libavcodec/avcodec.h

   1 #ifndef AVCODEC_H
   2 #define AVCODEC_H
   3
   4 /**
   5  * @file avcodec.h
   6  * external api header.
   7  */
   8
   9
  10 #ifdef __cplusplus
  11 extern "C" {
  12 #endif
  13
  14 #include "avutil.h"
  15 #include <sys/types.h> /* size_t */
  16
  17 //FIXME the following 2 really dont belong in here
  18 #define FFMPEG_VERSION_INT     0x000409
  19 #define FFMPEG_VERSION         "CVS"
  20
  21 #define AV_STRINGIFY(s) AV_TOSTRING(s)
  22 #define AV_TOSTRING(s) #s
  23
  24 #define LIBAVCODEC_VERSION_INT ((50<<16)+(0<<8)+0)
  25 #define LIBAVCODEC_VERSION     50.0.0
  26 #define LIBAVCODEC_BUILD       LIBAVCODEC_VERSION_INT
  27
  28 #define LIBAVCODEC_IDENT       "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
  29
  30 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
  31 #define AV_TIME_BASE 1000000
  32 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
  33
  34 enum CodecID {
  35     CODEC_ID_NONE,
  36     CODEC_ID_MPEG1VIDEO,
  37     CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
  38     CODEC_ID_MPEG2VIDEO_XVMC,
  39     CODEC_ID_H261,
  40     CODEC_ID_H263,
  41     CODEC_ID_RV10,
  42     CODEC_ID_RV20,
  43     CODEC_ID_MJPEG,
  44     CODEC_ID_MJPEGB,
  45     CODEC_ID_LJPEG,
  46     CODEC_ID_SP5X,
  47     CODEC_ID_MPEG4,
  48     CODEC_ID_RAWVIDEO,
  49     CODEC_ID_MSMPEG4V1,
  50     CODEC_ID_MSMPEG4V2,
  51     CODEC_ID_MSMPEG4V3,
  52     CODEC_ID_WMV1,
  53     CODEC_ID_WMV2,
  54     CODEC_ID_H263P,
  55     CODEC_ID_H263I,
  56     CODEC_ID_FLV1,
  57     CODEC_ID_SVQ1,
  58     CODEC_ID_SVQ3,
  59     CODEC_ID_DVVIDEO,
  60     CODEC_ID_HUFFYUV,
  61     CODEC_ID_CYUV,
  62     CODEC_ID_H264,
  63     CODEC_ID_INDEO3,
  64     CODEC_ID_VP3,
  65     CODEC_ID_THEORA,
  66     CODEC_ID_ASV1,
  67     CODEC_ID_ASV2,
  68     CODEC_ID_FFV1,
  69     CODEC_ID_4XM,
  70     CODEC_ID_VCR1,
  71     CODEC_ID_CLJR,
  72     CODEC_ID_MDEC,
  73     CODEC_ID_ROQ,
  74     CODEC_ID_INTERPLAY_VIDEO,
  75     CODEC_ID_XAN_WC3,
  76     CODEC_ID_XAN_WC4,
  77     CODEC_ID_RPZA,
  78     CODEC_ID_CINEPAK,
  79     CODEC_ID_WS_VQA,
  80     CODEC_ID_MSRLE,
  81     CODEC_ID_MSVIDEO1,
  82     CODEC_ID_IDCIN,
  83     CODEC_ID_8BPS,
  84     CODEC_ID_SMC,
  85     CODEC_ID_FLIC,
  86     CODEC_ID_TRUEMOTION1,
  87     CODEC_ID_VMDVIDEO,
  88     CODEC_ID_MSZH,
  89     CODEC_ID_ZLIB,
  90     CODEC_ID_QTRLE,
  91     CODEC_ID_SNOW,
  92     CODEC_ID_TSCC,
  93     CODEC_ID_ULTI,
  94     CODEC_ID_QDRAW,
  95     CODEC_ID_VIXL,
  96     CODEC_ID_QPEG,
  97     CODEC_ID_XVID,
  98     CODEC_ID_PNG,
  99     CODEC_ID_PPM,
 100     CODEC_ID_PBM,
 101     CODEC_ID_PGM,
 102     CODEC_ID_PGMYUV,
 103     CODEC_ID_PAM,
 104     CODEC_ID_FFVHUFF,
 105     CODEC_ID_RV30,
 106     CODEC_ID_RV40,
 107     CODEC_ID_VC9,
 108     CODEC_ID_WMV3,
 109     CODEC_ID_LOCO,
 110     CODEC_ID_WNV1,
 111     CODEC_ID_AASC,
 112     CODEC_ID_INDEO2,
 113     CODEC_ID_FRAPS,
 114     CODEC_ID_TRUEMOTION2,
 115
 116     /* various pcm "codecs" */
 117     CODEC_ID_PCM_S16LE= 0x10000,
 118     CODEC_ID_PCM_S16BE,
 119     CODEC_ID_PCM_U16LE,
 120     CODEC_ID_PCM_U16BE,
 121     CODEC_ID_PCM_S8,
 122     CODEC_ID_PCM_U8,
 123     CODEC_ID_PCM_MULAW,
 124     CODEC_ID_PCM_ALAW,
 125     CODEC_ID_PCM_S32LE,
 126     CODEC_ID_PCM_S32BE,
 127     CODEC_ID_PCM_U32LE,
 128     CODEC_ID_PCM_U32BE,
 129     CODEC_ID_PCM_S24LE,
 130     CODEC_ID_PCM_S24BE,
 131     CODEC_ID_PCM_U24LE,
 132     CODEC_ID_PCM_U24BE,
 133     CODEC_ID_PCM_S24DAUD,
 134
 135     /* various adpcm codecs */
 136     CODEC_ID_ADPCM_IMA_QT= 0x11000,
 137     CODEC_ID_ADPCM_IMA_WAV,
 138     CODEC_ID_ADPCM_IMA_DK3,
 139     CODEC_ID_ADPCM_IMA_DK4,
 140     CODEC_ID_ADPCM_IMA_WS,
 141     CODEC_ID_ADPCM_IMA_SMJPEG,
 142     CODEC_ID_ADPCM_MS,
 143     CODEC_ID_ADPCM_4XM,
 144     CODEC_ID_ADPCM_XA,
 145     CODEC_ID_ADPCM_ADX,
 146     CODEC_ID_ADPCM_EA,
 147     CODEC_ID_ADPCM_G726,
 148     CODEC_ID_ADPCM_CT,
 149     CODEC_ID_ADPCM_SWF,
 150     CODEC_ID_ADPCM_YAMAHA,
 151
 152     /* AMR */
 153     CODEC_ID_AMR_NB= 0x12000,
 154     CODEC_ID_AMR_WB,
 155
 156     /* RealAudio codecs*/
 157     CODEC_ID_RA_144= 0x13000,
 158     CODEC_ID_RA_288,
 159
 160     /* various DPCM codecs */
 161     CODEC_ID_ROQ_DPCM= 0x14000,
 162     CODEC_ID_INTERPLAY_DPCM,
 163     CODEC_ID_XAN_DPCM,
 164     CODEC_ID_SOL_DPCM,
 165
 166     CODEC_ID_MP2= 0x15000,
 167     CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
 168     CODEC_ID_AAC,
 169     CODEC_ID_MPEG4AAC,
 170     CODEC_ID_AC3,
 171     CODEC_ID_DTS,
 172     CODEC_ID_VORBIS,
 173     CODEC_ID_DVAUDIO,
 174     CODEC_ID_WMAV1,
 175     CODEC_ID_WMAV2,
 176     CODEC_ID_MACE3,
 177     CODEC_ID_MACE6,
 178     CODEC_ID_VMDAUDIO,
 179     CODEC_ID_SONIC,
 180     CODEC_ID_SONIC_LS,
 181     CODEC_ID_FLAC,
 182     CODEC_ID_MP3ADU,
 183     CODEC_ID_MP3ON4,
 184     CODEC_ID_SHORTEN,
 185     CODEC_ID_ALAC,
 186     CODEC_ID_WESTWOOD_SND1,
 187     CODEC_ID_GSM,
 188     CODEC_ID_QDM2,
 189
 190     CODEC_ID_OGGTHEORA= 0x16000,
 191
 192     /* subtitle codecs */
 193     CODEC_ID_DVD_SUBTITLE= 0x17000,
 194     CODEC_ID_DVB_SUBTITLE,
 195
 196     CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
 197                          stream (only used by libavformat) */
 198 };
 199
 200 /* CODEC_ID_MP3LAME is absolete */
 201 #define CODEC_ID_MP3LAME CODEC_ID_MP3
 202
 203 enum CodecType {
 204     CODEC_TYPE_UNKNOWN = -1,
 205     CODEC_TYPE_VIDEO,
 206     CODEC_TYPE_AUDIO,
 207     CODEC_TYPE_DATA,
 208     CODEC_TYPE_SUBTITLE,
 209 };
 210
 211 /**
 212  * Pixel format. Notes:
 213  *
 214  * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
 215  * color is put together as:
 216  *  (A << 24) | (R << 16) | (G << 8) | B
 217  * This is stored as BGRA on little endian CPU architectures and ARGB on
 218  * big endian CPUs.
 219  *
 220  * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
 221  * image data is stored in AVFrame.data[0]. The palette is transported in
 222  * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
 223  * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
 224  * also endian-specific). Note also that the individual RGB palette
 225  * components stored in AVFrame.data[1] should be in the range 0..255.
 226  * This is important as many custom PAL8 video codecs that were designed
 227  * to run on the IBM VGA graphics adapter use 6-bit palette components.
