support url_read which reads less then requested patch by (Leon van Stuivenberg ...
[libav.git] / libavcodec / utils.c
CommitLineData
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1/*
2 * utils for libavcodec
ff4ec49e 3 * Copyright (c) 2001 Fabrice Bellard.
9b879566 4 * Copyright (c) 2003 Michel Bardiaux for the av_log API
8f2ab833 5 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
de6d9b64 6 *
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7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
de6d9b64 11 *
ff4ec49e 12 * This library is distributed in the hope that it will be useful,
de6d9b64 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
de6d9b64 16 *
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17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
de6d9b64 20 */
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21
22/**
23 * @file utils.c
24 * utils.
25 */
26
de6d9b64 27#include "avcodec.h"
3123dd79 28#include "dsputil.h"
1c2a8c7f 29#include "mpegvideo.h"
9b879566 30#include <stdarg.h>
de6d9b64 31
18f77016 32void *av_mallocz(unsigned int size)
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33{
34 void *ptr;
5b20b732 35
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36 ptr = av_malloc(size);
37 if (!ptr)
38 return NULL;
39 memset(ptr, 0, size);
40 return ptr;
41}
42
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43char *av_strdup(const char *s)
44{
45 char *ptr;
46 int len;
47 len = strlen(s) + 1;
48 ptr = av_malloc(len);
49 if (!ptr)
50 return NULL;
51 memcpy(ptr, s, len);
52 return ptr;
53}
54
55/**
56 * realloc which does nothing if the block is large enough
57 */
5c91a675 58void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
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59{
60 if(min_size < *size)
61 return ptr;
62
63 *size= min_size + 10*1024;
64
65 return av_realloc(ptr, *size);
66}
67
68
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69/* allocation of static arrays - do not use for normal allocation */
70static unsigned int last_static = 0;
71static char*** array_static = NULL;
72static const unsigned int grow_static = 64; // ^2
73void *__av_mallocz_static(void** location, unsigned int size)
74{
5c91a675 75 unsigned int l = (last_static + grow_static) & ~(grow_static - 1);
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76 void *ptr = av_mallocz(size);
77 if (!ptr)
78 return NULL;
79
80 if (location)
81 {
82 if (l > last_static)
8e1e6f31 83 array_static = av_realloc(array_static, l);
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84 array_static[last_static++] = (char**) location;
85 *location = ptr;
86 }
87 return ptr;
88}
89/* free all static arrays and reset pointers to 0 */
4cfbf61b 90void av_free_static(void)
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91{
92 if (array_static)
93 {
94 unsigned i;
95 for (i = 0; i < last_static; i++)
96 {
8e1e6f31 97 av_free(*array_static[i]);
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98 *array_static[i] = NULL;
99 }
8e1e6f31 100 av_free(array_static);
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101 array_static = 0;
102 }
103 last_static = 0;
104}
105
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106/**
107 * Frees memory and sets the pointer to NULL.
