17477032ba23fa2b7d2251aaaf5269c942f772af
[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 4724
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
107 /* various pcm "codecs" */
108 CODEC_ID_PCM_S16LE,
109 CODEC_ID_PCM_S16BE,
110 CODEC_ID_PCM_U16LE,
111 CODEC_ID_PCM_U16BE,
112 CODEC_ID_PCM_S8,
113 CODEC_ID_PCM_U8,
114 CODEC_ID_PCM_MULAW,
115 CODEC_ID_PCM_ALAW,
116
117 /* various adpcm codecs */
118 CODEC_ID_ADPCM_IMA_QT,
119 CODEC_ID_ADPCM_IMA_WAV,
120 CODEC_ID_ADPCM_IMA_DK3,
121 CODEC_ID_ADPCM_IMA_DK4,
122 CODEC_ID_ADPCM_IMA_WS,
123 CODEC_ID_ADPCM_IMA_SMJPEG,
124 CODEC_ID_ADPCM_MS,
125 CODEC_ID_ADPCM_4XM,
126 CODEC_ID_ADPCM_XA,
127 CODEC_ID_ADPCM_ADX,
128 CODEC_ID_ADPCM_EA,
129 CODEC_ID_ADPCM_G726,
130
131 /* AMR */
132 CODEC_ID_AMR_NB,
133 CODEC_ID_AMR_WB,
134
135 /* RealAudio codecs*/
136 CODEC_ID_RA_144,
137 CODEC_ID_RA_288,
138
139 /* various DPCM codecs */
140 CODEC_ID_ROQ_DPCM,
141 CODEC_ID_INTERPLAY_DPCM,
142 CODEC_ID_XAN_DPCM,
143
144 CODEC_ID_FLAC,
145
146 CODEC_ID_MPEG2TS, /* _FAKE_ codec to indicate a raw MPEG2 transport
147 stream (only used by libavformat) */
148
149 CODEC_ID_DTS,
150 CODEC_ID_XVID,
151 };
152
153 /* CODEC_ID_MP3LAME is absolete */
154 #define CODEC_ID_MP3LAME CODEC_ID_MP3
155
156 enum CodecType {
157 CODEC_TYPE_UNKNOWN = -1,
158 CODEC_TYPE_VIDEO,
159 CODEC_TYPE_AUDIO,
160 CODEC_TYPE_DATA,
161 };
162
163 /**
164 * Pixel format. Notes:
165 *
166 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
167 * color is put together as:
168 * (A << 24) | (R << 16) | (G << 8) | B
169 * This is stored as BGRA on little endian CPU architectures and ARGB on
170 * big endian CPUs.
171 *
172 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
173 * image data is stored in AVFrame.data[0]. The palette is transported in
174 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
175 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
176 * also endian-specific). Note also that the individual RGB palette
177 * components stored in AVFrame.data[1] should be in the range 0..255.
178 * This is important as many custom PAL8 video codecs that were designed
179 * to run on the IBM VGA graphics adapter use 6-bit palette components.
180 */
181 enum PixelFormat {
182 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
183 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
184 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
185 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
186 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
187 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
188 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
189 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
190 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
191 PIX_FMT_RGB565, ///< always stored in cpu endianness
192 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
193 PIX_FMT_GRAY8,
194 PIX_FMT_MONOWHITE, ///< 0 is white
195 PIX_FMT_MONOBLACK, ///< 0 is black
196 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
197 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
198 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
199 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
200 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
201 PIX_FMT_XVMC_MPEG2_IDCT,
202 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
203 PIX_FMT_NB,
204 };
205
206 /* currently unused, may be used if 24/32 bits samples ever supported */
207 enum SampleFormat {
208 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
209 };
210
211 /* in bytes */
212 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
213
214 /**
215 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
216 * this is mainly needed because some optimized bitstream readers read
217 * 32 or 64 bit at once and could read over the end<br>
218 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
219 * MPEG bitstreams could cause overread and segfault
220 */
221 #define FF_INPUT_BUFFER_PADDING_SIZE 8
222
223 /* motion estimation type, EPZS by default */
224 enum Motion_Est_ID {
225 ME_ZERO = 1,
226 ME_FULL,
227 ME_LOG,
228 ME_PHODS,
229 ME_EPZS,
230 ME_X1
231 };
232
233 enum AVRounding {
234 AV_ROUND_ZERO = 0, ///< round toward zero
235 AV_ROUND_INF = 1, ///< round away from zero
236 AV_ROUND_DOWN = 2, ///< round toward -infinity
237 AV_ROUND_UP = 3, ///< round toward +infinity
238 AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
239 };
240
241 typedef struct RcOverride{
242 int start_frame;
243 int end_frame;
244 int qscale; // if this is 0 then quality_factor will be used instead
245 float quality_factor;
246 } RcOverride;
247
248 /* only for ME compatiblity with old apps */
249 extern int motion_estimation_method;
250
251 #define FF_MAX_B_FRAMES 8
252
253 /* encoding support
254 these flags can be passed in AVCodecContext.flags before initing
255 Note: note not everything is supported yet
256 */
257
258 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
259 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
260 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
261 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
262 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
263 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
264 /* parent program gurantees that the input for b-frame containing streams is not written to
265 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
266 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
267 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
268 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
269 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
270 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
271 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
272 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
273 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
274 of only at frame boundaries */
275 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
276 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
277 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
278 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
279 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
280 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
281 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
282 /* Fx : Flag for h263+ extra options */
283 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
284 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
285 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
286 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
287 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
288 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
289 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
290 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
291 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
292 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
293 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
294 #define CODEC_FLAG_CLOSED_GOP 0x80000000
295 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
296
297 /* Unsupported options :
298 * Syntax Arithmetic coding (SAC)
299 * Reference Picture Selection
300 * Independant Segment Decoding */
301 /* /Fx */
302 /* codec capabilities */
303
304 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
305 /**
306 * Codec uses get_buffer() for allocating buffers.
307 * direct rendering method 1
308 */
309 #define CODEC_CAP_DR1 0x0002
310 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
311 used */
312 #define CODEC_CAP_PARSE_ONLY 0x0004
313 #define CODEC_CAP_TRUNCATED 0x0008
314 /* codec can export data for HW decoding (XvMC) */
315 #define CODEC_CAP_HWACCEL 0x0010
316 /** codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data */
317 #define CODEC_CAP_DELAY 0x0020
318
319 //the following defines might change, so dont expect compatibility if u use them
320 #define MB_TYPE_INTRA4x4 0x0001
321 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
322 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
323 #define MB_TYPE_16x16 0x0008
324 #define MB_TYPE_16x8 0x0010
325 #define MB_TYPE_8x16 0x0020
326 #define MB_TYPE_8x8 0x0040
327 #define MB_TYPE_INTERLACED 0x0080
328 #define MB_TYPE_DIRECT2 0x0100 //FIXME
329 #define MB_TYPE_ACPRED 0x0200
330 #define MB_TYPE_GMC 0x0400
331 #define MB_TYPE_SKIP 0x0800
332 #define MB_TYPE_P0L0 0x1000
333 #define MB_TYPE_P1L0 0x2000
334 #define MB_TYPE_P0L1 0x4000
335 #define MB_TYPE_P1L1 0x8000
336 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
337 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
338 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
339 #define MB_TYPE_QUANT 0x00010000
340 #define MB_TYPE_CBP 0x00020000
341 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
342
343 /**
344 * Pan Scan area.
345 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
346 */
347 typedef struct AVPanScan{
348 /**
349 * id.
350 * - encoding: set by user.
351 * - decoding: set by lavc
352 */
353 int id;
354
355 /**
356 * width and height in 1/16 pel
357 * - encoding: set by user.
358 * - decoding: set by lavc
359 */
360 int width;
361 int height;
362
363 /**
364 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
365 * - encoding: set by user.
