02b9fd69048c564316b7921b04bfdf10a3817ae7
[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
25 * utils.
26 */
27
28 #include "libavutil/avstring.h"
29 #include "libavutil/integer.h"
30 #include "libavutil/crc.h"
31 #include "libavutil/pixdesc.h"
32 #include "libavcore/audioconvert.h"
33 #include "libavcore/imgutils.h"
34 #include "libavcore/internal.h"
35 #include "libavcore/samplefmt.h"
36 #include "avcodec.h"
37 #include "dsputil.h"
38 #include "libavutil/opt.h"
39 #include "imgconvert.h"
40 #include "audioconvert.h"
41 #include "internal.h"
42 #include <stdlib.h>
43 #include <stdarg.h>
44 #include <limits.h>
45 #include <float.h>
46
47 static int volatile entangled_thread_counter=0;
48 int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
49 static void *codec_mutex;
50
51 void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size)
52 {
53 if(min_size < *size)
54 return ptr;
55
56 min_size= FFMAX(17*min_size/16 + 32, min_size);
57
58 ptr= av_realloc(ptr, min_size);
59 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
60 min_size= 0;
61
62 *size= min_size;
63
64 return ptr;
65 }
66
67 void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size)
68 {
69 void **p = ptr;
70 if (min_size < *size)
71 return;
72 min_size= FFMAX(17*min_size/16 + 32, min_size);
73 av_free(*p);
74 *p = av_malloc(min_size);
75 if (!*p) min_size = 0;
76 *size= min_size;
77 }
78
79 /* encoder management */
80 static AVCodec *first_avcodec = NULL;
81
82 AVCodec *av_codec_next(AVCodec *c){
83 if(c) return c->next;
84 else return first_avcodec;
85 }
86
87 void avcodec_register(AVCodec *codec)
88 {
89 AVCodec **p;
90 avcodec_init();
91 p = &first_avcodec;
92 while (*p != NULL) p = &(*p)->next;
93 *p = codec;
94 codec->next = NULL;
95 }
96
97 #if LIBAVCODEC_VERSION_MAJOR < 53
98 void register_avcodec(AVCodec *codec)
99 {
100 avcodec_register(codec);
101 }
102 #endif
103
104 unsigned avcodec_get_edge_width(void)
105 {
106 return EDGE_WIDTH;
107 }
108
109 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
110 s->coded_width = width;
111 s->coded_height= height;
112 s->width = -((-width )>>s->lowres);
113 s->height= -((-height)>>s->lowres);
114 }
115
116 typedef struct InternalBuffer{
117 int last_pic_num;
118 uint8_t *base[4];
119 uint8_t *data[4];
120 int linesize[4];
121 int width, height;
122 enum PixelFormat pix_fmt;
123 }InternalBuffer;
124
125 #define INTERNAL_BUFFER_SIZE 32
126
127 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
128 int w_align= 1;
129 int h_align= 1;
130
131 switch(s->pix_fmt){
132 case PIX_FMT_YUV420P:
133 case PIX_FMT_YUYV422:
134 case PIX_FMT_UYVY422:
135 case PIX_FMT_YUV422P:
136 case PIX_FMT_YUV440P:
137 case PIX_FMT_YUV444P:
138 case PIX_FMT_GRAY8:
139 case PIX_FMT_GRAY16BE:
140 case PIX_FMT_GRAY16LE:
141 case PIX_FMT_YUVJ420P:
142 case PIX_FMT_YUVJ422P:
143 case PIX_FMT_YUVJ440P:
144 case PIX_FMT_YUVJ444P:
145 case PIX_FMT_YUVA420P:
146 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
147 h_align= 16;
148 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 || s->codec_id == CODEC_ID_H264)
149 h_align= 32; // interlaced is rounded up to 2 MBs
150 break;
151 case PIX_FMT_YUV411P:
152 case PIX_FMT_UYYVYY411:
153 w_align=32;
154 h_align=8;
155 break;
156 case PIX_FMT_YUV410P:
157 if(s->codec_id == CODEC_ID_SVQ1){
158 w_align=64;
159 h_align=64;
160 }
161 case PIX_FMT_RGB555:
162 if(s->codec_id == CODEC_ID_RPZA){
163 w_align=4;
164 h_align=4;
165 }
166 case PIX_FMT_PAL8:
167 case PIX_FMT_BGR8:
168 case PIX_FMT_RGB8:
169 if(s->codec_id == CODEC_ID_SMC){
170 w_align=4;
171 h_align=4;
172 }
173 break;
174 case PIX_FMT_BGR24:
175 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
176 w_align=4;
177 h_align=4;
178 }
179 break;
180 default:
181 w_align= 1;
182 h_align= 1;
183 break;
184 }
185
186 *width = FFALIGN(*width , w_align);
187 *height= FFALIGN(*height, h_align);
188 if(s->codec_id == CODEC_ID_H264 || s->lowres)
189 *height+=2; // some of the optimized chroma MC reads one line too much
190 // which is also done in mpeg decoders with lowres > 0
191
192 linesize_align[0] =
193 linesize_align[1] =
194 linesize_align[2] =
195 linesize_align[3] = STRIDE_ALIGN;
196 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
197 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
198 //picture size unneccessarily in some cases. The solution here is not
199 //pretty and better ideas are welcome!
