Creative ADPCM decoder, format 0x200, courtesy of Konstantin Shishkov
[libav.git] / 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 #include "rational.h"
16 #include <sys/types.h> /* size_t */
17
18 #define FFMPEG_VERSION_INT 0x000409
19 #define FFMPEG_VERSION "0.4.9-pre1"
20 #define LIBAVCODEC_BUILD 4725
21
22 #define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
23 #define LIBAVCODEC_VERSION FFMPEG_VERSION
24
25 #define AV_STRINGIFY(s) AV_TOSTRING(s)
26 #define AV_TOSTRING(s) #s
27 #define LIBAVCODEC_IDENT "FFmpeg" LIBAVCODEC_VERSION "b" AV_STRINGIFY(LIBAVCODEC_BUILD)
28
29 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
30 #define AV_TIME_BASE 1000000
31
32 enum CodecID {
33 CODEC_ID_NONE,
34 CODEC_ID_MPEG1VIDEO,
35 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
36 CODEC_ID_MPEG2VIDEO_XVMC,
37 CODEC_ID_H261,
38 CODEC_ID_H263,
39 CODEC_ID_RV10,
40 CODEC_ID_RV20,
41 CODEC_ID_MP2,
42 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
43 CODEC_ID_VORBIS,
44 CODEC_ID_AC3,
45 CODEC_ID_MJPEG,
46 CODEC_ID_MJPEGB,
47 CODEC_ID_LJPEG,
48 CODEC_ID_SP5X,
49 CODEC_ID_MPEG4,
50 CODEC_ID_RAWVIDEO,
51 CODEC_ID_MSMPEG4V1,
52 CODEC_ID_MSMPEG4V2,
53 CODEC_ID_MSMPEG4V3,
54 CODEC_ID_WMV1,
55 CODEC_ID_WMV2,
56 CODEC_ID_H263P,
57 CODEC_ID_H263I,
58 CODEC_ID_FLV1,
59 CODEC_ID_SVQ1,
60 CODEC_ID_SVQ3,
61 CODEC_ID_DVVIDEO,
62 CODEC_ID_DVAUDIO,
63 CODEC_ID_WMAV1,
64 CODEC_ID_WMAV2,
65 CODEC_ID_MACE3,
66 CODEC_ID_MACE6,
67 CODEC_ID_HUFFYUV,
68 CODEC_ID_CYUV,
69 CODEC_ID_H264,
70 CODEC_ID_INDEO3,
71 CODEC_ID_VP3,
72 CODEC_ID_THEORA,
73 CODEC_ID_AAC,
74 CODEC_ID_MPEG4AAC,
75 CODEC_ID_ASV1,
76 CODEC_ID_ASV2,
77 CODEC_ID_FFV1,
78 CODEC_ID_4XM,
79 CODEC_ID_VCR1,
80 CODEC_ID_CLJR,
81 CODEC_ID_MDEC,
82 CODEC_ID_ROQ,
83 CODEC_ID_INTERPLAY_VIDEO,
84 CODEC_ID_XAN_WC3,
85 CODEC_ID_XAN_WC4,
86 CODEC_ID_RPZA,
87 CODEC_ID_CINEPAK,
88 CODEC_ID_WS_VQA,
89 CODEC_ID_MSRLE,
90 CODEC_ID_MSVIDEO1,
91 CODEC_ID_IDCIN,
92 CODEC_ID_8BPS,
93 CODEC_ID_SMC,
94 CODEC_ID_FLIC,
95 CODEC_ID_TRUEMOTION1,
96 CODEC_ID_VMDVIDEO,
97 CODEC_ID_VMDAUDIO,
98 CODEC_ID_MSZH,
99 CODEC_ID_ZLIB,
100 CODEC_ID_SONIC,
101 CODEC_ID_SONIC_LS,
102 CODEC_ID_QTRLE,
103 CODEC_ID_SNOW,
104 CODEC_ID_TSCC,
105 CODEC_ID_ULTI,
106 CODEC_ID_QDRAW,
107
108 /* various pcm "codecs" */
109 CODEC_ID_PCM_S16LE,
110 CODEC_ID_PCM_S16BE,
111 CODEC_ID_PCM_U16LE,
112 CODEC_ID_PCM_U16BE,
113 CODEC_ID_PCM_S8,
114 CODEC_ID_PCM_U8,
115 CODEC_ID_PCM_MULAW,
116 CODEC_ID_PCM_ALAW,
117
118 /* various adpcm codecs */
119 CODEC_ID_ADPCM_IMA_QT,
120 CODEC_ID_ADPCM_IMA_WAV,
121 CODEC_ID_ADPCM_IMA_DK3,
122 CODEC_ID_ADPCM_IMA_DK4,
123 CODEC_ID_ADPCM_IMA_WS,
124 CODEC_ID_ADPCM_IMA_SMJPEG,
125 CODEC_ID_ADPCM_MS,
126 CODEC_ID_ADPCM_4XM,
127 CODEC_ID_ADPCM_XA,
128 CODEC_ID_ADPCM_ADX,
129 CODEC_ID_ADPCM_EA,
130 CODEC_ID_ADPCM_G726,
131 CODEC_ID_ADPCM_CT,
132
133 /* AMR */
134 CODEC_ID_AMR_NB,
135 CODEC_ID_AMR_WB,
136
137 /* RealAudio codecs*/
138 CODEC_ID_RA_144,
139 CODEC_ID_RA_288,
140
141 /* various DPCM codecs */
142 CODEC_ID_ROQ_DPCM,
143 CODEC_ID_INTERPLAY_DPCM,
144 CODEC_ID_XAN_DPCM,
145 CODEC_ID_SOL_DPCM,
146
147 CODEC_ID_FLAC,
148
149 CODEC_ID_MPEG2TS, /* _FAKE_ codec to indicate a raw MPEG2 transport
150 stream (only used by libavformat) */
151
152 CODEC_ID_DTS,
153 CODEC_ID_XVID,
154 };
155
156 /* CODEC_ID_MP3LAME is absolete */
157 #define CODEC_ID_MP3LAME CODEC_ID_MP3
158
159 enum CodecType {
160 CODEC_TYPE_UNKNOWN = -1,
161 CODEC_TYPE_VIDEO,
162 CODEC_TYPE_AUDIO,
163 CODEC_TYPE_DATA,
164 };
165
166 /**
167 * Pixel format. Notes:
168 *
169 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
170 * color is put together as:
171 * (A << 24) | (R << 16) | (G << 8) | B
172 * This is stored as BGRA on little endian CPU architectures and ARGB on
173 * big endian CPUs.
174 *
175 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
176 * image data is stored in AVFrame.data[0]. The palette is transported in
177 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
178 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
179 * also endian-specific). Note also that the individual RGB palette
180 * components stored in AVFrame.data[1] should be in the range 0..255.
181 * This is important as many custom PAL8 video codecs that were designed
182 * to run on the IBM VGA graphics adapter use 6-bit palette components.
183 */
184 enum PixelFormat {
185 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
186 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
187 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
188 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
189 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
190 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
191 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
192 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
193 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
194 PIX_FMT_RGB565, ///< always stored in cpu endianness
195 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
196 PIX_FMT_GRAY8,
197 PIX_FMT_MONOWHITE, ///< 0 is white
198 PIX_FMT_MONOBLACK, ///< 0 is black
199 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
200 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
201 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
202 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
203 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
204 PIX_FMT_XVMC_MPEG2_IDCT,
205 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
206 PIX_FMT_NB,
207 };
208
209 /* currently unused, may be used if 24/32 bits samples ever supported */
210 enum SampleFormat {
211 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
212 };
213
214 /* in bytes */
215 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
216
217 /**
218 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
219 * this is mainly needed because some optimized bitstream readers read
220 * 32 or 64 bit at once and could read over the end<br>
221 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
222 * MPEG bitstreams could cause overread and segfault
223 */
224 #define FF_INPUT_BUFFER_PADDING_SIZE 8
225
226 /* motion estimation type, EPZS by default */
227 enum Motion_Est_ID {
228 ME_ZERO = 1,
229 ME_FULL,
230 ME_LOG,
231 ME_PHODS,
232 ME_EPZS,
233 ME_X1
234 };
235
236 enum AVRounding {
237 AV_ROUND_ZERO = 0, ///< round toward zero
238 AV_ROUND_INF = 1, ///< round away from zero
239 AV_ROUND_DOWN = 2, ///< round toward -infinity
240 AV_ROUND_UP = 3, ///< round toward +infinity
241 AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
242 };
243
244 typedef struct RcOverride{
245 int start_frame;
246 int end_frame;
247 int qscale; // if this is 0 then quality_factor will be used instead
248 float quality_factor;
249 } RcOverride;
250
251 /* only for ME compatiblity with old apps */
252 extern int motion_estimation_method;
253
254 #define FF_MAX_B_FRAMES 8
255
256 /* encoding support
257 these flags can be passed in AVCodecContext.flags before initing
258 Note: note not everything is supported yet
259 */
260
261 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
262 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
263 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
264 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
265 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
266 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
267 /* parent program gurantees that the input for b-frame containing streams is not written to
268 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
269 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
270 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
271 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
272 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
273 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
274 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
275 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
276 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
277 of only at frame boundaries */
278 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
279 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
280 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
281 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
282 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
283 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
284 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
285 /* Fx : Flag for h263+ extra options */
286 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
287 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
288 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
289 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
290 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
291 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
292 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
293 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
294 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
295 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
296 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
297 #define CODEC_FLAG_CLOSED_GOP 0x80000000
298 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
299
300 /* Unsupported options :
301 * Syntax Arithmetic coding (SAC)
302 * Reference Picture Selection
303 * Independant Segment Decoding */
304 /* /Fx */
305 /* codec capabilities */
306
307 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
308 /**
309 * Codec uses get_buffer() for allocating buffers.
