Increase maximum number of B-frames, necessary for H.264 encoding.
[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 "avutil.h"
15 #include <sys/types.h> /* size_t */
16
17 //FIXME the following 2 really dont belong in here
18 #define FFMPEG_VERSION_INT 0x000409
19 #define FFMPEG_VERSION "CVS"
20
21 #define AV_STRINGIFY(s) AV_TOSTRING(s)
22 #define AV_TOSTRING(s) #s
23
24 #define LIBAVCODEC_VERSION_INT ((51<<16)+(7<<8)+0)
25 #define LIBAVCODEC_VERSION 51.7.0
26 #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
27
28 #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
29
30 #define AV_NOPTS_VALUE int64_t_C(0x8000000000000000)
31 #define AV_TIME_BASE 1000000
32 #define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
33
34 enum CodecID {
35 CODEC_ID_NONE,
36 CODEC_ID_MPEG1VIDEO,
37 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
38 CODEC_ID_MPEG2VIDEO_XVMC,
39 CODEC_ID_H261,
40 CODEC_ID_H263,
41 CODEC_ID_RV10,
42 CODEC_ID_RV20,
43 CODEC_ID_MJPEG,
44 CODEC_ID_MJPEGB,
45 CODEC_ID_LJPEG,
46 CODEC_ID_SP5X,
47 CODEC_ID_JPEGLS,
48 CODEC_ID_MPEG4,
49 CODEC_ID_RAWVIDEO,
50 CODEC_ID_MSMPEG4V1,
51 CODEC_ID_MSMPEG4V2,
52 CODEC_ID_MSMPEG4V3,
53 CODEC_ID_WMV1,
54 CODEC_ID_WMV2,
55 CODEC_ID_H263P,
56 CODEC_ID_H263I,
57 CODEC_ID_FLV1,
58 CODEC_ID_SVQ1,
59 CODEC_ID_SVQ3,
60 CODEC_ID_DVVIDEO,
61 CODEC_ID_HUFFYUV,
62 CODEC_ID_CYUV,
63 CODEC_ID_H264,
64 CODEC_ID_INDEO3,
65 CODEC_ID_VP3,
66 CODEC_ID_THEORA,
67 CODEC_ID_ASV1,
68 CODEC_ID_ASV2,
69 CODEC_ID_FFV1,
70 CODEC_ID_4XM,
71 CODEC_ID_VCR1,
72 CODEC_ID_CLJR,
73 CODEC_ID_MDEC,
74 CODEC_ID_ROQ,
75 CODEC_ID_INTERPLAY_VIDEO,
76 CODEC_ID_XAN_WC3,
77 CODEC_ID_XAN_WC4,
78 CODEC_ID_RPZA,
79 CODEC_ID_CINEPAK,
80 CODEC_ID_WS_VQA,
81 CODEC_ID_MSRLE,
82 CODEC_ID_MSVIDEO1,
83 CODEC_ID_IDCIN,
84 CODEC_ID_8BPS,
85 CODEC_ID_SMC,
86 CODEC_ID_FLIC,
87 CODEC_ID_TRUEMOTION1,
88 CODEC_ID_VMDVIDEO,
89 CODEC_ID_MSZH,
90 CODEC_ID_ZLIB,
91 CODEC_ID_QTRLE,
92 CODEC_ID_SNOW,
93 CODEC_ID_TSCC,
94 CODEC_ID_ULTI,
95 CODEC_ID_QDRAW,
96 CODEC_ID_VIXL,
97 CODEC_ID_QPEG,
98 CODEC_ID_XVID,
99 CODEC_ID_PNG,
100 CODEC_ID_PPM,
101 CODEC_ID_PBM,
102 CODEC_ID_PGM,
103 CODEC_ID_PGMYUV,
104 CODEC_ID_PAM,
105 CODEC_ID_FFVHUFF,
106 CODEC_ID_RV30,
107 CODEC_ID_RV40,
108 CODEC_ID_VC9,
109 CODEC_ID_WMV3,
110 CODEC_ID_LOCO,
111 CODEC_ID_WNV1,
112 CODEC_ID_AASC,
113 CODEC_ID_INDEO2,
114 CODEC_ID_FRAPS,
115 CODEC_ID_TRUEMOTION2,
116 CODEC_ID_BMP,
117 CODEC_ID_CSCD,
118 CODEC_ID_MMVIDEO,
119 CODEC_ID_ZMBV,
120 CODEC_ID_AVS,
121
122 /* various pcm "codecs" */
123 CODEC_ID_PCM_S16LE= 0x10000,
124 CODEC_ID_PCM_S16BE,
125 CODEC_ID_PCM_U16LE,
126 CODEC_ID_PCM_U16BE,
127 CODEC_ID_PCM_S8,
128 CODEC_ID_PCM_U8,
129 CODEC_ID_PCM_MULAW,
130 CODEC_ID_PCM_ALAW,
131 CODEC_ID_PCM_S32LE,
132 CODEC_ID_PCM_S32BE,
133 CODEC_ID_PCM_U32LE,
134 CODEC_ID_PCM_U32BE,
135 CODEC_ID_PCM_S24LE,
136 CODEC_ID_PCM_S24BE,
137 CODEC_ID_PCM_U24LE,
138 CODEC_ID_PCM_U24BE,
139 CODEC_ID_PCM_S24DAUD,
140
141 /* various adpcm codecs */
142 CODEC_ID_ADPCM_IMA_QT= 0x11000,
143 CODEC_ID_ADPCM_IMA_WAV,
144 CODEC_ID_ADPCM_IMA_DK3,
145 CODEC_ID_ADPCM_IMA_DK4,
146 CODEC_ID_ADPCM_IMA_WS,
147 CODEC_ID_ADPCM_IMA_SMJPEG,
148 CODEC_ID_ADPCM_MS,
149 CODEC_ID_ADPCM_4XM,
150 CODEC_ID_ADPCM_XA,
151 CODEC_ID_ADPCM_ADX,
152 CODEC_ID_ADPCM_EA,
153 CODEC_ID_ADPCM_G726,
154 CODEC_ID_ADPCM_CT,
155 CODEC_ID_ADPCM_SWF,
156 CODEC_ID_ADPCM_YAMAHA,
157 CODEC_ID_ADPCM_SBPRO_4,
158 CODEC_ID_ADPCM_SBPRO_3,
159 CODEC_ID_ADPCM_SBPRO_2,
160
161 /* AMR */
162 CODEC_ID_AMR_NB= 0x12000,
163 CODEC_ID_AMR_WB,
164
165 /* RealAudio codecs*/
166 CODEC_ID_RA_144= 0x13000,
167 CODEC_ID_RA_288,
168
169 /* various DPCM codecs */
170 CODEC_ID_ROQ_DPCM= 0x14000,
171 CODEC_ID_INTERPLAY_DPCM,
172 CODEC_ID_XAN_DPCM,
173 CODEC_ID_SOL_DPCM,
174
175 CODEC_ID_MP2= 0x15000,
176 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
177 CODEC_ID_AAC,
178 CODEC_ID_MPEG4AAC,
179 CODEC_ID_AC3,
180 CODEC_ID_DTS,
181 CODEC_ID_VORBIS,
182 CODEC_ID_DVAUDIO,
183 CODEC_ID_WMAV1,
184 CODEC_ID_WMAV2,
185 CODEC_ID_MACE3,
186 CODEC_ID_MACE6,
187 CODEC_ID_VMDAUDIO,
188 CODEC_ID_SONIC,
189 CODEC_ID_SONIC_LS,
190 CODEC_ID_FLAC,
191 CODEC_ID_MP3ADU,
192 CODEC_ID_MP3ON4,
193 CODEC_ID_SHORTEN,
194 CODEC_ID_ALAC,
195 CODEC_ID_WESTWOOD_SND1,
196 CODEC_ID_GSM,
197 CODEC_ID_QDM2,
198 CODEC_ID_COOK,
199 CODEC_ID_TRUESPEECH,
200 CODEC_ID_TTA,
201
202 CODEC_ID_OGGTHEORA= 0x16000,
203
204 /* subtitle codecs */
205 CODEC_ID_DVD_SUBTITLE= 0x17000,
206 CODEC_ID_DVB_SUBTITLE,
207
208 CODEC_ID_MPEG2TS= 0x20000, /* _FAKE_ codec to indicate a raw MPEG2 transport
209 stream (only used by libavformat) */
210 };
211
212 /* CODEC_ID_MP3LAME is absolete */
213 #define CODEC_ID_MP3LAME CODEC_ID_MP3
214
215 enum CodecType {
216 CODEC_TYPE_UNKNOWN = -1,
217 CODEC_TYPE_VIDEO,
218 CODEC_TYPE_AUDIO,
219 CODEC_TYPE_DATA,
220 CODEC_TYPE_SUBTITLE,
221 };
222
223 /**
224 * Pixel format. Notes:
225 *
226 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
227 * color is put together as:
228 * (A << 24) | (R << 16) | (G << 8) | B
229 * This is stored as BGRA on little endian CPU architectures and ARGB on
230 * big endian CPUs.
231 *
232 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
233 * image data is stored in AVFrame.data[0]. The palette is transported in
234 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
235 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
236 * also endian-specific). Note also that the individual RGB palette
237 * components stored in AVFrame.data[1] should be in the range 0..255.
238 * This is important as many custom PAL8 video codecs that were designed
239 * to run on the IBM VGA graphics adapter use 6-bit palette components.
240 */
241 enum PixelFormat {
242 PIX_FMT_NONE= -1,
243 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
244 PIX_FMT_YUV422, ///< Packed pixel, Y0 Cb Y1 Cr
245 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
246 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
247 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
248 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
249 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
250 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
251 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
252 PIX_FMT_RGB565, ///< always stored in cpu endianness
253 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
254 PIX_FMT_GRAY8,
255 PIX_FMT_MONOWHITE, ///< 0 is white
256 PIX_FMT_MONOBLACK, ///< 0 is black
257 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
258 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
259 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
260 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
261 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
262 PIX_FMT_XVMC_MPEG2_IDCT,
263 PIX_FMT_UYVY422, ///< Packed pixel, Cb Y0 Cr Y1
264 PIX_FMT_UYVY411, ///< Packed pixel, Cb Y0 Y1 Cr Y2 Y3
265 PIX_FMT_NB,
266 };
267
268 /* currently unused, may be used if 24/32 bits samples ever supported */
269 enum SampleFormat {
270 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
271 SAMPLE_FMT_S32, ///< signed 32 bits
272 SAMPLE_FMT_FLT, ///< float
273 SAMPLE_FMT_DBL, ///< double
274 };
275
276 /* in bytes */
277 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32bit audio
278
279 /**
280 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
281 * this is mainly needed because some optimized bitstream readers read
282 * 32 or 64 bit at once and could read over the end<br>
283 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
284 * MPEG bitstreams could cause overread and segfault
285 */
286 #define FF_INPUT_BUFFER_PADDING_SIZE 8
287
288 /**
289 * minimum encoding buffer size.
