Ensure that the palette is set in data[1] for all 8bit formats.
[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 "avcodec.h"
35 #include "dsputil.h"
36 #include "opt.h"
37 #include "imgconvert.h"
38 #include "audioconvert.h"
39 #include "internal.h"
40 #include <stdlib.h>
41 #include <stdarg.h>
42 #include <limits.h>
43 #include <float.h>
44 #if !HAVE_MKSTEMP
45 #include <fcntl.h>
46 #endif
47
48 const uint8_t ff_reverse[256]={
49 0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
50 0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
51 0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
52 0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
53 0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
54 0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
55 0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
56 0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
57 0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
58 0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
59 0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
60 0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
61 0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
62 0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
63 0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
64 0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
65 };
66
67 static int volatile entangled_thread_counter=0;
68
69 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
70 {
71 if(min_size < *size)
72 return ptr;
73
74 *size= FFMAX(17*min_size/16 + 32, min_size);
75
76 ptr= av_realloc(ptr, *size);
77 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
78 *size= 0;
79
80 return ptr;
81 }
82
83 /* encoder management */
84 static AVCodec *first_avcodec = NULL;
85
86 AVCodec *av_codec_next(AVCodec *c){
87 if(c) return c->next;
88 else return first_avcodec;
89 }
90
91 void register_avcodec(AVCodec *codec)
92 {
93 AVCodec **p;
94 avcodec_init();
95 p = &first_avcodec;
96 while (*p != NULL) p = &(*p)->next;
97 *p = codec;
98 codec->next = NULL;
99 }
100
101 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
102 s->coded_width = width;
103 s->coded_height= height;
104 s->width = -((-width )>>s->lowres);
105 s->height= -((-height)>>s->lowres);
106 }
107
108 typedef struct InternalBuffer{
109 int last_pic_num;
110 uint8_t *base[4];
111 uint8_t *data[4];
112 int linesize[4];
113 int width, height;
114 enum PixelFormat pix_fmt;
115 }InternalBuffer;
116
117 #define INTERNAL_BUFFER_SIZE 32
118
119 #define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
120
121 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
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_YUV444P:
131 case PIX_FMT_GRAY8:
132 case PIX_FMT_GRAY16BE:
133 case PIX_FMT_GRAY16LE:
134 case PIX_FMT_YUVJ420P:
135 case PIX_FMT_YUVJ422P:
136 case PIX_FMT_YUVJ444P:
137 case PIX_FMT_YUVA420P:
138 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
139 h_align= 16;
140 break;
141 case PIX_FMT_YUV411P:
142 case PIX_FMT_UYYVYY411:
143 w_align=32;
144 h_align=8;
145 break;
146 case PIX_FMT_YUV410P:
147 if(s->codec_id == CODEC_ID_SVQ1){
148 w_align=64;
149 h_align=64;
150 }
151 case PIX_FMT_RGB555:
152 if(s->codec_id == CODEC_ID_RPZA){
153 w_align=4;
154 h_align=4;
155 }
156 case PIX_FMT_PAL8:
157 case PIX_FMT_BGR8:
158 case PIX_FMT_RGB8:
159 if(s->codec_id == CODEC_ID_SMC){
160 w_align=4;
161 h_align=4;
162 }
163 break;
164 case PIX_FMT_BGR24:
165 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
166 w_align=4;
167 h_align=4;
168 }
169 break;
170 default:
