segfault fix
[libav.git] / libavcodec / utils.c
CommitLineData
de6d9b64
FB
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 *
ff4ec49e
FB
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
ff4ec49e
FB
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
de6d9b64 16 *
ff4ec49e
FB
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 */
983e3246
MN
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
44608ac7
RG
34const uint8_t ff_reverse[256]={
350x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
360x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
370x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
380x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
390x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
400x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
410x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
420x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
430x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
440x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
450x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
460x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
470x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
480x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
490x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
500x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
51};
52
ddebfb15
MN
53static int volatile entangled_thread_counter=0;
54
b100eab8 55void avcodec_default_free_buffers(AVCodecContext *s);
eea8c08f 56
18f77016 57void *av_mallocz(unsigned int size)
3123dd79
FB
58{
59 void *ptr;
5b20b732 60
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61 ptr = av_malloc(size);
62 if (!ptr)
63 return NULL;
64 memset(ptr, 0, size);
65 return ptr;
66}
67
8e1e6f31
FB
68char *av_strdup(const char *s)
69{
70 char *ptr;
71 int len;
72 len = strlen(s) + 1;
73 ptr = av_malloc(len);
74 if (!ptr)
75 return NULL;
76 memcpy(ptr, s, len);
77 return ptr;
78}
79
80/**
81 * realloc which does nothing if the block is large enough
82 */
5c91a675 83void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
8e1e6f31
FB
84{
85 if(min_size < *size)
86 return ptr;
87
0ecca7a4 88 *size= FFMAX(17*min_size/16 + 32, min_size);
8e1e6f31
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89
90 return av_realloc(ptr, *size);
91}
92
93
855ea723 94static unsigned int last_static = 0;
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95static unsigned int allocated_static = 0;
96static void** array_static = NULL;
8d1f2ba5
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97
98/**
99 * allocation of static arrays - do not use for normal allocation.
100 */
101void *av_mallocz_static(unsigned int size)
855ea723 102{
855ea723 103 void *ptr = av_mallocz(size);
855ea723 104
8d1f2ba5 105 if(ptr){
4e39ab4c 106 array_static =av_fast_realloc(array_static, &allocated_static, sizeof(void*)*(last_static+1));
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107 if(!array_static)
108 return NULL;
8d1f2ba5 109 array_static[last_static++] = ptr;
855ea723 110 }
8d1f2ba5 111
855ea723
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112 return ptr;
113}
8d1f2ba5
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114
115/**
073c2593
BP
116 * same as above, but does realloc
117 */
118
119void *av_realloc_static(void *ptr, unsigned int size)
120{
121 int i;
122 if(!ptr)
123 return av_mallocz_static(size);
124 /* Look for the old ptr */
125 for(i = 0; i < last_static; i++) {
126 if(array_static[i] == ptr) {
127 array_static[i] = av_realloc(array_static[i], size);
128 return array_static[i];
129 }
130 }
131 return NULL;
132
133}
134
135/**
8d1f2ba5
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136 * free all static arrays and reset pointers to 0.
137 */
4cfbf61b 138void av_free_static(void)
855ea723 139{
8d1f2ba5
MN
140 while(last_static){
141 av_freep(&array_static[--last_static]);
855ea723 142 }
8d1f2ba5 143 av_freep(&array_static);
855ea723
ZK
144}
145
81c5f887
MN
146/**
147 * Frees memory and sets the pointer to NULL.