 228  */
 229 enum PixelFormat {
 230     PIX_FMT_NONE= -1,
 231     PIX_FMT_YUV420P,   ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
 232     PIX_FMT_YUV422,    ///< Packed pixel, Y0 Cb Y1 Cr
 233     PIX_FMT_RGB24,     ///< Packed pixel, 3 bytes per pixel, RGBRGB...
 234     PIX_FMT_BGR24,     ///< Packed pixel, 3 bytes per pixel, BGRBGR...
 235     PIX_FMT_YUV422P,   ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
 236     PIX_FMT_YUV444P,   ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
 237     PIX_FMT_RGBA32,    ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
 238     PIX_FMT_YUV410P,   ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
 239     PIX_FMT_YUV411P,   ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
 240     PIX_FMT_RGB565,    ///< always stored in cpu endianness
 241     PIX_FMT_RGB555,    ///< always stored in cpu endianness, most significant bit to 1
 242     PIX_FMT_GRAY8,
 243     PIX_FMT_MONOWHITE, ///< 0 is white
 244     PIX_FMT_MONOBLACK, ///< 0 is black
 245     PIX_FMT_PAL8,      ///< 8 bit with RGBA palette
 246     PIX_FMT_YUVJ420P,  ///< Planar YUV 4:2:0 full scale (jpeg)
 247     PIX_FMT_YUVJ422P,  ///< Planar YUV 4:2:2 full scale (jpeg)
 248     PIX_FMT_YUVJ444P,  ///< Planar YUV 4:4:4 full scale (jpeg)
 249     PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
 250     PIX_FMT_XVMC_MPEG2_IDCT,
 251     PIX_FMT_UYVY422,   ///< Packed pixel, Cb Y0 Cr Y1
 252     PIX_FMT_UYVY411,   ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
 253     PIX_FMT_NB,
 254 };
 255
 256 /* currently unused, may be used if 24/32 bits samples ever supported */
 257 enum SampleFormat {
 258     SAMPLE_FMT_S16 = 0,         ///< signed 16 bits
 259     SAMPLE_FMT_S32,             ///< signed 32 bits
 260     SAMPLE_FMT_FLT,             ///< float
 261     SAMPLE_FMT_DBL,             ///< double
 262 };
 263
 264 /* in bytes */
 265 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
 266
 267 /**
 268  * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
 269  * this is mainly needed because some optimized bitstream readers read
 270  * 32 or 64 bit at once and could read over the end<br>
 271  * Note, if the first 23 bits of the additional bytes are not 0 then damaged
 272  * MPEG bitstreams could cause overread and segfault
 273  */
 274 #define FF_INPUT_BUFFER_PADDING_SIZE 8
 275
 276 /**
 277  * minimum encoding buffer size.
 278  * used to avoid some checks during header writing
 279  */
 280 #define FF_MIN_BUFFER_SIZE 16384
 281
 282 /* motion estimation type, EPZS by default */
 283 enum Motion_Est_ID {
 284     ME_ZERO = 1,
 285     ME_FULL,
 286     ME_LOG,
 287     ME_PHODS,
 288     ME_EPZS,
 289     ME_X1
 290 };
 291
 292 enum AVDiscard{
 293 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
 294     AVDISCARD_NONE   =-16, ///< discard nothing
 295     AVDISCARD_DEFAULT=  0, ///< discard useless packets like 0 size packets in avi
 296     AVDISCARD_NONREF =  8, ///< discard all non reference
 297     AVDISCARD_BIDIR  = 16, ///< discard all bidirectional frames
 298     AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
 299     AVDISCARD_ALL    = 48, ///< discard all
 300 };
 301
 302 typedef struct RcOverride{
 303     int start_frame;
 304     int end_frame;
 305     int qscale; // if this is 0 then quality_factor will be used instead
 306     float quality_factor;
 307 } RcOverride;
 308
 309 /* only for ME compatiblity with old apps */
 310 extern int motion_estimation_method;
 311
 312 #define FF_MAX_B_FRAMES 8
 313
 314 /* encoding support
 315    these flags can be passed in AVCodecContext.flags before initing
 316    Note: not everything is supported yet.
 317 */
 318
 319 #define CODEC_FLAG_QSCALE 0x0002  ///< use fixed qscale
 320 #define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed / Advanced prediction for H263
 321 #define CODEC_FLAG_QPEL   0x0010  ///< use qpel MC
 322 #define CODEC_FLAG_GMC    0x0020  ///< use GMC
 323 #define CODEC_FLAG_MV0    0x0040  ///< always try a MB with MV=<0,0>
 324 #define CODEC_FLAG_PART   0x0080  ///< use data partitioning
 325 /* parent program gurantees that the input for b-frame containing streams is not written to
 326    for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
 327 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
 328 #define CODEC_FLAG_PASS1 0x0200   ///< use internal 2pass ratecontrol in first  pass mode
 329 #define CODEC_FLAG_PASS2 0x0400   ///< use internal 2pass ratecontrol in second pass mode
 330 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
 331 #define CODEC_FLAG_GRAY  0x2000   ///< only decode/encode grayscale
 332 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
 333 #define CODEC_FLAG_PSNR           0x8000 ///< error[?] variables will be set during encoding
 334 #define CODEC_FLAG_TRUNCATED  0x00010000 /** input bitstream might be truncated at a random location instead
 335                                             of only at frame boundaries */
 336 #define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< normalize adaptive quantization
 337 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
 338 #define CODEC_FLAG_LOW_DELAY      0x00080000 ///< force low delay
 339 #define CODEC_FLAG_ALT_SCAN       0x00100000 ///< use alternate scan
 340 #define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< use trellis quantization
 341 #define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< place global headers in extradata instead of every keyframe
 342 #define CODEC_FLAG_BITEXACT       0x00800000 ///< use only bitexact stuff (except (i)dct)
 343 /* Fx : Flag for h263+ extra options */
 344 #define CODEC_FLAG_H263P_AIC      0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
 345 #define CODEC_FLAG_AC_PRED        0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
 346 #define CODEC_FLAG_H263P_UMV      0x02000000 ///< Unlimited motion vector
 347 #define CODEC_FLAG_CBP_RD         0x04000000 ///< use rate distortion optimization for cbp
 348 #define CODEC_FLAG_QP_RD          0x08000000 ///< use rate distortion optimization for qp selectioon
 349 #define CODEC_FLAG_H263P_AIV      0x00000008 ///< H263 Alternative inter vlc
 350 #define CODEC_FLAG_OBMC           0x00000001 ///< OBMC
 351 #define CODEC_FLAG_LOOP_FILTER    0x00000800 ///< loop filter
 352 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
 353 #define CODEC_FLAG_INTERLACED_ME  0x20000000 ///< interlaced motion estimation
 354 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
 355 #define CODEC_FLAG_CLOSED_GOP     0x80000000
 356 #define CODEC_FLAG2_FAST          0x00000001 ///< allow non spec compliant speedup tricks
 357 #define CODEC_FLAG2_STRICT_GOP    0x00000002 ///< strictly enforce GOP size
 358 #define CODEC_FLAG2_NO_OUTPUT     0x00000004 ///< skip bitstream encoding
 359 #define CODEC_FLAG2_LOCAL_HEADER  0x00000008 ///< place global headers at every keyframe instead of in extradata
 360
 361 /* Unsupported options :
 362  *              Syntax Arithmetic coding (SAC)
 363  *              Reference Picture Selection
 364  *              Independant Segment Decoding */
 365 /* /Fx */
 366 /* codec capabilities */
 367
 368 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
 369 /**
 370  * Codec uses get_buffer() for allocating buffers.
 371  * direct rendering method 1
 372  */
 373 #define CODEC_CAP_DR1             0x0002
 374 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
 375    used */
 376 #define CODEC_CAP_PARSE_ONLY      0x0004
 377 #define CODEC_CAP_TRUNCATED       0x0008
 378 /* codec can export data for HW decoding (XvMC) */
 379 #define CODEC_CAP_HWACCEL         0x0010
 380 /**
 381  * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
 382  * if this is not set, the codec is guranteed to never be feeded with NULL data
 383  */
 384 #define CODEC_CAP_DELAY           0x0020
 385
 386 //the following defines may change, don't expect compatibility if you use them
 387 #define MB_TYPE_INTRA4x4   0x0001
 388 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
 389 #define MB_TYPE_INTRA_PCM  0x0004 //FIXME h264 specific
 390 #define MB_TYPE_16x16      0x0008
 391 #define MB_TYPE_16x8       0x0010
 392 #define MB_TYPE_8x16       0x0020
 393 #define MB_TYPE_8x8        0x0040
 394 #define MB_TYPE_INTERLACED 0x0080
 395 #define MB_TYPE_DIRECT2     0x0100 //FIXME
 396 #define MB_TYPE_ACPRED     0x0200
 397 #define MB_TYPE_GMC        0x0400
 398 #define MB_TYPE_SKIP       0x0800
 399 #define MB_TYPE_P0L0       0x1000
 400 #define MB_TYPE_P1L0       0x2000
 401 #define MB_TYPE_P0L1       0x4000
 402 #define MB_TYPE_P1L1       0x8000
 403 #define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
 404 #define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
 405 #define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
 406 #define MB_TYPE_QUANT      0x00010000
 407 #define MB_TYPE_CBP        0x00020000
 408 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
 409
 410 /**
 411  * Pan Scan area.
 412  * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
 413  */
 414 typedef struct AVPanScan{
 415     /**
 416      * id.
 417      * - encoding: set by user.
 418      * - decoding: set by lavc
 419      */
 420     int id;
 421
 422     /**
 423      * width and height in 1/16 pel
 424      * - encoding: set by user.
 425      * - decoding: set by lavc
 426      */
 427     int width;
 428     int height;
 429
 430     /**
 431      * position of the top left corner in 1/16 pel for up to 3 fields/frames.
 432      * - encoding: set by user.