290 * used to avoid some checks during header writing
291 */
292 #define FF_MIN_BUFFER_SIZE 16384
293
294 /* motion estimation type, EPZS by default */
295 enum Motion_Est_ID {
296 ME_ZERO = 1,
297 ME_FULL,
298 ME_LOG,
299 ME_PHODS,
300 ME_EPZS,
301 ME_X1,
302 ME_HEX,
303 ME_UMH,
304 ME_ITER,
305 };
306
307 enum AVDiscard{
308 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
309 AVDISCARD_NONE =-16, ///< discard nothing
310 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
311 AVDISCARD_NONREF = 8, ///< discard all non reference
312 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
313 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
314 AVDISCARD_ALL = 48, ///< discard all
315 };
316
317 typedef struct RcOverride{
318 int start_frame;
319 int end_frame;
320 int qscale; // if this is 0 then quality_factor will be used instead
321 float quality_factor;
322 } RcOverride;
323
324 /* only for ME compatiblity with old apps */
325 extern int motion_estimation_method;
326
327 #define FF_MAX_B_FRAMES 16
328
329 /* encoding support
330 these flags can be passed in AVCodecContext.flags before initing
331 Note: not everything is supported yet.
332 */
333
334 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
335 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed / Advanced prediction for H263
336 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
337 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
338 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
339 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
340 /* parent program gurantees that the input for b-frame containing streams is not written to
341 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
342 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
343 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
344 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
345 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
346 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
347 #define CODEC_FLAG_EMU_EDGE 0x4000///< don't draw edges
348 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
349 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
350 of only at frame boundaries */
351 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
352 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
353 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
354 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
355 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
356 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
357 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
358 /* Fx : Flag for h263+ extra options */
359 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
360 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
361 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
362 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
363 #define CODEC_FLAG_QP_RD 0x08000000 ///< use rate distortion optimization for qp selectioon
364 #define CODEC_FLAG_H263P_AIV 0x00000008 ///< H263 Alternative inter vlc
365 #define CODEC_FLAG_OBMC 0x00000001 ///< OBMC
366 #define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
367 #define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
368 #define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
369 #define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
370 #define CODEC_FLAG_CLOSED_GOP 0x80000000
371 #define CODEC_FLAG2_FAST 0x00000001 ///< allow non spec compliant speedup tricks
372 #define CODEC_FLAG2_STRICT_GOP 0x00000002 ///< strictly enforce GOP size
373 #define CODEC_FLAG2_NO_OUTPUT 0x00000004 ///< skip bitstream encoding
374 #define CODEC_FLAG2_LOCAL_HEADER 0x00000008 ///< place global headers at every keyframe instead of in extradata
375 #define CODEC_FLAG2_BPYRAMID 0x00000010 ///< H.264 allow b-frames to be used as references
376 #define CODEC_FLAG2_WPRED 0x00000020 ///< H.264 weighted biprediction for b-frames
377 #define CODEC_FLAG2_MIXED_REFS 0x00000040 ///< H.264 multiple references per partition
378 #define CODEC_FLAG2_8X8DCT 0x00000080 ///< H.264 high profile 8x8 transform
379 #define CODEC_FLAG2_FASTPSKIP 0x00000100 ///< H.264 fast pskip
380 #define CODEC_FLAG2_AUD 0x00000200 ///< H.264 access unit delimiters
381 #define CODEC_FLAG2_BRDO 0x00000400 ///< b-frame rate-distortion optimization
382
383 /* Unsupported options :
384 * Syntax Arithmetic coding (SAC)
385 * Reference Picture Selection
386 * Independant Segment Decoding */
387 /* /Fx */
388 /* codec capabilities */
389
390 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
391 /**
392 * Codec uses get_buffer() for allocating buffers.
393 * direct rendering method 1
394 */
395 #define CODEC_CAP_DR1 0x0002
396 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
397 used */
398 #define CODEC_CAP_PARSE_ONLY 0x0004
399 #define CODEC_CAP_TRUNCATED 0x0008
400 /* codec can export data for HW decoding (XvMC) */
401 #define CODEC_CAP_HWACCEL 0x0010
402 /**
403 * codec has a non zero delay and needs to be feeded with NULL at the end to get the delayed data.
404 * if this is not set, the codec is guranteed to never be feeded with NULL data
405 */
406 #define CODEC_CAP_DELAY 0x0020
407
408 //the following defines may change, don't expect compatibility if you use them
409 #define MB_TYPE_INTRA4x4 0x0001
410 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
411 #define MB_TYPE_INTRA_PCM 0x0004 //FIXME h264 specific
412 #define MB_TYPE_16x16 0x0008
413 #define MB_TYPE_16x8 0x0010
414 #define MB_TYPE_8x16 0x0020
415 #define MB_TYPE_8x8 0x0040
416 #define MB_TYPE_INTERLACED 0x0080
417 #define MB_TYPE_DIRECT2 0x0100 //FIXME
418 #define MB_TYPE_ACPRED 0x0200
419 #define MB_TYPE_GMC 0x0400
420 #define MB_TYPE_SKIP 0x0800
421 #define MB_TYPE_P0L0 0x1000
422 #define MB_TYPE_P1L0 0x2000
423 #define MB_TYPE_P0L1 0x4000
424 #define MB_TYPE_P1L1 0x8000
425 #define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
426 #define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
427 #define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
428 #define MB_TYPE_QUANT 0x00010000
429 #define MB_TYPE_CBP 0x00020000
430 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 0mv, ...)
431
432 /**
433 * Pan Scan area.
434 * this specifies the area which should be displayed. Note there may be multiple such areas for one frame
435 */
436 typedef struct AVPanScan{
437 /**
438 * id.
439 * - encoding: set by user.
440 * - decoding: set by lavc
441 */
442 int id;
443
444 /**
445 * width and height in 1/16 pel
446 * - encoding: set by user.
447 * - decoding: set by lavc
448 */
449 int width;
450 int height;
451
452 /**
453 * position of the top left corner in 1/16 pel for up to 3 fields/frames.
454 * - encoding: set by user.
455 * - decoding: set by lavc
456 */
457 int16_t position[3][2];
458 }AVPanScan;
459
460 #define FF_COMMON_FRAME \
461 /**\
462 * pointer to the picture planes.\
463 * this might be different from the first allocated byte\
464 * - encoding: \
465 * - decoding: \
466 */\
467 uint8_t *data[4];\
468 int linesize[4];\
469 /**\
470 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
471 * this isn't used by lavc unless the default get/release_buffer() is used\
472 * - encoding: \
473 * - decoding: \
474 */\
475 uint8_t *base[4];\
476 /**\
477 * 1 -> keyframe, 0-> not\
478 * - encoding: set by lavc\
479 * - decoding: set by lavc\
480 */\
481 int key_frame;\
482 \
483 /**\
484 * picture type of the frame, see ?_TYPE below.\
485 * - encoding: set by lavc for coded_picture (and set by user for input)\
486 * - decoding: set by lavc\
487 */\
488 int pict_type;\
489 \
490 /**\
491 * presentation timestamp in time_base units (time when frame should be shown to user)\
492 * if AV_NOPTS_VALUE then frame_rate = 1/time_base will be assumed\
493 * - encoding: MUST be set by user\
494 * - decoding: set by lavc\
495 */\
496 int64_t pts;\
497 \
498 /**\
499 * picture number in bitstream order.\
500 * - encoding: set by\
501 * - decoding: set by lavc\
502 */\
503 int coded_picture_number;\
504 /**\
505 * picture number in display order.\
506 * - encoding: set by\
507 * - decoding: set by lavc\
508 */\
509 int display_picture_number;\
510 \
511 /**\
512 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
513 * - encoding: set by lavc for coded_picture (and set by user for input)\
514 * - decoding: set by lavc\
515 */\
516 int quality; \
517 \
518 /**\
519 * buffer age (1->was last buffer and dint change, 2->..., ...).\
520 * set to INT_MAX if the buffer has not been used yet \
521 * - encoding: unused\
522 * - decoding: MUST be set by get_buffer()\
523 */\
524 int age;\
525 \
526 /**\
527 * is this picture used as reference\
528 * - encoding: unused\
529 * - decoding: set by lavc (before get_buffer() call))\
530 */\
531 int reference;\
532 \
533 /**\
534 * QP table\
535 * - encoding: unused\
536 * - decoding: set by lavc\
537 */\
538 int8_t *qscale_table;\
539 /**\
540 * QP store stride\
541 * - encoding: unused\
542 * - decoding: set by lavc\
543 */\
544 int qstride;\
545 \
546 /**\
547 * mbskip_table[mb]>=1 if MB didnt change\
548 * stride= mb_width = (width+15)>>4\
549 * - encoding: unused\
550 * - decoding: set by lavc\
551 */\
552 uint8_t *mbskip_table;\
553 \
554 /**\
555 * Motion vector table.\
556 * @code\
557 * example:\
558 * int mv_sample_log2= 4 - motion_subsample_log2;\
559 * int mb_width= (width+15)>>4;\
560 * int mv_stride= (mb_width << mv_sample_log2) + 1;\
561 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];\
562 * @endcode\
563 * - encoding: set by user\
564 * - decoding: set by lavc\
565 */\
566 int16_t (*motion_val[2])[2];\
567 \
568 /**\
569 * Macroblock type table\
570 * mb_type_base + mb_width + 2\
571 * - encoding: set by user\
572 * - decoding: set by lavc\
573 */\
574 uint32_t *mb_type;\
575 \
576 /**\
577 * log2 of the size of the block which a single vector in motion_val represents: \
578 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)\
579 * - encoding: unused\
580 * - decoding: set by lavc\
581 */\
582 uint8_t motion_subsample_log2;\
583 \
584 /**\
585 * for some private data of the user\
586 * - encoding: unused\
587 * - decoding: set by user\
588 */\
589 void *opaque;\
590 \
591 /**\
592 * error\
593 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
594 * - decoding: unused\
595 */\
596 uint64_t error[4];\
597 \
598 /**\
599 * type of the buffer (to keep track of who has to dealloc data[*])\
600 * - encoding: set by the one who allocs it\
601 * - decoding: set by the one who allocs it\
602 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
603 */\
604 int type;\
605 \
606 /**\
607 * when decoding, this signal how much the picture must be delayed.\
608 * extra_delay = repeat_pict / (2*fps)\
609 * - encoding: unused\
610 * - decoding: set by lavc\
611 */\
612 int repeat_pict;\
613 \
614 /**\
615 * \
616 */\
617 int qscale_type;\
618 \
619 /**\
620 * The content of the picture is interlaced.\
621 * - encoding: set by user\
622 * - decoding: set by lavc (default 0)\
623 */\
624 int interlaced_frame;\
625 \
626 /**\
627 * if the content is interlaced, is top field displayed first.\
628 * - encoding: set by user\
629 * - decoding: set by lavc\
630 */\
631 int top_field_first;\
632 \
633 /**\
634 * Pan scan.\
635 * - encoding: set by user\
636 * - decoding: set by lavc\
637 */\
638 AVPanScan *pan_scan;\
639 \
640 /**\
641 * tell user application that palette has changed from previous frame.\
642 * - encoding: ??? (no palette-enabled encoder yet)\
643 * - decoding: set by lavc (default 0)\
644 */\
645 int palette_has_changed;\
646 \
647 /**\
648 * Codec suggestion on buffer type if != 0\
649 * - encoding: unused\
650 * - decoding: set by lavc (before get_buffer() call))\
651 */\
652 int buffer_hints;\
653 \
654 /**\
655 * DCT coeffitients\
656 * - encoding: unused\
657 * - decoding: set by lavc\
658 */\
659 short *dct_coeff;\
660 \
661 /**\
662 * Motion referece frame index\
663 * - encoding: set by user\
664 * - decoding: set by lavc\
665 */\
666 int8_t *ref_index[2];
667
668 #define FF_QSCALE_TYPE_MPEG1 0
669 #define FF_QSCALE_TYPE_MPEG2 1
670 #define FF_QSCALE_TYPE_H264 2
671
672 #define FF_BUFFER_TYPE_INTERNAL 1
673 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
674 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewhere else, don't dealloc image (data/base), all other tables are not shared
675 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, don't dealloc anything
676
677
678 #define FF_I_TYPE 1 // Intra
679 #define FF_P_TYPE 2 // Predicted
680 #define FF_B_TYPE 3 // Bi-dir predicted
681 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
682 #define FF_SI_TYPE 5
683 #define FF_SP_TYPE 6
684
685 #define FF_BUFFER_HINTS_VALID 0x01 // Buffer hints value is meaningful (if 0 ignore)
686 #define FF_BUFFER_HINTS_READABLE 0x02 // Codec will read from buffer
687 #define FF_BUFFER_HINTS_PRESERVE 0x04 // User must not alter buffer content
688 #define FF_BUFFER_HINTS_REUSABLE 0x08 // Codec will reuse the buffer (update)
689
690 /**
691 * Audio Video Frame.
