ad80f0f4a30ffc5b384e3898157efdcad3da4b10
[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/imgutils.h"
33 #include "avcodec.h"
34 #include "dsputil.h"
35 #include "libavutil/opt.h"
36 #include "imgconvert.h"
37 #include "audioconvert.h"
38 #include "internal.h"
39 #include <stdlib.h>
40 #include <stdarg.h>
41 #include <limits.h>
42 #include <float.h>
43
44 static int volatile entangled_thread_counter=0;
45 int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
46 static void *codec_mutex;
47
48 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
49 {
50 if(min_size < *size)
51 return ptr;
52
53 *size= FFMAX(17*min_size/16 + 32, min_size);
54
55 ptr= av_realloc(ptr, *size);
56 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
57 *size= 0;
58
59 return ptr;
60 }
61
62 void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
63 {
64 void **p = ptr;
65 if (min_size < *size)
66 return;
67 *size= FFMAX(17*min_size/16 + 32, min_size);
68 av_free(*p);
69 *p = av_malloc(*size);
70 if (!*p) *size = 0;
71 }
72
73 /* encoder management */
74 static AVCodec *first_avcodec = NULL;
75
76 AVCodec *av_codec_next(AVCodec *c){
77 if(c) return c->next;
78 else return first_avcodec;
79 }
80
81 void avcodec_register(AVCodec *codec)
82 {
83 AVCodec **p;
84 avcodec_init();
85 p = &first_avcodec;
86 while (*p != NULL) p = &(*p)->next;
87 *p = codec;
88 codec->next = NULL;
89 }
90
91 #if LIBAVCODEC_VERSION_MAJOR < 53
92 void register_avcodec(AVCodec *codec)
93 {
94 avcodec_register(codec);
95 }
96 #endif
97
98 unsigned avcodec_get_edge_width(void)
99 {
100 return EDGE_WIDTH;
101 }
102
103 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
104 s->coded_width = width;
105 s->coded_height= height;
106 s->width = -((-width )>>s->lowres);
107 s->height= -((-height)>>s->lowres);
108 }
109
110 typedef struct InternalBuffer{
111 int last_pic_num;
112 uint8_t *base[4];
113 uint8_t *data[4];
114 int linesize[4];
115 int width, height;
116 enum PixelFormat pix_fmt;
117 }InternalBuffer;
118
119 #define INTERNAL_BUFFER_SIZE 32
120
121 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
122 int w_align= 1;
123 int h_align= 1;
124
125 switch(s->pix_fmt){
126 case PIX_FMT_YUV420P:
127 case PIX_FMT_YUYV422:
128 case PIX_FMT_UYVY422:
129 case PIX_FMT_YUV422P:
130 case PIX_FMT_YUV440P:
131 case PIX_FMT_YUV444P:
132 case PIX_FMT_GRAY8:
133 case PIX_FMT_GRAY16BE:
134 case PIX_FMT_GRAY16LE:
135 case PIX_FMT_YUVJ420P:
136 case PIX_FMT_YUVJ422P:
137 case PIX_FMT_YUVJ440P:
138 case PIX_FMT_YUVJ444P:
139 case PIX_FMT_YUVA420P:
140 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
141 h_align= 16;
142 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)
143 h_align= 32; // interlaced is rounded up to 2 MBs
144 break;
145 case PIX_FMT_YUV411P:
146 case PIX_FMT_UYYVYY411:
147 w_align=32;
148 h_align=8;
149 break;
150 case PIX_FMT_YUV410P:
151 if(s->codec_id == CODEC_ID_SVQ1){
152 w_align=64;
153 h_align=64;
154 }
155 case PIX_FMT_RGB555:
156 if(s->codec_id == CODEC_ID_RPZA){
157 w_align=4;
158 h_align=4;
159 }
160 case PIX_FMT_PAL8:
161 case PIX_FMT_BGR8:
162 case PIX_FMT_RGB8:
163 if(s->codec_id == CODEC_ID_SMC){
164 w_align=4;
165 h_align=4;
166 }
167 break;
168 case PIX_FMT_BGR24:
169 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
170 w_align=4;
171 h_align=4;
172 }
173 break;
174 default:
175 w_align= 1;
176 h_align= 1;
177 break;
178 }
179
180 *width = FFALIGN(*width , w_align);
181 *height= FFALIGN(*height, h_align);
182 if(s->codec_id == CODEC_ID_H264)
183 *height+=2; // some of the optimized chroma MC reads one line too much
184
185 linesize_align[0] =
186 linesize_align[1] =
187 linesize_align[2] =
188 linesize_align[3] = STRIDE_ALIGN;
189 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
190 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
191 //picture size unneccessarily in some cases. The solution here is not
192 //pretty and better ideas are welcome!
