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Diffstat (limited to 'contrib/ffmpeg/libavcodec/avcodec.h')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/avcodec.h | 3002 |
1 files changed, 3002 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/avcodec.h b/contrib/ffmpeg/libavcodec/avcodec.h new file mode 100644 index 000000000..32dd4da28 --- /dev/null +++ b/contrib/ffmpeg/libavcodec/avcodec.h @@ -0,0 +1,3002 @@ +/* + * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef FFMPEG_AVCODEC_H +#define FFMPEG_AVCODEC_H + +/** + * @file avcodec.h + * external API header + */ + + +#include "libavutil/avutil.h" +#include <sys/types.h> /* size_t */ + +#define LIBAVCODEC_VERSION_MAJOR 51 +#define LIBAVCODEC_VERSION_MINOR 50 +#define LIBAVCODEC_VERSION_MICRO 1 + +#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \ + LIBAVCODEC_VERSION_MINOR, \ + LIBAVCODEC_VERSION_MICRO) +#define LIBAVCODEC_VERSION AV_VERSION(LIBAVCODEC_VERSION_MAJOR, \ + LIBAVCODEC_VERSION_MINOR, \ + LIBAVCODEC_VERSION_MICRO) +#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT + +#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION) + +#define AV_NOPTS_VALUE INT64_C(0x8000000000000000) +#define AV_TIME_BASE 1000000 +#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE} + +/** + * Identifies the syntax and semantics of the bitstream. + * The principle is roughly: + * Two decoders with the same ID can decode the same streams. + * Two encoders with the same ID can encode compatible streams. + * There may be slight deviations from the principle due to implementation + * details. + * + * If you add a codec ID to this list, add it so that + * 1. no value of a existing codec ID changes (that would break ABI), + * 2. it is as close as possible to similar codecs. + */ +enum CodecID { + CODEC_ID_NONE, + CODEC_ID_MPEG1VIDEO, + CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding + CODEC_ID_MPEG2VIDEO_XVMC, + CODEC_ID_H261, + CODEC_ID_H263, + CODEC_ID_RV10, + CODEC_ID_RV20, + CODEC_ID_MJPEG, + CODEC_ID_MJPEGB, + CODEC_ID_LJPEG, + CODEC_ID_SP5X, + CODEC_ID_JPEGLS, + CODEC_ID_MPEG4, + CODEC_ID_RAWVIDEO, + CODEC_ID_MSMPEG4V1, + CODEC_ID_MSMPEG4V2, + CODEC_ID_MSMPEG4V3, + CODEC_ID_WMV1, + CODEC_ID_WMV2, + CODEC_ID_H263P, + CODEC_ID_H263I, + CODEC_ID_FLV1, + CODEC_ID_SVQ1, + CODEC_ID_SVQ3, + CODEC_ID_DVVIDEO, + CODEC_ID_HUFFYUV, + CODEC_ID_CYUV, + CODEC_ID_H264, + CODEC_ID_INDEO3, + CODEC_ID_VP3, + CODEC_ID_THEORA, + CODEC_ID_ASV1, + CODEC_ID_ASV2, + CODEC_ID_FFV1, + CODEC_ID_4XM, + CODEC_ID_VCR1, + CODEC_ID_CLJR, + CODEC_ID_MDEC, + CODEC_ID_ROQ, + CODEC_ID_INTERPLAY_VIDEO, + CODEC_ID_XAN_WC3, + CODEC_ID_XAN_WC4, + CODEC_ID_RPZA, + CODEC_ID_CINEPAK, + CODEC_ID_WS_VQA, + CODEC_ID_MSRLE, + CODEC_ID_MSVIDEO1, + CODEC_ID_IDCIN, + CODEC_ID_8BPS, + CODEC_ID_SMC, + CODEC_ID_FLIC, + CODEC_ID_TRUEMOTION1, + CODEC_ID_VMDVIDEO, + CODEC_ID_MSZH, + CODEC_ID_ZLIB, + CODEC_ID_QTRLE, + CODEC_ID_SNOW, + CODEC_ID_TSCC, + CODEC_ID_ULTI, + CODEC_ID_QDRAW, + CODEC_ID_VIXL, + CODEC_ID_QPEG, + CODEC_ID_XVID, + CODEC_ID_PNG, + CODEC_ID_PPM, + CODEC_ID_PBM, + CODEC_ID_PGM, + CODEC_ID_PGMYUV, + CODEC_ID_PAM, + CODEC_ID_FFVHUFF, + CODEC_ID_RV30, + CODEC_ID_RV40, + CODEC_ID_VC1, + CODEC_ID_WMV3, + CODEC_ID_LOCO, + CODEC_ID_WNV1, + CODEC_ID_AASC, + CODEC_ID_INDEO2, + CODEC_ID_FRAPS, + CODEC_ID_TRUEMOTION2, + CODEC_ID_BMP, + CODEC_ID_CSCD, + CODEC_ID_MMVIDEO, + CODEC_ID_ZMBV, + CODEC_ID_AVS, + CODEC_ID_SMACKVIDEO, + CODEC_ID_NUV, + CODEC_ID_KMVC, + CODEC_ID_FLASHSV, + CODEC_ID_CAVS, + CODEC_ID_JPEG2000, + CODEC_ID_VMNC, + CODEC_ID_VP5, + CODEC_ID_VP6, + CODEC_ID_VP6F, + CODEC_ID_TARGA, + CODEC_ID_DSICINVIDEO, + CODEC_ID_TIERTEXSEQVIDEO, + CODEC_ID_TIFF, + CODEC_ID_GIF, + CODEC_ID_FFH264, + CODEC_ID_DXA, + CODEC_ID_DNXHD, + CODEC_ID_THP, + CODEC_ID_SGI, + CODEC_ID_C93, + CODEC_ID_BETHSOFTVID, + CODEC_ID_PTX, + CODEC_ID_TXD, + CODEC_ID_VP6A, + CODEC_ID_AMV, + CODEC_ID_VB, + CODEC_ID_PCX, + CODEC_ID_SUNRAST, + CODEC_ID_INDEO4, + CODEC_ID_INDEO5, + + /* 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, + CODEC_ID_PCM_ZORK, + CODEC_ID_PCM_S16LE_PLANAR, + + /* 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, + CODEC_ID_ADPCM_THP, + CODEC_ID_ADPCM_IMA_AMV, + CODEC_ID_ADPCM_EA_R1, + CODEC_ID_ADPCM_EA_R3, + CODEC_ID_ADPCM_EA_R2, + CODEC_ID_ADPCM_IMA_EA_SEAD, + CODEC_ID_ADPCM_IMA_EA_EACS, + CODEC_ID_ADPCM_EA_XAS, + + /* 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, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3 + 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, ///< as in Berlin toast format + CODEC_ID_QDM2, + CODEC_ID_COOK, + CODEC_ID_TRUESPEECH, + CODEC_ID_TTA, + CODEC_ID_SMACKAUDIO, + CODEC_ID_QCELP, + CODEC_ID_WAVPACK, + CODEC_ID_DSICINAUDIO, + CODEC_ID_IMC, + CODEC_ID_MUSEPACK7, + CODEC_ID_MLP, + CODEC_ID_GSM_MS, /* as found in WAV */ + CODEC_ID_ATRAC3, + CODEC_ID_VOXWARE, + CODEC_ID_APE, + CODEC_ID_NELLYMOSER, + CODEC_ID_MUSEPACK8, + CODEC_ID_SPEEX, + CODEC_ID_WMAVOICE, + CODEC_ID_WMAPRO, + CODEC_ID_WMALOSSLESS, + + /* subtitle codecs */ + CODEC_ID_DVD_SUBTITLE= 0x17000, + CODEC_ID_DVB_SUBTITLE, + CODEC_ID_TEXT, ///< raw UTF-8 text + CODEC_ID_XSUB, + CODEC_ID_SSA, + CODEC_ID_MOV_TEXT, + + /* other specific kind of codecs (generaly used for attachments) */ + CODEC_ID_TTF= 0x18000, + + CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS + * stream (only used by libavformat) */ +}; + +#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) +/* CODEC_ID_MP3LAME is obsolete */ +#define CODEC_ID_MP3LAME CODEC_ID_MP3 +#define CODEC_ID_MPEG4AAC CODEC_ID_AAC +#endif + +enum CodecType { + CODEC_TYPE_UNKNOWN = -1, + CODEC_TYPE_VIDEO, + CODEC_TYPE_AUDIO, + CODEC_TYPE_DATA, + CODEC_TYPE_SUBTITLE, + CODEC_TYPE_ATTACHMENT, + CODEC_TYPE_NB +}; + +/** + * Currently unused, may be used if 24/32 bits samples are ever supported. + * all in native-endian format + */ +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. + */ +enum Motion_Est_ID { + ME_ZERO = 1, ///< no search, that is use 0,0 vector whenever one is needed + ME_FULL, + ME_LOG, + ME_PHODS, + ME_EPZS, ///< enhanced