offset of the last frame */
2876
int pict_type; /* XXX: put it back in AVCodecContext */
2877
int repeat_pict; /* XXX: put it back in AVCodecContext */
2878
int64_t pts; /* pts of the current frame */
2879
int64_t dts; /* dts of the current frame */
2884
int fetch_timestamp;
2886
#define AV_PARSER_PTS_NB 4
2887
int cur_frame_start_index;
2888
int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2889
int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2890
int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2893
#define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2894
} AVCodecParserContext;
2896
typedef struct AVCodecParser {
2897
int codec_ids[5]; /* several codec IDs are permitted */
2899
int (*parser_init)(AVCodecParserContext *s);
2900
int (*parser_parse)(AVCodecParserContext *s,
2901
AVCodecContext *avctx,
2902
uint8_t **poutbuf, int *poutbuf_size,
2903
const uint8_t *buf, int buf_size);
2904
void (*parser_close)(AVCodecParserContext *s);
2905
int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2906
struct AVCodecParser *next;
2909
extern AVCodecParser *av_first_parser;
2911
void av_register_codec_parser(AVCodecParser *parser);
2912
AVCodecParserContext *av_parser_init(int codec_id);
2913
int av_parser_parse(AVCodecParserContext *s,
2914
AVCodecContext *avctx,
2915
uint8_t **poutbuf, int *poutbuf_size,
2916
const uint8_t *buf, int buf_size,
2917
int64_t pts, int64_t dts);
2918
int av_parser_change(AVCodecParserContext *s,
2919
AVCodecContext *avctx,
2920
uint8_t **poutbuf, int *poutbuf_size,
2921
const uint8_t *buf, int buf_size, int keyframe);
2922
void av_parser_close(AVCodecParserContext *s);
2924
extern AVCodecParser aac_parser;
2925
extern AVCodecParser ac3_parser;
2926
extern AVCodecParser cavsvideo_parser;
2927
extern AVCodecParser dca_parser;
2928
extern AVCodecParser dvbsub_parser;
2929
extern AVCodecParser dvdsub_parser;
2930
extern AVCodecParser h261_parser;
2931
extern AVCodecParser h263_parser;
2932
extern AVCodecParser h264_parser;
2933
extern AVCodecParser mjpeg_parser;
2934
extern AVCodecParser mpeg4video_parser;
2935
extern AVCodecParser mpegaudio_parser;
2936
extern AVCodecParser mpegvideo_parser;
2937
extern AVCodecParser pnm_parser;
2938
extern AVCodecParser vc1_parser;
2941
typedef struct AVBitStreamFilterContext {
2943
struct AVBitStreamFilter *filter;
2944
AVCodecParserContext *parser;
2945
struct AVBitStreamFilterContext *next;
2946
} AVBitStreamFilterContext;
2949
typedef struct AVBitStreamFilter {
2952
int (*filter)(AVBitStreamFilterContext *bsfc,
2953
AVCodecContext *avctx, const char *args,
2954
uint8_t **poutbuf, int *poutbuf_size,
2955
const uint8_t *buf, int buf_size, int keyframe);
2956
struct AVBitStreamFilter *next;
2957
} AVBitStreamFilter;
2959
extern AVBitStreamFilter *av_first_bitstream_filter;
2961
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2962
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2963
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2964
AVCodecContext *avctx, const char *args,
2965
uint8_t **poutbuf, int *poutbuf_size,
2966
const uint8_t *buf, int buf_size, int keyframe);
2967
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2969
extern AVBitStreamFilter dump_extradata_bsf;
2970
extern AVBitStreamFilter remove_extradata_bsf;
2971
extern AVBitStreamFilter noise_bsf;
2972
extern AVBitStreamFilter mp3_header_compress_bsf;
2973
extern AVBitStreamFilter mp3_header_decompress_bsf;
2974
extern AVBitStreamFilter mjpega_dump_header_bsf;
2980
* Reallocates the given block if it is not large enough, otherwise it
2985
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2987
/* for static data only */
2990
* Frees all static arrays and reset their pointers to 0.
2991
* Call this function to release all statically allocated tables.
2993
void av_free_static(void);
2996
* Allocation of static arrays.
2998
* @warning Do not use for normal allocation.
3000
* @param[in] size The amount of memory you need in bytes.
3001
* @return Block of memory of the requested size.
3003
void *av_mallocz_static(unsigned int size);
3006
* Copy image 'src' to 'dst'.
3008
void img_copy(AVPicture *dst, const AVPicture *src,
3009
int pix_fmt, int width, int height);
3012
* Crop image top and left side
3014
int img_crop(AVPicture *dst, const AVPicture *src,
3015
int pix_fmt, int top_band, int left_band);
3020
int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
3021
int padtop, int padbottom, int padleft, int padright, int *color);
3023
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
3025
/* error handling */
3027
#define AVERROR(e) (-(e)) /**< returns a negative error code from a POSIX error code, to return from library functions. */
3028
#define AVUNERROR(e) (-(e)) /**< returns a POSIX error code from a library function error return value. */
3030
/* some platforms have E* and errno already negated. */
3031
#define AVERROR(e) (e)
3032
#define AVUNERROR(e) (e)
3034
#define AVERROR_UNKNOWN AVERROR(EINVAL) /**< unknown error */
3035
#define AVERROR_IO AVERROR(EIO) /**< i/o error */
3036
#define AVERROR_NUMEXPECTED AVERROR(EDOM) /**< number syntax expected in filename */
3037
#define AVERROR_INVALIDDATA AVERROR(EINVAL) /**< invalid data found */
3038
#define AVERROR_NOMEM AVERROR(ENOMEM) /**< not enough memory */
3039
#define AVERROR_NOFMT AVERROR(EILSEQ) /**< unknown format */
3040
#define AVERROR_NOTSUPP AVERROR(ENOSYS) /**< operation not supported */
3046
#endif /* AVCODEC_H */
added
removed
ffmpeg/avcodec.h
