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 "common.h"
  15
  16 #define FFMPEG_VERSION_INT     0x000408
  17 #define FFMPEG_VERSION         "0.4.8"
  18 #define LIBAVCODEC_BUILD       4681
  19
  20 #define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
  21 #define LIBAVCODEC_VERSION     FFMPEG_VERSION
  22
  23 #define AV_STRINGIFY(s) AV_TOSTRING(s)
  24 #define AV_TOSTRING(s) #s
  25 #define LIBAVCODEC_IDENT        "FFmpeg" LIBAVCODEC_VERSION "b" AV_STRINGIFY(LIBAVCODEC_BUILD)
  26
  27 enum CodecID {
  28     CODEC_ID_NONE,
  29     CODEC_ID_MPEG1VIDEO,
  30     CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
  31     CODEC_ID_MPEG2VIDEO_XVMC,
  32     CODEC_ID_H263,
  33     CODEC_ID_RV10,
  34     CODEC_ID_MP2,
  35     CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
  36     CODEC_ID_VORBIS,
  37     CODEC_ID_AC3,
  38     CODEC_ID_MJPEG,
  39     CODEC_ID_MJPEGB,
  40     CODEC_ID_LJPEG,
  41     CODEC_ID_MPEG4,
  42     CODEC_ID_RAWVIDEO,
  43     CODEC_ID_MSMPEG4V1,
  44     CODEC_ID_MSMPEG4V2,
  45     CODEC_ID_MSMPEG4V3,
  46     CODEC_ID_WMV1,
  47     CODEC_ID_WMV2,
  48     CODEC_ID_H263P,
  49     CODEC_ID_H263I,
  50     CODEC_ID_FLV1,
  51     CODEC_ID_SVQ1,
  52     CODEC_ID_SVQ3,
  53     CODEC_ID_DVVIDEO,
  54     CODEC_ID_DVAUDIO,
  55     CODEC_ID_WMAV1,
  56     CODEC_ID_WMAV2,
  57     CODEC_ID_MACE3,
  58     CODEC_ID_MACE6,
  59     CODEC_ID_HUFFYUV,
  60     CODEC_ID_CYUV,
  61     CODEC_ID_H264,
  62     CODEC_ID_INDEO3,
  63     CODEC_ID_VP3,
  64     CODEC_ID_AAC,
  65     CODEC_ID_MPEG4AAC,
  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
  78     /* various pcm "codecs" */
  79     CODEC_ID_PCM_S16LE,
  80     CODEC_ID_PCM_S16BE,
  81     CODEC_ID_PCM_U16LE,
  82     CODEC_ID_PCM_U16BE,
  83     CODEC_ID_PCM_S8,
  84     CODEC_ID_PCM_U8,
  85     CODEC_ID_PCM_MULAW,
  86     CODEC_ID_PCM_ALAW,
  87
  88     /* various adpcm codecs */
  89     CODEC_ID_ADPCM_IMA_QT,
  90     CODEC_ID_ADPCM_IMA_WAV,
  91     CODEC_ID_ADPCM_IMA_DK3,
  92     CODEC_ID_ADPCM_IMA_DK4,
  93     CODEC_ID_ADPCM_MS,
  94     CODEC_ID_ADPCM_4XM,
  95
  96         /* AMR */
  97     CODEC_ID_AMR_NB,
  98     CODEC_ID_AMR_WB,
  99
 100     /* RealAudio codecs*/
 101     CODEC_ID_RA_144,
 102     CODEC_ID_RA_288,
 103
 104     /* various DPCM codecs */
 105     CODEC_ID_ROQ_DPCM,
 106     CODEC_ID_INTERPLAY_DPCM,
 107     CODEC_ID_XAN_DPCM,
 108 };
 109
 110 /* CODEC_ID_MP3LAME is absolete */
 111 #define CODEC_ID_MP3LAME CODEC_ID_MP3
 112
 113 enum CodecType {
 114     CODEC_TYPE_UNKNOWN = -1,
 115     CODEC_TYPE_VIDEO,
 116     CODEC_TYPE_AUDIO,
 117 };
 118
 119 /**
 120  * Pixel format. Notes:
 121  *
 122  * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
 123  * color is put together as:
 124  *  (A << 24) | (R << 16) | (G << 8) | B
 125  * This is stored as BGRA on little endian CPU architectures and ARGB on
 126  * big endian CPUs.
 127  *
 128  * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
 129  * image data is stored in AVFrame.data[0]. The palette is transported in
 130  * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
 131  * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
 132  * also endian-specific).
 133  */
 134 enum PixelFormat {
 135     PIX_FMT_YUV420P,   ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
 136     PIX_FMT_YUV422,
 137     PIX_FMT_RGB24,     ///< Packed pixel, 3 bytes per pixel, RGBRGB...
 138     PIX_FMT_BGR24,     ///< Packed pixel, 3 bytes per pixel, BGRBGR...
 139     PIX_FMT_YUV422P,   ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
 140     PIX_FMT_YUV444P,   ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
 141     PIX_FMT_RGBA32,    ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
 142     PIX_FMT_YUV410P,   ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
 143     PIX_FMT_YUV411P,   ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
 144     PIX_FMT_RGB565,    ///< always stored in cpu endianness
 145     PIX_FMT_RGB555,    ///< always stored in cpu endianness, most significant bit to 1
 146     PIX_FMT_GRAY8,
 147     PIX_FMT_MONOWHITE, ///< 0 is white
 148     PIX_FMT_MONOBLACK, ///< 0 is black
 149     PIX_FMT_PAL8,      ///< 8 bit with RGBA palette
 150     PIX_FMT_YUVJ420P,  ///< Planar YUV 4:2:0 full scale (jpeg)
 151     PIX_FMT_YUVJ422P,  ///< Planar YUV 4:2:2 full scale (jpeg)
 152     PIX_FMT_YUVJ444P,  ///< Planar YUV 4:4:4 full scale (jpeg)
 153     PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
 154     PIX_FMT_XVMC_MPEG2_IDCT,
 155     PIX_FMT_NB,
 156 };
 157
 158 /* currently unused, may be used if 24/32 bits samples ever supported */
 159 enum SampleFormat {
 160     SAMPLE_FMT_S16 = 0,         ///< signed 16 bits
 161 };
 162
 163 /* in bytes */
 164 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
 165
 166 /**
 167  * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
 168  * this is mainly needed because some optimized bitstream readers read
 169  * 32 or 64 bit at once and could read over the end<br>
 170  * Note, if the first 23 bits of the additional bytes are not 0 then damaged
 171  * MPEG bitstreams could cause overread and segfault
 172  */
 173 #define FF_INPUT_BUFFER_PADDING_SIZE 8
 174
 175 /* motion estimation type, EPZS by default */
 176 enum Motion_Est_ID {
 177     ME_ZERO = 1,
 178     ME_FULL,
 179     ME_LOG,
 180     ME_PHODS,
 181     ME_EPZS,
 182     ME_X1
 183 };
 184
 185 typedef struct RcOverride{
 186     int start_frame;
 187     int end_frame;
 188     int qscale; // if this is 0 then quality_factor will be used instead
 189     float quality_factor;
 190 } RcOverride;
 191
 192 /* only for ME compatiblity with old apps */
 193 extern int motion_estimation_method;
 194
 195 /* ME algos sorted by quality */
 196 static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
 197                                        ME_X1, ME_EPZS, ME_FULL };
 198
 199
 200 #define FF_MAX_B_FRAMES 8
 201
 202 /* encoding support
 203    these flags can be passed in AVCodecContext.flags before initing
 204    Note: note not everything is supported yet
 205 */
 206
 207 #define CODEC_FLAG_QSCALE 0x0002  ///< use fixed qscale
 208 #define CODEC_FLAG_4MV    0x0004  ///< 4 MV per MB allowed
 209 #define CODEC_FLAG_QPEL   0x0010  ///< use qpel MC
 210 #define CODEC_FLAG_GMC    0x0020  ///< use GMC
 211 #define CODEC_FLAG_PART   0x0080  ///< use data partitioning
 212 /* parent program gurantees that the input for b-frame containing streams is not written to
 213    for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
 214 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
 215 #define CODEC_FLAG_PASS1 0x0200   ///< use internal 2pass ratecontrol in first  pass mode
 216 #define CODEC_FLAG_PASS2 0x0400   ///< use internal 2pass ratecontrol in second pass mode