692 */
693 typedef struct AVFrame {
694 FF_COMMON_FRAME
695 } AVFrame;
696
697 #define DEFAULT_FRAME_RATE_BASE 1001000
698
699 /**
700 * Used by av_log
701 */
702 typedef struct AVCLASS AVClass;
703 struct AVCLASS {
704 const char* class_name;
705 const char* (*item_name)(void*); /* actually passing a pointer to an AVCodecContext
706 or AVFormatContext, which begin with an AVClass.
707 Needed because av_log is in libavcodec and has no visibility
708 of AVIn/OutputFormat */
709 struct AVOption *option;
710 };
711
712 /**
713 * main external api structure.
714 */
715 typedef struct AVCodecContext {
716 /**
717 * Info on struct for av_log
718 * - set by avcodec_alloc_context
719 */
720 AVClass *av_class;
721 /**
722 * the average bitrate.
723 * - encoding: set by user. unused for constant quantizer encoding
724 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
725 */
726 int bit_rate;
727
728 /**
729 * number of bits the bitstream is allowed to diverge from the reference.
730 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
731 * - encoding: set by user. unused for constant quantizer encoding
732 * - decoding: unused
733 */
734 int bit_rate_tolerance;
735
736 /**
737 * CODEC_FLAG_*.
738 * - encoding: set by user.
739 * - decoding: set by user.
740 */
741 int flags;
742
743 /**
744 * some codecs needs additionnal format info. It is stored here
745 * - encoding: set by user.
746 * - decoding: set by lavc. (FIXME is this ok?)
747 */
748 int sub_id;
749
750 /**
751 * motion estimation algorithm used for video coding.
752 * 1 (zero), 2 (full), 3 (log), 4 (phods), 5 (epzs), 6 (x1), 7 (hex),
753 * 8 (umh), 9 (iter) [7, 8 are x264 specific, 9 is snow specific]
754 * - encoding: MUST be set by user.
755 * - decoding: unused
756 */
757 int me_method;
758
759 /**
760 * some codecs need / can use extra-data like huffman tables.
761 * mjpeg: huffman tables
762 * rv10: additional flags
763 * mpeg4: global headers (they can be in the bitstream or here)
764 * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
765 * then extradata_size to avoid prolems if its read with the bitstream reader
766 * the bytewise contents of extradata must not depend on the architecture or cpu endianness
767 * - encoding: set/allocated/freed by lavc.
768 * - decoding: set/allocated/freed by user.
769 */
770 void *extradata;
771 int extradata_size;
772
773 /**
774 * this is the fundamental unit of time (in seconds) in terms
775 * of which frame timestamps are represented. for fixed-fps content,
776 * timebase should be 1/framerate and timestamp increments should be
777 * identically 1.
778 * - encoding: MUST be set by user
779 * - decoding: set by lavc.
780 */
781 AVRational time_base;
782
783 /* video only */
784 /**
785 * picture width / height.
786 * - encoding: MUST be set by user.
787 * - decoding: set by lavc.
788 * Note, for compatibility its possible to set this instead of
789 * coded_width/height before decoding
790 */
791 int width, height;
792
793 #define FF_ASPECT_EXTENDED 15
794
795 /**
796 * the number of pictures in a group of pitures, or 0 for intra_only.
797 * - encoding: set by user.
798 * - decoding: unused
799 */
800 int gop_size;
801
802 /**
803 * pixel format, see PIX_FMT_xxx.
804 * - encoding: set by user.
805 * - decoding: set by lavc.
806 */
807 enum PixelFormat pix_fmt;
808
809 /**
810 * Frame rate emulation. If not zero lower layer (i.e. format handler)
811 * has to read frames at native frame rate.
812 * - encoding: set by user.
813 * - decoding: unused.
814 */
815 int rate_emu;
816
817 /**
818 * if non NULL, 'draw_horiz_band' is called by the libavcodec
819 * decoder to draw an horizontal band. It improve cache usage. Not
820 * all codecs can do that. You must check the codec capabilities
821 * before
822 * - encoding: unused
823 * - decoding: set by user.
824 * @param height the height of the slice
825 * @param y the y position of the slice
826 * @param type 1->top field, 2->bottom field, 3->frame
827 * @param offset offset into the AVFrame.data from which the slice should be read
828 */
829 void (*draw_horiz_band)(struct AVCodecContext *s,
830 const AVFrame *src, int offset[4],
831 int y, int type, int height);
832
833 /* audio only */
834 int sample_rate; ///< samples per sec
835 int channels;
836
837 /**
838 * audio sample format.
839 * - encoding: set by user.
840 * - decoding: set by lavc.
841 */
842 enum SampleFormat sample_fmt; ///< sample format, currenly unused
843
844 /* the following data should not be initialized */
845 /**
846 * samples per packet. initialized when calling 'init'
847 */
848 int frame_size;
849 int frame_number; ///< audio or video frame number
850 int real_pict_num; ///< returns the real picture number of previous encoded frame
851
852 /**
853 * number of frames the decoded output will be delayed relative to
854 * the encoded input.
855 * - encoding: set by lavc.
856 * - decoding: unused
857 */
858 int delay;
859
860 /* - encoding parameters */
861 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
862 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
863
864 /**
865 * minimum quantizer.
866 * - encoding: set by user.
867 * - decoding: unused
868 */
869 int qmin;
870
871 /**
872 * maximum quantizer.
873 * - encoding: set by user.
874 * - decoding: unused
875 */
876 int qmax;
877
878 /**
879 * maximum quantizer difference etween frames.
880 * - encoding: set by user.
881 * - decoding: unused
882 */
883 int max_qdiff;
884
885 /**
886 * maximum number of b frames between non b frames.
887 * note: the output will be delayed by max_b_frames+1 relative to the input
888 * - encoding: set by user.
889 * - decoding: unused
890 */
891 int max_b_frames;
892
893 /**
894 * qscale factor between ip and b frames.
895 * - encoding: set by user.
896 * - decoding: unused
897 */
898 float b_quant_factor;
899
900 /** obsolete FIXME remove */
901 int rc_strategy;
902 #define FF_RC_STRATEGY_XVID 1
903
904 int b_frame_strategy;
905
906 /**
907 * hurry up amount.
908 * deprecated in favor of skip_idct and skip_frame
909 * - encoding: unused
910 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
911 */
912 int hurry_up;
913
914 struct AVCodec *codec;
915
916 void *priv_data;
917
918 /* unused, FIXME remove*/
919 int rtp_mode;
920
921 int rtp_payload_size; /* The size of the RTP payload: the coder will */
922 /* do it's best to deliver a chunk with size */
923 /* below rtp_payload_size, the chunk will start */
924 /* with a start code on some codecs like H.263 */
925 /* This doesn't take account of any particular */
926 /* headers inside the transmited RTP payload */
927
928
929 /* The RTP callback: This function is called */
930 /* every time the encoder has a packet to send */
931 /* Depends on the encoder if the data starts */
932 /* with a Start Code (it should) H.263 does. */
933 /* mb_nb contains the number of macroblocks */
934 /* encoded in the RTP payload */
935 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
936
937 /* statistics, used for 2-pass encoding */
938 int mv_bits;
939 int header_bits;
940 int i_tex_bits;
941 int p_tex_bits;
942 int i_count;
943 int p_count;
944 int skip_count;
945 int misc_bits;
946
947 /**
948 * number of bits used for the previously encoded frame.
949 * - encoding: set by lavc
950 * - decoding: unused
951 */
952 int frame_bits;
953
954 /**
955 * private data of the user, can be used to carry app specific stuff.
956 * - encoding: set by user
957 * - decoding: set by user
958 */
959 void *opaque;
960
961 char codec_name[32];
962 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
963 enum CodecID codec_id; /* see CODEC_ID_xxx */
964
965 /**
966 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
967 * this is used to workaround some encoder bugs
968 * - encoding: set by user, if not then the default based on codec_id will be used
969 * - decoding: set by user, will be converted to upper case by lavc during init
970 */
971 unsigned int codec_tag;
972
973 /**
974 * workaround bugs in encoders which sometimes cannot be detected automatically.
