ppc chroma mess workaround (real bug is that the motion compensation code assumes...
[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"
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
855ea723
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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/* cannot call it directly because of 'void **' casting is not automatic */
107void __av_freep(void **ptr)
108{
109 av_free(*ptr);
110 *ptr = NULL;
111}
112
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113/* encoder management */
114AVCodec *first_avcodec;
115
116void register_avcodec(AVCodec *format)
117{
118 AVCodec **p;
119 p = &first_avcodec;
120 while (*p != NULL) p = &(*p)->next;
121 *p = format;
122 format->next = NULL;
123}
124
d90cf87b 125typedef struct InternalBuffer{
1e491e29 126 int last_pic_num;
d90cf87b 127 uint8_t *base[4];
1e491e29 128 uint8_t *data[4];
237e4938 129 int linesize[4];
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130}InternalBuffer;
131
132#define INTERNAL_BUFFER_SIZE 32
1e491e29 133
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134#define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
135
136void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
137 int w_align= 1;
138 int h_align= 1;
139
140 switch(s->pix_fmt){
141 case PIX_FMT_YUV420P:
142 case PIX_FMT_YUV422:
143 case PIX_FMT_YUV422P:
144 case PIX_FMT_YUV444P:
145 case PIX_FMT_GRAY8:
146 case PIX_FMT_YUVJ420P:
147 case PIX_FMT_YUVJ422P:
148 case PIX_FMT_YUVJ444P:
149 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
150 h_align= 16;
151 break;
152 case PIX_FMT_YUV411P:
153 w_align=32;
154 h_align=8;
155 break;
156 case PIX_FMT_YUV410P:
157 if(s->codec_id == CODEC_ID_SVQ1){
158 w_align=64;
159 h_align=64;
160 }
161 break;
162 default:
163 w_align= 1;
164 h_align= 1;
165 break;
166 }
167
168 *width = ALIGN(*width , w_align);
169 *height= ALIGN(*height, h_align);
170}
171
492cd3a9 172int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 173 int i;
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174 int w= s->width;
175 int h= s->height;
d90cf87b 176 InternalBuffer *buf;
237e4938 177 int *picture_number;
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178
179 assert(pic->data[0]==NULL);
d90cf87b 180 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
1e491e29 181
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182 if(s->internal_buffer==NULL){
183 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
184 }
185#if 0
186 s->internal_buffer= av_fast_realloc(
187 s->internal_buffer,
188 &s->internal_buffer_size,
189 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
190 );
191#endif
192
193 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
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194 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
195 (*picture_number)++;
196
d90cf87b 197 if(buf->base[0]){
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198 pic->age= *picture_number - buf->last_pic_num;
199 buf->last_pic_num= *picture_number;
1e491e29 200 }else{
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201 int h_chroma_shift, v_chroma_shift;
202 int s_align, pixel_size;
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203
204 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
f0bbfc4a 205
1e491e29 206 switch(s->pix_fmt){
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207 case PIX_FMT_RGB555:
208 case PIX_FMT_RGB565:
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209 case PIX_FMT_YUV422:
210 pixel_size=2;
211 break;
212 case PIX_FMT_RGB24:
213 case PIX_FMT_BGR24:
214 pixel_size=3;
215 break;
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216 case PIX_FMT_RGBA32:
217 pixel_size=4;
218 break;
219 default:
220 pixel_size=1;
221 }
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222
223 avcodec_align_dimensions(s, &w, &h);
224#if defined(ARCH_POWERPC) || defined(HAVE_MMI) //FIXME some cleaner check
225 s_align= 16;
226#else
227 s_align= 8;
228#endif
229
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230 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
231 w+= EDGE_WIDTH*2;
232 h+= EDGE_WIDTH*2;
233 }
234
d90cf87b 235 buf->last_pic_num= -256*256*256*64;
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236
237 for(i=0; i<3; i++){
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238 const int h_shift= i==0 ? 0 : h_chroma_shift;
239 const int v_shift= i==0 ? 0 : v_chroma_shift;
1e491e29 240
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241 //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
242 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, s_align<<(h_chroma_shift-h_shift));
1e491e29 243
237e4938 244 buf->base[i]= av_mallocz((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
d90cf87b 245 if(buf->base[i]==NULL) return -1;