193 #if HAVE_MMX
194 if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
195 s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
196 s->codec_id == CODEC_ID_VP6A) {
197 linesize_align[0] =
198 linesize_align[1] =
199 linesize_align[2] = 16;
200 }
201 #endif
202 }
203
204 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
205 int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
206 int linesize_align[4];
207 int align;
208 avcodec_align_dimensions2(s, width, height, linesize_align);
209 align = FFMAX(linesize_align[0], linesize_align[3]);
210 linesize_align[1] <<= chroma_shift;
211 linesize_align[2] <<= chroma_shift;
212 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
213 *width=FFALIGN(*width, align);
214 }
215
216 #if LIBAVCODEC_VERSION_MAJOR < 53
217 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
218 return av_image_check_size(w, h, 0, av_log_ctx);
219 }
220 #endif
221
222 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
223 int i;
224 int w= s->width;
225 int h= s->height;
226 InternalBuffer *buf;
227 int *picture_number;
228
229 if(pic->data[0]!=NULL) {
230 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
231 return -1;
232 }
233 if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
234 av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
235 return -1;
236 }
237
238 if(av_image_check_size(w, h, 0, s))
239 return -1;
240
241 if(s->internal_buffer==NULL){
242 s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
243 }
244 #if 0
245 s->internal_buffer= av_fast_realloc(
246 s->internal_buffer,
247 &s->internal_buffer_size,
248 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
249 );
250 #endif
251
252 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
253 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
254 (*picture_number)++;
255
256 if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
257 for(i=0; i<4; i++){
258 av_freep(&buf->base[i]);
259 buf->data[i]= NULL;
260 }
261 }
262
263 if(buf->base[0]){
264 pic->age= *picture_number - buf->last_pic_num;
265 buf->last_pic_num= *picture_number;
266 }else{
267 int h_chroma_shift, v_chroma_shift;
268 int size[4] = {0};
269 int tmpsize;
270 int unaligned;
271 AVPicture picture;
272 int stride_align[4];
273
274 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
275
276 avcodec_align_dimensions2(s, &w, &h, stride_align);
277
278 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
279 w+= EDGE_WIDTH*2;
280 h+= EDGE_WIDTH*2;
281 }
282
283 do {
284 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
285 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
286 av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
287 // increase alignment of w for next try (rhs gives the lowest bit set in w)
288 w += w & ~(w-1);
289
290 unaligned = 0;
291 for (i=0; i<4; i++){
292 unaligned |= picture.linesize[i] % stride_align[i];
293 }
294 } while (unaligned);
295
296 tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
297 if (tmpsize < 0)
298 return -1;
299
300 for (i=0; i<3 && picture.data[i+1]; i++)
301 size[i] = picture.data[i+1] - picture.data[i];
302 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
303
304 buf->last_pic_num= -256*256*256*64;
305 memset(buf->base, 0, sizeof(buf->base));
306 memset(buf->data, 0, sizeof(buf->data));
307
308 for(i=0; i<4 && size[i]; i++){
309 const int h_shift= i==0 ? 0 : h_chroma_shift;
310 const int v_shift= i==0 ? 0 : v_chroma_shift;
311
312 buf->linesize[i]= picture.linesize[i];
313
314 buf->base[i]= av_malloc(size[i]+16); //FIXME 16
315 if(buf->base[i]==NULL) return -1;
316 memset(buf->base[i], 128, size[i]);
317
318 // no edge if EDGE EMU or not planar YUV
319 if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
