e01b51675130cec6483842f4aa4b62542d65a7f4
[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 "avcodec.h"
33 #include "dsputil.h"
34 #include "opt.h"
35 #include "imgconvert.h"
36 #include "audioconvert.h"
37 #include "internal.h"
38 #include <stdlib.h>
39 #include <stdarg.h>
40 #include <limits.h>
41 #include <float.h>
42
43 static int volatile entangled_thread_counter=0;
44 int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
45 static void *codec_mutex;
46
47 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
48 {
49 if(min_size < *size)
50 return ptr;
51
52 *size= FFMAX(17*min_size/16 + 32, min_size);
53
54 ptr= av_realloc(ptr, *size);
55 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
56 *size= 0;
57
58 return ptr;
59 }
60
61 void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
62 {
63 void **p = ptr;
64 if (min_size < *size)
65 return;
66 *size= FFMAX(17*min_size/16 + 32, min_size);
67 av_free(*p);
68 *p = av_malloc(*size);
69 if (!*p) *size = 0;
70 }
71
72 /* encoder management */
73 static AVCodec *first_avcodec = NULL;
74
75 AVCodec *av_codec_next(AVCodec *c){
76 if(c) return c->next;
77 else return first_avcodec;
78 }
79
80 void avcodec_register(AVCodec *codec)
81 {
82 AVCodec **p;
83 avcodec_init();
84 p = &first_avcodec;
85 while (*p != NULL) p = &(*p)->next;
86 *p = codec;
87 codec->next = NULL;
88 }
89
90 #if LIBAVCODEC_VERSION_MAJOR < 53
91 void register_avcodec(AVCodec *codec)
92 {
93 avcodec_register(codec);
94 }
95 #endif
96
97 unsigned avcodec_get_edge_width(void)
98 {
99 return EDGE_WIDTH;
100 }
101
102 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
103 s->coded_width = width;
104 s->coded_height= height;
105 s->width = -((-width )>>s->lowres);
106 s->height= -((-height)>>s->lowres);
107 }
108
109 typedef struct InternalBuffer{
110 int last_pic_num;
111 uint8_t *base[4];
112 uint8_t *data[4];
113 int linesize[4];
114 int width, height;
115 enum PixelFormat pix_fmt;
116 }InternalBuffer;
117
118 #define INTERNAL_BUFFER_SIZE 32
119
120 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
121 int w_align= 1;
122 int h_align= 1;
123
124 switch(s->pix_fmt){
125 case PIX_FMT_YUV420P:
126 case PIX_FMT_YUYV422:
127 case PIX_FMT_UYVY422:
128 case PIX_FMT_YUV422P:
129 case PIX_FMT_YUV440P:
130 case PIX_FMT_YUV444P:
131 case PIX_FMT_GRAY8:
132 case PIX_FMT_GRAY16BE:
133 case PIX_FMT_GRAY16LE:
134 case PIX_FMT_YUVJ420P:
135 case PIX_FMT_YUVJ422P:
136 case PIX_FMT_YUVJ440P:
137 case PIX_FMT_YUVJ444P:
138 case PIX_FMT_YUVA420P:
139 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
140 h_align= 16;
141 if(s->codec_id == CODEC_ID_MPEG2VIDEO || s->codec_id == CODEC_ID_MJPEG || s->codec_id == CODEC_ID_AMV || s->codec_id == CODEC_ID_THP)
142 h_align= 32; // interlaced is rounded up to 2 MBs
143 break;
144 case PIX_FMT_YUV411P:
145 case PIX_FMT_UYYVYY411:
146 w_align=32;
147 h_align=8;
148 break;
149 case PIX_FMT_YUV410P:
150 if(s->codec_id == CODEC_ID_SVQ1){
151 w_align=64;
152 h_align=64;
153 }
154 case PIX_FMT_RGB555:
155 if(s->codec_id == CODEC_ID_RPZA){
156 w_align=4;
157 h_align=4;
158 }
159 case PIX_FMT_PAL8:
160 case PIX_FMT_BGR8:
161 case PIX_FMT_RGB8:
162 if(s->codec_id == CODEC_ID_SMC){
163 w_align=4;
164 h_align=4;
165 }
166 break;
167 case PIX_FMT_BGR24:
168 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
169 w_align=4;
170 h_align=4;
171 }
172 break;
173 default:
174 w_align= 1;
175 h_align= 1;
176 break;
177 }
178
179 *width = FFALIGN(*width , w_align);
180 *height= FFALIGN(*height, h_align);
181 if(s->codec_id == CODEC_ID_H264)
182 *height+=2; // some of the optimized chroma MC reads one line too much
183
184 linesize_align[0] =
185 linesize_align[1] =
186 linesize_align[2] =
187 linesize_align[3] = STRIDE_ALIGN;
188 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
189 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
190 //picture size unneccessarily in some cases. The solution here is not
191 //pretty and better ideas are welcome!
