Fraps FPS1 video decoder (v1 & v2), courtesy of Roine Gustafsson <roine
[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 4755
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 CODEC_ID_FRAPS,
113
114 /* various pcm "codecs" */
115 CODEC_ID_PCM_S16LE= 0x10000,
116 CODEC_ID_PCM_S16BE,
117 CODEC_ID_PCM_U16LE,
118 CODEC_ID_PCM_U16BE,
119 CODEC_ID_PCM_S8,
120 CODEC_ID_PCM_U8,
121 CODEC_ID_PCM_MULAW,
122 CODEC_ID_PCM_ALAW,
123
124 /* various adpcm codecs */
125 CODEC_ID_ADPCM_IMA_QT= 0x11000,
126 CODEC_ID_ADPCM_IMA_WAV,
127 CODEC_ID_ADPCM_IMA_DK3,
128 CODEC_ID_ADPCM_IMA_DK4,
129 CODEC_ID_ADPCM_IMA_WS,
130 CODEC_ID_ADPCM_IMA_SMJPEG,
131 CODEC_ID_ADPCM_MS,
132 CODEC_ID_ADPCM_4XM,
133 CODEC_ID_ADPCM_XA,
134 CODEC_ID_ADPCM_ADX,
135 CODEC_ID_ADPCM_EA,
136 CODEC_ID_ADPCM_G726,
137 CODEC_ID_ADPCM_CT,
138 CODEC_ID_ADPCM_SWF,
139
140 /* AMR */
141 CODEC_ID_AMR_NB= 0x12000,
142 CODEC_ID_AMR_WB,
143
144 /* RealAudio codecs*/
145 CODEC_ID_RA_144= 0x13000,
146 CODEC_ID_RA_288,
147
148 /* various DPCM codecs */
149 CODEC_ID_ROQ_DPCM= 0x14000,
150 CODEC_ID_INTERPLAY_DPCM,
151 CODEC_ID_XAN_DPCM,
152 CODEC_ID_SOL_DPCM,
153
154 CODEC_ID_MP2= 0x15000,
155 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
156 CODEC_ID_AAC,
157 CODEC_ID_MPEG4AAC,
158 CODEC_ID_AC3,
159 CODEC_ID_DTS,
160 CODEC_ID_VORBIS,
161 CODEC_ID_DVAUDIO,
162 CODEC_ID_WMAV1,
163 CODEC_ID_WMAV2,
164 CODEC_ID_MACE3,
165 CODEC_ID_MACE6,
166 CODEC_ID_VMDAUDIO,
167 CODEC_ID_SONIC,
168 CODEC_ID_SONIC_LS,
169 CODEC_ID_FLAC,
170 CODEC_ID_MP3ADU,
171 CODEC_ID_MP3ON4,
172 CODEC_ID_SHORTEN,
173 CODEC_ID_ALAC,
174 CODEC_ID_WESTWOOD_SND1,
175
176 CODEC_ID_OGGTHEORA= 0x16000,
177
178 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
179 stream (only used by libavformat) */
180 };
181
182 /* CODEC_ID_MP3LAME is absolete */
183 #define CODEC_ID_MP3LAME CODEC_ID_MP3
184
185 enum CodecType {
186 CODEC_TYPE_UNKNOWN = -1,
187 CODEC_TYPE_VIDEO,
188 CODEC_TYPE_AUDIO,
189 CODEC_TYPE_DATA,
190 };
191
192 /**
193 * Pixel format. Notes:
194 *
195 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
196 * color is put together as:
197 * (A << 24) | (R << 16) | (G << 8) | B
198 * This is stored as BGRA on little endian CPU architectures and ARGB on
199 * big endian CPUs.
200 *
201 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
202 * image data is stored in AVFrame.data[0]. The palette is transported in
203 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
204 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
205 * also endian-specific). Note also that the individual RGB palette
206 * components stored in AVFrame.data[1] should be in the range 0..255.
207 * This is important as many custom PAL8 video codecs that were designed
208 * to run on the IBM VGA graphics adapter use 6-bit palette components.
209 */
210 enum PixelFormat {
211 PIX_FMT_NONE= -1,
212 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
213 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
214 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
215 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
216 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
217 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
218 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
219 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
220 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
221 PIX_FMT_RGB565, ///< always stored in cpu endianness
222 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
223 PIX_FMT_GRAY8,
224 PIX_FMT_MONOWHITE, ///< 0 is white
225 PIX_FMT_MONOBLACK, ///< 0 is black
226 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
227 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
228 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
229 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
230 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
231 PIX_FMT_XVMC_MPEG2_IDCT,
232 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
233 PIX_FMT_UYVY411, ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
234 PIX_FMT_NB,
235 };
236
237 /* currently unused, may be used if 24/32 bits samples ever supported */
238 enum SampleFormat {
239 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
240 SAMPLE_FMT_S32, ///< signed 32 bits
241 SAMPLE_FMT_FLT, ///< float
242 SAMPLE_FMT_DBL, ///< double
243 };
244
245 /* in bytes */
246 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
247
248 /**
249 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
250 * this is mainly needed because some optimized bitstream readers read
251 * 32 or 64 bit at once and could read over the end<br>
252 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
253 * MPEG bitstreams could cause overread and segfault
254 */
255 #define FF_INPUT_BUFFER_PADDING_SIZE 8
256
257 /**
258 * minimum encoding buffer size.
259 * used to avoid some checks during header writing
260 */
261 #define FF_MIN_BUFFER_SIZE 16384
262
263 /* motion estimation type, EPZS by default */
264 enum Motion_Est_ID {
265 ME_ZERO = 1,
266 ME_FULL,
267 ME_LOG,
268 ME_PHODS,
269 ME_EPZS,
270 ME_X1
271 };
272
273 enum AVRounding {
274 AV_ROUND_ZERO = 0, ///< round toward zero
275 AV_ROUND_INF = 1, ///< round away from zero
276 AV_ROUND_DOWN = 2, ///< round toward -infinity
277 AV_ROUND_UP = 3, ///< round toward +infinity
278 AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
279 };
280
281 typedef struct RcOverride{
282 int start_frame;
283 int end_frame;
284 int qscale; // if this is 0 then quality_factor will be used instead
285 float quality_factor;
286 } RcOverride;
287
288 /* only for ME compatiblity with old apps */
289 extern int motion_estimation_method;
290
291 #define FF_MAX_B_FRAMES 8
292
293 /* encoding support
294 these flags can be passed in AVCodecContext.flags before initing
295 Note: note not everything is supported yet
296 */
297
298 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
299 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
300 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
301 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
302 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
303 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
304 /* parent program gurantees that the input for b-frame containing streams is not written to
305 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
306 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
307 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
308 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
309 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
310 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
311 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
312 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
313 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
314 of only at frame boundaries */
315 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
316 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
317 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
318 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
319 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
320 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
321 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
322 /* Fx : Flag for h263+ extra options */
323 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
324 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
325 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
326 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
327 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
328 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
329 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
330 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
331 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
332 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
333 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
334 #define CODEC_FLAG_CLOSED_GOP 0x80000000
335 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
336 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
337 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
338
339 /* Unsupported options :
340 * Syntax Arithmetic coding (SAC)
341 * Reference Picture Selection
342 * Independant Segment Decoding */
343 /* /Fx */
344 /* codec capabilities */
345
346 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
347 /**
348 * Codec uses get_buffer() for allocating buffers.
349 * direct rendering method 1
350 */
351 #define CODEC_CAP_DR1 0x0002
352 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
353 used */
354 #define CODEC_CAP_PARSE_ONLY 0x0004
355 #define CODEC_CAP_TRUNCATED 0x0008
356 /* codec can export data for HW decoding (XvMC) */
357 #define CODEC_CAP_HWACCEL 0x0010
358 /**
359 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
360 * if this is not set, the codec is guranteed to never be feeded with NULL data
361 */
362 #define CODEC_CAP_DELAY 0x0020
363
364 //the following defines might change, so dont expect compatibility if u use them
365 #define MB_TYPE_INTRA4x4 0x0001
366 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
367 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
368 #define MB_TYPE_16x16 0x0008
369 #define MB_TYPE_16x8 0x0010
370 #define MB_TYPE_8x16 0x0020
371 #define MB_TYPE_8x8 0x0040
372 #define MB_TYPE_INTERLACED 0x0080
373 #define MB_TYPE_DIRECT2 0x0100 //FIXME
374 #define MB_TYPE_ACPRED 0x0200
375 #define MB_TYPE_GMC 0x0400
376 #define MB_TYPE_SKIP 0x0800
377 #define MB_TYPE_P0L0 0x1000
378 #define MB_TYPE_P1L0 0x2000
379 #define MB_TYPE_P0L1 0x4000
380 #define MB_TYPE_P1L1 0x8000
381 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
382 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
383 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
384 #define MB_TYPE_QUANT 0x00010000
385 #define MB_TYPE_CBP 0x00020000
386 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
387
388 /**
389 * Pan Scan area.