320 buf->data[i] = buf->base[i];
321 else
322 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
323 }
324 if(size[1] && !size[2])
325 ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
326 buf->width = s->width;
327 buf->height = s->height;
328 buf->pix_fmt= s->pix_fmt;
329 pic->age= 256*256*256*64;
330 }
331 pic->type= FF_BUFFER_TYPE_INTERNAL;
332
333 for(i=0; i<4; i++){
334 pic->base[i]= buf->base[i];
335 pic->data[i]= buf->data[i];
336 pic->linesize[i]= buf->linesize[i];
337 }
338 s->internal_buffer_count++;
339
340 pic->reordered_opaque= s->reordered_opaque;
341
342 if(s->debug&FF_DEBUG_BUFFERS)
343 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
344
345 return 0;
346 }
347
348 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
349 int i;
350 InternalBuffer *buf, *last;
351
352 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
353 assert(s->internal_buffer_count);
354
355 buf = NULL; /* avoids warning */
356 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
357 buf= &((InternalBuffer*)s->internal_buffer)[i];
358 if(buf->data[0] == pic->data[0])
359 break;
360 }
361 assert(i < s->internal_buffer_count);
362 s->internal_buffer_count--;
363 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
364
365 FFSWAP(InternalBuffer, *buf, *last);
366
367 for(i=0; i<4; i++){
368 pic->data[i]=NULL;
369 // pic->base[i]=NULL;
370 }
371 //printf("R%X\n", pic->opaque);
372
373 if(s->debug&FF_DEBUG_BUFFERS)
374 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
375 }
376
377 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
378 AVFrame temp_pic;
379 int i;
380
381 /* If no picture return a new buffer */
382 if(pic->data[0] == NULL) {
383 /* We will copy from buffer, so must be readable */
384 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
385 return s->get_buffer(s, pic);
386 }
387
388 /* If internal buffer type return the same buffer */
389 if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
390 pic->reordered_opaque= s->reordered_opaque;
391 return 0;
392 }
393
394 /*
395 * Not internal type and reget_buffer not overridden, emulate cr buffer
396 */
397 temp_pic = *pic;
398 for(i = 0; i < 4; i++)
399 pic->data[i] = pic->base[i] = NULL;
400 pic->opaque = NULL;
401 /* Allocate new frame */
402 if (s->get_buffer(s, pic))
403 return -1;
404 /* Copy image data from old buffer to new buffer */
405 av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
406 s->height);
407 s->release_buffer(s, &temp_pic); // Release old frame
408 return 0;
409 }
410
411 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
412 int i;
413
414 for(i=0; i<count; i++){
415 int r= func(c, (char*)arg + i*size);
416 if(ret) ret[i]= r;
417 }
418 return 0;
419 }
420
421 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
422 int i;
423
424 for(i=0; i<count; i++){
425 int r= func(c, arg, i, 0);
426 if(ret) ret[i]= r;
427 }
428 return 0;
429 }
430
431 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
432 while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
433 ++fmt;
434 return fmt[0];
435 }
436
437 void avcodec_get_frame_defaults(AVFrame *pic){
438 memset(pic, 0, sizeof(AVFrame));
439
440 pic->pts= AV_NOPTS_VALUE;
441 pic->key_frame= 1;
442 }
443
444 AVFrame *avcodec_alloc_frame(void){
445 AVFrame *pic= av_malloc(sizeof(AVFrame));
446
447 if(pic==NULL) return NULL;
448
449 avcodec_get_frame_defaults(pic);
450
451 return pic;
452 }
453
454 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
455 {
456 int ret= -1;
457
458 /* If there is a user-supplied mutex locking routine, call it. */
459 if (ff_lockmgr_cb) {
460 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
461 return -1;
462 }
463
464 entangled_thread_counter++;
465 if(entangled_thread_counter != 1){
