ad19cdcd556c7f4933500cefa75efa65fc06f8dc
[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
16 #define FFMPEG_VERSION_INT 0x000408
17 #define FFMPEG_VERSION "0.4.8"
18 #define LIBAVCODEC_BUILD 4681
19
20 #define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
21 #define LIBAVCODEC_VERSION FFMPEG_VERSION
22
23 #define AV_STRINGIFY(s) AV_TOSTRING(s)
24 #define AV_TOSTRING(s) #s
25 #define LIBAVCODEC_IDENT "FFmpeg" LIBAVCODEC_VERSION "b" AV_STRINGIFY(LIBAVCODEC_BUILD)
26
27 enum CodecID {
28 CODEC_ID_NONE,
29 CODEC_ID_MPEG1VIDEO,
30 CODEC_ID_MPEG2VIDEO, /* prefered ID for MPEG Video 1 or 2 decoding */
31 CODEC_ID_MPEG2VIDEO_XVMC,
32 CODEC_ID_H263,
33 CODEC_ID_RV10,
34 CODEC_ID_MP2,
35 CODEC_ID_MP3, /* prefered ID for MPEG Audio layer 1, 2 or3 decoding */
36 CODEC_ID_VORBIS,
37 CODEC_ID_AC3,
38 CODEC_ID_MJPEG,
39 CODEC_ID_MJPEGB,
40 CODEC_ID_LJPEG,
41 CODEC_ID_MPEG4,
42 CODEC_ID_RAWVIDEO,
43 CODEC_ID_MSMPEG4V1,
44 CODEC_ID_MSMPEG4V2,
45 CODEC_ID_MSMPEG4V3,
46 CODEC_ID_WMV1,
47 CODEC_ID_WMV2,
48 CODEC_ID_H263P,
49 CODEC_ID_H263I,
50 CODEC_ID_FLV1,
51 CODEC_ID_SVQ1,
52 CODEC_ID_SVQ3,
53 CODEC_ID_DVVIDEO,
54 CODEC_ID_DVAUDIO,
55 CODEC_ID_WMAV1,
56 CODEC_ID_WMAV2,
57 CODEC_ID_MACE3,
58 CODEC_ID_MACE6,
59 CODEC_ID_HUFFYUV,
60 CODEC_ID_CYUV,
61 CODEC_ID_H264,
62 CODEC_ID_INDEO3,
63 CODEC_ID_VP3,
64 CODEC_ID_AAC,
65 CODEC_ID_MPEG4AAC,
66 CODEC_ID_ASV1,
67 CODEC_ID_ASV2,
68 CODEC_ID_FFV1,
69 CODEC_ID_4XM,
70 CODEC_ID_VCR1,
71 CODEC_ID_CLJR,
72 CODEC_ID_MDEC,
73 CODEC_ID_ROQ,
74 CODEC_ID_INTERPLAY_VIDEO,
75 CODEC_ID_XAN_WC3,
76 CODEC_ID_XAN_WC4,
77
78 /* various pcm "codecs" */
79 CODEC_ID_PCM_S16LE,
80 CODEC_ID_PCM_S16BE,
81 CODEC_ID_PCM_U16LE,
82 CODEC_ID_PCM_U16BE,
83 CODEC_ID_PCM_S8,
84 CODEC_ID_PCM_U8,
85 CODEC_ID_PCM_MULAW,
86 CODEC_ID_PCM_ALAW,
87
88 /* various adpcm codecs */
89 CODEC_ID_ADPCM_IMA_QT,
90 CODEC_ID_ADPCM_IMA_WAV,
91 CODEC_ID_ADPCM_IMA_DK3,
92 CODEC_ID_ADPCM_IMA_DK4,
93 CODEC_ID_ADPCM_MS,
94 CODEC_ID_ADPCM_4XM,
95
96 /* AMR */
97 CODEC_ID_AMR_NB,
98 CODEC_ID_AMR_WB,
99
100 /* RealAudio codecs*/
101 CODEC_ID_RA_144,
102 CODEC_ID_RA_288,
103
104 /* various DPCM codecs */
105 CODEC_ID_ROQ_DPCM,
106 CODEC_ID_INTERPLAY_DPCM,
107 CODEC_ID_XAN_DPCM,
108 };
109
110 /* CODEC_ID_MP3LAME is absolete */
111 #define CODEC_ID_MP3LAME CODEC_ID_MP3
112
113 enum CodecType {
114 CODEC_TYPE_UNKNOWN = -1,
115 CODEC_TYPE_VIDEO,
116 CODEC_TYPE_AUDIO,
117 };
118
119 /**
120 * Pixel format. Notes:
121 *
122 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
123 * color is put together as:
124 * (A << 24) | (R << 16) | (G << 8) | B
125 * This is stored as BGRA on little endian CPU architectures and ARGB on
126 * big endian CPUs.
127 *
128 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
129 * image data is stored in AVFrame.data[0]. The palette is transported in
130 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
131 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
132 * also endian-specific).
133 */
134 enum PixelFormat {
135 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
136 PIX_FMT_YUV422,
137 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
138 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
139 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
140 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
141 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
142 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
143 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
144 PIX_FMT_RGB565, ///< always stored in cpu endianness
145 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
146 PIX_FMT_GRAY8,
147 PIX_FMT_MONOWHITE, ///< 0 is white
148 PIX_FMT_MONOBLACK, ///< 0 is black
149 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
150 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
151 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
152 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
153 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
154 PIX_FMT_XVMC_MPEG2_IDCT,
155 PIX_FMT_NB,
156 };
157
158 /* currently unused, may be used if 24/32 bits samples ever supported */
159 enum SampleFormat {
160 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
161 };
162
163 /* in bytes */
164 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
165
166 /**
167 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
168 * this is mainly needed because some optimized bitstream readers read
169 * 32 or 64 bit at once and could read over the end<br>
170 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
171 * MPEG bitstreams could cause overread and segfault
172 */
173 #define FF_INPUT_BUFFER_PADDING_SIZE 8
174
175 /* motion estimation type, EPZS by default */
176 enum Motion_Est_ID {
177 ME_ZERO = 1,
178 ME_FULL,
179 ME_LOG,
180 ME_PHODS,
181 ME_EPZS,
182 ME_X1
183 };
184
185 typedef struct RcOverride{
186 int start_frame;
187 int end_frame;
188 int qscale; // if this is 0 then quality_factor will be used instead
189 float quality_factor;
190 } RcOverride;
191
192 /* only for ME compatiblity with old apps */
193 extern int motion_estimation_method;
194
195 /* ME algos sorted by quality */
196 static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
197 ME_X1, ME_EPZS, ME_FULL };
198
199
200 #define FF_MAX_B_FRAMES 8
201
202 /* encoding support
203 these flags can be passed in AVCodecContext.flags before initing
204 Note: note not everything is supported yet
205 */
206
207 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
208 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed
209 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
210 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
211 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
212 /* parent program gurantees that the input for b-frame containing streams is not written to
213 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
214 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
215 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
216 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
217 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
218 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
219 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
220 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
221 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
222 of only at frame boundaries */
223 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
224 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
225 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
226 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
227 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
228 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
229 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
230 /* Fx : Flag for h263+ extra options */
231 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< Advanced intra coding
232 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
233 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
234 /* For advanced prediction mode, we reuse the 4MV flag */
235 /* Unsupported options :
236 * Syntax Arithmetic coding (SAC)
237 * Deblocking filter internal loop
238 * Slice structured
239 * Reference Picture Selection
240 * Independant Segment Decoding
241 * Alternative Inter * VLC
242 * Modified Quantization */
243 /* /Fx */
244 /* codec capabilities */
245
246 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
247 /**
248 * Codec uses get_buffer() for allocating buffers.