200 #if HAVE_MMX
201 if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
202 s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
203 s->codec_id == CODEC_ID_VP6A) {
204 linesize_align[0] =
205 linesize_align[1] =
206 linesize_align[2] = 16;
207 }
208 #endif
209 }
210
211 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
212 int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
213 int linesize_align[4];
214 int align;
215 avcodec_align_dimensions2(s, width, height, linesize_align);
216 align = FFMAX(linesize_align[0], linesize_align[3]);
217 linesize_align[1] <<= chroma_shift;
218 linesize_align[2] <<= chroma_shift;
219 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
220 *width=FFALIGN(*width, align);
221 }
222
223 #if LIBAVCODEC_VERSION_MAJOR < 53
224 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
225 return av_image_check_size(w, h, 0, av_log_ctx);
226 }
227 #endif
228
229 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
230 int i;
231 int w= s->width;
232 int h= s->height;
233 InternalBuffer *buf;
234 int *picture_number;
235
236 if(pic->data[0]!=NULL) {
237 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
238 return -1;
239 }
240 if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
241 av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
242 return -1;
243 }
244
245 if(av_image_check_size(w, h, 0, s))
246 return -1;
247
248 if(s->internal_buffer==NULL){
249 s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
250 }
251 #if 0
252 s->internal_buffer= av_fast_realloc(
253 s->internal_buffer,
254 &s->internal_buffer_size,
255 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
256 );
257 #endif
258
259 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
260 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
261 (*picture_number)++;
262
263 if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
264 for(i=0; i<4; i++){
265 av_freep(&buf->base[i]);
266 buf->data[i]= NULL;
267 }
268 }
269
270 if(buf->base[0]){
271 pic->age= *picture_number - buf->last_pic_num;
272 buf->last_pic_num= *picture_number;
273 }else{
274 int h_chroma_shift, v_chroma_shift;
275 int size[4] = {0};
276 int tmpsize;
277 int unaligned;
278 AVPicture picture;
279 int stride_align[4];
280
281 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
282
283 avcodec_align_dimensions2(s, &w, &h, stride_align);
284
285 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
286 w+= EDGE_WIDTH*2;
287 h+= EDGE_WIDTH*2;
288 }
289
290 do {
291 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
292 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
293 av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
294 // increase alignment of w for next try (rhs gives the lowest bit set in w)
295 w += w & ~(w-1);
296
297 unaligned = 0;
298 for (i=0; i<4; i++){
299 unaligned |= picture.linesize[i] % stride_align[i];
300 }
301 } while (unaligned);
302
303 tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
304 if (tmpsize < 0)
305 return -1;
306
307 for (i=0; i<3 && picture.data[i+1]; i++)
308 size[i] = picture.data[i+1] - picture.data[i];
309 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
310
311 buf->last_pic_num= -256*256*256*64;
312 memset(buf->base, 0, sizeof(buf->base));
313 memset(buf->data, 0, sizeof(buf->data));
314
315 for(i=0; i<4 && size[i]; i++){
316 const int h_shift= i==0 ? 0 : h_chroma_shift;
317 const int v_shift= i==0 ? 0 : v_chroma_shift;
318
319 buf->linesize[i]= picture.linesize[i];
320
321 buf->base[i]= av_malloc(size[i]+16); //FIXME 16
322 if(buf->base[i]==NULL) return -1;
323 memset(buf->base[i], 128, size[i]);
324
325 // no edge if EDGE EMU or not planar YUV
326 if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
327 buf->data[i] = buf->base[i];
328 else
329 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
330 }
331 if(size[1] && !size[2])
332 ff_set_systematic_pal2((uint32_t*)buf->data[1], s->pix_fmt);
