* providing MPEG codecs with a generic fields in AVFrame to use.
[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 4684
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_SP5X,
42 CODEC_ID_MPEG4,
43 CODEC_ID_RAWVIDEO,
44 CODEC_ID_MSMPEG4V1,
45 CODEC_ID_MSMPEG4V2,
46 CODEC_ID_MSMPEG4V3,
47 CODEC_ID_WMV1,
48 CODEC_ID_WMV2,
49 CODEC_ID_H263P,
50 CODEC_ID_H263I,
51 CODEC_ID_FLV1,
52 CODEC_ID_SVQ1,
53 CODEC_ID_SVQ3,
54 CODEC_ID_DVVIDEO,
55 CODEC_ID_DVAUDIO,
56 CODEC_ID_WMAV1,
57 CODEC_ID_WMAV2,
58 CODEC_ID_MACE3,
59 CODEC_ID_MACE6,
60 CODEC_ID_HUFFYUV,
61 CODEC_ID_CYUV,
62 CODEC_ID_H264,
63 CODEC_ID_INDEO3,
64 CODEC_ID_VP3,
65 CODEC_ID_THEORA,
66 CODEC_ID_AAC,
67 CODEC_ID_MPEG4AAC,
68 CODEC_ID_ASV1,
69 CODEC_ID_ASV2,
70 CODEC_ID_FFV1,
71 CODEC_ID_4XM,
72 CODEC_ID_VCR1,
73 CODEC_ID_CLJR,
74 CODEC_ID_MDEC,
75 CODEC_ID_ROQ,
76 CODEC_ID_INTERPLAY_VIDEO,
77 CODEC_ID_XAN_WC3,
78 CODEC_ID_XAN_WC4,
79 CODEC_ID_RPZA,
80 CODEC_ID_CINEPAK,
81 CODEC_ID_WS_VQA,
82 CODEC_ID_MSRLE,
83 CODEC_ID_MSVIDEO1,
84 CODEC_ID_IDCIN,
85
86 /* various pcm "codecs" */
87 CODEC_ID_PCM_S16LE,
88 CODEC_ID_PCM_S16BE,
89 CODEC_ID_PCM_U16LE,
90 CODEC_ID_PCM_U16BE,
91 CODEC_ID_PCM_S8,
92 CODEC_ID_PCM_U8,
93 CODEC_ID_PCM_MULAW,
94 CODEC_ID_PCM_ALAW,
95
96 /* various adpcm codecs */
97 CODEC_ID_ADPCM_IMA_QT,
98 CODEC_ID_ADPCM_IMA_WAV,
99 CODEC_ID_ADPCM_IMA_DK3,
100 CODEC_ID_ADPCM_IMA_DK4,
101 CODEC_ID_ADPCM_IMA_WS,
102 CODEC_ID_ADPCM_MS,
103 CODEC_ID_ADPCM_4XM,
104 CODEC_ID_ADPCM_XA,
105 CODEC_ID_ADPCM_ADX,
106
107 /* AMR */
108 CODEC_ID_AMR_NB,
109 CODEC_ID_AMR_WB,
110
111 /* RealAudio codecs*/
112 CODEC_ID_RA_144,
113 CODEC_ID_RA_288,
114
115 /* various DPCM codecs */
116 CODEC_ID_ROQ_DPCM,
117 CODEC_ID_INTERPLAY_DPCM,
118 CODEC_ID_XAN_DPCM,
119 };
120
121 /* CODEC_ID_MP3LAME is absolete */
122 #define CODEC_ID_MP3LAME CODEC_ID_MP3
123
124 enum CodecType {
125 CODEC_TYPE_UNKNOWN = -1,
126 CODEC_TYPE_VIDEO,
127 CODEC_TYPE_AUDIO,
128 };
129
130 /**
131 * Pixel format. Notes:
132 *
133 * PIX_FMT_RGBA32 is handled in an endian-specific manner. A RGBA
134 * color is put together as:
135 * (A << 24) | (R << 16) | (G << 8) | B
136 * This is stored as BGRA on little endian CPU architectures and ARGB on
137 * big endian CPUs.
138 *
139 * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
140 * image data is stored in AVFrame.data[0]. The palette is transported in
141 * AVFrame.data[1] and, is 1024 bytes long (256 4-byte entries) and is
142 * formatted the same as in PIX_FMT_RGBA32 described above (i.e., it is
143 * also endian-specific). Note also that the individual RGB palette
144 * components stored in AVFrame.data[1] should be in the range 0..255.
145 * This is important as many custom PAL8 video codecs that were designed
146 * to run on the IBM VGA graphics adapter use 6-bit palette components.
147 */
148 enum PixelFormat {
149 PIX_FMT_YUV420P, ///< Planar YUV 4:2:0 (1 Cr & Cb sample per 2x2 Y samples)
150 PIX_FMT_YUV422,
151 PIX_FMT_RGB24, ///< Packed pixel, 3 bytes per pixel, RGBRGB...
152 PIX_FMT_BGR24, ///< Packed pixel, 3 bytes per pixel, BGRBGR...
153 PIX_FMT_YUV422P, ///< Planar YUV 4:2:2 (1 Cr & Cb sample per 2x1 Y samples)
154 PIX_FMT_YUV444P, ///< Planar YUV 4:4:4 (1 Cr & Cb sample per 1x1 Y samples)
155 PIX_FMT_RGBA32, ///< Packed pixel, 4 bytes per pixel, BGRABGRA..., stored in cpu endianness
156 PIX_FMT_YUV410P, ///< Planar YUV 4:1:0 (1 Cr & Cb sample per 4x4 Y samples)
157 PIX_FMT_YUV411P, ///< Planar YUV 4:1:1 (1 Cr & Cb sample per 4x1 Y samples)
158 PIX_FMT_RGB565, ///< always stored in cpu endianness
159 PIX_FMT_RGB555, ///< always stored in cpu endianness, most significant bit to 1
160 PIX_FMT_GRAY8,
161 PIX_FMT_MONOWHITE, ///< 0 is white
162 PIX_FMT_MONOBLACK, ///< 0 is black
163 PIX_FMT_PAL8, ///< 8 bit with RGBA palette
164 PIX_FMT_YUVJ420P, ///< Planar YUV 4:2:0 full scale (jpeg)
165 PIX_FMT_YUVJ422P, ///< Planar YUV 4:2:2 full scale (jpeg)
166 PIX_FMT_YUVJ444P, ///< Planar YUV 4:4:4 full scale (jpeg)
167 PIX_FMT_XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing(xvmc_render.h)
168 PIX_FMT_XVMC_MPEG2_IDCT,
169 PIX_FMT_NB,
170 };
171
172 /* currently unused, may be used if 24/32 bits samples ever supported */
173 enum SampleFormat {
174 SAMPLE_FMT_S16 = 0, ///< signed 16 bits
175 };
176
177 /* in bytes */
178 #define AVCODEC_MAX_AUDIO_FRAME_SIZE 131072
179
180 /**
181 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
182 * this is mainly needed because some optimized bitstream readers read
183 * 32 or 64 bit at once and could read over the end<br>
184 * Note, if the first 23 bits of the additional bytes are not 0 then damaged
185 * MPEG bitstreams could cause overread and segfault
186 */
187 #define FF_INPUT_BUFFER_PADDING_SIZE 8
188
189 /* motion estimation type, EPZS by default */
190 enum Motion_Est_ID {
191 ME_ZERO = 1,
192 ME_FULL,
193 ME_LOG,
194 ME_PHODS,
195 ME_EPZS,
196 ME_X1
197 };
198
199 typedef struct RcOverride{
200 int start_frame;
201 int end_frame;
202 int qscale; // if this is 0 then quality_factor will be used instead
203 float quality_factor;
204 } RcOverride;
205
206 /* only for ME compatiblity with old apps */
207 extern int motion_estimation_method;
208
209 /* ME algos sorted by quality */
210 //FIXME remove IMHO
211 static const int Motion_Est_QTab[] = { ME_ZERO, ME_PHODS, ME_LOG,
212 ME_X1, ME_EPZS, ME_FULL };
213
214
215 #define FF_MAX_B_FRAMES 8
216
217 /* encoding support
218 these flags can be passed in AVCodecContext.flags before initing
219 Note: note not everything is supported yet
220 */
221
222 #define CODEC_FLAG_QSCALE 0x0002 ///< use fixed qscale
223 #define CODEC_FLAG_4MV 0x0004 ///< 4 MV per MB allowed
224 #define CODEC_FLAG_QPEL 0x0010 ///< use qpel MC
225 #define CODEC_FLAG_GMC 0x0020 ///< use GMC
226 #define CODEC_FLAG_MV0 0x0040 ///< always try a MB with MV=<0,0>
227 #define CODEC_FLAG_PART 0x0080 ///< use data partitioning
228 /* parent program gurantees that the input for b-frame containing streams is not written to
229 for at least s->max_b_frames+1 frames, if this is not set than the input will be copied */
230 #define CODEC_FLAG_INPUT_PRESERVED 0x0100
231 #define CODEC_FLAG_PASS1 0x0200 ///< use internal 2pass ratecontrol in first pass mode
232 #define CODEC_FLAG_PASS2 0x0400 ///< use internal 2pass ratecontrol in second pass mode
233 #define CODEC_FLAG_EXTERN_HUFF 0x1000 ///< use external huffman table (for mjpeg)