390 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
391 */
392 typedef struct AVPanScan{
393 /**
394 * id.
395 * - encoding: set by user.
396 * - decoding: set by lavc
397 */
398 int id;
399
400 /**
401 * width and height in 1/16 pel
402 * - encoding: set by user.
403 * - decoding: set by lavc
404 */
405 int width;
406 int height;
407
408 /**
409 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
410 * - encoding: set by user.
411 * - decoding: set by lavc
412 */
413 int16_t position[3][2];
414 }AVPanScan;
415
416 #define FF_COMMON_FRAME \
417 /**\
418 * pointer to the picture planes.\
419 * this might be different from the first allocated byte\
420 * - encoding: \
421 * - decoding: \
422 */\
423 uint8_t *data[4];\
424 int linesize[4];\
425 /**\
426 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
427 * this isnt used by lavc unless the default get/release_buffer() is used\
428 * - encoding: \
429 * - decoding: \
430 */\
431 uint8_t *base[4];\
432 /**\
433 * 1 -> keyframe, 0-> not\
434 * - encoding: set by lavc\
435 * - decoding: set by lavc\
436 */\
437 int key_frame;\
438 \
439 /**\
440 * picture type of the frame, see ?_TYPE below.\
441 * - encoding: set by lavc for coded_picture (and set by user for input)\
442 * - decoding: set by lavc\
443 */\
444 int pict_type;\
445 \
446 /**\
447 * presentation timestamp in time_base units (time when frame should be shown to user)\
448 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
449 * - encoding: MUST be set by user\
450 * - decoding: set by lavc\
451 */\
452 int64_t pts;\
453 \
454 /**\
455 * picture number in bitstream order.\
456 * - encoding: set by\
457 * - decoding: set by lavc\
458 */\
459 int coded_picture_number;\
460 /**\
461 * picture number in display order.\
462 * - encoding: set by\
463 * - decoding: set by lavc\
464 */\
465 int display_picture_number;\
466 \
467 /**\
468 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
469 * - encoding: set by lavc for coded_picture (and set by user for input)\
470 * - decoding: set by lavc\
471 */\
472 int quality; \
473 \
474 /**\
475 * buffer age (1->was last buffer and dint change, 2->..., ...).\
476 * set to INT_MAX if the buffer has not been used yet \
477 * - encoding: unused\
478 * - decoding: MUST be set by get_buffer()\
479 */\
480 int age;\
481 \
482 /**\
483 * is this picture used as reference\
484 * - encoding: unused\
485 * - decoding: set by lavc (before get_buffer() call))\
486 */\
487 int reference;\
488 \
489 /**\
490 * QP table\
491 * - encoding: unused\
492 * - decoding: set by lavc\
493 */\
494 int8_t *qscale_table;\
495 /**\
496 * QP store stride\
497 * - encoding: unused\
498 * - decoding: set by lavc\
499 */\
500 int qstride;\
501 \
502 /**\
503 * mbskip_table[mb]>=1 if MB didnt change\
504 * stride= mb_width = (width+15)>>4\
505 * - encoding: unused\
506 * - decoding: set by lavc\
507 */\
508 uint8_t *mbskip_table;\
509 \
510 /**\
511 * Motion vector table.\
512 * @code\
513 * example:\
514 * int mv_sample_log2= 4 - motion_subsample_log2;\
515 * int mb_width= (width+15)>>4;\
516 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
517 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
518 * @endcode\
519 * - encoding: set by user\
520 * - decoding: set by lavc\
521 */\
522 int16_t (*motion_val[2])[2];\
523 \
524 /**\
525 * Macroblock type table\
526 * mb_type_base + mb_width + 2\
527 * - encoding: set by user\
528 * - decoding: set by lavc\
529 */\
530 uint32_t *mb_type;\
531 \
532 /**\
533 * log2 of the size of the block which a single vector in motion_val represents: \
534 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
535 * - encoding: unused\
536 * - decoding: set by lavc\
537 */\
538 uint8_t motion_subsample_log2;\
539 \
540 /**\
541 * for some private data of the user\
542 * - encoding: unused\
543 * - decoding: set by user\
544 */\
545 void *opaque;\
546 \
547 /**\
548 * error\
549 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
550 * - decoding: unused\
551 */\
552 uint64_t error[4];\
553 \
554 /**\
555 * type of the buffer (to keep track of who has to dealloc data[*])\
556 * - encoding: set by the one who allocs it\
557 * - decoding: set by the one who allocs it\
558 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
559 */\
560 int type;\
561 \
562 /**\
563 * when decoding, this signal how much the picture must be delayed.\
564 * extra_delay = repeat_pict / (2*fps)\
565 * - encoding: unused\
566 * - decoding: set by lavc\
567 */\
568 int repeat_pict;\
569 \
570 /**\
571 * \
572 */\
573 int qscale_type;\
574 \
575 /**\
576 * The content of the picture is interlaced.\
577 * - encoding: set by user\
578 * - decoding: set by lavc (default 0)\
579 */\
580 int interlaced_frame;\
581 \
582 /**\
583 * if the content is interlaced, is top field displayed first.\
584 * - encoding: set by user\
585 * - decoding: set by lavc\
586 */\
587 int top_field_first;\
588 \
589 /**\
590 * Pan scan.\
591 * - encoding: set by user\
592 * - decoding: set by lavc\
593 */\
594 AVPanScan *pan_scan;\
595 \
596 /**\
597 * tell user application that palette has changed from previous frame.\
598 * - encoding: ??? (no palette-enabled encoder yet)\
599 * - decoding: set by lavc (default 0)\
600 */\
601 int palette_has_changed;\
602 \
603 /**\
604 * Codec suggestion on buffer type if != 0\
605 * - encoding: unused\
606 * - decoding: set by lavc (before get_buffer() call))\
607 */\
608 int buffer_hints;\
609 \
610 /**\
611 * DCT coeffitients\
612 * - encoding: unused\
613 * - decoding: set by lavc\
614 */\
615 short *dct_coeff;\
616 \
617 /**\
618 * Motion referece frame index\
619 * - encoding: set by user\
620 * - decoding: set by lavc\
621 */\
622 int8_t *ref_index[2];
623
624 #define FF_QSCALE_TYPE_MPEG1 0
625 #define FF_QSCALE_TYPE_MPEG2 1
626
627 #define FF_BUFFER_TYPE_INTERNAL 1
628 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
629 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base), all other tables are not shared
630 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
631
632
633 #define FF_I_TYPE 1 // Intra
634 #define FF_P_TYPE 2 // Predicted
635 #define FF_B_TYPE 3 // Bi-dir predicted
636 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
637 #define FF_SI_TYPE 5
638 #define FF_SP_TYPE 6
639
640 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
641 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
642 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
643 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
644
645 /**
646 * Audio Video Frame.
647 */
648 typedef struct AVFrame {
649 FF_COMMON_FRAME
650 } AVFrame;
651
652 #define DEFAULT_FRAME_RATE_BASE 1001000
653
654 /**
655 * Used by av_log
656 */
657 typedef struct AVCLASS AVClass;
658 struct AVCLASS {
659 const char* class_name;
660 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
661 or AVFormatContext, which begin with an AVClass.
662 Needed because av_log is in libavcodec and has no visibility
663 of AVIn/OutputFormat */
664 };
665
666 /**
667 * main external api structure.
668 */
669 typedef struct AVCodecContext {
670 /**
671 * Info on struct for av_log
672 * - set by avcodec_alloc_context
673 */
674 AVClass *av_class;
675 /**
676 * the average bitrate.
677 * - encoding: set by user. unused for constant quantizer encoding
678 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
679 */
680 int bit_rate;
681
682 /**
683 * number of bits the bitstream is allowed to diverge from the reference.
684 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
685 * - encoding: set by user. unused for constant quantizer encoding
686 * - decoding: unused
687 */
688 int bit_rate_tolerance;
689
690 /**
691 * CODEC_FLAG_*.
692 * - encoding: set by user.
693 * - decoding: set by user.
694 */
695 int flags;
696
697 /**
698 * some codecs needs additionnal format info. It is stored here
699 * - encoding: set by user.