310 * direct rendering method 1
311 */
312 #define CODEC_CAP_DR1 0x0002
313 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
314 used */
315 #define CODEC_CAP_PARSE_ONLY 0x0004
316 #define CODEC_CAP_TRUNCATED 0x0008
317 /* codec can export data for HW decoding (XvMC) */
318 #define CODEC_CAP_HWACCEL 0x0010
319 /** codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data */
320 #define CODEC_CAP_DELAY 0x0020
321
322 //the following defines might change, so dont expect compatibility if u use them
323 #define MB_TYPE_INTRA4x4 0x0001
324 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
325 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
326 #define MB_TYPE_16x16 0x0008
327 #define MB_TYPE_16x8 0x0010
328 #define MB_TYPE_8x16 0x0020
329 #define MB_TYPE_8x8 0x0040
330 #define MB_TYPE_INTERLACED 0x0080
331 #define MB_TYPE_DIRECT2 0x0100 //FIXME
332 #define MB_TYPE_ACPRED 0x0200
333 #define MB_TYPE_GMC 0x0400
334 #define MB_TYPE_SKIP 0x0800
335 #define MB_TYPE_P0L0 0x1000
336 #define MB_TYPE_P1L0 0x2000
337 #define MB_TYPE_P0L1 0x4000
338 #define MB_TYPE_P1L1 0x8000
339 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
340 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
341 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
342 #define MB_TYPE_QUANT 0x00010000
343 #define MB_TYPE_CBP 0x00020000
344 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
345
346 /**
347 * Pan Scan area.
348 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
349 */
350 typedef struct AVPanScan{
351 /**
352 * id.
353 * - encoding: set by user.
354 * - decoding: set by lavc
355 */
356 int id;
357
358 /**
359 * width and height in 1/16 pel
360 * - encoding: set by user.
361 * - decoding: set by lavc
362 */
363 int width;
364 int height;
365
366 /**
367 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
368 * - encoding: set by user.
369 * - decoding: set by lavc
370 */
371 int16_t position[3][2];
372 }AVPanScan;
373
374 #define FF_COMMON_FRAME \
375 /**\
376 * pointer to the picture planes.\
377 * this might be different from the first allocated byte\
378 * - encoding: \
379 * - decoding: \
380 */\
381 uint8_t *data[4];\
382 int linesize[4];\
383 /**\
384 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
385 * this isnt used by lavc unless the default get/release_buffer() is used\
386 * - encoding: \
387 * - decoding: \
388 */\
389 uint8_t *base[4];\
390 /**\
391 * 1 -> keyframe, 0-> not\
392 * - encoding: set by lavc\
393 * - decoding: set by lavc\
394 */\
395 int key_frame;\
396 \
397 /**\
398 * picture type of the frame, see ?_TYPE below.\
399 * - encoding: set by lavc for coded_picture (and set by user for input)\
400 * - decoding: set by lavc\
401 */\
402 int pict_type;\
403 \
404 /**\
405 * presentation timestamp in AV_TIME_BASE (=micro seconds currently) (time when frame should be shown to user)\
406 * if AV_NOPTS_VALUE then the frame_rate will be used as reference\
407 * - encoding: MUST be set by user\
408 * - decoding: set by lavc\
409 */\
410 int64_t pts;\
411 \
412 /**\
413 * picture number in bitstream order.\
414 * - encoding: set by\
415 * - decoding: set by lavc\
416 */\
417 int coded_picture_number;\
418 /**\
419 * picture number in display order.\
420 * - encoding: set by\
421 * - decoding: set by lavc\
422 */\
423 int display_picture_number;\
424 \
425 /**\
426 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
427 * - encoding: set by lavc for coded_picture (and set by user for input)\
428 * - decoding: set by lavc\
429 */\
430 int quality; \
431 \
432 /**\
433 * buffer age (1->was last buffer and dint change, 2->..., ...).\
434 * set to INT_MAX if the buffer has not been used yet \
435 * - encoding: unused\
436 * - decoding: MUST be set by get_buffer()\
437 */\
438 int age;\
439 \
440 /**\
441 * is this picture used as reference\
442 * - encoding: unused\
443 * - decoding: set by lavc (before get_buffer() call))\
444 */\
445 int reference;\
446 \
447 /**\
448 * QP table\
449 * - encoding: unused\
450 * - decoding: set by lavc\
451 */\
452 int8_t *qscale_table;\
453 /**\
454 * QP store stride\
455 * - encoding: unused\
456 * - decoding: set by lavc\
457 */\
458 int qstride;\
459 \
460 /**\
461 * mbskip_table[mb]>=1 if MB didnt change\
462 * stride= mb_width = (width+15)>>4\
463 * - encoding: unused\
464 * - decoding: set by lavc\
465 */\
466 uint8_t *mbskip_table;\
467 \
468 /**\
469 * Motion vector table\
470 * - encoding: set by user\
471 * - decoding: set by lavc\
472 */\
473 int16_t (*motion_val[2])[2];\
474 \
475 /**\
476 * Macroblock type table\
477 * mb_type_base + mb_width + 2\
478 * - encoding: set by user\
479 * - decoding: set by lavc\
480 */\
481 uint32_t *mb_type;\
482 \
483 /**\
484 * Macroblock size: (0->16x16, 1->8x8, 2-> 4x4, 3-> 2x2)\
485 * - encoding: unused\
486 * - decoding: set by lavc\
487 */\
488 uint8_t motion_subsample_log2;\
489 \
490 /**\
491 * for some private data of the user\
492 * - encoding: unused\
493 * - decoding: set by user\
494 */\
495 void *opaque;\
496 \
497 /**\
498 * error\
499 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
500 * - decoding: unused\
501 */\
502 uint64_t error[4];\
503 \
504 /**\
505 * type of the buffer (to keep track of who has to dealloc data[*])\
506 * - encoding: set by the one who allocs it\
507 * - decoding: set by the one who allocs it\
508 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
509 */\
510 int type;\
511 \
512 /**\
513 * when decoding, this signal how much the picture must be delayed.\
514 * extra_delay = repeat_pict / (2*fps)\
515 * - encoding: unused\
516 * - decoding: set by lavc\
517 */\
518 int repeat_pict;\
519 \
520 /**\
521 * \
522 */\
523 int qscale_type;\
524 \
525 /**\
526 * The content of the picture is interlaced.\
527 * - encoding: set by user\
528 * - decoding: set by lavc (default 0)\
529 */\
530 int interlaced_frame;\
531 \
532 /**\
533 * if the content is interlaced, is top field displayed first.\
534 * - encoding: set by user\
535 * - decoding: set by lavc\
536 */\
537 int top_field_first;\
538 \
539 /**\
540 * Pan scan.\
541 * - encoding: set by user\
542 * - decoding: set by lavc\
543 */\
544 AVPanScan *pan_scan;\
545 \
546 /**\
547 * tell user application that palette has changed from previous frame.\
548 * - encoding: ??? (no palette-enabled encoder yet)\
549 * - decoding: set by lavc (default 0)\
550 */\
551 int palette_has_changed;\
552 \
553 /**\
554 * Codec suggestion on buffer type if != 0\
555 * - encoding: unused\
556 * - decoding: set by lavc (before get_buffer() call))\
557 */\
558 int buffer_hints;\
559 \
560 /**\
561 * DCT coeffitients\
562 * - encoding: unused\
563 * - decoding: set by lavc\
564 */\
565 short *dct_coeff;\
566 \
567 /**\
568 * Motion referece frame index\
569 * - encoding: set by user\
570 * - decoding: set by lavc\
571 */\
572 int8_t *ref_index[2];
573
574 #define FF_QSCALE_TYPE_MPEG1 0
575 #define FF_QSCALE_TYPE_MPEG2 1
576
577 #define FF_BUFFER_TYPE_INTERNAL 1
578 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
579 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
580 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
581
582
583 #define FF_I_TYPE 1 // Intra
584 #define FF_P_TYPE 2 // Predicted
585 #define FF_B_TYPE 3 // Bi-dir predicted
586 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
587 #define FF_SI_TYPE 5
588 #define FF_SP_TYPE 6
589
590 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
591 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
592 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
593 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
594
595 /**
596 * Audio Video Frame.
