* Introducing IIDC1394 grabbing interface.
[libav.git] / libavcodec / utils.c
1 /*
2 * utils for libavcodec
3 * Copyright (c) 2001 Fabrice Bellard.
4 * Copyright (c) 2003 Michel Bardiaux for the av_log API
5 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22 /**
23 * @file utils.c
24 * utils.
25 */
26
27 #include "avcodec.h"
28 #include "dsputil.h"
29 #include "mpegvideo.h"
30 #include "integer.h"
31 #include <stdarg.h>
32 #include <limits.h>
33
34 void avcodec_default_free_buffers(AVCodecContext *s);
35
36 void *av_mallocz(unsigned int size)
37 {
38 void *ptr;
39
40 ptr = av_malloc(size);
41 if (!ptr)
42 return NULL;
43 memset(ptr, 0, size);
44 return ptr;
45 }
46
47 char *av_strdup(const char *s)
48 {
49 char *ptr;
50 int len;
51 len = strlen(s) + 1;
52 ptr = av_malloc(len);
53 if (!ptr)
54 return NULL;
55 memcpy(ptr, s, len);
56 return ptr;
57 }
58
59 /**
60 * realloc which does nothing if the block is large enough
61 */
62 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
63 {
64 if(min_size < *size)
65 return ptr;
66
67 *size= 17*min_size/16 + 32;
68
69 return av_realloc(ptr, *size);
70 }
71
72
73 static unsigned int last_static = 0;
74 static unsigned int allocated_static = 0;
75 static void** array_static = NULL;
76
77 /**
78 * allocation of static arrays - do not use for normal allocation.
79 */
80 void *av_mallocz_static(unsigned int size)
81 {
82 void *ptr = av_mallocz(size);
83
84 if(ptr){
85 array_static =av_fast_realloc(array_static, &allocated_static, sizeof(void*)*(last_static+1));
86 array_static[last_static++] = ptr;
87 }
88
89 return ptr;
90 }
91
92 /**
93 * free all static arrays and reset pointers to 0.
94 */
95 void av_free_static(void)
96 {
97 while(last_static){
98 av_freep(&array_static[--last_static]);
99 }
100 av_freep(&array_static);
101 }
102
103 /**
104 * Frees memory and sets the pointer to NULL.
105 * @param arg pointer to the pointer which should be freed
106 */
107 void av_freep(void *arg)
108 {
109 void **ptr= (void**)arg;
110 av_free(*ptr);
111 *ptr = NULL;
112 }
113
114 /* encoder management */
115 AVCodec *first_avcodec = NULL;
116
117 void register_avcodec(AVCodec *format)
118 {
119 AVCodec **p;
120 p = &first_avcodec;
121 while (*p != NULL) p = &(*p)->next;
122 *p = format;
123 format->next = NULL;
124 }
125
126 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
127 s->coded_width = width;
128 s->coded_height= height;
129 s->width = -((-width )>>s->lowres);
130 s->height= -((-height)>>s->lowres);
131 }
132
133 typedef struct InternalBuffer{
134 int last_pic_num;
135 uint8_t *base[4];
136 uint8_t *data[4];
137 int linesize[4];
138 }InternalBuffer;
139
140 #define INTERNAL_BUFFER_SIZE 32
141
142 #define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
143
144 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
145 int w_align= 1;
146 int h_align= 1;
147
148 switch(s->pix_fmt){
149 case PIX_FMT_YUV420P:
150 case PIX_FMT_YUV422:
151 case PIX_FMT_UYVY422:
152 case PIX_FMT_YUV422P:
153 case PIX_FMT_YUV444P:
154 case PIX_FMT_GRAY8:
155 case PIX_FMT_YUVJ420P:
156 case PIX_FMT_YUVJ422P:
157 case PIX_FMT_YUVJ444P:
158 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
159 h_align= 16;
160 break;
161 case PIX_FMT_YUV411P:
162 case PIX_FMT_UYVY411:
163 w_align=32;
164 h_align=8;
165 break;
166 case PIX_FMT_YUV410P:
167 if(s->codec_id == CODEC_ID_SVQ1){
168 w_align=64;
169 h_align=64;
170 }
171 case PIX_FMT_RGB555:
172 if(s->codec_id == CODEC_ID_RPZA){