192 #if HAVE_MMX
193 if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
194 s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
195 s->codec_id == CODEC_ID_VP6A) {
196 linesize_align[0] =
197 linesize_align[1] =
198 linesize_align[2] = 16;
199 }
200 #endif
201 }
202
203 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
204 int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
205 int linesize_align[4];
206 int align;
207 avcodec_align_dimensions2(s, width, height, linesize_align);
208 align = FFMAX(linesize_align[0], linesize_align[3]);
209 linesize_align[1] <<= chroma_shift;
210 linesize_align[2] <<= chroma_shift;
211 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
212 *width=FFALIGN(*width, align);
213 }
214
215 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
216 if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
217 return 0;
218
219 av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
220 return AVERROR(EINVAL);
221 }
222
223 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
224 int i;
225 int w= s->width;
226 int h= s->height;
227 InternalBuffer *buf;
228 int *picture_number;
229
230 if(pic->data[0]!=NULL) {
231 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
232 return -1;
233 }
234 if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
235 av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
236 return -1;
237 }
238
239 if(avcodec_check_dimensions(s,w,h))
240 return -1;
241
242 if(s->internal_buffer==NULL){
243 s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
244 }
245 #if 0
246 s->internal_buffer= av_fast_realloc(
247 s->internal_buffer,
248 &s->internal_buffer_size,
249 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
250 );
251 #endif
252
253 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
254 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
255 (*picture_number)++;
256
257 if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
258 for(i=0; i<4; i++){
259 av_freep(&buf->base[i]);
260 buf->data[i]= NULL;
261 }
262 }
263
264 if(buf->base[0]){
265 pic->age= *picture_number - buf->last_pic_num;
266 buf->last_pic_num= *picture_number;
267 }else{
268 int h_chroma_shift, v_chroma_shift;
269 int size[4] = {0};
270 int tmpsize;
271 int unaligned;
272 AVPicture picture;
273 int stride_align[4];
274
275 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
276
277 avcodec_align_dimensions2(s, &w, &h, stride_align);
278
279 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
280 w+= EDGE_WIDTH*2;
281 h+= EDGE_WIDTH*2;
282 }
283
284 do {
285 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
286 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
287 ff_fill_linesize(&picture, s->pix_fmt, w);
288 // increase alignment of w for next try (rhs gives the lowest bit set in w)
289 w += w & ~(w-1);
290
291 unaligned = 0;
292 for (i=0; i<4; i++){
293 unaligned |= picture.linesize[i] % stride_align[i];
294 }
295 } while (unaligned);
296
297 tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
298 if (tmpsize < 0)
299 return -1;
300
301 for (i=0; i<3 && picture.data[i+1]; i++)
302 size[i] = picture.data[i+1] - picture.data[i];
303 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
304
305 buf->last_pic_num= -256*256*256*64;
306 memset(buf->base, 0, sizeof(buf->base));
307 memset(buf->data, 0, sizeof(buf->data));
308
309 for(i=0; i<4 && size[i]; i++){
310 const int h_shift= i==0 ? 0 : h_chroma_shift;
311 const int v_shift= i==0 ? 0 : v_chroma_shift;
312
313 buf->linesize[i]= picture.linesize[i];
314
315 buf->base[i]= av_malloc(size[i]+16); //FIXME 16
316 if(buf->base[i]==NULL) return -1;
317 memset(buf->base[i], 128, size[i]);
318
319 // no edge if EDGE EMU or not planar YUV