597 */
598 typedef struct AVFrame {
599 FF_COMMON_FRAME
600 } AVFrame;
601
602 #define DEFAULT_FRAME_RATE_BASE 1001000
603
604 /**
605 * Used by av_log
606 */
607 typedef struct AVCLASS AVClass;
608 struct AVCLASS {
609 const char* class_name;
610 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
611 or AVFormatContext, which begin with an AVClass.
612 Needed because av_log is in libavcodec and has no visibility
613 of AVIn/OutputFormat */
614 };
615
616 /**
617 * main external api structure.
618 */
619 typedef struct AVCodecContext {
620 /**
621 * Info on struct for av_log
622 * - set by avcodec_alloc_context
623 */
624 AVClass *av_class;
625 /**
626 * the average bitrate.
627 * - encoding: set by user. unused for constant quantizer encoding
628 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
629 */
630 int bit_rate;
631
632 /**
633 * number of bits the bitstream is allowed to diverge from the reference.
634 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
635 * - encoding: set by user. unused for constant quantizer encoding
636 * - decoding: unused
637 */
638 int bit_rate_tolerance;
639
640 /**
641 * CODEC_FLAG_*.
642 * - encoding: set by user.
643 * - decoding: set by user.
644 */
645 int flags;
646
647 /**
648 * some codecs needs additionnal format info. It is stored here
649 * - encoding: set by user.
650 * - decoding: set by lavc. (FIXME is this ok?)
651 */
652 int sub_id;
653
654 /**
655 * motion estimation algorithm used for video coding.
656 * - encoding: MUST be set by user.
657 * - decoding: unused
658 */
659 int me_method;
660
661 /**
662 * some codecs need / can use extra-data like huffman tables.
663 * mjpeg: huffman tables
664 * rv10: additional flags
665 * mpeg4: global headers (they can be in the bitstream or here)
666 * - encoding: set/allocated/freed by lavc.
667 * - decoding: set/allocated/freed by user.
668 */
669 void *extradata;
670 int extradata_size;
671
672 /* video only */
673 /**
674 * frames per sec multiplied by frame_rate_base.
675 * for variable fps this is the precission, so if the timestamps
676 * can be specified in msec precssion then this is 1000*frame_rate_base
677 * - encoding: MUST be set by user
678 * - decoding: set by lavc. 0 or the frame_rate if available
679 */
680 int frame_rate;
681
682 /**
683 * picture width / height.
684 * - encoding: MUST be set by user.
685 * - decoding: set by lavc.
686 * Note, for compatibility its possible to set this instead of
687 * coded_width/height before decoding
688 */
689 int width, height;
690
691 #define FF_ASPECT_EXTENDED 15
692
693 /**
694 * the number of pictures in a group of pitures, or 0 for intra_only.
695 * - encoding: set by user.
696 * - decoding: unused
697 */
698 int gop_size;
699
700 /**
701 * pixel format, see PIX_FMT_xxx.
702 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
703 * conversion is in order. This only works for
704 * codecs with one supported pix_fmt, we should
705 * do something for a generic case as well.
706 * - decoding: set by lavc.
707 */
708 enum PixelFormat pix_fmt;
709
710 /**
711 * Frame rate emulation. If not zero lower layer (i.e. format handler)
712 * has to read frames at native frame rate.
713 * - encoding: set by user.
714 * - decoding: unused.
715 */
716 int rate_emu;
717
718 /**
719 * if non NULL, 'draw_horiz_band' is called by the libavcodec
720 * decoder to draw an horizontal band. It improve cache usage. Not
721 * all codecs can do that. You must check the codec capabilities
722 * before
723 * - encoding: unused
724 * - decoding: set by user.
725 * @param height the height of the slice
726 * @param y the y position of the slice
727 * @param type 1->top field, 2->bottom field, 3->frame
728 * @param offset offset into the AVFrame.data from which the slice should be read
729 */
730 void (*draw_horiz_band)(struct AVCodecContext *s,
731 const AVFrame *src, int offset[4],
732 int y, int type, int height);
733
734 /* audio only */
735 int sample_rate; ///< samples per sec
736 int channels;
737 int sample_fmt; ///< sample format, currenly unused
738
739 /* the following data should not be initialized */
740 int frame_size; ///< in samples, initialized when calling 'init'
741 int frame_number; ///< audio or video frame number
742 int real_pict_num; ///< returns the real picture number of previous encoded frame
743
744 /**
745 * number of frames the decoded output will be delayed relative to
746 * the encoded input.
747 * - encoding: set by lavc.
748 * - decoding: unused
749 */
750 int delay;
751
752 /* - encoding parameters */
753 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
754 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
755
756 /**
757 * minimum quantizer.
758 * - encoding: set by user.
759 * - decoding: unused
760 */
761 int qmin;
762
763 /**
764 * maximum quantizer.
765 * - encoding: set by user.
766 * - decoding: unused
767 */
768 int qmax;
769
770 /**
771 * maximum quantizer difference etween frames.
772 * - encoding: set by user.
773 * - decoding: unused
774 */
775 int max_qdiff;
776
777 /**
778 * maximum number of b frames between non b frames.
779 * note: the output will be delayed by max_b_frames+1 relative to the input
780 * - encoding: set by user.
781 * - decoding: unused
782 */
783 int max_b_frames;
784
785 /**
786 * qscale factor between ip and b frames.
787 * - encoding: set by user.
788 * - decoding: unused
789 */
790 float b_quant_factor;
791
792 /** obsolete FIXME remove */
793 int rc_strategy;
794 int b_frame_strategy;
795
796 /**
797 * hurry up amount.
798 * - encoding: unused
799 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
800 */
801 int hurry_up;
802
803 struct AVCodec *codec;
804
805 void *priv_data;
806
807 /* unused, FIXME remove*/
808 int rtp_mode;
809
810 int rtp_payload_size; /* The size of the RTP payload, the coder will */
811 /* do it's best to deliver a chunk with size */
812 /* below rtp_payload_size, the chunk will start */
813 /* with a start code on some codecs like H.263 */
814 /* This doesn't take account of any particular */
815 /* headers inside the transmited RTP payload */
816
817
818 /* The RTP callcack: This function is called */
819 /* every time the encoder as a packet to send */
820 /* Depends on the encoder if the data starts */
821 /* with a Start Code (it should) H.263 does */
822 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int packet_number);
823
824 /* statistics, used for 2-pass encoding */
825 int mv_bits;
826 int header_bits;
827 int i_tex_bits;
828 int p_tex_bits;
829 int i_count;
830 int p_count;
831 int skip_count;
832 int misc_bits;
833
834 /**
835 * number of bits used for the previously encoded frame.
836 * - encoding: set by lavc
837 * - decoding: unused
838 */
839 int frame_bits;
840
841 /**
842 * private data of the user, can be used to carry app specific stuff.
843 * - encoding: set by user
844 * - decoding: set by user
845 */
846 void *opaque;
847
848 char codec_name[32];
849 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
850 enum CodecID codec_id; /* see CODEC_ID_xxx */
851
852 /**
853 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
854 * this is used to workaround some encoder bugs
855 * - encoding: set by user, if not then the default based on codec_id will be used
856 * - decoding: set by user, will be converted to upper case by lavc during init
857 */
858 unsigned int codec_tag;
859
860 /**
861 * workaround bugs in encoders which sometimes cannot be detected automatically.
