Fix segfault when encoder initialization fails.
[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 unsigned avcodec_get_edge_width(void)
105 {
106 return EDGE_WIDTH;
107 }
108
109 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
110 s->coded_width = width;
111 s->coded_height= height;
112 s->width = -((-width )>>s->lowres);
113 s->height= -((-height)>>s->lowres);
114 }
115
116 typedef struct InternalBuffer{
117 int last_pic_num;
118 uint8_t *base[4];
119 uint8_t *data[4];
120 int linesize[4];
121 int width, height;
122 enum PixelFormat pix_fmt;
123 }InternalBuffer;
124
125 #define INTERNAL_BUFFER_SIZE 32
126
127 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
128 int w_align= 1;
129 int h_align= 1;
130
131 switch(s->pix_fmt){
132 case PIX_FMT_YUV420P:
133 case PIX_FMT_YUYV422:
134 case PIX_FMT_UYVY422:
135 case PIX_FMT_YUV422P:
136 case PIX_FMT_YUV440P:
137 case PIX_FMT_YUV444P:
138 case PIX_FMT_GRAY8:
139 case PIX_FMT_GRAY16BE:
140 case PIX_FMT_GRAY16LE:
141 case PIX_FMT_YUVJ420P:
142 case PIX_FMT_YUVJ422P:
143 case PIX_FMT_YUVJ440P:
144 case PIX_FMT_YUVJ444P:
145 case PIX_FMT_YUVA420P:
146 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
147 h_align= 16;
148 if(s->codec_id == CODEC_ID_MPEG2VIDEO || s->codec_id == CODEC_ID_MJPEG || s->codec_id == CODEC_ID_AMV || s->codec_id == CODEC_ID_THP)
149 h_align= 32; // interlaced is rounded up to 2 MBs
150 break;
151 case PIX_FMT_YUV411P:
152 case PIX_FMT_UYYVYY411:
153 w_align=32;
154 h_align=8;
155 break;
156 case PIX_FMT_YUV410P:
157 if(s->codec_id == CODEC_ID_SVQ1){
158 w_align=64;
159 h_align=64;
160 }
161 case PIX_FMT_RGB555:
162 if(s->codec_id == CODEC_ID_RPZA){
163 w_align=4;
164 h_align=4;
165 }
166 case PIX_FMT_PAL8:
167 case PIX_FMT_BGR8:
168 case PIX_FMT_RGB8:
169 if(s->codec_id == CODEC_ID_SMC){
170 w_align=4;
171 h_align=4;
172 }
173 break;
174 case PIX_FMT_BGR24:
175 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
176 w_align=4;
177 h_align=4;
178 }
179 break;
180 default:
181 w_align= 1;
182 h_align= 1;
183 break;
184 }
185
186 *width = FFALIGN(*width , w_align);
187 *height= FFALIGN(*height, h_align);
188 if(s->codec_id == CODEC_ID_H264)
189 *height+=2; // some of the optimized chroma MC reads one line too much
190
191 linesize_align[0] =
192 linesize_align[1] =
193 linesize_align[2] =
194 linesize_align[3] = STRIDE_ALIGN;
195 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
196 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
197 //picture size unneccessarily in some cases. The solution here is not
198 //pretty and better ideas are welcome!