 433      * - decoding: set by lavc
 434      */
 435     int16_t position[3][2];
 436 }AVPanScan;
 437
 438 #define FF_COMMON_FRAME \
 439     /**\
 440      * pointer to the picture planes.\
 441      * this might be different from the first allocated byte\
 442      * - encoding: \
 443      * - decoding: \
 444      */\
 445     uint8_t *data[4];\
 446     int linesize[4];\
 447     /**\
 448      * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
 449      * this isn't used by lavc unless the default get/release_buffer() is used\
 450      * - encoding: \
 451      * - decoding: \
 452      */\
 453     uint8_t *base[4];\
 454     /**\
 455      * 1 -> keyframe, 0-> not\
 456      * - encoding: set by lavc\
 457      * - decoding: set by lavc\
 458      */\
 459     int key_frame;\
 460 \
 461     /**\
 462      * picture type of the frame, see ?_TYPE below.\
 463      * - encoding: set by lavc for coded_picture (and set by user for input)\
 464      * - decoding: set by lavc\
 465      */\
 466     int pict_type;\
 467 \
 468     /**\
 469      * presentation timestamp in time_base units (time when frame should be shown to user)\
 470      * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
 471      * - encoding: MUST be set by user\
 472      * - decoding: set by lavc\
 473      */\
 474     int64_t pts;\
 475 \
 476     /**\
 477      * picture number in bitstream order.\
 478      * - encoding: set by\
 479      * - decoding: set by lavc\
 480      */\
 481     int coded_picture_number;\
 482     /**\
 483      * picture number in display order.\
 484      * - encoding: set by\
 485      * - decoding: set by lavc\
 486      */\
 487     int display_picture_number;\
 488 \
 489     /**\
 490      * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
 491      * - encoding: set by lavc for coded_picture (and set by user for input)\
 492      * - decoding: set by lavc\
 493      */\
 494     int quality; \
 495 \
 496     /**\
 497      * buffer age (1->was last buffer and dint change, 2->..., ...).\
 498      * set to INT_MAX if the buffer has not been used yet \
 499      * - encoding: unused\
 500      * - decoding: MUST be set by get_buffer()\
 501      */\
 502     int age;\
 503 \
 504     /**\
 505      * is this picture used as reference\
 506      * - encoding: unused\
 507      * - decoding: set by lavc (before get_buffer() call))\
 508      */\
 509     int reference;\
 510 \
 511     /**\
 512      * QP table\
 513      * - encoding: unused\
 514      * - decoding: set by lavc\
 515      */\
 516     int8_t *qscale_table;\
 517     /**\
 518      * QP store stride\
 519      * - encoding: unused\
 520      * - decoding: set by lavc\
 521      */\
 522     int qstride;\
 523 \
 524     /**\
 525      * mbskip_table[mb]>=1 if MB didnt change\
 526      * stride= mb_width = (width+15)>>4\
 527      * - encoding: unused\
 528      * - decoding: set by lavc\
 529      */\
 530     uint8_t *mbskip_table;\
 531 \
 532     /**\
 533      * Motion vector table.\
 534      * @code\
 535      * example:\
 536      * int mv_sample_log2= 4 - motion_subsample_log2;\
 537      * int mb_width= (width+15)>>4;\
 538      * int mv_stride= (mb_width << mv_sample_log2) + 1;\
 539      * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
 540      * @endcode\
 541      * - encoding: set by user\
 542      * - decoding: set by lavc\
 543      */\
 544     int16_t (*motion_val[2])[2];\
 545 \
 546     /**\
 547      * Macroblock type table\
 548      * mb_type_base + mb_width + 2\
 549      * - encoding: set by user\
 550      * - decoding: set by lavc\
 551      */\
 552     uint32_t *mb_type;\
 553 \
 554     /**\
 555      * log2 of the size of the block which a single vector in motion_val represents: \
 556      * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
 557      * - encoding: unused\
 558      * - decoding: set by lavc\
 559      */\
 560     uint8_t motion_subsample_log2;\
 561 \
 562     /**\
 563      * for some private data of the user\
 564      * - encoding: unused\
 565      * - decoding: set by user\
 566      */\
 567     void *opaque;\
 568 \
 569     /**\
 570      * error\
 571      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
 572      * - decoding: unused\
 573      */\
 574     uint64_t error[4];\
 575 \
 576     /**\
 577      * type of the buffer (to keep track of who has to dealloc data[*])\
 578      * - encoding: set by the one who allocs it\
 579      * - decoding: set by the one who allocs it\
 580      * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
 581      */\
 582     int type;\
 583     \
 584     /**\
 585      * when decoding, this signal how much the picture must be delayed.\
 586      * extra_delay = repeat_pict / (2*fps)\
 587      * - encoding: unused\
 588      * - decoding: set by lavc\
 589      */\
 590     int repeat_pict;\
 591     \
 592     /**\
 593      * \
 594      */\
 595     int qscale_type;\
 596     \
 597     /**\
 598      * The content of the picture is interlaced.\
 599      * - encoding: set by user\
 600      * - decoding: set by lavc (default 0)\
 601      */\
 602     int interlaced_frame;\
 603     \
 604     /**\
 605      * if the content is interlaced, is top field displayed first.\
 606      * - encoding: set by user\
 607      * - decoding: set by lavc\
 608      */\
 609     int top_field_first;\
 610     \
 611     /**\
 612      * Pan scan.\
 613      * - encoding: set by user\
 614      * - decoding: set by lavc\
 615      */\
 616     AVPanScan *pan_scan;\
 617     \
 618     /**\
 619      * tell user application that palette has changed from previous frame.\
 620      * - encoding: ??? (no palette-enabled encoder yet)\
 621      * - decoding: set by lavc (default 0)\
 622      */\
 623     int palette_has_changed;\
 624     \
 625     /**\
 626      * Codec suggestion on buffer type if != 0\
 627      * - encoding: unused\
 628      * - decoding: set by lavc (before get_buffer() call))\
 629      */\
 630     int buffer_hints;\
 631 \
 632     /**\
 633      * DCT coeffitients\
 634      * - encoding: unused\
 635      * - decoding: set by lavc\
 636      */\
 637     short *dct_coeff;\
 638 \
 639     /**\
 640      * Motion referece frame index\
 641      * - encoding: set by user\
 642      * - decoding: set by lavc\
 643      */\
 644     int8_t *ref_index[2];
 645
 646 #define FF_QSCALE_TYPE_MPEG1    0
 647 #define FF_QSCALE_TYPE_MPEG2    1
 648
 649 #define FF_BUFFER_TYPE_INTERNAL 1
 650 #define FF_BUFFER_TYPE_USER     2 ///< Direct rendering buffers (image is (de)allocated by user)
 651 #define FF_BUFFER_TYPE_SHARED   4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
 652 #define FF_BUFFER_TYPE_COPY     8 ///< just a (modified) copy of some other buffer, don't dealloc anything
 653
 654
 655 #define FF_I_TYPE 1 // Intra
 656 #define FF_P_TYPE 2 // Predicted
 657 #define FF_B_TYPE 3 // Bi-dir predicted
 658 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
 659 #define FF_SI_TYPE 5
 660 #define FF_SP_TYPE 6
 661
 662 #define FF_BUFFER_HINTS_VALID    0x01 // Buffer hints value is meaningful (if 0 ignore)
 663 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
 664 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
 665 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
 666
 667 /**
 668  * Audio Video Frame.
 669  */
 670 typedef struct AVFrame {
 671     FF_COMMON_FRAME
 672 } AVFrame;
 673
 674 #define DEFAULT_FRAME_RATE_BASE 1001000
 675
 676 /**
 677  * Used by av_log
 678  */
 679 typedef struct AVCLASS AVClass;
 680 struct AVCLASS {
 681     const char* class_name;
 682     const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
 683                                         or AVFormatContext, which begin with an AVClass.
 684                                         Needed because av_log is in libavcodec and has no visibility
 685                                         of AVIn/OutputFormat */
 686     struct AVOption *option;
 687 };
 688
 689 /**
 690  * main external api structure.
 691  */
 692 typedef struct AVCodecContext {
 693     /**
 694      * Info on struct for av_log
 695      * - set by avcodec_alloc_context
 696      */
 697     AVClass *av_class;
 698     /**
 699      * the average bitrate.
 700      * - encoding: set by user. unused for constant quantizer encoding
 701      * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
 702      */
 703     int bit_rate;
 704
 705     /**
 706      * number of bits the bitstream is allowed to diverge from the reference.
 707      *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
 708      * - encoding: set by user. unused for constant quantizer encoding
 709      * - decoding: unused
 710      */
 711     int bit_rate_tolerance;
 712
 713     /**
 714      * CODEC_FLAG_*.
 715      * - encoding: set by user.
 716      * - decoding: set by user.
 717      */
 718     int flags;
 719
 720     /**
 721      * some codecs needs additionnal format info. It is stored here
 722      * - encoding: set by user.
 723      * - decoding: set by lavc. (FIXME is this ok?)
 724      */
 725     int sub_id;
 726
 727     /**
 728      * motion estimation algorithm used for video coding.
 729      * - encoding: MUST be set by user.
 730      * - decoding: unused
 731      */
 732     int me_method;
 733
 734     /**
 735      * some codecs need / can use extra-data like huffman tables.
 736      * mjpeg: huffman tables
 737      * rv10: additional flags
 738      * mpeg4: global headers (they can be in the bitstream or here)
 739      * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
 740      * then extradata_size to avoid prolems if its read with the bitstream reader
 741      * - encoding: set/allocated/freed by lavc.
 742      * - decoding: set/allocated/freed by user.
 743      */
 744     void *extradata;
 745     int extradata_size;
 746
 747     /**
 748      * this is the fundamental unit of time (in seconds) in terms
 749      * of which frame timestamps are represented. for fixed-fps content,
 750      * timebase should be 1/framerate and timestamp increments should be
 751      * identically 1.
 752      * - encoding: MUST be set by user
 753      * - decoding: set by lavc.
 754      */
 755     AVRational time_base;
 756
 757     /* video only */
 758     /**
 759      * picture width / height.
 760      * - encoding: MUST be set by user.
 761      * - decoding: set by lavc.
 762      * Note, for compatibility its possible to set this instead of
 763      * coded_width/height before decoding
 764      */
 765     int width, height;
 766
 767 #define FF_ASPECT_EXTENDED 15
 768
 769     /**
 770      * the number of pictures in a group of pitures, or 0 for intra_only.
 771      * - encoding: set by user.
 772      * - decoding: unused
 773      */
 774     int gop_size;
 775
 776     /**
 777      * pixel format, see PIX_FMT_xxx.
 778      * - encoding: set by user.
 779      * - decoding: set by lavc.
 780      */
 781     enum PixelFormat pix_fmt;
 782
 783     /**
 784      * Frame rate emulation. If not zero lower layer (i.e. format handler)
 785      * has to read frames at native frame rate.
 786      * - encoding: set by user.
 787      * - decoding: unused.
 788      */
 789     int rate_emu;
 790
 791     /**
 792      * if non NULL, 'draw_horiz_band' is called by the libavcodec
 793      * decoder to draw an horizontal band. It improve cache usage. Not
 794      * all codecs can do that. You must check the codec capabilities
 795      * before
 796      * - encoding: unused
 797      * - decoding: set by user.
 798      * @param height the height of the slice
 799      * @param y the y position of the slice
 800      * @param type 1->top field, 2->bottom field, 3->frame
 801      * @param offset offset into the AVFrame.data from which the slice should be read
 802      */
 803     void (*draw_horiz_band)(struct AVCodecContext *s,
 804                             const AVFrame *src, int offset[4],
 805                             int y, int type, int height);
 806
 807     /* audio only */
 808     int sample_rate; ///< samples per sec
 809     int channels;
 810
 811     /**
 812      * audio sample format.
 813      * - encoding: set by user.
 814      * - decoding: set by lavc.
