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ffmpeg/libavcodec/avcodec.h
Michael Niedermayer eacb41b2e9 mp3 header (de)compression bitstream filter 
this will make mp3 frames 4 bytes smaller, it will not give you binary identical mp3 files, but it will give you mp3 files which decode to binary identical output
this will only work in containers providing at least packet size, sample_rate and number of channels
bugreports about mp3 files for which this fails are welcome
and this is experimental (dont expect compatibility and dont even expect to be able to decompress what you compressed, hell dont even expect this to work without editing the source a little)

Originally committed as revision 6958 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-11-10 01:41:53 +00:00

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/*
* copyright (c) 2001 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_H
#define AVCODEC_H
/**
* @file avcodec.h
* external api header.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include "avutil.h"
#include <sys/types.h> /* size_t */
#define AV_STRINGIFY(s) AV_TOSTRING(s)
#define AV_TOSTRING(s) #s
#define LIBAVCODEC_VERSION_INT ((51<<16)+(25<<8)+0)
#define LIBAVCODEC_VERSION 51.25.0
#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
#define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
#define AV_TIME_BASE 1000000
#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
enum CodecID {
CODEC_ID_NONE,
CODEC_ID_MPEG1VIDEO,
CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
CODEC_ID_MPEG2VIDEO_XVMC,
CODEC_ID_H261,
CODEC_ID_H263,
CODEC_ID_RV10,
CODEC_ID_RV20,
CODEC_ID_MJPEG,
CODEC_ID_MJPEGB,
CODEC_ID_LJPEG,
CODEC_ID_SP5X,
CODEC_ID_JPEGLS,
CODEC_ID_MPEG4,
CODEC_ID_RAWVIDEO,
CODEC_ID_MSMPEG4V1,
CODEC_ID_MSMPEG4V2,
CODEC_ID_MSMPEG4V3,
CODEC_ID_WMV1,
CODEC_ID_WMV2,
CODEC_ID_H263P,
CODEC_ID_H263I,
CODEC_ID_FLV1,
CODEC_ID_SVQ1,
CODEC_ID_SVQ3,
CODEC_ID_DVVIDEO,
CODEC_ID_HUFFYUV,
CODEC_ID_CYUV,
CODEC_ID_H264,
CODEC_ID_INDEO3,
CODEC_ID_VP3,
CODEC_ID_THEORA,
CODEC_ID_ASV1,
CODEC_ID_ASV2,
CODEC_ID_FFV1,
CODEC_ID_4XM,
CODEC_ID_VCR1,
CODEC_ID_CLJR,
CODEC_ID_MDEC,
CODEC_ID_ROQ,
CODEC_ID_INTERPLAY_VIDEO,
CODEC_ID_XAN_WC3,
CODEC_ID_XAN_WC4,
CODEC_ID_RPZA,
CODEC_ID_CINEPAK,
CODEC_ID_WS_VQA,
CODEC_ID_MSRLE,
CODEC_ID_MSVIDEO1,
CODEC_ID_IDCIN,
CODEC_ID_8BPS,
CODEC_ID_SMC,
CODEC_ID_FLIC,
CODEC_ID_TRUEMOTION1,
CODEC_ID_VMDVIDEO,
CODEC_ID_MSZH,
CODEC_ID_ZLIB,
CODEC_ID_QTRLE,
CODEC_ID_SNOW,
CODEC_ID_TSCC,
CODEC_ID_ULTI,
CODEC_ID_QDRAW,
CODEC_ID_VIXL,
CODEC_ID_QPEG,
CODEC_ID_XVID,
CODEC_ID_PNG,
CODEC_ID_PPM,
CODEC_ID_PBM,
CODEC_ID_PGM,
CODEC_ID_PGMYUV,
CODEC_ID_PAM,
CODEC_ID_FFVHUFF,
CODEC_ID_RV30,
CODEC_ID_RV40,
CODEC_ID_VC1,
CODEC_ID_WMV3,
CODEC_ID_LOCO,
CODEC_ID_WNV1,
CODEC_ID_AASC,
CODEC_ID_INDEO2,
CODEC_ID_FRAPS,
CODEC_ID_TRUEMOTION2,
CODEC_ID_BMP,
CODEC_ID_CSCD,
CODEC_ID_MMVIDEO,
CODEC_ID_ZMBV,
CODEC_ID_AVS,
CODEC_ID_SMACKVIDEO,
CODEC_ID_NUV,
CODEC_ID_KMVC,
CODEC_ID_FLASHSV,
CODEC_ID_CAVS,
CODEC_ID_JPEG2000,
CODEC_ID_VMNC,
CODEC_ID_VP5,
CODEC_ID_VP6,
CODEC_ID_VP6F,
CODEC_ID_TARGA,
CODEC_ID_DSICINVIDEO,
CODEC_ID_TIERTEXSEQVIDEO,
CODEC_ID_TIFF,
CODEC_ID_GIF,
/* various pcm "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
CODEC_ID_PCM_S16BE,
CODEC_ID_PCM_U16LE,
CODEC_ID_PCM_U16BE,
CODEC_ID_PCM_S8,
CODEC_ID_PCM_U8,
CODEC_ID_PCM_MULAW,
CODEC_ID_PCM_ALAW,
CODEC_ID_PCM_S32LE,
CODEC_ID_PCM_S32BE,
CODEC_ID_PCM_U32LE,
CODEC_ID_PCM_U32BE,
CODEC_ID_PCM_S24LE,
CODEC_ID_PCM_S24BE,
CODEC_ID_PCM_U24LE,
CODEC_ID_PCM_U24BE,
CODEC_ID_PCM_S24DAUD,
/* various adpcm codecs */
CODEC_ID_ADPCM_IMA_QT= 0x11000,
CODEC_ID_ADPCM_IMA_WAV,
CODEC_ID_ADPCM_IMA_DK3,
CODEC_ID_ADPCM_IMA_DK4,
CODEC_ID_ADPCM_IMA_WS,
CODEC_ID_ADPCM_IMA_SMJPEG,
CODEC_ID_ADPCM_MS,
CODEC_ID_ADPCM_4XM,
CODEC_ID_ADPCM_XA,
CODEC_ID_ADPCM_ADX,
CODEC_ID_ADPCM_EA,
CODEC_ID_ADPCM_G726,
CODEC_ID_ADPCM_CT,
CODEC_ID_ADPCM_SWF,
CODEC_ID_ADPCM_YAMAHA,
CODEC_ID_ADPCM_SBPRO_4,
CODEC_ID_ADPCM_SBPRO_3,
CODEC_ID_ADPCM_SBPRO_2,
/* AMR */
CODEC_ID_AMR_NB= 0x12000,
CODEC_ID_AMR_WB,
/* RealAudio codecs*/
CODEC_ID_RA_144= 0x13000,
CODEC_ID_RA_288,
/* various DPCM codecs */
CODEC_ID_ROQ_DPCM= 0x14000,
CODEC_ID_INTERPLAY_DPCM,
CODEC_ID_XAN_DPCM,
CODEC_ID_SOL_DPCM,
CODEC_ID_MP2= 0x15000,
CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
CODEC_ID_AAC,
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
CODEC_ID_MPEG4AAC,
#endif
CODEC_ID_AC3,
CODEC_ID_DTS,
CODEC_ID_VORBIS,
CODEC_ID_DVAUDIO,
CODEC_ID_WMAV1,
CODEC_ID_WMAV2,
CODEC_ID_MACE3,
CODEC_ID_MACE6,
CODEC_ID_VMDAUDIO,
CODEC_ID_SONIC,
CODEC_ID_SONIC_LS,
CODEC_ID_FLAC,
CODEC_ID_MP3ADU,
CODEC_ID_MP3ON4,
CODEC_ID_SHORTEN,
CODEC_ID_ALAC,
CODEC_ID_WESTWOOD_SND1,
CODEC_ID_GSM,
CODEC_ID_QDM2,
CODEC_ID_COOK,
CODEC_ID_TRUESPEECH,
CODEC_ID_TTA,
CODEC_ID_SMACKAUDIO,
CODEC_ID_QCELP,
CODEC_ID_WAVPACK,
CODEC_ID_DSICINAUDIO,
CODEC_ID_IMC,
/* subtitle codecs */
CODEC_ID_DVD_SUBTITLE= 0x17000,
CODEC_ID_DVB_SUBTITLE,
CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
stream (only used by libavformat) */
};
/* CODEC_ID_MP3LAME is absolete */
#define CODEC_ID_MP3LAME CODEC_ID_MP3
enum CodecType {
CODEC_TYPE_UNKNOWN = -1,
CODEC_TYPE_VIDEO,
CODEC_TYPE_AUDIO,
CODEC_TYPE_DATA,
CODEC_TYPE_SUBTITLE,
};
/* currently unused, may be used if 24/32 bits samples ever supported */
/* all in native endian */
enum SampleFormat {
SAMPLE_FMT_NONE = -1,
SAMPLE_FMT_U8, ///< unsigned 8 bits
SAMPLE_FMT_S16, ///< signed 16 bits
SAMPLE_FMT_S24, ///< signed 24 bits
SAMPLE_FMT_S32, ///< signed 32 bits
SAMPLE_FMT_FLT, ///< float
};
/* in bytes */
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
/**
* Required number of additionally allocated bytes at the end of the input bitstream for decoding.