234 #define CODEC_FLAG_GRAY 0x2000 ///< only decode/encode grayscale
235 #define CODEC_FLAG_EMU_EDGE 0x4000///< dont draw edges
236 #define CODEC_FLAG_PSNR 0x8000 ///< error[?] variables will be set during encoding
237 #define CODEC_FLAG_TRUNCATED 0x00010000 /** input bitstream might be truncated at a random location instead
238 of only at frame boundaries */
239 #define CODEC_FLAG_NORMALIZE_AQP 0x00020000 ///< normalize adaptive quantization
240 #define CODEC_FLAG_INTERLACED_DCT 0x00040000 ///< use interlaced dct
241 #define CODEC_FLAG_LOW_DELAY 0x00080000 ///< force low delay
242 #define CODEC_FLAG_ALT_SCAN 0x00100000 ///< use alternate scan
243 #define CODEC_FLAG_TRELLIS_QUANT 0x00200000 ///< use trellis quantization
244 #define CODEC_FLAG_GLOBAL_HEADER 0x00400000 ///< place global headers in extradata instead of every keyframe
245 #define CODEC_FLAG_BITEXACT 0x00800000 ///< use only bitexact stuff (except (i)dct)
246 /* Fx : Flag for h263+ extra options */
247 #define CODEC_FLAG_H263P_AIC 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction (remove this)
248 #define CODEC_FLAG_AC_PRED 0x01000000 ///< H263 Advanced intra coding / MPEG4 AC prediction
249 #define CODEC_FLAG_H263P_UMV 0x02000000 ///< Unlimited motion vector
250 #define CODEC_FLAG_CBP_RD 0x04000000 ///< use rate distortion optimization for cbp
251 /* For advanced prediction mode, we reuse the 4MV flag */
252 /* Unsupported options :
253 * Syntax Arithmetic coding (SAC)
254 * Deblocking filter internal loop
255 * Slice structured
256 * Reference Picture Selection
257 * Independant Segment Decoding
258 * Alternative Inter * VLC
259 * Modified Quantization */
260 /* /Fx */
261 /* codec capabilities */
262
263 #define CODEC_CAP_DRAW_HORIZ_BAND 0x0001 ///< decoder can use draw_horiz_band callback
264 /**
265 * Codec uses get_buffer() for allocating buffers.
266 * direct rendering method 1
267 */
268 #define CODEC_CAP_DR1 0x0002
269 /* if 'parse_only' field is true, then avcodec_parse_frame() can be
270 used */
271 #define CODEC_CAP_PARSE_ONLY 0x0004
272 #define CODEC_CAP_TRUNCATED 0x0008
273
274 #define FF_COMMON_FRAME \
275 /**\
276 * pointer to the picture planes.\
277 * this might be different from the first allocated byte\
278 * - encoding: \
279 * - decoding: \
280 */\
281 uint8_t *data[4];\
282 int linesize[4];\
283 /**\
284 * pointer to the first allocated byte of the picture. can be used in get_buffer/release_buffer\
285 * this isnt used by lavc unless the default get/release_buffer() is used\
286 * - encoding: \
287 * - decoding: \
288 */\
289 uint8_t *base[4];\
290 /**\
291 * 1 -> keyframe, 0-> not\
292 * - encoding: set by lavc\
293 * - decoding: set by lavc\
294 */\
295 int key_frame;\
296 \
297 /**\
298 * picture type of the frame, see ?_TYPE below.\
299 * - encoding: set by lavc for coded_picture (and set by user for input)\
300 * - decoding: set by lavc\
301 */\
302 int pict_type;\
303 \
304 /**\
305 * presentation timestamp in micro seconds (time when frame should be shown to user)\
306 * if 0 then the frame_rate will be used as reference\
307 * - encoding: MUST be set by user\
308 * - decoding: set by lavc\
309 */\
310 int64_t pts;\
311 \
312 /**\
313 * picture number in bitstream order.\
314 * - encoding: set by\
315 * - decoding: set by lavc\
316 */\
317 int coded_picture_number;\
318 /**\
319 * picture number in display order.\
320 * - encoding: set by\
321 * - decoding: set by lavc\
322 */\
323 int display_picture_number;\
324 \
325 /**\
326 * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) \
327 * - encoding: set by lavc for coded_picture (and set by user for input)\
328 * - decoding: set by lavc\
329 */\
330 int quality; \
331 \
332 /**\
333 * buffer age (1->was last buffer and dint change, 2->..., ...).\
334 * set to INT_MAX if the buffer has not been used yet \
335 * - encoding: unused\
336 * - decoding: MUST be set by get_buffer()\
337 */\
338 int age;\
339 \
340 /**\
341 * is this picture used as reference\
342 * - encoding: unused\
343 * - decoding: set by lavc (before get_buffer() call))\
344 */\
345 int reference;\
346 \
347 /**\
348 * QP table\
349 * - encoding: unused\
350 * - decoding: set by lavc\
351 */\
352 int8_t *qscale_table;\
353 /**\
354 * QP store stride\
355 * - encoding: unused\
356 * - decoding: set by lavc\
357 */\
358 int qstride;\
359 \
360 /**\
361 * mbskip_table[mb]>=1 if MB didnt change\
362 * stride= mb_width = (width+15)>>4\
363 * - encoding: unused\
364 * - decoding: set by lavc\
365 */\
366 uint8_t *mbskip_table;\
367 \
368 /**\
369 * for some private data of the user\
370 * - encoding: unused\
371 * - decoding: set by user\
372 */\
373 void *opaque;\
374 \
375 /**\
376 * error\
377 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR\
378 * - decoding: unused\
379 */\
380 uint64_t error[4];\
381 \
382 /**\
383 * type of the buffer (to keep track of who has to dealloc data[*])\
384 * - encoding: set by the one who allocs it\
385 * - decoding: set by the one who allocs it\
386 * Note: user allocated (direct rendering) & internal buffers can not coexist currently\
387 */\
388 int type;\
389 \
390 /**\
391 * when decoding, this signal how much the picture must be delayed.\
392 * extra_delay = repeat_pict / (2*fps)\
393 * - encoding: unused\
394 * - decoding: set by lavc\
395 */\
396 int repeat_pict;\
397 \
398 /**\
399 * \
400 */\
401 int qscale_type;\
402 \
403 /**\
404 * The content of the picture is interlaced.\
405 * - encoding: set by user\
406 * - decoding: set by lavc (default 0)\
407 */\
408 int interlaced_frame;\
409 \
410 /**\
411 * if the content is interlaced, is bottom field displayed first.\
412 * - encoding: set by user\
413 * - decoding: set by lavc (default 0)\
414 */\
415 int bottom_field_first;\
416
417 #define FF_QSCALE_TYPE_MPEG1 0
418 #define FF_QSCALE_TYPE_MPEG2 1
419
420 #define FF_BUFFER_TYPE_INTERNAL 1
421 #define FF_BUFFER_TYPE_USER 2 ///< Direct rendering buffers (image is (de)allocated by user)
422 #define FF_BUFFER_TYPE_SHARED 4 ///< buffer from somewher else, dont dealloc image (data/base)
423 #define FF_BUFFER_TYPE_COPY 8 ///< just a (modified) copy of some other buffer, dont dealloc anything
424
425
426 #define FF_I_TYPE 1 // Intra
427 #define FF_P_TYPE 2 // Predicted
428 #define FF_B_TYPE 3 // Bi-dir predicted
429 #define FF_S_TYPE 4 // S(GMC)-VOP MPEG4
430 #define FF_SI_TYPE 5
431 #define FF_SP_TYPE 6
432
433 /**
434 * Audio Video Frame.
