Fix a crash caused by a null coded_picture pointer in ffserver.
[libav.git] / libavcodec / utils.c
CommitLineData
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1/*
2 * utils for libavcodec
ff4ec49e 3 * Copyright (c) 2001 Fabrice Bellard.
de6d9b64 4 *
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5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
de6d9b64 9 *
ff4ec49e 10 * This library is distributed in the hope that it will be useful,
de6d9b64 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
de6d9b64 14 *
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15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
de6d9b64 18 */
de6d9b64 19#include "avcodec.h"
3123dd79 20#include "dsputil.h"
1c2a8c7f 21#include "mpegvideo.h"
de6d9b64 22
18f77016 23void *av_mallocz(unsigned int size)
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24{
25 void *ptr;
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26
27 if(size == 0) fprintf(stderr, "Warning, allocating 0 bytes\n");
28
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29 ptr = av_malloc(size);
30 if (!ptr)
31 return NULL;
32 memset(ptr, 0, size);
33 return ptr;
34}
35
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36/* allocation of static arrays - do not use for normal allocation */
37static unsigned int last_static = 0;
38static char*** array_static = NULL;
39static const unsigned int grow_static = 64; // ^2
40void *__av_mallocz_static(void** location, unsigned int size)
41{
42 int l = (last_static + grow_static) & ~(grow_static - 1);
43 void *ptr = av_mallocz(size);
44 if (!ptr)
45 return NULL;
46
47 if (location)
48 {
49 if (l > last_static)
50 array_static = realloc(array_static, l);
51 array_static[last_static++] = (char**) location;
52 *location = ptr;
53 }
54 return ptr;
55}
56/* free all static arrays and reset pointers to 0 */
57void av_free_static()
58{
59 if (array_static)
60 {
61 unsigned i;
62 for (i = 0; i < last_static; i++)
63 {
64 free(*array_static[i]);
65 *array_static[i] = NULL;
66 }
67 free(array_static);
68 array_static = 0;
69 }
70 last_static = 0;
71}
72
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73/* cannot call it directly because of 'void **' casting is not automatic */
74void __av_freep(void **ptr)
75{
76 av_free(*ptr);
77 *ptr = NULL;
78}
79
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80/* encoder management */
81AVCodec *first_avcodec;
82
83void register_avcodec(AVCodec *format)
84{
85 AVCodec **p;
86 p = &first_avcodec;
87 while (*p != NULL) p = &(*p)->next;
88 *p = format;
89 format->next = NULL;
90}
91
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92void avcodec_get_chroma_sub_sample(int fmt, int *h_shift, int *v_shift){
93 switch(fmt){
94 case PIX_FMT_YUV410P:
95 *h_shift=2;
96 *v_shift=2;
97 break;
98 case PIX_FMT_YUV420P:
99 *h_shift=1;
100 *v_shift=1;
101 break;
102 case PIX_FMT_YUV411P:
103 *h_shift=2;
104 *v_shift=0;
105 break;
106 case PIX_FMT_YUV422P:
107 case PIX_FMT_YUV422:
108 *h_shift=1;
109 *v_shift=0;
110 break;
111 default: //RGB/...
