0b0c562deb23fb3a3e4db235a24f73e8a5e7b670
[libav.git] / libavcodec / utils.c
1 /*
2 * utils for libavcodec
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file libavcodec/utils.c
25 * utils.
26 */
27
28 /* needed for mkstemp() */
29 #define _XOPEN_SOURCE 600
30
31 #include "libavutil/avstring.h"
32 #include "libavutil/integer.h"
33 #include "libavutil/crc.h"
34 #include "avcodec.h"
35 #include "dsputil.h"
36 #include "opt.h"
37 #include "imgconvert.h"
38 #include "audioconvert.h"
39 #include "internal.h"
40 #include <stdlib.h>
41 #include <stdarg.h>
42 #include <limits.h>
43 #include <float.h>
44 #if !HAVE_MKSTEMP
45 #include <fcntl.h>
46 #endif
47
48 static int volatile entangled_thread_counter=0;
49 int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
50 static void *codec_mutex;
51
52 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
53 {
54 if(min_size < *size)
55 return ptr;
56
57 *size= FFMAX(17*min_size/16 + 32, min_size);
58
59 ptr= av_realloc(ptr, *size);
60 if(!ptr) //we could set this to the unmodified min_size but this is safer if the user lost the ptr and uses NULL now
61 *size= 0;
62
63 return ptr;
64 }
65
66 void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
67 {
68 void **p = ptr;
69 if (min_size < *size)
70 return;
71 *size= FFMAX(17*min_size/16 + 32, min_size);
72 av_free(*p);
73 *p = av_malloc(*size);
74 if (!*p) *size = 0;
75 }
76
77 /* encoder management */
78 static AVCodec *first_avcodec = NULL;
79
80 AVCodec *av_codec_next(AVCodec *c){
81 if(c) return c->next;
82 else return first_avcodec;
83 }
84
85 void avcodec_register(AVCodec *codec)
86 {
87 AVCodec **p;
88 avcodec_init();
89 p = &first_avcodec;
90 while (*p != NULL) p = &(*p)->next;
91 *p = codec;
92 codec->next = NULL;
93 }
94
95 #if LIBAVCODEC_VERSION_MAJOR < 53
96 void register_avcodec(AVCodec *codec)
97 {
98 avcodec_register(codec);
99 }
100 #endif
101
102 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
103 s->coded_width = width;
104 s->coded_height= height;
105 s->width = -((-width )>>s->lowres);
106 s->height= -((-height)>>s->lowres);
107 }
108
109 typedef struct InternalBuffer{
110 int last_pic_num;
111 uint8_t *base[4];
112 uint8_t *data[4];
113 int linesize[4];
114 int width, height;
115 enum PixelFormat pix_fmt;
116 }InternalBuffer;
117
118 #define INTERNAL_BUFFER_SIZE 32
119
120 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
121 int w_align= 1;
122 int h_align= 1;
123
124 switch(s->pix_fmt){
125 case PIX_FMT_YUV420P:
126 case PIX_FMT_YUYV422:
127 case PIX_FMT_UYVY422:
128 case PIX_FMT_YUV422P:
129 case PIX_FMT_YUV440P:
130 case PIX_FMT_YUV444P:
131 case PIX_FMT_GRAY8:
132 case PIX_FMT_GRAY16BE:
133 case PIX_FMT_GRAY16LE:
134 case PIX_FMT_YUVJ420P:
135 case PIX_FMT_YUVJ422P:
136 case PIX_FMT_YUVJ440P:
137 case PIX_FMT_YUVJ444P:
138 case PIX_FMT_YUVA420P:
139 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
140 h_align= 16;
141 if(s->codec_id == CODEC_ID_MPEG2VIDEO || s->codec_id == CODEC_ID_MJPEG || s->codec_id == CODEC_ID_AMV || s->codec_id == CODEC_ID_THP)
142 h_align= 32; // interlaced is rounded up to 2 MBs
143 break;
144 case PIX_FMT_YUV411P:
145 case PIX_FMT_UYYVYY411:
146 w_align=32;
147 h_align=8;
148 break;
149 case PIX_FMT_YUV410P:
150 if(s->codec_id == CODEC_ID_SVQ1){
151 w_align=64;
152 h_align=64;
153 }
154 case PIX_FMT_RGB555:
155 if(s->codec_id == CODEC_ID_RPZA){
156 w_align=4;
157 h_align=4;
158 }
159 case PIX_FMT_PAL8:
160 case PIX_FMT_BGR8:
161 case PIX_FMT_RGB8:
162 if(s->codec_id == CODEC_ID_SMC){
163 w_align=4;
164 h_align=4;
165 }
166 break;
167 case PIX_FMT_BGR24:
168 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
169 w_align=4;
170 h_align=4;
171 }
172 break;
173 default:
174 w_align= 1;
175 h_align= 1;
176 break;
177 }
178
179 *width = FFALIGN(*width , w_align);
180 *height= FFALIGN(*height, h_align);
181 if(s->codec_id == CODEC_ID_H264)
182 *height+=2; // some of the optimized chroma MC reads one line too much
183 }
184
185 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
186 if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
187 return 0;
188
189 av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