171 w_align= 1;
172 h_align= 1;
173 break;
174 }
175
176 *width = ALIGN(*width , w_align);
177 *height= ALIGN(*height, h_align);
178 if(s->codec_id == CODEC_ID_H264)
179 *height+=2; // some of the optimized chroma MC reads one line too much
180 }
181
182 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
183 if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/4)
184 return 0;
185
186 av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
187 return -1;
188 }
189
190 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
191 int i;
192 int w= s->width;
193 int h= s->height;
194 InternalBuffer *buf;
195 int *picture_number;
196
197 if(pic->data[0]!=NULL) {
198 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
199 return -1;
200 }
201 if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
202 av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
203 return -1;
204 }
205
206 if(avcodec_check_dimensions(s,w,h))
207 return -1;
208
209 if(s->internal_buffer==NULL){
210 s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
211 }
212 #if 0
213 s->internal_buffer= av_fast_realloc(
214 s->internal_buffer,
215 &s->internal_buffer_size,
216 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
217 );
218 #endif
219
220 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
221 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
222 (*picture_number)++;
223
224 if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
225 for(i=0; i<4; i++){
226 av_freep(&buf->base[i]);
227 buf->data[i]= NULL;
228 }
229 }
230
231 if(buf->base[0]){
232 pic->age= *picture_number - buf->last_pic_num;
233 buf->last_pic_num= *picture_number;
234 }else{
235 int h_chroma_shift, v_chroma_shift;
236 int size[4] = {0};
237 int tmpsize;
238 AVPicture picture;
239 int stride_align[4];
240
241 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
242
243 avcodec_align_dimensions(s, &w, &h);
244
245 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
246 w+= EDGE_WIDTH*2;
247 h+= EDGE_WIDTH*2;
248 }
249
250 ff_fill_linesize(&picture, s->pix_fmt, w);
251
252 for (i=0; i<4; i++){
253 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
254 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
255 //picture size unneccessarily in some cases. The solution here is not
256 //pretty and better ideas are welcome!
257 #if HAVE_MMX
258 if(s->codec_id == CODEC_ID_SVQ1)
259 stride_align[i]= 16;
260 else
261 #endif
262 stride_align[i] = STRIDE_ALIGN;
263 picture.linesize[i] = ALIGN(picture.linesize[i], stride_align[i]);
264 }
265
266 tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
267
268 for (i=0; i<3 && picture.data[i+1]; i++)
269 size[i] = picture.data[i+1] - picture.data[i];
270 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
271
272 buf->last_pic_num= -256*256*256*64;
273 memset(buf->base, 0, sizeof(buf->base));
274 memset(buf->data, 0, sizeof(buf->data));
275
276 for(i=0; i<4 && size[i]; i++){
277 const int h_shift= i==0 ? 0 : h_chroma_shift;
278 const int v_shift= i==0 ? 0 : v_chroma_shift;
279
280 buf->linesize[i]= picture.linesize[i];
281
282 buf->base[i]= av_malloc(size[i]+16); //FIXME 16
283 if(buf->base[i]==NULL) return -1;
284 memset(buf->base[i], 128, size[i]);
285
286 // no edge if EDEG EMU or not planar YUV
287 if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
288 buf->data[i] = buf->base[i];
289 else
290 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
291 }
292 if(size[1] && !size[2])
293 ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
294 buf->width = s->width;
295 buf->height = s->height;