700 * - decoding: set by lavc. (FIXME is this ok?)
701 */
702 int sub_id;
703
704 /**
705 * motion estimation algorithm used for video coding.
706 * - encoding: MUST be set by user.
707 * - decoding: unused
708 */
709 int me_method;
710
711 /**
712 * some codecs need / can use extra-data like huffman tables.
713 * mjpeg: huffman tables
714 * rv10: additional flags
715 * mpeg4: global headers (they can be in the bitstream or here)
716 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
717 * then extradata_size to avoid prolems if its read with the bitstream reader
718 * - encoding: set/allocated/freed by lavc.
719 * - decoding: set/allocated/freed by user.
720 */
721 void *extradata;
722 int extradata_size;
723
724 /* video only */
725 /**
726 * time base in which the timestamps are specified.
727 * - encoding: MUST be set by user
728 * - decoding: set by lavc.
729 */
730 AVRational time_base;
731
732 /**
733 * picture width / height.
734 * - encoding: MUST be set by user.
735 * - decoding: set by lavc.
736 * Note, for compatibility its possible to set this instead of
737 * coded_width/height before decoding
738 */
739 int width, height;
740
741 #define FF_ASPECT_EXTENDED 15
742
743 /**
744 * the number of pictures in a group of pitures, or 0 for intra_only.
745 * - encoding: set by user.
746 * - decoding: unused
747 */
748 int gop_size;
749
750 /**
751 * pixel format, see PIX_FMT_xxx.
752 * - encoding: set by user.
753 * - decoding: set by lavc.
754 */
755 enum PixelFormat pix_fmt;
756
757 /**
758 * Frame rate emulation. If not zero lower layer (i.e. format handler)
759 * has to read frames at native frame rate.
760 * - encoding: set by user.
761 * - decoding: unused.
762 */
763 int rate_emu;
764
765 /**
766 * if non NULL, 'draw_horiz_band' is called by the libavcodec
767 * decoder to draw an horizontal band. It improve cache usage. Not
768 * all codecs can do that. You must check the codec capabilities
769 * before
770 * - encoding: unused
771 * - decoding: set by user.
772 * @param height the height of the slice
773 * @param y the y position of the slice
774 * @param type 1->top field, 2->bottom field, 3->frame
775 * @param offset offset into the AVFrame.data from which the slice should be read
776 */
777 void (*draw_horiz_band)(struct AVCodecContext *s,
778 const AVFrame *src, int offset[4],
779 int y, int type, int height);
780
781 /* audio only */
782 int sample_rate; ///< samples per sec
783 int channels;
784
785 /**
786 * audio sample format.
787 * - encoding: set by user.
788 * - decoding: set by lavc.
789 */
790 enum SampleFormat sample_fmt; ///< sample format, currenly unused
791
792 /* the following data should not be initialized */
793 int frame_size; ///< in samples, initialized when calling 'init'
794 int frame_number; ///< audio or video frame number
795 int real_pict_num; ///< returns the real picture number of previous encoded frame
796
797 /**
798 * number of frames the decoded output will be delayed relative to
799 * the encoded input.
800 * - encoding: set by lavc.
801 * - decoding: unused
802 */
803 int delay;
804
805 /* - encoding parameters */
806 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
807 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
808
809 /**
810 * minimum quantizer.
811 * - encoding: set by user.
812 * - decoding: unused
813 */
814 int qmin;
815
816 /**
817 * maximum quantizer.
818 * - encoding: set by user.
819 * - decoding: unused
820 */
821 int qmax;
822
823 /**
824 * maximum quantizer difference etween frames.
825 * - encoding: set by user.
826 * - decoding: unused
827 */
828 int max_qdiff;
829
830 /**
831 * maximum number of b frames between non b frames.
832 * note: the output will be delayed by max_b_frames+1 relative to the input
833 * - encoding: set by user.
834 * - decoding: unused
835 */
836 int max_b_frames;
837
838 /**
839 * qscale factor between ip and b frames.
840 * - encoding: set by user.
841 * - decoding: unused
842 */
843 float b_quant_factor;
844
845 /** obsolete FIXME remove */
846 int rc_strategy;
847 int b_frame_strategy;
848
849 /**
850 * hurry up amount.
851 * - encoding: unused
852 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
853 */
854 int hurry_up;
855
856 struct AVCodec *codec;
857
858 void *priv_data;
859
860 /* unused, FIXME remove*/
861 int rtp_mode;
862
863 int rtp_payload_size; /* The size of the RTP payload, the coder will */
864 /* do it's best to deliver a chunk with size */
865 /* below rtp_payload_size, the chunk will start */
866 /* with a start code on some codecs like H.263 */
867 /* This doesn't take account of any particular */
868 /* headers inside the transmited RTP payload */
869
870
871 /* The RTP callcack: This function is called */
872 /* every time the encoder as a packet to send */
873 /* Depends on the encoder if the data starts */
874 /* with a Start Code (it should) H.263 does. */
875 /* mb_nb contains the number of macroblocks */
876 /* encoded in the RTP payload */
877 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
878
879 /* statistics, used for 2-pass encoding */
880 int mv_bits;
881 int header_bits;
882 int i_tex_bits;
883 int p_tex_bits;
884 int i_count;
885 int p_count;
886 int skip_count;
887 int misc_bits;
888
889 /**
890 * number of bits used for the previously encoded frame.
891 * - encoding: set by lavc
892 * - decoding: unused
893 */
894 int frame_bits;
895
896 /**
897 * private data of the user, can be used to carry app specific stuff.
898 * - encoding: set by user
899 * - decoding: set by user
900 */
901 void *opaque;
902
903 char codec_name[32];
904 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
905 enum CodecID codec_id; /* see CODEC_ID_xxx */
906
907 /**
908 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
909 * this is used to workaround some encoder bugs
910 * - encoding: set by user, if not then the default based on codec_id will be used
911 * - decoding: set by user, will be converted to upper case by lavc during init
912 */
913 unsigned int codec_tag;
914
915 /**
916 * workaround bugs in encoders which sometimes cannot be detected automatically.
917 * - encoding: set by user
918 * - decoding: set by user
919 */
920 int workaround_bugs;
921 #define FF_BUG_AUTODETECT 1 ///< autodetection
922 #define FF_BUG_OLD_MSMPEG4 2
923 #define FF_BUG_XVID_ILACE 4
924 #define FF_BUG_UMP4 8
925 #define FF_BUG_NO_PADDING 16
926 #define FF_BUG_AMV 32
927 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
928 #define FF_BUG_QPEL_CHROMA 64
929 #define FF_BUG_STD_QPEL 128
930 #define FF_BUG_QPEL_CHROMA2 256
931 #define FF_BUG_DIRECT_BLOCKSIZE 512
932 #define FF_BUG_EDGE 1024
933 #define FF_BUG_HPEL_CHROMA 2048
934 #define FF_BUG_DC_CLIP 4096
935 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
936 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
937
938 /**
939 * luma single coeff elimination threshold.
940 * - encoding: set by user
941 * - decoding: unused
942 */
943 int luma_elim_threshold;
944
945 /**
946 * chroma single coeff elimination threshold.
947 * - encoding: set by user
948 * - decoding: unused
949 */
950 int chroma_elim_threshold;
951
952 /**
953 * strictly follow the std (MPEG4, ...).
954 * - encoding: set by user
955 * - decoding: unused
956 */
957 int strict_std_compliance;
958 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
959 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
960 #define FF_COMPLIANCE_NORMAL 0
961 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
962 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
963
964 /**
965 * qscale offset between ip and b frames.
966 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
967 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
968 * - encoding: set by user.
969 * - decoding: unused
970 */
971 float b_quant_offset;
972
973 /**
974 * error resilience higher values will detect more errors but may missdetect
975 * some more or less valid parts as errors.
976 * - encoding: unused
977 * - decoding: set by user
978 */
979 int error_resilience;
980 #define FF_ER_CAREFULL 1
981 #define FF_ER_COMPLIANT 2
982 #define FF_ER_AGGRESSIVE 3
983 #define FF_ER_VERY_AGGRESSIVE 4
984
985 /**
986 * called at the beginning of each frame to get a buffer for it.
987 * if pic.reference is set then the frame will be read later by lavc
988 * avcodec_align_dimensions() should be used to find the required width and
989 * height, as they normally need to be rounded up to the next multiple of 16
990 * - encoding: unused
991 * - decoding: set by lavc, user can override
992 */
993 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
994
995 /**
996 * called to release buffers which where allocated with get_buffer.
