libavcodec/avcodec.h

   1 /*
   2  * copyright (c) 2001 Fabrice Bellard
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef AVCODEC_AVCODEC_H
  22 #define AVCODEC_AVCODEC_H
  23
  24 /**
  25  * @file avcodec.h
  26  * external API header
  27  */
  28
  29
  30 #include "libavutil/avutil.h"
  31
  32 #define LIBAVCODEC_VERSION_MAJOR 51
  33 #define LIBAVCODEC_VERSION_MINOR 71
  34 #define LIBAVCODEC_VERSION_MICRO  0
  35
  36 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
  37                                                LIBAVCODEC_VERSION_MINOR, \
  38                                                LIBAVCODEC_VERSION_MICRO)
  39 #define LIBAVCODEC_VERSION      AV_VERSION(LIBAVCODEC_VERSION_MAJOR,    \
  40                                            LIBAVCODEC_VERSION_MINOR,    \
  41                                            LIBAVCODEC_VERSION_MICRO)
  42 #define LIBAVCODEC_BUILD        LIBAVCODEC_VERSION_INT
  43
  44 #define LIBAVCODEC_IDENT        "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
  45
  46 #define AV_NOPTS_VALUE          INT64_C(0x8000000000000000)
  47 #define AV_TIME_BASE            1000000
  48 #define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
  49
  50 /**
  51  * Identifies the syntax and semantics of the bitstream.
  52  * The principle is roughly:
  53  * Two decoders with the same ID can decode the same streams.
  54  * Two encoders with the same ID can encode compatible streams.
  55  * There may be slight deviations from the principle due to implementation
  56  * details.
  57  *
  58  * If you add a codec ID to this list, add it so that
  59  * 1. no value of a existing codec ID changes (that would break ABI),
  60  * 2. it is as close as possible to similar codecs.
  61  */
  62 enum CodecID {
  63     CODEC_ID_NONE,
  64
  65     /* video codecs */
  66     CODEC_ID_MPEG1VIDEO,
  67     CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
  68     CODEC_ID_MPEG2VIDEO_XVMC,
  69     CODEC_ID_H261,
  70     CODEC_ID_H263,
  71     CODEC_ID_RV10,
  72     CODEC_ID_RV20,
  73     CODEC_ID_MJPEG,
  74     CODEC_ID_MJPEGB,
  75     CODEC_ID_LJPEG,
  76     CODEC_ID_SP5X,
  77     CODEC_ID_JPEGLS,
  78     CODEC_ID_MPEG4,
  79     CODEC_ID_RAWVIDEO,
  80     CODEC_ID_MSMPEG4V1,
  81     CODEC_ID_MSMPEG4V2,
  82     CODEC_ID_MSMPEG4V3,
  83     CODEC_ID_WMV1,
  84     CODEC_ID_WMV2,
  85     CODEC_ID_H263P,
  86     CODEC_ID_H263I,
  87     CODEC_ID_FLV1,
  88     CODEC_ID_SVQ1,
  89     CODEC_ID_SVQ3,
  90     CODEC_ID_DVVIDEO,
  91     CODEC_ID_HUFFYUV,
  92     CODEC_ID_CYUV,
  93     CODEC_ID_H264,
  94     CODEC_ID_INDEO3,
  95     CODEC_ID_VP3,
  96     CODEC_ID_THEORA,
  97     CODEC_ID_ASV1,
  98     CODEC_ID_ASV2,
  99     CODEC_ID_FFV1,
 100     CODEC_ID_4XM,
 101     CODEC_ID_VCR1,
 102     CODEC_ID_CLJR,
 103     CODEC_ID_MDEC,
 104     CODEC_ID_ROQ,
 105     CODEC_ID_INTERPLAY_VIDEO,
 106     CODEC_ID_XAN_WC3,
 107     CODEC_ID_XAN_WC4,
 108     CODEC_ID_RPZA,
 109     CODEC_ID_CINEPAK,
 110     CODEC_ID_WS_VQA,
 111     CODEC_ID_MSRLE,
 112     CODEC_ID_MSVIDEO1,
 113     CODEC_ID_IDCIN,
 114     CODEC_ID_8BPS,
 115     CODEC_ID_SMC,
 116     CODEC_ID_FLIC,
 117     CODEC_ID_TRUEMOTION1,
 118     CODEC_ID_VMDVIDEO,
 119     CODEC_ID_MSZH,
 120     CODEC_ID_ZLIB,
 121     CODEC_ID_QTRLE,
 122     CODEC_ID_SNOW,
 123     CODEC_ID_TSCC,
 124     CODEC_ID_ULTI,
 125     CODEC_ID_QDRAW,
 126     CODEC_ID_VIXL,
 127     CODEC_ID_QPEG,
 128     CODEC_ID_XVID,
 129     CODEC_ID_PNG,
 130     CODEC_ID_PPM,
 131     CODEC_ID_PBM,
 132     CODEC_ID_PGM,
 133     CODEC_ID_PGMYUV,
 134     CODEC_ID_PAM,
 135     CODEC_ID_FFVHUFF,
 136     CODEC_ID_RV30,
 137     CODEC_ID_RV40,
 138     CODEC_ID_VC1,
 139     CODEC_ID_WMV3,
 140     CODEC_ID_LOCO,
 141     CODEC_ID_WNV1,
 142     CODEC_ID_AASC,
 143     CODEC_ID_INDEO2,
 144     CODEC_ID_FRAPS,
 145     CODEC_ID_TRUEMOTION2,
 146     CODEC_ID_BMP,
 147     CODEC_ID_CSCD,
 148     CODEC_ID_MMVIDEO,
 149     CODEC_ID_ZMBV,
 150     CODEC_ID_AVS,
 151     CODEC_ID_SMACKVIDEO,
 152     CODEC_ID_NUV,
 153     CODEC_ID_KMVC,
 154     CODEC_ID_FLASHSV,
 155     CODEC_ID_CAVS,
 156     CODEC_ID_JPEG2000,
 157     CODEC_ID_VMNC,
 158     CODEC_ID_VP5,
 159     CODEC_ID_VP6,
 160     CODEC_ID_VP6F,
 161     CODEC_ID_TARGA,
 162     CODEC_ID_DSICINVIDEO,
 163     CODEC_ID_TIERTEXSEQVIDEO,
 164     CODEC_ID_TIFF,
 165     CODEC_ID_GIF,
 166     CODEC_ID_FFH264,
 167     CODEC_ID_DXA,
 168     CODEC_ID_DNXHD,
 169     CODEC_ID_THP,
 170     CODEC_ID_SGI,
 171     CODEC_ID_C93,
 172     CODEC_ID_BETHSOFTVID,
 173     CODEC_ID_PTX,
 174     CODEC_ID_TXD,
 175     CODEC_ID_VP6A,
 176     CODEC_ID_AMV,
 177     CODEC_ID_VB,
 178     CODEC_ID_PCX,
 179     CODEC_ID_SUNRAST,
 180     CODEC_ID_INDEO4,
 181     CODEC_ID_INDEO5,
 182     CODEC_ID_MIMIC,
 183     CODEC_ID_RL2,
 184     CODEC_ID_8SVX_EXP,
 185     CODEC_ID_8SVX_FIB,
 186     CODEC_ID_ESCAPE124,
 187     CODEC_ID_DIRAC,
 188     CODEC_ID_BFI,
 189     CODEC_ID_CMV,
 190     CODEC_ID_MOTIONPIXELS,
 191     CODEC_ID_TGV,
 192
 193     /* various PCM "codecs" */
 194     CODEC_ID_PCM_S16LE= 0x10000,
 195     CODEC_ID_PCM_S16BE,
 196     CODEC_ID_PCM_U16LE,
 197     CODEC_ID_PCM_U16BE,
 198     CODEC_ID_PCM_S8,
 199     CODEC_ID_PCM_U8,
 200     CODEC_ID_PCM_MULAW,
 201     CODEC_ID_PCM_ALAW,
 202     CODEC_ID_PCM_S32LE,
 203     CODEC_ID_PCM_S32BE,
 204     CODEC_ID_PCM_U32LE,
 205     CODEC_ID_PCM_U32BE,
 206     CODEC_ID_PCM_S24LE,
 207     CODEC_ID_PCM_S24BE,
 208     CODEC_ID_PCM_U24LE,
 209     CODEC_ID_PCM_U24BE,
 210     CODEC_ID_PCM_S24DAUD,
 211     CODEC_ID_PCM_ZORK,
 212     CODEC_ID_PCM_S16LE_PLANAR,
 213     CODEC_ID_PCM_DVD,
 214     CODEC_ID_PCM_F32BE,
 215     CODEC_ID_PCM_F32LE,
 216     CODEC_ID_PCM_F64BE,
 217     CODEC_ID_PCM_F64LE,
 218
 219     /* various ADPCM codecs */
 220     CODEC_ID_ADPCM_IMA_QT= 0x11000,
 221     CODEC_ID_ADPCM_IMA_WAV,
 222     CODEC_ID_ADPCM_IMA_DK3,
 223     CODEC_ID_ADPCM_IMA_DK4,
 224     CODEC_ID_ADPCM_IMA_WS,
 225     CODEC_ID_ADPCM_IMA_SMJPEG,
 226     CODEC_ID_ADPCM_MS,
 227     CODEC_ID_ADPCM_4XM,
 228     CODEC_ID_ADPCM_XA,
 229     CODEC_ID_ADPCM_ADX,
 230     CODEC_ID_ADPCM_EA,
 231     CODEC_ID_ADPCM_G726,
 232     CODEC_ID_ADPCM_CT,
 233     CODEC_ID_ADPCM_SWF,
 234     CODEC_ID_ADPCM_YAMAHA,
 235     CODEC_ID_ADPCM_SBPRO_4,
 236     CODEC_ID_ADPCM_SBPRO_3,
 237     CODEC_ID_ADPCM_SBPRO_2,
 238     CODEC_ID_ADPCM_THP,
 239     CODEC_ID_ADPCM_IMA_AMV,
 240     CODEC_ID_ADPCM_EA_R1,
 241     CODEC_ID_ADPCM_EA_R3,
 242     CODEC_ID_ADPCM_EA_R2,
 243     CODEC_ID_ADPCM_IMA_EA_SEAD,
 244     CODEC_ID_ADPCM_IMA_EA_EACS,
 245     CODEC_ID_ADPCM_EA_XAS,
 246     CODEC_ID_ADPCM_EA_MAXIS_XA,
 247
 248     /* AMR */
 249     CODEC_ID_AMR_NB= 0x12000,
 250     CODEC_ID_AMR_WB,
 251
 252     /* RealAudio codecs*/
 253     CODEC_ID_RA_144= 0x13000,
 254     CODEC_ID_RA_288,
 255
 256     /* various DPCM codecs */
 257     CODEC_ID_ROQ_DPCM= 0x14000,
 258     CODEC_ID_INTERPLAY_DPCM,
 259     CODEC_ID_XAN_DPCM,
 260     CODEC_ID_SOL_DPCM,
 261
 262     /* audio codecs */
 263     CODEC_ID_MP2= 0x15000,
 264     CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
 265     CODEC_ID_AAC,
 266 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
 267     CODEC_ID_MPEG4AAC,
 268 #endif
 269     CODEC_ID_AC3,
 270     CODEC_ID_DTS,
 271     CODEC_ID_VORBIS,
 272     CODEC_ID_DVAUDIO,
 273     CODEC_ID_WMAV1,
 274     CODEC_ID_WMAV2,
 275     CODEC_ID_MACE3,
 276     CODEC_ID_MACE6,
 277     CODEC_ID_VMDAUDIO,
 278     CODEC_ID_SONIC,
 279     CODEC_ID_SONIC_LS,
 280     CODEC_ID_FLAC,
 281     CODEC_ID_MP3ADU,
 282     CODEC_ID_MP3ON4,
 283     CODEC_ID_SHORTEN,
 284     CODEC_ID_ALAC,
 285     CODEC_ID_WESTWOOD_SND1,
 286     CODEC_ID_GSM, ///< as in Berlin toast format
 287     CODEC_ID_QDM2,
 288     CODEC_ID_COOK,
 289     CODEC_ID_TRUESPEECH,
 290     CODEC_ID_TTA,
 291     CODEC_ID_SMACKAUDIO,
 292     CODEC_ID_QCELP,
 293     CODEC_ID_WAVPACK,
 294     CODEC_ID_DSICINAUDIO,
 295     CODEC_ID_IMC,
 296     CODEC_ID_MUSEPACK7,
 297     CODEC_ID_MLP,
 298     CODEC_ID_GSM_MS, /* as found in WAV */
 299     CODEC_ID_ATRAC3,
 300     CODEC_ID_VOXWARE,
 301     CODEC_ID_APE,
 302     CODEC_ID_NELLYMOSER,
 303     CODEC_ID_MUSEPACK8,
 304     CODEC_ID_SPEEX,
 305     CODEC_ID_WMAVOICE,
 306     CODEC_ID_WMAPRO,
 307     CODEC_ID_WMALOSSLESS,
 308     CODEC_ID_ATRAC3P,
 309     CODEC_ID_EAC3,
 310
 311     /* subtitle codecs */
 312     CODEC_ID_DVD_SUBTITLE= 0x17000,
 313     CODEC_ID_DVB_SUBTITLE,
 314     CODEC_ID_TEXT,  ///< raw UTF-8 text
 315     CODEC_ID_XSUB,
 316     CODEC_ID_SSA,
 317     CODEC_ID_MOV_TEXT,
 318
 319     /* other specific kind of codecs (generally used for attachments) */
 320     CODEC_ID_TTF= 0x18000,
 321
 322     CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
 323
 324     CODEC_ID_MPEG2TS= 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
 325                                 * stream (only used by libavformat) */
 326 };
 327
 328 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
 329 /* CODEC_ID_MP3LAME is obsolete */
 330 #define CODEC_ID_MP3LAME CODEC_ID_MP3
 331 #define CODEC_ID_MPEG4AAC CODEC_ID_AAC
 332 #endif
 333
 334 enum CodecType {
 335     CODEC_TYPE_UNKNOWN = -1,
 336     CODEC_TYPE_VIDEO,
 337     CODEC_TYPE_AUDIO,
 338     CODEC_TYPE_DATA,
 339     CODEC_TYPE_SUBTITLE,
 340     CODEC_TYPE_ATTACHMENT,
 341     CODEC_TYPE_NB
 342 };
 343
 344 /**
 345  * all in native-endian format
 346  */
 347 enum SampleFormat {
 348     SAMPLE_FMT_NONE = -1,
 349     SAMPLE_FMT_U8,              ///< unsigned 8 bits
 350     SAMPLE_FMT_S16,             ///< signed 16 bits
 351     SAMPLE_FMT_S24,             ///< signed 24 bits @deprecated Deprecated in favor of SAMPLE_FMT_S32
 352     SAMPLE_FMT_S32,             ///< signed 32 bits
 353     SAMPLE_FMT_FLT,             ///< float
 354     SAMPLE_FMT_DBL,             ///< double
 355     SAMPLE_FMT_NB               ///< Number of sample formats. DO NOT USE if dynamically linking to libavcodec
 356 };
 357
 358 /* in bytes */
 359 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
 360
 361 /**
 362  * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
 363  * This is mainly needed because some optimized bitstream readers read
 364  * 32 or 64 bit at once and could read over the end.<br>
 365  * Note: If the first 23 bits of the additional bytes are not 0, then damaged
 366  * MPEG bitstreams could cause overread and segfault.