190 return -1;
191 }
192
193 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
194 int i;
195 int w= s->width;
196 int h= s->height;
197 InternalBuffer *buf;
198 int *picture_number;
199
200 if(pic->data[0]!=NULL) {
201 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
202 return -1;
203 }
204 if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
205 av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
206 return -1;
207 }
208
209 if(avcodec_check_dimensions(s,w,h))
210 return -1;
211
212 if(s->internal_buffer==NULL){
213 s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
214 }
215 #if 0
216 s->internal_buffer= av_fast_realloc(
217 s->internal_buffer,
218 &s->internal_buffer_size,
219 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
220 );
221 #endif
222
223 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
224 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
225 (*picture_number)++;
226
227 if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
228 for(i=0; i<4; i++){
229 av_freep(&buf->base[i]);
230 buf->data[i]= NULL;
231 }
232 }
233
234 if(buf->base[0]){
235 pic->age= *picture_number - buf->last_pic_num;
236 buf->last_pic_num= *picture_number;
237 }else{
238 int h_chroma_shift, v_chroma_shift;
239 int size[4] = {0};
240 int tmpsize;
241 int unaligned;
242 AVPicture picture;
243 int stride_align[4];
244
245 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
246
247 avcodec_align_dimensions(s, &w, &h);
248
249 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
250 w+= EDGE_WIDTH*2;
251 h+= EDGE_WIDTH*2;
252 }
253
254 do {
255 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
256 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
257 ff_fill_linesize(&picture, s->pix_fmt, w);
258 // increase alignment of w for next try (rhs gives the lowest bit set in w)
259 w += w & ~(w-1);
260
261 unaligned = 0;
262 for (i=0; i<4; i++){
263 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
264 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
265 //picture size unneccessarily in some cases. The solution here is not
266 //pretty and better ideas are welcome!
267 #if HAVE_MMX
268 if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
269 s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
270 s->codec_id == CODEC_ID_VP6A)
271 stride_align[i]= 16;
272 else
273 #endif
274 stride_align[i] = STRIDE_ALIGN;
275 unaligned |= picture.linesize[i] % stride_align[i];
276 }
277 } while (unaligned);
278
279 tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
280 if (tmpsize < 0)
281 return -1;
282
283 for (i=0; i<3 && picture.data[i+1]; i++)
284 size[i] = picture.data[i+1] - picture.data[i];
285 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
286
287 buf->last_pic_num= -256*256*256*64;
288 memset(buf->base, 0, sizeof(buf->base));
289 memset(buf->data, 0, sizeof(buf->data));
290
291 for(i=0; i<4 && size[i]; i++){
292 const int h_shift= i==0 ? 0 : h_chroma_shift;
293 const int v_shift= i==0 ? 0 : v_chroma_shift;
294
295 buf->linesize[i]= picture.linesize[i];
296
297 buf->base[i]= av_malloc(size[i]+16); //FIXME 16
298 if(buf->base[i]==NULL) return -1;
299 memset(buf->base[i], 128, size[i]);
300
301 // no edge if EDEG EMU or not planar YUV
302 if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
303 buf->data[i] = buf->base[i];
304 else
305 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
306 }
307 if(size[1] && !size[2])
308 ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
309 buf->width = s->width;
310 buf->height = s->height;
311 buf->pix_fmt= s->pix_fmt;
312 pic->age= 256*256*256*64;
313 }
314 pic->type= FF_BUFFER_TYPE_INTERNAL;
315
316 for(i=0; i<4; i++){
317 pic->base[i]= buf->base[i];
318 pic->data[i]= buf->data[i];
319 pic->linesize[i]= buf->linesize[i];
320 }
321 s->internal_buffer_count++;
322
323 pic->reordered_opaque= s->reordered_opaque;
324
325 if(s->debug&FF_DEBUG_BUFFERS)
326 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
327
328 return 0;
329 }
330
331 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
332 int i;
333 InternalBuffer *buf, *last;