366 * - decoding: set by lavc
367 */
368 int16_t position[3][2];
369 }AVPanScan;
370
371 #define FF_COMMON_FRAME \
372 /**\
373 * pointer to the picture planes.\
374 * this might be different from the first allocated byte\
375 * - encoding: \
376 * - decoding: \
377 */\
378 uint8_t *data[4];\
379 int linesize[4];\
380 /**\
381 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
382 * this isnt used by lavc unless the default get/release_buffer() is used\
383 * - encoding: \
384 * - decoding: \
385 */\
386 uint8_t *base[4];\
387 /**\
388 * 1 -> keyframe, 0-> not\
389 * - encoding: set by lavc\
390 * - decoding: set by lavc\
391 */\
392 int key_frame;\
393 \
394 /**\
395 * picture type of the frame, see ?_TYPE below.\
396 * - encoding: set by lavc for coded_picture (and set by user for input)\
397 * - decoding: set by lavc\
398 */\
399 int pict_type;\
400 \
401 /**\
402 * presentation timestamp in AV_TIME_BASE (=micro seconds currently) (time when frame should be shown to user)\
403 * if AV_NOPTS_VALUE then the frame_rate will be used as reference\
404 * - encoding: MUST be set by user\
405 * - decoding: set by lavc\
406 */\
407 int64_t pts;\
408 \
409 /**\
410 * picture number in bitstream order.\
411 * - encoding: set by\
412 * - decoding: set by lavc\
413 */\
414 int coded_picture_number;\
415 /**\
416 * picture number in display order.\
417 * - encoding: set by\
418 * - decoding: set by lavc\
419 */\
420 int display_picture_number;\
421 \
422 /**\
423 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
424 * - encoding: set by lavc for coded_picture (and set by user for input)\
425 * - decoding: set by lavc\
426 */\
427 int quality; \
428 \
429 /**\
430 * buffer age (1->was last buffer and dint change, 2->..., ...).\
431 * set to INT_MAX if the buffer has not been used yet \
432 * - encoding: unused\
433 * - decoding: MUST be set by get_buffer()\
434 */\
435 int age;\
436 \
437 /**\
438 * is this picture used as reference\
439 * - encoding: unused\
440 * - decoding: set by lavc (before get_buffer() call))\
441 */\
442 int reference;\
443 \
444 /**\
445 * QP table\
446 * - encoding: unused\
447 * - decoding: set by lavc\
448 */\
449 int8_t *qscale_table;\
450 /**\
451 * QP store stride\
452 * - encoding: unused\
453 * - decoding: set by lavc\
454 */\
455 int qstride;\
456 \
457 /**\
458 * mbskip_table[mb]>=1 if MB didnt change\
459 * stride= mb_width = (width+15)>>4\
460 * - encoding: unused\
461 * - decoding: set by lavc\
462 */\
463 uint8_t *mbskip_table;\
464 \
465 /**\
466 * Motion vector table\
467 * - encoding: set by user\
468 * - decoding: set by lavc\
469 */\
470 int16_t (*motion_val[2])[2];\
471 \
472 /**\
473 * Macroblock type table\
474 * mb_type_base + mb_width + 2\
475 * - encoding: set by user\
476 * - decoding: set by lavc\
477 */\
478 uint32_t *mb_type;\
479 \
480 /**\
481 * Macroblock size: (0->16x16, 1->8x8, 2-> 4x4, 3-> 2x2)\
482 * - encoding: unused\
483 * - decoding: set by lavc\
484 */\
485 uint8_t motion_subsample_log2;\
486 \
487 /**\
488 * for some private data of the user\
489 * - encoding: unused\
490 * - decoding: set by user\
491 */\
492 void *opaque;\
493 \
494 /**\
495 * error\
496 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
497 * - decoding: unused\
498 */\
499 uint64_t error[4];\
500 \
501 /**\
502 * type of the buffer (to keep track of who has to dealloc data[*])\
503 * - encoding: set by the one who allocs it\
504 * - decoding: set by the one who allocs it\
505 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
506 */\
507 int type;\
508 \
509 /**\
510 * when decoding, this signal how much the picture must be delayed.\
511 * extra_delay = repeat_pict / (2*fps)\
512 * - encoding: unused\
513 * - decoding: set by lavc\
514 */\
515 int repeat_pict;\
516 \
517 /**\
518 * \
519 */\
520 int qscale_type;\
521 \
522 /**\
523 * The content of the picture is interlaced.\
524 * - encoding: set by user\
525 * - decoding: set by lavc (default 0)\
526 */\
527 int interlaced_frame;\
528 \
529 /**\
530 * if the content is interlaced, is top field displayed first.\
531 * - encoding: set by user\
532 * - decoding: set by lavc\
533 */\
534 int top_field_first;\
535 \
536 /**\
537 * Pan scan.\
538 * - encoding: set by user\
539 * - decoding: set by lavc\
540 */\
541 AVPanScan *pan_scan;\
542 \
543 /**\
544 * tell user application that palette has changed from previous frame.\
545 * - encoding: ??? (no palette-enabled encoder yet)\
546 * - decoding: set by lavc (default 0)\
547 */\
548 int palette_has_changed;\
549 \
550 /**\
551 * Codec suggestion on buffer type if != 0\
552 * - encoding: unused\
553 * - decoding: set by lavc (before get_buffer() call))\
554 */\
555 int buffer_hints;\
556 \
557 /**\
558 * DCT coeffitients\
559 * - encoding: unused\
560 * - decoding: set by lavc\
561 */\
562 short *dct_coeff;\
563 \
564 /**\
565 * Motion referece frame index\
566 * - encoding: set by user\
567 * - decoding: set by lavc\
568 */\
569 int8_t *ref_index[2];
570
571 #define FF_QSCALE_TYPE_MPEG1 0
572 #define FF_QSCALE_TYPE_MPEG2 1
573
574 #define FF_BUFFER_TYPE_INTERNAL 1
575 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
576 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
577 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
578
579
580 #define FF_I_TYPE 1 // Intra
581 #define FF_P_TYPE 2 // Predicted
582 #define FF_B_TYPE 3 // Bi-dir predicted
583 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
584 #define FF_SI_TYPE 5
585 #define FF_SP_TYPE 6
586
587 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
588 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
589 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
590 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
591
592 /**
593 * Audio Video Frame.
594 */
595 typedef struct AVFrame {
596 FF_COMMON_FRAME
597 } AVFrame;
598
599 #define DEFAULT_FRAME_RATE_BASE 1001000
600
601 /**
602 * Used by av_log
603 */
604 typedef struct AVCLASS AVClass;
605 struct AVCLASS {
606 const char* class_name;
607 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
608 or AVFormatContext, which begin with an AVClass.
609 Needed because av_log is in libavcodec and has no visibility
610 of AVIn/OutputFormat */
611 };
612
613 /**
614 * main external api structure.
615 */
616 typedef struct AVCodecContext {
617 /**
618 * Info on struct for av_log
619 * - set by avcodec_alloc_context
620 */
621 AVClass *av_class;
622 /**
623 * the average bitrate.
624 * - encoding: set by user. unused for constant quantizer encoding
625 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
626 */
627 int bit_rate;
628
629 /**
630 * number of bits the bitstream is allowed to diverge from the reference.
631 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
632 * - encoding: set by user. unused for constant quantizer encoding
633 * - decoding: unused
634 */
635 int bit_rate_tolerance;
636
637 /**
638 * CODEC_FLAG_*.
639 * - encoding: set by user.
640 * - decoding: set by user.
641 */
642 int flags;
643
644 /**
645 * some codecs needs additionnal format info. It is stored here
646 * - encoding: set by user.
647 * - decoding: set by lavc. (FIXME is this ok?)
648 */
649 int sub_id;
650
651 /**
652 * motion estimation algorithm used for video coding.
653 * - encoding: MUST be set by user.
654 * - decoding: unused
655 */
656 int me_method;
657
658 /**
659 * some codecs need / can use extra-data like huffman tables.
660 * mjpeg: huffman tables
661 * rv10: additional flags
662 * mpeg4: global headers (they can be in the bitstream or here)
663 * - encoding: set/allocated/freed by lavc.
664 * - decoding: set/allocated/freed by user.
665 */
666 void *extradata;
667 int extradata_size;
668
669 /* video only */
670 /**
671 * frames per sec multiplied by frame_rate_base.
672 * for variable fps this is the precission, so if the timestamps
673 * can be specified in msec precssion then this is 1000*frame_rate_base
674 * - encoding: MUST be set by user
675 * - decoding: set by lavc. 0 or the frame_rate if available
676 */
677 int frame_rate;
678
679 /**
680 * width / height.