* this is mainly needed because some optimized bitstream readers read
* 32 or 64 bit at once and could read over the end<br>
* Note, if the first 23 bits of the additional bytes are not 0 then damaged
* MPEG bitstreams could cause overread and segfault
*/
#define FF_INPUT_BUFFER_PADDING_SIZE 8
/**
* minimum encoding buffer size.
* used to avoid some checks during header writing
*/
#define FF_MIN_BUFFER_SIZE 16384
/* motion estimation type, EPZS by default */
enum Motion_Est_ID {
ME_ZERO = 1,
ME_FULL,
ME_LOG,
ME_PHODS,
ME_EPZS,
ME_X1,
ME_HEX,
ME_UMH,
ME_ITER,
};
enum AVDiscard{
//we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
AVDISCARD_NONE =-16, ///< discard nothing
AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
AVDISCARD_NONREF = 8, ///< discard all non reference
AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
AVDISCARD_ALL = 48, ///< discard all
};
typedef struct RcOverride{
int start_frame;
int end_frame;
int qscale; // if this is 0 then quality_factor will be used instead
float quality_factor;
} RcOverride;
#define FF_MAX_B_FRAMES 16
/* encoding support
these flags can be passed in AVCodecContext.flags before initing
Note: not everything is supported yet.
*/
#define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
#define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
#define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
#define CODEC_FLAG_GMC 0x0020 ///< use GMC
#define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
#define CODEC_FLAG_PART 0x0080 ///< use data partitioning
/* parent program gurantees that the input for b-frame containing streams is not written to
for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
#define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
#define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
#define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
#define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
#define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
#define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
#define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
of only at frame boundaries */
#define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
#define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
#define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
#define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
#define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
#define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
#define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
/* Fx : Flag for h263+ extra options */
#define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
#define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
#define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
#define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
#define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
#define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
#define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
#define CODEC_FLAG_CLOSED_GOP ((int)0x80000000)
#define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
#define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
#define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
#define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
#define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
#define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
#define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
#define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
#define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
#define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
#define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
#define CODEC_FLAG2_INTRA_VLC 0x00000800 ///< use MPEG-2 intra VLC table
#define CODEC_FLAG2_MEMC_ONLY 0x00001000 ///< only do ME/MC (I frames -> ref, P frame -> ME+MC)
#define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format
/* Unsupported options :
* Syntax Arithmetic coding (SAC)
* Reference Picture Selection
* Independant Segment Decoding */
/* /Fx */
/* codec capabilities */
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
/**
* Codec uses get_buffer() for allocating buffers.
* direct rendering method 1
*/
#define CODEC_CAP_DR1 0x0002
/* if 'parse_only' field is true, then avcodec_parse_frame() can be
used */
#define CODEC_CAP_PARSE_ONLY 0x0004
#define CODEC_CAP_TRUNCATED 0x0008
/* codec can export data for HW decoding (XvMC) */
#define CODEC_CAP_HWACCEL 0x0010
/**
* codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
* if this is not set, the codec is guranteed to never be feeded with NULL data
*/
#define CODEC_CAP_DELAY 0x0020
/**
* Codec can be fed a final frame with a smaller size.
* This can be used to prevent truncation of the last audio samples.
*/
#define CODEC_CAP_SMALL_LAST_FRAME 0x0040
//the following defines may change, don't expect compatibility if you use them
#define MB_TYPE_INTRA4x4 0x0001
#define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
#define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
#define MB_TYPE_16x16 0x0008
#define MB_TYPE_16x8 0x0010
#define MB_TYPE_8x16 0x0020
#define MB_TYPE_8x8 0x0040
#define MB_TYPE_INTERLACED 0x0080
#define MB_TYPE_DIRECT2 0x0100 //FIXME
#define MB_TYPE_ACPRED 0x0200
#define MB_TYPE_GMC 0x0400
#define MB_TYPE_SKIP 0x0800
#define MB_TYPE_P0L0 0x1000
#define MB_TYPE_P1L0 0x2000
#define MB_TYPE_P0L1 0x4000
#define MB_TYPE_P1L1 0x8000
#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
#define MB_TYPE_QUANT 0x00010000
#define MB_TYPE_CBP 0x00020000
//Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
/**
* Pan Scan area.
* this specifies the area which should be displayed. Note there may be multiple such areas for one frame
*/
typedef struct AVPanScan{
/**
* id.
* - encoding: set by user.
* - decoding: set by lavc
*/
int id;
/**
* width and height in 1/16 pel
* - encoding: set by user.
* - decoding: set by lavc
*/
int width;
int height;
/**
* position of the top left corner in 1/16 pel for up to 3 fields/frames.
* - encoding: set by user.
* - decoding: set by lavc
*/
int16_t position[3][2];
}AVPanScan;
#define FF_COMMON_FRAME \
/**\
* pointer to the picture planes.\
* this might be different from the first allocated byte\
* - encoding: \
* - decoding: \
*/\
uint8_t *data[4];\
int linesize[4];\
/**\
* pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
* this isn't used by lavc unless the default get/release_buffer() is used\
* - encoding: \
* - decoding: \
*/\
uint8_t *base[4];\
/**\
* 1 -> keyframe, 0-> not\
* - encoding: set by lavc\
* - decoding: set by lavc\
*/\
int key_frame;\
\
/**\
* picture type of the frame, see ?_TYPE below.\
* - encoding: set by lavc for coded_picture (and set by user for input)\
* - decoding: set by lavc\
*/\
int pict_type;\
\
/**\
* presentation timestamp in time_base units (time when frame should be shown to user)\
* if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
* - encoding: MUST be set by user\
* - decoding: set by lavc\
*/\
int64_t pts;\
\
/**\
* picture number in bitstream order.\
* - encoding: set by\
* - decoding: set by lavc\
*/\
int coded_picture_number;\
/**\
* picture number in display order.\
* - encoding: set by\
* - decoding: set by lavc\
*/\
int display_picture_number;\
\
/**\
* quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
* - encoding: set by lavc for coded_picture (and set by user for input)\
* - decoding: set by lavc\
*/\
int quality; \
\
/**\
* buffer age (1->was last buffer and dint change, 2->..., ...).\
* set to INT_MAX if the buffer has not been used yet \
* - encoding: unused\
* - decoding: MUST be set by get_buffer()\
*/\
int age;\
\
/**\
* is this picture used as reference\
* - encoding: unused\
* - decoding: set by lavc (before get_buffer() call))\
*/\
int reference;\
\
/**\
* QP table\
* - encoding: unused\
* - decoding: set by lavc\
*/\
int8_t *qscale_table;\
/**\
* QP store stride\
* - encoding: unused\
* - decoding: set by lavc\
*/\
int qstride;\
\
/**\
* mbskip_table[mb]>=1 if MB didnt change\
* stride= mb_width = (width+15)>>4\
* - encoding: unused\
* - decoding: set by lavc\
*/\
uint8_t *mbskip_table;\
\
/**\
* Motion vector table.\
* @code\
* example:\
* int mv_sample_log2= 4 - motion_subsample_log2;\
* int mb_width= (width+15)>>4;\
* int mv_stride= (mb_width << mv_sample_log2) + 1;\
* motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
* @endcode\
* - encoding: set by user\
* - decoding: set by lavc\
*/\
int16_t (*motion_val[2])[2];\
\
/**\
* Macroblock type table\
* mb_type_base + mb_width + 2\
* - encoding: set by user\
* - decoding: set by lavc\
*/\
uint32_t *mb_type;\
\
/**\
* log2 of the size of the block which a single vector in motion_val represents: \
* (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
* - encoding: unused\
* - decoding: set by lavc\
*/\
uint8_t motion_subsample_log2;\
\
/**\
* for some private data of the user\
* - encoding: unused\
* - decoding: set by user\
*/\
void *opaque;\
\
/**\
* error\
* - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
* - decoding: unused\
*/\
uint64_t error[4];\
\
/**\
* type of the buffer (to keep track of who has to dealloc data[*])\
* - encoding: set by the one who allocs it\
* - decoding: set by the one who allocs it\
* Note: user allocated (direct rendering) & internal buffers can not coexist currently\
*/\
int type;\
\
/**\
* when decoding, this signal how much the picture must be delayed.\
* extra_delay = repeat_pict / (2*fps)\
* - encoding: unused\
* - decoding: set by lavc\
*/\
int repeat_pict;\
\
/**\
* \
*/\
int qscale_type;\
\
/**\
* The content of the picture is interlaced.\
* - encoding: set by user\
* - decoding: set by lavc (default 0)\
*/\
int interlaced_frame;\
\
/**\
* if the content is interlaced, is top field displayed first.\
* - encoding: set by user\
* - decoding: set by lavc\
*/\
int top_field_first;\
\
/**\
* Pan scan.\
* - encoding: set by user\
* - decoding: set by lavc\
*/\
AVPanScan *pan_scan;\
\
/**\
* tell user application that palette has changed from previous frame.\
* - encoding: ??? (no palette-enabled encoder yet)\
* - decoding: set by lavc (default 0)\
*/\
int palette_has_changed;\
\
/**\
* Codec suggestion on buffer type if != 0\
* - encoding: unused\
* - decoding: set by lavc (before get_buffer() call))\
*/\
int buffer_hints;\
\
/**\
* DCT coeffitients\
* - encoding: unused\
* - decoding: set by lavc\
*/\
short *dct_coeff;\
\
/**\
* Motion referece frame index\
* - encoding: set by user\
* - decoding: set by lavc\
*/\
int8_t *ref_index[2];
#define FF_QSCALE_TYPE_MPEG1 0
#define FF_QSCALE_TYPE_MPEG2 1
#define FF_QSCALE_TYPE_H264 2
#define FF_BUFFER_TYPE_INTERNAL 1
#define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
#define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
#define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
#define FF_I_TYPE 1 // Intra
#define FF_P_TYPE 2 // Predicted
#define FF_B_TYPE 3 // Bi-dir predicted
#define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
#define FF_SI_TYPE 5
#define FF_SP_TYPE 6
#define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
#define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
#define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
#define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
/**
* Audio Video Frame.