296 buf->pix_fmt= s->pix_fmt;
297 pic->age= 256*256*256*64;
298 }
299 pic->type= FF_BUFFER_TYPE_INTERNAL;
300
301 for(i=0; i<4; i++){
302 pic->base[i]= buf->base[i];
303 pic->data[i]= buf->data[i];
304 pic->linesize[i]= buf->linesize[i];
305 }
306 s->internal_buffer_count++;
307
308 pic->reordered_opaque= s->reordered_opaque;
309
310 if(s->debug&FF_DEBUG_BUFFERS)
311 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
312
313 return 0;
314 }
315
316 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
317 int i;
318 InternalBuffer *buf, *last;
319
320 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
321 assert(s->internal_buffer_count);
322
323 buf = NULL; /* avoids warning */
324 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
325 buf= &((InternalBuffer*)s->internal_buffer)[i];
326 if(buf->data[0] == pic->data[0])
327 break;
328 }
329 assert(i < s->internal_buffer_count);
330 s->internal_buffer_count--;
331 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
332
333 FFSWAP(InternalBuffer, *buf, *last);
334
335 for(i=0; i<4; i++){
336 pic->data[i]=NULL;
337 // pic->base[i]=NULL;
338 }
339 //printf("R%X\n", pic->opaque);
340
341 if(s->debug&FF_DEBUG_BUFFERS)
342 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
343 }
344
345 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
346 AVFrame temp_pic;
347 int i;
348
349 /* If no picture return a new buffer */
350 if(pic->data[0] == NULL) {
351 /* We will copy from buffer, so must be readable */
352 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
353 return s->get_buffer(s, pic);
354 }
355
356 /* If internal buffer type return the same buffer */
357 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
358 return 0;
359
360 /*
361 * Not internal type and reget_buffer not overridden, emulate cr buffer
362 */
363 temp_pic = *pic;
364 for(i = 0; i < 4; i++)
365 pic->data[i] = pic->base[i] = NULL;
366 pic->opaque = NULL;
367 /* Allocate new frame */
368 if (s->get_buffer(s, pic))
369 return -1;
370 /* Copy image data from old buffer to new buffer */
371 av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
372 s->height);
373 s->release_buffer(s, &temp_pic); // Release old frame
374 return 0;
375 }
376
377 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
378 int i;
379
380 for(i=0; i<count; i++){
381 int r= func(c, (char*)arg + i*size);
382 if(ret) ret[i]= r;
383 }
384 return 0;
385 }
386
387 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
388 return fmt[0];
389 }
390
391 void avcodec_get_frame_defaults(AVFrame *pic){
392 memset(pic, 0, sizeof(AVFrame));
393
394 pic->pts= AV_NOPTS_VALUE;
395 pic->key_frame= 1;
396 }
397
398 AVFrame *avcodec_alloc_frame(void){
399 AVFrame *pic= av_malloc(sizeof(AVFrame));
400
401 if(pic==NULL) return NULL;
402
403 avcodec_get_frame_defaults(pic);
404
405 return pic;
406 }
407
408 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
409 {
410 int ret= -1;
411
412 entangled_thread_counter++;
413 if(entangled_thread_counter != 1){
414 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
415 goto end;
416 }
417
418 if(avctx->codec || !codec)
419 goto end;
420
421 if (codec->priv_data_size > 0) {
422 avctx->priv_data = av_mallocz(codec->priv_data_size);
423 if (!avctx->priv_data) {
424 ret = AVERROR(ENOMEM);
425 goto end;
426 }
427 } else {
428 avctx->priv_data = NULL;
429 }
430
431 if(avctx->coded_width && avctx->coded_height)
432 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
433 else if(avctx->width && avctx->height)
434 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
435