148 * @param arg pointer to the pointer which should be freed
149 */
150void av_freep(void *arg)
4d7a0a05 151{
81c5f887 152 void **ptr= (void**)arg;
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153 av_free(*ptr);
154 *ptr = NULL;
155}
156
de6d9b64 157/* encoder management */
8b69867f 158AVCodec *first_avcodec = NULL;
de6d9b64
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159
160void register_avcodec(AVCodec *format)
161{
162 AVCodec **p;
163 p = &first_avcodec;
164 while (*p != NULL) p = &(*p)->next;
165 *p = format;
166 format->next = NULL;
167}
168
21adafec
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169void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
170 s->coded_width = width;
171 s->coded_height= height;
172 s->width = -((-width )>>s->lowres);
173 s->height= -((-height)>>s->lowres);
174}
175
d90cf87b 176typedef struct InternalBuffer{
1e491e29 177 int last_pic_num;
d90cf87b 178 uint8_t *base[4];
1e491e29 179 uint8_t *data[4];
237e4938 180 int linesize[4];
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181}InternalBuffer;
182
183#define INTERNAL_BUFFER_SIZE 32
1e491e29 184
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185#define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
186
187void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
188 int w_align= 1;
189 int h_align= 1;
190
191 switch(s->pix_fmt){
192 case PIX_FMT_YUV420P:
193 case PIX_FMT_YUV422:
ebb177dd 194 case PIX_FMT_UYVY422:
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195 case PIX_FMT_YUV422P:
196 case PIX_FMT_YUV444P:
197 case PIX_FMT_GRAY8:
198 case PIX_FMT_YUVJ420P:
199 case PIX_FMT_YUVJ422P:
200 case PIX_FMT_YUVJ444P:
201 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
202 h_align= 16;
203 break;
204 case PIX_FMT_YUV411P:
f02be79d 205 case PIX_FMT_UYVY411:
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206 w_align=32;
207 h_align=8;
208 break;
209 case PIX_FMT_YUV410P:
210 if(s->codec_id == CODEC_ID_SVQ1){
211 w_align=64;
212 h_align=64;
213 }
d99fbbf4
RT
214 case PIX_FMT_RGB555:
215 if(s->codec_id == CODEC_ID_RPZA){
216 w_align=4;
217 h_align=4;
218 }
219 case PIX_FMT_PAL8:
220 if(s->codec_id == CODEC_ID_SMC){
221 w_align=4;
222 h_align=4;
223 }
f0bbfc4a 224 break;
c31b8121
RT
225 case PIX_FMT_BGR24:
226 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
227 w_align=4;
228 h_align=4;
229 }
230 break;
f0bbfc4a
MN
231 default:
232 w_align= 1;
233 h_align= 1;
234 break;
235 }
236
237 *width = ALIGN(*width , w_align);
238 *height= ALIGN(*height, h_align);
239}
240
0ecca7a4
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241int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
242 if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/4)
243 return 0;
244
245 av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
246 return -1;
247}
248
492cd3a9 249int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 250 int i;
f0bbfc4a
MN
251 int w= s->width;
252 int h= s->height;
d90cf87b 253 InternalBuffer *buf;
237e4938 254 int *picture_number;
0ecca7a4 255
4e00e76b 256 assert(pic->data[0]==NULL);
d90cf87b 257 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
1e491e29 258
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MN
259 if(avcodec_check_dimensions(s,w,h))
260 return -1;
261
d90cf87b
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262 if(s->internal_buffer==NULL){
263 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
264 }
265#if 0
266 s->internal_buffer= av_fast_realloc(
267 s->internal_buffer,
268 &s->internal_buffer_size,
269 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
270 );
271#endif
272
273 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
237e4938
MN
274 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
275 (*picture_number)++;
276
d90cf87b 277 if(buf->base[0]){