*/
typedef struct AVFrame {
FF_COMMON_FRAME
} AVFrame;
#define DEFAULT_FRAME_RATE_BASE 1001000
/**
* main external api structure.
*/
typedef struct AVCodecContext {
/**
* Info on struct for av_log
* - set by avcodec_alloc_context
*/
AVClass *av_class;
/**
* the average bitrate.
* - encoding: set by user. unused for constant quantizer encoding
* - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
*/
int bit_rate;
/**
* number of bits the bitstream is allowed to diverge from the reference.
* the reference can be CBR (for CBR pass1) or VBR (for pass2)
* - encoding: set by user. unused for constant quantizer encoding
* - decoding: unused
*/
int bit_rate_tolerance;
/**
* CODEC_FLAG_*.
* - encoding: set by user.
* - decoding: set by user.
*/
int flags;
/**
* some codecs needs additionnal format info. It is stored here
* - encoding: set by user.
* - decoding: set by lavc. (FIXME is this ok?)
*/
int sub_id;
/**
* motion estimation algorithm used for video coding.
* 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
* 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
* - encoding: MUST be set by user.
* - decoding: unused
*/
int me_method;
/**
* some codecs need / can use extra-data like huffman tables.
* mjpeg: huffman tables
* rv10: additional flags
* mpeg4: global headers (they can be in the bitstream or here)
* the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
* then extradata_size to avoid prolems if its read with the bitstream reader
* the bytewise contents of extradata must not depend on the architecture or cpu endianness
* - encoding: set/allocated/freed by lavc.
* - decoding: set/allocated/freed by user.
*/
uint8_t *extradata;
int extradata_size;
/**
* this is the fundamental unit of time (in seconds) in terms
* of which frame timestamps are represented. for fixed-fps content,
* timebase should be 1/framerate and timestamp increments should be
* identically 1.
* - encoding: MUST be set by user
* - decoding: set by lavc.
*/
AVRational time_base;
/* video only */
/**
* picture width / height.
* - encoding: MUST be set by user.
* - decoding: set by lavc.
* Note, for compatibility its possible to set this instead of
* coded_width/height before decoding
*/
int width, height;
#define FF_ASPECT_EXTENDED 15
/**
* the number of pictures in a group of pitures, or 0 for intra_only.
* - encoding: set by user.
* - decoding: unused
*/
int gop_size;
/**
* pixel format, see PIX_FMT_xxx.
* - encoding: set by user.
* - decoding: set by lavc.
*/
enum PixelFormat pix_fmt;
/**
* Frame rate emulation. If not zero lower layer (i.e. format handler)
* has to read frames at native frame rate.
* - encoding: set by user.
* - decoding: unused.
*/
int rate_emu;
/**
* if non NULL, 'draw_horiz_band' is called by the libavcodec
* decoder to draw an horizontal band. It improve cache usage. Not
* all codecs can do that. You must check the codec capabilities
* before
* - encoding: unused
* - decoding: set by user.
* @param height the height of the slice
* @param y the y position of the slice
* @param type 1->top field, 2->bottom field, 3->frame
* @param offset offset into the AVFrame.data from which the slice should be read
*/
void (*draw_horiz_band)(struct AVCodecContext *s,
const AVFrame *src, int offset[4],
int y, int type, int height);
/* audio only */
int sample_rate; ///< samples per sec
int channels;
/**
* audio sample format.
* - encoding: set by user.
* - decoding: set by lavc.
*/
enum SampleFormat sample_fmt; ///< sample format, currenly unused
/* the following data should not be initialized */
/**
* samples per packet. initialized when calling 'init'
*/
int frame_size;
int frame_number; ///< audio or video frame number
int real_pict_num; ///< returns the real picture number of previous encoded frame
/**
* number of frames the decoded output will be delayed relative to
* the encoded input.
* - encoding: set by lavc.
* - decoding: unused
*/
int delay;
/* - encoding parameters */
float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
/**
* minimum quantizer.
* - encoding: set by user.
* - decoding: unused
*/
int qmin;
/**
* maximum quantizer.
* - encoding: set by user.
* - decoding: unused
*/
int qmax;
/**
* maximum quantizer difference etween frames.
* - encoding: set by user.
* - decoding: unused
*/
int max_qdiff;
/**
* maximum number of b frames between non b frames.
* note: the output will be delayed by max_b_frames+1 relative to the input
* - encoding: set by user.
* - decoding: unused
*/
int max_b_frames;
/**
* qscale factor between ip and b frames.
* - encoding: set by user.
* - decoding: unused
*/
float b_quant_factor;
/** obsolete FIXME remove */
int rc_strategy;
#define FF_RC_STRATEGY_XVID 1
int b_frame_strategy;
/**
* hurry up amount.
* deprecated in favor of skip_idct and skip_frame
* - encoding: unused
* - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
*/
int hurry_up;
struct AVCodec *codec;
void *priv_data;
/* unused, FIXME remove*/
int rtp_mode;
int rtp_payload_size; /* The size of the RTP payload: the coder will */
/* do it's best to deliver a chunk with size */
/* below rtp_payload_size, the chunk will start */
/* with a start code on some codecs like H.263 */
/* This doesn't take account of any particular */
/* headers inside the transmited RTP payload */
/* The RTP callback: This function is called */
/* every time the encoder has a packet to send */
/* Depends on the encoder if the data starts */
/* with a Start Code (it should) H.263 does. */
/* mb_nb contains the number of macroblocks */
/* encoded in the RTP payload */
void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
/* statistics, used for 2-pass encoding */
int mv_bits;
int header_bits;
int i_tex_bits;
int p_tex_bits;
int i_count;
int p_count;
int skip_count;
int misc_bits;
/**
* number of bits used for the previously encoded frame.
* - encoding: set by lavc
* - decoding: unused
*/
int frame_bits;
/**
* private data of the user, can be used to carry app specific stuff.
