81068046c14007c7deff783a0523ea5cb3dad51a
[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 4746
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_MJPEG,
42 CODEC_ID_MJPEGB,
43 CODEC_ID_LJPEG,
44 CODEC_ID_SP5X,
45 CODEC_ID_MPEG4,
46 CODEC_ID_RAWVIDEO,
47 CODEC_ID_MSMPEG4V1,
48 CODEC_ID_MSMPEG4V2,
49 CODEC_ID_MSMPEG4V3,
50 CODEC_ID_WMV1,
51 CODEC_ID_WMV2,
52 CODEC_ID_H263P,
53 CODEC_ID_H263I,
54 CODEC_ID_FLV1,
55 CODEC_ID_SVQ1,
56 CODEC_ID_SVQ3,
57 CODEC_ID_DVVIDEO,
58 CODEC_ID_HUFFYUV,
59 CODEC_ID_CYUV,
60 CODEC_ID_H264,
61 CODEC_ID_INDEO3,
62 CODEC_ID_VP3,
63 CODEC_ID_THEORA,
64 CODEC_ID_ASV1,
65 CODEC_ID_ASV2,
66 CODEC_ID_FFV1,
67 CODEC_ID_4XM,
68 CODEC_ID_VCR1,
69 CODEC_ID_CLJR,
70 CODEC_ID_MDEC,
71 CODEC_ID_ROQ,
72 CODEC_ID_INTERPLAY_VIDEO,
73 CODEC_ID_XAN_WC3,
74 CODEC_ID_XAN_WC4,
75 CODEC_ID_RPZA,
76 CODEC_ID_CINEPAK,
77 CODEC_ID_WS_VQA,
78 CODEC_ID_MSRLE,
79 CODEC_ID_MSVIDEO1,
80 CODEC_ID_IDCIN,
81 CODEC_ID_8BPS,
82 CODEC_ID_SMC,
83 CODEC_ID_FLIC,
84 CODEC_ID_TRUEMOTION1,
85 CODEC_ID_VMDVIDEO,
86 CODEC_ID_MSZH,
87 CODEC_ID_ZLIB,
88 CODEC_ID_QTRLE,
89 CODEC_ID_SNOW,
90 CODEC_ID_TSCC,
91 CODEC_ID_ULTI,
92 CODEC_ID_QDRAW,
93 CODEC_ID_VIXL,
94 CODEC_ID_QPEG,
95 CODEC_ID_XVID,
96 CODEC_ID_PNG,
97 CODEC_ID_PPM,
98 CODEC_ID_PBM,
99 CODEC_ID_PGM,
100 CODEC_ID_PGMYUV,
101 CODEC_ID_PAM,
102 CODEC_ID_FFVHUFF,
103 CODEC_ID_RV30,
104 CODEC_ID_RV40,
105 CODEC_ID_VC9,
106 CODEC_ID_WMV3,
107 CODEC_ID_LOCO,
108
109 /* various pcm "codecs" */
110 CODEC_ID_PCM_S16LE= 0x10000,
111 CODEC_ID_PCM_S16BE,
112 CODEC_ID_PCM_U16LE,
113 CODEC_ID_PCM_U16BE,
114 CODEC_ID_PCM_S8,
115 CODEC_ID_PCM_U8,
116 CODEC_ID_PCM_MULAW,
117 CODEC_ID_PCM_ALAW,
118
119 /* various adpcm codecs */
120 CODEC_ID_ADPCM_IMA_QT= 0x11000,
121 CODEC_ID_ADPCM_IMA_WAV,
122 CODEC_ID_ADPCM_IMA_DK3,
123 CODEC_ID_ADPCM_IMA_DK4,
124 CODEC_ID_ADPCM_IMA_WS,
125 CODEC_ID_ADPCM_IMA_SMJPEG,
126 CODEC_ID_ADPCM_MS,
127 CODEC_ID_ADPCM_4XM,
128 CODEC_ID_ADPCM_XA,
129 CODEC_ID_ADPCM_ADX,
130 CODEC_ID_ADPCM_EA,
131 CODEC_ID_ADPCM_G726,
132 CODEC_ID_ADPCM_CT,
133 CODEC_ID_ADPCM_SWF,
134
135 /* AMR */
136 CODEC_ID_AMR_NB= 0x12000,
137 CODEC_ID_AMR_WB,
138
139 /* RealAudio codecs*/
140 CODEC_ID_RA_144= 0x13000,
141 CODEC_ID_RA_288,
142
143 /* various DPCM codecs */
144 CODEC_ID_ROQ_DPCM= 0x14000,
145 CODEC_ID_INTERPLAY_DPCM,
146 CODEC_ID_XAN_DPCM,
147 CODEC_ID_SOL_DPCM,
148
149 CODEC_ID_MP2= 0x15000,
150 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
151 CODEC_ID_AAC,
152 CODEC_ID_MPEG4AAC,
153 CODEC_ID_AC3,
154 CODEC_ID_DTS,
155 CODEC_ID_VORBIS,
156 CODEC_ID_DVAUDIO,
157 CODEC_ID_WMAV1,
158 CODEC_ID_WMAV2,
159 CODEC_ID_MACE3,
160 CODEC_ID_MACE6,
161 CODEC_ID_VMDAUDIO,
162 CODEC_ID_SONIC,
163 CODEC_ID_SONIC_LS,
164 CODEC_ID_FLAC,
165 CODEC_ID_MP3ADU,
166 CODEC_ID_MP3ON4,
167 CODEC_ID_SHORTEN,
168 CODEC_ID_ALAC,
169
170 CODEC_ID_OGGTHEORA= 0x16000,
171
172 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
173 stream (only used by libavformat) */
174 };
175
176 /* CODEC_ID_MP3LAME is absolete */
177 #define CODEC_ID_MP3LAME CODEC_ID_MP3
178
179 enum CodecType {
180 CODEC_TYPE_UNKNOWN = -1,
181 CODEC_TYPE_VIDEO,
182 CODEC_TYPE_AUDIO,
183 CODEC_TYPE_DATA,
184 };
185
186 /**
187 * Pixel format. Notes:
188 *
189 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
190 * color is put together as:
191 * (A << 24) | (R << 16) | (G << 8) | B
192 * This is stored as BGRA on little endian CPU architectures and ARGB on
193 * big endian CPUs.
194 *
195 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
196 * image data is stored in AVFrame.data[0]. The palette is transported in
197 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
198 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
199 * also endian-specific). Note also that the individual RGB palette
200 * components stored in AVFrame.data[1] should be in the range 0..255.
201 * This is important as many custom PAL8 video codecs that were designed
202 * to run on the IBM VGA graphics adapter use 6-bit palette components.
203 */
204 enum PixelFormat {
205 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
206 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
207 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
208 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
209 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
210 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
211 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
212 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
213 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
214 PIX_FMT_RGB565, ///< always stored in cpu endianness
215 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
216 PIX_FMT_GRAY8,
217 PIX_FMT_MONOWHITE, ///< 0 is white
218 PIX_FMT_MONOBLACK, ///< 0 is black
219 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
220 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
221 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
222 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
223 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
224 PIX_FMT_XVMC_MPEG2_IDCT,
225 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
226 PIX_FMT_UYVY411, ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
227 PIX_FMT_NB,
228 };
229
230 /* currently unused, may be used if 24/32 bits samples ever supported */
231 enum SampleFormat {
232 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
233 SAMPLE_FMT_S32, ///< signed 32 bits
234 SAMPLE_FMT_FLT, ///< float
235 SAMPLE_FMT_DBL, ///< double
236 };
237
238 /* in bytes */
239 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
240
241 /**
242 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
243 * this is mainly needed because some optimized bitstream readers read
244 * 32 or 64 bit at once and could read over the end<br>
245 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
246 * MPEG bitstreams could cause overread and segfault
247 */
248 #define FF_INPUT_BUFFER_PADDING_SIZE 8
249
250 /**
251 * minimum encoding buffer size.