199 #if HAVE_MMX
200 if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
201 s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
202 s->codec_id == CODEC_ID_VP6A) {
203 linesize_align[0] =
204 linesize_align[1] =
205 linesize_align[2] = 16;
206 }
207 #endif
208 }
209
210 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
211 int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
212 int linesize_align[4];
213 int align;
214 avcodec_align_dimensions2(s, width, height, linesize_align);
215 align = FFMAX(linesize_align[0], linesize_align[3]);
216 linesize_align[1] <<= chroma_shift;
217 linesize_align[2] <<= chroma_shift;
218 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
219 *width=FFALIGN(*width, align);
220 }
221
222 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
223 if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
224 return 0;
225
226 av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
227 return -1;
228 }
229
230 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
231 int i;
232 int w= s->width;
233 int h= s->height;
234 InternalBuffer *buf;
235 int *picture_number;
236
237 if(pic->data[0]!=NULL) {
238 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
239 return -1;
240 }
241 if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
242 av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
243 return -1;
244 }
245
246 if(avcodec_check_dimensions(s,w,h))
247 return -1;
248
249 if(s->internal_buffer==NULL){
250 s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
251 }
252 #if 0
253 s->internal_buffer= av_fast_realloc(
254 s->internal_buffer,
255 &s->internal_buffer_size,
256 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
257 );
258 #endif
259
260 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
261 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
262 (*picture_number)++;
263
264 if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
265 for(i=0; i<4; i++){
266 av_freep(&buf->base[i]);
267 buf->data[i]= NULL;
268 }
269 }
270
271 if(buf->base[0]){
272 pic->age= *picture_number - buf->last_pic_num;
273 buf->last_pic_num= *picture_number;
274 }else{
275 int h_chroma_shift, v_chroma_shift;
276 int size[4] = {0};
277 int tmpsize;
278 int unaligned;
279 AVPicture picture;
280 int stride_align[4];
281
282 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
283
284 avcodec_align_dimensions2(s, &w, &h, stride_align);
285
286 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
287 w+= EDGE_WIDTH*2;
288 h+= EDGE_WIDTH*2;
289 }
290
291 do {
292 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
293 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
294 ff_fill_linesize(&picture, s->pix_fmt, w);
295 // increase alignment of w for next try (rhs gives the lowest bit set in w)
296 w += w & ~(w-1);
297
298 unaligned = 0;
299 for (i=0; i<4; i++){
300 unaligned |= picture.linesize[i] % stride_align[i];
301 }
302 } while (unaligned);
303
304 tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
305 if (tmpsize < 0)
306 return -1;
307
308 for (i=0; i<3 && picture.data[i+1]; i++)
309 size[i] = picture.data[i+1] - picture.data[i];
310 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
311
312 buf->last_pic_num= -256*256*256*64;
313 memset(buf->base, 0, sizeof(buf->base));
314 memset(buf->data, 0, sizeof(buf->data));
315
316 for(i=0; i<4 && size[i]; i++){
317 const int h_shift= i==0 ? 0 : h_chroma_shift;
318 const int v_shift= i==0 ? 0 : v_chroma_shift;
319
320 buf->linesize[i]= picture.linesize[i];
321
322 buf->base[i]= av_malloc(size[i]+16); //FIXME 16
323 if(buf->base[i]==NULL) return -1;
324 memset(buf->base[i], 128, size[i]);
325
