lowres fixes for the parser
[libav.git] / libavcodec / utils.c
CommitLineData
de6d9b64
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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"
4c263142 30#include "integer.h"
9b879566 31#include <stdarg.h>
4c263142 32#include <limits.h>
de6d9b64 33
b100eab8 34void avcodec_default_free_buffers(AVCodecContext *s);
eea8c08f 35
18f77016 36void *av_mallocz(unsigned int size)
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37{
38 void *ptr;
5b20b732 39
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40 ptr = av_malloc(size);
41 if (!ptr)
42 return NULL;
43 memset(ptr, 0, size);
44 return ptr;
45}
46
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47char *av_strdup(const char *s)
48{
49 char *ptr;
50 int len;
51 len = strlen(s) + 1;
52 ptr = av_malloc(len);
53 if (!ptr)
54 return NULL;
55 memcpy(ptr, s, len);
56 return ptr;
57}
58
59/**
60 * realloc which does nothing if the block is large enough
61 */
5c91a675 62void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
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63{
64 if(min_size < *size)
65 return ptr;
66
4e39ab4c 67 *size= 17*min_size/16 + 32;
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68
69 return av_realloc(ptr, *size);
70}
71
72
855ea723 73static unsigned int last_static = 0;
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74static unsigned int allocated_static = 0;
75static void** array_static = NULL;
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76
77/**
78 * allocation of static arrays - do not use for normal allocation.
79 */
80void *av_mallocz_static(unsigned int size)
855ea723 81{
855ea723 82 void *ptr = av_mallocz(size);
855ea723 83
8d1f2ba5 84 if(ptr){
4e39ab4c 85 array_static =av_fast_realloc(array_static, &allocated_static, sizeof(void*)*(last_static+1));
8d1f2ba5 86 array_static[last_static++] = ptr;
855ea723 87 }
8d1f2ba5 88
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89 return ptr;
90}
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91
92/**
93 * free all static arrays and reset pointers to 0.
94 */
4cfbf61b 95void av_free_static(void)
855ea723 96{
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97 while(last_static){
98 av_freep(&array_static[--last_static]);
855ea723 99 }
8d1f2ba5 100 av_freep(&array_static);
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101}
102
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103/**
104 * Frees memory and sets the pointer to NULL.
105 * @param arg pointer to the pointer which should be freed
106 */
107void av_freep(void *arg)
4d7a0a05 108{
81c5f887 109 void **ptr= (void**)arg;
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110 av_free(*ptr);
111 *ptr = NULL;
112}
113
de6d9b64 114/* encoder management */
8b69867f 115AVCodec *first_avcodec = NULL;
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116
117void register_avcodec(AVCodec *format)
118{
119 AVCodec **p;
120 p = &first_avcodec;
121 while (*p != NULL) p = &(*p)->next;
122 *p = format;
123 format->next = NULL;
124}
125
d90cf87b 126typedef struct InternalBuffer{
1e491e29 127 int last_pic_num;
d90cf87b 128 uint8_t *base[4];
1e491e29 129 uint8_t *data[4];
237e4938 130 int linesize[4];
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131}InternalBuffer;
132
133#define INTERNAL_BUFFER_SIZE 32
1e491e29 134
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135#define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
136
137void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
138 int w_align= 1;
139 int h_align= 1;
140
141 switch(s->pix_fmt){
142 case PIX_FMT_YUV420P:
143 case PIX_FMT_YUV422:
ebb177dd 144 case PIX_FMT_UYVY422:
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145 case PIX_FMT_YUV422P:
146 case PIX_FMT_YUV444P:
147 case PIX_FMT_GRAY8:
148 case PIX_FMT_YUVJ420P:
149 case PIX_FMT_YUVJ422P:
150 case PIX_FMT_YUVJ444P:
151 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
152 h_align= 16;
153 break;
154 case PIX_FMT_YUV411P:
155 w_align=32;
156 h_align=8;
157 break;
158 case PIX_FMT_YUV410P:
159 if(s->codec_id == CODEC_ID_SVQ1){
160 w_align=64;
161 h_align=64;
162 }
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163 case PIX_FMT_RGB555:
164 if(s->codec_id == CODEC_ID_RPZA){
165 w_align=4;
166 h_align=4;
167 }
168 case PIX_FMT_PAL8:
169 if(s->codec_id == CODEC_ID_SMC){
170 w_align=4;
171 h_align=4;
172 }
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173 break;