173 w_align=4;
174 h_align=4;
175 }
176 case PIX_FMT_PAL8:
177 if(s->codec_id == CODEC_ID_SMC){
178 w_align=4;
179 h_align=4;
180 }
181 break;
182 default:
183 w_align= 1;
184 h_align= 1;
185 break;
186 }
187
188 *width = ALIGN(*width , w_align);
189 *height= ALIGN(*height, h_align);
190 }
191
192 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
193 int i;
194 int w= s->width;
195 int h= s->height;
196 InternalBuffer *buf;
197 int *picture_number;
198
199 assert(pic->data[0]==NULL);
200 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
201
202 if(s->internal_buffer==NULL){
203 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
204 }
205 #if 0
206 s->internal_buffer= av_fast_realloc(
207 s->internal_buffer,
208 &s->internal_buffer_size,
209 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
210 );
211 #endif
212
213 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
214 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
215 (*picture_number)++;
216
217 if(buf->base[0]){
218 pic->age= *picture_number - buf->last_pic_num;
219 buf->last_pic_num= *picture_number;
220 }else{
221 int h_chroma_shift, v_chroma_shift;
222 int s_align, pixel_size;
223
224 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
225
226 switch(s->pix_fmt){
227 case PIX_FMT_RGB555:
228 case PIX_FMT_RGB565:
229 case PIX_FMT_YUV422:
230 case PIX_FMT_UYVY422:
231 pixel_size=2;
232 break;
233 case PIX_FMT_RGB24:
234 case PIX_FMT_BGR24:
235 pixel_size=3;
236 break;
237 case PIX_FMT_RGBA32:
238 pixel_size=4;
239 break;
240 default:
241 pixel_size=1;
242 }
243
244 avcodec_align_dimensions(s, &w, &h);
245 #if defined(ARCH_POWERPC) || defined(HAVE_MMI) //FIXME some cleaner check
246 s_align= 16;
247 #else
248 s_align= 8;
249 #endif
250
251 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
252 w+= EDGE_WIDTH*2;
253 h+= EDGE_WIDTH*2;
254 }
255
256 buf->last_pic_num= -256*256*256*64;
257
258 for(i=0; i<3; i++){
259 const int h_shift= i==0 ? 0 : h_chroma_shift;
260 const int v_shift= i==0 ? 0 : v_chroma_shift;
261
262 //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
263 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, s_align<<(h_chroma_shift-h_shift));
264
265 buf->base[i]= av_mallocz((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
266 if(buf->base[i]==NULL) return -1;
267 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
268
269 if(s->flags&CODEC_FLAG_EMU_EDGE)
270 buf->data[i] = buf->base[i];
271 else
272 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), s_align);
273 }
274 pic->age= 256*256*256*64;
275 }
276 pic->type= FF_BUFFER_TYPE_INTERNAL;
277
278 for(i=0; i<4; i++){
279 pic->base[i]= buf->base[i];
280 pic->data[i]= buf->data[i];
281 pic->linesize[i]= buf->linesize[i];
282 }
283 s->internal_buffer_count++;
284
285 return 0;
286 }
287
288 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
289 int i;
290 InternalBuffer *buf, *last, temp;
291
292 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
293 assert(s->internal_buffer_count);
294
295 buf = NULL; /* avoids warning */
296 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
297 buf= &((InternalBuffer*)s->internal_buffer)[i];
298 if(buf->data[0] == pic->data[0])
299 break;
300 }
301 assert(i < s->internal_buffer_count);
302 s->internal_buffer_count--;
303 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
304
305 temp= *buf;
306 *buf= *last;
307 *last= temp;
308
309 for(i=0; i<3; i++){
310 pic->data[i]=NULL;