108 * @param arg pointer to the pointer which should be freed
109 */
110void av_freep(void *arg)
4d7a0a05 111{
81c5f887 112 void **ptr= (void**)arg;
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113 av_free(*ptr);
114 *ptr = NULL;
115}
116
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117/* encoder management */
118AVCodec *first_avcodec;
119
120void register_avcodec(AVCodec *format)
121{
122 AVCodec **p;
123 p = &first_avcodec;
124 while (*p != NULL) p = &(*p)->next;
125 *p = format;
126 format->next = NULL;
127}
128
d90cf87b 129typedef struct InternalBuffer{
1e491e29 130 int last_pic_num;
d90cf87b 131 uint8_t *base[4];
1e491e29 132 uint8_t *data[4];
237e4938 133 int linesize[4];
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134}InternalBuffer;
135
136#define INTERNAL_BUFFER_SIZE 32
1e491e29 137
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138#define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
139
140void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
141 int w_align= 1;
142 int h_align= 1;
143
144 switch(s->pix_fmt){
145 case PIX_FMT_YUV420P:
146 case PIX_FMT_YUV422:
147 case PIX_FMT_YUV422P:
148 case PIX_FMT_YUV444P:
149 case PIX_FMT_GRAY8:
150 case PIX_FMT_YUVJ420P:
151 case PIX_FMT_YUVJ422P:
152 case PIX_FMT_YUVJ444P:
153 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
154 h_align= 16;
155 break;
156 case PIX_FMT_YUV411P:
157 w_align=32;
158 h_align=8;
159 break;
160 case PIX_FMT_YUV410P:
161 if(s->codec_id == CODEC_ID_SVQ1){
162 w_align=64;
163 h_align=64;
164 }
165 break;
166 default:
167 w_align= 1;
168 h_align= 1;
169 break;
170 }
171
172 *width = ALIGN(*width , w_align);
173 *height= ALIGN(*height, h_align);
174}
175
492cd3a9 176int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 177 int i;
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178 int w= s->width;
179 int h= s->height;
d90cf87b 180 InternalBuffer *buf;
237e4938 181 int *picture_number;
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182
183 assert(pic->data[0]==NULL);
d90cf87b 184 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
1e491e29 185
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186 if(s->internal_buffer==NULL){
187 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
188 }
189#if 0
190 s->internal_buffer= av_fast_realloc(
191 s->internal_buffer,
192 &s->internal_buffer_size,
193 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
194 );
195#endif
196
197 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
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198 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
199 (*picture_number)++;
200
d90cf87b 201 if(buf->base[0]){
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202 pic->age= *picture_number - buf->last_pic_num;
203 buf->last_pic_num= *picture_number;
1e491e29 204 }else{
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205 int h_chroma_shift, v_chroma_shift;
206 int s_align, pixel_size;
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207
208 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
f0bbfc4a 209
1e491e29 210 switch(s->pix_fmt){
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211 case PIX_FMT_RGB555:
212 case PIX_FMT_RGB565:
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213 case PIX_FMT_YUV422:
214 pixel_size=2;
215 break;
216 case PIX_FMT_RGB24:
217 case PIX_FMT_BGR24:
218 pixel_size=3;
219 break;
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220 case PIX_FMT_RGBA32:
221 pixel_size=4;
222 break;
223 default:
224 pixel_size=1;
225 }
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226
227 avcodec_align_dimensions(s, &w, &h);
228#if defined(ARCH_POWERPC) || defined(HAVE_MMI) //FIXME some cleaner check
229 s_align= 16;
230#else
231 s_align= 8;
232#endif
233
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234 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
235 w+= EDGE_WIDTH*2;
236 h+= EDGE_WIDTH*2;
237 }
238
d90cf87b 239 buf->last_pic_num= -256*256*256*64;
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240
241 for(i=0; i<3; i++){
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242 const int h_shift= i==0 ? 0 : h_chroma_shift;
243 const int v_shift= i==0 ? 0 : v_chroma_shift;
1e491e29 244
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245 //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
246 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, s_align<<(h_chroma_shift-h_shift));
1e491e29 247
237e4938 248 buf->base[i]= av_mallocz((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
d90cf87b 249 if(buf->base[i]==NULL) return -1;
237e4938 250 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
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251
252 if(s->flags&CODEC_FLAG_EMU_EDGE)
d90cf87b 253 buf->data[i] = buf->base[i];
1e491e29 254 else
237e4938 255 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), s_align);
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256 }
257 pic->age= 256*256*256*64;
258 }
237e4938 259 pic->type= FF_BUFFER_TYPE_INTERNAL;
1e491e29 260
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261 for(i=0; i<4; i++){
