libavcodec/avcodec.h

   1 #ifndef AVCODEC_H
   2 #define AVCODEC_H
   3
   4 #include "common.h"
   5
   6 #define LIBAVCODEC_VERSION_INT 0x000406
   7 #define LIBAVCODEC_VERSION     "0.4.6"
   8 #define LIBAVCODEC_BUILD       4618
   9 #define LIBAVCODEC_BUILD_STR   "4618"
  10
  11 enum CodecID {
  12     CODEC_ID_NONE,
  13     CODEC_ID_MPEG1VIDEO,
  14     CODEC_ID_H263,
  15     CODEC_ID_RV10,
  16     CODEC_ID_MP2,
  17     CODEC_ID_MP3LAME,
  18     CODEC_ID_AC3,
  19     CODEC_ID_MJPEG,
  20     CODEC_ID_MPEG4,
  21     CODEC_ID_RAWVIDEO,
  22     CODEC_ID_MSMPEG4V1,
  23     CODEC_ID_MSMPEG4V2,
  24     CODEC_ID_MSMPEG4V3,
  25     CODEC_ID_WMV1,
  26     CODEC_ID_WMV2,
  27     CODEC_ID_H263P,
  28     CODEC_ID_H263I,
  29     CODEC_ID_SVQ1,
  30
  31     /* various pcm "codecs" */
  32     CODEC_ID_PCM_S16LE,
  33     CODEC_ID_PCM_S16BE,
  34     CODEC_ID_PCM_U16LE,
  35     CODEC_ID_PCM_U16BE,
  36     CODEC_ID_PCM_S8,
  37     CODEC_ID_PCM_U8,
  38     CODEC_ID_PCM_MULAW,
  39     CODEC_ID_PCM_ALAW,
  40
  41     /* various adpcm codecs */
  42     CODEC_ID_ADPCM_IMA_QT,
  43     CODEC_ID_ADPCM_IMA_WAV,
  44     CODEC_ID_ADPCM_MS,
  45 };
  46 #define CODEC_ID_MSMPEG4 CODEC_ID_MSMPEG4V3
  47
  48 enum CodecType {
  49     CODEC_TYPE_UNKNOWN = -1,
  50     CODEC_TYPE_VIDEO,
  51     CODEC_TYPE_AUDIO,
  52 };
  53
  54 enum PixelFormat {
  55     PIX_FMT_ANY = -1,
  56     PIX_FMT_YUV420P,
  57     PIX_FMT_YUV422,
  58     PIX_FMT_RGB24,
  59     PIX_FMT_BGR24,
  60     PIX_FMT_YUV422P,
  61     PIX_FMT_YUV444P,
  62     PIX_FMT_YUV410P
  63 };
  64
  65 /* currently unused, may be used if 24/32 bits samples ever supported */
  66 enum SampleFormat {
  67     SAMPLE_FMT_S16 = 0,         /* signed 16 bits */
  68 };
  69
  70 /* in bytes */
  71 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 18432
  72
  73 /* motion estimation type, EPZS by default */
  74 enum Motion_Est_ID {
  75     ME_ZERO = 1,
  76     ME_FULL,
  77     ME_LOG,
  78     ME_PHODS,
  79     ME_EPZS,
  80     ME_X1
  81 };
  82
  83 /* only for ME compatiblity with old apps */
  84 extern int motion_estimation_method;
  85
  86 /* ME algos sorted by quality */
  87 static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
  88                                        ME_X1, ME_EPZS, ME_FULL };
  89
  90 #define FF_MAX_B_FRAMES 4
  91
  92 /* encoding support */
  93 /* note not everything is supported yet */
  94
  95 #define CODEC_FLAG_HQ     0x0001 /* high quality (non real time) encoding */
  96 #define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
  97 #define CODEC_FLAG_4MV    0x0004 /* 4 MV per MB allowed */
  98 #define CODEC_FLAG_QPEL   0x0010 /* use qpel MC */
  99 #define CODEC_FLAG_GMC    0x0020 /* use GMC */
 100 #define CODEC_FLAG_TYPE   0x0040 /* fixed I/P frame type, from avctx->key_frame */
 101 #define CODEC_FLAG_PART   0x0080 /* use data partitioning */
 102 /* parent program gurantees that the input for b-frame containing streams is not written to
 103    for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
 104 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
 105 #define CODEC_FLAG_PASS1 0x0200  /* use internal 2pass ratecontrol in first  pass mode */
 106 #define CODEC_FLAG_PASS2 0x0400  /* use internal 2pass ratecontrol in second pass mode */
 107 #define CODEC_FLAG_EXTERN_HUFF 0x1000 /* use external huffman table (for mjpeg) */
 108 #define CODEC_FLAG_GRAY  0x2000  /* only decode/encode grayscale */
 109 #define CODEC_FLAG_EMU_EDGE 0x4000/* dont draw edges */
 110 #define CODEC_FLAG_DR1    0x8000 /* dr1 */
 111 /* codec capabilities */
 112
 113 /* decoder can use draw_horiz_band callback */
 114 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001
 115 #define CODEC_CAP_DR1             0x0002 /* direct rendering method 1 */