 367  */
 368 #define FF_INPUT_BUFFER_PADDING_SIZE 8
 369
 370 /**
 371  * minimum encoding buffer size
 372  * Used to avoid some checks during header writing.
 373  */
 374 #define FF_MIN_BUFFER_SIZE 16384
 375
 376 /**
 377  * motion estimation type.
 378  */
 379 enum Motion_Est_ID {
 380     ME_ZERO = 1,    ///< no search, that is use 0,0 vector whenever one is needed
 381     ME_FULL,
 382     ME_LOG,
 383     ME_PHODS,
 384     ME_EPZS,        ///< enhanced predictive zonal search
 385     ME_X1,          ///< reserved for experiments
 386     ME_HEX,         ///< hexagon based search
 387     ME_UMH,         ///< uneven multi-hexagon search
 388     ME_ITER,        ///< iterative search
 389     ME_TESA,        ///< transformed exhaustive search algorithm
 390 };
 391
 392 enum AVDiscard{
 393     /* We leave some space between them for extensions (drop some
 394      * keyframes for intra-only or drop just some bidir frames). */
 395     AVDISCARD_NONE   =-16, ///< discard nothing
 396     AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
 397     AVDISCARD_NONREF =  8, ///< discard all non reference
 398     AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
 399     AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
 400     AVDISCARD_ALL    = 48, ///< discard all
 401 };
 402
 403 typedef struct RcOverride{
 404     int start_frame;
 405     int end_frame;
 406     int qscale; // If this is 0 then quality_factor will be used instead.
 407     float quality_factor;
 408 } RcOverride;
 409
 410 #define FF_MAX_B_FRAMES 16
 411
 412 /* encoding support
 413    These flags can be passed in AVCodecContext.flags before initialization.
 414    Note: Not everything is supported yet.
 415 */
 416
 417 #define CODEC_FLAG_QSCALE 0x0002  ///< Use fixed qscale.
 418 #define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / advanced prediction for H.263.
 419 #define CODEC_FLAG_QPEL   0x0010  ///< Use qpel MC.
 420 #define CODEC_FLAG_GMC    0x0020  ///< Use GMC.
 421 #define CODEC_FLAG_MV0    0x0040  ///< Always try a MB with MV=<0,0>.
 422 #define CODEC_FLAG_PART   0x0080  ///< Use data partitioning.
 423 /**
 424  * The parent program guarantees that the input for B-frames containing
 425  * streams is not written to for at least s->max_b_frames+1 frames, if
 426  * this is not set the input will be copied.
 427  */
 428 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
 429 #define CODEC_FLAG_PASS1           0x0200   ///< Use internal 2pass ratecontrol in first pass mode.
 430 #define CODEC_FLAG_PASS2           0x0400   ///< Use internal 2pass ratecontrol in second pass mode.
 431 #define CODEC_FLAG_EXTERN_HUFF     0x1000   ///< Use external Huffman table (for MJPEG).
 432 #define CODEC_FLAG_GRAY            0x2000   ///< Only decode/encode grayscale.
 433 #define CODEC_FLAG_EMU_EDGE        0x4000   ///< Don't draw edges.
 434 #define CODEC_FLAG_PSNR            0x8000   ///< error[?] variables will be set during encoding.
 435 #define CODEC_FLAG_TRUNCATED       0x00010000 /** Input bitstream might be truncated at a random
 436                                                   location instead of only at frame boundaries. */
 437 #define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< Normalize adaptive quantization.
 438 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< Use interlaced DCT.
 439 #define CODEC_FLAG_LOW_DELAY      0x00080000 ///< Force low delay.
 440 #define CODEC_FLAG_ALT_SCAN       0x00100000 ///< Use alternate scan.
 441 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
 442 #define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< Use trellis quantization.
 443 #endif
 444 #define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< Place global headers in extradata instead of every keyframe.
 445 #define CODEC_FLAG_BITEXACT       0x00800000 ///< Use only bitexact stuff (except (I)DCT).
 446 /* Fx : Flag for h263+ extra options */
 447 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
 448 #define CODEC_FLAG_H263P_AIC      0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction (remove this)
 449 #endif
 450 #define CODEC_FLAG_AC_PRED        0x01000000 ///< H.263 advanced intra coding / MPEG-4 AC prediction
 451 #define CODEC_FLAG_H263P_UMV      0x02000000 ///< unlimited motion vector
 452 #define CODEC_FLAG_CBP_RD         0x04000000 ///< Use rate distortion optimization for cbp.
 453 #define CODEC_FLAG_QP_RD          0x08000000 ///< Use rate distortion optimization for qp selectioon.
 454 #define CODEC_FLAG_H263P_AIV      0x00000008 ///< H.263 alternative inter VLC
 455 #define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
 456 #define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
 457 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
 458 #define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
 459 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< Will reserve space for SVCD scan offset user data.
 460 #define CODEC_FLAG_CLOSED_GOP     0x80000000
 461 #define CODEC_FLAG2_FAST          0x00000001 ///< Allow non spec compliant speedup tricks.
 462 #define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< Strictly enforce GOP size.
 463 #define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< Skip bitstream encoding.
 464 #define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< Place global headers at every keyframe instead of in extradata.
 465 #define CODEC_FLAG2_BPYRAMID      0x00000010 ///< H.264 allow B-frames to be used as references.
 466 #define CODEC_FLAG2_WPRED         0x00000020 ///< H.264 weighted biprediction for B-frames
 467 #define CODEC_FLAG2_MIXED_REFS    0x00000040 ///< H.264 one reference per partition, as opposed to one reference per macroblock
 468 #define CODEC_FLAG2_8X8DCT        0x00000080 ///< H.264 high profile 8x8 transform
 469 #define CODEC_FLAG2_FASTPSKIP     0x00000100 ///< H.264 fast pskip
 470 #define CODEC_FLAG2_AUD           0x00000200 ///< H.264 access unit delimiters
 471 #define CODEC_FLAG2_BRDO          0x00000400 ///< B-frame rate-distortion optimization
 472 #define CODEC_FLAG2_INTRA_VLC     0x00000800 ///< Use MPEG-2 intra VLC table.
 473 #define CODEC_FLAG2_MEMC_ONLY     0x00001000 ///< Only do ME/MC (I frames -> ref, P frame -> ME+MC).
 474 #define CODEC_FLAG2_DROP_FRAME_TIMECODE 0x00002000 ///< timecode is in drop frame format.
 475 #define CODEC_FLAG2_SKIP_RD       0x00004000 ///< RD optimal MB level residual skipping
 476 #define CODEC_FLAG2_CHUNKS        0x00008000 ///< Input bitstream might be truncated at a packet boundaries instead of only at frame boundaries.
 477 #define CODEC_FLAG2_NON_LINEAR_QUANT 0x00010000 ///< Use MPEG-2 nonlinear quantizer.
 478 #define CODEC_FLAG2_BIT_RESERVOIR 0x00020000 ///< Use a bit reservoir when encoding if possible
 479
 480 /* Unsupported options :
 481  *              Syntax Arithmetic coding (SAC)
 482  *              Reference Picture Selection
 483  *              Independent Segment Decoding */
 484 /* /Fx */
 485 /* codec capabilities */
 486
 487 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< Decoder can use draw_horiz_band callback.
 488 /**
 489  * Codec uses get_buffer() for allocating buffers.
 490  * direct rendering method 1
 491  */
 492 #define CODEC_CAP_DR1             0x0002
 493 /* If 'parse_only' field is true, then avcodec_parse_frame() can be used. */
 494 #define CODEC_CAP_PARSE_ONLY      0x0004
 495 #define CODEC_CAP_TRUNCATED       0x0008
 496 /* Codec can export data for HW decoding (XvMC). */
 497 #define CODEC_CAP_HWACCEL         0x0010
 498 /**
 499  * Codec has a nonzero delay and needs to be fed with NULL at the end to get the delayed data.
 500  * If this is not set, the codec is guaranteed to never be fed with NULL data.
 501  */
 502 #define CODEC_CAP_DELAY           0x0020
 503 /**
 504  * Codec can be fed a final frame with a smaller size.
 505  * This can be used to prevent truncation of the last audio samples.
 506  */
 507 #define CODEC_CAP_SMALL_LAST_FRAME 0x0040
 508
 509 //The following defines may change, don't expect compatibility if you use them.
 510 #define MB_TYPE_INTRA4x4   0x0001
 511 #define MB_TYPE_INTRA16x16 0x0002 //FIXME H.264-specific
 512 #define MB_TYPE_INTRA_PCM  0x0004 //FIXME H.264-specific
 513 #define MB_TYPE_16x16      0x0008
 514 #define MB_TYPE_16x8       0x0010
 515 #define MB_TYPE_8x16       0x0020
 516 #define MB_TYPE_8x8        0x0040
 517 #define MB_TYPE_INTERLACED 0x0080
 518 #define MB_TYPE_DIRECT2    0x0100 //FIXME
 519 #define MB_TYPE_ACPRED     0x0200
 520 #define MB_TYPE_GMC        0x0400
 521 #define MB_TYPE_SKIP       0x0800
 522 #define MB_TYPE_P0L0       0x1000
 523 #define MB_TYPE_P1L0       0x2000
 524 #define MB_TYPE_P0L1       0x4000
 525 #define MB_TYPE_P1L1       0x8000
 526 #define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
 527 #define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
 528 #define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
 529 #define MB_TYPE_QUANT      0x00010000
 530 #define MB_TYPE_CBP        0x00020000
 531 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
 532
 533 /**
 534  * Pan Scan area.
 535  * This specifies the area which should be displayed.
 536  * Note there may be multiple such areas for one frame.
 537  */
 538 typedef struct AVPanScan{
 539     /**
 540      * id
 541      * - encoding: Set by user.
 542      * - decoding: Set by libavcodec.
 543      */
 544     int id;
 545
 546     /**
 547      * width and height in 1/16 pel
 548      * - encoding: Set by user.
 549      * - decoding: Set by libavcodec.
 550      */
 551     int width;
 552     int height;
 553
 554     /**
 555      * position of the top left corner in 1/16 pel for up to 3 fields/frames
 556      * - encoding: Set by user.
 557      * - decoding: Set by libavcodec.