112 *h_shift=0;
113 *v_shift=0;
114 break;
115 }
116}
117
118typedef struct DefaultPicOpaque{
119 int last_pic_num;
120 uint8_t *data[4];
121}DefaultPicOpaque;
122
123int avcodec_default_get_buffer(AVCodecContext *s, AVVideoFrame *pic){
124 int i;
125 const int width = s->width;
126 const int height= s->height;
127 DefaultPicOpaque *opaque;
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128
129 assert(pic->data[0]==NULL);
130 assert(pic->type==0 || pic->type==FF_TYPE_INTERNAL);
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131
132 if(pic->opaque){
133 opaque= (DefaultPicOpaque *)pic->opaque;
134 for(i=0; i<3; i++)
135 pic->data[i]= opaque->data[i];
136
137// printf("get_buffer %X coded_pic_num:%d last:%d\n", pic->opaque, pic->coded_picture_number, opaque->last_pic_num);
138 pic->age= pic->coded_picture_number - opaque->last_pic_num;
139 opaque->last_pic_num= pic->coded_picture_number;
140//printf("age: %d %d %d\n", pic->age, c->picture_number, pic->coded_picture_number);
141 }else{
142 int align, h_chroma_shift, v_chroma_shift;
143 int w, h, pixel_size;
144
145 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
146
147 switch(s->pix_fmt){
148 case PIX_FMT_YUV422:
149 pixel_size=2;
150 break;
151 case PIX_FMT_RGB24:
152 case PIX_FMT_BGR24:
153 pixel_size=3;
154 break;
155 case PIX_FMT_BGRA32:
156 case PIX_FMT_RGBA32:
157 pixel_size=4;
158 break;
159 default:
160 pixel_size=1;
161 }
162
163 if(s->codec_id==CODEC_ID_SVQ1) align=63;
164 else align=15;
165
166 w= (width +align)&~align;
167 h= (height+align)&~align;
168
169 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
170 w+= EDGE_WIDTH*2;
171 h+= EDGE_WIDTH*2;
172 }
173
174 opaque= av_mallocz(sizeof(DefaultPicOpaque));
175 if(opaque==NULL) return -1;
176
177 pic->opaque= opaque;
178 opaque->last_pic_num= -256*256*256*64;
179
180 for(i=0; i<3; i++){
181 int h_shift= i==0 ? 0 : h_chroma_shift;
182 int v_shift= i==0 ? 0 : v_chroma_shift;
183
184 pic->linesize[i]= pixel_size*w>>h_shift;
185
186 pic->base[i]= av_mallocz((pic->linesize[i]*h>>v_shift)+16); //FIXME 16
187 if(pic->base[i]==NULL) return -1;
188
189 memset(pic->base[i], 128, pic->linesize[i]*h>>v_shift);
190
191 if(s->flags&CODEC_FLAG_EMU_EDGE)
4e00e76b 192 pic->data[i] = pic->base[i] + 16; //FIXME 16
1e491e29 193 else
4e00e76b 194 pic->data[i] = pic->base[i] + (pic->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift) + 16; //FIXME 16
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195
196 opaque->data[i]= pic->data[i];
197 }
198 pic->age= 256*256*256*64;
4e00e76b 199 pic->type= FF_BUFFER_TYPE_INTERNAL;
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200 }
201
202 return 0;
203}
204
205void avcodec_default_release_buffer(AVCodecContext *s, AVVideoFrame *pic){
206 int i;
207
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208 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
209
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210 for(i=0; i<3; i++)
211 pic->data[i]=NULL;
212//printf("R%X\n", pic->opaque);
213}
214
a949d72e 215void avcodec_get_context_defaults(AVCodecContext *s){
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216 s->bit_rate= 800*1000;
217 s->bit_rate_tolerance= s->bit_rate*10;
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218 s->qmin= 2;
219 s->qmax= 31;
220 s->rc_eq= "tex^qComp";
221 s->qcompress= 0.5;
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222 s->max_qdiff= 3;
223 s->b_quant_factor=1.25;
224 s->b_quant_offset=1.25;
b3a391e8 225 s->i_quant_factor=-0.8;
e8b62df6 226 s->i_quant_offset=0.0;
4d2858de 227 s->error_concealment= 3;
8d0e42ca 228 s->error_resilience= 1;
4d2858de 229 s->workaround_bugs= FF_BUG_AUTODETECT;
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230 s->frame_rate = 25 * FRAME_RATE_BASE;
231 s->gop_size= 50;
232 s->me_method= ME_EPZS;
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233 s->get_buffer= avcodec_default_get_buffer;
234 s->release_buffer= avcodec_default_release_buffer;
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235}
236
237/**
238 * allocates a AVCodecContext and set it to defaults.
239 * this can be deallocated by simply calling free()
240 */
7ffbb60e 241AVCodecContext *avcodec_alloc_context(void){
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242 AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
243
244 if(avctx==NULL) return NULL;
245
246 avcodec_get_context_defaults(avctx);
247
248 return avctx;
249}
250
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251/**
252 * allocates a AVPicture and set it to defaults.