 217 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
 218 #define CODEC_FLAG_GRAY  0x2000   ///< only decode/encode grayscale
 219 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
 220 #define CODEC_FLAG_PSNR           0x8000 ///< error[?] variables will be set during encoding
 221 #define CODEC_FLAG_TRUNCATED  0x00010000 /** input bitstream might be truncated at a random location instead
 222                                             of only at frame boundaries */
 223 #define CODEC_FLAG_NORMALIZE_AQP  0x00020000 ///< normalize adaptive quantization
 224 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
 225 #define CODEC_FLAG_LOW_DELAY      0x00080000 ///< force low delay
 226 #define CODEC_FLAG_ALT_SCAN       0x00100000 ///< use alternate scan
 227 #define CODEC_FLAG_TRELLIS_QUANT  0x00200000 ///< use trellis quantization
 228 #define CODEC_FLAG_GLOBAL_HEADER  0x00400000 ///< place global headers in extradata instead of every keyframe
 229 #define CODEC_FLAG_BITEXACT       0x00800000 ///< use only bitexact stuff (except (i)dct)
 230 /* Fx : Flag for h263+ extra options */
 231 #define CODEC_FLAG_H263P_AIC      0x01000000 ///< Advanced intra coding
 232 #define CODEC_FLAG_H263P_UMV      0x02000000 ///< Unlimited motion vector
 233 #define CODEC_FLAG_CBP_RD         0x04000000 ///< use rate distortion optimization for cbp
 234 /* For advanced prediction mode, we reuse the 4MV flag */
 235 /* Unsupported options :
 236  *              Syntax Arithmetic coding (SAC)
 237  *              Deblocking filter internal loop
 238  *              Slice structured
 239  *              Reference Picture Selection
 240  *              Independant Segment Decoding
 241  *              Alternative Inter *             VLC
 242  *              Modified Quantization */
 243 /* /Fx */
 244 /* codec capabilities */
 245
 246 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
 247 /**
 248  * Codec uses get_buffer() for allocating buffers.
 249  * direct rendering method 1
 250  */
 251 #define CODEC_CAP_DR1             0x0002
 252 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
 253    used */
 254 #define CODEC_CAP_PARSE_ONLY      0x0004
 255 #define CODEC_CAP_TRUNCATED       0x0008
 256
 257 #define FF_COMMON_FRAME \
 258     /**\
 259      * pointer to the picture planes.\
 260      * this might be different from the first allocated byte\
 261      * - encoding: \
 262      * - decoding: \
 263      */\
 264     uint8_t *data[4];\
 265     int linesize[4];\
 266     /**\
 267      * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
 268      * this isnt used by lavc unless the default get/release_buffer() is used\
 269      * - encoding: \
 270      * - decoding: \
 271      */\
 272     uint8_t *base[4];\
 273     /**\
 274      * 1 -> keyframe, 0-> not\
 275      * - encoding: set by lavc\
 276      * - decoding: set by lavc\
 277      */\
 278     int key_frame;\
 279 \
 280     /**\
 281      * picture type of the frame, see ?_TYPE below.\
 282      * - encoding: set by lavc for coded_picture (and set by user for input)\
 283      * - decoding: set by lavc\
 284      */\
 285     int pict_type;\
 286 \
 287     /**\
 288      * presentation timestamp in micro seconds (time when frame should be shown to user)\
 289      * if 0 then the frame_rate will be used as reference\
 290      * - encoding: MUST be set by user\
 291      * - decoding: set by lavc\
 292      */\
 293     int64_t pts;\
 294 \
 295     /**\
 296      * picture number in bitstream order.\
 297      * - encoding: set by\
 298      * - decoding: set by lavc\
 299      */\
 300     int coded_picture_number;\
 301     /**\
 302      * picture number in display order.\
 303      * - encoding: set by\
 304      * - decoding: set by lavc\
 305      */\
 306     int display_picture_number;\
 307 \
 308     /**\
 309      * quality (between 1 (good) and 31 (bad)) \
 310      * - encoding: set by lavc for coded_picture (and set by user for input)\
 311      * - decoding: set by lavc\
 312      */\
 313     float quality; \
 314 \
 315     /**\
 316      * buffer age (1->was last buffer and dint change, 2->..., ...).\
 317      * set to something large if the buffer has not been used yet \
 318      * - encoding: unused\
 319      * - decoding: MUST be set by get_buffer()\
 320      */\
 321     int age;\
 322 \
 323     /**\
 324      * is this picture used as reference\
 325      * - encoding: unused\
 326      * - decoding: set by lavc (before get_buffer() call))\
 327      */\
 328     int reference;\
 329 \
 330     /**\
 331      * QP table\
 332      * - encoding: unused\
 333      * - decoding: set by lavc\
 334      */\
 335     int8_t *qscale_table;\
 336     /**\
 337      * QP store stride\
 338      * - encoding: unused\
 339      * - decoding: set by lavc\
 340      */\
 341     int qstride;\
 342 \
 343     /**\
 344      * mbskip_table[mb]>=1 if MB didnt change\
 345      * stride= mb_width = (width+15)>>4\
 346      * - encoding: unused\
 347      * - decoding: set by lavc\
 348      */\
 349     uint8_t *mbskip_table;\
 350 \
 351     /**\
 352      * for some private data of the user\
 353      * - encoding: unused\
 354      * - decoding: set by user\
 355      */\
 356     void *opaque;\
 357 \
 358     /**\
 359      * error\
 360      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
 361      * - decoding: unused\
 362      */\
 363     uint64_t error[4];\
 364 \
 365     /**\
 366      * type of the buffer (to keep track of who has to dealloc data[*])\
 367      * - encoding: set by the one who allocs it\
 368      * - decoding: set by the one who allocs it\
 369      * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
 370      */\
 371     int type;\
 372     \
 373     /**\
 374      * when decoding, this signal how much the picture must be delayed.\
 375      * extra_delay = repeat_pict / (2*fps)\
 376      * - encoding: unused\
 377      * - decoding: set by lavc\
 378      */\
 379     int repeat_pict;\
 380     \
 381     /**\
 382      * \
 383      */\
 384     int qscale_type;\
 385
 386 #define FF_QSCALE_TYPE_MPEG1    0
 387 #define FF_QSCALE_TYPE_MPEG2    1
 388
 389 #define FF_BUFFER_TYPE_INTERNAL 1
 390 #define FF_BUFFER_TYPE_USER     2 ///< Direct rendering buffers (image is (de)allocated by user)
 391 #define FF_BUFFER_TYPE_SHARED   4 ///< buffer from somewher else, dont dealloc image (data/base)
 392 #define FF_BUFFER_TYPE_COPY     8 ///< just a (modified) copy of some other buffer, dont dealloc anything
 393
 394
 395 #define FF_I_TYPE 1 // Intra
 396 #define FF_P_TYPE 2 // Predicted
 397 #define FF_B_TYPE 3 // Bi-dir predicted
 398 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
 399 #define FF_SI_TYPE 5
 400 #define FF_SP_TYPE 6
 401
 402 /**
 403  * Audio Video Frame.