predictive zonal search + ME_X1, ///< reserved for experiments + ME_HEX, ///< hexagon based search + ME_UMH, ///< uneven multi-hexagon search + ME_ITER, ///< iterative search +}; + +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 initialization. + 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 H.263. +#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. +/** + * The parent program guarantees that the input for B-frames containing + * streams is not written to for at least s->max_b_frames+1 frames, if + * this is not set the input will be copied. + */ +#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 */ +#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) +#define CODEC_FLAG_H263P_AIC 0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction (remove this) +#endif +#define CODEC_FLAG_AC_PRED 0x01000000 ///< H.263 advanced intra coding / MPEG-4 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 ///< H.263 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 one reference per partition, as opposed to one reference per macroblock +#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. +#define CODEC_FLAG2_SKIP_RD 0x00004000 ///< RD optimal MB level residual skipping +#define CODEC_FLAG2_CHUNKS 0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries. +#define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer. +#define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible + +/* Unsupported options : + * Syntax Arithmetic coding (SAC) + * Reference Picture Selection + * Independent 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 nonzero delay and needs to be fed with NULL at the end to get the delayed data. + * If this is not set, the codec is guaranteed to never be fed 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 H.264-specific +#define MB_TYPE_INTRA_PCM 0x0004 //FIXME H.264-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 libavcodec. + */ + int id; + + /** + * width and height in 1/16 pel + * - encoding: Set by user. + * - decoding: Set by libavcodec. + */ + int width; + int height; + + /** + * position of the top left corner in 1/16 pel for up to 3 fields/frames + * - encoding: Set by user. + * - decoding: Set by libavcodec. + */ + int16_t position[3][2]; +}AVPanScan; + +#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 libavcodec unless the default get/release_buffer() is used.\ + * - encoding: \ + * - decoding: \ + */\ + uint8_t *base[4];\ + /**\ + * 1 -> keyframe, 0-> not\ + * - encoding: Set by libavcodec.\ + * - decoding: Set by libavcodec.\ + */\ + int key_frame;\ +\ + /**\ + * Picture type of the frame, see ?_TYPE below.\ + * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\ + * - decoding: Set by libavcodec.\ + */\ + 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 libavcodec.\ + */\ + int64_t pts;\ +\ + /**\ + * picture number in bitstream order\ + * - encoding: set by\ + * - decoding: Set by libavcodec.\ + */\ + int coded_picture_number;\ + /**\ + * picture number in display order\ + * - encoding: set by\ + * - decoding: Set by libavcodec.\ + */\ + int display_picture_number;\ +\ + /**\ + * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \ + * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\ + * - decoding: Set by libavcodec.\ + */\ + 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 libavcodec. (before get_buffer() call)).\ + */\ + int reference;\ +\ + /**\ + * QP table\ + * - encoding: unused\ + * - decoding: Set by libavcodec.\ + */\ + int8_t *qscale_table;\ + /**\ + * QP store stride\ + * - encoding: unused\ + * - decoding: Set by libavcodec.\ + */\ + int qstride;\ +\ + /**\ + * mbskip_table[mb]>=1 if MB didn't change\ + * stride= mb_width = (width+15)>>4\ + * - encoding: unused\ + * - decoding: Set by libavcodec.\ + */\ + 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 libavcodec.\ + */\ + int16_t (*motion_val[2])[2];\ +\ + /**\ + * macroblock type table\ + * mb_type_base + mb_width + 2\ + * - encoding: Set by user.\ + * - decoding: Set by libavcodec.\ + */\ + 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 libavcodec.\ + */\ + uint8_t motion_subsample_log2;\ +\ + /**\ + * for some private data of the user\ + * - encoding: unused\ + * - decoding: Set by user.\ + */\ + void *opaque;\ +\ + /**\ + * error\ + * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\ + * - decoding: unused\ + */\ + uint64_t error[4];\ +\ + /**\ + * type of the buffer (to keep track of who has to deallocate data[*])\ + * - encoding: Set by the one who allocates it.\ + * - decoding: Set by the one who allocates it.\ + * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\ + */\ + int type;\ + \ + /**\ + * When decoding, this signals how much the picture must be delayed.\ + * extra_delay = repeat_pict / (2*fps)\ + * - encoding: unused\ + * - decoding: Set by libavcodec.\ + */\ + int repeat_pict;\ + \ + /**\ + * \ + */\ + int qscale_type;\ + \ + /**\ + * The content of the picture is interlaced.\ + * - encoding: Set by user.\ + * - decoding: Set by libavcodec. (default 0)\ + */\ + int interlaced_frame;\ + \ + /**\ + * If the content is interlaced, is top field displayed first.\ + * - encoding: Set by user.\ + * - decoding: Set by libavcodec.\ + */\ + int top_field_first;\ + \ + /**\ + * Pan scan.\ + * - encoding: Set by user.\ + * - decoding: Set by libavcodec.\ + */\ + AVPanScan *pan_scan;\ + \ + /**\ + * Tell user application that palette has changed from previous frame.\ + * - encoding: ??? (no palette-enabled encoder yet)\ + * - decoding: Set by libavcodec. (default 0).\ + */\ + int palette_has_changed;\ + \ + /**\ + * codec suggestion on buffer type if != 0\ + * - encoding: unused\ + * - decoding: Set by libavcodec. (before get_buffer() call)).\ + */\ + int buffer_hints;\ +\ + /**\ + * DCT coefficients\ + * - encoding: unused\ + * - decoding: Set by libavcodec.\ + */\ + short *dct_coeff;\ +\ + /**\ + * motion referece frame index\ + * - encoding: Set by user.\ + * - decoding: Set by libavcodec.