174 default:
175 w_align= 1;
176 h_align= 1;
177 break;
178 }
179
180 *width = ALIGN(*width , w_align);
181 *height= ALIGN(*height, h_align);
182}
183
492cd3a9 184int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 185 int i;
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186 int w= s->width;
187 int h= s->height;
d90cf87b 188 InternalBuffer *buf;
237e4938 189 int *picture_number;
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190
191 assert(pic->data[0]==NULL);
d90cf87b 192 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
1e491e29 193
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194 if(s->internal_buffer==NULL){
195 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
196 }
197#if 0
198 s->internal_buffer= av_fast_realloc(
199 s->internal_buffer,
200 &s->internal_buffer_size,
201 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
202 );
203#endif
204
205 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
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206 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
207 (*picture_number)++;
208
d90cf87b 209 if(buf->base[0]){
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210 pic->age= *picture_number - buf->last_pic_num;
211 buf->last_pic_num= *picture_number;
1e491e29 212 }else{
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213 int h_chroma_shift, v_chroma_shift;
214 int s_align, pixel_size;
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215
216 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
f0bbfc4a 217
1e491e29 218 switch(s->pix_fmt){
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219 case PIX_FMT_RGB555:
220 case PIX_FMT_RGB565:
1e491e29 221 case PIX_FMT_YUV422:
ebb177dd 222 case PIX_FMT_UYVY422:
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223 pixel_size=2;
224 break;
225 case PIX_FMT_RGB24:
226 case PIX_FMT_BGR24:
227 pixel_size=3;
228 break;
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229 case PIX_FMT_RGBA32:
230 pixel_size=4;
231 break;
232 default:
233 pixel_size=1;
234 }
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235
236 avcodec_align_dimensions(s, &w, &h);
237#if defined(ARCH_POWERPC) || defined(HAVE_MMI) //FIXME some cleaner check
238 s_align= 16;
239#else
240 s_align= 8;
241#endif
242
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243 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
244 w+= EDGE_WIDTH*2;
245 h+= EDGE_WIDTH*2;
246 }
247
d90cf87b 248 buf->last_pic_num= -256*256*256*64;
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249
250 for(i=0; i<3; i++){
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251 const int h_shift= i==0 ? 0 : h_chroma_shift;
252 const int v_shift= i==0 ? 0 : v_chroma_shift;
1e491e29 253
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254 //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
255 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, s_align<<(h_chroma_shift-h_shift));
1e491e29 256
237e4938 257 buf->base[i]= av_mallocz((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
d90cf87b 258 if(buf->base[i]==NULL) return -1;
237e4938 259 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
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260
261 if(s->flags&CODEC_FLAG_EMU_EDGE)
d90cf87b 262 buf->data[i] = buf->base[i];
1e491e29 263 else
237e4938 264 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), s_align);
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265 }
266 pic->age= 256*256*256*64;
267 }
237e4938 268 pic->type= FF_BUFFER_TYPE_INTERNAL;
1e491e29 269
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270 for(i=0; i<4; i++){
271 pic->base[i]= buf->base[i];
272 pic->data[i]= buf->data[i];
237e4938 273 pic->linesize[i]= buf->linesize[i];
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274 }
275 s->internal_buffer_count++;
276
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277 return 0;
278}
279
492cd3a9 280void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 281 int i;
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282 InternalBuffer *buf, *last, temp;
283
4e00e76b 284 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
59c673d5 285 assert(s->internal_buffer_count);
d90cf87b 286
b1609412 287 buf = NULL; /* avoids warning */
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288 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
289 buf= &((InternalBuffer*)s->internal_buffer)[i];