326 // no edge if EDEG EMU or not planar YUV
327 if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
328 buf->data[i] = buf->base[i];
329 else
330 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
331 }
332 if(size[1] && !size[2])
333 ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
334 buf->width = s->width;
335 buf->height = s->height;
336 buf->pix_fmt= s->pix_fmt;
337 pic->age= 256*256*256*64;
338 }
339 pic->type= FF_BUFFER_TYPE_INTERNAL;
340
341 for(i=0; i<4; i++){
342 pic->base[i]= buf->base[i];
343 pic->data[i]= buf->data[i];
344 pic->linesize[i]= buf->linesize[i];
345 }
346 s->internal_buffer_count++;
347
348 pic->reordered_opaque= s->reordered_opaque;
349
350 if(s->debug&FF_DEBUG_BUFFERS)
351 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
352
353 return 0;
354 }
355
356 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
357 int i;
358 InternalBuffer *buf, *last;
359
360 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
361 assert(s->internal_buffer_count);
362
363 buf = NULL; /* avoids warning */
364 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
365 buf= &((InternalBuffer*)s->internal_buffer)[i];
366 if(buf->data[0] == pic->data[0])
367 break;
368 }
369 assert(i < s->internal_buffer_count);
370 s->internal_buffer_count--;
371 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
372
373 FFSWAP(InternalBuffer, *buf, *last);
374
375 for(i=0; i<4; i++){
376 pic->data[i]=NULL;
377 // pic->base[i]=NULL;
378 }
379 //printf("R%X\n", pic->opaque);
380
381 if(s->debug&FF_DEBUG_BUFFERS)
382 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
383 }
384
385 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
386 AVFrame temp_pic;
387 int i;
388
389 /* If no picture return a new buffer */
390 if(pic->data[0] == NULL) {
391 /* We will copy from buffer, so must be readable */
392 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
393 return s->get_buffer(s, pic);
394 }
395
396 /* If internal buffer type return the same buffer */
397 if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
398 pic->reordered_opaque= s->reordered_opaque;
399 return 0;
400 }
401
402 /*
403 * Not internal type and reget_buffer not overridden, emulate cr buffer
404 */
405 temp_pic = *pic;
406 for(i = 0; i < 4; i++)
407 pic->data[i] = pic->base[i] = NULL;
408 pic->opaque = NULL;
409 /* Allocate new frame */
410 if (s->get_buffer(s, pic))
411 return -1;
412 /* Copy image data from old buffer to new buffer */
413 av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
414 s->height);
415 s->release_buffer(s, &temp_pic); // Release old frame
416 return 0;
417 }
418
419 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
420 int i;
421
422 for(i=0; i<count; i++){
423 int r= func(c, (char*)arg + i*size);
424 if(ret) ret[i]= r;
425 }
426 return 0;
427 }
428
429 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
430 int i;
431
432 for(i=0; i<count; i++){
433 int r= func(c, arg, i, 0);
434 if(ret) ret[i]= r;
435 }
436 return 0;
437 }
438
439 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
440 while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
441 ++fmt;
442 return fmt[0];
443 }
444
445 void avcodec_get_frame_defaults(AVFrame *pic){
446 memset(pic, 0, sizeof(AVFrame));
447
448 pic->pts= AV_NOPTS_VALUE;
449 pic->key_frame= 1;
450 }
451
452 AVFrame *avcodec_alloc_frame(void){
453 AVFrame *pic= av_malloc(sizeof(AVFrame));
454
455 if(pic==NULL) return NULL;
456
457 avcodec_get_frame_defaults(pic);
458
459 return pic;
460 }
461
462 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
463 {
464 int ret= -1;
465
466 /* If there is a user-supplied mutex locking routine, call it. */
467 if (ff_lockmgr_cb) {