\ + */\ + 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 deallocate image (data/base), all other tables are not shared. +#define FF_BUFFER_TYPE_COPY 8 ///< Just a (modified) copy of some other buffer, don't deallocate anything. + + +#define FF_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. + * New fields can be added to the end of FF_COMMON_FRAME with minor version + * bumps. + * Removal, reordering and changes to existing fields require a major + * version bump. No fields should be added into AVFrame before or after + * FF_COMMON_FRAME! + * sizeof(AVFrame) must not be used outside libav*. + */ +typedef struct AVFrame { + FF_COMMON_FRAME +} AVFrame; + +#define DEFAULT_FRAME_RATE_BASE 1001000 + +/** + * main external API structure. + * New fields can be added to the end with minor version bumps. + * Removal, reordering and changes to existing fields require a major + * version bump. + * sizeof(AVCodecContext) must not be used outside libav*. + */ +typedef struct AVCodecContext { + /** + * information 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 libavcodec. 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 need additional format info. It is stored here. + * If any muxer uses this then ALL demuxers/parsers AND encoders for the + * specific codec MUST set it correctly otherwise stream copy breaks. + * In general use of this field by muxers is not recommanded. + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. (FIXME: Is this OK?) + */ + 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 extradata like Huffman tables. + * mjpeg: Huffman tables + * rv10: additional flags + * mpeg4: global headers (they can be in the bitstream or here) + * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger + * than extradata_size to avoid prolems if it is read with the bitstream reader. + * The bytewise contents of extradata must not depend on the architecture or CPU endianness. + * - encoding: Set/allocated/freed by libavcodec. + * - decoding: Set/allocated/freed by user. + */ + 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 libavcodec. + */ + AVRational time_base; + + /* video only */ + /** + * picture width / height. + * - encoding: MUST be set by user. + * - decoding: Set by libavcodec. + * Note: For compatibility it is possible to set this instead of + * coded_width/height before decoding. + */ + int width, height; + +#define FF_ASPECT_EXTENDED 15 + + /** + * the number of pictures in a group of pictures, 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 libavcodec. + */ + enum PixelFormat pix_fmt; + + /** + * Frame rate emulation. If not zero, the lower layer (i.e. format handler) + * has to read frames at native frame rate. + * - encoding: Set by user. + * - decoding: unused + */ + int rate_emu; + + /** + * If non NULL, 'draw_horiz_band' is called by the libavcodec + * decoder to draw a horizontal band. It improves cache usage. Not + * all codecs can do that. You must check the codec capabilities + * beforehand. + * - encoding: unused + * - decoding: Set by user. + * @param height the height of the slice + * @param y the y position of the slice + * @param type 1->top field, 2->bottom field, 3->frame + * @param offset offset into the AVFrame.data from which the slice should be read + */ + 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 second + int channels; + + /** + * audio sample format + * - encoding: Set by user. + * - decoding: Set by libavcodec. + */ + enum SampleFormat sample_fmt; ///< sample format, currently 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 libavcodec. + * - 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 between 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 + * - encoding: unused + * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header + * @deprecated Deprecated in favor of skip_idct and skip_frame. + */ + int hurry_up; + + struct AVCodec *codec; + + void *priv_data; + +#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) + /* unused, FIXME remove*/ + int rtp_mode; +#endif + + int rtp_payload_size; /* The size of the RTP payload: the coder will */ + /* do its best to deliver a chunk with size */ + /* below rtp_payload_size, the chunk will start */ + /* with a start code on some codecs like H.263. */ + /* This doesn't take account of any particular */ + /* headers inside the transmitted RTP payload. */ + + + /* The RTP callback: This function is called */ + /* every time the encoder has a packet to send. */ + /* It depends on the encoder if the data starts */ + /* with a Start Code (it should). H.263 does. */ + /* mb_nb contains the number of macroblocks */ + /* encoded in the RTP payload. */ + void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb); + + /* 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 libavcodec. + * - 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 work around some encoder bugs. + * A demuxer should set this to what is stored in the field used to identify the codec. + * If there are multiple such fields in a container then the demuxer should choose the one + * which maximizes the information about the used codec. + * If the codec tag field in a container is larger then 32 bits then the demuxer should + * remap the longer ID to 32 bits with a table or other structure. Alternatively a new + * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated + * first. + * - encoding: Set by user, if not then the default based on codec_id will be used. + * - decoding: Set by user, will be converted to uppercase by libavcodec during init. + */ + unsigned int codec_tag; + + /** + * Work around 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 ///< Work around various bugs in Microsoft's broken decoders. +//#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%. + + /** + * luma single coefficient 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 standard (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 nonstandardized 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 + * misdetect 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 libavcodec. + * avcodec_align_dimensions() should