6fb667e96046792e70e38b645e150eb8d6c891b6
[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
132 /* AMR */
133 CODEC_ID_AMR_NB,
134 CODEC_ID_AMR_WB,
135
136 /* RealAudio codecs*/
137 CODEC_ID_RA_144,
138 CODEC_ID_RA_288,
139
140 /* various DPCM codecs */
141 CODEC_ID_ROQ_DPCM,
142 CODEC_ID_INTERPLAY_DPCM,
143 CODEC_ID_XAN_DPCM,
144 CODEC_ID_SOL_DPCM,
145
146 CODEC_ID_FLAC,
147
148 CODEC_ID_MPEG2TS, /* _FAKE_ codec to indicate a raw MPEG2 transport
149 stream (only used by libavformat) */
150
151 CODEC_ID_DTS,
152 CODEC_ID_XVID,
153 };
154
155 /* CODEC_ID_MP3LAME is absolete */
156 #define CODEC_ID_MP3LAME CODEC_ID_MP3
157
158 enum CodecType {
159 CODEC_TYPE_UNKNOWN = -1,
160 CODEC_TYPE_VIDEO,
161 CODEC_TYPE_AUDIO,
162 CODEC_TYPE_DATA,
163 };
164
165 /**
166 * Pixel format. Notes:
167 *
168 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
169 * color is put together as:
170 * (A << 24) | (R << 16) | (G << 8) | B
171 * This is stored as BGRA on little endian CPU architectures and ARGB on
172 * big endian CPUs.
173 *
174 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
175 * image data is stored in AVFrame.data[0]. The palette is transported in
176 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
177 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
178 * also endian-specific). Note also that the individual RGB palette
179 * components stored in AVFrame.data[1] should be in the range 0..255.
180 * This is important as many custom PAL8 video codecs that were designed
181 * to run on the IBM VGA graphics adapter use 6-bit palette components.
182 */
183 enum PixelFormat {
184 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
185 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
186 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
187 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
188 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
189 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
190 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
191 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
192 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
193 PIX_FMT_RGB565, ///< always stored in cpu endianness
194 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
195 PIX_FMT_GRAY8,
196 PIX_FMT_MONOWHITE, ///< 0 is white
197 PIX_FMT_MONOBLACK, ///< 0 is black
198 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
199 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
200 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
201 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
202 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
203 PIX_FMT_XVMC_MPEG2_IDCT,
204 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
205 PIX_FMT_NB,
206 };
207
208 /* currently unused, may be used if 24/32 bits samples ever supported */
209 enum SampleFormat {
210 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
211 };
212
213 /* in bytes */
214 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
215
216 /**
217 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
218 * this is mainly needed because some optimized bitstream readers read
219 * 32 or 64 bit at once and could read over the end<br>
220 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
221 * MPEG bitstreams could cause overread and segfault
222 */
223 #define FF_INPUT_BUFFER_PADDING_SIZE 8
224
225 /* motion estimation type, EPZS by default */
226 enum Motion_Est_ID {
227 ME_ZERO = 1,
228 ME_FULL,
229 ME_LOG,
230 ME_PHODS,
231 ME_EPZS,
232 ME_X1
233 };
234
235 enum AVRounding {
236 AV_ROUND_ZERO = 0, ///< round toward zero
237 AV_ROUND_INF = 1, ///< round away from zero
238 AV_ROUND_DOWN = 2, ///< round toward -infinity
239 AV_ROUND_UP = 3, ///< round toward +infinity
240 AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
241 };
242
243 typedef struct RcOverride{
244 int start_frame;
245 int end_frame;
246 int qscale; // if this is 0 then quality_factor will be used instead
247 float quality_factor;
248 } RcOverride;
249
250 /* only for ME compatiblity with old apps */
251 extern int motion_estimation_method;
252
253 #define FF_MAX_B_FRAMES 8
254
255 /* encoding support
256 these flags can be passed in AVCodecContext.flags before initing
257 Note: note not everything is supported yet
258 */
259
260 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
261 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
262 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
263 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
264 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
265 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
266 /* parent program gurantees that the input for b-frame containing streams is not written to
267 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
268 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
269 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
270 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
271 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
272 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
273 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
274 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
275 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
276 of only at frame boundaries */
277 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
278 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
279 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
280 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
281 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
282 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
283 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
284 /* Fx : Flag for h263+ extra options */
285 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
286 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
287 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
288 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
289 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
290 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
291 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
292 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
293 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
294 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
295 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
296 #define CODEC_FLAG_CLOSED_GOP 0x80000000
297 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
298
299 /* Unsupported options :
300 * Syntax Arithmetic coding (SAC)
301 * Reference Picture Selection
302 * Independant Segment Decoding */
303 /* /Fx */
304 /* codec capabilities */
305
306 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
307 /**
308 * Codec uses get_buffer() for allocating buffers.
309 * direct rendering method 1
310 */
311 #define CODEC_CAP_DR1 0x0002
312 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
313 used */
314 #define CODEC_CAP_PARSE_ONLY 0x0004
315 #define CODEC_CAP_TRUNCATED 0x0008
316 /* codec can export data for HW decoding (XvMC) */
317 #define CODEC_CAP_HWACCEL 0x0010
318 /** codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data */
319 #define CODEC_CAP_DELAY 0x0020
320
321 //the following defines might change, so dont expect compatibility if u use them
322 #define MB_TYPE_INTRA4x4 0x0001
323 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
324 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
325 #define MB_TYPE_16x16 0x0008
326 #define MB_TYPE_16x8 0x0010
327 #define MB_TYPE_8x16 0x0020
328 #define MB_TYPE_8x8 0x0040
329 #define MB_TYPE_INTERLACED 0x0080
330 #define MB_TYPE_DIRECT2 0x0100 //FIXME
331 #define MB_TYPE_ACPRED 0x0200
332 #define MB_TYPE_GMC 0x0400
333 #define MB_TYPE_SKIP 0x0800
334 #define MB_TYPE_P0L0 0x1000
335 #define MB_TYPE_P1L0 0x2000
336 #define MB_TYPE_P0L1 0x4000
337 #define MB_TYPE_P1L1 0x8000
338 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
339 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
340 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
341 #define MB_TYPE_QUANT 0x00010000
342 #define MB_TYPE_CBP 0x00020000
343 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
344
345 /**
346 * Pan Scan area.
347 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
348 */
349 typedef struct AVPanScan{
350 /**
351 * id.
352 * - encoding: set by user.
353 * - decoding: set by lavc
354 */
355 int id;
356
357 /**
358 * width and height in 1/16 pel
359 * - encoding: set by user.
360 * - decoding: set by lavc
361 */
362 int width;
363 int height;
364
365 /**
366 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
367 * - encoding: set by user.