334
335 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
336 assert(s->internal_buffer_count);
337
338 buf = NULL; /* avoids warning */
339 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
340 buf= &((InternalBuffer*)s->internal_buffer)[i];
341 if(buf->data[0] == pic->data[0])
342 break;
343 }
344 assert(i < s->internal_buffer_count);
345 s->internal_buffer_count--;
346 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
347
348 FFSWAP(InternalBuffer, *buf, *last);
349
350 for(i=0; i<4; i++){
351 pic->data[i]=NULL;
352 // pic->base[i]=NULL;
353 }
354 //printf("R%X\n", pic->opaque);
355
356 if(s->debug&FF_DEBUG_BUFFERS)
357 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
358 }
359
360 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
361 AVFrame temp_pic;
362 int i;
363
364 /* If no picture return a new buffer */
365 if(pic->data[0] == NULL) {
366 /* We will copy from buffer, so must be readable */
367 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
368 return s->get_buffer(s, pic);
369 }
370
371 /* If internal buffer type return the same buffer */
372 if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
373 pic->reordered_opaque= s->reordered_opaque;
374 return 0;
375 }
376
377 /*
378 * Not internal type and reget_buffer not overridden, emulate cr buffer
379 */
380 temp_pic = *pic;
381 for(i = 0; i < 4; i++)
382 pic->data[i] = pic->base[i] = NULL;
383 pic->opaque = NULL;
384 /* Allocate new frame */
385 if (s->get_buffer(s, pic))
386 return -1;
387 /* Copy image data from old buffer to new buffer */
388 av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
389 s->height);
390 s->release_buffer(s, &temp_pic); // Release old frame
391 return 0;
392 }
393
394 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
395 int i;
396
397 for(i=0; i<count; i++){
398 int r= func(c, (char*)arg + i*size);
399 if(ret) ret[i]= r;
400 }
401 return 0;
402 }
403
404 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
405 int i;
406
407 for(i=0; i<count; i++){
408 int r= func(c, arg, i, 0);
409 if(ret) ret[i]= r;
410 }
411 return 0;
412 }
413
414 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
415 while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
416 ++fmt;
417 return fmt[0];
418 }
419
420 void avcodec_get_frame_defaults(AVFrame *pic){
421 memset(pic, 0, sizeof(AVFrame));
422
423 pic->pts= AV_NOPTS_VALUE;
424 pic->key_frame= 1;
425 }
426
427 AVFrame *avcodec_alloc_frame(void){
428 AVFrame *pic= av_malloc(sizeof(AVFrame));
429
430 if(pic==NULL) return NULL;
431
432 avcodec_get_frame_defaults(pic);
433
434 return pic;
435 }
436
437 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
438 {
439 int ret= -1;
440
441 /* If there is a user-supplied mutex locking routine, call it. */
442 if (ff_lockmgr_cb) {
443 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
444 return -1;
445 }
446
447 entangled_thread_counter++;
448 if(entangled_thread_counter != 1){
449 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
450 goto end;
451 }
452
453 if(avctx->codec || !codec)
454 goto end;
455
456 if (codec->priv_data_size > 0) {
457 avctx->priv_data = av_mallocz(codec->priv_data_size);
458 if (!avctx->priv_data) {
459 ret = AVERROR(ENOMEM);
460 goto end;
461 }
462 } else {
463 avctx->priv_data = NULL;
464 }
465
466 if(avctx->coded_width && avctx->coded_height)
467 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
468 else if(avctx->width && avctx->height)
469 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
470
471 #define SANE_NB_CHANNELS 128U
472 if (((avctx->coded_width || avctx->coded_height)
473 && avcodec_check_dimensions(avctx, avctx->coded_width, avctx->coded_height))
474 || avctx->channels > SANE_NB_CHANNELS) {
475 ret = AVERROR(EINVAL);
476 goto free_and_end;
477 }
478
479 avctx->codec = codec;
480 if ((avctx->codec_type == CODEC_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
481 avctx->codec_id == CODEC_ID_NONE) {
482 avctx->codec_type = codec->type;
483 avctx->codec_id = codec->id;
484 }
485 if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
486 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