320 if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
321 buf->data[i] = buf->base[i];
322 else
323 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
324 }
325 if(size[1] && !size[2])
326 ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
327 buf->width = s->width;
328 buf->height = s->height;
329 buf->pix_fmt= s->pix_fmt;
330 pic->age= 256*256*256*64;
331 }
332 pic->type= FF_BUFFER_TYPE_INTERNAL;
333
334 for(i=0; i<4; i++){
335 pic->base[i]= buf->base[i];
336 pic->data[i]= buf->data[i];
337 pic->linesize[i]= buf->linesize[i];
338 }
339 s->internal_buffer_count++;
340
341 pic->reordered_opaque= s->reordered_opaque;
342
343 if(s->debug&FF_DEBUG_BUFFERS)
344 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
345
346 return 0;
347 }
348
349 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
350 int i;
351 InternalBuffer *buf, *last;
352
353 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
354 assert(s->internal_buffer_count);
355
356 buf = NULL; /* avoids warning */
357 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
358 buf= &((InternalBuffer*)s->internal_buffer)[i];
359 if(buf->data[0] == pic->data[0])
360 break;
361 }
362 assert(i < s->internal_buffer_count);
363 s->internal_buffer_count--;
364 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
365
366 FFSWAP(InternalBuffer, *buf, *last);
367
368 for(i=0; i<4; i++){
369 pic->data[i]=NULL;
370 // pic->base[i]=NULL;
371 }
372 //printf("R%X\n", pic->opaque);
373
374 if(s->debug&FF_DEBUG_BUFFERS)
375 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
376 }
377
378 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
379 AVFrame temp_pic;
380 int i;
381
382 /* If no picture return a new buffer */
383 if(pic->data[0] == NULL) {
384 /* We will copy from buffer, so must be readable */
385 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
386 return s->get_buffer(s, pic);
387 }
388
389 /* If internal buffer type return the same buffer */
390 if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
391 pic->reordered_opaque= s->reordered_opaque;
392 return 0;
393 }
394
395 /*
396 * Not internal type and reget_buffer not overridden, emulate cr buffer
397 */
398 temp_pic = *pic;
399 for(i = 0; i < 4; i++)
400 pic->data[i] = pic->base[i] = NULL;
401 pic->opaque = NULL;
402 /* Allocate new frame */
403 if (s->get_buffer(s, pic))
404 return -1;
405 /* Copy image data from old buffer to new buffer */
406 av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
407 s->height);
408 s->release_buffer(s, &temp_pic); // Release old frame
409 return 0;
410 }
411
412 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
413 int i;
414
415 for(i=0; i<count; i++){
416 int r= func(c, (char*)arg + i*size);
417 if(ret) ret[i]= r;
418 }
419 return 0;
420 }
421
422 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
423 int i;
424
425 for(i=0; i<count; i++){
426 int r= func(c, arg, i, 0);
427 if(ret) ret[i]= r;
428 }
429 return 0;
430 }
431
432 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
433 while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
434 ++fmt;
435 return fmt[0];
436 }
437
438 void avcodec_get_frame_defaults(AVFrame *pic){
439 memset(pic, 0, sizeof(AVFrame));
440
441 pic->pts= AV_NOPTS_VALUE;
442 pic->key_frame= 1;
443 }
444
445 AVFrame *avcodec_alloc_frame(void){
446 AVFrame *pic= av_malloc(sizeof(AVFrame));
447
448 if(pic==NULL) return NULL;
449
450 avcodec_get_frame_defaults(pic);
451
452 return pic;
453 }
454
455 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
456 {
457 int ret= -1;
458
459 /* If there is a user-supplied mutex locking routine, call it. */
460 if (ff_lockmgr_cb) {
461 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
462 return -1;