237e4938 246 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
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247
248 if(s->flags&CODEC_FLAG_EMU_EDGE)
d90cf87b 249 buf->data[i] = buf->base[i];
1e491e29 250 else
237e4938 251 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), s_align);
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252 }
253 pic->age= 256*256*256*64;
254 }
237e4938 255 pic->type= FF_BUFFER_TYPE_INTERNAL;
1e491e29 256
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257 for(i=0; i<4; i++){
258 pic->base[i]= buf->base[i];
259 pic->data[i]= buf->data[i];
237e4938 260 pic->linesize[i]= buf->linesize[i];
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261 }
262 s->internal_buffer_count++;
263
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264 return 0;
265}
266
492cd3a9 267void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 268 int i;
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269 InternalBuffer *buf, *last, temp;
270
4e00e76b 271 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
59c673d5 272 assert(s->internal_buffer_count);
d90cf87b 273
b1609412 274 buf = NULL; /* avoids warning */
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275 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
276 buf= &((InternalBuffer*)s->internal_buffer)[i];
277 if(buf->data[0] == pic->data[0])
278 break;
279 }
280 assert(i < s->internal_buffer_count);
281 s->internal_buffer_count--;
282 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
283
284 temp= *buf;
285 *buf= *last;
286 *last= temp;
287
288 for(i=0; i<3; i++){
1e491e29 289 pic->data[i]=NULL;
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290// pic->base[i]=NULL;
291 }
1e491e29
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292//printf("R%X\n", pic->opaque);
293}
294
e1c2a5a0
RT
295int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
296 AVFrame temp_pic;
297 int i;
298
299 /* If no picture return a new buffer */
300 if(pic->data[0] == NULL) {
301 /* We will copy from buffer, so must be readable */
302 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
303 return s->get_buffer(s, pic);
304 }
305
306 /* If internal buffer type return the same buffer */
307 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
308 return 0;
309
310 /*
311 * Not internal type and reget_buffer not overridden, emulate cr buffer
312 */
313 temp_pic = *pic;
314 for(i = 0; i < 4; i++)
315 pic->data[i] = pic->base[i] = NULL;
316 pic->opaque = NULL;
317 /* Allocate new frame */
318 if (s->get_buffer(s, pic))
319 return -1;
320 /* Copy image data from old buffer to new buffer */
321 img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
322 s->height);
323 s->release_buffer(s, &temp_pic); // Release old frame
324 return 0;
325}
326
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327enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, enum PixelFormat * fmt){
328 return fmt[0];
329}
330
a949d72e 331void avcodec_get_context_defaults(AVCodecContext *s){
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332 s->bit_rate= 800*1000;
333 s->bit_rate_tolerance= s->bit_rate*10;
a949d72e
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334 s->qmin= 2;
335 s->qmax= 31;
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336 s->mb_qmin= 2;
337 s->mb_qmax= 31;
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338 s->rc_eq= "tex^qComp";
339 s->qcompress= 0.5;
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340 s->max_qdiff= 3;
341 s->b_quant_factor=1.25;
342 s->b_quant_offset=1.25;
b3a391e8 343 s->i_quant_factor=-0.8;
e8b62df6 344 s->i_quant_offset=0.0;
4d2858de 345 s->error_concealment= 3;
8d0e42ca 346 s->error_resilience= 1;
4d2858de 347 s->workaround_bugs= FF_BUG_AUTODETECT;
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348 s->frame_rate_base= 1;
349 s->frame_rate = 25;
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350 s->gop_size= 50;
351 s->me_method= ME_EPZS;
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352 s->get_buffer= avcodec_default_get_buffer;
353 s->release_buffer= avcodec_default_release_buffer;
a33c7159 354 s->get_format= avcodec_default_get_format;
826f429a 355 s->me_subpel_quality=8;
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356 s->lmin= FF_QP2LAMBDA * s->qmin;
357 s->lmax= FF_QP2LAMBDA * s->qmax;
5ff85f1d 358 s->sample_aspect_ratio= (AVRational){0,1};
620fe604 359 s->ildct_cmp= FF_CMP_VSAD;
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360
361 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
362 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
2a2bbcb0 363 s->palctrl = NULL;
e1c2a5a0 364 s->reget_buffer= avcodec_default_reget_buffer;
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365}
366
367/**
368 * allocates a AVCodecContext and set it to defaults.