487 goto free_and_end;
488 }
489 avctx->frame_number = 0;
490 if(avctx->codec->init){
491 ret = avctx->codec->init(avctx);
492 if (ret < 0) {
493 goto free_and_end;
494 }
495 }
496 ret=0;
497 end:
498 entangled_thread_counter--;
499
500 /* Release any user-supplied mutex. */
501 if (ff_lockmgr_cb) {
502 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
503 }
504 return ret;
505 free_and_end:
506 av_freep(&avctx->priv_data);
507 avctx->codec= NULL;
508 goto end;
509 }
510
511 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
512 const short *samples)
513 {
514 if(buf_size < FF_MIN_BUFFER_SIZE && 0){
515 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
516 return -1;
517 }
518 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
519 int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
520 avctx->frame_number++;
521 return ret;
522 }else
523 return 0;
524 }
525
526 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
527 const AVFrame *pict)
528 {
529 if(buf_size < FF_MIN_BUFFER_SIZE){
530 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
531 return -1;
532 }
533 if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
534 return -1;
535 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
536 int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
537 avctx->frame_number++;
538 emms_c(); //needed to avoid an emms_c() call before every return;
539
540 return ret;
541 }else
542 return 0;
543 }
544
545 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
546 const AVSubtitle *sub)
547 {
548 int ret;
549 if(sub->start_display_time) {
550 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
551 return -1;
552 }
553 if(sub->num_rects == 0 || !sub->rects)
554 return -1;
555 ret = avctx->codec->encode(avctx, buf, buf_size, sub);
556 avctx->frame_number++;
557 return ret;
558 }
559
560 #if LIBAVCODEC_VERSION_MAJOR < 53
561 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
562 int *got_picture_ptr,
563 const uint8_t *buf, int buf_size)
564 {
565 AVPacket avpkt;
566 av_init_packet(&avpkt);
567 avpkt.data = buf;
568 avpkt.size = buf_size;
569 // HACK for CorePNG to decode as normal PNG by default
570 avpkt.flags = AV_PKT_FLAG_KEY;
571
572 return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
573 }
574 #endif
575
576 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
577 int *got_picture_ptr,
578 AVPacket *avpkt)
579 {
580 int ret;
581
582 *got_picture_ptr= 0;
583 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
584 return -1;
585 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
586 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
587 avpkt);
588
589 emms_c(); //needed to avoid an emms_c() call before every return;
590
591 if (*got_picture_ptr)
592 avctx->frame_number++;
593 }else
594 ret= 0;
595
596 return ret;
597 }
598
599 #if LIBAVCODEC_VERSION_MAJOR < 53
600 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
601 int *frame_size_ptr,
602 const uint8_t *buf, int buf_size)
603 {
604 AVPacket avpkt;
605 av_init_packet(&avpkt);
606 avpkt.data = buf;
607 avpkt.size = buf_size;
608
609 return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
610 }
611 #endif
612
613 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
614 int *frame_size_ptr,
615 AVPacket *avpkt)
616 {
617 int ret;
618
619 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
620 //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
621 if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
622 av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
623 return -1;
624 }
625 if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
626 *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
627 av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
628 return -1;
629 }
630
631 ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
632 avctx->frame_number++;
633 }else{
634 ret= 0;
635 *frame_size_ptr=0;
636 }
637 return ret;
638 }
639
640 #if LIBAVCODEC_VERSION_MAJOR < 53
641 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
642 int *got_sub_ptr,
643 const uint8_t *buf, int buf_size)
644 {
645 AVPacket avpkt;