290 if(buf->data[0] == pic->data[0])
291 break;
292 }
293 assert(i < s->internal_buffer_count);
294 s->internal_buffer_count--;
295 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
296
297 temp= *buf;
298 *buf= *last;
299 *last= temp;
300
301 for(i=0; i<3; i++){
1e491e29 302 pic->data[i]=NULL;
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303// pic->base[i]=NULL;
304 }
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305//printf("R%X\n", pic->opaque);
306}
307
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RT
308int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
309 AVFrame temp_pic;
310 int i;
311
312 /* If no picture return a new buffer */
313 if(pic->data[0] == NULL) {
314 /* We will copy from buffer, so must be readable */
315 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
316 return s->get_buffer(s, pic);
317 }
318
319 /* If internal buffer type return the same buffer */
320 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
321 return 0;
322
323 /*
324 * Not internal type and reget_buffer not overridden, emulate cr buffer
325 */
326 temp_pic = *pic;
327 for(i = 0; i < 4; i++)
328 pic->data[i] = pic->base[i] = NULL;
329 pic->opaque = NULL;
330 /* Allocate new frame */
331 if (s->get_buffer(s, pic))
332 return -1;
333 /* Copy image data from old buffer to new buffer */
334 img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
335 s->height);
336 s->release_buffer(s, &temp_pic); // Release old frame
337 return 0;
338}
339
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340int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
341 int i;
342
343 for(i=0; i<count; i++){
344 int r= func(c, arg[i]);
345 if(ret) ret[i]= r;
346 }
347 return 0;
348}
349
494c56d3 350enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
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351 return fmt[0];
352}
353
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354static const char* context_to_name(void* ptr) {
355 AVCodecContext *avc= ptr;
356
357 if(avc && avc->codec && avc->codec->name)
358 return avc->codec->name;
359 else
360 return "NULL";
361}
362
363static AVClass av_codec_context_class = { "AVCodecContext", context_to_name };
364
a949d72e 365void avcodec_get_context_defaults(AVCodecContext *s){
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366 memset(s, 0, sizeof(AVCodecContext));
367
43465395 368 s->av_class= &av_codec_context_class;
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369 s->bit_rate= 800*1000;
370 s->bit_rate_tolerance= s->bit_rate*10;
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371 s->qmin= 2;
372 s->qmax= 31;
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373 s->mb_qmin= 2;
374 s->mb_qmax= 31;
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375 s->rc_eq= "tex^qComp";
376 s->qcompress= 0.5;
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377 s->max_qdiff= 3;
378 s->b_quant_factor=1.25;
379 s->b_quant_offset=1.25;
b3a391e8 380 s->i_quant_factor=-0.8;
e8b62df6 381 s->i_quant_offset=0.0;
4d2858de 382 s->error_concealment= 3;
8d0e42ca 383 s->error_resilience= 1;
4d2858de 384 s->workaround_bugs= FF_BUG_AUTODETECT;
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385 s->frame_rate_base= 1;
386 s->frame_rate = 25;
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387 s->gop_size= 50;
388 s->me_method= ME_EPZS;
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389 s->get_buffer= avcodec_default_get_buffer;
390 s->release_buffer= avcodec_default_release_buffer;
a33c7159 391 s->get_format= avcodec_default_get_format;
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392 s->execute= avcodec_default_execute;
393 s->thread_count=1;
826f429a 394 s->me_subpel_quality=8;
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395 s->lmin= FF_QP2LAMBDA * s->qmin;
396 s->lmax= FF_QP2LAMBDA * s->qmax;
5ff85f1d 397 s->sample_aspect_ratio= (AVRational){0,1};
620fe604 398 s->ildct_cmp= FF_CMP_VSAD;
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399 s->profile= FF_PROFILE_UNKNOWN;
400 s->level= FF_LEVEL_UNKNOWN;
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401
402 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
403 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
2a2bbcb0 404 s->palctrl = NULL;
e1c2a5a0 405 s->reget_buffer= avcodec_default_reget_buffer;
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406}
407
408/**
409 * allocates a AVCodecContext and set it to defaults.