368 * - decoding: set by lavc
369 */
370 int16_t position[3][2];
371 }AVPanScan;
372
373 #define FF_COMMON_FRAME \
374 /**\
375 * pointer to the picture planes.\
376 * this might be different from the first allocated byte\
377 * - encoding: \
378 * - decoding: \
379 */\
380 uint8_t *data[4];\
381 int linesize[4];\
382 /**\
383 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
384 * this isnt used by lavc unless the default get/release_buffer() is used\
385 * - encoding: \
386 * - decoding: \
387 */\
388 uint8_t *base[4];\
389 /**\
390 * 1 -> keyframe, 0-> not\
391 * - encoding: set by lavc\
392 * - decoding: set by lavc\
393 */\
394 int key_frame;\
395 \
396 /**\
397 * picture type of the frame, see ?_TYPE below.\
398 * - encoding: set by lavc for coded_picture (and set by user for input)\
399 * - decoding: set by lavc\
400 */\
401 int pict_type;\
402 \
403 /**\
404 * presentation timestamp in AV_TIME_BASE (=micro seconds currently) (time when frame should be shown to user)\
405 * if AV_NOPTS_VALUE then the frame_rate will be used as reference\
406 * - encoding: MUST be set by user\
407 * - decoding: set by lavc\
408 */\
409 int64_t pts;\
410 \
411 /**\
412 * picture number in bitstream order.\
413 * - encoding: set by\
414 * - decoding: set by lavc\
415 */\
416 int coded_picture_number;\
417 /**\
418 * picture number in display order.\
419 * - encoding: set by\
420 * - decoding: set by lavc\
421 */\
422 int display_picture_number;\
423 \
424 /**\
425 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
426 * - encoding: set by lavc for coded_picture (and set by user for input)\
427 * - decoding: set by lavc\
428 */\
429 int quality; \
430 \
431 /**\
432 * buffer age (1->was last buffer and dint change, 2->..., ...).\
433 * set to INT_MAX if the buffer has not been used yet \
434 * - encoding: unused\
435 * - decoding: MUST be set by get_buffer()\
436 */\
437 int age;\
438 \
439 /**\
440 * is this picture used as reference\
441 * - encoding: unused\
442 * - decoding: set by lavc (before get_buffer() call))\
443 */\
444 int reference;\
445 \
446 /**\
447 * QP table\
448 * - encoding: unused\
449 * - decoding: set by lavc\
450 */\
451 int8_t *qscale_table;\
452 /**\
453 * QP store stride\
454 * - encoding: unused\
455 * - decoding: set by lavc\
456 */\
457 int qstride;\
458 \
459 /**\
460 * mbskip_table[mb]>=1 if MB didnt change\
461 * stride= mb_width = (width+15)>>4\
462 * - encoding: unused\
463 * - decoding: set by lavc\
464 */\
465 uint8_t *mbskip_table;\
466 \
467 /**\
468 * Motion vector table\
469 * - encoding: set by user\
470 * - decoding: set by lavc\
471 */\
472 int16_t (*motion_val[2])[2];\
473 \
474 /**\
475 * Macroblock type table\
476 * mb_type_base + mb_width + 2\
477 * - encoding: set by user\
478 * - decoding: set by lavc\
479 */\
480 uint32_t *mb_type;\
481 \
482 /**\
483 * Macroblock size: (0->16x16, 1->8x8, 2-> 4x4, 3-> 2x2)\
484 * - encoding: unused\
485 * - decoding: set by lavc\
486 */\
487 uint8_t motion_subsample_log2;\
488 \
489 /**\
490 * for some private data of the user\
491 * - encoding: unused\
492 * - decoding: set by user\
493 */\
494 void *opaque;\
495 \
496 /**\
497 * error\
498 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
499 * - decoding: unused\
500 */\
501 uint64_t error[4];\
502 \
503 /**\
504 * type of the buffer (to keep track of who has to dealloc data[*])\
505 * - encoding: set by the one who allocs it\
506 * - decoding: set by the one who allocs it\
507 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
508 */\
509 int type;\
510 \
511 /**\
512 * when decoding, this signal how much the picture must be delayed.\
513 * extra_delay = repeat_pict / (2*fps)\
514 * - encoding: unused\
515 * - decoding: set by lavc\
516 */\
517 int repeat_pict;\
518 \
519 /**\
520 * \
521 */\
522 int qscale_type;\
523 \
524 /**\
525 * The content of the picture is interlaced.\
526 * - encoding: set by user\
527 * - decoding: set by lavc (default 0)\
528 */\
529 int interlaced_frame;\
530 \
531 /**\
532 * if the content is interlaced, is top field displayed first.\
533 * - encoding: set by user\
534 * - decoding: set by lavc\
535 */\
536 int top_field_first;\
537 \
538 /**\
539 * Pan scan.\
540 * - encoding: set by user\
541 * - decoding: set by lavc\
542 */\
543 AVPanScan *pan_scan;\
544 \
545 /**\
546 * tell user application that palette has changed from previous frame.\
547 * - encoding: ??? (no palette-enabled encoder yet)\
548 * - decoding: set by lavc (default 0)\
549 */\
550 int palette_has_changed;\
551 \
552 /**\
553 * Codec suggestion on buffer type if != 0\
554 * - encoding: unused\
555 * - decoding: set by lavc (before get_buffer() call))\
556 */\
557 int buffer_hints;\
558 \
559 /**\
560 * DCT coeffitients\
561 * - encoding: unused\
562 * - decoding: set by lavc\
563 */\
564 short *dct_coeff;\
565 \
566 /**\
567 * Motion referece frame index\
568 * - encoding: set by user\
569 * - decoding: set by lavc\
570 */\
571 int8_t *ref_index[2];
572
573 #define FF_QSCALE_TYPE_MPEG1 0
574 #define FF_QSCALE_TYPE_MPEG2 1
575
576 #define FF_BUFFER_TYPE_INTERNAL 1
577 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
578 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
579 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
580
581
582 #define FF_I_TYPE 1 // Intra
583 #define FF_P_TYPE 2 // Predicted
584 #define FF_B_TYPE 3 // Bi-dir predicted
585 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
586 #define FF_SI_TYPE 5
587 #define FF_SP_TYPE 6
588
589 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
590 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
591 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
592 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
593
594 /**
595 * Audio Video Frame.
596 */
597 typedef struct AVFrame {
598 FF_COMMON_FRAME
599 } AVFrame;
600
601 #define DEFAULT_FRAME_RATE_BASE 1001000
602
603 /**
604 * Used by av_log
605 */
606 typedef struct AVCLASS AVClass;
607 struct AVCLASS {
608 const char* class_name;
609 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
610 or AVFormatContext, which begin with an AVClass.
611 Needed because av_log is in libavcodec and has no visibility
612 of AVIn/OutputFormat */
613 };
614
615 /**
616 * main external api structure.
617 */
618 typedef struct AVCodecContext {
619 /**
620 * Info on struct for av_log
621 * - set by avcodec_alloc_context
622 */
623 AVClass *av_class;
624 /**
625 * the average bitrate.
626 * - encoding: set by user. unused for constant quantizer encoding
627 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
628 */
629 int bit_rate;
630
631 /**
632 * number of bits the bitstream is allowed to diverge from the reference.
633 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
634 * - encoding: set by user. unused for constant quantizer encoding
635 * - decoding: unused
636 */
637 int bit_rate_tolerance;
638
639 /**
640 * CODEC_FLAG_*.
641 * - encoding: set by user.
642 * - decoding: set by user.
643 */
644 int flags;
645
646 /**
647 * some codecs needs additionnal format info. It is stored here
648 * - encoding: set by user.
649 * - decoding: set by lavc. (FIXME is this ok?)
650 */
651 int sub_id;
652
653 /**
654 * motion estimation algorithm used for video coding.
655 * - encoding: MUST be set by user.
656 * - decoding: unused
657 */
658 int me_method;
659
660 /**
661 * some codecs need / can use extra-data like huffman tables.
662 * mjpeg: huffman tables
663 * rv10: additional flags
664 * mpeg4: global headers (they can be in the bitstream or here)
665 * - encoding: set/allocated/freed by lavc.
666 * - decoding: set/allocated/freed by user.
667 */
668 void *extradata;
669 int extradata_size;
670
671 /* video only */
672 /**
673 * frames per sec multiplied by frame_rate_base.
674 * for variable fps this is the precission, so if the timestamps
675 * can be specified in msec precssion then this is 1000*frame_rate_base
676 * - encoding: MUST be set by user
677 * - decoding: set by lavc. 0 or the frame_rate if available
678 */
679 int frame_rate;
680
681 /**
682 * picture width / height.
683 * - encoding: MUST be set by user.
684 * - decoding: set by lavc.
685 * Note, for compatibility its possible to set this instead of
686 * coded_width/height before decoding
687 */
688 int width, height;
689
690 #define FF_ASPECT_EXTENDED 15
691
692 /**
693 * the number of pictures in a group of pitures, or 0 for intra_only.