862 * - encoding: unused
863 * - decoding: set by user
864 */
865 int workaround_bugs;
866 #define FF_BUG_AUTODETECT 1 ///< autodetection
867 #define FF_BUG_OLD_MSMPEG4 2
868 #define FF_BUG_XVID_ILACE 4
869 #define FF_BUG_UMP4 8
870 #define FF_BUG_NO_PADDING 16
871 #define FF_BUG_AMV 32
872 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
873 #define FF_BUG_QPEL_CHROMA 64
874 #define FF_BUG_STD_QPEL 128
875 #define FF_BUG_QPEL_CHROMA2 256
876 #define FF_BUG_DIRECT_BLOCKSIZE 512
877 #define FF_BUG_EDGE 1024
878 #define FF_BUG_HPEL_CHROMA 2048
879 #define FF_BUG_DC_CLIP 4096
880 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
881
882 /**
883 * luma single coeff elimination threshold.
884 * - encoding: set by user
885 * - decoding: unused
886 */
887 int luma_elim_threshold;
888
889 /**
890 * chroma single coeff elimination threshold.
891 * - encoding: set by user
892 * - decoding: unused
893 */
894 int chroma_elim_threshold;
895
896 /**
897 * strictly follow the std (MPEG4, ...).
898 * - encoding: set by user
899 * - decoding: unused
900 */
901 int strict_std_compliance;
902
903 /**
904 * qscale offset between ip and b frames.
905 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
906 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
907 * - encoding: set by user.
908 * - decoding: unused
909 */
910 float b_quant_offset;
911
912 /**
913 * error resilience higher values will detect more errors but may missdetect
914 * some more or less valid parts as errors.
915 * - encoding: unused
916 * - decoding: set by user
917 */
918 int error_resilience;
919 #define FF_ER_CAREFULL 1
920 #define FF_ER_COMPLIANT 2
921 #define FF_ER_AGGRESSIVE 3
922 #define FF_ER_VERY_AGGRESSIVE 4
923
924 /**
925 * called at the beginning of each frame to get a buffer for it.
926 * if pic.reference is set then the frame will be read later by lavc
927 * avcodec_align_dimensions() should be used to find the required width and
928 * height, as they normally need to be rounded up to the next multiple of 16
929 * - encoding: unused
930 * - decoding: set by lavc, user can override
931 */
932 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
933
934 /**
935 * called to release buffers which where allocated with get_buffer.
936 * a released buffer can be reused in get_buffer()
937 * pic.data[*] must be set to NULL
938 * - encoding: unused
939 * - decoding: set by lavc, user can override
940 */
941 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
942
943 /**
944 * if 1 the stream has a 1 frame delay during decoding.
945 * - encoding: set by lavc
946 * - decoding: set by lavc
947 */
948 int has_b_frames;
949
950 int block_align; ///< used by some WAV based audio codecs
951
952 int parse_only; /* - decoding only: if true, only parsing is done
953 (function avcodec_parse_frame()). The frame
954 data is returned. Only MPEG codecs support this now. */
955
956 /**
957 * 0-> h263 quant 1-> mpeg quant.
958 * - encoding: set by user.
959 * - decoding: unused
960 */
961 int mpeg_quant;
962
963 /**
964 * pass1 encoding statistics output buffer.
965 * - encoding: set by lavc
966 * - decoding: unused
967 */
968 char *stats_out;
969
970 /**
971 * pass2 encoding statistics input buffer.
972 * concatenated stuff from stats_out of pass1 should be placed here
973 * - encoding: allocated/set/freed by user
974 * - decoding: unused
975 */
976 char *stats_in;
977
978 /**
979 * ratecontrol qmin qmax limiting method.
980 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
981 * - encoding: set by user.
982 * - decoding: unused
983 */
984 float rc_qsquish;
985
986 float rc_qmod_amp;
987 int rc_qmod_freq;
988
989 /**
990 * ratecontrol override, see RcOverride.
991 * - encoding: allocated/set/freed by user.
992 * - decoding: unused
993 */
994 RcOverride *rc_override;
995 int rc_override_count;
996
997 /**
998 * rate control equation.
999 * - encoding: set by user
1000 * - decoding: unused
1001 */
1002 char *rc_eq;
1003
1004 /**
1005 * maximum bitrate.
1006 * - encoding: set by user.
1007 * - decoding: unused
1008 */
1009 int rc_max_rate;
1010
1011 /**
1012 * minimum bitrate.
1013 * - encoding: set by user.
1014 * - decoding: unused
1015 */
1016 int rc_min_rate;
1017
1018 /**
1019 * decoder bitstream buffer size.
1020 * - encoding: set by user.
1021 * - decoding: unused
1022 */
1023 int rc_buffer_size;
1024 float rc_buffer_aggressivity;
1025
1026 /**
1027 * qscale factor between p and i frames.
1028 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1029 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1030 * - encoding: set by user.
1031 * - decoding: unused
1032 */
1033 float i_quant_factor;
1034
1035 /**
1036 * qscale offset between p and i frames.
1037 * - encoding: set by user.
1038 * - decoding: unused
1039 */
1040 float i_quant_offset;
1041
1042 /**
1043 * initial complexity for pass1 ratecontrol.
1044 * - encoding: set by user.
1045 * - decoding: unused
1046 */
1047 float rc_initial_cplx;
1048
1049 /**
1050 * dct algorithm, see FF_DCT_* below.
1051 * - encoding: set by user
1052 * - decoding: unused
1053 */
1054 int dct_algo;
1055 #define FF_DCT_AUTO 0
1056 #define FF_DCT_FASTINT 1
1057 #define FF_DCT_INT 2
1058 #define FF_DCT_MMX 3
1059 #define FF_DCT_MLIB 4
1060 #define FF_DCT_ALTIVEC 5
1061 #define FF_DCT_FAAN 6
1062
1063 /**
1064 * luminance masking (0-> disabled).
1065 * - encoding: set by user
1066 * - decoding: unused
1067 */
1068 float lumi_masking;
1069
1070 /**
1071 * temporary complexity masking (0-> disabled).
1072 * - encoding: set by user
1073 * - decoding: unused
1074 */
1075 float temporal_cplx_masking;
1076
1077 /**
1078 * spatial complexity masking (0-> disabled).
1079 * - encoding: set by user
1080 * - decoding: unused
1081 */
1082 float spatial_cplx_masking;
1083
1084 /**
1085 * p block masking (0-> disabled).
1086 * - encoding: set by user
1087 * - decoding: unused
1088 */
1089 float p_masking;
1090
1091 /**
1092 * darkness masking (0-> disabled).
1093 * - encoding: set by user
1094 * - decoding: unused
1095 */
1096 float dark_masking;
1097
1098
1099 /* for binary compatibility */
1100 int unused;
1101
1102 /**
1103 * idct algorithm, see FF_IDCT_* below.
1104 * - encoding: set by user
1105 * - decoding: set by user
1106 */
1107 int idct_algo;
1108 #define FF_IDCT_AUTO 0
1109 #define FF_IDCT_INT 1
1110 #define FF_IDCT_SIMPLE 2
1111 #define FF_IDCT_SIMPLEMMX 3
1112 #define FF_IDCT_LIBMPEG2MMX 4
1113 #define FF_IDCT_PS2 5
1114 #define FF_IDCT_MLIB 6
1115 #define FF_IDCT_ARM 7
1116 #define FF_IDCT_ALTIVEC 8
1117 #define FF_IDCT_SH4 9
1118 #define FF_IDCT_SIMPLEARM 10
1119 #define FF_IDCT_H264 11
1120
1121 /**
1122 * slice count.
1123 * - encoding: set by lavc
1124 * - decoding: set by user (or 0)
1125 */
1126 int slice_count;
1127 /**
1128 * slice offsets in the frame in bytes.
1129 * - encoding: set/allocated by lavc
1130 * - decoding: set/allocated by user (or NULL)
1131 */
1132 int *slice_offset;
1133
1134 /**
1135 * error concealment flags.
1136 * - encoding: unused
1137 * - decoding: set by user
1138 */
1139 int error_concealment;
1140 #define FF_EC_GUESS_MVS 1
1141 #define FF_EC_DEBLOCK 2
1142
1143 /**
1144 * dsp_mask could be add used to disable unwanted CPU features
1145 * CPU features (i.e. MMX, SSE. ...)