333 buf->width = s->width;
334 buf->height = s->height;
335 buf->pix_fmt= s->pix_fmt;
336 pic->age= 256*256*256*64;
337 }
338 pic->type= FF_BUFFER_TYPE_INTERNAL;
339
340 for(i=0; i<4; i++){
341 pic->base[i]= buf->base[i];
342 pic->data[i]= buf->data[i];
343 pic->linesize[i]= buf->linesize[i];
344 }
345 s->internal_buffer_count++;
346
347 if(s->pkt) pic->pkt_pts= s->pkt->pts;
348 else pic->pkt_pts= AV_NOPTS_VALUE;
349 pic->reordered_opaque= s->reordered_opaque;
350
351 if(s->debug&FF_DEBUG_BUFFERS)
352 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
353
354 return 0;
355 }
356
357 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
358 int i;
359 InternalBuffer *buf, *last;
360
361 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
362 assert(s->internal_buffer_count);
363
364 buf = NULL; /* avoids warning */
365 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
366 buf= &((InternalBuffer*)s->internal_buffer)[i];
367 if(buf->data[0] == pic->data[0])
368 break;
369 }
370 assert(i < s->internal_buffer_count);
371 s->internal_buffer_count--;
372 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
373
374 FFSWAP(InternalBuffer, *buf, *last);
375
376 for(i=0; i<4; i++){
377 pic->data[i]=NULL;
378 // pic->base[i]=NULL;
379 }
380 //printf("R%X\n", pic->opaque);
381
382 if(s->debug&FF_DEBUG_BUFFERS)
383 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
384 }
385
386 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
387 AVFrame temp_pic;
388 int i;
389
390 /* If no picture return a new buffer */
391 if(pic->data[0] == NULL) {
392 /* We will copy from buffer, so must be readable */
393 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
394 return s->get_buffer(s, pic);
395 }
396
397 /* If internal buffer type return the same buffer */
398 if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
399 pic->reordered_opaque= s->reordered_opaque;
400 return 0;
401 }
402
403 /*
404 * Not internal type and reget_buffer not overridden, emulate cr buffer
405 */
406 temp_pic = *pic;
407 for(i = 0; i < 4; i++)
408 pic->data[i] = pic->base[i] = NULL;
409 pic->opaque = NULL;
410 /* Allocate new frame */
411 if (s->get_buffer(s, pic))
412 return -1;
413 /* Copy image data from old buffer to new buffer */
414 av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
415 s->height);
416 s->release_buffer(s, &temp_pic); // Release old frame
417 return 0;
418 }
419
420 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
421 int i;
422
423 for(i=0; i<count; i++){
424 int r= func(c, (char*)arg + i*size);
425 if(ret) ret[i]= r;
426 }
427 return 0;
428 }
429
430 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
431 int i;
432
433 for(i=0; i<count; i++){
434 int r= func(c, arg, i, 0);
435 if(ret) ret[i]= r;
436 }
437 return 0;
438 }
439
440 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
441 while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
442 ++fmt;
443 return fmt[0];
444 }
445
446 void avcodec_get_frame_defaults(AVFrame *pic){
447 memset(pic, 0, sizeof(AVFrame));
448
449 pic->pts= AV_NOPTS_VALUE;
450 pic->key_frame= 1;
451 }
452
453 AVFrame *avcodec_alloc_frame(void){
454 AVFrame *pic= av_malloc(sizeof(AVFrame));
455
456 if(pic==NULL) return NULL;
457
458 avcodec_get_frame_defaults(pic);
459
460 return pic;
461 }
462
463 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
464 {
465 int ret= -1;
466
467 /* If there is a user-supplied mutex locking routine, call it. */
468 if (ff_lockmgr_cb) {
469 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
470 return -1;
471 }
472
473 entangled_thread_counter++;
474 if(entangled_thread_counter != 1){
475 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
476 goto end;
477 }
478
479 if(avctx->codec || !codec)
480 goto end;
481
482 if (codec->priv_data_size > 0) {
483 if(!avctx->priv_data){
484 avctx->priv_data = av_mallocz(codec->priv_data_size);
