Use av_fill_image_pointers/linesizes in place of ff_fill_pointer/linesize,
[libav.git] / libavcodec / utils.c
1 /*
2 * utils for libavcodec
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * utils.
26 */
27
28 #include "libavutil/avstring.h"
29 #include "libavutil/integer.h"
30 #include "libavutil/crc.h"
31 #include "libavutil/pixdesc.h"
32 #include "libavcore/imgutils.h"
33 #include "avcodec.h"
34 #include "dsputil.h"
35 #include "opt.h"
36 #include "imgconvert.h"
37 #include "audioconvert.h"
38 #include "internal.h"
39 #include <stdlib.h>
40 #include <stdarg.h>
41 #include <limits.h>
42 #include <float.h>
43
44 static int volatile entangled_thread_counter=0;
45 int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
46 static void *codec_mutex;
47
48 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
49 {
50 if(min_size < *size)
51 return ptr;
52
53 *size= FFMAX(17*min_size/16 + 32, min_size);
54
55 ptr= av_realloc(ptr, *size);
56 if(!ptr) //we could set this to the unmodified min_size but this is safer if the user lost the ptr and uses NULL now
57 *size= 0;
58
59 return ptr;
60 }
61
62 void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
63 {
64 void **p = ptr;
65 if (min_size < *size)
66 return;
67 *size= FFMAX(17*min_size/16 + 32, min_size);
68 av_free(*p);
69 *p = av_malloc(*size);
70 if (!*p) *size = 0;
71 }
72
73 /* encoder management */
74 static AVCodec *first_avcodec = NULL;
75
76 AVCodec *av_codec_next(AVCodec *c){
77 if(c) return c->next;
78 else return first_avcodec;
79 }
80
81 void avcodec_register(AVCodec *codec)
82 {
83 AVCodec **p;
84 avcodec_init();
85 p = &first_avcodec;
86 while (*p != NULL) p = &(*p)->next;
87 *p = codec;
88 codec->next = NULL;
89 }
90
91 #if LIBAVCODEC_VERSION_MAJOR < 53
92 void register_avcodec(AVCodec *codec)
93 {
94 avcodec_register(codec);
95 }
96 #endif
97
98 unsigned avcodec_get_edge_width(void)
99 {
100 return EDGE_WIDTH;
101 }
102
103 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
104 s->coded_width = width;
105 s->coded_height= height;
106 s->width = -((-width )>>s->lowres);
107 s->height= -((-height)>>s->lowres);
108 }
109
110 typedef struct InternalBuffer{
111 int last_pic_num;
112 uint8_t *base[4];
113 uint8_t *data[4];
114 int linesize[4];
115 int width, height;
116 enum PixelFormat pix_fmt;
117 }InternalBuffer;
118
119 #define INTERNAL_BUFFER_SIZE 32
120
121 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
122 int w_align= 1;
123 int h_align= 1;
124
125 switch(s->pix_fmt){
126 case PIX_FMT_YUV420P:
127 case PIX_FMT_YUYV422:
128 case PIX_FMT_UYVY422:
129 case PIX_FMT_YUV422P:
130 case PIX_FMT_YUV440P:
131 case PIX_FMT_YUV444P:
132 case PIX_FMT_GRAY8:
133 case PIX_FMT_GRAY16BE:
134 case PIX_FMT_GRAY16LE:
135 case PIX_FMT_YUVJ420P:
136 case PIX_FMT_YUVJ422P:
137 case PIX_FMT_YUVJ440P:
138 case PIX_FMT_YUVJ444P:
139 case PIX_FMT_YUVA420P:
140 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
141 h_align= 16;
142 if(s->codec_id == CODEC_ID_MPEG2VIDEO || s->codec_id == CODEC_ID_MJPEG || s->codec_id == CODEC_ID_AMV || s->codec_id == CODEC_ID_THP)
143 h_align= 32; // interlaced is rounded up to 2 MBs
144 break;
145 case PIX_FMT_YUV411P:
146 case PIX_FMT_UYYVYY411:
147 w_align=32;
148 h_align=8;
149 break;
150 case PIX_FMT_YUV410P:
151 if(s->codec_id == CODEC_ID_SVQ1){
152 w_align=64;
153 h_align=64;
154 }
155 case PIX_FMT_RGB555:
156 if(s->codec_id == CODEC_ID_RPZA){
157 w_align=4;
158 h_align=4;
159 }
160 case PIX_FMT_PAL8:
161 case PIX_FMT_BGR8:
162 case PIX_FMT_RGB8:
163 if(s->codec_id == CODEC_ID_SMC){
164 w_align=4;
165 h_align=4;
166 }
167 break;
168 case PIX_FMT_BGR24:
169 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
170 w_align=4;
171 h_align=4;
172 }
173 break;
174 default:
175 w_align= 1;
176 h_align= 1;
177 break;
178 }
179
180 *width = FFALIGN(*width , w_align);
181 *height= FFALIGN(*height, h_align);
182 if(s->codec_id == CODEC_ID_H264)
183 *height+=2; // some of the optimized chroma MC reads one line too much
184
185 linesize_align[0] =
186 linesize_align[1] =
187 linesize_align[2] =
188 linesize_align[3] = STRIDE_ALIGN;
189 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
190 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
191 //picture size unneccessarily in some cases. The solution here is not
192 //pretty and better ideas are welcome!