 558      */
 559     int16_t position[3][2];
 560 }AVPanScan;
 561
 562 #define FF_COMMON_FRAME \
 563     /**\
 564      * pointer to the picture planes.\
 565      * This might be different from the first allocated byte\
 566      * - encoding: \
 567      * - decoding: \
 568      */\
 569     uint8_t *data[4];\
 570     int linesize[4];\
 571     /**\
 572      * pointer to the first allocated byte of the picture. Can be used in get_buffer/release_buffer.\
 573      * This isn't used by libavcodec unless the default get/release_buffer() is used.\
 574      * - encoding: \
 575      * - decoding: \
 576      */\
 577     uint8_t *base[4];\
 578     /**\
 579      * 1 -> keyframe, 0-> not\
 580      * - encoding: Set by libavcodec.\
 581      * - decoding: Set by libavcodec.\
 582      */\
 583     int key_frame;\
 584 \
 585     /**\
 586      * Picture type of the frame, see ?_TYPE below.\
 587      * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
 588      * - decoding: Set by libavcodec.\
 589      */\
 590     int pict_type;\
 591 \
 592     /**\
 593      * presentation timestamp in time_base units (time when frame should be shown to user)\
 594      * If AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed.\
 595      * - encoding: MUST be set by user.\
 596      * - decoding: Set by libavcodec.\
 597      */\
 598     int64_t pts;\
 599 \
 600     /**\
 601      * picture number in bitstream order\
 602      * - encoding: set by\
 603      * - decoding: Set by libavcodec.\
 604      */\
 605     int coded_picture_number;\
 606     /**\
 607      * picture number in display order\
 608      * - encoding: set by\
 609      * - decoding: Set by libavcodec.\
 610      */\
 611     int display_picture_number;\
 612 \
 613     /**\
 614      * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
 615      * - encoding: Set by libavcodec. for coded_picture (and set by user for input).\
 616      * - decoding: Set by libavcodec.\
 617      */\
 618     int quality; \
 619 \
 620     /**\
 621      * buffer age (1->was last buffer and dint change, 2->..., ...).\
 622      * Set to INT_MAX if the buffer has not been used yet.\
 623      * - encoding: unused\
 624      * - decoding: MUST be set by get_buffer().\
 625      */\
 626     int age;\
 627 \
 628     /**\
 629      * is this picture used as reference\
 630      * The values for this are the same as the MpegEncContext.picture_structure\
 631      * variable, that is 1->top field, 2->bottom field, 3->frame/both fields.\
 632      * - encoding: unused\
 633      * - decoding: Set by libavcodec. (before get_buffer() call)).\
 634      */\
 635     int reference;\
 636 \
 637     /**\
 638      * QP table\
 639      * - encoding: unused\
 640      * - decoding: Set by libavcodec.\
 641      */\
 642     int8_t *qscale_table;\
 643     /**\
 644      * QP store stride\
 645      * - encoding: unused\
 646      * - decoding: Set by libavcodec.\
 647      */\
 648     int qstride;\
 649 \
 650     /**\
 651      * mbskip_table[mb]>=1 if MB didn't change\
 652      * stride= mb_width = (width+15)>>4\
 653      * - encoding: unused\
 654      * - decoding: Set by libavcodec.\
 655      */\
 656     uint8_t *mbskip_table;\
 657 \
 658     /**\
 659      * motion vector table\
 660      * @code\
 661      * example:\
 662      * int mv_sample_log2= 4 - motion_subsample_log2;\
 663      * int mb_width= (width+15)>>4;\
 664      * int mv_stride= (mb_width << mv_sample_log2) + 1;\
 665      * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
 666      * @endcode\
 667      * - encoding: Set by user.\
 668      * - decoding: Set by libavcodec.\
 669      */\
 670     int16_t (*motion_val[2])[2];\
 671 \
 672     /**\
 673      * macroblock type table\
 674      * mb_type_base + mb_width + 2\
 675      * - encoding: Set by user.\
 676      * - decoding: Set by libavcodec.\
 677      */\
 678     uint32_t *mb_type;\
 679 \
 680     /**\
 681      * log2 of the size of the block which a single vector in motion_val represents: \
 682      * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
 683      * - encoding: unused\
 684      * - decoding: Set by libavcodec.\
 685      */\
 686     uint8_t motion_subsample_log2;\
 687 \
 688     /**\
 689      * for some private data of the user\
 690      * - encoding: unused\
 691      * - decoding: Set by user.\
 692      */\
 693     void *opaque;\
 694 \
 695     /**\
 696      * error\
 697      * - encoding: Set by libavcodec. if flags&CODEC_FLAG_PSNR.\
 698      * - decoding: unused\
 699      */\
 700     uint64_t error[4];\
 701 \
 702     /**\
 703      * type of the buffer (to keep track of who has to deallocate data[*])\
 704      * - encoding: Set by the one who allocates it.\
 705      * - decoding: Set by the one who allocates it.\
 706      * Note: User allocated (direct rendering) & internal buffers cannot coexist currently.\
 707      */\
 708     int type;\
 709     \
 710     /**\
 711      * When decoding, this signals how much the picture must be delayed.\
 712      * extra_delay = repeat_pict / (2*fps)\
 713      * - encoding: unused\
 714      * - decoding: Set by libavcodec.\
 715      */\
 716     int repeat_pict;\
 717     \
 718     /**\
 719      * \
 720      */\
 721     int qscale_type;\
 722     \
 723     /**\
 724      * The content of the picture is interlaced.\
 725      * - encoding: Set by user.\
 726      * - decoding: Set by libavcodec. (default 0)\
 727      */\
 728     int interlaced_frame;\
 729     \
 730     /**\
 731      * If the content is interlaced, is top field displayed first.\
 732      * - encoding: Set by user.\
 733      * - decoding: Set by libavcodec.\
 734      */\
 735     int top_field_first;\
 736     \
 737     /**\
 738      * Pan scan.\
 739      * - encoding: Set by user.\
 740      * - decoding: Set by libavcodec.\
 741      */\
 742     AVPanScan *pan_scan;\
 743     \
 744     /**\
 745      * Tell user application that palette has changed from previous frame.\
 746      * - encoding: ??? (no palette-enabled encoder yet)\
 747      * - decoding: Set by libavcodec. (default 0).\
 748      */\
 749     int palette_has_changed;\
 750     \
 751     /**\
 752      * codec suggestion on buffer type if != 0\
 753      * - encoding: unused\
 754      * - decoding: Set by libavcodec. (before get_buffer() call)).\
 755      */\
 756     int buffer_hints;\
 757 \
 758     /**\
 759      * DCT coefficients\
 760      * - encoding: unused\
 761      * - decoding: Set by libavcodec.\
 762      */\
 763     short *dct_coeff;\
 764 \
 765     /**\
 766      * motion referece frame index\
 767      * - encoding: Set by user.\
 768      * - decoding: Set by libavcodec.\
 769      */\
 770     int8_t *ref_index[2];\
 771 \
 772     /**\
 773      * reordered opaque 64bit number (generally a PTS) from AVCodecContext.reordered_opaque\
 774      * output in AVFrame.reordered_opaque\
 775      * - encoding: unused\
 776      * - decoding: Read by user.\
 777      */\
 778     int64_t reordered_opaque;\
 779
 780
 781 #define FF_QSCALE_TYPE_MPEG1 0
 782 #define FF_QSCALE_TYPE_MPEG2 1
 783 #define FF_QSCALE_TYPE_H264  2
 784
 785 #define FF_BUFFER_TYPE_INTERNAL 1
 786 #define FF_BUFFER_TYPE_USER     2 ///< direct rendering buffers (image is (de)allocated by user)
 787 #define FF_BUFFER_TYPE_SHARED   4 ///< Buffer from somewhere else; don't deallocate image (data/base), all other tables are not shared.
 788 #define FF_BUFFER_TYPE_COPY     8 ///< Just a (modified) copy of some other buffer, don't deallocate anything.
 789
 790
 791 #define FF_I_TYPE  1 ///< Intra
 792 #define FF_P_TYPE  2 ///< Predicted
 793 #define FF_B_TYPE  3 ///< Bi-dir predicted
 794 #define FF_S_TYPE  4 ///< S(GMC)-VOP MPEG4
 795 #define FF_SI_TYPE 5 ///< Switching Intra
 796 #define FF_SP_TYPE 6 ///< Switching Predicted
 797 #define FF_BI_TYPE 7
 798
 799 #define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore).
 800 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer.
 801 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content.
 802 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update).
 803
 804 /**
 805  * Audio Video Frame.
 806  * New fields can be added to the end of FF_COMMON_FRAME with minor version
 807  * bumps.
 808  * Removal, reordering and changes to existing fields require a major
 809  * version bump. No fields should be added into AVFrame before or after
 810  * FF_COMMON_FRAME!
 811  * sizeof(AVFrame) must not be used outside libav*.
 812  */
 813 typedef struct AVFrame {
 814     FF_COMMON_FRAME
 815 } AVFrame;
 816
 817 #define DEFAULT_FRAME_RATE_BASE 1001000
 818
 819 /**
 820  * main external API structure.
 821  * New fields can be added to the end with minor version bumps.
 822  * Removal, reordering and changes to existing fields require a major
 823  * version bump.
 824  * sizeof(AVCodecContext) must not be used outside libav*.
 825  */
 826 typedef struct AVCodecContext {
 827     /**
 828      * information on struct for av_log
 829      * - set by avcodec_alloc_context
 830      */
 831     const AVClass *av_class;
 832     /**
 833      * the average bitrate
 834      * - encoding: Set by user; unused for constant quantizer encoding.
 835      * - decoding: Set by libavcodec. 0 or some bitrate if this info is available in the stream.
 836      */
 837     int bit_rate;
 838
 839     /**
 840      * number of bits the bitstream is allowed to diverge from the reference.
 841      *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
 842      * - encoding: Set by user; unused for constant quantizer encoding.
 843      * - decoding: unused
 844      */
 845     int bit_rate_tolerance;
 846
 847     /**
 848      * CODEC_FLAG_*.
 849      * - encoding: Set by user.
 850      * - decoding: Set by user.
 851      */
 852     int flags;
 853
 854     /**
 855      * Some codecs need additional format info. It is stored here.
 856      * If any muxer uses this then ALL demuxers/parsers AND encoders for the
 857      * specific codec MUST set it correctly otherwise stream copy breaks.
 858      * In general use of this field by muxers is not recommanded.
 859      * - encoding: Set by libavcodec.
 860      * - decoding: Set by libavcodec. (FIXME: Is this OK?)
 861      */
 862     int sub_id;
 863
 864     /**
 865      * Motion estimation algorithm used for video coding.
 866      * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
 867      * 8 (umh), 9 (iter), 10 (tesa) [7, 8, 10 are x264 specific, 9 is snow specific]
 868      * - encoding: MUST be set by user.
 869      * - decoding: unused
 870      */
 871     int me_method;
 872
 873     /**
 874      * some codecs need / can use extradata like Huffman tables.
 875      * mjpeg: Huffman tables
 876      * rv10: additional flags
 877      * mpeg4: global headers (they can be in the bitstream or here)
 878      * The allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
 879      * than extradata_size to avoid prolems if it is read with the bitstream reader.
 880      * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
 881      * - encoding: Set/allocated/freed by libavcodec.
 882      * - decoding: Set/allocated/freed by user.
 883      */
 884     uint8_t *extradata;
 885     int extradata_size;
 886
 887     /**
 888      * This is the fundamental unit of time (in seconds) in terms
 889      * of which frame timestamps are represented. For fixed-fps content,
 890      * timebase should be 1/framerate and timestamp increments should be
 891      * identically 1.
 892      * - encoding: MUST be set by user.
 893      * - decoding: Set by libavcodec.
 894      */
 895     AVRational time_base;
 896
 897     /* video only */
 898     /**
 899      * picture width / height.
 900      * - encoding: MUST be set by user.
 901      * - decoding: Set by libavcodec.
 902      * Note: For compatibility it is possible to set this instead of
 903      * coded_width/height before decoding.
 904      */
 905     int width, height;
 906
 907 #define FF_ASPECT_EXTENDED 15
 908
 909     /**
 910      * the number of pictures in a group of pictures, or 0 for intra_only
 911      * - encoding: Set by user.
 912      * - decoding: unused
 913      */
 914     int gop_size;
 915
 916     /**
 917      * Pixel format, see PIX_FMT_xxx.
 918      * - encoding: Set by user.
 919      * - decoding: Set by libavcodec.
 920      */
 921     enum PixelFormat pix_fmt;
 922
 923     /**
 924      * Frame rate emulation. If not zero, the lower layer (i.e. format handler)
 925      * has to read frames at native frame rate.
 926      * - encoding: Set by user.
 927      * - decoding: unused
 928      */
 929     int rate_emu;
 930
 931     /**
 932      * If non NULL, 'draw_horiz_band' is called by the libavcodec
 933      * decoder to draw a horizontal band. It improves cache usage. Not
 934      * all codecs can do that. You must check the codec capabilities
 935      * beforehand.
 936      * - encoding: unused
 937      * - decoding: Set by user.
 938      * @param height the height of the slice
 939      * @param y the y position of the slice
 940      * @param type 1->top field, 2->bottom field, 3->frame
 941      * @param offset offset into the AVFrame.data from which the slice should be read
 942      */
 943     void (*draw_horiz_band)(struct AVCodecContext *s,
 944                             const AVFrame *src, int offset[4],
 945                             int y, int type, int height);
 946
 947     /* audio only */
 948     int sample_rate; ///< samples per second
 949     int channels;    ///< number of audio channels
 950
 951     /**
 952      * audio sample format
 953      * - encoding: Set by user.
 954      * - decoding: Set by libavcodec.
 955      */
 956     enum SampleFormat sample_fmt;  ///< sample format, currently unused
 957
 958     /* The following data should not be initialized. */
 959     /**
 960      * Samples per packet, initialized when calling 'init'.
 961      */
 962     int frame_size;
 963     int frame_number;   ///< audio or video frame number
 964     int real_pict_num;  ///< Returns the real picture number of previous encoded frame.
 965
 966     /**
 967      * Number of frames the decoded output will be delayed relative to
 968      * the encoded input.
 969      * - encoding: Set by libavcodec.
 970      * - decoding: unused
 971      */
 972     int delay;
 973
 974     /* - encoding parameters */
 975     float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
 976     float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
 977
 978     /**
 979      * minimum quantizer
 980      * - encoding: Set by user.
 981      * - decoding: unused
 982      */
 983     int qmin;
 984
 985     /**
 986      * maximum quantizer
 987      * - encoding: Set by user.
 988      * - decoding: unused
 989      */
 990     int qmax;
 991
 992     /**
 993      * maximum quantizer difference between frames
 994      * - encoding: Set by user.
 995      * - decoding: unused
 996      */
 997     int max_qdiff;
 998
 999     /**
1000      * maximum number of B-frames between non-B-frames
1001      * Note: The output will be delayed by max_b_frames+1 relative to the input.
1002      * - encoding: Set by user.
1003      * - decoding: unused
1004      */
1005     int max_b_frames;
1006
1007     /**
1008      * qscale factor between IP and B-frames
1009      * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1010      * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1011      * - encoding: Set by user.
1012      * - decoding: unused
1013      */
1014     float b_quant_factor;
1015
1016     /** obsolete FIXME remove */
1017     int rc_strategy;
1018 #define FF_RC_STRATEGY_XVID 1
1019
1020     int b_frame_strategy;
1021
1022     /**
1023      * hurry up amount
1024      * - encoding: unused
1025      * - decoding: Set by user. 1-> Skip B-frames, 2-> Skip IDCT/dequant too, 5-> Skip everything except header
1026      * @deprecated Deprecated in favor of skip_idct and skip_frame.