485 if (!avctx->priv_data) {
486 ret = AVERROR(ENOMEM);
487 goto end;
488 }
489 if(codec->priv_class){ //this can be droped once all user apps use avcodec_get_context_defaults3()
490 *(AVClass**)avctx->priv_data= codec->priv_class;
491 av_opt_set_defaults(avctx->priv_data);
492 }
493 }
494 } else {
495 avctx->priv_data = NULL;
496 }
497
498 if(avctx->coded_width && avctx->coded_height)
499 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
500 else if(avctx->width && avctx->height)
501 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
502
503 if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
504 && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
505 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
506 av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
507 avcodec_set_dimensions(avctx, 0, 0);
508 }
509
510 /* if the decoder init function was already called previously,
511 free the already allocated subtitle_header before overwriting it */
512 if (codec->decode)
513 av_freep(&avctx->subtitle_header);
514
515 #define SANE_NB_CHANNELS 128U
516 if (avctx->channels > SANE_NB_CHANNELS) {
517 ret = AVERROR(EINVAL);
518 goto free_and_end;
519 }
520
521 avctx->codec = codec;
522 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
523 avctx->codec_id == CODEC_ID_NONE) {
524 avctx->codec_type = codec->type;
525 avctx->codec_id = codec->id;
526 }
527 if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
528 && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
529 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
530 goto free_and_end;
531 }
532 avctx->frame_number = 0;
533 if (avctx->codec->max_lowres < avctx->lowres) {
534 av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
535 avctx->codec->max_lowres);
536 goto free_and_end;
537 }
538
539 if(avctx->codec->init){
540 ret = avctx->codec->init(avctx);
541 if (ret < 0) {
542 goto free_and_end;
543 }
544 }
545 ret=0;
546 end:
547 entangled_thread_counter--;
548
549 /* Release any user-supplied mutex. */
550 if (ff_lockmgr_cb) {
551 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
552 }
553 return ret;
554 free_and_end:
555 av_freep(&avctx->priv_data);
556 avctx->codec= NULL;
557 goto end;
558 }
559
560 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
561 const short *samples)
562 {
563 if(buf_size < FF_MIN_BUFFER_SIZE && 0){
564 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
565 return -1;
566 }
567 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
568 int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
569 avctx->frame_number++;
570 return ret;
571 }else
572 return 0;
573 }
574
575 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
576 const AVFrame *pict)
577 {
578 if(buf_size < FF_MIN_BUFFER_SIZE){
579 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
580 return -1;
581 }
582 if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
583 return -1;
584 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
585 int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
586 avctx->frame_number++;
587 emms_c(); //needed to avoid an emms_c() call before every return;
588
589 return ret;
590 }else
591 return 0;
592 }
593
594 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
595 const AVSubtitle *sub)
596 {
597 int ret;
598 if(sub->start_display_time) {
599 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
600 return -1;
601 }
602 if(sub->num_rects == 0 || !sub->rects)
603 return -1;
604 ret = avctx->codec->encode(avctx, buf, buf_size, sub);
605 avctx->frame_number++;
606 return ret;
607 }
608
609 #if FF_API_VIDEO_OLD
610 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
611 int *got_picture_ptr,
612 const uint8_t *buf, int buf_size)
613 {
614 AVPacket avpkt;
615 av_init_packet(&avpkt);
616 avpkt.data = buf;
617 avpkt.size = buf_size;
618 // HACK for CorePNG to decode as normal PNG by default
