/* * 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 AVCODEC_AVCODEC_H #define AVCODEC_AVCODEC_H /** * @file avcodec.h * external API header */ #include "libavutil/avutil.h" #define LIBAVCODEC_VERSION_MAJOR 52 #define LIBAVCODEC_VERSION_MINOR 6 #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, /* video codecs */ 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, CODEC_ID_MIMIC, CODEC_ID_RL2, CODEC_ID_8SVX_EXP, CODEC_ID_8SVX_FIB, CODEC_ID_ESCAPE124, CODEC_ID_DIRAC, CODEC_ID_BFI, CODEC_ID_CMV, CODEC_ID_MOTIONPIXELS, CODEC_ID_TGV, CODEC_ID_TGQ, /* 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, CODEC_ID_PCM_DVD, CODEC_ID_PCM_F32BE, CODEC_ID_PCM_F32LE, CODEC_ID_PCM_F64BE, CODEC_ID_PCM_F64LE, /* 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, CODEC_ID_ADPCM_EA_MAXIS_XA, /* 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, /* audio codecs */ CODEC_ID_MP2= 0x15000, CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3 CODEC_ID_AAC, CODEC_ID_AC3, CODEC_ID_DTS, CODEC_ID_VORBIS, CODEC_ID_DVAUDIO, CODEC_ID_WMAV1, CODEC_ID_WMAV2, CODEC_ID_MACE3, CODEC_ID_MACE6, CODEC_ID_VMDAUDIO, CODEC_ID_SONIC, CODEC_ID_SONIC_LS, CODEC_ID_FLAC, CODEC_ID_MP3ADU, CODEC_ID_MP3ON4, CODEC_ID_SHORTEN, CODEC_ID_ALAC, CODEC_ID_WESTWOOD_SND1, CODEC_ID_GSM, ///< as in Berlin toast format CODEC_ID_QDM2, CODEC_ID_COOK, CODEC_ID_TRUESPEECH, CODEC_ID_TTA, CODEC_ID_SMACKAUDIO, CODEC_ID_QCELP, CODEC_ID_WAVPACK, CODEC_ID_DSICINAUDIO, CODEC_ID_IMC, CODEC_ID_MUSEPACK7, CODEC_ID_MLP, CODEC_ID_GSM_MS, /* as found in WAV */ CODEC_ID_ATRAC3, CODEC_ID_VOXWARE, CODEC_ID_APE, CODEC_ID_NELLYMOSER, CODEC_ID_MUSEPACK8, CODEC_ID_SPEEX, CODEC_ID_WMAVOICE, CODEC_ID_WMAPRO, CODEC_ID_WMALOSSLESS, CODEC_ID_ATRAC3P, CODEC_ID_EAC3, CODEC_ID_SIPR, /* 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 (generally used for attachments) */ CODEC_ID_TTF= 0x18000, CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS * stream (only used by libavformat) */ }; enum CodecType { CODEC_TYPE_UNKNOWN = -1, CODEC_TYPE_VIDEO, CODEC_TYPE_AUDIO, CODEC_TYPE_DATA, CODEC_TYPE_SUBTITLE, CODEC_TYPE_ATTACHMENT, CODEC_TYPE_NB }; /** * all in native-endian format */ enum SampleFormat { SAMPLE_FMT_NONE = -1, SAMPLE_FMT_U8, ///< unsigned 8 bits SAMPLE_FMT_S16, ///< signed 16 bits SAMPLE_FMT_S32, ///< signed 32 bits SAMPLE_FMT_FLT, ///< float SAMPLE_FMT_DBL, ///< double SAMPLE_FMT_NB ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec }; /* Audio channel masks */ #define CH_FRONT_LEFT 0x00000001 #define CH_FRONT_RIGHT 0x00000002 #define CH_FRONT_CENTER 0x00000004 #define CH_LOW_FREQUENCY 0x00000008 #define CH_BACK_LEFT 0x00000010 #define CH_BACK_RIGHT 0x00000020 #define CH_FRONT_LEFT_OF_CENTER 0x00000040 #define CH_FRONT_RIGHT_OF_CENTER 0x00000080 #define CH_BACK_CENTER 0x00000100 #define CH_SIDE_LEFT 0x00000200 #define CH_SIDE_RIGHT 0x00000400 #define CH_TOP_CENTER 0x00000800 #define CH_TOP_FRONT_LEFT 0x00001000 #define CH_TOP_FRONT_CENTER 0x00002000 #define CH_TOP_FRONT_RIGHT 0x00004000 #define CH_TOP_BACK_LEFT 0x00008000 #define CH_TOP_BACK_CENTER 0x00010000 #define CH_TOP_BACK_RIGHT 0x00020000 #define CH_STEREO_LEFT 0x20000000 ///< Stereo downmix. #define CH_STEREO_RIGHT 0x40000000 ///< See CH_STEREO_LEFT. /* Audio channel convenience macros */ #define CH_LAYOUT_MONO (CH_FRONT_CENTER) #define CH_LAYOUT_STEREO (CH_FRONT_LEFT|CH_FRONT_RIGHT) #define CH_LAYOUT_SURROUND (CH_LAYOUT_STEREO|CH_FRONT_CENTER) #define CH_LAYOUT_QUAD (CH_LAYOUT_STEREO|CH_BACK_LEFT|CH_BACK_RIGHT) #define CH_LAYOUT_5POINT0 (CH_LAYOUT_SURROUND|CH_SIDE_LEFT|CH_SIDE_RIGHT) #define CH_LAYOUT_5POINT1 (CH_LAYOUT_5POINT0|CH_LOW_FREQUENCY) #define CH_LAYOUT_7POINT1 (CH_LAYOUT_5POINT1|CH_BACK_LEFT|CH_BACK_RIGHT) #define CH_LAYOUT_7POINT1_WIDE (CH_LAYOUT_SURROUND|CH_LOW_FREQUENCY|\ CH_BACK_LEFT|CH_BACK_RIGHT|\ CH_FRONT_LEFT_OF_CENTER|CH_FRONT_RIGHT_OF_CENTER) #define CH_LAYOUT_STEREO_DOWNMIX (CH_STEREO_LEFT|CH_STEREO_RIGHT) /* 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.