975 * - encoding: set by user
976 * - decoding: set by user
977 */
978 int workaround_bugs;
979 #define FF_BUG_AUTODETECT 1 ///< autodetection
980 #define FF_BUG_OLD_MSMPEG4 2
981 #define FF_BUG_XVID_ILACE 4
982 #define FF_BUG_UMP4 8
983 #define FF_BUG_NO_PADDING 16
984 #define FF_BUG_AMV 32
985 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
986 #define FF_BUG_QPEL_CHROMA 64
987 #define FF_BUG_STD_QPEL 128
988 #define FF_BUG_QPEL_CHROMA2 256
989 #define FF_BUG_DIRECT_BLOCKSIZE 512
990 #define FF_BUG_EDGE 1024
991 #define FF_BUG_HPEL_CHROMA 2048
992 #define FF_BUG_DC_CLIP 4096
993 #define FF_BUG_MS 8192 ///< workaround various bugs in microsofts broken decoders
994 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
995
996 /**
997 * luma single coeff elimination threshold.
998 * - encoding: set by user
999 * - decoding: unused
1000 */
1001 int luma_elim_threshold;
1002
1003 /**
1004 * chroma single coeff elimination threshold.
1005 * - encoding: set by user
1006 * - decoding: unused
1007 */
1008 int chroma_elim_threshold;
1009
1010 /**
1011 * strictly follow the std (MPEG4, ...).
1012 * - encoding: set by user
1013 * - decoding: unused
1014 */
1015 int strict_std_compliance;
1016 #define FF_COMPLIANCE_VERY_STRICT 2 ///< strictly conform to a older more strict version of the spec or reference software
1017 #define FF_COMPLIANCE_STRICT 1 ///< strictly conform to all the things in the spec no matter what consequences
1018 #define FF_COMPLIANCE_NORMAL 0
1019 #define FF_COMPLIANCE_INOFFICIAL -1 ///< allow inofficial extensions
1020 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< allow non standarized experimental things
1021
1022 /**
1023 * qscale offset between ip and b frames.
1024 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1025 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1026 * - encoding: set by user.
1027 * - decoding: unused
1028 */
1029 float b_quant_offset;
1030
1031 /**
1032 * error resilience higher values will detect more errors but may missdetect
1033 * some more or less valid parts as errors.
1034 * - encoding: unused
1035 * - decoding: set by user
1036 */
1037 int error_resilience;
1038 #define FF_ER_CAREFUL 1
1039 #define FF_ER_COMPLIANT 2
1040 #define FF_ER_AGGRESSIVE 3
1041 #define FF_ER_VERY_AGGRESSIVE 4
1042
1043 /**
1044 * called at the beginning of each frame to get a buffer for it.
1045 * if pic.reference is set then the frame will be read later by lavc
1046 * avcodec_align_dimensions() should be used to find the required width and
1047 * height, as they normally need to be rounded up to the next multiple of 16
1048 * - encoding: unused
1049 * - decoding: set by lavc, user can override
1050 */
1051 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
1052
1053 /**
1054 * called to release buffers which where allocated with get_buffer.
1055 * a released buffer can be reused in get_buffer()
1056 * pic.data[*] must be set to NULL
1057 * - encoding: unused
1058 * - decoding: set by lavc, user can override
1059 */
1060 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
1061
1062 /**
1063 * if 1 the stream has a 1 frame delay during decoding.
1064 * - encoding: set by lavc
1065 * - decoding: set by lavc
1066 */
1067 int has_b_frames;
1068
1069 /**
1070 * number of bytes per packet if constant and known or 0
1071 * used by some WAV based audio codecs
1072 */
1073 int block_align;
1074
1075 int parse_only; /* - decoding only: if true, only parsing is done
1076 (function avcodec_parse_frame()). The frame
1077 data is returned. Only MPEG codecs support this now. */
1078
1079 /**
1080 * 0-> h263 quant 1-> mpeg quant.
1081 * - encoding: set by user.
1082 * - decoding: unused
1083 */
1084 int mpeg_quant;
1085
1086 /**
1087 * pass1 encoding statistics output buffer.
1088 * - encoding: set by lavc
1089 * - decoding: unused
1090 */
1091 char *stats_out;
1092
1093 /**
1094 * pass2 encoding statistics input buffer.
1095 * concatenated stuff from stats_out of pass1 should be placed here
1096 * - encoding: allocated/set/freed by user
1097 * - decoding: unused
1098 */
1099 char *stats_in;
1100
1101 /**
1102 * ratecontrol qmin qmax limiting method.
1103 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
1104 * - encoding: set by user.
1105 * - decoding: unused
1106 */
1107 float rc_qsquish;
1108
1109 float rc_qmod_amp;
1110 int rc_qmod_freq;
1111
1112 /**
1113 * ratecontrol override, see RcOverride.
1114 * - encoding: allocated/set/freed by user.
1115 * - decoding: unused
1116 */
1117 RcOverride *rc_override;
1118 int rc_override_count;
1119
1120 /**
1121 * rate control equation.
1122 * - encoding: set by user
1123 * - decoding: unused
1124 */
1125 char *rc_eq;
1126
1127 /**
1128 * maximum bitrate.
1129 * - encoding: set by user.
1130 * - decoding: unused
1131 */
1132 int rc_max_rate;
1133
1134 /**
1135 * minimum bitrate.
1136 * - encoding: set by user.
1137 * - decoding: unused
1138 */
1139 int rc_min_rate;
1140
1141 /**
1142 * decoder bitstream buffer size.
1143 * - encoding: set by user.
1144 * - decoding: unused
1145 */
1146 int rc_buffer_size;
1147 float rc_buffer_aggressivity;
1148
1149 /**
1150 * qscale factor between p and i frames.
1151 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
1152 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
1153 * - encoding: set by user.
1154 * - decoding: unused
1155 */
1156 float i_quant_factor;
1157
1158 /**
1159 * qscale offset between p and i frames.
1160 * - encoding: set by user.
1161 * - decoding: unused
1162 */
1163 float i_quant_offset;
1164
1165 /**
1166 * initial complexity for pass1 ratecontrol.
1167 * - encoding: set by user.
1168 * - decoding: unused
1169 */
1170 float rc_initial_cplx;
1171
1172 /**
1173 * dct algorithm, see FF_DCT_* below.
1174 * - encoding: set by user
1175 * - decoding: unused
1176 */
1177 int dct_algo;
1178 #define FF_DCT_AUTO 0
1179 #define FF_DCT_FASTINT 1
1180 #define FF_DCT_INT 2
1181 #define FF_DCT_MMX 3
1182 #define FF_DCT_MLIB 4
1183 #define FF_DCT_ALTIVEC 5
1184 #define FF_DCT_FAAN 6
1185
1186 /**
1187 * luminance masking (0-> disabled).
1188 * - encoding: set by user
1189 * - decoding: unused
1190 */
1191 float lumi_masking;
1192
1193 /**
1194 * temporary complexity masking (0-> disabled).
1195 * - encoding: set by user
1196 * - decoding: unused
1197 */
1198 float temporal_cplx_masking;
1199
1200 /**
1201 * spatial complexity masking (0-> disabled).
1202 * - encoding: set by user
1203 * - decoding: unused
1204 */
1205 float spatial_cplx_masking;
1206
1207 /**
1208 * p block masking (0-> disabled).
1209 * - encoding: set by user
1210 * - decoding: unused
1211 */
1212 float p_masking;
1213
1214 /**
1215 * darkness masking (0-> disabled).
1216 * - encoding: set by user
1217 * - decoding: unused
1218 */
1219 float dark_masking;
1220
1221
1222 /* for binary compatibility */
1223 int unused;
1224
1225 /**
1226 * idct algorithm, see FF_IDCT_* below.
1227 * - encoding: set by user
1228 * - decoding: set by user
1229 */
1230 int idct_algo;
1231 #define FF_IDCT_AUTO 0
1232 #define FF_IDCT_INT 1
1233 #define FF_IDCT_SIMPLE 2
1234 #define FF_IDCT_SIMPLEMMX 3
1235 #define FF_IDCT_LIBMPEG2MMX 4
1236 #define FF_IDCT_PS2 5
1237 #define FF_IDCT_MLIB 6
1238 #define FF_IDCT_ARM 7
1239 #define FF_IDCT_ALTIVEC 8
1240 #define FF_IDCT_SH4 9
1241 #define FF_IDCT_SIMPLEARM 10
1242 #define FF_IDCT_H264 11
1243 #define FF_IDCT_VP3 12
1244 #define FF_IDCT_IPP 13
1245 #define FF_IDCT_XVIDMMX 14
1246
1247 /**
1248 * slice count.
1249 * - encoding: set by lavc
1250 * - decoding: set by user (or 0)
1251 */
1252 int slice_count;
1253 /**
1254 * slice offsets in the frame in bytes.
1255 * - encoding: set/allocated by lavc
1256 * - decoding: set/allocated by user (or NULL)
1257 */
1258 int *slice_offset;
1259
1260 /**
1261 * error concealment flags.
1262 * - encoding: unused
1263 * - decoding: set by user
1264 */
1265 int error_concealment;
1266 #define FF_EC_GUESS_MVS 1
1267 #define FF_EC_DEBLOCK 2
1268
1269 /**
1270 * dsp_mask could be add used to disable unwanted CPU features
1271 * CPU features (i.e. MMX, SSE. ...)
1272 *
1273 * with FORCE flag you may instead enable given CPU features
1274 * (Dangerous: usable in case of misdetection, improper usage however will
1275 * result into program crash)
1276 */
1277 unsigned dsp_mask;
1278 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
1279 /* lower 16 bits - CPU features */
1280 #ifdef HAVE_MMX
1281 #define FF_MM_MMX 0x0001 /* standard MMX */
1282 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
1283 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
1284 #define FF_MM_SSE 0x0008 /* SSE functions */
1285 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
1286 #define FF_MM_3DNOWEXT 0x0020 /* AMD 3DNowExt */
1287 #endif /* HAVE_MMX */
1288 #ifdef HAVE_IWMMXT
1289 #define FF_MM_IWMMXT 0x0100 /* XScale IWMMXT */
1290 #endif /* HAVE_IWMMXT */
1291
1292 /**
1293 * bits per sample/pixel from the demuxer (needed for huffyuv).
1294 * - encoding: set by lavc
1295 * - decoding: set by user
1296 */
1297 int bits_per_sample;
1298
1299 /**
1300 * prediction method (needed for huffyuv).
1301 * - encoding: set by user
1302 * - decoding: unused
1303 */
1304 int prediction_method;
1305 #define FF_PRED_LEFT 0
1306 #define FF_PRED_PLANE 1
1307 #define FF_PRED_MEDIAN 2
1308
1309 /**
1310 * sample aspect ratio (0 if unknown).
1311 * numerator and denominator must be relative prime and smaller then 256 for some video standards
1312 * - encoding: set by user.
1313 * - decoding: set by lavc.
