Define AVMediaType enum, and use it instead of enum CodecType, which
[libav.git] / libavcodec / utils.c
1 /*
2 * utils for libavcodec
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file libavcodec/utils.c
25 * utils.
26 */
27
28 /* needed for mkstemp() */
29 #define _XOPEN_SOURCE 600
30
31 #include "libavutil/avstring.h"
32 #include "libavutil/integer.h"
33 #include "libavutil/crc.h"
34 #include "libavutil/pixdesc.h"
35 #include "avcodec.h"
36 #include "dsputil.h"
37 #include "opt.h"
38 #include "imgconvert.h"
39 #include "audioconvert.h"
40 #include "libxvid_internal.h"
41 #include "internal.h"
42 #include <stdlib.h>
43 #include <stdarg.h>
44 #include <limits.h>
45 #include <float.h>
46 #if !HAVE_MKSTEMP
47 #include <fcntl.h>
48 #endif
49
50 static int volatile entangled_thread_counter=0;
51 int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
52 static void *codec_mutex;
53
54 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
55 {
56 if(min_size < *size)
57 return ptr;
58
59 *size= FFMAX(17*min_size/16 + 32, min_size);
60
61 ptr= av_realloc(ptr, *size);
62 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
63 *size= 0;
64
65 return ptr;
66 }
67
68 void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
69 {
70 void **p = ptr;
71 if (min_size < *size)
72 return;
73 *size= FFMAX(17*min_size/16 + 32, min_size);
74 av_free(*p);
75 *p = av_malloc(*size);
76 if (!*p) *size = 0;
77 }
78
79 /* encoder management */
80 static AVCodec *first_avcodec = NULL;
81
82 AVCodec *av_codec_next(AVCodec *c){
83 if(c) return c->next;
84 else return first_avcodec;
85 }
86
87 void avcodec_register(AVCodec *codec)
88 {
89 AVCodec **p;
90 avcodec_init();
91 p = &first_avcodec;
92 while (*p != NULL) p = &(*p)->next;
93 *p = codec;
94 codec->next = NULL;
95 }
96
97 #if LIBAVCODEC_VERSION_MAJOR < 53
98 void register_avcodec(AVCodec *codec)
99 {
100 avcodec_register(codec);
101 }
102 #endif
103
104 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
105 s->coded_width = width;
106 s->coded_height= height;
107 s->width = -((-width )>>s->lowres);
108 s->height= -((-height)>>s->lowres);
109 }
110
111 typedef struct InternalBuffer{
112 int last_pic_num;
113 uint8_t *base[4];
114 uint8_t *data[4];
115 int linesize[4];
116 int width, height;
117 enum PixelFormat pix_fmt;
118 }InternalBuffer;
119
120 #define INTERNAL_BUFFER_SIZE 32
121
122 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
123 int w_align= 1;
124 int h_align= 1;
125
126 switch(s->pix_fmt){
127 case PIX_FMT_YUV420P:
128 case PIX_FMT_YUYV422:
129 case PIX_FMT_UYVY422:
130 case PIX_FMT_YUV422P:
131 case PIX_FMT_YUV440P:
132 case PIX_FMT_YUV444P:
133 case PIX_FMT_GRAY8:
134 case PIX_FMT_GRAY16BE:
135 case PIX_FMT_GRAY16LE:
136 case PIX_FMT_YUVJ420P:
137 case PIX_FMT_YUVJ422P:
138 case PIX_FMT_YUVJ440P:
139 case PIX_FMT_YUVJ444P:
140 case PIX_FMT_YUVA420P:
141 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
142 h_align= 16;
143 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)
144 h_align= 32; // interlaced is rounded up to 2 MBs
145 break;
146 case PIX_FMT_YUV411P:
147 case PIX_FMT_UYYVYY411:
148 w_align=32;
149 h_align=8;
150 break;
151 case PIX_FMT_YUV410P:
152 if(s->codec_id == CODEC_ID_SVQ1){
153 w_align=64;
154 h_align=64;
155 }
156 case PIX_FMT_RGB555:
157 if(s->codec_id == CODEC_ID_RPZA){
158 w_align=4;
159 h_align=4;
160 }
161 case PIX_FMT_PAL8:
162 case PIX_FMT_BGR8:
163 case PIX_FMT_RGB8:
164 if(s->codec_id == CODEC_ID_SMC){
165 w_align=4;
166 h_align=4;
167 }
168 break;
169 case PIX_FMT_BGR24:
170 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
171 w_align=4;
172 h_align=4;
173 }
174 break;
175 default:
176 w_align= 1;
177 h_align= 1;
178 break;
179 }
180
181 *width = FFALIGN(*width , w_align);
182 *height= FFALIGN(*height, h_align);
183 if(s->codec_id == CODEC_ID_H264)
184 *height+=2; // some of the optimized chroma MC reads one line too much
185
186 linesize_align[0] =
187 linesize_align[1] =
188 linesize_align[2] =
189 linesize_align[3] = STRIDE_ALIGN;
190 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
191 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
192 //picture size unneccessarily in some cases. The solution here is not
193 //pretty and better ideas are welcome!