435 */
436 typedef struct AVFrame {
437 FF_COMMON_FRAME
438 } AVFrame;
439
440 #define DEFAULT_FRAME_RATE_BASE 1001000
441
442 /**
443 * main external api structure.
444 */
445 typedef struct AVCodecContext {
446 /**
447 * the average bitrate.
448 * - encoding: set by user. unused for constant quantizer encoding
449 * - decoding: set by lavc. 0 or some bitrate if this info is available in the stream
450 */
451 int bit_rate;
452
453 /**
454 * number of bits the bitstream is allowed to diverge from the reference.
455 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
456 * - encoding: set by user. unused for constant quantizer encoding
457 * - decoding: unused
458 */
459 int bit_rate_tolerance;
460
461 /**
462 * CODEC_FLAG_*.
463 * - encoding: set by user.
464 * - decoding: set by user.
465 */
466 int flags;
467
468 /**
469 * some codecs needs additionnal format info. It is stored here
470 * - encoding: set by user.
471 * - decoding: set by lavc. (FIXME is this ok?)
472 */
473 int sub_id;
474
475 /**
476 * motion estimation algorithm used for video coding.
477 * - encoding: MUST be set by user.
478 * - decoding: unused
479 */
480 int me_method;
481
482 /**
483 * some codecs need / can use extra-data like huffman tables.
484 * mjpeg: huffman tables
485 * rv10: additional flags
486 * mpeg4: global headers (they can be in the bitstream or here)
487 * - encoding: set/allocated/freed by lavc.
488 * - decoding: set/allocated/freed by user.
489 */
490 void *extradata;
491 int extradata_size;
492
493 /* video only */
494 /**
495 * frames per sec multiplied by frame_rate_base.
496 * for variable fps this is the precission, so if the timestamps
497 * can be specified in msec precssion then this is 1000*frame_rate_base
498 * - encoding: MUST be set by user
499 * - decoding: set by lavc. 0 or the frame_rate if available
500 */
501 int frame_rate;
502
503 /**
504 * width / height.
505 * - encoding: MUST be set by user.
506 * - decoding: set by user if known, codec should override / dynamically change if needed
507 */
508 int width, height;
509
510 #define FF_ASPECT_SQUARE 1
511 #define FF_ASPECT_4_3_625 2
512 #define FF_ASPECT_4_3_525 3
513 #define FF_ASPECT_16_9_625 4
514 #define FF_ASPECT_16_9_525 5
515 #define FF_ASPECT_EXTENDED 15
516
517 /**
518 * the number of pictures in a group of pitures, or 0 for intra_only.
519 * - encoding: set by user.
520 * - decoding: unused
521 */
522 int gop_size;
523
524 /**
525 * pixel format, see PIX_FMT_xxx.
526 * - encoding: FIXME: used by ffmpeg to decide whether an pix_fmt
527 * conversion is in order. This only works for
528 * codecs with one supported pix_fmt, we should
529 * do something for a generic case as well.
530 * - decoding: set by lavc.
531 */
532 enum PixelFormat pix_fmt;
533
534 /**
535 * Frame rate emulation. If not zero lower layer (i.e. format handler)
536 * has to read frames at native frame rate.
537 * - encoding: set by user.
538 * - decoding: unused.
539 */
540 int rate_emu;
541
542 /**
543 * if non NULL, 'draw_horiz_band' is called by the libavcodec
544 * decoder to draw an horizontal band. It improve cache usage. Not
545 * all codecs can do that. You must check the codec capabilities
546 * before
547 * - encoding: unused
548 * - decoding: set by user.
549 * @param height the height of the slice
550 * @param y the y position of the slice
551 * @param type 1->top field, 2->bottom field, 3->frame
552 * @param offset offset into the AVFrame.data from which the slice should be read
553 */
554 void (*draw_horiz_band)(struct AVCodecContext *s,
555 const AVFrame *src, int offset[4],
556 int y, int type, int height);
557
558 /* audio only */
559 int sample_rate; ///< samples per sec
560 int channels;
561 int sample_fmt; ///< sample format, currenly unused
562
563 /* the following data should not be initialized */
564 int frame_size; ///< in samples, initialized when calling 'init'
565 int frame_number; ///< audio or video frame number
566 int real_pict_num; ///< returns the real picture number of previous encoded frame
567
568 /**
569 * number of frames the decoded output will be delayed relative to
570 * the encoded input.
571 * - encoding: set by lavc.
572 * - decoding: unused
573 */
574 int delay;
575
576 /* - encoding parameters */
577 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
578 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
579
580 /**
581 * minimum quantizer.
582 * - encoding: set by user.
583 * - decoding: unused
584 */
585 int qmin;
586
587 /**
588 * maximum quantizer.
589 * - encoding: set by user.
590 * - decoding: unused
591 */
592 int qmax;
593
594 /**
595 * maximum quantizer difference etween frames.
596 * - encoding: set by user.
597 * - decoding: unused
598 */
599 int max_qdiff;
600
601 /**
602 * maximum number of b frames between non b frames.
603 * note: the output will be delayed by max_b_frames+1 relative to the input
604 * - encoding: set by user.
605 * - decoding: unused
606 */
607 int max_b_frames;
608
609 /**
610 * qscale factor between ip and b frames.
611 * - encoding: set by user.
612 * - decoding: unused
613 */
614 float b_quant_factor;
615
616 /** obsolete FIXME remove */
617 int rc_strategy;
618 int b_frame_strategy;
619
620 /**
621 * hurry up amount.