1146 *
1147 * with FORCE flag you may instead enable given CPU features
1148 * (Dangerous: usable in case of misdetection, improper usage however will
1149 * result into program crash)
1150 */
1151 unsigned dsp_mask;
1152 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1153 /* lower 16 bits - CPU features */
1154 #ifdef HAVE_MMX
1155 #define FF_MM_MMX 0x0001 /* standard MMX */
1156 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1157 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1158 #define FF_MM_SSE 0x0008 /* SSE functions */
1159 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1160 #endif /* HAVE_MMX */
1161
1162 /**
1163 * bits per sample/pixel from the demuxer (needed for huffyuv).
1164 * - encoding: set by lavc
1165 * - decoding: set by user
1166 */
1167 int bits_per_sample;
1168
1169 /**
1170 * prediction method (needed for huffyuv).
1171 * - encoding: set by user
1172 * - decoding: unused
1173 */
1174 int prediction_method;
1175 #define FF_PRED_LEFT 0
1176 #define FF_PRED_PLANE 1
1177 #define FF_PRED_MEDIAN 2
1178
1179 /**
1180 * sample aspect ratio (0 if unknown).
1181 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1182 * - encoding: set by user.
1183 * - decoding: set by lavc.
1184 */
1185 AVRational sample_aspect_ratio;
1186
1187 /**
1188 * the picture in the bitstream.
1189 * - encoding: set by lavc
1190 * - decoding: set by lavc
1191 */
1192 AVFrame *coded_frame;
1193
1194 /**
1195 * debug.
1196 * - encoding: set by user.
1197 * - decoding: set by user.
1198 */
1199 int debug;
1200 #define FF_DEBUG_PICT_INFO 1
1201 #define FF_DEBUG_RC 2
1202 #define FF_DEBUG_BITSTREAM 4
1203 #define FF_DEBUG_MB_TYPE 8
1204 #define FF_DEBUG_QP 16
1205 #define FF_DEBUG_MV 32
1206 #define FF_DEBUG_DCT_COEFF 0x00000040
1207 #define FF_DEBUG_SKIP 0x00000080
1208 #define FF_DEBUG_STARTCODE 0x00000100
1209 #define FF_DEBUG_PTS 0x00000200
1210 #define FF_DEBUG_ER 0x00000400
1211 #define FF_DEBUG_MMCO 0x00000800
1212 #define FF_DEBUG_BUGS 0x00001000
1213 #define FF_DEBUG_VIS_QP 0x00002000
1214 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1215
1216 /**
1217 * debug.
1218 * - encoding: set by user.
1219 * - decoding: set by user.
1220 */
1221 int debug_mv;
1222 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1223 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1224 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1225
1226 /**
1227 * error.
1228 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1229 * - decoding: unused
1230 */
1231 uint64_t error[4];
1232
1233 /**
1234 * minimum MB quantizer.
1235 * - encoding: set by user.
1236 * - decoding: unused
1237 */
1238 int mb_qmin;
1239
1240 /**
1241 * maximum MB quantizer.
1242 * - encoding: set by user.
1243 * - decoding: unused
1244 */
1245 int mb_qmax;
1246
1247 /**
1248 * motion estimation compare function.
1249 * - encoding: set by user.
1250 * - decoding: unused
1251 */
1252 int me_cmp;
1253 /**
1254 * subpixel motion estimation compare function.
1255 * - encoding: set by user.
1256 * - decoding: unused
1257 */
1258 int me_sub_cmp;
1259 /**
1260 * macroblock compare function (not supported yet).
1261 * - encoding: set by user.
1262 * - decoding: unused
1263 */
1264 int mb_cmp;
1265 /**
1266 * interlaced dct compare function
1267 * - encoding: set by user.
1268 * - decoding: unused
1269 */
1270 int ildct_cmp;
1271 #define FF_CMP_SAD 0
1272 #define FF_CMP_SSE 1
1273 #define FF_CMP_SATD 2
1274 #define FF_CMP_DCT 3
1275 #define FF_CMP_PSNR 4
1276 #define FF_CMP_BIT 5
1277 #define FF_CMP_RD 6
1278 #define FF_CMP_ZERO 7
1279 #define FF_CMP_VSAD 8
1280 #define FF_CMP_VSSE 9
1281 #define FF_CMP_NSSE 10
1282 #define FF_CMP_W53 11
1283 #define FF_CMP_W97 12
1284 #define FF_CMP_CHROMA 256
1285
1286 /**
1287 * ME diamond size & shape.
1288 * - encoding: set by user.
1289 * - decoding: unused
1290 */
1291 int dia_size;
1292
1293 /**
1294 * amount of previous MV predictors (2a+1 x 2a+1 square).
1295 * - encoding: set by user.
1296 * - decoding: unused
1297 */
1298 int last_predictor_count;
1299
1300 /**
1301 * pre pass for motion estimation.
1302 * - encoding: set by user.
1303 * - decoding: unused
1304 */
1305 int pre_me;
1306
1307 /**
1308 * motion estimation pre pass compare function.
1309 * - encoding: set by user.
1310 * - decoding: unused
1311 */
1312 int me_pre_cmp;
1313
1314 /**
1315 * ME pre pass diamond size & shape.
1316 * - encoding: set by user.
1317 * - decoding: unused
1318 */
1319 int pre_dia_size;
1320
1321 /**
1322 * subpel ME quality.
1323 * - encoding: set by user.
1324 * - decoding: unused
1325 */
1326 int me_subpel_quality;
1327
1328 /**
1329 * callback to negotiate the pixelFormat.
1330 * @param fmt is the list of formats which are supported by the codec,
1331 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1332 * the first is allways the native one
1333 * @return the choosen format
1334 * - encoding: unused
1335 * - decoding: set by user, if not set then the native format will always be choosen
1336 */
1337 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1338
1339 /**
1340 * DTG active format information (additionnal aspect ratio
1341 * information only used in DVB MPEG2 transport streams). 0 if
1342 * not set.
1343 *
1344 * - encoding: unused.
1345 * - decoding: set by decoder
1346 */
1347 int dtg_active_format;
1348 #define FF_DTG_AFD_SAME 8
1349 #define FF_DTG_AFD_4_3 9
1350 #define FF_DTG_AFD_16_9 10
1351 #define FF_DTG_AFD_14_9 11
1352 #define FF_DTG_AFD_4_3_SP_14_9 13
1353 #define FF_DTG_AFD_16_9_SP_14_9 14
1354 #define FF_DTG_AFD_SP_4_3 15
1355
1356 /**
1357 * Maximum motion estimation search range in subpel units.
1358 * if 0 then no limit
1359 *
1360 * - encoding: set by user.
1361 * - decoding: unused.
1362 */
1363 int me_range;
1364
1365 /**
1366 * frame_rate_base.
1367 * for variable fps this is 1
1368 * - encoding: set by user.
1369 * - decoding: set by lavc.
1370 * @todo move this after frame_rate
1371 */
1372
1373 int frame_rate_base;
1374 /**
1375 * intra quantizer bias.
1376 * - encoding: set by user.
1377 * - decoding: unused
1378 */
1379 int intra_quant_bias;
1380 #define FF_DEFAULT_QUANT_BIAS 999999
1381
1382 /**
1383 * inter quantizer bias.
1384 * - encoding: set by user.
1385 * - decoding: unused
1386 */
1387 int inter_quant_bias;
1388
1389 /**
1390 * color table ID.
1391 * - encoding: unused.
1392 * - decoding: which clrtable should be used for 8bit RGB images
1393 * table have to be stored somewhere FIXME
1394 */
1395 int color_table_id;
1396
1397 /**
1398 * internal_buffer count.
1399 * Dont touch, used by lavc default_get_buffer()
1400 */
1401 int internal_buffer_count;
1402
1403 /**
1404 * internal_buffers.
1405 * Dont touch, used by lavc default_get_buffer()
1406 */
1407 void *internal_buffer;
1408
1409 #define FF_LAMBDA_SHIFT 7
1410 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1411 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1412 #define FF_LAMBDA_MAX (256*128-1)
1413
1414 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1415 /**
1416 * global quality for codecs which cannot change it per frame.
1417 * this should be proportional to MPEG1/2/4 qscale.
1418 * - encoding: set by user.
1419 * - decoding: unused
1420 */
1421 int global_quality;
1422
1423 #define FF_CODER_TYPE_VLC 0
1424 #define FF_CODER_TYPE_AC 1
1425 /**
1426 * coder type
1427 * - encoding: set by user.
