184f67e5661abad68119931cd3023cfad2b8ee6c
[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 Libav.
7 *
8 * Libav 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 * Libav 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 Libav; 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/avassert.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/crc.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/pixdesc.h"
33 #include "libavutil/audioconvert.h"
34 #include "libavutil/imgutils.h"
35 #include "libavutil/samplefmt.h"
36 #include "libavutil/dict.h"
37 #include "avcodec.h"
38 #include "dsputil.h"
39 #include "libavutil/opt.h"
40 #include "imgconvert.h"
41 #include "thread.h"
42 #include "audioconvert.h"
43 #include "internal.h"
44 #include "bytestream.h"
45 #include <stdlib.h>
46 #include <stdarg.h>
47 #include <limits.h>
48 #include <float.h>
49
50 static int volatile entangled_thread_counter=0;
51 static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
52 static void *codec_mutex;
53 static void *avformat_mutex;
54
55 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
56 {
57 if(min_size < *size)
58 return ptr;
59
60 min_size= FFMAX(17*min_size/16 + 32, min_size);
61
62 ptr= av_realloc(ptr, min_size);
63 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
64 min_size= 0;
65
66 *size= min_size;
67
68 return ptr;
69 }
70
71 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
72 {
73 void **p = ptr;
74 if (min_size < *size)
75 return;
76 min_size= FFMAX(17*min_size/16 + 32, min_size);
77 av_free(*p);
78 *p = av_malloc(min_size);
79 if (!*p) min_size = 0;
80 *size= min_size;
81 }
82
83 /* encoder management */
84 static AVCodec *first_avcodec = NULL;
85
86 AVCodec *av_codec_next(AVCodec *c){
87 if(c) return c->next;
88 else return first_avcodec;
89 }
90
91 #if !FF_API_AVCODEC_INIT
92 static
93 #endif
94 void avcodec_init(void)
95 {
96 static int initialized = 0;
97
98 if (initialized != 0)
99 return;
100 initialized = 1;
101
102 dsputil_static_init();
103 }
104
105 static av_always_inline int codec_is_encoder(AVCodec *codec)
106 {
107 return codec && (codec->encode || codec->encode2);
108 }
109
110 static av_always_inline int codec_is_decoder(AVCodec *codec)
111 {
112 return codec && codec->decode;
113 }
114
115 void avcodec_register(AVCodec *codec)
116 {
117 AVCodec **p;
118 avcodec_init();
119 p = &first_avcodec;
120 while (*p != NULL) p = &(*p)->next;
121 *p = codec;
122 codec->next = NULL;
123
124 if (codec->init_static_data)
125 codec->init_static_data(codec);
126 }
127
128 unsigned avcodec_get_edge_width(void)
129 {
130 return EDGE_WIDTH;
131 }
132
133 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
134 s->coded_width = width;
135 s->coded_height= height;
136 s->width = -((-width )>>s->lowres);
137 s->height= -((-height)>>s->lowres);
138 }
139
140 #define INTERNAL_BUFFER_SIZE (32+1)
141
142 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
143 int linesize_align[AV_NUM_DATA_POINTERS])
144 {
145 int i;
146 int w_align= 1;
147 int h_align= 1;
148
149 switch(s->pix_fmt){
150 case PIX_FMT_YUV420P:
151 case PIX_FMT_YUYV422:
152 case PIX_FMT_UYVY422:
153 case PIX_FMT_YUV422P:
154 case PIX_FMT_YUV440P:
155 case PIX_FMT_YUV444P:
156 case PIX_FMT_GBRP:
157 case PIX_FMT_GRAY8:
158 case PIX_FMT_GRAY16BE:
159 case PIX_FMT_GRAY16LE:
160 case PIX_FMT_YUVJ420P:
161 case PIX_FMT_YUVJ422P:
162 case PIX_FMT_YUVJ440P:
163 case PIX_FMT_YUVJ444P:
164 case PIX_FMT_YUVA420P:
165 case PIX_FMT_YUV420P9LE:
166 case PIX_FMT_YUV420P9BE:
167 case PIX_FMT_YUV420P10LE:
168 case PIX_FMT_YUV420P10BE:
169 case PIX_FMT_YUV422P9LE:
170 case PIX_FMT_YUV422P9BE:
171 case PIX_FMT_YUV422P10LE:
172 case PIX_FMT_YUV422P10BE:
173 case PIX_FMT_YUV444P9LE:
174 case PIX_FMT_YUV444P9BE:
175 case PIX_FMT_YUV444P10LE:
176 case PIX_FMT_YUV444P10BE:
177 case PIX_FMT_GBRP9LE:
178 case PIX_FMT_GBRP9BE:
179 case PIX_FMT_GBRP10LE:
180 case PIX_FMT_GBRP10BE:
181 w_align = 16; //FIXME assume 16 pixel per macroblock
182 h_align = 16 * 2; // interlaced needs 2 macroblocks height
183 break;
184 case PIX_FMT_YUV411P:
185 case PIX_FMT_UYYVYY411:
186 w_align=32;
187 h_align=8;
188 break;
189 case PIX_FMT_YUV410P:
190 if(s->codec_id == CODEC_ID_SVQ1){
191 w_align=64;
192 h_align=64;
193 }
194 case PIX_FMT_RGB555:
195 if(s->codec_id == CODEC_ID_RPZA){
196 w_align=4;
197 h_align=4;
198 }
199 case PIX_FMT_PAL8:
200 case PIX_FMT_BGR8:
201 case PIX_FMT_RGB8:
202 if(s->codec_id == CODEC_ID_SMC){
203 w_align=4;
204 h_align=4;
205 }
206 break;
207 case PIX_FMT_BGR24:
208 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
209 w_align=4;
210 h_align=4;
211 }
212 break;
213 default:
214 w_align= 1;
215 h_align= 1;
216 break;
217 }
218
219 *width = FFALIGN(*width , w_align);
220 *height= FFALIGN(*height, h_align);
221 if(s->codec_id == CODEC_ID_H264 || s->lowres)
222 *height+=2; // some of the optimized chroma MC reads one line too much
223 // which is also done in mpeg decoders with lowres > 0
224
225 for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
226 linesize_align[i] = STRIDE_ALIGN;
227 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
228 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
229 //picture size unneccessarily in some cases. The solution here is not
230 //pretty and better ideas are welcome!