194 #if HAVE_MMX
195 if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
196 s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
197 s->codec_id == CODEC_ID_VP6A) {
198 linesize_align[0] =
199 linesize_align[1] =
200 linesize_align[2] = 16;
201 }
202 #endif
203 }
204
205 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
206 int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
207 int linesize_align[4];
208 int align;
209 avcodec_align_dimensions2(s, width, height, linesize_align);
210 align = FFMAX(linesize_align[0], linesize_align[3]);
211 linesize_align[1] <<= chroma_shift;
212 linesize_align[2] <<= chroma_shift;
213 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
214 *width=FFALIGN(*width, align);
215 }
216
217 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
218 if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
219 return 0;
220
221 av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
222 return -1;
223 }
224
225 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
226 int i;
227 int w= s->width;
228 int h= s->height;
229 InternalBuffer *buf;
230 int *picture_number;
231
232 if(pic->data[0]!=NULL) {
233 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
234 return -1;
235 }
236 if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
237 av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
238 return -1;
239 }
240
241 if(avcodec_check_dimensions(s,w,h))
242 return -1;
243
244 if(s->internal_buffer==NULL){
245 s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
246 }
247 #if 0
248 s->internal_buffer= av_fast_realloc(
249 s->internal_buffer,
250 &s->internal_buffer_size,
251 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
252 );
253 #endif
254
255 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
256 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
257 (*picture_number)++;
258
259 if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
260 for(i=0; i<4; i++){
261 av_freep(&buf->base[i]);
262 buf->data[i]= NULL;
263 }
264 }
265
266 if(buf->base[0]){
267 pic->age= *picture_number - buf->last_pic_num;
268 buf->last_pic_num= *picture_number;
269 }else{
270 int h_chroma_shift, v_chroma_shift;
271 int size[4] = {0};
272 int tmpsize;
273 int unaligned;
274 AVPicture picture;
275 int stride_align[4];
276
277 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
278
279 avcodec_align_dimensions2(s, &w, &h, stride_align);
280
281 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
282 w+= EDGE_WIDTH*2;
283 h+= EDGE_WIDTH*2;
284 }
285
286 do {
287 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
288 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
289 ff_fill_linesize(&picture, s->pix_fmt, w);
290 // increase alignment of w for next try (rhs gives the lowest bit set in w)
291 w += w & ~(w-1);
292
293 unaligned = 0;
294 for (i=0; i<4; i++){
295 unaligned |= picture.linesize[i] % stride_align[i];
296 }
297 } while (unaligned);
298
299 tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
300 if (tmpsize < 0)
301 return -1;
302
303 for (i=0; i<3 && picture.data[i+1]; i++)
304 size[i] = picture.data[i+1] - picture.data[i];
305 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
306
307 buf->last_pic_num= -256*256*256*64;
308 memset(buf->base, 0, sizeof(buf->base));
309 memset(buf->data, 0, sizeof(buf->data));
310
311 for(i=0; i<4 && size[i]; i++){
312 const int h_shift= i==0 ? 0 : h_chroma_shift;
313 const int v_shift= i==0 ? 0 : v_chroma_shift;
314
315 buf->linesize[i]= picture.linesize[i];
316
317 buf->base[i]= av_malloc(size[i]+16); //FIXME 16
318 if(buf->base[i]==NULL) return -1;
319 memset(buf->base[i], 128, size[i]);
320
321 // no edge if EDEG EMU or not planar YUV
322 if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
323 buf->data[i] = buf->base[i];
324 else
325 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
326 }
327 if(size[1] && !size[2])
328 ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
329 buf->width = s->width;
330 buf->height = s->height;
331 buf->pix_fmt= s->pix_fmt;
332 pic->age= 256*256*256*64;
333 }
334 pic->type= FF_BUFFER_TYPE_INTERNAL;
335
336 for(i=0; i<4; i++){
337 pic->base[i]= buf->base[i];
338 pic->data[i]= buf->data[i];