 116 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
 117    used */
 118 #define CODEC_CAP_PARSE_ONLY      0x0004
 119
 120 #define FRAME_RATE_BASE 10000
 121
 122 typedef struct AVCodecContext {
 123     int bit_rate;
 124     int bit_rate_tolerance; /* amount of +- bits (>0)*/
 125     int flags;
 126     int sub_id;    /* some codecs needs additionnal format info. It is
 127                       stored there */
 128
 129     int me_method; /* ME algorithm used for video coding */
 130
 131     /* extra data from parent application to codec, e.g. huffman table
 132        for mjpeg */
 133     /* the parent should allocate and free this buffer */
 134     void *extradata;
 135     int extradata_size;
 136
 137     /* video only */
 138     int frame_rate; /* frames per sec multiplied by FRAME_RATE_BASE */
 139     int width, height;
 140     int aspect_ratio_info;
 141 #define FF_ASPECT_SQUARE 1
 142 #define FF_ASPECT_4_3_625 2
 143 #define FF_ASPECT_4_3_525 3
 144 #define FF_ASPECT_16_9_625 4
 145 #define FF_ASPECT_16_9_525 5
 146     int gop_size; /* 0 = intra only */
 147     enum PixelFormat pix_fmt;  /* pixel format, see PIX_FMT_xxx */
 148     int repeat_pict; /* when decoding, this signal how much the picture */
 149                      /* must be delayed.                                */
 150                      /* extra_delay = (repeat_pict / 2) * (1/fps)       */
 151     /* if non NULL, 'draw_horiz_band' is called by the libavcodec
 152        decoder to draw an horizontal band. It improve cache usage. Not
 153        all codecs can do that. You must check the codec capabilities
 154        before */
 155     void (*draw_horiz_band)(struct AVCodecContext *s,
 156                             UINT8 **src_ptr, int linesize,
 157                             int y, int width, int height);
 158
 159     /* audio only */
 160     int sample_rate; /* samples per sec */
 161     int channels;
 162     int sample_fmt;  /* sample format, currenly unused */
 163
 164     /* the following data should not be initialized */
 165     int frame_size;     /* in samples, initialized when calling 'init' */
 166     int frame_number;   /* audio or video frame number */
 167     int real_pict_num;  /* returns the real picture number of
 168                            previous encoded frame */
 169     int key_frame;      /* true if the previous compressed frame was
 170                            a key frame (intra, or seekable) */
 171     int pict_type;      /* picture type of the previous
 172                            encoded frame */
 173 /* FIXME: these should have FF_ */
 174 #define I_TYPE 1 // Intra
 175 #define P_TYPE 2 // Predicted
 176 #define B_TYPE 3 // Bi-dir predicted
 177 #define S_TYPE 4 // S(GMC)-VOP MPEG4
 178
 179     int delay;          /* number of frames the decoded output
 180                            will be delayed relative to the encoded input */
 181     uint8_t *mbskip_table; /* =1 if MB didnt change, is only valid for I/P frames
 182                               stride= mb_width = (width+15)>>4 */
 183
 184     /* encoding parameters */
 185     int quality;      /* quality of the previous encoded frame
 186                          (between 1 (good) and 31 (bad))
 187                          this is allso used to set the quality in vbr mode
 188                          and the per frame quality in CODEC_FLAG_TYPE (second pass mode) */
 189     float qcompress;  /* amount of qscale change between easy & hard scenes (0.0-1.0)*/
 190     float qblur;      /* amount of qscale smoothing over time (0.0-1.0) */
 191     int qmin;         /* min qscale */
 192     int qmax;         /* max qscale */
 193     int max_qdiff;    /* max qscale difference between frames */
 194     int max_b_frames; /* maximum b frames, the output will be delayed by max_b_frames+1 relative to the input */