694 * - encoding: set by user.
695 * - decoding: unused
696 */
697 int gop_size;
698
699 /**
700 * pixel format, see PIX_FMT_xxx.
701 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
702 * conversion is in order. This only works for
703 * codecs with one supported pix_fmt, we should
704 * do something for a generic case as well.
705 * - decoding: set by lavc.
706 */
707 enum PixelFormat pix_fmt;
708
709 /**
710 * Frame rate emulation. If not zero lower layer (i.e. format handler)
711 * has to read frames at native frame rate.
712 * - encoding: set by user.
713 * - decoding: unused.
714 */
715 int rate_emu;
716
717 /**
718 * if non NULL, 'draw_horiz_band' is called by the libavcodec
719 * decoder to draw an horizontal band. It improve cache usage. Not
720 * all codecs can do that. You must check the codec capabilities
721 * before
722 * - encoding: unused
723 * - decoding: set by user.
724 * @param height the height of the slice
725 * @param y the y position of the slice
726 * @param type 1->top field, 2->bottom field, 3->frame
727 * @param offset offset into the AVFrame.data from which the slice should be read
728 */
729 void (*draw_horiz_band)(struct AVCodecContext *s,
730 const AVFrame *src, int offset[4],
731 int y, int type, int height);
732
733 /* audio only */
734 int sample_rate; ///< samples per sec
735 int channels;
736 int sample_fmt; ///< sample format, currenly unused
737
738 /* the following data should not be initialized */
739 int frame_size; ///< in samples, initialized when calling 'init'
740 int frame_number; ///< audio or video frame number
741 int real_pict_num; ///< returns the real picture number of previous encoded frame
742
743 /**
744 * number of frames the decoded output will be delayed relative to
745 * the encoded input.
746 * - encoding: set by lavc.
747 * - decoding: unused
748 */
749 int delay;
750
751 /* - encoding parameters */
752 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
753 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
754
755 /**
756 * minimum quantizer.
757 * - encoding: set by user.
758 * - decoding: unused
759 */
760 int qmin;
761
762 /**
763 * maximum quantizer.
764 * - encoding: set by user.
765 * - decoding: unused
766 */
767 int qmax;
768
769 /**
770 * maximum quantizer difference etween frames.
771 * - encoding: set by user.
772 * - decoding: unused
773 */
774 int max_qdiff;
775
776 /**
777 * maximum number of b frames between non b frames.
778 * note: the output will be delayed by max_b_frames+1 relative to the input
779 * - encoding: set by user.
780 * - decoding: unused
781 */
782 int max_b_frames;
783
784 /**
785 * qscale factor between ip and b frames.
786 * - encoding: set by user.
787 * - decoding: unused
788 */
789 float b_quant_factor;
790
791 /** obsolete FIXME remove */
792 int rc_strategy;
793 int b_frame_strategy;
794
795 /**
796 * hurry up amount.
797 * - encoding: unused
798 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
799 */
800 int hurry_up;
801
802 struct AVCodec *codec;
803
804 void *priv_data;
805
806 /* unused, FIXME remove*/
807 int rtp_mode;
808
809 int rtp_payload_size; /* The size of the RTP payload, the coder will */
810 /* do it's best to deliver a chunk with size */
811 /* below rtp_payload_size, the chunk will start */
812 /* with a start code on some codecs like H.263 */
813 /* This doesn't take account of any particular */
814 /* headers inside the transmited RTP payload */
815
816
817 /* The RTP callcack: This function is called */
818 /* every time the encoder as a packet to send */
819 /* Depends on the encoder if the data starts */
820 /* with a Start Code (it should) H.263 does */
821 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int packet_number);
822
823 /* statistics, used for 2-pass encoding */
824 int mv_bits;
825 int header_bits;
826 int i_tex_bits;
827 int p_tex_bits;
828 int i_count;
829 int p_count;
830 int skip_count;
831 int misc_bits;
832
833 /**
834 * number of bits used for the previously encoded frame.
835 * - encoding: set by lavc
836 * - decoding: unused
837 */
838 int frame_bits;
839
840 /**
841 * private data of the user, can be used to carry app specific stuff.
842 * - encoding: set by user
843 * - decoding: set by user
844 */
845 void *opaque;
846
847 char codec_name[32];
848 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
849 enum CodecID codec_id; /* see CODEC_ID_xxx */
850
851 /**
852 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
853 * this is used to workaround some encoder bugs
854 * - encoding: set by user, if not then the default based on codec_id will be used
855 * - decoding: set by user, will be converted to upper case by lavc during init
856 */
857 unsigned int codec_tag;
858
859 /**
860 * workaround bugs in encoders which sometimes cannot be detected automatically.
861 * - encoding: unused
862 * - decoding: set by user
863 */
864 int workaround_bugs;
865 #define FF_BUG_AUTODETECT 1 ///< autodetection
866 #define FF_BUG_OLD_MSMPEG4 2
867 #define FF_BUG_XVID_ILACE 4
868 #define FF_BUG_UMP4 8
869 #define FF_BUG_NO_PADDING 16
870 #define FF_BUG_AMV 32
871 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
872 #define FF_BUG_QPEL_CHROMA 64
873 #define FF_BUG_STD_QPEL 128
874 #define FF_BUG_QPEL_CHROMA2 256
875 #define FF_BUG_DIRECT_BLOCKSIZE 512
876 #define FF_BUG_EDGE 1024
877 #define FF_BUG_HPEL_CHROMA 2048
878 #define FF_BUG_DC_CLIP 4096
879 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
880
881 /**
882 * luma single coeff elimination threshold.
883 * - encoding: set by user
884 * - decoding: unused
885 */
886 int luma_elim_threshold;
887
888 /**
889 * chroma single coeff elimination threshold.
890 * - encoding: set by user
891 * - decoding: unused
892 */
893 int chroma_elim_threshold;
894
895 /**
896 * strictly follow the std (MPEG4, ...).
897 * - encoding: set by user
898 * - decoding: unused
899 */
900 int strict_std_compliance;
901
902 /**
903 * qscale offset between ip and b frames.
904 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
905 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
906 * - encoding: set by user.
907 * - decoding: unused
908 */
909 float b_quant_offset;
910
911 /**
912 * error resilience higher values will detect more errors but may missdetect
913 * some more or less valid parts as errors.
914 * - encoding: unused
915 * - decoding: set by user
916 */
917 int error_resilience;
918 #define FF_ER_CAREFULL 1
919 #define FF_ER_COMPLIANT 2
920 #define FF_ER_AGGRESSIVE 3
921 #define FF_ER_VERY_AGGRESSIVE 4
922
923 /**
924 * called at the beginning of each frame to get a buffer for it.
925 * if pic.reference is set then the frame will be read later by lavc
926 * avcodec_align_dimensions() should be used to find the required width and
927 * height, as they normally need to be rounded up to the next multiple of 16
928 * - encoding: unused
929 * - decoding: set by lavc, user can override
930 */
931 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
932
933 /**
934 * called to release buffers which where allocated with get_buffer.
935 * a released buffer can be reused in get_buffer()
936 * pic.data[*] must be set to NULL
937 * - encoding: unused
938 * - decoding: set by lavc, user can override
939 */
940 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
941
942 /**
943 * if 1 the stream has a 1 frame delay during decoding.
944 * - encoding: set by lavc
945 * - decoding: set by lavc
946 */
947 int has_b_frames;
948
949 int block_align; ///< used by some WAV based audio codecs
950
951 int parse_only; /* - decoding only: if true, only parsing is done
952 (function avcodec_parse_frame()). The frame
953 data is returned. Only MPEG codecs support this now. */
954
955 /**
956 * 0-> h263 quant 1-> mpeg quant.
957 * - encoding: set by user.