231 #if HAVE_MMX
232 if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
233 s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
234 s->codec_id == CODEC_ID_VP6A) {
235 for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
236 linesize_align[i] = 16;
237 }
238 #endif
239 }
240
241 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
242 int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
243 int linesize_align[AV_NUM_DATA_POINTERS];
244 int align;
245 avcodec_align_dimensions2(s, width, height, linesize_align);
246 align = FFMAX(linesize_align[0], linesize_align[3]);
247 linesize_align[1] <<= chroma_shift;
248 linesize_align[2] <<= chroma_shift;
249 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
250 *width=FFALIGN(*width, align);
251 }
252
253 int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
254 enum AVSampleFormat sample_fmt, const uint8_t *buf,
255 int buf_size, int align)
256 {
257 int ch, planar, needed_size, ret = 0;
258
259 needed_size = av_samples_get_buffer_size(NULL, nb_channels,
260 frame->nb_samples, sample_fmt,
261 align);
262 if (buf_size < needed_size)
263 return AVERROR(EINVAL);
264
265 planar = av_sample_fmt_is_planar(sample_fmt);
266 if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
267 if (!(frame->extended_data = av_mallocz(nb_channels *
268 sizeof(*frame->extended_data))))
269 return AVERROR(ENOMEM);
270 } else {
271 frame->extended_data = frame->data;
272 }
273
274 if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
275 buf, nb_channels, frame->nb_samples,
276 sample_fmt, align)) < 0) {
277 if (frame->extended_data != frame->data)
278 av_free(frame->extended_data);
279 return ret;
280 }
281 if (frame->extended_data != frame->data) {
282 for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
283 frame->data[ch] = frame->extended_data[ch];
284 }
285
286 return ret;
287 }
288
289 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
290 {
291 AVCodecInternal *avci = avctx->internal;
292 InternalBuffer *buf;
293 int buf_size, ret;
294
295 buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
296 frame->nb_samples, avctx->sample_fmt,
297 32);
298 if (buf_size < 0)
299 return AVERROR(EINVAL);
300
301 /* allocate InternalBuffer if needed */
302 if (!avci->buffer) {
303 avci->buffer = av_mallocz(sizeof(InternalBuffer));
304 if (!avci->buffer)
305 return AVERROR(ENOMEM);
306 }
307 buf = avci->buffer;
308
309 /* if there is a previously-used internal buffer, check its size and
310 channel count to see if we can reuse it */
311 if (buf->extended_data) {
312 /* if current buffer is too small, free it */
313 if (buf->extended_data[0] && buf_size > buf->audio_data_size) {
314 av_free(buf->extended_data[0]);
315 if (buf->extended_data != buf->data)
316 av_free(&buf->extended_data);
317 buf->extended_data = NULL;
318 buf->data[0] = NULL;
319 }
320 /* if number of channels has changed, reset and/or free extended data
321 pointers but leave data buffer in buf->data[0] for reuse */
322 if (buf->nb_channels != avctx->channels) {
323 if (buf->extended_data != buf->data)
324 av_free(buf->extended_data);
325 buf->extended_data = NULL;
326 }
327 }
328
329 /* if there is no previous buffer or the previous buffer cannot be used
330 as-is, allocate a new buffer and/or rearrange the channel pointers */
331 if (!buf->extended_data) {
332 if (!buf->data[0]) {
333 if (!(buf->data[0] = av_mallocz(buf_size)))
334 return AVERROR(ENOMEM);
335 buf->audio_data_size = buf_size;
336 }
337 if ((ret = avcodec_fill_audio_frame(frame, avctx->channels,
338 avctx->sample_fmt, buf->data[0],
339 buf->audio_data_size, 32)))
340 return ret;
341
342 if (frame->extended_data == frame->data)
343 buf->extended_data = buf->data;
344 else
345 buf->extended_data = frame->extended_data;
346 memcpy(buf->data, frame->data, sizeof(frame->data));
347 buf->linesize[0] = frame->linesize[0];
348 buf->nb_channels = avctx->channels;
349 } else {
350 /* copy InternalBuffer info to the AVFrame */
351 frame->extended_data = buf->extended_data;
352 frame->linesize[0] = buf->linesize[0];
353 memcpy(frame->data, buf->data, sizeof(frame->data));
354 }
355
356 frame->type = FF_BUFFER_TYPE_INTERNAL;
357
358 if (avctx->pkt) frame->pkt_pts = avctx->pkt->pts;
359 else frame->pkt_pts = AV_NOPTS_VALUE;
360 frame->reordered_opaque = avctx->reordered_opaque;
361
362 if (avctx->debug & FF_DEBUG_BUFFERS)
363 av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p, "
364 "internal audio buffer used\n", frame);
365
366 return 0;
367 }
368
369 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
370 {
371 int i;
372 int w= s->width;
373 int h= s->height;
374 InternalBuffer *buf;
375 AVCodecInternal *avci = s->internal;
376
377 if(pic->data[0]!=NULL) {
378 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
379 return -1;
380 }
381 if(avci->buffer_count >= INTERNAL_BUFFER_SIZE) {
382 av_log(s, AV_LOG_ERROR, "buffer_count overflow (missing release_buffer?)\n");
383 return -1;
384 }
385
386 if(av_image_check_size(w, h, 0, s))
387 return -1;
388
389 if (!avci->buffer) {
390 avci->buffer = av_mallocz((INTERNAL_BUFFER_SIZE+1) *
391 sizeof(InternalBuffer));
392 }
393
394 buf = &avci->buffer[avci->buffer_count];
395
396 if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
397 if(s->active_thread_type&FF_THREAD_FRAME) {
398 av_log_missing_feature(s, "Width/height changing with frame threads is", 0);
399 return -1;
400 }
401
402 for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
403 av_freep(&buf->base[i]);
404 buf->data[i]= NULL;
405 }
406 }
407
408 if (!buf->base[0]) {
409 int h_chroma_shift, v_chroma_shift;
410 int size[4] = {0};
411 int tmpsize;
412 int unaligned;
413 AVPicture picture;
414 int stride_align[AV_NUM_DATA_POINTERS];
415 const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
416
417 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
418
419 avcodec_align_dimensions2(s, &w, &h, stride_align);
420
421 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
422 w+= EDGE_WIDTH*2;
423 h+= EDGE_WIDTH*2;
424 }
425
426 do {
427 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
428 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
429 av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
430 // increase alignment of w for next try (rhs gives the lowest bit set in w)
431 w += w & ~(w-1);
432
433 unaligned = 0;
434 for (i=0; i<4; i++){
435 unaligned |= picture.linesize[i] % stride_align[i];
436 }
437 } while (unaligned);
438
439 tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
440 if (tmpsize < 0)
441 return -1;
442
443 for (i=0; i<3 && picture.data[i+1]; i++)
444 size[i] = picture.data[i+1] - picture.data[i];
445 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
446
447 memset(buf->base, 0, sizeof(buf->base));
448 memset(buf->data, 0, sizeof(buf->data));
449