997 * a released buffer can be reused in get_buffer()
998 * pic.data[*] must be set to NULL
999 * - encoding: unused
1000 * - decoding: set by lavc, user can override
1001 */
1002 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1003
1004 /**
1005 * if 1 the stream has a 1 frame delay during decoding.
1006 * - encoding: set by lavc
1007 * - decoding: set by lavc
1008 */
1009 int has_b_frames;
1010
1011 int block_align; ///< used by some WAV based audio codecs
1012
1013 int parse_only; /* - decoding only: if true, only parsing is done
1014 (function avcodec_parse_frame()). The frame
1015 data is returned. Only MPEG codecs support this now. */
1016
1017 /**
1018 * 0-> h263 quant 1-> mpeg quant.
1019 * - encoding: set by user.
1020 * - decoding: unused
1021 */
1022 int mpeg_quant;
1023
1024 /**
1025 * pass1 encoding statistics output buffer.
1026 * - encoding: set by lavc
1027 * - decoding: unused
1028 */
1029 char *stats_out;
1030
1031 /**
1032 * pass2 encoding statistics input buffer.
1033 * concatenated stuff from stats_out of pass1 should be placed here
1034 * - encoding: allocated/set/freed by user
1035 * - decoding: unused
1036 */
1037 char *stats_in;
1038
1039 /**
1040 * ratecontrol qmin qmax limiting method.
1041 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1042 * - encoding: set by user.
1043 * - decoding: unused
1044 */
1045 float rc_qsquish;
1046
1047 float rc_qmod_amp;
1048 int rc_qmod_freq;
1049
1050 /**
1051 * ratecontrol override, see RcOverride.
1052 * - encoding: allocated/set/freed by user.
1053 * - decoding: unused
1054 */
1055 RcOverride *rc_override;
1056 int rc_override_count;
1057
1058 /**
1059 * rate control equation.
1060 * - encoding: set by user
1061 * - decoding: unused
1062 */
1063 char *rc_eq;
1064
1065 /**
1066 * maximum bitrate.
1067 * - encoding: set by user.
1068 * - decoding: unused
1069 */
1070 int rc_max_rate;
1071
1072 /**
1073 * minimum bitrate.
1074 * - encoding: set by user.
1075 * - decoding: unused
1076 */
1077 int rc_min_rate;
1078
1079 /**
1080 * decoder bitstream buffer size.
1081 * - encoding: set by user.
1082 * - decoding: unused
1083 */
1084 int rc_buffer_size;
1085 float rc_buffer_aggressivity;
1086
1087 /**
1088 * qscale factor between p and i frames.
1089 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1090 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1091 * - encoding: set by user.
1092 * - decoding: unused
1093 */
1094 float i_quant_factor;
1095
1096 /**
1097 * qscale offset between p and i frames.
1098 * - encoding: set by user.
1099 * - decoding: unused
1100 */
1101 float i_quant_offset;
1102
1103 /**
1104 * initial complexity for pass1 ratecontrol.
1105 * - encoding: set by user.
1106 * - decoding: unused
1107 */
1108 float rc_initial_cplx;
1109
1110 /**
1111 * dct algorithm, see FF_DCT_* below.
1112 * - encoding: set by user
1113 * - decoding: unused
1114 */
1115 int dct_algo;
1116 #define FF_DCT_AUTO 0
1117 #define FF_DCT_FASTINT 1
1118 #define FF_DCT_INT 2
1119 #define FF_DCT_MMX 3
1120 #define FF_DCT_MLIB 4
1121 #define FF_DCT_ALTIVEC 5
1122 #define FF_DCT_FAAN 6
1123
1124 /**
1125 * luminance masking (0-> disabled).
1126 * - encoding: set by user
1127 * - decoding: unused
1128 */
1129 float lumi_masking;
1130
1131 /**
1132 * temporary complexity masking (0-> disabled).
1133 * - encoding: set by user
1134 * - decoding: unused
1135 */
1136 float temporal_cplx_masking;
1137
1138 /**
1139 * spatial complexity masking (0-> disabled).
1140 * - encoding: set by user
1141 * - decoding: unused
1142 */
1143 float spatial_cplx_masking;
1144
1145 /**
1146 * p block masking (0-> disabled).
1147 * - encoding: set by user
1148 * - decoding: unused
1149 */
1150 float p_masking;
1151
1152 /**
1153 * darkness masking (0-> disabled).
1154 * - encoding: set by user
1155 * - decoding: unused
1156 */
1157 float dark_masking;
1158
1159
1160 /* for binary compatibility */
1161 int unused;
1162
1163 /**
1164 * idct algorithm, see FF_IDCT_* below.
1165 * - encoding: set by user
1166 * - decoding: set by user
1167 */
1168 int idct_algo;
1169 #define FF_IDCT_AUTO 0
1170 #define FF_IDCT_INT 1
1171 #define FF_IDCT_SIMPLE 2
1172 #define FF_IDCT_SIMPLEMMX 3
1173 #define FF_IDCT_LIBMPEG2MMX 4
1174 #define FF_IDCT_PS2 5
1175 #define FF_IDCT_MLIB 6
1176 #define FF_IDCT_ARM 7
1177 #define FF_IDCT_ALTIVEC 8
1178 #define FF_IDCT_SH4 9
1179 #define FF_IDCT_SIMPLEARM 10
1180 #define FF_IDCT_H264 11
1181 #define FF_IDCT_VP3 12
1182
1183 /**
1184 * slice count.
1185 * - encoding: set by lavc
1186 * - decoding: set by user (or 0)
1187 */
1188 int slice_count;
1189 /**
1190 * slice offsets in the frame in bytes.
1191 * - encoding: set/allocated by lavc
1192 * - decoding: set/allocated by user (or NULL)
1193 */
1194 int *slice_offset;
1195
1196 /**
1197 * error concealment flags.
1198 * - encoding: unused
1199 * - decoding: set by user
1200 */
1201 int error_concealment;
1202 #define FF_EC_GUESS_MVS 1
1203 #define FF_EC_DEBLOCK 2
1204
1205 /**
1206 * dsp_mask could be add used to disable unwanted CPU features
1207 * CPU features (i.e. MMX, SSE. ...)
1208 *
1209 * with FORCE flag you may instead enable given CPU features
1210 * (Dangerous: usable in case of misdetection, improper usage however will
1211 * result into program crash)
1212 */
1213 unsigned dsp_mask;
1214 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1215 /* lower 16 bits - CPU features */
1216 #ifdef HAVE_MMX
1217 #define FF_MM_MMX 0x0001 /* standard MMX */
1218 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1219 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1220 #define FF_MM_SSE 0x0008 /* SSE functions */
1221 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1222 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1223 #endif /* HAVE_MMX */
1224
1225 /**
1226 * bits per sample/pixel from the demuxer (needed for huffyuv).
1227 * - encoding: set by lavc
1228 * - decoding: set by user
1229 */
1230 int bits_per_sample;
1231
1232 /**
1233 * prediction method (needed for huffyuv).
1234 * - encoding: set by user
1235 * - decoding: unused
1236 */
1237 int prediction_method;
1238 #define FF_PRED_LEFT 0
1239 #define FF_PRED_PLANE 1
1240 #define FF_PRED_MEDIAN 2
1241
1242 /**
1243 * sample aspect ratio (0 if unknown).
1244 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1245 * - encoding: set by user.
1246 * - decoding: set by lavc.
1247 */
1248 AVRational sample_aspect_ratio;
1249
1250 /**
1251 * the picture in the bitstream.
1252 * - encoding: set by lavc
1253 * - decoding: set by lavc
1254 */
1255 AVFrame *coded_frame;
1256
1257 /**
1258 * debug.
1259 * - encoding: set by user.
1260 * - decoding: set by user.
1261 */
1262 int debug;
1263 #define FF_DEBUG_PICT_INFO 1
1264 #define FF_DEBUG_RC 2
1265 #define FF_DEBUG_BITSTREAM 4
1266 #define FF_DEBUG_MB_TYPE 8
1267 #define FF_DEBUG_QP 16
1268 #define FF_DEBUG_MV 32
1269 #define FF_DEBUG_DCT_COEFF 0x00000040
1270 #define FF_DEBUG_SKIP 0x00000080
1271 #define FF_DEBUG_STARTCODE 0x00000100
1272 #define FF_DEBUG_PTS 0x00000200
1273 #define FF_DEBUG_ER 0x00000400
1274 #define FF_DEBUG_MMCO 0x00000800
1275 #define FF_DEBUG_BUGS 0x00001000
1276 #define FF_DEBUG_VIS_QP 0x00002000
1277 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1278
1279 /**
1280 * debug.