1027      */
1028     int hurry_up;
1029
1030     struct AVCodec *codec;
1031
1032     void *priv_data;
1033
1034 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
1035     /* unused, FIXME remove*/
1036     int rtp_mode;
1037 #endif
1038
1039     int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
1040                             /* do its best to deliver a chunk with size     */
1041                             /* below rtp_payload_size, the chunk will start */
1042                             /* with a start code on some codecs like H.263. */
1043                             /* This doesn't take account of any particular  */
1044                             /* headers inside the transmitted RTP payload.  */
1045
1046
1047     /* The RTP callback: This function is called    */
1048     /* every time the encoder has a packet to send. */
1049     /* It depends on the encoder if the data starts */
1050     /* with a Start Code (it should). H.263 does.   */
1051     /* mb_nb contains the number of macroblocks     */
1052     /* encoded in the RTP payload.                  */
1053     void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
1054
1055     /* statistics, used for 2-pass encoding */
1056     int mv_bits;
1057     int header_bits;
1058     int i_tex_bits;
1059     int p_tex_bits;
1060     int i_count;
1061     int p_count;
1062     int skip_count;
1063     int misc_bits;
1064
1065     /**
1066      * number of bits used for the previously encoded frame
1067      * - encoding: Set by libavcodec.
1068      * - decoding: unused
1069      */
1070     int frame_bits;
1071
1072     /**
1073      * Private data of the user, can be used to carry app specific stuff.
1074      * - encoding: Set by user.
1075      * - decoding: Set by user.
1076      */
1077     void *opaque;
1078
1079     char codec_name[32];
1080     enum CodecType codec_type; /* see CODEC_TYPE_xxx */
1081     enum CodecID codec_id; /* see CODEC_ID_xxx */
1082
1083     /**
1084      * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1085      * This is used to work around some encoder bugs.
1086      * A demuxer should set this to what is stored in the field used to identify the codec.
1087      * If there are multiple such fields in a container then the demuxer should choose the one
1088      * which maximizes the information about the used codec.
1089      * If the codec tag field in a container is larger then 32 bits then the demuxer should
1090      * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1091      * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1092      * first.
1093      * - encoding: Set by user, if not then the default based on codec_id will be used.
1094      * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1095      */
1096     unsigned int codec_tag;
1097
1098     /**
1099      * Work around bugs in encoders which sometimes cannot be detected automatically.
1100      * - encoding: Set by user
1101      * - decoding: Set by user
1102      */
1103     int workaround_bugs;
1104 #define FF_BUG_AUTODETECT       1  ///< autodetection
1105 #define FF_BUG_OLD_MSMPEG4      2
1106 #define FF_BUG_XVID_ILACE       4
1107 #define FF_BUG_UMP4             8
1108 #define FF_BUG_NO_PADDING       16
1109 #define FF_BUG_AMV              32
1110 #define FF_BUG_AC_VLC           0  ///< Will be removed, libavcodec can now handle these non-compliant files by default.
1111 #define FF_BUG_QPEL_CHROMA      64
1112 #define FF_BUG_STD_QPEL         128
1113 #define FF_BUG_QPEL_CHROMA2     256
1114 #define FF_BUG_DIRECT_BLOCKSIZE 512
1115 #define FF_BUG_EDGE             1024
1116 #define FF_BUG_HPEL_CHROMA      2048
1117 #define FF_BUG_DC_CLIP          4096
1118 #define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
1119 //#define FF_BUG_FAKE_SCALABILITY 16 //Autodetection should work 100%.
1120
1121     /**
1122      * luma single coefficient elimination threshold
1123      * - encoding: Set by user.
1124      * - decoding: unused
1125      */
1126     int luma_elim_threshold;
1127
1128     /**
1129      * chroma single coeff elimination threshold
1130      * - encoding: Set by user.
1131      * - decoding: unused
1132      */
1133     int chroma_elim_threshold;
1134
1135     /**
1136      * strictly follow the standard (MPEG4, ...).
1137      * - encoding: Set by user.
1138      * - decoding: Set by user.
1139      * Setting this to STRICT or higher means the encoder and decoder will
1140      * generally do stupid things. While setting it to inofficial or lower
1141      * will mean the encoder might use things that are not supported by all
1142      * spec compliant decoders. Decoders make no difference between normal,
1143      * inofficial and experimental, that is they always try to decode things
1144      * when they can unless they are explicitly asked to behave stupid
1145      * (=strictly conform to the specs)
1146      */
1147     int strict_std_compliance;
1148 #define FF_COMPLIANCE_VERY_STRICT   2 ///< Strictly conform to a older more strict version of the spec or reference software.
1149 #define FF_COMPLIANCE_STRICT        1 ///< Strictly conform to all the things in the spec no matter what consequences.
1150 #define FF_COMPLIANCE_NORMAL        0
1151 #define FF_COMPLIANCE_INOFFICIAL   -1 ///< Allow inofficial extensions.
1152 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
1153
1154     /**
1155      * qscale offset between IP and B-frames
1156      * - encoding: Set by user.
1157      * - decoding: unused
1158      */
1159     float b_quant_offset;
1160
1161     /**
1162      * Error resilience; higher values will detect more errors but may
1163      * misdetect some more or less valid parts as errors.
1164      * - encoding: unused
1165      * - decoding: Set by user.
1166      */
1167     int error_resilience;
1168 #define FF_ER_CAREFUL         1
1169 #define FF_ER_COMPLIANT       2
1170 #define FF_ER_AGGRESSIVE      3
1171 #define FF_ER_VERY_AGGRESSIVE 4
1172
1173     /**
1174      * Called at the beginning of each frame to get a buffer for it.
1175      * If pic.reference is set then the frame will be read later by libavcodec.
1176      * avcodec_align_dimensions() should be used to find the required width and
1177      * height, as they normally need to be rounded up to the next multiple of 16.
1178      * - encoding: unused
1179      * - decoding: Set by libavcodec., user can override.
1180      */
1181     int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1182
1183     /**
1184      * Called to release buffers which were allocated with get_buffer.
1185      * A released buffer can be reused in get_buffer().
1186      * pic.data[*] must be set to NULL.
1187      * - encoding: unused
1188      * - decoding: Set by libavcodec., user can override.
1189      */
1190     void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1191
1192     /**
1193      * If 1 the stream has a 1 frame delay during decoding.
1194      * - encoding: Set by libavcodec.
1195      * - decoding: Set by libavcodec.
1196      */
1197     int has_b_frames;
1198
1199     /**
1200      * number of bytes per packet if constant and known or 0
1201      * Used by some WAV based audio codecs.
1202      */
1203     int block_align;
1204
1205     int parse_only; /* - decoding only: If true, only parsing is done
1206                        (function avcodec_parse_frame()). The frame
1207                        data is returned. Only MPEG codecs support this now. */
1208
1209     /**
1210      * 0-> h263 quant 1-> mpeg quant
1211      * - encoding: Set by user.
1212      * - decoding: unused
1213      */
1214     int mpeg_quant;
1215
1216     /**
1217      * pass1 encoding statistics output buffer
1218      * - encoding: Set by libavcodec.
1219      * - decoding: unused
1220      */
1221     char *stats_out;
1222
1223     /**
1224      * pass2 encoding statistics input buffer
1225      * Concatenated stuff from stats_out of pass1 should be placed here.
1226      * - encoding: Allocated/set/freed by user.
1227      * - decoding: unused
1228      */
1229     char *stats_in;
1230
1231     /**
1232      * ratecontrol qmin qmax limiting method
1233      * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax.
1234      * - encoding: Set by user.
1235      * - decoding: unused
1236      */
1237     float rc_qsquish;
1238
1239     float rc_qmod_amp;
1240     int rc_qmod_freq;
1241
1242     /**
1243      * ratecontrol override, see RcOverride
1244      * - encoding: Allocated/set/freed by user.
1245      * - decoding: unused
1246      */
1247     RcOverride *rc_override;
1248     int rc_override_count;
1249
1250     /**
1251      * rate control equation
1252      * - encoding: Set by user
1253      * - decoding: unused
1254      */
1255     const char *rc_eq;
1256
1257     /**
1258      * maximum bitrate
1259      * - encoding: Set by user.
1260      * - decoding: unused
1261      */
1262     int rc_max_rate;
1263
1264     /**
1265      * minimum bitrate
1266      * - encoding: Set by user.
1267      * - decoding: unused
1268      */
1269     int rc_min_rate;
1270
1271     /**
1272      * decoder bitstream buffer size
1273      * - encoding: Set by user.
1274      * - decoding: unused
1275      */
1276     int rc_buffer_size;
1277     float rc_buffer_aggressivity;
1278
1279     /**
1280      * qscale factor between P and I-frames
1281      * If > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset).
1282      * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1283      * - encoding: Set by user.
1284      * - decoding: unused
1285      */
1286     float i_quant_factor;
1287
1288     /**
1289      * qscale offset between P and I-frames
1290      * - encoding: Set by user.
1291      * - decoding: unused
1292      */
1293     float i_quant_offset;
1294
1295     /**
1296      * initial complexity for pass1 ratecontrol
1297      * - encoding: Set by user.
1298      * - decoding: unused
1299      */
1300     float rc_initial_cplx;
1301
1302     /**
1303      * DCT algorithm, see FF_DCT_* below
1304      * - encoding: Set by user.
1305      * - decoding: unused
1306      */
1307     int dct_algo;
1308 #define FF_DCT_AUTO    0
1309 #define FF_DCT_FASTINT 1
1310 #define FF_DCT_INT     2
1311 #define FF_DCT_MMX     3
1312 #define FF_DCT_MLIB    4
1313 #define FF_DCT_ALTIVEC 5
1314 #define FF_DCT_FAAN    6
1315
1316     /**
1317      * luminance masking (0-> disabled)
1318      * - encoding: Set by user.
1319      * - decoding: unused
1320      */
1321     float lumi_masking;
1322
1323     /**
1324      * temporary complexity masking (0-> disabled)
1325      * - encoding: Set by user.
1326      * - decoding: unused
1327      */
1328     float temporal_cplx_masking;
1329
1330     /**
1331      * spatial complexity masking (0-> disabled)
1332      * - encoding: Set by user.
1333      * - decoding: unused
1334      */
1335     float spatial_cplx_masking;
1336
1337     /**
1338      * p block masking (0-> disabled)
1339      * - encoding: Set by user.
1340      * - decoding: unused
1341      */
1342     float p_masking;
1343
1344     /**
1345      * darkness masking (0-> disabled)
1346      * - encoding: Set by user.
1347      * - decoding: unused
1348      */
1349     float dark_masking;
1350
1351
1352 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
1353     /* for binary compatibility */
1354     int unused;
1355 #endif
1356
1357     /**
1358      * IDCT algorithm, see FF_IDCT_* below.
1359      * - encoding: Set by user.
1360      * - decoding: Set by user.
1361      */
1362     int idct_algo;
1363 #define FF_IDCT_AUTO          0
1364 #define FF_IDCT_INT           1
1365 #define FF_IDCT_SIMPLE        2
1366 #define FF_IDCT_SIMPLEMMX     3
1367 #define FF_IDCT_LIBMPEG2MMX   4
1368 #define FF_IDCT_PS2           5
1369 #define FF_IDCT_MLIB          6
1370 #define FF_IDCT_ARM           7
1371 #define FF_IDCT_ALTIVEC       8
1372 #define FF_IDCT_SH4           9
1373 #define FF_IDCT_SIMPLEARM     10
1374 #define FF_IDCT_H264          11
1375 #define FF_IDCT_VP3           12
1376 #define FF_IDCT_IPP           13
1377 #define FF_IDCT_XVIDMMX       14
1378 #define FF_IDCT_CAVS          15
1379 #define FF_IDCT_SIMPLEARMV5TE 16
1380 #define FF_IDCT_SIMPLEARMV6   17
1381 #define FF_IDCT_SIMPLEVIS     18
1382 #define FF_IDCT_WMV2          19
1383 #define FF_IDCT_FAAN          20
1384
1385     /**
1386      * slice count
1387      * - encoding: Set by libavcodec.
1388      * - decoding: Set by user (or 0).
1389      */
1390     int slice_count;
1391     /**
1392      * slice offsets in the frame in bytes
1393      * - encoding: Set/allocated by libavcodec.
1394      * - decoding: Set/allocated by user (or NULL).
1395      */
1396     int *slice_offset;
1397
1398     /**
1399      * error concealment flags
1400      * - encoding: unused
1401      * - decoding: Set by user.
1402      */
1403     int error_concealment;
1404 #define FF_EC_GUESS_MVS   1
1405 #define FF_EC_DEBLOCK     2
1406
1407     /**
1408      * dsp_mask could be add used to disable unwanted CPU features
1409      * CPU features (i.e. MMX, SSE. ...)
1410      *
1411      * With the FORCE flag you may instead enable given CPU features.
1412      * (Dangerous: Usable in case of misdetection, improper usage however will
1413      * result into program crash.)
1414      */
1415     unsigned dsp_mask;
1416 #define FF_MM_FORCE    0x80000000 /* Force usage of selected flags (OR) */
1417     /* lower 16 bits - CPU features */
1418 #define FF_MM_MMX      0x0001 ///< standard MMX
1419 #define FF_MM_3DNOW    0x0004 ///< AMD 3DNOW
1420 #define FF_MM_MMXEXT   0x0002 ///< SSE integer functions or AMD MMX ext
1421 #define FF_MM_SSE      0x0008 ///< SSE functions
1422 #define FF_MM_SSE2     0x0010 ///< PIV SSE2 functions
1423 #define FF_MM_3DNOWEXT 0x0020 ///< AMD 3DNowExt
1424 #define FF_MM_SSE3     0x0040 ///< Prescott SSE3 functions
1425 #define FF_MM_SSSE3    0x0080 ///< Conroe SSSE3 functions
1426 #define FF_MM_IWMMXT   0x0100 ///< XScale IWMMXT
1427
1428     /**
1429      * bits per sample/pixel from the demuxer (needed for huffyuv).