249 * direct rendering method 1
250 */
251 #define CODEC_CAP_DR1 0x0002
252 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
253 used */
254 #define CODEC_CAP_PARSE_ONLY 0x0004
255 #define CODEC_CAP_TRUNCATED 0x0008
256
257 #define FF_COMMON_FRAME \
258 /**\
259 * pointer to the picture planes.\
260 * this might be different from the first allocated byte\
261 * - encoding: \
262 * - decoding: \
263 */\
264 uint8_t *data[4];\
265 int linesize[4];\
266 /**\
267 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
268 * this isnt used by lavc unless the default get/release_buffer() is used\
269 * - encoding: \
270 * - decoding: \
271 */\
272 uint8_t *base[4];\
273 /**\
274 * 1 -> keyframe, 0-> not\
275 * - encoding: set by lavc\
276 * - decoding: set by lavc\
277 */\
278 int key_frame;\
279 \
280 /**\
281 * picture type of the frame, see ?_TYPE below.\
282 * - encoding: set by lavc for coded_picture (and set by user for input)\
283 * - decoding: set by lavc\
284 */\
285 int pict_type;\
286 \
287 /**\
288 * presentation timestamp in micro seconds (time when frame should be shown to user)\
289 * if 0 then the frame_rate will be used as reference\
290 * - encoding: MUST be set by user\
291 * - decoding: set by lavc\
292 */\
293 int64_t pts;\
294 \
295 /**\
296 * picture number in bitstream order.\
297 * - encoding: set by\
298 * - decoding: set by lavc\
299 */\
300 int coded_picture_number;\
301 /**\
302 * picture number in display order.\
303 * - encoding: set by\
304 * - decoding: set by lavc\
305 */\
306 int display_picture_number;\
307 \
308 /**\
309 * quality (between 1 (good) and 31 (bad)) \
310 * - encoding: set by lavc for coded_picture (and set by user for input)\
311 * - decoding: set by lavc\
312 */\
313 float quality; \
314 \
315 /**\
316 * buffer age (1->was last buffer and dint change, 2->..., ...).\
317 * set to something large if the buffer has not been used yet \
318 * - encoding: unused\
319 * - decoding: MUST be set by get_buffer()\
320 */\
321 int age;\
322 \
323 /**\
324 * is this picture used as reference\
325 * - encoding: unused\
326 * - decoding: set by lavc (before get_buffer() call))\
327 */\
328 int reference;\
329 \
330 /**\
331 * QP table\
332 * - encoding: unused\
333 * - decoding: set by lavc\
334 */\
335 int8_t *qscale_table;\
336 /**\
337 * QP store stride\
338 * - encoding: unused\
339 * - decoding: set by lavc\
340 */\
341 int qstride;\
342 \
343 /**\
344 * mbskip_table[mb]>=1 if MB didnt change\
345 * stride= mb_width = (width+15)>>4\
346 * - encoding: unused\
347 * - decoding: set by lavc\
348 */\
349 uint8_t *mbskip_table;\
350 \
351 /**\
352 * for some private data of the user\
353 * - encoding: unused\
354 * - decoding: set by user\
355 */\
356 void *opaque;\
357 \
358 /**\
359 * error\
360 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
361 * - decoding: unused\
362 */\
363 uint64_t error[4];\
364 \
365 /**\
366 * type of the buffer (to keep track of who has to dealloc data[*])\
367 * - encoding: set by the one who allocs it\
368 * - decoding: set by the one who allocs it\
369 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
370 */\
371 int type;\
372 \
373 /**\
374 * when decoding, this signal how much the picture must be delayed.\
375 * extra_delay = repeat_pict / (2*fps)\
376 * - encoding: unused\
377 * - decoding: set by lavc\
378 */\
379 int repeat_pict;\
380 \
381 /**\
382 * \
383 */\
384 int qscale_type;\
385
386 #define FF_QSCALE_TYPE_MPEG1 0
387 #define FF_QSCALE_TYPE_MPEG2 1
388
389 #define FF_BUFFER_TYPE_INTERNAL 1
390 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
391 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base)
392 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
393
394
395 #define FF_I_TYPE 1 // Intra
396 #define FF_P_TYPE 2 // Predicted
397 #define FF_B_TYPE 3 // Bi-dir predicted
398 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
399 #define FF_SI_TYPE 5
400 #define FF_SP_TYPE 6
401
402 /**
403 * Audio Video Frame.
404 */
405 typedef struct AVFrame {
406 FF_COMMON_FRAME
407 } AVFrame;
408
409 #define DEFAULT_FRAME_RATE_BASE 1001000
410
411 /**
412 * main external api structure.
413 */
414 typedef struct AVCodecContext {
415 /**
416 * the average bitrate.
417 * - encoding: set by user. unused for constant quantizer encoding
418 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
419 */
420 int bit_rate;
421
422 /**
423 * number of bits the bitstream is allowed to diverge from the reference.
424 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
425 * - encoding: set by user. unused for constant quantizer encoding
426 * - decoding: unused
427 */
428 int bit_rate_tolerance;
429
430 /**
431 * CODEC_FLAG_*.