369 * this can be deallocated by simply calling free()
370 */
7ffbb60e 371AVCodecContext *avcodec_alloc_context(void){
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372 AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
373
374 if(avctx==NULL) return NULL;
375
376 avcodec_get_context_defaults(avctx);
377
378 return avctx;
379}
380
1e491e29 381/**
492cd3a9 382 * allocates a AVPFrame and set it to defaults.
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383 * this can be deallocated by simply calling free()
384 */
492cd3a9
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385AVFrame *avcodec_alloc_frame(void){
386 AVFrame *pic= av_mallocz(sizeof(AVFrame));
1e491e29
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387
388 return pic;
389}
390
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391int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
392{
393 int ret;
394
09770af8
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395 if(avctx->codec)
396 return -1;
397
de6d9b64 398 avctx->codec = codec;
4cb3ca72 399 avctx->codec_id = codec->id;
de6d9b64 400 avctx->frame_number = 0;
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PG
401 if (codec->priv_data_size > 0) {
402 avctx->priv_data = av_mallocz(codec->priv_data_size);
403 if (!avctx->priv_data)
404 return -ENOMEM;
405 } else {
406 avctx->priv_data = NULL;
407 }
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408 ret = avctx->codec->init(avctx);
409 if (ret < 0) {
3123dd79 410 av_freep(&avctx->priv_data);
de6d9b64
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411 return ret;
412 }
413 return 0;
414}
415
0c1a9eda 416int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
de6d9b64
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417 const short *samples)
418{
419 int ret;
420
421 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
422 avctx->frame_number++;
423 return ret;
424}
425
0c1a9eda 426int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
492cd3a9 427 const AVFrame *pict)
de6d9b64
FB
428{
429 int ret;
430
431 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
6bb925f4
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432
433 emms_c(); //needed to avoid a emms_c() call before every return;
434
de6d9b64
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435 avctx->frame_number++;
436 return ret;
437}
438
f138f883
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439/**
440 * decode a frame.
441 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
442 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
443 * @param buf_size the size of the buffer in bytes
444 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
445 * @return -1 if error, otherwise return the number of
446 * bytes used.