262 pic->base[i]= buf->base[i];
263 pic->data[i]= buf->data[i];
237e4938 264 pic->linesize[i]= buf->linesize[i];
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265 }
266 s->internal_buffer_count++;
267
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268 return 0;
269}
270
492cd3a9 271void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 272 int i;
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273 InternalBuffer *buf, *last, temp;
274
4e00e76b 275 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
59c673d5 276 assert(s->internal_buffer_count);
d90cf87b 277
b1609412 278 buf = NULL; /* avoids warning */
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279 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
280 buf= &((InternalBuffer*)s->internal_buffer)[i];
281 if(buf->data[0] == pic->data[0])
282 break;
283 }
284 assert(i < s->internal_buffer_count);
285 s->internal_buffer_count--;
286 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
287
288 temp= *buf;
289 *buf= *last;
290 *last= temp;
291
292 for(i=0; i<3; i++){
1e491e29 293 pic->data[i]=NULL;
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294// pic->base[i]=NULL;
295 }
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296//printf("R%X\n", pic->opaque);
297}
298
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299int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
300 AVFrame temp_pic;
301 int i;
302
303 /* If no picture return a new buffer */
304 if(pic->data[0] == NULL) {
305 /* We will copy from buffer, so must be readable */
306 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
307 return s->get_buffer(s, pic);
308 }
309
310 /* If internal buffer type return the same buffer */
311 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
312 return 0;
313
314 /*
315 * Not internal type and reget_buffer not overridden, emulate cr buffer
316 */
317 temp_pic = *pic;
318 for(i = 0; i < 4; i++)
319 pic->data[i] = pic->base[i] = NULL;
320 pic->opaque = NULL;
321 /* Allocate new frame */
322 if (s->get_buffer(s, pic))
323 return -1;
324 /* Copy image data from old buffer to new buffer */
325 img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
326 s->height);
327 s->release_buffer(s, &temp_pic); // Release old frame
328 return 0;
329}
330
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331int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
332 int i;
333
334 for(i=0; i<count; i++){
335 int r= func(c, arg[i]);
336 if(ret) ret[i]= r;
337 }
338 return 0;
339}
340
494c56d3 341enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
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342 return fmt[0];
343}
344
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345static const char* context_to_name(void* ptr) {
346 AVCodecContext *avc= ptr;
347
348 if(avc && avc->codec && avc->codec->name)
349 return avc->codec->name;
350 else
351 return "NULL";
352}
353
354static AVClass av_codec_context_class = { "AVCodecContext", context_to_name };
355
a949d72e 356void avcodec_get_context_defaults(AVCodecContext *s){
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357 memset(s, 0, sizeof(AVCodecContext));
358
43465395 359 s->av_class= &av_codec_context_class;
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360 s->bit_rate= 800*1000;
361 s->bit_rate_tolerance= s->bit_rate*10;
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362 s->qmin= 2;
363 s->qmax= 31;
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364 s->mb_qmin= 2;
365 s->mb_qmax= 31;
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366 s->rc_eq= "tex^qComp";
367 s->qcompress= 0.5;
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368 s->max_qdiff= 3;
369 s->b_quant_factor=1.25;
370 s->b_quant_offset=1.25;
b3a391e8 371 s->i_quant_factor=-0.8;
e8b62df6 372 s->i_quant_offset=0.0;
4d2858de 373 s->error_concealment= 3;
8d0e42ca 374 s->error_resilience= 1;
4d2858de 375 s->workaround_bugs= FF_BUG_AUTODETECT;
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376 s->frame_rate_base= 1;
377 s->frame_rate = 25;
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378 s->gop_size= 50;
379 s->me_method= ME_EPZS;
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380 s->get_buffer= avcodec_default_get_buffer;
381 s->release_buffer= avcodec_default_release_buffer;
a33c7159 382 s->get_format= avcodec_default_get_format;
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383 s->execute= avcodec_default_execute;
384 s->thread_count=1;
826f429a 385 s->me_subpel_quality=8;
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386 s->lmin= FF_QP2LAMBDA * s->qmin;
387 s->lmax= FF_QP2LAMBDA * s->qmax;
5ff85f1d 388 s->sample_aspect_ratio= (AVRational){0,1};
620fe604 389 s->ildct_cmp= FF_CMP_VSAD;
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390
391 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
392 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
2a2bbcb0 393 s->palctrl = NULL;
e1c2a5a0 394 s->reget_buffer= avcodec_default_reget_buffer;
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395}
396
397/**
398 * allocates a AVCodecContext and set it to defaults.