468 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
469 return -1;
470 }
471
472 entangled_thread_counter++;
473 if(entangled_thread_counter != 1){
474 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
475 goto end;
476 }
477
478 if(avctx->codec || !codec)
479 goto end;
480
481 if (codec->priv_data_size > 0) {
482 avctx->priv_data = av_mallocz(codec->priv_data_size);
483 if (!avctx->priv_data) {
484 ret = AVERROR(ENOMEM);
485 goto end;
486 }
487 } else {
488 avctx->priv_data = NULL;
489 }
490
491 if(avctx->coded_width && avctx->coded_height)
492 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
493 else if(avctx->width && avctx->height)
494 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
495
496 #define SANE_NB_CHANNELS 128U
497 if (((avctx->coded_width || avctx->coded_height)
498 && avcodec_check_dimensions(avctx, avctx->coded_width, avctx->coded_height))
499 || avctx->channels > SANE_NB_CHANNELS) {
500 ret = AVERROR(EINVAL);
501 goto free_and_end;
502 }
503
504 avctx->codec = codec;
505 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
506 avctx->codec_id == CODEC_ID_NONE) {
507 avctx->codec_type = codec->type;
508 avctx->codec_id = codec->id;
509 }
510 if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
511 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
512 goto free_and_end;
513 }
514 avctx->frame_number = 0;
515 if(avctx->codec->init){
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 av_cold int avcodec_close(AVCodecContext *avctx)
693 {
694 /* If there is a user-supplied mutex locking routine, call it. */
695 if (ff_lockmgr_cb) {
696 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
697 return -1;
698 }
699
700 entangled_thread_counter++;
701 if(entangled_thread_counter != 1){
702 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
703 entangled_thread_counter--;
704 return -1;
705 }
706
707 if (HAVE_THREADS && avctx->thread_opaque)
708 avcodec_thread_free(avctx);
709 if (avctx->codec && avctx->codec->close)
710 avctx->codec->close(avctx);
711 avcodec_default_free_buffers(avctx);
712 av_freep(&avctx->priv_data);
713 if(avctx->codec && avctx->codec->encode)
714 av_freep(&avctx->extradata);
715 avctx->codec = NULL;
716 entangled_thread_counter--;
717
718 /* Release any user-supplied mutex. */
719 if (ff_lockmgr_cb) {
720 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
721 }
722 return 0;
723 }
724
725 AVCodec *avcodec_find_encoder(enum CodecID id)
726 {
727 AVCodec *p;
728 p = first_avcodec;
729 while (p) {
730 if (p->encode != NULL && p->id == id)
731 return p;
732 p = p->next;
733 }
734 return NULL;
735 }
736
737 AVCodec *avcodec_find_encoder_by_name(const char *name)
738 {
739 AVCodec *p;
740 if (!name)
741 return NULL;
742 p = first_avcodec;
743 while (p) {
744 if (p->encode != NULL && strcmp(name,p->name) == 0)
745 return p;
746 p = p->next;
747 }
748 return NULL;
749 }
750
751 AVCodec *avcodec_find_decoder(enum CodecID id)
752 {
753 AVCodec *p;
754 p = first_avcodec;
755 while (p) {
756 if (p->decode != NULL && p->id == id)
757 return p;
758 p = p->next;
759 }
760 return NULL;
761 }
762
763 AVCodec *avcodec_find_decoder_by_name(const char *name)
764 {
765 AVCodec *p;
766 if (!name)
767 return NULL;
768 p = first_avcodec;
769 while (p) {
770 if (p->decode != NULL && strcmp(name,p->name) == 0)
771 return p;
772 p = p->next;
773 }
774 return NULL;
775 }
776
777 static int get_bit_rate(AVCodecContext *ctx)
778 {
779 int bit_rate;
780 int bits_per_sample;
781
782 switch(ctx->codec_type) {
783 case AVMEDIA_TYPE_VIDEO:
784 bit_rate = ctx->bit_rate;
785 break;
786 case AVMEDIA_TYPE_AUDIO:
787 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