447 */
492cd3a9 448int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
de6d9b64 449 int *got_picture_ptr,
0c1a9eda 450 uint8_t *buf, int buf_size)
de6d9b64
FB
451{
452 int ret;
1e491e29 453
de6d9b64
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454 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
455 buf, buf_size);
6bb925f4
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456
457 emms_c(); //needed to avoid a emms_c() call before every return;
1e491e29 458
1cb0edb4
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459 if (*got_picture_ptr)
460 avctx->frame_number++;
de6d9b64
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461 return ret;
462}
463
464/* decode an audio frame. return -1 if error, otherwise return the
465 *number of bytes used. If no frame could be decompressed,
466 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
467 *size in BYTES. */
0c1a9eda 468int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
de6d9b64 469 int *frame_size_ptr,
0c1a9eda 470 uint8_t *buf, int buf_size)
de6d9b64
FB
471{
472 int ret;
473
474 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
475 buf, buf_size);
476 avctx->frame_number++;
477 return ret;
478}
479
480int avcodec_close(AVCodecContext *avctx)
481{
482 if (avctx->codec->close)
483 avctx->codec->close(avctx);
3123dd79 484 av_freep(&avctx->priv_data);
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485 avctx->codec = NULL;
486 return 0;
487}
488
489AVCodec *avcodec_find_encoder(enum CodecID id)
490{
491 AVCodec *p;
492 p = first_avcodec;
493 while (p) {
494 if (p->encode != NULL && p->id == id)
495 return p;
496 p = p->next;
497 }
498 return NULL;
499}
500
98f3b098
A
501AVCodec *avcodec_find_encoder_by_name(const char *name)
502{
503 AVCodec *p;
504 p = first_avcodec;
505 while (p) {
506 if (p->encode != NULL && strcmp(name,p->name) == 0)
507 return p;
508 p = p->next;
509 }
510 return NULL;
511}
512
de6d9b64
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513AVCodec *avcodec_find_decoder(enum CodecID id)
514{
515 AVCodec *p;
516 p = first_avcodec;
517 while (p) {
518 if (p->decode != NULL && p->id == id)
519 return p;
520 p = p->next;
521 }
522 return NULL;
523}
524
525AVCodec *avcodec_find_decoder_by_name(const char *name)
526{
527 AVCodec *p;
528 p = first_avcodec;
529 while (p) {
530 if (p->decode != NULL && strcmp(name,p->name) == 0)
531 return p;
532 p = p->next;
533 }
534 return NULL;
535}
536
537AVCodec *avcodec_find(enum CodecID id)
538{
539 AVCodec *p;
540 p = first_avcodec;
541 while (p) {
542 if (p->id == id)
543 return p;
544 p = p->next;
545 }
546 return NULL;
547}
548
549void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
550{
551 const char *codec_name;
552 AVCodec *p;
553 char buf1[32];
623563c0 554 char channels_str[100];
a96b68b7 555 int bitrate;
de6d9b64
FB
556
557 if (encode)
558 p = avcodec_find_encoder(enc->codec_id);
559 else
560 p = avcodec_find_decoder(enc->codec_id);
561
562 if (p) {
563 codec_name = p->name;
98ce5991
FB
564 if (!encode && enc->codec_id == CODEC_ID_MP3) {
565 if (enc->sub_id == 2)
566 codec_name = "mp2";
567 else if (enc->sub_id == 1)
568 codec_name = "mp1";
569 }
985180a1
FB
570 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
571 /* fake mpeg2 transport stream codec (currently not
572 registered) */
573 codec_name = "mpeg2ts";
de6d9b64
FB
574 } else if (enc->codec_name[0] != '\0') {
575 codec_name = enc->codec_name;
576 } else {
577 /* output avi tags */
578 if (enc->codec_type == CODEC_TYPE_VIDEO) {
579 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
580 enc->codec_tag & 0xff,
581 (enc->codec_tag >> 8) & 0xff,
582 (enc->codec_tag >> 16) & 0xff,
583 (enc->codec_tag >> 24) & 0xff);
584 } else {
585 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
586 }