* - encoding: set by user
* - decoding: set by user
*/
void *opaque;
char codec_name[32];
enum CodecType codec_type; /* see CODEC_TYPE_xxx */
enum CodecID codec_id; /* see CODEC_ID_xxx */
/**
* fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
* this is used to workaround some encoder bugs
* - encoding: set by user, if not then the default based on codec_id will be used
* - decoding: set by user, will be converted to upper case by lavc during init
*/
unsigned int codec_tag;
/**
* workaround bugs in encoders which sometimes cannot be detected automatically.
* - encoding: set by user
* - decoding: set by user
*/
int workaround_bugs;
#define FF_BUG_AUTODETECT 1 ///< autodetection
#define FF_BUG_OLD_MSMPEG4 2
#define FF_BUG_XVID_ILACE 4
#define FF_BUG_UMP4 8
#define FF_BUG_NO_PADDING 16
#define FF_BUG_AMV 32
#define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
#define FF_BUG_QPEL_CHROMA 64
#define FF_BUG_STD_QPEL 128
#define FF_BUG_QPEL_CHROMA2 256
#define FF_BUG_DIRECT_BLOCKSIZE 512
#define FF_BUG_EDGE 1024
#define FF_BUG_HPEL_CHROMA 2048
#define FF_BUG_DC_CLIP 4096
#define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
//#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
/**
* luma single coeff elimination threshold.
* - encoding: set by user
* - decoding: unused
*/
int luma_elim_threshold;
/**
* chroma single coeff elimination threshold.
* - encoding: set by user
* - decoding: unused
*/
int chroma_elim_threshold;
/**
* strictly follow the std (MPEG4, ...).
* - encoding: set by user
* - decoding: unused
*/
int strict_std_compliance;
#define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
#define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
#define FF_COMPLIANCE_NORMAL 0
#define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
/**
* qscale offset between ip and b frames.
* if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
* if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
* - encoding: set by user.
* - decoding: unused
*/
float b_quant_offset;
/**
* error resilience higher values will detect more errors but may missdetect
* some more or less valid parts as errors.
* - encoding: unused
* - decoding: set by user
*/
int error_resilience;
#define FF_ER_CAREFUL 1
#define FF_ER_COMPLIANT 2
#define FF_ER_AGGRESSIVE 3
#define FF_ER_VERY_AGGRESSIVE 4
/**
* called at the beginning of each frame to get a buffer for it.
* if pic.reference is set then the frame will be read later by lavc
* avcodec_align_dimensions() should be used to find the required width and
* height, as they normally need to be rounded up to the next multiple of 16
* - encoding: unused
* - decoding: set by lavc, user can override
*/
int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
/**
* called to release buffers which where allocated with get_buffer.
* a released buffer can be reused in get_buffer()
* pic.data[*] must be set to NULL
* - encoding: unused
* - decoding: set by lavc, user can override
*/
void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
/**
* if 1 the stream has a 1 frame delay during decoding.
* - encoding: set by lavc
* - decoding: set by lavc
*/
int has_b_frames;
/**
* number of bytes per packet if constant and known or 0
* used by some WAV based audio codecs
*/
int block_align;
int parse_only; /* - decoding only: if true, only parsing is done
(function avcodec_parse_frame()). The frame
data is returned. Only MPEG codecs support this now. */
/**
* 0-> h263 quant 1-> mpeg quant.
* - encoding: set by user.
* - decoding: unused
*/
int mpeg_quant;
/**
* pass1 encoding statistics output buffer.
* - encoding: set by lavc
* - decoding: unused
*/
char *stats_out;
/**
* pass2 encoding statistics input buffer.
* concatenated stuff from stats_out of pass1 should be placed here
* - encoding: allocated/set/freed by user
* - decoding: unused
*/
char *stats_in;
/**
* ratecontrol qmin qmax limiting method.
* 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
* - encoding: set by user.
* - decoding: unused
*/
float rc_qsquish;
float rc_qmod_amp;
int rc_qmod_freq;
/**
* ratecontrol override, see RcOverride.
* - encoding: allocated/set/freed by user.
* - decoding: unused
*/
RcOverride *rc_override;
int rc_override_count;
/**
* rate control equation.
* - encoding: set by user
* - decoding: unused
*/
char *rc_eq;
/**
* maximum bitrate.
* - encoding: set by user.
* - decoding: unused
*/
int rc_max_rate;
/**
* minimum bitrate.
* - encoding: set by user.
* - decoding: unused
*/
int rc_min_rate;
/**
* decoder bitstream buffer size.
* - encoding: set by user.
* - decoding: unused
*/
int rc_buffer_size;
float rc_buffer_aggressivity;
/**
* qscale factor between p and i frames.
* if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
* if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
* - encoding: set by user.
* - decoding: unused
*/
float i_quant_factor;
/**
* qscale offset between p and i frames.
* - encoding: set by user.
* - decoding: unused
*/
float i_quant_offset;
/**
* initial complexity for pass1 ratecontrol.
* - encoding: set by user.
* - decoding: unused
*/
float rc_initial_cplx;
/**
* dct algorithm, see FF_DCT_* below.
* - encoding: set by user
* - decoding: unused
*/
int dct_algo;
#define FF_DCT_AUTO 0
#define FF_DCT_FASTINT 1
#define FF_DCT_INT 2
#define FF_DCT_MMX 3
#define FF_DCT_MLIB 4
#define FF_DCT_ALTIVEC 5
#define FF_DCT_FAAN 6
/**
* luminance masking (0-> disabled).
* - encoding: set by user
* - decoding: unused
*/
float lumi_masking;
/**
* temporary complexity masking (0-> disabled).
* - encoding: set by user
* - decoding: unused
*/
float temporal_cplx_masking;
/**
* spatial complexity masking (0-> disabled).
* - encoding: set by user
* - decoding: unused
*/
float spatial_cplx_masking;
/**
* p block masking (0-> disabled).
* - encoding: set by user
* - decoding: unused
*/
float p_masking;
/**
* darkness masking (0-> disabled).
* - encoding: set by user
* - decoding: unused
*/
float dark_masking;
/* for binary compatibility */
int unused;
/**
* idct algorithm, see FF_IDCT_* below.
* - encoding: set by user
* - decoding: set by user
*/
int idct_algo;
#define FF_IDCT_AUTO 0
#define FF_IDCT_INT 1
#define FF_IDCT_SIMPLE 2
#define FF_IDCT_SIMPLEMMX 3
#define FF_IDCT_LIBMPEG2MMX 4
#define FF_IDCT_PS2 5
#define FF_IDCT_MLIB 6
#define FF_IDCT_ARM 7
#define FF_IDCT_ALTIVEC 8
#define FF_IDCT_SH4 9
#define FF_IDCT_SIMPLEARM 10
#define FF_IDCT_H264 11
#define FF_IDCT_VP3 12
#define FF_IDCT_IPP 13
#define FF_IDCT_XVIDMMX 14
#define FF_IDCT_CAVS 15
#define FF_IDCT_SIMPLEARMV5TE 16
/**
* slice count.
* - encoding: set by lavc
* - decoding: set by user (or 0)
*/
int slice_count;
/**
* slice offsets in the frame in bytes.
* - encoding: set/allocated by lavc
* - decoding: set/allocated by user (or NULL)
*/
int *slice_offset;
/**
* error concealment flags.
* - encoding: unused
* - decoding: set by user
*/
int error_concealment;
#define FF_EC_GUESS_MVS 1
#define FF_EC_DEBLOCK 2
/**
* dsp_mask could be add used to disable unwanted CPU features
* CPU features (i.e. MMX, SSE. ...)
*
* with FORCE flag you may instead enable given CPU features
* (Dangerous: usable in case of misdetection, improper usage however will
* result into program crash)
*/
unsigned dsp_mask;
#define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
/* lower 16 bits - CPU features */
#ifdef HAVE_MMX
#define FF_MM_MMX 0x0001 /* standard MMX */
#define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
#define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
#define FF_MM_SSE 0x0008 /* SSE functions */
#define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
#define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
#endif /* HAVE_MMX */
#ifdef HAVE_IWMMXT
#define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
#endif /* HAVE_IWMMXT */
/**
* bits per sample/pixel from the demuxer (needed for huffyuv).
* - encoding: set by lavc
* - decoding: set by user
*/
int bits_per_sample;
/**
* prediction method (needed for huffyuv).
* - encoding: set by user
* - decoding: unused
*/
int prediction_method;
#define FF_PRED_LEFT 0
#define FF_PRED_PLANE 1
#define FF_PRED_MEDIAN 2
/**
* sample aspect ratio (0 if unknown).
* numerator and denominator must be relative prime and smaller then 256 for some video standards
* - encoding: set by user.
* - decoding: set by lavc.