463 }
464
465 entangled_thread_counter++;
466 if(entangled_thread_counter != 1){
467 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
468 goto end;
469 }
470
471 if(avctx->codec || !codec)
472 goto end;
473
474 if (codec->priv_data_size > 0) {
475 avctx->priv_data = av_mallocz(codec->priv_data_size);
476 if (!avctx->priv_data) {
477 ret = AVERROR(ENOMEM);
478 goto end;
479 }
480 } else {
481 avctx->priv_data = NULL;
482 }
483
484 if(avctx->coded_width && avctx->coded_height)
485 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
486 else if(avctx->width && avctx->height)
487 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
488
489 #define SANE_NB_CHANNELS 128U
490 if (((avctx->coded_width || avctx->coded_height)
491 && avcodec_check_dimensions(avctx, avctx->coded_width, avctx->coded_height))
492 || avctx->channels > SANE_NB_CHANNELS) {
493 ret = AVERROR(EINVAL);
494 goto free_and_end;
495 }
496
497 avctx->codec = codec;
498 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
499 avctx->codec_id == CODEC_ID_NONE) {
500 avctx->codec_type = codec->type;
501 avctx->codec_id = codec->id;
502 }
503 if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
504 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
505 goto free_and_end;
506 }
507 avctx->frame_number = 0;
508 if(avctx->codec->init){
509 if(avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
510 avctx->codec->max_lowres < avctx->lowres){
511 av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
512 avctx->codec->max_lowres);
513 goto free_and_end;
514 }
515
516 ret = avctx->codec->init(avctx);
517 if (ret < 0) {
518 goto free_and_end;
519 }
520 }
521 ret=0;
522 end:
523 entangled_thread_counter--;
524
525 /* Release any user-supplied mutex. */
526 if (ff_lockmgr_cb) {
527 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
528 }
529 return ret;
530 free_and_end:
531 av_freep(&avctx->priv_data);
532 avctx->codec= NULL;
533 goto end;
534 }
535
536 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
537 const short *samples)
538 {
539 if(buf_size < FF_MIN_BUFFER_SIZE && 0){
540 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
541 return -1;
542 }
543 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
544 int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
545 avctx->frame_number++;
546 return ret;
547 }else
548 return 0;
549 }
550
551 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
552 const AVFrame *pict)
553 {
554 if(buf_size < FF_MIN_BUFFER_SIZE){
555 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
556 return -1;
557 }
558 if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
559 return -1;
560 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
561 int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
562 avctx->frame_number++;
563 emms_c(); //needed to avoid an emms_c() call before every return;
564
565 return ret;
566 }else
567 return 0;
568 }
569
570 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
571 const AVSubtitle *sub)
572 {
573 int ret;
574 if(sub->start_display_time) {
575 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
576 return -1;
577 }
578 if(sub->num_rects == 0 || !sub->rects)
579 return -1;
580 ret = avctx->codec->encode(avctx, buf, buf_size, sub);
581 avctx->frame_number++;
582 return ret;
583 }
584
585 #if LIBAVCODEC_VERSION_MAJOR < 53
586 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
587 int *got_picture_ptr,
588 const uint8_t *buf, int buf_size)
589 {
590 AVPacket avpkt;
591 av_init_packet(&avpkt);
592 avpkt.data = buf;
593 avpkt.size = buf_size;
594 // HACK for CorePNG to decode as normal PNG by default
595 avpkt.flags = AV_PKT_FLAG_KEY;
596
597 return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