681 * - encoding: MUST be set by user.
682 * - decoding: set by user if known, codec should override / dynamically change if needed
683 */
684 int width, height;
685
686 #define FF_ASPECT_EXTENDED 15
687
688 /**
689 * the number of pictures in a group of pitures, or 0 for intra_only.
690 * - encoding: set by user.
691 * - decoding: unused
692 */
693 int gop_size;
694
695 /**
696 * pixel format, see PIX_FMT_xxx.
697 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
698 * conversion is in order. This only works for
699 * codecs with one supported pix_fmt, we should
700 * do something for a generic case as well.
701 * - decoding: set by lavc.
702 */
703 enum PixelFormat pix_fmt;
704
705 /**
706 * Frame rate emulation. If not zero lower layer (i.e. format handler)
707 * has to read frames at native frame rate.
708 * - encoding: set by user.
709 * - decoding: unused.
710 */
711 int rate_emu;
712
713 /**
714 * if non NULL, 'draw_horiz_band' is called by the libavcodec
715 * decoder to draw an horizontal band. It improve cache usage. Not
716 * all codecs can do that. You must check the codec capabilities
717 * before
718 * - encoding: unused
719 * - decoding: set by user.
720 * @param height the height of the slice
721 * @param y the y position of the slice
722 * @param type 1->top field, 2->bottom field, 3->frame
723 * @param offset offset into the AVFrame.data from which the slice should be read
724 */
725 void (*draw_horiz_band)(struct AVCodecContext *s,
726 const AVFrame *src, int offset[4],
727 int y, int type, int height);
728
729 /* audio only */
730 int sample_rate; ///< samples per sec
731 int channels;
732 int sample_fmt; ///< sample format, currenly unused
733
734 /* the following data should not be initialized */
735 int frame_size; ///< in samples, initialized when calling 'init'
736 int frame_number; ///< audio or video frame number
737 int real_pict_num; ///< returns the real picture number of previous encoded frame
738
739 /**
740 * number of frames the decoded output will be delayed relative to
741 * the encoded input.
742 * - encoding: set by lavc.
743 * - decoding: unused
744 */
745 int delay;
746
747 /* - encoding parameters */
748 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
749 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
750
751 /**
752 * minimum quantizer.
753 * - encoding: set by user.
754 * - decoding: unused
755 */
756 int qmin;
757
758 /**
759 * maximum quantizer.
760 * - encoding: set by user.
761 * - decoding: unused
762 */
763 int qmax;
764
765 /**
766 * maximum quantizer difference etween frames.
767 * - encoding: set by user.
768 * - decoding: unused
769 */
770 int max_qdiff;
771
772 /**
773 * maximum number of b frames between non b frames.
774 * note: the output will be delayed by max_b_frames+1 relative to the input
775 * - encoding: set by user.
776 * - decoding: unused
777 */
778 int max_b_frames;
779
780 /**
781 * qscale factor between ip and b frames.
782 * - encoding: set by user.
783 * - decoding: unused
784 */
785 float b_quant_factor;
786
787 /** obsolete FIXME remove */
788 int rc_strategy;
789 int b_frame_strategy;
790
791 /**
792 * hurry up amount.
793 * - encoding: unused
794 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
795 */
796 int hurry_up;
797
798 struct AVCodec *codec;
799
800 void *priv_data;
801
802 /* unused, FIXME remove*/
803 int rtp_mode;
804
805 int rtp_payload_size; /* The size of the RTP payload, the coder will */
806 /* do it's best to deliver a chunk with size */
807 /* below rtp_payload_size, the chunk will start */
808 /* with a start code on some codecs like H.263 */
809 /* This doesn't take account of any particular */
810 /* headers inside the transmited RTP payload */
811
812
813 /* The RTP callcack: This function is called */
814 /* every time the encoder as a packet to send */
815 /* Depends on the encoder if the data starts */
816 /* with a Start Code (it should) H.263 does */
817 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int packet_number);
818
819 /* statistics, used for 2-pass encoding */
820 int mv_bits;
821 int header_bits;
822 int i_tex_bits;
823 int p_tex_bits;
824 int i_count;
825 int p_count;
826 int skip_count;
827 int misc_bits;
828
829 /**
830 * number of bits used for the previously encoded frame.
831 * - encoding: set by lavc
832 * - decoding: unused
833 */
834 int frame_bits;
835
836 /**
837 * private data of the user, can be used to carry app specific stuff.
838 * - encoding: set by user
839 * - decoding: set by user
840 */
841 void *opaque;
842
843 char codec_name[32];
844 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
845 enum CodecID codec_id; /* see CODEC_ID_xxx */
846
847 /**
848 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
849 * this is used to workaround some encoder bugs
850 * - encoding: set by user, if not then the default based on codec_id will be used
851 * - decoding: set by user, will be converted to upper case by lavc during init
852 */
853 unsigned int codec_tag;
854
855 /**
856 * workaround bugs in encoders which sometimes cannot be detected automatically.
857 * - encoding: unused
858 * - decoding: set by user
859 */
860 int workaround_bugs;
861 #define FF_BUG_AUTODETECT 1 ///< autodetection
862 #define FF_BUG_OLD_MSMPEG4 2
863 #define FF_BUG_XVID_ILACE 4
864 #define FF_BUG_UMP4 8
865 #define FF_BUG_NO_PADDING 16
866 #define FF_BUG_AMV 32
867 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
868 #define FF_BUG_QPEL_CHROMA 64
869 #define FF_BUG_STD_QPEL 128
870 #define FF_BUG_QPEL_CHROMA2 256
871 #define FF_BUG_DIRECT_BLOCKSIZE 512
872 #define FF_BUG_EDGE 1024
873 #define FF_BUG_HPEL_CHROMA 2048
874 #define FF_BUG_DC_CLIP 4096
875 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
876
877 /**
878 * luma single coeff elimination threshold.
879 * - encoding: set by user
880 * - decoding: unused
881 */
882 int luma_elim_threshold;
883
884 /**
885 * chroma single coeff elimination threshold.
886 * - encoding: set by user
887 * - decoding: unused
888 */
889 int chroma_elim_threshold;
890
891 /**
892 * strictly follow the std (MPEG4, ...).
893 * - encoding: set by user
894 * - decoding: unused
895 */
896 int strict_std_compliance;
897
898 /**
899 * qscale offset between ip and b frames.
900 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
901 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
902 * - encoding: set by user.
903 * - decoding: unused
904 */
905 float b_quant_offset;
906
907 /**
908 * error resilience higher values will detect more errors but may missdetect
909 * some more or less valid parts as errors.
910 * - encoding: unused
911 * - decoding: set by user
912 */
913 int error_resilience;
914 #define FF_ER_CAREFULL 1
915 #define FF_ER_COMPLIANT 2
916 #define FF_ER_AGGRESSIVE 3
917 #define FF_ER_VERY_AGGRESSIVE 4
918
919 /**
920 * called at the beginning of each frame to get a buffer for it.
921 * if pic.reference is set then the frame will be read later by lavc
922 * avcodec_align_dimensions() should be used to find the required width and
923 * height, as they normally need to be rounded up to the next multiple of 16
924 * - encoding: unused
925 * - decoding: set by lavc, user can override
926 */
927 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
928
929 /**
930 * called to release buffers which where allocated with get_buffer.
931 * a released buffer can be reused in get_buffer()
932 * pic.data[*] must be set to NULL
933 * - encoding: unused
934 * - decoding: set by lavc, user can override
935 */
936 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
937
938 /**
939 * if 1 the stream has a 1 frame delay during decoding.
940 * - encoding: set by lavc
941 * - decoding: set by lavc
942 */
943 int has_b_frames;
944
945 int block_align; ///< used by some WAV based audio codecs
946
947 int parse_only; /* - decoding only: if true, only parsing is done
948 (function avcodec_parse_frame()). The frame
949 data is returned. Only MPEG codecs support this now. */
950
951 /**
952 * 0-> h263 quant 1-> mpeg quant.
953 * - encoding: set by user.
954 * - decoding: unused
955 */
956 int mpeg_quant;
957
958 /**
959 * pass1 encoding statistics output buffer.