466 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
467 goto end;
468 }
469
470 if(avctx->codec || !codec)
471 goto end;
472
473 if (codec->priv_data_size > 0) {
474 avctx->priv_data = av_mallocz(codec->priv_data_size);
475 if (!avctx->priv_data) {
476 ret = AVERROR(ENOMEM);
477 goto end;
478 }
479 } else {
480 avctx->priv_data = NULL;
481 }
482
483 if(avctx->coded_width && avctx->coded_height)
484 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
485 else if(avctx->width && avctx->height)
486 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
487
488 if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
489 && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
490 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) {
491 av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
492 avcodec_set_dimensions(avctx, 0, 0);
493 }
494
495 #define SANE_NB_CHANNELS 128U
496 if (avctx->channels > SANE_NB_CHANNELS) {
497 ret = AVERROR(EINVAL);
498 goto free_and_end;
499 }
500
501 avctx->codec = codec;
502 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
503 avctx->codec_id == CODEC_ID_NONE) {
504 avctx->codec_type = codec->type;
505 avctx->codec_id = codec->id;
506 }
507 if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
508 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
509 goto free_and_end;
510 }
511 avctx->frame_number = 0;
512 if (avctx->codec->max_lowres < avctx->lowres) {
513 av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
514 avctx->codec->max_lowres);
515 goto free_and_end;
516 }
517
518 if(avctx->codec->init){
519 ret = avctx->codec->init(avctx);
520 if (ret < 0) {
521 goto free_and_end;
522 }
523 }
524 ret=0;
525 end:
526 entangled_thread_counter--;
527
528 /* Release any user-supplied mutex. */
529 if (ff_lockmgr_cb) {
530 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
531 }
532 return ret;
533 free_and_end:
534 av_freep(&avctx->priv_data);
535 avctx->codec= NULL;
536 goto end;
537 }
538
539 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
540 const short *samples)
541 {
542 if(buf_size < FF_MIN_BUFFER_SIZE && 0){
543 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
544 return -1;
545 }
546 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
547 int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
548 avctx->frame_number++;
549 return ret;
550 }else
551 return 0;
552 }
553
554 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
555 const AVFrame *pict)
556 {
557 if(buf_size < FF_MIN_BUFFER_SIZE){
558 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
559 return -1;
560 }
561 if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
562 return -1;
563 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
564 int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
565 avctx->frame_number++;
566 emms_c(); //needed to avoid an emms_c() call before every return;
567
568 return ret;
569 }else
570 return 0;
571 }
572
573 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
574 const AVSubtitle *sub)
575 {
576 int ret;
577 if(sub->start_display_time) {
578 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
579 return -1;
580 }
581 if(sub->num_rects == 0 || !sub->rects)
582 return -1;
583 ret = avctx->codec->encode(avctx, buf, buf_size, sub);
584 avctx->frame_number++;
585 return ret;
586 }
587
588 #if LIBAVCODEC_VERSION_MAJOR < 53
589 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
590 int *got_picture_ptr,
591 const uint8_t *buf, int buf_size)
592 {
593 AVPacket avpkt;
594 av_init_packet(&avpkt);
595 avpkt.data = buf;
596 avpkt.size = buf_size;
597 // HACK for CorePNG to decode as normal PNG by default
598 avpkt.flags = AV_PKT_FLAG_KEY;
599