1314 */
1315 AVRational sample_aspect_ratio;
1316
1317 /**
1318 * the picture in the bitstream.
1319 * - encoding: set by lavc
1320 * - decoding: set by lavc
1321 */
1322 AVFrame *coded_frame;
1323
1324 /**
1325 * debug.
1326 * - encoding: set by user.
1327 * - decoding: set by user.
1328 */
1329 int debug;
1330 #define FF_DEBUG_PICT_INFO 1
1331 #define FF_DEBUG_RC 2
1332 #define FF_DEBUG_BITSTREAM 4
1333 #define FF_DEBUG_MB_TYPE 8
1334 #define FF_DEBUG_QP 16
1335 #define FF_DEBUG_MV 32
1336 #define FF_DEBUG_DCT_COEFF 0x00000040
1337 #define FF_DEBUG_SKIP 0x00000080
1338 #define FF_DEBUG_STARTCODE 0x00000100
1339 #define FF_DEBUG_PTS 0x00000200
1340 #define FF_DEBUG_ER 0x00000400
1341 #define FF_DEBUG_MMCO 0x00000800
1342 #define FF_DEBUG_BUGS 0x00001000
1343 #define FF_DEBUG_VIS_QP 0x00002000
1344 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
1345
1346 /**
1347 * debug.
1348 * - encoding: set by user.
1349 * - decoding: set by user.
1350 */
1351 int debug_mv;
1352 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
1353 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
1354 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
1355
1356 /**
1357 * error.
1358 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1359 * - decoding: unused
1360 */
1361 uint64_t error[4];
1362
1363 /**
1364 * minimum MB quantizer.
1365 * - encoding: unused
1366 * - decoding: unused
1367 */
1368 int mb_qmin;
1369
1370 /**
1371 * maximum MB quantizer.
1372 * - encoding: unused
1373 * - decoding: unused
1374 */
1375 int mb_qmax;
1376
1377 /**
1378 * motion estimation compare function.
1379 * - encoding: set by user.
1380 * - decoding: unused
1381 */
1382 int me_cmp;
1383 /**
1384 * subpixel motion estimation compare function.
1385 * - encoding: set by user.
1386 * - decoding: unused
1387 */
1388 int me_sub_cmp;
1389 /**
1390 * macroblock compare function (not supported yet).
1391 * - encoding: set by user.
1392 * - decoding: unused
1393 */
1394 int mb_cmp;
1395 /**
1396 * interlaced dct compare function
1397 * - encoding: set by user.
1398 * - decoding: unused
1399 */
1400 int ildct_cmp;
1401 #define FF_CMP_SAD 0
1402 #define FF_CMP_SSE 1
1403 #define FF_CMP_SATD 2
1404 #define FF_CMP_DCT 3
1405 #define FF_CMP_PSNR 4
1406 #define FF_CMP_BIT 5
1407 #define FF_CMP_RD 6
1408 #define FF_CMP_ZERO 7
1409 #define FF_CMP_VSAD 8
1410 #define FF_CMP_VSSE 9
1411 #define FF_CMP_NSSE 10
1412 #define FF_CMP_W53 11
1413 #define FF_CMP_W97 12
1414 #define FF_CMP_DCTMAX 13
1415 #define FF_CMP_DCT264 14
1416 #define FF_CMP_CHROMA 256
1417
1418 /**
1419 * ME diamond size & shape.
1420 * - encoding: set by user.
1421 * - decoding: unused
1422 */
1423 int dia_size;
1424
1425 /**
1426 * amount of previous MV predictors (2a+1 x 2a+1 square).
1427 * - encoding: set by user.
1428 * - decoding: unused
1429 */
1430 int last_predictor_count;
1431
1432 /**
1433 * pre pass for motion estimation.
1434 * - encoding: set by user.
1435 * - decoding: unused
1436 */
1437 int pre_me;
1438
1439 /**
1440 * motion estimation pre pass compare function.
1441 * - encoding: set by user.
1442 * - decoding: unused
1443 */
1444 int me_pre_cmp;
1445
1446 /**
1447 * ME pre pass diamond size & shape.
1448 * - encoding: set by user.
1449 * - decoding: unused
1450 */
1451 int pre_dia_size;
1452
1453 /**
1454 * subpel ME quality.
1455 * - encoding: set by user.
1456 * - decoding: unused
1457 */
1458 int me_subpel_quality;
1459
1460 /**
1461 * callback to negotiate the pixelFormat.
1462 * @param fmt is the list of formats which are supported by the codec,
1463 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1464 * the first is allways the native one
1465 * @return the choosen format
1466 * - encoding: unused
1467 * - decoding: set by user, if not set then the native format will always be choosen
1468 */
1469 enum PixelFormat (*get_format)(struct AVCodecContext *s, const enum PixelFormat * fmt);
1470
1471 /**
1472 * DTG active format information (additionnal aspect ratio
1473 * information only used in DVB MPEG2 transport streams). 0 if
1474 * not set.
1475 *
1476 * - encoding: unused.
1477 * - decoding: set by decoder
1478 */
1479 int dtg_active_format;
1480 #define FF_DTG_AFD_SAME 8
1481 #define FF_DTG_AFD_4_3 9
1482 #define FF_DTG_AFD_16_9 10
1483 #define FF_DTG_AFD_14_9 11
1484 #define FF_DTG_AFD_4_3_SP_14_9 13
1485 #define FF_DTG_AFD_16_9_SP_14_9 14
1486 #define FF_DTG_AFD_SP_4_3 15
1487
1488 /**
1489 * Maximum motion estimation search range in subpel units.
1490 * if 0 then no limit
1491 *
1492 * - encoding: set by user.
1493 * - decoding: unused.
1494 */
1495 int me_range;
1496
1497 /**
1498 * intra quantizer bias.
1499 * - encoding: set by user.
1500 * - decoding: unused
1501 */
1502 int intra_quant_bias;
1503 #define FF_DEFAULT_QUANT_BIAS 999999
1504
1505 /**
1506 * inter quantizer bias.
1507 * - encoding: set by user.
1508 * - decoding: unused
1509 */
1510 int inter_quant_bias;
1511
1512 /**
1513 * color table ID.
1514 * - encoding: unused.
1515 * - decoding: which clrtable should be used for 8bit RGB images
1516 * table have to be stored somewhere FIXME
1517 */
1518 int color_table_id;
1519
1520 /**
1521 * internal_buffer count.
1522 * Don't touch, used by lavc default_get_buffer()
1523 */
1524 int internal_buffer_count;
1525
1526 /**
1527 * internal_buffers.
1528 * Don't touch, used by lavc default_get_buffer()
1529 */
1530 void *internal_buffer;
1531
1532 #define FF_LAMBDA_SHIFT 7
1533 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1534 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1535 #define FF_LAMBDA_MAX (256*128-1)
1536
1537 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1538 /**
1539 * global quality for codecs which cannot change it per frame.
1540 * this should be proportional to MPEG1/2/4 qscale.
1541 * - encoding: set by user.
1542 * - decoding: unused
1543 */
1544 int global_quality;
1545
1546 #define FF_CODER_TYPE_VLC 0
1547 #define FF_CODER_TYPE_AC 1
1548 /**
1549 * coder type
1550 * - encoding: set by user.
1551 * - decoding: unused
1552 */
1553 int coder_type;
1554
1555 /**
1556 * context model
1557 * - encoding: set by user.
1558 * - decoding: unused
1559 */
1560 int context_model;
1561 #if 0
1562 /**
1563 *
1564 * - encoding: unused
1565 * - decoding: set by user.
1566 */
1567 uint8_t * (*realloc)(struct AVCodecContext *s, uint8_t *buf, int buf_size);
1568 #endif
1569
1570 /**
1571 * slice flags
1572 * - encoding: unused
1573 * - decoding: set by user.
1574 */
1575 int slice_flags;
1576 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1577 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1578 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1579
1580 /**
1581 * XVideo Motion Acceleration
1582 * - encoding: forbidden
1583 * - decoding: set by decoder
1584 */
1585 int xvmc_acceleration;
1586
1587 /**
1588 * macroblock decision mode
1589 * - encoding: set by user.
1590 * - decoding: unused
1591 */
1592 int mb_decision;
1593 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1594 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1595 #define FF_MB_DECISION_RD 2 ///< rate distoration
1596
1597 /**
1598 * custom intra quantization matrix
1599 * - encoding: set by user, can be NULL
1600 * - decoding: set by lavc
1601 */
1602 uint16_t *intra_matrix;
1603
1604 /**
1605 * custom inter quantization matrix
1606 * - encoding: set by user, can be NULL
1607 * - decoding: set by lavc
1608 */
1609 uint16_t *inter_matrix;
1610
1611 /**
1612 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1613 * this is used to workaround some encoder bugs
1614 * - encoding: unused
1615 * - decoding: set by user, will be converted to upper case by lavc during init
1616 */
1617 unsigned int stream_codec_tag;
1618
1619 /**
1620 * scene change detection threshold.
1621 * 0 is default, larger means fewer detected scene changes
1622 * - encoding: set by user.
1623 * - decoding: unused
1624 */
1625 int scenechange_threshold;
1626
1627 /**
1628 * minimum lagrange multipler
1629 * - encoding: set by user.
1630 * - decoding: unused
1631 */
1632 int lmin;
1633
1634 /**
1635 * maximum lagrange multipler
1636 * - encoding: set by user.
1637 * - decoding: unused
1638 */
1639 int lmax;
1640
1641 /**
1642 * Palette control structure
1643 * - encoding: ??? (no palette-enabled encoder yet)
1644 * - decoding: set by user.
1645 */
1646 struct AVPaletteControl *palctrl;
1647
1648 /**
1649 * noise reduction strength
1650 * - encoding: set by user.
1651 * - decoding: unused
1652 */
1653 int noise_reduction;
1654
1655 /**
1656 * called at the beginning of a frame to get cr buffer for it.
1657 * buffer type (size, hints) must be the same. lavc won't check it.
1658 * lavc will pass previous buffer in pic, function should return
1659 * same buffer or new buffer with old frame "painted" into it.
1660 * if pic.data[0] == NULL must behave like get_buffer().
1661 * - encoding: unused
1662 * - decoding: set by lavc, user can override
1663 */
1664 int (*reget_buffer)(struct AVCodecContext *c, AVFrame *pic);
1665
1666 /**
1667 * number of bits which should be loaded into the rc buffer before decoding starts
1668 * - encoding: set by user.
1669 * - decoding: unused
1670 */
1671 int rc_initial_buffer_occupancy;
1672
1673 /**
1674 *
1675 * - encoding: set by user.
1676 * - decoding: unused
1677 */
1678 int inter_threshold;
1679
1680 /**
1681 * CODEC_FLAG2_*.
1682 * - encoding: set by user.