1430      * - encoding: Set by libavcodec.
1431      * - decoding: Set by user.
1432      */
1433 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
1434      int bits_per_sample;
1435 #else
1436      int bits_per_coded_sample;
1437 #endif
1438
1439     /**
1440      * prediction method (needed for huffyuv)
1441      * - encoding: Set by user.
1442      * - decoding: unused
1443      */
1444      int prediction_method;
1445 #define FF_PRED_LEFT   0
1446 #define FF_PRED_PLANE  1
1447 #define FF_PRED_MEDIAN 2
1448
1449     /**
1450      * sample aspect ratio (0 if unknown)
1451      * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1452      * - encoding: Set by user.
1453      * - decoding: Set by libavcodec.
1454      */
1455     AVRational sample_aspect_ratio;
1456
1457     /**
1458      * the picture in the bitstream
1459      * - encoding: Set by libavcodec.
1460      * - decoding: Set by libavcodec.
1461      */
1462     AVFrame *coded_frame;
1463
1464     /**
1465      * debug
1466      * - encoding: Set by user.
1467      * - decoding: Set by user.
1468      */
1469     int debug;
1470 #define FF_DEBUG_PICT_INFO   1
1471 #define FF_DEBUG_RC          2
1472 #define FF_DEBUG_BITSTREAM   4
1473 #define FF_DEBUG_MB_TYPE     8
1474 #define FF_DEBUG_QP          16
1475 #define FF_DEBUG_MV          32
1476 #define FF_DEBUG_DCT_COEFF   0x00000040
1477 #define FF_DEBUG_SKIP        0x00000080
1478 #define FF_DEBUG_STARTCODE   0x00000100
1479 #define FF_DEBUG_PTS         0x00000200
1480 #define FF_DEBUG_ER          0x00000400
1481 #define FF_DEBUG_MMCO        0x00000800
1482 #define FF_DEBUG_BUGS        0x00001000
1483 #define FF_DEBUG_VIS_QP      0x00002000
1484 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1485 #define FF_DEBUG_BUFFERS     0x00008000
1486
1487     /**
1488      * debug
1489      * - encoding: Set by user.
1490      * - decoding: Set by user.
1491      */
1492     int debug_mv;
1493 #define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1494 #define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1495 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1496
1497     /**
1498      * error
1499      * - encoding: Set by libavcodec if flags&CODEC_FLAG_PSNR.
1500      * - decoding: unused
1501      */
1502     uint64_t error[4];
1503
1504     /**
1505      * minimum MB quantizer
1506      * - encoding: unused
1507      * - decoding: unused
1508      */
1509     int mb_qmin;
1510
1511     /**
1512      * maximum MB quantizer
1513      * - encoding: unused
1514      * - decoding: unused
1515      */
1516     int mb_qmax;
1517
1518     /**
1519      * motion estimation comparison function
1520      * - encoding: Set by user.
1521      * - decoding: unused
1522      */
1523     int me_cmp;
1524     /**
1525      * subpixel motion estimation comparison function
1526      * - encoding: Set by user.
1527      * - decoding: unused
1528      */
1529     int me_sub_cmp;
1530     /**
1531      * macroblock comparison function (not supported yet)
1532      * - encoding: Set by user.
1533      * - decoding: unused
1534      */
1535     int mb_cmp;
1536     /**
1537      * interlaced DCT comparison function
1538      * - encoding: Set by user.
1539      * - decoding: unused
1540      */
1541     int ildct_cmp;
1542 #define FF_CMP_SAD    0
1543 #define FF_CMP_SSE    1
1544 #define FF_CMP_SATD   2
1545 #define FF_CMP_DCT    3
1546 #define FF_CMP_PSNR   4
1547 #define FF_CMP_BIT    5
1548 #define FF_CMP_RD     6
1549 #define FF_CMP_ZERO   7
1550 #define FF_CMP_VSAD   8
1551 #define FF_CMP_VSSE   9
1552 #define FF_CMP_NSSE   10
1553 #define FF_CMP_W53    11
1554 #define FF_CMP_W97    12
1555 #define FF_CMP_DCTMAX 13
1556 #define FF_CMP_DCT264 14
1557 #define FF_CMP_CHROMA 256
1558
1559     /**
1560      * ME diamond size & shape
1561      * - encoding: Set by user.
1562      * - decoding: unused
1563      */
1564     int dia_size;
1565
1566     /**
1567      * amount of previous MV predictors (2a+1 x 2a+1 square)
1568      * - encoding: Set by user.
1569      * - decoding: unused
1570      */
1571     int last_predictor_count;
1572
1573     /**
1574      * prepass for motion estimation
1575      * - encoding: Set by user.
1576      * - decoding: unused
1577      */
1578     int pre_me;
1579
1580     /**
1581      * motion estimation prepass comparison function
1582      * - encoding: Set by user.
1583      * - decoding: unused
1584      */
1585     int me_pre_cmp;
1586
1587     /**
1588      * ME prepass diamond size & shape
1589      * - encoding: Set by user.
1590      * - decoding: unused
1591      */
1592     int pre_dia_size;
1593
1594     /**
1595      * subpel ME quality
1596      * - encoding: Set by user.
1597      * - decoding: unused
1598      */
1599     int me_subpel_quality;
1600
1601     /**
1602      * callback to negotiate the pixelFormat
1603      * @param fmt is the list of formats which are supported by the codec,
1604      * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1605      * The first is always the native one.
1606      * @return the chosen format
1607      * - encoding: unused
1608      * - decoding: Set by user, if not set the native format will be chosen.
1609      */
1610     enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1611
1612     /**
1613      * DTG active format information (additional aspect ratio
1614      * information only used in DVB MPEG-2 transport streams)
1615      * 0 if not set.
1616      *
1617      * - encoding: unused
1618      * - decoding: Set by decoder.
1619      */
1620     int dtg_active_format;
1621 #define FF_DTG_AFD_SAME         8
1622 #define FF_DTG_AFD_4_3          9
1623 #define FF_DTG_AFD_16_9         10
1624 #define FF_DTG_AFD_14_9         11
1625 #define FF_DTG_AFD_4_3_SP_14_9  13
1626 #define FF_DTG_AFD_16_9_SP_14_9 14
1627 #define FF_DTG_AFD_SP_4_3       15
1628
1629     /**
1630      * maximum motion estimation search range in subpel units
1631      * If 0 then no limit.
1632      *
1633      * - encoding: Set by user.
1634      * - decoding: unused
1635      */
1636     int me_range;
1637
1638     /**
1639      * intra quantizer bias
1640      * - encoding: Set by user.
1641      * - decoding: unused
1642      */
1643     int intra_quant_bias;
1644 #define FF_DEFAULT_QUANT_BIAS 999999
1645
1646     /**
1647      * inter quantizer bias
1648      * - encoding: Set by user.
1649      * - decoding: unused
1650      */
1651     int inter_quant_bias;
1652
1653     /**
1654      * color table ID
1655      * - encoding: unused
1656      * - decoding: Which clrtable should be used for 8bit RGB images.
1657      *             Tables have to be stored somewhere. FIXME
1658      */
1659     int color_table_id;
1660
1661     /**
1662      * internal_buffer count
1663      * Don't touch, used by libavcodec default_get_buffer().
1664      */
1665     int internal_buffer_count;
1666
1667     /**
1668      * internal_buffers
1669      * Don't touch, used by libavcodec default_get_buffer().
1670      */
1671     void *internal_buffer;
1672
1673 #define FF_LAMBDA_SHIFT 7
1674 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1675 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1676 #define FF_LAMBDA_MAX (256*128-1)
1677
1678 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1679     /**
1680      * Global quality for codecs which cannot change it per frame.
1681      * This should be proportional to MPEG-1/2/4 qscale.
1682      * - encoding: Set by user.
1683      * - decoding: unused
1684      */
1685     int global_quality;
1686
1687 #define FF_CODER_TYPE_VLC       0
1688 #define FF_CODER_TYPE_AC        1
1689 #define FF_CODER_TYPE_RAW       2
1690 #define FF_CODER_TYPE_RLE       3
1691 #define FF_CODER_TYPE_DEFLATE   4
1692     /**
1693      * coder type
1694      * - encoding: Set by user.
1695      * - decoding: unused
1696      */
1697     int coder_type;
1698
1699     /**
1700      * context model
1701      * - encoding: Set by user.
1702      * - decoding: unused
1703      */
1704     int context_model;
1705 #if 0
1706     /**
1707      *
1708      * - encoding: unused
1709      * - decoding: Set by user.
1710      */
1711     uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1712 #endif
1713
1714     /**
1715      * slice flags
1716      * - encoding: unused
1717      * - decoding: Set by user.
1718      */
1719     int slice_flags;
1720 #define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1721 #define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1722 #define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1723
1724     /**
1725      * XVideo Motion Acceleration
1726      * - encoding: forbidden
1727      * - decoding: set by decoder
1728      */
1729     int xvmc_acceleration;
1730
1731     /**
1732      * macroblock decision mode
1733      * - encoding: Set by user.
1734      * - decoding: unused
1735      */
1736     int mb_decision;
1737 #define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1738 #define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1739 #define FF_MB_DECISION_RD     2        ///< rate distortion
1740
1741     /**
1742      * custom intra quantization matrix
1743      * - encoding: Set by user, can be NULL.
1744      * - decoding: Set by libavcodec.
1745      */
1746     uint16_t *intra_matrix;
1747
1748     /**
1749      * custom inter quantization matrix
1750      * - encoding: Set by user, can be NULL.
1751      * - decoding: Set by libavcodec.
1752      */
1753     uint16_t *inter_matrix;
1754
1755     /**
1756      * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1757      * This is used to work around some encoder bugs.
1758      * - encoding: unused
1759      * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1760      */
1761     unsigned int stream_codec_tag;
1762
1763     /**
1764      * scene change detection threshold
1765      * 0 is default, larger means fewer detected scene changes.
1766      * - encoding: Set by user.
1767      * - decoding: unused
1768      */
1769     int scenechange_threshold;
1770
1771     /**
1772      * minimum Lagrange multipler
1773      * - encoding: Set by user.
1774      * - decoding: unused
1775      */
1776     int lmin;
1777
1778     /**
1779      * maximum Lagrange multipler
1780      * - encoding: Set by user.
1781      * - decoding: unused
1782      */
1783     int lmax;
1784
1785     /**
1786      * palette control structure
1787      * - encoding: ??? (no palette-enabled encoder yet)
1788      * - decoding: Set by user.
1789      */
1790     struct AVPaletteControl *palctrl;
1791
1792     /**
1793      * noise reduction strength
1794      * - encoding: Set by user.
1795      * - decoding: unused
1796      */
1797     int noise_reduction;
1798
1799     /**
1800      * Called at the beginning of a frame to get cr buffer for it.
1801      * Buffer type (size, hints) must be the same. libavcodec won't check it.
1802      * libavcodec will pass previous buffer in pic, function should return
1803      * same buffer or new buffer with old frame "painted" into it.
1804      * If pic.data[0] == NULL must behave like get_buffer().
1805      * - encoding: unused
1806      * - decoding: Set by libavcodec., user can override
1807      */
1808     int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1809
1810     /**
1811      * Number of bits which should be loaded into the rc buffer before decoding starts.
1812      * - encoding: Set by user.
1813      * - decoding: unused
1814      */
1815     int rc_initial_buffer_occupancy;
1816
1817     /**
1818      *
1819      * - encoding: Set by user.
1820      * - decoding: unused
1821      */
1822     int inter_threshold;
1823
1824     /**
1825      * CODEC_FLAG2_*
1826      * - encoding: Set by user.
1827      * - decoding: Set by user.
1828      */
1829     int flags2;
1830
1831     /**
1832      * Simulates errors in the bitstream to test error concealment.
1833      * - encoding: Set by user.
1834      * - decoding: unused
1835      */
1836     int error_rate;
1837
1838     /**
1839      * MP3 antialias algorithm, see FF_AA_* below.
1840      * - encoding: unused
1841      * - decoding: Set by user.
1842      */
1843     int antialias_algo;
1844 #define FF_AA_AUTO    0
1845 #define FF_AA_FASTINT 1 //not implemented yet
1846 #define FF_AA_INT     2
1847 #define FF_AA_FLOAT   3
1848     /**
1849      * quantizer noise shaping
1850      * - encoding: Set by user.
1851      * - decoding: unused
1852      */
1853     int quantizer_noise_shaping;
1854
1855     /**
1856      * thread count
1857      * is used to decide how many independent tasks should be passed to execute()
1858      * - encoding: Set by user.
1859      * - decoding: Set by user.
1860      */
1861     int thread_count;
1862
1863     /**
1864      * The codec may call this to execute several independent things.
1865      * It will return only after finishing all tasks.
1866      * The user may replace this with some multithreaded implementation,
1867      * the default implementation will execute the parts serially.
1868      * @param count the number of things to execute
1869      * - encoding: Set by libavcodec, user can override.
1870      * - decoding: Set by libavcodec, user can override.
1871      */
1872     int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1873
1874     /**
1875      * thread opaque
1876      * Can be used by execute() to store some per AVCodecContext stuff.
1877      * - encoding: set by execute()
1878      * - decoding: set by execute()
1879      */
1880     void *thread_opaque;
1881
1882     /**
1883      * Motion estimation threshold below which no motion estimation is
1884      * performed, but instead the user specified motion vectors are used.
1885      *
1886      * - encoding: Set by user.