598 }
599 #endif
600
601 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
602 int *got_picture_ptr,
603 AVPacket *avpkt)
604 {
605 int ret;
606
607 *got_picture_ptr= 0;
608 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
609 return -1;
610 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
611 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
612 avpkt);
613
614 emms_c(); //needed to avoid an emms_c() call before every return;
615
616 if (*got_picture_ptr)
617 avctx->frame_number++;
618 }else
619 ret= 0;
620
621 return ret;
622 }
623
624 #if LIBAVCODEC_VERSION_MAJOR < 53
625 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
626 int *frame_size_ptr,
627 const uint8_t *buf, int buf_size)
628 {
629 AVPacket avpkt;
630 av_init_packet(&avpkt);
631 avpkt.data = buf;
632 avpkt.size = buf_size;
633
634 return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
635 }
636 #endif
637
638 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
639 int *frame_size_ptr,
640 AVPacket *avpkt)
641 {
642 int ret;
643
644 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
645 //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
646 if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
647 av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
648 return -1;
649 }
650 if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
651 *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
652 av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
653 return -1;
654 }
655
656 ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
657 avctx->frame_number++;
658 }else{
659 ret= 0;
660 *frame_size_ptr=0;
661 }
662 return ret;
663 }
664
665 #if LIBAVCODEC_VERSION_MAJOR < 53
666 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
667 int *got_sub_ptr,
668 const uint8_t *buf, int buf_size)
669 {
670 AVPacket avpkt;
671 av_init_packet(&avpkt);
672 avpkt.data = buf;
673 avpkt.size = buf_size;
674
675 return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
676 }
677 #endif
678
679 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
680 int *got_sub_ptr,
681 AVPacket *avpkt)
682 {
683 int ret;
684
685 *got_sub_ptr = 0;
686 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
687 if (*got_sub_ptr)
688 avctx->frame_number++;
689 return ret;
690 }
691
692 void avsubtitle_free(AVSubtitle *sub)
693 {
694 int i;
695
696 for (i = 0; i < sub->num_rects; i++)
697 {
698 av_freep(&sub->rects[i]->pict.data[0]);
699 av_freep(&sub->rects[i]->pict.data[1]);
700 av_freep(&sub->rects[i]->pict.data[2]);
701 av_freep(&sub->rects[i]->pict.data[3]);
702 av_freep(&sub->rects[i]->text);
703 av_freep(&sub->rects[i]->ass);
704 av_freep(&sub->rects[i]);
705 }
706
707 av_freep(&sub->rects);
708
709 memset(sub, 0, sizeof(AVSubtitle));
710 }
711
712 av_cold int avcodec_close(AVCodecContext *avctx)
713 {
714 /* If there is a user-supplied mutex locking routine, call it. */
715 if (ff_lockmgr_cb) {
716 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
717 return -1;
718 }
719
720 entangled_thread_counter++;
721 if(entangled_thread_counter != 1){
722 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
723 entangled_thread_counter--;
724 return -1;
725 }
726
727 if (HAVE_THREADS && avctx->thread_opaque)
728 avcodec_thread_free(avctx);
729 if (avctx->codec && avctx->codec->close)
730 avctx->codec->close(avctx);
731 avcodec_default_free_buffers(avctx);
732 avctx->coded_frame = NULL;
733 av_freep(&avctx->priv_data);
734 if(avctx->codec && avctx->codec->encode)
735 av_freep(&avctx->extradata);
736 avctx->codec = NULL;
737 entangled_thread_counter--;
738
739 /* Release any user-supplied mutex. */
740 if (ff_lockmgr_cb) {
741 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