410 * this can be deallocated by simply calling free()
411 */
7ffbb60e 412AVCodecContext *avcodec_alloc_context(void){
9740beff 413 AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
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414
415 if(avctx==NULL) return NULL;
416
417 avcodec_get_context_defaults(avctx);
418
419 return avctx;
420}
421
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422void avcodec_get_frame_defaults(AVFrame *pic){
423 memset(pic, 0, sizeof(AVFrame));
424
425 pic->pts= AV_NOPTS_VALUE;
426}
427
1e491e29 428/**
492cd3a9 429 * allocates a AVPFrame and set it to defaults.
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430 * this can be deallocated by simply calling free()
431 */
492cd3a9 432AVFrame *avcodec_alloc_frame(void){
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433 AVFrame *pic= av_malloc(sizeof(AVFrame));
434
435 if(pic==NULL) return NULL;
436
437 avcodec_get_frame_defaults(pic);
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438
439 return pic;
440}
441
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442int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
443{
444 int ret;
445
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446 if(avctx->codec)
447 return -1;
448
de6d9b64 449 avctx->codec = codec;
4cb3ca72 450 avctx->codec_id = codec->id;
de6d9b64 451 avctx->frame_number = 0;
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452 if (codec->priv_data_size > 0) {
453 avctx->priv_data = av_mallocz(codec->priv_data_size);
454 if (!avctx->priv_data)
455 return -ENOMEM;
456 } else {
457 avctx->priv_data = NULL;
458 }
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459 ret = avctx->codec->init(avctx);
460 if (ret < 0) {
3123dd79 461 av_freep(&avctx->priv_data);
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462 return ret;
463 }
464 return 0;
465}
466
0c1a9eda 467int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
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468 const short *samples)
469{
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470 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
471 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
472 avctx->frame_number++;
473 return ret;
474 }else
475 return 0;
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476}
477
0c1a9eda 478int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
492cd3a9 479 const AVFrame *pict)
de6d9b64 480{
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481 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
482 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
483 avctx->frame_number++;
484 emms_c(); //needed to avoid a emms_c() call before every return;
6bb925f4 485
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486 return ret;
487 }else
488 return 0;
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489}
490
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491/**
492 * decode a frame.
493 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
494 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
495 * @param buf_size the size of the buffer in bytes
496 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
497 * @return -1 if error, otherwise return the number of
498 * bytes used.
499 */
492cd3a9 500int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
de6d9b64 501 int *got_picture_ptr,
0c1a9eda 502 uint8_t *buf, int buf_size)
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503{
504 int ret;
1e491e29 505
53db1cae 506 *got_picture_ptr= 0;
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507 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
508 buf, buf_size);
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509
510 emms_c(); //needed to avoid a emms_c() call before every return;
1e491e29 511