1887      * - decoding: unused
1888      */
1889      int me_threshold;
1890
1891     /**
1892      * Macroblock threshold below which the user specified macroblock types will be used.
1893      * - encoding: Set by user.
1894      * - decoding: unused
1895      */
1896      int mb_threshold;
1897
1898     /**
1899      * precision of the intra DC coefficient - 8
1900      * - encoding: Set by user.
1901      * - decoding: unused
1902      */
1903      int intra_dc_precision;
1904
1905     /**
1906      * noise vs. sse weight for the nsse comparsion function
1907      * - encoding: Set by user.
1908      * - decoding: unused
1909      */
1910      int nsse_weight;
1911
1912     /**
1913      * Number of macroblock rows at the top which are skipped.
1914      * - encoding: unused
1915      * - decoding: Set by user.
1916      */
1917      int skip_top;
1918
1919     /**
1920      * Number of macroblock rows at the bottom which are skipped.
1921      * - encoding: unused
1922      * - decoding: Set by user.
1923      */
1924      int skip_bottom;
1925
1926     /**
1927      * profile
1928      * - encoding: Set by user.
1929      * - decoding: Set by libavcodec.
1930      */
1931      int profile;
1932 #define FF_PROFILE_UNKNOWN -99
1933 #define FF_PROFILE_AAC_MAIN 0
1934 #define FF_PROFILE_AAC_LOW  1
1935 #define FF_PROFILE_AAC_SSR  2
1936 #define FF_PROFILE_AAC_LTP  3
1937
1938     /**
1939      * level
1940      * - encoding: Set by user.
1941      * - decoding: Set by libavcodec.
1942      */
1943      int level;
1944 #define FF_LEVEL_UNKNOWN -99
1945
1946     /**
1947      * low resolution decoding, 1-> 1/2 size, 2->1/4 size
1948      * - encoding: unused
1949      * - decoding: Set by user.
1950      */
1951      int lowres;
1952
1953     /**
1954      * Bitstream width / height, may be different from width/height if lowres
1955      * or other things are used.
1956      * - encoding: unused
1957      * - decoding: Set by user before init if known. Codec should override / dynamically change if needed.
1958      */
1959     int coded_width, coded_height;
1960
1961     /**
1962      * frame skip threshold
1963      * - encoding: Set by user.
1964      * - decoding: unused
1965      */
1966     int frame_skip_threshold;
1967
1968     /**
1969      * frame skip factor
1970      * - encoding: Set by user.
1971      * - decoding: unused
1972      */
1973     int frame_skip_factor;
1974
1975     /**
1976      * frame skip exponent
1977      * - encoding: Set by user.
1978      * - decoding: unused
1979      */
1980     int frame_skip_exp;
1981
1982     /**
1983      * frame skip comparison function
1984      * - encoding: Set by user.
1985      * - decoding: unused
1986      */
1987     int frame_skip_cmp;
1988
1989     /**
1990      * Border processing masking, raises the quantizer for mbs on the borders
1991      * of the picture.
1992      * - encoding: Set by user.
1993      * - decoding: unused
1994      */
1995     float border_masking;
1996
1997     /**
1998      * minimum MB lagrange multipler
1999      * - encoding: Set by user.
2000      * - decoding: unused
2001      */
2002     int mb_lmin;
2003
2004     /**
2005      * maximum MB lagrange multipler
2006      * - encoding: Set by user.
2007      * - decoding: unused
2008      */
2009     int mb_lmax;
2010
2011     /**
2012      *
2013      * - encoding: Set by user.
2014      * - decoding: unused
2015      */
2016     int me_penalty_compensation;
2017
2018     /**
2019      *
2020      * - encoding: unused
2021      * - decoding: Set by user.
2022      */
2023     enum AVDiscard skip_loop_filter;
2024
2025     /**
2026      *
2027      * - encoding: unused
2028      * - decoding: Set by user.
2029      */
2030     enum AVDiscard skip_idct;
2031
2032     /**
2033      *
2034      * - encoding: unused
2035      * - decoding: Set by user.
2036      */
2037     enum AVDiscard skip_frame;
2038
2039     /**
2040      *
2041      * - encoding: Set by user.
2042      * - decoding: unused
2043      */
2044     int bidir_refine;
2045
2046     /**
2047      *
2048      * - encoding: Set by user.
2049      * - decoding: unused
2050      */
2051     int brd_scale;
2052
2053     /**
2054      * constant rate factor - quality-based VBR - values ~correspond to qps
2055      * - encoding: Set by user.
2056      * - decoding: unused
2057      */
2058     float crf;
2059
2060     /**
2061      * constant quantization parameter rate control method
2062      * - encoding: Set by user.
2063      * - decoding: unused
2064      */
2065     int cqp;
2066
2067     /**
2068      * minimum GOP size
2069      * - encoding: Set by user.
2070      * - decoding: unused
2071      */
2072     int keyint_min;
2073
2074     /**
2075      * number of reference frames
2076      * - encoding: Set by user.
2077      * - decoding: unused
2078      */
2079     int refs;
2080
2081     /**
2082      * chroma qp offset from luma
2083      * - encoding: Set by user.
2084      * - decoding: unused
2085      */
2086     int chromaoffset;
2087
2088     /**
2089      * Influences how often B-frames are used.
2090      * - encoding: Set by user.
2091      * - decoding: unused
2092      */
2093     int bframebias;
2094
2095     /**
2096      * trellis RD quantization
2097      * - encoding: Set by user.
2098      * - decoding: unused
2099      */
2100     int trellis;
2101
2102     /**
2103      * Reduce fluctuations in qp (before curve compression).
2104      * - encoding: Set by user.
2105      * - decoding: unused
2106      */
2107     float complexityblur;
2108
2109     /**
2110      * in-loop deblocking filter alphac0 parameter
2111      * alpha is in the range -6...6
2112      * - encoding: Set by user.
2113      * - decoding: unused
2114      */
2115     int deblockalpha;
2116
2117     /**
2118      * in-loop deblocking filter beta parameter
2119      * beta is in the range -6...6
2120      * - encoding: Set by user.
2121      * - decoding: unused
2122      */
2123     int deblockbeta;
2124
2125     /**
2126      * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
2127      * - encoding: Set by user.
2128      * - decoding: unused
2129      */
2130     int partitions;
2131 #define X264_PART_I4X4 0x001  /* Analyze i4x4 */
2132 #define X264_PART_I8X8 0x002  /* Analyze i8x8 (requires 8x8 transform) */
2133 #define X264_PART_P8X8 0x010  /* Analyze p16x8, p8x16 and p8x8 */
2134 #define X264_PART_P4X4 0x020  /* Analyze p8x4, p4x8, p4x4 */
2135 #define X264_PART_B8X8 0x100  /* Analyze b16x8, b8x16 and b8x8 */
2136
2137     /**
2138      * direct MV prediction mode - 0 (none), 1 (spatial), 2 (temporal)
2139      * - encoding: Set by user.
2140      * - decoding: unused
2141      */
2142     int directpred;
2143
2144     /**
2145      * Audio cutoff bandwidth (0 means "automatic")
2146      * - encoding: Set by user.
2147      * - decoding: unused
2148      */
2149     int cutoff;
2150
2151     /**
2152      * Multiplied by qscale for each frame and added to scene_change_score.
2153      * - encoding: Set by user.
2154      * - decoding: unused
2155      */
2156     int scenechange_factor;
2157
2158     /**
2159      *
2160      * Note: Value depends upon the compare function used for fullpel ME.
2161      * - encoding: Set by user.
2162      * - decoding: unused
2163      */
2164     int mv0_threshold;
2165
2166     /**
2167      * Adjusts sensitivity of b_frame_strategy 1.
2168      * - encoding: Set by user.
2169      * - decoding: unused
2170      */
2171     int b_sensitivity;
2172
2173     /**
2174      * - encoding: Set by user.
2175      * - decoding: unused
2176      */
2177     int compression_level;
2178 #define FF_COMPRESSION_DEFAULT -1
2179
2180     /**
2181      * Sets whether to use LPC mode - used by FLAC encoder.
2182      * - encoding: Set by user.
2183      * - decoding: unused
2184      */
2185     int use_lpc;
2186
2187     /**
2188      * LPC coefficient precision - used by FLAC encoder
2189      * - encoding: Set by user.
2190      * - decoding: unused
2191      */
2192     int lpc_coeff_precision;
2193
2194     /**
2195      * - encoding: Set by user.
2196      * - decoding: unused
2197      */
2198     int min_prediction_order;
2199
2200     /**
2201      * - encoding: Set by user.
2202      * - decoding: unused
2203      */
2204     int max_prediction_order;
2205
2206     /**
2207      * search method for selecting prediction order
2208      * - encoding: Set by user.
2209      * - decoding: unused
2210      */
2211     int prediction_order_method;
2212
2213     /**
2214      * - encoding: Set by user.
2215      * - decoding: unused
2216      */
2217     int min_partition_order;
2218
2219     /**
2220      * - encoding: Set by user.
2221      * - decoding: unused
2222      */
2223     int max_partition_order;
2224
2225     /**
2226      * GOP timecode frame start number, in non drop frame format
2227      * - encoding: Set by user.
2228      * - decoding: unused
2229      */
2230     int64_t timecode_frame_start;
2231
2232     /**
2233      * Decoder should decode to this many channels if it can (0 for default)
2234      * - encoding: unused
2235      * - decoding: Set by user.
2236      */
2237     int request_channels;
2238
2239     /**
2240      * Percentage of dynamic range compression to be applied by the decoder.
2241      * The default value is 1.0, corresponding to full compression.
2242      * - encoding: unused
2243      * - decoding: Set by user.
2244      */
2245     float drc_scale;
2246
2247     /**
2248      * opaque 64bit number (generally a PTS) that will be reordered and
2249      * output in AVFrame.reordered_opaque
2250      * - encoding: unused
2251      * - decoding: Set by user.
2252      */
2253     int64_t reordered_opaque;
2254
2255     /**
2256      * Bits per sample/pixel of internal libavcodec pixel/sample format.
2257      * This field is applicable only when sample_fmt is SAMPLE_FMT_S32.
2258      * - encoding: set by user.
2259      * - decoding: set by libavcodec.
2260      */
2261     int bits_per_raw_sample;
2262 } AVCodecContext;
2263
2264 /**
2265  * AVCodec.
2266  */
2267 typedef struct AVCodec {
2268     /**
2269      * Name of the codec implementation.
2270      * The name is globally unique among encoders and among decoders (but an
2271      * encoder and a decoder can share the same name).
2272      * This is the primary way to find a codec from the user perspective.
2273      */
2274     const char *name;
2275     enum CodecType type;
2276     enum CodecID id;
2277     int priv_data_size;
2278     int (*init)(AVCodecContext *);
2279     int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2280     int (*close)(AVCodecContext *);
2281     int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2282                   const uint8_t *buf, int buf_size);
2283     /**
2284      * Codec capabilities.
2285      * see CODEC_CAP_*
2286      */
2287     int capabilities;
2288     struct AVCodec *next;
2289     /**
2290      * Flush buffers.
2291      * Will be called when seeking
2292      */
2293     void (*flush)(AVCodecContext *);
2294     const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
2295     const enum PixelFormat *pix_fmts;       ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
2296     /**
2297      * Descriptive name for the codec, meant to be more human readable than \p name.
2298      * You \e should use the NULL_IF_CONFIG_SMALL() macro to define it.
2299      */
2300     const char *long_name;
2301     const int *supported_samplerates;       ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
2302     const enum SampleFormat *sample_fmts;   ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
2303 } AVCodec;
2304
2305 /**
2306  * four components are given, that's all.
2307  * the last component is alpha
2308  */
2309 typedef struct AVPicture {
2310     uint8_t *data[4];
2311     int linesize[4];       ///< number of bytes per line
2312 } AVPicture;
2313
2314 /**
2315  * AVPaletteControl
2316  * This structure defines a method for communicating palette changes
2317  * between and demuxer and a decoder.
2318  *
2319  * @deprecated Use AVPacket to send palette changes instead.
2320  * This is totally broken.
2321  */
2322 #define AVPALETTE_SIZE 1024
2323 #define AVPALETTE_COUNT 256
2324 typedef struct AVPaletteControl {
2325
2326     /* Demuxer sets this to 1 to indicate the palette has changed;
2327      * decoder resets to 0. */
2328     int palette_changed;
2329
2330     /* 4-byte ARGB palette entries, stored in native byte order; note that
2331      * the individual palette components should be on a 8-bit scale; if
2332      * the palette data comes from an IBM VGA native format, the component
2333      * data is probably 6 bits in size and needs to be scaled. */
2334     unsigned int palette[AVPALETTE_COUNT];
2335
2336 } AVPaletteControl attribute_deprecated;
2337
2338 typedef struct AVSubtitleRect {
2339     uint16_t x;
2340     uint16_t y;
2341     uint16_t w;
2342     uint16_t h;
2343     uint16_t nb_colors;
2344     int linesize;
2345     uint32_t *rgba_palette;
2346     uint8_t *bitmap;
2347 } AVSubtitleRect;
2348
2349 typedef struct AVSubtitle {
2350     uint16_t format; /* 0 = graphics */
2351     uint32_t start_display_time; /* relative to packet pts, in ms */
2352     uint32_t end_display_time; /* relative to packet pts, in ms */
2353     uint32_t num_rects;
2354     AVSubtitleRect *rects;
2355 } AVSubtitle;
2356
2357
2358 /* resample.c */
2359
2360 struct ReSampleContext;
2361 struct AVResampleContext;
2362
2363 typedef struct ReSampleContext ReSampleContext;
2364
2365 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2366                                      int output_rate, int input_rate);
2367 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2368 void audio_resample_close(ReSampleContext *s);
2369
2370 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2371 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2372 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2373 void av_resample_close(struct AVResampleContext *c);
2374
2375 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2376 /* YUV420 format is assumed ! */
2377
2378 /**
2379  * @deprecated Use the software scaler (swscale) instead.