339 pic->linesize[i]= buf->linesize[i];
340 }
341 s->internal_buffer_count++;
342
343 pic->reordered_opaque= s->reordered_opaque;
344
345 if(s->debug&FF_DEBUG_BUFFERS)
346 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
347
348 return 0;
349 }
350
351 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
352 int i;
353 InternalBuffer *buf, *last;
354
355 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
356 assert(s->internal_buffer_count);
357
358 buf = NULL; /* avoids warning */
359 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
360 buf= &((InternalBuffer*)s->internal_buffer)[i];
361 if(buf->data[0] == pic->data[0])
362 break;
363 }
364 assert(i < s->internal_buffer_count);
365 s->internal_buffer_count--;
366 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
367
368 FFSWAP(InternalBuffer, *buf, *last);
369
370 for(i=0; i<4; i++){
371 pic->data[i]=NULL;
372 // pic->base[i]=NULL;
373 }
374 //printf("R%X\n", pic->opaque);
375
376 if(s->debug&FF_DEBUG_BUFFERS)
377 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
378 }
379
380 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
381 AVFrame temp_pic;
382 int i;
383
384 /* If no picture return a new buffer */
385 if(pic->data[0] == NULL) {
386 /* We will copy from buffer, so must be readable */
387 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
388 return s->get_buffer(s, pic);
389 }
390
391 /* If internal buffer type return the same buffer */
392 if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
393 pic->reordered_opaque= s->reordered_opaque;
394 return 0;
395 }
396
397 /*
398 * Not internal type and reget_buffer not overridden, emulate cr buffer
399 */
400 temp_pic = *pic;
401 for(i = 0; i < 4; i++)
402 pic->data[i] = pic->base[i] = NULL;
403 pic->opaque = NULL;
404 /* Allocate new frame */
405 if (s->get_buffer(s, pic))
406 return -1;
407 /* Copy image data from old buffer to new buffer */
408 av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
409 s->height);
410 s->release_buffer(s, &temp_pic); // Release old frame
411 return 0;
412 }
413
414 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
415 int i;
416
417 for(i=0; i<count; i++){
418 int r= func(c, (char*)arg + i*size);
419 if(ret) ret[i]= r;
420 }
421 return 0;
422 }
423
424 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
425 int i;
426
427 for(i=0; i<count; i++){
428 int r= func(c, arg, i, 0);
429 if(ret) ret[i]= r;
430 }
431 return 0;
432 }
433
434 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
435 while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
436 ++fmt;
437 return fmt[0];
438 }
439
440 void avcodec_get_frame_defaults(AVFrame *pic){
441 memset(pic, 0, sizeof(AVFrame));
442
443 pic->pts= AV_NOPTS_VALUE;
444 pic->key_frame= 1;
445 }
446
447 AVFrame *avcodec_alloc_frame(void){
448 AVFrame *pic= av_malloc(sizeof(AVFrame));
449
450 if(pic==NULL) return NULL;
451
452 avcodec_get_frame_defaults(pic);
453
454 return pic;
455 }
456
457 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
458 {
459 int ret= -1;
460
461 /* If there is a user-supplied mutex locking routine, call it. */
462 if (ff_lockmgr_cb) {
463 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
464 return -1;
465 }
466
467 entangled_thread_counter++;
468 if(entangled_thread_counter != 1){
469 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
470 goto end;
471 }
472
473 if(avctx->codec || !codec)
474 goto end;
475
476 if (codec->priv_data_size > 0) {
477 avctx->priv_data = av_mallocz(codec->priv_data_size);
478 if (!avctx->priv_data) {
479 ret = AVERROR(ENOMEM);
480 goto end;
481 }
482 } else {
483 avctx->priv_data = NULL;
484 }
485
486 if(avctx->coded_width && avctx->coded_height)
487 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
488 else if(avctx->width && avctx->height)
489 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
490
491 #define SANE_NB_CHANNELS 128U
492 if (((avctx->coded_width || avctx->coded_height)
493 && avcodec_check_dimensions(avctx, avctx->coded_width, avctx->coded_height))
494 || avctx->channels > SANE_NB_CHANNELS) {
495 ret = AVERROR(EINVAL);
496 goto free_and_end;
497 }
498
499 avctx->codec = codec;