600 return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
601 }
602 #endif
603
604 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
605 int *got_picture_ptr,
606 AVPacket *avpkt)
607 {
608 int ret;
609
610 *got_picture_ptr= 0;
611 if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
612 return -1;
613 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
614 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
615 avpkt);
616
617 emms_c(); //needed to avoid an emms_c() call before every return;
618
619 if (*got_picture_ptr)
620 avctx->frame_number++;
621 }else
622 ret= 0;
623
624 return ret;
625 }
626
627 #if LIBAVCODEC_VERSION_MAJOR < 53
628 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
629 int *frame_size_ptr,
630 const uint8_t *buf, int buf_size)
631 {
632 AVPacket avpkt;
633 av_init_packet(&avpkt);
634 avpkt.data = buf;
635 avpkt.size = buf_size;
636
637 return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
638 }
639 #endif
640
641 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
642 int *frame_size_ptr,
643 AVPacket *avpkt)
644 {
645 int ret;
646
647 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
648 //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
649 if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
650 av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
651 return -1;
652 }
653 if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
654 *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
655 av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
656 return -1;
657 }
658
659 ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
660 avctx->frame_number++;
661 }else{
662 ret= 0;
663 *frame_size_ptr=0;
664 }
665 return ret;
666 }
667
668 #if LIBAVCODEC_VERSION_MAJOR < 53
669 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
670 int *got_sub_ptr,
671 const uint8_t *buf, int buf_size)
672 {
673 AVPacket avpkt;
674 av_init_packet(&avpkt);
675 avpkt.data = buf;
676 avpkt.size = buf_size;
677
678 return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
679 }
680 #endif
681
682 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
683 int *got_sub_ptr,
684 AVPacket *avpkt)
685 {
686 int ret;
687
688 *got_sub_ptr = 0;
689 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
690 if (*got_sub_ptr)
691 avctx->frame_number++;
692 return ret;
693 }
694
695 void avsubtitle_free(AVSubtitle *sub)
696 {
697 int i;
698
699 for (i = 0; i < sub->num_rects; i++)
700 {
701 av_freep(&sub->rects[i]->pict.data[0]);
702 av_freep(&sub->rects[i]->pict.data[1]);
703 av_freep(&sub->rects[i]->pict.data[2]);
704 av_freep(&sub->rects[i]->pict.data[3]);
705 av_freep(&sub->rects[i]->text);
706 av_freep(&sub->rects[i]->ass);
707 av_freep(&sub->rects[i]);
708 }
709
710 av_freep(&sub->rects);
711
712 memset(sub, 0, sizeof(AVSubtitle));
713 }
714
715 av_cold int avcodec_close(AVCodecContext *avctx)
716 {
717 /* If there is a user-supplied mutex locking routine, call it. */
718 if (ff_lockmgr_cb) {
719 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
720 return -1;
721 }
722
723 entangled_thread_counter++;
724 if(entangled_thread_counter != 1){
725 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
726 entangled_thread_counter--;
727 return -1;
728 }
729
730 if (HAVE_THREADS && avctx->thread_opaque)
731 avcodec_thread_free(avctx);
732 if (avctx->codec && avctx->codec->close)
733 avctx->codec->close(avctx);
734 avcodec_default_free_buffers(avctx);
735 avctx->coded_frame = NULL;
736 av_freep(&avctx->priv_data);
737 if(avctx->codec && avctx->codec->encode)
738 av_freep(&avctx->extradata);
739 avctx->codec = NULL;
740 entangled_thread_counter--;
741
742 /* Release any user-supplied mutex. */
743 if (ff_lockmgr_cb) {
