45de845c73d97881decb0fc42aabbb427427b59c
[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 4754
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 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
32
33 enum CodecID {
34 CODEC_ID_NONE,
35 CODEC_ID_MPEG1VIDEO,
36 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
37 CODEC_ID_MPEG2VIDEO_XVMC,
38 CODEC_ID_H261,
39 CODEC_ID_H263,
40 CODEC_ID_RV10,
41 CODEC_ID_RV20,
42 CODEC_ID_MJPEG,
43 CODEC_ID_MJPEGB,
44 CODEC_ID_LJPEG,
45 CODEC_ID_SP5X,
46 CODEC_ID_MPEG4,
47 CODEC_ID_RAWVIDEO,
48 CODEC_ID_MSMPEG4V1,
49 CODEC_ID_MSMPEG4V2,
50 CODEC_ID_MSMPEG4V3,
51 CODEC_ID_WMV1,
52 CODEC_ID_WMV2,
53 CODEC_ID_H263P,
54 CODEC_ID_H263I,
55 CODEC_ID_FLV1,
56 CODEC_ID_SVQ1,
57 CODEC_ID_SVQ3,
58 CODEC_ID_DVVIDEO,
59 CODEC_ID_HUFFYUV,
60 CODEC_ID_CYUV,
61 CODEC_ID_H264,
62 CODEC_ID_INDEO3,
63 CODEC_ID_VP3,
64 CODEC_ID_THEORA,
65 CODEC_ID_ASV1,
66 CODEC_ID_ASV2,
67 CODEC_ID_FFV1,
68 CODEC_ID_4XM,
69 CODEC_ID_VCR1,
70 CODEC_ID_CLJR,
71 CODEC_ID_MDEC,
72 CODEC_ID_ROQ,
73 CODEC_ID_INTERPLAY_VIDEO,
74 CODEC_ID_XAN_WC3,
75 CODEC_ID_XAN_WC4,
76 CODEC_ID_RPZA,
77 CODEC_ID_CINEPAK,
78 CODEC_ID_WS_VQA,
79 CODEC_ID_MSRLE,
80 CODEC_ID_MSVIDEO1,
81 CODEC_ID_IDCIN,
82 CODEC_ID_8BPS,
83 CODEC_ID_SMC,
84 CODEC_ID_FLIC,
85 CODEC_ID_TRUEMOTION1,
86 CODEC_ID_VMDVIDEO,
87 CODEC_ID_MSZH,
88 CODEC_ID_ZLIB,
89 CODEC_ID_QTRLE,
90 CODEC_ID_SNOW,
91 CODEC_ID_TSCC,
92 CODEC_ID_ULTI,
93 CODEC_ID_QDRAW,
94 CODEC_ID_VIXL,
95 CODEC_ID_QPEG,
96 CODEC_ID_XVID,
97 CODEC_ID_PNG,
98 CODEC_ID_PPM,
99 CODEC_ID_PBM,
100 CODEC_ID_PGM,
101 CODEC_ID_PGMYUV,
102 CODEC_ID_PAM,
103 CODEC_ID_FFVHUFF,
104 CODEC_ID_RV30,
105 CODEC_ID_RV40,
106 CODEC_ID_VC9,
107 CODEC_ID_WMV3,
108 CODEC_ID_LOCO,
109 CODEC_ID_WNV1,
110 CODEC_ID_AASC,
111 CODEC_ID_INDEO2,
112
113 /* various pcm "codecs" */
114 CODEC_ID_PCM_S16LE= 0x10000,
115 CODEC_ID_PCM_S16BE,
116 CODEC_ID_PCM_U16LE,
117 CODEC_ID_PCM_U16BE,
118 CODEC_ID_PCM_S8,
119 CODEC_ID_PCM_U8,
120 CODEC_ID_PCM_MULAW,
121 CODEC_ID_PCM_ALAW,
122
123 /* various adpcm codecs */
124 CODEC_ID_ADPCM_IMA_QT= 0x11000,
125 CODEC_ID_ADPCM_IMA_WAV,
126 CODEC_ID_ADPCM_IMA_DK3,
127 CODEC_ID_ADPCM_IMA_DK4,
128 CODEC_ID_ADPCM_IMA_WS,
129 CODEC_ID_ADPCM_IMA_SMJPEG,
130 CODEC_ID_ADPCM_MS,
131 CODEC_ID_ADPCM_4XM,
132 CODEC_ID_ADPCM_XA,
133 CODEC_ID_ADPCM_ADX,
134 CODEC_ID_ADPCM_EA,
135 CODEC_ID_ADPCM_G726,
136 CODEC_ID_ADPCM_CT,
137 CODEC_ID_ADPCM_SWF,
138
139 /* AMR */
140 CODEC_ID_AMR_NB= 0x12000,
141 CODEC_ID_AMR_WB,
142
143 /* RealAudio codecs*/
144 CODEC_ID_RA_144= 0x13000,
145 CODEC_ID_RA_288,
146
147 /* various DPCM codecs */
148 CODEC_ID_ROQ_DPCM= 0x14000,
149 CODEC_ID_INTERPLAY_DPCM,
150 CODEC_ID_XAN_DPCM,
151 CODEC_ID_SOL_DPCM,
152
153 CODEC_ID_MP2= 0x15000,
154 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
155 CODEC_ID_AAC,
156 CODEC_ID_MPEG4AAC,
157 CODEC_ID_AC3,
158 CODEC_ID_DTS,
159 CODEC_ID_VORBIS,
160 CODEC_ID_DVAUDIO,
161 CODEC_ID_WMAV1,
162 CODEC_ID_WMAV2,
163 CODEC_ID_MACE3,
164 CODEC_ID_MACE6,
165 CODEC_ID_VMDAUDIO,
166 CODEC_ID_SONIC,
167 CODEC_ID_SONIC_LS,
168 CODEC_ID_FLAC,
169 CODEC_ID_MP3ADU,
170 CODEC_ID_MP3ON4,
171 CODEC_ID_SHORTEN,
172 CODEC_ID_ALAC,
173 CODEC_ID_WESTWOOD_SND1,
174
175 CODEC_ID_OGGTHEORA= 0x16000,
176
177 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
178 stream (only used by libavformat) */
179 };
180
181 /* CODEC_ID_MP3LAME is absolete */
182 #define CODEC_ID_MP3LAME CODEC_ID_MP3
183
184 enum CodecType {
185 CODEC_TYPE_UNKNOWN = -1,
186 CODEC_TYPE_VIDEO,
187 CODEC_TYPE_AUDIO,
188 CODEC_TYPE_DATA,
189 };
190
191 /**
192 * Pixel format. Notes:
193 *
194 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
195 * color is put together as:
196 * (A << 24) | (R << 16) | (G << 8) | B
197 * This is stored as BGRA on little endian CPU architectures and ARGB on
198 * big endian CPUs.
199 *
200 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
201 * image data is stored in AVFrame.data[0]. The palette is transported in
202 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
203 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
204 * also endian-specific). Note also that the individual RGB palette
205 * components stored in AVFrame.data[1] should be in the range 0..255.
206 * This is important as many custom PAL8 video codecs that were designed
207 * to run on the IBM VGA graphics adapter use 6-bit palette components.
208 */
209 enum PixelFormat {
210 PIX_FMT_NONE= -1,
211 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
212 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
213 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
214 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
215 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
216 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
217 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
218 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
219 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
220 PIX_FMT_RGB565, ///< always stored in cpu endianness
221 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
222 PIX_FMT_GRAY8,
223 PIX_FMT_MONOWHITE, ///< 0 is white
224 PIX_FMT_MONOBLACK, ///< 0 is black
225 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
226 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
227 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
228 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
229 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
230 PIX_FMT_XVMC_MPEG2_IDCT,
231 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
232 PIX_FMT_UYVY411, ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
233 PIX_FMT_NB,
234 };
235
236 /* currently unused, may be used if 24/32 bits samples ever supported */
237 enum SampleFormat {
238 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
239 SAMPLE_FMT_S32, ///< signed 32 bits
240 SAMPLE_FMT_FLT, ///< float
241 SAMPLE_FMT_DBL, ///< double
242 };
243
244 /* in bytes */
245 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
246
247 /**
248 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
249 * this is mainly needed because some optimized bitstream readers read
250 * 32 or 64 bit at once and could read over the end<br>
251 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
252 * MPEG bitstreams could cause overread and segfault
253 */
254 #define FF_INPUT_BUFFER_PADDING_SIZE 8
255
256 /**
257 * minimum encoding buffer size.