500 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
501 avctx->codec_id == CODEC_ID_NONE) {
502 avctx->codec_type = codec->type;
503 avctx->codec_id = codec->id;
504 }
505 if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
506 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
507 goto free_and_end;
508 }
509 avctx->frame_number = 0;
510 if(avctx->codec->init){
511 ret = avctx->codec->init(avctx);
512 if (ret < 0) {
513 goto free_and_end;
514 }
515 }
516 ret=0;
517 end:
518 entangled_thread_counter--;
519
520 /* Release any user-supplied mutex. */
521 if (ff_lockmgr_cb) {
522 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
523 }
524 return ret;
525 free_and_end:
526 av_freep(&avctx->priv_data);
527 avctx->codec= NULL;
528 goto end;
529 }
530
531 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
532 const short *samples)
533 {
534 if(buf_size < FF_MIN_BUFFER_SIZE && 0){
535 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
536 return -1;
537 }
538 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
539 int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
540 avctx->frame_number++;
541 return ret;
542 }else
543 return 0;
544 }
545
546 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
547 const AVFrame *pict)
548 {
549 if(buf_size < FF_MIN_BUFFER_SIZE){
550 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
551 return -1;
552 }
553 if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
554 return -1;
555 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
556 int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
557 avctx->frame_number++;
558 emms_c(); //needed to avoid an emms_c() call before every return;
559
560 return ret;
561 }else
562 return 0;
563 }
564
565 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
566 const AVSubtitle *sub)
567 {
568 int ret;
569 if(sub->start_display_time) {
570 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
571 return -1;
572 }
573 if(sub->num_rects == 0 || !sub->rects)
574 return -1;
575 ret = avctx->codec->encode(avctx, buf, buf_size, sub);
576 avctx->frame_number++;
577 return ret;
578 }
579
580 #if LIBAVCODEC_VERSION_MAJOR < 53
581 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
582 int *got_picture_ptr,
583 const uint8_t *buf, int buf_size)
584 {
585 AVPacket avpkt;
586 av_init_packet(&avpkt);
587 avpkt.data = buf;
588 avpkt.size = buf_size;
589 // HACK for CorePNG to decode as normal PNG by default
590 avpkt.flags = AV_PKT_FLAG_KEY;
591
592 return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
593 }
594 #endif
595
596 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
597 int *got_picture_ptr,
598 AVPacket *avpkt)
599 {
600 int ret;
601
602 *got_picture_ptr= 0;
603 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
604 return -1;
605 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
606 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
607 avpkt);
608
609 emms_c(); //needed to avoid an emms_c() call before every return;
610
611 if (*got_picture_ptr)
612 avctx->frame_number++;
613 }else
614 ret= 0;
615
616 return ret;
617 }
618
619 #if LIBAVCODEC_VERSION_MAJOR < 53
620 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
621 int *frame_size_ptr,
622 const uint8_t *buf, int buf_size)
623 {
624 AVPacket avpkt;
625 av_init_packet(&avpkt);
626 avpkt.data = buf;
627 avpkt.size = buf_size;
628
629 return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
630 }
631 #endif
632
633 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
634 int *frame_size_ptr,
635 AVPacket *avpkt)
636 {
637 int ret;
638
639 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
640 //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
641 if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
642 av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
643 return -1;
644 }
645 if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
646 *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
647 av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
648 return -1;
649 }
650
651 ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
652 avctx->frame_number++;
653 }else{
654 ret= 0;
655 *frame_size_ptr=0;
656 }
657 return ret;
658 }
659