 815      */
 816     enum SampleFormat sample_fmt;  ///< sample format, currenly unused
 817
 818     /* the following data should not be initialized */
 819     /**
 820      * samples per packet. initialized when calling 'init'
 821      */
 822     int frame_size;
 823     int frame_number;   ///< audio or video frame number
 824     int real_pict_num;  ///< returns the real picture number of previous encoded frame
 825
 826     /**
 827      * number of frames the decoded output will be delayed relative to
 828      * the encoded input.
 829      * - encoding: set by lavc.
 830      * - decoding: unused
 831      */
 832     int delay;
 833
 834     /* - encoding parameters */
 835     float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
 836     float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
 837
 838     /**
 839      * minimum quantizer.
 840      * - encoding: set by user.
 841      * - decoding: unused
 842      */
 843     int qmin;
 844
 845     /**
 846      * maximum quantizer.
 847      * - encoding: set by user.
 848      * - decoding: unused
 849      */
 850     int qmax;
 851
 852     /**
 853      * maximum quantizer difference etween frames.
 854      * - encoding: set by user.
 855      * - decoding: unused
 856      */
 857     int max_qdiff;
 858
 859     /**
 860      * maximum number of b frames between non b frames.
 861      * note: the output will be delayed by max_b_frames+1 relative to the input
 862      * - encoding: set by user.
 863      * - decoding: unused
 864      */
 865     int max_b_frames;
 866
 867     /**
 868      * qscale factor between ip and b frames.
 869      * - encoding: set by user.
 870      * - decoding: unused
 871      */
 872     float b_quant_factor;
 873
 874     /** obsolete FIXME remove */
 875     int rc_strategy;
 876     int b_frame_strategy;
 877
 878     /**
 879      * hurry up amount.
 880      * deprecated in favor of skip_idct and skip_frame
 881      * - encoding: unused
 882      * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
 883      */
 884     int hurry_up;
 885
 886     struct AVCodec *codec;
 887
 888     void *priv_data;
 889
 890     /* unused, FIXME remove*/
 891     int rtp_mode;
 892
 893     int rtp_payload_size;   /* The size of the RTP payload: the coder will  */
 894                             /* do it's best to deliver a chunk with size    */
 895                             /* below rtp_payload_size, the chunk will start */
 896                             /* with a start code on some codecs like H.263  */
 897                             /* This doesn't take account of any particular  */
 898                             /* headers inside the transmited RTP payload    */
 899
 900
 901     /* The RTP callback: This function is called   */
 902     /* every time the encoder has a packet to send */
 903     /* Depends on the encoder if the data starts   */
 904     /* with a Start Code (it should) H.263 does.   */
 905     /* mb_nb contains the number of macroblocks    */
 906     /* encoded in the RTP payload                  */
 907     void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
 908
 909     /* statistics, used for 2-pass encoding */
 910     int mv_bits;
 911     int header_bits;
 912     int i_tex_bits;
 913     int p_tex_bits;
 914     int i_count;
 915     int p_count;
 916     int skip_count;
 917     int misc_bits;
 918
 919     /**
 920      * number of bits used for the previously encoded frame.
 921      * - encoding: set by lavc
 922      * - decoding: unused
 923      */
 924     int frame_bits;
 925
 926     /**
 927      * private data of the user, can be used to carry app specific stuff.
 928      * - encoding: set by user
 929      * - decoding: set by user
 930      */
 931     void *opaque;
 932
 933     char codec_name[32];
 934     enum CodecType codec_type; /* see CODEC_TYPE_xxx */
 935     enum CodecID codec_id; /* see CODEC_ID_xxx */
 936
 937     /**
 938      * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
 939      * this is used to workaround some encoder bugs
 940      * - encoding: set by user, if not then the default based on codec_id will be used
 941      * - decoding: set by user, will be converted to upper case by lavc during init
 942      */
 943     unsigned int codec_tag;
 944
 945     /**
 946      * workaround bugs in encoders which sometimes cannot be detected automatically.
 947      * - encoding: set by user
 948      * - decoding: set by user
 949      */
 950     int workaround_bugs;
 951 #define FF_BUG_AUTODETECT       1  ///< autodetection
 952 #define FF_BUG_OLD_MSMPEG4      2
 953 #define FF_BUG_XVID_ILACE       4
 954 #define FF_BUG_UMP4             8
 955 #define FF_BUG_NO_PADDING       16
 956 #define FF_BUG_AMV              32
 957 #define FF_BUG_AC_VLC           0  ///< will be removed, libavcodec can now handle these non compliant files by default
 958 #define FF_BUG_QPEL_CHROMA      64
 959 #define FF_BUG_STD_QPEL         128
 960 #define FF_BUG_QPEL_CHROMA2     256
 961 #define FF_BUG_DIRECT_BLOCKSIZE 512
 962 #define FF_BUG_EDGE             1024
 963 #define FF_BUG_HPEL_CHROMA      2048
 964 #define FF_BUG_DC_CLIP          4096
 965 #define FF_BUG_MS               8192 ///< workaround various bugs in microsofts broken decoders
 966 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
 967
 968     /**
 969      * luma single coeff elimination threshold.
 970      * - encoding: set by user
 971      * - decoding: unused
 972      */
 973     int luma_elim_threshold;
 974
 975     /**
 976      * chroma single coeff elimination threshold.
 977      * - encoding: set by user
 978      * - decoding: unused
 979      */
 980     int chroma_elim_threshold;
 981
 982     /**
 983      * strictly follow the std (MPEG4, ...).
 984      * - encoding: set by user
 985      * - decoding: unused
 986      */
 987     int strict_std_compliance;
 988 #define FF_COMPLIANCE_VERY_STRICT   2 ///< strictly conform to a older more strict version of the spec or reference software
 989 #define FF_COMPLIANCE_STRICT        1 ///< strictly conform to all the things in the spec no matter what consequences
 990 #define FF_COMPLIANCE_NORMAL        0
 991 #define FF_COMPLIANCE_INOFFICIAL   -1 ///< allow inofficial extensions
 992 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
 993
 994     /**
 995      * qscale offset between ip and b frames.
 996      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
 997      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
 998      * - encoding: set by user.
 999      * - decoding: unused
1000      */
1001     float b_quant_offset;
1002
1003     /**
1004      * error resilience higher values will detect more errors but may missdetect
1005      * some more or less valid parts as errors.
1006      * - encoding: unused
1007      * - decoding: set by user
1008      */
1009     int error_resilience;
1010 #define FF_ER_CAREFUL         1
1011 #define FF_ER_COMPLIANT       2
1012 #define FF_ER_AGGRESSIVE      3
1013 #define FF_ER_VERY_AGGRESSIVE 4
1014
1015     /**
1016      * called at the beginning of each frame to get a buffer for it.
1017      * if pic.reference is set then the frame will be read later by lavc
1018      * avcodec_align_dimensions() should be used to find the required width and
1019      * height, as they normally need to be rounded up to the next multiple of 16
1020      * - encoding: unused
1021      * - decoding: set by lavc, user can override
1022      */
1023     int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1024
1025     /**
1026      * called to release buffers which where allocated with get_buffer.
1027      * a released buffer can be reused in get_buffer()
1028      * pic.data[*] must be set to NULL
1029      * - encoding: unused
1030      * - decoding: set by lavc, user can override
1031      */
1032     void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1033
1034     /**
1035      * if 1 the stream has a 1 frame delay during decoding.
1036      * - encoding: set by lavc
1037      * - decoding: set by lavc
1038      */
1039     int has_b_frames;
1040
1041     /**
1042      * number of bytes per packet if constant and known or 0
1043      * used by some WAV based audio codecs
1044      */
1045     int block_align;
1046
1047     int parse_only; /* - decoding only: if true, only parsing is done
1048                        (function avcodec_parse_frame()). The frame
1049                        data is returned. Only MPEG codecs support this now. */
1050
1051     /**
1052      * 0-> h263 quant 1-> mpeg quant.
1053      * - encoding: set by user.
1054      * - decoding: unused
1055      */
1056     int mpeg_quant;
1057
1058     /**
1059      * pass1 encoding statistics output buffer.
1060      * - encoding: set by lavc
1061      * - decoding: unused
1062      */
1063     char *stats_out;
1064
1065     /**
1066      * pass2 encoding statistics input buffer.
1067      * concatenated stuff from stats_out of pass1 should be placed here
1068      * - encoding: allocated/set/freed by user
1069      * - decoding: unused
1070      */
1071     char *stats_in;
1072
1073     /**
1074      * ratecontrol qmin qmax limiting method.
1075      * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1076      * - encoding: set by user.
1077      * - decoding: unused
1078      */
1079     float rc_qsquish;
1080
1081     float rc_qmod_amp;
1082     int rc_qmod_freq;
1083
1084     /**
1085      * ratecontrol override, see RcOverride.
1086      * - encoding: allocated/set/freed by user.
1087      * - decoding: unused
1088      */
1089     RcOverride *rc_override;
1090     int rc_override_count;
1091
1092     /**
1093      * rate control equation.
1094      * - encoding: set by user
1095      * - decoding: unused
1096      */
1097     char *rc_eq;
1098
1099     /**
1100      * maximum bitrate.
1101      * - encoding: set by user.
1102      * - decoding: unused
1103      */
1104     int rc_max_rate;
1105
1106     /**
1107      * minimum bitrate.
1108      * - encoding: set by user.
1109      * - decoding: unused
1110      */
1111     int rc_min_rate;
1112
1113     /**
1114      * decoder bitstream buffer size.
1115      * - encoding: set by user.
1116      * - decoding: unused
1117      */
1118     int rc_buffer_size;
1119     float rc_buffer_aggressivity;
1120
1121     /**
1122      * qscale factor between p and i frames.
1123      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1124      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1125      * - encoding: set by user.
1126      * - decoding: unused
1127      */
1128     float i_quant_factor;
1129
1130     /**
1131      * qscale offset between p and i frames.
1132      * - encoding: set by user.
1133      * - decoding: unused
1134      */
1135     float i_quant_offset;
1136
1137     /**
1138      * initial complexity for pass1 ratecontrol.
1139      * - encoding: set by user.
1140      * - decoding: unused
1141      */
1142     float rc_initial_cplx;
1143
1144     /**
1145      * dct algorithm, see FF_DCT_* below.