788 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
789 break;
790 case AVMEDIA_TYPE_DATA:
791 bit_rate = ctx->bit_rate;
792 break;
793 case AVMEDIA_TYPE_SUBTITLE:
794 bit_rate = ctx->bit_rate;
795 break;
796 case AVMEDIA_TYPE_ATTACHMENT:
797 bit_rate = ctx->bit_rate;
798 break;
799 default:
800 bit_rate = 0;
801 break;
802 }
803 return bit_rate;
804 }
805
806 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
807 {
808 const char *codec_name;
809 AVCodec *p;
810 char buf1[32];
811 int bitrate;
812 AVRational display_aspect_ratio;
813
814 if (encode)
815 p = avcodec_find_encoder(enc->codec_id);
816 else
817 p = avcodec_find_decoder(enc->codec_id);
818
819 if (p) {
820 codec_name = p->name;
821 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
822 /* fake mpeg2 transport stream codec (currently not
823 registered) */
824 codec_name = "mpeg2ts";
825 } else if (enc->codec_name[0] != '\0') {
826 codec_name = enc->codec_name;
827 } else {
828 /* output avi tags */
829 if( isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
830 && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
831 snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
832 enc->codec_tag & 0xff,
833 (enc->codec_tag >> 8) & 0xff,
834 (enc->codec_tag >> 16) & 0xff,
835 (enc->codec_tag >> 24) & 0xff,
836 enc->codec_tag);
837 } else {
838 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
839 }
840 codec_name = buf1;
841 }
842
843 switch(enc->codec_type) {
844 case AVMEDIA_TYPE_VIDEO:
845 snprintf(buf, buf_size,
846 "Video: %s%s",
847 codec_name, enc->mb_decision ? " (hq)" : "");
848 if (enc->pix_fmt != PIX_FMT_NONE) {
849 snprintf(buf + strlen(buf), buf_size - strlen(buf),
850 ", %s",
851 avcodec_get_pix_fmt_name(enc->pix_fmt));
852 }
853 if (enc->width) {
854 snprintf(buf + strlen(buf), buf_size - strlen(buf),
855 ", %dx%d",
856 enc->width, enc->height);
857 if (enc->sample_aspect_ratio.num) {
858 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
859 enc->width*enc->sample_aspect_ratio.num,
860 enc->height*enc->sample_aspect_ratio.den,
861 1024*1024);
862 snprintf(buf + strlen(buf), buf_size - strlen(buf),
863 " [PAR %d:%d DAR %d:%d]",
864 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
865 display_aspect_ratio.num, display_aspect_ratio.den);
866 }
867 if(av_log_get_level() >= AV_LOG_DEBUG){
868 int g= av_gcd(enc->time_base.num, enc->time_base.den);
869 snprintf(buf + strlen(buf), buf_size - strlen(buf),
870 ", %d/%d",
871 enc->time_base.num/g, enc->time_base.den/g);
872 }
873 }
874 if (encode) {
875 snprintf(buf + strlen(buf), buf_size - strlen(buf),
876 ", q=%d-%d", enc->qmin, enc->qmax);
877 }
878 break;
879 case AVMEDIA_TYPE_AUDIO:
880 snprintf(buf, buf_size,
881 "Audio: %s",
882 codec_name);
883 if (enc->sample_rate) {
884 snprintf(buf + strlen(buf), buf_size - strlen(buf),
885 ", %d Hz", enc->sample_rate);
886 }
887 av_strlcat(buf, ", ", buf_size);
888 avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
889 if (enc->sample_fmt != SAMPLE_FMT_NONE) {
890 snprintf(buf + strlen(buf), buf_size - strlen(buf),
891 ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
892 }
893 break;
894 case AVMEDIA_TYPE_DATA:
895 snprintf(buf, buf_size, "Data: %s", codec_name);
896 break;
897 case AVMEDIA_TYPE_SUBTITLE:
898 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
899 break;
900 case AVMEDIA_TYPE_ATTACHMENT:
901 snprintf(buf, buf_size, "Attachment: %s", codec_name);
902 break;
903 default:
904 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
905 return;
906 }
907 if (encode) {
908 if (enc->flags & CODEC_FLAG_PASS1)
909 snprintf(buf + strlen(buf), buf_size - strlen(buf),
910 ", pass 1");
911 if (enc->flags & CODEC_FLAG_PASS2)