be used to find the required width and + * height, as they normally need to be rounded up to the next multiple of 16. + * - encoding: unused + * - decoding: Set by libavcodec., user can override. + */ + 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 libavcodec., 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 libavcodec. + * - decoding: Set by libavcodec. + */ + 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 libavcodec. + * - 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 + */ + const 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; + + +#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) + /* for binary compatibility */ + int unused; +#endif + + /** + * 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 +#define FF_IDCT_SIMPLEARMV6 17 +#define FF_IDCT_SIMPLEVIS 18 +#define FF_IDCT_WMV2 19 +#define FF_IDCT_FAAN 20 + + /** + * slice count + * - encoding: Set by libavcodec. + * - decoding: Set by user (or 0). + */ + int slice_count; + /** + * slice offsets in the frame in bytes + * - encoding: Set/allocated by libavcodec. + * - 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 the 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 */ +#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 +#define FF_MM_SSE3 0x0040 ///< Prescott SSE3 functions +#define FF_MM_SSSE3 0x0080 ///< Conroe SSSE3 functions +#define FF_MM_IWMMXT 0x0100 ///< XScale IWMMXT + + /** + * bits per sample/pixel from the demuxer (needed for huffyuv). + * - encoding: Set by libavcodec. + * - 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 relatively prime and smaller than 256 for some video standards. + * - encoding: Set by user. + * - decoding: Set by libavcodec. + */ + AVRational sample_aspect_ratio; + + /** + * the picture in the bitstream + * - encoding: Set by libavcodec. + * - decoding: Set by libavcodec. + */ + 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 libavcodec 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 comparison function + * - encoding: Set by user. + * - decoding: unused + */ + int me_cmp; + /** + * subpixel motion estimation comparison function + * - encoding: Set by user. + * - decoding: unused + */ + int me_sub_cmp; + /** + * macroblock comparison function (not supported yet) + * - encoding: Set by user. + * - decoding: unused + */ + int mb_cmp; + /** + * interlaced DCT comparison 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; + + /** + * prepass for motion estimation + * - encoding: Set by user. + * - decoding: unused + */ + int pre_me; + + /** + * motion estimation prepass comparison function + * - encoding: Set by user. + * - decoding: unused + */ + int me_pre_cmp; + + /** + * ME prepass 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, + * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. + * The first is always the native one. + * @return the chosen format + * - encoding: unused + * - decoding: Set by user, if not set the native format will be chosen. + */ + enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt); + + /** + * DTG active format information (additional aspect ratio + * information only used in DVB MPEG-2 transport streams) + * 0 if not set. + * + * - encoding: unused + * - decoding: Set by decoder. + */ + 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. + * Tables have to be stored somewhere. FIXME + */ + int color_table_id; + + /** + * internal_buffer count + * Don't touch, used by libavcodec default_get_buffer(). + */ + int internal_buffer_count; + + /** + * internal_buffers + * Don't touch, used by libavcodec 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 MPEG-1/2/4 qscale. + * - encoding: Set by user. + * - decoding: unused + */ + int global_quality; + +#define FF_CODER_TYPE_VLC 0 +#define FF_CODER_TYPE_AC 1 +#define FF_CODER_TYPE_RAW 2 +#define FF_CODER_TYPE_RLE 3 +#define FF_CODER_TYPE_DEFLATE 4 + /** + * 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 libavcodec. + */ + uint16_t *intra_matrix; + + /** + * custom inter quantization matrix + * - encoding: Set by user, can be NULL. + * - decoding: Set by libavcodec. + */ + 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 work around some encoder bugs. + * - encoding: unused + * - decoding: Set by user, will be converted to uppercase by libavcodec 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. libavcodec won't check it. + * libavcodec will pass previous buffer in pic, function should return + * same buffer or new buffer with old frame "painted" into it. + * If pic.data[0] == NULL must behave like get_buffer(). + * - encoding: unused + * - decoding: Set by libavcodec., user can override + */ + 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 independent 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 independent things. + * It will return only after finishing all tasks. + * The user may replace this with some multithreaded implementation, + * the default implementation will execute the parts serially. + * @param count the number of things to execute + * - encoding: Set by libavcodec, user can override. + * - decoding: Set by libavcodec, user can override. + */ + int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count); + + /** + * 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 below 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 below 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 libavcodec. + */ + int profile; +#define FF_PROFILE_UNKNOWN -99 +#define FF_PROFILE_AAC_MAIN 0 +#define FF_PROFILE_AAC_LOW 1 +#define FF_PROFILE_AAC_SSR 2 +#define FF_PROFILE_AAC_LTP 3 + + /** + * level + * - encoding: Set by user. + * - decoding: Set by libavcodec. + */ + 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; + + /** + * Bitstream width / height, may be different from width/height if lowres + * or other things are used. + * - encoding: unused + * - decoding: Set by user before init if known. Codec should override / dynamically change if needed. + */ + 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 comparison 