432 * - encoding: set by user.
433 * - decoding: set by user.
434 */
435 int flags;
436
437 /**
438 * some codecs needs additionnal format info. It is stored here
439 * - encoding: set by user.
440 * - decoding: set by lavc. (FIXME is this ok?)
441 */
442 int sub_id;
443
444 /**
445 * motion estimation algorithm used for video coding.
446 * - encoding: MUST be set by user.
447 * - decoding: unused
448 */
449 int me_method;
450
451 /**
452 * some codecs need / can use extra-data like huffman tables.
453 * mjpeg: huffman tables
454 * rv10: additional flags
455 * mpeg4: global headers (they can be in the bitstream or here)
456 * - encoding: set/allocated/freed by lavc.
457 * - decoding: set/allocated/freed by user.
458 */
459 void *extradata;
460 int extradata_size;
461
462 /* video only */
463 /**
464 * frames per sec multiplied by frame_rate_base.
465 * for variable fps this is the precission, so if the timestamps
466 * can be specified in msec precssion then this is 1000*frame_rate_base
467 * - encoding: MUST be set by user
468 * - decoding: set by lavc. 0 or the frame_rate if available
469 */
470 int frame_rate;
471
472 /**
473 * width / height.
474 * - encoding: MUST be set by user.
475 * - decoding: set by user, some codecs might override / change it during playback
476 */
477 int width, height;
478
479 #define FF_ASPECT_SQUARE 1
480 #define FF_ASPECT_4_3_625 2
481 #define FF_ASPECT_4_3_525 3
482 #define FF_ASPECT_16_9_625 4
483 #define FF_ASPECT_16_9_525 5
484 #define FF_ASPECT_EXTENDED 15
485
486 /**
487 * the number of pictures in a group of pitures, or 0 for intra_only.
488 * - encoding: set by user.
489 * - decoding: unused
490 */
491 int gop_size;
492
493 /**
494 * pixel format, see PIX_FMT_xxx.
495 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
496 * conversion is in order. This only works for
497 * codecs with one supported pix_fmt, we should
498 * do something for a generic case as well.
499 * - decoding: set by lavc.
500 */
501 enum PixelFormat pix_fmt;
502
503 /**
504 * Frame rate emulation. If not zero lower layer (i.e. format handler)
505 * has to read frames at native frame rate.
506 * - encoding: set by user.
507 * - decoding: unused.
508 */
509 int rate_emu;
510
511 /**
512 * if non NULL, 'draw_horiz_band' is called by the libavcodec
513 * decoder to draw an horizontal band. It improve cache usage. Not
514 * all codecs can do that. You must check the codec capabilities
515 * before
516 * - encoding: unused
517 * - decoding: set by user.
518 * @param height the height of the slice
519 * @param y the y position of the slice
520 * @param type 1->top field, 2->bottom field, 3->frame
521 * @param offset offset into the AVFrame.data from which the slice should be read
522 */
523 void (*draw_horiz_band)(struct AVCodecContext *s,
524 const AVFrame *src, int offset[4],
525 int y, int type, int height);
526
527 /* audio only */
528 int sample_rate; ///< samples per sec
529 int channels;
530 int sample_fmt; ///< sample format, currenly unused
531
532 /* the following data should not be initialized */
533 int frame_size; ///< in samples, initialized when calling 'init'
534 int frame_number; ///< audio or video frame number
535 int real_pict_num; ///< returns the real picture number of previous encoded frame
536
537 /**
538 * number of frames the decoded output will be delayed relative to
539 * the encoded input.
540 * - encoding: set by lavc.
541 * - decoding: unused
542 */
543 int delay;
544
545 /* - encoding parameters */
546 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
547 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
548
549 /**
550 * minimum quantizer.
551 * - encoding: set by user.
552 * - decoding: unused
553 */
554 int qmin;
555
556 /**
557 * maximum quantizer.
558 * - encoding: set by user.
559 * - decoding: unused
560 */
561 int qmax;
562
563 /**
564 * maximum quantizer difference etween frames.
565 * - encoding: set by user.
566 * - decoding: unused
567 */
568 int max_qdiff;
569
570 /**
571 * maximum number of b frames between non b frames.
572 * note: the output will be delayed by max_b_frames+1 relative to the input
573 * - encoding: set by user.
574 * - decoding: unused
575 */
576 int max_b_frames;
577
578 /**
579 * qscale factor between ip and b frames.
580 * - encoding: set by user.
581 * - decoding: unused
582 */
583 float b_quant_factor;
584
585 /** obsolete FIXME remove */
586 int rc_strategy;
587 int b_frame_strategy;
588
589 /**
590 * hurry up amount.
591 * - encoding: unused
592 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
593 */
594 int hurry_up;
595
596 struct AVCodec *codec;
597
598 void *priv_data;
599
600 /* The following data is for RTP friendly coding */
601 /* By now only H.263/H.263+/MPEG4 coder honours this */
602 int rtp_mode; /* 1 for activate RTP friendly-mode */
603 /* highers numbers represent more error-prone */
604 /* enviroments, by now just "1" exist */
605
606 int rtp_payload_size; /* The size of the RTP payload, the coder will */
607 /* do it's best to deliver a chunk with size */
608 /* below rtp_payload_size, the chunk will start */
609 /* with a start code on some codecs like H.263 */
610 /* This doesn't take account of any particular */
611 /* headers inside the transmited RTP payload */
612
613
614 /* The RTP callcack: This function is called */
615 /* every time the encoder as a packet to send */
616 /* Depends on the encoder if the data starts */
617 /* with a Start Code (it should) H.263 does */
618 void (*rtp_callback)(void *data, int size, int packet_number);
619
620 /* statistics, used for 2-pass encoding */
621 int mv_bits;
622 int header_bits;
623 int i_tex_bits;
624 int p_tex_bits;
625 int i_count;
626 int p_count;
627 int skip_count;
628 int misc_bits;
629
630 /**
631 * number of bits used for the previously encoded frame.
632 * - encoding: set by lavc
633 * - decoding: unused
634 */
635 int frame_bits;
636
637 /**
638 * private data of the user, can be used to carry app specific stuff.