619 avpkt.flags = AV_PKT_FLAG_KEY;
620
621 return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
622 }
623 #endif
624
625 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
626 int *got_picture_ptr,
627 AVPacket *avpkt)
628 {
629 int ret;
630
631 *got_picture_ptr= 0;
632 if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
633 return -1;
634
635 avctx->pkt = avpkt;
636
637 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
638 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
639 avpkt);
640
641 emms_c(); //needed to avoid an emms_c() call before every return;
642
643 picture->pkt_dts= avpkt->dts;
644
645 if (*got_picture_ptr)
646 avctx->frame_number++;
647 }else
648 ret= 0;
649
650 return ret;
651 }
652
653 #if FF_API_AUDIO_OLD
654 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
655 int *frame_size_ptr,
656 const uint8_t *buf, int buf_size)
657 {
658 AVPacket avpkt;
659 av_init_packet(&avpkt);
660 avpkt.data = buf;
661 avpkt.size = buf_size;
662
663 return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
664 }
665 #endif
666
667 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
668 int *frame_size_ptr,
669 AVPacket *avpkt)
670 {
671 int ret;
672
673 avctx->pkt = avpkt;
674
675 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
676 //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
677 if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
678 av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
679 return -1;
680 }
681 if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
682 *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
683 av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
684 return -1;
685 }
686
687 ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
688 avctx->frame_number++;
689 }else{
690 ret= 0;
691 *frame_size_ptr=0;
692 }
693 return ret;
694 }
695
696 #if FF_API_SUBTITLE_OLD
697 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
698 int *got_sub_ptr,
699 const uint8_t *buf, int buf_size)
700 {
701 AVPacket avpkt;
702 av_init_packet(&avpkt);
703 avpkt.data = buf;
704 avpkt.size = buf_size;
705
706 return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
707 }
708 #endif
709
710 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
711 int *got_sub_ptr,
712 AVPacket *avpkt)
713 {
714 int ret;
715
716 avctx->pkt = avpkt;
717 *got_sub_ptr = 0;
718 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
719 if (*got_sub_ptr)
720 avctx->frame_number++;
721 return ret;
722 }
723
724 void avsubtitle_free(AVSubtitle *sub)
725 {
726 int i;
727
728 for (i = 0; i < sub->num_rects; i++)
729 {
730 av_freep(&sub->rects[i]->pict.data[0]);
731 av_freep(&sub->rects[i]->pict.data[1]);
732 av_freep(&sub->rects[i]->pict.data[2]);
733 av_freep(&sub->rects[i]->pict.data[3]);
734 av_freep(&sub->rects[i]->text);
735 av_freep(&sub->rects[i]->ass);
736 av_freep(&sub->rects[i]);
737 }
738
739 av_freep(&sub->rects);
740
741 memset(sub, 0, sizeof(AVSubtitle));
742 }
743
744 av_cold int avcodec_close(AVCodecContext *avctx)
745 {
746 /* If there is a user-supplied mutex locking routine, call it. */
747 if (ff_lockmgr_cb) {
748 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
749 return -1;
750 }
751
752 entangled_thread_counter++;
753 if(entangled_thread_counter != 1){
754 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
755 entangled_thread_counter--;
756 return -1;
757 }
758
759 if (HAVE_THREADS && avctx->thread_opaque)
760 avcodec_thread_free(avctx);
761 if (avctx->codec && avctx->codec->close)
762 avctx->codec->close(avctx);
763 avcodec_default_free_buffers(avctx);
764 avctx->coded_frame = NULL;
765 av_freep(&avctx->priv_data);
766 if(avctx->codec && avctx->codec->encode)
767 av_freep(&avctx->extradata);
768 avctx->codec = NULL;
769 entangled_thread_counter--;
770
771 /* Release any user-supplied mutex. */
772 if (ff_lockmgr_cb) {