436 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
437 av_freep(&avctx->priv_data);
438 ret = AVERROR(EINVAL);
439 goto end;
440 }
441
442 avctx->codec = codec;
443 avctx->codec_id = codec->id;
444 avctx->frame_number = 0;
445 if(avctx->codec->init){
446 ret = avctx->codec->init(avctx);
447 if (ret < 0) {
448 av_freep(&avctx->priv_data);
449 avctx->codec= NULL;
450 goto end;
451 }
452 }
453 ret=0;
454 end:
455 entangled_thread_counter--;
456 return ret;
457 }
458
459 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
460 const short *samples)
461 {
462 if(buf_size < FF_MIN_BUFFER_SIZE && 0){
463 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
464 return -1;
465 }
466 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
467 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
468 avctx->frame_number++;
469 return ret;
470 }else
471 return 0;
472 }
473
474 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
475 const AVFrame *pict)
476 {
477 if(buf_size < FF_MIN_BUFFER_SIZE){
478 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
479 return -1;
480 }
481 if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
482 return -1;
483 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
484 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
485 avctx->frame_number++;
486 emms_c(); //needed to avoid an emms_c() call before every return;
487
488 return ret;
489 }else
490 return 0;
491 }
492
493 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
494 const AVSubtitle *sub)
495 {
496 int ret;
497 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)sub);
498 avctx->frame_number++;
499 return ret;
500 }
501
502 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
503 int *got_picture_ptr,
504 const uint8_t *buf, int buf_size)
505 {
506 int ret;
507
508 *got_picture_ptr= 0;
509 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
510 return -1;
511 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
512 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
513 buf, buf_size);
514
515 emms_c(); //needed to avoid an emms_c() call before every return;
516
517 if (*got_picture_ptr)
518 avctx->frame_number++;
519 }else
520 ret= 0;
521
522 return ret;
523 }
524
525 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
526 int *frame_size_ptr,
527 const uint8_t *buf, int buf_size)
528 {
529 int ret;
530
531 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
532 //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
533 if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
534 av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
535 return -1;
536 }
537 if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
538 *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
539 av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
540 return -1;
541 }
542
543 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
544 buf, buf_size);
545 avctx->frame_number++;
546 }else{
547 ret= 0;
548 *frame_size_ptr=0;
549 }
550 return ret;
551 }
552
553 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
554 int *got_sub_ptr,
555 const uint8_t *buf, int buf_size)
556 {
557 int ret;
558
559 *got_sub_ptr = 0;
560 ret = avctx->codec->decode(avctx, sub, got_sub_ptr,
561 buf, buf_size);
562 if (*got_sub_ptr)
563 avctx->frame_number++;
564 return ret;
565 }
566
567 int avcodec_close(AVCodecContext *avctx)
568 {
569 entangled_thread_counter++;
570 if(entangled_thread_counter != 1){
571 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
572 entangled_thread_counter--;
573 return -1;
574 }
575
576 if (HAVE_THREADS && avctx->thread_opaque)