 404  */
 405 typedef struct AVFrame {
 406     FF_COMMON_FRAME
 407 } AVFrame;
 408
 409 #define DEFAULT_FRAME_RATE_BASE 1001000
 410
 411 /**
 412  * main external api structure.
 413  */
 414 typedef struct AVCodecContext {
 415     /**
 416      * the average bitrate.
 417      * - encoding: set by user. unused for constant quantizer encoding
 418      * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
 419      */
 420     int bit_rate;
 421
 422     /**
 423      * number of bits the bitstream is allowed to diverge from the reference.
 424      *           the reference can be CBR (for CBR pass1) or VBR (for pass2)
 425      * - encoding: set by user. unused for constant quantizer encoding
 426      * - decoding: unused
 427      */
 428     int bit_rate_tolerance;
 429
 430     /**
 431      * CODEC_FLAG_*.
 432      * - encoding: set by user.
 433      * - decoding: set by user.
 434      */
 435     int flags;
 436
 437     /**
 438      * some codecs needs additionnal format info. It is stored here
 439      * - encoding: set by user.
 440      * - decoding: set by lavc. (FIXME is this ok?)
 441      */
 442     int sub_id;
 443
 444     /**
 445      * motion estimation algorithm used for video coding.
 446      * - encoding: MUST be set by user.
 447      * - decoding: unused
 448      */
 449     int me_method;
 450
 451     /**
 452      * some codecs need / can use extra-data like huffman tables.
 453      * mjpeg: huffman tables
 454      * rv10: additional flags
 455      * mpeg4: global headers (they can be in the bitstream or here)
 456      * - encoding: set/allocated/freed by lavc.
 457      * - decoding: set/allocated/freed by user.
 458      */
 459     void *extradata;
 460     int extradata_size;
 461
 462     /* video only */
 463     /**
 464      * frames per sec multiplied by frame_rate_base.
 465      * for variable fps this is the precission, so if the timestamps
 466      * can be specified in msec precssion then this is 1000*frame_rate_base
 467      * - encoding: MUST be set by user
 468      * - decoding: set by lavc. 0 or the frame_rate if available
 469      */
 470     int frame_rate;
 471
 472     /**
 473      * width / height.
 474      * - encoding: MUST be set by user.
 475      * - decoding: set by user, some codecs might override / change it during playback
 476      */
 477     int width, height;
 478
 479 #define FF_ASPECT_SQUARE 1
 480 #define FF_ASPECT_4_3_625 2
 481 #define FF_ASPECT_4_3_525 3
 482 #define FF_ASPECT_16_9_625 4
 483 #define FF_ASPECT_16_9_525 5
 484 #define FF_ASPECT_EXTENDED 15
 485
 486     /**
 487      * the number of pictures in a group of pitures, or 0 for intra_only.
 488      * - encoding: set by user.
 489      * - decoding: unused
 490      */
 491     int gop_size;
 492
 493     /**
 494      * pixel format, see PIX_FMT_xxx.
 495      * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
 496      *                    conversion is in order. This only works for
 497      *                    codecs with one supported pix_fmt, we should
 498      *                    do something for a generic case as well.
 499      * - decoding: set by lavc.
 500      */
 501     enum PixelFormat pix_fmt;
 502
 503     /**
 504      * Frame rate emulation. If not zero lower layer (i.e. format handler)
 505      * has to read frames at native frame rate.
 506      * - encoding: set by user.
 507      * - decoding: unused.
 508      */
 509     int rate_emu;
 510
 511     /**
 512      * if non NULL, 'draw_horiz_band' is called by the libavcodec
 513      * decoder to draw an horizontal band. It improve cache usage. Not
 514      * all codecs can do that. You must check the codec capabilities
 515      * before
 516      * - encoding: unused
 517      * - decoding: set by user.
 518      * @param height the height of the slice
 519      * @param y the y position of the slice
 520      * @param type 1->top field, 2->bottom field, 3->frame
 521      * @param offset offset into the AVFrame.data from which the slice should be read
 522      */
 523     void (*draw_horiz_band)(struct AVCodecContext *s,
 524                             const AVFrame *src, int offset[4],
 525                             int y, int type, int height);
 526
 527     /* audio only */
 528     int sample_rate; ///< samples per sec
 529     int channels;
 530     int sample_fmt;  ///< sample format, currenly unused
 531
 532     /* the following data should not be initialized */
 533     int frame_size;     ///< in samples, initialized when calling 'init'
 534     int frame_number;   ///< audio or video frame number
 535     int real_pict_num;  ///< returns the real picture number of previous encoded frame
 536
 537     /**
 538      * number of frames the decoded output will be delayed relative to
 539      * the encoded input.
 540      * - encoding: set by lavc.
 541      * - decoding: unused
 542      */
 543     int delay;
 544
 545     /* - encoding parameters */
 546     float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
 547     float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
 548
 549     /**
 550      * minimum quantizer.
 551      * - encoding: set by user.
 552      * - decoding: unused
 553      */
 554     int qmin;
 555
 556     /**
 557      * maximum quantizer.
 558      * - encoding: set by user.
 559      * - decoding: unused
 560      */
 561     int qmax;
 562
 563     /**
 564      * maximum quantizer difference etween frames.
 565      * - encoding: set by user.
 566      * - decoding: unused
 567      */
 568     int max_qdiff;
 569
 570     /**
 571      * maximum number of b frames between non b frames.
 572      * note: the output will be delayed by max_b_frames+1 relative to the input
 573      * - encoding: set by user.
 574      * - decoding: unused
 575      */
 576     int max_b_frames;
 577
 578     /**
 579      * qscale factor between ip and b frames.
 580      * - encoding: set by user.
 581      * - decoding: unused
 582      */
 583     float b_quant_factor;
 584
 585     /** obsolete FIXME remove */
 586     int rc_strategy;
 587     int b_frame_strategy;
 588
 589     /**
 590      * hurry up amount.