960 * - encoding: set by lavc
961 * - decoding: unused
962 */
963 char *stats_out;
964
965 /**
966 * pass2 encoding statistics input buffer.
967 * concatenated stuff from stats_out of pass1 should be placed here
968 * - encoding: allocated/set/freed by user
969 * - decoding: unused
970 */
971 char *stats_in;
972
973 /**
974 * ratecontrol qmin qmax limiting method.
975 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
976 * - encoding: set by user.
977 * - decoding: unused
978 */
979 float rc_qsquish;
980
981 float rc_qmod_amp;
982 int rc_qmod_freq;
983
984 /**
985 * ratecontrol override, see RcOverride.
986 * - encoding: allocated/set/freed by user.
987 * - decoding: unused
988 */
989 RcOverride *rc_override;
990 int rc_override_count;
991
992 /**
993 * rate control equation.
994 * - encoding: set by user
995 * - decoding: unused
996 */
997 char *rc_eq;
998
999 /**
1000 * maximum bitrate.
1001 * - encoding: set by user.
1002 * - decoding: unused
1003 */
1004 int rc_max_rate;
1005
1006 /**
1007 * minimum bitrate.
1008 * - encoding: set by user.
1009 * - decoding: unused
1010 */
1011 int rc_min_rate;
1012
1013 /**
1014 * decoder bitstream buffer size.
1015 * - encoding: set by user.
1016 * - decoding: unused
1017 */
1018 int rc_buffer_size;
1019 float rc_buffer_aggressivity;
1020
1021 /**
1022 * qscale factor between p and i frames.
1023 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1024 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1025 * - encoding: set by user.
1026 * - decoding: unused
1027 */
1028 float i_quant_factor;
1029
1030 /**
1031 * qscale offset between p and i frames.
1032 * - encoding: set by user.
1033 * - decoding: unused
1034 */
1035 float i_quant_offset;
1036
1037 /**
1038 * initial complexity for pass1 ratecontrol.
1039 * - encoding: set by user.
1040 * - decoding: unused
1041 */
1042 float rc_initial_cplx;
1043
1044 /**
1045 * dct algorithm, see FF_DCT_* below.
1046 * - encoding: set by user
1047 * - decoding: unused
1048 */
1049 int dct_algo;
1050 #define FF_DCT_AUTO 0
1051 #define FF_DCT_FASTINT 1
1052 #define FF_DCT_INT 2
1053 #define FF_DCT_MMX 3
1054 #define FF_DCT_MLIB 4
1055 #define FF_DCT_ALTIVEC 5
1056 #define FF_DCT_FAAN 6
1057
1058 /**
1059 * luminance masking (0-> disabled).
1060 * - encoding: set by user
1061 * - decoding: unused
1062 */
1063 float lumi_masking;
1064
1065 /**
1066 * temporary complexity masking (0-> disabled).
1067 * - encoding: set by user
1068 * - decoding: unused
1069 */
1070 float temporal_cplx_masking;
1071
1072 /**
1073 * spatial complexity masking (0-> disabled).
1074 * - encoding: set by user
1075 * - decoding: unused
1076 */
1077 float spatial_cplx_masking;
1078
1079 /**
1080 * p block masking (0-> disabled).
1081 * - encoding: set by user
1082 * - decoding: unused
1083 */
1084 float p_masking;
1085
1086 /**
1087 * darkness masking (0-> disabled).
1088 * - encoding: set by user
1089 * - decoding: unused
1090 */
1091 float dark_masking;
1092
1093
1094 /* for binary compatibility */
1095 int unused;
1096
1097 /**
1098 * idct algorithm, see FF_IDCT_* below.
1099 * - encoding: set by user
1100 * - decoding: set by user
1101 */
1102 int idct_algo;
1103 #define FF_IDCT_AUTO 0
1104 #define FF_IDCT_INT 1
1105 #define FF_IDCT_SIMPLE 2
1106 #define FF_IDCT_SIMPLEMMX 3
1107 #define FF_IDCT_LIBMPEG2MMX 4
1108 #define FF_IDCT_PS2 5
1109 #define FF_IDCT_MLIB 6
1110 #define FF_IDCT_ARM 7
1111 #define FF_IDCT_ALTIVEC 8
1112 #define FF_IDCT_SH4 9
1113 #define FF_IDCT_SIMPLEARM 10
1114
1115 /**
1116 * slice count.
1117 * - encoding: set by lavc
1118 * - decoding: set by user (or 0)
1119 */
1120 int slice_count;
1121 /**
1122 * slice offsets in the frame in bytes.
1123 * - encoding: set/allocated by lavc
1124 * - decoding: set/allocated by user (or NULL)
1125 */
1126 int *slice_offset;
1127
1128 /**
1129 * error concealment flags.
1130 * - encoding: unused
1131 * - decoding: set by user
1132 */
1133 int error_concealment;
1134 #define FF_EC_GUESS_MVS 1
1135 #define FF_EC_DEBLOCK 2
1136
1137 /**
1138 * dsp_mask could be add used to disable unwanted CPU features
1139 * CPU features (i.e. MMX, SSE. ...)
1140 *
1141 * with FORCE flag you may instead enable given CPU features
1142 * (Dangerous: usable in case of misdetection, improper usage however will
1143 * result into program crash)
1144 */
1145 unsigned dsp_mask;
1146 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1147 /* lower 16 bits - CPU features */
1148 #ifdef HAVE_MMX
1149 #define FF_MM_MMX 0x0001 /* standard MMX */
1150 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1151 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1152 #define FF_MM_SSE 0x0008 /* SSE functions */
1153 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1154 #endif /* HAVE_MMX */
1155
1156 /**
1157 * bits per sample/pixel from the demuxer (needed for huffyuv).
1158 * - encoding: set by lavc
1159 * - decoding: set by user
1160 */
1161 int bits_per_sample;
1162
1163 /**
1164 * prediction method (needed for huffyuv).
1165 * - encoding: set by user
1166 * - decoding: unused
1167 */
1168 int prediction_method;
1169 #define FF_PRED_LEFT 0
1170 #define FF_PRED_PLANE 1
1171 #define FF_PRED_MEDIAN 2
1172
1173 /**
1174 * sample aspect ratio (0 if unknown).
1175 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1176 * - encoding: set by user.
1177 * - decoding: set by lavc.
1178 */
1179 AVRational sample_aspect_ratio;
1180
1181 /**
1182 * the picture in the bitstream.
1183 * - encoding: set by lavc
1184 * - decoding: set by lavc
1185 */
1186 AVFrame *coded_frame;
1187
1188 /**
1189 * debug.
1190 * - encoding: set by user.
1191 * - decoding: set by user.
1192 */
1193 int debug;
1194 #define FF_DEBUG_PICT_INFO 1
1195 #define FF_DEBUG_RC 2
1196 #define FF_DEBUG_BITSTREAM 4
1197 #define FF_DEBUG_MB_TYPE 8
1198 #define FF_DEBUG_QP 16
1199 #define FF_DEBUG_MV 32
1200 #define FF_DEBUG_DCT_COEFF 0x00000040
1201 #define FF_DEBUG_SKIP 0x00000080
1202 #define FF_DEBUG_STARTCODE 0x00000100
1203 #define FF_DEBUG_PTS 0x00000200
1204 #define FF_DEBUG_ER 0x00000400
1205 #define FF_DEBUG_MMCO 0x00000800
1206 #define FF_DEBUG_BUGS 0x00001000
1207 #define FF_DEBUG_VIS_QP 0x00002000
1208 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1209
1210 /**
1211 * debug.
1212 * - encoding: set by user.
1213 * - decoding: set by user.
1214 */
1215 int debug_mv;
1216 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1217 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1218 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1219
1220 /**
1221 * error.
1222 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1223 * - decoding: unused
1224 */
1225 uint64_t error[4];
1226
1227 /**
1228 * minimum MB quantizer.
1229 * - encoding: set by user.
1230 * - decoding: unused
1231 */
1232 int mb_qmin;
1233
1234 /**
1235 * maximum MB quantizer.
1236 * - encoding: set by user.
1237 * - decoding: unused
1238 */
1239 int mb_qmax;
1240
1241 /**
1242 * motion estimation compare function.