742 }
743 return 0;
744 }
745
746 AVCodec *avcodec_find_encoder(enum CodecID id)
747 {
748 AVCodec *p, *experimental=NULL;
749 p = first_avcodec;
750 while (p) {
751 if (p->encode != NULL && p->id == id) {
752 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
753 experimental = p;
754 } else
755 return p;
756 }
757 p = p->next;
758 }
759 return experimental;
760 }
761
762 AVCodec *avcodec_find_encoder_by_name(const char *name)
763 {
764 AVCodec *p;
765 if (!name)
766 return NULL;
767 p = first_avcodec;
768 while (p) {
769 if (p->encode != NULL && strcmp(name,p->name) == 0)
770 return p;
771 p = p->next;
772 }
773 return NULL;
774 }
775
776 AVCodec *avcodec_find_decoder(enum CodecID id)
777 {
778 AVCodec *p;
779 p = first_avcodec;
780 while (p) {
781 if (p->decode != NULL && p->id == id)
782 return p;
783 p = p->next;
784 }
785 return NULL;
786 }
787
788 AVCodec *avcodec_find_decoder_by_name(const char *name)
789 {
790 AVCodec *p;
791 if (!name)
792 return NULL;
793 p = first_avcodec;
794 while (p) {
795 if (p->decode != NULL && strcmp(name,p->name) == 0)
796 return p;
797 p = p->next;
798 }
799 return NULL;
800 }
801
802 static int get_bit_rate(AVCodecContext *ctx)
803 {
804 int bit_rate;
805 int bits_per_sample;
806
807 switch(ctx->codec_type) {
808 case AVMEDIA_TYPE_VIDEO:
809 case AVMEDIA_TYPE_DATA:
810 case AVMEDIA_TYPE_SUBTITLE:
811 case AVMEDIA_TYPE_ATTACHMENT:
812 bit_rate = ctx->bit_rate;
813 break;
814 case AVMEDIA_TYPE_AUDIO:
815 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
816 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
817 break;
818 default:
819 bit_rate = 0;
820 break;
821 }
822 return bit_rate;
823 }
824
825 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
826 {
827 int i, len, ret = 0;
828
829 for (i = 0; i < 4; i++) {
830 len = snprintf(buf, buf_size,
831 isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
832 buf += len;
833 buf_size = buf_size > len ? buf_size - len : 0;
834 ret += len;
835 codec_tag>>=8;
836 }
837 return ret;
838 }
839
840 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
841 {
842 const char *codec_name;
843 AVCodec *p;
844 char buf1[32];
845 int bitrate;
846 AVRational display_aspect_ratio;
847
848 if (encode)
849 p = avcodec_find_encoder(enc->codec_id);
850 else
851 p = avcodec_find_decoder(enc->codec_id);
852
853 if (p) {
854 codec_name = p->name;
855 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
856 /* fake mpeg2 transport stream codec (currently not
857 registered) */
858 codec_name = "mpeg2ts";
859 } else if (enc->codec_name[0] != '\0') {
860 codec_name = enc->codec_name;
861 } else {
862 /* output avi tags */
863 char tag_buf[32];
864 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
865 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
866 codec_name = buf1;
867 }
868
869 switch(enc->codec_type) {
870 case AVMEDIA_TYPE_VIDEO:
871 snprintf(buf, buf_size,
872 "Video: %s%s",
873 codec_name, enc->mb_decision ? " (hq)" : "");
874 if (enc->pix_fmt != PIX_FMT_NONE) {
875 snprintf(buf + strlen(buf), buf_size - strlen(buf),
876 ", %s",
877 avcodec_get_pix_fmt_name(enc->pix_fmt));
878 }
879 if (enc->width) {
880 snprintf(buf + strlen(buf), buf_size - strlen(buf),
881 ", %dx%d",
882 enc->width, enc->height);
883 if (enc->sample_aspect_ratio.num) {
884 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
885 enc->width*enc->sample_aspect_ratio.num,
886 enc->height*enc->sample_aspect_ratio.den,
887 1024*1024);
888 snprintf(buf + strlen(buf), buf_size - strlen(buf),
889 " [PAR %d:%d DAR %d:%d]",
890 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
891 display_aspect_ratio.num, display_aspect_ratio.den);
892 }
893 if(av_log_get_level() >= AV_LOG_DEBUG){