958 * - decoding: unused
959 */
960 int mpeg_quant;
961
962 /**
963 * pass1 encoding statistics output buffer.
964 * - encoding: set by lavc
965 * - decoding: unused
966 */
967 char *stats_out;
968
969 /**
970 * pass2 encoding statistics input buffer.
971 * concatenated stuff from stats_out of pass1 should be placed here
972 * - encoding: allocated/set/freed by user
973 * - decoding: unused
974 */
975 char *stats_in;
976
977 /**
978 * ratecontrol qmin qmax limiting method.
979 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
980 * - encoding: set by user.
981 * - decoding: unused
982 */
983 float rc_qsquish;
984
985 float rc_qmod_amp;
986 int rc_qmod_freq;
987
988 /**
989 * ratecontrol override, see RcOverride.
990 * - encoding: allocated/set/freed by user.
991 * - decoding: unused
992 */
993 RcOverride *rc_override;
994 int rc_override_count;
995
996 /**
997 * rate control equation.
998 * - encoding: set by user
999 * - decoding: unused
1000 */
1001 char *rc_eq;
1002
1003 /**
1004 * maximum bitrate.
1005 * - encoding: set by user.
1006 * - decoding: unused
1007 */
1008 int rc_max_rate;
1009
1010 /**
1011 * minimum bitrate.
1012 * - encoding: set by user.
1013 * - decoding: unused
1014 */
1015 int rc_min_rate;
1016
1017 /**
1018 * decoder bitstream buffer size.
1019 * - encoding: set by user.
1020 * - decoding: unused
1021 */
1022 int rc_buffer_size;
1023 float rc_buffer_aggressivity;
1024
1025 /**
1026 * qscale factor between p and i frames.
1027 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1028 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1029 * - encoding: set by user.
1030 * - decoding: unused
1031 */
1032 float i_quant_factor;
1033
1034 /**
1035 * qscale offset between p and i frames.
1036 * - encoding: set by user.
1037 * - decoding: unused
1038 */
1039 float i_quant_offset;
1040
1041 /**
1042 * initial complexity for pass1 ratecontrol.
1043 * - encoding: set by user.
1044 * - decoding: unused
1045 */
1046 float rc_initial_cplx;
1047
1048 /**
1049 * dct algorithm, see FF_DCT_* below.
1050 * - encoding: set by user
1051 * - decoding: unused
1052 */
1053 int dct_algo;
1054 #define FF_DCT_AUTO 0
1055 #define FF_DCT_FASTINT 1
1056 #define FF_DCT_INT 2
1057 #define FF_DCT_MMX 3
1058 #define FF_DCT_MLIB 4
1059 #define FF_DCT_ALTIVEC 5
1060 #define FF_DCT_FAAN 6
1061
1062 /**
1063 * luminance masking (0-> disabled).
1064 * - encoding: set by user
1065 * - decoding: unused
1066 */
1067 float lumi_masking;
1068
1069 /**
1070 * temporary complexity masking (0-> disabled).
1071 * - encoding: set by user
1072 * - decoding: unused
1073 */
1074 float temporal_cplx_masking;
1075
1076 /**
1077 * spatial complexity masking (0-> disabled).
1078 * - encoding: set by user
1079 * - decoding: unused
1080 */
1081 float spatial_cplx_masking;
1082
1083 /**
1084 * p block masking (0-> disabled).
1085 * - encoding: set by user
1086 * - decoding: unused
1087 */
1088 float p_masking;
1089
1090 /**
1091 * darkness masking (0-> disabled).
1092 * - encoding: set by user
1093 * - decoding: unused
1094 */
1095 float dark_masking;
1096
1097
1098 /* for binary compatibility */
1099 int unused;
1100
1101 /**
1102 * idct algorithm, see FF_IDCT_* below.
1103 * - encoding: set by user
1104 * - decoding: set by user
1105 */
1106 int idct_algo;
1107 #define FF_IDCT_AUTO 0
1108 #define FF_IDCT_INT 1
1109 #define FF_IDCT_SIMPLE 2
1110 #define FF_IDCT_SIMPLEMMX 3
1111 #define FF_IDCT_LIBMPEG2MMX 4
1112 #define FF_IDCT_PS2 5
1113 #define FF_IDCT_MLIB 6
1114 #define FF_IDCT_ARM 7
1115 #define FF_IDCT_ALTIVEC 8
1116 #define FF_IDCT_SH4 9
1117 #define FF_IDCT_SIMPLEARM 10
1118 #define FF_IDCT_H264 11
1119
1120 /**
1121 * slice count.
1122 * - encoding: set by lavc
1123 * - decoding: set by user (or 0)
1124 */
1125 int slice_count;
1126 /**
1127 * slice offsets in the frame in bytes.
1128 * - encoding: set/allocated by lavc
1129 * - decoding: set/allocated by user (or NULL)
1130 */
1131 int *slice_offset;
1132
1133 /**
1134 * error concealment flags.
1135 * - encoding: unused
1136 * - decoding: set by user
1137 */
1138 int error_concealment;
1139 #define FF_EC_GUESS_MVS 1
1140 #define FF_EC_DEBLOCK 2
1141
1142 /**
1143 * dsp_mask could be add used to disable unwanted CPU features
1144 * CPU features (i.e. MMX, SSE. ...)
1145 *
1146 * with FORCE flag you may instead enable given CPU features
1147 * (Dangerous: usable in case of misdetection, improper usage however will
1148 * result into program crash)
1149 */
1150 unsigned dsp_mask;
1151 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1152 /* lower 16 bits - CPU features */
1153 #ifdef HAVE_MMX
1154 #define FF_MM_MMX 0x0001 /* standard MMX */
1155 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1156 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1157 #define FF_MM_SSE 0x0008 /* SSE functions */
1158 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1159 #endif /* HAVE_MMX */
1160
1161 /**
1162 * bits per sample/pixel from the demuxer (needed for huffyuv).
1163 * - encoding: set by lavc
1164 * - decoding: set by user
1165 */
1166 int bits_per_sample;
1167
1168 /**
1169 * prediction method (needed for huffyuv).
1170 * - encoding: set by user
1171 * - decoding: unused
1172 */
1173 int prediction_method;
1174 #define FF_PRED_LEFT 0
1175 #define FF_PRED_PLANE 1
1176 #define FF_PRED_MEDIAN 2
1177
1178 /**
1179 * sample aspect ratio (0 if unknown).
1180 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1181 * - encoding: set by user.
1182 * - decoding: set by lavc.
1183 */
1184 AVRational sample_aspect_ratio;
1185
1186 /**
1187 * the picture in the bitstream.
1188 * - encoding: set by lavc
1189 * - decoding: set by lavc
1190 */
1191 AVFrame *coded_frame;
1192
1193 /**
1194 * debug.
1195 * - encoding: set by user.
1196 * - decoding: set by user.
1197 */
1198 int debug;
1199 #define FF_DEBUG_PICT_INFO 1
1200 #define FF_DEBUG_RC 2
1201 #define FF_DEBUG_BITSTREAM 4
1202 #define FF_DEBUG_MB_TYPE 8
1203 #define FF_DEBUG_QP 16
1204 #define FF_DEBUG_MV 32
1205 #define FF_DEBUG_DCT_COEFF 0x00000040
1206 #define FF_DEBUG_SKIP 0x00000080
1207 #define FF_DEBUG_STARTCODE 0x00000100
1208 #define FF_DEBUG_PTS 0x00000200
1209 #define FF_DEBUG_ER 0x00000400
1210 #define FF_DEBUG_MMCO 0x00000800
1211 #define FF_DEBUG_BUGS 0x00001000
1212 #define FF_DEBUG_VIS_QP 0x00002000
1213 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1214
1215 /**
1216 * debug.
1217 * - encoding: set by user.
1218 * - decoding: set by user.