1243 * - encoding: set by user.
1244 * - decoding: unused
1245 */
1246 int me_cmp;
1247 /**
1248 * subpixel motion estimation compare function.
1249 * - encoding: set by user.
1250 * - decoding: unused
1251 */
1252 int me_sub_cmp;
1253 /**
1254 * macroblock compare function (not supported yet).
1255 * - encoding: set by user.
1256 * - decoding: unused
1257 */
1258 int mb_cmp;
1259 /**
1260 * interlaced dct compare function
1261 * - encoding: set by user.
1262 * - decoding: unused
1263 */
1264 int ildct_cmp;
1265 #define FF_CMP_SAD 0
1266 #define FF_CMP_SSE 1
1267 #define FF_CMP_SATD 2
1268 #define FF_CMP_DCT 3
1269 #define FF_CMP_PSNR 4
1270 #define FF_CMP_BIT 5
1271 #define FF_CMP_RD 6
1272 #define FF_CMP_ZERO 7
1273 #define FF_CMP_VSAD 8
1274 #define FF_CMP_VSSE 9
1275 #define FF_CMP_NSSE 10
1276 #define FF_CMP_W53 11
1277 #define FF_CMP_W97 12
1278 #define FF_CMP_CHROMA 256
1279
1280 /**
1281 * ME diamond size & shape.
1282 * - encoding: set by user.
1283 * - decoding: unused
1284 */
1285 int dia_size;
1286
1287 /**
1288 * amount of previous MV predictors (2a+1 x 2a+1 square).
1289 * - encoding: set by user.
1290 * - decoding: unused
1291 */
1292 int last_predictor_count;
1293
1294 /**
1295 * pre pass for motion estimation.
1296 * - encoding: set by user.
1297 * - decoding: unused
1298 */
1299 int pre_me;
1300
1301 /**
1302 * motion estimation pre pass compare function.
1303 * - encoding: set by user.
1304 * - decoding: unused
1305 */
1306 int me_pre_cmp;
1307
1308 /**
1309 * ME pre pass diamond size & shape.
1310 * - encoding: set by user.
1311 * - decoding: unused
1312 */
1313 int pre_dia_size;
1314
1315 /**
1316 * subpel ME quality.
1317 * - encoding: set by user.
1318 * - decoding: unused
1319 */
1320 int me_subpel_quality;
1321
1322 /**
1323 * callback to negotiate the pixelFormat.
1324 * @param fmt is the list of formats which are supported by the codec,
1325 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1326 * the first is allways the native one
1327 * @return the choosen format
1328 * - encoding: unused
1329 * - decoding: set by user, if not set then the native format will always be choosen
1330 */
1331 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1332
1333 /**
1334 * DTG active format information (additionnal aspect ratio
1335 * information only used in DVB MPEG2 transport streams). 0 if
1336 * not set.
1337 *
1338 * - encoding: unused.
1339 * - decoding: set by decoder
1340 */
1341 int dtg_active_format;
1342 #define FF_DTG_AFD_SAME 8
1343 #define FF_DTG_AFD_4_3 9
1344 #define FF_DTG_AFD_16_9 10
1345 #define FF_DTG_AFD_14_9 11
1346 #define FF_DTG_AFD_4_3_SP_14_9 13
1347 #define FF_DTG_AFD_16_9_SP_14_9 14
1348 #define FF_DTG_AFD_SP_4_3 15
1349
1350 /**
1351 * Maximum motion estimation search range in subpel units.
1352 * if 0 then no limit
1353 *
1354 * - encoding: set by user.
1355 * - decoding: unused.
1356 */
1357 int me_range;
1358
1359 /**
1360 * frame_rate_base.
1361 * for variable fps this is 1
1362 * - encoding: set by user.
1363 * - decoding: set by lavc.
1364 * @todo move this after frame_rate
1365 */
1366
1367 int frame_rate_base;
1368 /**
1369 * intra quantizer bias.
1370 * - encoding: set by user.
1371 * - decoding: unused
1372 */
1373 int intra_quant_bias;
1374 #define FF_DEFAULT_QUANT_BIAS 999999
1375
1376 /**
1377 * inter quantizer bias.
1378 * - encoding: set by user.
1379 * - decoding: unused
1380 */
1381 int inter_quant_bias;
1382
1383 /**
1384 * color table ID.
1385 * - encoding: unused.
1386 * - decoding: which clrtable should be used for 8bit RGB images
1387 * table have to be stored somewhere FIXME
1388 */
1389 int color_table_id;
1390
1391 /**
1392 * internal_buffer count.
1393 * Dont touch, used by lavc default_get_buffer()
1394 */
1395 int internal_buffer_count;
1396
1397 /**
1398 * internal_buffers.
1399 * Dont touch, used by lavc default_get_buffer()
1400 */
1401 void *internal_buffer;
1402
1403 #define FF_LAMBDA_SHIFT 7
1404 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1405 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1406 #define FF_LAMBDA_MAX (256*128-1)
1407
1408 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1409 /**
1410 * global quality for codecs which cannot change it per frame.
1411 * this should be proportional to MPEG1/2/4 qscale.
1412 * - encoding: set by user.
1413 * - decoding: unused
1414 */
1415 int global_quality;
1416
1417 #define FF_CODER_TYPE_VLC 0
1418 #define FF_CODER_TYPE_AC 1
1419 /**
1420 * coder type
1421 * - encoding: set by user.
1422 * - decoding: unused
1423 */
1424 int coder_type;
1425
1426 /**
1427 * context model
1428 * - encoding: set by user.
1429 * - decoding: unused
1430 */
1431 int context_model;
1432
1433 /**
1434 * slice flags
1435 * - encoding: unused
1436 * - decoding: set by user.
1437 */
1438 int slice_flags;
1439 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1440 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1441 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1442
1443 /**
1444 * XVideo Motion Acceleration
1445 * - encoding: forbidden
1446 * - decoding: set by decoder
1447 */
1448 int xvmc_acceleration;
1449
1450 /**
1451 * macroblock decision mode
1452 * - encoding: set by user.
1453 * - decoding: unused
1454 */
1455 int mb_decision;
1456 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1457 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1458 #define FF_MB_DECISION_RD 2 ///< rate distoration
1459
1460 /**
1461 * custom intra quantization matrix
1462 * - encoding: set by user, can be NULL
1463 * - decoding: set by lavc
1464 */
1465 uint16_t *intra_matrix;
1466
1467 /**
1468 * custom inter quantization matrix
1469 * - encoding: set by user, can be NULL
1470 * - decoding: set by lavc
1471 */
1472 uint16_t *inter_matrix;
1473
1474 /**
1475 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1476 * this is used to workaround some encoder bugs
1477 * - encoding: unused
1478 * - decoding: set by user, will be converted to upper case by lavc during init
1479 */
1480 unsigned int stream_codec_tag;
1481
1482 /**
1483 * scene change detection threshold.
1484 * 0 is default, larger means fewer detected scene changes
1485 * - encoding: set by user.
1486 * - decoding: unused
1487 */
1488 int scenechange_threshold;
1489
1490 /**
1491 * minimum lagrange multipler
1492 * - encoding: set by user.
1493 * - decoding: unused
1494 */
1495 int lmin;
1496
1497 /**
1498 * maximum lagrange multipler
1499 * - encoding: set by user.
1500 * - decoding: unused
1501 */
1502 int lmax;
1503
1504 /**
1505 * Palette control structure
1506 * - encoding: ??? (no palette-enabled encoder yet)
1507 * - decoding: set by user.
1508 */
1509 struct AVPaletteControl *palctrl;
1510
1511 /**
1512 * noise reduction strength
1513 * - encoding: set by user.
1514 * - decoding: unused
1515 */
1516 int noise_reduction;
1517
1518 /**
1519 * called at the beginning of a frame to get cr buffer for it.
1520 * buffer type (size, hints) must be the same. lavc won't check it.
1521 * lavc will pass previous buffer in pic, function should return
1522 * same buffer or new buffer with old frame "painted" into it.
1523 * if pic.data[0] == NULL must behave like get_buffer().
1524 * - encoding: unused
1525 * - decoding: set by lavc, user can override
1526 */
1527 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1528
1529 /**
1530 * number of bits which should be loaded into the rc buffer before decoding starts
1531 * - encoding: set by user.