258 * used to avoid some checks during header writing
259 */
260 #define FF_MIN_BUFFER_SIZE 16384
261
262 /* motion estimation type, EPZS by default */
263 enum Motion_Est_ID {
264 ME_ZERO = 1,
265 ME_FULL,
266 ME_LOG,
267 ME_PHODS,
268 ME_EPZS,
269 ME_X1
270 };
271
272 enum AVRounding {
273 AV_ROUND_ZERO = 0, ///< round toward zero
274 AV_ROUND_INF = 1, ///< round away from zero
275 AV_ROUND_DOWN = 2, ///< round toward -infinity
276 AV_ROUND_UP = 3, ///< round toward +infinity
277 AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
278 };
279
280 typedef struct RcOverride{
281 int start_frame;
282 int end_frame;
283 int qscale; // if this is 0 then quality_factor will be used instead
284 float quality_factor;
285 } RcOverride;
286
287 /* only for ME compatiblity with old apps */
288 extern int motion_estimation_method;
289
290 #define FF_MAX_B_FRAMES 8
291
292 /* encoding support
293 these flags can be passed in AVCodecContext.flags before initing
294 Note: note not everything is supported yet
295 */
296
297 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
298 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
299 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
300 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
301 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
302 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
303 /* parent program gurantees that the input for b-frame containing streams is not written to
304 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
305 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
306 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
307 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
308 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
309 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
310 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
311 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
312 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
313 of only at frame boundaries */
314 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
315 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
316 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
317 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
318 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
319 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
320 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
321 /* Fx : Flag for h263+ extra options */
322 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
323 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
324 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
325 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
326 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
327 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
328 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
329 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
330 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
331 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
332 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
333 #define CODEC_FLAG_CLOSED_GOP 0x80000000
334 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
335 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
336 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
337
338 /* Unsupported options :
339 * Syntax Arithmetic coding (SAC)
340 * Reference Picture Selection
341 * Independant Segment Decoding */
342 /* /Fx */
343 /* codec capabilities */
344
345 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
346 /**
347 * Codec uses get_buffer() for allocating buffers.
348 * direct rendering method 1
349 */
350 #define CODEC_CAP_DR1 0x0002
351 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
352 used */
353 #define CODEC_CAP_PARSE_ONLY 0x0004
354 #define CODEC_CAP_TRUNCATED 0x0008
355 /* codec can export data for HW decoding (XvMC) */
356 #define CODEC_CAP_HWACCEL 0x0010
357 /**
358 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
359 * if this is not set, the codec is guranteed to never be feeded with NULL data
360 */
361 #define CODEC_CAP_DELAY 0x0020
362
363 //the following defines might change, so dont expect compatibility if u use them
364 #define MB_TYPE_INTRA4x4 0x0001
365 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
366 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
367 #define MB_TYPE_16x16 0x0008
368 #define MB_TYPE_16x8 0x0010
369 #define MB_TYPE_8x16 0x0020
370 #define MB_TYPE_8x8 0x0040
371 #define MB_TYPE_INTERLACED 0x0080
372 #define MB_TYPE_DIRECT2 0x0100 //FIXME
373 #define MB_TYPE_ACPRED 0x0200
374 #define MB_TYPE_GMC 0x0400
375 #define MB_TYPE_SKIP 0x0800
376 #define MB_TYPE_P0L0 0x1000
377 #define MB_TYPE_P1L0 0x2000
378 #define MB_TYPE_P0L1 0x4000
379 #define MB_TYPE_P1L1 0x8000
380 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
381 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
382 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
383 #define MB_TYPE_QUANT 0x00010000
384 #define MB_TYPE_CBP 0x00020000
385 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
386
387 /**
388 * Pan Scan area.
389 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
390 */
391 typedef struct AVPanScan{
392 /**
393 * id.
394 * - encoding: set by user.
395 * - decoding: set by lavc
396 */
397 int id;
398
399 /**
400 * width and height in 1/16 pel
401 * - encoding: set by user.
402 * - decoding: set by lavc
403 */
404 int width;
405 int height;
406
407 /**
408 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
409 * - encoding: set by user.
410 * - decoding: set by lavc
411 */
412 int16_t position[3][2];
413 }AVPanScan;
414
415 #define FF_COMMON_FRAME \
416 /**\
417 * pointer to the picture planes.\
418 * this might be different from the first allocated byte\
419 * - encoding: \
420 * - decoding: \
421 */\
422 uint8_t *data[4];\
423 int linesize[4];\
424 /**\
425 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
426 * this isnt used by lavc unless the default get/release_buffer() is used\
427 * - encoding: \
428 * - decoding: \
429 */\
430 uint8_t *base[4];\
431 /**\
432 * 1 -> keyframe, 0-> not\
433 * - encoding: set by lavc\
434 * - decoding: set by lavc\
435 */\
436 int key_frame;\
437 \
438 /**\
439 * picture type of the frame, see ?_TYPE below.\
440 * - encoding: set by lavc for coded_picture (and set by user for input)\
441 * - decoding: set by lavc\
442 */\
443 int pict_type;\
444 \
445 /**\
446 * presentation timestamp in time_base units (time when frame should be shown to user)\
447 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
448 * - encoding: MUST be set by user\
449 * - decoding: set by lavc\
450 */\
451 int64_t pts;\
452 \
453 /**\
454 * picture number in bitstream order.\
455 * - encoding: set by\
456 * - decoding: set by lavc\
457 */\
458 int coded_picture_number;\
459 /**\
460 * picture number in display order.\
461 * - encoding: set by\
462 * - decoding: set by lavc\
463 */\
464 int display_picture_number;\
465 \
466 /**\
467 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
468 * - encoding: set by lavc for coded_picture (and set by user for input)\
469 * - decoding: set by lavc\
470 */\
471 int quality; \
472 \
473 /**\
474 * buffer age (1->was last buffer and dint change, 2->..., ...).\
475 * set to INT_MAX if the buffer has not been used yet \
476 * - encoding: unused\
477 * - decoding: MUST be set by get_buffer()\
478 */\
479 int age;\
480 \
481 /**\
482 * is this picture used as reference\
483 * - encoding: unused\
484 * - decoding: set by lavc (before get_buffer() call))\
485 */\
486 int reference;\
487 \
488 /**\
489 * QP table\
490 * - encoding: unused\
491 * - decoding: set by lavc\
492 */\
493 int8_t *qscale_table;\
494 /**\
495 * QP store stride\
496 * - encoding: unused\
497 * - decoding: set by lavc\
498 */\
499 int qstride;\
500 \
501 /**\
502 * mbskip_table[mb]>=1 if MB didnt change\
503 * stride= mb_width = (width+15)>>4\
504 * - encoding: unused\
505 * - decoding: set by lavc\
506 */\
507 uint8_t *mbskip_table;\
508 \
509 /**\
510 * Motion vector table.\
511 * @code\
512 * example:\
513 * int mv_sample_log2= 4 - motion_subsample_log2;\
514 * int mb_width= (width+15)>>4;\
515 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
516 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
517 * @endcode\
518 * - encoding: set by user\
519 * - decoding: set by lavc\
520 */\
521 int16_t (*motion_val[2])[2];\
522 \
523 /**\
524 * Macroblock type table\
525 * mb_type_base + mb_width + 2\
526 * - encoding: set by user\
527 * - decoding: set by lavc\
528 */\
529 uint32_t *mb_type;\
530 \
531 /**\
532 * log2 of the size of the block which a single vector in motion_val represents: \
533 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
534 * - encoding: unused\
535 * - decoding: set by lavc\
536 */\
537 uint8_t motion_subsample_log2;\
538 \
539 /**\
540 * for some private data of the user\
541 * - encoding: unused\
542 * - decoding: set by user\
543 */\
544 void *opaque;\
545 \
546 /**\
547 * error\
548 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
549 * - decoding: unused\
550 */\
551 uint64_t error[4];\
552 \
553 /**\
554 * type of the buffer (to keep track of who has to dealloc data[*])\
555 * - encoding: set by the one who allocs it\
556 * - decoding: set by the one who allocs it\
557 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
558 */\
559 int type;\
560 \
561 /**\
562 * when decoding, this signal how much the picture must be delayed.\
563 * extra_delay = repeat_pict / (2*fps)\
564 * - encoding: unused\
565 * - decoding: set by lavc\
566 */\
567 int repeat_pict;\
568 \
569 /**\
570 * \
571 */\
572 int qscale_type;\
573 \
574 /**\
575 * The content of the picture is interlaced.\
576 * - encoding: set by user\
577 * - decoding: set by lavc (default 0)\
578 */\
579 int interlaced_frame;\
580 \
581 /**\
582 * if the content is interlaced, is top field displayed first.\
583 * - encoding: set by user\
584 * - decoding: set by lavc\
585 */\
586 int top_field_first;\
587 \
588 /**\
589 * Pan scan.\
590 * - encoding: set by user\
591 * - decoding: set by lavc\
592 */\
593 AVPanScan *pan_scan;\
594 \
595 /**\
596 * tell user application that palette has changed from previous frame.\
597 * - encoding: ??? (no palette-enabled encoder yet)\
598 * - decoding: set by lavc (default 0)\
599 */\
600 int palette_has_changed;\
601 \
602 /**\
603 * Codec suggestion on buffer type if != 0\
604 * - encoding: unused\
605 * - decoding: set by lavc (before get_buffer() call))\
606 */\
607 int buffer_hints;\
608 \
609 /**\
610 * DCT coeffitients\
611 * - encoding: unused\
612 * - decoding: set by lavc\
613 */\
614 short *dct_coeff;\
615 \
616 /**\
617 * Motion referece frame index\
618 * - encoding: set by user\
619 * - decoding: set by lavc\
620 */\
621 int8_t *ref_index[2];
622
623 #define FF_QSCALE_TYPE_MPEG1 0
624 #define FF_QSCALE_TYPE_MPEG2 1
625
626 #define FF_BUFFER_TYPE_INTERNAL 1
627 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
628 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
629 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
630
631
632 #define FF_I_TYPE 1 // Intra
633 #define FF_P_TYPE 2 // Predicted
634 #define FF_B_TYPE 3 // Bi-dir predicted
635 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
636 #define FF_SI_TYPE 5
637 #define FF_SP_TYPE 6
638
639 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
640 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
641 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
642 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
643
644 /**
645 * Audio Video Frame.