1683 * - decoding: set by user.
1684 */
1685 int flags2;
1686
1687 /**
1688 * simulates errors in the bitstream to test error concealment.
1689 * - encoding: set by user.
1690 * - decoding: unused.
1691 */
1692 int error_rate;
1693
1694 /**
1695 * MP3 antialias algorithm, see FF_AA_* below.
1696 * - encoding: unused
1697 * - decoding: set by user
1698 */
1699 int antialias_algo;
1700 #define FF_AA_AUTO 0
1701 #define FF_AA_FASTINT 1 //not implemented yet
1702 #define FF_AA_INT 2
1703 #define FF_AA_FLOAT 3
1704 /**
1705 * Quantizer noise shaping.
1706 * - encoding: set by user
1707 * - decoding: unused
1708 */
1709 int quantizer_noise_shaping;
1710
1711 /**
1712 * Thread count.
1713 * is used to decide how many independant tasks should be passed to execute()
1714 * - encoding: set by user
1715 * - decoding: set by user
1716 */
1717 int thread_count;
1718
1719 /**
1720 * the codec may call this to execute several independant things. it will return only after
1721 * finishing all tasks, the user may replace this with some multithreaded implementation, the
1722 * default implementation will execute the parts serially
1723 * @param count the number of things to execute
1724 * - encoding: set by lavc, user can override
1725 * - decoding: set by lavc, user can override
1726 */
1727 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void **arg2, int *ret, int count);
1728
1729 /**
1730 * Thread opaque.
1731 * can be used by execute() to store some per AVCodecContext stuff.
1732 * - encoding: set by execute()
1733 * - decoding: set by execute()
1734 */
1735 void *thread_opaque;
1736
1737 /**
1738 * Motion estimation threshold. under which no motion estimation is
1739 * performed, but instead the user specified motion vectors are used
1740 *
1741 * - encoding: set by user
1742 * - decoding: unused
1743 */
1744 int me_threshold;
1745
1746 /**
1747 * Macroblock threshold. under which the user specified macroblock types will be used
1748 * - encoding: set by user
1749 * - decoding: unused
1750 */
1751 int mb_threshold;
1752
1753 /**
1754 * precision of the intra dc coefficient - 8.
1755 * - encoding: set by user
1756 * - decoding: unused
1757 */
1758 int intra_dc_precision;
1759
1760 /**
1761 * noise vs. sse weight for the nsse comparsion function.
1762 * - encoding: set by user
1763 * - decoding: unused
1764 */
1765 int nsse_weight;
1766
1767 /**
1768 * number of macroblock rows at the top which are skipped.
1769 * - encoding: unused
1770 * - decoding: set by user
1771 */
1772 int skip_top;
1773
1774 /**
1775 * number of macroblock rows at the bottom which are skipped.
1776 * - encoding: unused
1777 * - decoding: set by user
1778 */
1779 int skip_bottom;
1780
1781 /**
1782 * profile
1783 * - encoding: set by user
1784 * - decoding: set by lavc
1785 */
1786 int profile;
1787 #define FF_PROFILE_UNKNOWN -99
1788
1789 /**
1790 * level
1791 * - encoding: set by user
1792 * - decoding: set by lavc
1793 */
1794 int level;
1795 #define FF_LEVEL_UNKNOWN -99
1796
1797 /**
1798 * low resolution decoding. 1-> 1/2 size, 2->1/4 size
1799 * - encoding: unused
1800 * - decoding: set by user
1801 */
1802 int lowres;
1803
1804 /**
1805 * bitsream width / height. may be different from width/height if lowres
1806 * or other things are used
1807 * - encoding: unused
1808 * - decoding: set by user before init if known, codec should override / dynamically change if needed
1809 */
1810 int coded_width, coded_height;
1811
1812 /**
1813 * frame skip threshold
1814 * - encoding: set by user
1815 * - decoding: unused
1816 */
1817 int frame_skip_threshold;
1818
1819 /**
1820 * frame skip factor
1821 * - encoding: set by user
1822 * - decoding: unused
1823 */
1824 int frame_skip_factor;
1825
1826 /**
1827 * frame skip exponent
1828 * - encoding: set by user
1829 * - decoding: unused
1830 */
1831 int frame_skip_exp;
1832
1833 /**
1834 * frame skip comparission function
1835 * - encoding: set by user.
1836 * - decoding: unused
1837 */
1838 int frame_skip_cmp;
1839
1840 /**
1841 * border processing masking. raises the quantizer for mbs on the borders
1842 * of the picture.
1843 * - encoding: set by user
1844 * - decoding: unused
1845 */
1846 float border_masking;
1847
1848 /**
1849 * minimum MB lagrange multipler.
1850 * - encoding: set by user.
1851 * - decoding: unused
1852 */
1853 int mb_lmin;
1854
1855 /**
1856 * maximum MB lagrange multipler.
1857 * - encoding: set by user.
1858 * - decoding: unused
1859 */
1860 int mb_lmax;
1861
1862 /**
1863 *
1864 * - encoding: set by user.
1865 * - decoding: unused
1866 */
1867 int me_penalty_compensation;
1868
1869 /**
1870 *
1871 * - encoding: unused
1872 * - decoding: set by user.
1873 */
1874 enum AVDiscard skip_loop_filter;
1875
1876 /**
1877 *
1878 * - encoding: unused
1879 * - decoding: set by user.
1880 */
1881 enum AVDiscard skip_idct;
1882
1883 /**
1884 *
1885 * - encoding: unused
1886 * - decoding: set by user.
1887 */
1888 enum AVDiscard skip_frame;
1889
1890 /**
1891 *
1892 * - encoding: set by user.
1893 * - decoding: unused
1894 */
1895 int bidir_refine;
1896
1897 /**
1898 *
1899 * - encoding: set by user.
1900 * - decoding: unused
1901 */
1902 int brd_scale;
1903
1904 /**
1905 * constant rate factor - quality-based VBR - values ~correspond to qps
1906 * - encoding: set by user.
1907 * - decoding: unused
1908 */
1909 int crf;
1910
1911 /**
1912 * constant quantization parameter rate control method
1913 * - encoding: set by user.
1914 * - decoding: unused
1915 */
1916 int cqp;
1917
1918 /**
1919 * minimum gop size
1920 * - encoding: set by user.
1921 * - decoding: unused
1922 */
1923 int keyint_min;
1924
1925 /**
1926 * number of reference frames
1927 * - encoding: set by user.
1928 * - decoding: unused
1929 */
1930 int refs;
1931
1932 /**
1933 * chroma qp offset from luma
1934 * - encoding: set by user.
1935 * - decoding: unused
1936 */
1937 int chromaoffset;
1938
1939 /**
1940 * influences how often b-frames are used
1941 * - encoding: set by user.
1942 * - decoding: unused
1943 */
1944 int bframebias;
1945
1946 /**
1947 * trellis RD quantization
1948 * - encoding: set by user.
1949 * - decoding: unused
1950 */
1951 int trellis;
1952
1953 /**
1954 * reduce fluctuations in qp (before curve compression)
1955 * - encoding: set by user.
1956 * - decoding: unused
1957 */
1958 float complexityblur;
1959
1960 /**
1961 * in-loop deblocking filter alphac0 parameter
1962 * alpha is in the range -6...6
1963 * - encoding: set by user.
1964 * - decoding: unused
1965 */
1966 int deblockalpha;
1967
1968 /**
1969 * in-loop deblocking filter beta parameter
1970 * beta is in the range -6...6
1971 * - encoding: set by user.
1972 * - decoding: unused
1973 */
1974 int deblockbeta;
1975
1976 /**
1977 * macroblock subpartition sizes to consider - p8x8, p4x4, b8x8, i8x8, i4x4
1978 * - encoding: set by user.
1979 * - decoding: unused
1980 */
1981 int partitions;
1982 #define X264_PART_I4X4 0x001 /* Analyse i4x4 */
1983 #define X264_PART_I8X8 0x002 /* Analyse i8x8 (requires 8x8 transform) */
1984 #define X264_PART_P8X8 0x010 /* Analyse p16x8, p8x16 and p8x8 */
1985 #define X264_PART_P4X4 0x020 /* Analyse p8x4, p4x8, p4x4 */
1986 #define X264_PART_B8X8 0x100 /* Analyse b16x8, b8x16 and b8x8 */
1987
1988 /**
1989 * direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
1990 * - encoding: set by user.
1991 * - decoding: unused
1992 */
1993 int directpred;
1994
1995 /**
1996 * audio cutoff bandwidth (0 means "automatic") . Currently used only by FAAC
1997 * - encoding: set by user.
1998 * - decoding: unused
1999 */
2000 int cutoff;
2001
2002 /**
2003 * multiplied by qscale for each frame and added to scene_change_score
2004 * - encoding: set by user.
2005 * - decoding: unused
2006 */
2007 int scenechange_factor;
2008 } AVCodecContext;
2009
2010 /**
2011 * AVCodec.
2012 */
2013 typedef struct AVCodec {
2014 const char *name;
2015 enum CodecType type;
2016 enum CodecID id;
2017 int priv_data_size;
2018 int (*init)(AVCodecContext *);
2019 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
2020 int (*close)(AVCodecContext *);
2021 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
2022 uint8_t *buf, int buf_size);
2023 int capabilities;
2024 #if LIBAVCODEC_VERSION_INT < ((50<<16)+(0<<8)+0)
2025 void *dummy; // FIXME remove next time we break binary compatibility
2026 #endif
2027 struct AVCodec *next;
2028 void (*flush)(AVCodecContext *);
2029 const AVRational *supported_framerates; ///array of supported framerates, or NULL if any, array is terminated by {0,0}
2030 const enum PixelFormat *pix_fmts; ///array of supported pixel formats, or NULL if unknown, array is terminanted by -1
2031 } AVCodec;
2032
2033 /**
2034 * four components are given, that's all.
2035 * the last component is alpha
2036 */
2037 typedef struct AVPicture {
2038 uint8_t *data[4];
2039 int linesize[4]; ///< number of bytes per line
2040 } AVPicture;
2041
2042 /**
2043 * AVPaletteControl
2044 * This structure defines a method for communicating palette changes
2045 * between and demuxer and a decoder.