1532 * - decoding: unused
1533 */
1534 int rc_initial_buffer_occupancy;
1535
1536 /**
1537 *
1538 * - encoding: set by user.
1539 * - decoding: unused
1540 */
1541 int inter_threshold;
1542
1543 /**
1544 * CODEC_FLAG2_*.
1545 * - encoding: set by user.
1546 * - decoding: set by user.
1547 */
1548 int flags2;
1549
1550 /**
1551 * simulates errors in the bitstream to test error concealment.
1552 * - encoding: set by user.
1553 * - decoding: unused.
1554 */
1555 int error_rate;
1556
1557 /**
1558 * MP3 antialias algorithm, see FF_AA_* below.
1559 * - encoding: unused
1560 * - decoding: set by user
1561 */
1562 int antialias_algo;
1563 #define FF_AA_AUTO 0
1564 #define FF_AA_FASTINT 1 //not implemented yet
1565 #define FF_AA_INT 2
1566 #define FF_AA_FLOAT 3
1567 /**
1568 * Quantizer noise shaping.
1569 * - encoding: set by user
1570 * - decoding: unused
1571 */
1572 int quantizer_noise_shaping;
1573
1574 /**
1575 * Thread count.
1576 * is used to decide how many independant tasks should be passed to execute()
1577 * - encoding: set by user
1578 * - decoding: set by user
1579 */
1580 int thread_count;
1581
1582 /**
1583 * the codec may call this to execute several independant things. it will return only after
1584 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1585 * default implementation will execute the parts serially
1586 * @param count the number of things to execute
1587 * - encoding: set by lavc, user can override
1588 * - decoding: set by lavc, user can override
1589 */
1590 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1591
1592 /**
1593 * Thread opaque.
1594 * can be used by execute() to store some per AVCodecContext stuff.
1595 * - encoding: set by execute()
1596 * - decoding: set by execute()
1597 */
1598 void *thread_opaque;
1599
1600 /**
1601 * Motion estimation threshold. under which no motion estimation is
1602 * performed, but instead the user specified motion vectors are used
1603 *
1604 * - encoding: set by user
1605 * - decoding: unused
1606 */
1607 int me_threshold;
1608
1609 /**
1610 * Macroblock threshold. under which the user specified macroblock types will be used
1611 * - encoding: set by user
1612 * - decoding: unused
1613 */
1614 int mb_threshold;
1615
1616 /**
1617 * precision of the intra dc coefficient - 8.
1618 * - encoding: set by user
1619 * - decoding: unused
1620 */
1621 int intra_dc_precision;
1622
1623 /**
1624 * noise vs. sse weight for the nsse comparsion function.
1625 * - encoding: set by user
1626 * - decoding: unused
1627 */
1628 int nsse_weight;
1629
1630 /**
1631 * number of macroblock rows at the top which are skiped.
1632 * - encoding: unused
1633 * - decoding: set by user
1634 */
1635 int skip_top;
1636
1637 /**
1638 * number of macroblock rows at the bottom which are skiped.
1639 * - encoding: unused
1640 * - decoding: set by user
1641 */
1642 int skip_bottom;
1643
1644 /**
1645 * profile
1646 * - encoding: set by user
1647 * - decoding: set by lavc
1648 */
1649 int profile;
1650 #define FF_PROFILE_UNKNOWN -99
1651
1652 /**
1653 * level
1654 * - encoding: set by user
1655 * - decoding: set by lavc
1656 */
1657 int level;
1658 #define FF_LEVEL_UNKNOWN -99
1659
1660 /**
1661 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1662 * - encoding: unused
1663 * - decoding: set by user
1664 */
1665 int lowres;
1666 } AVCodecContext;
1667
1668
1669 /**
1670 * AVOption.
1671 */
1672 typedef struct AVOption {
1673 /** options' name */
1674 const char *name; /* if name is NULL, it indicates a link to next */
1675 /** short English text help or const struct AVOption* subpointer */
1676 const char *help; // const struct AVOption* sub;
1677 /** offset to context structure where the parsed value should be stored */
1678 int offset;
1679 /** options' type */
1680 int type;
1681 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1682 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1683 #define FF_OPT_TYPE_INT 3 ///< integer
1684 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1685 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1686 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1687 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1688 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1689 /** min value (min == max -> no limits) */
1690 double min;
1691 /** maximum value for double/int */
1692 double max;
1693 /** default boo [0,1]l/double/int value */
1694 double defval;
1695 /**
1696 * default string value (with optional semicolon delimited extra option-list
1697 * i.e. option1;option2;option3
1698 * defval might select other then first argument as default
1699 */
1700 const char *defstr;
1701 #define FF_OPT_MAX_DEPTH 10
1702 } AVOption;
1703
1704 /**
1705 * Parse option(s) and sets fields in passed structure
1706 * @param strct structure where the parsed results will be written
1707 * @param list list with AVOptions
1708 * @param opts string with options for parsing
1709 */
1710 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1711
1712
1713 /**
1714 * AVCodec.
1715 */
1716 typedef struct AVCodec {
1717 const char *name;
1718 enum CodecType type;
1719 int id;
1720 int priv_data_size;
1721 int (*init)(AVCodecContext *);
1722 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1723 int (*close)(AVCodecContext *);
1724 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1725 uint8_t *buf, int buf_size);
1726 int capabilities;
1727 const AVOption *options;
1728 struct AVCodec *next;
1729 void (*flush)(AVCodecContext *);
1730 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1731 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1732 } AVCodec;
1733
1734 /**
1735 * four components are given, that's all.
1736 * the last component is alpha
1737 */
1738 typedef struct AVPicture {
1739 uint8_t *data[4];
1740 int linesize[4]; ///< number of bytes per line
1741 } AVPicture;
1742
1743 /**
1744 * AVPaletteControl
1745 * This structure defines a method for communicating palette changes
1746 * between and demuxer and a decoder.