646 */
647 typedef struct AVFrame {
648 FF_COMMON_FRAME
649 } AVFrame;
650
651 #define DEFAULT_FRAME_RATE_BASE 1001000
652
653 /**
654 * Used by av_log
655 */
656 typedef struct AVCLASS AVClass;
657 struct AVCLASS {
658 const char* class_name;
659 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
660 or AVFormatContext, which begin with an AVClass.
661 Needed because av_log is in libavcodec and has no visibility
662 of AVIn/OutputFormat */
663 };
664
665 /**
666 * main external api structure.
667 */
668 typedef struct AVCodecContext {
669 /**
670 * Info on struct for av_log
671 * - set by avcodec_alloc_context
672 */
673 AVClass *av_class;
674 /**
675 * the average bitrate.
676 * - encoding: set by user. unused for constant quantizer encoding
677 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
678 */
679 int bit_rate;
680
681 /**
682 * number of bits the bitstream is allowed to diverge from the reference.
683 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
684 * - encoding: set by user. unused for constant quantizer encoding
685 * - decoding: unused
686 */
687 int bit_rate_tolerance;
688
689 /**
690 * CODEC_FLAG_*.
691 * - encoding: set by user.
692 * - decoding: set by user.
693 */
694 int flags;
695
696 /**
697 * some codecs needs additionnal format info. It is stored here
698 * - encoding: set by user.
699 * - decoding: set by lavc. (FIXME is this ok?)
700 */
701 int sub_id;
702
703 /**
704 * motion estimation algorithm used for video coding.
705 * - encoding: MUST be set by user.
706 * - decoding: unused
707 */
708 int me_method;
709
710 /**
711 * some codecs need / can use extra-data like huffman tables.
712 * mjpeg: huffman tables
713 * rv10: additional flags
714 * mpeg4: global headers (they can be in the bitstream or here)
715 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
716 * then extradata_size to avoid prolems if its read with the bitstream reader
717 * - encoding: set/allocated/freed by lavc.
718 * - decoding: set/allocated/freed by user.
719 */
720 void *extradata;
721 int extradata_size;
722
723 /* video only */
724 /**
725 * time base in which the timestamps are specified.
726 * - encoding: MUST be set by user
727 * - decoding: set by lavc.
728 */
729 AVRational time_base;
730
731 /**
732 * picture width / height.
733 * - encoding: MUST be set by user.
734 * - decoding: set by lavc.
735 * Note, for compatibility its possible to set this instead of
736 * coded_width/height before decoding
737 */
738 int width, height;
739
740 #define FF_ASPECT_EXTENDED 15
741
742 /**
743 * the number of pictures in a group of pitures, or 0 for intra_only.
744 * - encoding: set by user.
745 * - decoding: unused
746 */
747 int gop_size;
748
749 /**
750 * pixel format, see PIX_FMT_xxx.
751 * - encoding: set by user.
752 * - decoding: set by lavc.
753 */
754 enum PixelFormat pix_fmt;
755
756 /**
757 * Frame rate emulation. If not zero lower layer (i.e. format handler)
758 * has to read frames at native frame rate.
759 * - encoding: set by user.
760 * - decoding: unused.
761 */
762 int rate_emu;
763
764 /**
765 * if non NULL, 'draw_horiz_band' is called by the libavcodec
766 * decoder to draw an horizontal band. It improve cache usage. Not
767 * all codecs can do that. You must check the codec capabilities
768 * before
769 * - encoding: unused
770 * - decoding: set by user.
771 * @param height the height of the slice
772 * @param y the y position of the slice
773 * @param type 1->top field, 2->bottom field, 3->frame
774 * @param offset offset into the AVFrame.data from which the slice should be read
775 */
776 void (*draw_horiz_band)(struct AVCodecContext *s,
777 const AVFrame *src, int offset[4],
778 int y, int type, int height);
779
780 /* audio only */
781 int sample_rate; ///< samples per sec
782 int channels;
783
784 /**
785 * audio sample format.
786 * - encoding: set by user.
787 * - decoding: set by lavc.
788 */
789 enum SampleFormat sample_fmt; ///< sample format, currenly unused
790
791 /* the following data should not be initialized */
792 int frame_size; ///< in samples, initialized when calling 'init'
793 int frame_number; ///< audio or video frame number
794 int real_pict_num; ///< returns the real picture number of previous encoded frame
795
796 /**
797 * number of frames the decoded output will be delayed relative to
798 * the encoded input.
799 * - encoding: set by lavc.
800 * - decoding: unused
801 */
802 int delay;
803
804 /* - encoding parameters */
805 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
806 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
807
808 /**
809 * minimum quantizer.
810 * - encoding: set by user.
811 * - decoding: unused
812 */
813 int qmin;
814
815 /**
816 * maximum quantizer.
817 * - encoding: set by user.
818 * - decoding: unused
819 */
820 int qmax;
821
822 /**
823 * maximum quantizer difference etween frames.
824 * - encoding: set by user.
825 * - decoding: unused
826 */
827 int max_qdiff;
828
829 /**
830 * maximum number of b frames between non b frames.
831 * note: the output will be delayed by max_b_frames+1 relative to the input
832 * - encoding: set by user.
833 * - decoding: unused
834 */
835 int max_b_frames;
836
837 /**
838 * qscale factor between ip and b frames.
839 * - encoding: set by user.
840 * - decoding: unused
841 */
842 float b_quant_factor;
843
844 /** obsolete FIXME remove */
845 int rc_strategy;
846 int b_frame_strategy;
847
848 /**
849 * hurry up amount.
850 * - encoding: unused
851 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
852 */
853 int hurry_up;
854
855 struct AVCodec *codec;
856
857 void *priv_data;
858
859 /* unused, FIXME remove*/
860 int rtp_mode;
861
862 int rtp_payload_size; /* The size of the RTP payload, the coder will */
863 /* do it's best to deliver a chunk with size */
864 /* below rtp_payload_size, the chunk will start */
865 /* with a start code on some codecs like H.263 */
866 /* This doesn't take account of any particular */
867 /* headers inside the transmited RTP payload */
868
869
870 /* The RTP callcack: This function is called */
871 /* every time the encoder as a packet to send */
872 /* Depends on the encoder if the data starts */
873 /* with a Start Code (it should) H.263 does. */
874 /* mb_nb contains the number of macroblocks */
875 /* encoded in the RTP payload */
876 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
877
878 /* statistics, used for 2-pass encoding */
879 int mv_bits;
880 int header_bits;
881 int i_tex_bits;
882 int p_tex_bits;
883 int i_count;
884 int p_count;
885 int skip_count;
886 int misc_bits;
887
888 /**
889 * number of bits used for the previously encoded frame.