577 avcodec_thread_free(avctx);
578 if (avctx->codec->close)
579 avctx->codec->close(avctx);
580 avcodec_default_free_buffers(avctx);
581 av_freep(&avctx->priv_data);
582 avctx->codec = NULL;
583 entangled_thread_counter--;
584 return 0;
585 }
586
587 AVCodec *avcodec_find_encoder(enum CodecID id)
588 {
589 AVCodec *p;
590 p = first_avcodec;
591 while (p) {
592 if (p->encode != NULL && p->id == id)
593 return p;
594 p = p->next;
595 }
596 return NULL;
597 }
598
599 AVCodec *avcodec_find_encoder_by_name(const char *name)
600 {
601 AVCodec *p;
602 if (!name)
603 return NULL;
604 p = first_avcodec;
605 while (p) {
606 if (p->encode != NULL && strcmp(name,p->name) == 0)
607 return p;
608 p = p->next;
609 }
610 return NULL;
611 }
612
613 AVCodec *avcodec_find_decoder(enum CodecID id)
614 {
615 AVCodec *p;
616 p = first_avcodec;
617 while (p) {
618 if (p->decode != NULL && p->id == id)
619 return p;
620 p = p->next;
621 }
622 return NULL;
623 }
624
625 AVCodec *avcodec_find_decoder_by_name(const char *name)
626 {
627 AVCodec *p;
628 if (!name)
629 return NULL;
630 p = first_avcodec;
631 while (p) {
632 if (p->decode != NULL && strcmp(name,p->name) == 0)
633 return p;
634 p = p->next;
635 }
636 return NULL;
637 }
638
639 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
640 {
641 const char *codec_name;
642 AVCodec *p;
643 char buf1[32];
644 int bitrate;
645 AVRational display_aspect_ratio;
646
647 if (encode)
648 p = avcodec_find_encoder(enc->codec_id);
649 else
650 p = avcodec_find_decoder(enc->codec_id);
651
652 if (p) {
653 codec_name = p->name;
654 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
655 /* fake mpeg2 transport stream codec (currently not
656 registered) */
657 codec_name = "mpeg2ts";
658 } else if (enc->codec_name[0] != '\0') {
659 codec_name = enc->codec_name;
660 } else {
661 /* output avi tags */
662 if( isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
663 && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
664 snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
665 enc->codec_tag & 0xff,
666 (enc->codec_tag >> 8) & 0xff,
667 (enc->codec_tag >> 16) & 0xff,
668 (enc->codec_tag >> 24) & 0xff,
669 enc->codec_tag);
670 } else {
671 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
672 }
673 codec_name = buf1;
674 }
675
676 switch(enc->codec_type) {
677 case CODEC_TYPE_VIDEO:
678 snprintf(buf, buf_size,
679 "Video: %s%s",
680 codec_name, enc->mb_decision ? " (hq)" : "");
681 if (enc->pix_fmt != PIX_FMT_NONE) {
682 snprintf(buf + strlen(buf), buf_size - strlen(buf),
683 ", %s",
684 avcodec_get_pix_fmt_name(enc->pix_fmt));
685 }
686 if (enc->width) {
687 snprintf(buf + strlen(buf), buf_size - strlen(buf),
688 ", %dx%d",
689 enc->width, enc->height);
690 if (enc->sample_aspect_ratio.num) {
691 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
692 enc->width*enc->sample_aspect_ratio.num,
693 enc->height*enc->sample_aspect_ratio.den,
694 1024*1024);
695 snprintf(buf + strlen(buf), buf_size - strlen(buf),
696 " [PAR %d:%d DAR %d:%d]",
697 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
698 display_aspect_ratio.num, display_aspect_ratio.den);
699 }
700 if(av_log_get_level() >= AV_LOG_DEBUG){
701 int g= av_gcd(enc->time_base.num, enc->time_base.den);
702 snprintf(buf + strlen(buf), buf_size - strlen(buf),
703 ", %d/%d",
704 enc->time_base.num/g, enc->time_base.den/g);
705 }
706 }
707 if (encode) {
708 snprintf(buf + strlen(buf), buf_size - strlen(buf),
709 ", q=%d-%d", enc->qmin, enc->qmax);
710 }
711 bitrate = enc->bit_rate;
712 break;