237e4938
MN
278 pic->age= *picture_number - buf->last_pic_num;
279 buf->last_pic_num= *picture_number;
1e491e29 280 }else{
f0bbfc4a 281 int h_chroma_shift, v_chroma_shift;
3237f731 282 int pixel_size;
1e491e29
MN
283
284 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
f0bbfc4a 285
1e491e29 286 switch(s->pix_fmt){
ba88675b
MN
287 case PIX_FMT_RGB555:
288 case PIX_FMT_RGB565:
1e491e29 289 case PIX_FMT_YUV422:
ebb177dd 290 case PIX_FMT_UYVY422:
1e491e29
MN
291 pixel_size=2;
292 break;
293 case PIX_FMT_RGB24:
294 case PIX_FMT_BGR24:
295 pixel_size=3;
296 break;
1e491e29
MN
297 case PIX_FMT_RGBA32:
298 pixel_size=4;
299 break;
300 default:
301 pixel_size=1;
302 }
f0bbfc4a
MN
303
304 avcodec_align_dimensions(s, &w, &h);
f0bbfc4a 305
1e491e29
MN
306 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
307 w+= EDGE_WIDTH*2;
308 h+= EDGE_WIDTH*2;
309 }
310
d90cf87b 311 buf->last_pic_num= -256*256*256*64;
1e491e29
MN
312
313 for(i=0; i<3; i++){
2c19981a
MN
314 const int h_shift= i==0 ? 0 : h_chroma_shift;
315 const int v_shift= i==0 ? 0 : v_chroma_shift;
1e491e29 316
7984082a 317 //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
3237f731 318 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, STRIDE_ALIGN<<(h_chroma_shift-h_shift));
1e491e29 319
f41c1fac 320 buf->base[i]= av_malloc((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
d90cf87b 321 if(buf->base[i]==NULL) return -1;
237e4938 322 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
1e491e29
MN
323
324 if(s->flags&CODEC_FLAG_EMU_EDGE)
d90cf87b 325 buf->data[i] = buf->base[i];
1e491e29 326 else
3237f731 327 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), STRIDE_ALIGN);
1e491e29
MN
328 }
329 pic->age= 256*256*256*64;
330 }
237e4938 331 pic->type= FF_BUFFER_TYPE_INTERNAL;
1e491e29 332
d90cf87b
MN
333 for(i=0; i<4; i++){
334 pic->base[i]= buf->base[i];
335 pic->data[i]= buf->data[i];
237e4938 336 pic->linesize[i]= buf->linesize[i];
d90cf87b
MN
337 }
338 s->internal_buffer_count++;
339
1e491e29
MN
340 return 0;
341}
342
492cd3a9 343void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 344 int i;
d90cf87b
MN
345 InternalBuffer *buf, *last, temp;
346
4e00e76b 347 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
59c673d5 348 assert(s->internal_buffer_count);
d90cf87b 349
b1609412 350 buf = NULL; /* avoids warning */
d90cf87b
MN
351 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
352 buf= &((InternalBuffer*)s->internal_buffer)[i];
353 if(buf->data[0] == pic->data[0])
354 break;
355 }
356 assert(i < s->internal_buffer_count);
357 s->internal_buffer_count--;
358 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
359
360 temp= *buf;
361 *buf= *last;
362 *last= temp;
363
364 for(i=0; i<3; i++){
1e491e29 365 pic->data[i]=NULL;
d90cf87b
MN
366// pic->base[i]=NULL;
367 }
1e491e29
MN
368//printf("R%X\n", pic->opaque);
369}
370
e1c2a5a0
RT
371int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
372 AVFrame temp_pic;
373 int i;
374
375 /* If no picture return a new buffer */
376 if(pic->data[0] == NULL) {
377 /* We will copy from buffer, so must be readable */
378 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
379 return s->get_buffer(s, pic);
380 }
381
382 /* If internal buffer type return the same buffer */
383 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
384 return 0;
385
386 /*
387 * Not internal type and reget_buffer not overridden, emulate cr buffer
388 */
389 temp_pic = *pic;
390 for(i = 0; i < 4; i++)
391 pic->data[i] = pic->base[i] = NULL;
392 pic->opaque = NULL;
393 /* Allocate new frame */
394 if (s->get_buffer(s, pic))
395 return -1;
396 /* Copy image data from old buffer to new buffer */
397 img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
398 s->height);
399 s->release_buffer(s, &temp_pic); // Release old frame
400 return 0;
401}
402
9c3d33d6