639 * - encoding: set by user
640 * - decoding: set by user
641 */
642 void *opaque;
643
644 char codec_name[32];
645 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
646 enum CodecID codec_id; /* see CODEC_ID_xxx */
647
648 /**
649 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
650 * this is used to workaround some encoder bugs
651 * - encoding: set by user, if not then the default based on codec_id will be used
652 * - decoding: set by user, will be converted to upper case by lavc during init
653 */
654 unsigned int codec_tag;
655
656 /**
657 * workaround bugs in encoders which sometimes cannot be detected automatically.
658 * - encoding: unused
659 * - decoding: set by user
660 */
661 int workaround_bugs;
662 #define FF_BUG_AUTODETECT 1 ///< autodetection
663 #define FF_BUG_OLD_MSMPEG4 2
664 #define FF_BUG_XVID_ILACE 4
665 #define FF_BUG_UMP4 8
666 #define FF_BUG_NO_PADDING 16
667 #define FF_BUG_AC_VLC 32
668 #define FF_BUG_QPEL_CHROMA 64
669 #define FF_BUG_STD_QPEL 128
670 #define FF_BUG_QPEL_CHROMA2 256
671 #define FF_BUG_DIRECT_BLOCKSIZE 512
672 #define FF_BUG_EDGE 1024
673 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
674
675 /**
676 * luma single coeff elimination threshold.
677 * - encoding: set by user
678 * - decoding: unused
679 */
680 int luma_elim_threshold;
681
682 /**
683 * chroma single coeff elimination threshold.
684 * - encoding: set by user
685 * - decoding: unused
686 */
687 int chroma_elim_threshold;
688
689 /**
690 * strictly follow the std (MPEG4, ...).
691 * - encoding: set by user
692 * - decoding: unused
693 */
694 int strict_std_compliance;
695
696 /**
697 * qscale offset between ip and b frames.
698 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
699 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
700 * - encoding: set by user.
701 * - decoding: unused
702 */
703 float b_quant_offset;
704
705 /**
706 * error resilience higher values will detect more errors but may missdetect
707 * some more or less valid parts as errors.
708 * - encoding: unused
709 * - decoding: set by user
710 */
711 int error_resilience;
712 #define FF_ER_CAREFULL 1
713 #define FF_ER_COMPLIANT 2
714 #define FF_ER_AGGRESSIVE 3
715 #define FF_ER_VERY_AGGRESSIVE 4
716
717 /**
718 * called at the beginning of each frame to get a buffer for it.
719 * if pic.reference is set then the frame will be read later by lavc
720 * width and height should be rounded up to the next multiple of 16
721 * - encoding: unused
722 * - decoding: set by lavc, user can override
723 */
724 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
725
726 /**
727 * called to release buffers which where allocated with get_buffer.
728 * a released buffer can be reused in get_buffer()
729 * pic.data[*] must be set to NULL
730 * - encoding: unused
731 * - decoding: set by lavc, user can override
732 */
733 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
734
735 /**
736 * is 1 if the decoded stream contains b frames, 0 otherwise.
737 * - encoding: unused
738 * - decoding: set by lavc
739 */
740 int has_b_frames;
741
742 int block_align; ///< used by some WAV based audio codecs
743
744 int parse_only; /* - decoding only: if true, only parsing is done
745 (function avcodec_parse_frame()). The frame
746 data is returned. Only MPEG codecs support this now. */
747
748 /**
749 * 0-> h263 quant 1-> mpeg quant.
750 * - encoding: set by user.
751 * - decoding: unused
752 */
753 int mpeg_quant;
754
755 /**
756 * pass1 encoding statistics output buffer.
757 * - encoding: set by lavc
758 * - decoding: unused
759 */
760 char *stats_out;
761
762 /**
763 * pass2 encoding statistics input buffer.
764 * concatenated stuff from stats_out of pass1 should be placed here
765 * - encoding: allocated/set/freed by user
766 * - decoding: unused
767 */
768 char *stats_in;
769
770 /**
771 * ratecontrol qmin qmax limiting method.
772 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
773 * - encoding: set by user.
774 * - decoding: unused
775 */
776 float rc_qsquish;
777
778 float rc_qmod_amp;
779 int rc_qmod_freq;
780
781 /**
782 * ratecontrol override, see RcOverride.
783 * - encoding: allocated/set/freed by user.
784 * - decoding: unused
785 */
786 RcOverride *rc_override;
787 int rc_override_count;
788
789 /**
790 * rate control equation.
791 * - encoding: set by user
792 * - decoding: unused
793 */
794 char *rc_eq;
795
796 /**
797 * maximum bitrate.
798 * - encoding: set by user.
799 * - decoding: unused
800 */
801 int rc_max_rate;
802
803 /**
804 * minimum bitrate.
805 * - encoding: set by user.
806 * - decoding: unused
807 */
808 int rc_min_rate;
809
810 /**
811 * decoder bitstream buffer size.
812 * - encoding: set by user.
813 * - decoding: unused
814 */
815 int rc_buffer_size;
816 float rc_buffer_aggressivity;
817
818 /**
819 * qscale factor between p and i frames.
820 * - encoding: set by user.
821 * - decoding: unused
822 */
823 float i_quant_factor;
824
825 /**
826 * qscale offset between p and i frames.
827 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
828 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
829 * - encoding: set by user.
830 * - decoding: unused
831 */
832 float i_quant_offset;
833
834 /**
835 * initial complexity for pass1 ratecontrol.
836 * - encoding: set by user.
837 * - decoding: unused
838 */
839 float rc_initial_cplx;
840
841 /**
842 * dct algorithm, see FF_DCT_* below.
843 * - encoding: set by user
844 * - decoding: unused
845 */
846 int dct_algo;
847 #define FF_DCT_AUTO 0
848 #define FF_DCT_FASTINT 1
849 #define FF_DCT_INT 2
850 #define FF_DCT_MMX 3
851 #define FF_DCT_MLIB 4
852 #define FF_DCT_ALTIVEC 5
853
854 /**
855 * luminance masking (0-> disabled).
856 * - encoding: set by user
857 * - decoding: unused
858 */
859 float lumi_masking;
860
861 /**
862 * temporary complexity masking (0-> disabled).
863 * - encoding: set by user
864 * - decoding: unused
865 */
866 float temporal_cplx_masking;
867
868 /**
869 * spatial complexity masking (0-> disabled).
870 * - encoding: set by user
871 * - decoding: unused
872 */
873 float spatial_cplx_masking;
874
875 /**
876 * p block masking (0-> disabled).