399 * this can be deallocated by simply calling free()
400 */
7ffbb60e 401AVCodecContext *avcodec_alloc_context(void){
9740beff 402 AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
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403
404 if(avctx==NULL) return NULL;
405
406 avcodec_get_context_defaults(avctx);
407
408 return avctx;
409}
410
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411void avcodec_get_frame_defaults(AVFrame *pic){
412 memset(pic, 0, sizeof(AVFrame));
413
414 pic->pts= AV_NOPTS_VALUE;
415}
416
1e491e29 417/**
492cd3a9 418 * allocates a AVPFrame and set it to defaults.
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419 * this can be deallocated by simply calling free()
420 */
492cd3a9 421AVFrame *avcodec_alloc_frame(void){
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422 AVFrame *pic= av_malloc(sizeof(AVFrame));
423
424 if(pic==NULL) return NULL;
425
426 avcodec_get_frame_defaults(pic);
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427
428 return pic;
429}
430
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431int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
432{
433 int ret;
434
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435 if(avctx->codec)
436 return -1;
437
de6d9b64 438 avctx->codec = codec;
4cb3ca72 439 avctx->codec_id = codec->id;
de6d9b64 440 avctx->frame_number = 0;
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441 if (codec->priv_data_size > 0) {
442 avctx->priv_data = av_mallocz(codec->priv_data_size);
443 if (!avctx->priv_data)
444 return -ENOMEM;
445 } else {
446 avctx->priv_data = NULL;
447 }
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448 ret = avctx->codec->init(avctx);
449 if (ret < 0) {
3123dd79 450 av_freep(&avctx->priv_data);
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451 return ret;
452 }
453 return 0;
454}
455
0c1a9eda 456int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
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457 const short *samples)
458{
459 int ret;
460
461 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
462 avctx->frame_number++;
463 return ret;
464}
465
0c1a9eda 466int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
492cd3a9 467 const AVFrame *pict)
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468{
469 int ret;
470
471 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
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472
473 emms_c(); //needed to avoid a emms_c() call before every return;
474
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475 avctx->frame_number++;
476 return ret;
477}
478
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479/**
480 * decode a frame.
481 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
482 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
483 * @param buf_size the size of the buffer in bytes
484 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
485 * @return -1 if error, otherwise return the number of
486 * bytes used.