193 #if HAVE_MMX
194 if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
195 s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
196 s->codec_id == CODEC_ID_VP6A) {
197 linesize_align[0] =
198 linesize_align[1] =
199 linesize_align[2] = 16;
200 }
201 #endif
202 }
203
204 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
205 int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
206 int linesize_align[4];
207 int align;
208 avcodec_align_dimensions2(s, width, height, linesize_align);
209 align = FFMAX(linesize_align[0], linesize_align[3]);
210 linesize_align[1] <<= chroma_shift;
211 linesize_align[2] <<= chroma_shift;
212 align = FFMAX3(align, linesize_align[1], linesize_align[2]);
213 *width=FFALIGN(*width, align);
214 }
215
216 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
217 if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
218 return 0;
219
220 av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
221 return AVERROR(EINVAL);
222 }
223
224 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
225 int i;
226 int w= s->width;
227 int h= s->height;
228 InternalBuffer *buf;
229 int *picture_number;
230
231 if(pic->data[0]!=NULL) {
232 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
233 return -1;
234 }
235 if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
236 av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
237 return -1;
238 }
239
240 if(avcodec_check_dimensions(s,w,h))
241 return -1;
242
243 if(s->internal_buffer==NULL){
244 s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
245 }
246 #if 0
247 s->internal_buffer= av_fast_realloc(
248 s->internal_buffer,
249 &s->internal_buffer_size,
250 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
251 );
252 #endif
253
254 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
255 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
256 (*picture_number)++;
257
258 if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
259 for(i=0; i<4; i++){
260 av_freep(&buf->base[i]);
261 buf->data[i]= NULL;
262 }
263 }
264
265 if(buf->base[0]){
266 pic->age= *picture_number - buf->last_pic_num;
267 buf->last_pic_num= *picture_number;
268 }else{
269 int h_chroma_shift, v_chroma_shift;
270 int size[4] = {0};
271 int tmpsize;
272 int unaligned;
273 AVPicture picture;
274 int stride_align[4];
275
276 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
277
278 avcodec_align_dimensions2(s, &w, &h, stride_align);
279
280 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
281 w+= EDGE_WIDTH*2;
282 h+= EDGE_WIDTH*2;
283 }
284
285 do {
286 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
287 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
288 av_fill_image_linesizes(picture.linesize, s->pix_fmt, w);
289 // increase alignment of w for next try (rhs gives the lowest bit set in w)
290 w += w & ~(w-1);
291
292 unaligned = 0;
293 for (i=0; i<4; i++){
294 unaligned |= picture.linesize[i] % stride_align[i];
295 }
296 } while (unaligned);
297
298 tmpsize = av_fill_image_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
299 if (tmpsize < 0)
300 return -1;
301
302 for (i=0; i<3 && picture.data[i+1]; i++)
303 size[i] = picture.data[i+1] - picture.data[i];
304 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
305
306 buf->last_pic_num= -256*256*256*64;
307 memset(buf->base, 0, sizeof(buf->base));
308 memset(buf->data, 0, sizeof(buf->data));
309
310 for(i=0; i<4 && size[i]; i++){
311 const int h_shift= i==0 ? 0 : h_chroma_shift;
312 const int v_shift= i==0 ? 0 : v_chroma_shift;
313
314 buf->linesize[i]= picture.linesize[i];
315
316 buf->base[i]= av_malloc(size[i]+16); //FIXME 16
317 if(buf->base[i]==NULL) return -1;
318 memset(buf->base[i], 128, size[i]);