 591      * - encoding: unused
 592      * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
 593      */
 594     int hurry_up;
 595
 596     struct AVCodec *codec;
 597
 598     void *priv_data;
 599
 600     /* The following data is for RTP friendly coding */
 601     /* By now only H.263/H.263+/MPEG4 coder honours this   */
 602     int rtp_mode;   /* 1 for activate RTP friendly-mode           */
 603                     /* highers numbers represent more error-prone */
 604                     /* enviroments, by now just "1" exist         */
 605
 606     int rtp_payload_size;   /* The size of the RTP payload, the coder will  */
 607                             /* do it's best to deliver a chunk with size    */
 608                             /* below rtp_payload_size, the chunk will start */
 609                             /* with a start code on some codecs like H.263  */
 610                             /* This doesn't take account of any particular  */
 611                             /* headers inside the transmited RTP payload    */
 612
 613
 614     /* The RTP callcack: This function is called  */
 615     /* every time the encoder as a packet to send */
 616     /* Depends on the encoder if the data starts  */
 617     /* with a Start Code (it should) H.263 does   */
 618     void (*rtp_callback)(void *data, int size, int packet_number);
 619
 620     /* statistics, used for 2-pass encoding */
 621     int mv_bits;
 622     int header_bits;
 623     int i_tex_bits;
 624     int p_tex_bits;
 625     int i_count;
 626     int p_count;
 627     int skip_count;
 628     int misc_bits;
 629
 630     /**
 631      * number of bits used for the previously encoded frame.
 632      * - encoding: set by lavc
 633      * - decoding: unused
 634      */
 635     int frame_bits;
 636
 637     /**
 638      * private data of the user, can be used to carry app specific stuff.
 639      * - encoding: set by user
 640      * - decoding: set by user
 641      */
 642     void *opaque;
 643
 644     char codec_name[32];
 645     enum CodecType codec_type; /* see CODEC_TYPE_xxx */
 646     enum CodecID codec_id; /* see CODEC_ID_xxx */
 647
 648     /**
 649      * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
 650      * this is used to workaround some encoder bugs
 651      * - encoding: set by user, if not then the default based on codec_id will be used
 652      * - decoding: set by user, will be converted to upper case by lavc during init
 653      */
 654     unsigned int codec_tag;
 655
 656     /**
 657      * workaround bugs in encoders which sometimes cannot be detected automatically.
 658      * - encoding: unused
 659      * - decoding: set by user
 660      */
 661     int workaround_bugs;
 662 #define FF_BUG_AUTODETECT       1  ///< autodetection
 663 #define FF_BUG_OLD_MSMPEG4      2
 664 #define FF_BUG_XVID_ILACE       4
 665 #define FF_BUG_UMP4             8
 666 #define FF_BUG_NO_PADDING       16
 667 #define FF_BUG_AC_VLC           32
 668 #define FF_BUG_QPEL_CHROMA      64
 669 #define FF_BUG_STD_QPEL         128
 670 #define FF_BUG_QPEL_CHROMA2     256
 671 #define FF_BUG_DIRECT_BLOCKSIZE 512
 672 #define FF_BUG_EDGE             1024
 673 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
 674
 675     /**
 676      * luma single coeff elimination threshold.
 677      * - encoding: set by user
 678      * - decoding: unused
 679      */
 680     int luma_elim_threshold;
 681
 682     /**
 683      * chroma single coeff elimination threshold.
 684      * - encoding: set by user
 685      * - decoding: unused
 686      */
 687     int chroma_elim_threshold;
 688
 689     /**
 690      * strictly follow the std (MPEG4, ...).
 691      * - encoding: set by user
 692      * - decoding: unused
 693      */
 694     int strict_std_compliance;
 695
 696     /**
 697      * qscale offset between ip and b frames.
 698      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
 699      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
 700      * - encoding: set by user.
 701      * - decoding: unused
 702      */
 703     float b_quant_offset;
 704
 705     /**
 706      * error resilience higher values will detect more errors but may missdetect
 707      * some more or less valid parts as errors.
 708      * - encoding: unused
 709      * - decoding: set by user
 710      */
 711     int error_resilience;
 712 #define FF_ER_CAREFULL        1
 713 #define FF_ER_COMPLIANT       2
 714 #define FF_ER_AGGRESSIVE      3
 715 #define FF_ER_VERY_AGGRESSIVE 4
 716
 717     /**
 718      * called at the beginning of each frame to get a buffer for it.
 719      * if pic.reference is set then the frame will be read later by lavc
 720      * width and height should be rounded up to the next multiple of 16
 721      * - encoding: unused
 722      * - decoding: set by lavc, user can override
 723      */
 724     int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
 725
 726     /**
 727      * called to release buffers which where allocated with get_buffer.
 728      * a released buffer can be reused in get_buffer()
 729      * pic.data[*] must be set to NULL
 730      * - encoding: unused
 731      * - decoding: set by lavc, user can override
 732      */
 733     void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
 734
 735     /**
 736      * is 1 if the decoded stream contains b frames, 0 otherwise.
 737      * - encoding: unused
 738      * - decoding: set by lavc
 739      */
 740     int has_b_frames;
 741
 742     int block_align; ///< used by some WAV based audio codecs
 743
 744     int parse_only; /* - decoding only: if true, only parsing is done
 745                        (function avcodec_parse_frame()). The frame
 746                        data is returned. Only MPEG codecs support this now. */
 747
 748     /**
 749      * 0-> h263 quant 1-> mpeg quant.
 750      * - encoding: set by user.
 751      * - decoding: unused
 752      */
 753     int mpeg_quant;
 754
 755     /**
 756      * pass1 encoding statistics output buffer.
 757      * - encoding: set by lavc
 758      * - decoding: unused
 759      */
 760     char *stats_out;
 761
 762     /**
 763      * pass2 encoding statistics input buffer.
 764      * concatenated stuff from stats_out of pass1 should be placed here
 765      * - encoding: allocated/set/freed by user
 766      * - decoding: unused
 767      */
 768     char *stats_in;
 769
 770     /**
 771      * ratecontrol qmin qmax limiting method.
 772      * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
 773      * - encoding: set by user.
 774      * - decoding: unused
 775      */
 776     float rc_qsquish;
 777
 778     float rc_qmod_amp;
 779     int rc_qmod_freq;
 780
 781     /**
 782      * ratecontrol override, see RcOverride.
 783      * - encoding: allocated/set/freed by user.
 784      * - decoding: unused
 785      */
 786     RcOverride *rc_override;
 787     int rc_override_count;
 788
 789     /**
 790      * rate control equation.
 791      * - encoding: set by user
 792      * - decoding: unused
 793      */
 794     char *rc_eq;
 795
 796     /**
 797      * maximum bitrate.
 798      * - encoding: set by user.
 799      * - decoding: unused
 800      */
 801     int rc_max_rate;
 802
 803     /**
 804      * minimum bitrate.
 805      * - encoding: set by user.
 806      * - decoding: unused
 807      */
 808     int rc_min_rate;
 809
 810     /**
 811      * decoder bitstream buffer size.
 812      * - encoding: set by user.
 813      * - decoding: unused
 814      */
 815     int rc_buffer_size;
 816     float rc_buffer_aggressivity;
 817
 818     /**
 819      * qscale factor between p and i frames.
 820      * - encoding: set by user.
 821      * - decoding: unused
 822      */
 823     float i_quant_factor;
 824
 825     /**
 826      * qscale offset between p and i frames.
 827      * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
 828      * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
 829      * - encoding: set by user.