877 * - encoding: set by user
878 * - decoding: unused
879 */
880 float p_masking;
881
882 /**
883 * darkness masking (0-> disabled).
884 * - encoding: set by user
885 * - decoding: unused
886 */
887 float dark_masking;
888
889
890 /* for binary compatibility */
891 int unused;
892
893 /**
894 * idct algorithm, see FF_IDCT_* below.
895 * - encoding: set by user
896 * - decoding: set by user
897 */
898 int idct_algo;
899 #define FF_IDCT_AUTO 0
900 #define FF_IDCT_INT 1
901 #define FF_IDCT_SIMPLE 2
902 #define FF_IDCT_SIMPLEMMX 3
903 #define FF_IDCT_LIBMPEG2MMX 4
904 #define FF_IDCT_PS2 5
905 #define FF_IDCT_MLIB 6
906 #define FF_IDCT_ARM 7
907 #define FF_IDCT_ALTIVEC 8
908 #define FF_IDCT_SH4 9
909 #define FF_IDCT_SIMPLEARM 10
910
911 /**
912 * slice count.
913 * - encoding: set by lavc
914 * - decoding: set by user (or 0)
915 */
916 int slice_count;
917 /**
918 * slice offsets in the frame in bytes.
919 * - encoding: set/allocated by lavc
920 * - decoding: set/allocated by user (or NULL)
921 */
922 int *slice_offset;
923
924 /**
925 * error concealment flags.
926 * - encoding: unused
927 * - decoding: set by user
928 */
929 int error_concealment;
930 #define FF_EC_GUESS_MVS 1
931 #define FF_EC_DEBLOCK 2
932
933 /**
934 * dsp_mask could be add used to disable unwanted CPU features
935 * CPU features (i.e. MMX, SSE. ...)
936 *
937 * with FORCE flag you may instead enable given CPU features
938 * (Dangerous: usable in case of misdetection, improper usage however will
939 * result into program crash)
940 */
941 unsigned dsp_mask;
942 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
943 /* lower 16 bits - CPU features */
944 #ifdef HAVE_MMX
945 #define FF_MM_MMX 0x0001 /* standard MMX */
946 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
947 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
948 #define FF_MM_SSE 0x0008 /* SSE functions */
949 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
950 #endif /* HAVE_MMX */
951
952 /**
953 * bits per sample/pixel from the demuxer (needed for huffyuv).
954 * - encoding: set by lavc
955 * - decoding: set by user
956 */
957 int bits_per_sample;
958
959 /**
960 * prediction method (needed for huffyuv).
961 * - encoding: set by user
962 * - decoding: unused
963 */
964 int prediction_method;
965 #define FF_PRED_LEFT 0
966 #define FF_PRED_PLANE 1
967 #define FF_PRED_MEDIAN 2
968
969 /**
970 * aspect ratio (0 if unknown).
971 * - encoding: set by user.
972 * - decoding: set by lavc.
973 */
974 float aspect_ratio;
975
976 /**
977 * the picture in the bitstream.
978 * - encoding: set by lavc
979 * - decoding: set by lavc
980 */
981 AVFrame *coded_frame;
982
983 /**
984 * debug.
985 * - encoding: set by user.
986 * - decoding: set by user.
987 */
988 int debug;
989 #define FF_DEBUG_PICT_INFO 1
990 #define FF_DEBUG_RC 2
991 #define FF_DEBUG_BITSTREAM 4
992 #define FF_DEBUG_MB_TYPE 8
993 #define FF_DEBUG_QP 16
994 #define FF_DEBUG_MV 32
995 #define FF_DEBUG_VIS_MV 0x00000040
996 #define FF_DEBUG_SKIP 0x00000080
997 #define FF_DEBUG_STARTCODE 0x00000100
998 #define FF_DEBUG_PTS 0x00000200
999 #define FF_DEBUG_ER 0x00000400
1000 #define FF_DEBUG_MMCO 0x00000800
1001 #define FF_DEBUG_BUGS 0x00001000
1002
1003 /**
1004 * error.
1005 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1006 * - decoding: unused
1007 */
1008 uint64_t error[4];
1009
1010 /**
1011 * minimum MB quantizer.
1012 * - encoding: set by user.
1013 * - decoding: unused
1014 */
1015 int mb_qmin;
1016
1017 /**
1018 * maximum MB quantizer.
1019 * - encoding: set by user.
1020 * - decoding: unused
1021 */
1022 int mb_qmax;
1023
1024 /**
1025 * motion estimation compare function.
1026 * - encoding: set by user.
1027 * - decoding: unused
1028 */
1029 int me_cmp;
1030 /**
1031 * subpixel motion estimation compare function.
1032 * - encoding: set by user.
1033 * - decoding: unused
1034 */
1035 int me_sub_cmp;
1036 /**
1037 * macroblock compare function (not supported yet).
1038 * - encoding: set by user.
1039 * - decoding: unused
1040 */
1041 int mb_cmp;
1042 #define FF_CMP_SAD 0
1043 #define FF_CMP_SSE 1
1044 #define FF_CMP_SATD 2
1045 #define FF_CMP_DCT 3
1046 #define FF_CMP_PSNR 4
1047 #define FF_CMP_BIT 5
1048 #define FF_CMP_RD 6
1049 #define FF_CMP_ZERO 7
1050 #define FF_CMP_CHROMA 256
1051
1052 /**
1053 * ME diamond size & shape.
1054 * - encoding: set by user.
1055 * - decoding: unused
1056 */
1057 int dia_size;
1058
1059 /**
1060 * amount of previous MV predictors (2a+1 x 2a+1 square).
1061 * - encoding: set by user.
1062 * - decoding: unused
1063 */
1064 int last_predictor_count;
1065
1066 /**
1067 * pre pass for motion estimation.
1068 * - encoding: set by user.
1069 * - decoding: unused
1070 */
1071 int pre_me;
1072
1073 /**
1074 * motion estimation pre pass compare function.
1075 * - encoding: set by user.
1076 * - decoding: unused
1077 */
1078 int me_pre_cmp;
1079
1080 /**
1081 * ME pre pass diamond size & shape.
1082 * - encoding: set by user.
1083 * - decoding: unused
1084 */
1085 int pre_dia_size;
1086
1087 /**
1088 * subpel ME quality.
1089 * - encoding: set by user.