 195     float b_quant_factor;/* qscale factor between ips and b frames */
 196     int rc_strategy;
 197     int b_frame_strategy;
 198
 199     int hurry_up;     /* when set to 1 during decoding, b frames will be skiped
 200                          when set to 2 idct/dequant will be skipped too */
 201
 202     struct AVCodec *codec;
 203     void *priv_data;
 204
 205     /* The following data is for RTP friendly coding */
 206     /* By now only H.263/H.263+/MPEG4 coder honours this   */
 207     int rtp_mode;   /* 1 for activate RTP friendly-mode           */
 208                     /* highers numbers represent more error-prone */
 209                     /* enviroments, by now just "1" exist         */
 210
 211     int rtp_payload_size;   /* The size of the RTP payload, the coder will  */
 212                             /* do it's best to deliver a chunk with size    */
 213                             /* below rtp_payload_size, the chunk will start */
 214                             /* with a start code on some codecs like H.263  */
 215                             /* This doesn't take account of any particular  */
 216                             /* headers inside the transmited RTP payload    */
 217
 218
 219     /* The RTP callcack: This function is called  */
 220     /* every time the encoder as a packet to send */
 221     /* Depends on the encoder if the data starts  */
 222     /* with a Start Code (it should) H.263 does   */
 223     void (*rtp_callback)(void *data, int size, int packet_number);
 224
 225     /* These are for PSNR calculation, if you set get_psnr to 1 */
 226     /* after encoding you will have the PSNR on psnr_y/cb/cr    */
 227     int get_psnr;
 228     float psnr_y;
 229     float psnr_cb;
 230     float psnr_cr;
 231
 232     /* statistics, used for 2-pass encoding */
 233     int mv_bits;
 234     int header_bits;
 235     int i_tex_bits;
 236     int p_tex_bits;
 237     int i_count;
 238     int p_count;
 239     int skip_count;
 240     int misc_bits; // cbp, mb_type
 241     int frame_bits;
 242
 243     /* the following fields are ignored */
 244     void *opaque;   /* can be used to carry app specific stuff */
 245     char codec_name[32];
 246     enum CodecType codec_type; /* see CODEC_TYPE_xxx */
 247     enum CodecID codec_id; /* see CODEC_ID_xxx */
 248     unsigned int codec_tag;  /* codec tag, only used if unknown codec */
 249
 250     int workaround_bugs;       /* workaround bugs in encoders which cannot be detected automatically */
 251     int luma_elim_threshold;
 252     int chroma_elim_threshold;
 253     int strict_std_compliance; /* strictly follow the std (MPEG4, ...) */
 254     float b_quant_offset;/* qscale offset between ips and b frames, not implemented yet */
 255     int error_resilience;
 256
 257 #ifndef MBC
 258 #define MBC 128
 259 #define MBR 96
 260 #endif
 261 #define QP_TYPE int //FIXME note xxx this might be changed to int8_t
 262
 263     QP_TYPE *quant_store; /* field for communicating with external postprocessing */
 264
 265     unsigned qstride;
 266     uint8_t *dr_buffer[3];
 267     int dr_stride;
 268     void *dr_opaque_frame;
 269     void (*get_buffer_callback)(struct AVCodecContext *c, int width, int height, int pict_type);
 270
 271     int has_b_frames; // is 1 if the decoded stream contains b frames
 272     int dr_uvstride;
 273     int dr_ip_buffer_count;
 274     int block_align; /* currently only for adpcm codec in wav/avi */
 275
 276     int parse_only; /* decoding only: if true, only parsing is done
 277                        (function avcodec_parse_frame()). The frame
 278                        data is returned. Only MPEG codecs support this now. */
 279
 280     //FIXME this should be reordered after kabis API is finished ...