450 for(i=0; i<4 && size[i]; i++){
451 const int h_shift= i==0 ? 0 : h_chroma_shift;
452 const int v_shift= i==0 ? 0 : v_chroma_shift;
453
454 buf->linesize[i]= picture.linesize[i];
455
456 buf->base[i]= av_malloc(size[i]+16); //FIXME 16
457 if(buf->base[i]==NULL) return -1;
458 memset(buf->base[i], 128, size[i]);
459
460 // no edge if EDGE EMU or not planar YUV
461 if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
462 buf->data[i] = buf->base[i];
463 else
464 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (pixel_size*EDGE_WIDTH>>h_shift), stride_align[i]);
465 }
466 for (; i < AV_NUM_DATA_POINTERS; i++) {
467 buf->base[i] = buf->data[i] = NULL;
468 buf->linesize[i] = 0;
469 }
470 if(size[1] && !size[2])
471 ff_set_systematic_pal2((uint32_t*)buf->data[1], s->pix_fmt);
472 buf->width = s->width;
473 buf->height = s->height;
474 buf->pix_fmt= s->pix_fmt;
475 }
476 pic->type= FF_BUFFER_TYPE_INTERNAL;
477
478 for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
479 pic->base[i]= buf->base[i];
480 pic->data[i]= buf->data[i];
481 pic->linesize[i]= buf->linesize[i];
482 }
483 pic->extended_data = pic->data;
484 avci->buffer_count++;
485
486 if(s->pkt) pic->pkt_pts= s->pkt->pts;
487 else pic->pkt_pts= AV_NOPTS_VALUE;
488 pic->reordered_opaque= s->reordered_opaque;
489
490 if(s->debug&FF_DEBUG_BUFFERS)
491 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d "
492 "buffers used\n", pic, avci->buffer_count);
493
494 return 0;
495 }
496
497 int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame)
498 {
499 switch (avctx->codec_type) {
500 case AVMEDIA_TYPE_VIDEO:
501 return video_get_buffer(avctx, frame);
502 case AVMEDIA_TYPE_AUDIO:
503 return audio_get_buffer(avctx, frame);
504 default:
505 return -1;
506 }
507 }
508
509 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
510 int i;
511 InternalBuffer *buf, *last;
512 AVCodecInternal *avci = s->internal;
513
514 assert(s->codec_type == AVMEDIA_TYPE_VIDEO);
515
516 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
517 assert(avci->buffer_count);
518
519 if (avci->buffer) {
520 buf = NULL; /* avoids warning */
521 for (i = 0; i < avci->buffer_count; i++) { //just 3-5 checks so is not worth to optimize
522 buf = &avci->buffer[i];
523 if (buf->data[0] == pic->data[0])
524 break;
525 }
526 assert(i < avci->buffer_count);
527 avci->buffer_count--;
528 last = &avci->buffer[avci->buffer_count];
529
530 if (buf != last)
531 FFSWAP(InternalBuffer, *buf, *last);
532 }
533
534 for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
535 pic->data[i]=NULL;
536 // pic->base[i]=NULL;
537 }
538 //printf("R%X\n", pic->opaque);
539
540 if(s->debug&FF_DEBUG_BUFFERS)
541 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d "
542 "buffers used\n", pic, avci->buffer_count);
543 }
544
545 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
546 AVFrame temp_pic;
547 int i;
548
549 assert(s->codec_type == AVMEDIA_TYPE_VIDEO);
550
551 /* If no picture return a new buffer */
552 if(pic->data[0] == NULL) {
553 /* We will copy from buffer, so must be readable */
554 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
555 return s->get_buffer(s, pic);
556 }
557
558 /* If internal buffer type return the same buffer */
559 if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
560 if(s->pkt) pic->pkt_pts= s->pkt->pts;
561 else pic->pkt_pts= AV_NOPTS_VALUE;
562 pic->reordered_opaque= s->reordered_opaque;
563 return 0;
564 }
565
566 /*
567 * Not internal type and reget_buffer not overridden, emulate cr buffer
568 */
569 temp_pic = *pic;
570 for(i = 0; i < AV_NUM_DATA_POINTERS; i++)
571 pic->data[i] = pic->base[i] = NULL;
572 pic->opaque = NULL;
573 /* Allocate new frame */
574 if (s->get_buffer(s, pic))
575 return -1;
576 /* Copy image data from old buffer to new buffer */
577 av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
578 s->height);
579 s->release_buffer(s, &temp_pic); // Release old frame
580 return 0;
581 }
582
583 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
584 int i;
585
586 for(i=0; i<count; i++){
587 int r= func(c, (char*)arg + i*size);
588 if(ret) ret[i]= r;
589 }
590 return 0;
591 }
592
593 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
594 int i;
595
596 for(i=0; i<count; i++){
597 int r= func(c, arg, i, 0);
598 if(ret) ret[i]= r;
599 }
600 return 0;
601 }
602
603 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
604 while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
605 ++fmt;
606 return fmt[0];
607 }
608
609 void avcodec_get_frame_defaults(AVFrame *pic){
610 memset(pic, 0, sizeof(AVFrame));
611
612 pic->pts= AV_NOPTS_VALUE;
613 pic->key_frame= 1;
614 pic->sample_aspect_ratio = (AVRational){0, 1};
615 pic->format = -1; /* unknown */
616 }
617
618 AVFrame *avcodec_alloc_frame(void){
619 AVFrame *pic= av_malloc(sizeof(AVFrame));
620
621 if(pic==NULL) return NULL;
622
623 avcodec_get_frame_defaults(pic);
624
625 return pic;
626 }
627
628 #if FF_API_AVCODEC_OPEN
629 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
630 {
631 return avcodec_open2(avctx, codec, NULL);
632 }
633 #endif
634
635 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options)
636 {
637 int ret = 0;
638 AVDictionary *tmp = NULL;
639
640 if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
641 return AVERROR(EINVAL);
642
643 if (options)
644 av_dict_copy(&tmp, *options, 0);
645
646 /* If there is a user-supplied mutex locking routine, call it. */
647 if (ff_lockmgr_cb) {
648 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
649 return -1;
650 }
651
652 entangled_thread_counter++;
653 if(entangled_thread_counter != 1){
654 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
655 ret = -1;
656 goto end;
657 }
658
659 if(avctx->codec || !codec) {
660 ret = AVERROR(EINVAL);
661 goto end;
662 }
663
664 avctx->internal = av_mallocz(sizeof(AVCodecInternal));
665 if (!avctx->internal) {
666 ret = AVERROR(ENOMEM);
667 goto end;
668 }
669
670 if (codec->priv_data_size > 0) {
671 if(!avctx->priv_data){
672 avctx->priv_data = av_mallocz(codec->priv_data_size);
673 if (!avctx->priv_data) {
674 ret = AVERROR(ENOMEM);
675 goto end;
676 }
677 if (codec->priv_class) {
678 *(AVClass**)avctx->priv_data= codec->priv_class;
679 av_opt_set_defaults(avctx->priv_data);
680 }
681 }
682 if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
683 goto free_and_end;
684 } else {
685 avctx->priv_data = NULL;
686 }
687 if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
688 goto free_and_end;
689
690 if(avctx->coded_width && avctx->coded_height)
691 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
692 else if(avctx->width && avctx->height)
693 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
694
695 if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
696 && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