1090 * - decoding: unused
1091 */
1092 int me_subpel_quality;
1093
1094 /**
1095 * callback to negotiate the pixelFormat.
1096 * @param fmt is the list of formats which are supported by the codec,
1097 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1098 * the first is allways the native one
1099 * @return the choosen format
1100 * - encoding: unused
1101 * - decoding: set by user, if not set then the native format will always be choosen
1102 */
1103 enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
1104
1105 /**
1106 * DTG active format information (additionnal aspect ratio
1107 * information only used in DVB MPEG2 transport streams). 0 if
1108 * not set.
1109 *
1110 * - encoding: unused.
1111 * - decoding: set by decoder
1112 */
1113 int dtg_active_format;
1114 #define FF_DTG_AFD_SAME 8
1115 #define FF_DTG_AFD_4_3 9
1116 #define FF_DTG_AFD_16_9 10
1117 #define FF_DTG_AFD_14_9 11
1118 #define FF_DTG_AFD_4_3_SP_14_9 13
1119 #define FF_DTG_AFD_16_9_SP_14_9 14
1120 #define FF_DTG_AFD_SP_4_3 15
1121
1122 /**
1123 * Maximum motion estimation search range in subpel units.
1124 * if 0 then no limit
1125 *
1126 * - encoding: set by user.
1127 * - decoding: unused.
1128 */
1129 int me_range;
1130
1131 /**
1132 * frame_rate_base.
1133 * for variable fps this is 1
1134 * - encoding: set by user.
1135 * - decoding: set by lavc.
1136 * @todo move this after frame_rate
1137 */
1138
1139 int frame_rate_base;
1140 /**
1141 * intra quantizer bias.
1142 * - encoding: set by user.
1143 * - decoding: unused
1144 */
1145 int intra_quant_bias;
1146 #define FF_DEFAULT_QUANT_BIAS 999999
1147
1148 /**
1149 * inter quantizer bias.
1150 * - encoding: set by user.
1151 * - decoding: unused
1152 */
1153 int inter_quant_bias;
1154
1155 /**
1156 * color table ID.
1157 * - encoding: unused.
1158 * - decoding: which clrtable should be used for 8bit RGB images
1159 * table have to be stored somewhere FIXME
1160 */
1161 int color_table_id;
1162
1163 /**
1164 * internal_buffer count.
1165 * Dont touch, used by lavc default_get_buffer()
1166 */
1167 int internal_buffer_count;
1168
1169 /**
1170 * internal_buffers.
1171 * Dont touch, used by lavc default_get_buffer()
1172 */
1173 void *internal_buffer;
1174
1175 #define FF_QUALITY_SCALE 256
1176 /**
1177 * global quality for codecs which cannot change it per frame.
1178 * this should be proportional to MPEG1/2/4 qscale.
1179 * - encoding: set by user.
1180 * - decoding: unused
1181 */
1182 int global_quality;
1183
1184 #define FF_CODER_TYPE_VLC 0
1185 #define FF_CODER_TYPE_AC 1
1186 /**
1187 * coder type
1188 * - encoding: set by user.
1189 * - decoding: unused
1190 */
1191 int coder_type;
1192
1193 /**
1194 * context model
1195 * - encoding: set by user.
1196 * - decoding: unused
1197 */
1198 int context_model;
1199
1200 /**
1201 * slice flags
1202 * - encoding: unused
1203 * - decoding: set by user.
1204 */
1205 int slice_flags;
1206 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1207 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1208 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1209
1210 /**
1211 * XVideo Motion Acceleration
1212 * - encoding: forbidden
1213 * - decoding: set by decoder
1214 */
1215 int xvmc_acceleration;
1216
1217 /**
1218 * macroblock decision mode
1219 * - encoding: set by user.
1220 * - decoding: unused
1221 */
1222 int mb_decision;
1223 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1224 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1225 #define FF_MB_DECISION_RD 2 ///< rate distoration
1226
1227 /**
1228 * custom intra quantization matrix
1229 * - encoding: set by user, can be NULL
1230 * - decoding: set by lavc
1231 */
1232 uint16_t *intra_matrix;
1233
1234 /**
1235 * custom inter quantization matrix
1236 * - encoding: set by user, can be NULL
1237 * - decoding: set by lavc
1238 */
1239 uint16_t *inter_matrix;
1240
1241 /**
1242 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1243 * this is used to workaround some encoder bugs
1244 * - encoding: unused
1245 * - decoding: set by user, will be converted to upper case by lavc during init
1246 */
1247 unsigned int stream_codec_tag;
1248
1249 /**
1250 * scene change detection threshold.
1251 * 0 is default, larger means fewer detected scene changes
1252 * - encoding: set by user.
1253 * - decoding: unused
1254 */
1255 int scenechange_threshold;
1256 } AVCodecContext;
1257
1258
1259 /**
1260 * AVOption.
1261 */
1262 typedef struct AVOption {
1263 /** options' name */
1264 const char *name; /* if name is NULL, it indicates a link to next */
1265 /** short English text help or const struct AVOption* subpointer */
1266 const char *help; // const struct AVOption* sub;
1267 /** offset to context structure where the parsed value should be stored */
1268 int offset;
1269 /** options' type */
1270 int type;
1271 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1272 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1273 #define FF_OPT_TYPE_INT 3 ///< integer
1274 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1275 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1276 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1277 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1278 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1279 /** min value (min == max -> no limits) */
1280 double min;
1281 /** maximum value for double/int */
1282 double max;
1283 /** default boo [0,1]l/double/int value */
1284 double defval;
1285 /**
1286 * default string value (with optional semicolon delimited extra option-list
1287 * i.e. option1;option2;option3
1288 * defval might select other then first argument as default
1289 */
1290 const char *defstr;
1291 #define FF_OPT_MAX_DEPTH 10
1292 } AVOption;
1293
1294 /**
1295 * Parse option(s) and sets fields in passed structure
1296 * @param strct structure where the parsed results will be written
1297 * @param list list with AVOptions
1298 * @param opts string with options for parsing
1299 */
1300 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1301
1302
1303 /**
1304 * AVCodec.
1305 */
1306 typedef struct AVCodec {
1307 const char *name;
1308 enum CodecType type;
1309 int id;
1310 int priv_data_size;
1311 int (*init)(AVCodecContext *);
1312 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1313 int (*close)(AVCodecContext *);
1314 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1315 uint8_t *buf, int buf_size);
1316 int capabilities;
1317 const AVOption *options;
1318 struct AVCodec *next;
1319 void (*flush)(AVCodecContext *);
1320 } AVCodec;
1321
1322 /**
1323 * four components are given, that's all.