487 */
492cd3a9 488int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
de6d9b64 489 int *got_picture_ptr,
0c1a9eda 490 uint8_t *buf, int buf_size)
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491{
492 int ret;
1e491e29 493
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494 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
495 buf, buf_size);
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496
497 emms_c(); //needed to avoid a emms_c() call before every return;
1e491e29 498
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499 if (*got_picture_ptr)
500 avctx->frame_number++;
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501 return ret;
502}
503
504/* decode an audio frame. return -1 if error, otherwise return the
505 *number of bytes used. If no frame could be decompressed,
506 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
507 *size in BYTES. */
0c1a9eda 508int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
de6d9b64 509 int *frame_size_ptr,
0c1a9eda 510 uint8_t *buf, int buf_size)
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511{
512 int ret;
513
514 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
515 buf, buf_size);
516 avctx->frame_number++;
517 return ret;
518}
519
520int avcodec_close(AVCodecContext *avctx)
521{
522 if (avctx->codec->close)
523 avctx->codec->close(avctx);
3123dd79 524 av_freep(&avctx->priv_data);
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525 avctx->codec = NULL;
526 return 0;
527}
528
529AVCodec *avcodec_find_encoder(enum CodecID id)
530{
531 AVCodec *p;
532 p = first_avcodec;
533 while (p) {
534 if (p->encode != NULL && p->id == id)
535 return p;
536 p = p->next;
537 }
538 return NULL;
539}
540
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541AVCodec *avcodec_find_encoder_by_name(const char *name)
542{
543 AVCodec *p;
544 p = first_avcodec;
545 while (p) {
546 if (p->encode != NULL && strcmp(name,p->name) == 0)
547 return p;
548 p = p->next;
549 }
550 return NULL;
551}
552
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553AVCodec *avcodec_find_decoder(enum CodecID id)
554{
555 AVCodec *p;
556 p = first_avcodec;
557 while (p) {
558 if (p->decode != NULL && p->id == id)
559 return p;
560 p = p->next;
561 }
562 return NULL;
563}
564
565AVCodec *avcodec_find_decoder_by_name(const char *name)
566{
567 AVCodec *p;
568 p = first_avcodec;
569 while (p) {
570 if (p->decode != NULL && strcmp(name,p->name) == 0)
571 return p;
572 p = p->next;
573 }
574 return NULL;
575}
576
577AVCodec *avcodec_find(enum CodecID id)
578{
579 AVCodec *p;
580 p = first_avcodec;
581 while (p) {
582 if (p->id == id)
583 return p;
584 p = p->next;
585 }
586 return NULL;
587}
588
589void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
590{
591 const char *codec_name;
592 AVCodec *p;
593 char buf1[32];
623563c0 594 char channels_str[100];
a96b68b7 595 int bitrate;
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596
597 if (encode)
598 p = avcodec_find_encoder(enc->codec_id);
599 else
600 p = avcodec_find_decoder(enc->codec_id);
601
602 if (p) {
603 codec_name = p->name;
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604 if (!encode && enc->codec_id == CODEC_ID_MP3) {
605 if (enc->sub_id == 2)
606 codec_name = "mp2";
607 else if (enc->sub_id == 1)
608 codec_name = "mp1";
609 }
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610 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
611 /* fake mpeg2 transport stream codec (currently not
612 registered) */
613 codec_name = "mpeg2ts";
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614 } else if (enc->codec_name[0] != '\0') {
615 codec_name = enc->codec_name;
616 } else {
617 /* output avi tags */
618 if (enc->codec_type == CODEC_TYPE_VIDEO) {
619 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