587 codec_name = buf1;
588 }
589
590 switch(enc->codec_type) {
591 case CODEC_TYPE_VIDEO:
592 snprintf(buf, buf_size,
593 "Video: %s%s",
7d1c3fc1 594 codec_name, enc->mb_decision ? " (hq)" : "");
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FB
595 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
596 snprintf(buf + strlen(buf), buf_size - strlen(buf),
597 ", %s",
9bbffbb1 598 avcodec_get_pix_fmt_name(enc->pix_fmt));
cf087595 599 }
de6d9b64
FB
600 if (enc->width) {
601 snprintf(buf + strlen(buf), buf_size - strlen(buf),
602 ", %dx%d, %0.2f fps",
603 enc->width, enc->height,
14bea432 604 (float)enc->frame_rate / enc->frame_rate_base);
de6d9b64 605 }
4bfad535
FB
606 if (encode) {
607 snprintf(buf + strlen(buf), buf_size - strlen(buf),
608 ", q=%d-%d", enc->qmin, enc->qmax);
609 }
a96b68b7 610 bitrate = enc->bit_rate;
de6d9b64
FB
611 break;
612 case CODEC_TYPE_AUDIO:
613 snprintf(buf, buf_size,
614 "Audio: %s",
615 codec_name);
e0d2714a
J
616 switch (enc->channels) {
617 case 1:
623563c0 618 strcpy(channels_str, "mono");
e0d2714a
J
619 break;
620 case 2:
623563c0 621 strcpy(channels_str, "stereo");
e0d2714a
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622 break;
623 case 6:
623563c0 624 strcpy(channels_str, "5:1");
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625 break;
626 default:
627 sprintf(channels_str, "%d channels", enc->channels);
628 break;
629 }
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630 if (enc->sample_rate) {
631 snprintf(buf + strlen(buf), buf_size - strlen(buf),
632 ", %d Hz, %s",
633 enc->sample_rate,
e0d2714a 634 channels_str);
de6d9b64 635 }
e0d2714a 636
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637 /* for PCM codecs, compute bitrate directly */
638 switch(enc->codec_id) {
639 case CODEC_ID_PCM_S16LE:
640 case CODEC_ID_PCM_S16BE:
641 case CODEC_ID_PCM_U16LE:
642 case CODEC_ID_PCM_U16BE:
a190b7e9 643 bitrate = enc->sample_rate * enc->channels * 16;
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644 break;
645 case CODEC_ID_PCM_S8:
646 case CODEC_ID_PCM_U8:
647 case CODEC_ID_PCM_ALAW:
648 case CODEC_ID_PCM_MULAW:
a190b7e9 649 bitrate = enc->sample_rate * enc->channels * 8;
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650 break;
651 default:
652 bitrate = enc->bit_rate;
653 break;
654 }
de6d9b64 655 break;
985180a1
FB
656 case CODEC_TYPE_DATA:
657 snprintf(buf, buf_size, "Data: %s", codec_name);
658 bitrate = enc->bit_rate;
659 break;
de6d9b64 660 default:
b71472eb 661 av_abort();
de6d9b64 662 }
4bfad535
FB
663 if (encode) {
664 if (enc->flags & CODEC_FLAG_PASS1)
665 snprintf(buf + strlen(buf), buf_size - strlen(buf),
666 ", pass 1");
667 if (enc->flags & CODEC_FLAG_PASS2)
668 snprintf(buf + strlen(buf), buf_size - strlen(buf),
669 ", pass 2");
670 }
a96b68b7 671 if (bitrate != 0) {
de6d9b64 672 snprintf(buf + strlen(buf), buf_size - strlen(buf),
a96b68b7 673 ", %d kb/s", bitrate / 1000);
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674 }
675}
676
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677unsigned avcodec_version( void )
678{
679 return LIBAVCODEC_VERSION_INT;
680}
cf087595 681
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682unsigned avcodec_build( void )
683{
684 return LIBAVCODEC_BUILD;
685}
686
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687/* must be called before any other functions */
688void avcodec_init(void)
689{
0344cd0a
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690 static int inited = 0;
691
692 if (inited != 0)
693 return;
694 inited = 1;
695
59cf08ce 696 dsputil_static_init();
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697}
698
7a06ff14
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699/**
700 * Flush buffers, should be called when seeking or when swicthing to a different stream.