1324 * the last component is alpha
1325 */
1326 typedef struct AVPicture {
1327 uint8_t *data[4];
1328 int linesize[4]; ///< number of bytes per line
1329 } AVPicture;
1330
1331 /**
1332 * AVPaletteControl
1333 * This structure defines a method for communicating palette changes
1334 * between and demuxer and a decoder.
1335 */
1336 typedef struct AVPaletteControl {
1337
1338 /* demuxer sets this to 1 to indicate the palette has changed;
1339 * decoder resets to 0 */
1340 int palette_changed;
1341
1342 /* 256 3-byte RGB palette entries; the components should be
1343 * formatted in the buffer as "RGBRGB..." and should be scaled to
1344 * 8 bits if they originally represented 6-bit VGA palette
1345 * components */
1346 unsigned char palette[256 * 3];
1347
1348 } AVPaletteControl;
1349
1350 extern AVCodec ac3_encoder;
1351 extern AVCodec mp2_encoder;
1352 extern AVCodec mp3lame_encoder;
1353 extern AVCodec oggvorbis_encoder;
1354 extern AVCodec mpeg1video_encoder;
1355 extern AVCodec mpeg2video_encoder;
1356 extern AVCodec h263_encoder;
1357 extern AVCodec h263p_encoder;
1358 extern AVCodec flv_encoder;
1359 extern AVCodec rv10_encoder;
1360 extern AVCodec mjpeg_encoder;
1361 extern AVCodec ljpeg_encoder;
1362 extern AVCodec mpeg4_encoder;
1363 extern AVCodec msmpeg4v1_encoder;
1364 extern AVCodec msmpeg4v2_encoder;
1365 extern AVCodec msmpeg4v3_encoder;
1366 extern AVCodec wmv1_encoder;
1367 extern AVCodec wmv2_encoder;
1368 extern AVCodec huffyuv_encoder;
1369 extern AVCodec h264_encoder;
1370 extern AVCodec asv1_encoder;
1371 extern AVCodec asv2_encoder;
1372 extern AVCodec vcr1_encoder;
1373 extern AVCodec ffv1_encoder;
1374 extern AVCodec mdec_encoder;
1375
1376 extern AVCodec h263_decoder;
1377 extern AVCodec mpeg4_decoder;
1378 extern AVCodec msmpeg4v1_decoder;
1379 extern AVCodec msmpeg4v2_decoder;
1380 extern AVCodec msmpeg4v3_decoder;
1381 extern AVCodec wmv1_decoder;
1382 extern AVCodec wmv2_decoder;
1383 extern AVCodec mpeg1video_decoder;
1384 extern AVCodec mpeg2video_decoder;
1385 extern AVCodec mpeg_xvmc_decoder;
1386 extern AVCodec h263i_decoder;
1387 extern AVCodec flv_decoder;
1388 extern AVCodec rv10_decoder;
1389 extern AVCodec svq1_decoder;
1390 extern AVCodec svq3_decoder;
1391 extern AVCodec dvvideo_decoder;
1392 extern AVCodec wmav1_decoder;
1393 extern AVCodec wmav2_decoder;
1394 extern AVCodec mjpeg_decoder;
1395 extern AVCodec mjpegb_decoder;
1396 extern AVCodec mp2_decoder;
1397 extern AVCodec mp3_decoder;
1398 extern AVCodec mace3_decoder;
1399 extern AVCodec mace6_decoder;
1400 extern AVCodec huffyuv_decoder;
1401 extern AVCodec oggvorbis_decoder;
1402 extern AVCodec cyuv_decoder;
1403 extern AVCodec h264_decoder;
1404 extern AVCodec indeo3_decoder;
1405 extern AVCodec vp3_decoder;
1406 extern AVCodec amr_nb_decoder;
1407 extern AVCodec amr_nb_encoder;
1408 extern AVCodec amr_wb_encoder;
1409 extern AVCodec amr_wb_decoder;
1410 extern AVCodec aac_decoder;
1411 extern AVCodec mpeg4aac_decoder;
1412 extern AVCodec asv1_decoder;
1413 extern AVCodec asv2_decoder;
1414 extern AVCodec vcr1_decoder;
1415 extern AVCodec cljr_decoder;
1416 extern AVCodec ffv1_decoder;
1417 extern AVCodec fourxm_decoder;
1418 extern AVCodec mdec_decoder;
1419 extern AVCodec roq_decoder;
1420 extern AVCodec interplay_video_decoder;
1421 extern AVCodec xan_wc3_decoder;
1422 extern AVCodec ra_144_decoder;
1423 extern AVCodec ra_288_decoder;
1424 extern AVCodec roq_dpcm_decoder;
1425 extern AVCodec interplay_dpcm_decoder;
1426 extern AVCodec xan_dpcm_decoder;
1427
1428 /* pcm codecs */
1429 #define PCM_CODEC(id, name) \
1430 extern AVCodec name ## _decoder; \
1431 extern AVCodec name ## _encoder
1432
1433 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1434 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1435 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1436 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1437 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1438 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1439 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1440 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1441
1442 /* adpcm codecs */
1443
1444 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1445 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1446 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1447 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1448 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1449 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1450
1451 #undef PCM_CODEC
1452
1453 /* dummy raw video codec */
1454 extern AVCodec rawvideo_encoder;
1455 extern AVCodec rawvideo_decoder;
1456
1457 /* the following codecs use external GPL libs */
1458 extern AVCodec ac3_decoder;
1459
1460 /* resample.c */
1461
1462 struct ReSampleContext;
1463
1464 typedef struct ReSampleContext ReSampleContext;
1465
1466 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1467 int output_rate, int input_rate);
1468 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1469 void audio_resample_close(ReSampleContext *s);
1470
1471 /* YUV420 format is assumed ! */
1472
1473 struct ImgReSampleContext;
1474
1475 typedef struct ImgReSampleContext ImgReSampleContext;
1476
1477 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1478 int input_width, int input_height);
1479
1480 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1481 int iwidth, int iheight,
1482 int topBand, int bottomBand,
1483 int leftBand, int rightBand);
1484
1485 void img_resample(ImgReSampleContext *s,
1486 AVPicture *output, const AVPicture *input);
1487
1488 void img_resample_close(ImgReSampleContext *s);
1489
1490 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1491 int pix_fmt, int width, int height);
1492 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1493 unsigned char *dest, int dest_size);
1494 int avpicture_get_size(int pix_fmt, int width, int height);
1495 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1496 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1497 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1498