1146      * - encoding: set by user
1147      * - decoding: unused
1148      */
1149     int dct_algo;
1150 #define FF_DCT_AUTO    0
1151 #define FF_DCT_FASTINT 1
1152 #define FF_DCT_INT     2
1153 #define FF_DCT_MMX     3
1154 #define FF_DCT_MLIB    4
1155 #define FF_DCT_ALTIVEC 5
1156 #define FF_DCT_FAAN    6
1157
1158     /**
1159      * luminance masking (0-> disabled).
1160      * - encoding: set by user
1161      * - decoding: unused
1162      */
1163     float lumi_masking;
1164
1165     /**
1166      * temporary complexity masking (0-> disabled).
1167      * - encoding: set by user
1168      * - decoding: unused
1169      */
1170     float temporal_cplx_masking;
1171
1172     /**
1173      * spatial complexity masking (0-> disabled).
1174      * - encoding: set by user
1175      * - decoding: unused
1176      */
1177     float spatial_cplx_masking;
1178
1179     /**
1180      * p block masking (0-> disabled).
1181      * - encoding: set by user
1182      * - decoding: unused
1183      */
1184     float p_masking;
1185
1186     /**
1187      * darkness masking (0-> disabled).
1188      * - encoding: set by user
1189      * - decoding: unused
1190      */
1191     float dark_masking;
1192
1193
1194     /* for binary compatibility */
1195     int unused;
1196
1197     /**
1198      * idct algorithm, see FF_IDCT_* below.
1199      * - encoding: set by user
1200      * - decoding: set by user
1201      */
1202     int idct_algo;
1203 #define FF_IDCT_AUTO         0
1204 #define FF_IDCT_INT          1
1205 #define FF_IDCT_SIMPLE       2
1206 #define FF_IDCT_SIMPLEMMX    3
1207 #define FF_IDCT_LIBMPEG2MMX  4
1208 #define FF_IDCT_PS2          5
1209 #define FF_IDCT_MLIB         6
1210 #define FF_IDCT_ARM          7
1211 #define FF_IDCT_ALTIVEC      8
1212 #define FF_IDCT_SH4          9
1213 #define FF_IDCT_SIMPLEARM    10
1214 #define FF_IDCT_H264         11
1215 #define FF_IDCT_VP3          12
1216 #define FF_IDCT_IPP          13
1217 #define FF_IDCT_XVIDMMX      14
1218
1219     /**
1220      * slice count.
1221      * - encoding: set by lavc
1222      * - decoding: set by user (or 0)
1223      */
1224     int slice_count;
1225     /**
1226      * slice offsets in the frame in bytes.
1227      * - encoding: set/allocated by lavc
1228      * - decoding: set/allocated by user (or NULL)
1229      */
1230     int *slice_offset;
1231
1232     /**
1233      * error concealment flags.
1234      * - encoding: unused
1235      * - decoding: set by user
1236      */
1237     int error_concealment;
1238 #define FF_EC_GUESS_MVS   1
1239 #define FF_EC_DEBLOCK     2
1240
1241     /**
1242      * dsp_mask could be add used to disable unwanted CPU features
1243      * CPU features (i.e. MMX, SSE. ...)
1244      *
1245      * with FORCE flag you may instead enable given CPU features
1246      * (Dangerous: usable in case of misdetection, improper usage however will
1247      * result into program crash)
1248      */
1249     unsigned dsp_mask;
1250 #define FF_MM_FORCE     0x80000000 /* force usage of selected flags (OR) */
1251     /* lower 16 bits - CPU features */
1252 #ifdef HAVE_MMX
1253 #define FF_MM_MMX       0x0001 /* standard MMX */
1254 #define FF_MM_3DNOW     0x0004 /* AMD 3DNOW */
1255 #define FF_MM_MMXEXT    0x0002 /* SSE integer functions or AMD MMX ext */
1256 #define FF_MM_SSE       0x0008 /* SSE functions */
1257 #define FF_MM_SSE2      0x0010 /* PIV SSE2 functions */
1258 #define FF_MM_3DNOWEXT  0x0020 /* AMD 3DNowExt */
1259 #endif /* HAVE_MMX */
1260 #ifdef HAVE_IWMMXT
1261 #define FF_MM_IWMMXT    0x0100 /* XScale IWMMXT */
1262 #endif /* HAVE_IWMMXT */
1263
1264     /**
1265      * bits per sample/pixel from the demuxer (needed for huffyuv).
1266      * - encoding: set by lavc
1267      * - decoding: set by user
1268      */
1269      int bits_per_sample;
1270
1271     /**
1272      * prediction method (needed for huffyuv).
1273      * - encoding: set by user
1274      * - decoding: unused
1275      */
1276      int prediction_method;
1277 #define FF_PRED_LEFT   0
1278 #define FF_PRED_PLANE  1
1279 #define FF_PRED_MEDIAN 2
1280
1281     /**
1282      * sample aspect ratio (0 if unknown).
1283      * numerator and denominator must be relative prime and smaller then 256 for some video standards
1284      * - encoding: set by user.
1285      * - decoding: set by lavc.
1286      */
1287     AVRational sample_aspect_ratio;
1288
1289     /**
1290      * the picture in the bitstream.
1291      * - encoding: set by lavc
1292      * - decoding: set by lavc
1293      */
1294     AVFrame *coded_frame;
1295
1296     /**
1297      * debug.
1298      * - encoding: set by user.
1299      * - decoding: set by user.
1300      */
1301     int debug;
1302 #define FF_DEBUG_PICT_INFO 1
1303 #define FF_DEBUG_RC        2
1304 #define FF_DEBUG_BITSTREAM 4
1305 #define FF_DEBUG_MB_TYPE   8
1306 #define FF_DEBUG_QP        16
1307 #define FF_DEBUG_MV        32
1308 #define FF_DEBUG_DCT_COEFF 0x00000040
1309 #define FF_DEBUG_SKIP      0x00000080
1310 #define FF_DEBUG_STARTCODE 0x00000100
1311 #define FF_DEBUG_PTS       0x00000200
1312 #define FF_DEBUG_ER        0x00000400
1313 #define FF_DEBUG_MMCO      0x00000800
1314 #define FF_DEBUG_BUGS      0x00001000
1315 #define FF_DEBUG_VIS_QP    0x00002000
1316 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1317
1318     /**
1319      * debug.
1320      * - encoding: set by user.
1321      * - decoding: set by user.
1322      */
1323     int debug_mv;
1324 #define FF_DEBUG_VIS_MV_P_FOR  0x00000001 //visualize forward predicted MVs of P frames
1325 #define FF_DEBUG_VIS_MV_B_FOR  0x00000002 //visualize forward predicted MVs of B frames
1326 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1327
1328     /**
1329      * error.
1330      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1331      * - decoding: unused
1332      */
1333     uint64_t error[4];
1334
1335     /**
1336      * minimum MB quantizer.
1337      * - encoding: unused
1338      * - decoding: unused
1339      */
1340     int mb_qmin;
1341
1342     /**
1343      * maximum MB quantizer.
1344      * - encoding: unused
1345      * - decoding: unused
1346      */
1347     int mb_qmax;
1348
1349     /**
1350      * motion estimation compare function.
1351      * - encoding: set by user.
1352      * - decoding: unused
1353      */
1354     int me_cmp;
1355     /**
1356      * subpixel motion estimation compare function.
1357      * - encoding: set by user.
1358      * - decoding: unused
1359      */
1360     int me_sub_cmp;
1361     /**
1362      * macroblock compare function (not supported yet).
1363      * - encoding: set by user.
1364      * - decoding: unused
1365      */
1366     int mb_cmp;
1367     /**
1368      * interlaced dct compare function
1369      * - encoding: set by user.
1370      * - decoding: unused
1371      */
1372     int ildct_cmp;
1373 #define FF_CMP_SAD  0
1374 #define FF_CMP_SSE  1
1375 #define FF_CMP_SATD 2
1376 #define FF_CMP_DCT  3
1377 #define FF_CMP_PSNR 4
1378 #define FF_CMP_BIT  5
1379 #define FF_CMP_RD   6
1380 #define FF_CMP_ZERO 7
1381 #define FF_CMP_VSAD 8
1382 #define FF_CMP_VSSE 9
1383 #define FF_CMP_NSSE 10
1384 #define FF_CMP_W53  11
1385 #define FF_CMP_W97  12
1386 #define FF_CMP_DCTMAX 13
1387 #define FF_CMP_CHROMA 256
1388
1389     /**
1390      * ME diamond size & shape.
1391      * - encoding: set by user.
1392      * - decoding: unused
1393      */
1394     int dia_size;
1395
1396     /**
1397      * amount of previous MV predictors (2a+1 x 2a+1 square).
1398      * - encoding: set by user.
1399      * - decoding: unused
1400      */
1401     int last_predictor_count;
1402
1403     /**
1404      * pre pass for motion estimation.
1405      * - encoding: set by user.
1406      * - decoding: unused
1407      */
1408     int pre_me;
1409
1410     /**
1411      * motion estimation pre pass compare function.
1412      * - encoding: set by user.
1413      * - decoding: unused
1414      */
1415     int me_pre_cmp;
1416
1417     /**
1418      * ME pre pass diamond size & shape.
1419      * - encoding: set by user.
1420      * - decoding: unused
1421      */
1422     int pre_dia_size;
1423
1424     /**
1425      * subpel ME quality.
1426      * - encoding: set by user.
1427      * - decoding: unused
1428      */
1429     int me_subpel_quality;
1430
1431     /**
1432      * callback to negotiate the pixelFormat.
1433      * @param fmt is the list of formats which are supported by the codec,
1434      * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1435      * the first is allways the native one
1436      * @return the choosen format
1437      * - encoding: unused
1438      * - decoding: set by user, if not set then the native format will always be choosen
1439      */
1440     enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1441
1442     /**
1443      * DTG active format information (additionnal aspect ratio
1444      * information only used in DVB MPEG2 transport streams). 0 if
1445      * not set.
1446      *
1447      * - encoding: unused.
1448      * - decoding: set by decoder
1449      */
1450     int dtg_active_format;
1451 #define FF_DTG_AFD_SAME         8
1452 #define FF_DTG_AFD_4_3          9
1453 #define FF_DTG_AFD_16_9         10
1454 #define FF_DTG_AFD_14_9         11
1455 #define FF_DTG_AFD_4_3_SP_14_9  13
1456 #define FF_DTG_AFD_16_9_SP_14_9 14
1457 #define FF_DTG_AFD_SP_4_3       15
1458
1459     /**
1460      * Maximum motion estimation search range in subpel units.
1461      * if 0 then no limit
1462      *
1463      * - encoding: set by user.