252 * used to avoid some checks during header writing
253 */
254 #define FF_MIN_BUFFER_SIZE 16384
255
256 /* motion estimation type, EPZS by default */
257 enum Motion_Est_ID {
258 ME_ZERO = 1,
259 ME_FULL,
260 ME_LOG,
261 ME_PHODS,
262 ME_EPZS,
263 ME_X1
264 };
265
266 enum AVRounding {
267 AV_ROUND_ZERO = 0, ///< round toward zero
268 AV_ROUND_INF = 1, ///< round away from zero
269 AV_ROUND_DOWN = 2, ///< round toward -infinity
270 AV_ROUND_UP = 3, ///< round toward +infinity
271 AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
272 };
273
274 typedef struct RcOverride{
275 int start_frame;
276 int end_frame;
277 int qscale; // if this is 0 then quality_factor will be used instead
278 float quality_factor;
279 } RcOverride;
280
281 /* only for ME compatiblity with old apps */
282 extern int motion_estimation_method;
283
284 #define FF_MAX_B_FRAMES 8
285
286 /* encoding support
287 these flags can be passed in AVCodecContext.flags before initing
288 Note: note not everything is supported yet
289 */
290
291 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
292 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
293 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
294 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
295 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
296 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
297 /* parent program gurantees that the input for b-frame containing streams is not written to
298 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
299 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
300 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
301 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
302 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
303 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
304 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
305 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
306 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
307 of only at frame boundaries */
308 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
309 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
310 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
311 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
312 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
313 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
314 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
315 /* Fx : Flag for h263+ extra options */
316 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
317 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
318 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
319 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
320 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
321 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
322 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
323 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
324 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
325 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
326 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
327 #define CODEC_FLAG_CLOSED_GOP 0x80000000
328 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
329 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
330 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
331
332 /* Unsupported options :
333 * Syntax Arithmetic coding (SAC)
334 * Reference Picture Selection
335 * Independant Segment Decoding */
336 /* /Fx */
337 /* codec capabilities */
338
339 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
340 /**
341 * Codec uses get_buffer() for allocating buffers.
342 * direct rendering method 1
343 */
344 #define CODEC_CAP_DR1 0x0002
345 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
346 used */
347 #define CODEC_CAP_PARSE_ONLY 0x0004
348 #define CODEC_CAP_TRUNCATED 0x0008
349 /* codec can export data for HW decoding (XvMC) */
350 #define CODEC_CAP_HWACCEL 0x0010
351 /**
352 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
353 * if this is not set, the codec is guranteed to never be feeded with NULL data
354 */
355 #define CODEC_CAP_DELAY 0x0020
356
357 //the following defines might change, so dont expect compatibility if u use them
358 #define MB_TYPE_INTRA4x4 0x0001
359 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
360 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
361 #define MB_TYPE_16x16 0x0008
362 #define MB_TYPE_16x8 0x0010
363 #define MB_TYPE_8x16 0x0020
364 #define MB_TYPE_8x8 0x0040
365 #define MB_TYPE_INTERLACED 0x0080
366 #define MB_TYPE_DIRECT2 0x0100 //FIXME
367 #define MB_TYPE_ACPRED 0x0200
368 #define MB_TYPE_GMC 0x0400
369 #define MB_TYPE_SKIP 0x0800
370 #define MB_TYPE_P0L0 0x1000
371 #define MB_TYPE_P1L0 0x2000
372 #define MB_TYPE_P0L1 0x4000
373 #define MB_TYPE_P1L1 0x8000
374 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
375 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
376 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
377 #define MB_TYPE_QUANT 0x00010000
378 #define MB_TYPE_CBP 0x00020000
379 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
380
381 /**
382 * Pan Scan area.
383 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
384 */
385 typedef struct AVPanScan{
386 /**
387 * id.
388 * - encoding: set by user.
389 * - decoding: set by lavc
390 */
391 int id;
392
393 /**
394 * width and height in 1/16 pel
395 * - encoding: set by user.
396 * - decoding: set by lavc
397 */
398 int width;
399 int height;
400
401 /**
402 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
403 * - encoding: set by user.
404 * - decoding: set by lavc
405 */
406 int16_t position[3][2];
407 }AVPanScan;
408
409 #define FF_COMMON_FRAME \
410 /**\
411 * pointer to the picture planes.\
412 * this might be different from the first allocated byte\
413 * - encoding: \
414 * - decoding: \
415 */\
416 uint8_t *data[4];\
417 int linesize[4];\
418 /**\
419 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
420 * this isnt used by lavc unless the default get/release_buffer() is used\
421 * - encoding: \
422 * - decoding: \
423 */\
424 uint8_t *base[4];\
425 /**\
426 * 1 -> keyframe, 0-> not\
427 * - encoding: set by lavc\
428 * - decoding: set by lavc\
429 */\
430 int key_frame;\
431 \
432 /**\
433 * picture type of the frame, see ?_TYPE below.\
434 * - encoding: set by lavc for coded_picture (and set by user for input)\
435 * - decoding: set by lavc\
436 */\
437 int pict_type;\
438 \
439 /**\
440 * presentation timestamp in AV_TIME_BASE (=micro seconds currently) (time when frame should be shown to user)\
441 * if AV_NOPTS_VALUE then the frame_rate will be used as reference\
442 * - encoding: MUST be set by user\
443 * - decoding: set by lavc\
444 */\
445 int64_t pts;\
446 \
447 /**\
448 * picture number in bitstream order.\
449 * - encoding: set by\
450 * - decoding: set by lavc\
451 */\
452 int coded_picture_number;\
453 /**\
454 * picture number in display order.\
455 * - encoding: set by\
456 * - decoding: set by lavc\
457 */\
458 int display_picture_number;\
459 \
460 /**\
461 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
462 * - encoding: set by lavc for coded_picture (and set by user for input)\
463 * - decoding: set by lavc\
464 */\
465 int quality; \
466 \
467 /**\
468 * buffer age (1->was last buffer and dint change, 2->..., ...).\
469 * set to INT_MAX if the buffer has not been used yet \
470 * - encoding: unused\
471 * - decoding: MUST be set by get_buffer()\
472 */\
473 int age;\
474 \
475 /**\
476 * is this picture used as reference\
477 * - encoding: unused\
478 * - decoding: set by lavc (before get_buffer() call))\
479 */\
480 int reference;\
481 \
482 /**\
483 * QP table\
484 * - encoding: unused\
485 * - decoding: set by lavc\
486 */\
487 int8_t *qscale_table;\
488 /**\
489 * QP store stride\
490 * - encoding: unused\
491 * - decoding: set by lavc\
492 */\
493 int qstride;\
494 \
495 /**\
496 * mbskip_table[mb]>=1 if MB didnt change\
497 * stride= mb_width = (width+15)>>4\
498 * - encoding: unused\
499 * - decoding: set by lavc\
500 */\
501 uint8_t *mbskip_table;\
502 \
503 /**\
504 * Motion vector table.\
505 * @code\
506 * example:\
507 * int mv_sample_log2= 4 - motion_subsample_log2;\
508 * int mb_width= (width+15)>>4;\
509 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
510 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
511 * @endcode\
512 * - encoding: set by user\
513 * - decoding: set by lavc\
514 */\
515 int16_t (*motion_val[2])[2];\
516 \
517 /**\
518 * Macroblock type table\
519 * mb_type_base + mb_width + 2\
520 * - encoding: set by user\
521 * - decoding: set by lavc\
522 */\
523 uint32_t *mb_type;\
524 \
525 /**\
526 * log2 of the size of the block which a single vector in motion_val represents: \
527 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
528 * - encoding: unused\
529 * - decoding: set by lavc\
530 */\
531 uint8_t motion_subsample_log2;\
532 \
533 /**\
534 * for some private data of the user\
535 * - encoding: unused\
536 * - decoding: set by user\
537 */\
538 void *opaque;\
539 \
540 /**\
541 * error\
542 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
543 * - decoding: unused\
544 */\
545 uint64_t error[4];\
546 \
547 /**\
548 * type of the buffer (to keep track of who has to dealloc data[*])\
549 * - encoding: set by the one who allocs it\
550 * - decoding: set by the one who allocs it\
551 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
552 */\
553 int type;\
554 \
555 /**\
556 * when decoding, this signal how much the picture must be delayed.\
557 * extra_delay = repeat_pict / (2*fps)\
558 * - encoding: unused\
559 * - decoding: set by lavc\
560 */\
561 int repeat_pict;\
562 \
563 /**\
564 * \
565 */\
566 int qscale_type;\
567 \
568 /**\
569 * The content of the picture is interlaced.\
570 * - encoding: set by user\
571 * - decoding: set by lavc (default 0)\
572 */\
573 int interlaced_frame;\
574 \
575 /**\
576 * if the content is interlaced, is top field displayed first.\
577 * - encoding: set by user\
578 * - decoding: set by lavc\
579 */\
580 int top_field_first;\
581 \
582 /**\
583 * Pan scan.\
584 * - encoding: set by user\
585 * - decoding: set by lavc\
586 */\
587 AVPanScan *pan_scan;\
588 \
589 /**\
590 * tell user application that palette has changed from previous frame.\
591 * - encoding: ??? (no palette-enabled encoder yet)\
592 * - decoding: set by lavc (default 0)\
593 */\
594 int palette_has_changed;\
595 \
596 /**\
597 * Codec suggestion on buffer type if != 0\
598 * - encoding: unused\
599 * - decoding: set by lavc (before get_buffer() call))\
600 */\
601 int buffer_hints;\
602 \
603 /**\
604 * DCT coeffitients\
605 * - encoding: unused\
606 * - decoding: set by lavc\
607 */\
608 short *dct_coeff;\
609 \
610 /**\
611 * Motion referece frame index\
612 * - encoding: set by user\
613 * - decoding: set by lavc\
614 */\
615 int8_t *ref_index[2];
616
617 #define FF_QSCALE_TYPE_MPEG1 0
618 #define FF_QSCALE_TYPE_MPEG2 1
619
620 #define FF_BUFFER_TYPE_INTERNAL 1
621 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
622 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
623 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
624
625
626 #define FF_I_TYPE 1 // Intra
627 #define FF_P_TYPE 2 // Predicted
628 #define FF_B_TYPE 3 // Bi-dir predicted
629 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
630 #define FF_SI_TYPE 5
631 #define FF_SP_TYPE 6
632
633 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
634 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
635 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
636 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
637
638 /**
639 * Audio Video Frame.