*/
AVRational sample_aspect_ratio;
/**
* the picture in the bitstream.
* - encoding: set by lavc
* - decoding: set by lavc
*/
AVFrame *coded_frame;
/**
* debug.
* - encoding: set by user.
* - decoding: set by user.
*/
int debug;
#define FF_DEBUG_PICT_INFO 1
#define FF_DEBUG_RC 2
#define FF_DEBUG_BITSTREAM 4
#define FF_DEBUG_MB_TYPE 8
#define FF_DEBUG_QP 16
#define FF_DEBUG_MV 32
#define FF_DEBUG_DCT_COEFF 0x00000040
#define FF_DEBUG_SKIP 0x00000080
#define FF_DEBUG_STARTCODE 0x00000100
#define FF_DEBUG_PTS 0x00000200
#define FF_DEBUG_ER 0x00000400
#define FF_DEBUG_MMCO 0x00000800
#define FF_DEBUG_BUGS 0x00001000
#define FF_DEBUG_VIS_QP 0x00002000
#define FF_DEBUG_VIS_MB_TYPE 0x00004000
/**
* debug.
* - encoding: set by user.
* - decoding: set by user.
*/
int debug_mv;
#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
/**
* error.
* - encoding: set by lavc if flags&CODEC_FLAG_PSNR
* - decoding: unused
*/
uint64_t error[4];
/**
* minimum MB quantizer.
* - encoding: unused
* - decoding: unused
*/
int mb_qmin;
/**
* maximum MB quantizer.
* - encoding: unused
* - decoding: unused
*/
int mb_qmax;
/**
* motion estimation compare function.
* - encoding: set by user.
* - decoding: unused
*/
int me_cmp;
/**
* subpixel motion estimation compare function.
* - encoding: set by user.
* - decoding: unused
*/
int me_sub_cmp;
/**
* macroblock compare function (not supported yet).
* - encoding: set by user.
* - decoding: unused
*/
int mb_cmp;
/**
* interlaced dct compare function
* - encoding: set by user.
* - decoding: unused
*/
int ildct_cmp;
#define FF_CMP_SAD 0
#define FF_CMP_SSE 1
#define FF_CMP_SATD 2
#define FF_CMP_DCT 3
#define FF_CMP_PSNR 4
#define FF_CMP_BIT 5
#define FF_CMP_RD 6
#define FF_CMP_ZERO 7
#define FF_CMP_VSAD 8
#define FF_CMP_VSSE 9
#define FF_CMP_NSSE 10
#define FF_CMP_W53 11
#define FF_CMP_W97 12
#define FF_CMP_DCTMAX 13
#define FF_CMP_DCT264 14
#define FF_CMP_CHROMA 256
/**
* ME diamond size & shape.
* - encoding: set by user.
* - decoding: unused
*/
int dia_size;
/**
* amount of previous MV predictors (2a+1 x 2a+1 square).
* - encoding: set by user.
* - decoding: unused
*/
int last_predictor_count;
/**
* pre pass for motion estimation.
* - encoding: set by user.
* - decoding: unused
*/
int pre_me;
/**
* motion estimation pre pass compare function.
* - encoding: set by user.
* - decoding: unused
*/
int me_pre_cmp;
/**
* ME pre pass diamond size & shape.
* - encoding: set by user.
* - decoding: unused
*/
int pre_dia_size;
/**
* subpel ME quality.
* - encoding: set by user.
* - decoding: unused
*/
int me_subpel_quality;
/**
* callback to negotiate the pixelFormat.
* @param fmt is the list of formats which are supported by the codec,
* its terminated by -1 as 0 is a valid format, the formats are ordered by quality
* the first is allways the native one
* @return the choosen format
* - encoding: unused
* - decoding: set by user, if not set then the native format will always be choosen
*/
enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
/**
* DTG active format information (additionnal aspect ratio
* information only used in DVB MPEG2 transport streams). 0 if
* not set.
*
* - encoding: unused.
* - decoding: set by decoder
*/
int dtg_active_format;
#define FF_DTG_AFD_SAME 8
#define FF_DTG_AFD_4_3 9
#define FF_DTG_AFD_16_9 10
#define FF_DTG_AFD_14_9 11
#define FF_DTG_AFD_4_3_SP_14_9 13
#define FF_DTG_AFD_16_9_SP_14_9 14
#define FF_DTG_AFD_SP_4_3 15
/**
* Maximum motion estimation search range in subpel units.
* if 0 then no limit
*
* - encoding: set by user.
* - decoding: unused.
*/
int me_range;
/**
* intra quantizer bias.
* - encoding: set by user.
* - decoding: unused
*/
int intra_quant_bias;
#define FF_DEFAULT_QUANT_BIAS 999999
/**
* inter quantizer bias.
* - encoding: set by user.
* - decoding: unused
*/
int inter_quant_bias;
/**
* color table ID.
* - encoding: unused.
* - decoding: which clrtable should be used for 8bit RGB images
* table have to be stored somewhere FIXME
*/
int color_table_id;
/**
* internal_buffer count.
* Don't touch, used by lavc default_get_buffer()
*/
int internal_buffer_count;
/**
* internal_buffers.
* Don't touch, used by lavc default_get_buffer()
*/
void *internal_buffer;
#define FF_LAMBDA_SHIFT 7
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
#define FF_LAMBDA_MAX (256*128-1)
#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
/**
* global quality for codecs which cannot change it per frame.
* this should be proportional to MPEG1/2/4 qscale.
* - encoding: set by user.
* - decoding: unused
*/
int global_quality;
#define FF_CODER_TYPE_VLC 0
#define FF_CODER_TYPE_AC 1
/**
* coder type
* - encoding: set by user.
* - decoding: unused
*/
int coder_type;
/**
* context model
* - encoding: set by user.
* - decoding: unused
*/
int context_model;
#if 0
/**
*
* - encoding: unused
* - decoding: set by user.
*/
uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
#endif
/**
* slice flags
* - encoding: unused
* - decoding: set by user.
*/
int slice_flags;
#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
/**
* XVideo Motion Acceleration
* - encoding: forbidden
* - decoding: set by decoder
*/
int xvmc_acceleration;
/**
* macroblock decision mode
* - encoding: set by user.
* - decoding: unused
*/
int mb_decision;
#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
#define FF_MB_DECISION_RD 2 ///< rate distoration
/**
* custom intra quantization matrix
* - encoding: set by user, can be NULL
* - decoding: set by lavc
*/
uint16_t *intra_matrix;
/**
* custom inter quantization matrix
* - encoding: set by user, can be NULL
* - decoding: set by lavc
*/
uint16_t *inter_matrix;
/**
* fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
* this is used to workaround some encoder bugs
* - encoding: unused
* - decoding: set by user, will be converted to upper case by lavc during init
*/
unsigned int stream_codec_tag;
/**
* scene change detection threshold.
* 0 is default, larger means fewer detected scene changes
* - encoding: set by user.
* - decoding: unused
*/
int scenechange_threshold;
/**
* minimum lagrange multipler
* - encoding: set by user.
* - decoding: unused
*/
int lmin;
/**
* maximum lagrange multipler
* - encoding: set by user.
* - decoding: unused
*/
int lmax;
/**
* Palette control structure
* - encoding: ??? (no palette-enabled encoder yet)
* - decoding: set by user.
*/
struct AVPaletteControl *palctrl;
/**
* noise reduction strength
* - encoding: set by user.
* - decoding: unused
*/
int noise_reduction;
/**
* called at the beginning of a frame to get cr buffer for it.
* buffer type (size, hints) must be the same. lavc won't check it.
* lavc will pass previous buffer in pic, function should return
* same buffer or new buffer with old frame "painted" into it.
* if pic.data[0] == NULL must behave like get_buffer().
* - encoding: unused
* - decoding: set by lavc, user can override
*/
int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
/**
* number of bits which should be loaded into the rc buffer before decoding starts
* - encoding: set by user.
* - decoding: unused
*/
int rc_initial_buffer_occupancy;
/**
*
* - encoding: set by user.
* - decoding: unused
*/
int inter_threshold;
/**
* CODEC_FLAG2_*.
* - encoding: set by user.
* - decoding: set by user.
*/
int flags2;
/**
* simulates errors in the bitstream to test error concealment.
* - encoding: set by user.
* - decoding: unused.
*/
int error_rate;
/**
* MP3 antialias algorithm, see FF_AA_* below.
* - encoding: unused
* - decoding: set by user
*/
int antialias_algo;
#define FF_AA_AUTO 0
#define FF_AA_FASTINT 1 //not implemented yet
#define FF_AA_INT 2
#define FF_AA_FLOAT 3
/**
* Quantizer noise shaping.