MN
403int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
404 int i;
405
406 for(i=0; i<count; i++){
407 int r= func(c, arg[i]);
408 if(ret) ret[i]= r;
409 }
410 return 0;
411}
412
494c56d3 413enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
a33c7159
MN
414 return fmt[0];
415}
416
43465395
MN
417static const char* context_to_name(void* ptr) {
418 AVCodecContext *avc= ptr;
419
420 if(avc && avc->codec && avc->codec->name)
421 return avc->codec->name;
422 else
423 return "NULL";
424}
425
426static AVClass av_codec_context_class = { "AVCodecContext", context_to_name };
427
a949d72e 428void avcodec_get_context_defaults(AVCodecContext *s){
9740beff
MN
429 memset(s, 0, sizeof(AVCodecContext));
430
43465395 431 s->av_class= &av_codec_context_class;
e8b62df6
MN
432 s->bit_rate= 800*1000;
433 s->bit_rate_tolerance= s->bit_rate*10;
a949d72e
MN
434 s->qmin= 2;
435 s->qmax= 31;
6e0d8c06
MN
436 s->mb_lmin= FF_QP2LAMBDA * 2;
437 s->mb_lmax= FF_QP2LAMBDA * 31;
a949d72e
MN
438 s->rc_eq= "tex^qComp";
439 s->qcompress= 0.5;
e8b62df6
MN
440 s->max_qdiff= 3;
441 s->b_quant_factor=1.25;
442 s->b_quant_offset=1.25;
b3a391e8 443 s->i_quant_factor=-0.8;
e8b62df6 444 s->i_quant_offset=0.0;
4d2858de 445 s->error_concealment= 3;
8d0e42ca 446 s->error_resilience= 1;
4d2858de 447 s->workaround_bugs= FF_BUG_AUTODETECT;
c0df9d75 448 s->time_base= (AVRational){0,1};
8d0e42ca
MN
449 s->gop_size= 50;
450 s->me_method= ME_EPZS;
1e491e29
MN
451 s->get_buffer= avcodec_default_get_buffer;
452 s->release_buffer= avcodec_default_release_buffer;
a33c7159 453 s->get_format= avcodec_default_get_format;
9c3d33d6
MN
454 s->execute= avcodec_default_execute;
455 s->thread_count=1;
826f429a 456 s->me_subpel_quality=8;
158c7f05
MN
457 s->lmin= FF_QP2LAMBDA * s->qmin;
458 s->lmax= FF_QP2LAMBDA * s->qmax;
5ff85f1d 459 s->sample_aspect_ratio= (AVRational){0,1};
620fe604 460 s->ildct_cmp= FF_CMP_VSAD;
baced9f5
MN
461 s->profile= FF_PROFILE_UNKNOWN;
462 s->level= FF_LEVEL_UNKNOWN;
09c3e44e 463 s->me_penalty_compensation= 256;
644a9262 464 s->pix_fmt= PIX_FMT_NONE;
1984f635
MN
465
466 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
467 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
2a2bbcb0 468 s->palctrl = NULL;
e1c2a5a0 469 s->reget_buffer= avcodec_default_reget_buffer;
a949d72e
MN
470}
471
472/**
473 * allocates a AVCodecContext and set it to defaults.
474 * this can be deallocated by simply calling free()
475 */
7ffbb60e 476AVCodecContext *avcodec_alloc_context(void){
9740beff 477 AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
a949d72e
MN
478
479 if(avctx==NULL) return NULL;
480
481 avcodec_get_context_defaults(avctx);
482
483 return avctx;
484}
485
9740beff
MN
486void avcodec_get_frame_defaults(AVFrame *pic){
487 memset(pic, 0, sizeof(AVFrame));
488
489 pic->pts= AV_NOPTS_VALUE;
c342499d 490 pic->key_frame= 1;
9740beff
MN
491}
492
1e491e29 493/**
492cd3a9 494 * allocates a AVPFrame and set it to defaults.
1e491e29
MN
495 * this can be deallocated by simply calling free()
496 */
492cd3a9 497AVFrame *avcodec_alloc_frame(void){
9740beff
MN
498 AVFrame *pic= av_malloc(sizeof(AVFrame));
499
500 if(pic==NULL) return NULL;
501
502 avcodec_get_frame_defaults(pic);
1e491e29
MN
503
504 return pic;
505}
506
de6d9b64
FB
507int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
508{
ddebfb15
MN
509 int ret= -1;
510
511 entangled_thread_counter++;
512 if(entangled_thread_counter != 1){
513 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
514 goto end;
515 }
de6d9b64 516
09770af8 517 if(avctx->codec)
ddebfb15 518 goto end;
09770af8 519
de6d9b64 520 avctx->codec = codec;
4cb3ca72 521 avctx->codec_id = codec->id;
de6d9b64 522 avctx->frame_number = 0;
0edf8a7a
PG
523 if (codec->priv_data_size > 0) {
524 avctx->priv_data = av_mallocz(codec->priv_data_size);
525 if (!avctx->priv_data)