2380  */
2381 typedef struct ImgReSampleContext ImgReSampleContext attribute_deprecated;
2382
2383 /**
2384  * @deprecated Use the software scaler (swscale) instead.
2385  */
2386 attribute_deprecated ImgReSampleContext *img_resample_init(int output_width, int output_height,
2387                                       int input_width, int input_height);
2388
2389 /**
2390  * @deprecated Use the software scaler (swscale) instead.
2391  */
2392 attribute_deprecated ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2393                                       int iwidth, int iheight,
2394                                       int topBand, int bottomBand,
2395                                       int leftBand, int rightBand,
2396                                       int padtop, int padbottom,
2397                                       int padleft, int padright);
2398
2399 /**
2400  * @deprecated Use the software scaler (swscale) instead.
2401  */
2402 attribute_deprecated void img_resample(struct ImgReSampleContext *s,
2403                   AVPicture *output, const AVPicture *input);
2404
2405 /**
2406  * @deprecated Use the software scaler (swscale) instead.
2407  */
2408 attribute_deprecated void img_resample_close(struct ImgReSampleContext *s);
2409
2410 #endif
2411
2412 /**
2413  * Allocate memory for a picture.  Call avpicture_free to free it.
2414  *
2415  * @param picture the picture to be filled in
2416  * @param pix_fmt the format of the picture
2417  * @param width the width of the picture
2418  * @param height the height of the picture
2419  * @return zero if successful, a negative value if not
2420  */
2421 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2422
2423 /**
2424  * Free a picture previously allocated by avpicture_alloc().
2425  *
2426  * @param picture the AVPicture to be freed
2427  */
2428 void avpicture_free(AVPicture *picture);
2429
2430 /**
2431  * Fill in the AVPicture fields.
2432  * The fields of the given AVPicture are filled in by using the 'ptr' address
2433  * which points to the image data buffer. Depending on the specified picture
2434  * format, one or multiple image data pointers and line sizes will be set.
2435  * If a planar format is specified, several pointers will be set pointing to
2436  * the different picture planes and the line sizes of the different planes
2437  * will be stored in the lines_sizes array.
2438  *
2439  * @param picture AVPicture whose fields are to be filled in
2440  * @param ptr Buffer which will contain or contains the actual image data
2441  * @param pix_fmt The format in which the picture data is stored.
2442  * @param width the width of the image in pixels
2443  * @param height the height of the image in pixels
2444  * @return size of the image data in bytes
2445  */
2446 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2447                    int pix_fmt, int width, int height);
2448 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2449                      unsigned char *dest, int dest_size);
2450
2451 /**
2452  * Calculate the size in bytes that a picture of the given width and height
2453  * would occupy if stored in the given picture format.
2454  *
2455  * @param pix_fmt the given picture format
2456  * @param width the width of the image
2457  * @param height the height of the image
2458  * @return Image data size in bytes
2459  */
2460 int avpicture_get_size(int pix_fmt, int width, int height);
2461 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2462 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2463 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2464 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2465 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2466
2467 #define FF_LOSS_RESOLUTION  0x0001 /**< loss due to resolution change */
2468 #define FF_LOSS_DEPTH       0x0002 /**< loss due to color depth change */
2469 #define FF_LOSS_COLORSPACE  0x0004 /**< loss due to color space conversion */
2470 #define FF_LOSS_ALPHA       0x0008 /**< loss of alpha bits */
2471 #define FF_LOSS_COLORQUANT  0x0010 /**< loss due to color quantization */
2472 #define FF_LOSS_CHROMA      0x0020 /**< loss of chroma (e.g. RGB to gray conversion) */
2473
2474 /**
2475  * Computes what kind of losses will occur when converting from one specific
2476  * pixel format to another.
2477  * When converting from one pixel format to another, information loss may occur.
2478  * For example, when converting from RGB24 to GRAY, the color information will
2479  * be lost. Similarly, other losses occur when converting from some formats to
2480  * other formats. These losses can involve loss of chroma, but also loss of
2481  * resolution, loss of color depth, loss due to the color space conversion, loss
2482  * of the alpha bits or loss due to color quantization.
2483  * avcodec_get_fix_fmt_loss() informs you about the various types of losses
2484  * which will occur when converting from one pixel format to another.
2485  *
2486  * @param[in] dst_pix_fmt destination pixel format
2487  * @param[in] src_pix_fmt source pixel format
2488  * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2489  * @return Combination of flags informing you what kind of losses will occur.
2490  */
2491 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2492                              int has_alpha);
2493
2494 /**
2495  * Finds the best pixel format to convert to given a certain source pixel
2496  * format.  When converting from one pixel format to another, information loss
2497  * may occur.  For example, when converting from RGB24 to GRAY, the color
2498  * information will be lost. Similarly, other losses occur when converting from
2499  * some formats to other formats. avcodec_find_best_pix_fmt() searches which of
2500  * the given pixel formats should be used to suffer the least amount of loss.
2501  * The pixel formats from which it chooses one, are determined by the
2502  * \p pix_fmt_mask parameter.
2503  *
2504  * @code
2505  * src_pix_fmt = PIX_FMT_YUV420P;
2506  * pix_fmt_mask = (1 << PIX_FMT_YUV422P) || (1 << PIX_FMT_RGB24);
2507  * dst_pix_fmt = avcodec_find_best_pix_fmt(pix_fmt_mask, src_pix_fmt, alpha, &loss);
2508  * @endcode
2509  *
2510  * @param[in] pix_fmt_mask bitmask determining which pixel format to choose from
2511  * @param[in] src_pix_fmt source pixel format
2512  * @param[in] has_alpha Whether the source pixel format alpha channel is used.
2513  * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
2514  * @return The best pixel format to convert to or -1 if none was found.
2515  */
2516 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2517                               int has_alpha, int *loss_ptr);
2518
2519
2520 /**
2521  * Print in buf the string corresponding to the pixel format with
2522  * number pix_fmt, or an header if pix_fmt is negative.
2523  *
2524  * @param[in] buf the buffer where to write the string
2525  * @param[in] buf_size the size of buf
2526  * @param[in] pix_fmt the number of the pixel format to print the corresponding info string, or
2527  * a negative value to print the corresponding header.
2528  * Meaningful values for obtaining a pixel format info vary from 0 to PIX_FMT_NB -1.
2529  */
2530 void avcodec_pix_fmt_string (char *buf, int buf_size, int pix_fmt);
2531
2532 #define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2533 #define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2534
2535 /**
2536  * Tell if an image really has transparent alpha values.
2537  * @return ored mask of FF_ALPHA_xxx constants
2538  */
2539 int img_get_alpha_info(const AVPicture *src,
2540                        int pix_fmt, int width, int height);
2541
2542 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2543 /**
2544  * convert among pixel formats
2545  * @deprecated Use the software scaler (swscale) instead.
2546  */
2547 attribute_deprecated int img_convert(AVPicture *dst, int dst_pix_fmt,
2548                 const AVPicture *src, int pix_fmt,
2549                 int width, int height);
2550 #endif
2551
2552 /* deinterlace a picture */
2553 /* deinterlace - if not supported return -1 */
2554 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2555                           int pix_fmt, int width, int height);
2556
2557 /* external high level API */
2558
2559 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2560 extern AVCodec *first_avcodec;
2561 #endif
2562 AVCodec *av_codec_next(AVCodec *c);
2563
2564 /**
2565  * Returns the LIBAVCODEC_VERSION_INT constant.
2566  */
2567 unsigned avcodec_version(void);
2568
2569 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2570 /* returns LIBAVCODEC_BUILD constant */
2571 attribute_deprecated unsigned avcodec_build(void);
2572 #endif
2573
2574 /**
2575  * Initializes libavcodec.
2576  *
2577  * @warning This function \e must be called before any other libavcodec
2578  * function.
2579  */
2580 void avcodec_init(void);
2581
2582 void register_avcodec(AVCodec *format);
2583
2584 /**
2585  * Finds a registered encoder with a matching codec ID.
2586  *
2587  * @param id CodecID of the requested encoder
2588  * @return An encoder if one was found, NULL otherwise.
2589  */
2590 AVCodec *avcodec_find_encoder(enum CodecID id);
2591
2592 /**
2593  * Finds a registered encoder with the specified name.
2594  *
2595  * @param name name of the requested encoder
2596  * @return An encoder if one was found, NULL otherwise.
2597  */
2598 AVCodec *avcodec_find_encoder_by_name(const char *name);
2599
2600 /**
2601  * Finds a registered decoder with a matching codec ID.
2602  *
2603  * @param id CodecID of the requested decoder
2604  * @return A decoder if one was found, NULL otherwise.
2605  */
2606 AVCodec *avcodec_find_decoder(enum CodecID id);
2607
2608 /**
2609  * Finds a registered decoder with the specified name.
2610  *
2611  * @param name name of the requested decoder
2612  * @return A decoder if one was found, NULL otherwise.
2613  */
2614 AVCodec *avcodec_find_decoder_by_name(const char *name);
2615 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2616
2617 /**
2618  * Sets the fields of the given AVCodecContext to default values.
2619  *
2620  * @param s The AVCodecContext of which the fields should be set to default values.
2621  */
2622 void avcodec_get_context_defaults(AVCodecContext *s);
2623
2624 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2625  *  we WILL change its arguments and name a few times! */
2626 void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType);
2627
2628 /**
2629  * Allocates an AVCodecContext and sets its fields to default values.  The
2630  * resulting struct can be deallocated by simply calling av_free().
2631  *
2632  * @return An AVCodecContext filled with default values or NULL on failure.
2633  * @see avcodec_get_context_defaults
2634  */
2635 AVCodecContext *avcodec_alloc_context(void);
2636
2637 /** THIS FUNCTION IS NOT YET PART OF THE PUBLIC API!
2638  *  we WILL change its arguments and name a few times! */
2639 AVCodecContext *avcodec_alloc_context2(enum CodecType);
2640
2641 /**
2642  * Sets the fields of the given AVFrame to default values.
2643  *
2644  * @param pic The AVFrame of which the fields should be set to default values.
2645  */
2646 void avcodec_get_frame_defaults(AVFrame *pic);
2647
2648 /**
2649  * Allocates an AVFrame and sets its fields to default values.  The resulting
2650  * struct can be deallocated by simply calling av_free().
2651  *
2652  * @return An AVFrame filled with default values or NULL on failure.
2653  * @see avcodec_get_frame_defaults
2654  */
2655 AVFrame *avcodec_alloc_frame(void);
2656
2657 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2658 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2659 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2660 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2661
2662 /**
2663  * Checks if the given dimension of a picture is valid, meaning that all
2664  * bytes of the picture can be addressed with a signed int.
2665  *
2666  * @param[in] w Width of the picture.
2667  * @param[in] h Height of the picture.
2668  * @return Zero if valid, a negative value if invalid.
2669  */
2670 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2671 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2672
2673 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2674 void avcodec_thread_free(AVCodecContext *s);
2675 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2676 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2677 //FIXME func typedef
2678
2679 /**
2680  * Initializes the AVCodecContext to use the given AVCodec. Prior to using this
2681  * function the context has to be allocated.
2682  *
2683  * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
2684  * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
2685  * retrieving a codec.
2686  *
2687  * @warning This function is not thread safe!
2688  *
2689  * @code
2690  * avcodec_register_all();
2691  * codec = avcodec_find_decoder(CODEC_ID_H264);
2692  * if (!codec)
2693  *     exit(1);
2694  *
2695  * context = avcodec_alloc_context();
2696  *
2697  * if (avcodec_open(context, codec) < 0)
2698  *     exit(1);
2699  * @endcode
2700  *
2701  * @param avctx The context which will be set up to use the given codec.
2702  * @param codec The codec to use within the context.
2703  * @return zero on success, a negative value on error
2704  * @see avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder
2705  */
2706 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2707
2708 /**
2709  * @deprecated Use avcodec_decode_audio2() instead.
2710  */
2711 attribute_deprecated int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2712                          int *frame_size_ptr,
2713                          const uint8_t *buf, int buf_size);
2714
2715 /**
2716  * Decodes an audio frame from \p buf into \p samples.
2717  * The avcodec_decode_audio2() function decodes an audio frame from the input
2718  * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2719  * audio codec which was coupled with \p avctx using avcodec_open(). The
2720  * resulting decoded frame is stored in output buffer \p samples.  If no frame
2721  * could be decompressed, \p frame_size_ptr is zero. Otherwise, it is the
2722  * decompressed frame size in \e bytes.
2723  *
2724  * @warning You \e must set \p frame_size_ptr to the allocated size of the
2725  * output buffer before calling avcodec_decode_audio2().
2726  *
2727  * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2728  * the actual read bytes because some optimized bitstream readers read 32 or 64
2729  * bits at once and could read over the end.
2730  *
2731  * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2732  * no overreading happens for damaged MPEG streams.
2733  *
2734  * @note You might have to align the input buffer \p buf and output buffer \p
2735  * samples. The alignment requirements depend on the CPU: On some CPUs it isn't
2736  * necessary at all, on others it won't work at all if not aligned and on others
2737  * it will work but it will have an impact on performance. In practice, the
2738  * bitstream should have 4 byte alignment at minimum and all sample data should
2739  * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2740  * the linesize is not a multiple of 16 then there's no sense in aligning the
2741  * start of the buffer to 16.
2742  *
2743  * @param avctx the codec context
2744  * @param[out] samples the output buffer
2745  * @param[in,out] frame_size_ptr the output buffer size in bytes
2746  * @param[in] buf the input buffer
2747  * @param[in] buf_size the input buffer size in bytes
2748  * @return On error a negative value is returned, otherwise the number of bytes
2749  * used or zero if no frame could be decompressed.
