libavcodec/avcodec.h

   1 #ifndef AVCODEC_H
   2 #define AVCODEC_H
   3
   4 #include "common.h"
   5
   6 enum CodecID {
   7     CODEC_ID_NONE,
   8     CODEC_ID_MPEG1VIDEO,
   9     CODEC_ID_H263,
  10     CODEC_ID_RV10,
  11     CODEC_ID_MP2,
  12     CODEC_ID_MP3LAME,
  13     CODEC_ID_AC3,
  14     CODEC_ID_MJPEG,
  15     CODEC_ID_MPEG4,
  16     CODEC_ID_RAWVIDEO,
  17     CODEC_ID_MSMPEG4V1,
  18     CODEC_ID_MSMPEG4V2,
  19     CODEC_ID_MSMPEG4V3,
  20     CODEC_ID_WMV1,
  21     CODEC_ID_H263P,
  22     CODEC_ID_H263I,
  23
  24     /* various pcm "codecs" */
  25     CODEC_ID_PCM_S16LE,
  26     CODEC_ID_PCM_S16BE,
  27     CODEC_ID_PCM_U16LE,
  28     CODEC_ID_PCM_U16BE,
  29     CODEC_ID_PCM_S8,
  30     CODEC_ID_PCM_U8,
  31     CODEC_ID_PCM_MULAW,
  32     CODEC_ID_PCM_ALAW,
  33 };
  34 #define CODEC_ID_MSMPEG4 CODEC_ID_MSMPEG4V3
  35
  36 enum CodecType {
  37     CODEC_TYPE_VIDEO,
  38     CODEC_TYPE_AUDIO,
  39 };
  40
  41 enum PixelFormat {
  42     PIX_FMT_ANY = -1,
  43     PIX_FMT_YUV420P,
  44     PIX_FMT_YUV422,
  45     PIX_FMT_RGB24,
  46     PIX_FMT_BGR24,
  47     PIX_FMT_YUV422P,
  48     PIX_FMT_YUV444P,
  49 };
  50
  51 /* currently unused, may be used if 24/32 bits samples ever supported */
  52 enum SampleFormat {
  53     SAMPLE_FMT_S16 = 0,         /* signed 16 bits */
  54 };
  55
  56 /* in bytes */
  57 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 18432
  58
  59 /* motion estimation type, EPZS by default */
  60 enum Motion_Est_ID {
  61     ME_ZERO = 1,
  62     ME_FULL,
  63     ME_LOG,
  64     ME_PHODS,
  65     ME_EPZS,
  66     ME_X1
  67 };
  68
  69 /* only for ME compatiblity with old apps */
  70 extern int motion_estimation_method;
  71
  72 /* ME algos sorted by quality */
  73 static const int Motion_Est_QTab[] = { -4, -1, -2, 1, 0, -3 };
  74
  75 /* encoding support */
  76 /* note not everything is supported yet */
  77
  78 #define CODEC_FLAG_HQ     0x0001 /* high quality (non real time) encoding */
  79 #define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
  80 #define CODEC_FLAG_4MV    0x0004 /* 4 MV per MB allowed */
  81 #define CODEC_FLAG_B      0x0008 /* use B frames */
  82 #define CODEC_FLAG_QPEL   0x0010 /* use qpel MC */
  83 #define CODEC_FLAG_GMC    0x0020 /* use GMC */
  84 #define CODEC_FLAG_TYPE   0x0040 /* fixed I/P frame type, from avctx->key_frame */
  85
  86 /* codec capabilities */
  87
  88 /* decoder can use draw_horiz_band callback */
  89 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001
  90
  91 #define FRAME_RATE_BASE 10000
  92
  93 typedef struct AVCodecContext {
  94     int bit_rate;
  95     int bit_rate_tolerance; /* amount of +- bits (>0)*/
  96     int flags;
  97     int sub_id;    /* some codecs needs additionnal format info. It is
  98                       stored there */
  99
 100     int me_method; /* ME algorithm used for video coding */
 101
 102     /* video only */
 103     int frame_rate; /* frames per sec multiplied by FRAME_RATE_BASE */
 104     int width, height;
 105     int aspect_ratio_info;
 106 #define FF_ASPECT_SQUARE 1
 107 #define FF_ASPECT_4_3_625 2
 108 #define FF_ASPECT_4_3_525 3
 109 #define FF_ASPECT_16_9_625 4
 110 #define FF_ASPECT_16_9_525 5
 111     int gop_size; /* 0 = intra only */
 112     enum PixelFormat pix_fmt;  /* pixel format, see PIX_FMT_xxx */
 113
 114     /* if non NULL, 'draw_horiz_band' is called by the libavcodec
 115        decoder to draw an horizontal band. It improve cache usage. Not
 116        all codecs can do that. You must check the codec capabilities
 117        before */
 118     void (*draw_horiz_band)(struct AVCodecContext *s,
 119                             UINT8 **src_ptr, int linesize,
 120                             int y, int width, int height);
 121
 122     /* audio only */
 123     int sample_rate; /* samples per sec */
 124     int channels;
 125     int sample_fmt;  /* sample format, currenly unused */
 126