1281 * - encoding: set by user.
1282 * - decoding: set by user.
1283 */
1284 int debug_mv;
1285 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1286 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1287 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1288
1289 /**
1290 * error.
1291 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1292 * - decoding: unused
1293 */
1294 uint64_t error[4];
1295
1296 /**
1297 * minimum MB quantizer.
1298 * - encoding: unused
1299 * - decoding: unused
1300 */
1301 int mb_qmin;
1302
1303 /**
1304 * maximum MB quantizer.
1305 * - encoding: unused
1306 * - decoding: unused
1307 */
1308 int mb_qmax;
1309
1310 /**
1311 * motion estimation compare function.
1312 * - encoding: set by user.
1313 * - decoding: unused
1314 */
1315 int me_cmp;
1316 /**
1317 * subpixel motion estimation compare function.
1318 * - encoding: set by user.
1319 * - decoding: unused
1320 */
1321 int me_sub_cmp;
1322 /**
1323 * macroblock compare function (not supported yet).
1324 * - encoding: set by user.
1325 * - decoding: unused
1326 */
1327 int mb_cmp;
1328 /**
1329 * interlaced dct compare function
1330 * - encoding: set by user.
1331 * - decoding: unused
1332 */
1333 int ildct_cmp;
1334 #define FF_CMP_SAD 0
1335 #define FF_CMP_SSE 1
1336 #define FF_CMP_SATD 2
1337 #define FF_CMP_DCT 3
1338 #define FF_CMP_PSNR 4
1339 #define FF_CMP_BIT 5
1340 #define FF_CMP_RD 6
1341 #define FF_CMP_ZERO 7
1342 #define FF_CMP_VSAD 8
1343 #define FF_CMP_VSSE 9
1344 #define FF_CMP_NSSE 10
1345 #define FF_CMP_W53 11
1346 #define FF_CMP_W97 12
1347 #define FF_CMP_DCTMAX 13
1348 #define FF_CMP_CHROMA 256
1349
1350 /**
1351 * ME diamond size & shape.
1352 * - encoding: set by user.
1353 * - decoding: unused
1354 */
1355 int dia_size;
1356
1357 /**
1358 * amount of previous MV predictors (2a+1 x 2a+1 square).
1359 * - encoding: set by user.
1360 * - decoding: unused
1361 */
1362 int last_predictor_count;
1363
1364 /**
1365 * pre pass for motion estimation.
1366 * - encoding: set by user.
1367 * - decoding: unused
1368 */
1369 int pre_me;
1370
1371 /**
1372 * motion estimation pre pass compare function.
1373 * - encoding: set by user.
1374 * - decoding: unused
1375 */
1376 int me_pre_cmp;
1377
1378 /**
1379 * ME pre pass diamond size & shape.
1380 * - encoding: set by user.
1381 * - decoding: unused
1382 */
1383 int pre_dia_size;
1384
1385 /**
1386 * subpel ME quality.
1387 * - encoding: set by user.
1388 * - decoding: unused
1389 */
1390 int me_subpel_quality;
1391
1392 /**
1393 * callback to negotiate the pixelFormat.
1394 * @param fmt is the list of formats which are supported by the codec,
1395 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1396 * the first is allways the native one
1397 * @return the choosen format
1398 * - encoding: unused
1399 * - decoding: set by user, if not set then the native format will always be choosen
1400 */
1401 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1402
1403 /**
1404 * DTG active format information (additionnal aspect ratio
1405 * information only used in DVB MPEG2 transport streams). 0 if
1406 * not set.
1407 *
1408 * - encoding: unused.
1409 * - decoding: set by decoder
1410 */
1411 int dtg_active_format;
1412 #define FF_DTG_AFD_SAME 8
1413 #define FF_DTG_AFD_4_3 9
1414 #define FF_DTG_AFD_16_9 10
1415 #define FF_DTG_AFD_14_9 11
1416 #define FF_DTG_AFD_4_3_SP_14_9 13
1417 #define FF_DTG_AFD_16_9_SP_14_9 14
1418 #define FF_DTG_AFD_SP_4_3 15
1419
1420 /**
1421 * Maximum motion estimation search range in subpel units.
1422 * if 0 then no limit
1423 *
1424 * - encoding: set by user.
1425 * - decoding: unused.
1426 */
1427 int me_range;
1428
1429 /**
1430 * intra quantizer bias.
1431 * - encoding: set by user.
1432 * - decoding: unused
1433 */
1434 int intra_quant_bias;
1435 #define FF_DEFAULT_QUANT_BIAS 999999
1436
1437 /**
1438 * inter quantizer bias.
1439 * - encoding: set by user.
1440 * - decoding: unused
1441 */
1442 int inter_quant_bias;
1443
1444 /**
1445 * color table ID.
1446 * - encoding: unused.
1447 * - decoding: which clrtable should be used for 8bit RGB images
1448 * table have to be stored somewhere FIXME
1449 */
1450 int color_table_id;
1451
1452 /**
1453 * internal_buffer count.
1454 * Dont touch, used by lavc default_get_buffer()
1455 */
1456 int internal_buffer_count;
1457
1458 /**
1459 * internal_buffers.
1460 * Dont touch, used by lavc default_get_buffer()
1461 */
1462 void *internal_buffer;
1463
1464 #define FF_LAMBDA_SHIFT 7
1465 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1466 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1467 #define FF_LAMBDA_MAX (256*128-1)
1468
1469 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1470 /**
1471 * global quality for codecs which cannot change it per frame.
1472 * this should be proportional to MPEG1/2/4 qscale.
1473 * - encoding: set by user.
1474 * - decoding: unused
1475 */
1476 int global_quality;
1477
1478 #define FF_CODER_TYPE_VLC 0
1479 #define FF_CODER_TYPE_AC 1
1480 /**
1481 * coder type
1482 * - encoding: set by user.
1483 * - decoding: unused
1484 */
1485 int coder_type;
1486
1487 /**
1488 * context model
1489 * - encoding: set by user.
1490 * - decoding: unused
1491 */
1492 int context_model;
1493
1494 /**
1495 * slice flags
1496 * - encoding: unused
1497 * - decoding: set by user.
1498 */
1499 int slice_flags;
1500 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1501 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1502 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1503
1504 /**
1505 * XVideo Motion Acceleration
1506 * - encoding: forbidden
1507 * - decoding: set by decoder
1508 */
1509 int xvmc_acceleration;
1510
1511 /**
1512 * macroblock decision mode
1513 * - encoding: set by user.
1514 * - decoding: unused
1515 */
1516 int mb_decision;
1517 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1518 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1519 #define FF_MB_DECISION_RD 2 ///< rate distoration
1520
1521 /**
1522 * custom intra quantization matrix
1523 * - encoding: set by user, can be NULL
1524 * - decoding: set by lavc
1525 */
1526 uint16_t *intra_matrix;
1527
1528 /**
1529 * custom inter quantization matrix
1530 * - encoding: set by user, can be NULL
1531 * - decoding: set by lavc
1532 */
1533 uint16_t *inter_matrix;
1534
1535 /**
1536 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1537 * this is used to workaround some encoder bugs
1538 * - encoding: unused
1539 * - decoding: set by user, will be converted to upper case by lavc during init
1540 */
1541 unsigned int stream_codec_tag;
1542
1543 /**
1544 * scene change detection threshold.
1545 * 0 is default, larger means fewer detected scene changes
1546 * - encoding: set by user.
1547 * - decoding: unused
1548 */
1549 int scenechange_threshold;
1550
1551 /**
1552 * minimum lagrange multipler
1553 * - encoding: set by user.
1554 * - decoding: unused
1555 */
1556 int lmin;
1557
1558 /**
1559 * maximum lagrange multipler
1560 * - encoding: set by user.
1561 * - decoding: unused
1562 */
1563 int lmax;
1564
1565 /**
1566 * Palette control structure
1567 * - encoding: ??? (no palette-enabled encoder yet)
1568 * - decoding: set by user.
1569 */
1570 struct AVPaletteControl *palctrl;
1571
1572 /**
1573 * noise reduction strength
1574 * - encoding: set by user.
1575 * - decoding: unused
1576 */
1577 int noise_reduction;
1578
1579 /**
1580 * called at the beginning of a frame to get cr buffer for it.
1581 * buffer type (size, hints) must be the same. lavc won't check it.
1582 * lavc will pass previous buffer in pic, function should return
1583 * same buffer or new buffer with old frame "painted" into it.
1584 * if pic.data[0] == NULL must behave like get_buffer().