319
320 // no edge if EDGE EMU or not planar YUV
321 if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
322 buf->data[i] = buf->base[i];
323 else
324 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
325 }
326 if(size[1] && !size[2])
327 ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
328 buf->width = s->width;
329 buf->height = s->height;
330 buf->pix_fmt= s->pix_fmt;
331 pic->age= 256*256*256*64;
332 }
333 pic->type= FF_BUFFER_TYPE_INTERNAL;
334
335 for(i=0; i<4; i++){
336 pic->base[i]= buf->base[i];
337 pic->data[i]= buf->data[i];
338 pic->linesize[i]= buf->linesize[i];
339 }
340 s->internal_buffer_count++;
341
342 pic->reordered_opaque= s->reordered_opaque;
343
344 if(s->debug&FF_DEBUG_BUFFERS)
345 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
346
347 return 0;
348 }
349
350 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
351 int i;
352 InternalBuffer *buf, *last;
353
354 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
355 assert(s->internal_buffer_count);
356
357 buf = NULL; /* avoids warning */
358 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
359 buf= &((InternalBuffer*)s->internal_buffer)[i];
360 if(buf->data[0] == pic->data[0])
361 break;
362 }
363 assert(i < s->internal_buffer_count);
364 s->internal_buffer_count--;
365 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
366
367 FFSWAP(InternalBuffer, *buf, *last);
368
369 for(i=0; i<4; i++){
370 pic->data[i]=NULL;
371 // pic->base[i]=NULL;
372 }
373 //printf("R%X\n", pic->opaque);
374
375 if(s->debug&FF_DEBUG_BUFFERS)
376 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
377 }
378
379 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
380 AVFrame temp_pic;
381 int i;
382
383 /* If no picture return a new buffer */
384 if(pic->data[0] == NULL) {
385 /* We will copy from buffer, so must be readable */
386 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
387 return s->get_buffer(s, pic);
388 }
389
390 /* If internal buffer type return the same buffer */
391 if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
392 pic->reordered_opaque= s->reordered_opaque;
393 return 0;
394 }
395
396 /*
397 * Not internal type and reget_buffer not overridden, emulate cr buffer
398 */
399 temp_pic = *pic;
400 for(i = 0; i < 4; i++)
401 pic->data[i] = pic->base[i] = NULL;
402 pic->opaque = NULL;
403 /* Allocate new frame */
404 if (s->get_buffer(s, pic))
405 return -1;
406 /* Copy image data from old buffer to new buffer */
407 av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
408 s->height);
409 s->release_buffer(s, &temp_pic); // Release old frame
410 return 0;
411 }
412
413 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
414 int i;
415
416 for(i=0; i<count; i++){
417 int r= func(c, (char*)arg + i*size);
418 if(ret) ret[i]= r;
419 }
420 return 0;
421 }
422
423 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
424 int i;
425
426 for(i=0; i<count; i++){
427 int r= func(c, arg, i, 0);
428 if(ret) ret[i]= r;
429 }
430 return 0;
431 }
432
433 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
434 while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
435 ++fmt;
436 return fmt[0];
437 }
438
439 void avcodec_get_frame_defaults(AVFrame *pic){
440 memset(pic, 0, sizeof(AVFrame));
441
442 pic->pts= AV_NOPTS_VALUE;
443 pic->key_frame= 1;
444 }
445
446 AVFrame *avcodec_alloc_frame(void){
447 AVFrame *pic= av_malloc(sizeof(AVFrame));
448
449 if(pic==NULL) return NULL;
450
451 avcodec_get_frame_defaults(pic);
452
453 return pic;
454 }
455
456 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
457 {
458 int ret= -1;
459
460 /* If there is a user-supplied mutex locking routine, call it. */
461 if (ff_lockmgr_cb) {