2046 */
2047 #define AVPALETTE_SIZE 1024
2048 #define AVPALETTE_COUNT 256
2049 typedef struct AVPaletteControl {
2050
2051 /* demuxer sets this to 1 to indicate the palette has changed;
2052 * decoder resets to 0 */
2053 int palette_changed;
2054
2055 /* 4-byte ARGB palette entries, stored in native byte order; note that
2056 * the individual palette components should be on a 8-bit scale; if
2057 * the palette data comes from a IBM VGA native format, the component
2058 * data is probably 6 bits in size and needs to be scaled */
2059 unsigned int palette[AVPALETTE_COUNT];
2060
2061 } AVPaletteControl;
2062
2063 typedef struct AVSubtitleRect {
2064 uint16_t x;
2065 uint16_t y;
2066 uint16_t w;
2067 uint16_t h;
2068 uint16_t nb_colors;
2069 int linesize;
2070 uint32_t *rgba_palette;
2071 uint8_t *bitmap;
2072 } AVSubtitleRect;
2073
2074 typedef struct AVSubtitle {
2075 uint16_t format; /* 0 = graphics */
2076 uint32_t start_display_time; /* relative to packet pts, in ms */
2077 uint32_t end_display_time; /* relative to packet pts, in ms */
2078 uint32_t num_rects;
2079 AVSubtitleRect *rects;
2080 } AVSubtitle;
2081
2082 extern AVCodec ac3_encoder;
2083 extern AVCodec mp2_encoder;
2084 extern AVCodec mp3lame_encoder;
2085 extern AVCodec oggvorbis_encoder;
2086 extern AVCodec oggtheora_encoder;
2087 extern AVCodec faac_encoder;
2088 extern AVCodec xvid_encoder;
2089 extern AVCodec mpeg1video_encoder;
2090 extern AVCodec mpeg2video_encoder;
2091 extern AVCodec h261_encoder;
2092 extern AVCodec h263_encoder;
2093 extern AVCodec h263p_encoder;
2094 extern AVCodec flv_encoder;
2095 extern AVCodec rv10_encoder;
2096 extern AVCodec rv20_encoder;
2097 extern AVCodec dvvideo_encoder;
2098 extern AVCodec mjpeg_encoder;
2099 extern AVCodec ljpeg_encoder;
2100 extern AVCodec jpegls_encoder;
2101 extern AVCodec png_encoder;
2102 extern AVCodec ppm_encoder;
2103 extern AVCodec pgm_encoder;
2104 extern AVCodec pgmyuv_encoder;
2105 extern AVCodec pbm_encoder;
2106 extern AVCodec pam_encoder;
2107 extern AVCodec mpeg4_encoder;
2108 extern AVCodec msmpeg4v1_encoder;
2109 extern AVCodec msmpeg4v2_encoder;
2110 extern AVCodec msmpeg4v3_encoder;
2111 extern AVCodec wmv1_encoder;
2112 extern AVCodec wmv2_encoder;
2113 extern AVCodec huffyuv_encoder;
2114 extern AVCodec ffvhuff_encoder;
2115 extern AVCodec h264_encoder;
2116 extern AVCodec asv1_encoder;
2117 extern AVCodec asv2_encoder;
2118 extern AVCodec vcr1_encoder;
2119 extern AVCodec ffv1_encoder;
2120 extern AVCodec snow_encoder;
2121 extern AVCodec mdec_encoder;
2122 extern AVCodec zlib_encoder;
2123 extern AVCodec sonic_encoder;
2124 extern AVCodec sonic_ls_encoder;
2125 extern AVCodec svq1_encoder;
2126 extern AVCodec x264_encoder;
2127
2128 extern AVCodec h263_decoder;
2129 extern AVCodec h261_decoder;
2130 extern AVCodec mpeg4_decoder;
2131 extern AVCodec msmpeg4v1_decoder;
2132 extern AVCodec msmpeg4v2_decoder;
2133 extern AVCodec msmpeg4v3_decoder;
2134 extern AVCodec wmv1_decoder;
2135 extern AVCodec wmv2_decoder;
2136 extern AVCodec vc9_decoder;
2137 extern AVCodec wmv3_decoder;
2138 extern AVCodec mpeg1video_decoder;
2139 extern AVCodec mpeg2video_decoder;
2140 extern AVCodec mpegvideo_decoder;
2141 extern AVCodec mpeg_xvmc_decoder;
2142 extern AVCodec h263i_decoder;
2143 extern AVCodec flv_decoder;
2144 extern AVCodec rv10_decoder;
2145 extern AVCodec rv20_decoder;
2146 extern AVCodec rv30_decoder;
2147 extern AVCodec rv40_decoder;
2148 extern AVCodec svq1_decoder;
2149 extern AVCodec svq3_decoder;
2150 extern AVCodec dvvideo_decoder;
2151 extern AVCodec wmav1_decoder;
2152 extern AVCodec wmav2_decoder;
2153 extern AVCodec mjpeg_decoder;
2154 extern AVCodec mjpegb_decoder;
2155 extern AVCodec sp5x_decoder;
2156 extern AVCodec png_decoder;
2157 extern AVCodec mp2_decoder;
2158 extern AVCodec mp3_decoder;
2159 extern AVCodec mp3adu_decoder;
2160 extern AVCodec mp3on4_decoder;
2161 extern AVCodec qdm2_decoder;
2162 extern AVCodec cook_decoder;
2163 extern AVCodec truespeech_decoder;
2164 extern AVCodec tta_decoder;
2165 extern AVCodec mace3_decoder;
2166 extern AVCodec mace6_decoder;
2167 extern AVCodec huffyuv_decoder;
2168 extern AVCodec ffvhuff_decoder;
2169 extern AVCodec oggvorbis_decoder;
2170 extern AVCodec oggtheora_decoder;
2171 extern AVCodec cyuv_decoder;
2172 extern AVCodec h264_decoder;
2173 extern AVCodec indeo3_decoder;
2174 extern AVCodec vp3_decoder;
2175 extern AVCodec theora_decoder;
2176 extern AVCodec amr_nb_decoder;
2177 extern AVCodec amr_nb_encoder;
2178 extern AVCodec amr_wb_encoder;
2179 extern AVCodec amr_wb_decoder;
2180 extern AVCodec aac_decoder;
2181 extern AVCodec mpeg4aac_decoder;
2182 extern AVCodec asv1_decoder;
2183 extern AVCodec asv2_decoder;
2184 extern AVCodec vcr1_decoder;
2185 extern AVCodec cljr_decoder;
2186 extern AVCodec ffv1_decoder;
2187 extern AVCodec snow_decoder;
2188 extern AVCodec fourxm_decoder;
2189 extern AVCodec mdec_decoder;
2190 extern AVCodec roq_decoder;
2191 extern AVCodec interplay_video_decoder;
2192 extern AVCodec xan_wc3_decoder;
2193 extern AVCodec rpza_decoder;
2194 extern AVCodec cinepak_decoder;
2195 extern AVCodec msrle_decoder;
2196 extern AVCodec msvideo1_decoder;
2197 extern AVCodec vqa_decoder;
2198 extern AVCodec idcin_decoder;
2199 extern AVCodec eightbps_decoder;
2200 extern AVCodec smc_decoder;
2201 extern AVCodec flic_decoder;
2202 extern AVCodec vmdvideo_decoder;
2203 extern AVCodec vmdaudio_decoder;
2204 extern AVCodec truemotion1_decoder;
2205 extern AVCodec truemotion2_decoder;
2206 extern AVCodec mszh_decoder;
2207 extern AVCodec zlib_decoder;
2208 extern AVCodec ra_144_decoder;
2209 extern AVCodec ra_288_decoder;
2210 extern AVCodec roq_dpcm_decoder;
2211 extern AVCodec interplay_dpcm_decoder;
2212 extern AVCodec xan_dpcm_decoder;
2213 extern AVCodec sol_dpcm_decoder;
2214 extern AVCodec sonic_decoder;
2215 extern AVCodec qtrle_decoder;
2216 extern AVCodec flac_decoder;
2217 extern AVCodec tscc_decoder;
2218 extern AVCodec cscd_decoder;
2219 extern AVCodec ulti_decoder;
2220 extern AVCodec qdraw_decoder;
2221 extern AVCodec xl_decoder;
2222 extern AVCodec qpeg_decoder;
2223 extern AVCodec shorten_decoder;
2224 extern AVCodec loco_decoder;
2225 extern AVCodec wnv1_decoder;
2226 extern AVCodec aasc_decoder;
2227 extern AVCodec alac_decoder;
2228 extern AVCodec ws_snd1_decoder;
2229 extern AVCodec indeo2_decoder;
2230 extern AVCodec vorbis_decoder;
2231 extern AVCodec fraps_decoder;
2232 extern AVCodec libgsm_encoder;
2233 extern AVCodec libgsm_decoder;
2234 extern AVCodec bmp_decoder;
2235 extern AVCodec mmvideo_decoder;
2236 extern AVCodec zmbv_decoder;
2237 extern AVCodec avs_decoder;
2238
2239 /* pcm codecs */
2240 #define PCM_CODEC(id, name) \
2241 extern AVCodec name ## _decoder; \
2242 extern AVCodec name ## _encoder
2243
2244 PCM_CODEC(CODEC_ID_PCM_S32LE, pcm_s32le);
2245 PCM_CODEC(CODEC_ID_PCM_S32BE, pcm_s32be);
2246 PCM_CODEC(CODEC_ID_PCM_U32LE, pcm_u32le);
2247 PCM_CODEC(CODEC_ID_PCM_U32BE, pcm_u32be);
2248 PCM_CODEC(CODEC_ID_PCM_S24LE, pcm_s24le);
2249 PCM_CODEC(CODEC_ID_PCM_S24BE, pcm_s24be);
2250 PCM_CODEC(CODEC_ID_PCM_U24LE, pcm_u24le);
2251 PCM_CODEC(CODEC_ID_PCM_U24BE, pcm_u24be);
2252 PCM_CODEC(CODEC_ID_PCM_S24DAUD, pcm_s24daud);
2253 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
2254 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
2255 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
2256 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
2257 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
2258 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
2259 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
2260 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
2261
2262 /* adpcm codecs */
2263
2264 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
2265 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
2266 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
2267 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
2268 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
2269 PCM_CODEC(CODEC_ID_ADPCM_SMJPEG, adpcm_ima_smjpeg);
2270 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
2271 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
2272 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
2273 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
2274 PCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
2275 PCM_CODEC(CODEC_ID_ADPCM_G726, adpcm_g726);
2276 PCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
2277 PCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
2278 PCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
2279 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
2280 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
2281 PCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
2282
2283 #undef PCM_CODEC
2284
2285 /* dummy raw video codec */
2286 extern AVCodec rawvideo_encoder;
2287 extern AVCodec rawvideo_decoder;
2288
2289 /* the following codecs use external GPL libs */
2290 extern AVCodec ac3_decoder;
2291 extern AVCodec dts_decoder;
2292
2293 /* subtitles */
2294 extern AVCodec dvdsub_encoder;
2295 extern AVCodec dvdsub_decoder;
2296 extern AVCodec dvbsub_encoder;
2297 extern AVCodec dvbsub_decoder;
2298
2299 /* resample.c */
2300
2301 struct ReSampleContext;
2302 struct AVResampleContext;
2303
2304 typedef struct ReSampleContext ReSampleContext;
2305
2306 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
2307 int output_rate, int input_rate);
2308 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
2309 void audio_resample_close(ReSampleContext *s);
2310
2311 struct AVResampleContext *av_resample_init(int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff);
2312 int av_resample(struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx);
2313 void av_resample_compensate(struct AVResampleContext *c, int sample_delta, int compensation_distance);
2314 void av_resample_close(struct AVResampleContext *c);
2315
2316 /* YUV420 format is assumed ! */
2317
2318 struct ImgReSampleContext;
2319
2320 typedef struct ImgReSampleContext ImgReSampleContext;
2321
2322 ImgReSampleContext *img_resample_init(int output_width, int output_height,
2323 int input_width, int input_height);
2324
2325 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
2326 int iwidth, int iheight,
2327 int topBand, int bottomBand,
2328 int leftBand, int rightBand,
2329 int padtop, int padbottom,
2330 int padleft, int padright);
2331
2332
2333 void img_resample(ImgReSampleContext *s,
2334 AVPicture *output, const AVPicture *input);
2335
2336 void img_resample_close(ImgReSampleContext *s);
2337
2338 /**
2339 * Allocate memory for a picture. Call avpicture_free to free it.