890 * - encoding: set by lavc
891 * - decoding: unused
892 */
893 int frame_bits;
894
895 /**
896 * private data of the user, can be used to carry app specific stuff.
897 * - encoding: set by user
898 * - decoding: set by user
899 */
900 void *opaque;
901
902 char codec_name[32];
903 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
904 enum CodecID codec_id; /* see CODEC_ID_xxx */
905
906 /**
907 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
908 * this is used to workaround some encoder bugs
909 * - encoding: set by user, if not then the default based on codec_id will be used
910 * - decoding: set by user, will be converted to upper case by lavc during init
911 */
912 unsigned int codec_tag;
913
914 /**
915 * workaround bugs in encoders which sometimes cannot be detected automatically.
916 * - encoding: set by user
917 * - decoding: set by user
918 */
919 int workaround_bugs;
920 #define FF_BUG_AUTODETECT 1 ///< autodetection
921 #define FF_BUG_OLD_MSMPEG4 2
922 #define FF_BUG_XVID_ILACE 4
923 #define FF_BUG_UMP4 8
924 #define FF_BUG_NO_PADDING 16
925 #define FF_BUG_AMV 32
926 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
927 #define FF_BUG_QPEL_CHROMA 64
928 #define FF_BUG_STD_QPEL 128
929 #define FF_BUG_QPEL_CHROMA2 256
930 #define FF_BUG_DIRECT_BLOCKSIZE 512
931 #define FF_BUG_EDGE 1024
932 #define FF_BUG_HPEL_CHROMA 2048
933 #define FF_BUG_DC_CLIP 4096
934 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
935 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
936
937 /**
938 * luma single coeff elimination threshold.
939 * - encoding: set by user
940 * - decoding: unused
941 */
942 int luma_elim_threshold;
943
944 /**
945 * chroma single coeff elimination threshold.
946 * - encoding: set by user
947 * - decoding: unused
948 */
949 int chroma_elim_threshold;
950
951 /**
952 * strictly follow the std (MPEG4, ...).
953 * - encoding: set by user
954 * - decoding: unused
955 */
956 int strict_std_compliance;
957 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
958 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
959 #define FF_COMPLIANCE_NORMAL 0
960 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
961 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
962
963 /**
964 * qscale offset between ip and b frames.
965 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
966 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
967 * - encoding: set by user.
968 * - decoding: unused
969 */
970 float b_quant_offset;
971
972 /**
973 * error resilience higher values will detect more errors but may missdetect
974 * some more or less valid parts as errors.
975 * - encoding: unused
976 * - decoding: set by user
977 */
978 int error_resilience;
979 #define FF_ER_CAREFULL 1
980 #define FF_ER_COMPLIANT 2
981 #define FF_ER_AGGRESSIVE 3
982 #define FF_ER_VERY_AGGRESSIVE 4
983
984 /**
985 * called at the beginning of each frame to get a buffer for it.
986 * if pic.reference is set then the frame will be read later by lavc
987 * avcodec_align_dimensions() should be used to find the required width and
988 * height, as they normally need to be rounded up to the next multiple of 16
989 * - encoding: unused
990 * - decoding: set by lavc, user can override
991 */
992 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
993
994 /**
995 * called to release buffers which where allocated with get_buffer.
996 * a released buffer can be reused in get_buffer()
997 * pic.data[*] must be set to NULL
998 * - encoding: unused
999 * - decoding: set by lavc, user can override
1000 */
1001 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1002
1003 /**
1004 * if 1 the stream has a 1 frame delay during decoding.
1005 * - encoding: set by lavc
1006 * - decoding: set by lavc
1007 */
1008 int has_b_frames;
1009
1010 int block_align; ///< used by some WAV based audio codecs
1011
1012 int parse_only; /* - decoding only: if true, only parsing is done
1013 (function avcodec_parse_frame()). The frame
1014 data is returned. Only MPEG codecs support this now. */
1015
1016 /**
1017 * 0-> h263 quant 1-> mpeg quant.
1018 * - encoding: set by user.
1019 * - decoding: unused
1020 */
1021 int mpeg_quant;
1022
1023 /**
1024 * pass1 encoding statistics output buffer.
1025 * - encoding: set by lavc
1026 * - decoding: unused
1027 */
1028 char *stats_out;
1029
1030 /**
1031 * pass2 encoding statistics input buffer.
1032 * concatenated stuff from stats_out of pass1 should be placed here
1033 * - encoding: allocated/set/freed by user
1034 * - decoding: unused
1035 */
1036 char *stats_in;
1037
1038 /**
1039 * ratecontrol qmin qmax limiting method.
1040 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1041 * - encoding: set by user.
1042 * - decoding: unused
1043 */
1044 float rc_qsquish;
1045
1046 float rc_qmod_amp;
1047 int rc_qmod_freq;
1048
1049 /**
1050 * ratecontrol override, see RcOverride.
1051 * - encoding: allocated/set/freed by user.
1052 * - decoding: unused
1053 */
1054 RcOverride *rc_override;
1055 int rc_override_count;
1056
1057 /**
1058 * rate control equation.
1059 * - encoding: set by user
1060 * - decoding: unused
1061 */
1062 char *rc_eq;
1063
1064 /**
1065 * maximum bitrate.
1066 * - encoding: set by user.
1067 * - decoding: unused
1068 */
1069 int rc_max_rate;
1070
1071 /**
1072 * minimum bitrate.
1073 * - encoding: set by user.
1074 * - decoding: unused
1075 */
1076 int rc_min_rate;
1077
1078 /**
1079 * decoder bitstream buffer size.
1080 * - encoding: set by user.
1081 * - decoding: unused
1082 */
1083 int rc_buffer_size;
1084 float rc_buffer_aggressivity;
1085
1086 /**
1087 * qscale factor between p and i frames.
1088 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1089 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1090 * - encoding: set by user.
1091 * - decoding: unused
1092 */
1093 float i_quant_factor;
1094
1095 /**
1096 * qscale offset between p and i frames.
1097 * - encoding: set by user.
1098 * - decoding: unused
1099 */
1100 float i_quant_offset;
1101
1102 /**
1103 * initial complexity for pass1 ratecontrol.
1104 * - encoding: set by user.
1105 * - decoding: unused
1106 */
1107 float rc_initial_cplx;
1108
1109 /**
1110 * dct algorithm, see FF_DCT_* below.
1111 * - encoding: set by user
1112 * - decoding: unused
1113 */
1114 int dct_algo;
1115 #define FF_DCT_AUTO 0
1116 #define FF_DCT_FASTINT 1
1117 #define FF_DCT_INT 2
1118 #define FF_DCT_MMX 3
1119 #define FF_DCT_MLIB 4
1120 #define FF_DCT_ALTIVEC 5
1121 #define FF_DCT_FAAN 6
1122
1123 /**
1124 * luminance masking (0-> disabled).
1125 * - encoding: set by user
1126 * - decoding: unused
1127 */
1128 float lumi_masking;
1129
1130 /**
1131 * temporary complexity masking (0-> disabled).
1132 * - encoding: set by user
1133 * - decoding: unused
1134 */
1135 float temporal_cplx_masking;
1136
1137 /**
1138 * spatial complexity masking (0-> disabled).
1139 * - encoding: set by user
1140 * - decoding: unused
1141 */
1142 float spatial_cplx_masking;
1143
1144 /**
1145 * p block masking (0-> disabled).
1146 * - encoding: set by user
1147 * - decoding: unused
1148 */
1149 float p_masking;
1150
1151 /**
1152 * darkness masking (0-> disabled).
1153 * - encoding: set by user
1154 * - decoding: unused
1155 */
1156 float dark_masking;
1157
1158
1159 /* for binary compatibility */
1160 int unused;
1161
1162 /**
1163 * idct algorithm, see FF_IDCT_* below.
1164 * - encoding: set by user
1165 * - decoding: set by user
1166 */
1167 int idct_algo;
1168 #define FF_IDCT_AUTO 0
1169 #define FF_IDCT_INT 1
1170 #define FF_IDCT_SIMPLE 2
1171 #define FF_IDCT_SIMPLEMMX 3
1172 #define FF_IDCT_LIBMPEG2MMX 4
1173 #define FF_IDCT_PS2 5
1174 #define FF_IDCT_MLIB 6
1175 #define FF_IDCT_ARM 7
1176 #define FF_IDCT_ALTIVEC 8
1177 #define FF_IDCT_SH4 9
1178 #define FF_IDCT_SIMPLEARM 10
1179 #define FF_IDCT_H264 11
1180 #define FF_IDCT_VP3 12
1181
1182 /**
1183 * slice count.