1464      * - decoding: unused.
1465      */
1466     int me_range;
1467
1468     /**
1469      * intra quantizer bias.
1470      * - encoding: set by user.
1471      * - decoding: unused
1472      */
1473     int intra_quant_bias;
1474 #define FF_DEFAULT_QUANT_BIAS 999999
1475
1476     /**
1477      * inter quantizer bias.
1478      * - encoding: set by user.
1479      * - decoding: unused
1480      */
1481     int inter_quant_bias;
1482
1483     /**
1484      * color table ID.
1485      * - encoding: unused.
1486      * - decoding: which clrtable should be used for 8bit RGB images
1487      *             table have to be stored somewhere FIXME
1488      */
1489     int color_table_id;
1490
1491     /**
1492      * internal_buffer count.
1493      * Don't touch, used by lavc default_get_buffer()
1494      */
1495     int internal_buffer_count;
1496
1497     /**
1498      * internal_buffers.
1499      * Don't touch, used by lavc default_get_buffer()
1500      */
1501     void *internal_buffer;
1502
1503 #define FF_LAMBDA_SHIFT 7
1504 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1505 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1506 #define FF_LAMBDA_MAX (256*128-1)
1507
1508 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1509     /**
1510      * global quality for codecs which cannot change it per frame.
1511      * this should be proportional to MPEG1/2/4 qscale.
1512      * - encoding: set by user.
1513      * - decoding: unused
1514      */
1515     int global_quality;
1516
1517 #define FF_CODER_TYPE_VLC   0
1518 #define FF_CODER_TYPE_AC    1
1519     /**
1520      * coder type
1521      * - encoding: set by user.
1522      * - decoding: unused
1523      */
1524     int coder_type;
1525
1526     /**
1527      * context model
1528      * - encoding: set by user.
1529      * - decoding: unused
1530      */
1531     int context_model;
1532
1533     /**
1534      * slice flags
1535      * - encoding: unused
1536      * - decoding: set by user.
1537      */
1538     int slice_flags;
1539 #define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1540 #define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1541 #define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1542
1543     /**
1544      * XVideo Motion Acceleration
1545      * - encoding: forbidden
1546      * - decoding: set by decoder
1547      */
1548     int xvmc_acceleration;
1549
1550     /**
1551      * macroblock decision mode
1552      * - encoding: set by user.
1553      * - decoding: unused
1554      */
1555     int mb_decision;
1556 #define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1557 #define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1558 #define FF_MB_DECISION_RD     2        ///< rate distoration
1559
1560     /**
1561      * custom intra quantization matrix
1562      * - encoding: set by user, can be NULL
1563      * - decoding: set by lavc
1564      */
1565     uint16_t *intra_matrix;
1566
1567     /**
1568      * custom inter quantization matrix
1569      * - encoding: set by user, can be NULL
1570      * - decoding: set by lavc
1571      */
1572     uint16_t *inter_matrix;
1573
1574     /**
1575      * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1576      * this is used to workaround some encoder bugs
1577      * - encoding: unused
1578      * - decoding: set by user, will be converted to upper case by lavc during init
1579      */
1580     unsigned int stream_codec_tag;
1581
1582     /**
1583      * scene change detection threshold.
1584      * 0 is default, larger means fewer detected scene changes
1585      * - encoding: set by user.
1586      * - decoding: unused
1587      */
1588     int scenechange_threshold;
1589
1590     /**
1591      * minimum lagrange multipler
1592      * - encoding: set by user.
1593      * - decoding: unused
1594      */
1595     int lmin;
1596
1597     /**
1598      * maximum lagrange multipler
1599      * - encoding: set by user.
1600      * - decoding: unused
1601      */
1602     int lmax;
1603
1604     /**
1605      * Palette control structure
1606      * - encoding: ??? (no palette-enabled encoder yet)
1607      * - decoding: set by user.
1608      */
1609     struct AVPaletteControl *palctrl;
1610
1611     /**
1612      * noise reduction strength
1613      * - encoding: set by user.
1614      * - decoding: unused
1615      */
1616     int noise_reduction;
1617
1618     /**
1619      * called at the beginning of a frame to get cr buffer for it.
1620      * buffer type (size, hints) must be the same. lavc won't check it.
1621      * lavc will pass previous buffer in pic, function should return
1622      * same buffer or new buffer with old frame "painted" into it.
1623      * if pic.data[0] == NULL must behave like get_buffer().
1624      * - encoding: unused
1625      * - decoding: set by lavc, user can override
1626      */
1627     int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1628
1629     /**
1630      * number of bits which should be loaded into the rc buffer before decoding starts
1631      * - encoding: set by user.
1632      * - decoding: unused
1633      */
1634     int rc_initial_buffer_occupancy;
1635
1636     /**
1637      *
1638      * - encoding: set by user.
1639      * - decoding: unused
1640      */
1641     int inter_threshold;
1642
1643     /**
1644      * CODEC_FLAG2_*.
1645      * - encoding: set by user.
1646      * - decoding: set by user.
1647      */
1648     int flags2;
1649
1650     /**
1651      * simulates errors in the bitstream to test error concealment.
1652      * - encoding: set by user.
1653      * - decoding: unused.
1654      */
1655     int error_rate;
1656
1657     /**
1658      * MP3 antialias algorithm, see FF_AA_* below.
1659      * - encoding: unused
1660      * - decoding: set by user
1661      */
1662     int antialias_algo;
1663 #define FF_AA_AUTO    0
1664 #define FF_AA_FASTINT 1 //not implemented yet
1665 #define FF_AA_INT     2
1666 #define FF_AA_FLOAT   3
1667     /**
1668      * Quantizer noise shaping.
1669      * - encoding: set by user
1670      * - decoding: unused
1671      */
1672     int quantizer_noise_shaping;
1673
1674     /**
1675      * Thread count.
1676      * is used to decide how many independant tasks should be passed to execute()
1677      * - encoding: set by user
1678      * - decoding: set by user
1679      */
1680     int thread_count;
1681
1682     /**
1683      * the codec may call this to execute several independant things. it will return only after
1684      * finishing all tasks, the user may replace this with some multithreaded implementation, the
1685      * default implementation will execute the parts serially
1686      * @param count the number of things to execute
1687      * - encoding: set by lavc, user can override
1688      * - decoding: set by lavc, user can override
1689      */
1690     int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1691
1692     /**
1693      * Thread opaque.
1694      * can be used by execute() to store some per AVCodecContext stuff.
1695      * - encoding: set by execute()
1696      * - decoding: set by execute()
1697      */
1698     void *thread_opaque;
1699
1700     /**
1701      * Motion estimation threshold. under which no motion estimation is
1702      * performed, but instead the user specified motion vectors are used
1703      *
1704      * - encoding: set by user
1705      * - decoding: unused
1706      */
1707      int me_threshold;
1708
1709     /**
1710      * Macroblock threshold. under which the user specified macroblock types will be used
1711      * - encoding: set by user
1712      * - decoding: unused
1713      */
1714      int mb_threshold;
1715
1716     /**
1717      * precision of the intra dc coefficient - 8.
1718      * - encoding: set by user
1719      * - decoding: unused
1720      */
1721      int intra_dc_precision;
1722
1723     /**
1724      * noise vs. sse weight for the nsse comparsion function.
1725      * - encoding: set by user
1726      * - decoding: unused
1727      */
1728      int nsse_weight;
1729
1730     /**
1731      * number of macroblock rows at the top which are skipped.
1732      * - encoding: unused
1733      * - decoding: set by user
1734      */
1735      int skip_top;
1736
1737     /**
1738      * number of macroblock rows at the bottom which are skipped.
1739      * - encoding: unused
1740      * - decoding: set by user
1741      */
1742      int skip_bottom;
1743
1744     /**
1745      * profile
1746      * - encoding: set by user
1747      * - decoding: set by lavc
1748      */
1749      int profile;
1750 #define FF_PROFILE_UNKNOWN -99
1751
1752     /**
1753      * level
1754      * - encoding: set by user
1755      * - decoding: set by lavc
1756      */
1757      int level;
1758 #define FF_LEVEL_UNKNOWN -99
1759
1760     /**
1761      * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1762      * - encoding: unused
1763      * - decoding: set by user
1764      */
1765      int lowres;
1766
1767     /**
1768      * bitsream width / height. may be different from width/height if lowres
1769      * or other things are used
1770      * - encoding: unused
1771      * - decoding: set by user before init if known, codec should override / dynamically change if needed
1772      */
1773     int coded_width, coded_height;
1774
1775     /**
1776      * frame skip threshold
1777      * - encoding: set by user
1778      * - decoding: unused
1779      */
1780     int frame_skip_threshold;
1781
1782     /**
1783      * frame skip factor
1784      * - encoding: set by user
1785      * - decoding: unused
1786      */
1787     int frame_skip_factor;
1788
1789     /**
1790      * frame skip exponent
1791      * - encoding: set by user
1792      * - decoding: unused
1793      */
1794     int frame_skip_exp;
1795
1796     /**
1797      * frame skip comparission function
1798      * - encoding: set by user.
1799      * - decoding: unused
1800      */
1801     int frame_skip_cmp;
1802
1803     /**
1804      * border processing masking. raises the quantizer for mbs on the borders
1805      * of the picture.
1806      * - encoding: set by user
1807      * - decoding: unused
1808      */
1809     float border_masking;
1810
1811     /**
1812      * minimum MB lagrange multipler.
1813      * - encoding: set by user.
1814      * - decoding: unused
1815      */
1816     int mb_lmin;
1817
1818     /**
1819      * maximum MB lagrange multipler.
1820      * - encoding: set by user.
1821      * - decoding: unused
1822      */
1823     int mb_lmax;
1824
1825     /**
1826      *
1827      * - encoding: set by user.
1828      * - decoding: unused
1829      */
1830     int me_penalty_compensation;
1831
1832     /**
1833      *
1834      * - encoding: unused
1835      * - decoding: set by user.
1836      */
1837     enum AVDiscard skip_loop_filter;
1838
1839     /**
1840      *
1841      * - encoding: unused
1842      * - decoding: set by user.
1843      */
1844     enum AVDiscard skip_idct;
1845
1846     /**
1847      *
1848      * - encoding: unused
1849      * - decoding: set by user.
1850      */
1851     enum AVDiscard skip_frame;
1852 } AVCodecContext;
1853
1854 /**
1855  * AVCodec.