640 */
641 typedef struct AVFrame {
642 FF_COMMON_FRAME
643 } AVFrame;
644
645 #define DEFAULT_FRAME_RATE_BASE 1001000
646
647 /**
648 * Used by av_log
649 */
650 typedef struct AVCLASS AVClass;
651 struct AVCLASS {
652 const char* class_name;
653 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
654 or AVFormatContext, which begin with an AVClass.
655 Needed because av_log is in libavcodec and has no visibility
656 of AVIn/OutputFormat */
657 };
658
659 /**
660 * main external api structure.
661 */
662 typedef struct AVCodecContext {
663 /**
664 * Info on struct for av_log
665 * - set by avcodec_alloc_context
666 */
667 AVClass *av_class;
668 /**
669 * the average bitrate.
670 * - encoding: set by user. unused for constant quantizer encoding
671 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
672 */
673 int bit_rate;
674
675 /**
676 * number of bits the bitstream is allowed to diverge from the reference.
677 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
678 * - encoding: set by user. unused for constant quantizer encoding
679 * - decoding: unused
680 */
681 int bit_rate_tolerance;
682
683 /**
684 * CODEC_FLAG_*.
685 * - encoding: set by user.
686 * - decoding: set by user.
687 */
688 int flags;
689
690 /**
691 * some codecs needs additionnal format info. It is stored here
692 * - encoding: set by user.
693 * - decoding: set by lavc. (FIXME is this ok?)
694 */
695 int sub_id;
696
697 /**
698 * motion estimation algorithm used for video coding.
699 * - encoding: MUST be set by user.
700 * - decoding: unused
701 */
702 int me_method;
703
704 /**
705 * some codecs need / can use extra-data like huffman tables.
706 * mjpeg: huffman tables
707 * rv10: additional flags
708 * mpeg4: global headers (they can be in the bitstream or here)
709 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
710 * then extradata_size to avoid prolems if its read with the bitstream reader
711 * - encoding: set/allocated/freed by lavc.
712 * - decoding: set/allocated/freed by user.
713 */
714 void *extradata;
715 int extradata_size;
716
717 /* video only */
718 /**
719 * frames per sec multiplied by frame_rate_base.
720 * for variable fps this is the precission, so if the timestamps
721 * can be specified in msec precssion then this is 1000*frame_rate_base
722 * - encoding: MUST be set by user
723 * - decoding: set by lavc. 0 or the frame_rate if available
724 */
725 int frame_rate;
726
727 /**
728 * picture width / height.
729 * - encoding: MUST be set by user.
730 * - decoding: set by lavc.
731 * Note, for compatibility its possible to set this instead of
732 * coded_width/height before decoding
733 */
734 int width, height;
735
736 #define FF_ASPECT_EXTENDED 15
737
738 /**
739 * the number of pictures in a group of pitures, or 0 for intra_only.
740 * - encoding: set by user.
741 * - decoding: unused
742 */
743 int gop_size;
744
745 /**
746 * pixel format, see PIX_FMT_xxx.
747 * - encoding: set by user.
748 * - decoding: set by lavc.
749 */
750 enum PixelFormat pix_fmt;
751
752 /**
753 * Frame rate emulation. If not zero lower layer (i.e. format handler)
754 * has to read frames at native frame rate.
755 * - encoding: set by user.
756 * - decoding: unused.
757 */
758 int rate_emu;
759
760 /**
761 * if non NULL, 'draw_horiz_band' is called by the libavcodec
762 * decoder to draw an horizontal band. It improve cache usage. Not
763 * all codecs can do that. You must check the codec capabilities
764 * before
765 * - encoding: unused
766 * - decoding: set by user.
767 * @param height the height of the slice
768 * @param y the y position of the slice
769 * @param type 1->top field, 2->bottom field, 3->frame
770 * @param offset offset into the AVFrame.data from which the slice should be read
771 */
772 void (*draw_horiz_band)(struct AVCodecContext *s,
773 const AVFrame *src, int offset[4],
774 int y, int type, int height);
775
776 /* audio only */
777 int sample_rate; ///< samples per sec
778 int channels;
779
780 /**
781 * audio sample format.
782 * - encoding: set by user.
783 * - decoding: set by lavc.
784 */
785 enum SampleFormat sample_fmt; ///< sample format, currenly unused
786
787 /* the following data should not be initialized */
788 int frame_size; ///< in samples, initialized when calling 'init'
789 int frame_number; ///< audio or video frame number
790 int real_pict_num; ///< returns the real picture number of previous encoded frame
791
792 /**
793 * number of frames the decoded output will be delayed relative to
794 * the encoded input.
795 * - encoding: set by lavc.
796 * - decoding: unused
797 */
798 int delay;
799
800 /* - encoding parameters */
801 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
802 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
803
804 /**
805 * minimum quantizer.
806 * - encoding: set by user.
807 * - decoding: unused
808 */
809 int qmin;
810
811 /**
812 * maximum quantizer.
813 * - encoding: set by user.
814 * - decoding: unused
815 */
816 int qmax;
817
818 /**
819 * maximum quantizer difference etween frames.
820 * - encoding: set by user.
821 * - decoding: unused
822 */
823 int max_qdiff;
824
825 /**
826 * maximum number of b frames between non b frames.
827 * note: the output will be delayed by max_b_frames+1 relative to the input
828 * - encoding: set by user.
829 * - decoding: unused
830 */
831 int max_b_frames;
832
833 /**
834 * qscale factor between ip and b frames.
835 * - encoding: set by user.
836 * - decoding: unused
837 */
838 float b_quant_factor;
839
840 /** obsolete FIXME remove */
841 int rc_strategy;
842 int b_frame_strategy;
843
844 /**
845 * hurry up amount.
846 * - encoding: unused
847 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
848 */
849 int hurry_up;
850
851 struct AVCodec *codec;
852
853 void *priv_data;
854
855 /* unused, FIXME remove*/
856 int rtp_mode;
857
858 int rtp_payload_size; /* The size of the RTP payload, the coder will */
859 /* do it's best to deliver a chunk with size */
860 /* below rtp_payload_size, the chunk will start */
861 /* with a start code on some codecs like H.263 */
862 /* This doesn't take account of any particular */
863 /* headers inside the transmited RTP payload */
864
865
866 /* The RTP callcack: This function is called */
867 /* every time the encoder as a packet to send */
868 /* Depends on the encoder if the data starts */
869 /* with a Start Code (it should) H.263 does. */
870 /* mb_nb contains the number of macroblocks */
871 /* encoded in the RTP payload */
872 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
873
874 /* statistics, used for 2-pass encoding */
875 int mv_bits;
876 int header_bits;
877 int i_tex_bits;
878 int p_tex_bits;
879 int i_count;
880 int p_count;
881 int skip_count;
882 int misc_bits;
883
884 /**
885 * number of bits used for the previously encoded frame.
886 * - encoding: set by lavc
887 * - decoding: unused
888 */
889 int frame_bits;
890
891 /**
892 * private data of the user, can be used to carry app specific stuff.
893 * - encoding: set by user
894 * - decoding: set by user
895 */
896 void *opaque;
897
898 char codec_name[32];
899 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
900 enum CodecID codec_id; /* see CODEC_ID_xxx */
901
902 /**
903 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
904 * this is used to workaround some encoder bugs
905 * - encoding: set by user, if not then the default based on codec_id will be used
906 * - decoding: set by user, will be converted to upper case by lavc during init
907 */
908 unsigned int codec_tag;
909
910 /**
911 * workaround bugs in encoders which sometimes cannot be detected automatically.
912 * - encoding: unused
913 * - decoding: set by user
914 */
915 int workaround_bugs;
916 #define FF_BUG_AUTODETECT 1 ///< autodetection
917 #define FF_BUG_OLD_MSMPEG4 2
918 #define FF_BUG_XVID_ILACE 4
919 #define FF_BUG_UMP4 8
920 #define FF_BUG_NO_PADDING 16
921 #define FF_BUG_AMV 32
922 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
923 #define FF_BUG_QPEL_CHROMA 64
924 #define FF_BUG_STD_QPEL 128
925 #define FF_BUG_QPEL_CHROMA2 256
926 #define FF_BUG_DIRECT_BLOCKSIZE 512
927 #define FF_BUG_EDGE 1024
928 #define FF_BUG_HPEL_CHROMA 2048
929 #define FF_BUG_DC_CLIP 4096
930 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
931
932 /**
933 * luma single coeff elimination threshold.