1184 * - encoding: set by lavc
1185 * - decoding: set by user (or 0)
1186 */
1187 int slice_count;
1188 /**
1189 * slice offsets in the frame in bytes.
1190 * - encoding: set/allocated by lavc
1191 * - decoding: set/allocated by user (or NULL)
1192 */
1193 int *slice_offset;
1194
1195 /**
1196 * error concealment flags.
1197 * - encoding: unused
1198 * - decoding: set by user
1199 */
1200 int error_concealment;
1201 #define FF_EC_GUESS_MVS 1
1202 #define FF_EC_DEBLOCK 2
1203
1204 /**
1205 * dsp_mask could be add used to disable unwanted CPU features
1206 * CPU features (i.e. MMX, SSE. ...)
1207 *
1208 * with FORCE flag you may instead enable given CPU features
1209 * (Dangerous: usable in case of misdetection, improper usage however will
1210 * result into program crash)
1211 */
1212 unsigned dsp_mask;
1213 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1214 /* lower 16 bits - CPU features */
1215 #ifdef HAVE_MMX
1216 #define FF_MM_MMX 0x0001 /* standard MMX */
1217 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1218 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1219 #define FF_MM_SSE 0x0008 /* SSE functions */
1220 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1221 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1222 #endif /* HAVE_MMX */
1223
1224 /**
1225 * bits per sample/pixel from the demuxer (needed for huffyuv).
1226 * - encoding: set by lavc
1227 * - decoding: set by user
1228 */
1229 int bits_per_sample;
1230
1231 /**
1232 * prediction method (needed for huffyuv).
1233 * - encoding: set by user
1234 * - decoding: unused
1235 */
1236 int prediction_method;
1237 #define FF_PRED_LEFT 0
1238 #define FF_PRED_PLANE 1
1239 #define FF_PRED_MEDIAN 2
1240
1241 /**
1242 * sample aspect ratio (0 if unknown).
1243 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1244 * - encoding: set by user.
1245 * - decoding: set by lavc.
1246 */
1247 AVRational sample_aspect_ratio;
1248
1249 /**
1250 * the picture in the bitstream.
1251 * - encoding: set by lavc
1252 * - decoding: set by lavc
1253 */
1254 AVFrame *coded_frame;
1255
1256 /**
1257 * debug.
1258 * - encoding: set by user.
1259 * - decoding: set by user.
1260 */
1261 int debug;
1262 #define FF_DEBUG_PICT_INFO 1
1263 #define FF_DEBUG_RC 2
1264 #define FF_DEBUG_BITSTREAM 4
1265 #define FF_DEBUG_MB_TYPE 8
1266 #define FF_DEBUG_QP 16
1267 #define FF_DEBUG_MV 32
1268 #define FF_DEBUG_DCT_COEFF 0x00000040
1269 #define FF_DEBUG_SKIP 0x00000080
1270 #define FF_DEBUG_STARTCODE 0x00000100
1271 #define FF_DEBUG_PTS 0x00000200
1272 #define FF_DEBUG_ER 0x00000400
1273 #define FF_DEBUG_MMCO 0x00000800
1274 #define FF_DEBUG_BUGS 0x00001000
1275 #define FF_DEBUG_VIS_QP 0x00002000
1276 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1277
1278 /**
1279 * debug.
1280 * - encoding: set by user.
1281 * - decoding: set by user.
1282 */
1283 int debug_mv;
1284 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1285 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1286 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1287
1288 /**
1289 * error.
1290 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1291 * - decoding: unused
1292 */
1293 uint64_t error[4];
1294
1295 /**
1296 * minimum MB quantizer.
1297 * - encoding: unused
1298 * - decoding: unused
1299 */
1300 int mb_qmin;
1301
1302 /**
1303 * maximum MB quantizer.
1304 * - encoding: unused
1305 * - decoding: unused
1306 */
1307 int mb_qmax;
1308
1309 /**
1310 * motion estimation compare function.
1311 * - encoding: set by user.
1312 * - decoding: unused
1313 */
1314 int me_cmp;
1315 /**
1316 * subpixel motion estimation compare function.
1317 * - encoding: set by user.
1318 * - decoding: unused
1319 */
1320 int me_sub_cmp;
1321 /**
1322 * macroblock compare function (not supported yet).
1323 * - encoding: set by user.
1324 * - decoding: unused
1325 */
1326 int mb_cmp;
1327 /**
1328 * interlaced dct compare function
1329 * - encoding: set by user.
1330 * - decoding: unused
1331 */
1332 int ildct_cmp;
1333 #define FF_CMP_SAD 0
1334 #define FF_CMP_SSE 1
1335 #define FF_CMP_SATD 2
1336 #define FF_CMP_DCT 3
1337 #define FF_CMP_PSNR 4
1338 #define FF_CMP_BIT 5
1339 #define FF_CMP_RD 6
1340 #define FF_CMP_ZERO 7
1341 #define FF_CMP_VSAD 8
1342 #define FF_CMP_VSSE 9
1343 #define FF_CMP_NSSE 10
1344 #define FF_CMP_W53 11
1345 #define FF_CMP_W97 12
1346 #define FF_CMP_DCTMAX 13
1347 #define FF_CMP_CHROMA 256
1348
1349 /**
1350 * ME diamond size & shape.
1351 * - encoding: set by user.
1352 * - decoding: unused
1353 */
1354 int dia_size;
1355
1356 /**
1357 * amount of previous MV predictors (2a+1 x 2a+1 square).
1358 * - encoding: set by user.
1359 * - decoding: unused
1360 */
1361 int last_predictor_count;
1362
1363 /**
1364 * pre pass for motion estimation.
1365 * - encoding: set by user.
1366 * - decoding: unused
1367 */
1368 int pre_me;
1369
1370 /**
1371 * motion estimation pre pass compare function.
1372 * - encoding: set by user.
1373 * - decoding: unused
1374 */
1375 int me_pre_cmp;
1376
1377 /**
1378 * ME pre pass diamond size & shape.
1379 * - encoding: set by user.
1380 * - decoding: unused
1381 */
1382 int pre_dia_size;
1383
1384 /**
1385 * subpel ME quality.
1386 * - encoding: set by user.
1387 * - decoding: unused
1388 */
1389 int me_subpel_quality;
1390
1391 /**
1392 * callback to negotiate the pixelFormat.
1393 * @param fmt is the list of formats which are supported by the codec,
1394 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1395 * the first is allways the native one
1396 * @return the choosen format
1397 * - encoding: unused
1398 * - decoding: set by user, if not set then the native format will always be choosen
1399 */
1400 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1401
1402 /**
1403 * DTG active format information (additionnal aspect ratio
1404 * information only used in DVB MPEG2 transport streams). 0 if
1405 * not set.
1406 *
1407 * - encoding: unused.
1408 * - decoding: set by decoder
1409 */
1410 int dtg_active_format;
1411 #define FF_DTG_AFD_SAME 8
1412 #define FF_DTG_AFD_4_3 9
1413 #define FF_DTG_AFD_16_9 10
1414 #define FF_DTG_AFD_14_9 11
1415 #define FF_DTG_AFD_4_3_SP_14_9 13
1416 #define FF_DTG_AFD_16_9_SP_14_9 14
1417 #define FF_DTG_AFD_SP_4_3 15
1418
1419 /**
1420 * Maximum motion estimation search range in subpel units.
1421 * if 0 then no limit
1422 *
1423 * - encoding: set by user.
1424 * - decoding: unused.
1425 */
1426 int me_range;
1427
1428 /**
1429 * intra quantizer bias.
1430 * - encoding: set by user.
1431 * - decoding: unused
1432 */
1433 int intra_quant_bias;
1434 #define FF_DEFAULT_QUANT_BIAS 999999
1435
1436 /**
1437 * inter quantizer bias.
1438 * - encoding: set by user.
1439 * - decoding: unused
1440 */
1441 int inter_quant_bias;
1442
1443 /**
1444 * color table ID.
1445 * - encoding: unused.
1446 * - decoding: which clrtable should be used for 8bit RGB images
1447 * table have to be stored somewhere FIXME
1448 */
1449 int color_table_id;
1450
1451 /**
1452 * internal_buffer count.