622 * - encoding: unused
623 * - decoding: set by user. 1-> skip b frames, 2-> skip idct/dequant too, 5-> skip everything except header
624 */
625 int hurry_up;
626
627 struct AVCodec *codec;
628
629 void *priv_data;
630
631 /* The following data is for RTP friendly coding */
632 /* By now only H.263/H.263+/MPEG4 coder honours this */
633 int rtp_mode; /* 1 for activate RTP friendly-mode */
634 /* highers numbers represent more error-prone */
635 /* enviroments, by now just "1" exist */
636
637 int rtp_payload_size; /* The size of the RTP payload, the coder will */
638 /* do it's best to deliver a chunk with size */
639 /* below rtp_payload_size, the chunk will start */
640 /* with a start code on some codecs like H.263 */
641 /* This doesn't take account of any particular */
642 /* headers inside the transmited RTP payload */
643
644
645 /* The RTP callcack: This function is called */
646 /* every time the encoder as a packet to send */
647 /* Depends on the encoder if the data starts */
648 /* with a Start Code (it should) H.263 does */
649 void (*rtp_callback)(void *data, int size, int packet_number);
650
651 /* statistics, used for 2-pass encoding */
652 int mv_bits;
653 int header_bits;
654 int i_tex_bits;
655 int p_tex_bits;
656 int i_count;
657 int p_count;
658 int skip_count;
659 int misc_bits;
660
661 /**
662 * number of bits used for the previously encoded frame.
663 * - encoding: set by lavc
664 * - decoding: unused
665 */
666 int frame_bits;
667
668 /**
669 * private data of the user, can be used to carry app specific stuff.
670 * - encoding: set by user
671 * - decoding: set by user
672 */
673 void *opaque;
674
675 char codec_name[32];
676 enum CodecType codec_type; /* see CODEC_TYPE_xxx */
677 enum CodecID codec_id; /* see CODEC_ID_xxx */
678
679 /**
680 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
681 * this is used to workaround some encoder bugs
682 * - encoding: set by user, if not then the default based on codec_id will be used
683 * - decoding: set by user, will be converted to upper case by lavc during init
684 */
685 unsigned int codec_tag;
686
687 /**
688 * workaround bugs in encoders which sometimes cannot be detected automatically.
689 * - encoding: unused
690 * - decoding: set by user
691 */
692 int workaround_bugs;
693 #define FF_BUG_AUTODETECT 1 ///< autodetection
694 #define FF_BUG_OLD_MSMPEG4 2
695 #define FF_BUG_XVID_ILACE 4
696 #define FF_BUG_UMP4 8
697 #define FF_BUG_NO_PADDING 16
698 #define FF_BUG_AC_VLC 0 ///< will be removed, libavcodec can now handle these non compliant files by default
699 #define FF_BUG_QPEL_CHROMA 64
700 #define FF_BUG_STD_QPEL 128
701 #define FF_BUG_QPEL_CHROMA2 256
702 #define FF_BUG_DIRECT_BLOCKSIZE 512
703 #define FF_BUG_EDGE 1024
704 //#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
705
706 /**
707 * luma single coeff elimination threshold.
708 * - encoding: set by user
709 * - decoding: unused
710 */
711 int luma_elim_threshold;
712
713 /**
714 * chroma single coeff elimination threshold.
715 * - encoding: set by user
716 * - decoding: unused
717 */
718 int chroma_elim_threshold;
719
720 /**
721 * strictly follow the std (MPEG4, ...).
722 * - encoding: set by user
723 * - decoding: unused
724 */
725 int strict_std_compliance;
726
727 /**
728 * qscale offset between ip and b frames.
729 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
730 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
731 * - encoding: set by user.
732 * - decoding: unused
733 */
734 float b_quant_offset;
735
736 /**
737 * error resilience higher values will detect more errors but may missdetect
738 * some more or less valid parts as errors.
739 * - encoding: unused
740 * - decoding: set by user
741 */
742 int error_resilience;
743 #define FF_ER_CAREFULL 1
744 #define FF_ER_COMPLIANT 2
745 #define FF_ER_AGGRESSIVE 3
746 #define FF_ER_VERY_AGGRESSIVE 4
747
748 /**
749 * called at the beginning of each frame to get a buffer for it.
750 * if pic.reference is set then the frame will be read later by lavc
751 * width and height should be rounded up to the next multiple of 16
752 * - encoding: unused
753 * - decoding: set by lavc, user can override
754 */
755 int (*get_buffer)(struct AVCodecContext *c, AVFrame *pic);
756
757 /**
758 * called to release buffers which where allocated with get_buffer.
759 * a released buffer can be reused in get_buffer()
760 * pic.data[*] must be set to NULL
761 * - encoding: unused
762 * - decoding: set by lavc, user can override
763 */
764 void (*release_buffer)(struct AVCodecContext *c, AVFrame *pic);
765
766 /**
767 * is 1 if the decoded stream contains b frames, 0 otherwise.
768 * - encoding: unused
769 * - decoding: set by lavc
770 */
771 int has_b_frames;
772
773 int block_align; ///< used by some WAV based audio codecs
774
775 int parse_only; /* - decoding only: if true, only parsing is done
776 (function avcodec_parse_frame()). The frame
777 data is returned. Only MPEG codecs support this now. */
778
779 /**
780 * 0-> h263 quant 1-> mpeg quant.
781 * - encoding: set by user.
782 * - decoding: unused
783 */
784 int mpeg_quant;
785
786 /**
787 * pass1 encoding statistics output buffer.
788 * - encoding: set by lavc
789 * - decoding: unused
790 */
791 char *stats_out;
792
793 /**
794 * pass2 encoding statistics input buffer.
795 * concatenated stuff from stats_out of pass1 should be placed here
796 * - encoding: allocated/set/freed by user
797 * - decoding: unused
798 */
799 char *stats_in;
800
801 /**
802 * ratecontrol qmin qmax limiting method.
803 * 0-> clipping, 1-> use a nice continous function to limit qscale wthin qmin/qmax
804 * - encoding: set by user.
805 * - decoding: unused
806 */
807 float rc_qsquish;
808
809 float rc_qmod_amp;
810 int rc_qmod_freq;
811
812 /**
813 * ratecontrol override, see RcOverride.
814 * - encoding: allocated/set/freed by user.
815 * - decoding: unused
816 */
817 RcOverride *rc_override;
818 int rc_override_count;
819
820 /**
821 * rate control equation.
822 * - encoding: set by user
823 * - decoding: unused
824 */
825 char *rc_eq;
826
827 /**
828 * maximum bitrate.
829 * - encoding: set by user.
830 * - decoding: unused
831 */
832 int rc_max_rate;
833
834 /**
835 * minimum bitrate.
836 * - encoding: set by user.
837 * - decoding: unused
838 */
839 int rc_min_rate;
840
841 /**
842 * decoder bitstream buffer size.
843 * - encoding: set by user.
844 * - decoding: unused
845 */
846 int rc_buffer_size;
847 float rc_buffer_aggressivity;
848
849 /**
850 * qscale factor between p and i frames.
851 * - encoding: set by user.
852 * - decoding: unused
853 */
854 float i_quant_factor;
855
856 /**
857 * qscale offset between p and i frames.
858 * if > 0 then the last p frame quantizer will be used (q= lastp_q*factor+offset)
859 * if < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset)
860 * - encoding: set by user.
861 * - decoding: unused
862 */
863 float i_quant_offset;
864
865 /**
866 * initial complexity for pass1 ratecontrol.
867 * - encoding: set by user.
868 * - decoding: unused
869 */
870 float rc_initial_cplx;
871
872 /**
873 * dct algorithm, see FF_DCT_* below.
874 * - encoding: set by user
875 * - decoding: unused
876 */
877 int dct_algo;
878 #define FF_DCT_AUTO 0
879 #define FF_DCT_FASTINT 1
880 #define FF_DCT_INT 2
881 #define FF_DCT_MMX 3
882 #define FF_DCT_MLIB 4
883 #define FF_DCT_ALTIVEC 5
884
885 /**
886 * luminance masking (0-> disabled).
887 * - encoding: set by user
888 * - decoding: unused
889 */
890 float lumi_masking;
891
892 /**
893 * temporary complexity masking (0-> disabled).