697 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
698 av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
699 avcodec_set_dimensions(avctx, 0, 0);
700 }
701
702 /* if the decoder init function was already called previously,
703 free the already allocated subtitle_header before overwriting it */
704 if (codec_is_decoder(codec))
705 av_freep(&avctx->subtitle_header);
706
707 #define SANE_NB_CHANNELS 128U
708 if (avctx->channels > SANE_NB_CHANNELS) {
709 ret = AVERROR(EINVAL);
710 goto free_and_end;
711 }
712
713 avctx->codec = codec;
714 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
715 avctx->codec_id == CODEC_ID_NONE) {
716 avctx->codec_type = codec->type;
717 avctx->codec_id = codec->id;
718 }
719 if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
720 && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
721 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
722 ret = AVERROR(EINVAL);
723 goto free_and_end;
724 }
725 avctx->frame_number = 0;
726 #if FF_API_ER
727
728 av_log(avctx, AV_LOG_DEBUG, "err{or,}_recognition separate: %d; %d\n",
729 avctx->error_recognition, avctx->err_recognition);
730 /* FF_ER_CAREFUL (==1) implies AV_EF_CRCCHECK (== 1<<1 - 1),
731 FF_ER_COMPLIANT (==2) implies AV_EF_{CRCCHECK,BITSTREAM} (== 1<<2 - 1), et cetera} */
732 avctx->err_recognition |= (1<<(avctx->error_recognition-(avctx->error_recognition>=FF_ER_VERY_AGGRESSIVE))) - 1;
733 av_log(avctx, AV_LOG_DEBUG, "err{or,}_recognition combined: %d; %d\n",
734 avctx->error_recognition, avctx->err_recognition);
735 #endif
736
737 if (HAVE_THREADS && !avctx->thread_opaque) {
738 ret = ff_thread_init(avctx);
739 if (ret < 0) {
740 goto free_and_end;
741 }
742 }
743 if (!HAVE_THREADS && !(codec->capabilities & CODEC_CAP_AUTO_THREADS))
744 avctx->thread_count = 1;
745
746 if (avctx->codec->max_lowres < avctx->lowres) {
747 av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
748 avctx->codec->max_lowres);
749 ret = AVERROR(EINVAL);
750 goto free_and_end;
751 }
752 if (codec_is_encoder(avctx->codec)) {
753 int i;
754 if (avctx->codec->sample_fmts) {
755 for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++)
756 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
757 break;
758 if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
759 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
760 ret = AVERROR(EINVAL);
761 goto free_and_end;
762 }
763 }
764 if (avctx->codec->supported_samplerates) {
765 for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
766 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
767 break;
768 if (avctx->codec->supported_samplerates[i] == 0) {
769 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
770 ret = AVERROR(EINVAL);
771 goto free_and_end;
772 }
773 }
774 if (avctx->codec->channel_layouts) {
775 if (!avctx->channel_layout) {
776 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
777 } else {
778 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
779 if (avctx->channel_layout == avctx->codec->channel_layouts[i])
780 break;
781 if (avctx->codec->channel_layouts[i] == 0) {
782 av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
783 ret = AVERROR(EINVAL);
784 goto free_and_end;
785 }
786 }
787 }
788 if (avctx->channel_layout && avctx->channels) {
789 if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
790 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
791 ret = AVERROR(EINVAL);
792 goto free_and_end;
793 }
794 } else if (avctx->channel_layout) {
795 avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
796 }
797 }
798
799 if(avctx->codec->init && !(avctx->active_thread_type&FF_THREAD_FRAME)){
800 ret = avctx->codec->init(avctx);
801 if (ret < 0) {
802 goto free_and_end;
803 }
804 }
805 end:
806 entangled_thread_counter--;
807
808 /* Release any user-supplied mutex. */
809 if (ff_lockmgr_cb) {
810 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
811 }
812 if (options) {
813 av_dict_free(options);
814 *options = tmp;
815 }
816
817 return ret;
818 free_and_end:
819 av_dict_free(&tmp);
820 av_freep(&avctx->priv_data);
821 av_freep(&avctx->internal);
822 avctx->codec= NULL;
823 goto end;
824 }
825
826 int ff_alloc_packet(AVPacket *avpkt, int size)
827 {
828 if (size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
829 return AVERROR(EINVAL);
830
831 if (avpkt->data) {
832 uint8_t *pkt_data;
833 int pkt_size;
834
835 if (avpkt->size < size)
836 return AVERROR(EINVAL);
837
838 pkt_data = avpkt->data;
839 pkt_size = avpkt->size;
840 av_init_packet(avpkt);
841 avpkt->data = pkt_data;
842 avpkt->size = pkt_size;
843 return 0;
844 } else {
845 return av_new_packet(avpkt, size);
846 }
847 }
848
849 int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
850 AVPacket *avpkt,
851 const AVFrame *frame,
852 int *got_packet_ptr)
853 {
854 int ret;
855 int user_packet = !!avpkt->data;
856 int nb_samples;
857
858 if (!(avctx->codec->capabilities & CODEC_CAP_DELAY) && !frame) {
859 av_init_packet(avpkt);
860 avpkt->size = 0;
861 return 0;
862 }
863
864 /* check for valid frame size */
865 if (frame) {
866 nb_samples = frame->nb_samples;
867 if (avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
868 if (nb_samples > avctx->frame_size)
869 return AVERROR(EINVAL);
870 } else if (!(avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)) {
871 if (nb_samples != avctx->frame_size)
872 return AVERROR(EINVAL);
873 }
874 } else {
875 nb_samples = avctx->frame_size;
876 }
877
878 if (avctx->codec->encode2) {
879 *got_packet_ptr = 0;
880 ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
881 if (!ret && *got_packet_ptr &&
882 !(avctx->codec->capabilities & CODEC_CAP_DELAY)) {
883 avpkt->pts = frame->pts;
884 avpkt->duration = av_rescale_q(frame->nb_samples,
885 (AVRational){ 1, avctx->sample_rate },
886 avctx->time_base);
887 }
888 } else {
889 /* for compatibility with encoders not supporting encode2(), we need to
890 allocate a packet buffer if the user has not provided one or check
891 the size otherwise */
892 int fs_tmp = 0;
893 int buf_size = avpkt->size;
894 if (!user_packet) {
895 if (avctx->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE) {
896 av_assert0(av_get_bits_per_sample(avctx->codec_id) != 0);
897 buf_size = nb_samples * avctx->channels *
898 av_get_bits_per_sample(avctx->codec_id) / 8;
899 } else {
900 /* this is a guess as to the required size.
901 if an encoder needs more than this, it should probably
902 implement encode2() */
903 buf_size = 2 * avctx->frame_size * avctx->channels *
904 av_get_bytes_per_sample(avctx->sample_fmt);
905 buf_size += FF_MIN_BUFFER_SIZE;
906 }
907 }
908 if ((ret = ff_alloc_packet(avpkt, buf_size)))
909 return ret;
910
911 /* Encoders using AVCodec.encode() that support
912 CODEC_CAP_SMALL_LAST_FRAME require avctx->frame_size to be set to
913 the smaller size when encoding the last frame.