1453 * Dont touch, used by lavc default_get_buffer()
1454 */
1455 int internal_buffer_count;
1456
1457 /**
1458 * internal_buffers.
1459 * Dont touch, used by lavc default_get_buffer()
1460 */
1461 void *internal_buffer;
1462
1463 #define FF_LAMBDA_SHIFT 7
1464 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1465 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1466 #define FF_LAMBDA_MAX (256*128-1)
1467
1468 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1469 /**
1470 * global quality for codecs which cannot change it per frame.
1471 * this should be proportional to MPEG1/2/4 qscale.
1472 * - encoding: set by user.
1473 * - decoding: unused
1474 */
1475 int global_quality;
1476
1477 #define FF_CODER_TYPE_VLC 0
1478 #define FF_CODER_TYPE_AC 1
1479 /**
1480 * coder type
1481 * - encoding: set by user.
1482 * - decoding: unused
1483 */
1484 int coder_type;
1485
1486 /**
1487 * context model
1488 * - encoding: set by user.
1489 * - decoding: unused
1490 */
1491 int context_model;
1492
1493 /**
1494 * slice flags
1495 * - encoding: unused
1496 * - decoding: set by user.
1497 */
1498 int slice_flags;
1499 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1500 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1501 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1502
1503 /**
1504 * XVideo Motion Acceleration
1505 * - encoding: forbidden
1506 * - decoding: set by decoder
1507 */
1508 int xvmc_acceleration;
1509
1510 /**
1511 * macroblock decision mode
1512 * - encoding: set by user.
1513 * - decoding: unused
1514 */
1515 int mb_decision;
1516 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1517 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1518 #define FF_MB_DECISION_RD 2 ///< rate distoration
1519
1520 /**
1521 * custom intra quantization matrix
1522 * - encoding: set by user, can be NULL
1523 * - decoding: set by lavc
1524 */
1525 uint16_t *intra_matrix;
1526
1527 /**
1528 * custom inter quantization matrix
1529 * - encoding: set by user, can be NULL
1530 * - decoding: set by lavc
1531 */
1532 uint16_t *inter_matrix;
1533
1534 /**
1535 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1536 * this is used to workaround some encoder bugs
1537 * - encoding: unused
1538 * - decoding: set by user, will be converted to upper case by lavc during init
1539 */
1540 unsigned int stream_codec_tag;
1541
1542 /**
1543 * scene change detection threshold.
1544 * 0 is default, larger means fewer detected scene changes
1545 * - encoding: set by user.
1546 * - decoding: unused
1547 */
1548 int scenechange_threshold;
1549
1550 /**
1551 * minimum lagrange multipler
1552 * - encoding: set by user.
1553 * - decoding: unused
1554 */
1555 int lmin;
1556
1557 /**
1558 * maximum lagrange multipler
1559 * - encoding: set by user.
1560 * - decoding: unused
1561 */
1562 int lmax;
1563
1564 /**
1565 * Palette control structure
1566 * - encoding: ??? (no palette-enabled encoder yet)
1567 * - decoding: set by user.
1568 */
1569 struct AVPaletteControl *palctrl;
1570
1571 /**
1572 * noise reduction strength
1573 * - encoding: set by user.
1574 * - decoding: unused
1575 */
1576 int noise_reduction;
1577
1578 /**
1579 * called at the beginning of a frame to get cr buffer for it.
1580 * buffer type (size, hints) must be the same. lavc won't check it.
1581 * lavc will pass previous buffer in pic, function should return
1582 * same buffer or new buffer with old frame "painted" into it.
1583 * if pic.data[0] == NULL must behave like get_buffer().
1584 * - encoding: unused
1585 * - decoding: set by lavc, user can override
1586 */
1587 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1588
1589 /**
1590 * number of bits which should be loaded into the rc buffer before decoding starts
1591 * - encoding: set by user.
1592 * - decoding: unused
1593 */
1594 int rc_initial_buffer_occupancy;
1595
1596 /**
1597 *
1598 * - encoding: set by user.
1599 * - decoding: unused
1600 */
1601 int inter_threshold;
1602
1603 /**
1604 * CODEC_FLAG2_*.
1605 * - encoding: set by user.
1606 * - decoding: set by user.
1607 */
1608 int flags2;
1609
1610 /**
1611 * simulates errors in the bitstream to test error concealment.
1612 * - encoding: set by user.
1613 * - decoding: unused.
1614 */
1615 int error_rate;
1616
1617 /**
1618 * MP3 antialias algorithm, see FF_AA_* below.
1619 * - encoding: unused
1620 * - decoding: set by user
1621 */
1622 int antialias_algo;
1623 #define FF_AA_AUTO 0
1624 #define FF_AA_FASTINT 1 //not implemented yet
1625 #define FF_AA_INT 2
1626 #define FF_AA_FLOAT 3
1627 /**
1628 * Quantizer noise shaping.
1629 * - encoding: set by user
1630 * - decoding: unused
1631 */
1632 int quantizer_noise_shaping;
1633
1634 /**
1635 * Thread count.
1636 * is used to decide how many independant tasks should be passed to execute()
1637 * - encoding: set by user
1638 * - decoding: set by user
1639 */
1640 int thread_count;
1641
1642 /**
1643 * the codec may call this to execute several independant things. it will return only after
1644 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1645 * default implementation will execute the parts serially
1646 * @param count the number of things to execute
1647 * - encoding: set by lavc, user can override
1648 * - decoding: set by lavc, user can override
1649 */
1650 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1651
1652 /**
1653 * Thread opaque.
1654 * can be used by execute() to store some per AVCodecContext stuff.
1655 * - encoding: set by execute()
1656 * - decoding: set by execute()
1657 */
1658 void *thread_opaque;
1659
1660 /**
1661 * Motion estimation threshold. under which no motion estimation is
1662 * performed, but instead the user specified motion vectors are used
1663 *
1664 * - encoding: set by user
1665 * - decoding: unused
1666 */
1667 int me_threshold;
1668
1669 /**
1670 * Macroblock threshold. under which the user specified macroblock types will be used
1671 * - encoding: set by user
1672 * - decoding: unused
1673 */
1674 int mb_threshold;
1675
1676 /**
1677 * precision of the intra dc coefficient - 8.
1678 * - encoding: set by user
1679 * - decoding: unused
1680 */
1681 int intra_dc_precision;
1682
1683 /**
1684 * noise vs. sse weight for the nsse comparsion function.
1685 * - encoding: set by user
1686 * - decoding: unused
1687 */
1688 int nsse_weight;
1689
1690 /**
1691 * number of macroblock rows at the top which are skipped.
1692 * - encoding: unused
1693 * - decoding: set by user
1694 */
1695 int skip_top;
1696
1697 /**
1698 * number of macroblock rows at the bottom which are skipped.
1699 * - encoding: unused
1700 * - decoding: set by user
1701 */
1702 int skip_bottom;
1703
1704 /**
1705 * profile
1706 * - encoding: set by user
1707 * - decoding: set by lavc
1708 */
1709 int profile;
1710 #define FF_PROFILE_UNKNOWN -99
1711
1712 /**
1713 * level
1714 * - encoding: set by user
1715 * - decoding: set by lavc
1716 */
1717 int level;
1718 #define FF_LEVEL_UNKNOWN -99
1719
1720 /**
1721 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1722 * - encoding: unused
1723 * - decoding: set by user
1724 */
1725 int lowres;
1726
1727 /**
1728 * bitsream width / height. may be different from width/height if lowres
1729 * or other things are used
1730 * - encoding: unused
1731 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1732 */
1733 int coded_width, coded_height;
1734
1735 /**
1736 * frame skip threshold
1737 * - encoding: set by user
1738 * - decoding: unused
1739 */
1740 int frame_skip_threshold;
1741
1742 /**
1743 * frame skip factor
1744 * - encoding: set by user
1745 * - decoding: unused
1746 */
1747 int frame_skip_factor;
1748
1749 /**
1750 * frame skip exponent
1751 * - encoding: set by user
1752 * - decoding: unused
1753 */
1754 int frame_skip_exp;
1755
1756 /**
1757 * frame skip comparission function
1758 * - encoding: set by user.
1759 * - decoding: unused
1760 */
1761 int frame_skip_cmp;
1762
1763 /**
1764 * border processing masking. raises the quantizer for mbs on the borders
1765 * of the picture.