311 // pic->base[i]=NULL;
312 }
313 //printf("R%X\n", pic->opaque);
314 }
315
316 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
317 AVFrame temp_pic;
318 int i;
319
320 /* If no picture return a new buffer */
321 if(pic->data[0] == NULL) {
322 /* We will copy from buffer, so must be readable */
323 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
324 return s->get_buffer(s, pic);
325 }
326
327 /* If internal buffer type return the same buffer */
328 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
329 return 0;
330
331 /*
332 * Not internal type and reget_buffer not overridden, emulate cr buffer
333 */
334 temp_pic = *pic;
335 for(i = 0; i < 4; i++)
336 pic->data[i] = pic->base[i] = NULL;
337 pic->opaque = NULL;
338 /* Allocate new frame */
339 if (s->get_buffer(s, pic))
340 return -1;
341 /* Copy image data from old buffer to new buffer */
342 img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
343 s->height);
344 s->release_buffer(s, &temp_pic); // Release old frame
345 return 0;
346 }
347
348 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
349 int i;
350
351 for(i=0; i<count; i++){
352 int r= func(c, arg[i]);
353 if(ret) ret[i]= r;
354 }
355 return 0;
356 }
357
358 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
359 return fmt[0];
360 }
361
362 static const char* context_to_name(void* ptr) {
363 AVCodecContext *avc= ptr;
364
365 if(avc && avc->codec && avc->codec->name)
366 return avc->codec->name;
367 else
368 return "NULL";
369 }
370
371 static AVClass av_codec_context_class = { "AVCodecContext", context_to_name };
372
373 void avcodec_get_context_defaults(AVCodecContext *s){
374 memset(s, 0, sizeof(AVCodecContext));
375
376 s->av_class= &av_codec_context_class;
377 s->bit_rate= 800*1000;
378 s->bit_rate_tolerance= s->bit_rate*10;
379 s->qmin= 2;
380 s->qmax= 31;
381 s->mb_qmin= 2;
382 s->mb_qmax= 31;
383 s->rc_eq= "tex^qComp";
384 s->qcompress= 0.5;
385 s->max_qdiff= 3;
386 s->b_quant_factor=1.25;
387 s->b_quant_offset=1.25;
388 s->i_quant_factor=-0.8;
389 s->i_quant_offset=0.0;
390 s->error_concealment= 3;
391 s->error_resilience= 1;
392 s->workaround_bugs= FF_BUG_AUTODETECT;
393 s->frame_rate_base= 1;
394 s->frame_rate = 25;
395 s->gop_size= 50;
396 s->me_method= ME_EPZS;
397 s->get_buffer= avcodec_default_get_buffer;
398 s->release_buffer= avcodec_default_release_buffer;
399 s->get_format= avcodec_default_get_format;
400 s->execute= avcodec_default_execute;
401 s->thread_count=1;
402 s->me_subpel_quality=8;
403 s->lmin= FF_QP2LAMBDA * s->qmin;
404 s->lmax= FF_QP2LAMBDA * s->qmax;
405 s->sample_aspect_ratio= (AVRational){0,1};
406 s->ildct_cmp= FF_CMP_VSAD;
407 s->profile= FF_PROFILE_UNKNOWN;
408 s->level= FF_LEVEL_UNKNOWN;
409
410 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
411 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
412 s->palctrl = NULL;
413 s->reget_buffer= avcodec_default_reget_buffer;
414 }
415
416 /**
417 * allocates a AVCodecContext and set it to defaults.
418 * this can be deallocated by simply calling free()
419 */
420 AVCodecContext *avcodec_alloc_context(void){
421 AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
422
423 if(avctx==NULL) return NULL;
424
425 avcodec_get_context_defaults(avctx);
426
427 return avctx;
428 }
429
430 void avcodec_get_frame_defaults(AVFrame *pic){
431 memset(pic, 0, sizeof(AVFrame));
432
433 pic->pts= AV_NOPTS_VALUE;
434 }
435
436 /**
437 * allocates a AVPFrame and set it to defaults.