 830      * - decoding: unused
 831      */
 832     float i_quant_offset;
 833
 834     /**
 835      * initial complexity for pass1 ratecontrol.
 836      * - encoding: set by user.
 837      * - decoding: unused
 838      */
 839     float rc_initial_cplx;
 840
 841     /**
 842      * dct algorithm, see FF_DCT_* below.
 843      * - encoding: set by user
 844      * - decoding: unused
 845      */
 846     int dct_algo;
 847 #define FF_DCT_AUTO    0
 848 #define FF_DCT_FASTINT 1
 849 #define FF_DCT_INT     2
 850 #define FF_DCT_MMX     3
 851 #define FF_DCT_MLIB    4
 852 #define FF_DCT_ALTIVEC 5
 853
 854     /**
 855      * luminance masking (0-> disabled).
 856      * - encoding: set by user
 857      * - decoding: unused
 858      */
 859     float lumi_masking;
 860
 861     /**
 862      * temporary complexity masking (0-> disabled).
 863      * - encoding: set by user
 864      * - decoding: unused
 865      */
 866     float temporal_cplx_masking;
 867
 868     /**
 869      * spatial complexity masking (0-> disabled).
 870      * - encoding: set by user
 871      * - decoding: unused
 872      */
 873     float spatial_cplx_masking;
 874
 875     /**
 876      * p block masking (0-> disabled).
 877      * - encoding: set by user
 878      * - decoding: unused
 879      */
 880     float p_masking;
 881
 882     /**
 883      * darkness masking (0-> disabled).
 884      * - encoding: set by user
 885      * - decoding: unused
 886      */
 887     float dark_masking;
 888
 889
 890     /* for binary compatibility */
 891     int unused;
 892
 893     /**
 894      * idct algorithm, see FF_IDCT_* below.
 895      * - encoding: set by user
 896      * - decoding: set by user
 897      */
 898     int idct_algo;
 899 #define FF_IDCT_AUTO         0
 900 #define FF_IDCT_INT          1
 901 #define FF_IDCT_SIMPLE       2
 902 #define FF_IDCT_SIMPLEMMX    3
 903 #define FF_IDCT_LIBMPEG2MMX  4
 904 #define FF_IDCT_PS2          5
 905 #define FF_IDCT_MLIB         6
 906 #define FF_IDCT_ARM          7
 907 #define FF_IDCT_ALTIVEC      8
 908 #define FF_IDCT_SH4          9
 909 #define FF_IDCT_SIMPLEARM    10
 910
 911     /**
 912      * slice count.
 913      * - encoding: set by lavc
 914      * - decoding: set by user (or 0)
 915      */
 916     int slice_count;
 917     /**
 918      * slice offsets in the frame in bytes.
 919      * - encoding: set/allocated by lavc
 920      * - decoding: set/allocated by user (or NULL)
 921      */
 922     int *slice_offset;
 923
 924     /**
 925      * error concealment flags.
 926      * - encoding: unused
 927      * - decoding: set by user
 928      */
 929     int error_concealment;
 930 #define FF_EC_GUESS_MVS   1
 931 #define FF_EC_DEBLOCK     2
 932
 933     /**
 934      * dsp_mask could be add used to disable unwanted CPU features
 935      * CPU features (i.e. MMX, SSE. ...)
 936      *
 937      * with FORCE flag you may instead enable given CPU features
 938      * (Dangerous: usable in case of misdetection, improper usage however will
 939      * result into program crash)
 940      */
 941     unsigned dsp_mask;
 942 #define FF_MM_FORCE     0x80000000 /* force usage of selected flags (OR) */
 943     /* lower 16 bits - CPU features */
 944 #ifdef HAVE_MMX
 945 #define FF_MM_MMX       0x0001 /* standard MMX */
 946 #define FF_MM_3DNOW     0x0004 /* AMD 3DNOW */
 947 #define FF_MM_MMXEXT    0x0002 /* SSE integer functions or AMD MMX ext */
 948 #define FF_MM_SSE       0x0008 /* SSE functions */
 949 #define FF_MM_SSE2      0x0010 /* PIV SSE2 functions */
 950 #endif /* HAVE_MMX */
 951
 952     /**
 953      * bits per sample/pixel from the demuxer (needed for huffyuv).
 954      * - encoding: set by lavc
 955      * - decoding: set by user
 956      */
 957      int bits_per_sample;
 958
 959     /**
 960      * prediction method (needed for huffyuv).
 961      * - encoding: set by user
 962      * - decoding: unused
 963      */
 964      int prediction_method;
 965 #define FF_PRED_LEFT   0
 966 #define FF_PRED_PLANE  1
 967 #define FF_PRED_MEDIAN 2
 968
 969     /**
 970      * aspect ratio (0 if unknown).
 971      * - encoding: set by user.
 972      * - decoding: set by lavc.
 973      */
 974     float aspect_ratio;
 975
 976     /**
 977      * the picture in the bitstream.
 978      * - encoding: set by lavc
 979      * - decoding: set by lavc
 980      */
 981     AVFrame *coded_frame;
 982
 983     /**
 984      * debug.
 985      * - encoding: set by user.
 986      * - decoding: set by user.
 987      */
 988     int debug;
 989 #define FF_DEBUG_PICT_INFO 1
 990 #define FF_DEBUG_RC        2
 991 #define FF_DEBUG_BITSTREAM 4
 992 #define FF_DEBUG_MB_TYPE   8
 993 #define FF_DEBUG_QP        16
 994 #define FF_DEBUG_MV        32
 995 #define FF_DEBUG_VIS_MV    0x00000040
 996 #define FF_DEBUG_SKIP      0x00000080
 997 #define FF_DEBUG_STARTCODE 0x00000100
 998 #define FF_DEBUG_PTS       0x00000200
 999 #define FF_DEBUG_ER        0x00000400
1000 #define FF_DEBUG_MMCO      0x00000800
1001 #define FF_DEBUG_BUGS      0x00001000
1002
1003     /**
1004      * error.
1005      * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1006      * - decoding: unused
1007      */
1008     uint64_t error[4];
1009
1010     /**
1011      * minimum MB quantizer.
1012      * - encoding: set by user.
1013      * - decoding: unused
1014      */
1015     int mb_qmin;
1016
1017     /**
1018      * maximum MB quantizer.
1019      * - encoding: set by user.
1020      * - decoding: unused
1021      */
1022     int mb_qmax;
1023
1024     /**
1025      * motion estimation compare function.
1026      * - encoding: set by user.
1027      * - decoding: unused
1028      */
1029     int me_cmp;
1030     /**
1031      * subpixel motion estimation compare function.
1032      * - encoding: set by user.
1033      * - decoding: unused
1034      */
1035     int me_sub_cmp;
1036     /**
1037      * macroblock compare function (not supported yet).
1038      * - encoding: set by user.
1039      * - decoding: unused
1040      */
1041     int mb_cmp;
1042 #define FF_CMP_SAD  0
1043 #define FF_CMP_SSE  1
1044 #define FF_CMP_SATD 2
1045 #define FF_CMP_DCT  3
1046 #define FF_CMP_PSNR 4
1047 #define FF_CMP_BIT  5
1048 #define FF_CMP_RD   6
1049 #define FF_CMP_ZERO 7
1050 #define FF_CMP_CHROMA 256
1051
1052     /**
1053      * ME diamond size & shape.