253 * this can be deallocated by simply calling free()
254 */
255AVVideoFrame *avcodec_alloc_picture(void){
256 AVVideoFrame *pic= av_mallocz(sizeof(AVVideoFrame));
257
258 return pic;
259}
260
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261int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
262{
263 int ret;
264
265 avctx->codec = codec;
266 avctx->frame_number = 0;
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267 if (codec->priv_data_size > 0) {
268 avctx->priv_data = av_mallocz(codec->priv_data_size);
269 if (!avctx->priv_data)
270 return -ENOMEM;
271 } else {
272 avctx->priv_data = NULL;
273 }
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274 ret = avctx->codec->init(avctx);
275 if (ret < 0) {
3123dd79 276 av_freep(&avctx->priv_data);
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277 return ret;
278 }
279 return 0;
280}
281
282int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
283 const short *samples)
284{
285 int ret;
286
287 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
288 avctx->frame_number++;
289 return ret;
290}
291
292int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
1e491e29 293 const AVVideoFrame *pict)
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294{
295 int ret;
296
297 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
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298
299 emms_c(); //needed to avoid a emms_c() call before every return;
300
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301 avctx->frame_number++;
302 return ret;
303}
304
305/* decode a frame. return -1 if error, otherwise return the number of
306 bytes used. If no frame could be decompressed, *got_picture_ptr is
307 zero. Otherwise, it is non zero */
1e491e29 308int avcodec_decode_video(AVCodecContext *avctx, AVVideoFrame *picture,
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309 int *got_picture_ptr,
310 UINT8 *buf, int buf_size)
311{
312 int ret;
1e491e29 313
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314 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
315 buf, buf_size);
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316
317 emms_c(); //needed to avoid a emms_c() call before every return;
1e491e29 318
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319 if (*got_picture_ptr)
320 avctx->frame_number++;
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321 return ret;
322}
323
324/* decode an audio frame. return -1 if error, otherwise return the
325 *number of bytes used. If no frame could be decompressed,
326 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
327 *size in BYTES. */
328int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
329 int *frame_size_ptr,
330 UINT8 *buf, int buf_size)
331{
332 int ret;
333
334 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
335 buf, buf_size);
336 avctx->frame_number++;
337 return ret;
338}
339
340int avcodec_close(AVCodecContext *avctx)
341{
342 if (avctx->codec->close)
343 avctx->codec->close(avctx);
3123dd79 344 av_freep(&avctx->priv_data);
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345 avctx->codec = NULL;
346 return 0;
347}
348
349AVCodec *avcodec_find_encoder(enum CodecID id)
350{
351 AVCodec *p;
352 p = first_avcodec;
353 while (p) {
354 if (p->encode != NULL && p->id == id)
355 return p;
356 p = p->next;
357 }
358 return NULL;
359}
360
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361AVCodec *avcodec_find_encoder_by_name(const char *name)
362{
363 AVCodec *p;
364 p = first_avcodec;
365 while (p) {
366 if (p->encode != NULL && strcmp(name,p->name) == 0)
367 return p;
368 p = p->next;
369 }
370 return NULL;
371}
372
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373AVCodec *avcodec_find_decoder(enum CodecID id)
374{
375 AVCodec *p;
376 p = first_avcodec;
377 while (p) {
378 if (p->decode != NULL && p->id == id)
379 return p;
380 p = p->next;
381 }
382 return NULL;
383}
384
385AVCodec *avcodec_find_decoder_by_name(const char *name)
386{
387 AVCodec *p;
388 p = first_avcodec;
389 while (p) {
390 if (p->decode != NULL && strcmp(name,p->name) == 0)
391 return p;
392 p = p->next;
393 }
394 return NULL;
395}
396
397AVCodec *avcodec_find(enum CodecID id)
398{
399 AVCodec *p;
400 p = first_avcodec;
401 while (p) {
402 if (p->id == id)
403 return p;
404 p = p->next;
405 }
406 return NULL;
407}
408
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409const char *pix_fmt_str[] = {
410 "yuv420p",
411 "yuv422",
412 "rgb24",
413 "bgr24",
414 "yuv422p",
415 "yuv444p",
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416 "rgba32",
417 "bgra32",
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418 "yuv410p",