713 case CODEC_TYPE_AUDIO:
714 snprintf(buf, buf_size,
715 "Audio: %s",
716 codec_name);
717 if (enc->sample_rate) {
718 snprintf(buf + strlen(buf), buf_size - strlen(buf),
719 ", %d Hz", enc->sample_rate);
720 }
721 av_strlcat(buf, ", ", buf_size);
722 avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
723 if (enc->sample_fmt != SAMPLE_FMT_NONE) {
724 snprintf(buf + strlen(buf), buf_size - strlen(buf),
725 ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
726 }
727
728 /* for PCM codecs, compute bitrate directly */
729 switch(enc->codec_id) {
730 case CODEC_ID_PCM_F64BE:
731 case CODEC_ID_PCM_F64LE:
732 bitrate = enc->sample_rate * enc->channels * 64;
733 break;
734 case CODEC_ID_PCM_S32LE:
735 case CODEC_ID_PCM_S32BE:
736 case CODEC_ID_PCM_U32LE:
737 case CODEC_ID_PCM_U32BE:
738 case CODEC_ID_PCM_F32BE:
739 case CODEC_ID_PCM_F32LE:
740 bitrate = enc->sample_rate * enc->channels * 32;
741 break;
742 case CODEC_ID_PCM_S24LE:
743 case CODEC_ID_PCM_S24BE:
744 case CODEC_ID_PCM_U24LE:
745 case CODEC_ID_PCM_U24BE:
746 case CODEC_ID_PCM_S24DAUD:
747 bitrate = enc->sample_rate * enc->channels * 24;
748 break;
749 case CODEC_ID_PCM_S16LE:
750 case CODEC_ID_PCM_S16BE:
751 case CODEC_ID_PCM_S16LE_PLANAR:
752 case CODEC_ID_PCM_U16LE:
753 case CODEC_ID_PCM_U16BE:
754 bitrate = enc->sample_rate * enc->channels * 16;
755 break;
756 case CODEC_ID_PCM_S8:
757 case CODEC_ID_PCM_U8:
758 case CODEC_ID_PCM_ALAW:
759 case CODEC_ID_PCM_MULAW:
760 case CODEC_ID_PCM_ZORK:
761 bitrate = enc->sample_rate * enc->channels * 8;
762 break;
763 default:
764 bitrate = enc->bit_rate;
765 break;
766 }
767 break;
768 case CODEC_TYPE_DATA:
769 snprintf(buf, buf_size, "Data: %s", codec_name);
770 bitrate = enc->bit_rate;
771 break;
772 case CODEC_TYPE_SUBTITLE:
773 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
774 bitrate = enc->bit_rate;
775 break;
776 case CODEC_TYPE_ATTACHMENT:
777 snprintf(buf, buf_size, "Attachment: %s", codec_name);
778 bitrate = enc->bit_rate;
779 break;
780 default:
781 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
782 return;
783 }
784 if (encode) {
785 if (enc->flags & CODEC_FLAG_PASS1)
786 snprintf(buf + strlen(buf), buf_size - strlen(buf),
787 ", pass 1");
788 if (enc->flags & CODEC_FLAG_PASS2)
789 snprintf(buf + strlen(buf), buf_size - strlen(buf),
790 ", pass 2");
791 }
792 if (bitrate != 0) {
793 snprintf(buf + strlen(buf), buf_size - strlen(buf),
794 ", %d kb/s", bitrate / 1000);
795 }
796 }
797
798 unsigned avcodec_version( void )
799 {
800 return LIBAVCODEC_VERSION_INT;
801 }
802
803 void avcodec_init(void)
804 {
805 static int initialized = 0;
806
807 if (initialized != 0)
808 return;
809 initialized = 1;
810
811 dsputil_static_init();
812 }
813
814 void avcodec_flush_buffers(AVCodecContext *avctx)
815 {
816 if(avctx->codec->flush)
817 avctx->codec->flush(avctx);
818 }
819
820 void avcodec_default_free_buffers(AVCodecContext *s){
821 int i, j;
822
823 if(s->internal_buffer==NULL) return;
824
825 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
826 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
827 for(j=0; j<4; j++){
828 av_freep(&buf->base[j]);
829 buf->data[j]= NULL;
830 }
831 }
832 av_freep(&s->internal_buffer);
833
834 s->internal_buffer_count=0;
835 }
836
837 char av_get_pict_type_char(int pict_type){
838 switch(pict_type){
839 case FF_I_TYPE: return 'I';
840 case FF_P_TYPE: return 'P';
841 case FF_B_TYPE: return 'B';
842 case FF_S_TYPE: return 'S';
843 case FF_SI_TYPE:return 'i';
844 case FF_SP_TYPE:return 'p';
845 case FF_BI_TYPE:return 'b';
846 default: return '?';
847 }