1219 */
1220 int debug_mv;
1221 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1222 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1223 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1224
1225 /**
1226 * error.
1227 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1228 * - decoding: unused
1229 */
1230 uint64_t error[4];
1231
1232 /**
1233 * minimum MB quantizer.
1234 * - encoding: set by user.
1235 * - decoding: unused
1236 */
1237 int mb_qmin;
1238
1239 /**
1240 * maximum MB quantizer.
1241 * - encoding: set by user.
1242 * - decoding: unused
1243 */
1244 int mb_qmax;
1245
1246 /**
1247 * motion estimation compare function.
1248 * - encoding: set by user.
1249 * - decoding: unused
1250 */
1251 int me_cmp;
1252 /**
1253 * subpixel motion estimation compare function.
1254 * - encoding: set by user.
1255 * - decoding: unused
1256 */
1257 int me_sub_cmp;
1258 /**
1259 * macroblock compare function (not supported yet).
1260 * - encoding: set by user.
1261 * - decoding: unused
1262 */
1263 int mb_cmp;
1264 /**
1265 * interlaced dct compare function
1266 * - encoding: set by user.
1267 * - decoding: unused
1268 */
1269 int ildct_cmp;
1270 #define FF_CMP_SAD 0
1271 #define FF_CMP_SSE 1
1272 #define FF_CMP_SATD 2
1273 #define FF_CMP_DCT 3
1274 #define FF_CMP_PSNR 4
1275 #define FF_CMP_BIT 5
1276 #define FF_CMP_RD 6
1277 #define FF_CMP_ZERO 7
1278 #define FF_CMP_VSAD 8
1279 #define FF_CMP_VSSE 9
1280 #define FF_CMP_NSSE 10
1281 #define FF_CMP_W53 11
1282 #define FF_CMP_W97 12
1283 #define FF_CMP_CHROMA 256
1284
1285 /**
1286 * ME diamond size & shape.
1287 * - encoding: set by user.
1288 * - decoding: unused
1289 */
1290 int dia_size;
1291
1292 /**
1293 * amount of previous MV predictors (2a+1 x 2a+1 square).
1294 * - encoding: set by user.
1295 * - decoding: unused
1296 */
1297 int last_predictor_count;
1298
1299 /**
1300 * pre pass for motion estimation.
1301 * - encoding: set by user.
1302 * - decoding: unused
1303 */
1304 int pre_me;
1305
1306 /**
1307 * motion estimation pre pass compare function.
1308 * - encoding: set by user.
1309 * - decoding: unused
1310 */
1311 int me_pre_cmp;
1312
1313 /**
1314 * ME pre pass diamond size & shape.
1315 * - encoding: set by user.
1316 * - decoding: unused
1317 */
1318 int pre_dia_size;
1319
1320 /**
1321 * subpel ME quality.
1322 * - encoding: set by user.
1323 * - decoding: unused
1324 */
1325 int me_subpel_quality;
1326
1327 /**
1328 * callback to negotiate the pixelFormat.
1329 * @param fmt is the list of formats which are supported by the codec,
1330 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1331 * the first is allways the native one
1332 * @return the choosen format
1333 * - encoding: unused
1334 * - decoding: set by user, if not set then the native format will always be choosen
1335 */
1336 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1337
1338 /**
1339 * DTG active format information (additionnal aspect ratio
1340 * information only used in DVB MPEG2 transport streams). 0 if
1341 * not set.
1342 *
1343 * - encoding: unused.
1344 * - decoding: set by decoder
1345 */
1346 int dtg_active_format;
1347 #define FF_DTG_AFD_SAME 8
1348 #define FF_DTG_AFD_4_3 9
1349 #define FF_DTG_AFD_16_9 10
1350 #define FF_DTG_AFD_14_9 11
1351 #define FF_DTG_AFD_4_3_SP_14_9 13
1352 #define FF_DTG_AFD_16_9_SP_14_9 14
1353 #define FF_DTG_AFD_SP_4_3 15
1354
1355 /**
1356 * Maximum motion estimation search range in subpel units.
1357 * if 0 then no limit
1358 *
1359 * - encoding: set by user.
1360 * - decoding: unused.
1361 */
1362 int me_range;
1363
1364 /**
1365 * frame_rate_base.
1366 * for variable fps this is 1
1367 * - encoding: set by user.
1368 * - decoding: set by lavc.
1369 * @todo move this after frame_rate
1370 */
1371
1372 int frame_rate_base;
1373 /**
1374 * intra quantizer bias.
1375 * - encoding: set by user.
1376 * - decoding: unused
1377 */
1378 int intra_quant_bias;
1379 #define FF_DEFAULT_QUANT_BIAS 999999
1380
1381 /**
1382 * inter quantizer bias.
1383 * - encoding: set by user.
1384 * - decoding: unused
1385 */
1386 int inter_quant_bias;
1387
1388 /**
1389 * color table ID.
1390 * - encoding: unused.
1391 * - decoding: which clrtable should be used for 8bit RGB images
1392 * table have to be stored somewhere FIXME
1393 */
1394 int color_table_id;
1395
1396 /**
1397 * internal_buffer count.
1398 * Dont touch, used by lavc default_get_buffer()
1399 */
1400 int internal_buffer_count;
1401
1402 /**
1403 * internal_buffers.
1404 * Dont touch, used by lavc default_get_buffer()
1405 */
1406 void *internal_buffer;
1407
1408 #define FF_LAMBDA_SHIFT 7
1409 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1410 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1411 #define FF_LAMBDA_MAX (256*128-1)
1412
1413 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1414 /**
1415 * global quality for codecs which cannot change it per frame.
1416 * this should be proportional to MPEG1/2/4 qscale.
1417 * - encoding: set by user.
1418 * - decoding: unused
1419 */
1420 int global_quality;
1421
1422 #define FF_CODER_TYPE_VLC 0
1423 #define FF_CODER_TYPE_AC 1
1424 /**
1425 * coder type
1426 * - encoding: set by user.
1427 * - decoding: unused
1428 */
1429 int coder_type;
1430
1431 /**
1432 * context model
1433 * - encoding: set by user.
1434 * - decoding: unused
1435 */
1436 int context_model;
1437
1438 /**
1439 * slice flags
1440 * - encoding: unused
1441 * - decoding: set by user.
1442 */
1443 int slice_flags;
1444 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1445 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1446 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1447
1448 /**
1449 * XVideo Motion Acceleration
1450 * - encoding: forbidden
1451 * - decoding: set by decoder
1452 */
1453 int xvmc_acceleration;
1454
1455 /**
1456 * macroblock decision mode
1457 * - encoding: set by user.
1458 * - decoding: unused
1459 */
1460 int mb_decision;
1461 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1462 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1463 #define FF_MB_DECISION_RD 2 ///< rate distoration
1464
1465 /**
1466 * custom intra quantization matrix
1467 * - encoding: set by user, can be NULL
1468 * - decoding: set by lavc
1469 */
1470 uint16_t *intra_matrix;
1471
1472 /**
1473 * custom inter quantization matrix
1474 * - encoding: set by user, can be NULL
1475 * - decoding: set by lavc
1476 */
1477 uint16_t *inter_matrix;
1478
1479 /**
1480 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1481 * this is used to workaround some encoder bugs
1482 * - encoding: unused
1483 * - decoding: set by user, will be converted to upper case by lavc during init
1484 */
1485 unsigned int stream_codec_tag;
1486
1487 /**
1488 * scene change detection threshold.
1489 * 0 is default, larger means fewer detected scene changes
1490 * - encoding: set by user.
1491 * - decoding: unused
1492 */
1493 int scenechange_threshold;
1494
1495 /**
1496 * minimum lagrange multipler
1497 * - encoding: set by user.
1498 * - decoding: unused
1499 */
1500 int lmin;
1501
1502 /**
1503 * maximum lagrange multipler
1504 * - encoding: set by user.