660 #if LIBAVCODEC_VERSION_MAJOR < 53
661 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
662 int *got_sub_ptr,
663 const uint8_t *buf, int buf_size)
664 {
665 AVPacket avpkt;
666 av_init_packet(&avpkt);
667 avpkt.data = buf;
668 avpkt.size = buf_size;
669
670 return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
671 }
672 #endif
673
674 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
675 int *got_sub_ptr,
676 AVPacket *avpkt)
677 {
678 int ret;
679
680 *got_sub_ptr = 0;
681 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
682 if (*got_sub_ptr)
683 avctx->frame_number++;
684 return ret;
685 }
686
687 av_cold int avcodec_close(AVCodecContext *avctx)
688 {
689 /* If there is a user-supplied mutex locking routine, call it. */
690 if (ff_lockmgr_cb) {
691 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
692 return -1;
693 }
694
695 entangled_thread_counter++;
696 if(entangled_thread_counter != 1){
697 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
698 entangled_thread_counter--;
699 return -1;
700 }
701
702 if (HAVE_THREADS && avctx->thread_opaque)
703 avcodec_thread_free(avctx);
704 if (avctx->codec && avctx->codec->close)
705 avctx->codec->close(avctx);
706 avcodec_default_free_buffers(avctx);
707 av_freep(&avctx->priv_data);
708 if(avctx->codec->encode)
709 av_freep(&avctx->extradata);
710 avctx->codec = NULL;
711 entangled_thread_counter--;
712
713 /* Release any user-supplied mutex. */
714 if (ff_lockmgr_cb) {
715 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
716 }
717 return 0;
718 }
719
720 AVCodec *avcodec_find_encoder(enum CodecID id)
721 {
722 AVCodec *p;
723 p = first_avcodec;
724 while (p) {
725 if (p->encode != NULL && p->id == id)
726 return p;
727 p = p->next;
728 }
729 return NULL;
730 }
731
732 AVCodec *avcodec_find_encoder_by_name(const char *name)
733 {
734 AVCodec *p;
735 if (!name)
736 return NULL;
737 p = first_avcodec;
738 while (p) {
739 if (p->encode != NULL && strcmp(name,p->name) == 0)
740 return p;
741 p = p->next;
742 }
743 return NULL;
744 }
745
746 AVCodec *avcodec_find_decoder(enum CodecID id)
747 {
748 AVCodec *p;
749 p = first_avcodec;
750 while (p) {
751 if (p->decode != NULL && p->id == id)
752 return p;
753 p = p->next;
754 }
755 return NULL;
756 }
757
758 AVCodec *avcodec_find_decoder_by_name(const char *name)
759 {
760 AVCodec *p;
761 if (!name)
762 return NULL;
763 p = first_avcodec;
764 while (p) {
765 if (p->decode != NULL && strcmp(name,p->name) == 0)
766 return p;
767 p = p->next;
768 }
769 return NULL;
770 }
771
772 static int get_bit_rate(AVCodecContext *ctx)
773 {
774 int bit_rate;
775 int bits_per_sample;
776
777 switch(ctx->codec_type) {
778 case AVMEDIA_TYPE_VIDEO:
779 bit_rate = ctx->bit_rate;
780 break;
781 case AVMEDIA_TYPE_AUDIO:
782 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
783 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
784 break;
785 case AVMEDIA_TYPE_DATA:
786 bit_rate = ctx->bit_rate;
787 break;
788 case AVMEDIA_TYPE_SUBTITLE:
789 bit_rate = ctx->bit_rate;
790 break;
791 case AVMEDIA_TYPE_ATTACHMENT:
792 bit_rate = ctx->bit_rate;
793 break;
794 default:
795 bit_rate = 0;
796 break;
797 }
798 return bit_rate;
799 }
800
801 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
802 {
803 const char *codec_name;
804 AVCodec *p;
805 char buf1[32];
806 int bitrate;
807 AVRational display_aspect_ratio;
808
809 if (encode)
810 p = avcodec_find_encoder(enc->codec_id);
811 else
812 p = avcodec_find_decoder(enc->codec_id);
813
814 if (p) {
815 codec_name = p->name;
816 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
817 /* fake mpeg2 transport stream codec (currently not
818 registered) */
819 codec_name = "mpeg2ts";
820 } else if (enc->codec_name[0] != '\0') {
821 codec_name = enc->codec_name;
822 } else {
823 /* output avi tags */
824 if( isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
825 && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
826 snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
827 enc->codec_tag & 0xff,
828 (enc->codec_tag >> 8) & 0xff,
829 (enc->codec_tag >> 16) & 0xff,
830 (enc->codec_tag >> 24) & 0xff,
831 enc->codec_tag);
832 } else {
833 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