701 */
1c2a8c7f
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702void avcodec_flush_buffers(AVCodecContext *avctx)
703{
7a06ff14
MN
704 if(avctx->codec->flush)
705 avctx->codec->flush(avctx);
1c2a8c7f
MN
706}
707
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708void avcodec_default_free_buffers(AVCodecContext *s){
709 int i, j;
710
711 if(s->internal_buffer==NULL) return;
712
713 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
714 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
715 for(j=0; j<4; j++){
716 av_freep(&buf->base[j]);
717 buf->data[j]= NULL;
718 }
719 }
720 av_freep(&s->internal_buffer);
721
722 s->internal_buffer_count=0;
723}
724
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725char av_get_pict_type_char(int pict_type){
726 switch(pict_type){
727 case I_TYPE: return 'I';
728 case P_TYPE: return 'P';
729 case B_TYPE: return 'B';
730 case S_TYPE: return 'S';
731 case SI_TYPE:return 'i';
732 case SP_TYPE:return 'p';
733 default: return '?';
734 }
735}
736
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737int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
738 int exact=1, sign=0;
5ed9f2e5 739 int64_t gcd;
14bea432
MN
740
741 assert(den != 0);
742
743 if(den < 0){
744 den= -den;
745 nom= -nom;
746 }
747
748 if(nom < 0){
749 nom= -nom;
750 sign= 1;
751 }
752
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MN
753 gcd = ff_gcd(nom, den);
754 nom /= gcd;
755 den /= gcd;
14bea432 756
5ed9f2e5
MN
757 if(nom > max || den > max){
758 AVRational a0={0,1}, a1={1,0};
759 exact=0;
760
761 for(;;){
762 int64_t x= nom / den;
763 int64_t a2n= x*a1.num + a0.num;
764 int64_t a2d= x*a1.den + a0.den;
765
766 if(a2n > max || a2d > max) break;
767
768 nom %= den;
769
770 a0= a1;
771 a1= (AVRational){a2n, a2d};
772 if(nom==0) break;
773 x= nom; nom=den; den=x;
774 }
775 nom= a1.num;
776 den= a1.den;
14bea432
MN
777 }
778
5ed9f2e5
MN
779 assert(ff_gcd(nom, den) == 1);
780
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MN
781 if(sign) nom= -nom;
782
783 *dst_nom = nom;
784 *dst_den = den;
785
786 return exact;
787}
788
789int64_t av_rescale(int64_t a, int b, int c){
790 uint64_t h, l;
791 assert(c > 0);
792 assert(b >=0);
793
794 if(a<0) return -av_rescale(-a, b, c);
795
796 h= a>>32;
797 if(h==0) return a*b/c;
798
799 l= a&0xFFFFFFFF;
800 l *= b;
801 h *= b;
802
803 l += (h%c)<<32;
804
805 return ((h/c)<<32) + l/c;
806}
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807
808/* av_log API */
809
810#ifdef AV_LOG_TRAP_PRINTF
811#undef stderr
812#undef fprintf
813#endif
814
815static int av_log_level = AV_LOG_DEBUG;
816
817static void av_log_default_callback(AVCodecContext* avctx, int level, const char* fmt, va_list vl)
818{
89b9441a
MN
819 static int print_prefix=1;
820
9b879566
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821 if(level>av_log_level)
822 return;
89b9441a 823 if(avctx && print_prefix)
83f8c0c3 824 fprintf(stderr, "[%s @ %p]", avctx->codec ? avctx->codec->name : "?", avctx);
89b9441a 825
95ba2c8f 826 print_prefix= strstr(fmt, "\n") != NULL;
89b9441a 827
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828 vfprintf(stderr, fmt, vl);
829}
830
831static void (*av_log_callback)(AVCodecContext*, int, const char*, va_list) = av_log_default_callback;
832
833void av_log(AVCodecContext* avctx, int level, const char *fmt, ...)
834{
835 va_list vl;
836 va_start(vl, fmt);
837 av_vlog(avctx, level, fmt, vl);
838 va_end(vl);
839}
840
841void av_vlog(AVCodecContext* avctx, int level, const char *fmt, va_list vl)
842{
843 av_log_callback(avctx, level, fmt, vl);
844}
845
846int av_log_get_level(void)
847{
848 return av_log_level;
849}
850
851void av_log_set_level(int level)
852{
853 av_log_level = level;
854}
855
856void av_log_set_callback(void (*callback)(AVCodecContext*, int, const char*, va_list))
857{
858 av_log_callback = callback;
859}
860