934 * - encoding: set by user
935 * - decoding: unused
936 */
937 int luma_elim_threshold;
938
939 /**
940 * chroma single coeff elimination threshold.
941 * - encoding: set by user
942 * - decoding: unused
943 */
944 int chroma_elim_threshold;
945
946 /**
947 * strictly follow the std (MPEG4, ...).
948 * - encoding: set by user
949 * - decoding: unused
950 */
951 int strict_std_compliance;
952
953 /**
954 * qscale offset between ip and b frames.
955 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
956 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
957 * - encoding: set by user.
958 * - decoding: unused
959 */
960 float b_quant_offset;
961
962 /**
963 * error resilience higher values will detect more errors but may missdetect
964 * some more or less valid parts as errors.
965 * - encoding: unused
966 * - decoding: set by user
967 */
968 int error_resilience;
969 #define FF_ER_CAREFULL 1
970 #define FF_ER_COMPLIANT 2
971 #define FF_ER_AGGRESSIVE 3
972 #define FF_ER_VERY_AGGRESSIVE 4
973
974 /**
975 * called at the beginning of each frame to get a buffer for it.
976 * if pic.reference is set then the frame will be read later by lavc
977 * avcodec_align_dimensions() should be used to find the required width and
978 * height, as they normally need to be rounded up to the next multiple of 16
979 * - encoding: unused
980 * - decoding: set by lavc, user can override
981 */
982 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
983
984 /**
985 * called to release buffers which where allocated with get_buffer.
986 * a released buffer can be reused in get_buffer()
987 * pic.data[*] must be set to NULL
988 * - encoding: unused
989 * - decoding: set by lavc, user can override
990 */
991 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
992
993 /**
994 * if 1 the stream has a 1 frame delay during decoding.
995 * - encoding: set by lavc
996 * - decoding: set by lavc
997 */
998 int has_b_frames;
999
1000 int block_align; ///< used by some WAV based audio codecs
1001
1002 int parse_only; /* - decoding only: if true, only parsing is done
1003 (function avcodec_parse_frame()). The frame
1004 data is returned. Only MPEG codecs support this now. */
1005
1006 /**
1007 * 0-> h263 quant 1-> mpeg quant.
1008 * - encoding: set by user.
1009 * - decoding: unused
1010 */
1011 int mpeg_quant;
1012
1013 /**
1014 * pass1 encoding statistics output buffer.
1015 * - encoding: set by lavc
1016 * - decoding: unused
1017 */
1018 char *stats_out;
1019
1020 /**
1021 * pass2 encoding statistics input buffer.
1022 * concatenated stuff from stats_out of pass1 should be placed here
1023 * - encoding: allocated/set/freed by user
1024 * - decoding: unused
1025 */
1026 char *stats_in;
1027
1028 /**
1029 * ratecontrol qmin qmax limiting method.
1030 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1031 * - encoding: set by user.
1032 * - decoding: unused
1033 */
1034 float rc_qsquish;
1035
1036 float rc_qmod_amp;
1037 int rc_qmod_freq;
1038
1039 /**
1040 * ratecontrol override, see RcOverride.
1041 * - encoding: allocated/set/freed by user.
1042 * - decoding: unused
1043 */
1044 RcOverride *rc_override;
1045 int rc_override_count;
1046
1047 /**
1048 * rate control equation.
1049 * - encoding: set by user
1050 * - decoding: unused
1051 */
1052 char *rc_eq;
1053
1054 /**
1055 * maximum bitrate.
1056 * - encoding: set by user.
1057 * - decoding: unused
1058 */
1059 int rc_max_rate;
1060
1061 /**
1062 * minimum bitrate.
1063 * - encoding: set by user.
1064 * - decoding: unused
1065 */
1066 int rc_min_rate;
1067
1068 /**
1069 * decoder bitstream buffer size.
1070 * - encoding: set by user.
1071 * - decoding: unused
1072 */
1073 int rc_buffer_size;
1074 float rc_buffer_aggressivity;
1075
1076 /**
1077 * qscale factor between p and i frames.
1078 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1079 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1080 * - encoding: set by user.
1081 * - decoding: unused
1082 */
1083 float i_quant_factor;
1084
1085 /**
1086 * qscale offset between p and i frames.
1087 * - encoding: set by user.
1088 * - decoding: unused
1089 */
1090 float i_quant_offset;
1091
1092 /**
1093 * initial complexity for pass1 ratecontrol.
1094 * - encoding: set by user.
1095 * - decoding: unused
1096 */
1097 float rc_initial_cplx;
1098
1099 /**
1100 * dct algorithm, see FF_DCT_* below.
1101 * - encoding: set by user
1102 * - decoding: unused
1103 */
1104 int dct_algo;
1105 #define FF_DCT_AUTO 0
1106 #define FF_DCT_FASTINT 1
1107 #define FF_DCT_INT 2
1108 #define FF_DCT_MMX 3
1109 #define FF_DCT_MLIB 4
1110 #define FF_DCT_ALTIVEC 5
1111 #define FF_DCT_FAAN 6
1112
1113 /**
1114 * luminance masking (0-> disabled).
1115 * - encoding: set by user
1116 * - decoding: unused
1117 */
1118 float lumi_masking;
1119
1120 /**
1121 * temporary complexity masking (0-> disabled).
1122 * - encoding: set by user
1123 * - decoding: unused
1124 */
1125 float temporal_cplx_masking;
1126
1127 /**
1128 * spatial complexity masking (0-> disabled).
1129 * - encoding: set by user
1130 * - decoding: unused
1131 */
1132 float spatial_cplx_masking;
1133
1134 /**
1135 * p block masking (0-> disabled).
1136 * - encoding: set by user
1137 * - decoding: unused
1138 */
1139 float p_masking;
1140
1141 /**
1142 * darkness masking (0-> disabled).
1143 * - encoding: set by user
1144 * - decoding: unused
1145 */
1146 float dark_masking;
1147
1148
1149 /* for binary compatibility */
1150 int unused;
1151
1152 /**
1153 * idct algorithm, see FF_IDCT_* below.
1154 * - encoding: set by user
1155 * - decoding: set by user
1156 */
1157 int idct_algo;
1158 #define FF_IDCT_AUTO 0
1159 #define FF_IDCT_INT 1
1160 #define FF_IDCT_SIMPLE 2
1161 #define FF_IDCT_SIMPLEMMX 3
1162 #define FF_IDCT_LIBMPEG2MMX 4
1163 #define FF_IDCT_PS2 5
1164 #define FF_IDCT_MLIB 6
1165 #define FF_IDCT_ARM 7
1166 #define FF_IDCT_ALTIVEC 8
1167 #define FF_IDCT_SH4 9
1168 #define FF_IDCT_SIMPLEARM 10
1169 #define FF_IDCT_H264 11
1170
1171 /**
1172 * slice count.
1173 * - encoding: set by lavc
1174 * - decoding: set by user (or 0)
1175 */
1176 int slice_count;
1177 /**
1178 * slice offsets in the frame in bytes.
1179 * - encoding: set/allocated by lavc
1180 * - decoding: set/allocated by user (or NULL)
1181 */
1182 int *slice_offset;
1183
1184 /**
1185 * error concealment flags.
1186 * - encoding: unused
1187 * - decoding: set by user
1188 */
1189 int error_concealment;
1190 #define FF_EC_GUESS_MVS 1
1191 #define FF_EC_DEBLOCK 2
1192
1193 /**
1194 * dsp_mask could be add used to disable unwanted CPU features
1195 * CPU features (i.e. MMX, SSE. ...)
1196 *
1197 * with FORCE flag you may instead enable given CPU features
1198 * (Dangerous: usable in case of misdetection, improper usage however will
1199 * result into program crash)
1200 */
1201 unsigned dsp_mask;
1202 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1203 /* lower 16 bits - CPU features */
1204 #ifdef HAVE_MMX
1205 #define FF_MM_MMX 0x0001 /* standard MMX */
1206 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1207 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1208 #define FF_MM_SSE 0x0008 /* SSE functions */
1209 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1210 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1211 #endif /* HAVE_MMX */
1212
1213 /**
1214 * bits per sample/pixel from the demuxer (needed for huffyuv).
1215 * - encoding: set by lavc
1216 * - decoding: set by user
1217 */
1218 int bits_per_sample;
1219
1220 /**
1221 * prediction method (needed for huffyuv).