1428 * - decoding: unused
1429 */
1430 int coder_type;
1431
1432 /**
1433 * context model
1434 * - encoding: set by user.
1435 * - decoding: unused
1436 */
1437 int context_model;
1438
1439 /**
1440 * slice flags
1441 * - encoding: unused
1442 * - decoding: set by user.
1443 */
1444 int slice_flags;
1445 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1446 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1447 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1448
1449 /**
1450 * XVideo Motion Acceleration
1451 * - encoding: forbidden
1452 * - decoding: set by decoder
1453 */
1454 int xvmc_acceleration;
1455
1456 /**
1457 * macroblock decision mode
1458 * - encoding: set by user.
1459 * - decoding: unused
1460 */
1461 int mb_decision;
1462 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1463 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1464 #define FF_MB_DECISION_RD 2 ///< rate distoration
1465
1466 /**
1467 * custom intra quantization matrix
1468 * - encoding: set by user, can be NULL
1469 * - decoding: set by lavc
1470 */
1471 uint16_t *intra_matrix;
1472
1473 /**
1474 * custom inter quantization matrix
1475 * - encoding: set by user, can be NULL
1476 * - decoding: set by lavc
1477 */
1478 uint16_t *inter_matrix;
1479
1480 /**
1481 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1482 * this is used to workaround some encoder bugs
1483 * - encoding: unused
1484 * - decoding: set by user, will be converted to upper case by lavc during init
1485 */
1486 unsigned int stream_codec_tag;
1487
1488 /**
1489 * scene change detection threshold.
1490 * 0 is default, larger means fewer detected scene changes
1491 * - encoding: set by user.
1492 * - decoding: unused
1493 */
1494 int scenechange_threshold;
1495
1496 /**
1497 * minimum lagrange multipler
1498 * - encoding: set by user.
1499 * - decoding: unused
1500 */
1501 int lmin;
1502
1503 /**
1504 * maximum lagrange multipler
1505 * - encoding: set by user.
1506 * - decoding: unused
1507 */
1508 int lmax;
1509
1510 /**
1511 * Palette control structure
1512 * - encoding: ??? (no palette-enabled encoder yet)
1513 * - decoding: set by user.
1514 */
1515 struct AVPaletteControl *palctrl;
1516
1517 /**
1518 * noise reduction strength
1519 * - encoding: set by user.
1520 * - decoding: unused
1521 */
1522 int noise_reduction;
1523
1524 /**
1525 * called at the beginning of a frame to get cr buffer for it.
1526 * buffer type (size, hints) must be the same. lavc won't check it.
1527 * lavc will pass previous buffer in pic, function should return
1528 * same buffer or new buffer with old frame "painted" into it.
1529 * if pic.data[0] == NULL must behave like get_buffer().
1530 * - encoding: unused
1531 * - decoding: set by lavc, user can override
1532 */
1533 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1534
1535 /**
1536 * number of bits which should be loaded into the rc buffer before decoding starts
1537 * - encoding: set by user.
1538 * - decoding: unused
1539 */
1540 int rc_initial_buffer_occupancy;
1541
1542 /**
1543 *
1544 * - encoding: set by user.
1545 * - decoding: unused
1546 */
1547 int inter_threshold;
1548
1549 /**
1550 * CODEC_FLAG2_*.
1551 * - encoding: set by user.
1552 * - decoding: set by user.
1553 */
1554 int flags2;
1555
1556 /**
1557 * simulates errors in the bitstream to test error concealment.
1558 * - encoding: set by user.
1559 * - decoding: unused.
1560 */
1561 int error_rate;
1562
1563 /**
1564 * MP3 antialias algorithm, see FF_AA_* below.
1565 * - encoding: unused
1566 * - decoding: set by user
1567 */
1568 int antialias_algo;
1569 #define FF_AA_AUTO 0
1570 #define FF_AA_FASTINT 1 //not implemented yet
1571 #define FF_AA_INT 2
1572 #define FF_AA_FLOAT 3
1573 /**
1574 * Quantizer noise shaping.
1575 * - encoding: set by user
1576 * - decoding: unused
1577 */
1578 int quantizer_noise_shaping;
1579
1580 /**
1581 * Thread count.
1582 * is used to decide how many independant tasks should be passed to execute()
1583 * - encoding: set by user
1584 * - decoding: set by user
1585 */
1586 int thread_count;
1587
1588 /**
1589 * the codec may call this to execute several independant things. it will return only after
1590 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1591 * default implementation will execute the parts serially
1592 * @param count the number of things to execute
1593 * - encoding: set by lavc, user can override
1594 * - decoding: set by lavc, user can override
1595 */
1596 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1597
1598 /**
1599 * Thread opaque.
1600 * can be used by execute() to store some per AVCodecContext stuff.
1601 * - encoding: set by execute()
1602 * - decoding: set by execute()
1603 */
1604 void *thread_opaque;
1605
1606 /**
1607 * Motion estimation threshold. under which no motion estimation is
1608 * performed, but instead the user specified motion vectors are used
1609 *
1610 * - encoding: set by user
1611 * - decoding: unused
1612 */
1613 int me_threshold;
1614
1615 /**
1616 * Macroblock threshold. under which the user specified macroblock types will be used
1617 * - encoding: set by user
1618 * - decoding: unused
1619 */
1620 int mb_threshold;
1621
1622 /**
1623 * precision of the intra dc coefficient - 8.
1624 * - encoding: set by user
1625 * - decoding: unused
1626 */
1627 int intra_dc_precision;
1628
1629 /**
1630 * noise vs. sse weight for the nsse comparsion function.
1631 * - encoding: set by user
1632 * - decoding: unused
1633 */
1634 int nsse_weight;
1635
1636 /**
1637 * number of macroblock rows at the top which are skiped.
1638 * - encoding: unused
1639 * - decoding: set by user
1640 */
1641 int skip_top;
1642
1643 /**
1644 * number of macroblock rows at the bottom which are skiped.
1645 * - encoding: unused
1646 * - decoding: set by user
1647 */
1648 int skip_bottom;
1649
1650 /**
1651 * profile
1652 * - encoding: set by user
1653 * - decoding: set by lavc
1654 */
1655 int profile;
1656 #define FF_PROFILE_UNKNOWN -99
1657
1658 /**
1659 * level
1660 * - encoding: set by user
1661 * - decoding: set by lavc
1662 */
1663 int level;
1664 #define FF_LEVEL_UNKNOWN -99
1665
1666 /**
1667 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1668 * - encoding: unused
1669 * - decoding: set by user
1670 */
1671 int lowres;
1672
1673 /**
1674 * bistream width / height. may be different from width/height if lowres
1675 * or other things are used
1676 * - encoding: unused
1677 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1678 */
1679 int coded_width, coded_height;
1680 } AVCodecContext;
1681
1682
1683 /**
1684 * AVOption.
1685 */
1686 typedef struct AVOption {
1687 /** options' name */
1688 const char *name; /* if name is NULL, it indicates a link to next */
1689 /** short English text help or const struct AVOption* subpointer */
1690 const char *help; // const struct AVOption* sub;
1691 /** offset to context structure where the parsed value should be stored */
1692 int offset;
1693 /** options' type */
1694 int type;
1695 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1696 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1697 #define FF_OPT_TYPE_INT 3 ///< integer
1698 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1699 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1700 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1701 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1702 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1703 /** min value (min == max -> no limits) */
1704 double min;
1705 /** maximum value for double/int */
1706 double max;
1707 /** default boo [0,1]l/double/int value */
1708 double defval;
1709 /**
1710 * default string value (with optional semicolon delimited extra option-list
1711 * i.e. option1;option2;option3
1712 * defval might select other then first argument as default
1713 */
1714 const char *defstr;
1715 #define FF_OPT_MAX_DEPTH 10
1716 } AVOption;
1717
1718 /**
1719 * Parse option(s) and sets fields in passed structure
1720 * @param strct structure where the parsed results will be written
1721 * @param list list with AVOptions
1722 * @param opts string with options for parsing
1723 */
1724 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1725
1726
1727 /**
1728 * AVCodec.
1729 */
1730 typedef struct AVCodec {
1731 const char *name;
1732 enum CodecType type;
1733 int id;
1734 int priv_data_size;
1735 int (*init)(AVCodecContext *);
1736 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1737 int (*close)(AVCodecContext *);
1738 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1739 uint8_t *buf, int buf_size);
1740 int capabilities;
1741 const AVOption *options;
1742 struct AVCodec *next;
1743 void (*flush)(AVCodecContext *);
1744 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1745 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1746 } AVCodec;
1747
1748 /**
1749 * four components are given, that's all.
