Statistics
| Branch: | Revision:

ffmpeg / libavcodec / avcodec.h @ 57514323

History | View | Annotate | Download (11.2 KB)

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       4602
9
#define LIBAVCODEC_BUILD_STR   "4602"
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_H263P,
27
    CODEC_ID_H263I,
28

    
29
    /* various pcm "codecs" */
30
    CODEC_ID_PCM_S16LE,
31
    CODEC_ID_PCM_S16BE,
32
    CODEC_ID_PCM_U16LE,
33
    CODEC_ID_PCM_U16BE,
34
    CODEC_ID_PCM_S8,
35
    CODEC_ID_PCM_U8,
36
    CODEC_ID_PCM_MULAW,
37
    CODEC_ID_PCM_ALAW,
38
};
39
#define CODEC_ID_MSMPEG4 CODEC_ID_MSMPEG4V3
40

    
41
enum CodecType {
42
    CODEC_TYPE_VIDEO,
43
    CODEC_TYPE_AUDIO,
44
};
45

    
46
enum PixelFormat {
47
    PIX_FMT_ANY = -1,
48
    PIX_FMT_YUV420P,
49
    PIX_FMT_YUV422,
50
    PIX_FMT_RGB24,
51
    PIX_FMT_BGR24,
52
    PIX_FMT_YUV422P,
53
    PIX_FMT_YUV444P,
54
};
55

    
56
/* currently unused, may be used if 24/32 bits samples ever supported */
57
enum SampleFormat {
58
    SAMPLE_FMT_S16 = 0,         /* signed 16 bits */
59
};
60

    
61
/* in bytes */
62
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 18432
63

    
64
/* motion estimation type, EPZS by default */
65
enum Motion_Est_ID {
66
    ME_ZERO = 1,
67
    ME_FULL,
68
    ME_LOG,
69
    ME_PHODS,
70
    ME_EPZS,
71
    ME_X1
72
};
73

    
74
/* only for ME compatiblity with old apps */
75
extern int motion_estimation_method;
76

    
77
/* ME algos sorted by quality */
78
static const int Motion_Est_QTab[] = { 1, 4, 3, 6, 5, 2 };
79

    
80
#define FF_MAX_B_FRAMES 4
81

    
82
/* encoding support */
83
/* note not everything is supported yet */
84

    
85
#define CODEC_FLAG_HQ     0x0001 /* high quality (non real time) encoding */
86
#define CODEC_FLAG_QSCALE 0x0002 /* use fixed qscale */
87
#define CODEC_FLAG_4MV    0x0004 /* 4 MV per MB allowed */
88
#define CODEC_FLAG_QPEL   0x0010 /* use qpel MC */
89
#define CODEC_FLAG_GMC    0x0020 /* use GMC */
90
#define CODEC_FLAG_TYPE   0x0040 /* fixed I/P frame type, from avctx->key_frame */
91
/* parent program gurantees that the input for b-frame containing streams is not written to 
92
   for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
93
#define CODEC_FLAG_INPUT_PRESERVED 0x0100
94
#define CODEC_FLAG_PASS1 0x0200  /* use internal 2pass ratecontrol in first  pass mode */
95
#define CODEC_FLAG_PASS2 0x0400  /* use internal 2pass ratecontrol in second pass mode */
96

    
97
/* codec capabilities */
98

    
99
/* decoder can use draw_horiz_band callback */
100
#define CODEC_CAP_DRAW_HORIZ_BAND 0x0001
101

    
102
#define FRAME_RATE_BASE 10000
103

    
104
typedef struct AVCodecContext {
105
    int bit_rate;
106
    int bit_rate_tolerance; /* amount of +- bits (>0)*/
107
    int flags;
108
    int sub_id;    /* some codecs needs additionnal format info. It is
109
                      stored there */
110
    
111
    int me_method; /* ME algorithm used for video coding */
112
    
113
    /* video only */
114
    int frame_rate; /* frames per sec multiplied by FRAME_RATE_BASE */
115
    int width, height;
116
    int aspect_ratio_info;
117
#define FF_ASPECT_SQUARE 1
118
#define FF_ASPECT_4_3_625 2
119
#define FF_ASPECT_4_3_525 3
120
#define FF_ASPECT_16_9_625 4
121
#define FF_ASPECT_16_9_525 5
122
    int gop_size; /* 0 = intra only */
123
    enum PixelFormat pix_fmt;  /* pixel format, see PIX_FMT_xxx */
124