 281     /*
 282         Note: Below are located reserved fields for further usage
 283         It requires for ABI !!!
 284         If you'll perform some changes then borrow new space from these fields
 285         (void * can be safety replaced with struct * ;)
 286         P L E A S E ! ! !
 287         IMPORTANT: Never change order of already declared fields!!!
 288     */
 289     unsigned long long int
 290             ull_res0,ull_res1,ull_res2,ull_res3,ull_res4,ull_res5,
 291             ull_res6,ull_res7,ull_res8,ull_res9,ull_res10,ull_res11,ull_res12;
 292     float
 293             flt_res0,flt_res1,flt_res2,flt_res3,flt_res4,flt_res5,
 294             flt_res6,flt_res7,flt_res8,flt_res9,flt_res10,flt_res11;
 295     void
 296             *ptr_res0,*ptr_res1,*ptr_res2,*ptr_res3,*ptr_res4,*ptr_res5,
 297             *ptr_res6;
 298     unsigned long int
 299             ul_res0,ul_res1,ul_res2,ul_res3,ul_res4,ul_res5,
 300             ul_res6,ul_res7,ul_res8,ul_res9,ul_res10,ul_res11,ul_res12;
 301     unsigned int
 302             ui_res0;
 303     unsigned short int
 304             us_res0,us_res1,us_res2,us_res3,us_res4,us_res5,
 305             us_res6,us_res7,us_res8,us_res9,us_res10,us_res11,us_res12;
 306     unsigned char
 307             uc_res0,uc_res1,uc_res2,uc_res3,uc_res4,uc_res5,
 308             uc_res6,uc_res7,uc_res8,uc_res9,uc_res10,uc_res11,uc_res12;
 309 } AVCodecContext;
 310
 311 typedef struct AVCodec {
 312     char *name;
 313     int type;
 314     int id;
 315     int priv_data_size;
 316     int (*init)(AVCodecContext *);
 317     int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
 318     int (*close)(AVCodecContext *);
 319     int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
 320                   UINT8 *buf, int buf_size);
 321     int capabilities;
 322     struct AVCodec *next;
 323     /*
 324         Note: Below are located reserved fields for further usage
 325         It requires for ABI !!!
 326         If you'll perform some changes then borrow new space from these fields
 327         (void * can be safety replaced with struct * ;)