462 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
463 return -1;
464 }
465
466 entangled_thread_counter++;
467 if(entangled_thread_counter != 1){
468 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
469 goto end;
470 }
471
472 if(avctx->codec || !codec)
473 goto end;
474
475 if (codec->priv_data_size > 0) {
476 avctx->priv_data = av_mallocz(codec->priv_data_size);
477 if (!avctx->priv_data) {
478 ret = AVERROR(ENOMEM);
479 goto end;
480 }
481 } else {
482 avctx->priv_data = NULL;
483 }
484
485 if(avctx->coded_width && avctx->coded_height)
486 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
487 else if(avctx->width && avctx->height)
488 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
489
490 #define SANE_NB_CHANNELS 128U
491 if (((avctx->coded_width || avctx->coded_height)
492 && avcodec_check_dimensions(avctx, avctx->coded_width, avctx->coded_height))
493 || avctx->channels > SANE_NB_CHANNELS) {
494 ret = AVERROR(EINVAL);
495 goto free_and_end;
496 }
497
498 avctx->codec = codec;
499 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
500 avctx->codec_id == CODEC_ID_NONE) {
501 avctx->codec_type = codec->type;
502 avctx->codec_id = codec->id;
503 }
504 if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
505 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
506 goto free_and_end;
507 }
508 avctx->frame_number = 0;
509 if(avctx->codec->init){
510 if(avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
511 avctx->codec->max_lowres < avctx->lowres){
512 av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
513 avctx->codec->max_lowres);
514 goto free_and_end;
515 }
516
517 ret = avctx->codec->init(avctx);
518 if (ret < 0) {
519 goto free_and_end;
520 }
521 }
522 ret=0;
523 end:
524 entangled_thread_counter--;
525
526 /* Release any user-supplied mutex. */
527 if (ff_lockmgr_cb) {
528 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
529 }
530 return ret;
531 free_and_end:
532 av_freep(&avctx->priv_data);
533 avctx->codec= NULL;
534 goto end;
535 }
536
537 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
538 const short *samples)
539 {
540 if(buf_size < FF_MIN_BUFFER_SIZE && 0){
541 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
542 return -1;
543 }
544 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
545 int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
546 avctx->frame_number++;
547 return ret;
548 }else
549 return 0;
550 }
551
552 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
553 const AVFrame *pict)
554 {
555 if(buf_size < FF_MIN_BUFFER_SIZE){
556 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
557 return -1;
558 }
559 if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
560 return -1;
561 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
562 int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
563 avctx->frame_number++;
564 emms_c(); //needed to avoid an emms_c() call before every return;
565
566 return ret;
567 }else
568 return 0;
569 }
570
571 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
572 const AVSubtitle *sub)
573 {
574 int ret;
575 if(sub->start_display_time) {
576 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
577 return -1;
578 }
579 if(sub->num_rects == 0 || !sub->rects)
580 return -1;
581 ret = avctx->codec->encode(avctx, buf, buf_size, sub);
582 avctx->frame_number++;
583 return ret;
584 }
585
586 #if LIBAVCODEC_VERSION_MAJOR < 53
587 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
588 int *got_picture_ptr,
589 const uint8_t *buf, int buf_size)
590 {
591 AVPacket avpkt;
592 av_init_packet(&avpkt);
593 avpkt.data = buf;
594 avpkt.size = buf_size;
595 // HACK for CorePNG to decode as normal PNG by default
596 avpkt.flags = AV_PKT_FLAG_KEY;