* - encoding: set by user
* - decoding: unused
*/
int quantizer_noise_shaping;
/**
* Thread count.
* is used to decide how many independant tasks should be passed to execute()
* - encoding: set by user
* - decoding: set by user
*/
int thread_count;
/**
* the codec may call this to execute several independant things. it will return only after
* finishing all tasks, the user may replace this with some multithreaded implementation, the
* default implementation will execute the parts serially
* @param count the number of things to execute
* - encoding: set by lavc, user can override
* - decoding: set by lavc, user can override
*/
int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
/**
* Thread opaque.
* can be used by execute() to store some per AVCodecContext stuff.
* - encoding: set by execute()
* - decoding: set by execute()
*/
void *thread_opaque;
/**
* Motion estimation threshold. under which no motion estimation is
* performed, but instead the user specified motion vectors are used
*
* - encoding: set by user
* - decoding: unused
*/
int me_threshold;
/**
* Macroblock threshold. under which the user specified macroblock types will be used
* - encoding: set by user
* - decoding: unused
*/
int mb_threshold;
/**
* precision of the intra dc coefficient - 8.
* - encoding: set by user
* - decoding: unused
*/
int intra_dc_precision;
/**
* noise vs. sse weight for the nsse comparsion function.
* - encoding: set by user
* - decoding: unused
*/
int nsse_weight;
/**
* number of macroblock rows at the top which are skipped.
* - encoding: unused
* - decoding: set by user
*/
int skip_top;
/**
* number of macroblock rows at the bottom which are skipped.
* - encoding: unused
* - decoding: set by user
*/
int skip_bottom;
/**
* profile
* - encoding: set by user
* - decoding: set by lavc
*/
int profile;
#define FF_PROFILE_UNKNOWN -99
/**
* level
* - encoding: set by user
* - decoding: set by lavc
*/
int level;
#define FF_LEVEL_UNKNOWN -99
/**
* low resolution decoding. 1-> 1/2 size, 2->1/4 size
* - encoding: unused
* - decoding: set by user
*/
int lowres;
/**
* bitsream width / height. may be different from width/height if lowres
* or other things are used
* - encoding: unused
* - decoding: set by user before init if known, codec should override / dynamically change if needed
*/
int coded_width, coded_height;
/**
* frame skip threshold
* - encoding: set by user
* - decoding: unused
*/
int frame_skip_threshold;
/**
* frame skip factor
* - encoding: set by user
* - decoding: unused
*/
int frame_skip_factor;
/**
* frame skip exponent
* - encoding: set by user
* - decoding: unused
*/
int frame_skip_exp;
/**
* frame skip comparission function
* - encoding: set by user.
* - decoding: unused
*/
int frame_skip_cmp;
/**
* border processing masking. raises the quantizer for mbs on the borders
* of the picture.
* - encoding: set by user
* - decoding: unused
*/
float border_masking;
/**
* minimum MB lagrange multipler.
* - encoding: set by user.
* - decoding: unused
*/
int mb_lmin;
/**
* maximum MB lagrange multipler.
* - encoding: set by user.
* - decoding: unused
*/
int mb_lmax;
/**
*
* - encoding: set by user.
* - decoding: unused
*/
int me_penalty_compensation;
/**
*
* - encoding: unused
* - decoding: set by user.
*/
enum AVDiscard skip_loop_filter;
/**
*
* - encoding: unused
* - decoding: set by user.
*/
enum AVDiscard skip_idct;
/**
*
* - encoding: unused
* - decoding: set by user.
*/
enum AVDiscard skip_frame;
/**
*
* - encoding: set by user.
* - decoding: unused
*/
int bidir_refine;
/**
*
* - encoding: set by user.
* - decoding: unused
*/
int brd_scale;
/**
* constant rate factor - quality-based VBR - values ~correspond to qps
* - encoding: set by user.
* - decoding: unused
*/
float crf;
/**
* constant quantization parameter rate control method
* - encoding: set by user.
* - decoding: unused
*/
int cqp;
/**
* minimum gop size
* - encoding: set by user.
* - decoding: unused
*/
int keyint_min;
/**
* number of reference frames
* - encoding: set by user.
* - decoding: unused
*/
int refs;
/**
* chroma qp offset from luma
* - encoding: set by user.
* - decoding: unused
*/
int chromaoffset;
/**
* influences how often b-frames are used
* - encoding: set by user.
* - decoding: unused
*/
int bframebias;
/**
* trellis RD quantization
* - encoding: set by user.
* - decoding: unused
*/
int trellis;
/**
* reduce fluctuations in qp (before curve compression)
* - encoding: set by user.
* - decoding: unused
*/
float complexityblur;
/**
* in-loop deblocking filter alphac0 parameter
* alpha is in the range -6...6
* - encoding: set by user.
* - decoding: unused
*/
int deblockalpha;
/**
* in-loop deblocking filter beta parameter
* beta is in the range -6...6
* - encoding: set by user.
* - decoding: unused
*/
int deblockbeta;
/**
* macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
* - encoding: set by user.
* - decoding: unused
*/
int partitions;
#define X264_PART_I4X4 0x001 /* Analyse i4x4 */
#define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
#define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
#define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
#define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
/**
* direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
* - encoding: set by user.
* - decoding: unused
*/
int directpred;
/**
* audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
* - encoding: set by user.
* - decoding: unused
*/
int cutoff;
/**
* multiplied by qscale for each frame and added to scene_change_score
* - encoding: set by user.
* - decoding: unused
*/
int scenechange_factor;
/**
*
* note: value depends upon the compare functin used for fullpel ME
* - encoding: set by user.
* - decoding: unused
*/
int mv0_threshold;
/**
* adjusts sensitivity of b_frame_strategy 1
* - encoding: set by user.
* - decoding: unused
*/
int b_sensitivity;
/**
* - encoding: set by user.
* - decoding: unused
*/
int compression_level;
#define FF_COMPRESSION_DEFAULT -1
/**
* sets whether to use LPC mode - used by FLAC encoder
* - encoding: set by user.
* - decoding: unused.
*/
int use_lpc;
/**
* LPC coefficient precision - used by FLAC encoder
* - encoding: set by user.
* - decoding: unused.
*/
int lpc_coeff_precision;
/**
* - encoding: set by user.
* - decoding: unused.
*/
int min_prediction_order;
/**
* - encoding: set by user.
* - decoding: unused.
*/
int max_prediction_order;
/**
* search method for selecting prediction order
* - encoding: set by user.
* - decoding: unused.
*/
int prediction_order_method;
/**
* - encoding: set by user.
* - decoding: unused.
*/
int min_partition_order;
/**
* - encoding: set by user.
* - decoding: unused.
*/
int max_partition_order;
/**
* GOP timecode frame start number, in non drop frame format
* - encoding: set by user.
* - decoding: unused.
*/
int64_t timecode_frame_start;
} AVCodecContext;
/**
* AVCodec.
*/
typedef struct AVCodec {
const char *name;
enum CodecType type;
enum CodecID id;
int priv_data_size;
int (*init)(AVCodecContext *);
int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
int (*close)(AVCodecContext *);
int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
uint8_t *buf, int buf_size);
int capabilities;
#if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
void *dummy; // FIXME remove next time we break binary compatibility
#endif
struct AVCodec *next;
void (*flush)(AVCodecContext *);
const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
} AVCodec;
/**
* four components are given, that's all.
* the last component is alpha
*/
typedef struct AVPicture {
uint8_t *data[4];
int linesize[4]; ///< number of bytes per line
} AVPicture;
/**
* AVPaletteControl
* This structure defines a method for communicating palette changes
* between and demuxer and a decoder.
