increase size of crop table
[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"
4c263142 30#include "integer.h"
9b879566 31#include <stdarg.h>
4c263142 32#include <limits.h>
de6d9b64 33
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34static void avcodec_default_free_buffers(AVCodecContext *s);
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
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114/* encoder management */
115AVCodec *first_avcodec;
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:
144 case PIX_FMT_YUV422P:
145 case PIX_FMT_YUV444P:
146 case PIX_FMT_GRAY8:
147 case PIX_FMT_YUVJ420P:
148 case PIX_FMT_YUVJ422P:
149 case PIX_FMT_YUVJ444P:
150 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
151 h_align= 16;
152 break;
153 case PIX_FMT_YUV411P:
154 w_align=32;
155 h_align=8;
156 break;
157 case PIX_FMT_YUV410P:
158 if(s->codec_id == CODEC_ID_SVQ1){
159 w_align=64;
160 h_align=64;
161 }
162 break;
163 default:
164 w_align= 1;
165 h_align= 1;
166 break;
167 }
168
169 *width = ALIGN(*width , w_align);
170 *height= ALIGN(*height, h_align);
171}
172
492cd3a9 173int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 174 int i;
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175 int w= s->width;
176 int h= s->height;
d90cf87b 177 InternalBuffer *buf;
237e4938 178 int *picture_number;
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179
180 assert(pic->data[0]==NULL);
d90cf87b 181 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
1e491e29 182
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183 if(s->internal_buffer==NULL){
184 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
185 }
186#if 0
187 s->internal_buffer= av_fast_realloc(
188 s->internal_buffer,
189 &s->internal_buffer_size,
190 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
191 );
192#endif
193
194 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
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195 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
196 (*picture_number)++;
197
d90cf87b 198 if(buf->base[0]){
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199 pic->age= *picture_number - buf->last_pic_num;
200 buf->last_pic_num= *picture_number;
1e491e29 201 }else{
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202 int h_chroma_shift, v_chroma_shift;
203 int s_align, pixel_size;
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204
205 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
f0bbfc4a 206
1e491e29 207 switch(s->pix_fmt){
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208 case PIX_FMT_RGB555:
209 case PIX_FMT_RGB565:
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210 case PIX_FMT_YUV422:
211 pixel_size=2;
212 break;
213 case PIX_FMT_RGB24:
214 case PIX_FMT_BGR24:
215 pixel_size=3;
216 break;
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217 case PIX_FMT_RGBA32:
218 pixel_size=4;
219 break;
220 default:
221 pixel_size=1;
222 }
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223
224 avcodec_align_dimensions(s, &w, &h);
225#if defined(ARCH_POWERPC) || defined(HAVE_MMI) //FIXME some cleaner check
226 s_align= 16;
227#else
228 s_align= 8;
229#endif
230
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231 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
232 w+= EDGE_WIDTH*2;
233 h+= EDGE_WIDTH*2;
234 }
235
d90cf87b 236 buf->last_pic_num= -256*256*256*64;
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237
238 for(i=0; i<3; i++){
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239 const int h_shift= i==0 ? 0 : h_chroma_shift;
240 const int v_shift= i==0 ? 0 : v_chroma_shift;
1e491e29 241
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242 //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
243 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, s_align<<(h_chroma_shift-h_shift));
1e491e29 244
237e4938 245 buf->base[i]= av_mallocz((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
d90cf87b 246 if(buf->base[i]==NULL) return -1;
237e4938 247 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
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248
249 if(s->flags&CODEC_FLAG_EMU_EDGE)
d90cf87b 250 buf->data[i] = buf->base[i];
1e491e29 251 else
237e4938 252 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), s_align);
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253 }
254 pic->age= 256*256*256*64;
255 }
237e4938 256 pic->type= FF_BUFFER_TYPE_INTERNAL;
1e491e29 257
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258 for(i=0; i<4; i++){
259 pic->base[i]= buf->base[i];
260 pic->data[i]= buf->data[i];
237e4938 261 pic->linesize[i]= buf->linesize[i];
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262 }
263 s->internal_buffer_count++;
264
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265 return 0;
266}
267