    
125
    /* if non NULL, 'draw_horiz_band' is called by the libavcodec
126
       decoder to draw an horizontal band. It improve cache usage. Not
127
       all codecs can do that. You must check the codec capabilities
128
       before */
129
    void (*draw_horiz_band)(struct AVCodecContext *s,
130
                            UINT8 **src_ptr, int linesize,
131
                            int y, int width, int height);
132

    
133
    /* audio only */
134
    int sample_rate; /* samples per sec */
135
    int channels;
136
    int sample_fmt;  /* sample format, currenly unused */
137

    
138
    /* the following data should not be initialized */
139
    int frame_size; /* in samples, initialized when calling 'init' */
140
    int frame_number; /* audio or video frame number */
141
    int key_frame;    /* true if the previous compressed frame was 
142
                         a key frame (intra, or seekable) */
143
    int delay;        /* number of frames the decoded output will be delayed relative to the encoded input */
144
    
145
    /* encoding parameters */
146
    int quality;      /* quality of the previous encoded frame 
147
                         (between 1 (good) and 31 (bad)) 
148
                         this is allso used to set the quality in vbr mode
149
                         and the per frame quality in CODEC_FLAG_TYPE (second pass mode) */
150
    float qcompress;  /* amount of qscale change between easy & hard scenes (0.0-1.0)*/
151
    float qblur;      /* amount of qscale smoothing over time (0.0-1.0) */
152
    int qmin;         /* min qscale */
153
    int qmax;         /* max qscale */
154
    int max_qdiff;    /* max qscale difference between frames */
155
    int max_b_frames; /* maximum b frames, the output will be delayed by max_b_frames+1 relative to the input */
156
    float b_quant_factor;/* qscale factor between ips and b frames */
157
    int rc_strategy;
158
    int b_frame_strategy;
159

    
160
    struct AVCodec *codec;
161
    void *priv_data;
162

    
163
    /* The following data is for RTP friendly coding */
164
    /* By now only H.263/H.263+ coder honours this   */
165
    int rtp_mode;   /* 1 for activate RTP friendly-mode           */
166
                    /* highers numbers represent more error-prone */
167
                    /* enviroments, by now just "1" exist         */
168
    
169
    int rtp_payload_size;   /* The size of the RTP payload, the coder will  */
170
                            /* do it's best to deliver a chunk with size    */
171
                            /* below rtp_payload_size, the chunk will start */
172
                            /* with a start code on some codecs like H.263  */
173
                            /* This doesn't take account of any particular  */
174
                            /* headers inside the transmited RTP payload    */
175

    
176
    
177
    /* The RTP callcack: This function is called  */
178
    /* every time the encoder as a packet to send */
179
    /* Depends on the encoder if the data starts  */
180
    /* with a Start Code (it should) H.263 does   */
181
    void (*rtp_callback)(void *data, int size, int packet_number); 
182

    
183
    /* These are for PSNR calculation, if you set get_psnr to 1 */
184
    /* after encoding you will have the PSNR on psnr_y/cb/cr    */
185
    int get_psnr;
186
    float psnr_y;
187
    float psnr_cb;
188
    float psnr_cr;
189
    
190
    /* statistics, used for 2-pass encoding */
191
    int mv_bits;
192
    int header_bits;
193
    int i_tex_bits;
194
    int p_tex_bits;
195
    int i_count;
196
    int p_count;
197
    int skip_count;
198
    int misc_bits; // cbp, mb_type
199
    int frame_bits;
200
                 
201
    /* the following fields are ignored */
202
    void *opaque;   /* can be used to carry app specific stuff */
203
    char codec_name[32];
204
    int codec_type; /* see CODEC_TYPE_xxx */
205
    int codec_id; /* see CODEC_ID_xxx */
206
    unsigned int codec_tag;  /* codec tag, only used if unknown codec */
207
} AVCodecContext;
208

    
209
typedef struct AVCodec {
210
    char *name;
211
    int type;
212
    int id;
213
    int priv_data_size;
214
    int (*init)(AVCodecContext *);
215
    int (*encode)(AVCodecContext *, UINT8 *buf, int buf_size, void *data);
216
    int (*close)(AVCodecContext *);
217
    int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, 
218
                  UINT8 *buf, int buf_size);
219
    int capabilities;
220
    struct AVCodec *next;
221
} AVCodec;
222

    
223
/* three components are given, that's all */
224
typedef struct AVPicture {
225
    UINT8 *data[3];
226
    int linesize[3];
227
} AVPicture;
228