597
598 return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
599 }
600 #endif
601
602 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
603 int *got_picture_ptr,
604 AVPacket *avpkt)
605 {
606 int ret;
607
608 *got_picture_ptr= 0;
609 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
610 return -1;
611 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
612 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
613 avpkt);
614
615 emms_c(); //needed to avoid an emms_c() call before every return;
616
617 if (*got_picture_ptr)
618 avctx->frame_number++;
619 }else
620 ret= 0;
621
622 return ret;
623 }
624
625 #if LIBAVCODEC_VERSION_MAJOR < 53
626 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
627 int *frame_size_ptr,
628 const uint8_t *buf, int buf_size)
629 {
630 AVPacket avpkt;
631 av_init_packet(&avpkt);
632 avpkt.data = buf;
633 avpkt.size = buf_size;
634
635 return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
636 }
637 #endif
638
639 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
640 int *frame_size_ptr,
641 AVPacket *avpkt)
642 {
643 int ret;
644
645 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
646 //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
647 if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
648 av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
649 return -1;
650 }
651 if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
652 *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
653 av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
654 return -1;
655 }
656
657 ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
658 avctx->frame_number++;
659 }else{
660 ret= 0;
661 *frame_size_ptr=0;
662 }
663 return ret;
664 }
665
666 #if LIBAVCODEC_VERSION_MAJOR < 53
667 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
668 int *got_sub_ptr,
669 const uint8_t *buf, int buf_size)
670 {
671 AVPacket avpkt;
672 av_init_packet(&avpkt);
673 avpkt.data = buf;
674 avpkt.size = buf_size;
675
676 return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
677 }
678 #endif
679
680 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
681 int *got_sub_ptr,
682 AVPacket *avpkt)
683 {
684 int ret;
685
686 *got_sub_ptr = 0;
687 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
688 if (*got_sub_ptr)
689 avctx->frame_number++;
690 return ret;
691 }
692
693 void avsubtitle_free(AVSubtitle *sub)
694 {
695 int i;
696
697 for (i = 0; i < sub->num_rects; i++)
698 {
699 av_freep(&sub->rects[i]->pict.data[0]);
700 av_freep(&sub->rects[i]->pict.data[1]);
701 av_freep(&sub->rects[i]->pict.data[2]);
702 av_freep(&sub->rects[i]->pict.data[3]);
703 av_freep(&sub->rects[i]->text);
704 av_freep(&sub->rects[i]->ass);
705 av_freep(&sub->rects[i]);
706 }
707
708 av_freep(&sub->rects);
709
710 memset(sub, 0, sizeof(AVSubtitle));
711 }
712
713 av_cold int avcodec_close(AVCodecContext *avctx)
714 {
715 /* If there is a user-supplied mutex locking routine, call it. */
716 if (ff_lockmgr_cb) {
717 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
718 return -1;
719 }
720
721 entangled_thread_counter++;
722 if(entangled_thread_counter != 1){
723 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
724 entangled_thread_counter--;
725 return -1;
726 }
727
728 if (HAVE_THREADS && avctx->thread_opaque)
729 avcodec_thread_free(avctx);
730 if (avctx->codec && avctx->codec->close)
731 avctx->codec->close(avctx);
732 avcodec_default_free_buffers(avctx);
733 avctx->coded_frame = NULL;
734 av_freep(&avctx->priv_data);
735 if(avctx->codec && avctx->codec->encode)
736 av_freep(&avctx->extradata);
737 avctx->codec = NULL;
738 entangled_thread_counter--;
739
740 /* Release any user-supplied mutex. */