646 av_init_packet(&avpkt);
647 avpkt.data = buf;
648 avpkt.size = buf_size;
649
650 return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
651 }
652 #endif
653
654 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
655 int *got_sub_ptr,
656 AVPacket *avpkt)
657 {
658 int ret;
659
660 *got_sub_ptr = 0;
661 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
662 if (*got_sub_ptr)
663 avctx->frame_number++;
664 return ret;
665 }
666
667 av_cold int avcodec_close(AVCodecContext *avctx)
668 {
669 /* If there is a user-supplied mutex locking routine, call it. */
670 if (ff_lockmgr_cb) {
671 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
672 return -1;
673 }
674
675 entangled_thread_counter++;
676 if(entangled_thread_counter != 1){
677 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
678 entangled_thread_counter--;
679 return -1;
680 }
681
682 if (HAVE_THREADS && avctx->thread_opaque)
683 avcodec_thread_free(avctx);
684 if (avctx->codec && avctx->codec->close)
685 avctx->codec->close(avctx);
686 avcodec_default_free_buffers(avctx);
687 av_freep(&avctx->priv_data);
688 avctx->codec = NULL;
689 entangled_thread_counter--;
690
691 /* Release any user-supplied mutex. */
692 if (ff_lockmgr_cb) {
693 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
694 }
695 return 0;
696 }
697
698 AVCodec *avcodec_find_encoder(enum CodecID id)
699 {
700 AVCodec *p;
701 p = first_avcodec;
702 while (p) {
703 if (p->encode != NULL && p->id == id)
704 return p;
705 p = p->next;
706 }
707 return NULL;
708 }
709
710 AVCodec *avcodec_find_encoder_by_name(const char *name)
711 {
712 AVCodec *p;
713 if (!name)
714 return NULL;
715 p = first_avcodec;
716 while (p) {
717 if (p->encode != NULL && strcmp(name,p->name) == 0)
718 return p;
719 p = p->next;
720 }
721 return NULL;
722 }
723
724 AVCodec *avcodec_find_decoder(enum CodecID id)
725 {
726 AVCodec *p;
727 p = first_avcodec;
728 while (p) {
729 if (p->decode != NULL && p->id == id)
730 return p;
731 p = p->next;
732 }
733 return NULL;
734 }
735
736 AVCodec *avcodec_find_decoder_by_name(const char *name)
737 {
738 AVCodec *p;
739 if (!name)
740 return NULL;
741 p = first_avcodec;
742 while (p) {
743 if (p->decode != NULL && strcmp(name,p->name) == 0)
744 return p;
745 p = p->next;
746 }
747 return NULL;
748 }
749
750 int av_get_bit_rate(AVCodecContext *ctx)
751 {
752 int bit_rate;
753 int bits_per_sample;
754
755 switch(ctx->codec_type) {
756 case CODEC_TYPE_VIDEO:
757 bit_rate = ctx->bit_rate;
758 break;
759 case CODEC_TYPE_AUDIO:
760 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
761 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
762 break;
763 case CODEC_TYPE_DATA:
764 bit_rate = ctx->bit_rate;
765 break;
766 case CODEC_TYPE_SUBTITLE:
767 bit_rate = ctx->bit_rate;
768 break;
769 case CODEC_TYPE_ATTACHMENT:
770 bit_rate = ctx->bit_rate;
771 break;
772 default:
773 bit_rate = 0;
774 break;
775 }
776 return bit_rate;
777 }
778
779 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
780 {
781 const char *codec_name;
782 AVCodec *p;
783 char buf1[32];
784 int bitrate;
785 AVRational display_aspect_ratio;
786
787 if (encode)
788 p = avcodec_find_encoder(enc->codec_id);
789 else
790 p = avcodec_find_decoder(enc->codec_id);
791
792 if (p) {
793 codec_name = p->name;
794 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
795 /* fake mpeg2 transport stream codec (currently not
796 registered) */
797 codec_name = "mpeg2ts";
798 } else if (enc->codec_name[0] != '\0') {
799 codec_name = enc->codec_name;
800 } else {
801 /* output avi tags */
802 if( isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
803 && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
804 snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
805 enc->codec_tag & 0xff,
806 (enc->codec_tag >> 8) & 0xff,
807 (enc->codec_tag >> 16) & 0xff,
808 (enc->codec_tag >> 24) & 0xff,
809 enc->codec_tag);
810 } else {
811 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
812 }
813 codec_name = buf1;
814 }
815
816 switch(enc->codec_type) {
817 case CODEC_TYPE_VIDEO:
818 snprintf(buf, buf_size,
819 "Video: %s%s",