914 This code can be removed once all encoders supporting
915 CODEC_CAP_SMALL_LAST_FRAME use encode2() */
916 if ((avctx->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) &&
917 nb_samples < avctx->frame_size) {
918 fs_tmp = avctx->frame_size;
919 avctx->frame_size = nb_samples;
920 }
921
922 /* encode the frame */
923 ret = avctx->codec->encode(avctx, avpkt->data, avpkt->size,
924 frame ? frame->data[0] : NULL);
925 if (ret >= 0) {
926 if (!ret) {
927 /* no output. if the packet data was allocated by libavcodec,
928 free it */
929 if (!user_packet)
930 av_freep(&avpkt->data);
931 } else {
932 if (avctx->coded_frame)
933 avpkt->pts = avctx->coded_frame->pts;
934 /* Set duration for final small packet. This can be removed
935 once all encoders supporting CODEC_CAP_SMALL_LAST_FRAME use
936 encode2() */
937 if (fs_tmp) {
938 avpkt->duration = av_rescale_q(avctx->frame_size,
939 (AVRational){ 1, avctx->sample_rate },
940 avctx->time_base);
941 }
942 }
943 avpkt->size = ret;
944 *got_packet_ptr = (ret > 0);
945 ret = 0;
946 }
947
948 if (fs_tmp)
949 avctx->frame_size = fs_tmp;
950 }
951 if (!ret)
952 avctx->frame_number++;
953
954 /* NOTE: if we add any audio encoders which output non-keyframe packets,
955 this needs to be moved to the encoders, but for now we can do it
956 here to simplify things */
957 avpkt->flags |= AV_PKT_FLAG_KEY;
958
959 return ret;
960 }
961
962 #if FF_API_OLD_DECODE_AUDIO
963 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx,
964 uint8_t *buf, int buf_size,
965 const short *samples)
966 {
967 AVPacket pkt;
968 AVFrame frame0;
969 AVFrame *frame;
970 int ret, samples_size, got_packet;
971
972 av_init_packet(&pkt);
973 pkt.data = buf;
974 pkt.size = buf_size;
975
976 if (samples) {
977 frame = &frame0;
978 avcodec_get_frame_defaults(frame);
979
980 if (avctx->frame_size) {
981 frame->nb_samples = avctx->frame_size;
982 } else {
983 /* if frame_size is not set, the number of samples must be
984 calculated from the buffer size */
985 int64_t nb_samples;
986 if (!av_get_bits_per_sample(avctx->codec_id)) {
987 av_log(avctx, AV_LOG_ERROR, "avcodec_encode_audio() does not "
988 "support this codec\n");
989 return AVERROR(EINVAL);
990 }
991 nb_samples = (int64_t)buf_size * 8 /
992 (av_get_bits_per_sample(avctx->codec_id) *
993 avctx->channels);
994 if (nb_samples >= INT_MAX)
995 return AVERROR(EINVAL);
996 frame->nb_samples = nb_samples;
997 }
998
999 /* it is assumed that the samples buffer is large enough based on the
1000 relevant parameters */
1001 samples_size = av_samples_get_buffer_size(NULL, avctx->channels,
1002 frame->nb_samples,
1003 avctx->sample_fmt, 1);
1004 if ((ret = avcodec_fill_audio_frame(frame, avctx->channels,
1005 avctx->sample_fmt,
1006 samples, samples_size, 1)))
1007 return ret;
1008
1009 /* fabricate frame pts from sample count.
1010 this is needed because the avcodec_encode_audio() API does not have
1011 a way for the user to provide pts */
1012 frame->pts = av_rescale_q(avctx->internal->sample_count,
1013 (AVRational){ 1, avctx->sample_rate },
1014 avctx->time_base);
1015 avctx->internal->sample_count += frame->nb_samples;
1016 } else {
1017 frame = NULL;
1018 }
1019
1020 got_packet = 0;
1021 ret = avcodec_encode_audio2(avctx, &pkt, frame, &got_packet);
1022 if (!ret && got_packet && avctx->coded_frame) {
1023 avctx->coded_frame->pts = pkt.pts;
1024 avctx->coded_frame->key_frame = !!(pkt.flags & AV_PKT_FLAG_KEY);
1025 }
1026 /* free any side data since we cannot return it */
1027 if (pkt.side_data_elems > 0) {
1028 int i;
1029 for (i = 0; i < pkt.side_data_elems; i++)
1030 av_free(pkt.side_data[i].data);
1031 av_freep(&pkt.side_data);
1032 pkt.side_data_elems = 0;
1033 }
1034
1035 if (frame && frame->extended_data != frame->data)
1036 av_free(frame->extended_data);
1037
1038 return ret ? ret : pkt.size;
1039 }
1040 #endif
1041
1042 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1043 const AVFrame *pict)
1044 {
1045 if(buf_size < FF_MIN_BUFFER_SIZE){
1046 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
1047 return -1;
1048 }
1049 if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
1050 return -1;
1051 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
1052 int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
1053 avctx->frame_number++;
1054 emms_c(); //needed to avoid an emms_c() call before every return;
1055
1056 return ret;
1057 }else
1058 return 0;
1059 }
1060
1061 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
1062 const AVSubtitle *sub)
1063 {
1064 int ret;
1065 if(sub->start_display_time) {
1066 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
1067 return -1;
1068 }
1069 if(sub->num_rects == 0 || !sub->rects)
1070 return -1;
1071 ret = avctx->codec->encode(avctx, buf, buf_size, sub);
1072 avctx->frame_number++;
1073 return ret;
1074 }
1075
1076 static void apply_param_change(AVCodecContext *avctx, AVPacket *avpkt)
1077 {
1078 int size = 0;
1079 const uint8_t *data;
1080 uint32_t flags;
1081
1082 if (!(avctx->codec->capabilities & CODEC_CAP_PARAM_CHANGE))
1083 return;
1084
1085 data = av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, &size);
1086 if (!data || size < 4)
1087 return;
1088 flags = bytestream_get_le32(&data);
1089 size -= 4;
1090 if (size < 4) /* Required for any of the changes */
1091 return;
1092 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) {
1093 avctx->channels = bytestream_get_le32(&data);
1094 size -= 4;
1095 }
1096 if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) {
1097 if (size < 8)
1098 return;
1099 avctx->channel_layout = bytestream_get_le64(&data);
1100 size -= 8;
1101 }
1102 if (size < 4)
1103 return;
1104 if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) {
1105 avctx->sample_rate = bytestream_get_le32(&data);
1106 size -= 4;
1107 }
1108 if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) {
1109 if (size < 8)
1110 return;
1111 avctx->width = bytestream_get_le32(&data);
1112 avctx->height = bytestream_get_le32(&data);
1113 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
1114 size -= 8;
1115 }
1116 }
1117
1118 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
1119 int *got_picture_ptr,
1120 AVPacket *avpkt)
1121 {
1122 int ret;
1123
1124 *got_picture_ptr= 0;
1125 if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