1585 * - encoding: unused
1586 * - decoding: set by lavc, user can override
1587 */
1588 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1589
1590 /**
1591 * number of bits which should be loaded into the rc buffer before decoding starts
1592 * - encoding: set by user.
1593 * - decoding: unused
1594 */
1595 int rc_initial_buffer_occupancy;
1596
1597 /**
1598 *
1599 * - encoding: set by user.
1600 * - decoding: unused
1601 */
1602 int inter_threshold;
1603
1604 /**
1605 * CODEC_FLAG2_*.
1606 * - encoding: set by user.
1607 * - decoding: set by user.
1608 */
1609 int flags2;
1610
1611 /**
1612 * simulates errors in the bitstream to test error concealment.
1613 * - encoding: set by user.
1614 * - decoding: unused.
1615 */
1616 int error_rate;
1617
1618 /**
1619 * MP3 antialias algorithm, see FF_AA_* below.
1620 * - encoding: unused
1621 * - decoding: set by user
1622 */
1623 int antialias_algo;
1624 #define FF_AA_AUTO 0
1625 #define FF_AA_FASTINT 1 //not implemented yet
1626 #define FF_AA_INT 2
1627 #define FF_AA_FLOAT 3
1628 /**
1629 * Quantizer noise shaping.
1630 * - encoding: set by user
1631 * - decoding: unused
1632 */
1633 int quantizer_noise_shaping;
1634
1635 /**
1636 * Thread count.
1637 * is used to decide how many independant tasks should be passed to execute()
1638 * - encoding: set by user
1639 * - decoding: set by user
1640 */
1641 int thread_count;
1642
1643 /**
1644 * the codec may call this to execute several independant things. it will return only after
1645 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1646 * default implementation will execute the parts serially
1647 * @param count the number of things to execute
1648 * - encoding: set by lavc, user can override
1649 * - decoding: set by lavc, user can override
1650 */
1651 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1652
1653 /**
1654 * Thread opaque.
1655 * can be used by execute() to store some per AVCodecContext stuff.
1656 * - encoding: set by execute()
1657 * - decoding: set by execute()
1658 */
1659 void *thread_opaque;
1660
1661 /**
1662 * Motion estimation threshold. under which no motion estimation is
1663 * performed, but instead the user specified motion vectors are used
1664 *
1665 * - encoding: set by user
1666 * - decoding: unused
1667 */
1668 int me_threshold;
1669
1670 /**
1671 * Macroblock threshold. under which the user specified macroblock types will be used
1672 * - encoding: set by user
1673 * - decoding: unused
1674 */
1675 int mb_threshold;
1676
1677 /**
1678 * precision of the intra dc coefficient - 8.
1679 * - encoding: set by user
1680 * - decoding: unused
1681 */
1682 int intra_dc_precision;
1683
1684 /**
1685 * noise vs. sse weight for the nsse comparsion function.
1686 * - encoding: set by user
1687 * - decoding: unused
1688 */
1689 int nsse_weight;
1690
1691 /**
1692 * number of macroblock rows at the top which are skipped.
1693 * - encoding: unused
1694 * - decoding: set by user
1695 */
1696 int skip_top;
1697
1698 /**
1699 * number of macroblock rows at the bottom which are skipped.
1700 * - encoding: unused
1701 * - decoding: set by user
1702 */
1703 int skip_bottom;
1704
1705 /**
1706 * profile
1707 * - encoding: set by user
1708 * - decoding: set by lavc
1709 */
1710 int profile;
1711 #define FF_PROFILE_UNKNOWN -99
1712
1713 /**
1714 * level
1715 * - encoding: set by user
1716 * - decoding: set by lavc
1717 */
1718 int level;
1719 #define FF_LEVEL_UNKNOWN -99
1720
1721 /**
1722 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1723 * - encoding: unused
1724 * - decoding: set by user
1725 */
1726 int lowres;
1727
1728 /**
1729 * bitsream width / height. may be different from width/height if lowres
1730 * or other things are used
1731 * - encoding: unused
1732 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1733 */
1734 int coded_width, coded_height;
1735
1736 /**
1737 * frame skip threshold
1738 * - encoding: set by user
1739 * - decoding: unused
1740 */
1741 int frame_skip_threshold;
1742
1743 /**
1744 * frame skip factor
1745 * - encoding: set by user
1746 * - decoding: unused
1747 */
1748 int frame_skip_factor;
1749
1750 /**
1751 * frame skip exponent
1752 * - encoding: set by user
1753 * - decoding: unused
1754 */
1755 int frame_skip_exp;
1756
1757 /**
1758 * frame skip comparission function
1759 * - encoding: set by user.
1760 * - decoding: unused
1761 */
1762 int frame_skip_cmp;
1763
1764 /**
1765 * border processing masking. raises the quantizer for mbs on the borders
1766 * of the picture.
1767 * - encoding: set by user
1768 * - decoding: unused
1769 */
1770 float border_masking;
1771
1772 /**
1773 * minimum MB lagrange multipler.
1774 * - encoding: set by user.
1775 * - decoding: unused
1776 */
1777 int mb_lmin;
1778
1779 /**
1780 * maximum MB lagrange multipler.
1781 * - encoding: set by user.
1782 * - decoding: unused
1783 */
1784 int mb_lmax;
1785
1786 /**
1787 *
1788 * - encoding: set by user.
1789 * - decoding: unused
1790 */
1791 int me_penalty_compensation;
1792 } AVCodecContext;
1793
1794
1795 /**
1796 * AVOption.
1797 */
1798 typedef struct AVOption {
1799 /** options' name */
1800 const char *name; /* if name is NULL, it indicates a link to next */
1801 /** short English text help or const struct AVOption* subpointer */
1802 const char *help; // const struct AVOption* sub;
1803 /** offset to context structure where the parsed value should be stored */
1804 int offset;
1805 /** options' type */
1806 int type;
1807 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1808 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1809 #define FF_OPT_TYPE_INT 3 ///< integer
1810 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1811 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1812 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1813 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1814 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1815 /** min value (min == max -> no limits) */
1816 double min;
1817 /** maximum value for double/int */
1818 double max;
1819 /** default boo [0,1]l/double/int value */
1820 double defval;
1821 /**
1822 * default string value (with optional semicolon delimited extra option-list
1823 * i.e. option1;option2;option3
1824 * defval might select other then first argument as default
1825 */
1826 const char *defstr;
1827 #define FF_OPT_MAX_DEPTH 10
1828 } AVOption;
1829
1830 /**
1831 * AVCodec.
1832 */
1833 typedef struct AVCodec {
1834 const char *name;
1835 enum CodecType type;
1836 enum CodecID id;
1837 int priv_data_size;
1838 int (*init)(AVCodecContext *);
1839 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1840 int (*close)(AVCodecContext *);
1841 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1842 uint8_t *buf, int buf_size);
1843 int capabilities;
1844 void *dummy; // FIXME remove next time we break binary compatibility
1845 struct AVCodec *next;
1846 void (*flush)(AVCodecContext *);
1847 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
1848 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
1849 } AVCodec;
1850
1851 /**
1852 * four components are given, that's all.
1853 * the last component is alpha
1854 */
1855 typedef struct AVPicture {
1856 uint8_t *data[4];
1857 int linesize[4]; ///< number of bytes per line
1858 } AVPicture;
1859
1860 /**
1861 * AVPaletteControl
1862 * This structure defines a method for communicating palette changes
1863 * between and demuxer and a decoder.