820 codec_name, enc->mb_decision ? " (hq)" : "");
821 if (enc->pix_fmt != PIX_FMT_NONE) {
822 snprintf(buf + strlen(buf), buf_size - strlen(buf),
823 ", %s",
824 avcodec_get_pix_fmt_name(enc->pix_fmt));
825 }
826 if (enc->width) {
827 snprintf(buf + strlen(buf), buf_size - strlen(buf),
828 ", %dx%d",
829 enc->width, enc->height);
830 if (enc->sample_aspect_ratio.num) {
831 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
832 enc->width*enc->sample_aspect_ratio.num,
833 enc->height*enc->sample_aspect_ratio.den,
834 1024*1024);
835 snprintf(buf + strlen(buf), buf_size - strlen(buf),
836 " [PAR %d:%d DAR %d:%d]",
837 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
838 display_aspect_ratio.num, display_aspect_ratio.den);
839 }
840 if(av_log_get_level() >= AV_LOG_DEBUG){
841 int g= av_gcd(enc->time_base.num, enc->time_base.den);
842 snprintf(buf + strlen(buf), buf_size - strlen(buf),
843 ", %d/%d",
844 enc->time_base.num/g, enc->time_base.den/g);
845 }
846 }
847 if (encode) {
848 snprintf(buf + strlen(buf), buf_size - strlen(buf),
849 ", q=%d-%d", enc->qmin, enc->qmax);
850 }
851 break;
852 case CODEC_TYPE_AUDIO:
853 snprintf(buf, buf_size,
854 "Audio: %s",
855 codec_name);
856 if (enc->sample_rate) {
857 snprintf(buf + strlen(buf), buf_size - strlen(buf),
858 ", %d Hz", enc->sample_rate);
859 }
860 av_strlcat(buf, ", ", buf_size);
861 avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
862 if (enc->sample_fmt != SAMPLE_FMT_NONE) {
863 snprintf(buf + strlen(buf), buf_size - strlen(buf),
864 ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
865 }
866 break;
867 case CODEC_TYPE_DATA:
868 snprintf(buf, buf_size, "Data: %s", codec_name);
869 break;
870 case CODEC_TYPE_SUBTITLE:
871 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
872 break;
873 case CODEC_TYPE_ATTACHMENT:
874 snprintf(buf, buf_size, "Attachment: %s", codec_name);
875 break;
876 default:
877 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
878 return;
879 }
880 if (encode) {
881 if (enc->flags & CODEC_FLAG_PASS1)
882 snprintf(buf + strlen(buf), buf_size - strlen(buf),
883 ", pass 1");
884 if (enc->flags & CODEC_FLAG_PASS2)
885 snprintf(buf + strlen(buf), buf_size - strlen(buf),
886 ", pass 2");
887 }
888 bitrate = av_get_bit_rate(enc);
889 if (bitrate != 0) {
890 snprintf(buf + strlen(buf), buf_size - strlen(buf),
891 ", %d kb/s", bitrate / 1000);
892 }
893 }
894
895 unsigned avcodec_version( void )
896 {
897 return LIBAVCODEC_VERSION_INT;
898 }
899
900 const char *avcodec_configuration(void)
901 {
902 return FFMPEG_CONFIGURATION;
903 }
904
905 const char *avcodec_license(void)
906 {
907 #define LICENSE_PREFIX "libavcodec license: "
908 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
909 }
910
911 void avcodec_init(void)
912 {
913 static int initialized = 0;
914
915 if (initialized != 0)
916 return;
917 initialized = 1;
918
919 dsputil_static_init();
920 }
921
922 void avcodec_flush_buffers(AVCodecContext *avctx)
923 {
924 if(avctx->codec->flush)
925 avctx->codec->flush(avctx);
926 }
927
928 void avcodec_default_free_buffers(AVCodecContext *s){
929 int i, j;
930
931 if(s->internal_buffer==NULL) return;
932
933 if (s->internal_buffer_count)
934 av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
935 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
936 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
937 for(j=0; j<4; j++){
938 av_freep(&buf->base[j]);
939 buf->data[j]= NULL;
940 }
941 }
942 av_freep(&s->internal_buffer);
943
944 s->internal_buffer_count=0;
945 }
946
947 char av_get_pict_type_char(int pict_type){
948 switch(pict_type){
949 case FF_I_TYPE: return 'I';
950 case FF_P_TYPE: return 'P';
951 case FF_B_TYPE: return 'B';
952 case FF_S_TYPE: return 'S';
953 case FF_SI_TYPE:return 'i';
954 case FF_SP_TYPE:return 'p';
955 case FF_BI_TYPE:return 'b';
956 default: return '?';
957 }
958 }
959
960 int av_get_bits_per_sample(enum CodecID codec_id){
961 switch(codec_id){
962 case CODEC_ID_ADPCM_SBPRO_2:
963 return 2;
964 case CODEC_ID_ADPCM_SBPRO_3:
965 return 3;
966 case CODEC_ID_ADPCM_SBPRO_4:
967 case CODEC_ID_ADPCM_CT:
968 case CODEC_ID_ADPCM_IMA_WAV:
969 case CODEC_ID_ADPCM_MS:
970 case CODEC_ID_ADPCM_YAMAHA:
971 return 4;
972 case CODEC_ID_PCM_ALAW:
973 case CODEC_ID_PCM_MULAW:
974 case CODEC_ID_PCM_S8:
975 case CODEC_ID_PCM_U8:
976 case CODEC_ID_PCM_ZORK:
977 return 8;
978 case CODEC_ID_PCM_S16BE:
979 case CODEC_ID_PCM_S16LE:
980 case CODEC_ID_PCM_S16LE_PLANAR:
981 case CODEC_ID_PCM_U16BE:
982 case CODEC_ID_PCM_U16LE:
983 return 16;
984 case CODEC_ID_PCM_S24DAUD:
985 case CODEC_ID_PCM_S24BE:
986 case CODEC_ID_PCM_S24LE:
987 case CODEC_ID_PCM_U24BE:
988 case CODEC_ID_PCM_U24LE:
989 return 24;
990 case CODEC_ID_PCM_S32BE:
991 case CODEC_ID_PCM_S32LE:
992 case CODEC_ID_PCM_U32BE:
993 case CODEC_ID_PCM_U32LE:
994 case CODEC_ID_PCM_F32BE:
995 case CODEC_ID_PCM_F32LE:
996 return 32;
997 case CODEC_ID_PCM_F64BE:
998 case CODEC_ID_PCM_F64LE:
999 return 64;
1000 default:
1001 return 0;
1002 }
1003 }
1004
1005 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
1006 switch (sample_fmt) {
1007 case SAMPLE_FMT_U8:
1008 return 8;
1009 case SAMPLE_FMT_S16:
1010 return 16;
1011 case SAMPLE_FMT_S32:
1012 case SAMPLE_FMT_FLT:
1013 return 32;
1014 case SAMPLE_FMT_DBL:
1015 return 64;
1016 default:
1017 return 0;
1018 }
1019 }
1020
1021 #if !HAVE_THREADS
1022 int avcodec_thread_init(AVCodecContext *s, int thread_count){
1023 s->thread_count = thread_count;
1024 return -1;
1025 }
1026 #endif
1027
1028 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1029 {
1030 unsigned int n = 0;
1031
1032 while(v >= 0xff) {
1033 *s++ = 0xff;
1034 v -= 0xff;
1035 n++;
1036 }
1037 *s = v;
1038 n++;
1039 return n;
1040 }
1041
1042 /* Wrapper to work around the lack of mkstemp() on mingw/cygin.
1043 * Also, tries to create file in /tmp first, if possible.
1044 * *prefix can be a character constant; *filename will be allocated internally.
1045 * Returns file descriptor of opened file (or -1 on error)
1046 * and opened file name in **filename. */
1047 int av_tempfile(char *prefix, char **filename) {
1048 int fd=-1;
1049 #if !HAVE_MKSTEMP
1050 *filename = tempnam(".", prefix);
1051 #else
1052 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
1053 *filename = av_malloc(len);
1054 #endif
1055 /* -----common section-----*/
1056 if (*filename == NULL) {
1057 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
1058 return -1;
1059 }
1060 #if !HAVE_MKSTEMP
1061 fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
1062 #else
1063 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
1064 fd = mkstemp(*filename);
1065 if (fd < 0) {
1066 snprintf(*filename, len, "./%sXXXXXX", prefix);
1067 fd = mkstemp(*filename);
1068 }
1069 #endif
1070 /* -----common section-----*/
1071 if (fd < 0) {
1072 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
1073 return -1;
1074 }
1075 return fd; /* success */
1076 }
1077
1078 typedef struct {
1079 const char *abbr;
1080 int width, height;
1081 } VideoFrameSizeAbbr;
1082
1083 typedef struct {
1084 const char *abbr;
1085 int rate_num, rate_den;
1086 } VideoFrameRateAbbr;
1087
1088 static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
1089 { "ntsc", 720, 480 },
1090 { "pal", 720, 576 },
1091 { "qntsc", 352, 240 }, /* VCD compliant NTSC */
1092 { "qpal", 352, 288 }, /* VCD compliant PAL */
1093 { "sntsc", 640, 480 }, /* square pixel NTSC */
1094 { "spal", 768, 576 }, /* square pixel PAL */
1095 { "film", 352, 240 },
1096 { "ntsc-film", 352, 240 },
1097 { "sqcif", 128, 96 },
1098 { "qcif", 176, 144 },
1099 { "cif", 352, 288 },
1100 { "4cif", 704, 576 },
1101 { "16cif", 1408,1152 },
1102 { "qqvga", 160, 120 },
1103 { "qvga", 320, 240 },
1104 { "vga", 640, 480 },
1105 { "svga", 800, 600 },
1106 { "xga", 1024, 768 },
1107 { "uxga", 1600,1200 },
1108 { "qxga", 2048,1536 },
1109 { "sxga", 1280,1024 },
1110 { "qsxga", 2560,2048 },
1111 { "hsxga", 5120,4096 },
1112 { "wvga", 852, 480 },
1113 { "wxga", 1366, 768 },
1114 { "wsxga", 1600,1024 },
1115 { "wuxga", 1920,1200 },
1116 { "woxga", 2560,1600 },
1117 { "wqsxga", 3200,2048 },
1118 { "wquxga", 3840,2400 },
1119 { "whsxga", 6400,4096 },
1120 { "whuxga", 7680,4800 },
1121 { "cga", 320, 200 },
1122 { "ega", 640, 350 },
1123 { "hd480", 852, 480 },