ddebfb15 526 goto end;
0edf8a7a
PG
527 } else {
528 avctx->priv_data = NULL;
529 }
21adafec
MN
530
531 if(avctx->coded_width && avctx->coded_height)
532 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
533 else if(avctx->width && avctx->height)
534 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
535
0ecca7a4
MN
536 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
537 av_freep(&avctx->priv_data);
ddebfb15 538 goto end;
0ecca7a4
MN
539 }
540
de6d9b64
FB
541 ret = avctx->codec->init(avctx);
542 if (ret < 0) {
3123dd79 543 av_freep(&avctx->priv_data);
ddebfb15 544 goto end;
de6d9b64 545 }
ddebfb15
MN
546 ret=0;
547end:
548 entangled_thread_counter--;
549 return ret;
de6d9b64
FB
550}
551
0c1a9eda 552int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
de6d9b64
FB
553 const short *samples)
554{
0ecca7a4
MN
555 if(buf_size < FF_MIN_BUFFER_SIZE && 0){
556 av_log(avctx, AV_LOG_ERROR, "buffer smaller then minimum size\n");
557 return -1;
558 }
6f824977
MN
559 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
560 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
561 avctx->frame_number++;
562 return ret;
563 }else
564 return 0;
de6d9b64
FB
565}
566
0c1a9eda 567int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
492cd3a9 568 const AVFrame *pict)
de6d9b64 569{
0ecca7a4
MN
570 if(buf_size < FF_MIN_BUFFER_SIZE){
571 av_log(avctx, AV_LOG_ERROR, "buffer smaller then minimum size\n");
572 return -1;
573 }
574 if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
575 return -1;
6f824977
MN
576 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
577 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
578 avctx->frame_number++;
bb628dae 579 emms_c(); //needed to avoid an emms_c() call before every return;
6bb925f4 580
6f824977
MN
581 return ret;
582 }else
583 return 0;
de6d9b64
FB
584}
585
240c1657
FB
586int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
587 const AVSubtitle *sub)
588{
589 int ret;
590 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)sub);
591 avctx->frame_number++;
592 return ret;
593}
594
f138f883
MN
595/**
596 * decode a frame.
597 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
598 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
599 * @param buf_size the size of the buffer in bytes
600 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
601 * @return -1 if error, otherwise return the number of
602 * bytes used.
603 */
492cd3a9 604int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
de6d9b64 605 int *got_picture_ptr,
0c1a9eda 606 uint8_t *buf, int buf_size)
de6d9b64
FB
607{
608 int ret;
1e491e29 609
53db1cae 610 *got_picture_ptr= 0;
0ecca7a4
MN
611 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
612 return -1;
934982c4
MN
613 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
614 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
615 buf, buf_size);
6bb925f4 616
bb628dae 617 emms_c(); //needed to avoid an emms_c() call before every return;
1e491e29 618
934982c4
MN
619 if (*got_picture_ptr)
620 avctx->frame_number++;
621 }else
622 ret= 0;
623
de6d9b64
FB
624 return ret;
625}
626
627/* decode an audio frame. return -1 if error, otherwise return the
628 *number of bytes used. If no frame could be decompressed,
629 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
630 *size in BYTES. */
0c1a9eda 631int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
de6d9b64 632 int *frame_size_ptr,
0c1a9eda 633 uint8_t *buf, int buf_size)
de6d9b64
FB
634{
635 int ret;
636
53db1cae 637 *frame_size_ptr= 0;
fec9ccb7
MN
638 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
639 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
640 buf, buf_size);
641 avctx->frame_number++;
642 }else
643 ret= 0;
de6d9b64
FB
644 return ret;
645}
646
240c1657
FB
647/* decode a subtitle message. return -1 if error, otherwise return the