438 * this can be deallocated by simply calling free()
439 */
440 AVFrame *avcodec_alloc_frame(void){
441 AVFrame *pic= av_malloc(sizeof(AVFrame));
442
443 if(pic==NULL) return NULL;
444
445 avcodec_get_frame_defaults(pic);
446
447 return pic;
448 }
449
450 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
451 {
452 int ret;
453
454 if(avctx->codec)
455 return -1;
456
457 avctx->codec = codec;
458 avctx->codec_id = codec->id;
459 avctx->frame_number = 0;
460 if (codec->priv_data_size > 0) {
461 avctx->priv_data = av_mallocz(codec->priv_data_size);
462 if (!avctx->priv_data)
463 return -ENOMEM;
464 } else {
465 avctx->priv_data = NULL;
466 }
467
468 if(avctx->coded_width && avctx->coded_height)
469 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
470 else if(avctx->width && avctx->height)
471 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
472
473 ret = avctx->codec->init(avctx);
474 if (ret < 0) {
475 av_freep(&avctx->priv_data);
476 return ret;
477 }
478 return 0;
479 }
480
481 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
482 const short *samples)
483 {
484 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
485 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
486 avctx->frame_number++;
487 return ret;
488 }else
489 return 0;
490 }
491
492 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
493 const AVFrame *pict)
494 {
495 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
496 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
497 avctx->frame_number++;
498 emms_c(); //needed to avoid a emms_c() call before every return;
499
500 return ret;
501 }else
502 return 0;
503 }
504
505 /**
506 * decode a frame.
507 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
508 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
509 * @param buf_size the size of the buffer in bytes
510 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
511 * @return -1 if error, otherwise return the number of
512 * bytes used.
513 */
514 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
515 int *got_picture_ptr,
516 uint8_t *buf, int buf_size)
517 {
518 int ret;
519
520 *got_picture_ptr= 0;
521 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
522 buf, buf_size);
523
524 emms_c(); //needed to avoid a emms_c() call before every return;
525
526 if (*got_picture_ptr)
527 avctx->frame_number++;
528 return ret;
529 }
530
531 /* decode an audio frame. return -1 if error, otherwise return the
532 *number of bytes used. If no frame could be decompressed,
533 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
534 *size in BYTES. */
535 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
536 int *frame_size_ptr,
537 uint8_t *buf, int buf_size)
538 {
539 int ret;
540
541 *frame_size_ptr= 0;
542 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
543 buf, buf_size);
544 avctx->frame_number++;
545 return ret;
546 }
547
548 int avcodec_close(AVCodecContext *avctx)
549 {
550 if (avctx->codec->close)
551 avctx->codec->close(avctx);
552 avcodec_default_free_buffers(avctx);
553 av_freep(&avctx->priv_data);
554 avctx->codec = NULL;
555 return 0;
556 }
557
558 AVCodec *avcodec_find_encoder(enum CodecID id)
559 {
560 AVCodec *p;
561 p = first_avcodec;
562 while (p) {
563 if (p->encode != NULL && p->id == id)
564 return p;
565 p = p->next;
566 }
567 return NULL;
568 }
569
570 AVCodec *avcodec_find_encoder_by_name(const char *name)
571 {
572 AVCodec *p;
573 p = first_avcodec;
574 while (p) {
575 if (p->encode != NULL && strcmp(name,p->name) == 0)
576 return p;
577 p = p->next;
578 }
579 return NULL;
580 }
581
582 AVCodec *avcodec_find_decoder(enum CodecID id)
583 {
584 AVCodec *p;
585 p = first_avcodec;
586 while (p) {
587 if (p->decode != NULL && p->id == id)
588 return p;
589 p = p->next;
590 }
591 return NULL;
592 }
593
594 AVCodec *avcodec_find_decoder_by_name(const char *name)
595 {
596 AVCodec *p;
597 p = first_avcodec;
598 while (p) {
599 if (p->decode != NULL && strcmp(name,p->name) == 0)
600 return p;
601 p = p->next;
602 }
603 return NULL;
604 }
605
606 static AVCodec *avcodec_find(enum CodecID id)