894 * - encoding: set by user
895 * - decoding: unused
896 */
897 float temporal_cplx_masking;
898
899 /**
900 * spatial complexity masking (0-> disabled).
901 * - encoding: set by user
902 * - decoding: unused
903 */
904 float spatial_cplx_masking;
905
906 /**
907 * p block masking (0-> disabled).
908 * - encoding: set by user
909 * - decoding: unused
910 */
911 float p_masking;
912
913 /**
914 * darkness masking (0-> disabled).
915 * - encoding: set by user
916 * - decoding: unused
917 */
918 float dark_masking;
919
920
921 /* for binary compatibility */
922 int unused;
923
924 /**
925 * idct algorithm, see FF_IDCT_* below.
926 * - encoding: set by user
927 * - decoding: set by user
928 */
929 int idct_algo;
930 #define FF_IDCT_AUTO 0
931 #define FF_IDCT_INT 1
932 #define FF_IDCT_SIMPLE 2
933 #define FF_IDCT_SIMPLEMMX 3
934 #define FF_IDCT_LIBMPEG2MMX 4
935 #define FF_IDCT_PS2 5
936 #define FF_IDCT_MLIB 6
937 #define FF_IDCT_ARM 7
938 #define FF_IDCT_ALTIVEC 8
939 #define FF_IDCT_SH4 9
940 #define FF_IDCT_SIMPLEARM 10
941
942 /**
943 * slice count.
944 * - encoding: set by lavc
945 * - decoding: set by user (or 0)
946 */
947 int slice_count;
948 /**
949 * slice offsets in the frame in bytes.
950 * - encoding: set/allocated by lavc
951 * - decoding: set/allocated by user (or NULL)
952 */
953 int *slice_offset;
954
955 /**
956 * error concealment flags.
957 * - encoding: unused
958 * - decoding: set by user
959 */
960 int error_concealment;
961 #define FF_EC_GUESS_MVS 1
962 #define FF_EC_DEBLOCK 2
963
964 /**
965 * dsp_mask could be add used to disable unwanted CPU features
966 * CPU features (i.e. MMX, SSE. ...)
967 *
968 * with FORCE flag you may instead enable given CPU features
969 * (Dangerous: usable in case of misdetection, improper usage however will
970 * result into program crash)
971 */
972 unsigned dsp_mask;
973 #define FF_MM_FORCE 0x80000000 /* force usage of selected flags (OR) */
974 /* lower 16 bits - CPU features */
975 #ifdef HAVE_MMX
976 #define FF_MM_MMX 0x0001 /* standard MMX */
977 #define FF_MM_3DNOW 0x0004 /* AMD 3DNOW */
978 #define FF_MM_MMXEXT 0x0002 /* SSE integer functions or AMD MMX ext */
979 #define FF_MM_SSE 0x0008 /* SSE functions */
980 #define FF_MM_SSE2 0x0010 /* PIV SSE2 functions */
981 #endif /* HAVE_MMX */
982
983 /**
984 * bits per sample/pixel from the demuxer (needed for huffyuv).
985 * - encoding: set by lavc
986 * - decoding: set by user
987 */
988 int bits_per_sample;
989
990 /**
991 * prediction method (needed for huffyuv).
992 * - encoding: set by user
993 * - decoding: unused
994 */
995 int prediction_method;
996 #define FF_PRED_LEFT 0
997 #define FF_PRED_PLANE 1
998 #define FF_PRED_MEDIAN 2
999
1000 /**
1001 * aspect ratio (0 if unknown).
1002 * - encoding: set by user.
1003 * - decoding: set by lavc.
1004 */
1005 float aspect_ratio;
1006
1007 /**
1008 * the picture in the bitstream.
1009 * - encoding: set by lavc
1010 * - decoding: set by lavc
1011 */
1012 AVFrame *coded_frame;
1013
1014 /**
1015 * debug.
1016 * - encoding: set by user.
1017 * - decoding: set by user.
1018 */
1019 int debug;
1020 #define FF_DEBUG_PICT_INFO 1
1021 #define FF_DEBUG_RC 2
1022 #define FF_DEBUG_BITSTREAM 4
1023 #define FF_DEBUG_MB_TYPE 8
1024 #define FF_DEBUG_QP 16
1025 #define FF_DEBUG_MV 32
1026 #define FF_DEBUG_VIS_MV 0x00000040
1027 #define FF_DEBUG_SKIP 0x00000080
1028 #define FF_DEBUG_STARTCODE 0x00000100
1029 #define FF_DEBUG_PTS 0x00000200
1030 #define FF_DEBUG_ER 0x00000400
1031 #define FF_DEBUG_MMCO 0x00000800
1032 #define FF_DEBUG_BUGS 0x00001000
1033
1034 /**
1035 * error.
1036 * - encoding: set by lavc if flags&CODEC_FLAG_PSNR
1037 * - decoding: unused
1038 */
1039 uint64_t error[4];
1040
1041 /**
1042 * minimum MB quantizer.
1043 * - encoding: set by user.
1044 * - decoding: unused
1045 */
1046 int mb_qmin;
1047
1048 /**
1049 * maximum MB quantizer.
1050 * - encoding: set by user.
1051 * - decoding: unused
1052 */
1053 int mb_qmax;
1054
1055 /**
1056 * motion estimation compare function.
1057 * - encoding: set by user.
1058 * - decoding: unused
1059 */
1060 int me_cmp;
1061 /**
1062 * subpixel motion estimation compare function.
1063 * - encoding: set by user.
1064 * - decoding: unused
1065 */
1066 int me_sub_cmp;
1067 /**
1068 * macroblock compare function (not supported yet).
1069 * - encoding: set by user.
1070 * - decoding: unused
1071 */
1072 int mb_cmp;
1073 #define FF_CMP_SAD 0
1074 #define FF_CMP_SSE 1
1075 #define FF_CMP_SATD 2
1076 #define FF_CMP_DCT 3
1077 #define FF_CMP_PSNR 4
1078 #define FF_CMP_BIT 5
1079 #define FF_CMP_RD 6
1080 #define FF_CMP_ZERO 7
1081 #define FF_CMP_CHROMA 256
1082
1083 /**
1084 * ME diamond size & shape.
1085 * - encoding: set by user.
1086 * - decoding: unused
1087 */
1088 int dia_size;
1089
1090 /**
1091 * amount of previous MV predictors (2a+1 x 2a+1 square).
1092 * - encoding: set by user.
1093 * - decoding: unused
1094 */
1095 int last_predictor_count;
1096
1097 /**
1098 * pre pass for motion estimation.
1099 * - encoding: set by user.
1100 * - decoding: unused
1101 */
1102 int pre_me;
1103
1104 /**
1105 * motion estimation pre pass compare function.
1106 * - encoding: set by user.
1107 * - decoding: unused
1108 */
1109 int me_pre_cmp;
1110
1111 /**
1112 * ME pre pass diamond size & shape.
1113 * - encoding: set by user.
1114 * - decoding: unused
1115 */
1116 int pre_dia_size;
1117
1118 /**
1119 * subpel ME quality.
1120 * - encoding: set by user.
1121 * - decoding: unused
1122 */
1123 int me_subpel_quality;
1124
1125 /**
1126 * callback to negotiate the pixelFormat.
1127 * @param fmt is the list of formats which are supported by the codec,
1128 * its terminated by -1 as 0 is a valid format, the formats are ordered by quality
1129 * the first is allways the native one
1130 * @return the choosen format
1131 * - encoding: unused
1132 * - decoding: set by user, if not set then the native format will always be choosen
1133 */
1134 enum PixelFormat (*get_format)(struct AVCodecContext *s, enum PixelFormat * fmt);
1135
1136 /**
1137 * DTG active format information (additionnal aspect ratio
1138 * information only used in DVB MPEG2 transport streams). 0 if
1139 * not set.