1222 * - encoding: set by user
1223 * - decoding: unused
1224 */
1225 int prediction_method;
1226 #define FF_PRED_LEFT 0
1227 #define FF_PRED_PLANE 1
1228 #define FF_PRED_MEDIAN 2
1229
1230 /**
1231 * sample aspect ratio (0 if unknown).
1232 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1233 * - encoding: set by user.
1234 * - decoding: set by lavc.
1235 */
1236 AVRational sample_aspect_ratio;
1237
1238 /**
1239 * the picture in the bitstream.
1240 * - encoding: set by lavc
1241 * - decoding: set by lavc
1242 */
1243 AVFrame *coded_frame;
1244
1245 /**
1246 * debug.
1247 * - encoding: set by user.
1248 * - decoding: set by user.
1249 */
1250 int debug;
1251 #define FF_DEBUG_PICT_INFO 1
1252 #define FF_DEBUG_RC 2
1253 #define FF_DEBUG_BITSTREAM 4
1254 #define FF_DEBUG_MB_TYPE 8
1255 #define FF_DEBUG_QP 16
1256 #define FF_DEBUG_MV 32
1257 #define FF_DEBUG_DCT_COEFF 0x00000040
1258 #define FF_DEBUG_SKIP 0x00000080
1259 #define FF_DEBUG_STARTCODE 0x00000100
1260 #define FF_DEBUG_PTS 0x00000200
1261 #define FF_DEBUG_ER 0x00000400
1262 #define FF_DEBUG_MMCO 0x00000800
1263 #define FF_DEBUG_BUGS 0x00001000
1264 #define FF_DEBUG_VIS_QP 0x00002000
1265 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1266
1267 /**
1268 * debug.
1269 * - encoding: set by user.
1270 * - decoding: set by user.
1271 */
1272 int debug_mv;
1273 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1274 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1275 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1276
1277 /**
1278 * error.
1279 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1280 * - decoding: unused
1281 */
1282 uint64_t error[4];
1283
1284 /**
1285 * minimum MB quantizer.
1286 * - encoding: unused
1287 * - decoding: unused
1288 */
1289 int mb_qmin;
1290
1291 /**
1292 * maximum MB quantizer.
1293 * - encoding: unused
1294 * - decoding: unused
1295 */
1296 int mb_qmax;
1297
1298 /**
1299 * motion estimation compare function.
1300 * - encoding: set by user.
1301 * - decoding: unused
1302 */
1303 int me_cmp;
1304 /**
1305 * subpixel motion estimation compare function.
1306 * - encoding: set by user.
1307 * - decoding: unused
1308 */
1309 int me_sub_cmp;
1310 /**
1311 * macroblock compare function (not supported yet).
1312 * - encoding: set by user.
1313 * - decoding: unused
1314 */
1315 int mb_cmp;
1316 /**
1317 * interlaced dct compare function
1318 * - encoding: set by user.
1319 * - decoding: unused
1320 */
1321 int ildct_cmp;
1322 #define FF_CMP_SAD 0
1323 #define FF_CMP_SSE 1
1324 #define FF_CMP_SATD 2
1325 #define FF_CMP_DCT 3
1326 #define FF_CMP_PSNR 4
1327 #define FF_CMP_BIT 5
1328 #define FF_CMP_RD 6
1329 #define FF_CMP_ZERO 7
1330 #define FF_CMP_VSAD 8
1331 #define FF_CMP_VSSE 9
1332 #define FF_CMP_NSSE 10
1333 #define FF_CMP_W53 11
1334 #define FF_CMP_W97 12
1335 #define FF_CMP_DCTMAX 13
1336 #define FF_CMP_CHROMA 256
1337
1338 /**
1339 * ME diamond size & shape.
1340 * - encoding: set by user.
1341 * - decoding: unused
1342 */
1343 int dia_size;
1344
1345 /**
1346 * amount of previous MV predictors (2a+1 x 2a+1 square).
1347 * - encoding: set by user.
1348 * - decoding: unused
1349 */
1350 int last_predictor_count;
1351
1352 /**
1353 * pre pass for motion estimation.
1354 * - encoding: set by user.
1355 * - decoding: unused
1356 */
1357 int pre_me;
1358
1359 /**
1360 * motion estimation pre pass compare function.
1361 * - encoding: set by user.
1362 * - decoding: unused
1363 */
1364 int me_pre_cmp;
1365
1366 /**
1367 * ME pre pass diamond size & shape.
1368 * - encoding: set by user.
1369 * - decoding: unused
1370 */
1371 int pre_dia_size;
1372
1373 /**
1374 * subpel ME quality.
1375 * - encoding: set by user.
1376 * - decoding: unused
1377 */
1378 int me_subpel_quality;
1379
1380 /**
1381 * callback to negotiate the pixelFormat.
1382 * @param fmt is the list of formats which are supported by the codec,
1383 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1384 * the first is allways the native one
1385 * @return the choosen format
1386 * - encoding: unused
1387 * - decoding: set by user, if not set then the native format will always be choosen
1388 */
1389 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1390
1391 /**
1392 * DTG active format information (additionnal aspect ratio
1393 * information only used in DVB MPEG2 transport streams). 0 if
1394 * not set.
1395 *
1396 * - encoding: unused.
1397 * - decoding: set by decoder
1398 */
1399 int dtg_active_format;
1400 #define FF_DTG_AFD_SAME 8
1401 #define FF_DTG_AFD_4_3 9
1402 #define FF_DTG_AFD_16_9 10
1403 #define FF_DTG_AFD_14_9 11
1404 #define FF_DTG_AFD_4_3_SP_14_9 13
1405 #define FF_DTG_AFD_16_9_SP_14_9 14
1406 #define FF_DTG_AFD_SP_4_3 15
1407
1408 /**
1409 * Maximum motion estimation search range in subpel units.
1410 * if 0 then no limit
1411 *
1412 * - encoding: set by user.
1413 * - decoding: unused.
1414 */
1415 int me_range;
1416
1417 /**
1418 * frame_rate_base.
1419 * for variable fps this is 1
1420 * - encoding: set by user.
1421 * - decoding: set by lavc.
1422 * @todo move this after frame_rate
1423 */
1424
1425 int frame_rate_base;
1426 /**
1427 * intra quantizer bias.
1428 * - encoding: set by user.
1429 * - decoding: unused
1430 */
1431 int intra_quant_bias;
1432 #define FF_DEFAULT_QUANT_BIAS 999999
1433
1434 /**
1435 * inter quantizer bias.
1436 * - encoding: set by user.
1437 * - decoding: unused
1438 */
1439 int inter_quant_bias;
1440
1441 /**
1442 * color table ID.
1443 * - encoding: unused.
1444 * - decoding: which clrtable should be used for 8bit RGB images
1445 * table have to be stored somewhere FIXME
1446 */
1447 int color_table_id;
1448
1449 /**
1450 * internal_buffer count.
1451 * Dont touch, used by lavc default_get_buffer()
1452 */
1453 int internal_buffer_count;
1454
1455 /**
1456 * internal_buffers.
1457 * Dont touch, used by lavc default_get_buffer()
1458 */
1459 void *internal_buffer;
1460
1461 #define FF_LAMBDA_SHIFT 7
1462 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1463 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1464 #define FF_LAMBDA_MAX (256*128-1)
1465
1466 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1467 /**
1468 * global quality for codecs which cannot change it per frame.
1469 * this should be proportional to MPEG1/2/4 qscale.
1470 * - encoding: set by user.
1471 * - decoding: unused
1472 */
1473 int global_quality;
1474
1475 #define FF_CODER_TYPE_VLC 0
1476 #define FF_CODER_TYPE_AC 1
1477 /**
1478 * coder type
1479 * - encoding: set by user.
1480 * - decoding: unused
1481 */
1482 int coder_type;
1483
1484 /**
1485 * context model
1486 * - encoding: set by user.
1487 * - decoding: unused
1488 */
1489 int context_model;
1490
1491 /**
1492 * slice flags
1493 * - encoding: unused
1494 * - decoding: set by user.
1495 */
1496 int slice_flags;
1497 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1498 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1499 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1500
1501 /**
1502 * XVideo Motion Acceleration
1503 * - encoding: forbidden
1504 * - decoding: set by decoder
1505 */
1506 int xvmc_acceleration;
1507
1508 /**
1509 * macroblock decision mode
1510 * - encoding: set by user.
1511 * - decoding: unused
1512 */
1513 int mb_decision;
1514 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1515 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1516 #define FF_MB_DECISION_RD 2 ///< rate distoration
1517
1518 /**
1519 * custom intra quantization matrix
1520 * - encoding: set by user, can be NULL
1521 * - decoding: set by lavc
1522 */
1523 uint16_t *intra_matrix;
1524
1525 /**
1526 * custom inter quantization matrix
1527 * - encoding: set by user, can be NULL
1528 * - decoding: set by lavc
1529 */
1530 uint16_t *inter_matrix;
1531
1532 /**
1533 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1534 * this is used to workaround some encoder bugs
1535 * - encoding: unused
1536 * - decoding: set by user, will be converted to upper case by lavc during init
1537 */
1538 unsigned int stream_codec_tag;
1539
1540 /**
1541 * scene change detection threshold.