1054      * - encoding: set by user.
1055      * - decoding: unused
1056      */
1057     int dia_size;
1058
1059     /**
1060      * amount of previous MV predictors (2a+1 x 2a+1 square).
1061      * - encoding: set by user.
1062      * - decoding: unused
1063      */
1064     int last_predictor_count;
1065
1066     /**
1067      * pre pass for motion estimation.
1068      * - encoding: set by user.
1069      * - decoding: unused
1070      */
1071     int pre_me;
1072
1073     /**
1074      * motion estimation pre pass compare function.
1075      * - encoding: set by user.
1076      * - decoding: unused
1077      */
1078     int me_pre_cmp;
1079
1080     /**
1081      * ME pre pass diamond size & shape.
1082      * - encoding: set by user.
1083      * - decoding: unused
1084      */
1085     int pre_dia_size;
1086
1087     /**
1088      * subpel ME quality.
1089      * - encoding: set by user.
1090      * - decoding: unused
1091      */
1092     int me_subpel_quality;
1093
1094     /**
1095      * callback to negotiate the pixelFormat.
1096      * @param fmt is the list of formats which are supported by the codec,
1097      * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1098      * the first is allways the native one
1099      * @return the choosen format
1100      * - encoding: unused
1101      * - decoding: set by user, if not set then the native format will always be choosen
1102      */
1103     enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
1104
1105     /**
1106      * DTG active format information (additionnal aspect ratio
1107      * information only used in DVB MPEG2 transport streams). 0 if
1108      * not set.
1109      *
1110      * - encoding: unused.
1111      * - decoding: set by decoder
1112      */
1113     int dtg_active_format;
1114 #define FF_DTG_AFD_SAME         8
1115 #define FF_DTG_AFD_4_3          9
1116 #define FF_DTG_AFD_16_9         10
1117 #define FF_DTG_AFD_14_9         11
1118 #define FF_DTG_AFD_4_3_SP_14_9  13
1119 #define FF_DTG_AFD_16_9_SP_14_9 14
1120 #define FF_DTG_AFD_SP_4_3       15
1121
1122     /**
1123      * Maximum motion estimation search range in subpel units.
1124      * if 0 then no limit
1125      *
1126      * - encoding: set by user.
1127      * - decoding: unused.
1128      */
1129     int me_range;
1130
1131     /**
1132      * frame_rate_base.
1133      * for variable fps this is 1
1134      * - encoding: set by user.
1135      * - decoding: set by lavc.
1136      * @todo move this after frame_rate
1137      */
1138
1139     int frame_rate_base;
1140     /**
1141      * intra quantizer bias.
1142      * - encoding: set by user.
1143      * - decoding: unused
1144      */
1145     int intra_quant_bias;
1146 #define FF_DEFAULT_QUANT_BIAS 999999
1147
1148     /**
1149      * inter quantizer bias.
1150      * - encoding: set by user.
1151      * - decoding: unused
1152      */
1153     int inter_quant_bias;
1154
1155     /**
1156      * color table ID.
1157      * - encoding: unused.
1158      * - decoding: which clrtable should be used for 8bit RGB images
1159      *             table have to be stored somewhere FIXME
1160      */
1161     int color_table_id;
1162
1163     /**
1164      * internal_buffer count.
1165      * Dont touch, used by lavc default_get_buffer()
1166      */
1167     int internal_buffer_count;
1168
1169     /**
1170      * internal_buffers.
1171      * Dont touch, used by lavc default_get_buffer()
1172      */
1173     void *internal_buffer;
1174
1175 #define FF_QUALITY_SCALE 256
1176     /**
1177      * global quality for codecs which cannot change it per frame.
1178      * this should be proportional to MPEG1/2/4 qscale.
1179      * - encoding: set by user.
1180      * - decoding: unused
1181      */
1182     int global_quality;
1183
1184 #define FF_CODER_TYPE_VLC   0
1185 #define FF_CODER_TYPE_AC    1
1186     /**
1187      * coder type
1188      * - encoding: set by user.
1189      * - decoding: unused
1190      */
1191     int coder_type;
1192
1193     /**
1194      * context model
1195      * - encoding: set by user.
1196      * - decoding: unused
1197      */
1198     int context_model;
1199
1200     /**
1201      * slice flags
1202      * - encoding: unused
1203      * - decoding: set by user.
1204      */
1205     int slice_flags;
1206 #define SLICE_FLAG_CODED_ORDER    0x0001 ///< draw_horiz_band() is called in coded order instead of display
1207 #define SLICE_FLAG_ALLOW_FIELD    0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1208 #define SLICE_FLAG_ALLOW_PLANE    0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1209
1210     /**
1211      * XVideo Motion Acceleration
1212      * - encoding: forbidden
1213      * - decoding: set by decoder
1214      */
1215     int xvmc_acceleration;
1216
1217     /**
1218      * macroblock decision mode
1219      * - encoding: set by user.
1220      * - decoding: unused
1221      */
1222     int mb_decision;
1223 #define FF_MB_DECISION_SIMPLE 0        ///< uses mb_cmp
1224 #define FF_MB_DECISION_BITS   1        ///< chooses the one which needs the fewest bits
1225 #define FF_MB_DECISION_RD     2        ///< rate distoration
1226
1227     /**
1228      * custom intra quantization matrix
1229      * - encoding: set by user, can be NULL
1230      * - decoding: set by lavc
1231      */
1232     uint16_t *intra_matrix;
1233
1234     /**
1235      * custom inter quantization matrix
1236      * - encoding: set by user, can be NULL
1237      * - decoding: set by lavc
1238      */
1239     uint16_t *inter_matrix;
1240
1241     /**
1242      * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1243      * this is used to workaround some encoder bugs
1244      * - encoding: unused
1245      * - decoding: set by user, will be converted to upper case by lavc during init
1246      */
1247     unsigned int stream_codec_tag;
1248
1249     /**
1250      * scene change detection threshold.
1251      * 0 is default, larger means fewer detected scene changes
1252      * - encoding: set by user.
1253      * - decoding: unused
1254      */
1255     int scenechange_threshold;
1256 } AVCodecContext;
1257
1258
1259 /**
1260  * AVOption.
1261  */
1262 typedef struct AVOption {
1263     /** options' name */
1264     const char *name; /* if name is NULL, it indicates a link to next */
1265     /** short English text help or const struct AVOption* subpointer */
1266     const char *help; //        const struct AVOption* sub;
1267     /** offset to context structure where the parsed value should be stored */
1268     int offset;
1269     /** options' type */
1270     int type;
1271 #define FF_OPT_TYPE_BOOL 1      ///< boolean - true,1,on  (or simply presence)
1272 #define FF_OPT_TYPE_DOUBLE 2    ///< double
1273 #define FF_OPT_TYPE_INT 3       ///< integer
1274 #define FF_OPT_TYPE_STRING 4    ///< string (finished with \0)
1275 #define FF_OPT_TYPE_MASK 0x1f   ///< mask for types - upper bits are various flags
1276 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1277 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1278 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1279     /** min value  (min == max   ->  no limits) */
1280     double min;
1281     /** maximum value for double/int */
1282     double max;
1283     /** default boo [0,1]l/double/int value */
1284     double defval;
1285     /**
1286      * default string value (with optional semicolon delimited extra option-list
1287      * i.e.   option1;option2;option3
1288      * defval might select other then first argument as default
1289      */
1290     const char *defstr;
1291 #define FF_OPT_MAX_DEPTH 10
1292 } AVOption;
1293
1294 /**
1295  * Parse option(s) and sets fields in passed structure
1296  * @param strct structure where the parsed results will be written
1297  * @param list  list with AVOptions
1298  * @param opts  string with options for parsing
1299  */
1300 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1301
1302
1303 /**
1304  * AVCodec.