419 "yuv411p",
cf087595 420};
a5e88058 421
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422void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
423{
424 const char *codec_name;
425 AVCodec *p;
426 char buf1[32];
623563c0 427 char channels_str[100];
a96b68b7 428 int bitrate;
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429
430 if (encode)
431 p = avcodec_find_encoder(enc->codec_id);
432 else
433 p = avcodec_find_decoder(enc->codec_id);
434
435 if (p) {
436 codec_name = p->name;
437 } else if (enc->codec_name[0] != '\0') {
438 codec_name = enc->codec_name;
439 } else {
440 /* output avi tags */
441 if (enc->codec_type == CODEC_TYPE_VIDEO) {
442 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
443 enc->codec_tag & 0xff,
444 (enc->codec_tag >> 8) & 0xff,
445 (enc->codec_tag >> 16) & 0xff,
446 (enc->codec_tag >> 24) & 0xff);
447 } else {
448 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
449 }
450 codec_name = buf1;
451 }
452
453 switch(enc->codec_type) {
454 case CODEC_TYPE_VIDEO:
455 snprintf(buf, buf_size,
456 "Video: %s%s",
457 codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
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458 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
459 snprintf(buf + strlen(buf), buf_size - strlen(buf),
460 ", %s",
461 pix_fmt_str[enc->pix_fmt]);
462 }
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463 if (enc->width) {
464 snprintf(buf + strlen(buf), buf_size - strlen(buf),
465 ", %dx%d, %0.2f fps",
466 enc->width, enc->height,
467 (float)enc->frame_rate / FRAME_RATE_BASE);
468 }
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469 if (encode) {
470 snprintf(buf + strlen(buf), buf_size - strlen(buf),
471 ", q=%d-%d", enc->qmin, enc->qmax);
472 }
a96b68b7 473 bitrate = enc->bit_rate;
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474 break;
475 case CODEC_TYPE_AUDIO:
476 snprintf(buf, buf_size,
477 "Audio: %s",
478 codec_name);
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479 switch (enc->channels) {
480 case 1:
623563c0 481 strcpy(channels_str, "mono");
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482 break;
483 case 2:
623563c0 484 strcpy(channels_str, "stereo");
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485 break;
486 case 6:
623563c0 487 strcpy(channels_str, "5:1");
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488 break;
489 default:
490 sprintf(channels_str, "%d channels", enc->channels);
491 break;
492 }
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493 if (enc->sample_rate) {
494 snprintf(buf + strlen(buf), buf_size - strlen(buf),
495 ", %d Hz, %s",
496 enc->sample_rate,
e0d2714a 497 channels_str);
de6d9b64 498 }
e0d2714a 499
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500 /* for PCM codecs, compute bitrate directly */
501 switch(enc->codec_id) {
502 case CODEC_ID_PCM_S16LE:
503 case CODEC_ID_PCM_S16BE:
504 case CODEC_ID_PCM_U16LE:
505 case CODEC_ID_PCM_U16BE:
a190b7e9 506 bitrate = enc->sample_rate * enc->channels * 16;
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507 break;
508 case CODEC_ID_PCM_S8:
509 case CODEC_ID_PCM_U8:
510 case CODEC_ID_PCM_ALAW:
511 case CODEC_ID_PCM_MULAW:
a190b7e9 512 bitrate = enc->sample_rate * enc->channels * 8;
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513 break;
514 default:
515 bitrate = enc->bit_rate;
516 break;
517 }
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518 break;
519 default:
b71472eb 520 av_abort();
de6d9b64 521 }
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522 if (encode) {
523 if (enc->flags & CODEC_FLAG_PASS1)
524 snprintf(buf + strlen(buf), buf_size - strlen(buf),
525 ", pass 1");
526 if (enc->flags & CODEC_FLAG_PASS2)
527 snprintf(buf + strlen(buf), buf_size - strlen(buf),
528 ", pass 2");
529 }
a96b68b7 530 if (bitrate != 0) {
de6d9b64 531 snprintf(buf + strlen(buf), buf_size - strlen(buf),
a96b68b7 532 ", %d kb/s", bitrate / 1000);
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533 }
534}
535
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536/* Picture field are filled with 'ptr' addresses */
537void avpicture_fill(AVPicture *picture, UINT8 *ptr,
538 int pix_fmt, int width, int height)
539{
540 int size;
541
542 size = width * height;
543 switch(pix_fmt) {
544 case PIX_FMT_YUV420P:
545 picture->data[0] = ptr;
546 picture->data[1] = picture->data[0] + size;
547 picture->data[2] = picture->data[1] + size / 4;
548 picture->linesize[0] = width;
549 picture->linesize[1] = width / 2;
550 picture->linesize[2] = width / 2;
551 break;
552 case PIX_FMT_YUV422P:
553 picture->data[0] = ptr;