1542 * 0 is default, larger means fewer detected scene changes
1543 * - encoding: set by user.
1544 * - decoding: unused
1545 */
1546 int scenechange_threshold;
1547
1548 /**
1549 * minimum lagrange multipler
1550 * - encoding: set by user.
1551 * - decoding: unused
1552 */
1553 int lmin;
1554
1555 /**
1556 * maximum lagrange multipler
1557 * - encoding: set by user.
1558 * - decoding: unused
1559 */
1560 int lmax;
1561
1562 /**
1563 * Palette control structure
1564 * - encoding: ??? (no palette-enabled encoder yet)
1565 * - decoding: set by user.
1566 */
1567 struct AVPaletteControl *palctrl;
1568
1569 /**
1570 * noise reduction strength
1571 * - encoding: set by user.
1572 * - decoding: unused
1573 */
1574 int noise_reduction;
1575
1576 /**
1577 * called at the beginning of a frame to get cr buffer for it.
1578 * buffer type (size, hints) must be the same. lavc won't check it.
1579 * lavc will pass previous buffer in pic, function should return
1580 * same buffer or new buffer with old frame "painted" into it.
1581 * if pic.data[0] == NULL must behave like get_buffer().
1582 * - encoding: unused
1583 * - decoding: set by lavc, user can override
1584 */
1585 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1586
1587 /**
1588 * number of bits which should be loaded into the rc buffer before decoding starts
1589 * - encoding: set by user.
1590 * - decoding: unused
1591 */
1592 int rc_initial_buffer_occupancy;
1593
1594 /**
1595 *
1596 * - encoding: set by user.
1597 * - decoding: unused
1598 */
1599 int inter_threshold;
1600
1601 /**
1602 * CODEC_FLAG2_*.
1603 * - encoding: set by user.
1604 * - decoding: set by user.
1605 */
1606 int flags2;
1607
1608 /**
1609 * simulates errors in the bitstream to test error concealment.
1610 * - encoding: set by user.
1611 * - decoding: unused.
1612 */
1613 int error_rate;
1614
1615 /**
1616 * MP3 antialias algorithm, see FF_AA_* below.
1617 * - encoding: unused
1618 * - decoding: set by user
1619 */
1620 int antialias_algo;
1621 #define FF_AA_AUTO 0
1622 #define FF_AA_FASTINT 1 //not implemented yet
1623 #define FF_AA_INT 2
1624 #define FF_AA_FLOAT 3
1625 /**
1626 * Quantizer noise shaping.
1627 * - encoding: set by user
1628 * - decoding: unused
1629 */
1630 int quantizer_noise_shaping;
1631
1632 /**
1633 * Thread count.
1634 * is used to decide how many independant tasks should be passed to execute()
1635 * - encoding: set by user
1636 * - decoding: set by user
1637 */
1638 int thread_count;
1639
1640 /**
1641 * the codec may call this to execute several independant things. it will return only after
1642 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1643 * default implementation will execute the parts serially
1644 * @param count the number of things to execute
1645 * - encoding: set by lavc, user can override
1646 * - decoding: set by lavc, user can override
1647 */
1648 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1649
1650 /**
1651 * Thread opaque.
1652 * can be used by execute() to store some per AVCodecContext stuff.
1653 * - encoding: set by execute()
1654 * - decoding: set by execute()
1655 */
1656 void *thread_opaque;
1657
1658 /**
1659 * Motion estimation threshold. under which no motion estimation is
1660 * performed, but instead the user specified motion vectors are used
1661 *
1662 * - encoding: set by user
1663 * - decoding: unused
1664 */
1665 int me_threshold;
1666
1667 /**
1668 * Macroblock threshold. under which the user specified macroblock types will be used
1669 * - encoding: set by user
1670 * - decoding: unused
1671 */
1672 int mb_threshold;
1673
1674 /**
1675 * precision of the intra dc coefficient - 8.
1676 * - encoding: set by user
1677 * - decoding: unused
1678 */
1679 int intra_dc_precision;
1680
1681 /**
1682 * noise vs. sse weight for the nsse comparsion function.
1683 * - encoding: set by user
1684 * - decoding: unused
1685 */
1686 int nsse_weight;
1687
1688 /**
1689 * number of macroblock rows at the top which are skiped.
1690 * - encoding: unused
1691 * - decoding: set by user
1692 */
1693 int skip_top;
1694
1695 /**
1696 * number of macroblock rows at the bottom which are skiped.
1697 * - encoding: unused
1698 * - decoding: set by user
1699 */
1700 int skip_bottom;
1701
1702 /**
1703 * profile
1704 * - encoding: set by user
1705 * - decoding: set by lavc
1706 */
1707 int profile;
1708 #define FF_PROFILE_UNKNOWN -99
1709
1710 /**
1711 * level
1712 * - encoding: set by user
1713 * - decoding: set by lavc
1714 */
1715 int level;
1716 #define FF_LEVEL_UNKNOWN -99
1717
1718 /**
1719 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1720 * - encoding: unused
1721 * - decoding: set by user
1722 */
1723 int lowres;
1724
1725 /**
1726 * bitsream width / height. may be different from width/height if lowres
1727 * or other things are used
1728 * - encoding: unused
1729 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1730 */
1731 int coded_width, coded_height;
1732
1733 /**
1734 * frame skip threshold
1735 * - encoding: set by user
1736 * - decoding: unused
1737 */
1738 int frame_skip_threshold;
1739
1740 /**
1741 * frame skip factor
1742 * - encoding: set by user
1743 * - decoding: unused
1744 */
1745 int frame_skip_factor;
1746
1747 /**
1748 * frame skip exponent
1749 * - encoding: set by user
1750 * - decoding: unused
1751 */
1752 int frame_skip_exp;
1753
1754 /**
1755 * frame skip comparission function
1756 * - encoding: set by user.
1757 * - decoding: unused
1758 */
1759 int frame_skip_cmp;
1760
1761 /**
1762 * border processing masking. raises the quantizer for mbs on the borders
1763 * of the picture.
1764 * - encoding: set by user
1765 * - decoding: unused
1766 */
1767 float border_masking;
1768
1769 /**
1770 * minimum MB lagrange multipler.
1771 * - encoding: set by user.
1772 * - decoding: unused
1773 */
1774 int mb_lmin;
1775
1776 /**
1777 * maximum MB lagrange multipler.
1778 * - encoding: set by user.
1779 * - decoding: unused
1780 */
1781 int mb_lmax;
1782 } AVCodecContext;
1783
1784
1785 /**
1786 * AVOption.
1787 */
1788 typedef struct AVOption {
1789 /** options' name */
1790 const char *name; /* if name is NULL, it indicates a link to next */
1791 /** short English text help or const struct AVOption* subpointer */
1792 const char *help; // const struct AVOption* sub;
1793 /** offset to context structure where the parsed value should be stored */
1794 int offset;
1795 /** options' type */
1796 int type;
1797 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1798 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1799 #define FF_OPT_TYPE_INT 3 ///< integer
1800 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1801 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1802 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1803 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1804 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1805 /** min value (min == max -> no limits) */
1806 double min;
1807 /** maximum value for double/int */
1808 double max;
1809 /** default boo [0,1]l/double/int value */
1810 double defval;
1811 /**
1812 * default string value (with optional semicolon delimited extra option-list
1813 * i.e. option1;option2;option3
1814 * defval might select other then first argument as default
1815 */
1816 const char *defstr;
1817 #define FF_OPT_MAX_DEPTH 10
1818 } AVOption;
1819
1820 /**
1821 * Parse option(s) and sets fields in passed structure
1822 * @param strct structure where the parsed results will be written
1823 * @param list list with AVOptions
1824 * @param opts string with options for parsing
1825 */
1826 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1827
1828
1829 /**
1830 * AVCodec.
1831 */
1832 typedef struct AVCodec {
1833 const char *name;
1834 enum CodecType type;
1835 enum CodecID id;
1836 int priv_data_size;
1837 int (*init)(AVCodecContext *);
1838 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1839 int (*close)(AVCodecContext *);
1840 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1841 uint8_t *buf, int buf_size);
1842 int capabilities;
1843 const AVOption *options;
1844 struct AVCodec *next;
1845 void (*flush)(AVCodecContext *);
1846 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1847 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1848 } AVCodec;
1849
1850 /**
1851 * four components are given, that's all.
1852 * the last component is alpha
1853 */
1854 typedef struct AVPicture {
1855 uint8_t *data[4];
1856 int linesize[4]; ///< number of bytes per line
1857 } AVPicture;
1858
1859 /**
1860 * AVPaletteControl
1861 * This structure defines a method for communicating palette changes
1862 * between and demuxer and a decoder.