 328         P L E A S E ! ! !
 329         IMPORTANT: Never change order of already declared fields!!!
 330     */
 331     unsigned long long int
 332             ull_res0,ull_res1,ull_res2,ull_res3,ull_res4,ull_res5,
 333             ull_res6,ull_res7,ull_res8,ull_res9,ull_res10,ull_res11,ull_res12;
 334     float
 335             flt_res0,flt_res1,flt_res2,flt_res3,flt_res4,flt_res5,
 336             flt_res6,flt_res7,flt_res8,flt_res9,flt_res10,flt_res11,flt_res12;
 337     void
 338             *ptr_res0,*ptr_res1,*ptr_res2,*ptr_res3,*ptr_res4,*ptr_res5,
 339             *ptr_res6,*ptr_res7,*ptr_res8,*ptr_res9,*ptr_res10,*ptr_res11,*ptr_res12;
 340 } AVCodec;
 341
 342 /* three components are given, that's all */
 343 typedef struct AVPicture {
 344     UINT8 *data[3];
 345     int linesize[3];
 346 } AVPicture;
 347
 348 extern AVCodec ac3_encoder;
 349 extern AVCodec mp2_encoder;
 350 extern AVCodec mp3lame_encoder;
 351 extern AVCodec mpeg1video_encoder;
 352 extern AVCodec h263_encoder;
 353 extern AVCodec h263p_encoder;
 354 extern AVCodec rv10_encoder;
 355 extern AVCodec mjpeg_encoder;
 356 extern AVCodec mpeg4_encoder;
 357 extern AVCodec msmpeg4v1_encoder;
 358 extern AVCodec msmpeg4v2_encoder;
 359 extern AVCodec msmpeg4v3_encoder;
 360 extern AVCodec wmv1_encoder;
 361 extern AVCodec wmv2_encoder;
 362
 363 extern AVCodec h263_decoder;
 364 extern AVCodec mpeg4_decoder;
 365 extern AVCodec msmpeg4v1_decoder;
 366 extern AVCodec msmpeg4v2_decoder;
 367 extern AVCodec msmpeg4v3_decoder;
 368 extern AVCodec wmv1_decoder;
 369 extern AVCodec wmv2_decoder;
 370 extern AVCodec mpeg_decoder;
 371 extern AVCodec h263i_decoder;
 372 extern AVCodec rv10_decoder;
 373 extern AVCodec svq1_decoder;
 374 extern AVCodec mjpeg_decoder;
 375 extern AVCodec mp2_decoder;
 376 extern AVCodec mp3_decoder;
 377
 378 /* pcm codecs */
 379 #define PCM_CODEC(id, name) \
 380 extern AVCodec name ## _decoder; \
 381 extern AVCodec name ## _encoder;
 382
 383 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
 384 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
 385 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
 386 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
 387 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
 388 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
 389 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
 390 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
 391
 392 /* adpcm codecs */
 393
 394 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
 395 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
 396 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
 397
 398 #undef PCM_CODEC
 399
 400 /* dummy raw video codec */
 401 extern AVCodec rawvideo_codec;
 402
 403 /* the following codecs use external GPL libs */
 404 extern AVCodec ac3_decoder;
 405
 406 /* resample.c */
 407
 408 struct ReSampleContext;
 409
 410 typedef struct ReSampleContext ReSampleContext;
 411
 412 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
 413                                      int output_rate, int input_rate);
 414 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
 415 void audio_resample_close(ReSampleContext *s);
 416
 417 /* YUV420 format is assumed ! */
 418
 419 struct ImgReSampleContext;
 420
 421 typedef struct ImgReSampleContext ImgReSampleContext;
 422
 423 ImgReSampleContext *img_resample_init(int output_width, int output_height,
 424                                       int input_width, int input_height);
 425 void img_resample(ImgReSampleContext *s,
 426                   AVPicture *output, AVPicture *input);
 427
 428 void img_resample_close(ImgReSampleContext *s);
 429
 430 void avpicture_fill(AVPicture *picture, UINT8 *ptr,
 431                     int pix_fmt, int width, int height);
 432 int avpicture_get_size(int pix_fmt, int width, int height);
 433
 434 /* convert among pixel formats */
 435 int img_convert(AVPicture *dst, int dst_pix_fmt,
 436                 AVPicture *src, int pix_fmt,
 437                 int width, int height);
 438
 439 /* deinterlace a picture */
 440 int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
 441                           int pix_fmt, int width, int height);
 442