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 /* Analyze i4x4 */ +#define X264_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */ +#define X264_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */ +#define X264_PART_P4X4 0x020 /* Analyze p8x4, p4x8, p4x4 */ +#define X264_PART_B8X8 0x100 /* Analyze 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") + * - 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 function 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; + + /** + * Decoder should decode to this many channels if it can (0 for default) + * - encoding: unused + * - decoding: Set by user. + */ + int request_channels; + + /** + * Percentage of dynamic range compression to be applied by the decoder. + * The default value is 1.0, corresponding to full compression. + * - encoding: unused + * - decoding: Set by user. + */ + float drc_scale; +} AVCodecContext; + +/** + * AVCodec. + */ +typedef struct AVCodec { + /** + * Name of the codec implementation. + * The name is globally unique among encoders and among decoders (but an + * encoder and a decoder can share the same name). + * This is the primary way to find a codec from the user perspective. + */ + 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, + const uint8_t *buf, int buf_size); + int capabilities; + 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. + * + * @deprecated Use AVPacket to send palette changes instead. + * This is totally broken. + */ +#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 an 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; + + +/* 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); + +#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) +/* YUV420 format is assumed ! */ + +/** + * @deprecated Use the software scaler (swscale) instead. + */ +typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated; + +/** + * @deprecated Use the software scaler (swscale) instead. + */ +attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height, + int input_width, int input_height); + +/** + * @deprecated Use the software scaler (swscale) instead. + */ +attribute_deprecated 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); + +/** + * @deprecated Use the software scaler (swscale) instead. + */ +attribute_deprecated void img_resample(struct ImgReSampleContext *s, + AVPicture *output, const AVPicture *input); + +/** + * @deprecated Use the software scaler (swscale) instead. + */ +attribute_deprecated void img_resample_close(struct ImgReSampleContext *s); + +#endif + +/** + * Allocate memory for a picture. Call avpicture_free to free it. + * + * @param picture the picture to be filled in + * @param pix_fmt the format of the picture + * @param width the width of the picture + * @param height the height of the picture + * @return zero if successful, a negative value if not + */ +int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height); + +/** + * Free a picture previously allocated by avpicture_alloc(). + * + * @param picture the AVPicture to be freed + */ +void avpicture_free(AVPicture *picture); + +/** + * Fill in the AVPicture fields. + * The fields of the given AVPicture are filled in by using the 'ptr' address + * which points to the image data buffer. Depending on the specified picture + * format, one or multiple image data pointers and line sizes will be set. + * If a planar format is specified, several pointers will be set pointing to + * the different picture planes and the line sizes of the different planes + * will be stored in the lines_sizes array. + * + * @param picture AVPicture whose fields are to be filled in + * @param ptr Buffer which will contain or contains the actual image data + * @param pix_fmt The format in which the picture data is stored. + * @param width the width of the image in pixels + * @param height the height of the image in pixels + * @return size of the image data in bytes + */ +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); + +/** + * Calculate the size in bytes that a picture of the given width and height + * would occupy if stored in the given picture format. + * + * @param pix_fmt the given picture format + * @param width the width of the image + * @param height the height of the image + * @return Image data size in bytes + */ +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) */ + +/** + * Computes what kind of losses will occur when converting from one specific + * pixel format to another. + * When converting from one pixel format to another, information loss may occur. + * For example, when converting from RGB24 to GRAY, the color information will + * be lost. Similarly, other losses occur when converting from some formats to + * other formats. These losses can involve loss of chroma, but also loss of + * resolution, loss of color depth, loss due to the color space conversion, loss + * of the alpha bits or loss due to color quantization. + * avcodec_get_fix_fmt_loss() informs you about the various types of losses + * which will occur when converting from one pixel format to another. + * + * @param[in] dst_pix_fmt destination pixel format + * @param[in] src_pix_fmt source pixel format + * @param[in] has_alpha Whether the source pixel format alpha channel is used. + * @return Combination of flags informing you what kind of losses will occur. + */ +int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt, + int has_alpha); + +/** + * Finds the best pixel format to convert to given a certain source pixel + * format. When converting from one pixel format to another, information loss + * may occur. For example, when converting from RGB24 to GRAY, the color + * information will be lost. Similarly, other losses occur when converting from + * some formats to other formats. avcodec_find_best_pix_fmt() searches which of + * the given pixel formats should be used to suffer the least amount of loss. + * The pixel formats from which it chooses one, are determined by the + * \p pix_fmt_mask parameter. + * + * @code + * src_pix_fmt = PIX_FMT_YUV420P; + * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24); + * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss); + * @endcode + * + * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from + * @param[in] src_pix_fmt source pixel format + * @param[in] has_alpha Whether the source pixel format alpha channel is used. + * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur. + * @return The best pixel format to convert to or -1 if none was found. + */ +int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt, + int has_alpha, int *loss_ptr); + + +/** + * Print in buf the string corresponding to the pixel format with + * number pix_fmt, or an header if pix_fmt is negative. + * + * @param[in] buf the buffer where to write the string + * @param[in] buf_size the size of buf + * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or + * a negative value to print the corresponding header. + * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1. + */ +void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt); + +#define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */ +#define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */ + +/** + * Tell if an image really has transparent alpha values. + * @return ored mask of FF_ALPHA_xxx constants + */ +int img_get_alpha_info(const AVPicture *src, + int pix_fmt, int width, int height); + +#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) +/** + * convert among pixel formats + * @deprecated Use the software scaler (swscale) instead. + */ +attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt, + const AVPicture *src, int pix_fmt, + int width, int height); +#endif + +/* deinterlace a picture */ +/* deinterlace - if not supported return -1 */ +int avpicture_deinterlace(AVPicture *dst, const AVPicture *src, + int pix_fmt, int width, int height); + +/* external high level API */ + +#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) +extern AVCodec *first_avcodec; +#endif +AVCodec *av_codec_next(AVCodec *c); + +/* returns LIBAVCODEC_VERSION_INT constant */ +unsigned avcodec_version(void); +/* returns LIBAVCODEC_BUILD constant */ +unsigned avcodec_build(void); + +/** + * Initializes libavcodec. + * + * @warning This function \e must be called before any other libavcodec + * function. + */ +void avcodec_init(void); + +void register_avcodec(AVCodec *format); + +/** + * Finds a registered encoder with a matching codec ID. + * + * @param id CodecID of the requested encoder + * @return An encoder if one was found, NULL otherwise. + */ +AVCodec *avcodec_find_encoder(enum CodecID id); + +/** + * Finds a registered encoder with the specified name. + * + * @param name name of the requested encoder + * @return An encoder if one was found, NULL otherwise. + */ +AVCodec *avcodec_find_encoder_by_name(const char *name); + +/** + * Finds a registered decoder with a matching codec ID. + * + * @param id CodecID of the requested decoder + * @return A decoder if one was found, NULL otherwise. + */ +AVCodec *avcodec_find_decoder(enum CodecID id); + +/** + * Finds a registered decoder with the specified name. + * + * @param name name of the requested decoder + * @return A decoder if one was found, NULL otherwise. + */ +AVCodec *avcodec_find_decoder_by_name(const char *name); +void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode); + +/** + * Sets the fields of the given AVCodecContext to default values. + * + * @param s The AVCodecContext of which the fields should be set to default values. + */ +void avcodec_get_context_defaults(AVCodecContext *s); + +/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API! + * we WILL change its arguments and name a few times! */ +void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType); + +/** + * Allocates an AVCodecContext and sets its fields to default values. The + * resulting struct can be deallocated by simply calling av_free(). + * + * @return An AVCodecContext filled with default values or NULL on failure. + * @see avcodec_get_context_defaults + */ +AVCodecContext *avcodec_alloc_context(void); + +/** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API! + * we WILL change its arguments and name a few times! */ +AVCodecContext *avcodec_alloc_context2(enum CodecType); + +/** + * Sets the fields of the given AVFrame to default values. + * + * @param pic The AVFrame of which the fields should be set to default values. + */ +void avcodec_get_frame_defaults(AVFrame *pic); + +/** + * Allocates an AVFrame and sets its fields to default values. The resulting + * struct can be deallocated by simply calling av_free(). + * + * @return An AVFrame filled with default values or NULL on failure. + * @see avcodec_get_frame_defaults + */ +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); + +/** + * Checks if the given dimension of a picture is valid, meaning that all + * bytes of the picture can be addressed with a signed int. + * + * @param[in] w Width of the picture. + * @param[in] h Height of the picture. + * @return Zero if valid, a negative value if invalid. + */ +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 + +/** + * Initializes the AVCodecContext to use the given AVCodec. Prior to using this + * function the context has to be allocated. + * + * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(), + * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for + * retrieving a codec. + * + * @warning This function is not thread safe! + * + * @code + * avcodec_register_all(); + * codec = avcodec_find_decoder(CODEC_ID_H264); + * if (!codec) + * exit(1); + * + * context = avcodec_alloc_context(); + * + * if (avcodec_open(context, codec) < 0) + * exit(1); + * @endcode + * + * @param avctx The context which will be set up to use the given codec. + * @param codec The codec to use within the context. + * @return zero on success, a negative value on error + * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder + */ +int avcodec_open(AVCodecContext *avctx, AVCodec *codec); + +/** + * @deprecated Use avcodec_decode_audio2() instead. + */ +attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples, + int *frame_size_ptr, + const uint8_t *buf, int buf_size); + +/** + * Decodes an audio frame from \p buf into \p samples. + * The avcodec_decode_audio2() function decodes an audio frame from the input + * buffer \p buf of size \p buf_size. To decode it, it makes use of the + * audio codec which was coupled with \p avctx using avcodec_open(). The + * resulting decoded frame is stored in output buffer \p samples. If no frame + * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the + * decompressed frame size in \e bytes. + * + * @warning You \e must set \p frame_size_ptr to the allocated size of the + * output buffer before calling avcodec_decode_audio2(). + * + * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than + * the actual read bytes because some optimized bitstream readers read 32 or 64 + * bits at once and could read over the end. + * + * @warning The end of the input buffer \p buf should be set to 0 to ensure that + * no overreading happens for damaged MPEG streams. + * + * @note You might have to align the input buffer \p buf and output buffer \p + * samples. The alignment requirements depend on the CPU: On some CPUs it isn't + * necessary at all, on others it won't work at all if not aligned and on others + * it will work but it will have an impact on performance. In practice, the + * bitstream should have 4 byte alignment at minimum and all sample data should + * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If + * the linesize is not a multiple of 16 then there's no sense in aligning the + * start of the buffer to 16. + * + * @param avctx the codec context + * @param[out] samples the output buffer + * @param[in,out] frame_size_ptr the output buffer size in bytes + * @param[in] buf the input buffer + * @param[in] buf_size the input buffer size in bytes + * @return On error a negative value is returned, otherwise the number of bytes + * used or zero if no frame could be decompressed. + */ +int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples, + int *frame_size_ptr, + const uint8_t *buf, int buf_size); + +/** + * Decodes a video frame from \p buf into \p picture. + * The avcodec_decode_video() function decodes a video frame from the input + * buffer \p buf of size \p buf_size. To decode it, it makes use of the + * video codec which was coupled with \p avctx using avcodec_open(). The + * resulting decoded frame is stored in \p picture. + * + * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than + * the actual read bytes because some optimized bitstream readers read 32 or 64 + * bits at once and could read over the end. + * + * @warning The end of the input buffer \p buf should be set to 0 to ensure that + * no overreading happens for damaged MPEG streams. + * + * @note You might have to align the input buffer \p buf and output buffer \p + * samples. The alignment requirements depend on the CPU: on some CPUs it isn't + * necessary at all, on others it won't work at all if not aligned and on others + * it will work but it will have an impact on performance. In practice, the + * bitstream should have 4 byte alignment at minimum and all sample data should + * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If + * the linesize is not a multiple of 16 then there's no sense in aligning the + * start of the buffer to 16. + * + * @param avctx the codec context + * @param[out] picture The AVFrame in which the decoded video frame will be stored. + * @param[in] buf the input buffer + * @param[in] buf_size the size of the input buffer in bytes + * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero. + * @return On error a negative value is returned, otherwise the number of bytes + * used or zero if no frame could be decompressed. + */ +int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture, + int *got_picture_ptr, + const uint8_t *buf, int buf_size); + +/* Decode a subtitle message. Return -1 if error, otherwise return the + * number of bytes used. If no subtitle could be decompressed, + * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */ +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); + +/** + * Encodes an audio frame from \p samples into \p buf. + * The avcodec_encode_audio() function encodes an audio frame from the input + * buffer \p samples. To encode it, it makes use of the audio codec which was + * coupled with \p avctx using avcodec_open(). The resulting encoded frame is + * stored in output buffer \p buf. + * + * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large. + * + * @param avctx the codec context + * @param[out] buf the output buffer + * @param[in] buf_size the output buffer size + * @param[in] samples the input buffer containing the samples + * The number of samples read from this buffer is frame_size*channels, + * both of which are defined in \p avctx. + * @return On error a negative value is returned, on success zero or the number + * of bytes used to encode the data read from the input buffer. + */ +int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size, + const short *samples); + +/** + * Encodes a video frame from \p pict into \p buf. + * The avcodec_encode_video() function encodes a video frame from the input + * \p pict. To encode it, it makes use of the video codec which was coupled with + * \p avctx using avcodec_open(). The resulting encoded bytes representing the + * frame are stored in the output buffer \p buf. The input picture should be + * stored using a specific format, namely \c avctx.pix_fmt. + * + * @param avctx the codec context + * @param[out] buf the output buffer for the bitstream of encoded frame + * @param[in] buf_size the size of the output buffer in bytes + * @param[in] pict the input picture to encode + * @return On error a negative value is returned, on success zero or the number + * of bytes used from the input buffer. + */ +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); + +/** + * Flush buffers, should be called when seeking or when switching to a different stream. + */ +void