2340 *
2341 * @param picture the picture to be filled in.
2342 * @param pix_fmt the format of the picture.
2343 * @param width the width of the picture.
2344 * @param height the height of the picture.
2345 * @return 0 if successful, -1 if not.
2346 */
2347 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
2348
2349 /* Free a picture previously allocated by avpicture_alloc. */
2350 void avpicture_free(AVPicture *picture);
2351
2352 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
2353 int pix_fmt, int width, int height);
2354 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
2355 unsigned char *dest, int dest_size);
2356 int avpicture_get_size(int pix_fmt, int width, int height);
2357 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
2358 const char *avcodec_get_pix_fmt_name(int pix_fmt);
2359 void avcodec_set_dimensions(AVCodecContext *s, int width, int height);
2360 enum PixelFormat avcodec_get_pix_fmt(const char* name);
2361 unsigned int avcodec_pix_fmt_to_codec_tag(enum PixelFormat p);
2362
2363 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
2364 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
2365 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
2366 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
2367 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
2368 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
2369
2370 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
2371 int has_alpha);
2372 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
2373 int has_alpha, int *loss_ptr);
2374
2375 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
2376 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
2377 int img_get_alpha_info(const AVPicture *src,
2378 int pix_fmt, int width, int height);
2379
2380 /* convert among pixel formats */
2381 int img_convert(AVPicture *dst, int dst_pix_fmt,
2382 const AVPicture *src, int pix_fmt,
2383 int width, int height);
2384
2385 /* deinterlace a picture */
2386 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
2387 int pix_fmt, int width, int height);
2388
2389 /* external high level API */
2390
2391 extern AVCodec *first_avcodec;
2392
2393 /* returns LIBAVCODEC_VERSION_INT constant */
2394 unsigned avcodec_version(void);
2395 /* returns LIBAVCODEC_BUILD constant */
2396 unsigned avcodec_build(void);
2397 void avcodec_init(void);
2398
2399 void register_avcodec(AVCodec *format);
2400 AVCodec *avcodec_find_encoder(enum CodecID id);
2401 AVCodec *avcodec_find_encoder_by_name(const char *name);
2402 AVCodec *avcodec_find_decoder(enum CodecID id);
2403 AVCodec *avcodec_find_decoder_by_name(const char *name);
2404 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
2405
2406 void avcodec_get_context_defaults(AVCodecContext *s);
2407 AVCodecContext *avcodec_alloc_context(void);
2408 void avcodec_get_frame_defaults(AVFrame *pic);
2409 AVFrame *avcodec_alloc_frame(void);
2410
2411 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
2412 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
2413 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic);
2414 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height);
2415 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h);
2416 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt);
2417
2418 int avcodec_thread_init(AVCodecContext *s, int thread_count);
2419 void avcodec_thread_free(AVCodecContext *s);
2420 int avcodec_thread_execute(AVCodecContext *s, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2421 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count);
2422 //FIXME func typedef
2423
2424 /**
2425 * opens / inits the AVCodecContext.
2426 * not thread save!
2427 */
2428 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
2429
2430 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
2431 int *frame_size_ptr,
2432 uint8_t *buf, int buf_size);
2433 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
2434 int *got_picture_ptr,
2435 uint8_t *buf, int buf_size);
2436 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
2437 int *got_sub_ptr,
2438 const uint8_t *buf, int buf_size);
2439 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
2440 int *data_size_ptr,
2441 uint8_t *buf, int buf_size);
2442 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2443 const short *samples);
2444 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2445 const AVFrame *pict);
2446 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
2447 const AVSubtitle *sub);
2448
2449 int avcodec_close(AVCodecContext *avctx);
2450
2451 void avcodec_register_all(void);
2452
2453 void avcodec_flush_buffers(AVCodecContext *avctx);
2454
2455 void avcodec_default_free_buffers(AVCodecContext *s);
2456
2457 /* misc usefull functions */
2458
2459 /**
2460 * returns a single letter to describe the picture type
2461 */
2462 char av_get_pict_type_char(int pict_type);
2463
2464
2465 /* frame parsing */
2466 typedef struct AVCodecParserContext {
2467 void *priv_data;
2468 struct AVCodecParser *parser;
2469 int64_t frame_offset; /* offset of the current frame */
2470 int64_t cur_offset; /* current offset
2471 (incremented by each av_parser_parse()) */
2472 int64_t last_frame_offset; /* offset of the last frame */
2473 /* video info */
2474 int pict_type; /* XXX: put it back in AVCodecContext */
2475 int repeat_pict; /* XXX: put it back in AVCodecContext */
2476 int64_t pts; /* pts of the current frame */
2477 int64_t dts; /* dts of the current frame */
2478
2479 /* private data */
2480 int64_t last_pts;
2481 int64_t last_dts;
2482 int fetch_timestamp;
2483
2484 #define AV_PARSER_PTS_NB 4
2485 int cur_frame_start_index;
2486 int64_t cur_frame_offset[AV_PARSER_PTS_NB];
2487 int64_t cur_frame_pts[AV_PARSER_PTS_NB];
2488 int64_t cur_frame_dts[AV_PARSER_PTS_NB];
2489
2490 int flags;
2491 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
2492 } AVCodecParserContext;
2493
2494 typedef struct AVCodecParser {
2495 int codec_ids[5]; /* several codec IDs are permitted */
2496 int priv_data_size;
2497 int (*parser_init)(AVCodecParserContext *s);
2498 int (*parser_parse)(AVCodecParserContext *s,
2499 AVCodecContext *avctx,
2500 uint8_t **poutbuf, int *poutbuf_size,
2501 const uint8_t *buf, int buf_size);
2502 void (*parser_close)(AVCodecParserContext *s);
2503 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
2504 struct AVCodecParser *next;
2505 } AVCodecParser;
2506
2507 extern AVCodecParser *av_first_parser;
2508
2509 void av_register_codec_parser(AVCodecParser *parser);
2510 AVCodecParserContext *av_parser_init(int codec_id);
2511 int av_parser_parse(AVCodecParserContext *s,
2512 AVCodecContext *avctx,
2513 uint8_t **poutbuf, int *poutbuf_size,
2514 const uint8_t *buf, int buf_size,
2515 int64_t pts, int64_t dts);
2516 int av_parser_change(AVCodecParserContext *s,
2517 AVCodecContext *avctx,
2518 uint8_t **poutbuf, int *poutbuf_size,
2519 const uint8_t *buf, int buf_size, int keyframe);
2520 void av_parser_close(AVCodecParserContext *s);
2521
2522 extern AVCodecParser mpegvideo_parser;
2523 extern AVCodecParser mpeg4video_parser;
2524 extern AVCodecParser h261_parser;
2525 extern AVCodecParser h263_parser;
2526 extern AVCodecParser h264_parser;
2527 extern AVCodecParser mjpeg_parser;
2528 extern AVCodecParser pnm_parser;
2529 extern AVCodecParser mpegaudio_parser;
2530 extern AVCodecParser ac3_parser;
2531 extern AVCodecParser dvdsub_parser;
2532 extern AVCodecParser dvbsub_parser;
2533 extern AVCodecParser aac_parser;
2534
2535 /* memory */
2536 void *av_malloc(unsigned int size);
2537 void *av_mallocz(unsigned int size);
2538 void *av_realloc(void *ptr, unsigned int size);
2539 void av_free(void *ptr);
2540 char *av_strdup(const char *s);
2541 void av_freep(void *ptr);
2542 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
2543 /* for static data only */
2544 /* call av_free_static to release all staticaly allocated tables */
2545 void av_free_static(void);
2546 void *av_mallocz_static(unsigned int size);
2547 void *av_realloc_static(void *ptr, unsigned int size);
2548
2549 /* add by bero : in adx.c */
2550 int is_adx(const unsigned char *buf,size_t bufsize);
2551
2552 void img_copy(AVPicture *dst, const AVPicture *src,
2553 int pix_fmt, int width, int height);
2554
2555 /* av_log API */
2556
2557 #include <stdarg.h>
2558
2559 #define AV_LOG_QUIET -1
2560 #define AV_LOG_ERROR 0
2561 #define AV_LOG_INFO 1
2562 #define AV_LOG_DEBUG 2
2563
2564 #ifdef __GNUC__
2565 extern void av_log(void*, int level, const char *fmt, ...) __attribute__ ((__format__ (__printf__, 3, 4)));
2566 #else
2567 extern void av_log(void*, int level, const char *fmt, ...);
2568 #endif
2569
2570 extern void av_vlog(void*, int level, const char *fmt, va_list);
2571 extern int av_log_get_level(void);
2572 extern void av_log_set_level(int);
2573 extern void av_log_set_callback(void (*)(void*, int, const char*, va_list));
2574
2575 /* endian macros */
2576 #if !defined(BE_16) || !defined(BE_32) || !defined(LE_16) || !defined(LE_32)
2577 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
2578 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
2579 (((uint8_t*)(x))[1] << 16) | \
2580 (((uint8_t*)(x))[2] << 8) | \
2581 ((uint8_t*)(x))[3])
2582 #define LE_16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
2583 #define LE_32(x) ((((uint8_t*)(x))[3] << 24) | \
2584 (((uint8_t*)(x))[2] << 16) | \
2585 (((uint8_t*)(x))[1] << 8) | \
2586 ((uint8_t*)(x))[0])
2587 #endif
2588
2589 extern unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
2590
2591 #ifdef __cplusplus
2592 }
2593 #endif
2594
2595 #endif /* AVCODEC_H */