1747 */
1748 #define AVPALETTE_SIZE 1024
1749 #define AVPALETTE_COUNT 256
1750 typedef struct AVPaletteControl {
1751
1752 /* demuxer sets this to 1 to indicate the palette has changed;
1753 * decoder resets to 0 */
1754 int palette_changed;
1755
1756 /* 4-byte ARGB palette entries, stored in native byte order; note that
1757 * the individual palette components should be on a 8-bit scale; if
1758 * the palette data comes from a IBM VGA native format, the component
1759 * data is probably 6 bits in size and needs to be scaled */
1760 unsigned int palette[AVPALETTE_COUNT];
1761
1762 } AVPaletteControl;
1763
1764 extern AVCodec ac3_encoder;
1765 extern AVCodec mp2_encoder;
1766 extern AVCodec mp3lame_encoder;
1767 extern AVCodec oggvorbis_encoder;
1768 extern AVCodec faac_encoder;
1769 extern AVCodec xvid_encoder;
1770 extern AVCodec mpeg1video_encoder;
1771 extern AVCodec mpeg2video_encoder;
1772 extern AVCodec h263_encoder;
1773 extern AVCodec h263p_encoder;
1774 extern AVCodec flv_encoder;
1775 extern AVCodec rv10_encoder;
1776 extern AVCodec rv20_encoder;
1777 extern AVCodec dvvideo_encoder;
1778 extern AVCodec mjpeg_encoder;
1779 extern AVCodec ljpeg_encoder;
1780 extern AVCodec mpeg4_encoder;
1781 extern AVCodec msmpeg4v1_encoder;
1782 extern AVCodec msmpeg4v2_encoder;
1783 extern AVCodec msmpeg4v3_encoder;
1784 extern AVCodec wmv1_encoder;
1785 extern AVCodec wmv2_encoder;
1786 extern AVCodec huffyuv_encoder;
1787 extern AVCodec h264_encoder;
1788 extern AVCodec asv1_encoder;
1789 extern AVCodec asv2_encoder;
1790 extern AVCodec vcr1_encoder;
1791 extern AVCodec ffv1_encoder;
1792 extern AVCodec snow_encoder;
1793 extern AVCodec mdec_encoder;
1794 extern AVCodec zlib_encoder;
1795 extern AVCodec sonic_encoder;
1796 extern AVCodec sonic_ls_encoder;
1797 extern AVCodec svq1_encoder;
1798
1799 extern AVCodec h263_decoder;
1800 extern AVCodec h261_decoder;
1801 extern AVCodec mpeg4_decoder;
1802 extern AVCodec msmpeg4v1_decoder;
1803 extern AVCodec msmpeg4v2_decoder;
1804 extern AVCodec msmpeg4v3_decoder;
1805 extern AVCodec wmv1_decoder;
1806 extern AVCodec wmv2_decoder;
1807 extern AVCodec mpeg1video_decoder;
1808 extern AVCodec mpeg2video_decoder;
1809 extern AVCodec mpegvideo_decoder;
1810 extern AVCodec mpeg_xvmc_decoder;
1811 extern AVCodec h263i_decoder;
1812 extern AVCodec flv_decoder;
1813 extern AVCodec rv10_decoder;
1814 extern AVCodec rv20_decoder;
1815 extern AVCodec svq1_decoder;
1816 extern AVCodec svq3_decoder;
1817 extern AVCodec dvvideo_decoder;
1818 extern AVCodec wmav1_decoder;
1819 extern AVCodec wmav2_decoder;
1820 extern AVCodec mjpeg_decoder;
1821 extern AVCodec mjpegb_decoder;
1822 extern AVCodec sp5x_decoder;
1823 extern AVCodec mp2_decoder;
1824 extern AVCodec mp3_decoder;
1825 extern AVCodec mace3_decoder;
1826 extern AVCodec mace6_decoder;
1827 extern AVCodec huffyuv_decoder;
1828 extern AVCodec oggvorbis_decoder;
1829 extern AVCodec cyuv_decoder;
1830 extern AVCodec h264_decoder;
1831 extern AVCodec indeo3_decoder;
1832 extern AVCodec vp3_decoder;
1833 extern AVCodec theora_decoder;
1834 extern AVCodec amr_nb_decoder;
1835 extern AVCodec amr_nb_encoder;
1836 extern AVCodec amr_wb_encoder;
1837 extern AVCodec amr_wb_decoder;
1838 extern AVCodec aac_decoder;
1839 extern AVCodec mpeg4aac_decoder;
1840 extern AVCodec asv1_decoder;
1841 extern AVCodec asv2_decoder;
1842 extern AVCodec vcr1_decoder;
1843 extern AVCodec cljr_decoder;
1844 extern AVCodec ffv1_decoder;
1845 extern AVCodec snow_decoder;
1846 extern AVCodec fourxm_decoder;
1847 extern AVCodec mdec_decoder;
1848 extern AVCodec roq_decoder;
1849 extern AVCodec interplay_video_decoder;
1850 extern AVCodec xan_wc3_decoder;
1851 extern AVCodec rpza_decoder;
1852 extern AVCodec cinepak_decoder;
1853 extern AVCodec msrle_decoder;
1854 extern AVCodec msvideo1_decoder;
1855 extern AVCodec vqa_decoder;
1856 extern AVCodec idcin_decoder;
1857 extern AVCodec eightbps_decoder;
1858 extern AVCodec smc_decoder;
1859 extern AVCodec flic_decoder;
1860 extern AVCodec vmdvideo_decoder;
1861 extern AVCodec vmdaudio_decoder;
1862 extern AVCodec truemotion1_decoder;
1863 extern AVCodec mszh_decoder;
1864 extern AVCodec zlib_decoder;
1865 extern AVCodec ra_144_decoder;
1866 extern AVCodec ra_288_decoder;
1867 extern AVCodec roq_dpcm_decoder;
1868 extern AVCodec interplay_dpcm_decoder;
1869 extern AVCodec xan_dpcm_decoder;
1870 extern AVCodec sonic_decoder;
1871 extern AVCodec qtrle_decoder;
1872 extern AVCodec flac_decoder;
1873 extern AVCodec tscc_decoder;
1874 extern AVCodec ulti_decoder;
1875
1876 /* pcm codecs */
1877 #define PCM_CODEC(id, name) \
1878 extern AVCodec name ## _decoder; \
1879 extern AVCodec name ## _encoder
1880
1881 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1882 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1883 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1884 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1885 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1886 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1887 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1888 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1889
1890 /* adpcm codecs */
1891
1892 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1893 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1894 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1895 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1896 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1897 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
1898 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1899 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1900 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1901 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1902 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
1903 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
1904
1905 #undef PCM_CODEC
1906
1907 /* dummy raw video codec */
1908 extern AVCodec rawvideo_encoder;
1909 extern AVCodec rawvideo_decoder;
1910
1911 /* the following codecs use external GPL libs */
1912 extern AVCodec ac3_decoder;
1913 extern AVCodec dts_decoder;
1914
1915 /* resample.c */
1916
1917 struct ReSampleContext;
1918 struct AVResampleContext;
1919
1920 typedef struct ReSampleContext ReSampleContext;
1921
1922 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1923 int output_rate, int input_rate);
1924 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1925 void audio_resample_close(ReSampleContext *s);
1926
1927 struct AVResampleContext *av_resample_init(int out_rate, int in_rate);
1928 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
1929 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
1930 void av_resample_close(struct AVResampleContext *c);
1931
1932 /* YUV420 format is assumed ! */
1933
1934 struct ImgReSampleContext;
1935
1936 typedef struct ImgReSampleContext ImgReSampleContext;
1937
1938 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1939 int input_width, int input_height);
1940
1941 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1942 int iwidth, int iheight,
1943 int topBand, int bottomBand,
1944 int leftBand, int rightBand,
1945 int padtop, int padbottom,
1946 int padleft, int padright);
1947
1948
1949 void img_resample(ImgReSampleContext *s,
1950 AVPicture *output, const AVPicture *input);
1951
1952 void img_resample_close(ImgReSampleContext *s);
1953
1954 /**
1955 * Allocate memory for a picture. Call avpicture_free to free it.
1956 *
1957 * @param picture the picture to be filled in.
1958 * @param pix_fmt the format of the picture.
1959 * @param width the width of the picture.
1960 * @param height the height of the picture.
1961 * @return 0 if successful, -1 if not.
1962 */
1963 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1964
1965 /* Free a picture previously allocated by avpicture_alloc. */
1966 void avpicture_free(AVPicture *picture);
1967
1968 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1969 int pix_fmt, int width, int height);
1970 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1971 unsigned char *dest, int dest_size);
1972 int avpicture_get_size(int pix_fmt, int width, int height);
1973 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1974 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1975 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1976
1977 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1978 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1979 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1980 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1981 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1982 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1983
1984 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1985 int has_alpha);
1986 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1987 int has_alpha, int *loss_ptr);
1988
1989 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1990 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1991 int img_get_alpha_info(const AVPicture *src,
1992 int pix_fmt, int width, int height);
1993
1994 /* convert among pixel formats */
1995 int img_convert(AVPicture *dst, int dst_pix_fmt,
1996 const AVPicture *src, int pix_fmt,
1997 int width, int height);
1998
1999 /* deinterlace a picture */
2000 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2001 int pix_fmt, int width, int height);
2002
2003 /* external high level API */
2004
2005 extern AVCodec *first_avcodec;
2006
2007 /* returns LIBAVCODEC_VERSION_INT constant */
2008 unsigned avcodec_version(void);
2009 /* returns LIBAVCODEC_BUILD constant */
2010 unsigned avcodec_build(void);
2011 void avcodec_init(void);
2012
2013 void register_avcodec(AVCodec *format);
2014 AVCodec *avcodec_find_encoder(enum CodecID id);
2015 AVCodec *avcodec_find_encoder_by_name(const char *name);
2016 AVCodec *avcodec_find_decoder(enum CodecID id);
2017 AVCodec *avcodec_find_decoder_by_name(const char *name);
2018 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2019
2020 void avcodec_get_context_defaults(AVCodecContext *s);
2021 AVCodecContext *avcodec_alloc_context(void);
2022 void avcodec_get_frame_defaults(AVFrame *pic);
2023 AVFrame *avcodec_alloc_frame(void);
2024
2025 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2026 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2027 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2028 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2029 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2030
2031 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2032 void avcodec_thread_free(AVCodecContext *s);
2033 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2034 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2035 //FIXME func typedef
2036
2037 /**
2038 * opens / inits the AVCodecContext.