741 if (ff_lockmgr_cb) {
742 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
743 }
744 return 0;
745 }
746
747 AVCodec *avcodec_find_encoder(enum CodecID id)
748 {
749 AVCodec *p, *experimental=NULL;
750 p = first_avcodec;
751 while (p) {
752 if (p->encode != NULL && p->id == id) {
753 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
754 experimental = p;
755 } else
756 return p;
757 }
758 p = p->next;
759 }
760 return experimental;
761 }
762
763 AVCodec *avcodec_find_encoder_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->encode != NULL && strcmp(name,p->name) == 0)
771 return p;
772 p = p->next;
773 }
774 return NULL;
775 }
776
777 AVCodec *avcodec_find_decoder(enum CodecID id)
778 {
779 AVCodec *p;
780 p = first_avcodec;
781 while (p) {
782 if (p->decode != NULL && p->id == id)
783 return p;
784 p = p->next;
785 }
786 return NULL;
787 }
788
789 AVCodec *avcodec_find_decoder_by_name(const char *name)
790 {
791 AVCodec *p;
792 if (!name)
793 return NULL;
794 p = first_avcodec;
795 while (p) {
796 if (p->decode != NULL && strcmp(name,p->name) == 0)
797 return p;
798 p = p->next;
799 }
800 return NULL;
801 }
802
803 static int get_bit_rate(AVCodecContext *ctx)
804 {
805 int bit_rate;
806 int bits_per_sample;
807
808 switch(ctx->codec_type) {
809 case AVMEDIA_TYPE_VIDEO:
810 case AVMEDIA_TYPE_DATA:
811 case AVMEDIA_TYPE_SUBTITLE:
812 case AVMEDIA_TYPE_ATTACHMENT:
813 bit_rate = ctx->bit_rate;
814 break;
815 case AVMEDIA_TYPE_AUDIO:
816 bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
817 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
818 break;
819 default:
820 bit_rate = 0;
821 break;
822 }
823 return bit_rate;
824 }
825
826 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
827 {
828 int i, len, ret = 0;
829
830 for (i = 0; i < 4; i++) {
831 len = snprintf(buf, buf_size,
832 isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
833 buf += len;
834 buf_size = buf_size > len ? buf_size - len : 0;
835 ret += len;
836 codec_tag>>=8;
837 }
838 return ret;
839 }
840
841 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
842 {
843 const char *codec_name;
844 AVCodec *p;
845 char buf1[32];
846 int bitrate;
847 AVRational display_aspect_ratio;
848
849 if (encode)
850 p = avcodec_find_encoder(enc->codec_id);
851 else
852 p = avcodec_find_decoder(enc->codec_id);
853
854 if (p) {
855 codec_name = p->name;
856 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
857 /* fake mpeg2 transport stream codec (currently not
858 registered) */
859 codec_name = "mpeg2ts";
860 } else if (enc->codec_name[0] != '\0') {
861 codec_name = enc->codec_name;
862 } else {
863 /* output avi tags */
864 char tag_buf[32];
865 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
866 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
867 codec_name = buf1;
868 }
869
870 switch(enc->codec_type) {
871 case AVMEDIA_TYPE_VIDEO:
872 snprintf(buf, buf_size,
873 "Video: %s%s",
874 codec_name, enc->mb_decision ? " (hq)" : "");
875 if (enc->pix_fmt != PIX_FMT_NONE) {
876 snprintf(buf + strlen(buf), buf_size - strlen(buf),
877 ", %s",
878 avcodec_get_pix_fmt_name(enc->pix_fmt));
879 }
880 if (enc->width) {
881 snprintf(buf + strlen(buf), buf_size - strlen(buf),
882 ", %dx%d",
883 enc->width, enc->height);
884 if (enc->sample_aspect_ratio.num) {
885 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
886 enc->width*enc->sample_aspect_ratio.num,
887 enc->height*enc->sample_aspect_ratio.den,
888 1024*1024);
889 snprintf(buf + strlen(buf), buf_size - strlen(buf),
890 " [PAR %d:%d DAR %d:%d]",
891 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
892 display_aspect_ratio.num, display_aspect_ratio.den);
893 }
894 if(av_log_get_level() >= AV_LOG_DEBUG){