avcodec_flush_buffers(AVCodecContext *avctx); + +void avcodec_default_free_buffers(AVCodecContext *s); + +/* misc useful functions */ + +/** + * Returns a single letter to describe the given picture type \p pict_type. + * + * @param[in] pict_type the picture type + * @return A single character representing the picture type. + */ +char av_get_pict_type_char(int pict_type); + +/** + * Returns codec bits per sample. + * + * @param[in] codec_id the codec + * @return Number of bits per sample or zero if unknown for the given codec. + */ +int av_get_bits_per_sample(enum CodecID codec_id); + +/** + * Returns sample format bits per sample. + * + * @param[in] sample_fmt the sample format + * @return Number of bits per sample or zero if unknown for the given sample format. + */ +int av_get_bits_per_sample_format(enum SampleFormat sample_fmt); + +/* 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 + + int64_t offset; ///< byte offset from starting packet start + int64_t last_offset; +} 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, + const 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; + +#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) +extern AVCodecParser *av_first_parser; +#endif +AVCodecParser *av_parser_next(AVCodecParser *c); + +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); + + +typedef struct AVBitStreamFilterContext { + void *priv_data; + struct AVBitStreamFilter *filter; + AVCodecParserContext *parser; + struct AVBitStreamFilterContext *next; +} AVBitStreamFilterContext; + + +typedef struct AVBitStreamFilter { + const char *name; + int priv_data_size; + int (*filter)(AVBitStreamFilterContext *bsfc, + AVCodecContext *avctx, const char *args, + uint8_t **poutbuf, int *poutbuf_size, + const uint8_t *buf, int buf_size, int keyframe); + void (*close)(AVBitStreamFilterContext *bsfc); + struct AVBitStreamFilter *next; +} AVBitStreamFilter; + +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); + +AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f); + +/* memory */ + +/** + * Reallocates the given block if it is not large enough, otherwise it + * does nothing. + * + * @see av_realloc + */ +void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size); + +/* for static data only */ + +/** + * Frees all static arrays and resets their pointers to 0. + * Call this function to release all statically allocated tables. + * + * @deprecated. Code which uses av_free_static is broken/misdesigned + * and should correctly use static arrays + * + */ +attribute_deprecated void av_free_static(void); + +/** + * Allocation of static arrays. + * + * @warning Do not use for normal allocation. + * + * @param[in] size The amount of memory you need in bytes. + * @return block of memory of the requested size + * @deprecated. Code which uses av_mallocz_static is broken/misdesigned + * and should correctly use static arrays + */ +attribute_deprecated void *av_mallocz_static(unsigned int size); + +/** + * Copy image 'src' to 'dst'. + */ +void av_picture_copy(AVPicture *dst, const AVPicture *src, + int pix_fmt, int width, int height); + +/** + * Crop image top and left side. + */ +int av_picture_crop(AVPicture *dst, const AVPicture *src, + int pix_fmt, int top_band, int left_band); + +/** + * Pad image. + */ +int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt, + int padtop, int padbottom, int padleft, int padright, int *color); + +#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0) +/** + * @deprecated Use the software scaler (swscale) instead. + */ +attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src, + int pix_fmt, int width, int height); + +/** + * @deprecated Use the software scaler (swscale) instead. + */ +attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src, + int pix_fmt, int top_band, int left_band); + +/** + * @deprecated Use the software scaler (swscale) instead. + */ +attribute_deprecated 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); +#endif + +extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v); + +/** + * Parses \p str and put in \p width_ptr and \p height_ptr the detected values. + * + * @return 0 in case of a successful parsing, a negative value otherwise + * @param[in] str the string to parse: it has to be a string in the format + * <width>x<height> or a valid video frame size abbreviation. + * @param[in,out] width_ptr pointer to the variable which will contain the detected + * frame width value + * @param[in,out] height_ptr pointer to the variable which will contain the detected + * frame height value + */ +int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str); + +/** + * Parses \p str and put in \p frame_rate the detected values. + * + * @return 0 in case of a successful parsing, a negative value otherwise + * @param[in] str the string to parse: it has to be a string in the format + * <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation + * @param[in,out] frame_rate pointer to the AVRational which will contain the detected + * frame rate + */ +int av_parse_video_frame_rate(AVRational *frame_rate, const char *str); + +/* error handling */ +#if EINVAL > 0 +#define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */ +#define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */ +#else +/* Some platforms have E* and errno already negated. */ +#define AVERROR(e) (e) +#define AVUNERROR(e) (e) +#endif +#define AVERROR_UNKNOWN AVERROR(EINVAL) /**< unknown error */ +#define AVERROR_IO AVERROR(EIO) /**< I/O error */ +#define AVERROR_NUMEXPECTED AVERROR(EDOM) /**< Number syntax expected in filename. */ +#define AVERROR_INVALIDDATA AVERROR(EINVAL) /**< invalid data found */ +#define AVERROR_NOMEM AVERROR(ENOMEM) /**< not enough memory */ +#define AVERROR_NOFMT AVERROR(EILSEQ) /**< unknown format */ +#define AVERROR_NOTSUPP AVERROR(ENOSYS) /**< Operation not supported. */ +#define AVERROR_NOENT AVERROR(ENOENT) /**< No such file or directory. */ +#define AVERROR_PATCHWELCOME -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */ + +#endif /* FFMPEG_AVCODEC_H */ |