1864 */
1865 #define AVPALETTE_SIZE 1024
1866 #define AVPALETTE_COUNT 256
1867 typedef struct AVPaletteControl {
1868
1869 /* demuxer sets this to 1 to indicate the palette has changed;
1870 * decoder resets to 0 */
1871 int palette_changed;
1872
1873 /* 4-byte ARGB palette entries, stored in native byte order; note that
1874 * the individual palette components should be on a 8-bit scale; if
1875 * the palette data comes from a IBM VGA native format, the component
1876 * data is probably 6 bits in size and needs to be scaled */
1877 unsigned int palette[AVPALETTE_COUNT];
1878
1879 } AVPaletteControl;
1880
1881 extern AVCodec ac3_encoder;
1882 extern AVCodec mp2_encoder;
1883 extern AVCodec mp3lame_encoder;
1884 extern AVCodec oggvorbis_encoder;
1885 extern AVCodec oggtheora_encoder;
1886 extern AVCodec faac_encoder;
1887 extern AVCodec xvid_encoder;
1888 extern AVCodec mpeg1video_encoder;
1889 extern AVCodec mpeg2video_encoder;
1890 extern AVCodec h261_encoder;
1891 extern AVCodec h263_encoder;
1892 extern AVCodec h263p_encoder;
1893 extern AVCodec flv_encoder;
1894 extern AVCodec rv10_encoder;
1895 extern AVCodec rv20_encoder;
1896 extern AVCodec dvvideo_encoder;
1897 extern AVCodec mjpeg_encoder;
1898 extern AVCodec ljpeg_encoder;
1899 extern AVCodec png_encoder;
1900 extern AVCodec ppm_encoder;
1901 extern AVCodec pgm_encoder;
1902 extern AVCodec pgmyuv_encoder;
1903 extern AVCodec pbm_encoder;
1904 extern AVCodec pam_encoder;
1905 extern AVCodec mpeg4_encoder;
1906 extern AVCodec msmpeg4v1_encoder;
1907 extern AVCodec msmpeg4v2_encoder;
1908 extern AVCodec msmpeg4v3_encoder;
1909 extern AVCodec wmv1_encoder;
1910 extern AVCodec wmv2_encoder;
1911 extern AVCodec huffyuv_encoder;
1912 extern AVCodec ffvhuff_encoder;
1913 extern AVCodec h264_encoder;
1914 extern AVCodec asv1_encoder;
1915 extern AVCodec asv2_encoder;
1916 extern AVCodec vcr1_encoder;
1917 extern AVCodec ffv1_encoder;
1918 extern AVCodec snow_encoder;
1919 extern AVCodec mdec_encoder;
1920 extern AVCodec zlib_encoder;
1921 extern AVCodec sonic_encoder;
1922 extern AVCodec sonic_ls_encoder;
1923 extern AVCodec svq1_encoder;
1924 extern AVCodec x264_encoder;
1925
1926 extern AVCodec h263_decoder;
1927 extern AVCodec h261_decoder;
1928 extern AVCodec mpeg4_decoder;
1929 extern AVCodec msmpeg4v1_decoder;
1930 extern AVCodec msmpeg4v2_decoder;
1931 extern AVCodec msmpeg4v3_decoder;
1932 extern AVCodec wmv1_decoder;
1933 extern AVCodec wmv2_decoder;
1934 extern AVCodec vc9_decoder;
1935 extern AVCodec wmv3_decoder;
1936 extern AVCodec mpeg1video_decoder;
1937 extern AVCodec mpeg2video_decoder;
1938 extern AVCodec mpegvideo_decoder;
1939 extern AVCodec mpeg_xvmc_decoder;
1940 extern AVCodec h263i_decoder;
1941 extern AVCodec flv_decoder;
1942 extern AVCodec rv10_decoder;
1943 extern AVCodec rv20_decoder;
1944 extern AVCodec rv30_decoder;
1945 extern AVCodec rv40_decoder;
1946 extern AVCodec svq1_decoder;
1947 extern AVCodec svq3_decoder;
1948 extern AVCodec dvvideo_decoder;
1949 extern AVCodec wmav1_decoder;
1950 extern AVCodec wmav2_decoder;
1951 extern AVCodec mjpeg_decoder;
1952 extern AVCodec mjpegb_decoder;
1953 extern AVCodec sp5x_decoder;
1954 extern AVCodec png_decoder;
1955 extern AVCodec mp2_decoder;
1956 extern AVCodec mp3_decoder;
1957 extern AVCodec mp3adu_decoder;
1958 extern AVCodec mp3on4_decoder;
1959 extern AVCodec mace3_decoder;
1960 extern AVCodec mace6_decoder;
1961 extern AVCodec huffyuv_decoder;
1962 extern AVCodec ffvhuff_decoder;
1963 extern AVCodec oggvorbis_decoder;
1964 extern AVCodec oggtheora_decoder;
1965 extern AVCodec cyuv_decoder;
1966 extern AVCodec h264_decoder;
1967 extern AVCodec indeo3_decoder;
1968 extern AVCodec vp3_decoder;
1969 extern AVCodec theora_decoder;
1970 extern AVCodec amr_nb_decoder;
1971 extern AVCodec amr_nb_encoder;
1972 extern AVCodec amr_wb_encoder;
1973 extern AVCodec amr_wb_decoder;
1974 extern AVCodec aac_decoder;
1975 extern AVCodec mpeg4aac_decoder;
1976 extern AVCodec asv1_decoder;
1977 extern AVCodec asv2_decoder;
1978 extern AVCodec vcr1_decoder;
1979 extern AVCodec cljr_decoder;
1980 extern AVCodec ffv1_decoder;
1981 extern AVCodec snow_decoder;
1982 extern AVCodec fourxm_decoder;
1983 extern AVCodec mdec_decoder;
1984 extern AVCodec roq_decoder;
1985 extern AVCodec interplay_video_decoder;
1986 extern AVCodec xan_wc3_decoder;
1987 extern AVCodec rpza_decoder;
1988 extern AVCodec cinepak_decoder;
1989 extern AVCodec msrle_decoder;
1990 extern AVCodec msvideo1_decoder;
1991 extern AVCodec vqa_decoder;
1992 extern AVCodec idcin_decoder;
1993 extern AVCodec eightbps_decoder;
1994 extern AVCodec smc_decoder;
1995 extern AVCodec flic_decoder;
1996 extern AVCodec vmdvideo_decoder;
1997 extern AVCodec vmdaudio_decoder;
1998 extern AVCodec truemotion1_decoder;
1999 extern AVCodec mszh_decoder;
2000 extern AVCodec zlib_decoder;
2001 extern AVCodec ra_144_decoder;
2002 extern AVCodec ra_288_decoder;
2003 extern AVCodec roq_dpcm_decoder;
2004 extern AVCodec interplay_dpcm_decoder;
2005 extern AVCodec xan_dpcm_decoder;
2006 extern AVCodec sol_dpcm_decoder;
2007 extern AVCodec sonic_decoder;
2008 extern AVCodec qtrle_decoder;
2009 extern AVCodec flac_decoder;
2010 extern AVCodec tscc_decoder;
2011 extern AVCodec ulti_decoder;
2012 extern AVCodec qdraw_decoder;
2013 extern AVCodec xl_decoder;
2014 extern AVCodec qpeg_decoder;
2015 extern AVCodec shorten_decoder;
2016 extern AVCodec loco_decoder;
2017 extern AVCodec wnv1_decoder;
2018 extern AVCodec aasc_decoder;
2019 extern AVCodec alac_decoder;
2020 extern AVCodec ws_snd1_decoder;
2021 extern AVCodec indeo2_decoder;
2022 extern AVCodec vorbis_decoder;
2023 extern AVCodec fraps_decoder;
2024
2025 /* pcm codecs */
2026 #define PCM_CODEC(id, name) \
2027 extern AVCodec name ## _decoder; \
2028 extern AVCodec name ## _encoder
2029
2030 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2031 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2032 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2033 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2034 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2035 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2036 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2037 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2038
2039 /* adpcm codecs */
2040
2041 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2042 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2043 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2044 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2045 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2046 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2047 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2048 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2049 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2050 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2051 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2052 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2053 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2054 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2055
2056 #undef PCM_CODEC
2057
2058 /* dummy raw video codec */
2059 extern AVCodec rawvideo_encoder;
2060 extern AVCodec rawvideo_decoder;
2061
2062 /* the following codecs use external GPL libs */
2063 extern AVCodec ac3_decoder;
2064 extern AVCodec dts_decoder;
2065
2066 /* resample.c */
2067
2068 struct ReSampleContext;
2069 struct AVResampleContext;
2070
2071 typedef struct ReSampleContext ReSampleContext;
2072
2073 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2074 int output_rate, int input_rate);
2075 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2076 void audio_resample_close(ReSampleContext *s);
2077
2078 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2079 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2080 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2081 void av_resample_close(struct AVResampleContext *c);
2082
2083 /* YUV420 format is assumed ! */
2084
2085 struct ImgReSampleContext;
2086
2087 typedef struct ImgReSampleContext ImgReSampleContext;
2088
2089 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2090 int input_width, int input_height);
2091
2092 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2093 int iwidth, int iheight,
2094 int topBand, int bottomBand,
2095 int leftBand, int rightBand,
2096 int padtop, int padbottom,
2097 int padleft, int padright);
2098
2099
2100 void img_resample(ImgReSampleContext *s,
2101 AVPicture *output, const AVPicture *input);
2102
2103 void img_resample_close(ImgReSampleContext *s);
2104
2105 /**
2106 * Allocate memory for a picture. Call avpicture_free to free it.