* this is totally broken, palette changes should be sent as AVPackets
*/
#define AVPALETTE_SIZE 1024
#define AVPALETTE_COUNT 256
typedef struct AVPaletteControl {
/* demuxer sets this to 1 to indicate the palette has changed;
* decoder resets to 0 */
int palette_changed;
/* 4-byte ARGB palette entries, stored in native byte order; note that
* the individual palette components should be on a 8-bit scale; if
* the palette data comes from a IBM VGA native format, the component
* data is probably 6 bits in size and needs to be scaled */
unsigned int palette[AVPALETTE_COUNT];
} AVPaletteControl attribute_deprecated;
typedef struct AVSubtitleRect {
uint16_t x;
uint16_t y;
uint16_t w;
uint16_t h;
uint16_t nb_colors;
int linesize;
uint32_t *rgba_palette;
uint8_t *bitmap;
} AVSubtitleRect;
typedef struct AVSubtitle {
uint16_t format; /* 0 = graphics */
uint32_t start_display_time; /* relative to packet pts, in ms */
uint32_t end_display_time; /* relative to packet pts, in ms */
uint32_t num_rects;
AVSubtitleRect *rects;
} AVSubtitle;
extern AVCodec ac3_encoder;
extern AVCodec mp2_encoder;
extern AVCodec mp3lame_encoder;
extern AVCodec oggvorbis_encoder;
extern AVCodec faac_encoder;
extern AVCodec flac_encoder;
extern AVCodec gif_encoder;
extern AVCodec xvid_encoder;
extern AVCodec mpeg1video_encoder;
extern AVCodec mpeg2video_encoder;
extern AVCodec h261_encoder;
extern AVCodec h263_encoder;
extern AVCodec h263p_encoder;
extern AVCodec flv_encoder;
extern AVCodec rv10_encoder;
extern AVCodec rv20_encoder;
extern AVCodec dvvideo_encoder;
extern AVCodec mjpeg_encoder;
extern AVCodec ljpeg_encoder;
extern AVCodec jpegls_encoder;
extern AVCodec png_encoder;
extern AVCodec ppm_encoder;
extern AVCodec pgm_encoder;
extern AVCodec pgmyuv_encoder;
extern AVCodec pbm_encoder;
extern AVCodec pam_encoder;
extern AVCodec mpeg4_encoder;
extern AVCodec msmpeg4v1_encoder;
extern AVCodec msmpeg4v2_encoder;
extern AVCodec msmpeg4v3_encoder;
extern AVCodec wmv1_encoder;
extern AVCodec wmv2_encoder;
extern AVCodec huffyuv_encoder;
extern AVCodec ffvhuff_encoder;
extern AVCodec h264_encoder;
extern AVCodec asv1_encoder;
extern AVCodec asv2_encoder;
extern AVCodec vcr1_encoder;
extern AVCodec ffv1_encoder;
extern AVCodec snow_encoder;
extern AVCodec vorbis_encoder;
extern AVCodec mdec_encoder;
extern AVCodec zlib_encoder;
extern AVCodec sonic_encoder;
extern AVCodec sonic_ls_encoder;
extern AVCodec svq1_encoder;
extern AVCodec x264_encoder;
extern AVCodec gif_decoder;
extern AVCodec h263_decoder;
extern AVCodec h261_decoder;
extern AVCodec mpeg4_decoder;
extern AVCodec msmpeg4v1_decoder;
extern AVCodec msmpeg4v2_decoder;
extern AVCodec msmpeg4v3_decoder;
extern AVCodec wmv1_decoder;
extern AVCodec wmv2_decoder;
extern AVCodec vc1_decoder;
extern AVCodec wmv3_decoder;
extern AVCodec mpeg1video_decoder;
extern AVCodec mpeg2video_decoder;
extern AVCodec mpegvideo_decoder;
extern AVCodec mpeg_xvmc_decoder;
extern AVCodec h263i_decoder;
extern AVCodec flv_decoder;
extern AVCodec rv10_decoder;
extern AVCodec rv20_decoder;
extern AVCodec rv30_decoder;
extern AVCodec rv40_decoder;
extern AVCodec svq1_decoder;
extern AVCodec svq3_decoder;
extern AVCodec dvvideo_decoder;
extern AVCodec wmav1_decoder;
extern AVCodec wmav2_decoder;
extern AVCodec mjpeg_decoder;
extern AVCodec mjpegb_decoder;
extern AVCodec sp5x_decoder;
extern AVCodec png_decoder;
extern AVCodec mp2_decoder;
extern AVCodec mp3_decoder;
extern AVCodec mp3adu_decoder;
extern AVCodec mp3on4_decoder;
extern AVCodec qdm2_decoder;
extern AVCodec cook_decoder;
extern AVCodec truespeech_decoder;
extern AVCodec tta_decoder;
extern AVCodec mace3_decoder;
extern AVCodec mace6_decoder;
extern AVCodec huffyuv_decoder;
extern AVCodec ffvhuff_decoder;
extern AVCodec oggvorbis_decoder;
extern AVCodec cyuv_decoder;
extern AVCodec h264_decoder;
extern AVCodec indeo3_decoder;
extern AVCodec vp3_decoder;
extern AVCodec theora_decoder;
extern AVCodec vp5_decoder;
extern AVCodec vp6_decoder;
extern AVCodec vp6f_decoder;
extern AVCodec amr_nb_decoder;
extern AVCodec amr_nb_encoder;
extern AVCodec amr_wb_encoder;
extern AVCodec amr_wb_decoder;
extern AVCodec aac_decoder;
extern AVCodec mpeg4aac_decoder;
extern AVCodec asv1_decoder;
extern AVCodec asv2_decoder;
extern AVCodec vcr1_decoder;
extern AVCodec cljr_decoder;
extern AVCodec ffv1_decoder;
extern AVCodec snow_decoder;
extern AVCodec fourxm_decoder;
extern AVCodec mdec_decoder;
extern AVCodec roq_decoder;
extern AVCodec interplay_video_decoder;
extern AVCodec xan_wc3_decoder;
extern AVCodec rpza_decoder;
extern AVCodec cinepak_decoder;
extern AVCodec msrle_decoder;
extern AVCodec msvideo1_decoder;
extern AVCodec vqa_decoder;
extern AVCodec idcin_decoder;
extern AVCodec eightbps_decoder;
extern AVCodec smc_decoder;
extern AVCodec flic_decoder;
extern AVCodec vmdvideo_decoder;
extern AVCodec vmdaudio_decoder;
extern AVCodec truemotion1_decoder;
extern AVCodec truemotion2_decoder;
extern AVCodec mszh_decoder;
extern AVCodec zlib_decoder;
extern AVCodec ra_144_decoder;
extern AVCodec ra_288_decoder;
extern AVCodec roq_dpcm_decoder;
extern AVCodec interplay_dpcm_decoder;
extern AVCodec xan_dpcm_decoder;
extern AVCodec sol_dpcm_decoder;
extern AVCodec sonic_decoder;
extern AVCodec qtrle_decoder;
extern AVCodec flac_decoder;
extern AVCodec tscc_decoder;
extern AVCodec cscd_decoder;
extern AVCodec nuv_decoder;
extern AVCodec ulti_decoder;
extern AVCodec qdraw_decoder;
extern AVCodec xl_decoder;
extern AVCodec qpeg_decoder;
extern AVCodec shorten_decoder;
extern AVCodec loco_decoder;
extern AVCodec wnv1_decoder;
extern AVCodec aasc_decoder;
extern AVCodec alac_decoder;
extern AVCodec ws_snd1_decoder;
extern AVCodec indeo2_decoder;
extern AVCodec vorbis_decoder;
extern AVCodec fraps_decoder;
extern AVCodec libgsm_encoder;
extern AVCodec libgsm_decoder;
extern AVCodec bmp_decoder;
extern AVCodec mmvideo_decoder;
extern AVCodec zmbv_decoder;
extern AVCodec avs_decoder;
extern AVCodec smacker_decoder;
extern AVCodec smackaud_decoder;
extern AVCodec kmvc_decoder;
extern AVCodec flashsv_decoder;
extern AVCodec cavs_decoder;
extern AVCodec vmnc_decoder;
extern AVCodec wavpack_decoder;
extern AVCodec targa_decoder;
extern AVCodec dsicinvideo_decoder;
extern AVCodec dsicinaudio_decoder;
extern AVCodec tiertexseqvideo_decoder;
extern AVCodec tiff_decoder;
extern AVCodec imc_decoder;
/* pcm codecs */
#define PCM_CODEC(id, name) \
extern AVCodec name ## _decoder; \
extern AVCodec name ## _encoder
PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
/* adpcm codecs */
PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
#undef PCM_CODEC
/* dummy raw video codec */
extern AVCodec rawvideo_encoder;
extern AVCodec rawvideo_decoder;
/* the following codecs use external GPL libs */
extern AVCodec ac3_decoder;
extern AVCodec dts_decoder;
/* subtitles */
extern AVCodec dvdsub_encoder;
extern AVCodec dvdsub_decoder;
extern AVCodec dvbsub_encoder;
extern AVCodec dvbsub_decoder;
/* resample.c */
struct ReSampleContext;
struct AVResampleContext;
typedef struct ReSampleContext ReSampleContext;
ReSampleContext *audio_resample_init(int output_channels, int input_channels,
int output_rate, int input_rate);
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
void audio_resample_close(ReSampleContext *s);
struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
void av_resample_close(struct AVResampleContext *c);
/* YUV420 format is assumed ! */
struct ImgReSampleContext;
typedef struct ImgReSampleContext ImgReSampleContext;
ImgReSampleContext *img_resample_init(int output_width, int output_height,
int input_width, int input_height);
ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
int iwidth, int iheight,
int topBand, int bottomBand,
int leftBand, int rightBand,
int padtop, int padbottom,
int padleft, int padright);
void img_resample(ImgReSampleContext *s,
AVPicture *output, const AVPicture *input);
void img_resample_close(ImgReSampleContext *s);
/**
* Allocate memory for a picture. Call avpicture_free to free it.