620 enc->codec_tag & 0xff,
621 (enc->codec_tag >> 8) & 0xff,
622 (enc->codec_tag >> 16) & 0xff,
623 (enc->codec_tag >> 24) & 0xff);
624 } else {
625 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
626 }
627 codec_name = buf1;
628 }
629
630 switch(enc->codec_type) {
631 case CODEC_TYPE_VIDEO:
632 snprintf(buf, buf_size,
633 "Video: %s%s",
7d1c3fc1 634 codec_name, enc->mb_decision ? " (hq)" : "");
cf087595
FB
635 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
636 snprintf(buf + strlen(buf), buf_size - strlen(buf),
637 ", %s",
9bbffbb1 638 avcodec_get_pix_fmt_name(enc->pix_fmt));
cf087595 639 }
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FB
640 if (enc->width) {
641 snprintf(buf + strlen(buf), buf_size - strlen(buf),
642 ", %dx%d, %0.2f fps",
643 enc->width, enc->height,
14bea432 644 (float)enc->frame_rate / enc->frame_rate_base);
de6d9b64 645 }
4bfad535
FB
646 if (encode) {
647 snprintf(buf + strlen(buf), buf_size - strlen(buf),
648 ", q=%d-%d", enc->qmin, enc->qmax);
649 }
a96b68b7 650 bitrate = enc->bit_rate;
de6d9b64
FB
651 break;
652 case CODEC_TYPE_AUDIO:
653 snprintf(buf, buf_size,
654 "Audio: %s",
655 codec_name);
e0d2714a
J
656 switch (enc->channels) {
657 case 1:
623563c0 658 strcpy(channels_str, "mono");
e0d2714a
J
659 break;
660 case 2:
623563c0 661 strcpy(channels_str, "stereo");
e0d2714a
J
662 break;
663 case 6:
623563c0 664 strcpy(channels_str, "5:1");
e0d2714a
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665 break;
666 default:
667 sprintf(channels_str, "%d channels", enc->channels);
668 break;
669 }
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670 if (enc->sample_rate) {
671 snprintf(buf + strlen(buf), buf_size - strlen(buf),
672 ", %d Hz, %s",
673 enc->sample_rate,
e0d2714a 674 channels_str);
de6d9b64 675 }
e0d2714a 676
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677 /* for PCM codecs, compute bitrate directly */
678 switch(enc->codec_id) {
679 case CODEC_ID_PCM_S16LE:
680 case CODEC_ID_PCM_S16BE:
681 case CODEC_ID_PCM_U16LE:
682 case CODEC_ID_PCM_U16BE:
a190b7e9 683 bitrate = enc->sample_rate * enc->channels * 16;
a96b68b7
FB
684 break;
685 case CODEC_ID_PCM_S8:
686 case CODEC_ID_PCM_U8:
687 case CODEC_ID_PCM_ALAW:
688 case CODEC_ID_PCM_MULAW:
a190b7e9 689 bitrate = enc->sample_rate * enc->channels * 8;
a96b68b7
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690 break;
691 default:
692 bitrate = enc->bit_rate;
693 break;
694 }
de6d9b64 695 break;
985180a1
FB
696 case CODEC_TYPE_DATA:
697 snprintf(buf, buf_size, "Data: %s", codec_name);
698 bitrate = enc->bit_rate;
699 break;
de6d9b64 700 default:
b71472eb 701 av_abort();
de6d9b64 702 }
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703 if (encode) {
704 if (enc->flags & CODEC_FLAG_PASS1)
705 snprintf(buf + strlen(buf), buf_size - strlen(buf),
706 ", pass 1");
707 if (enc->flags & CODEC_FLAG_PASS2)
708 snprintf(buf + strlen(buf), buf_size - strlen(buf),
709 ", pass 2");
710 }
a96b68b7 711 if (bitrate != 0) {
de6d9b64 712 snprintf(buf + strlen(buf), buf_size - strlen(buf),
a96b68b7 713 ", %d kb/s", bitrate / 1000);
de6d9b64
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714 }
715}
716
156e5023
NK
717unsigned avcodec_version( void )
718{
719 return LIBAVCODEC_VERSION_INT;
720}
cf087595 721
8bceb6af
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722unsigned avcodec_build( void )
723{
724 return LIBAVCODEC_BUILD;
725}
726
de6d9b64
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727/* must be called before any other functions */
728void avcodec_init(void)
729{
0344cd0a
AB
730 static int inited = 0;
731
732 if (inited != 0)
733 return;
734 inited = 1;
735
59cf08ce 736 dsputil_static_init();
de6d9b64
FB
737}
738
7a06ff14
MN
739/**
740 * Flush buffers, should be called when seeking or when swicthing to a different stream.