607 {
608 AVCodec *p;
609 p = first_avcodec;
610 while (p) {
611 if (p->id == id)
612 return p;
613 p = p->next;
614 }
615 return NULL;
616 }
617
618 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
619 {
620 const char *codec_name;
621 AVCodec *p;
622 char buf1[32];
623 char channels_str[100];
624 int bitrate;
625
626 if (encode)
627 p = avcodec_find_encoder(enc->codec_id);
628 else
629 p = avcodec_find_decoder(enc->codec_id);
630
631 if (p) {
632 codec_name = p->name;
633 if (!encode && enc->codec_id == CODEC_ID_MP3) {
634 if (enc->sub_id == 2)
635 codec_name = "mp2";
636 else if (enc->sub_id == 1)
637 codec_name = "mp1";
638 }
639 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
640 /* fake mpeg2 transport stream codec (currently not
641 registered) */
642 codec_name = "mpeg2ts";
643 } else if (enc->codec_name[0] != '\0') {
644 codec_name = enc->codec_name;
645 } else {
646 /* output avi tags */
647 if (enc->codec_type == CODEC_TYPE_VIDEO) {
648 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
649 enc->codec_tag & 0xff,
650 (enc->codec_tag >> 8) & 0xff,
651 (enc->codec_tag >> 16) & 0xff,
652 (enc->codec_tag >> 24) & 0xff);
653 } else {
654 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
655 }
656 codec_name = buf1;
657 }
658
659 switch(enc->codec_type) {
660 case CODEC_TYPE_VIDEO:
661 snprintf(buf, buf_size,
662 "Video: %s%s",
663 codec_name, enc->mb_decision ? " (hq)" : "");
664 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
665 snprintf(buf + strlen(buf), buf_size - strlen(buf),
666 ", %s",
667 avcodec_get_pix_fmt_name(enc->pix_fmt));
668 }
669 if (enc->width) {
670 snprintf(buf + strlen(buf), buf_size - strlen(buf),
671 ", %dx%d, %0.2f fps",
672 enc->width, enc->height,
673 (float)enc->frame_rate / enc->frame_rate_base);
674 }
675 if (encode) {
676 snprintf(buf + strlen(buf), buf_size - strlen(buf),
677 ", q=%d-%d", enc->qmin, enc->qmax);
678 }
679 bitrate = enc->bit_rate;
680 break;
681 case CODEC_TYPE_AUDIO:
682 snprintf(buf, buf_size,
683 "Audio: %s",
684 codec_name);
685 switch (enc->channels) {
686 case 1:
687 strcpy(channels_str, "mono");
688 break;
689 case 2:
690 strcpy(channels_str, "stereo");
691 break;
692 case 6:
693 strcpy(channels_str, "5:1");
694 break;
695 default:
696 sprintf(channels_str, "%d channels", enc->channels);
697 break;
698 }
699 if (enc->sample_rate) {
700 snprintf(buf + strlen(buf), buf_size - strlen(buf),
701 ", %d Hz, %s",
702 enc->sample_rate,
703 channels_str);
704 }
705
706 /* for PCM codecs, compute bitrate directly */
707 switch(enc->codec_id) {
708 case CODEC_ID_PCM_S16LE:
709 case CODEC_ID_PCM_S16BE:
710 case CODEC_ID_PCM_U16LE:
711 case CODEC_ID_PCM_U16BE:
712 bitrate = enc->sample_rate * enc->channels * 16;
713 break;
714 case CODEC_ID_PCM_S8:
715 case CODEC_ID_PCM_U8:
716 case CODEC_ID_PCM_ALAW:
717 case CODEC_ID_PCM_MULAW:
718 bitrate = enc->sample_rate * enc->channels * 8;
719 break;
720 default:
721 bitrate = enc->bit_rate;
722 break;
723 }
724 break;
725 case CODEC_TYPE_DATA:
726 snprintf(buf, buf_size, "Data: %s", codec_name);
727 bitrate = enc->bit_rate;
728 break;
729 default:
730 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
731 return;
732 }
733 if (encode) {
734 if (enc->flags & CODEC_FLAG_PASS1)
735 snprintf(buf + strlen(buf), buf_size - strlen(buf),
736 ", pass 1");
737 if (enc->flags & CODEC_FLAG_PASS2)
738 snprintf(buf + strlen(buf), buf_size - strlen(buf),
739 ", pass 2");
740 }
741 if (bitrate != 0) {
742 snprintf(buf + strlen(buf), buf_size - strlen(buf),
743 ", %d kb/s", bitrate / 1000);
744 }
745 }
746
747 unsigned avcodec_version( void )
748 {
749 return LIBAVCODEC_VERSION_INT;
750 }
751
752 unsigned avcodec_build( void )
753 {
754 return LIBAVCODEC_BUILD;
755 }
756
757 /* must be called before any other functions */
758 void avcodec_init(void)
759 {
760 static int inited = 0;
761
762 if (inited != 0)
763 return;
764 inited = 1;
765
766 dsputil_static_init();
767 }
768
769 /**
770 * Flush buffers, should be called when seeking or when swicthing to a different stream.