1499 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1500 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1501 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1502 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1503 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1504 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1505
1506 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1507 int has_alpha);
1508 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1509 int has_alpha, int *loss_ptr);
1510
1511 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1512 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1513 int img_get_alpha_info(const AVPicture *src,
1514 int pix_fmt, int width, int height);
1515
1516 /* convert among pixel formats */
1517 int img_convert(AVPicture *dst, int dst_pix_fmt,
1518 const AVPicture *src, int pix_fmt,
1519 int width, int height);
1520
1521 /* deinterlace a picture */
1522 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1523 int pix_fmt, int width, int height);
1524
1525 /* external high level API */
1526
1527 extern AVCodec *first_avcodec;
1528
1529 /* returns LIBAVCODEC_VERSION_INT constant */
1530 unsigned avcodec_version(void);
1531 /* returns LIBAVCODEC_BUILD constant */
1532 unsigned avcodec_build(void);
1533 void avcodec_init(void);
1534
1535 void register_avcodec(AVCodec *format);
1536 AVCodec *avcodec_find_encoder(enum CodecID id);
1537 AVCodec *avcodec_find_encoder_by_name(const char *name);
1538 AVCodec *avcodec_find_decoder(enum CodecID id);
1539 AVCodec *avcodec_find_decoder_by_name(const char *name);
1540 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1541
1542 void avcodec_get_context_defaults(AVCodecContext *s);
1543 AVCodecContext *avcodec_alloc_context(void);
1544 AVFrame *avcodec_alloc_frame(void);
1545
1546 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1547 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1548 void avcodec_default_free_buffers(AVCodecContext *s);
1549
1550 /**
1551 * opens / inits the AVCodecContext.
1552 * not thread save!
1553 */
1554 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1555
1556 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1557 int *frame_size_ptr,
1558 uint8_t *buf, int buf_size);
1559 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1560 int *got_picture_ptr,
1561 uint8_t *buf, int buf_size);
1562 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
1563 int *data_size_ptr,
1564 uint8_t *buf, int buf_size);
1565 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1566 const short *samples);
1567 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1568 const AVFrame *pict);
1569
1570 int avcodec_close(AVCodecContext *avctx);
1571
1572 void avcodec_register_all(void);
1573
1574 void avcodec_flush_buffers(AVCodecContext *avctx);
1575
1576 /* misc usefull functions */
1577
1578 /**
1579 * returns a single letter to describe the picture type
1580 */
1581 char av_get_pict_type_char(int pict_type);
1582
1583 /**
1584 * reduce a fraction.
1585 * this is usefull for framerate calculations
1586 * @param max the maximum allowed for dst_nom & dst_den
1587 * @return 1 if exact, 0 otherwise
1588 */
1589 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1590
1591 /**
1592 * rescale a 64bit integer.
1593 * a simple a*b/c isnt possible as it can overflow
1594 */
1595 int64_t av_rescale(int64_t a, int b, int c);
1596
1597
1598 /**
1599 * Interface for 0.5.0 version
1600 *
1601 * do not even think about it's usage for this moment
1602 */
1603
1604 typedef struct {
1605 /// compressed size used from given memory buffer
1606 int size;
1607 /// I/P/B frame type
1608 int frame_type;
1609 } avc_enc_result_t;
1610
1611 /**
1612 * Commands
1613 * order can't be changed - once it was defined
1614 */
1615 typedef enum {
1616 // general commands
1617 AVC_OPEN_BY_NAME = 0xACA000,
1618 AVC_OPEN_BY_CODEC_ID,
1619 AVC_OPEN_BY_FOURCC,
1620 AVC_CLOSE,
1621
1622 AVC_FLUSH,
1623 // pin - struct { uint8_t* src, uint_t src_size }
1624 // pout - struct { AVPicture* img, consumed_bytes,
1625 AVC_DECODE,
1626 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1627 // pout - uint_t used_from_dest_size
1628 AVC_ENCODE,
1629
1630 // query/get video commands
1631 AVC_GET_VERSION = 0xACB000,
1632 AVC_GET_WIDTH,
1633 AVC_GET_HEIGHT,
1634 AVC_GET_DELAY,
1635 AVC_GET_QUANT_TABLE,
1636 // ...
1637
1638 // query/get audio commands
1639 AVC_GET_FRAME_SIZE = 0xABC000,
1640
1641 // maybe define some simple structure which
1642 // might be passed to the user - but they can't
1643 // contain any codec specific parts and these
1644 // calls are usualy necessary only few times
1645
1646 // set video commands
1647 AVC_SET_WIDTH = 0xACD000,
1648 AVC_SET_HEIGHT,
1649
1650 // set video encoding commands
1651 AVC_SET_FRAME_RATE = 0xACD800,
1652 AVC_SET_QUALITY,
1653 AVC_SET_HURRY_UP,
1654
1655 // set audio commands
1656 AVC_SET_SAMPLE_RATE = 0xACE000,
1657 AVC_SET_CHANNELS,
1658
1659 } avc_cmd_t;
1660
1661 /**
1662 * \param handle allocated private structure by libavcodec
1663 * for initialization pass NULL - will be returned pout
1664 * user is supposed to know nothing about its structure
1665 * \param cmd type of operation to be performed
1666 * \param pint input parameter
1667 * \param pout output parameter
1668 *
1669 * \returns command status - eventually for query command it might return
1670 * integer resulting value
1671 */
1672 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1673
1674 /* memory */
1675 void *av_malloc(unsigned int size);
1676 void *av_mallocz(unsigned int size);
1677 void *av_realloc(void *ptr, unsigned int size);
1678 void av_free(void *ptr);
1679 char *av_strdup(const char *s);
1680 void __av_freep(void **ptr);
1681 #define av_freep(p) __av_freep((void **)(p))
1682 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
1683 /* for static data only */
1684 /* call av_free_static to release all staticaly allocated tables */
1685 void av_free_static(void);
1686 void *__av_mallocz_static(void** location, unsigned int size);
1687 #define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
1688
1689 #ifdef __cplusplus
1690 }
1691 #endif
1692
1693 #endif /* AVCODEC_H */