648 *number of bytes used. If no subtitle could be decompressed,
649 *got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
650int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
651 int *got_sub_ptr,
652 const uint8_t *buf, int buf_size)
653{
654 int ret;
655
656 *got_sub_ptr = 0;
657 ret = avctx->codec->decode(avctx, sub, got_sub_ptr,
658 (uint8_t *)buf, buf_size);
659 if (*got_sub_ptr)
660 avctx->frame_number++;
661 return ret;
662}
663
de6d9b64
FB
664int avcodec_close(AVCodecContext *avctx)
665{
ddebfb15
MN
666 entangled_thread_counter++;
667 if(entangled_thread_counter != 1){
668 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
669 entangled_thread_counter--;
670 return -1;
671 }
672
de6d9b64
FB
673 if (avctx->codec->close)
674 avctx->codec->close(avctx);
eea8c08f 675 avcodec_default_free_buffers(avctx);
3123dd79 676 av_freep(&avctx->priv_data);
de6d9b64 677 avctx->codec = NULL;
ddebfb15 678 entangled_thread_counter--;
de6d9b64
FB
679 return 0;
680}
681
682AVCodec *avcodec_find_encoder(enum CodecID id)
683{
684 AVCodec *p;
685 p = first_avcodec;
686 while (p) {
687 if (p->encode != NULL && p->id == id)
688 return p;
689 p = p->next;
690 }
691 return NULL;
692}
693
98f3b098
A
694AVCodec *avcodec_find_encoder_by_name(const char *name)
695{
696 AVCodec *p;
697 p = first_avcodec;
698 while (p) {
699 if (p->encode != NULL && strcmp(name,p->name) == 0)
700 return p;
701 p = p->next;
702 }
703 return NULL;
704}
705
de6d9b64
FB
706AVCodec *avcodec_find_decoder(enum CodecID id)
707{
708 AVCodec *p;
709 p = first_avcodec;
710 while (p) {
711 if (p->decode != NULL && p->id == id)
712 return p;
713 p = p->next;
714 }
715 return NULL;
716}
717
718AVCodec *avcodec_find_decoder_by_name(const char *name)
719{
720 AVCodec *p;
721 p = first_avcodec;
722 while (p) {
723 if (p->decode != NULL && strcmp(name,p->name) == 0)
724 return p;
725 p = p->next;
726 }
727 return NULL;
728}
729
de6d9b64
FB
730void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
731{
732 const char *codec_name;
733 AVCodec *p;
734 char buf1[32];
623563c0 735 char channels_str[100];
a96b68b7 736 int bitrate;
de6d9b64
FB
737
738 if (encode)
739 p = avcodec_find_encoder(enc->codec_id);
740 else
741 p = avcodec_find_decoder(enc->codec_id);
742
743 if (p) {
744 codec_name = p->name;
98ce5991
FB
745 if (!encode && enc->codec_id == CODEC_ID_MP3) {
746 if (enc->sub_id == 2)
747 codec_name = "mp2";
748 else if (enc->sub_id == 1)
749 codec_name = "mp1";
750 }
985180a1
FB
751 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
752 /* fake mpeg2 transport stream codec (currently not
753 registered) */
754 codec_name = "mpeg2ts";
de6d9b64
FB
755 } else if (enc->codec_name[0] != '\0') {
756 codec_name = enc->codec_name;
757 } else {
758 /* output avi tags */
759 if (enc->codec_type == CODEC_TYPE_VIDEO) {
760 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
761 enc->codec_tag & 0xff,
762 (enc->codec_tag >> 8) & 0xff,
763 (enc->codec_tag >> 16) & 0xff,
764 (enc->codec_tag >> 24) & 0xff);
765 } else {
766 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
767 }
768 codec_name = buf1;
769 }
770
771 switch(enc->codec_type) {
772 case CODEC_TYPE_VIDEO:
773 snprintf(buf, buf_size,
774 "Video: %s%s",
7d1c3fc1 775 codec_name, enc->mb_decision ? " (hq)" : "");
82c0c4ba 776 if (enc->pix_fmt != PIX_FMT_NONE) {
cf087595
FB
777 snprintf(buf + strlen(buf), buf_size - strlen(buf),
778 ", %s",
9bbffbb1 779 avcodec_get_pix_fmt_name(enc->pix_fmt));
cf087595 780 }
de6d9b64
FB
781 if (enc->width) {
782 snprintf(buf + strlen(buf), buf_size - strlen(buf),
783 ", %dx%d, %0.2f fps",
784 enc->width, enc->height,
c0df9d75 785 1/av_q2d(enc->time_base));
de6d9b64 786 }
4bfad535
FB
787 if (encode) {
788 snprintf(buf + strlen(buf), buf_size - strlen(buf),
789 ", q=%d-%d", enc->qmin, enc->qmax);