1856  */
1857 typedef struct AVCodec {
1858     const char *name;
1859     enum CodecType type;
1860     enum CodecID id;
1861     int priv_data_size;
1862     int (*init)(AVCodecContext *);
1863     int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1864     int (*close)(AVCodecContext *);
1865     int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1866                   uint8_t *buf, int buf_size);
1867     int capabilities;
1868 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
1869     void *dummy; // FIXME remove next time we break binary compatibility
1870 #endif
1871     struct AVCodec *next;
1872     void (*flush)(AVCodecContext *);
1873     const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1874     const enum PixelFormat *pix_fmts;       ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1875 } AVCodec;
1876
1877 /**
1878  * four components are given, that's all.
1879  * the last component is alpha
1880  */
1881 typedef struct AVPicture {
1882     uint8_t *data[4];
1883     int linesize[4];       ///< number of bytes per line
1884 } AVPicture;
1885
1886 /**
1887  * AVPaletteControl
1888  * This structure defines a method for communicating palette changes
1889  * between and demuxer and a decoder.
1890  */
1891 #define AVPALETTE_SIZE 1024
1892 #define AVPALETTE_COUNT 256
1893 typedef struct AVPaletteControl {
1894
1895     /* demuxer sets this to 1 to indicate the palette has changed;
1896      * decoder resets to 0 */
1897     int palette_changed;
1898
1899     /* 4-byte ARGB palette entries, stored in native byte order; note that
1900      * the individual palette components should be on a 8-bit scale; if
1901      * the palette data comes from a IBM VGA native format, the component
1902      * data is probably 6 bits in size and needs to be scaled */
1903     unsigned int palette[AVPALETTE_COUNT];
1904
1905 } AVPaletteControl;
1906
1907 typedef struct AVSubtitleRect {
1908     uint16_t x;
1909     uint16_t y;
1910     uint16_t w;
1911     uint16_t h;
1912     uint16_t nb_colors;
1913     int linesize;
1914     uint32_t *rgba_palette;
1915     uint8_t *bitmap;
1916 } AVSubtitleRect;
1917
1918 typedef struct AVSubtitle {
1919     uint16_t format; /* 0 = graphics */
1920     uint32_t start_display_time; /* relative to packet pts, in ms */
1921     uint32_t end_display_time; /* relative to packet pts, in ms */
1922     uint32_t num_rects;
1923     AVSubtitleRect *rects;
1924 } AVSubtitle;
1925
1926 extern AVCodec ac3_encoder;
1927 extern AVCodec mp2_encoder;
1928 extern AVCodec mp3lame_encoder;
1929 extern AVCodec oggvorbis_encoder;
1930 extern AVCodec oggtheora_encoder;
1931 extern AVCodec faac_encoder;
1932 extern AVCodec xvid_encoder;
1933 extern AVCodec mpeg1video_encoder;
1934 extern AVCodec mpeg2video_encoder;
1935 extern AVCodec h261_encoder;
1936 extern AVCodec h263_encoder;
1937 extern AVCodec h263p_encoder;
1938 extern AVCodec flv_encoder;
1939 extern AVCodec rv10_encoder;
1940 extern AVCodec rv20_encoder;
1941 extern AVCodec dvvideo_encoder;
1942 extern AVCodec mjpeg_encoder;
1943 extern AVCodec ljpeg_encoder;
1944 extern AVCodec png_encoder;
1945 extern AVCodec ppm_encoder;
1946 extern AVCodec pgm_encoder;
1947 extern AVCodec pgmyuv_encoder;
1948 extern AVCodec pbm_encoder;
1949 extern AVCodec pam_encoder;
1950 extern AVCodec mpeg4_encoder;
1951 extern AVCodec msmpeg4v1_encoder;
1952 extern AVCodec msmpeg4v2_encoder;
1953 extern AVCodec msmpeg4v3_encoder;
1954 extern AVCodec wmv1_encoder;
1955 extern AVCodec wmv2_encoder;
1956 extern AVCodec huffyuv_encoder;
1957 extern AVCodec ffvhuff_encoder;
1958 extern AVCodec h264_encoder;
1959 extern AVCodec asv1_encoder;
1960 extern AVCodec asv2_encoder;
1961 extern AVCodec vcr1_encoder;
1962 extern AVCodec ffv1_encoder;
1963 extern AVCodec snow_encoder;
1964 extern AVCodec mdec_encoder;
1965 extern AVCodec zlib_encoder;
1966 extern AVCodec sonic_encoder;
1967 extern AVCodec sonic_ls_encoder;
1968 extern AVCodec svq1_encoder;
1969 extern AVCodec x264_encoder;
1970
1971 extern AVCodec h263_decoder;
1972 extern AVCodec h261_decoder;
1973 extern AVCodec mpeg4_decoder;
1974 extern AVCodec msmpeg4v1_decoder;
1975 extern AVCodec msmpeg4v2_decoder;
1976 extern AVCodec msmpeg4v3_decoder;
1977 extern AVCodec wmv1_decoder;
1978 extern AVCodec wmv2_decoder;
1979 extern AVCodec vc9_decoder;
1980 extern AVCodec wmv3_decoder;
1981 extern AVCodec mpeg1video_decoder;
1982 extern AVCodec mpeg2video_decoder;
1983 extern AVCodec mpegvideo_decoder;
1984 extern AVCodec mpeg_xvmc_decoder;
1985 extern AVCodec h263i_decoder;
1986 extern AVCodec flv_decoder;
1987 extern AVCodec rv10_decoder;
1988 extern AVCodec rv20_decoder;
1989 extern AVCodec rv30_decoder;
1990 extern AVCodec rv40_decoder;
1991 extern AVCodec svq1_decoder;
1992 extern AVCodec svq3_decoder;
1993 extern AVCodec dvvideo_decoder;
1994 extern AVCodec wmav1_decoder;
1995 extern AVCodec wmav2_decoder;
1996 extern AVCodec mjpeg_decoder;
1997 extern AVCodec mjpegb_decoder;
1998 extern AVCodec sp5x_decoder;
1999 extern AVCodec png_decoder;
2000 extern AVCodec mp2_decoder;
2001 extern AVCodec mp3_decoder;
2002 extern AVCodec mp3adu_decoder;
2003 extern AVCodec mp3on4_decoder;
2004 extern AVCodec qdm2_decoder;
2005 extern AVCodec mace3_decoder;
2006 extern AVCodec mace6_decoder;
2007 extern AVCodec huffyuv_decoder;
2008 extern AVCodec ffvhuff_decoder;
2009 extern AVCodec oggvorbis_decoder;
2010 extern AVCodec oggtheora_decoder;
2011 extern AVCodec cyuv_decoder;
2012 extern AVCodec h264_decoder;
2013 extern AVCodec indeo3_decoder;
2014 extern AVCodec vp3_decoder;
2015 extern AVCodec theora_decoder;
2016 extern AVCodec amr_nb_decoder;
2017 extern AVCodec amr_nb_encoder;
2018 extern AVCodec amr_wb_encoder;
2019 extern AVCodec amr_wb_decoder;
2020 extern AVCodec aac_decoder;
2021 extern AVCodec mpeg4aac_decoder;
2022 extern AVCodec asv1_decoder;
2023 extern AVCodec asv2_decoder;
2024 extern AVCodec vcr1_decoder;
2025 extern AVCodec cljr_decoder;
2026 extern AVCodec ffv1_decoder;
2027 extern AVCodec snow_decoder;
2028 extern AVCodec fourxm_decoder;
2029 extern AVCodec mdec_decoder;
2030 extern AVCodec roq_decoder;
2031 extern AVCodec interplay_video_decoder;
2032 extern AVCodec xan_wc3_decoder;
2033 extern AVCodec rpza_decoder;
2034 extern AVCodec cinepak_decoder;
2035 extern AVCodec msrle_decoder;
2036 extern AVCodec msvideo1_decoder;
2037 extern AVCodec vqa_decoder;
2038 extern AVCodec idcin_decoder;
2039 extern AVCodec eightbps_decoder;
2040 extern AVCodec smc_decoder;
2041 extern AVCodec flic_decoder;
2042 extern AVCodec vmdvideo_decoder;
2043 extern AVCodec vmdaudio_decoder;
2044 extern AVCodec truemotion1_decoder;
2045 extern AVCodec truemotion2_decoder;
2046 extern AVCodec mszh_decoder;
2047 extern AVCodec zlib_decoder;
2048 extern AVCodec ra_144_decoder;
2049 extern AVCodec ra_288_decoder;
2050 extern AVCodec roq_dpcm_decoder;
2051 extern AVCodec interplay_dpcm_decoder;
2052 extern AVCodec xan_dpcm_decoder;
2053 extern AVCodec sol_dpcm_decoder;
2054 extern AVCodec sonic_decoder;
2055 extern AVCodec qtrle_decoder;
2056 extern AVCodec flac_decoder;
2057 extern AVCodec tscc_decoder;
2058 extern AVCodec ulti_decoder;
2059 extern AVCodec qdraw_decoder;
2060 extern AVCodec xl_decoder;
2061 extern AVCodec qpeg_decoder;
2062 extern AVCodec shorten_decoder;
2063 extern AVCodec loco_decoder;
2064 extern AVCodec wnv1_decoder;
2065 extern AVCodec aasc_decoder;
2066 extern AVCodec alac_decoder;
2067 extern AVCodec ws_snd1_decoder;
2068 extern AVCodec indeo2_decoder;
2069 extern AVCodec vorbis_decoder;
2070 extern AVCodec fraps_decoder;
2071 extern AVCodec libgsm_encoder;
2072 extern AVCodec libgsm_decoder;
2073
2074 /* pcm codecs */
2075 #define PCM_CODEC(id, name) \
2076 extern AVCodec name ## _decoder; \
2077 extern AVCodec name ## _encoder
2078
2079 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2080 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2081 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2082 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2083 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2084 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2085 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2086 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2087 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2088 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2089 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2090 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2091 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2092 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2093 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2094 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2095 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2096
2097 /* adpcm codecs */
2098
2099 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2100 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2101 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2102 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2103 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2104 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2105 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2106 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2107 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2108 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2109 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2110 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2111 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2112 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2113 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2114
2115 #undef PCM_CODEC
2116
2117 /* dummy raw video codec */
2118 extern AVCodec rawvideo_encoder;
2119 extern AVCodec rawvideo_decoder;
2120
2121 /* the following codecs use external GPL libs */
2122 extern AVCodec ac3_decoder;
2123 extern AVCodec dts_decoder;
2124
2125 /* subtitles */
2126 extern AVCodec dvdsub_decoder;
2127 extern AVCodec dvbsub_encoder;
2128 extern AVCodec dvbsub_decoder;
2129
2130 /* resample.c */
2131
2132 struct ReSampleContext;
2133 struct AVResampleContext;
2134
2135 typedef struct ReSampleContext ReSampleContext;
2136
2137 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2138                                      int output_rate, int input_rate);
2139 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2140 void audio_resample_close(ReSampleContext *s);
2141
2142 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2143 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2144 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2145 void av_resample_close(struct AVResampleContext *c);
2146
2147 /* YUV420 format is assumed ! */
2148
2149 struct ImgReSampleContext;
2150
2151 typedef struct ImgReSampleContext ImgReSampleContext;
2152
2153 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2154                                       int input_width, int input_height);
2155
2156 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2157                                       int iwidth, int iheight,
2158                                       int topBand, int bottomBand,
2159                                       int leftBand, int rightBand,
2160                                       int padtop, int padbottom,
2161                                       int padleft, int padright);
2162
2163
2164 void img_resample(ImgReSampleContext *s,
2165                   AVPicture *output, const AVPicture *input);
2166
2167 void img_resample_close(ImgReSampleContext *s);
2168
2169 /**
2170  * Allocate memory for a picture.  Call avpicture_free to free it.