 127     /* the following data should not be initialized */
 128     int frame_size; /* in samples, initialized when calling 'init' */
 129     int frame_number; /* audio or video frame number */
 130     int key_frame;    /* true if the previous compressed frame was
 131                          a key frame (intra, or seekable) */
 132     int quality;      /* quality of the previous encoded frame
 133                          (between 1 (good) and 31 (bad)) */
 134     float qcompress;  /* amount of qscale change between easy & hard scenes (0.0-1.0)*/
 135     float qblur;      /* amount of qscale smoothing over time (0.0-1.0) */
 136     int qmin;         /* min qscale */
 137     int qmax;         /* max qscale */
 138     int max_qdiff;    /* max qscale difference between frames */
 139
 140     struct AVCodec *codec;
 141     void *priv_data;
 142
 143     /* The following data is for RTP friendly coding */
 144     /* By now only H.263/H.263+ coder honours this   */
 145     int rtp_mode;   /* 1 for activate RTP friendly-mode           */
 146                     /* highers numbers represent more error-prone */
 147                     /* enviroments, by now just "1" exist         */
 148
 149     int rtp_payload_size;   /* The size of the RTP payload, the coder will  */
 150                             /* do it's best to deliver a chunk with size    */
 151                             /* below rtp_payload_size, the chunk will start */
 152                             /* with a start code on some codecs like H.263  */
 153                             /* This doesn't take account of any particular  */
 154                             /* headers inside the transmited RTP payload    */
 155
 156
 157     /* The RTP callcack: This function is called  */
 158     /* every time the encoder as a packet to send */
 159     /* Depends on the encoder if the data starts  */
 160     /* with a Start Code (it should) H.263 does   */
 161     void (*rtp_callback)(void *data, int size, int packet_number);
 162
 163     /* These are for PSNR calculation, if you set get_psnr to 1 */
 164     /* after encoding you will have the PSNR on psnr_y/cb/cr    */
 165     int get_psnr;
 166     float psnr_y;
 167     float psnr_cb;
 168     float psnr_cr;
 169
 170     /* statistics, used for 2-pass encoding */
 171     int mv_bits;
 172     int header_bits;
 173     int i_tex_bits;
 174     int p_tex_bits;
 175     int i_count;
 176     int p_count;
 177     int skip_count;
 178     int misc_bits; // cbp, mb_type
 179     int frame_bits;
 180
 181     /* the following fields are ignored */
 182     void *opaque;   /* can be used to carry app specific stuff */
 183     char codec_name[32];
 184     int codec_type; /* see CODEC_TYPE_xxx */
 185     int codec_id; /* see CODEC_ID_xxx */
 186     unsigned int codec_tag;  /* codec tag, only used if unknown codec */
 187 } AVCodecContext;
 188
 189 typedef struct AVCodec {
 190     char *name;
 191     int type;
 192     int id;
 193     int priv_data_size;
 194     int (*init)(AVCodecContext *);
 195     int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
 196     int (*close)(AVCodecContext *);
 197     int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
 198                   UINT8 *buf, int buf_size);
 199     int capabilities;
 200     struct AVCodec *next;
 201 } AVCodec;
 202
 203 /* three components are given, that's all */
 204 typedef struct AVPicture {
 205     UINT8 *data[3];
 206     int linesize[3];
 207 } AVPicture;
 208
 209 extern AVCodec ac3_encoder;
 210 extern AVCodec mp2_encoder;
 211 extern AVCodec mp3lame_encoder;
 212 extern AVCodec mpeg1video_encoder;
 213 extern AVCodec h263_encoder;
 214 extern AVCodec h263p_encoder;
 215 extern AVCodec rv10_encoder;
 216 extern AVCodec mjpeg_encoder;
 217 extern AVCodec mpeg4_encoder;
 218 extern AVCodec msmpeg4v1_encoder;
 219 extern AVCodec msmpeg4v2_encoder;
 220 extern AVCodec msmpeg4v3_encoder;
 221