848 }
849
850 int av_get_bits_per_sample(enum CodecID codec_id){
851 switch(codec_id){
852 case CODEC_ID_ADPCM_SBPRO_2:
853 return 2;
854 case CODEC_ID_ADPCM_SBPRO_3:
855 return 3;
856 case CODEC_ID_ADPCM_SBPRO_4:
857 case CODEC_ID_ADPCM_CT:
858 return 4;
859 case CODEC_ID_PCM_ALAW:
860 case CODEC_ID_PCM_MULAW:
861 case CODEC_ID_PCM_S8:
862 case CODEC_ID_PCM_U8:
863 case CODEC_ID_PCM_ZORK:
864 return 8;
865 case CODEC_ID_PCM_S16BE:
866 case CODEC_ID_PCM_S16LE:
867 case CODEC_ID_PCM_S16LE_PLANAR:
868 case CODEC_ID_PCM_U16BE:
869 case CODEC_ID_PCM_U16LE:
870 return 16;
871 case CODEC_ID_PCM_S24DAUD:
872 case CODEC_ID_PCM_S24BE:
873 case CODEC_ID_PCM_S24LE:
874 case CODEC_ID_PCM_U24BE:
875 case CODEC_ID_PCM_U24LE:
876 return 24;
877 case CODEC_ID_PCM_S32BE:
878 case CODEC_ID_PCM_S32LE:
879 case CODEC_ID_PCM_U32BE:
880 case CODEC_ID_PCM_U32LE:
881 case CODEC_ID_PCM_F32BE:
882 case CODEC_ID_PCM_F32LE:
883 return 32;
884 case CODEC_ID_PCM_F64BE:
885 case CODEC_ID_PCM_F64LE:
886 return 64;
887 default:
888 return 0;
889 }
890 }
891
892 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
893 switch (sample_fmt) {
894 case SAMPLE_FMT_U8:
895 return 8;
896 case SAMPLE_FMT_S16:
897 return 16;
898 case SAMPLE_FMT_S32:
899 case SAMPLE_FMT_FLT:
900 return 32;
901 case SAMPLE_FMT_DBL:
902 return 64;
903 default:
904 return 0;
905 }
906 }
907
908 #if !HAVE_THREADS
909 int avcodec_thread_init(AVCodecContext *s, int thread_count){
910 return -1;
911 }
912 #endif
913
914 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
915 {
916 unsigned int n = 0;
917
918 while(v >= 0xff) {
919 *s++ = 0xff;
920 v -= 0xff;
921 n++;
922 }
923 *s = v;
924 n++;
925 return n;
926 }
927
928 /* Wrapper to work around the lack of mkstemp() on mingw/cygin.
929 * Also, tries to create file in /tmp first, if possible.
930 * *prefix can be a character constant; *filename will be allocated internally.
931 * Returns file descriptor of opened file (or -1 on error)
932 * and opened file name in **filename. */
933 int av_tempfile(char *prefix, char **filename) {
934 int fd=-1;
935 #if !HAVE_MKSTEMP
936 *filename = tempnam(".", prefix);
937 #else
938 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
939 *filename = av_malloc(len);
940 #endif
941 /* -----common section-----*/
942 if (*filename == NULL) {
943 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
944 return -1;
945 }
946 #if !HAVE_MKSTEMP
947 fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
948 #else
949 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
950 fd = mkstemp(*filename);
951 if (fd < 0) {
952 snprintf(*filename, len, "./%sXXXXXX", prefix);
953 fd = mkstemp(*filename);
954 }
955 #endif
956 /* -----common section-----*/
957 if (fd < 0) {
958 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
959 return -1;
960 }
961 return fd; /* success */
962 }
963
964 typedef struct {
965 const char *abbr;
966 int width, height;
967 } VideoFrameSizeAbbr;
968
969 typedef struct {
970 const char *abbr;
971 int rate_num, rate_den;
972 } VideoFrameRateAbbr;
973
974 static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
975 { "ntsc", 720, 480 },
976 { "pal", 720, 576 },
977 { "qntsc", 352, 240 }, /* VCD compliant NTSC */
978 { "qpal", 352, 288 }, /* VCD compliant PAL */
979 { "sntsc", 640, 480 }, /* square pixel NTSC */
980 { "spal", 768, 576 }, /* square pixel PAL */
981 { "film", 352, 240 },
982 { "ntsc-film", 352, 240 },
983 { "sqcif", 128, 96 },
984 { "qcif", 176, 144 },
985 { "cif", 352, 288 },
986 { "4cif", 704, 576 },
987 { "qqvga", 160, 120 },
988 { "qvga", 320, 240 },