1305  */
1306 typedef struct AVCodec {
1307     const char *name;
1308     enum CodecType type;
1309     int id;
1310     int priv_data_size;
1311     int (*init)(AVCodecContext *);
1312     int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1313     int (*close)(AVCodecContext *);
1314     int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1315                   uint8_t *buf, int buf_size);
1316     int capabilities;
1317     const AVOption *options;
1318     struct AVCodec *next;
1319     void (*flush)(AVCodecContext *);
1320 } AVCodec;
1321
1322 /**
1323  * four components are given, that's all.
1324  * the last component is alpha
1325  */
1326 typedef struct AVPicture {
1327     uint8_t *data[4];
1328     int linesize[4];       ///< number of bytes per line
1329 } AVPicture;
1330
1331 /**
1332  * AVPaletteControl
1333  * This structure defines a method for communicating palette changes
1334  * between and demuxer and a decoder.
1335  */
1336 typedef struct AVPaletteControl {
1337
1338     /* demuxer sets this to 1 to indicate the palette has changed;
1339      * decoder resets to 0 */
1340     int palette_changed;
1341
1342     /* 256 3-byte RGB palette entries; the components should be
1343      * formatted in the buffer as "RGBRGB..." and should be scaled to
1344      * 8 bits if they originally represented 6-bit VGA palette
1345      * components */
1346     unsigned char palette[256 * 3];
1347
1348 } AVPaletteControl;
1349
1350 extern AVCodec ac3_encoder;
1351 extern AVCodec mp2_encoder;
1352 extern AVCodec mp3lame_encoder;
1353 extern AVCodec oggvorbis_encoder;
1354 extern AVCodec mpeg1video_encoder;
1355 extern AVCodec mpeg2video_encoder;
1356 extern AVCodec h263_encoder;
1357 extern AVCodec h263p_encoder;
1358 extern AVCodec flv_encoder;
1359 extern AVCodec rv10_encoder;
1360 extern AVCodec mjpeg_encoder;
1361 extern AVCodec ljpeg_encoder;
1362 extern AVCodec mpeg4_encoder;
1363 extern AVCodec msmpeg4v1_encoder;
1364 extern AVCodec msmpeg4v2_encoder;
1365 extern AVCodec msmpeg4v3_encoder;
1366 extern AVCodec wmv1_encoder;
1367 extern AVCodec wmv2_encoder;
1368 extern AVCodec huffyuv_encoder;
1369 extern AVCodec h264_encoder;
1370 extern AVCodec asv1_encoder;
1371 extern AVCodec asv2_encoder;
1372 extern AVCodec vcr1_encoder;
1373 extern AVCodec ffv1_encoder;
1374 extern AVCodec mdec_encoder;
1375
1376 extern AVCodec h263_decoder;
1377 extern AVCodec mpeg4_decoder;
1378 extern AVCodec msmpeg4v1_decoder;
1379 extern AVCodec msmpeg4v2_decoder;
1380 extern AVCodec msmpeg4v3_decoder;
1381 extern AVCodec wmv1_decoder;
1382 extern AVCodec wmv2_decoder;
1383 extern AVCodec mpeg1video_decoder;
1384 extern AVCodec mpeg2video_decoder;
1385 extern AVCodec mpeg_xvmc_decoder;
1386 extern AVCodec h263i_decoder;
1387 extern AVCodec flv_decoder;
1388 extern AVCodec rv10_decoder;
1389 extern AVCodec svq1_decoder;
1390 extern AVCodec svq3_decoder;
1391 extern AVCodec dvvideo_decoder;
1392 extern AVCodec wmav1_decoder;
1393 extern AVCodec wmav2_decoder;
1394 extern AVCodec mjpeg_decoder;
1395 extern AVCodec mjpegb_decoder;
1396 extern AVCodec mp2_decoder;
1397 extern AVCodec mp3_decoder;
1398 extern AVCodec mace3_decoder;
1399 extern AVCodec mace6_decoder;
1400 extern AVCodec huffyuv_decoder;
1401 extern AVCodec oggvorbis_decoder;
1402 extern AVCodec cyuv_decoder;
1403 extern AVCodec h264_decoder;
1404 extern AVCodec indeo3_decoder;
1405 extern AVCodec vp3_decoder;
1406 extern AVCodec amr_nb_decoder;
1407 extern AVCodec amr_nb_encoder;
1408 extern AVCodec amr_wb_encoder;
1409 extern AVCodec amr_wb_decoder;
1410 extern AVCodec aac_decoder;
1411 extern AVCodec mpeg4aac_decoder;
1412 extern AVCodec asv1_decoder;
1413 extern AVCodec asv2_decoder;
1414 extern AVCodec vcr1_decoder;
1415 extern AVCodec cljr_decoder;
1416 extern AVCodec ffv1_decoder;
1417 extern AVCodec fourxm_decoder;
1418 extern AVCodec mdec_decoder;
1419 extern AVCodec roq_decoder;
1420 extern AVCodec interplay_video_decoder;
1421 extern AVCodec xan_wc3_decoder;
1422 extern AVCodec ra_144_decoder;
1423 extern AVCodec ra_288_decoder;
1424 extern AVCodec roq_dpcm_decoder;
1425 extern AVCodec interplay_dpcm_decoder;
1426 extern AVCodec xan_dpcm_decoder;
1427
1428 /* pcm codecs */
1429 #define PCM_CODEC(id, name) \
1430 extern AVCodec name ## _decoder; \
1431 extern AVCodec name ## _encoder
1432
1433 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1434 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1435 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1436 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1437 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1438 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1439 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1440 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1441
1442 /* adpcm codecs */
1443
1444 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1445 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1446 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1447 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1448 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1449 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1450
1451 #undef PCM_CODEC
1452
1453 /* dummy raw video codec */
1454 extern AVCodec rawvideo_encoder;
1455 extern AVCodec rawvideo_decoder;
1456
1457 /* the following codecs use external GPL libs */
1458 extern AVCodec ac3_decoder;
1459
1460 /* resample.c */
1461
1462 struct ReSampleContext;
1463
1464 typedef struct ReSampleContext ReSampleContext;
1465
1466 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1467                                      int output_rate, int input_rate);
1468 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1469 void audio_resample_close(ReSampleContext *s);
1470
1471 /* YUV420 format is assumed ! */
1472
1473 struct ImgReSampleContext;
1474
1475 typedef struct ImgReSampleContext ImgReSampleContext;
1476
1477 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1478                                       int input_width, int input_height);
1479
1480 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1481                                       int iwidth, int iheight,
1482                                       int topBand, int bottomBand,
1483                                       int leftBand, int rightBand);
1484
1485 void img_resample(ImgReSampleContext *s,
1486                   AVPicture *output, const AVPicture *input);
1487
1488 void img_resample_close(ImgReSampleContext *s);
1489
1490 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1491                    int pix_fmt, int width, int height);
1492 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1493                      unsigned char *dest, int dest_size);
1494 int avpicture_get_size(int pix_fmt, int width, int height);
1495 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1496 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1497 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1498