912 snprintf(buf + strlen(buf), buf_size - strlen(buf),
913 ", pass 2");
914 }
915 bitrate = get_bit_rate(enc);
916 if (bitrate != 0) {
917 snprintf(buf + strlen(buf), buf_size - strlen(buf),
918 ", %d kb/s", bitrate / 1000);
919 }
920 }
921
922 unsigned avcodec_version( void )
923 {
924 return LIBAVCODEC_VERSION_INT;
925 }
926
927 const char *avcodec_configuration(void)
928 {
929 return FFMPEG_CONFIGURATION;
930 }
931
932 const char *avcodec_license(void)
933 {
934 #define LICENSE_PREFIX "libavcodec license: "
935 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
936 }
937
938 void avcodec_init(void)
939 {
940 static int initialized = 0;
941
942 if (initialized != 0)
943 return;
944 initialized = 1;
945
946 dsputil_static_init();
947 }
948
949 void avcodec_flush_buffers(AVCodecContext *avctx)
950 {
951 if(avctx->codec->flush)
952 avctx->codec->flush(avctx);
953 }
954
955 void avcodec_default_free_buffers(AVCodecContext *s){
956 int i, j;
957
958 if(s->internal_buffer==NULL) return;
959
960 if (s->internal_buffer_count)
961 av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
962 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
963 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
964 for(j=0; j<4; j++){
965 av_freep(&buf->base[j]);
966 buf->data[j]= NULL;
967 }
968 }
969 av_freep(&s->internal_buffer);
970
971 s->internal_buffer_count=0;
972 }
973
974 char av_get_pict_type_char(int pict_type){
975 switch(pict_type){
976 case FF_I_TYPE: return 'I';
977 case FF_P_TYPE: return 'P';
978 case FF_B_TYPE: return 'B';
979 case FF_S_TYPE: return 'S';
980 case FF_SI_TYPE:return 'i';
981 case FF_SP_TYPE:return 'p';
982 case FF_BI_TYPE:return 'b';
983 default: return '?';
984 }
985 }
986
987 int av_get_bits_per_sample(enum CodecID codec_id){
988 switch(codec_id){
989 case CODEC_ID_ADPCM_SBPRO_2:
990 return 2;
991 case CODEC_ID_ADPCM_SBPRO_3:
992 return 3;
993 case CODEC_ID_ADPCM_SBPRO_4:
994 case CODEC_ID_ADPCM_CT:
995 case CODEC_ID_ADPCM_IMA_WAV:
996 case CODEC_ID_ADPCM_MS:
997 case CODEC_ID_ADPCM_YAMAHA:
998 return 4;
999 case CODEC_ID_PCM_ALAW:
1000 case CODEC_ID_PCM_MULAW:
1001 case CODEC_ID_PCM_S8:
1002 case CODEC_ID_PCM_U8:
1003 case CODEC_ID_PCM_ZORK:
1004 return 8;
1005 case CODEC_ID_PCM_S16BE:
1006 case CODEC_ID_PCM_S16LE:
1007 case CODEC_ID_PCM_S16LE_PLANAR:
1008 case CODEC_ID_PCM_U16BE:
1009 case CODEC_ID_PCM_U16LE:
1010 return 16;
1011 case CODEC_ID_PCM_S24DAUD:
1012 case CODEC_ID_PCM_S24BE:
1013 case CODEC_ID_PCM_S24LE:
1014 case CODEC_ID_PCM_U24BE:
1015 case CODEC_ID_PCM_U24LE:
1016 return 24;
1017 case CODEC_ID_PCM_S32BE:
1018 case CODEC_ID_PCM_S32LE:
1019 case CODEC_ID_PCM_U32BE:
1020 case CODEC_ID_PCM_U32LE:
1021 case CODEC_ID_PCM_F32BE:
1022 case CODEC_ID_PCM_F32LE:
1023 return 32;
1024 case CODEC_ID_PCM_F64BE:
1025 case CODEC_ID_PCM_F64LE:
1026 return 64;
1027 default:
1028 return 0;
1029 }
1030 }
1031
1032 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
1033 switch (sample_fmt) {
1034 case SAMPLE_FMT_U8:
1035 return 8;
1036 case SAMPLE_FMT_S16:
1037 return 16;
1038 case SAMPLE_FMT_S32:
1039 case SAMPLE_FMT_FLT:
1040 return 32;
1041 case SAMPLE_FMT_DBL:
1042 return 64;
1043 default:
1044 return 0;
1045 }
1046 }
1047
1048 #if !HAVE_THREADS
1049 int avcodec_thread_init(AVCodecContext *s, int thread_count){
1050 s->thread_count = thread_count;
1051 return -1;
1052 }
1053 #endif
1054
1055 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1056 {
1057 unsigned int n = 0;
1058
1059 while(v >= 0xff) {
1060 *s++ = 0xff;
1061 v -= 0xff;
1062 n++;
1063 }
1064 *s = v;
1065 n++;
1066 return n;
1067 }
1068
1069 /* Wrapper to work around the lack of mkstemp() on mingw/cygin.