    
229
extern AVCodec ac3_encoder;
230
extern AVCodec mp2_encoder;
231
extern AVCodec mp3lame_encoder;
232
extern AVCodec mpeg1video_encoder;
233
extern AVCodec h263_encoder;
234
extern AVCodec h263p_encoder;
235
extern AVCodec rv10_encoder;
236
extern AVCodec mjpeg_encoder;
237
extern AVCodec mpeg4_encoder;
238
extern AVCodec msmpeg4v1_encoder;
239
extern AVCodec msmpeg4v2_encoder;
240
extern AVCodec msmpeg4v3_encoder;
241

    
242
extern AVCodec h263_decoder;
243
extern AVCodec mpeg4_decoder;
244
extern AVCodec msmpeg4v1_decoder;
245
extern AVCodec msmpeg4v2_decoder;
246
extern AVCodec msmpeg4v3_decoder;
247
extern AVCodec wmv1_decoder;
248
extern AVCodec mpeg_decoder;
249
extern AVCodec h263i_decoder;
250
extern AVCodec rv10_decoder;
251
extern AVCodec mjpeg_decoder;
252
extern AVCodec mp2_decoder;
253
extern AVCodec mp3_decoder;
254

    
255
/* pcm codecs */
256
#define PCM_CODEC(id, name) \
257
extern AVCodec name ## _decoder; \
258
extern AVCodec name ## _encoder;
259

    
260
PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
261
PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
262
PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
263
PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
264
PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
265
PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
266
PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
267
PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
268

    
269
#undef PCM_CODEC
270

    
271
/* dummy raw video codec */
272
extern AVCodec rawvideo_codec;
273

    
274
/* the following codecs use external GPL libs */
275
extern AVCodec ac3_decoder;
276

    
277
/* resample.c */
278

    
279
struct ReSampleContext;
280

    
281
typedef struct ReSampleContext ReSampleContext;
282

    
283
ReSampleContext *audio_resample_init(int output_channels, int input_channels, 
284
                                     int output_rate, int input_rate);
285
int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
286
void audio_resample_close(ReSampleContext *s);
287

    
288
/* YUV420 format is assumed ! */
289

    
290
struct ImgReSampleContext;
291

    
292
typedef struct ImgReSampleContext ImgReSampleContext;
293

    
294
ImgReSampleContext *img_resample_init(int output_width, int output_height,
295
                                      int input_width, int input_height);
296
void img_resample(ImgReSampleContext *s, 
297
                  AVPicture *output, AVPicture *input);
298

    
299
void img_resample_close(ImgReSampleContext *s);
300

    
301
void avpicture_fill(AVPicture *picture, UINT8 *ptr,
302
                    int pix_fmt, int width, int height);
303
int avpicture_get_size(int pix_fmt, int width, int height);
304

    
305
/* convert among pixel formats */
306
int img_convert(AVPicture *dst, int dst_pix_fmt,
307
                AVPicture *src, int pix_fmt, 
308
                int width, int height);
309

    
310
/* deinterlace a picture */
311
int avpicture_deinterlace(AVPicture *dst, AVPicture *src,
312
                          int pix_fmt, int width, int height);
313

    
314
/* external high level API */
315

    
316
extern AVCodec *first_avcodec;
317

    
318
void avcodec_init(void);
319

    
320
void register_avcodec(AVCodec *format);
321
AVCodec *avcodec_find_encoder(enum CodecID id);
322
AVCodec *avcodec_find_encoder_by_name(const char *name);
323
AVCodec *avcodec_find_decoder(enum CodecID id);
324
AVCodec *avcodec_find_decoder_by_name(const char *name);
325
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
326

    
327
int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
328
int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples, 
329
                         int *frame_size_ptr,
330
                         UINT8 *buf, int buf_size);
331
int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture, 
332
                         int *got_picture_ptr,
333
                         UINT8 *buf, int buf_size);
334
int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size, 
335
                         const short *samples);
336
int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size, 
337
                         const AVPicture *pict);
338

    
339
int avcodec_close(AVCodecContext *avctx);
340

    
341
void avcodec_register_all(void);
342

    
343
#ifdef FF_POSTPROCESS
344
#ifndef MBC
345
#define MBC 128
346
#define MBR 96
347
#endif
348
extern int quant_store[MBR+1][MBC+1]; // [Review]
349
#endif
350

    
351
#endif /* AVCODEC_H */