1505 * - decoding: unused
1506 */
1507 int lmax;
1508
1509 /**
1510 * Palette control structure
1511 * - encoding: ??? (no palette-enabled encoder yet)
1512 * - decoding: set by user.
1513 */
1514 struct AVPaletteControl *palctrl;
1515
1516 /**
1517 * noise reduction strength
1518 * - encoding: set by user.
1519 * - decoding: unused
1520 */
1521 int noise_reduction;
1522
1523 /**
1524 * called at the beginning of a frame to get cr buffer for it.
1525 * buffer type (size, hints) must be the same. lavc won't check it.
1526 * lavc will pass previous buffer in pic, function should return
1527 * same buffer or new buffer with old frame "painted" into it.
1528 * if pic.data[0] == NULL must behave like get_buffer().
1529 * - encoding: unused
1530 * - decoding: set by lavc, user can override
1531 */
1532 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1533
1534 /**
1535 * number of bits which should be loaded into the rc buffer before decoding starts
1536 * - encoding: set by user.
1537 * - decoding: unused
1538 */
1539 int rc_initial_buffer_occupancy;
1540
1541 /**
1542 *
1543 * - encoding: set by user.
1544 * - decoding: unused
1545 */
1546 int inter_threshold;
1547
1548 /**
1549 * CODEC_FLAG2_*.
1550 * - encoding: set by user.
1551 * - decoding: set by user.
1552 */
1553 int flags2;
1554
1555 /**
1556 * simulates errors in the bitstream to test error concealment.
1557 * - encoding: set by user.
1558 * - decoding: unused.
1559 */
1560 int error_rate;
1561
1562 /**
1563 * MP3 antialias algorithm, see FF_AA_* below.
1564 * - encoding: unused
1565 * - decoding: set by user
1566 */
1567 int antialias_algo;
1568 #define FF_AA_AUTO 0
1569 #define FF_AA_FASTINT 1 //not implemented yet
1570 #define FF_AA_INT 2
1571 #define FF_AA_FLOAT 3
1572 /**
1573 * Quantizer noise shaping.
1574 * - encoding: set by user
1575 * - decoding: unused
1576 */
1577 int quantizer_noise_shaping;
1578
1579 /**
1580 * Thread count.
1581 * is used to decide how many independant tasks should be passed to execute()
1582 * - encoding: set by user
1583 * - decoding: set by user
1584 */
1585 int thread_count;
1586
1587 /**
1588 * the codec may call this to execute several independant things. it will return only after
1589 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1590 * default implementation will execute the parts serially
1591 * @param count the number of things to execute
1592 * - encoding: set by lavc, user can override
1593 * - decoding: set by lavc, user can override
1594 */
1595 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1596
1597 /**
1598 * Thread opaque.
1599 * can be used by execute() to store some per AVCodecContext stuff.
1600 * - encoding: set by execute()
1601 * - decoding: set by execute()
1602 */
1603 void *thread_opaque;
1604
1605 /**
1606 * Motion estimation threshold. under which no motion estimation is
1607 * performed, but instead the user specified motion vectors are used
1608 *
1609 * - encoding: set by user
1610 * - decoding: unused
1611 */
1612 int me_threshold;
1613
1614 /**
1615 * Macroblock threshold. under which the user specified macroblock types will be used
1616 * - encoding: set by user
1617 * - decoding: unused
1618 */
1619 int mb_threshold;
1620
1621 /**
1622 * precision of the intra dc coefficient - 8.
1623 * - encoding: set by user
1624 * - decoding: unused
1625 */
1626 int intra_dc_precision;
1627
1628 /**
1629 * noise vs. sse weight for the nsse comparsion function.
1630 * - encoding: set by user
1631 * - decoding: unused
1632 */
1633 int nsse_weight;
1634
1635 /**
1636 * number of macroblock rows at the top which are skiped.
1637 * - encoding: unused
1638 * - decoding: set by user
1639 */
1640 int skip_top;
1641
1642 /**
1643 * number of macroblock rows at the bottom which are skiped.
1644 * - encoding: unused
1645 * - decoding: set by user
1646 */
1647 int skip_bottom;
1648
1649 /**
1650 * profile
1651 * - encoding: set by user
1652 * - decoding: set by lavc
1653 */
1654 int profile;
1655 #define FF_PROFILE_UNKNOWN -99
1656
1657 /**
1658 * level
1659 * - encoding: set by user
1660 * - decoding: set by lavc
1661 */
1662 int level;
1663 #define FF_LEVEL_UNKNOWN -99
1664
1665 /**
1666 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1667 * - encoding: unused
1668 * - decoding: set by user
1669 */
1670 int lowres;
1671
1672 /**
1673 * bistream width / height. may be different from width/height if lowres
1674 * or other things are used
1675 * - encoding: unused
1676 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1677 */
1678 int coded_width, coded_height;
1679 } AVCodecContext;
1680
1681
1682 /**
1683 * AVOption.
1684 */
1685 typedef struct AVOption {
1686 /** options' name */
1687 const char *name; /* if name is NULL, it indicates a link to next */
1688 /** short English text help or const struct AVOption* subpointer */
1689 const char *help; // const struct AVOption* sub;
1690 /** offset to context structure where the parsed value should be stored */
1691 int offset;
1692 /** options' type */
1693 int type;
1694 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1695 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1696 #define FF_OPT_TYPE_INT 3 ///< integer
1697 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1698 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1699 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1700 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1701 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1702 /** min value (min == max -> no limits) */
1703 double min;
1704 /** maximum value for double/int */
1705 double max;
1706 /** default boo [0,1]l/double/int value */
1707 double defval;
1708 /**
1709 * default string value (with optional semicolon delimited extra option-list
1710 * i.e. option1;option2;option3
1711 * defval might select other then first argument as default
1712 */
1713 const char *defstr;
1714 #define FF_OPT_MAX_DEPTH 10
1715 } AVOption;
1716
1717 /**
1718 * Parse option(s) and sets fields in passed structure
1719 * @param strct structure where the parsed results will be written
1720 * @param list list with AVOptions
1721 * @param opts string with options for parsing
1722 */
1723 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1724
1725
1726 /**
1727 * AVCodec.
1728 */
1729 typedef struct AVCodec {
1730 const char *name;
1731 enum CodecType type;
1732 int id;
1733 int priv_data_size;
1734 int (*init)(AVCodecContext *);
1735 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1736 int (*close)(AVCodecContext *);
1737 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1738 uint8_t *buf, int buf_size);
1739 int capabilities;
1740 const AVOption *options;
1741 struct AVCodec *next;
1742 void (*flush)(AVCodecContext *);
1743 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1744 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1745 } AVCodec;
1746
1747 /**
1748 * four components are given, that's all.
1749 * the last component is alpha
1750 */
1751 typedef struct AVPicture {
1752 uint8_t *data[4];
1753 int linesize[4]; ///< number of bytes per line
1754 } AVPicture;
1755
1756 /**
1757 * AVPaletteControl
1758 * This structure defines a method for communicating palette changes
1759 * between and demuxer and a decoder.