1750 * the last component is alpha
1751 */
1752 typedef struct AVPicture {
1753 uint8_t *data[4];
1754 int linesize[4]; ///< number of bytes per line
1755 } AVPicture;
1756
1757 /**
1758 * AVPaletteControl
1759 * This structure defines a method for communicating palette changes
1760 * between and demuxer and a decoder.
1761 */
1762 #define AVPALETTE_SIZE 1024
1763 #define AVPALETTE_COUNT 256
1764 typedef struct AVPaletteControl {
1765
1766 /* demuxer sets this to 1 to indicate the palette has changed;
1767 * decoder resets to 0 */
1768 int palette_changed;
1769
1770 /* 4-byte ARGB palette entries, stored in native byte order; note that
1771 * the individual palette components should be on a 8-bit scale; if
1772 * the palette data comes from a IBM VGA native format, the component
1773 * data is probably 6 bits in size and needs to be scaled */
1774 unsigned int palette[AVPALETTE_COUNT];
1775
1776 } AVPaletteControl;
1777
1778 extern AVCodec ac3_encoder;
1779 extern AVCodec mp2_encoder;
1780 extern AVCodec mp3lame_encoder;
1781 extern AVCodec oggvorbis_encoder;
1782 extern AVCodec faac_encoder;
1783 extern AVCodec xvid_encoder;
1784 extern AVCodec mpeg1video_encoder;
1785 extern AVCodec mpeg2video_encoder;
1786 extern AVCodec h263_encoder;
1787 extern AVCodec h263p_encoder;
1788 extern AVCodec flv_encoder;
1789 extern AVCodec rv10_encoder;
1790 extern AVCodec rv20_encoder;
1791 extern AVCodec dvvideo_encoder;
1792 extern AVCodec mjpeg_encoder;
1793 extern AVCodec ljpeg_encoder;
1794 extern AVCodec mpeg4_encoder;
1795 extern AVCodec msmpeg4v1_encoder;
1796 extern AVCodec msmpeg4v2_encoder;
1797 extern AVCodec msmpeg4v3_encoder;
1798 extern AVCodec wmv1_encoder;
1799 extern AVCodec wmv2_encoder;
1800 extern AVCodec huffyuv_encoder;
1801 extern AVCodec h264_encoder;
1802 extern AVCodec asv1_encoder;
1803 extern AVCodec asv2_encoder;
1804 extern AVCodec vcr1_encoder;
1805 extern AVCodec ffv1_encoder;
1806 extern AVCodec snow_encoder;
1807 extern AVCodec mdec_encoder;
1808 extern AVCodec zlib_encoder;
1809 extern AVCodec sonic_encoder;
1810 extern AVCodec sonic_ls_encoder;
1811 extern AVCodec svq1_encoder;
1812
1813 extern AVCodec h263_decoder;
1814 extern AVCodec h261_decoder;
1815 extern AVCodec mpeg4_decoder;
1816 extern AVCodec msmpeg4v1_decoder;
1817 extern AVCodec msmpeg4v2_decoder;
1818 extern AVCodec msmpeg4v3_decoder;
1819 extern AVCodec wmv1_decoder;
1820 extern AVCodec wmv2_decoder;
1821 extern AVCodec mpeg1video_decoder;
1822 extern AVCodec mpeg2video_decoder;
1823 extern AVCodec mpegvideo_decoder;
1824 extern AVCodec mpeg_xvmc_decoder;
1825 extern AVCodec h263i_decoder;
1826 extern AVCodec flv_decoder;
1827 extern AVCodec rv10_decoder;
1828 extern AVCodec rv20_decoder;
1829 extern AVCodec svq1_decoder;
1830 extern AVCodec svq3_decoder;
1831 extern AVCodec dvvideo_decoder;
1832 extern AVCodec wmav1_decoder;
1833 extern AVCodec wmav2_decoder;
1834 extern AVCodec mjpeg_decoder;
1835 extern AVCodec mjpegb_decoder;
1836 extern AVCodec sp5x_decoder;
1837 extern AVCodec mp2_decoder;
1838 extern AVCodec mp3_decoder;
1839 extern AVCodec mace3_decoder;
1840 extern AVCodec mace6_decoder;
1841 extern AVCodec huffyuv_decoder;
1842 extern AVCodec oggvorbis_decoder;
1843 extern AVCodec cyuv_decoder;
1844 extern AVCodec h264_decoder;
1845 extern AVCodec indeo3_decoder;
1846 extern AVCodec vp3_decoder;
1847 extern AVCodec theora_decoder;
1848 extern AVCodec amr_nb_decoder;
1849 extern AVCodec amr_nb_encoder;
1850 extern AVCodec amr_wb_encoder;
1851 extern AVCodec amr_wb_decoder;
1852 extern AVCodec aac_decoder;
1853 extern AVCodec mpeg4aac_decoder;
1854 extern AVCodec asv1_decoder;
1855 extern AVCodec asv2_decoder;
1856 extern AVCodec vcr1_decoder;
1857 extern AVCodec cljr_decoder;
1858 extern AVCodec ffv1_decoder;
1859 extern AVCodec snow_decoder;
1860 extern AVCodec fourxm_decoder;
1861 extern AVCodec mdec_decoder;
1862 extern AVCodec roq_decoder;
1863 extern AVCodec interplay_video_decoder;
1864 extern AVCodec xan_wc3_decoder;
1865 extern AVCodec rpza_decoder;
1866 extern AVCodec cinepak_decoder;
1867 extern AVCodec msrle_decoder;
1868 extern AVCodec msvideo1_decoder;
1869 extern AVCodec vqa_decoder;
1870 extern AVCodec idcin_decoder;
1871 extern AVCodec eightbps_decoder;
1872 extern AVCodec smc_decoder;
1873 extern AVCodec flic_decoder;
1874 extern AVCodec vmdvideo_decoder;
1875 extern AVCodec vmdaudio_decoder;
1876 extern AVCodec truemotion1_decoder;
1877 extern AVCodec mszh_decoder;
1878 extern AVCodec zlib_decoder;
1879 extern AVCodec ra_144_decoder;
1880 extern AVCodec ra_288_decoder;
1881 extern AVCodec roq_dpcm_decoder;
1882 extern AVCodec interplay_dpcm_decoder;
1883 extern AVCodec xan_dpcm_decoder;
1884 extern AVCodec sol_dpcm_decoder;
1885 extern AVCodec sonic_decoder;
1886 extern AVCodec qtrle_decoder;
1887 extern AVCodec flac_decoder;
1888 extern AVCodec tscc_decoder;
1889 extern AVCodec ulti_decoder;
1890 extern AVCodec qdraw_decoder;
1891
1892 /* pcm codecs */
1893 #define PCM_CODEC(id, name) \
1894 extern AVCodec name ## _decoder; \
1895 extern AVCodec name ## _encoder
1896
1897 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1898 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1899 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1900 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1901 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1902 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1903 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1904 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1905
1906 /* adpcm codecs */
1907
1908 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1909 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1910 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1911 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1912 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1913 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
1914 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1915 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1916 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1917 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1918 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
1919 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
1920 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
1921
1922 #undef PCM_CODEC
1923
1924 /* dummy raw video codec */
1925 extern AVCodec rawvideo_encoder;
1926 extern AVCodec rawvideo_decoder;
1927
1928 /* the following codecs use external GPL libs */
1929 extern AVCodec ac3_decoder;
1930 extern AVCodec dts_decoder;
1931
1932 /* resample.c */
1933
1934 struct ReSampleContext;
1935 struct AVResampleContext;
1936
1937 typedef struct ReSampleContext ReSampleContext;
1938
1939 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1940 int output_rate, int input_rate);
1941 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1942 void audio_resample_close(ReSampleContext *s);
1943
1944 struct AVResampleContext *av_resample_init(int out_rate, int in_rate);
1945 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
1946 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
1947 void av_resample_close(struct AVResampleContext *c);
1948
1949 /* YUV420 format is assumed ! */
1950
1951 struct ImgReSampleContext;
1952
1953 typedef struct ImgReSampleContext ImgReSampleContext;
1954
1955 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1956 int input_width, int input_height);
1957
1958 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1959 int iwidth, int iheight,
1960 int topBand, int bottomBand,
1961 int leftBand, int rightBand,
1962 int padtop, int padbottom,
1963 int padleft, int padright);
1964
1965
1966 void img_resample(ImgReSampleContext *s,
1967 AVPicture *output, const AVPicture *input);
1968
1969 void img_resample_close(ImgReSampleContext *s);
1970
1971 /**
1972 * Allocate memory for a picture. Call avpicture_free to free it.