894 int g= av_gcd(enc->time_base.num, enc->time_base.den);
895 snprintf(buf + strlen(buf), buf_size - strlen(buf),
896 ", %d/%d",
897 enc->time_base.num/g, enc->time_base.den/g);
898 }
899 }
900 if (encode) {
901 snprintf(buf + strlen(buf), buf_size - strlen(buf),
902 ", q=%d-%d", enc->qmin, enc->qmax);
903 }
904 break;
905 case AVMEDIA_TYPE_AUDIO:
906 snprintf(buf, buf_size,
907 "Audio: %s",
908 codec_name);
909 if (enc->sample_rate) {
910 snprintf(buf + strlen(buf), buf_size - strlen(buf),
911 ", %d Hz", enc->sample_rate);
912 }
913 av_strlcat(buf, ", ", buf_size);
914 avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
915 if (enc->sample_fmt != SAMPLE_FMT_NONE) {
916 snprintf(buf + strlen(buf), buf_size - strlen(buf),
917 ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
918 }
919 break;
920 case AVMEDIA_TYPE_DATA:
921 snprintf(buf, buf_size, "Data: %s", codec_name);
922 break;
923 case AVMEDIA_TYPE_SUBTITLE:
924 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
925 break;
926 case AVMEDIA_TYPE_ATTACHMENT:
927 snprintf(buf, buf_size, "Attachment: %s", codec_name);
928 break;
929 default:
930 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
931 return;
932 }
933 if (encode) {
934 if (enc->flags & CODEC_FLAG_PASS1)
935 snprintf(buf + strlen(buf), buf_size - strlen(buf),
936 ", pass 1");
937 if (enc->flags & CODEC_FLAG_PASS2)
938 snprintf(buf + strlen(buf), buf_size - strlen(buf),
939 ", pass 2");
940 }
941 bitrate = get_bit_rate(enc);
942 if (bitrate != 0) {
943 snprintf(buf + strlen(buf), buf_size - strlen(buf),
944 ", %d kb/s", bitrate / 1000);
945 }
946 }
947
948 unsigned avcodec_version( void )
949 {
950 return LIBAVCODEC_VERSION_INT;
951 }
952
953 const char *avcodec_configuration(void)
954 {
955 return FFMPEG_CONFIGURATION;
956 }
957
958 const char *avcodec_license(void)
959 {
960 #define LICENSE_PREFIX "libavcodec license: "
961 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
962 }
963
964 void avcodec_init(void)
965 {
966 static int initialized = 0;
967
968 if (initialized != 0)
969 return;
970 initialized = 1;
971
972 dsputil_static_init();
973 }
974
975 void avcodec_flush_buffers(AVCodecContext *avctx)
976 {
977 if(avctx->codec->flush)
978 avctx->codec->flush(avctx);
979 }
980
981 void avcodec_default_free_buffers(AVCodecContext *s){
982 int i, j;
983
984 if(s->internal_buffer==NULL) return;
985
986 if (s->internal_buffer_count)
987 av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
988 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
989 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
990 for(j=0; j<4; j++){
991 av_freep(&buf->base[j]);
992 buf->data[j]= NULL;
993 }
994 }
995 av_freep(&s->internal_buffer);
996
997 s->internal_buffer_count=0;
998 }
999
1000 char av_get_pict_type_char(int pict_type){
1001 switch(pict_type){
1002 case FF_I_TYPE: return 'I';
1003 case FF_P_TYPE: return 'P';
1004 case FF_B_TYPE: return 'B';
1005 case FF_S_TYPE: return 'S';
1006 case FF_SI_TYPE:return 'i';
1007 case FF_SP_TYPE:return 'p';
1008 case FF_BI_TYPE:return 'b';
1009 default: return '?';
1010 }
1011 }
1012
1013 int av_get_bits_per_sample(enum CodecID codec_id){
1014 switch(codec_id){
1015 case CODEC_ID_ADPCM_SBPRO_2:
1016 return 2;
1017 case CODEC_ID_ADPCM_SBPRO_3:
1018 return 3;
1019 case CODEC_ID_ADPCM_SBPRO_4:
1020 case CODEC_ID_ADPCM_CT:
1021 case CODEC_ID_ADPCM_IMA_WAV:
1022 case CODEC_ID_ADPCM_MS:
1023 case CODEC_ID_ADPCM_YAMAHA:
1024 return 4;
1025 case CODEC_ID_PCM_ALAW:
1026 case CODEC_ID_PCM_MULAW:
1027 case CODEC_ID_PCM_S8:
1028 case CODEC_ID_PCM_U8:
1029 case CODEC_ID_PCM_ZORK:
1030 return 8;
1031 case CODEC_ID_PCM_S16BE:
1032 case CODEC_ID_PCM_S16LE:
1033 case CODEC_ID_PCM_S16LE_PLANAR:
1034 case CODEC_ID_PCM_U16BE:
1035 case CODEC_ID_PCM_U16LE:
1036 return 16;
1037 case CODEC_ID_PCM_S24DAUD:
1038 case CODEC_ID_PCM_S24BE:
1039 case CODEC_ID_PCM_S24LE:
1040 case CODEC_ID_PCM_U24BE:
1041 case CODEC_ID_PCM_U24LE:
1042 return 24;
1043 case CODEC_ID_PCM_S32BE:
1044 case CODEC_ID_PCM_S32LE:
1045 case CODEC_ID_PCM_U32BE:
1046 case CODEC_ID_PCM_U32LE:
1047 case CODEC_ID_PCM_F32BE:
1048 case CODEC_ID_PCM_F32LE:
1049 return 32;
1050 case CODEC_ID_PCM_F64BE:
1051 case CODEC_ID_PCM_F64LE:
1052 return 64;
1053 default:
1054 return 0;
1055 }
1056 }
1057
1058 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
1059 switch (sample_fmt) {
1060 case SAMPLE_FMT_U8:
1061 return 8;
1062 case SAMPLE_FMT_S16:
1063 return 16;
1064 case SAMPLE_FMT_S32:
1065 case SAMPLE_FMT_FLT:
1066 return 32;
1067 case SAMPLE_FMT_DBL:
1068 return 64;
1069 default:
1070 return 0;
1071 }
1072 }
1073
1074 #if !HAVE_THREADS
1075 int avcodec_thread_init(AVCodecContext *s, int thread_count){
1076 s->thread_count = thread_count;
1077 return -1;
1078 }
1079 #endif
1080
1081 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1082 {
1083 unsigned int n = 0;
1084
1085 while(v >= 0xff) {
1086 *s++ = 0xff;
1087 v -= 0xff;
1088 n++;
1089 }
1090 *s = v;
1091 n++;
1092 return n;
1093 }
1094
1095 #if LIBAVCODEC_VERSION_MAJOR < 53
1096 #include "libavcore/parseutils.h"
1097
1098 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1099 {
1100 return av_parse_video_size(width_ptr, height_ptr, str);
1101 }
1102
1103 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1104 {
1105 return av_parse_video_rate(frame_rate, arg);
1106 }
1107 #endif
1108
1109 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1110 int i;
1111 for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1112 return i;
1113 }
1114
1115 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1116 {
1117 av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1118 "version to the newest one from SVN. If the problem still "
1119 "occurs, it means that your file has a feature which has not "
1120 "been implemented.", feature);
1121 if(want_sample)
1122 av_log_ask_for_sample(avc, NULL);
1123 else
1124 av_log(avc, AV_LOG_WARNING, "\n");
1125 }
1126
1127 void av_log_ask_for_sample(void *avc, const char *msg)
1128 {
1129 if (msg)
1130 av_log(avc, AV_LOG_WARNING, "%s ", msg);
1131 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1132 "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1133 "and contact the ffmpeg-devel mailing list.\n");
1134 }
1135
1136 static AVHWAccel *first_hwaccel = NULL;
1137
1138 void av_register_hwaccel(AVHWAccel *hwaccel)
1139 {
1140 AVHWAccel **p = &first_hwaccel;
1141 while (*p)
1142 p = &(*p)->next;
1143 *p = hwaccel;
1144 hwaccel->next = NULL;
1145 }
1146
1147 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1148 {
1149 return hwaccel ? hwaccel->next : first_hwaccel;
1150 }
1151
1152 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1153 {
1154 AVHWAccel *hwaccel=NULL;
1155
1156 while((hwaccel= av_hwaccel_next(hwaccel))){
1157 if ( hwaccel->id == codec_id
1158 && hwaccel->pix_fmt == pix_fmt)
1159 return hwaccel;
1160 }
1161 return NULL;
1162 }
1163
1164 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1165 {
1166 if (ff_lockmgr_cb) {
1167 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1168 return -1;
1169 }
1170
1171 ff_lockmgr_cb = cb;
1172
1173 if (ff_lockmgr_cb) {
1174 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1175 return -1;
1176 }
1177 return 0;
1178 }
1179
1180 unsigned int ff_toupper4(unsigned int x)
1181 {
1182 return toupper( x &0xFF)
1183 + (toupper((x>>8 )&0xFF)<<8 )
1184 + (toupper((x>>16)&0xFF)<<16)
1185 + (toupper((x>>24)&0xFF)<<24);
1186 }