554 picture->data[1] = picture->data[0] + size;
555 picture->data[2] = picture->data[1] + size / 2;
556 picture->linesize[0] = width;
557 picture->linesize[1] = width / 2;
558 picture->linesize[2] = width / 2;
559 break;
560 case PIX_FMT_YUV444P:
561 picture->data[0] = ptr;
562 picture->data[1] = picture->data[0] + size;
563 picture->data[2] = picture->data[1] + size;
564 picture->linesize[0] = width;
565 picture->linesize[1] = width;
566 picture->linesize[2] = width;
567 break;
568 case PIX_FMT_RGB24:
569 case PIX_FMT_BGR24:
570 picture->data[0] = ptr;
571 picture->data[1] = NULL;
572 picture->data[2] = NULL;
573 picture->linesize[0] = width * 3;
574 break;
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575 case PIX_FMT_RGBA32:
576 case PIX_FMT_BGRA32:
577 picture->data[0] = ptr;
578 picture->data[1] = NULL;
579 picture->data[2] = NULL;
580 picture->linesize[0] = width * 4;
581 break;
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582 case PIX_FMT_YUV422:
583 picture->data[0] = ptr;
584 picture->data[1] = NULL;
585 picture->data[2] = NULL;
586 picture->linesize[0] = width * 2;
587 break;
588 default:
589 picture->data[0] = NULL;
590 picture->data[1] = NULL;
591 picture->data[2] = NULL;
592 break;
593 }
594}
595
596int avpicture_get_size(int pix_fmt, int width, int height)
597{
598 int size;
599
600 size = width * height;
601 switch(pix_fmt) {
602 case PIX_FMT_YUV420P:
603 size = (size * 3) / 2;
604 break;
605 case PIX_FMT_YUV422P:
606 size = (size * 2);
607 break;
608 case PIX_FMT_YUV444P:
609 size = (size * 3);
610 break;
611 case PIX_FMT_RGB24:
612 case PIX_FMT_BGR24:
613 size = (size * 3);
614 break;
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615 case PIX_FMT_RGBA32:
616 case PIX_FMT_BGRA32:
617 size = (size * 4);
618 break;
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619 case PIX_FMT_YUV422:
620 size = (size * 2);
621 break;
622 default:
623 size = -1;
624 break;
625 }
626 return size;
627}
628
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629unsigned avcodec_version( void )
630{
631 return LIBAVCODEC_VERSION_INT;
632}
cf087595 633
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634unsigned avcodec_build( void )
635{
636 return LIBAVCODEC_BUILD;
637}
638
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639/* must be called before any other functions */
640void avcodec_init(void)
641{
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642 static int inited = 0;
643
644 if (inited != 0)
645 return;
646 inited = 1;
647
c6af86c2 648 //dsputil_init();
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649}
650
4e00e76b 651/* this can be called after seeking and before trying to decode the next keyframe */
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652void avcodec_flush_buffers(AVCodecContext *avctx)
653{
4e00e76b 654 int i;
1c2a8c7f 655 MpegEncContext *s = avctx->priv_data;
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656
657 switch(avctx->codec_id){
658 case CODEC_ID_MPEG1VIDEO:
659 case CODEC_ID_H263:
660 case CODEC_ID_RV10:
661 case CODEC_ID_MJPEG:
662 case CODEC_ID_MJPEGB:
663 case CODEC_ID_MPEG4:
664 case CODEC_ID_MSMPEG4V1:
665 case CODEC_ID_MSMPEG4V2:
666 case CODEC_ID_MSMPEG4V3:
667 case CODEC_ID_WMV1:
668 case CODEC_ID_WMV2:
669 case CODEC_ID_H263P:
670 case CODEC_ID_H263I:
671 case CODEC_ID_SVQ1:
672 for(i=0; i<MAX_PICTURE_COUNT; i++){
673 if(s->picture[i].data[0] && ( s->picture[i].type == FF_BUFFER_TYPE_INTERNAL
674 || s->picture[i].type == FF_BUFFER_TYPE_USER))
675 avctx->release_buffer(avctx, (AVVideoFrame*)&s->picture[i]);
676 }
677 break;
678 default:
679 //FIXME
680 break;
681 }
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682}
683
cd4af68a 684static int raw_encode_init(AVCodecContext *s)
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685{
686 return 0;
687}
688
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689static int raw_decode_frame(AVCodecContext *avctx,
690 void *data, int *data_size,
691 UINT8 *buf, int buf_size)
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692{
693 return -1;
694}
695
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696static int raw_encode_frame(AVCodecContext *avctx,
697 unsigned char *frame, int buf_size, void *data)
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698{
699 return -1;
700}
701
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702AVCodec rawvideo_codec = {
703 "rawvideo",
704 CODEC_TYPE_VIDEO,
705 CODEC_ID_RAWVIDEO,
706 0,
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707 raw_encode_init,
708 raw_encode_frame,
de6d9b64 709 NULL,
cd4af68a 710 raw_decode_frame,
de6d9b64 711};