1863 */
1864 #define AVPALETTE_SIZE 1024
1865 #define AVPALETTE_COUNT 256
1866 typedef struct AVPaletteControl {
1867
1868 /* demuxer sets this to 1 to indicate the palette has changed;
1869 * decoder resets to 0 */
1870 int palette_changed;
1871
1872 /* 4-byte ARGB palette entries, stored in native byte order; note that
1873 * the individual palette components should be on a 8-bit scale; if
1874 * the palette data comes from a IBM VGA native format, the component
1875 * data is probably 6 bits in size and needs to be scaled */
1876 unsigned int palette[AVPALETTE_COUNT];
1877
1878 } AVPaletteControl;
1879
1880 extern AVCodec ac3_encoder;
1881 extern AVCodec mp2_encoder;
1882 extern AVCodec mp3lame_encoder;
1883 extern AVCodec oggvorbis_encoder;
1884 extern AVCodec oggtheora_encoder;
1885 extern AVCodec faac_encoder;
1886 extern AVCodec xvid_encoder;
1887 extern AVCodec mpeg1video_encoder;
1888 extern AVCodec mpeg2video_encoder;
1889 extern AVCodec h261_encoder;
1890 extern AVCodec h263_encoder;
1891 extern AVCodec h263p_encoder;
1892 extern AVCodec flv_encoder;
1893 extern AVCodec rv10_encoder;
1894 extern AVCodec rv20_encoder;
1895 extern AVCodec dvvideo_encoder;
1896 extern AVCodec mjpeg_encoder;
1897 extern AVCodec ljpeg_encoder;
1898 extern AVCodec png_encoder;
1899 extern AVCodec ppm_encoder;
1900 extern AVCodec pgm_encoder;
1901 extern AVCodec pgmyuv_encoder;
1902 extern AVCodec pbm_encoder;
1903 extern AVCodec pam_encoder;
1904 extern AVCodec mpeg4_encoder;
1905 extern AVCodec msmpeg4v1_encoder;
1906 extern AVCodec msmpeg4v2_encoder;
1907 extern AVCodec msmpeg4v3_encoder;
1908 extern AVCodec wmv1_encoder;
1909 extern AVCodec wmv2_encoder;
1910 extern AVCodec huffyuv_encoder;
1911 extern AVCodec ffvhuff_encoder;
1912 extern AVCodec h264_encoder;
1913 extern AVCodec asv1_encoder;
1914 extern AVCodec asv2_encoder;
1915 extern AVCodec vcr1_encoder;
1916 extern AVCodec ffv1_encoder;
1917 extern AVCodec snow_encoder;
1918 extern AVCodec mdec_encoder;
1919 extern AVCodec zlib_encoder;
1920 extern AVCodec sonic_encoder;
1921 extern AVCodec sonic_ls_encoder;
1922 extern AVCodec svq1_encoder;
1923
1924 extern AVCodec h263_decoder;
1925 extern AVCodec h261_decoder;
1926 extern AVCodec mpeg4_decoder;
1927 extern AVCodec msmpeg4v1_decoder;
1928 extern AVCodec msmpeg4v2_decoder;
1929 extern AVCodec msmpeg4v3_decoder;
1930 extern AVCodec wmv1_decoder;
1931 extern AVCodec wmv2_decoder;
1932 extern AVCodec vc9_decoder;
1933 extern AVCodec wmv3_decoder;
1934 extern AVCodec mpeg1video_decoder;
1935 extern AVCodec mpeg2video_decoder;
1936 extern AVCodec mpegvideo_decoder;
1937 extern AVCodec mpeg_xvmc_decoder;
1938 extern AVCodec h263i_decoder;
1939 extern AVCodec flv_decoder;
1940 extern AVCodec rv10_decoder;
1941 extern AVCodec rv20_decoder;
1942 extern AVCodec rv30_decoder;
1943 extern AVCodec rv40_decoder;
1944 extern AVCodec svq1_decoder;
1945 extern AVCodec svq3_decoder;
1946 extern AVCodec dvvideo_decoder;
1947 extern AVCodec wmav1_decoder;
1948 extern AVCodec wmav2_decoder;
1949 extern AVCodec mjpeg_decoder;
1950 extern AVCodec mjpegb_decoder;
1951 extern AVCodec sp5x_decoder;
1952 extern AVCodec png_decoder;
1953 extern AVCodec mp2_decoder;
1954 extern AVCodec mp3_decoder;
1955 extern AVCodec mp3adu_decoder;
1956 extern AVCodec mp3on4_decoder;
1957 extern AVCodec mace3_decoder;
1958 extern AVCodec mace6_decoder;
1959 extern AVCodec huffyuv_decoder;
1960 extern AVCodec ffvhuff_decoder;
1961 extern AVCodec oggvorbis_decoder;
1962 extern AVCodec oggtheora_decoder;
1963 extern AVCodec cyuv_decoder;
1964 extern AVCodec h264_decoder;
1965 extern AVCodec indeo3_decoder;
1966 extern AVCodec vp3_decoder;
1967 extern AVCodec theora_decoder;
1968 extern AVCodec amr_nb_decoder;
1969 extern AVCodec amr_nb_encoder;
1970 extern AVCodec amr_wb_encoder;
1971 extern AVCodec amr_wb_decoder;
1972 extern AVCodec aac_decoder;
1973 extern AVCodec mpeg4aac_decoder;
1974 extern AVCodec asv1_decoder;
1975 extern AVCodec asv2_decoder;
1976 extern AVCodec vcr1_decoder;
1977 extern AVCodec cljr_decoder;
1978 extern AVCodec ffv1_decoder;
1979 extern AVCodec snow_decoder;
1980 extern AVCodec fourxm_decoder;
1981 extern AVCodec mdec_decoder;
1982 extern AVCodec roq_decoder;
1983 extern AVCodec interplay_video_decoder;
1984 extern AVCodec xan_wc3_decoder;
1985 extern AVCodec rpza_decoder;
1986 extern AVCodec cinepak_decoder;
1987 extern AVCodec msrle_decoder;
1988 extern AVCodec msvideo1_decoder;
1989 extern AVCodec vqa_decoder;
1990 extern AVCodec idcin_decoder;
1991 extern AVCodec eightbps_decoder;
1992 extern AVCodec smc_decoder;
1993 extern AVCodec flic_decoder;
1994 extern AVCodec vmdvideo_decoder;
1995 extern AVCodec vmdaudio_decoder;
1996 extern AVCodec truemotion1_decoder;
1997 extern AVCodec mszh_decoder;
1998 extern AVCodec zlib_decoder;
1999 extern AVCodec ra_144_decoder;
2000 extern AVCodec ra_288_decoder;
2001 extern AVCodec roq_dpcm_decoder;
2002 extern AVCodec interplay_dpcm_decoder;
2003 extern AVCodec xan_dpcm_decoder;
2004 extern AVCodec sol_dpcm_decoder;
2005 extern AVCodec sonic_decoder;
2006 extern AVCodec qtrle_decoder;
2007 extern AVCodec flac_decoder;
2008 extern AVCodec tscc_decoder;
2009 extern AVCodec ulti_decoder;
2010 extern AVCodec qdraw_decoder;
2011 extern AVCodec xl_decoder;
2012 extern AVCodec qpeg_decoder;
2013 extern AVCodec shorten_decoder;
2014 extern AVCodec loco_decoder;
2015 extern AVCodec alac_decoder;
2016
2017 /* pcm codecs */
2018 #define PCM_CODEC(id, name) \
2019 extern AVCodec name ## _decoder; \
2020 extern AVCodec name ## _encoder
2021
2022 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2023 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2024 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2025 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2026 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2027 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2028 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2029 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2030
2031 /* adpcm codecs */
2032
2033 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2034 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2035 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2036 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2037 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2038 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2039 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2040 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2041 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2042 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2043 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2044 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2045 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2046 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2047
2048 #undef PCM_CODEC
2049
2050 /* dummy raw video codec */
2051 extern AVCodec rawvideo_encoder;
2052 extern AVCodec rawvideo_decoder;
2053
2054 /* the following codecs use external GPL libs */
2055 extern AVCodec ac3_decoder;
2056 extern AVCodec dts_decoder;
2057
2058 /* resample.c */
2059
2060 struct ReSampleContext;
2061 struct AVResampleContext;
2062
2063 typedef struct ReSampleContext ReSampleContext;
2064
2065 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2066 int output_rate, int input_rate);
2067 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2068 void audio_resample_close(ReSampleContext *s);
2069
2070 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2071 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2072 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2073 void av_resample_close(struct AVResampleContext *c);
2074
2075 /* YUV420 format is assumed ! */
2076
2077 struct ImgReSampleContext;
2078
2079 typedef struct ImgReSampleContext ImgReSampleContext;
2080
2081 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2082 int input_width, int input_height);
2083
2084 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2085 int iwidth, int iheight,
2086 int topBand, int bottomBand,
2087 int leftBand, int rightBand,
2088 int padtop, int padbottom,
2089 int padleft, int padright);
2090
2091
2092 void img_resample(ImgReSampleContext *s,
2093 AVPicture *output, const AVPicture *input);
2094
2095 void img_resample_close(ImgReSampleContext *s);
2096
2097 /**
2098 * Allocate memory for a picture. Call avpicture_free to free it.