1760 */
1761 #define AVPALETTE_SIZE 1024
1762 #define AVPALETTE_COUNT 256
1763 typedef struct AVPaletteControl {
1764
1765 /* demuxer sets this to 1 to indicate the palette has changed;
1766 * decoder resets to 0 */
1767 int palette_changed;
1768
1769 /* 4-byte ARGB palette entries, stored in native byte order; note that
1770 * the individual palette components should be on a 8-bit scale; if
1771 * the palette data comes from a IBM VGA native format, the component
1772 * data is probably 6 bits in size and needs to be scaled */
1773 unsigned int palette[AVPALETTE_COUNT];
1774
1775 } AVPaletteControl;
1776
1777 extern AVCodec ac3_encoder;
1778 extern AVCodec mp2_encoder;
1779 extern AVCodec mp3lame_encoder;
1780 extern AVCodec oggvorbis_encoder;
1781 extern AVCodec faac_encoder;
1782 extern AVCodec xvid_encoder;
1783 extern AVCodec mpeg1video_encoder;
1784 extern AVCodec mpeg2video_encoder;
1785 extern AVCodec h263_encoder;
1786 extern AVCodec h263p_encoder;
1787 extern AVCodec flv_encoder;
1788 extern AVCodec rv10_encoder;
1789 extern AVCodec rv20_encoder;
1790 extern AVCodec dvvideo_encoder;
1791 extern AVCodec mjpeg_encoder;
1792 extern AVCodec ljpeg_encoder;
1793 extern AVCodec mpeg4_encoder;
1794 extern AVCodec msmpeg4v1_encoder;
1795 extern AVCodec msmpeg4v2_encoder;
1796 extern AVCodec msmpeg4v3_encoder;
1797 extern AVCodec wmv1_encoder;
1798 extern AVCodec wmv2_encoder;
1799 extern AVCodec huffyuv_encoder;
1800 extern AVCodec h264_encoder;
1801 extern AVCodec asv1_encoder;
1802 extern AVCodec asv2_encoder;
1803 extern AVCodec vcr1_encoder;
1804 extern AVCodec ffv1_encoder;
1805 extern AVCodec snow_encoder;
1806 extern AVCodec mdec_encoder;
1807 extern AVCodec zlib_encoder;
1808 extern AVCodec sonic_encoder;
1809 extern AVCodec sonic_ls_encoder;
1810 extern AVCodec svq1_encoder;
1811
1812 extern AVCodec h263_decoder;
1813 extern AVCodec h261_decoder;
1814 extern AVCodec mpeg4_decoder;
1815 extern AVCodec msmpeg4v1_decoder;
1816 extern AVCodec msmpeg4v2_decoder;
1817 extern AVCodec msmpeg4v3_decoder;
1818 extern AVCodec wmv1_decoder;
1819 extern AVCodec wmv2_decoder;
1820 extern AVCodec mpeg1video_decoder;
1821 extern AVCodec mpeg2video_decoder;
1822 extern AVCodec mpegvideo_decoder;
1823 extern AVCodec mpeg_xvmc_decoder;
1824 extern AVCodec h263i_decoder;
1825 extern AVCodec flv_decoder;
1826 extern AVCodec rv10_decoder;
1827 extern AVCodec rv20_decoder;
1828 extern AVCodec svq1_decoder;
1829 extern AVCodec svq3_decoder;
1830 extern AVCodec dvvideo_decoder;
1831 extern AVCodec wmav1_decoder;
1832 extern AVCodec wmav2_decoder;
1833 extern AVCodec mjpeg_decoder;
1834 extern AVCodec mjpegb_decoder;
1835 extern AVCodec sp5x_decoder;
1836 extern AVCodec mp2_decoder;
1837 extern AVCodec mp3_decoder;
1838 extern AVCodec mace3_decoder;
1839 extern AVCodec mace6_decoder;
1840 extern AVCodec huffyuv_decoder;
1841 extern AVCodec oggvorbis_decoder;
1842 extern AVCodec cyuv_decoder;
1843 extern AVCodec h264_decoder;
1844 extern AVCodec indeo3_decoder;
1845 extern AVCodec vp3_decoder;
1846 extern AVCodec theora_decoder;
1847 extern AVCodec amr_nb_decoder;
1848 extern AVCodec amr_nb_encoder;
1849 extern AVCodec amr_wb_encoder;
1850 extern AVCodec amr_wb_decoder;
1851 extern AVCodec aac_decoder;
1852 extern AVCodec mpeg4aac_decoder;
1853 extern AVCodec asv1_decoder;
1854 extern AVCodec asv2_decoder;
1855 extern AVCodec vcr1_decoder;
1856 extern AVCodec cljr_decoder;
1857 extern AVCodec ffv1_decoder;
1858 extern AVCodec snow_decoder;
1859 extern AVCodec fourxm_decoder;
1860 extern AVCodec mdec_decoder;
1861 extern AVCodec roq_decoder;
1862 extern AVCodec interplay_video_decoder;
1863 extern AVCodec xan_wc3_decoder;
1864 extern AVCodec rpza_decoder;
1865 extern AVCodec cinepak_decoder;
1866 extern AVCodec msrle_decoder;
1867 extern AVCodec msvideo1_decoder;
1868 extern AVCodec vqa_decoder;
1869 extern AVCodec idcin_decoder;
1870 extern AVCodec eightbps_decoder;
1871 extern AVCodec smc_decoder;
1872 extern AVCodec flic_decoder;
1873 extern AVCodec vmdvideo_decoder;
1874 extern AVCodec vmdaudio_decoder;
1875 extern AVCodec truemotion1_decoder;
1876 extern AVCodec mszh_decoder;
1877 extern AVCodec zlib_decoder;
1878 extern AVCodec ra_144_decoder;
1879 extern AVCodec ra_288_decoder;
1880 extern AVCodec roq_dpcm_decoder;
1881 extern AVCodec interplay_dpcm_decoder;
1882 extern AVCodec xan_dpcm_decoder;
1883 extern AVCodec sol_dpcm_decoder;
1884 extern AVCodec sonic_decoder;
1885 extern AVCodec qtrle_decoder;
1886 extern AVCodec flac_decoder;
1887 extern AVCodec tscc_decoder;
1888 extern AVCodec ulti_decoder;
1889 extern AVCodec qdraw_decoder;
1890
1891 /* pcm codecs */
1892 #define PCM_CODEC(id, name) \
1893 extern AVCodec name ## _decoder; \
1894 extern AVCodec name ## _encoder
1895
1896 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1897 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1898 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1899 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1900 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1901 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1902 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1903 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1904
1905 /* adpcm codecs */
1906
1907 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1908 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1909 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1910 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1911 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1912 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
1913 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1914 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1915 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1916 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1917 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
1918 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
1919
1920 #undef PCM_CODEC
1921
1922 /* dummy raw video codec */
1923 extern AVCodec rawvideo_encoder;
1924 extern AVCodec rawvideo_decoder;
1925
1926 /* the following codecs use external GPL libs */
1927 extern AVCodec ac3_decoder;
1928 extern AVCodec dts_decoder;
1929
1930 /* resample.c */
1931
1932 struct ReSampleContext;
1933 struct AVResampleContext;
1934
1935 typedef struct ReSampleContext ReSampleContext;
1936
1937 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1938 int output_rate, int input_rate);
1939 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1940 void audio_resample_close(ReSampleContext *s);
1941
1942 struct AVResampleContext *av_resample_init(int out_rate, int in_rate);
1943 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
1944 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
1945 void av_resample_close(struct AVResampleContext *c);
1946
1947 /* YUV420 format is assumed ! */
1948
1949 struct ImgReSampleContext;
1950
1951 typedef struct ImgReSampleContext ImgReSampleContext;
1952
1953 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1954 int input_width, int input_height);
1955
1956 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1957 int iwidth, int iheight,
1958 int topBand, int bottomBand,
1959 int leftBand, int rightBand,
1960 int padtop, int padbottom,
1961 int padleft, int padright);
1962
1963
1964 void img_resample(ImgReSampleContext *s,
1965 AVPicture *output, const AVPicture *input);
1966
1967 void img_resample_close(ImgReSampleContext *s);
1968
1969 /**
1970 * Allocate memory for a picture. Call avpicture_free to free it.
1971 *
1972 * @param picture the picture to be filled in.
1973 * @param pix_fmt the format of the picture.
1974 * @param width the width of the picture.
1975 * @param height the height of the picture.
1976 * @return 0 if successful, -1 if not.