492cd3a9 268void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 269 int i;
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270 InternalBuffer *buf, *last, temp;
271
4e00e76b 272 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
59c673d5 273 assert(s->internal_buffer_count);
d90cf87b 274
b1609412 275 buf = NULL; /* avoids warning */
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276 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
277 buf= &((InternalBuffer*)s->internal_buffer)[i];
278 if(buf->data[0] == pic->data[0])
279 break;
280 }
281 assert(i < s->internal_buffer_count);
282 s->internal_buffer_count--;
283 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
284
285 temp= *buf;
286 *buf= *last;
287 *last= temp;
288
289 for(i=0; i<3; i++){
1e491e29 290 pic->data[i]=NULL;
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291// pic->base[i]=NULL;
292 }
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293//printf("R%X\n", pic->opaque);
294}
295
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296int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
297 AVFrame temp_pic;
298 int i;
299
300 /* If no picture return a new buffer */
301 if(pic->data[0] == NULL) {
302 /* We will copy from buffer, so must be readable */
303 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
304 return s->get_buffer(s, pic);
305 }
306
307 /* If internal buffer type return the same buffer */
308 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
309 return 0;
310
311 /*
312 * Not internal type and reget_buffer not overridden, emulate cr buffer
313 */
314 temp_pic = *pic;
315 for(i = 0; i < 4; i++)
316 pic->data[i] = pic->base[i] = NULL;
317 pic->opaque = NULL;
318 /* Allocate new frame */
319 if (s->get_buffer(s, pic))
320 return -1;
321 /* Copy image data from old buffer to new buffer */
322 img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
323 s->height);
324 s->release_buffer(s, &temp_pic); // Release old frame
325 return 0;
326}
327
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328int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
329 int i;
330
331 for(i=0; i<count; i++){
332 int r= func(c, arg[i]);
333 if(ret) ret[i]= r;
334 }
335 return 0;
336}
337
494c56d3 338enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
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339 return fmt[0];
340}
341
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342static const char* context_to_name(void* ptr) {
343 AVCodecContext *avc= ptr;
344
345 if(avc && avc->codec && avc->codec->name)
346 return avc->codec->name;
347 else
348 return "NULL";
349}
350
351static AVClass av_codec_context_class = { "AVCodecContext", context_to_name };
352
a949d72e 353void avcodec_get_context_defaults(AVCodecContext *s){
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354 memset(s, 0, sizeof(AVCodecContext));
355
43465395 356 s->av_class= &av_codec_context_class;
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357 s->bit_rate= 800*1000;
358 s->bit_rate_tolerance= s->bit_rate*10;
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359 s->qmin= 2;
360 s->qmax= 31;
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361 s->mb_qmin= 2;
362 s->mb_qmax= 31;
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363 s->rc_eq= "tex^qComp";
364 s->qcompress= 0.5;
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365 s->max_qdiff= 3;
366 s->b_quant_factor=1.25;
367 s->b_quant_offset=1.25;
b3a391e8 368 s->i_quant_factor=-0.8;
e8b62df6 369 s->i_quant_offset=0.0;
4d2858de 370 s->error_concealment= 3;
8d0e42ca 371 s->error_resilience= 1;
4d2858de 372 s->workaround_bugs= FF_BUG_AUTODETECT;
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373 s->frame_rate_base= 1;
374 s->frame_rate = 25;
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375 s->gop_size= 50;
376 s->me_method= ME_EPZS;
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377 s->get_buffer= avcodec_default_get_buffer;
378 s->release_buffer= avcodec_default_release_buffer;
a33c7159 379 s->get_format= avcodec_default_get_format;
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380 s->execute= avcodec_default_execute;
381 s->thread_count=1;
826f429a 382 s->me_subpel_quality=8;
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383 s->lmin= FF_QP2LAMBDA * s->qmin;
384 s->lmax= FF_QP2LAMBDA * s->qmax;
5ff85f1d 385 s->sample_aspect_ratio= (AVRational){0,1};
620fe604 386 s->ildct_cmp= FF_CMP_VSAD;
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387
388 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
389 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
2a2bbcb0 390 s->palctrl = NULL;
e1c2a5a0 391 s->reget_buffer= avcodec_default_reget_buffer;
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392}
393
394/**
395 * allocates a AVCodecContext and set it to defaults.