1124 { "hd720", 1280, 720 },
1125 { "hd1080", 1920,1080 },
1126 };
1127
1128 static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1129 { "ntsc", 30000, 1001 },
1130 { "pal", 25, 1 },
1131 { "qntsc", 30000, 1001 }, /* VCD compliant NTSC */
1132 { "qpal", 25, 1 }, /* VCD compliant PAL */
1133 { "sntsc", 30000, 1001 }, /* square pixel NTSC */
1134 { "spal", 25, 1 }, /* square pixel PAL */
1135 { "film", 24, 1 },
1136 { "ntsc-film", 24000, 1001 },
1137 };
1138
1139 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1140 {
1141 int i;
1142 int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1143 char *p;
1144 int frame_width = 0, frame_height = 0;
1145
1146 for(i=0;i<n;i++) {
1147 if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1148 frame_width = video_frame_size_abbrs[i].width;
1149 frame_height = video_frame_size_abbrs[i].height;
1150 break;
1151 }
1152 }
1153 if (i == n) {
1154 p = str;
1155 frame_width = strtol(p, &p, 10);
1156 if (*p)
1157 p++;
1158 frame_height = strtol(p, &p, 10);
1159 }
1160 if (frame_width <= 0 || frame_height <= 0)
1161 return -1;
1162 *width_ptr = frame_width;
1163 *height_ptr = frame_height;
1164 return 0;
1165 }
1166
1167 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1168 {
1169 int i;
1170 int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1171 char* cp;
1172
1173 /* First, we check our abbreviation table */
1174 for (i = 0; i < n; ++i)
1175 if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1176 frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1177 frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1178 return 0;
1179 }
1180
1181 /* Then, we try to parse it as fraction */
1182 cp = strchr(arg, '/');
1183 if (!cp)
1184 cp = strchr(arg, ':');
1185 if (cp) {
1186 char* cpp;
1187 frame_rate->num = strtol(arg, &cpp, 10);
1188 if (cpp != arg || cpp == cp)
1189 frame_rate->den = strtol(cp+1, &cpp, 10);
1190 else
1191 frame_rate->num = 0;
1192 }
1193 else {
1194 /* Finally we give up and parse it as double */
1195 AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1196 frame_rate->den = time_base.den;
1197 frame_rate->num = time_base.num;
1198 }
1199 if (!frame_rate->num || !frame_rate->den)
1200 return -1;
1201 else
1202 return 0;
1203 }
1204
1205 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1206 int i;
1207 for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1208 return i;
1209 }
1210
1211 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1212 {
1213 av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1214 "version to the newest one from SVN. If the problem still "
1215 "occurs, it means that your file has a feature which has not "
1216 "been implemented.", feature);
1217 if(want_sample)
1218 av_log_ask_for_sample(avc, NULL);
1219 else
1220 av_log(avc, AV_LOG_WARNING, "\n");
1221 }
1222
1223 void av_log_ask_for_sample(void *avc, const char *msg)
1224 {
1225 if (msg)
1226 av_log(avc, AV_LOG_WARNING, "%s ", msg);
1227 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1228 "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1229 "and contact the ffmpeg-devel mailing list.\n");
1230 }
1231
1232 static AVHWAccel *first_hwaccel = NULL;
1233
1234 void av_register_hwaccel(AVHWAccel *hwaccel)
1235 {
1236 AVHWAccel **p = &first_hwaccel;
1237 while (*p)
1238 p = &(*p)->next;
1239 *p = hwaccel;
1240 hwaccel->next = NULL;
1241 }
1242
1243 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1244 {
1245 return hwaccel ? hwaccel->next : first_hwaccel;
1246 }
1247
1248 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1249 {
1250 AVHWAccel *hwaccel=NULL;
1251
1252 while((hwaccel= av_hwaccel_next(hwaccel))){
1253 if ( hwaccel->id == codec_id
1254 && hwaccel->pix_fmt == pix_fmt)
1255 return hwaccel;
1256 }
1257 return NULL;
1258 }
1259
1260 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1261 {
1262 if (ff_lockmgr_cb) {
1263 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1264 return -1;
1265 }
1266
1267 ff_lockmgr_cb = cb;
1268
1269 if (ff_lockmgr_cb) {
1270 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1271 return -1;
1272 }
1273 return 0;
1274 }