1499 #define FF_LOSS_RESOLUTION  0x0001 /* loss due to resolution change */
1500 #define FF_LOSS_DEPTH       0x0002 /* loss due to color depth change */
1501 #define FF_LOSS_COLORSPACE  0x0004 /* loss due to color space conversion */
1502 #define FF_LOSS_ALPHA       0x0008 /* loss of alpha bits */
1503 #define FF_LOSS_COLORQUANT  0x0010 /* loss due to color quantization */
1504 #define FF_LOSS_CHROMA      0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1505
1506 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1507                              int has_alpha);
1508 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1509                               int has_alpha, int *loss_ptr);
1510
1511 #define FF_ALPHA_TRANSP       0x0001 /* image has some totally transparent pixels */
1512 #define FF_ALPHA_SEMI_TRANSP  0x0002 /* image has some transparent pixels */
1513 int img_get_alpha_info(const AVPicture *src,
1514                        int pix_fmt, int width, int height);
1515
1516 /* convert among pixel formats */
1517 int img_convert(AVPicture *dst, int dst_pix_fmt,
1518                 const AVPicture *src, int pix_fmt,
1519                 int width, int height);
1520
1521 /* deinterlace a picture */
1522 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1523                           int pix_fmt, int width, int height);
1524
1525 /* external high level API */
1526
1527 extern AVCodec *first_avcodec;
1528
1529 /* returns LIBAVCODEC_VERSION_INT constant */
1530 unsigned avcodec_version(void);
1531 /* returns LIBAVCODEC_BUILD constant */
1532 unsigned avcodec_build(void);
1533 void avcodec_init(void);
1534
1535 void register_avcodec(AVCodec *format);
1536 AVCodec *avcodec_find_encoder(enum CodecID id);
1537 AVCodec *avcodec_find_encoder_by_name(const char *name);
1538 AVCodec *avcodec_find_decoder(enum CodecID id);
1539 AVCodec *avcodec_find_decoder_by_name(const char *name);
1540 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1541
1542 void avcodec_get_context_defaults(AVCodecContext *s);
1543 AVCodecContext *avcodec_alloc_context(void);
1544 AVFrame *avcodec_alloc_frame(void);
1545
1546 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1547 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1548 void avcodec_default_free_buffers(AVCodecContext *s);
1549
1550 /**
1551  * opens / inits the AVCodecContext.
1552  * not thread save!
1553  */
1554 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1555
1556 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1557                          int *frame_size_ptr,
1558                          uint8_t *buf, int buf_size);
1559 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1560                          int *got_picture_ptr,
1561                          uint8_t *buf, int buf_size);
1562 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
1563                         int *data_size_ptr,
1564                         uint8_t *buf, int buf_size);
1565 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1566                          const short *samples);
1567 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1568                          const AVFrame *pict);
1569
1570 int avcodec_close(AVCodecContext *avctx);
1571
1572 void avcodec_register_all(void);
1573
1574 void avcodec_flush_buffers(AVCodecContext *avctx);
1575
1576 /* misc usefull functions */
1577
1578 /**
1579  * returns a single letter to describe the picture type
1580  */
1581 char av_get_pict_type_char(int pict_type);
1582
1583 /**
1584  * reduce a fraction.
1585  * this is usefull for framerate calculations
1586  * @param max the maximum allowed for dst_nom & dst_den
1587  * @return 1 if exact, 0 otherwise
1588  */
1589 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1590
1591 /**
1592  * rescale a 64bit integer.
1593  * a simple a*b/c isnt possible as it can overflow
1594  */
1595 int64_t av_rescale(int64_t a, int b, int c);
1596
1597
1598 /**
1599  * Interface for 0.5.0 version
1600  *
1601  * do not even think about it's usage for this moment
1602  */
1603
1604 typedef struct {
1605     /// compressed size used from given memory buffer
1606     int size;
1607     /// I/P/B frame type
1608     int frame_type;
1609 } avc_enc_result_t;
1610
1611 /**
1612  * Commands
1613  * order can't be changed - once it was defined
1614  */
1615 typedef enum {
1616     // general commands
1617     AVC_OPEN_BY_NAME = 0xACA000,
1618     AVC_OPEN_BY_CODEC_ID,
1619     AVC_OPEN_BY_FOURCC,
1620     AVC_CLOSE,
1621
1622     AVC_FLUSH,
1623     // pin - struct { uint8_t* src, uint_t src_size }
1624     // pout - struct { AVPicture* img, consumed_bytes,
1625     AVC_DECODE,
1626     // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1627     // pout - uint_t used_from_dest_size
1628     AVC_ENCODE,
1629
1630     // query/get video commands
1631     AVC_GET_VERSION = 0xACB000,
1632     AVC_GET_WIDTH,
1633     AVC_GET_HEIGHT,
1634     AVC_GET_DELAY,
1635     AVC_GET_QUANT_TABLE,
1636     // ...
1637
1638     // query/get audio commands
1639     AVC_GET_FRAME_SIZE = 0xABC000,
1640
1641     // maybe define some simple structure which
1642     // might be passed to the user - but they can't
1643     // contain any codec specific parts and these
1644     // calls are usualy necessary only few times
1645
1646     // set video commands
1647     AVC_SET_WIDTH = 0xACD000,
1648     AVC_SET_HEIGHT,
1649
1650     // set video encoding commands
1651     AVC_SET_FRAME_RATE = 0xACD800,
1652     AVC_SET_QUALITY,
1653     AVC_SET_HURRY_UP,
1654
1655     // set audio commands
1656     AVC_SET_SAMPLE_RATE = 0xACE000,
1657     AVC_SET_CHANNELS,
1658
1659 } avc_cmd_t;
1660
1661 /**
1662  * \param handle  allocated private structure by libavcodec
1663  *                for initialization pass NULL - will be returned pout
1664  *                user is supposed to know nothing about its structure
1665  * \param cmd     type of operation to be performed
1666  * \param pint    input parameter
1667  * \param pout    output parameter
1668  *
1669  * \returns  command status - eventually for query command it might return
1670  * integer resulting value
1671  */
1672 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1673
1674 /* memory */
1675 void *av_malloc(unsigned int size);
1676 void *av_mallocz(unsigned int size);
1677 void *av_realloc(void *ptr, unsigned int size);
1678 void av_free(void *ptr);
1679 char *av_strdup(const char *s);
1680 void __av_freep(void **ptr);
1681 #define av_freep(p) __av_freep((void **)(p))
1682 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
1683 /* for static data only */
1684 /* call av_free_static to release all staticaly allocated tables */
1685 void av_free_static(void);
1686 void *__av_mallocz_static(void** location, unsigned int size);
1687 #define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
1688
1689 #ifdef __cplusplus
1690 }
1691 #endif
1692
1693 #endif /* AVCODEC_H */