741 */
1c2a8c7f
MN
742void avcodec_flush_buffers(AVCodecContext *avctx)
743{
7a06ff14
MN
744 if(avctx->codec->flush)
745 avctx->codec->flush(avctx);
1c2a8c7f
MN
746}
747
d90cf87b
MN
748void avcodec_default_free_buffers(AVCodecContext *s){
749 int i, j;
750
751 if(s->internal_buffer==NULL) return;
752
753 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
754 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
755 for(j=0; j<4; j++){
756 av_freep(&buf->base[j]);
757 buf->data[j]= NULL;
758 }
759 }
760 av_freep(&s->internal_buffer);
761
762 s->internal_buffer_count=0;
763}
764
d8085ea7
MN
765char av_get_pict_type_char(int pict_type){
766 switch(pict_type){
767 case I_TYPE: return 'I';
768 case P_TYPE: return 'P';
769 case B_TYPE: return 'B';
770 case S_TYPE: return 'S';
771 case SI_TYPE:return 'i';
772 case SP_TYPE:return 'p';
773 default: return '?';
774 }
775}
776
14bea432
MN
777int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
778 int exact=1, sign=0;
5ed9f2e5 779 int64_t gcd;
14bea432
MN
780
781 assert(den != 0);
782
783 if(den < 0){
784 den= -den;
785 nom= -nom;
786 }
787
788 if(nom < 0){
789 nom= -nom;
790 sign= 1;
791 }
792
5ed9f2e5
MN
793 gcd = ff_gcd(nom, den);
794 nom /= gcd;
795 den /= gcd;
14bea432 796
5ed9f2e5
MN
797 if(nom > max || den > max){
798 AVRational a0={0,1}, a1={1,0};
799 exact=0;
800
801 for(;;){
802 int64_t x= nom / den;
803 int64_t a2n= x*a1.num + a0.num;
804 int64_t a2d= x*a1.den + a0.den;
805
806 if(a2n > max || a2d > max) break;
807
808 nom %= den;
809
810 a0= a1;
811 a1= (AVRational){a2n, a2d};
812 if(nom==0) break;
813 x= nom; nom=den; den=x;
814 }
815 nom= a1.num;
816 den= a1.den;
14bea432
MN
817 }
818
5ed9f2e5
MN
819 assert(ff_gcd(nom, den) == 1);
820
14bea432
MN
821 if(sign) nom= -nom;
822
823 *dst_nom = nom;
824 *dst_den = den;
825
826 return exact;
827}
828
829int64_t av_rescale(int64_t a, int b, int c){
830 uint64_t h, l;
831 assert(c > 0);
832 assert(b >=0);
833
834 if(a<0) return -av_rescale(-a, b, c);
835
836 h= a>>32;
837 if(h==0) return a*b/c;
838
839 l= a&0xFFFFFFFF;
840 l *= b;
841 h *= b;
842
843 l += (h%c)<<32;
844
845 return ((h/c)<<32) + l/c;
846}
9b879566
MB
847
848/* av_log API */
849
9b879566
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850static int av_log_level = AV_LOG_DEBUG;
851
bc874dae 852static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
9b879566 853{
89b9441a 854 static int print_prefix=1;
43465395 855 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
9b879566 856 if(level>av_log_level)
bc874dae 857 return;
d705e4a6 858#undef fprintf
43465395
MN
859 if(print_prefix && avc) {
860 fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
bc874dae 861 }
d705e4a6 862#define fprintf please_use_av_log
89b9441a 863
95ba2c8f 864 print_prefix= strstr(fmt, "\n") != NULL;
89b9441a 865
9b879566
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866 vfprintf(stderr, fmt, vl);
867}
868
bc874dae 869static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
9b879566 870
bc874dae 871void av_log(void* avcl, int level, const char *fmt, ...)
9b879566
MB
872{
873 va_list vl;
874 va_start(vl, fmt);
bc874dae 875 av_vlog(avcl, level, fmt, vl);
9b879566
MB
876 va_end(vl);
877}
878
bc874dae 879void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
9b879566 880{
bc874dae 881 av_log_callback(avcl, level, fmt, vl);
9b879566
MB
882}
883
884int av_log_get_level(void)
885{
886 return av_log_level;
887}
888
889void av_log_set_level(int level)
890{
891 av_log_level = level;
892}
893
bc874dae 894void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
9b879566
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895{
896 av_log_callback = callback;
897}
898