834 }
835 codec_name = buf1;
836 }
837
838 switch(enc->codec_type) {
839 case AVMEDIA_TYPE_VIDEO:
840 snprintf(buf, buf_size,
841 "Video: %s%s",
842 codec_name, enc->mb_decision ? " (hq)" : "");
843 if (enc->pix_fmt != PIX_FMT_NONE) {
844 snprintf(buf + strlen(buf), buf_size - strlen(buf),
845 ", %s",
846 avcodec_get_pix_fmt_name(enc->pix_fmt));
847 }
848 if (enc->width) {
849 snprintf(buf + strlen(buf), buf_size - strlen(buf),
850 ", %dx%d",
851 enc->width, enc->height);
852 if (enc->sample_aspect_ratio.num) {
853 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
854 enc->width*enc->sample_aspect_ratio.num,
855 enc->height*enc->sample_aspect_ratio.den,
856 1024*1024);
857 snprintf(buf + strlen(buf), buf_size - strlen(buf),
858 " [PAR %d:%d DAR %d:%d]",
859 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
860 display_aspect_ratio.num, display_aspect_ratio.den);
861 }
862 if(av_log_get_level() >= AV_LOG_DEBUG){
863 int g= av_gcd(enc->time_base.num, enc->time_base.den);
864 snprintf(buf + strlen(buf), buf_size - strlen(buf),
865 ", %d/%d",
866 enc->time_base.num/g, enc->time_base.den/g);
867 }
868 }
869 if (encode) {
870 snprintf(buf + strlen(buf), buf_size - strlen(buf),
871 ", q=%d-%d", enc->qmin, enc->qmax);
872 }
873 break;
874 case AVMEDIA_TYPE_AUDIO:
875 snprintf(buf, buf_size,
876 "Audio: %s",
877 codec_name);
878 if (enc->sample_rate) {
879 snprintf(buf + strlen(buf), buf_size - strlen(buf),
880 ", %d Hz", enc->sample_rate);
881 }
882 av_strlcat(buf, ", ", buf_size);
883 avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
884 if (enc->sample_fmt != SAMPLE_FMT_NONE) {
885 snprintf(buf + strlen(buf), buf_size - strlen(buf),
886 ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
887 }
888 break;
889 case AVMEDIA_TYPE_DATA:
890 snprintf(buf, buf_size, "Data: %s", codec_name);
891 break;
892 case AVMEDIA_TYPE_SUBTITLE:
893 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
894 break;
895 case AVMEDIA_TYPE_ATTACHMENT:
896 snprintf(buf, buf_size, "Attachment: %s", codec_name);
897 break;
898 default:
899 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
900 return;
901 }
902 if (encode) {
903 if (enc->flags & CODEC_FLAG_PASS1)
904 snprintf(buf + strlen(buf), buf_size - strlen(buf),
905 ", pass 1");
906 if (enc->flags & CODEC_FLAG_PASS2)
907 snprintf(buf + strlen(buf), buf_size - strlen(buf),
908 ", pass 2");
909 }
910 bitrate = get_bit_rate(enc);
911 if (bitrate != 0) {
912 snprintf(buf + strlen(buf), buf_size - strlen(buf),
913 ", %d kb/s", bitrate / 1000);
914 }
915 }
916
917 unsigned avcodec_version( void )
918 {
919 return LIBAVCODEC_VERSION_INT;
920 }
921
922 const char *avcodec_configuration(void)
923 {
924 return FFMPEG_CONFIGURATION;
925 }
926
927 const char *avcodec_license(void)
928 {
929 #define LICENSE_PREFIX "libavcodec license: "
930 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
931 }
932
933 void avcodec_init(void)
934 {
935 static int initialized = 0;
936
937 if (initialized != 0)
938 return;
939 initialized = 1;
940
941 dsputil_static_init();
942 }
943
944 void avcodec_flush_buffers(AVCodecContext *avctx)
945 {
946 if(avctx->codec->flush)
947 avctx->codec->flush(avctx);
948 }
949
950 void avcodec_default_free_buffers(AVCodecContext *s){
951 int i, j;
952
953 if(s->internal_buffer==NULL) return;
954
955 if (s->internal_buffer_count)
956 av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
957 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
958 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
959 for(j=0; j<4; j++){
960 av_freep(&buf->base[j]);
961 buf->data[j]= NULL;
962 }
963 }
964 av_freep(&s->internal_buffer);
965
966 s->internal_buffer_count=0;
967 }
968
969 char av_get_pict_type_char(int pict_type){
970 switch(pict_type){
971 case FF_I_TYPE: return 'I';
972 case FF_P_TYPE: return 'P';
973 case FF_B_TYPE: return 'B';
974 case FF_S_TYPE: return 'S';
975 case FF_SI_TYPE:return 'i';
976 case FF_SP_TYPE:return 'p';
977 case FF_BI_TYPE:return 'b';
978 default: return '?';
979 }
980 }
981
982 int av_get_bits_per_sample(enum CodecID codec_id){
983 switch(codec_id){
984 case CODEC_ID_ADPCM_SBPRO_2:
985 return 2;
986 case CODEC_ID_ADPCM_SBPRO_3:
987 return 3;
988 case CODEC_ID_ADPCM_SBPRO_4:
989 case CODEC_ID_ADPCM_CT:
990 case CODEC_ID_ADPCM_IMA_WAV:
991 case CODEC_ID_ADPCM_MS:
992 case CODEC_ID_ADPCM_YAMAHA:
993 return 4;
994 case CODEC_ID_PCM_ALAW:
995 case CODEC_ID_PCM_MULAW:
996 case CODEC_ID_PCM_S8:
997 case CODEC_ID_PCM_U8:
998 case CODEC_ID_PCM_ZORK:
999 return 8;
1000 case CODEC_ID_PCM_S16BE:
1001 case CODEC_ID_PCM_S16LE:
1002 case CODEC_ID_PCM_S16LE_PLANAR:
1003 case CODEC_ID_PCM_U16BE:
1004 case CODEC_ID_PCM_U16LE:
1005 return 16;
1006 case CODEC_ID_PCM_S24DAUD:
1007 case CODEC_ID_PCM_S24BE:
1008 case CODEC_ID_PCM_S24LE:
1009 case CODEC_ID_PCM_U24BE:
1010 case CODEC_ID_PCM_U24LE:
1011 return 24;
1012 case CODEC_ID_PCM_S32BE:
1013 case CODEC_ID_PCM_S32LE:
1014 case CODEC_ID_PCM_U32BE:
1015 case CODEC_ID_PCM_U32LE:
1016 case CODEC_ID_PCM_F32BE:
1017 case CODEC_ID_PCM_F32LE:
1018 return 32;
1019 case CODEC_ID_PCM_F64BE:
1020 case CODEC_ID_PCM_F64LE:
1021 return 64;
1022 default:
1023 return 0;
1024 }
1025 }
1026
1027 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
1028 switch (sample_fmt) {
1029 case SAMPLE_FMT_U8:
1030 return 8;
1031 case SAMPLE_FMT_S16:
1032 return 16;
1033 case SAMPLE_FMT_S32:
1034 case SAMPLE_FMT_FLT:
1035 return 32;
1036 case SAMPLE_FMT_DBL:
1037 return 64;
1038 default:
1039 return 0;
1040 }
1041 }
1042
1043 #if !HAVE_THREADS
1044 int avcodec_thread_init(AVCodecContext *s, int thread_count){
1045 s->thread_count = thread_count;
1046 return -1;
1047 }
1048 #endif
1049
1050 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1051 {
1052 unsigned int n = 0;
1053
1054 while(v >= 0xff) {
1055 *s++ = 0xff;
1056 v -= 0xff;
1057 n++;
1058 }
1059 *s = v;
1060 n++;
1061 return n;
1062 }
1063
1064 /* Wrapper to work around the lack of mkstemp() on mingw/cygin.
1065 * Also, tries to create file in /tmp first, if possible.
1066 * *prefix can be a character constant; *filename will be allocated internally.
1067 * Returns file descriptor of opened file (or -1 on error)
1068 * and opened file name in **filename. */
1069 int av_tempfile(char *prefix, char **filename) {
1070 int fd=-1;
1071 #if !HAVE_MKSTEMP
1072 *filename = tempnam(".", prefix);
1073 #else
1074 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
1075 *filename = av_malloc(len);
1076 #endif
1077 /* -----common section-----*/
1078 if (*filename == NULL) {
1079 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
1080 return -1;
1081 }
1082 #if !HAVE_MKSTEMP
1083 fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
1084 #else
1085 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
1086 fd = mkstemp(*filename);
1087 if (fd < 0) {
1088 snprintf(*filename, len, "./%sXXXXXX", prefix);
1089 fd = mkstemp(*filename);
1090 }
1091 #endif
1092 /* -----common section-----*/
1093 if (fd < 0) {
1094 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
1095 return -1;
1096 }
1097 return fd; /* success */
1098 }
1099
1100 typedef struct {
1101 const char *abbr;
1102 int width, height;
1103 } VideoFrameSizeAbbr;
1104
1105 typedef struct {
1106 const char *abbr;
1107 int rate_num, rate_den;
1108 } VideoFrameRateAbbr;
1109
1110 static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
1111 { "ntsc", 720, 480 },
1112 { "pal", 720, 576 },
1113 { "qntsc", 352, 240 }, /* VCD compliant NTSC */
1114 { "qpal", 352, 288 }, /* VCD compliant PAL */
1115 { "sntsc", 640, 480 }, /* square pixel NTSC */
1116 { "spal", 768, 576 }, /* square pixel PAL */
1117 { "film", 352, 240 },
1118 { "ntsc-film", 352, 240 },
1119 { "sqcif", 128, 96 },
1120 { "qcif", 176, 144 },
1121 { "cif", 352, 288 },
1122 { "4cif", 704, 576 },
1123 { "16cif", 1408,1152 },
1124 { "qqvga", 160, 120 },
1125 { "qvga", 320, 240 },
1126 { "vga", 640, 480 },
1127 { "svga", 800, 600 },
1128 { "xga", 1024, 768 },
1129 { "uxga", 1600,1200 },
1130 { "qxga", 2048,1536 },
1131 { "sxga", 1280,1024 },
1132 { "qsxga", 2560,2048 },
1133 { "hsxga", 5120,4096 },
1134 { "wvga", 852, 480 },
1135 { "wxga", 1366, 768 },
1136 { "wsxga", 1600,1024 },
1137 { "wuxga", 1920,1200 },
1138 { "woxga", 2560,1600 },
1139 { "wqsxga", 3200,2048 },
1140 { "wquxga", 3840,2400 },
1141 { "whsxga", 6400,4096 },
1142 { "whuxga", 7680,4800 },