771 */
772 void avcodec_flush_buffers(AVCodecContext *avctx)
773 {
774 if(avctx->codec->flush)
775 avctx->codec->flush(avctx);
776 }
777
778 void avcodec_default_free_buffers(AVCodecContext *s){
779 int i, j;
780
781 if(s->internal_buffer==NULL) return;
782
783 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
784 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
785 for(j=0; j<4; j++){
786 av_freep(&buf->base[j]);
787 buf->data[j]= NULL;
788 }
789 }
790 av_freep(&s->internal_buffer);
791
792 s->internal_buffer_count=0;
793 }
794
795 char av_get_pict_type_char(int pict_type){
796 switch(pict_type){
797 case I_TYPE: return 'I';
798 case P_TYPE: return 'P';
799 case B_TYPE: return 'B';
800 case S_TYPE: return 'S';
801 case SI_TYPE:return 'i';
802 case SP_TYPE:return 'p';
803 default: return '?';
804 }
805 }
806
807 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
808 AVRational a0={0,1}, a1={1,0};
809 int sign= (nom<0) ^ (den<0);
810 int64_t gcd= ff_gcd(ABS(nom), ABS(den));
811
812 nom = ABS(nom)/gcd;
813 den = ABS(den)/gcd;
814 if(nom<=max && den<=max){
815 a1= (AVRational){nom, den};
816 den=0;
817 }
818
819 while(den){
820 int64_t x = nom / den;
821 int64_t next_den= nom - den*x;
822 int64_t a2n= x*a1.num + a0.num;
823 int64_t a2d= x*a1.den + a0.den;
824
825 if(a2n > max || a2d > max) break;
826
827 a0= a1;
828 a1= (AVRational){a2n, a2d};
829 nom= den;
830 den= next_den;
831 }
832 assert(ff_gcd(a1.num, a1.den) == 1);
833
834 *dst_nom = sign ? -a1.num : a1.num;
835 *dst_den = a1.den;
836
837 return den==0;
838 }
839
840 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd){
841 AVInteger ai;
842 int64_t r=0;
843 assert(c > 0);
844 assert(b >=0);
845 assert(rnd >=0 && rnd<=5 && rnd!=4);
846
847 if(a<0 && a != INT64_MIN) return -av_rescale_rnd(-a, b, c, rnd ^ ((rnd>>1)&1));
848
849 if(rnd==AV_ROUND_NEAR_INF) r= c/2;
850 else if(rnd&1) r= c-1;
851
852 if(b<=INT_MAX && c<=INT_MAX){
853 if(a<=INT_MAX)
854 return (a * b + r)/c;
855 else
856 return a/c*b + (a%c*b + r)/c;
857 }
858
859 ai= av_mul_i(av_int2i(a), av_int2i(b));
860 ai= av_add_i(ai, av_int2i(r));
861
862 return av_i2int(av_div_i(ai, av_int2i(c)));
863 }
864
865 int64_t av_rescale(int64_t a, int64_t b, int64_t c){
866 return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF);
867 }
868
869 /* av_log API */
870
871 static int av_log_level = AV_LOG_DEBUG;
872
873 static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
874 {
875 static int print_prefix=1;
876 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
877 if(level>av_log_level)
878 return;
879 #undef fprintf
880 if(print_prefix && avc) {
881 fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
882 }
883 #define fprintf please_use_av_log
884
885 print_prefix= strstr(fmt, "\n") != NULL;
886
887 vfprintf(stderr, fmt, vl);
888 }
889
890 static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
891
892 void av_log(void* avcl, int level, const char *fmt, ...)
893 {
894 va_list vl;
895 va_start(vl, fmt);
896 av_vlog(avcl, level, fmt, vl);
897 va_end(vl);
898 }
899
900 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
901 {
902 av_log_callback(avcl, level, fmt, vl);
903 }
904
905 int av_log_get_level(void)
906 {
907 return av_log_level;
908 }
909
910 void av_log_set_level(int level)
911 {
912 av_log_level = level;
913 }
914
915 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
916 {
917 av_log_callback = callback;
918 }
919
920 #if !defined(HAVE_PTHREADS) && !defined(HAVE_W32THREADS)
921 int avcodec_thread_init(AVCodecContext *s, int thread_count){
922 return -1;
923 }
924 #endif