2107 *
2108 * @param picture the picture to be filled in.
2109 * @param pix_fmt the format of the picture.
2110 * @param width the width of the picture.
2111 * @param height the height of the picture.
2112 * @return 0 if successful, -1 if not.
2113 */
2114 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2115
2116 /* Free a picture previously allocated by avpicture_alloc. */
2117 void avpicture_free(AVPicture *picture);
2118
2119 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2120 int pix_fmt, int width, int height);
2121 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2122 unsigned char *dest, int dest_size);
2123 int avpicture_get_size(int pix_fmt, int width, int height);
2124 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2125 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2126 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2127 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2128 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2129
2130 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2131 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2132 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2133 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2134 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2135 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2136
2137 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2138 int has_alpha);
2139 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2140 int has_alpha, int *loss_ptr);
2141
2142 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2143 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2144 int img_get_alpha_info(const AVPicture *src,
2145 int pix_fmt, int width, int height);
2146
2147 /* convert among pixel formats */
2148 int img_convert(AVPicture *dst, int dst_pix_fmt,
2149 const AVPicture *src, int pix_fmt,
2150 int width, int height);
2151
2152 /* deinterlace a picture */
2153 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2154 int pix_fmt, int width, int height);
2155
2156 /* external high level API */
2157
2158 extern AVCodec *first_avcodec;
2159
2160 /* returns LIBAVCODEC_VERSION_INT constant */
2161 unsigned avcodec_version(void);
2162 /* returns LIBAVCODEC_BUILD constant */
2163 unsigned avcodec_build(void);
2164 void avcodec_init(void);
2165
2166 void register_avcodec(AVCodec *format);
2167 AVCodec *avcodec_find_encoder(enum CodecID id);
2168 AVCodec *avcodec_find_encoder_by_name(const char *name);
2169 AVCodec *avcodec_find_decoder(enum CodecID id);
2170 AVCodec *avcodec_find_decoder_by_name(const char *name);
2171 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2172
2173 void avcodec_get_context_defaults(AVCodecContext *s);
2174 AVCodecContext *avcodec_alloc_context(void);
2175 void avcodec_get_frame_defaults(AVFrame *pic);
2176 AVFrame *avcodec_alloc_frame(void);
2177
2178 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2179 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2180 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2181 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2182 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2183 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2184
2185 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2186 void avcodec_thread_free(AVCodecContext *s);
2187 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2188 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2189 //FIXME func typedef
2190
2191 /**
2192 * opens / inits the AVCodecContext.
2193 * not thread save!
2194 */
2195 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2196
2197 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2198 int *frame_size_ptr,
2199 uint8_t *buf, int buf_size);
2200 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2201 int *got_picture_ptr,
2202 uint8_t *buf, int buf_size);
2203 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2204 int *data_size_ptr,
2205 uint8_t *buf, int buf_size);
2206 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2207 const short *samples);
2208 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2209 const AVFrame *pict);
2210
2211 int avcodec_close(AVCodecContext *avctx);
2212
2213 void avcodec_register_all(void);
2214
2215 void avcodec_flush_buffers(AVCodecContext *avctx);
2216
2217 void avcodec_default_free_buffers(AVCodecContext *s);
2218
2219 /* misc usefull functions */
2220
2221 /**
2222 * returns a single letter to describe the picture type
2223 */
2224 char av_get_pict_type_char(int pict_type);
2225
2226 /**
2227 * reduce a fraction.
2228 * this is usefull for framerate calculations
2229 * @param max the maximum allowed for dst_nom & dst_den
2230 * @return 1 if exact, 0 otherwise
2231 */
2232 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
2233
2234 /**
2235 * rescale a 64bit integer with rounding to nearest.
2236 * a simple a*b/c isnt possible as it can overflow
2237 */
2238 int64_t av_rescale(int64_t a, int64_t b, int64_t c);
2239
2240 /**
2241 * rescale a 64bit integer with specified rounding.
2242 * a simple a*b/c isnt possible as it can overflow
2243 */
2244 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding);
2245
2246 /**
2247 * rescale a 64bit integer by 2 rational numbers.
2248 */
2249 int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq);
2250
2251 /* frame parsing */
2252 typedef struct AVCodecParserContext {
2253 void *priv_data;
2254 struct AVCodecParser *parser;
2255 int64_t frame_offset; /* offset of the current frame */
2256 int64_t cur_offset; /* current offset
2257 (incremented by each av_parser_parse()) */
2258 int64_t last_frame_offset; /* offset of the last frame */
2259 /* video info */
2260 int pict_type; /* XXX: put it back in AVCodecContext */
2261 int repeat_pict; /* XXX: put it back in AVCodecContext */
2262 int64_t pts; /* pts of the current frame */
2263 int64_t dts; /* dts of the current frame */
2264
2265 /* private data */
2266 int64_t last_pts;
2267 int64_t last_dts;
2268 int fetch_timestamp;
2269
2270 #define AV_PARSER_PTS_NB 4
2271 int cur_frame_start_index;
2272 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2273 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2274 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2275 } AVCodecParserContext;
2276
2277 typedef struct AVCodecParser {
2278 int codec_ids[5]; /* several codec IDs are permitted */
2279 int priv_data_size;
2280 int (*parser_init)(AVCodecParserContext *s);
2281 int (*parser_parse)(AVCodecParserContext *s,
2282 AVCodecContext *avctx,
2283 uint8_t **poutbuf, int *poutbuf_size,
2284 const uint8_t *buf, int buf_size);
2285 void (*parser_close)(AVCodecParserContext *s);
2286 struct AVCodecParser *next;
2287 } AVCodecParser;
2288
2289 extern AVCodecParser *av_first_parser;
2290
2291 void av_register_codec_parser(AVCodecParser *parser);
2292 AVCodecParserContext *av_parser_init(int codec_id);
2293 int av_parser_parse(AVCodecParserContext *s,
2294 AVCodecContext *avctx,
2295 uint8_t **poutbuf, int *poutbuf_size,
2296 const uint8_t *buf, int buf_size,
2297 int64_t pts, int64_t dts);
2298 void av_parser_close(AVCodecParserContext *s);
2299
2300 extern AVCodecParser mpegvideo_parser;
2301 extern AVCodecParser mpeg4video_parser;
2302 extern AVCodecParser h261_parser;
2303 extern AVCodecParser h263_parser;
2304 extern AVCodecParser h264_parser;
2305 extern AVCodecParser mjpeg_parser;
2306 extern AVCodecParser pnm_parser;
2307 extern AVCodecParser mpegaudio_parser;
2308 extern AVCodecParser ac3_parser;
2309
2310 /* memory */
2311 void *av_malloc(unsigned int size);
2312 void *av_mallocz(unsigned int size);
2313 void *av_realloc(void *ptr, unsigned int size);
2314 void av_free(void *ptr);
2315 char *av_strdup(const char *s);
2316 void av_freep(void *ptr);
2317 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2318 /* for static data only */
2319 /* call av_free_static to release all staticaly allocated tables */
2320 void av_free_static(void);
2321 void *av_mallocz_static(unsigned int size);
2322 void *av_realloc_static(void *ptr, unsigned int size);
2323
2324 /* add by bero : in adx.c */
2325 int is_adx(const unsigned char *buf,size_t bufsize);
2326
2327 void img_copy(AVPicture *dst, const AVPicture *src,
2328 int pix_fmt, int width, int height);
2329
2330 /* av_log API */
2331
2332 #include <stdarg.h>
2333
2334 #define AV_LOG_QUIET -1
2335 #define AV_LOG_ERROR 0
2336 #define AV_LOG_INFO 1
2337 #define AV_LOG_DEBUG 2
2338
2339 #ifdef __GNUC__
2340 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2341 #else
2342 extern void av_log(void*, int level, const char *fmt, ...);
2343 #endif
2344
2345 extern void av_vlog(void*, int level, const char *fmt, va_list);
2346 extern int av_log_get_level(void);
2347 extern void av_log_set_level(int);
2348 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2349
2350 /* endian macros */
2351 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2352 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2353 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2354 (((uint8_t*)(x))[1] << 16) | \
2355 (((uint8_t*)(x))[2] << 8) | \
2356 ((uint8_t*)(x))[3])
2357 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2358 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2359 (((uint8_t*)(x))[2] << 16) | \
2360 (((uint8_t*)(x))[1] << 8) | \
2361 ((uint8_t*)(x))[0])
2362 #endif
2363
2364 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2365
2366 #ifdef __cplusplus
2367 }
2368 #endif
2369
2370 #endif /* AVCODEC_H */