1070 * Also, tries to create file in /tmp first, if possible.
1071 * *prefix can be a character constant; *filename will be allocated internally.
1072 * Returns file descriptor of opened file (or -1 on error)
1073 * and opened file name in **filename. */
1074 int av_tempfile(char *prefix, char **filename) {
1075 int fd=-1;
1076 #if !HAVE_MKSTEMP
1077 *filename = tempnam(".", prefix);
1078 #else
1079 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
1080 *filename = av_malloc(len);
1081 #endif
1082 /* -----common section-----*/
1083 if (*filename == NULL) {
1084 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
1085 return -1;
1086 }
1087 #if !HAVE_MKSTEMP
1088 fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
1089 #else
1090 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
1091 fd = mkstemp(*filename);
1092 if (fd < 0) {
1093 snprintf(*filename, len, "./%sXXXXXX", prefix);
1094 fd = mkstemp(*filename);
1095 }
1096 #endif
1097 /* -----common section-----*/
1098 if (fd < 0) {
1099 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
1100 return -1;
1101 }
1102 return fd; /* success */
1103 }
1104
1105 typedef struct {
1106 const char *abbr;
1107 int width, height;
1108 } VideoFrameSizeAbbr;
1109
1110 typedef struct {
1111 const char *abbr;
1112 int rate_num, rate_den;
1113 } VideoFrameRateAbbr;
1114
1115 static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
1116 { "ntsc", 720, 480 },
1117 { "pal", 720, 576 },
1118 { "qntsc", 352, 240 }, /* VCD compliant NTSC */
1119 { "qpal", 352, 288 }, /* VCD compliant PAL */
1120 { "sntsc", 640, 480 }, /* square pixel NTSC */
1121 { "spal", 768, 576 }, /* square pixel PAL */
1122 { "film", 352, 240 },
1123 { "ntsc-film", 352, 240 },
1124 { "sqcif", 128, 96 },
1125 { "qcif", 176, 144 },
1126 { "cif", 352, 288 },
1127 { "4cif", 704, 576 },
1128 { "16cif", 1408,1152 },
1129 { "qqvga", 160, 120 },
1130 { "qvga", 320, 240 },
1131 { "vga", 640, 480 },
1132 { "svga", 800, 600 },
1133 { "xga", 1024, 768 },
1134 { "uxga", 1600,1200 },
1135 { "qxga", 2048,1536 },
1136 { "sxga", 1280,1024 },
1137 { "qsxga", 2560,2048 },
1138 { "hsxga", 5120,4096 },
1139 { "wvga", 852, 480 },
1140 { "wxga", 1366, 768 },
1141 { "wsxga", 1600,1024 },
1142 { "wuxga", 1920,1200 },
1143 { "woxga", 2560,1600 },
1144 { "wqsxga", 3200,2048 },
1145 { "wquxga", 3840,2400 },
1146 { "whsxga", 6400,4096 },
1147 { "whuxga", 7680,4800 },
1148 { "cga", 320, 200 },
1149 { "ega", 640, 350 },
1150 { "hd480", 852, 480 },
1151 { "hd720", 1280, 720 },
1152 { "hd1080", 1920,1080 },
1153 };
1154
1155 static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1156 { "ntsc", 30000, 1001 },
1157 { "pal", 25, 1 },
1158 { "qntsc", 30000, 1001 }, /* VCD compliant NTSC */
1159 { "qpal", 25, 1 }, /* VCD compliant PAL */
1160 { "sntsc", 30000, 1001 }, /* square pixel NTSC */
1161 { "spal", 25, 1 }, /* square pixel PAL */
1162 { "film", 24, 1 },
1163 { "ntsc-film", 24000, 1001 },
1164 };
1165
1166 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1167 {
1168 int i;
1169 int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1170 char *p;
1171 int frame_width = 0, frame_height = 0;
1172
1173 for(i=0;i<n;i++) {
1174 if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1175 frame_width = video_frame_size_abbrs[i].width;