1766 * - encoding: set by user
1767 * - decoding: unused
1768 */
1769 float border_masking;
1770
1771 /**
1772 * minimum MB lagrange multipler.
1773 * - encoding: set by user.
1774 * - decoding: unused
1775 */
1776 int mb_lmin;
1777
1778 /**
1779 * maximum MB lagrange multipler.
1780 * - encoding: set by user.
1781 * - decoding: unused
1782 */
1783 int mb_lmax;
1784
1785 /**
1786 *
1787 * - encoding: set by user.
1788 * - decoding: unused
1789 */
1790 int me_penalty_compensation;
1791 } AVCodecContext;
1792
1793
1794 /**
1795 * AVOption.
1796 */
1797 typedef struct AVOption {
1798 /** options' name */
1799 const char *name; /* if name is NULL, it indicates a link to next */
1800 /** short English text help or const struct AVOption* subpointer */
1801 const char *help; // const struct AVOption* sub;
1802 /** offset to context structure where the parsed value should be stored */
1803 int offset;
1804 /** options' type */
1805 int type;
1806 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1807 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1808 #define FF_OPT_TYPE_INT 3 ///< integer
1809 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1810 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1811 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1812 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1813 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1814 /** min value (min == max -> no limits) */
1815 double min;
1816 /** maximum value for double/int */
1817 double max;
1818 /** default boo [0,1]l/double/int value */
1819 double defval;
1820 /**
1821 * default string value (with optional semicolon delimited extra option-list
1822 * i.e. option1;option2;option3
1823 * defval might select other then first argument as default
1824 */
1825 const char *defstr;
1826 #define FF_OPT_MAX_DEPTH 10
1827 } AVOption;
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 void *dummy; // FIXME remove next time we break binary compatibility
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 extern AVCodec x264_encoder;
1924
1925 extern AVCodec h263_decoder;
1926 extern AVCodec h261_decoder;
1927 extern AVCodec mpeg4_decoder;
1928 extern AVCodec msmpeg4v1_decoder;
1929 extern AVCodec msmpeg4v2_decoder;
1930 extern AVCodec msmpeg4v3_decoder;
1931 extern AVCodec wmv1_decoder;
1932 extern AVCodec wmv2_decoder;
1933 extern AVCodec vc9_decoder;
1934 extern AVCodec wmv3_decoder;
1935 extern AVCodec mpeg1video_decoder;
1936 extern AVCodec mpeg2video_decoder;
1937 extern AVCodec mpegvideo_decoder;
1938 extern AVCodec mpeg_xvmc_decoder;
1939 extern AVCodec h263i_decoder;
1940 extern AVCodec flv_decoder;
1941 extern AVCodec rv10_decoder;
1942 extern AVCodec rv20_decoder;
1943 extern AVCodec rv30_decoder;
1944 extern AVCodec rv40_decoder;
1945 extern AVCodec svq1_decoder;
1946 extern AVCodec svq3_decoder;
1947 extern AVCodec dvvideo_decoder;
1948 extern AVCodec wmav1_decoder;
1949 extern AVCodec wmav2_decoder;
1950 extern AVCodec mjpeg_decoder;
1951 extern AVCodec mjpegb_decoder;
1952 extern AVCodec sp5x_decoder;
1953 extern AVCodec png_decoder;
1954 extern AVCodec mp2_decoder;
1955 extern AVCodec mp3_decoder;
1956 extern AVCodec mp3adu_decoder;
1957 extern AVCodec mp3on4_decoder;
1958 extern AVCodec mace3_decoder;
1959 extern AVCodec mace6_decoder;
1960 extern AVCodec huffyuv_decoder;
1961 extern AVCodec ffvhuff_decoder;
1962 extern AVCodec oggvorbis_decoder;
1963 extern AVCodec oggtheora_decoder;
1964 extern AVCodec cyuv_decoder;
1965 extern AVCodec h264_decoder;
1966 extern AVCodec indeo3_decoder;
1967 extern AVCodec vp3_decoder;
1968 extern AVCodec theora_decoder;
1969 extern AVCodec amr_nb_decoder;
1970 extern AVCodec amr_nb_encoder;
1971 extern AVCodec amr_wb_encoder;
1972 extern AVCodec amr_wb_decoder;
1973 extern AVCodec aac_decoder;
1974 extern AVCodec mpeg4aac_decoder;
1975 extern AVCodec asv1_decoder;
1976 extern AVCodec asv2_decoder;
1977 extern AVCodec vcr1_decoder;
1978 extern AVCodec cljr_decoder;
1979 extern AVCodec ffv1_decoder;
1980 extern AVCodec snow_decoder;
1981 extern AVCodec fourxm_decoder;
1982 extern AVCodec mdec_decoder;
1983 extern AVCodec roq_decoder;
1984 extern AVCodec interplay_video_decoder;
1985 extern AVCodec xan_wc3_decoder;
1986 extern AVCodec rpza_decoder;
1987 extern AVCodec cinepak_decoder;
1988 extern AVCodec msrle_decoder;
1989 extern AVCodec msvideo1_decoder;
1990 extern AVCodec vqa_decoder;
1991 extern AVCodec idcin_decoder;
1992 extern AVCodec eightbps_decoder;
1993 extern AVCodec smc_decoder;
1994 extern AVCodec flic_decoder;
1995 extern AVCodec vmdvideo_decoder;
1996 extern AVCodec vmdaudio_decoder;
1997 extern AVCodec truemotion1_decoder;
1998 extern AVCodec mszh_decoder;
1999 extern AVCodec zlib_decoder;
2000 extern AVCodec ra_144_decoder;
2001 extern AVCodec ra_288_decoder;
2002 extern AVCodec roq_dpcm_decoder;
2003 extern AVCodec interplay_dpcm_decoder;
2004 extern AVCodec xan_dpcm_decoder;
2005 extern AVCodec sol_dpcm_decoder;
2006 extern AVCodec sonic_decoder;
2007 extern AVCodec qtrle_decoder;
2008 extern AVCodec flac_decoder;
2009 extern AVCodec tscc_decoder;
2010 extern AVCodec ulti_decoder;
2011 extern AVCodec qdraw_decoder;
2012 extern AVCodec xl_decoder;
2013 extern AVCodec qpeg_decoder;
2014 extern AVCodec shorten_decoder;
2015 extern AVCodec loco_decoder;
2016 extern AVCodec wnv1_decoder;
2017 extern AVCodec aasc_decoder;
2018 extern AVCodec alac_decoder;
2019 extern AVCodec ws_snd1_decoder;
2020 extern AVCodec indeo2_decoder;
2021 extern AVCodec vorbis_decoder;
2022
2023 /* pcm codecs */
2024 #define PCM_CODEC(id, name) \
2025 extern AVCodec name ## _decoder; \
2026 extern AVCodec name ## _encoder
2027
2028 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2029 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2030 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2031 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2032 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2033 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2034 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2035 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2036
2037 /* adpcm codecs */
2038
2039 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2040 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2041 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2042 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2043 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2044 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2045 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2046 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2047 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2048 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2049 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2050 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2051 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2052 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2053
2054 #undef PCM_CODEC
2055
2056 /* dummy raw video codec */
2057 extern AVCodec rawvideo_encoder;
2058 extern AVCodec rawvideo_decoder;
2059
2060 /* the following codecs use external GPL libs */
2061 extern AVCodec ac3_decoder;
2062 extern AVCodec dts_decoder;
2063
2064 /* resample.c */
2065
2066 struct ReSampleContext;
2067 struct AVResampleContext;
2068
2069 typedef struct ReSampleContext ReSampleContext;
2070
2071 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2072 int output_rate, int input_rate);
2073 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2074 void audio_resample_close(ReSampleContext *s);
2075
2076 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2077 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2078 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2079 void av_resample_close(struct AVResampleContext *c);
2080
2081 /* YUV420 format is assumed ! */
2082
2083 struct ImgReSampleContext;
2084
2085 typedef struct ImgReSampleContext ImgReSampleContext;
2086
2087 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2088 int input_width, int input_height);
2089
2090 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2091 int iwidth, int iheight,
2092 int topBand, int bottomBand,
2093 int leftBand, int rightBand,
2094 int padtop, int padbottom,
2095 int padleft, int padright);
2096
2097
2098 void img_resample(ImgReSampleContext *s,
2099 AVPicture *output, const AVPicture *input);
2100
2101 void img_resample_close(ImgReSampleContext *s);
2102
2103 /**
2104 * Allocate memory for a picture. Call avpicture_free to free it.