1143 { "cga", 320, 200 },
1144 { "ega", 640, 350 },
1145 { "hd480", 852, 480 },
1146 { "hd720", 1280, 720 },
1147 { "hd1080", 1920,1080 },
1148 };
1149
1150 static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1151 { "ntsc", 30000, 1001 },
1152 { "pal", 25, 1 },
1153 { "qntsc", 30000, 1001 }, /* VCD compliant NTSC */
1154 { "qpal", 25, 1 }, /* VCD compliant PAL */
1155 { "sntsc", 30000, 1001 }, /* square pixel NTSC */
1156 { "spal", 25, 1 }, /* square pixel PAL */
1157 { "film", 24, 1 },
1158 { "ntsc-film", 24000, 1001 },
1159 };
1160
1161 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1162 {
1163 int i;
1164 int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1165 char *p;
1166 int frame_width = 0, frame_height = 0;
1167
1168 for(i=0;i<n;i++) {
1169 if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1170 frame_width = video_frame_size_abbrs[i].width;
1171 frame_height = video_frame_size_abbrs[i].height;
1172 break;
1173 }
1174 }
1175 if (i == n) {
1176 p = str;
1177 frame_width = strtol(p, &p, 10);
1178 if (*p)
1179 p++;
1180 frame_height = strtol(p, &p, 10);
1181 }
1182 if (frame_width <= 0 || frame_height <= 0)
1183 return -1;
1184 *width_ptr = frame_width;
1185 *height_ptr = frame_height;
1186 return 0;
1187 }
1188
1189 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1190 {
1191 int i;
1192 int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1193 char* cp;
1194
1195 /* First, we check our abbreviation table */
1196 for (i = 0; i < n; ++i)
1197 if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1198 frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1199 frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1200 return 0;
1201 }
1202
1203 /* Then, we try to parse it as fraction */
1204 cp = strchr(arg, '/');
1205 if (!cp)
1206 cp = strchr(arg, ':');
1207 if (cp) {
1208 char* cpp;
1209 frame_rate->num = strtol(arg, &cpp, 10);
1210 if (cpp != arg || cpp == cp)
1211 frame_rate->den = strtol(cp+1, &cpp, 10);
1212 else
1213 frame_rate->num = 0;
1214 }
1215 else {
1216 /* Finally we give up and parse it as double */
1217 AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1218 frame_rate->den = time_base.den;
1219 frame_rate->num = time_base.num;
1220 }
1221 if (!frame_rate->num || !frame_rate->den)
1222 return -1;
1223 else
1224 return 0;
1225 }
1226
1227 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1228 int i;
1229 for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1230 return i;
1231 }
1232
1233 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1234 {
1235 av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1236 "version to the newest one from SVN. If the problem still "
1237 "occurs, it means that your file has a feature which has not "
1238 "been implemented.", feature);
1239 if(want_sample)
1240 av_log_ask_for_sample(avc, NULL);
1241 else
1242 av_log(avc, AV_LOG_WARNING, "\n");
1243 }
1244
1245 void av_log_ask_for_sample(void *avc, const char *msg)
1246 {
1247 if (msg)
1248 av_log(avc, AV_LOG_WARNING, "%s ", msg);
1249 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1250 "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1251 "and contact the ffmpeg-devel mailing list.\n");
1252 }
1253
1254 static AVHWAccel *first_hwaccel = NULL;
1255
1256 void av_register_hwaccel(AVHWAccel *hwaccel)
1257 {
1258 AVHWAccel **p = &first_hwaccel;
1259 while (*p)
1260 p = &(*p)->next;
1261 *p = hwaccel;
1262 hwaccel->next = NULL;
1263 }
1264
1265 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1266 {
1267 return hwaccel ? hwaccel->next : first_hwaccel;
1268 }
1269
1270 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1271 {
1272 AVHWAccel *hwaccel=NULL;
1273
1274 while((hwaccel= av_hwaccel_next(hwaccel))){
1275 if ( hwaccel->id == codec_id
1276 && hwaccel->pix_fmt == pix_fmt)
1277 return hwaccel;
1278 }
1279 return NULL;
1280 }
1281
1282 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1283 {
1284 if (ff_lockmgr_cb) {
1285 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1286 return -1;
1287 }
1288
1289 ff_lockmgr_cb = cb;
1290
1291 if (ff_lockmgr_cb) {
1292 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1293 return -1;
1294 }
1295 return 0;
1296 }