 443 /* external high level API */
 444
 445 extern AVCodec *first_avcodec;
 446
 447 /* returns LIBAVCODEC_VERSION_INT constant */
 448 unsigned avcodec_version(void);
 449 /* returns LIBAVCODEC_BUILD constant */
 450 unsigned avcodec_build(void);
 451 void avcodec_init(void);
 452
 453 void avcodec_set_bit_exact(void);
 454
 455 void register_avcodec(AVCodec *format);
 456 AVCodec *avcodec_find_encoder(enum CodecID id);
 457 AVCodec *avcodec_find_encoder_by_name(const char *name);
 458 AVCodec *avcodec_find_decoder(enum CodecID id);
 459 AVCodec *avcodec_find_decoder_by_name(const char *name);
 460 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
 461
 462 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
 463 int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
 464                          int *frame_size_ptr,
 465                          UINT8 *buf, int buf_size);
 466 int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
 467                          int *got_picture_ptr,
 468                          UINT8 *buf, int buf_size);
 469 int avcodec_parse_frame(AVCodecContext *avctx, UINT8 **pdata,
 470                         int *data_size_ptr,
 471                         UINT8 *buf, int buf_size);
 472 int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
 473                          const short *samples);
 474 int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
 475                          const AVPicture *pict);
 476
 477 int avcodec_close(AVCodecContext *avctx);
 478
 479 void avcodec_register_all(void);
 480
 481 void avcodec_flush_buffers(AVCodecContext *avctx);
 482
 483 #ifdef FF_POSTPROCESS
 484 extern int quant_store[MBR+1][MBC+1]; // [Review]
 485 #endif
 486
 487
 488 /**
 489  * Interface for 0.5.0 version
 490  *
 491  * do not even think about it's usage for this moment
 492  */
 493
 494 typedef struct {
 495     // compressed size used from given memory buffer
 496     int size;
 497     /// I/P/B frame type
 498     int frame_type;
 499 } avc_enc_result_t;
 500
 501 /**
 502  * Commands
 503  * order can't be changed - once it was defined
 504  */
 505 typedef enum {
 506     // general commands
 507     AVC_OPEN_BY_NAME = 0xACA000,
 508     AVC_OPEN_BY_CODEC_ID,
 509     AVC_OPEN_BY_FOURCC,
 510     AVC_CLOSE,
 511
 512     AVC_FLUSH,
 513     // pin - struct { uint8_t* src, uint_t src_size }
 514     // pout - struct { AVPicture* img, consumed_bytes,
 515     AVC_DECODE,
 516     // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
 517     // pout - uint_t used_from_dest_size
 518     AVC_ENCODE,
 519
 520     // query/get video commands
 521     AVC_GET_VERSION = 0xACB000,
 522     AVC_GET_WIDTH,
 523     AVC_GET_HEIGHT,
 524     AVC_GET_DELAY,
 525     AVC_GET_QUANT_TABLE,
 526     // ...
 527
 528     // query/get audio commands
 529     AVC_GET_FRAME_SIZE = 0xABC000,
 530
 531     // maybe define some simple structure which
 532     // might be passed to the user - but they can't
 533     // contain any codec specific parts and these
 534     // calls are usualy necessary only few times
 535
 536     // set video commands
 537     AVC_SET_WIDTH = 0xACD000,
 538     AVC_SET_HEIGHT,
 539
 540     // set video encoding commands
 541     AVC_SET_FRAME_RATE = 0xACD800,
 542     AVC_SET_QUALITY,
 543     AVC_SET_HURRY_UP,
 544
 545     // set audio commands
 546     AVC_SET_SAMPLE_RATE = 0xACE000,
 547     AVC_SET_CHANNELS,
 548
 549 } avc_cmd_t;
 550
 551 /**
 552  * \param handle  allocated private structure by libavcodec
 553  *                for initialization pass NULL - will be returned pout
 554  *                user is supposed to know nothing about its structure
 555  * \param cmd     type of operation to be performed
 556  * \param pint    input parameter
 557  * \param pout    output parameter
 558  *
 559  * \returns  command status - eventually for query command it might return
 560  * integer resulting value
 561  */
 562 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
 563
 564 /* memory */
 565 void *av_malloc(int size);
 566 void *av_mallocz(int size);
 567 void av_free(void *ptr);
 568 void __av_freep(void **ptr);
 569 #define av_freep(p) __av_freep((void **)(p))
 570
 571 #endif /* AVCODEC_H */