989 { "vga", 640, 480 },
990 { "svga", 800, 600 },
991 { "xga", 1024, 768 },
992 { "uxga", 1600,1200 },
993 { "qxga", 2048,1536 },
994 { "sxga", 1280,1024 },
995 { "qsxga", 2560,2048 },
996 { "hsxga", 5120,4096 },
997 { "wvga", 852, 480 },
998 { "wxga", 1366, 768 },
999 { "wsxga", 1600,1024 },
1000 { "wuxga", 1920,1200 },
1001 { "woxga", 2560,1600 },
1002 { "wqsxga", 3200,2048 },
1003 { "wquxga", 3840,2400 },
1004 { "whsxga", 6400,4096 },
1005 { "whuxga", 7680,4800 },
1006 { "cga", 320, 200 },
1007 { "ega", 640, 350 },
1008 { "hd480", 852, 480 },
1009 { "hd720", 1280, 720 },
1010 { "hd1080", 1920,1080 },
1011 };
1012
1013 static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1014 { "ntsc", 30000, 1001 },
1015 { "pal", 25, 1 },
1016 { "qntsc", 30000, 1001 }, /* VCD compliant NTSC */
1017 { "qpal", 25, 1 }, /* VCD compliant PAL */
1018 { "sntsc", 30000, 1001 }, /* square pixel NTSC */
1019 { "spal", 25, 1 }, /* square pixel PAL */
1020 { "film", 24, 1 },
1021 { "ntsc-film", 24000, 1001 },
1022 };
1023
1024 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1025 {
1026 int i;
1027 int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1028 const char *p;
1029 int frame_width = 0, frame_height = 0;
1030
1031 for(i=0;i<n;i++) {
1032 if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1033 frame_width = video_frame_size_abbrs[i].width;
1034 frame_height = video_frame_size_abbrs[i].height;
1035 break;
1036 }
1037 }
1038 if (i == n) {
1039 p = str;
1040 frame_width = strtol(p, (char **)&p, 10);
1041 if (*p)
1042 p++;
1043 frame_height = strtol(p, (char **)&p, 10);
1044 }
1045 if (frame_width <= 0 || frame_height <= 0)
1046 return -1;
1047 *width_ptr = frame_width;
1048 *height_ptr = frame_height;
1049 return 0;
1050 }
1051
1052 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1053 {
1054 int i;
1055 int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1056 char* cp;
1057
1058 /* First, we check our abbreviation table */
1059 for (i = 0; i < n; ++i)
1060 if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1061 frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1062 frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1063 return 0;
1064 }
1065
1066 /* Then, we try to parse it as fraction */
1067 cp = strchr(arg, '/');
1068 if (!cp)
1069 cp = strchr(arg, ':');
1070 if (cp) {
1071 char* cpp;
1072 frame_rate->num = strtol(arg, &cpp, 10);
1073 if (cpp != arg || cpp == cp)
1074 frame_rate->den = strtol(cp+1, &cpp, 10);
1075 else
1076 frame_rate->num = 0;
1077 }
1078 else {
1079 /* Finally we give up and parse it as double */
1080 AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1081 frame_rate->den = time_base.den;
1082 frame_rate->num = time_base.num;
1083 }
1084 if (!frame_rate->num || !frame_rate->den)
1085 return -1;
1086 else
1087 return 0;
1088 }
1089
1090 void ff_log_missing_feature(void *avc, const char *feature, int want_sample)
1091 {
1092 av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1093 "version to the newest one from SVN. If the problem still "
1094 "occurs, it means that your file has a feature which has not "
1095 "been implemented.", feature);
1096 if(want_sample)
1097 ff_log_ask_for_sample(avc, NULL);
1098 else
1099 av_log(avc, AV_LOG_WARNING, "\n");
1100 }
1101
1102 void ff_log_ask_for_sample(void *avc, const char *msg)
1103 {
1104 if (msg)
1105 av_log(avc, AV_LOG_WARNING, "%s ", msg);
1106 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1107 "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1108 "and contact the ffmpeg-devel mailing list.\n");
1109 }