1977 */
1978 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1979
1980 /* Free a picture previously allocated by avpicture_alloc. */
1981 void avpicture_free(AVPicture *picture);
1982
1983 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1984 int pix_fmt, int width, int height);
1985 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1986 unsigned char *dest, int dest_size);
1987 int avpicture_get_size(int pix_fmt, int width, int height);
1988 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1989 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1990 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
1991 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1992
1993 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1994 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1995 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1996 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1997 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1998 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1999
2000 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2001 int has_alpha);
2002 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2003 int has_alpha, int *loss_ptr);
2004
2005 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2006 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2007 int img_get_alpha_info(const AVPicture *src,
2008 int pix_fmt, int width, int height);
2009
2010 /* convert among pixel formats */
2011 int img_convert(AVPicture *dst, int dst_pix_fmt,
2012 const AVPicture *src, int pix_fmt,
2013 int width, int height);
2014
2015 /* deinterlace a picture */
2016 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2017 int pix_fmt, int width, int height);
2018
2019 /* external high level API */
2020
2021 extern AVCodec *first_avcodec;
2022
2023 /* returns LIBAVCODEC_VERSION_INT constant */
2024 unsigned avcodec_version(void);
2025 /* returns LIBAVCODEC_BUILD constant */
2026 unsigned avcodec_build(void);
2027 void avcodec_init(void);
2028
2029 void register_avcodec(AVCodec *format);
2030 AVCodec *avcodec_find_encoder(enum CodecID id);
2031 AVCodec *avcodec_find_encoder_by_name(const char *name);
2032 AVCodec *avcodec_find_decoder(enum CodecID id);
2033 AVCodec *avcodec_find_decoder_by_name(const char *name);
2034 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2035
2036 void avcodec_get_context_defaults(AVCodecContext *s);
2037 AVCodecContext *avcodec_alloc_context(void);
2038 void avcodec_get_frame_defaults(AVFrame *pic);
2039 AVFrame *avcodec_alloc_frame(void);
2040
2041 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2042 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2043 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2044 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2045 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2046
2047 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2048 void avcodec_thread_free(AVCodecContext *s);
2049 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2050 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2051 //FIXME func typedef
2052
2053 /**
2054 * opens / inits the AVCodecContext.
2055 * not thread save!
2056 */
2057 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2058
2059 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2060 int *frame_size_ptr,
2061 uint8_t *buf, int buf_size);
2062 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2063 int *got_picture_ptr,
2064 uint8_t *buf, int buf_size);
2065 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2066 int *data_size_ptr,
2067 uint8_t *buf, int buf_size);
2068 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2069 const short *samples);
2070 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2071 const AVFrame *pict);
2072
2073 int avcodec_close(AVCodecContext *avctx);
2074
2075 void avcodec_register_all(void);
2076
2077 void avcodec_flush_buffers(AVCodecContext *avctx);
2078
2079 /* misc usefull functions */
2080
2081 /**
2082 * returns a single letter to describe the picture type
2083 */
2084 char av_get_pict_type_char(int pict_type);
2085
2086 /**
2087 * reduce a fraction.
2088 * this is usefull for framerate calculations
2089 * @param max the maximum allowed for dst_nom & dst_den
2090 * @return 1 if exact, 0 otherwise
2091 */
2092 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2093
2094 /**
2095 * rescale a 64bit integer with rounding to nearest.
2096 * a simple a*b/c isnt possible as it can overflow
2097 */
2098 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2099
2100 /**
2101 * rescale a 64bit integer with specified rounding.
2102 * a simple a*b/c isnt possible as it can overflow
2103 */
2104 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
2105
2106 /* frame parsing */
2107 typedef struct AVCodecParserContext {
2108 void *priv_data;
2109 struct AVCodecParser *parser;
2110 int64_t frame_offset; /* offset of the current frame */
2111 int64_t cur_offset; /* current offset
2112 (incremented by each av_parser_parse()) */
2113 int64_t last_frame_offset; /* offset of the last frame */
2114 /* video info */
2115 int pict_type; /* XXX: put it back in AVCodecContext */
2116 int repeat_pict; /* XXX: put it back in AVCodecContext */
2117 int64_t pts; /* pts of the current frame */
2118 int64_t dts; /* dts of the current frame */
2119
2120 /* private data */
2121 int64_t last_pts;
2122 int64_t last_dts;
2123 int fetch_timestamp;
2124
2125 #define AV_PARSER_PTS_NB 4
2126 int cur_frame_start_index;
2127 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2128 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2129 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2130 } AVCodecParserContext;
2131
2132 typedef struct AVCodecParser {
2133 int codec_ids[3]; /* several codec IDs are permitted */
2134 int priv_data_size;
2135 int (*parser_init)(AVCodecParserContext *s);
2136 int (*parser_parse)(AVCodecParserContext *s,
2137 AVCodecContext *avctx,
2138 uint8_t **poutbuf, int *poutbuf_size,
2139 const uint8_t *buf, int buf_size);
2140 void (*parser_close)(AVCodecParserContext *s);
2141 struct AVCodecParser *next;
2142 } AVCodecParser;
2143
2144 extern AVCodecParser *av_first_parser;
2145
2146 void av_register_codec_parser(AVCodecParser *parser);
2147 AVCodecParserContext *av_parser_init(int codec_id);
2148 int av_parser_parse(AVCodecParserContext *s,
2149 AVCodecContext *avctx,
2150 uint8_t **poutbuf, int *poutbuf_size,
2151 const uint8_t *buf, int buf_size,
2152 int64_t pts, int64_t dts);
2153 void av_parser_close(AVCodecParserContext *s);
2154
2155 extern AVCodecParser mpegvideo_parser;
2156 extern AVCodecParser mpeg4video_parser;
2157 extern AVCodecParser h261_parser;
2158 extern AVCodecParser h263_parser;
2159 extern AVCodecParser h264_parser;
2160 extern AVCodecParser mpegaudio_parser;
2161 extern AVCodecParser ac3_parser;
2162
2163 /* memory */
2164 void *av_malloc(unsigned int size);
2165 void *av_mallocz(unsigned int size);
2166 void *av_realloc(void *ptr, unsigned int size);
2167 void av_free(void *ptr);
2168 char *av_strdup(const char *s);
2169 void av_freep(void *ptr);
2170 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2171 /* for static data only */
2172 /* call av_free_static to release all staticaly allocated tables */
2173 void av_free_static(void);
2174 void *av_mallocz_static(unsigned int size);
2175
2176 /* add by bero : in adx.c */
2177 int is_adx(const unsigned char *buf,size_t bufsize);
2178
2179 void img_copy(AVPicture *dst, const AVPicture *src,
2180 int pix_fmt, int width, int height);
2181
2182 /* av_log API */
2183
2184 #include <stdarg.h>
2185
2186 #define AV_LOG_QUIET -1
2187 #define AV_LOG_ERROR 0
2188 #define AV_LOG_INFO 1
2189 #define AV_LOG_DEBUG 2
2190
2191 #ifdef __GNUC__
2192 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2193 #else
2194 extern void av_log(void*, int level, const char *fmt, ...);
2195 #endif
2196
2197 extern void av_vlog(void*, int level, const char *fmt, va_list);
2198 extern int av_log_get_level(void);
2199 extern void av_log_set_level(int);
2200 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2201
2202 /* endian macros */
2203 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2204 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2205 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2206 (((uint8_t*)(x))[1] << 16) | \
2207 (((uint8_t*)(x))[2] << 8) | \
2208 ((uint8_t*)(x))[3])
2209 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2210 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2211 (((uint8_t*)(x))[2] << 16) | \
2212 (((uint8_t*)(x))[1] << 8) | \
2213 ((uint8_t*)(x))[0])
2214 #endif
2215
2216 #ifdef __cplusplus
2217 }
2218 #endif
2219
2220 #endif /* AVCODEC_H */