744 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
745 }
746 return 0;
747 }
748
749 AVCodec *avcodec_find_encoder(enum CodecID id)
750 {
751 AVCodec *p, *experimental=NULL;
752 p = first_avcodec;
753 while (p) {
754 if (p->encode != NULL && p->id == id) {
755 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
756 experimental = p;
757 } else
758 return p;
759 }
760 p = p->next;
761 }
762 return experimental;
763 }
764
765 AVCodec *avcodec_find_encoder_by_name(const char *name)
766 {
767 AVCodec *p;
768 if (!name)
769 return NULL;
770 p = first_avcodec;
771 while (p) {
772 if (p->encode != NULL && strcmp(name,p->name) == 0)
773 return p;
774 p = p->next;
775 }
776 return NULL;
777 }
778
779 AVCodec *avcodec_find_decoder(enum CodecID id)
780 {
781 AVCodec *p;
782 p = first_avcodec;
783 while (p) {
784 if (p->decode != NULL && p->id == id)
785 return p;
786 p = p->next;
787 }
788 return NULL;
789 }
790
791 AVCodec *avcodec_find_decoder_by_name(const char *name)
792 {
793 AVCodec *p;
794 if (!name)
795 return NULL;
796 p = first_avcodec;
797 while (p) {
798 if (p->decode != NULL && strcmp(name,p->name) == 0)
799 return p;
800 p = p->next;
801 }
802 return NULL;
803 }
804
805 static int get_bit_rate(AVCodecContext *ctx)
806 {
807 int bit_rate;
808 int bits_per_sample;
809
810 switch(ctx->codec_type) {
811 case AVMEDIA_TYPE_VIDEO:
812 case AVMEDIA_TYPE_DATA:
813 case AVMEDIA_TYPE_SUBTITLE:
814 case AVMEDIA_TYPE_ATTACHMENT:
815 bit_rate = ctx->bit_rate;
816 break;
817 case AVMEDIA_TYPE_AUDIO:
818 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
819 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
820 break;
821 default:
822 bit_rate = 0;
823 break;
824 }
825 return bit_rate;
826 }
827
828 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
829 {
830 int i, len, ret = 0;
831
832 for (i = 0; i < 4; i++) {
833 len = snprintf(buf, buf_size,
834 isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
835 buf += len;
836 buf_size = buf_size > len ? buf_size - len : 0;
837 ret += len;
838 codec_tag>>=8;
839 }
840 return ret;
841 }
842
843 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
844 {
845 const char *codec_name;
846 AVCodec *p;
847 char buf1[32];
848 int bitrate;
849 AVRational display_aspect_ratio;
850
851 if (encode)
852 p = avcodec_find_encoder(enc->codec_id);
853 else
854 p = avcodec_find_decoder(enc->codec_id);
855
856 if (p) {
857 codec_name = p->name;
858 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
859 /* fake mpeg2 transport stream codec (currently not
860 registered) */
861 codec_name = "mpeg2ts";
862 } else if (enc->codec_name[0] != '\0') {
863 codec_name = enc->codec_name;
864 } else {
865 /* output avi tags */
866 char tag_buf[32];
867 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
868 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
869 codec_name = buf1;
870 }
871
872 switch(enc->codec_type) {
873 case AVMEDIA_TYPE_VIDEO:
874 snprintf(buf, buf_size,
875 "Video: %s%s",
876 codec_name, enc->mb_decision ? " (hq)" : "");
877 if (enc->pix_fmt != PIX_FMT_NONE) {
878 snprintf(buf + strlen(buf), buf_size - strlen(buf),
879 ", %s",
880 avcodec_get_pix_fmt_name(enc->pix_fmt));
881 }
882 if (enc->width) {
883 snprintf(buf + strlen(buf), buf_size - strlen(buf),
884 ", %dx%d",
885 enc->width, enc->height);
886 if (enc->sample_aspect_ratio.num) {
887 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
888 enc->width*enc->sample_aspect_ratio.num,
889 enc->height*enc->sample_aspect_ratio.den,
890 1024*1024);
891 snprintf(buf + strlen(buf), buf_size - strlen(buf),
892 " [PAR %d:%d DAR %d:%d]",
893 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
894 display_aspect_ratio.num, display_aspect_ratio.den);
895 }