1140 *
1141 * - encoding: unused.
1142 * - decoding: set by decoder
1143 */
1144 int dtg_active_format;
1145 #define FF_DTG_AFD_SAME 8
1146 #define FF_DTG_AFD_4_3 9
1147 #define FF_DTG_AFD_16_9 10
1148 #define FF_DTG_AFD_14_9 11
1149 #define FF_DTG_AFD_4_3_SP_14_9 13
1150 #define FF_DTG_AFD_16_9_SP_14_9 14
1151 #define FF_DTG_AFD_SP_4_3 15
1152
1153 /**
1154 * Maximum motion estimation search range in subpel units.
1155 * if 0 then no limit
1156 *
1157 * - encoding: set by user.
1158 * - decoding: unused.
1159 */
1160 int me_range;
1161
1162 /**
1163 * frame_rate_base.
1164 * for variable fps this is 1
1165 * - encoding: set by user.
1166 * - decoding: set by lavc.
1167 * @todo move this after frame_rate
1168 */
1169
1170 int frame_rate_base;
1171 /**
1172 * intra quantizer bias.
1173 * - encoding: set by user.
1174 * - decoding: unused
1175 */
1176 int intra_quant_bias;
1177 #define FF_DEFAULT_QUANT_BIAS 999999
1178
1179 /**
1180 * inter quantizer bias.
1181 * - encoding: set by user.
1182 * - decoding: unused
1183 */
1184 int inter_quant_bias;
1185
1186 /**
1187 * color table ID.
1188 * - encoding: unused.
1189 * - decoding: which clrtable should be used for 8bit RGB images
1190 * table have to be stored somewhere FIXME
1191 */
1192 int color_table_id;
1193
1194 /**
1195 * internal_buffer count.
1196 * Dont touch, used by lavc default_get_buffer()
1197 */
1198 int internal_buffer_count;
1199
1200 /**
1201 * internal_buffers.
1202 * Dont touch, used by lavc default_get_buffer()
1203 */
1204 void *internal_buffer;
1205
1206 #define FF_LAMBDA_SHIFT 7
1207 #define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
1208 #define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
1209 #define FF_LAMBDA_MAX (256*128-1)
1210
1211 #define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
1212 /**
1213 * global quality for codecs which cannot change it per frame.
1214 * this should be proportional to MPEG1/2/4 qscale.
1215 * - encoding: set by user.
1216 * - decoding: unused
1217 */
1218 int global_quality;
1219
1220 #define FF_CODER_TYPE_VLC 0
1221 #define FF_CODER_TYPE_AC 1
1222 /**
1223 * coder type
1224 * - encoding: set by user.
1225 * - decoding: unused
1226 */
1227 int coder_type;
1228
1229 /**
1230 * context model
1231 * - encoding: set by user.
1232 * - decoding: unused
1233 */
1234 int context_model;
1235
1236 /**
1237 * slice flags
1238 * - encoding: unused
1239 * - decoding: set by user.
1240 */
1241 int slice_flags;
1242 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
1243 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG2 field pics)
1244 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
1245
1246 /**
1247 * XVideo Motion Acceleration
1248 * - encoding: forbidden
1249 * - decoding: set by decoder
1250 */
1251 int xvmc_acceleration;
1252
1253 /**
1254 * macroblock decision mode
1255 * - encoding: set by user.
1256 * - decoding: unused
1257 */
1258 int mb_decision;
1259 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
1260 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
1261 #define FF_MB_DECISION_RD 2 ///< rate distoration
1262
1263 /**
1264 * custom intra quantization matrix
1265 * - encoding: set by user, can be NULL
1266 * - decoding: set by lavc
1267 */
1268 uint16_t *intra_matrix;
1269
1270 /**
1271 * custom inter quantization matrix
1272 * - encoding: set by user, can be NULL
1273 * - decoding: set by lavc
1274 */
1275 uint16_t *inter_matrix;
1276
1277 /**
1278 * fourcc from the AVI stream header (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1279 * this is used to workaround some encoder bugs
1280 * - encoding: unused
1281 * - decoding: set by user, will be converted to upper case by lavc during init
1282 */
1283 unsigned int stream_codec_tag;
1284
1285 /**
1286 * scene change detection threshold.
1287 * 0 is default, larger means fewer detected scene changes
1288 * - encoding: set by user.
1289 * - decoding: unused
1290 */
1291 int scenechange_threshold;
1292
1293 /**
1294 * minimum lagrange multipler
1295 * - encoding: set by user.
1296 * - decoding: unused
1297 */
1298 int lmin;
1299
1300 /**
1301 * maximum lagrange multipler
1302 * - encoding: set by user.
1303 * - decoding: unused
1304 */
1305 int lmax;
1306 } AVCodecContext;
1307
1308
1309 /**
1310 * AVOption.
1311 */
1312 typedef struct AVOption {
1313 /** options' name */
1314 const char *name; /* if name is NULL, it indicates a link to next */
1315 /** short English text help or const struct AVOption* subpointer */
1316 const char *help; // const struct AVOption* sub;
1317 /** offset to context structure where the parsed value should be stored */
1318 int offset;
1319 /** options' type */
1320 int type;
1321 #define FF_OPT_TYPE_BOOL 1 ///< boolean - true,1,on (or simply presence)
1322 #define FF_OPT_TYPE_DOUBLE 2 ///< double
1323 #define FF_OPT_TYPE_INT 3 ///< integer
1324 #define FF_OPT_TYPE_STRING 4 ///< string (finished with \0)
1325 #define FF_OPT_TYPE_MASK 0x1f ///< mask for types - upper bits are various flags
1326 //#define FF_OPT_TYPE_EXPERT 0x20 // flag for expert option
1327 #define FF_OPT_TYPE_FLAG (FF_OPT_TYPE_BOOL | 0x40)
1328 #define FF_OPT_TYPE_RCOVERRIDE (FF_OPT_TYPE_STRING | 0x80)
1329 /** min value (min == max -> no limits) */
1330 double min;
1331 /** maximum value for double/int */
1332 double max;
1333 /** default boo [0,1]l/double/int value */
1334 double defval;
1335 /**
1336 * default string value (with optional semicolon delimited extra option-list
1337 * i.e. option1;option2;option3
1338 * defval might select other then first argument as default
1339 */
1340 const char *defstr;
1341 #define FF_OPT_MAX_DEPTH 10
1342 } AVOption;
1343
1344 /**
1345 * Parse option(s) and sets fields in passed structure
1346 * @param strct structure where the parsed results will be written
1347 * @param list list with AVOptions
1348 * @param opts string with options for parsing
1349 */
1350 int avoption_parse(void* strct, const AVOption* list, const char* opts);
1351
1352
1353 /**
1354 * AVCodec.
1355 */
1356 typedef struct AVCodec {
1357 const char *name;
1358 enum CodecType type;
1359 int id;
1360 int priv_data_size;
1361 int (*init)(AVCodecContext *);
1362 int (*encode)(AVCodecContext *, uint8_t *buf, int buf_size, void *data);
1363 int (*close)(AVCodecContext *);
1364 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size,
1365 uint8_t *buf, int buf_size);
1366 int capabilities;
1367 const AVOption *options;
1368 struct AVCodec *next;
1369 void (*flush)(AVCodecContext *);
1370 } AVCodec;
1371
1372 /**
1373 * four components are given, that's all.
1374 * the last component is alpha
1375 */
1376 typedef struct AVPicture {
1377 uint8_t *data[4];
1378 int linesize[4]; ///< number of bytes per line
1379 } AVPicture;
1380
1381 /**
1382 * AVPaletteControl
1383 * This structure defines a method for communicating palette changes
1384 * between and demuxer and a decoder.