1126 return -1;
1127
1128 avctx->pkt = avpkt;
1129 apply_param_change(avctx, avpkt);
1130
1131 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type&FF_THREAD_FRAME)){
1132 if (HAVE_THREADS && avctx->active_thread_type&FF_THREAD_FRAME)
1133 ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
1134 avpkt);
1135 else {
1136 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
1137 avpkt);
1138 picture->pkt_dts= avpkt->dts;
1139 picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
1140 picture->width = avctx->width;
1141 picture->height = avctx->height;
1142 picture->format = avctx->pix_fmt;
1143 }
1144
1145 emms_c(); //needed to avoid an emms_c() call before every return;
1146
1147 if (*got_picture_ptr)
1148 avctx->frame_number++;
1149 }else
1150 ret= 0;
1151
1152 return ret;
1153 }
1154
1155 #if FF_API_OLD_DECODE_AUDIO
1156 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
1157 int *frame_size_ptr,
1158 AVPacket *avpkt)
1159 {
1160 AVFrame frame;
1161 int ret, got_frame = 0;
1162
1163 if (avctx->get_buffer != avcodec_default_get_buffer) {
1164 av_log(avctx, AV_LOG_ERROR, "Custom get_buffer() for use with"
1165 "avcodec_decode_audio3() detected. Overriding with avcodec_default_get_buffer\n");
1166 av_log(avctx, AV_LOG_ERROR, "Please port your application to "
1167 "avcodec_decode_audio4()\n");
1168 avctx->get_buffer = avcodec_default_get_buffer;
1169 }
1170
1171 ret = avcodec_decode_audio4(avctx, &frame, &got_frame, avpkt);
1172
1173 if (ret >= 0 && got_frame) {
1174 int ch, plane_size;
1175 int planar = av_sample_fmt_is_planar(avctx->sample_fmt);
1176 int data_size = av_samples_get_buffer_size(&plane_size, avctx->channels,
1177 frame.nb_samples,
1178 avctx->sample_fmt, 1);
1179 if (*frame_size_ptr < data_size) {
1180 av_log(avctx, AV_LOG_ERROR, "output buffer size is too small for "
1181 "the current frame (%d < %d)\n", *frame_size_ptr, data_size);
1182 return AVERROR(EINVAL);
1183 }
1184
1185 memcpy(samples, frame.extended_data[0], plane_size);
1186
1187 if (planar && avctx->channels > 1) {
1188 uint8_t *out = ((uint8_t *)samples) + plane_size;
1189 for (ch = 1; ch < avctx->channels; ch++) {
1190 memcpy(out, frame.extended_data[ch], plane_size);
1191 out += plane_size;
1192 }
1193 }
1194 *frame_size_ptr = data_size;
1195 } else {
1196 *frame_size_ptr = 0;
1197 }
1198 return ret;
1199 }
1200 #endif
1201
1202 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
1203 AVFrame *frame,
1204 int *got_frame_ptr,
1205 AVPacket *avpkt)
1206 {
1207 int ret = 0;
1208
1209 *got_frame_ptr = 0;
1210
1211 avctx->pkt = avpkt;
1212
1213 if (!avpkt->data && avpkt->size) {
1214 av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
1215 return AVERROR(EINVAL);
1216 }
1217
1218 apply_param_change(avctx, avpkt);
1219
1220 if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
1221 ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt);
1222 if (ret >= 0 && *got_frame_ptr) {
1223 avctx->frame_number++;
1224 frame->pkt_dts = avpkt->dts;
1225 if (frame->format == AV_SAMPLE_FMT_NONE)
1226 frame->format = avctx->sample_fmt;
1227 }
1228 }
1229 return ret;
1230 }
1231
1232 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
1233 int *got_sub_ptr,
1234 AVPacket *avpkt)
1235 {
1236 int ret;
1237
1238 avctx->pkt = avpkt;
1239 *got_sub_ptr = 0;
1240 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
1241 if (*got_sub_ptr)
1242 avctx->frame_number++;
1243 return ret;
1244 }
1245
1246 void avsubtitle_free(AVSubtitle *sub)
1247 {
1248 int i;
1249
1250 for (i = 0; i < sub->num_rects; i++)
1251 {
1252 av_freep(&sub->rects[i]->pict.data[0]);
1253 av_freep(&sub->rects[i]->pict.data[1]);
1254 av_freep(&sub->rects[i]->pict.data[2]);
1255 av_freep(&sub->rects[i]->pict.data[3]);
1256 av_freep(&sub->rects[i]->text);
1257 av_freep(&sub->rects[i]->ass);
1258 av_freep(&sub->rects[i]);
1259 }
1260
1261 av_freep(&sub->rects);
1262
1263 memset(sub, 0, sizeof(AVSubtitle));
1264 }
1265
1266 av_cold int avcodec_close(AVCodecContext *avctx)
1267 {
1268 /* If there is a user-supplied mutex locking routine, call it. */
1269 if (ff_lockmgr_cb) {
1270 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
1271 return -1;
1272 }
1273
1274 entangled_thread_counter++;
1275 if(entangled_thread_counter != 1){
1276 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
1277 entangled_thread_counter--;
1278 return -1;
1279 }
1280
1281 if (HAVE_THREADS && avctx->thread_opaque)
1282 ff_thread_free(avctx);
1283 if (avctx->codec && avctx->codec->close)
1284 avctx->codec->close(avctx);
1285 avcodec_default_free_buffers(avctx);
1286 avctx->coded_frame = NULL;
1287 av_freep(&avctx->internal);
1288 if (avctx->codec && avctx->codec->priv_class)
1289 av_opt_free(avctx->priv_data);
1290 av_opt_free(avctx);
1291 av_freep(&avctx->priv_data);
1292 if (codec_is_encoder(avctx->codec))
1293 av_freep(&avctx->extradata);
1294 avctx->codec = NULL;
1295 avctx->active_thread_type = 0;
1296 entangled_thread_counter--;
1297
1298 /* Release any user-supplied mutex. */
1299 if (ff_lockmgr_cb) {
1300 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1301 }
1302 return 0;
1303 }
1304
1305 AVCodec *avcodec_find_encoder(enum CodecID id)
1306 {
1307 AVCodec *p, *experimental=NULL;
1308 p = first_avcodec;
1309 while (p) {
1310 if (codec_is_encoder(p) && p->id == id) {
1311 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
1312 experimental = p;
1313 } else
1314 return p;
1315 }
1316 p = p->next;
1317 }
1318 return experimental;
1319 }
1320
1321 AVCodec *avcodec_find_encoder_by_name(const char *name)
1322 {
1323 AVCodec *p;
1324 if (!name)
1325 return NULL;
1326 p = first_avcodec;
1327 while (p) {
1328 if (codec_is_encoder(p) && strcmp(name,p->name) == 0)
1329 return p;
1330 p = p->next;
1331 }
1332 return NULL;
1333 }
1334
1335 AVCodec *avcodec_find_decoder(enum CodecID id)
1336 {
1337 AVCodec *p;
1338 p = first_avcodec;
1339 while (p) {
1340 if (codec_is_decoder(p) && p->id == id)
1341 return p;
1342 p = p->next;
1343 }
1344 return NULL;
1345 }
1346
1347 AVCodec *avcodec_find_decoder_by_name(const char *name)
1348 {
1349 AVCodec *p;
1350 if (!name)
1351 return NULL;
1352 p = first_avcodec;
1353 while (p) {
1354 if (codec_is_decoder(p) && strcmp(name,p->name) == 0)
1355 return p;
1356 p = p->next;
1357 }
1358 return NULL;
1359 }
1360
1361 static int get_bit_rate(AVCodecContext *ctx)