895 int g= av_gcd(enc->time_base.num, enc->time_base.den);
896 snprintf(buf + strlen(buf), buf_size - strlen(buf),
897 ", %d/%d",
898 enc->time_base.num/g, enc->time_base.den/g);
899 }
900 }
901 if (encode) {
902 snprintf(buf + strlen(buf), buf_size - strlen(buf),
903 ", q=%d-%d", enc->qmin, enc->qmax);
904 }
905 break;
906 case AVMEDIA_TYPE_AUDIO:
907 snprintf(buf, buf_size,
908 "Audio: %s",
909 codec_name);
910 if (enc->sample_rate) {
911 snprintf(buf + strlen(buf), buf_size - strlen(buf),
912 ", %d Hz", enc->sample_rate);
913 }
914 av_strlcat(buf, ", ", buf_size);
915 avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
916 if (enc->sample_fmt != SAMPLE_FMT_NONE) {
917 snprintf(buf + strlen(buf), buf_size - strlen(buf),
918 ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
919 }
920 break;
921 case AVMEDIA_TYPE_DATA:
922 snprintf(buf, buf_size, "Data: %s", codec_name);
923 break;
924 case AVMEDIA_TYPE_SUBTITLE:
925 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
926 break;
927 case AVMEDIA_TYPE_ATTACHMENT:
928 snprintf(buf, buf_size, "Attachment: %s", codec_name);
929 break;
930 default:
931 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
932 return;
933 }
934 if (encode) {
935 if (enc->flags & CODEC_FLAG_PASS1)
936 snprintf(buf + strlen(buf), buf_size - strlen(buf),
937 ", pass 1");
938 if (enc->flags & CODEC_FLAG_PASS2)
939 snprintf(buf + strlen(buf), buf_size - strlen(buf),
940 ", pass 2");
941 }
942 bitrate = get_bit_rate(enc);
943 if (bitrate != 0) {
944 snprintf(buf + strlen(buf), buf_size - strlen(buf),
945 ", %d kb/s", bitrate / 1000);
946 }
947 }
948
949 unsigned avcodec_version( void )
950 {
951 return LIBAVCODEC_VERSION_INT;
952 }
953
954 const char *avcodec_configuration(void)
955 {
956 return FFMPEG_CONFIGURATION;
957 }
958
959 const char *avcodec_license(void)
960 {
961 #define LICENSE_PREFIX "libavcodec license: "
962 return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
963 }
964
965 void avcodec_init(void)
966 {
967 static int initialized = 0;
968
969 if (initialized != 0)
970 return;
971 initialized = 1;
972
973 dsputil_static_init();
974 }
975
976 void avcodec_flush_buffers(AVCodecContext *avctx)
977 {
978 if(avctx->codec->flush)
979 avctx->codec->flush(avctx);
980 }
981
982 void avcodec_default_free_buffers(AVCodecContext *s){
983 int i, j;
984
985 if(s->internal_buffer==NULL) return;
986
987 if (s->internal_buffer_count)
988 av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
989 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
990 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
991 for(j=0; j<4; j++){
992 av_freep(&buf->base[j]);
993 buf->data[j]= NULL;
994 }
995 }
996 av_freep(&s->internal_buffer);
997
998 s->internal_buffer_count=0;
999 }
1000
1001 char av_get_pict_type_char(int pict_type){
1002 switch(pict_type){
1003 case FF_I_TYPE: return 'I';
1004 case FF_P_TYPE: return 'P';
1005 case FF_B_TYPE: return 'B';
1006 case FF_S_TYPE: return 'S';
1007 case FF_SI_TYPE:return 'i';
1008 case FF_SP_TYPE:return 'p';
1009 case FF_BI_TYPE:return 'b';
1010 default: return '?';
1011 }
1012 }
1013
1014 int av_get_bits_per_sample(enum CodecID codec_id){
1015 switch(codec_id){
1016 case CODEC_ID_ADPCM_SBPRO_2:
1017 return 2;
1018 case CODEC_ID_ADPCM_SBPRO_3:
1019 return 3;
1020 case CODEC_ID_ADPCM_SBPRO_4:
1021 case CODEC_ID_ADPCM_CT:
1022 case CODEC_ID_ADPCM_IMA_WAV:
1023 case CODEC_ID_ADPCM_MS:
1024 case CODEC_ID_ADPCM_YAMAHA:
1025 return 4;
1026 case CODEC_ID_PCM_ALAW:
1027 case CODEC_ID_PCM_MULAW:
1028 case CODEC_ID_PCM_S8:
1029 case CODEC_ID_PCM_U8:
1030 case CODEC_ID_PCM_ZORK:
1031 return 8;
1032 case CODEC_ID_PCM_S16BE:
1033 case CODEC_ID_PCM_S16LE:
1034 case CODEC_ID_PCM_S16LE_PLANAR:
1035 case CODEC_ID_PCM_U16BE:
1036 case CODEC_ID_PCM_U16LE:
1037 return 16;
1038 case CODEC_ID_PCM_S24DAUD:
1039 case CODEC_ID_PCM_S24BE:
1040 case CODEC_ID_PCM_S24LE:
1041 case CODEC_ID_PCM_U24BE:
1042 case CODEC_ID_PCM_U24LE:
1043 return 24;
1044 case CODEC_ID_PCM_S32BE:
1045 case CODEC_ID_PCM_S32LE:
1046 case CODEC_ID_PCM_U32BE:
1047 case CODEC_ID_PCM_U32LE:
1048 case CODEC_ID_PCM_F32BE:
1049 case CODEC_ID_PCM_F32LE:
1050 return 32;
1051 case CODEC_ID_PCM_F64BE:
1052 case CODEC_ID_PCM_F64LE:
1053 return 64;
1054 default:
1055 return 0;
1056 }
1057 }
1058
1059 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
1060 switch (sample_fmt) {
1061 case SAMPLE_FMT_U8:
1062 return 8;
1063 case SAMPLE_FMT_S16:
1064 return 16;
1065 case SAMPLE_FMT_S32:
1066 case SAMPLE_FMT_FLT:
1067 return 32;
1068 case SAMPLE_FMT_DBL:
1069 return 64;
1070 default:
1071 return 0;
1072 }
1073 }
1074
1075 #if !HAVE_THREADS
1076 int avcodec_thread_init(AVCodecContext *s, int thread_count){
1077 s->thread_count = thread_count;
1078 return -1;
1079 }
1080 #endif
1081
1082 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1083 {
1084 unsigned int n = 0;
1085
1086 while(v >= 0xff) {
1087 *s++ = 0xff;
1088 v -= 0xff;
1089 n++;
1090 }
1091 *s = v;
1092 n++;
1093 return n;
1094 }
1095
1096 #if LIBAVCODEC_VERSION_MAJOR < 53
1097 #include "libavcore/parseutils.h"
1098
1099 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1100 {
1101 return av_parse_video_size(width_ptr, height_ptr, str);
1102 }
1103
1104 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1105 {
1106 return av_parse_video_rate(frame_rate, arg);
1107 }
1108 #endif
1109
1110 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1111 int i;
1112 for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1113 return i;
1114 }
1115
1116 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1117 {
1118 av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1119 "version to the newest one from SVN. If the problem still "
1120 "occurs, it means that your file has a feature which has not "
1121 "been implemented.", feature);
1122 if(want_sample)
1123 av_log_ask_for_sample(avc, NULL);
1124 else
1125 av_log(avc, AV_LOG_WARNING, "\n");
1126 }
1127
1128 void av_log_ask_for_sample(void *avc, const char *msg)
1129 {
1130 if (msg)
1131 av_log(avc, AV_LOG_WARNING, "%s ", msg);
1132 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1133 "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1134 "and contact the ffmpeg-devel mailing list.\n");
1135 }
1136
1137 static AVHWAccel *first_hwaccel = NULL;
1138
1139 void av_register_hwaccel(AVHWAccel *hwaccel)
1140 {
1141 AVHWAccel **p = &first_hwaccel;
1142 while (*p)
1143 p = &(*p)->next;
1144 *p = hwaccel;
1145 hwaccel->next = NULL;
1146 }
1147
1148 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1149 {
1150 return hwaccel ? hwaccel->next : first_hwaccel;
1151 }
1152
1153 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1154 {
1155 AVHWAccel *hwaccel=NULL;
1156
1157 while((hwaccel= av_hwaccel_next(hwaccel))){
1158 if ( hwaccel->id == codec_id
1159 && hwaccel->pix_fmt == pix_fmt)
1160 return hwaccel;
1161 }
1162 return NULL;
1163 }
1164
1165 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1166 {
1167 if (ff_lockmgr_cb) {
1168 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1169 return -1;
1170 }
1171
1172 ff_lockmgr_cb = cb;
1173
1174 if (ff_lockmgr_cb) {
1175 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1176 return -1;
1177 }
1178 return 0;
1179 }
1180
1181 unsigned int ff_toupper4(unsigned int x)
1182 {
1183 return toupper( x &0xFF)
1184 + (toupper((x>>8 )&0xFF)<<8 )
1185 + (toupper((x>>16)&0xFF)<<16)
1186 + (toupper((x>>24)&0xFF)<<24);
1187 }