1385 */
1386 typedef struct AVPaletteControl {
1387
1388 /* demuxer sets this to 1 to indicate the palette has changed;
1389 * decoder resets to 0 */
1390 int palette_changed;
1391
1392 /* 256 3-byte RGB palette entries; the components should be
1393 * formatted in the buffer as "RGBRGB..." and should be scaled to
1394 * 8 bits if they originally represented 6-bit VGA palette
1395 * components */
1396 unsigned char palette[256 * 3];
1397
1398 } AVPaletteControl;
1399
1400 extern AVCodec ac3_encoder;
1401 extern AVCodec mp2_encoder;
1402 extern AVCodec mp3lame_encoder;
1403 extern AVCodec oggvorbis_encoder;
1404 extern AVCodec faac_encoder;
1405 extern AVCodec mpeg1video_encoder;
1406 extern AVCodec mpeg2video_encoder;
1407 extern AVCodec h263_encoder;
1408 extern AVCodec h263p_encoder;
1409 extern AVCodec flv_encoder;
1410 extern AVCodec rv10_encoder;
1411 extern AVCodec mjpeg_encoder;
1412 extern AVCodec ljpeg_encoder;
1413 extern AVCodec mpeg4_encoder;
1414 extern AVCodec msmpeg4v1_encoder;
1415 extern AVCodec msmpeg4v2_encoder;
1416 extern AVCodec msmpeg4v3_encoder;
1417 extern AVCodec wmv1_encoder;
1418 extern AVCodec wmv2_encoder;
1419 extern AVCodec huffyuv_encoder;
1420 extern AVCodec h264_encoder;
1421 extern AVCodec asv1_encoder;
1422 extern AVCodec asv2_encoder;
1423 extern AVCodec vcr1_encoder;
1424 extern AVCodec ffv1_encoder;
1425 extern AVCodec mdec_encoder;
1426
1427 extern AVCodec h263_decoder;
1428 extern AVCodec mpeg4_decoder;
1429 extern AVCodec msmpeg4v1_decoder;
1430 extern AVCodec msmpeg4v2_decoder;
1431 extern AVCodec msmpeg4v3_decoder;
1432 extern AVCodec wmv1_decoder;
1433 extern AVCodec wmv2_decoder;
1434 extern AVCodec mpeg1video_decoder;
1435 extern AVCodec mpeg2video_decoder;
1436 extern AVCodec mpeg_xvmc_decoder;
1437 extern AVCodec h263i_decoder;
1438 extern AVCodec flv_decoder;
1439 extern AVCodec rv10_decoder;
1440 extern AVCodec svq1_decoder;
1441 extern AVCodec svq3_decoder;
1442 extern AVCodec dvvideo_decoder;
1443 extern AVCodec wmav1_decoder;
1444 extern AVCodec wmav2_decoder;
1445 extern AVCodec mjpeg_decoder;
1446 extern AVCodec mjpegb_decoder;
1447 extern AVCodec sp5x_decoder;
1448 extern AVCodec mp2_decoder;
1449 extern AVCodec mp3_decoder;
1450 extern AVCodec mace3_decoder;
1451 extern AVCodec mace6_decoder;
1452 extern AVCodec huffyuv_decoder;
1453 extern AVCodec oggvorbis_decoder;
1454 extern AVCodec cyuv_decoder;
1455 extern AVCodec h264_decoder;
1456 extern AVCodec indeo3_decoder;
1457 extern AVCodec vp3_decoder;
1458 extern AVCodec theora_decoder;
1459 extern AVCodec amr_nb_decoder;
1460 extern AVCodec amr_nb_encoder;
1461 extern AVCodec amr_wb_encoder;
1462 extern AVCodec amr_wb_decoder;
1463 extern AVCodec aac_decoder;
1464 extern AVCodec mpeg4aac_decoder;
1465 extern AVCodec asv1_decoder;
1466 extern AVCodec asv2_decoder;
1467 extern AVCodec vcr1_decoder;
1468 extern AVCodec cljr_decoder;
1469 extern AVCodec ffv1_decoder;
1470 extern AVCodec fourxm_decoder;
1471 extern AVCodec mdec_decoder;
1472 extern AVCodec roq_decoder;
1473 extern AVCodec interplay_video_decoder;
1474 extern AVCodec xan_wc3_decoder;
1475 extern AVCodec rpza_decoder;
1476 extern AVCodec cinepak_decoder;
1477 extern AVCodec msrle_decoder;
1478 extern AVCodec msvideo1_decoder;
1479 extern AVCodec vqa_decoder;
1480 extern AVCodec idcin_decoder;
1481 extern AVCodec ra_144_decoder;
1482 extern AVCodec ra_288_decoder;
1483 extern AVCodec roq_dpcm_decoder;
1484 extern AVCodec interplay_dpcm_decoder;
1485 extern AVCodec xan_dpcm_decoder;
1486
1487 /* pcm codecs */
1488 #define PCM_CODEC(id, name) \
1489 extern AVCodec name ## _decoder; \
1490 extern AVCodec name ## _encoder
1491
1492 PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
1493 PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
1494 PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
1495 PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
1496 PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
1497 PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
1498 PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
1499 PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
1500
1501 /* adpcm codecs */
1502
1503 PCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
1504 PCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
1505 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
1506 PCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
1507 PCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
1508 PCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
1509 PCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
1510 PCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
1511 PCM_CODEC(CODEC_ID_ADPCM_ADX, adpcm_adx);
1512
1513 #undef PCM_CODEC
1514
1515 /* dummy raw video codec */
1516 extern AVCodec rawvideo_encoder;
1517 extern AVCodec rawvideo_decoder;
1518
1519 /* the following codecs use external GPL libs */
1520 extern AVCodec ac3_decoder;
1521
1522 /* resample.c */
1523
1524 struct ReSampleContext;
1525
1526 typedef struct ReSampleContext ReSampleContext;
1527
1528 ReSampleContext *audio_resample_init(int output_channels, int input_channels,
1529 int output_rate, int input_rate);
1530 int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples);
1531 void audio_resample_close(ReSampleContext *s);
1532
1533 /* YUV420 format is assumed ! */
1534
1535 struct ImgReSampleContext;
1536
1537 typedef struct ImgReSampleContext ImgReSampleContext;
1538
1539 ImgReSampleContext *img_resample_init(int output_width, int output_height,
1540 int input_width, int input_height);
1541
1542 ImgReSampleContext *img_resample_full_init(int owidth, int oheight,
1543 int iwidth, int iheight,
1544 int topBand, int bottomBand,
1545 int leftBand, int rightBand);
1546
1547 void img_resample(ImgReSampleContext *s,
1548 AVPicture *output, const AVPicture *input);
1549
1550 void img_resample_close(ImgReSampleContext *s);
1551
1552 /**
1553 * Allocate memory for a picture. Call avpicture_free to free it.
1554 *
1555 * @param picture the picture to be filled in.
1556 * @param pix_fmt the format of the picture.
1557 * @param width the width of the picture.
1558 * @param height the height of the picture.
1559 * @return 0 if successful, -1 if not.