396 * this can be deallocated by simply calling free()
397 */
7ffbb60e 398AVCodecContext *avcodec_alloc_context(void){
9740beff 399 AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
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400
401 if(avctx==NULL) return NULL;
402
403 avcodec_get_context_defaults(avctx);
404
405 return avctx;
406}
407
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408void avcodec_get_frame_defaults(AVFrame *pic){
409 memset(pic, 0, sizeof(AVFrame));
410
411 pic->pts= AV_NOPTS_VALUE;
412}
413
1e491e29 414/**
492cd3a9 415 * allocates a AVPFrame and set it to defaults.
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416 * this can be deallocated by simply calling free()
417 */
492cd3a9 418AVFrame *avcodec_alloc_frame(void){
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419 AVFrame *pic= av_malloc(sizeof(AVFrame));
420
421 if(pic==NULL) return NULL;
422
423 avcodec_get_frame_defaults(pic);
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424
425 return pic;
426}
427
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428int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
429{
430 int ret;
431
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432 if(avctx->codec)
433 return -1;
434
de6d9b64 435 avctx->codec = codec;
4cb3ca72 436 avctx->codec_id = codec->id;
de6d9b64 437 avctx->frame_number = 0;
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438 if (codec->priv_data_size > 0) {
439 avctx->priv_data = av_mallocz(codec->priv_data_size);
440 if (!avctx->priv_data)
441 return -ENOMEM;
442 } else {
443 avctx->priv_data = NULL;
444 }
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445 ret = avctx->codec->init(avctx);
446 if (ret < 0) {
3123dd79 447 av_freep(&avctx->priv_data);
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448 return ret;
449 }
450 return 0;
451}
452
0c1a9eda 453int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
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454 const short *samples)
455{
456 int ret;
457
458 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
459 avctx->frame_number++;
460 return ret;
461}
462
0c1a9eda 463int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
492cd3a9 464 const AVFrame *pict)
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465{
466 int ret;
467
468 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
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469
470 emms_c(); //needed to avoid a emms_c() call before every return;
471
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472 avctx->frame_number++;
473 return ret;
474}
475
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476/**
477 * decode a frame.
478 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
479 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
480 * @param buf_size the size of the buffer in bytes
481 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
482 * @return -1 if error, otherwise return the number of
483 * bytes used.
484 */
492cd3a9 485int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
de6d9b64 486 int *got_picture_ptr,
0c1a9eda 487 uint8_t *buf, int buf_size)
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488{
489 int ret;
1e491e29 490
53db1cae 491 *got_picture_ptr= 0;
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492 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
493 buf, buf_size);
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494
495 emms_c(); //needed to avoid a emms_c() call before every return;
1e491e29 496
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497 if (*got_picture_ptr)
498 avctx->frame_number++;
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499 return ret;
500}
501
502/* decode an audio frame. return -1 if error, otherwise return the
503 *number of bytes used. If no frame could be decompressed,
504 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
505 *size in BYTES. */
0c1a9eda 506int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
de6d9b64 507 int *frame_size_ptr,
0c1a9eda 508 uint8_t *buf, int buf_size)
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509{
510 int ret;
511
53db1cae 512 *frame_size_ptr= 0;
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513 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
514 buf, buf_size);
515 avctx->frame_number++;
516 return ret;
517}
518
519int avcodec_close(AVCodecContext *avctx)
520{
521 if (avctx->codec->close)
522 avctx->codec->close(avctx);
eea8c08f 523 avcodec_default_free_buffers(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
50071f0b 577static AVCodec *avcodec_find(enum CodecID id)
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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)" : "");
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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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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 }
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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;
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651 break;
652 case CODEC_TYPE_AUDIO:
653 snprintf(buf, buf_size,
654 "Audio: %s",
655 codec_name);
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656 switch (enc->channels) {
657 case 1:
623563c0 658 strcpy(channels_str, "mono");
e0d2714a
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659 break;
660 case 2:
623563c0 661 strcpy(channels_str, "stereo");
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662 break;
663 case 6:
623563c0 664 strcpy(channels_str, "5:1");
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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;
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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;
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690 break;
691 default:
692 bitrate = enc->bit_rate;
693 break;
694 }
de6d9b64 695 break;
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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);
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714 }
715}
716
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717unsigned avcodec_version( void )
718{
719 return LIBAVCODEC_VERSION_INT;
720}
cf087595 721
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722unsigned avcodec_build( void )
723{
724 return LIBAVCODEC_BUILD;
725}
726
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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
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737}
738
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739/**
740 * Flush buffers, should be called when seeking or when swicthing to a different stream.