896 if(av_log_get_level() >= AV_LOG_DEBUG){
897 int g= av_gcd(enc->time_base.num, enc->time_base.den);
898 snprintf(buf + strlen(buf), buf_size - strlen(buf),
899 ", %d/%d",
900 enc->time_base.num/g, enc->time_base.den/g);
901 }
902 }
903 if (encode) {
904 snprintf(buf + strlen(buf), buf_size - strlen(buf),
905 ", q=%d-%d", enc->qmin, enc->qmax);
906 }
907 break;
908 case AVMEDIA_TYPE_AUDIO:
909 snprintf(buf, buf_size,
910 "Audio: %s",
911 codec_name);
912 if (enc->sample_rate) {
913 snprintf(buf + strlen(buf), buf_size - strlen(buf),
914 ", %d Hz", enc->sample_rate);
915 }
916 av_strlcat(buf, ", ", buf_size);
917 avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
918 if (enc->sample_fmt != SAMPLE_FMT_NONE) {
919 snprintf(buf + strlen(buf), buf_size - strlen(buf),
920 ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
921 }
922 break;
923 case AVMEDIA_TYPE_DATA:
924 snprintf(buf, buf_size, "Data: %s", codec_name);
925 break;
926 case AVMEDIA_TYPE_SUBTITLE:
927 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
928 break;
929 case AVMEDIA_TYPE_ATTACHMENT:
930 snprintf(buf, buf_size, "Attachment: %s", codec_name);
931 break;
932 default:
933 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
934 return;
935 }
936 if (encode) {
937 if (enc->flags & CODEC_FLAG_PASS1)
938 snprintf(buf + strlen(buf), buf_size - strlen(buf),
939 ", pass 1");
940 if (enc->flags & CODEC_FLAG_PASS2)
941 snprintf(buf + strlen(buf), buf_size - strlen(buf),
942 ", pass 2");
943 }
944 bitrate = get_bit_rate(enc);
945 if (bitrate != 0) {
946 snprintf(buf + strlen(buf), buf_size - strlen(buf),
947 ", %d kb/s", bitrate / 1000);
948 }
949 }
950
951 unsigned avcodec_version( void )
952 {
953 return LIBAVCODEC_VERSION_INT;
954 }
955
956 const char *avcodec_configuration(void)
957 {
958 return FFMPEG_CONFIGURATION;
959 }
960
961 const char *avcodec_license(void)
962 {
963 #define LICENSE_PREFIX "libavcodec license: "
964 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
965 }
966
967 void avcodec_init(void)
968 {
969 static int initialized = 0;
970
971 if (initialized != 0)
972 return;
973 initialized = 1;
974
975 dsputil_static_init();
976 }
977
978 void avcodec_flush_buffers(AVCodecContext *avctx)
979 {
980 if(avctx->codec->flush)
981 avctx->codec->flush(avctx);
982 }
983
984 void avcodec_default_free_buffers(AVCodecContext *s){
985 int i, j;
986
987 if(s->internal_buffer==NULL) return;
988
989 if (s->internal_buffer_count)
990 av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
991 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
992 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
993 for(j=0; j<4; j++){
994 av_freep(&buf->base[j]);
995 buf->data[j]= NULL;
996 }
997 }
998 av_freep(&s->internal_buffer);
999
1000 s->internal_buffer_count=0;
1001 }
1002
1003 char av_get_pict_type_char(int pict_type){
1004 switch(pict_type){
1005 case FF_I_TYPE: return 'I';
1006 case FF_P_TYPE: return 'P';
1007 case FF_B_TYPE: return 'B';
1008 case FF_S_TYPE: return 'S';
1009 case FF_SI_TYPE:return 'i';
1010 case FF_SP_TYPE:return 'p';
1011 case FF_BI_TYPE:return 'b';
1012 default: return '?';
1013 }
1014 }
1015
1016 int av_get_bits_per_sample(enum CodecID codec_id){
1017 switch(codec_id){
1018 case CODEC_ID_ADPCM_SBPRO_2:
1019 return 2;
1020 case CODEC_ID_ADPCM_SBPRO_3:
1021 return 3;
1022 case CODEC_ID_ADPCM_SBPRO_4:
1023 case CODEC_ID_ADPCM_CT:
1024 case CODEC_ID_ADPCM_IMA_WAV:
1025 case CODEC_ID_ADPCM_MS:
1026 case CODEC_ID_ADPCM_YAMAHA:
1027 return 4;
1028 case CODEC_ID_PCM_ALAW:
1029 case CODEC_ID_PCM_MULAW:
1030 case CODEC_ID_PCM_S8:
1031 case CODEC_ID_PCM_U8:
1032 case CODEC_ID_PCM_ZORK:
1033 return 8;
1034 case CODEC_ID_PCM_S16BE:
1035 case CODEC_ID_PCM_S16LE:
1036 case CODEC_ID_PCM_S16LE_PLANAR:
1037 case CODEC_ID_PCM_U16BE:
1038 case CODEC_ID_PCM_U16LE:
1039 return 16;
1040 case CODEC_ID_PCM_S24DAUD:
1041 case CODEC_ID_PCM_S24BE:
1042 case CODEC_ID_PCM_S24LE:
1043 case CODEC_ID_PCM_U24BE:
1044 case CODEC_ID_PCM_U24LE:
1045 return 24;
1046 case CODEC_ID_PCM_S32BE:
1047 case CODEC_ID_PCM_S32LE:
1048 case CODEC_ID_PCM_U32BE:
1049 case CODEC_ID_PCM_U32LE:
1050 case CODEC_ID_PCM_F32BE:
1051 case CODEC_ID_PCM_F32LE:
1052 return 32;
1053 case CODEC_ID_PCM_F64BE:
1054 case CODEC_ID_PCM_F64LE:
1055 return 64;
1056 default:
1057 return 0;
1058 }
1059 }
1060
1061 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
1062 switch (sample_fmt) {
1063 case SAMPLE_FMT_U8:
1064 return 8;
1065 case SAMPLE_FMT_S16:
1066 return 16;
1067 case SAMPLE_FMT_S32:
1068 case SAMPLE_FMT_FLT:
1069 return 32;
1070 case SAMPLE_FMT_DBL:
1071 return 64;
1072 default:
1073 return 0;
1074 }
1075 }
1076
1077 #if !HAVE_THREADS
1078 int avcodec_thread_init(AVCodecContext *s, int thread_count){
1079 s->thread_count = thread_count;
1080 return -1;
1081 }
1082 #endif
1083
1084 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1085 {
1086 unsigned int n = 0;
1087
1088 while(v >= 0xff) {
1089 *s++ = 0xff;
1090 v -= 0xff;
1091 n++;
1092 }
1093 *s = v;
1094 n++;
1095 return n;
1096 }
1097
1098 #if LIBAVCODEC_VERSION_MAJOR < 53
1099 #include "libavcore/parseutils.h"
1100
1101 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1102 {
1103 return av_parse_video_size(width_ptr, height_ptr, str);
1104 }
1105
1106 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1107 {
1108 return av_parse_video_rate(frame_rate, arg);
1109 }
1110 #endif
1111
1112 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1113 int i;
1114 for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1115 return i;
1116 }
1117
1118 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1119 {
1120 av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1121 "version to the newest one from SVN. If the problem still "
1122 "occurs, it means that your file has a feature which has not "
1123 "been implemented.", feature);
1124 if(want_sample)
1125 av_log_ask_for_sample(avc, NULL);
1126 else
1127 av_log(avc, AV_LOG_WARNING, "\n");
1128 }
1129
1130 void av_log_ask_for_sample(void *avc, const char *msg)
1131 {
1132 if (msg)
1133 av_log(avc, AV_LOG_WARNING, "%s ", msg);
1134 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1135 "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1136 "and contact the ffmpeg-devel mailing list.\n");
1137 }
1138
1139 static AVHWAccel *first_hwaccel = NULL;
1140
1141 void av_register_hwaccel(AVHWAccel *hwaccel)
1142 {
1143 AVHWAccel **p = &first_hwaccel;
1144 while (*p)
1145 p = &(*p)->next;
1146 *p = hwaccel;
1147 hwaccel->next = NULL;
1148 }
1149
1150 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1151 {
1152 return hwaccel ? hwaccel->next : first_hwaccel;
1153 }
1154
1155 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1156 {
1157 AVHWAccel *hwaccel=NULL;
1158
1159 while((hwaccel= av_hwaccel_next(hwaccel))){
1160 if ( hwaccel->id == codec_id
1161 && hwaccel->pix_fmt == pix_fmt)
1162 return hwaccel;
1163 }
1164 return NULL;
1165 }
1166
1167 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1168 {
1169 if (ff_lockmgr_cb) {
1170 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1171 return -1;
1172 }
1173
1174 ff_lockmgr_cb = cb;
1175
1176 if (ff_lockmgr_cb) {
1177 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1178 return -1;
1179 }
1180 return 0;
1181 }
1182
1183 unsigned int ff_toupper4(unsigned int x)
1184 {
1185 return toupper( x &0xFF)
1186 + (toupper((x>>8 )&0xFF)<<8 )
1187 + (toupper((x>>16)&0xFF)<<16)
1188 + (toupper((x>>24)&0xFF)<<24);
1189 }