2750  */
2751 int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
2752                          int *frame_size_ptr,
2753                          const uint8_t *buf, int buf_size);
2754
2755 /**
2756  * Decodes a video frame from \p buf into \p picture.
2757  * The avcodec_decode_video() function decodes a video frame from the input
2758  * buffer \p buf of size \p buf_size. To decode it, it makes use of the
2759  * video codec which was coupled with \p avctx using avcodec_open(). The
2760  * resulting decoded frame is stored in \p picture.
2761  *
2762  * @warning The input buffer must be \c FF_INPUT_BUFFER_PADDING_SIZE larger than
2763  * the actual read bytes because some optimized bitstream readers read 32 or 64
2764  * bits at once and could read over the end.
2765  *
2766  * @warning The end of the input buffer \p buf should be set to 0 to ensure that
2767  * no overreading happens for damaged MPEG streams.
2768  *
2769  * @note You might have to align the input buffer \p buf and output buffer \p
2770  * samples. The alignment requirements depend on the CPU: on some CPUs it isn't
2771  * necessary at all, on others it won't work at all if not aligned and on others
2772  * it will work but it will have an impact on performance. In practice, the
2773  * bitstream should have 4 byte alignment at minimum and all sample data should
2774  * be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If
2775  * the linesize is not a multiple of 16 then there's no sense in aligning the
2776  * start of the buffer to 16.
2777  *
2778  * @param avctx the codec context
2779  * @param[out] picture The AVFrame in which the decoded video frame will be stored.
2780  * @param[in] buf the input buffer
2781  * @param[in] buf_size the size of the input buffer in bytes
2782  * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
2783  * @return On error a negative value is returned, otherwise the number of bytes
2784  * used or zero if no frame could be decompressed.
2785  */
2786 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2787                          int *got_picture_ptr,
2788                          const uint8_t *buf, int buf_size);
2789
2790 /* Decode a subtitle message. Return -1 if error, otherwise return the
2791  * number of bytes used. If no subtitle could be decompressed,
2792  * got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
2793 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2794                             int *got_sub_ptr,
2795                             const uint8_t *buf, int buf_size);
2796 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2797                         int *data_size_ptr,
2798                         uint8_t *buf, int buf_size);
2799
2800 /**
2801  * Encodes an audio frame from \p samples into \p buf.
2802  * The avcodec_encode_audio() function encodes an audio frame from the input
2803  * buffer \p samples. To encode it, it makes use of the audio codec which was
2804  * coupled with \p avctx using avcodec_open(). The resulting encoded frame is
2805  * stored in output buffer \p buf.
2806  *
2807  * @note The output buffer should be at least \c FF_MIN_BUFFER_SIZE bytes large.
2808  *
2809  * @param avctx the codec context
2810  * @param[out] buf the output buffer
2811  * @param[in] buf_size the output buffer size
2812  * @param[in] samples the input buffer containing the samples
2813  * The number of samples read from this buffer is frame_size*channels,
2814  * both of which are defined in \p avctx.
2815  * For PCM audio the number of samples read from \p samples is equal to
2816  * \p buf_size * input_sample_size / output_sample_size.
2817  * @return On error a negative value is returned, on success zero or the number
2818  * of bytes used to encode the data read from the input buffer.
2819  */
2820 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2821                          const short *samples);
2822
2823 /**
2824  * Encodes a video frame from \p pict into \p buf.
2825  * The avcodec_encode_video() function encodes a video frame from the input
2826  * \p pict. To encode it, it makes use of the video codec which was coupled with
2827  * \p avctx using avcodec_open(). The resulting encoded bytes representing the
2828  * frame are stored in the output buffer \p buf. The input picture should be
2829  * stored using a specific format, namely \c avctx.pix_fmt.
2830  *
2831  * @param avctx the codec context
2832  * @param[out] buf the output buffer for the bitstream of encoded frame
2833  * @param[in] buf_size the size of the output buffer in bytes
2834  * @param[in] pict the input picture to encode
2835  * @return On error a negative value is returned, on success zero or the number
2836  * of bytes used from the input buffer.
2837  */
2838 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2839                          const AVFrame *pict);
2840 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2841                             const AVSubtitle *sub);
2842
2843 int avcodec_close(AVCodecContext *avctx);
2844
2845 void avcodec_register_all(void);
2846
2847 /**
2848  * Flush buffers, should be called when seeking or when switching to a different stream.
2849  */
2850 void avcodec_flush_buffers(AVCodecContext *avctx);
2851
2852 void avcodec_default_free_buffers(AVCodecContext *s);
2853
2854 /* misc useful functions */
2855
2856 /**
2857  * Returns a single letter to describe the given picture type \p pict_type.
2858  *
2859  * @param[in] pict_type the picture type
2860  * @return A single character representing the picture type.
2861  */
2862 char av_get_pict_type_char(int pict_type);
2863
2864 /**
2865  * Returns codec bits per sample.
2866  *
2867  * @param[in] codec_id the codec
2868  * @return Number of bits per sample or zero if unknown for the given codec.
2869  */
2870 int av_get_bits_per_sample(enum CodecID codec_id);
2871
2872 /**
2873  * Returns sample format bits per sample.
2874  *
2875  * @param[in] sample_fmt the sample format
2876  * @return Number of bits per sample or zero if unknown for the given sample format.
2877  */
2878 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt);
2879
2880 /* frame parsing */
2881 typedef struct AVCodecParserContext {
2882     void *priv_data;
2883     struct AVCodecParser *parser;
2884     int64_t frame_offset; /* offset of the current frame */
2885     int64_t cur_offset; /* current offset
2886                            (incremented by each av_parser_parse()) */
2887     int64_t next_frame_offset; /* offset of the next frame */
2888     /* video info */
2889     int pict_type; /* XXX: Put it back in AVCodecContext. */
2890     int repeat_pict; /* XXX: Put it back in AVCodecContext. */
2891     int64_t pts;     /* pts of the current frame */
2892     int64_t dts;     /* dts of the current frame */
2893
2894     /* private data */
2895     int64_t last_pts;
2896     int64_t last_dts;
2897     int fetch_timestamp;
2898
2899 #define AV_PARSER_PTS_NB 4
2900     int cur_frame_start_index;
2901     int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2902     int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2903     int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2904
2905     int flags;
2906 #define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2907
2908     int64_t offset;      ///< byte offset from starting packet start
2909     int64_t cur_frame_end[AV_PARSER_PTS_NB];
2910 } AVCodecParserContext;
2911
2912 typedef struct AVCodecParser {
2913     int codec_ids[5]; /* several codec IDs are permitted */
2914     int priv_data_size;
2915     int (*parser_init)(AVCodecParserContext *s);
2916     int (*parser_parse)(AVCodecParserContext *s,
2917                         AVCodecContext *avctx,
2918                         const uint8_t **poutbuf, int *poutbuf_size,
2919                         const uint8_t *buf, int buf_size);
2920     void (*parser_close)(AVCodecParserContext *s);
2921     int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2922     struct AVCodecParser *next;
2923 } AVCodecParser;
2924
2925 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
2926 extern AVCodecParser *av_first_parser;
2927 #endif
2928 AVCodecParser *av_parser_next(AVCodecParser *c);
2929
2930 void av_register_codec_parser(AVCodecParser *parser);
2931 AVCodecParserContext *av_parser_init(int codec_id);
2932 int av_parser_parse(AVCodecParserContext *s,
2933                     AVCodecContext *avctx,
2934                     uint8_t **poutbuf, int *poutbuf_size,
2935                     const uint8_t *buf, int buf_size,
2936                     int64_t pts, int64_t dts);
2937 int av_parser_change(AVCodecParserContext *s,
2938                      AVCodecContext *avctx,
2939                      uint8_t **poutbuf, int *poutbuf_size,
2940                      const uint8_t *buf, int buf_size, int keyframe);
2941 void av_parser_close(AVCodecParserContext *s);
2942
2943
2944 typedef struct AVBitStreamFilterContext {
2945     void *priv_data;
2946     struct AVBitStreamFilter *filter;
2947     AVCodecParserContext *parser;
2948     struct AVBitStreamFilterContext *next;
2949 } AVBitStreamFilterContext;
2950
2951
2952 typedef struct AVBitStreamFilter {
2953     const char *name;
2954     int priv_data_size;
2955     int (*filter)(AVBitStreamFilterContext *bsfc,
2956                   AVCodecContext *avctx, const char *args,
2957                   uint8_t **poutbuf, int *poutbuf_size,
2958                   const uint8_t *buf, int buf_size, int keyframe);
2959     void (*close)(AVBitStreamFilterContext *bsfc);
2960     struct AVBitStreamFilter *next;
2961 } AVBitStreamFilter;
2962
2963 void av_register_bitstream_filter(AVBitStreamFilter *bsf);
2964 AVBitStreamFilterContext *av_bitstream_filter_init(const char *name);
2965 int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
2966                                AVCodecContext *avctx, const char *args,
2967                                uint8_t **poutbuf, int *poutbuf_size,
2968                                const uint8_t *buf, int buf_size, int keyframe);
2969 void av_bitstream_filter_close(AVBitStreamFilterContext *bsf);
2970
2971 AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f);
2972
2973 /* memory */
2974
2975 /**
2976  * Reallocates the given block if it is not large enough, otherwise it
2977  * does nothing.
2978  *
2979  * @see av_realloc
2980  */
2981 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2982
2983 /**
2984  * Copy image 'src' to 'dst'.
2985  */
2986 void av_picture_copy(AVPicture *dst, const AVPicture *src,
2987               int pix_fmt, int width, int height);
2988
2989 /**
2990  * Crop image top and left side.
2991  */
2992 int av_picture_crop(AVPicture *dst, const AVPicture *src,
2993              int pix_fmt, int top_band, int left_band);
2994
2995 /**
2996  * Pad image.
2997  */
2998 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
2999             int padtop, int padbottom, int padleft, int padright, int *color);
3000
3001 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
3002 /**
3003  * @deprecated Use the software scaler (swscale) instead.
3004  */
3005 attribute_deprecated void img_copy(AVPicture *dst, const AVPicture *src,
3006               int pix_fmt, int width, int height);
3007
3008 /**
3009  * @deprecated Use the software scaler (swscale) instead.
3010  */
3011 attribute_deprecated int img_crop(AVPicture *dst, const AVPicture *src,
3012              int pix_fmt, int top_band, int left_band);
3013
3014 /**
3015  * @deprecated Use the software scaler (swscale) instead.
3016  */
3017 attribute_deprecated int img_pad(AVPicture *dst, const AVPicture *src, int height, int width, int pix_fmt,
3018             int padtop, int padbottom, int padleft, int padright, int *color);
3019 #endif
3020
3021 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
3022
3023 /**
3024  * Parses \p str and put in \p width_ptr and \p height_ptr the detected values.
3025  *
3026  * @return 0 in case of a successful parsing, a negative value otherwise
3027  * @param[in] str the string to parse: it has to be a string in the format
3028  * <width>x<height> or a valid video frame size abbreviation.
3029  * @param[in,out] width_ptr pointer to the variable which will contain the detected
3030  * frame width value
3031  * @param[in,out] height_ptr pointer to the variable which will contain the detected
3032  * frame height value
3033  */
3034 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str);
3035
3036 /**
3037  * Parses \p str and put in \p frame_rate the detected values.
3038  *
3039  * @return 0 in case of a successful parsing, a negative value otherwise
3040  * @param[in] str the string to parse: it has to be a string in the format
3041  * <frame_rate_nom>/<frame_rate_den>, a float number or a valid video rate abbreviation
3042  * @param[in,out] frame_rate pointer to the AVRational which will contain the detected
3043  * frame rate
3044  */
3045 int av_parse_video_frame_rate(AVRational *frame_rate, const char *str);
3046
3047 /**
3048  * Logs a generic warning message about a missing feature.
3049  * @param[in] avc a pointer to an arbitrary struct of which the first field is
3050  * a pointer to an AVClass struct
3051  * @param[in] feature string containing the name of the missing feature
3052  * @param[in] want_sample indicates if samples are wanted which exhibit this feature.
3053  * If \p want_sample is non-zero, additional verbage will be added to the log
3054  * message which tells the user how to report samples to the development
3055  * mailing list.
3056  */
3057 void av_log_missing_feature(void *avc, const char *feature, int want_sample);
3058
3059 /* error handling */
3060 #if EINVAL > 0
3061 #define AVERROR(e) (-(e)) /**< Returns a negative error code from a POSIX error code, to return from library functions. */
3062 #define AVUNERROR(e) (-(e)) /**< Returns a POSIX error code from a library function error return value. */
3063 #else
3064 /* Some platforms have E* and errno already negated. */
3065 #define AVERROR(e) (e)
3066 #define AVUNERROR(e) (e)
3067 #endif
3068 #define AVERROR_UNKNOWN     AVERROR(EINVAL)  /**< unknown error */
3069 #define AVERROR_IO          AVERROR(EIO)     /**< I/O error */
3070 #define AVERROR_NUMEXPECTED AVERROR(EDOM)    /**< Number syntax expected in filename. */
3071 #define AVERROR_INVALIDDATA AVERROR(EINVAL)  /**< invalid data found */
3072 #define AVERROR_NOMEM       AVERROR(ENOMEM)  /**< not enough memory */
3073 #define AVERROR_NOFMT       AVERROR(EILSEQ)  /**< unknown format */
3074 #define AVERROR_NOTSUPP     AVERROR(ENOSYS)  /**< Operation not supported. */
3075 #define AVERROR_NOENT       AVERROR(ENOENT)  /**< No such file or directory. */
3076 #define AVERROR_PATCHWELCOME    -MKTAG('P','A','W','E') /**< Not yet implemented in FFmpeg. Patches welcome. */
3077
3078 #endif /* AVCODEC_AVCODEC_H */