741 */
1c2a8c7f
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742void avcodec_flush_buffers(AVCodecContext *avctx)
743{
7a06ff14
MN
744 if(avctx->codec->flush)
745 avctx->codec->flush(avctx);
1c2a8c7f
MN
746}
747
eea8c08f 748static void avcodec_default_free_buffers(AVCodecContext *s){
d90cf87b
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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
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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
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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;
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780
781 assert(den != 0);
782
d01dbeb8
MN
783 if(den < 0)
784 return av_reduce(dst_nom, dst_den, -nom, -den, max);
14bea432 785
d01dbeb8
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786 sign= nom < 0;
787 nom= ABS(nom);
14bea432 788
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789 gcd = ff_gcd(nom, den);
790 nom /= gcd;
791 den /= gcd;
14bea432 792
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793 if(nom > max || den > max){
794 AVRational a0={0,1}, a1={1,0};
795 exact=0;
796
797 for(;;){
798 int64_t x= nom / den;
799 int64_t a2n= x*a1.num + a0.num;
800 int64_t a2d= x*a1.den + a0.den;
801
802 if(a2n > max || a2d > max) break;
803
804 nom %= den;
805
806 a0= a1;
807 a1= (AVRational){a2n, a2d};
808 if(nom==0) break;
809 x= nom; nom=den; den=x;
810 }
811 nom= a1.num;
812 den= a1.den;
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813 }
814
5ed9f2e5
MN
815 assert(ff_gcd(nom, den) == 1);
816
d01dbeb8 817 *dst_nom = sign ? -nom : nom;
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818 *dst_den = den;
819
820 return exact;
821}
822
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823int64_t av_rescale(int64_t a, int64_t b, int64_t c){
824 AVInteger ai, ci;
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825 assert(c > 0);
826 assert(b >=0);
827
828 if(a<0) return -av_rescale(-a, b, c);
829
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MN
830 if(b<=INT_MAX && c<=INT_MAX){
831 if(a<=INT_MAX)
832 return (a * b + c/2)/c;
833 else
834 return a/c*b + (a%c*b + c/2)/c;
835 }
14bea432 836
4c263142
MN
837 ai= av_mul_i(av_int2i(a), av_int2i(b));
838 ci= av_int2i(c);
839 ai= av_add_i(ai, av_shr_i(ci,1));
840
841 return av_i2int(av_div_i(ai, ci));
14bea432 842}
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843
844/* av_log API */
845
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846static int av_log_level = AV_LOG_DEBUG;
847
bc874dae 848static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
9b879566 849{
89b9441a 850 static int print_prefix=1;
43465395 851 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
9b879566 852 if(level>av_log_level)
bc874dae 853 return;
d705e4a6 854#undef fprintf
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855 if(print_prefix && avc) {
856 fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
bc874dae 857 }
d705e4a6 858#define fprintf please_use_av_log
89b9441a 859
95ba2c8f 860 print_prefix= strstr(fmt, "\n") != NULL;
89b9441a 861
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862 vfprintf(stderr, fmt, vl);
863}
864
bc874dae 865static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
9b879566 866
bc874dae 867void av_log(void* avcl, int level, const char *fmt, ...)
9b879566
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868{
869 va_list vl;
870 va_start(vl, fmt);
bc874dae 871 av_vlog(avcl, level, fmt, vl);
9b879566
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872 va_end(vl);
873}
874
bc874dae 875void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
9b879566 876{
bc874dae 877 av_log_callback(avcl, level, fmt, vl);
9b879566
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878}
879
880int av_log_get_level(void)
881{
882 return av_log_level;
883}
884
885void av_log_set_level(int level)
886{
887 av_log_level = level;
888}
889
bc874dae 890void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
9b879566
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891{
892 av_log_callback = callback;
893}
894
ca8ad847
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895#if !defined(HAVE_PTHREADS) && !defined(HAVE_W32THREADS)
896int avcodec_thread_init(AVCodecContext *s, int thread_count){
897 return -1;
898}
899#endif