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512 if (*got_picture_ptr)
513 avctx->frame_number++;
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514 return ret;
515}
516
517/* decode an audio frame. return -1 if error, otherwise return the
518 *number of bytes used. If no frame could be decompressed,
519 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
520 *size in BYTES. */
0c1a9eda 521int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
de6d9b64 522 int *frame_size_ptr,
0c1a9eda 523 uint8_t *buf, int buf_size)
de6d9b64
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524{
525 int ret;
526
53db1cae 527 *frame_size_ptr= 0;
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528 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
529 buf, buf_size);
530 avctx->frame_number++;
531 return ret;
532}
533
534int avcodec_close(AVCodecContext *avctx)
535{
536 if (avctx->codec->close)
537 avctx->codec->close(avctx);
eea8c08f 538 avcodec_default_free_buffers(avctx);
3123dd79 539 av_freep(&avctx->priv_data);
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540 avctx->codec = NULL;
541 return 0;
542}
543
544AVCodec *avcodec_find_encoder(enum CodecID id)
545{
546 AVCodec *p;
547 p = first_avcodec;
548 while (p) {
549 if (p->encode != NULL && p->id == id)
550 return p;
551 p = p->next;
552 }
553 return NULL;
554}
555
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A
556AVCodec *avcodec_find_encoder_by_name(const char *name)
557{
558 AVCodec *p;
559 p = first_avcodec;
560 while (p) {
561 if (p->encode != NULL && strcmp(name,p->name) == 0)
562 return p;
563 p = p->next;
564 }
565 return NULL;
566}
567
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568AVCodec *avcodec_find_decoder(enum CodecID id)
569{
570 AVCodec *p;
571 p = first_avcodec;
572 while (p) {
573 if (p->decode != NULL && p->id == id)
574 return p;
575 p = p->next;
576 }
577 return NULL;
578}
579
580AVCodec *avcodec_find_decoder_by_name(const char *name)
581{
582 AVCodec *p;
583 p = first_avcodec;
584 while (p) {
585 if (p->decode != NULL && strcmp(name,p->name) == 0)
586 return p;
587 p = p->next;
588 }
589 return NULL;
590}
591
50071f0b 592static AVCodec *avcodec_find(enum CodecID id)
de6d9b64
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593{
594 AVCodec *p;
595 p = first_avcodec;
596 while (p) {
597 if (p->id == id)
598 return p;
599 p = p->next;
600 }
601 return NULL;
602}
603
604void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
605{
606 const char *codec_name;
607 AVCodec *p;
608 char buf1[32];
623563c0 609 char channels_str[100];
a96b68b7 610 int bitrate;
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611
612 if (encode)
613 p = avcodec_find_encoder(enc->codec_id);
614 else
615 p = avcodec_find_decoder(enc->codec_id);
616
617 if (p) {
618 codec_name = p->name;
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619 if (!encode && enc->codec_id == CODEC_ID_MP3) {
620 if (enc->sub_id == 2)
621 codec_name = "mp2";
622 else if (enc->sub_id == 1)
623 codec_name = "mp1";
624 }
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625 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
626 /* fake mpeg2 transport stream codec (currently not
627 registered) */
628 codec_name = "mpeg2ts";
de6d9b64
FB
629 } else if (enc->codec_name[0] != '\0') {
630 codec_name = enc->codec_name;
631 } else {
632 /* output avi tags */
633 if (enc->codec_type == CODEC_TYPE_VIDEO) {
634 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
635 enc->codec_tag & 0xff,
636 (enc->codec_tag >> 8) & 0xff,
637 (enc->codec_tag >> 16) & 0xff,
638 (enc->codec_tag >> 24) & 0xff);
639 } else {
640 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
641 }
642 codec_name = buf1;
643 }
644
645 switch(enc->codec_type) {
646 case CODEC_TYPE_VIDEO:
647 snprintf(buf, buf_size,