2099 *
2100 * @param picture the picture to be filled in.
2101 * @param pix_fmt the format of the picture.
2102 * @param width the width of the picture.
2103 * @param height the height of the picture.
2104 * @return 0 if successful, -1 if not.
2105 */
2106 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2107
2108 /* Free a picture previously allocated by avpicture_alloc. */
2109 void avpicture_free(AVPicture *picture);
2110
2111 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2112 int pix_fmt, int width, int height);
2113 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2114 unsigned char *dest, int dest_size);
2115 int avpicture_get_size(int pix_fmt, int width, int height);
2116 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2117 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2118 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2119 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2120 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2121
2122 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2123 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2124 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2125 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2126 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2127 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2128
2129 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2130 int has_alpha);
2131 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2132 int has_alpha, int *loss_ptr);
2133
2134 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2135 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2136 int img_get_alpha_info(const AVPicture *src,
2137 int pix_fmt, int width, int height);
2138
2139 /* convert among pixel formats */
2140 int img_convert(AVPicture *dst, int dst_pix_fmt,
2141 const AVPicture *src, int pix_fmt,
2142 int width, int height);
2143
2144 /* deinterlace a picture */
2145 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2146 int pix_fmt, int width, int height);
2147
2148 /* external high level API */
2149
2150 extern AVCodec *first_avcodec;
2151
2152 /* returns LIBAVCODEC_VERSION_INT constant */
2153 unsigned avcodec_version(void);
2154 /* returns LIBAVCODEC_BUILD constant */
2155 unsigned avcodec_build(void);
2156 void avcodec_init(void);
2157
2158 void register_avcodec(AVCodec *format);
2159 AVCodec *avcodec_find_encoder(enum CodecID id);
2160 AVCodec *avcodec_find_encoder_by_name(const char *name);
2161 AVCodec *avcodec_find_decoder(enum CodecID id);
2162 AVCodec *avcodec_find_decoder_by_name(const char *name);
2163 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2164
2165 void avcodec_get_context_defaults(AVCodecContext *s);
2166 AVCodecContext *avcodec_alloc_context(void);
2167 void avcodec_get_frame_defaults(AVFrame *pic);
2168 AVFrame *avcodec_alloc_frame(void);
2169
2170 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2171 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2172 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2173 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2174 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2175 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2176
2177 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2178 void avcodec_thread_free(AVCodecContext *s);
2179 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2180 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2181 //FIXME func typedef
2182
2183 /**
2184 * opens / inits the AVCodecContext.
2185 * not thread save!
2186 */
2187 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2188
2189 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2190 int *frame_size_ptr,
2191 uint8_t *buf, int buf_size);
2192 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2193 int *got_picture_ptr,
2194 uint8_t *buf, int buf_size);
2195 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2196 int *data_size_ptr,
2197 uint8_t *buf, int buf_size);
2198 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2199 const short *samples);
2200 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2201 const AVFrame *pict);
2202
2203 int avcodec_close(AVCodecContext *avctx);
2204
2205 void avcodec_register_all(void);
2206
2207 void avcodec_flush_buffers(AVCodecContext *avctx);
2208
2209 void avcodec_default_free_buffers(AVCodecContext *s);
2210
2211 /* misc usefull functions */
2212
2213 /**
2214 * returns a single letter to describe the picture type
2215 */
2216 char av_get_pict_type_char(int pict_type);
2217
2218 /**
2219 * reduce a fraction.
2220 * this is usefull for framerate calculations
2221 * @param max the maximum allowed for dst_nom & dst_den
2222 * @return 1 if exact, 0 otherwise
2223 */
2224 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2225
2226 /**
2227 * rescale a 64bit integer with rounding to nearest.
2228 * a simple a*b/c isnt possible as it can overflow
2229 */
2230 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2231
2232 /**
2233 * rescale a 64bit integer with specified rounding.
2234 * a simple a*b/c isnt possible as it can overflow
2235 */
2236 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
2237
2238 /* frame parsing */
2239 typedef struct AVCodecParserContext {
2240 void *priv_data;
2241 struct AVCodecParser *parser;
2242 int64_t frame_offset; /* offset of the current frame */
2243 int64_t cur_offset; /* current offset
2244 (incremented by each av_parser_parse()) */
2245 int64_t last_frame_offset; /* offset of the last frame */
2246 /* video info */
2247 int pict_type; /* XXX: put it back in AVCodecContext */
2248 int repeat_pict; /* XXX: put it back in AVCodecContext */
2249 int64_t pts; /* pts of the current frame */
2250 int64_t dts; /* dts of the current frame */
2251
2252 /* private data */
2253 int64_t last_pts;
2254 int64_t last_dts;
2255 int fetch_timestamp;
2256
2257 #define AV_PARSER_PTS_NB 4
2258 int cur_frame_start_index;
2259 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2260 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2261 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2262 } AVCodecParserContext;
2263
2264 typedef struct AVCodecParser {
2265 int codec_ids[5]; /* several codec IDs are permitted */
2266 int priv_data_size;
2267 int (*parser_init)(AVCodecParserContext *s);
2268 int (*parser_parse)(AVCodecParserContext *s,
2269 AVCodecContext *avctx,
2270 uint8_t **poutbuf, int *poutbuf_size,
2271 const uint8_t *buf, int buf_size);
2272 void (*parser_close)(AVCodecParserContext *s);
2273 struct AVCodecParser *next;
2274 } AVCodecParser;
2275
2276 extern AVCodecParser *av_first_parser;
2277
2278 void av_register_codec_parser(AVCodecParser *parser);
2279 AVCodecParserContext *av_parser_init(int codec_id);
2280 int av_parser_parse(AVCodecParserContext *s,
2281 AVCodecContext *avctx,
2282 uint8_t **poutbuf, int *poutbuf_size,
2283 const uint8_t *buf, int buf_size,
2284 int64_t pts, int64_t dts);
2285 void av_parser_close(AVCodecParserContext *s);
2286
2287 extern AVCodecParser mpegvideo_parser;
2288 extern AVCodecParser mpeg4video_parser;
2289 extern AVCodecParser h261_parser;
2290 extern AVCodecParser h263_parser;
2291 extern AVCodecParser h264_parser;
2292 extern AVCodecParser mjpeg_parser;
2293 extern AVCodecParser pnm_parser;
2294 extern AVCodecParser mpegaudio_parser;
2295 extern AVCodecParser ac3_parser;
2296
2297 /* memory */
2298 void *av_malloc(unsigned int size);
2299 void *av_mallocz(unsigned int size);
2300 void *av_realloc(void *ptr, unsigned int size);
2301 void av_free(void *ptr);
2302 char *av_strdup(const char *s);
2303 void av_freep(void *ptr);
2304 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2305 /* for static data only */
2306 /* call av_free_static to release all staticaly allocated tables */
2307 void av_free_static(void);
2308 void *av_mallocz_static(unsigned int size);
2309 void *av_realloc_static(void *ptr, unsigned int size);
2310
2311 /* add by bero : in adx.c */
2312 int is_adx(const unsigned char *buf,size_t bufsize);
2313
2314 void img_copy(AVPicture *dst, const AVPicture *src,
2315 int pix_fmt, int width, int height);
2316
2317 /* av_log API */
2318
2319 #include <stdarg.h>
2320
2321 #define AV_LOG_QUIET -1
2322 #define AV_LOG_ERROR 0
2323 #define AV_LOG_INFO 1
2324 #define AV_LOG_DEBUG 2
2325
2326 #ifdef __GNUC__
2327 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2328 #else
2329 extern void av_log(void*, int level, const char *fmt, ...);
2330 #endif
2331
2332 extern void av_vlog(void*, int level, const char *fmt, va_list);
2333 extern int av_log_get_level(void);
2334 extern void av_log_set_level(int);
2335 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2336
2337 /* endian macros */
2338 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2339 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2340 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2341 (((uint8_t*)(x))[1] << 16) | \
2342 (((uint8_t*)(x))[2] << 8) | \
2343 ((uint8_t*)(x))[3])
2344 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2345 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2346 (((uint8_t*)(x))[2] << 16) | \
2347 (((uint8_t*)(x))[1] << 8) | \
2348 ((uint8_t*)(x))[0])
2349 #endif
2350
2351 #ifdef __cplusplus
2352 }
2353 #endif
2354
2355 #endif /* AVCODEC_H */