1560 */
1561 int avpicture_alloc(AVPicture *picture, int pix_fmt, int width, int height);
1562
1563 /* Free a picture previously allocated by avpicture_alloc. */
1564 void avpicture_free(AVPicture *picture);
1565
1566 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
1567 int pix_fmt, int width, int height);
1568 int avpicture_layout(const AVPicture* src, int pix_fmt, int width, int height,
1569 unsigned char *dest, int dest_size);
1570 int avpicture_get_size(int pix_fmt, int width, int height);
1571 void avcodec_get_chroma_sub_sample(int pix_fmt, int *h_shift, int *v_shift);
1572 const char *avcodec_get_pix_fmt_name(int pix_fmt);
1573 enum PixelFormat avcodec_get_pix_fmt(const char* name);
1574
1575 #define FF_LOSS_RESOLUTION 0x0001 /* loss due to resolution change */
1576 #define FF_LOSS_DEPTH 0x0002 /* loss due to color depth change */
1577 #define FF_LOSS_COLORSPACE 0x0004 /* loss due to color space conversion */
1578 #define FF_LOSS_ALPHA 0x0008 /* loss of alpha bits */
1579 #define FF_LOSS_COLORQUANT 0x0010 /* loss due to color quantization */
1580 #define FF_LOSS_CHROMA 0x0020 /* loss of chroma (e.g. rgb to gray conversion) */
1581
1582 int avcodec_get_pix_fmt_loss(int dst_pix_fmt, int src_pix_fmt,
1583 int has_alpha);
1584 int avcodec_find_best_pix_fmt(int pix_fmt_mask, int src_pix_fmt,
1585 int has_alpha, int *loss_ptr);
1586
1587 #define FF_ALPHA_TRANSP 0x0001 /* image has some totally transparent pixels */
1588 #define FF_ALPHA_SEMI_TRANSP 0x0002 /* image has some transparent pixels */
1589 int img_get_alpha_info(const AVPicture *src,
1590 int pix_fmt, int width, int height);
1591
1592 /* convert among pixel formats */
1593 int img_convert(AVPicture *dst, int dst_pix_fmt,
1594 const AVPicture *src, int pix_fmt,
1595 int width, int height);
1596
1597 /* deinterlace a picture */
1598 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1599 int pix_fmt, int width, int height);
1600
1601 /* external high level API */
1602
1603 extern AVCodec *first_avcodec;
1604
1605 /* returns LIBAVCODEC_VERSION_INT constant */
1606 unsigned avcodec_version(void);
1607 /* returns LIBAVCODEC_BUILD constant */
1608 unsigned avcodec_build(void);
1609 void avcodec_init(void);
1610
1611 void register_avcodec(AVCodec *format);
1612 AVCodec *avcodec_find_encoder(enum CodecID id);
1613 AVCodec *avcodec_find_encoder_by_name(const char *name);
1614 AVCodec *avcodec_find_decoder(enum CodecID id);
1615 AVCodec *avcodec_find_decoder_by_name(const char *name);
1616 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
1617
1618 void avcodec_get_context_defaults(AVCodecContext *s);
1619 AVCodecContext *avcodec_alloc_context(void);
1620 AVFrame *avcodec_alloc_frame(void);
1621
1622 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic);
1623 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic);
1624 void avcodec_default_free_buffers(AVCodecContext *s);
1625
1626 /**
1627 * opens / inits the AVCodecContext.
1628 * not thread save!
1629 */
1630 int avcodec_open(AVCodecContext *avctx, AVCodec *codec);
1631
1632 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
1633 int *frame_size_ptr,
1634 uint8_t *buf, int buf_size);
1635 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
1636 int *got_picture_ptr,
1637 uint8_t *buf, int buf_size);
1638 int avcodec_parse_frame(AVCodecContext *avctx, uint8_t **pdata,
1639 int *data_size_ptr,
1640 uint8_t *buf, int buf_size);
1641 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1642 const short *samples);
1643 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1644 const AVFrame *pict);
1645
1646 int avcodec_close(AVCodecContext *avctx);
1647
1648 void avcodec_register_all(void);
1649
1650 void avcodec_flush_buffers(AVCodecContext *avctx);
1651
1652 /* misc usefull functions */
1653
1654 /**
1655 * returns a single letter to describe the picture type
1656 */
1657 char av_get_pict_type_char(int pict_type);
1658
1659 /**
1660 * reduce a fraction.
1661 * this is usefull for framerate calculations
1662 * @param max the maximum allowed for dst_nom & dst_den
1663 * @return 1 if exact, 0 otherwise
1664 */
1665 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
1666
1667 /**
1668 * rescale a 64bit integer.
1669 * a simple a*b/c isnt possible as it can overflow
1670 */
1671 int64_t av_rescale(int64_t a, int b, int c);
1672
1673
1674 /**
1675 * Interface for 0.5.0 version
1676 *
1677 * do not even think about it's usage for this moment
1678 */
1679
1680 typedef struct {
1681 /// compressed size used from given memory buffer
1682 int size;
1683 /// I/P/B frame type
1684 int frame_type;
1685 } avc_enc_result_t;
1686
1687 /**
1688 * Commands
1689 * order can't be changed - once it was defined
1690 */
1691 typedef enum {
1692 // general commands
1693 AVC_OPEN_BY_NAME = 0xACA000,
1694 AVC_OPEN_BY_CODEC_ID,
1695 AVC_OPEN_BY_FOURCC,
1696 AVC_CLOSE,
1697
1698 AVC_FLUSH,
1699 // pin - struct { uint8_t* src, uint_t src_size }
1700 // pout - struct { AVPicture* img, consumed_bytes,
1701 AVC_DECODE,
1702 // pin - struct { AVPicture* img, uint8_t* dest, uint_t dest_size }
1703 // pout - uint_t used_from_dest_size
1704 AVC_ENCODE,
1705
1706 // query/get video commands
1707 AVC_GET_VERSION = 0xACB000,
1708 AVC_GET_WIDTH,
1709 AVC_GET_HEIGHT,
1710 AVC_GET_DELAY,
1711 AVC_GET_QUANT_TABLE,
1712 // ...
1713
1714 // query/get audio commands
1715 AVC_GET_FRAME_SIZE = 0xABC000,
1716
1717 // maybe define some simple structure which
1718 // might be passed to the user - but they can't
1719 // contain any codec specific parts and these
1720 // calls are usualy necessary only few times
1721
1722 // set video commands
1723 AVC_SET_WIDTH = 0xACD000,
1724 AVC_SET_HEIGHT,
1725
1726 // set video encoding commands
1727 AVC_SET_FRAME_RATE = 0xACD800,
1728 AVC_SET_QUALITY,
1729 AVC_SET_HURRY_UP,
1730
1731 // set audio commands
1732 AVC_SET_SAMPLE_RATE = 0xACE000,
1733 AVC_SET_CHANNELS,
1734
1735 } avc_cmd_t;
1736
1737 /**
1738 * \param handle allocated private structure by libavcodec
1739 * for initialization pass NULL - will be returned pout
1740 * user is supposed to know nothing about its structure
1741 * \param cmd type of operation to be performed
1742 * \param pint input parameter
1743 * \param pout output parameter
1744 *
1745 * \returns command status - eventually for query command it might return
1746 * integer resulting value
1747 */
1748 int avcodec(void* handle, avc_cmd_t cmd, void* pin, void* pout);
1749
1750 /* memory */
1751 void *av_malloc(unsigned int size);
1752 void *av_mallocz(unsigned int size);
1753 void *av_realloc(void *ptr, unsigned int size);
1754 void av_free(void *ptr);
1755 char *av_strdup(const char *s);
1756 void __av_freep(void **ptr);
1757 #define av_freep(p) __av_freep((void **)(p))
1758 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size);
1759 /* for static data only */
1760 /* call av_free_static to release all staticaly allocated tables */
1761 void av_free_static(void);
1762 void *__av_mallocz_static(void** location, unsigned int size);
1763 #define av_mallocz_static(p, s) __av_mallocz_static((void **)(p), s)
1764
1765 /* add by bero : in adx.c */
1766 int is_adx(const unsigned char *buf,size_t bufsize);
1767
1768 #ifdef __cplusplus
1769 }
1770 #endif
1771
1772 #endif /* AVCODEC_H */