2171  *
2172  * @param picture the picture to be filled in.
2173  * @param pix_fmt the format of the picture.
2174  * @param width the width of the picture.
2175  * @param height the height of the picture.
2176  * @return 0 if successful, -1 if not.
2177  */
2178 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2179
2180 /* Free a picture previously allocated by avpicture_alloc. */
2181 void avpicture_free(AVPicture *picture);
2182
2183 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2184                    int pix_fmt, int width, int height);
2185 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2186                      unsigned char *dest, int dest_size);
2187 int avpicture_get_size(int pix_fmt, int width, int height);
2188 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2189 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2190 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2191 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2192 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2193
2194 #define FF_LOSS_RESOLUTION  0x0001 /* loss due to resolution change */
2195 #define FF_LOSS_DEPTH       0x0002 /* loss due to color depth change */
2196 #define FF_LOSS_COLORSPACE  0x0004 /* loss due to color space conversion */
2197 #define FF_LOSS_ALPHA       0x0008 /* loss of alpha bits */
2198 #define FF_LOSS_COLORQUANT  0x0010 /* loss due to color quantization */
2199 #define FF_LOSS_CHROMA      0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2200
2201 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2202                              int has_alpha);
2203 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2204                               int has_alpha, int *loss_ptr);
2205
2206 #define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
2207 #define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
2208 int img_get_alpha_info(const AVPicture *src,
2209                        int pix_fmt, int width, int height);
2210
2211 /* convert among pixel formats */
2212 int img_convert(AVPicture *dst, int dst_pix_fmt,
2213                 const AVPicture *src, int pix_fmt,
2214                 int width, int height);
2215
2216 /* deinterlace a picture */
2217 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2218                           int pix_fmt, int width, int height);
2219
2220 /* external high level API */
2221
2222 extern AVCodec *first_avcodec;
2223
2224 /* returns LIBAVCODEC_VERSION_INT constant */
2225 unsigned avcodec_version(void);
2226 /* returns LIBAVCODEC_BUILD constant */
2227 unsigned avcodec_build(void);
2228 void avcodec_init(void);
2229
2230 void register_avcodec(AVCodec *format);
2231 AVCodec *avcodec_find_encoder(enum CodecID id);
2232 AVCodec *avcodec_find_encoder_by_name(const char *name);
2233 AVCodec *avcodec_find_decoder(enum CodecID id);
2234 AVCodec *avcodec_find_decoder_by_name(const char *name);
2235 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2236
2237 void avcodec_get_context_defaults(AVCodecContext *s);
2238 AVCodecContext *avcodec_alloc_context(void);
2239 void avcodec_get_frame_defaults(AVFrame *pic);
2240 AVFrame *avcodec_alloc_frame(void);
2241
2242 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2243 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2244 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2245 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2246 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2247 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2248
2249 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2250 void avcodec_thread_free(AVCodecContext *s);
2251 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2252 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2253 //FIXME func typedef
2254
2255 /**
2256  * opens / inits the AVCodecContext.
2257  * not thread save!
2258  */
2259 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2260
2261 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2262                          int *frame_size_ptr,
2263                          uint8_t *buf, int buf_size);
2264 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2265                          int *got_picture_ptr,
2266                          uint8_t *buf, int buf_size);
2267 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2268                             int *got_sub_ptr,
2269                             const uint8_t *buf, int buf_size);
2270 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2271                         int *data_size_ptr,
2272                         uint8_t *buf, int buf_size);
2273 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2274                          const short *samples);
2275 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2276                          const AVFrame *pict);
2277 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2278                             const AVSubtitle *sub);
2279
2280 int avcodec_close(AVCodecContext *avctx);
2281
2282 void avcodec_register_all(void);
2283
2284 void avcodec_flush_buffers(AVCodecContext *avctx);
2285
2286 void avcodec_default_free_buffers(AVCodecContext *s);
2287
2288 /* misc usefull functions */
2289
2290 /**
2291  * returns a single letter to describe the picture type
2292  */
2293 char av_get_pict_type_char(int pict_type);
2294
2295
2296 /* frame parsing */
2297 typedef struct AVCodecParserContext {
2298     void *priv_data;
2299     struct AVCodecParser *parser;
2300     int64_t frame_offset; /* offset of the current frame */
2301     int64_t cur_offset; /* current offset
2302                            (incremented by each av_parser_parse()) */
2303     int64_t last_frame_offset; /* offset of the last frame */
2304     /* video info */
2305     int pict_type; /* XXX: put it back in AVCodecContext */
2306     int repeat_pict; /* XXX: put it back in AVCodecContext */
2307     int64_t pts;     /* pts of the current frame */
2308     int64_t dts;     /* dts of the current frame */
2309
2310     /* private data */
2311     int64_t last_pts;
2312     int64_t last_dts;
2313     int fetch_timestamp;
2314
2315 #define AV_PARSER_PTS_NB 4
2316     int cur_frame_start_index;
2317     int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2318     int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2319     int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2320
2321     int flags;
2322 #define PARSER_FLAG_COMPLETE_FRAMES           0x0001
2323 } AVCodecParserContext;
2324
2325 typedef struct AVCodecParser {
2326     int codec_ids[5]; /* several codec IDs are permitted */
2327     int priv_data_size;
2328     int (*parser_init)(AVCodecParserContext *s);
2329     int (*parser_parse)(AVCodecParserContext *s,
2330                         AVCodecContext *avctx,
2331                         uint8_t **poutbuf, int *poutbuf_size,
2332                         const uint8_t *buf, int buf_size);
2333     void (*parser_close)(AVCodecParserContext *s);
2334     int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2335     struct AVCodecParser *next;
2336 } AVCodecParser;
2337
2338 extern AVCodecParser *av_first_parser;
2339
2340 void av_register_codec_parser(AVCodecParser *parser);
2341 AVCodecParserContext *av_parser_init(int codec_id);
2342 int av_parser_parse(AVCodecParserContext *s,
2343                     AVCodecContext *avctx,
2344                     uint8_t **poutbuf, int *poutbuf_size,
2345                     const uint8_t *buf, int buf_size,
2346                     int64_t pts, int64_t dts);
2347 int av_parser_change(AVCodecParserContext *s,
2348                      AVCodecContext *avctx,
2349                      uint8_t **poutbuf, int *poutbuf_size,
2350                      const uint8_t *buf, int buf_size, int keyframe);
2351 void av_parser_close(AVCodecParserContext *s);
2352
2353 extern AVCodecParser mpegvideo_parser;
2354 extern AVCodecParser mpeg4video_parser;
2355 extern AVCodecParser h261_parser;
2356 extern AVCodecParser h263_parser;
2357 extern AVCodecParser h264_parser;
2358 extern AVCodecParser mjpeg_parser;
2359 extern AVCodecParser pnm_parser;
2360 extern AVCodecParser mpegaudio_parser;
2361 extern AVCodecParser ac3_parser;
2362 extern AVCodecParser dvdsub_parser;
2363 extern AVCodecParser dvbsub_parser;
2364
2365 /* memory */
2366 void *av_malloc(unsigned int size);
2367 void *av_mallocz(unsigned int size);
2368 void *av_realloc(void *ptr, unsigned int size);
2369 void av_free(void *ptr);
2370 char *av_strdup(const char *s);
2371 void av_freep(void *ptr);
2372 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2373 /* for static data only */
2374 /* call av_free_static to release all staticaly allocated tables */
2375 void av_free_static(void);
2376 void *av_mallocz_static(unsigned int size);
2377 void *av_realloc_static(void *ptr, unsigned int size);
2378
2379 /* add by bero : in adx.c */
2380 int is_adx(const unsigned char *buf,size_t bufsize);
2381
2382 void img_copy(AVPicture *dst, const AVPicture *src,
2383               int pix_fmt, int width, int height);
2384
2385 /* av_log API */
2386
2387 #include <stdarg.h>
2388
2389 #define AV_LOG_QUIET -1
2390 #define AV_LOG_ERROR 0
2391 #define AV_LOG_INFO 1
2392 #define AV_LOG_DEBUG 2
2393
2394 #ifdef __GNUC__
2395 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2396 #else
2397 extern void av_log(void*, int level, const char *fmt, ...);
2398 #endif
2399
2400 extern void av_vlog(void*, int level, const char *fmt, va_list);
2401 extern int av_log_get_level(void);
2402 extern void av_log_set_level(int);
2403 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2404
2405 /* endian macros */
2406 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2407 #define BE_16(x)  ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2408 #define BE_32(x)  ((((uint8_t*)(x))[0] << 24) | \
2409                    (((uint8_t*)(x))[1] << 16) | \
2410                    (((uint8_t*)(x))[2] << 8) | \
2411                     ((uint8_t*)(x))[3])
2412 #define LE_16(x)  ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2413 #define LE_32(x)  ((((uint8_t*)(x))[3] << 24) | \
2414                    (((uint8_t*)(x))[2] << 16) | \
2415                    (((uint8_t*)(x))[1] << 8) | \
2416                     ((uint8_t*)(x))[0])
2417 #endif
2418
2419 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2420
2421 #ifdef __cplusplus
2422 }
2423 #endif
2424
2425 #endif /* AVCODEC_H */