2039 * not thread save!
2040 */
2041 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2042
2043 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2044 int *frame_size_ptr,
2045 uint8_t *buf, int buf_size);
2046 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2047 int *got_picture_ptr,
2048 uint8_t *buf, int buf_size);
2049 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2050 int *data_size_ptr,
2051 uint8_t *buf, int buf_size);
2052 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2053 const short *samples);
2054 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2055 const AVFrame *pict);
2056
2057 int avcodec_close(AVCodecContext *avctx);
2058
2059 void avcodec_register_all(void);
2060
2061 void avcodec_flush_buffers(AVCodecContext *avctx);
2062
2063 /* misc usefull functions */
2064
2065 /**
2066 * returns a single letter to describe the picture type
2067 */
2068 char av_get_pict_type_char(int pict_type);
2069
2070 /**
2071 * reduce a fraction.
2072 * this is usefull for framerate calculations
2073 * @param max the maximum allowed for dst_nom & dst_den
2074 * @return 1 if exact, 0 otherwise
2075 */
2076 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2077
2078 /**
2079 * rescale a 64bit integer with rounding to nearest.
2080 * a simple a*b/c isnt possible as it can overflow
2081 */
2082 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2083
2084 /**
2085 * rescale a 64bit integer with specified rounding.
2086 * a simple a*b/c isnt possible as it can overflow
2087 */
2088 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
2089
2090 /**
2091 * Interface for 0.5.0 version
2092 *
2093 * do not even think about it's usage for this moment
2094 */
2095
2096 typedef struct {
2097 /// compressed size used from given memory buffer
2098 int size;
2099 /// I/P/B frame type
2100 int frame_type;
2101 } avc_enc_result_t;
2102
2103 /**
2104 * Commands
2105 * order can't be changed - once it was defined
2106 */
2107 typedef enum {
2108 // general commands
2109 AVC_OPEN_BY_NAME = 0xACA000,
2110 AVC_OPEN_BY_CODEC_ID,
2111 AVC_OPEN_BY_FOURCC,
2112 AVC_CLOSE,
2113
2114 AVC_FLUSH,
2115 // pin - struct { uint8_t* src, uint_t src_size }
2116 // pout - struct { AVPicture* img, consumed_bytes,
2117 AVC_DECODE,
2118 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
2119 // pout - uint_t used_from_dest_size
2120 AVC_ENCODE,
2121
2122 // query/get video commands
2123 AVC_GET_VERSION = 0xACB000,
2124 AVC_GET_WIDTH,
2125 AVC_GET_HEIGHT,
2126 AVC_GET_DELAY,
2127 AVC_GET_QUANT_TABLE,
2128 // ...
2129
2130 // query/get audio commands
2131 AVC_GET_FRAME_SIZE = 0xABC000,
2132
2133 // maybe define some simple structure which
2134 // might be passed to the user - but they can't
2135 // contain any codec specific parts and these
2136 // calls are usualy necessary only few times
2137
2138 // set video commands
2139 AVC_SET_WIDTH = 0xACD000,
2140 AVC_SET_HEIGHT,
2141
2142 // set video encoding commands
2143 AVC_SET_FRAME_RATE = 0xACD800,
2144 AVC_SET_QUALITY,
2145 AVC_SET_HURRY_UP,
2146
2147 // set audio commands
2148 AVC_SET_SAMPLE_RATE = 0xACE000,
2149 AVC_SET_CHANNELS,
2150
2151 } avc_cmd_t;
2152
2153 /**
2154 * \param handle allocated private structure by libavcodec
2155 * for initialization pass NULL - will be returned pout
2156 * user is supposed to know nothing about its structure
2157 * \param cmd type of operation to be performed
2158 * \param pint input parameter
2159 * \param pout output parameter
2160 *
2161 * \returns command status - eventually for query command it might return
2162 * integer resulting value
2163 */
2164 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
2165
2166 /* frame parsing */
2167 typedef struct AVCodecParserContext {
2168 void *priv_data;
2169 struct AVCodecParser *parser;
2170 int64_t frame_offset; /* offset of the current frame */
2171 int64_t cur_offset; /* current offset
2172 (incremented by each av_parser_parse()) */
2173 int64_t last_frame_offset; /* offset of the last frame */
2174 /* video info */
2175 int pict_type; /* XXX: put it back in AVCodecContext */
2176 int repeat_pict; /* XXX: put it back in AVCodecContext */
2177 int64_t pts; /* pts of the current frame */
2178 int64_t dts; /* dts of the current frame */
2179
2180 /* private data */
2181 int64_t last_pts;
2182 int64_t last_dts;
2183 int fetch_timestamp;
2184
2185 #define AV_PARSER_PTS_NB 4
2186 int cur_frame_start_index;
2187 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2188 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2189 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2190 } AVCodecParserContext;
2191
2192 typedef struct AVCodecParser {
2193 int codec_ids[3]; /* several codec IDs are permitted */
2194 int priv_data_size;
2195 int (*parser_init)(AVCodecParserContext *s);
2196 int (*parser_parse)(AVCodecParserContext *s,
2197 AVCodecContext *avctx,
2198 uint8_t **poutbuf, int *poutbuf_size,
2199 const uint8_t *buf, int buf_size);
2200 void (*parser_close)(AVCodecParserContext *s);
2201 struct AVCodecParser *next;
2202 } AVCodecParser;
2203
2204 extern AVCodecParser *av_first_parser;
2205
2206 void av_register_codec_parser(AVCodecParser *parser);
2207 AVCodecParserContext *av_parser_init(int codec_id);
2208 int av_parser_parse(AVCodecParserContext *s,
2209 AVCodecContext *avctx,
2210 uint8_t **poutbuf, int *poutbuf_size,
2211 const uint8_t *buf, int buf_size,
2212 int64_t pts, int64_t dts);
2213 void av_parser_close(AVCodecParserContext *s);
2214
2215 extern AVCodecParser mpegvideo_parser;
2216 extern AVCodecParser mpeg4video_parser;
2217 extern AVCodecParser h261_parser;
2218 extern AVCodecParser h263_parser;
2219 extern AVCodecParser h264_parser;
2220 extern AVCodecParser mpegaudio_parser;
2221 extern AVCodecParser ac3_parser;
2222
2223 /* memory */
2224 void *av_malloc(unsigned int size);
2225 void *av_mallocz(unsigned int size);
2226 void *av_realloc(void *ptr, unsigned int size);
2227 void av_free(void *ptr);
2228 char *av_strdup(const char *s);
2229 void av_freep(void *ptr);
2230 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2231 /* for static data only */
2232 /* call av_free_static to release all staticaly allocated tables */
2233 void av_free_static(void);
2234 void *av_mallocz_static(unsigned int size);
2235
2236 /* add by bero : in adx.c */
2237 int is_adx(const unsigned char *buf,size_t bufsize);
2238
2239 void img_copy(AVPicture *dst, const AVPicture *src,
2240 int pix_fmt, int width, int height);
2241
2242 /* av_log API */
2243
2244 #include <stdarg.h>
2245
2246 #define AV_LOG_QUIET -1
2247 #define AV_LOG_ERROR 0
2248 #define AV_LOG_INFO 1
2249 #define AV_LOG_DEBUG 2
2250
2251 #ifdef __GNUC__
2252 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2253 #else
2254 extern void av_log(void*, int level, const char *fmt, ...);
2255 #endif
2256
2257 extern void av_vlog(void*, int level, const char *fmt, va_list);
2258 extern int av_log_get_level(void);
2259 extern void av_log_set_level(int);
2260 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2261
2262 /* endian macros */
2263 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2264 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2265 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2266 (((uint8_t*)(x))[1] << 16) | \
2267 (((uint8_t*)(x))[2] << 8) | \
2268 ((uint8_t*)(x))[3])
2269 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2270 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2271 (((uint8_t*)(x))[2] << 16) | \
2272 (((uint8_t*)(x))[1] << 8) | \
2273 ((uint8_t*)(x))[0])
2274 #endif
2275
2276 #ifdef __cplusplus
2277 }
2278 #endif
2279
2280 #endif /* AVCODEC_H */