1176 frame_height = video_frame_size_abbrs[i].height;
1177 break;
1178 }
1179 }
1180 if (i == n) {
1181 p = str;
1182 frame_width = strtol(p, &p, 10);
1183 if (*p)
1184 p++;
1185 frame_height = strtol(p, &p, 10);
1186 }
1187 if (frame_width <= 0 || frame_height <= 0)
1188 return -1;
1189 *width_ptr = frame_width;
1190 *height_ptr = frame_height;
1191 return 0;
1192 }
1193
1194 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1195 {
1196 int i;
1197 int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1198 char* cp;
1199
1200 /* First, we check our abbreviation table */
1201 for (i = 0; i < n; ++i)
1202 if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1203 frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1204 frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1205 return 0;
1206 }
1207
1208 /* Then, we try to parse it as fraction */
1209 cp = strchr(arg, '/');
1210 if (!cp)
1211 cp = strchr(arg, ':');
1212 if (cp) {
1213 char* cpp;
1214 frame_rate->num = strtol(arg, &cpp, 10);
1215 if (cpp != arg || cpp == cp)
1216 frame_rate->den = strtol(cp+1, &cpp, 10);
1217 else
1218 frame_rate->num = 0;
1219 }
1220 else {
1221 /* Finally we give up and parse it as double */
1222 AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1223 frame_rate->den = time_base.den;
1224 frame_rate->num = time_base.num;
1225 }
1226 if (!frame_rate->num || !frame_rate->den)
1227 return -1;
1228 else
1229 return 0;
1230 }
1231
1232 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1233 int i;
1234 for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1235 return i;
1236 }
1237
1238 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1239 {
1240 av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1241 "version to the newest one from SVN. If the problem still "
1242 "occurs, it means that your file has a feature which has not "
1243 "been implemented.", feature);
1244 if(want_sample)
1245 av_log_ask_for_sample(avc, NULL);
1246 else
1247 av_log(avc, AV_LOG_WARNING, "\n");
1248 }
1249
1250 void av_log_ask_for_sample(void *avc, const char *msg)
1251 {
1252 if (msg)
1253 av_log(avc, AV_LOG_WARNING, "%s ", msg);
1254 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1255 "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1256 "and contact the ffmpeg-devel mailing list.\n");
1257 }
1258
1259 static AVHWAccel *first_hwaccel = NULL;
1260
1261 void av_register_hwaccel(AVHWAccel *hwaccel)
1262 {
1263 AVHWAccel **p = &first_hwaccel;
1264 while (*p)
1265 p = &(*p)->next;
1266 *p = hwaccel;
1267 hwaccel->next = NULL;
1268 }
1269
1270 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1271 {
1272 return hwaccel ? hwaccel->next : first_hwaccel;
1273 }
1274
1275 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1276 {
1277 AVHWAccel *hwaccel=NULL;
1278
1279 while((hwaccel= av_hwaccel_next(hwaccel))){
1280 if ( hwaccel->id == codec_id
1281 && hwaccel->pix_fmt == pix_fmt)
1282 return hwaccel;
1283 }
1284 return NULL;
1285 }
1286
1287 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1288 {
1289 if (ff_lockmgr_cb) {
1290 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1291 return -1;
1292 }
1293
1294 ff_lockmgr_cb = cb;
1295
1296 if (ff_lockmgr_cb) {
1297 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1298 return -1;
1299 }
1300 return 0;
1301 }