648 "Video: %s%s",
7d1c3fc1 649 codec_name, enc->mb_decision ? " (hq)" : "");
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650 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
651 snprintf(buf + strlen(buf), buf_size - strlen(buf),
652 ", %s",
9bbffbb1 653 avcodec_get_pix_fmt_name(enc->pix_fmt));
cf087595 654 }
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655 if (enc->width) {
656 snprintf(buf + strlen(buf), buf_size - strlen(buf),
657 ", %dx%d, %0.2f fps",
658 enc->width, enc->height,
14bea432 659 (float)enc->frame_rate / enc->frame_rate_base);
de6d9b64 660 }
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661 if (encode) {
662 snprintf(buf + strlen(buf), buf_size - strlen(buf),
663 ", q=%d-%d", enc->qmin, enc->qmax);
664 }
a96b68b7 665 bitrate = enc->bit_rate;
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666 break;
667 case CODEC_TYPE_AUDIO:
668 snprintf(buf, buf_size,
669 "Audio: %s",
670 codec_name);
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671 switch (enc->channels) {
672 case 1:
623563c0 673 strcpy(channels_str, "mono");
e0d2714a
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674 break;
675 case 2:
623563c0 676 strcpy(channels_str, "stereo");
e0d2714a
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677 break;
678 case 6:
623563c0 679 strcpy(channels_str, "5:1");
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680 break;
681 default:
682 sprintf(channels_str, "%d channels", enc->channels);
683 break;
684 }
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685 if (enc->sample_rate) {
686 snprintf(buf + strlen(buf), buf_size - strlen(buf),
687 ", %d Hz, %s",
688 enc->sample_rate,
e0d2714a 689 channels_str);
de6d9b64 690 }
e0d2714a 691
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692 /* for PCM codecs, compute bitrate directly */
693 switch(enc->codec_id) {
694 case CODEC_ID_PCM_S16LE:
695 case CODEC_ID_PCM_S16BE:
696 case CODEC_ID_PCM_U16LE:
697 case CODEC_ID_PCM_U16BE:
a190b7e9 698 bitrate = enc->sample_rate * enc->channels * 16;
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699 break;
700 case CODEC_ID_PCM_S8:
701 case CODEC_ID_PCM_U8:
702 case CODEC_ID_PCM_ALAW:
703 case CODEC_ID_PCM_MULAW:
a190b7e9 704 bitrate = enc->sample_rate * enc->channels * 8;
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705 break;
706 default:
707 bitrate = enc->bit_rate;
708 break;
709 }
de6d9b64 710 break;
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711 case CODEC_TYPE_DATA:
712 snprintf(buf, buf_size, "Data: %s", codec_name);
713 bitrate = enc->bit_rate;
714 break;
de6d9b64 715 default:
b71472eb 716 av_abort();
de6d9b64 717 }
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FB
718 if (encode) {
719 if (enc->flags & CODEC_FLAG_PASS1)
720 snprintf(buf + strlen(buf), buf_size - strlen(buf),
721 ", pass 1");
722 if (enc->flags & CODEC_FLAG_PASS2)
723 snprintf(buf + strlen(buf), buf_size - strlen(buf),
724 ", pass 2");
725 }
a96b68b7 726 if (bitrate != 0) {
de6d9b64 727 snprintf(buf + strlen(buf), buf_size - strlen(buf),
a96b68b7 728 ", %d kb/s", bitrate / 1000);
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729 }
730}
731
156e5023
NK
732unsigned avcodec_version( void )
733{
734 return LIBAVCODEC_VERSION_INT;
735}
cf087595 736
8bceb6af
NK
737unsigned avcodec_build( void )
738{
739 return LIBAVCODEC_BUILD;
740}
741
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FB
742/* must be called before any other functions */
743void avcodec_init(void)
744{
0344cd0a
AB
745 static int inited = 0;
746
747 if (inited != 0)
748 return;
749 inited = 1;
750
59cf08ce 751 dsputil_static_init();
de6d9b64
FB
752}
753
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754/**
755 * Flush buffers, should be called when seeking or when swicthing to a different stream.