773 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
774 }
775 return 0;
776 }
777
778 AVCodec *avcodec_find_encoder(enum CodecID id)
779 {
780 AVCodec *p, *experimental=NULL;
781 p = first_avcodec;
782 while (p) {
783 if (p->encode != NULL && p->id == id) {
784 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
785 experimental = p;
786 } else
787 return p;
788 }
789 p = p->next;
790 }
791 return experimental;
792 }
793
794 AVCodec *avcodec_find_encoder_by_name(const char *name)
795 {
796 AVCodec *p;
797 if (!name)
798 return NULL;
799 p = first_avcodec;
800 while (p) {
801 if (p->encode != NULL && strcmp(name,p->name) == 0)
802 return p;
803 p = p->next;
804 }
805 return NULL;
806 }
807
808 AVCodec *avcodec_find_decoder(enum CodecID id)
809 {
810 AVCodec *p;
811 p = first_avcodec;
812 while (p) {
813 if (p->decode != NULL && p->id == id)
814 return p;
815 p = p->next;
816 }
817 return NULL;
818 }
819
820 AVCodec *avcodec_find_decoder_by_name(const char *name)
821 {
822 AVCodec *p;
823 if (!name)
824 return NULL;
825 p = first_avcodec;
826 while (p) {
827 if (p->decode != NULL && strcmp(name,p->name) == 0)
828 return p;
829 p = p->next;
830 }
831 return NULL;
832 }
833
834 static int get_bit_rate(AVCodecContext *ctx)
835 {
836 int bit_rate;
837 int bits_per_sample;
838
839 switch(ctx->codec_type) {
840 case AVMEDIA_TYPE_VIDEO:
841 case AVMEDIA_TYPE_DATA:
842 case AVMEDIA_TYPE_SUBTITLE:
843 case AVMEDIA_TYPE_ATTACHMENT:
844 bit_rate = ctx->bit_rate;
845 break;
846 case AVMEDIA_TYPE_AUDIO:
847 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
848 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
849 break;
850 default:
851 bit_rate = 0;
852 break;
853 }
854 return bit_rate;
855 }
856
857 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
858 {
859 int i, len, ret = 0;
860
861 for (i = 0; i < 4; i++) {
862 len = snprintf(buf, buf_size,
863 isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
864 buf += len;
865 buf_size = buf_size > len ? buf_size - len : 0;
866 ret += len;
867 codec_tag>>=8;
868 }
869 return ret;
870 }
871
872 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
873 {
874 const char *codec_name;
875 const char *profile = NULL;
876 AVCodec *p;
877 char buf1[32];
878 int bitrate;
879 AVRational display_aspect_ratio;
880
881 if (encode)
882 p = avcodec_find_encoder(enc->codec_id);
883 else
884 p = avcodec_find_decoder(enc->codec_id);
885
886 if (p) {
887 codec_name = p->name;
888 profile = av_get_profile_name(p, enc->profile);
889 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
890 /* fake mpeg2 transport stream codec (currently not
891 registered) */
892 codec_name = "mpeg2ts";
893 } else if (enc->codec_name[0] != '\0') {
894 codec_name = enc->codec_name;
895 } else {
896 /* output avi tags */
897 char tag_buf[32];
898 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
899 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
900 codec_name = buf1;
901 }
902
903 switch(enc->codec_type) {
904 case AVMEDIA_TYPE_VIDEO:
905 snprintf(buf, buf_size,
906 "Video: %s%s",
907 codec_name, enc->mb_decision ? " (hq)" : "");
908 if (profile)
909 snprintf(buf + strlen(buf), buf_size - strlen(buf),
910 " (%s)", profile);
911 if (enc->pix_fmt != PIX_FMT_NONE) {
912 snprintf(buf + strlen(buf), buf_size - strlen(buf),
913 ", %s",
914 avcodec_get_pix_fmt_name(enc->pix_fmt));
915 }
916 if (enc->width) {
917 snprintf(buf + strlen(buf), buf_size - strlen(buf),
918 ", %dx%d",
919 enc->width, enc->height);
920 if (enc->sample_aspect_ratio.num) {
921 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
922 enc->width*enc->sample_aspect_ratio.num,
923 enc->height*enc->sample_aspect_ratio.den,
924 1024*1024);
925 snprintf(buf + strlen(buf), buf_size - strlen(buf),
926 " [PAR %d:%d DAR %d:%d]",
927 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
928 display_aspect_ratio.num, display_aspect_ratio.den);
929 }