1362 {
1363 int bit_rate;
1364 int bits_per_sample;
1365
1366 switch(ctx->codec_type) {
1367 case AVMEDIA_TYPE_VIDEO:
1368 case AVMEDIA_TYPE_DATA:
1369 case AVMEDIA_TYPE_SUBTITLE:
1370 case AVMEDIA_TYPE_ATTACHMENT:
1371 bit_rate = ctx->bit_rate;
1372 break;
1373 case AVMEDIA_TYPE_AUDIO:
1374 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
1375 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
1376 break;
1377 default:
1378 bit_rate = 0;
1379 break;
1380 }
1381 return bit_rate;
1382 }
1383
1384 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
1385 {
1386 int i, len, ret = 0;
1387
1388 for (i = 0; i < 4; i++) {
1389 len = snprintf(buf, buf_size,
1390 isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
1391 buf += len;
1392 buf_size = buf_size > len ? buf_size - len : 0;
1393 ret += len;
1394 codec_tag>>=8;
1395 }
1396 return ret;
1397 }
1398
1399 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1400 {
1401 const char *codec_name;
1402 const char *profile = NULL;
1403 AVCodec *p;
1404 char buf1[32];
1405 int bitrate;
1406 AVRational display_aspect_ratio;
1407
1408 if (encode)
1409 p = avcodec_find_encoder(enc->codec_id);
1410 else
1411 p = avcodec_find_decoder(enc->codec_id);
1412
1413 if (p) {
1414 codec_name = p->name;
1415 profile = av_get_profile_name(p, enc->profile);
1416 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
1417 /* fake mpeg2 transport stream codec (currently not
1418 registered) */
1419 codec_name = "mpeg2ts";
1420 } else if (enc->codec_name[0] != '\0') {
1421 codec_name = enc->codec_name;
1422 } else {
1423 /* output avi tags */
1424 char tag_buf[32];
1425 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1426 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
1427 codec_name = buf1;
1428 }
1429
1430 switch(enc->codec_type) {
1431 case AVMEDIA_TYPE_VIDEO:
1432 snprintf(buf, buf_size,
1433 "Video: %s%s",
1434 codec_name, enc->mb_decision ? " (hq)" : "");
1435 if (profile)
1436 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1437 " (%s)", profile);
1438 if (enc->pix_fmt != PIX_FMT_NONE) {
1439 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1440 ", %s",
1441 av_get_pix_fmt_name(enc->pix_fmt));
1442 }
1443 if (enc->width) {
1444 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1445 ", %dx%d",
1446 enc->width, enc->height);
1447 if (enc->sample_aspect_ratio.num) {
1448 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1449 enc->width*enc->sample_aspect_ratio.num,
1450 enc->height*enc->sample_aspect_ratio.den,
1451 1024*1024);
1452 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1453 " [PAR %d:%d DAR %d:%d]",
1454 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1455 display_aspect_ratio.num, display_aspect_ratio.den);
1456 }
1457 if(av_log_get_level() >= AV_LOG_DEBUG){
1458 int g= av_gcd(enc->time_base.num, enc->time_base.den);
1459 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1460 ", %d/%d",
1461 enc->time_base.num/g, enc->time_base.den/g);
1462 }
1463 }
1464 if (encode) {
1465 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1466 ", q=%d-%d", enc->qmin, enc->qmax);
1467 }
1468 break;
1469 case AVMEDIA_TYPE_AUDIO:
1470 snprintf(buf, buf_size,
1471 "Audio: %s",
1472 codec_name);
1473 if (profile)
1474 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1475 " (%s)", profile);
1476 if (enc->sample_rate) {
1477 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1478 ", %d Hz", enc->sample_rate);
1479 }
1480 av_strlcat(buf, ", ", buf_size);
1481 av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
1482 if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
1483 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1484 ", %s", av_get_sample_fmt_name(enc->sample_fmt));
1485 }
1486 break;
1487 case AVMEDIA_TYPE_DATA:
1488 snprintf(buf, buf_size, "Data: %s", codec_name);
1489 break;
1490 case AVMEDIA_TYPE_SUBTITLE:
1491 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1492 break;
1493 case AVMEDIA_TYPE_ATTACHMENT:
1494 snprintf(buf, buf_size, "Attachment: %s", codec_name);
1495 break;
1496 default:
1497 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1498 return;
1499 }
1500 if (encode) {
1501 if (enc->flags & CODEC_FLAG_PASS1)
1502 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1503 ", pass 1");
1504 if (enc->flags & CODEC_FLAG_PASS2)
1505 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1506 ", pass 2");
1507 }
1508 bitrate = get_bit_rate(enc);
1509 if (bitrate != 0) {
1510 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1511 ", %d kb/s", bitrate / 1000);
1512 }
1513 }
1514
1515 const char *av_get_profile_name(const AVCodec *codec, int profile)
1516 {
1517 const AVProfile *p;
1518 if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1519 return NULL;
1520
1521 for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1522 if (p->profile == profile)
1523 return p->name;
1524
1525 return NULL;
1526 }
1527
1528 unsigned avcodec_version( void )
1529 {
1530 return LIBAVCODEC_VERSION_INT;
1531 }
1532
1533 const char *avcodec_configuration(void)
1534 {
1535 return LIBAV_CONFIGURATION;
1536 }
1537
1538 const char *avcodec_license(void)
1539 {
1540 #define LICENSE_PREFIX "libavcodec license: "
1541 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1542 }
1543
1544 void avcodec_flush_buffers(AVCodecContext *avctx)
1545 {
1546 if(HAVE_THREADS && avctx->active_thread_type&FF_THREAD_FRAME)
1547 ff_thread_flush(avctx);
1548 else if(avctx->codec->flush)
1549 avctx->codec->flush(avctx);
1550 }
1551
1552 static void video_free_buffers(AVCodecContext *s)
1553 {
1554 AVCodecInternal *avci = s->internal;
1555 int i, j;
1556
1557 if (!avci->buffer)
1558 return;
1559
1560 if (avci->buffer_count)
1561 av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n",
1562 avci->buffer_count);
1563 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
1564 InternalBuffer *buf = &avci->buffer[i];
1565 for(j=0; j<4; j++){
1566 av_freep(&buf->base[j]);
1567 buf->data[j]= NULL;
1568 }
1569 }
1570 av_freep(&avci->buffer);
1571
1572 avci->buffer_count=0;
1573 }
1574
1575 static void audio_free_buffers(AVCodecContext *avctx)
1576 {
1577 AVCodecInternal *avci = avctx->internal;
1578 InternalBuffer *buf;
1579
1580 if (!avci->buffer)
1581 return;
1582 buf = avci->buffer;
1583