2105 *
2106 * @param picture the picture to be filled in.
2107 * @param pix_fmt the format of the picture.
2108 * @param width the width of the picture.
2109 * @param height the height of the picture.
2110 * @return 0 if successful, -1 if not.
2111 */
2112 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2113
2114 /* Free a picture previously allocated by avpicture_alloc. */
2115 void avpicture_free(AVPicture *picture);
2116
2117 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2118 int pix_fmt, int width, int height);
2119 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2120 unsigned char *dest, int dest_size);
2121 int avpicture_get_size(int pix_fmt, int width, int height);
2122 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2123 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2124 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2125 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2126 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2127
2128 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2129 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2130 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2131 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2132 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2133 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2134
2135 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2136 int has_alpha);
2137 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2138 int has_alpha, int *loss_ptr);
2139
2140 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2141 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2142 int img_get_alpha_info(const AVPicture *src,
2143 int pix_fmt, int width, int height);
2144
2145 /* convert among pixel formats */
2146 int img_convert(AVPicture *dst, int dst_pix_fmt,
2147 const AVPicture *src, int pix_fmt,
2148 int width, int height);
2149
2150 /* deinterlace a picture */
2151 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2152 int pix_fmt, int width, int height);
2153
2154 /* external high level API */
2155
2156 extern AVCodec *first_avcodec;
2157
2158 /* returns LIBAVCODEC_VERSION_INT constant */
2159 unsigned avcodec_version(void);
2160 /* returns LIBAVCODEC_BUILD constant */
2161 unsigned avcodec_build(void);
2162 void avcodec_init(void);
2163
2164 void register_avcodec(AVCodec *format);
2165 AVCodec *avcodec_find_encoder(enum CodecID id);
2166 AVCodec *avcodec_find_encoder_by_name(const char *name);
2167 AVCodec *avcodec_find_decoder(enum CodecID id);
2168 AVCodec *avcodec_find_decoder_by_name(const char *name);
2169 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2170
2171 void avcodec_get_context_defaults(AVCodecContext *s);
2172 AVCodecContext *avcodec_alloc_context(void);
2173 void avcodec_get_frame_defaults(AVFrame *pic);
2174 AVFrame *avcodec_alloc_frame(void);
2175
2176 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2177 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2178 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2179 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2180 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2181 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2182
2183 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2184 void avcodec_thread_free(AVCodecContext *s);
2185 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2186 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2187 //FIXME func typedef
2188
2189 /**
2190 * opens / inits the AVCodecContext.
2191 * not thread save!
2192 */
2193 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2194
2195 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2196 int *frame_size_ptr,
2197 uint8_t *buf, int buf_size);
2198 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2199 int *got_picture_ptr,
2200 uint8_t *buf, int buf_size);
2201 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2202 int *data_size_ptr,
2203 uint8_t *buf, int buf_size);
2204 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2205 const short *samples);
2206 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2207 const AVFrame *pict);
2208
2209 int avcodec_close(AVCodecContext *avctx);
2210
2211 void avcodec_register_all(void);
2212
2213 void avcodec_flush_buffers(AVCodecContext *avctx);
2214
2215 void avcodec_default_free_buffers(AVCodecContext *s);
2216
2217 /* misc usefull functions */
2218
2219 /**
2220 * returns a single letter to describe the picture type
2221 */
2222 char av_get_pict_type_char(int pict_type);
2223
2224 /**
2225 * reduce a fraction.
2226 * this is usefull for framerate calculations
2227 * @param max the maximum allowed for dst_nom & dst_den
2228 * @return 1 if exact, 0 otherwise
2229 */
2230 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2231
2232 /**
2233 * rescale a 64bit integer with rounding to nearest.
2234 * a simple a*b/c isnt possible as it can overflow
2235 */
2236 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2237
2238 /**
2239 * rescale a 64bit integer with specified rounding.
2240 * a simple a*b/c isnt possible as it can overflow
2241 */
2242 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
2243
2244 /**
2245 * rescale a 64bit integer by 2 rational numbers.
2246 */
2247 int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq);
2248
2249 /* frame parsing */
2250 typedef struct AVCodecParserContext {
2251 void *priv_data;
2252 struct AVCodecParser *parser;
2253 int64_t frame_offset; /* offset of the current frame */
2254 int64_t cur_offset; /* current offset
2255 (incremented by each av_parser_parse()) */
2256 int64_t last_frame_offset; /* offset of the last frame */
2257 /* video info */
2258 int pict_type; /* XXX: put it back in AVCodecContext */
2259 int repeat_pict; /* XXX: put it back in AVCodecContext */
2260 int64_t pts; /* pts of the current frame */
2261 int64_t dts; /* dts of the current frame */
2262
2263 /* private data */
2264 int64_t last_pts;
2265 int64_t last_dts;
2266 int fetch_timestamp;
2267
2268 #define AV_PARSER_PTS_NB 4
2269 int cur_frame_start_index;
2270 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2271 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2272 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2273 } AVCodecParserContext;
2274
2275 typedef struct AVCodecParser {
2276 int codec_ids[5]; /* several codec IDs are permitted */
2277 int priv_data_size;
2278 int (*parser_init)(AVCodecParserContext *s);
2279 int (*parser_parse)(AVCodecParserContext *s,
2280 AVCodecContext *avctx,
2281 uint8_t **poutbuf, int *poutbuf_size,
2282 const uint8_t *buf, int buf_size);
2283 void (*parser_close)(AVCodecParserContext *s);
2284 struct AVCodecParser *next;
2285 } AVCodecParser;
2286
2287 extern AVCodecParser *av_first_parser;
2288
2289 void av_register_codec_parser(AVCodecParser *parser);
2290 AVCodecParserContext *av_parser_init(int codec_id);
2291 int av_parser_parse(AVCodecParserContext *s,
2292 AVCodecContext *avctx,
2293 uint8_t **poutbuf, int *poutbuf_size,
2294 const uint8_t *buf, int buf_size,
2295 int64_t pts, int64_t dts);
2296 void av_parser_close(AVCodecParserContext *s);
2297
2298 extern AVCodecParser mpegvideo_parser;
2299 extern AVCodecParser mpeg4video_parser;
2300 extern AVCodecParser h261_parser;
2301 extern AVCodecParser h263_parser;
2302 extern AVCodecParser h264_parser;
2303 extern AVCodecParser mjpeg_parser;
2304 extern AVCodecParser pnm_parser;
2305 extern AVCodecParser mpegaudio_parser;
2306 extern AVCodecParser ac3_parser;
2307
2308 /* memory */
2309 void *av_malloc(unsigned int size);
2310 void *av_mallocz(unsigned int size);
2311 void *av_realloc(void *ptr, unsigned int size);
2312 void av_free(void *ptr);
2313 char *av_strdup(const char *s);
2314 void av_freep(void *ptr);
2315 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2316 /* for static data only */
2317 /* call av_free_static to release all staticaly allocated tables */
2318 void av_free_static(void);
2319 void *av_mallocz_static(unsigned int size);
2320 void *av_realloc_static(void *ptr, unsigned int size);
2321
2322 /* add by bero : in adx.c */
2323 int is_adx(const unsigned char *buf,size_t bufsize);
2324
2325 void img_copy(AVPicture *dst, const AVPicture *src,
2326 int pix_fmt, int width, int height);
2327
2328 /* av_log API */
2329
2330 #include <stdarg.h>
2331
2332 #define AV_LOG_QUIET -1
2333 #define AV_LOG_ERROR 0
2334 #define AV_LOG_INFO 1
2335 #define AV_LOG_DEBUG 2
2336
2337 #ifdef __GNUC__
2338 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2339 #else
2340 extern void av_log(void*, int level, const char *fmt, ...);
2341 #endif
2342
2343 extern void av_vlog(void*, int level, const char *fmt, va_list);
2344 extern int av_log_get_level(void);
2345 extern void av_log_set_level(int);
2346 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2347
2348 /* endian macros */
2349 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2350 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2351 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2352 (((uint8_t*)(x))[1] << 16) | \
2353 (((uint8_t*)(x))[2] << 8) | \
2354 ((uint8_t*)(x))[3])
2355 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2356 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2357 (((uint8_t*)(x))[2] << 16) | \
2358 (((uint8_t*)(x))[1] << 8) | \
2359 ((uint8_t*)(x))[0])
2360 #endif
2361
2362 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2363
2364 #ifdef __cplusplus
2365 }
2366 #endif
2367
2368 #endif /* AVCODEC_H */