930 if(av_log_get_level() >= AV_LOG_DEBUG){
931 int g= av_gcd(enc->time_base.num, enc->time_base.den);
932 snprintf(buf + strlen(buf), buf_size - strlen(buf),
933 ", %d/%d",
934 enc->time_base.num/g, enc->time_base.den/g);
935 }
936 }
937 if (encode) {
938 snprintf(buf + strlen(buf), buf_size - strlen(buf),
939 ", q=%d-%d", enc->qmin, enc->qmax);
940 }
941 break;
942 case AVMEDIA_TYPE_AUDIO:
943 snprintf(buf, buf_size,
944 "Audio: %s",
945 codec_name);
946 if (profile)
947 snprintf(buf + strlen(buf), buf_size - strlen(buf),
948 " (%s)", profile);
949 if (enc->sample_rate) {
950 snprintf(buf + strlen(buf), buf_size - strlen(buf),
951 ", %d Hz", enc->sample_rate);
952 }
953 av_strlcat(buf, ", ", buf_size);
954 av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
955 if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
956 snprintf(buf + strlen(buf), buf_size - strlen(buf),
957 ", %s", av_get_sample_fmt_name(enc->sample_fmt));
958 }
959 break;
960 case AVMEDIA_TYPE_DATA:
961 snprintf(buf, buf_size, "Data: %s", codec_name);
962 break;
963 case AVMEDIA_TYPE_SUBTITLE:
964 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
965 break;
966 case AVMEDIA_TYPE_ATTACHMENT:
967 snprintf(buf, buf_size, "Attachment: %s", codec_name);
968 break;
969 default:
970 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
971 return;
972 }
973 if (encode) {
974 if (enc->flags & CODEC_FLAG_PASS1)
975 snprintf(buf + strlen(buf), buf_size - strlen(buf),
976 ", pass 1");
977 if (enc->flags & CODEC_FLAG_PASS2)
978 snprintf(buf + strlen(buf), buf_size - strlen(buf),
979 ", pass 2");
980 }
981 bitrate = get_bit_rate(enc);
982 if (bitrate != 0) {
983 snprintf(buf + strlen(buf), buf_size - strlen(buf),
984 ", %d kb/s", bitrate / 1000);
985 }
986 }
987
988 const char *av_get_profile_name(const AVCodec *codec, int profile)
989 {
990 const AVProfile *p;
991 if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
992 return NULL;
993
994 for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
995 if (p->profile == profile)
996 return p->name;
997
998 return NULL;
999 }
1000
1001 unsigned avcodec_version( void )
1002 {
1003 return LIBAVCODEC_VERSION_INT;
1004 }
1005
1006 const char *avcodec_configuration(void)
1007 {
1008 return FFMPEG_CONFIGURATION;
1009 }
1010
1011 const char *avcodec_license(void)
1012 {
1013 #define LICENSE_PREFIX "libavcodec license: "
1014 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1015 }
1016
1017 void avcodec_init(void)
1018 {
1019 static int initialized = 0;
1020
1021 if (initialized != 0)
1022 return;
1023 initialized = 1;
1024
1025 dsputil_static_init();
1026 }
1027
1028 void avcodec_flush_buffers(AVCodecContext *avctx)
1029 {
1030 if(avctx->codec->flush)
1031 avctx->codec->flush(avctx);
1032 }
1033
1034 void avcodec_default_free_buffers(AVCodecContext *s){
1035 int i, j;
1036
1037 if(s->internal_buffer==NULL) return;
1038
1039 if (s->internal_buffer_count)
1040 av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
1041 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
1042 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
1043 for(j=0; j<4; j++){
1044 av_freep(&buf->base[j]);
1045 buf->data[j]= NULL;
1046 }
1047 }
1048 av_freep(&s->internal_buffer);
1049
1050 s->internal_buffer_count=0;
1051 }
1052
1053 char av_get_pict_type_char(int pict_type){
1054 switch(pict_type){
1055 case FF_I_TYPE: return 'I';
1056 case FF_P_TYPE: return 'P';
1057 case FF_B_TYPE: return 'B';
1058 case FF_S_TYPE: return 'S';
1059 case FF_SI_TYPE:return 'i';
1060 case FF_SP_TYPE:return 'p';
1061 case FF_BI_TYPE:return 'b';
1062 default: return '?';
1063 }
1064 }
1065
1066 int av_get_bits_per_sample(enum CodecID codec_id){
1067 switch(codec_id){
1068 case CODEC_ID_ADPCM_SBPRO_2:
1069 return 2;
1070 case CODEC_ID_ADPCM_SBPRO_3:
1071 return 3;
1072 case CODEC_ID_ADPCM_SBPRO_4:
1073 case CODEC_ID_ADPCM_CT:
1074 case CODEC_ID_ADPCM_IMA_WAV:
1075 case CODEC_ID_ADPCM_MS:
1076 case CODEC_ID_ADPCM_YAMAHA:
1077 return 4;
1078 case CODEC_ID_PCM_ALAW:
1079 case CODEC_ID_PCM_MULAW:
1080 case CODEC_ID_PCM_S8:
1081 case CODEC_ID_PCM_U8:
1082 case CODEC_ID_PCM_ZORK:
1083 return 8;
1084 case CODEC_ID_PCM_S16BE:
1085 case CODEC_ID_PCM_S16LE:
1086 case CODEC_ID_PCM_S16LE_PLANAR:
1087 case CODEC_ID_PCM_U16BE:
1088 case CODEC_ID_PCM_U16LE:
1089 return 16;
1090 case CODEC_ID_PCM_S24DAUD:
1091 case CODEC_ID_PCM_S24BE:
1092 case CODEC_ID_PCM_S24LE:
1093 case CODEC_ID_PCM_U24BE:
1094 case CODEC_ID_PCM_U24LE:
1095 return 24;
1096 case CODEC_ID_PCM_S32BE:
1097 case CODEC_ID_PCM_S32LE:
1098 case CODEC_ID_PCM_U32BE:
1099 case CODEC_ID_PCM_U32LE:
1100 case CODEC_ID_PCM_F32BE:
1101 case CODEC_ID_PCM_F32LE:
1102 return 32;
1103 case CODEC_ID_PCM_F64BE:
1104 case CODEC_ID_PCM_F64LE:
1105 return 64;
1106 default:
1107 return 0;
1108 }
1109 }
1110
1111 #if FF_API_OLD_SAMPLE_FMT
1112 int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt) {
1113 return av_get_bits_per_sample_fmt(sample_fmt);
1114 }
1115 #endif
1116
1117 #if !HAVE_THREADS
1118 int avcodec_thread_init(AVCodecContext *s, int thread_count){
1119 s->thread_count = thread_count;
1120 return -1;
1121 }
1122 #endif
1123
1124 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1125 {
1126 unsigned int n = 0;
1127
1128 while(v >= 0xff) {
1129 *s++ = 0xff;
1130 v -= 0xff;
1131 n++;
1132 }
1133 *s = v;
1134 n++;
1135 return n;
1136 }
1137
1138 #if LIBAVCODEC_VERSION_MAJOR < 53
1139 #include "libavcore/parseutils.h"
1140
1141 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1142 {
1143 return av_parse_video_size(width_ptr, height_ptr, str);
1144 }
1145
1146 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1147 {
1148 return av_parse_video_rate(frame_rate, arg);
1149 }
1150 #endif
1151
1152 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1153 int i;
1154 for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1155 return i;
1156 }
1157
1158 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1159 {
1160 av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1161 "version to the newest one from Git. If the problem still "
1162 "occurs, it means that your file has a feature which has not "
1163 "been implemented.", feature);
1164 if(want_sample)
1165 av_log_ask_for_sample(avc, NULL);
1166 else
1167 av_log(avc, AV_LOG_WARNING, "\n");
1168 }
1169
1170 void av_log_ask_for_sample(void *avc, const char *msg)
1171 {
1172 if (msg)
1173 av_log(avc, AV_LOG_WARNING, "%s ", msg);
1174 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1175 "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1176 "and contact the ffmpeg-devel mailing list.\n");
1177 }
1178
1179 static AVHWAccel *first_hwaccel = NULL;
1180
1181 void av_register_hwaccel(AVHWAccel *hwaccel)
1182 {
1183 AVHWAccel **p = &first_hwaccel;
1184 while (*p)
1185 p = &(*p)->next;
1186 *p = hwaccel;
1187 hwaccel->next = NULL;
1188 }
1189
1190 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1191 {
1192 return hwaccel ? hwaccel->next : first_hwaccel;
1193 }
1194
1195 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1196 {
1197 AVHWAccel *hwaccel=NULL;
1198
1199 while((hwaccel= av_hwaccel_next(hwaccel))){
1200 if ( hwaccel->id == codec_id
1201 && hwaccel->pix_fmt == pix_fmt)
1202 return hwaccel;
1203 }
1204 return NULL;
1205 }
1206
1207 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1208 {
1209 if (ff_lockmgr_cb) {
1210 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1211 return -1;
1212 }
1213
1214 ff_lockmgr_cb = cb;
1215
1216 if (ff_lockmgr_cb) {
1217 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1218 return -1;
1219 }
1220 return 0;
1221 }
1222
1223 unsigned int ff_toupper4(unsigned int x)
1224 {
1225 return toupper( x &0xFF)
1226 + (toupper((x>>8 )&0xFF)<<8 )
1227 + (toupper((x>>16)&0xFF)<<16)
1228 + (toupper((x>>24)&0xFF)<<24);
1229 }