1584 if (buf->extended_data) {
1585 av_free(buf->extended_data[0]);
1586 if (buf->extended_data != buf->data)
1587 av_free(buf->extended_data);
1588 }
1589 av_freep(&avci->buffer);
1590 }
1591
1592 void avcodec_default_free_buffers(AVCodecContext *avctx)
1593 {
1594 switch (avctx->codec_type) {
1595 case AVMEDIA_TYPE_VIDEO:
1596 video_free_buffers(avctx);
1597 break;
1598 case AVMEDIA_TYPE_AUDIO:
1599 audio_free_buffers(avctx);
1600 break;
1601 default:
1602 break;
1603 }
1604 }
1605
1606 #if FF_API_OLD_FF_PICT_TYPES
1607 char av_get_pict_type_char(int pict_type){
1608 return av_get_picture_type_char(pict_type);
1609 }
1610 #endif
1611
1612 int av_get_bits_per_sample(enum CodecID codec_id){
1613 switch(codec_id){
1614 case CODEC_ID_ADPCM_SBPRO_2:
1615 return 2;
1616 case CODEC_ID_ADPCM_SBPRO_3:
1617 return 3;
1618 case CODEC_ID_ADPCM_SBPRO_4:
1619 case CODEC_ID_ADPCM_CT:
1620 case CODEC_ID_ADPCM_IMA_APC:
1621 case CODEC_ID_ADPCM_IMA_WAV:
1622 case CODEC_ID_ADPCM_IMA_QT:
1623 case CODEC_ID_ADPCM_SWF:
1624 case CODEC_ID_ADPCM_MS:
1625 case CODEC_ID_ADPCM_YAMAHA:
1626 case CODEC_ID_ADPCM_G722:
1627 return 4;
1628 case CODEC_ID_PCM_ALAW:
1629 case CODEC_ID_PCM_MULAW:
1630 case CODEC_ID_PCM_S8:
1631 case CODEC_ID_PCM_U8:
1632 case CODEC_ID_PCM_ZORK:
1633 return 8;
1634 case CODEC_ID_PCM_S16BE:
1635 case CODEC_ID_PCM_S16LE:
1636 case CODEC_ID_PCM_S16LE_PLANAR:
1637 case CODEC_ID_PCM_U16BE:
1638 case CODEC_ID_PCM_U16LE:
1639 return 16;
1640 case CODEC_ID_PCM_S24DAUD:
1641 case CODEC_ID_PCM_S24BE:
1642 case CODEC_ID_PCM_S24LE:
1643 case CODEC_ID_PCM_U24BE:
1644 case CODEC_ID_PCM_U24LE:
1645 return 24;
1646 case CODEC_ID_PCM_S32BE:
1647 case CODEC_ID_PCM_S32LE:
1648 case CODEC_ID_PCM_U32BE:
1649 case CODEC_ID_PCM_U32LE:
1650 case CODEC_ID_PCM_F32BE:
1651 case CODEC_ID_PCM_F32LE:
1652 return 32;
1653 case CODEC_ID_PCM_F64BE:
1654 case CODEC_ID_PCM_F64LE:
1655 return 64;
1656 default:
1657 return 0;
1658 }
1659 }
1660
1661 #if FF_API_OLD_SAMPLE_FMT
1662 int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt) {
1663 return av_get_bytes_per_sample(sample_fmt) << 3;
1664 }
1665 #endif
1666
1667 #if !HAVE_THREADS
1668 int ff_thread_init(AVCodecContext *s){
1669 return -1;
1670 }
1671 #endif
1672
1673 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1674 {
1675 unsigned int n = 0;
1676
1677 while(v >= 0xff) {
1678 *s++ = 0xff;
1679 v -= 0xff;
1680 n++;
1681 }
1682 *s = v;
1683 n++;
1684 return n;
1685 }
1686
1687 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1688 int i;
1689 for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1690 return i;
1691 }
1692
1693 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1694 {
1695 av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your Libav "
1696 "version to the newest one from Git. If the problem still "
1697 "occurs, it means that your file has a feature which has not "
1698 "been implemented.\n", feature);
1699 if(want_sample)
1700 av_log_ask_for_sample(avc, NULL);
1701 }
1702
1703 void av_log_ask_for_sample(void *avc, const char *msg, ...)
1704 {
1705 va_list argument_list;
1706
1707 va_start(argument_list, msg);
1708
1709 if (msg)
1710 av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
1711 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1712 "of this file to ftp://upload.libav.org/incoming/ "
1713 "and contact the libav-devel mailing list.\n");
1714
1715 va_end(argument_list);
1716 }
1717
1718 static AVHWAccel *first_hwaccel = NULL;
1719
1720 void av_register_hwaccel(AVHWAccel *hwaccel)
1721 {
1722 AVHWAccel **p = &first_hwaccel;
1723 while (*p)
1724 p = &(*p)->next;
1725 *p = hwaccel;
1726 hwaccel->next = NULL;
1727 }
1728
1729 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1730 {
1731 return hwaccel ? hwaccel->next : first_hwaccel;
1732 }
1733
1734 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1735 {
1736 AVHWAccel *hwaccel=NULL;
1737
1738 while((hwaccel= av_hwaccel_next(hwaccel))){
1739 if ( hwaccel->id == codec_id
1740 && hwaccel->pix_fmt == pix_fmt)
1741 return hwaccel;
1742 }
1743 return NULL;
1744 }
1745
1746 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1747 {
1748 if (ff_lockmgr_cb) {
1749 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1750 return -1;
1751 if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
1752 return -1;
1753 }
1754
1755 ff_lockmgr_cb = cb;
1756
1757 if (ff_lockmgr_cb) {
1758 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1759 return -1;
1760 if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
1761 return -1;
1762 }
1763 return 0;
1764 }
1765
1766 int avpriv_lock_avformat(void)
1767 {
1768 if (ff_lockmgr_cb) {
1769 if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
1770 return -1;
1771 }
1772 return 0;
1773 }
1774
1775 int avpriv_unlock_avformat(void)
1776 {
1777 if (ff_lockmgr_cb) {
1778 if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
1779 return -1;
1780 }
1781 return 0;
1782 }
1783
1784 unsigned int avpriv_toupper4(unsigned int x)
1785 {
1786 return toupper( x &0xFF)
1787 + (toupper((x>>8 )&0xFF)<<8 )
1788 + (toupper((x>>16)&0xFF)<<16)
1789 + (toupper((x>>24)&0xFF)<<24);
1790 }
1791
1792 #if !HAVE_THREADS
1793
1794 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
1795 {
1796 f->owner = avctx;
1797 return avctx->get_buffer(avctx, f);
1798 }
1799
1800 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
1801 {
1802 f->owner->release_buffer(f->owner, f);
1803 }
1804
1805 void ff_thread_finish_setup(AVCodecContext *avctx)
1806 {
1807 }
1808
1809 void ff_thread_report_progress(AVFrame *f, int progress, int field)
1810 {
1811 }
1812
1813 void ff_thread_await_progress(AVFrame *f, int progress, int field)
1814 {
1815 }
1816
1817 #endif
1818
1819 #if FF_API_THREAD_INIT
1820 int avcodec_thread_init(AVCodecContext *s, int thread_count)
1821 {
1822 s->thread_count = thread_count;
1823 return ff_thread_init(s);
1824 }
1825 #endif
1826
1827 enum AVMediaType avcodec_get_type(enum CodecID codec_id)
1828 {
1829 if (codec_id <= CODEC_ID_NONE)
1830 return AVMEDIA_TYPE_UNKNOWN;
1831 else if (codec_id < CODEC_ID_FIRST_AUDIO)
1832 return AVMEDIA_TYPE_VIDEO;
1833 else if (codec_id < CODEC_ID_FIRST_SUBTITLE)
1834 return AVMEDIA_TYPE_AUDIO;
1835 else if (codec_id < CODEC_ID_FIRST_UNKNOWN)
1836 return AVMEDIA_TYPE_SUBTITLE;
1837
1838 return AVMEDIA_TYPE_UNKNOWN;
1839 }