*
* @param picture the picture to be filled in.
* @param pix_fmt the format of the picture.
* @param width the width of the picture.
* @param height the height of the picture.
* @return 0 if successful, -1 if not.
*/
int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
/* Free a picture previously allocated by avpicture_alloc. */
void avpicture_free(AVPicture *picture);
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
int pix_fmt, int width, int height);
int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
unsigned char *dest, int dest_size);
int avpicture_get_size(int pix_fmt, int width, int height);
void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
const char *avcodec_get_pix_fmt_name(int pix_fmt);
void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
enum PixelFormat avcodec_get_pix_fmt(const char* name);
unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
#define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
#define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
#define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
#define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
#define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
#define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
int has_alpha);
int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
int has_alpha, int *loss_ptr);
#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
int img_get_alpha_info(const AVPicture *src,
int pix_fmt, int width, int height);
/* convert among pixel formats */
int img_convert(AVPicture *dst, int dst_pix_fmt,
const AVPicture *src, int pix_fmt,
int width, int height);
/* deinterlace a picture */
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
int pix_fmt, int width, int height);
/* external high level API */
extern AVCodec *first_avcodec;
/* returns LIBAVCODEC_VERSION_INT constant */
unsigned avcodec_version(void);
/* returns LIBAVCODEC_BUILD constant */
unsigned avcodec_build(void);
void avcodec_init(void);
void register_avcodec(AVCodec *format);
AVCodec *avcodec_find_encoder(enum CodecID id);
AVCodec *avcodec_find_encoder_by_name(const char *name);
AVCodec *avcodec_find_decoder(enum CodecID id);
AVCodec *avcodec_find_decoder_by_name(const char *name);
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
void avcodec_get_context_defaults(AVCodecContext *s);
AVCodecContext *avcodec_alloc_context(void);
void avcodec_get_frame_defaults(AVFrame *pic);
AVFrame *avcodec_alloc_frame(void);
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
int avcodec_thread_init(AVCodecContext *s, int thread_count);
void avcodec_thread_free(AVCodecContext *s);
int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
//FIXME func typedef
/**
* opens / inits the AVCodecContext.
* not thread save!
*/
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
/**
* Decode an audio frame.
*
* @param avctx the codec context.
* @param samples output buffer, 16 byte aligned
* @param frame_size_ptr the output buffer size in bytes, zero if no frame could be compressed
* @param buf input buffer, 16 byte aligned
* @param buf_size the input buffer size
* @return 0 if successful, -1 if not.
*/
int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
int *frame_size_ptr,
uint8_t *buf, int buf_size);
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
int *got_picture_ptr,
uint8_t *buf, int buf_size);
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
int *got_sub_ptr,
const uint8_t *buf, int buf_size);
int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
int *data_size_ptr,
uint8_t *buf, int buf_size);
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
const short *samples);
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
const AVFrame *pict);
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
const AVSubtitle *sub);
int avcodec_close(AVCodecContext *avctx);
void avcodec_register_all(void);
void avcodec_flush_buffers(AVCodecContext *avctx);
void avcodec_default_free_buffers(AVCodecContext *s);
/* misc usefull functions */
/**
* returns a single letter to describe the picture type
*/
char av_get_pict_type_char(int pict_type);
/**
* returns codec bits per sample
*/
int av_get_bits_per_sample(enum CodecID codec_id);
/* frame parsing */
typedef struct AVCodecParserContext {
void *priv_data;
struct AVCodecParser *parser;
int64_t frame_offset; /* offset of the current frame */
int64_t cur_offset; /* current offset
(incremented by each av_parser_parse()) */
int64_t last_frame_offset; /* offset of the last frame */
/* video info */
int pict_type; /* XXX: put it back in AVCodecContext */
int repeat_pict; /* XXX: put it back in AVCodecContext */
int64_t pts; /* pts of the current frame */
int64_t dts; /* dts of the current frame */
/* private data */
int64_t last_pts;
int64_t last_dts;
int fetch_timestamp;
#define AV_PARSER_PTS_NB 4
int cur_frame_start_index;
int64_t cur_frame_offset[AV_PARSER_PTS_NB];
int64_t cur_frame_pts[AV_PARSER_PTS_NB];
int64_t cur_frame_dts[AV_PARSER_PTS_NB];
int flags;
#define PARSER_FLAG_COMPLETE_FRAMES 0x0001
} AVCodecParserContext;
typedef struct AVCodecParser {
int codec_ids[5]; /* several codec IDs are permitted */
int priv_data_size;
int (*parser_init)(AVCodecParserContext *s);
int (*parser_parse)(AVCodecParserContext *s,
AVCodecContext *avctx,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size);
void (*parser_close)(AVCodecParserContext *s);
int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
struct AVCodecParser *next;
} AVCodecParser;
extern AVCodecParser *av_first_parser;
void av_register_codec_parser(AVCodecParser *parser);
AVCodecParserContext *av_parser_init(int codec_id);
int av_parser_parse(AVCodecParserContext *s,
AVCodecContext *avctx,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size,
int64_t pts, int64_t dts);
int av_parser_change(AVCodecParserContext *s,
AVCodecContext *avctx,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size, int keyframe);
void av_parser_close(AVCodecParserContext *s);
extern AVCodecParser mpegvideo_parser;
extern AVCodecParser mpeg4video_parser;
extern AVCodecParser cavsvideo_parser;
extern AVCodecParser h261_parser;
extern AVCodecParser h263_parser;
extern AVCodecParser h264_parser;
extern AVCodecParser mjpeg_parser;
extern AVCodecParser pnm_parser;
extern AVCodecParser mpegaudio_parser;
extern AVCodecParser ac3_parser;
extern AVCodecParser dvdsub_parser;
extern AVCodecParser dvbsub_parser;
extern AVCodecParser aac_parser;
typedef struct AVBitStreamFilterContext {
void *priv_data;
struct AVBitStreamFilter *filter;
AVCodecParserContext *parser;
struct AVBitStreamFilterContext *next;
} AVBitStreamFilterContext;
typedef struct AVBitStreamFilter {
const char *name;
int priv_data_size;
int (*filter)(AVBitStreamFilterContext *bsfc,
AVCodecContext *avctx, const char *args,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size, int keyframe);
struct AVBitStreamFilter *next;
} AVBitStreamFilter;
extern AVBitStreamFilter *av_first_bitstream_filter;
void av_register_bitstream_filter(AVBitStreamFilter *bsf);
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
AVCodecContext *avctx, const char *args,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size, int keyframe);
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
extern AVBitStreamFilter dump_extradata_bsf;
extern AVBitStreamFilter remove_extradata_bsf;
extern AVBitStreamFilter noise_bsf;
extern AVBitStreamFilter mp3_header_compress_bsf;
extern AVBitStreamFilter mp3_header_decompress_bsf;
/* memory */
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
/* for static data only */
/* call av_free_static to release all staticaly allocated tables */
void av_free_static(void);
void *av_mallocz_static(unsigned int size);
void *av_realloc_static(void *ptr, unsigned int size);
void img_copy(AVPicture *dst, const AVPicture *src,
int pix_fmt, int width, int height);
int img_crop(AVPicture *dst, const AVPicture *src,
int pix_fmt, int top_band, int left_band);
int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
int padtop, int padbottom, int padleft, int padright, int *color);
/* endian macros */
#if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
(((uint8_t*)(x))[1] << 16) | \
(((uint8_t*)(x))[2] << 8) | \
((uint8_t*)(x))[3])
#define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
#define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
(((uint8_t*)(x))[2] << 16) | \
(((uint8_t*)(x))[1] << 8) | \
((uint8_t*)(x))[0])
#endif
extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
#ifdef __cplusplus
}
#endif
#endif /* AVCODEC_H */
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