 222 extern AVCodec h263_decoder;
 223 extern AVCodec mpeg4_decoder;
 224 extern AVCodec msmpeg4v1_decoder;
 225 extern AVCodec msmpeg4v2_decoder;
 226 extern AVCodec msmpeg4v3_decoder;
 227 extern AVCodec wmv1_decoder;
 228 extern AVCodec mpeg_decoder;
 229 extern AVCodec h263i_decoder;
 230 extern AVCodec rv10_decoder;
 231 extern AVCodec mjpeg_decoder;
 232 extern AVCodec mp3_decoder;
 233
 234 /* pcm codecs */
 235 #define PCM_CODEC(id, name) \
 236 extern AVCodec name ## _decoder; \
 237 extern AVCodec name ## _encoder;
 238
 239 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
 240 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
 241 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
 242 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
 243 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
 244 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
 245 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
 246 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
 247
 248 #undef PCM_CODEC
 249
 250 /* dummy raw video codec */
 251 extern AVCodec rawvideo_codec;
 252
 253 /* the following codecs use external GPL libs */
 254 extern AVCodec ac3_decoder;
 255
 256 /* resample.c */
 257
 258 struct ReSampleContext;
 259
 260 typedef struct ReSampleContext ReSampleContext;
 261
 262 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
 263                                      int output_rate, int input_rate);
 264 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
 265 void audio_resample_close(ReSampleContext *s);
 266
 267 /* YUV420 format is assumed ! */
 268
 269 struct ImgReSampleContext;
 270
 271 typedef struct ImgReSampleContext ImgReSampleContext;
 272
 273 ImgReSampleContext *img_resample_init(int output_width, int output_height,
 274                                       int input_width, int input_height);
 275 void img_resample(ImgReSampleContext *s,
 276                   AVPicture *output, AVPicture *input);
 277
 278 void img_resample_close(ImgReSampleContext *s);
 279
 280 void avpicture_fill(AVPicture *picture, UINT8 *ptr,
 281                     int pix_fmt, int width, int height);
 282 int avpicture_get_size(int pix_fmt, int width, int height);
 283
 284 /* convert among pixel formats */
 285 int img_convert(AVPicture *dst, int dst_pix_fmt,
 286                 AVPicture *src, int pix_fmt,
 287                 int width, int height);
 288
 289 /* deinterlace a picture */
 290 int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
 291                           int pix_fmt, int width, int height);
 292
 293 /* external high level API */
 294
 295 extern AVCodec *first_avcodec;
 296
 297 void avcodec_init(void);
 298
 299 void register_avcodec(AVCodec *format);
 300 AVCodec *avcodec_find_encoder(enum CodecID id);
 301 AVCodec *avcodec_find_encoder_by_name(const char *name);
 302 AVCodec *avcodec_find_decoder(enum CodecID id);
 303 AVCodec *avcodec_find_decoder_by_name(const char *name);
 304 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
 305
 306 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
 307 int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
 308                          int *frame_size_ptr,
 309                          UINT8 *buf, int buf_size);
 310 int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
 311                          int *got_picture_ptr,
 312                          UINT8 *buf, int buf_size);
 313 int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
 314                          const short *samples);
 315 int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
 316                          const AVPicture *pict);
 317
 318 int avcodec_close(AVCodecContext *avctx);
 319
 320 void avcodec_register_all(void);
 321
 322 #ifdef FF_POSTPROCESS
 323 #ifndef MBC
 324 #define MBC 48
 325 #define MBR 36
 326 #endif
 327 extern int quant_store[MBR+1][MBC+1]; // [Review]
 328 #endif
 329
 330 #endif /* AVCODEC_H */