* 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 ME_TESA, ///< transformed exhaustive search algorithm }; 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_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_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 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\ * The values for this are the same as the MpegEncContext.picture_structure\ * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\ * - encoding: unused\ * - decoding: Set by libavcodec. (before get_buffer() call)).\ */\ 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];\ \ /**\ * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\ * output in AVFrame.reordered_opaque\ * - encoding: unused\ * - decoding: Read by user.\ */\ int64_t reordered_opaque;\ #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 ///< Switching Intra #define FF_SP_TYPE 6 ///< Switching Predicted #define FF_BI_TYPE 7 #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; /** * 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 */ const 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), 10 (tesa) [7, 8, 10 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; ///< number of audio 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 * 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_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; 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: Set by user. * Setting this to STRICT or higher means the encoder and decoder will * generally do stupid things. While setting it to inofficial or lower * will mean the encoder might use things that are not supported by all * spec compliant decoders. Decoders make no difference between normal, * inofficial and experimental, that is they always try to decode things * when they can unless they are explicitly asked to behave stupid * (=strictly conform to the specs) */ 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 * - encoding: Set by user. * - decoding: unused */ float b_quant_offset; /** * Error recognization; higher values will detect more errors but may * misdetect some more or less valid parts as errors. * - encoding: unused * - decoding: Set by user. */ int error_recognition; #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 were allocated with get_buffer. * A released buffer can be reused in get_buffer(). * pic.data[*] must be set to NULL. * - encoding: unused * - decoding: Set by libavcodec., user can override. */ 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; /** * 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 #define FF_IDCT_EA 21 /** * 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 #define FF_MM_ALTIVEC 0x0001 ///< standard AltiVec /** * bits per sample/pixel from the demuxer (needed for huffyuv). * - encoding: Set by libavcodec. * - decoding: Set by user. */ int bits_per_coded_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) * That is the width of a pixel divided by the height of the pixel. * Numerator and denominator must be relatively prime and smaller than 256 for some video standards. * - encoding: Set by user. * - decoding: Set by libavcodec. */ 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 #define FF_DEBUG_BUFFERS 0x00008000 /** * 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< ('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, int size); /** * 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), 3 (auto) * - 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; #if LIBAVCODEC_VERSION_MAJOR < 53 /** * Decoder should decode to this many channels if it can (0 for default) * - encoding: unused * - decoding: Set by user. * @deprecated Deprecated in favor of request_channel_layout. */ int request_channels; #endif /** * 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; /** * opaque 64bit number (generally a PTS) that will be reordered and * output in AVFrame.reordered_opaque * - encoding: unused * - decoding: Set by user. */ int64_t reordered_opaque; /** * Bits per sample/pixel of internal libavcodec pixel/sample format. * This field is applicable only when sample_fmt is SAMPLE_FMT_S32. * - encoding: set by user. * - decoding: set by libavcodec. */ int bits_per_raw_sample; /** * Audio channel layout. * - encoding: set by user. * - decoding: set by libavcodec. */ int64_t channel_layout; /** * Request decoder to use this channel layout if it can (0 for default) * - encoding: unused * - decoding: Set by user. */ int64_t request_channel_layout; /** * Ratecontrol attempt to use, at maximum, of what can be used without an underflow. * - encoding: Set by user. * - decoding: unused. */ float rc_max_available_vbv_use; /** * Ratecontrol attempt to use, at least, times the amount needed to prevent a vbv overflow. * - encoding: Set by user. * - decoding: unused. */ float rc_min_vbv_overflow_use; } 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); /** * Codec capabilities. * see CODEC_CAP_* */ int capabilities; struct AVCodec *next; /** * Flush buffers. * Will be called when seeking */ 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 terminated by -1 /** * Descriptive name for the codec, meant to be more human readable than \p name. * You \e should use the NULL_IF_CONFIG_SMALL() macro to define it. */ const char *long_name; const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0 const enum SampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1 const int64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0 } 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); /** * 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(int64_t 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); /* 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 */ AVCodec *av_codec_next(AVCodec *c); /** * Returns the LIBAVCODEC_VERSION_INT constant. */ unsigned avcodec_version(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 size); int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size); //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); /** * 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. * For PCM audio the number of samples read from \p samples is equal to * \p buf_size * input_sample_size / output_sample_size. * @return On error a negative value is returned, on success zero or the number * of bytes used to encode the data read from the input buffer. */ 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 next_frame_offset; /* offset of the next 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 cur_frame_end[AV_PARSER_PTS_NB]; } 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; 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); /** * 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); 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 * x 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 * /, 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 /* AVCODEC_AVCODEC_H */