1973 *
1974 * @param picture the picture to be filled in.
1975 * @param pix_fmt the format of the picture.
1976 * @param width the width of the picture.
1977 * @param height the height of the picture.
1978 * @return 0 if successful, -1 if not.
1979 */
1980 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1981
1982 /* Free a picture previously allocated by avpicture_alloc. */
1983 void avpicture_free(AVPicture *picture);
1984
1985 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1986 int pix_fmt, int width, int height);
1987 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1988 unsigned char *dest, int dest_size);
1989 int avpicture_get_size(int pix_fmt, int width, int height);
1990 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1991 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1992 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
1993 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1994
1995 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1996 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1997 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1998 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1999 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2000 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2001
2002 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2003 int has_alpha);
2004 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2005 int has_alpha, int *loss_ptr);
2006
2007 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2008 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2009 int img_get_alpha_info(const AVPicture *src,
2010 int pix_fmt, int width, int height);
2011
2012 /* convert among pixel formats */
2013 int img_convert(AVPicture *dst, int dst_pix_fmt,
2014 const AVPicture *src, int pix_fmt,
2015 int width, int height);
2016
2017 /* deinterlace a picture */
2018 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2019 int pix_fmt, int width, int height);
2020
2021 /* external high level API */
2022
2023 extern AVCodec *first_avcodec;
2024
2025 /* returns LIBAVCODEC_VERSION_INT constant */
2026 unsigned avcodec_version(void);
2027 /* returns LIBAVCODEC_BUILD constant */
2028 unsigned avcodec_build(void);
2029 void avcodec_init(void);
2030
2031 void register_avcodec(AVCodec *format);
2032 AVCodec *avcodec_find_encoder(enum CodecID id);
2033 AVCodec *avcodec_find_encoder_by_name(const char *name);
2034 AVCodec *avcodec_find_decoder(enum CodecID id);
2035 AVCodec *avcodec_find_decoder_by_name(const char *name);
2036 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2037
2038 void avcodec_get_context_defaults(AVCodecContext *s);
2039 AVCodecContext *avcodec_alloc_context(void);
2040 void avcodec_get_frame_defaults(AVFrame *pic);
2041 AVFrame *avcodec_alloc_frame(void);
2042
2043 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2044 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2045 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2046 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2047 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2048
2049 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2050 void avcodec_thread_free(AVCodecContext *s);
2051 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2052 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2053 //FIXME func typedef
2054
2055 /**
2056 * opens / inits the AVCodecContext.
2057 * not thread save!
2058 */
2059 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2060
2061 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2062 int *frame_size_ptr,
2063 uint8_t *buf, int buf_size);
2064 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2065 int *got_picture_ptr,
2066 uint8_t *buf, int buf_size);
2067 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2068 int *data_size_ptr,
2069 uint8_t *buf, int buf_size);
2070 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2071 const short *samples);
2072 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2073 const AVFrame *pict);
2074
2075 int avcodec_close(AVCodecContext *avctx);
2076
2077 void avcodec_register_all(void);
2078
2079 void avcodec_flush_buffers(AVCodecContext *avctx);
2080
2081 /* misc usefull functions */
2082
2083 /**
2084 * returns a single letter to describe the picture type
2085 */
2086 char av_get_pict_type_char(int pict_type);
2087
2088 /**
2089 * reduce a fraction.
2090 * this is usefull for framerate calculations
2091 * @param max the maximum allowed for dst_nom & dst_den
2092 * @return 1 if exact, 0 otherwise
2093 */
2094 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2095
2096 /**
2097 * rescale a 64bit integer with rounding to nearest.
2098 * a simple a*b/c isnt possible as it can overflow
2099 */
2100 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2101
2102 /**
2103 * rescale a 64bit integer with specified rounding.
2104 * a simple a*b/c isnt possible as it can overflow
2105 */
2106 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
2107
2108 /* frame parsing */
2109 typedef struct AVCodecParserContext {
2110 void *priv_data;
2111 struct AVCodecParser *parser;
2112 int64_t frame_offset; /* offset of the current frame */
2113 int64_t cur_offset; /* current offset
2114 (incremented by each av_parser_parse()) */
2115 int64_t last_frame_offset; /* offset of the last frame */
2116 /* video info */
2117 int pict_type; /* XXX: put it back in AVCodecContext */
2118 int repeat_pict; /* XXX: put it back in AVCodecContext */
2119 int64_t pts; /* pts of the current frame */
2120 int64_t dts; /* dts of the current frame */
2121
2122 /* private data */
2123 int64_t last_pts;
2124 int64_t last_dts;
2125 int fetch_timestamp;
2126
2127 #define AV_PARSER_PTS_NB 4
2128 int cur_frame_start_index;
2129 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2130 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2131 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2132 } AVCodecParserContext;
2133
2134 typedef struct AVCodecParser {
2135 int codec_ids[3]; /* several codec IDs are permitted */
2136 int priv_data_size;
2137 int (*parser_init)(AVCodecParserContext *s);
2138 int (*parser_parse)(AVCodecParserContext *s,
2139 AVCodecContext *avctx,
2140 uint8_t **poutbuf, int *poutbuf_size,
2141 const uint8_t *buf, int buf_size);
2142 void (*parser_close)(AVCodecParserContext *s);
2143 struct AVCodecParser *next;
2144 } AVCodecParser;
2145
2146 extern AVCodecParser *av_first_parser;
2147
2148 void av_register_codec_parser(AVCodecParser *parser);
2149 AVCodecParserContext *av_parser_init(int codec_id);
2150 int av_parser_parse(AVCodecParserContext *s,
2151 AVCodecContext *avctx,
2152 uint8_t **poutbuf, int *poutbuf_size,
2153 const uint8_t *buf, int buf_size,
2154 int64_t pts, int64_t dts);
2155 void av_parser_close(AVCodecParserContext *s);
2156
2157 extern AVCodecParser mpegvideo_parser;
2158 extern AVCodecParser mpeg4video_parser;
2159 extern AVCodecParser h261_parser;
2160 extern AVCodecParser h263_parser;
2161 extern AVCodecParser h264_parser;
2162 extern AVCodecParser mpegaudio_parser;
2163 extern AVCodecParser ac3_parser;
2164
2165 /* memory */
2166 void *av_malloc(unsigned int size);
2167 void *av_mallocz(unsigned int size);
2168 void *av_realloc(void *ptr, unsigned int size);
2169 void av_free(void *ptr);
2170 char *av_strdup(const char *s);
2171 void av_freep(void *ptr);
2172 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2173 /* for static data only */
2174 /* call av_free_static to release all staticaly allocated tables */
2175 void av_free_static(void);
2176 void *av_mallocz_static(unsigned int size);
2177
2178 /* add by bero : in adx.c */
2179 int is_adx(const unsigned char *buf,size_t bufsize);
2180
2181 void img_copy(AVPicture *dst, const AVPicture *src,
2182 int pix_fmt, int width, int height);
2183
2184 /* av_log API */
2185
2186 #include <stdarg.h>
2187
2188 #define AV_LOG_QUIET -1
2189 #define AV_LOG_ERROR 0
2190 #define AV_LOG_INFO 1
2191 #define AV_LOG_DEBUG 2
2192
2193 #ifdef __GNUC__
2194 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2195 #else
2196 extern void av_log(void*, int level, const char *fmt, ...);
2197 #endif
2198
2199 extern void av_vlog(void*, int level, const char *fmt, va_list);
2200 extern int av_log_get_level(void);
2201 extern void av_log_set_level(int);
2202 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2203
2204 /* endian macros */
2205 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2206 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2207 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2208 (((uint8_t*)(x))[1] << 16) | \
2209 (((uint8_t*)(x))[2] << 8) | \
2210 ((uint8_t*)(x))[3])
2211 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2212 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2213 (((uint8_t*)(x))[2] << 16) | \
2214 (((uint8_t*)(x))[1] << 8) | \
2215 ((uint8_t*)(x))[0])
2216 #endif
2217
2218 #ifdef __cplusplus
2219 }
2220 #endif
2221
2222 #endif /* AVCODEC_H */