756 */
1c2a8c7f
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757void avcodec_flush_buffers(AVCodecContext *avctx)
758{
7a06ff14
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759 if(avctx->codec->flush)
760 avctx->codec->flush(avctx);
1c2a8c7f
MN
761}
762
b100eab8 763void avcodec_default_free_buffers(AVCodecContext *s){
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MN
764 int i, j;
765
766 if(s->internal_buffer==NULL) return;
767
768 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
769 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
770 for(j=0; j<4; j++){
771 av_freep(&buf->base[j]);
772 buf->data[j]= NULL;
773 }
774 }
775 av_freep(&s->internal_buffer);
776
777 s->internal_buffer_count=0;
778}
779
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780char av_get_pict_type_char(int pict_type){
781 switch(pict_type){
782 case I_TYPE: return 'I';
783 case P_TYPE: return 'P';
784 case B_TYPE: return 'B';
785 case S_TYPE: return 'S';
786 case SI_TYPE:return 'i';
787 case SP_TYPE:return 'p';
788 default: return '?';
789 }
790}
791
14bea432 792int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
5f63d108
MN
793 AVRational a0={0,1}, a1={1,0};
794 int sign= (nom<0) ^ (den<0);
795 int64_t gcd= ff_gcd(ABS(nom), ABS(den));
796
797 nom = ABS(nom)/gcd;
798 den = ABS(den)/gcd;
799 if(nom<=max && den<=max){
800 a1= (AVRational){nom, den};
801 den=0;
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MN
802 }
803
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MN
804 while(den){
805 int64_t x = nom / den;
806 int64_t next_den= nom - den*x;
807 int64_t a2n= x*a1.num + a0.num;
808 int64_t a2d= x*a1.den + a0.den;
809
810 if(a2n > max || a2d > max) break;
811
812 a0= a1;
813 a1= (AVRational){a2n, a2d};
814 nom= den;
815 den= next_den;
816 }
817 assert(ff_gcd(a1.num, a1.den) == 1);
5ed9f2e5 818
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819 *dst_nom = sign ? -a1.num : a1.num;
820 *dst_den = a1.den;
14bea432 821
5f63d108 822 return den==0;
14bea432
MN
823}
824
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825int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd){
826 AVInteger ai;
827 int64_t r=0;
14bea432
MN
828 assert(c > 0);
829 assert(b >=0);
1f018225 830 assert(rnd >=0 && rnd<=5 && rnd!=4);
14bea432 831
1f018225 832 if(a<0) return -av_rescale_rnd(-a, b, c, rnd ^ ((rnd>>1)&1));
14bea432 833
1f018225
MN
834 if(rnd==AV_ROUND_NEAR_INF) r= c/2;
835 else if(rnd&1) r= c-1;
836
4c263142
MN
837 if(b<=INT_MAX && c<=INT_MAX){
838 if(a<=INT_MAX)
1f018225 839 return (a * b + r)/c;
4c263142 840 else
1f018225 841 return a/c*b + (a%c*b + r)/c;
4c263142 842 }
14bea432 843
4c263142 844 ai= av_mul_i(av_int2i(a), av_int2i(b));
1f018225 845 ai= av_add_i(ai, av_int2i(r));
4c263142 846
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MN
847 return av_i2int(av_div_i(ai, av_int2i(c)));
848}
849
850int64_t av_rescale(int64_t a, int64_t b, int64_t c){
851 return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF);
14bea432 852}
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853
854/* av_log API */
855
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856static int av_log_level = AV_LOG_DEBUG;
857
bc874dae 858static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
9b879566 859{
89b9441a 860 static int print_prefix=1;
43465395 861 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
9b879566 862 if(level>av_log_level)
bc874dae 863 return;
d705e4a6 864#undef fprintf
43465395
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865 if(print_prefix && avc) {
866 fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
bc874dae 867 }
d705e4a6 868#define fprintf please_use_av_log
89b9441a 869
95ba2c8f 870 print_prefix= strstr(fmt, "\n") != NULL;
89b9441a 871
9b879566
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872 vfprintf(stderr, fmt, vl);
873}
874
bc874dae 875static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
9b879566 876
bc874dae 877void av_log(void* avcl, int level, const char *fmt, ...)
9b879566
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878{
879 va_list vl;
880 va_start(vl, fmt);
bc874dae 881 av_vlog(avcl, level, fmt, vl);
9b879566
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882 va_end(vl);
883}
884
bc874dae 885void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
9b879566 886{
bc874dae 887 av_log_callback(avcl, level, fmt, vl);
9b879566
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888}
889
890int av_log_get_level(void)
891{
892 return av_log_level;
893}
894
895void av_log_set_level(int level)
896{
897 av_log_level = level;
898}
899
bc874dae 900void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
9b879566
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901{
902 av_log_callback = callback;
903}
904
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905#if !defined(HAVE_PTHREADS) && !defined(HAVE_W32THREADS)
906int avcodec_thread_init(AVCodecContext *s, int thread_count){
907 return -1;
908}
909#endif