790 }
a96b68b7 791 bitrate = enc->bit_rate;
de6d9b64
FB
792 break;
793 case CODEC_TYPE_AUDIO:
794 snprintf(buf, buf_size,
795 "Audio: %s",
796 codec_name);
e0d2714a
J
797 switch (enc->channels) {
798 case 1:
623563c0 799 strcpy(channels_str, "mono");
e0d2714a
J
800 break;
801 case 2:
623563c0 802 strcpy(channels_str, "stereo");
e0d2714a
J
803 break;
804 case 6:
623563c0 805 strcpy(channels_str, "5:1");
e0d2714a
J
806 break;
807 default:
2fc8ea24 808 snprintf(channels_str, sizeof(channels_str), "%d channels", enc->channels);
e0d2714a
J
809 break;
810 }
de6d9b64
FB
811 if (enc->sample_rate) {
812 snprintf(buf + strlen(buf), buf_size - strlen(buf),
813 ", %d Hz, %s",
814 enc->sample_rate,
e0d2714a 815 channels_str);
de6d9b64 816 }
e0d2714a 817
a96b68b7
FB
818 /* for PCM codecs, compute bitrate directly */
819 switch(enc->codec_id) {
820 case CODEC_ID_PCM_S16LE:
821 case CODEC_ID_PCM_S16BE:
822 case CODEC_ID_PCM_U16LE:
823 case CODEC_ID_PCM_U16BE:
a190b7e9 824 bitrate = enc->sample_rate * enc->channels * 16;
a96b68b7
FB
825 break;
826 case CODEC_ID_PCM_S8:
827 case CODEC_ID_PCM_U8:
828 case CODEC_ID_PCM_ALAW:
829 case CODEC_ID_PCM_MULAW:
a190b7e9 830 bitrate = enc->sample_rate * enc->channels * 8;
a96b68b7
FB
831 break;
832 default:
833 bitrate = enc->bit_rate;
834 break;
835 }
de6d9b64 836 break;
985180a1
FB
837 case CODEC_TYPE_DATA:
838 snprintf(buf, buf_size, "Data: %s", codec_name);
240c1657
FB
839 bitrate = enc->bit_rate;
840 break;
841 case CODEC_TYPE_SUBTITLE:
842 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
985180a1
FB
843 bitrate = enc->bit_rate;
844 break;
de6d9b64 845 default:
9fe5a7b8
MN
846 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
847 return;
de6d9b64 848 }
4bfad535
FB
849 if (encode) {
850 if (enc->flags & CODEC_FLAG_PASS1)
851 snprintf(buf + strlen(buf), buf_size - strlen(buf),
852 ", pass 1");
853 if (enc->flags & CODEC_FLAG_PASS2)
854 snprintf(buf + strlen(buf), buf_size - strlen(buf),
855 ", pass 2");
856 }
a96b68b7 857 if (bitrate != 0) {
de6d9b64 858 snprintf(buf + strlen(buf), buf_size - strlen(buf),
a96b68b7 859 ", %d kb/s", bitrate / 1000);
de6d9b64
FB
860 }
861}
862
156e5023
NK
863unsigned avcodec_version( void )
864{
865 return LIBAVCODEC_VERSION_INT;
866}
cf087595 867
8bceb6af
NK
868unsigned avcodec_build( void )
869{
870 return LIBAVCODEC_BUILD;
871}
872
de6d9b64
FB
873/* must be called before any other functions */
874void avcodec_init(void)
875{
0344cd0a
AB
876 static int inited = 0;
877
878 if (inited != 0)
879 return;
880 inited = 1;
881
59cf08ce 882 dsputil_static_init();
de6d9b64
FB
883}
884
7a06ff14
MN
885/**
886 * Flush buffers, should be called when seeking or when swicthing to a different stream.
887 */
1c2a8c7f
MN
888void avcodec_flush_buffers(AVCodecContext *avctx)
889{
7a06ff14
MN
890 if(avctx->codec->flush)
891 avctx->codec->flush(avctx);
1c2a8c7f
MN
892}
893
b100eab8 894void avcodec_default_free_buffers(AVCodecContext *s){
d90cf87b
MN
895 int i, j;
896
897 if(s->internal_buffer==NULL) return;
898
899 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
900 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
901 for(j=0; j<4; j++){
902 av_freep(&buf->base[j]);
903 buf->data[j]= NULL;
904 }
905 }
906 av_freep(&s->internal_buffer);
907
908 s->internal_buffer_count=0;
909}
910
d8085ea7
MN
911char av_get_pict_type_char(int pict_type){
912 switch(pict_type){
913 case I_TYPE: return 'I';
914 case P_TYPE: return 'P';
915 case B_TYPE: return 'B';
916 case S_TYPE: return 'S';
917 case SI_TYPE:return 'i';
918 case SP_TYPE:return 'p';
919 default: return '?';
920 }
921}
922
9b879566
MB
923/* av_log API */
924
e18c1f19 925static int av_log_level = AV_LOG_INFO;
9b879566 926
bc874dae 927static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
9b879566 928{
89b9441a 929 static int print_prefix=1;
43465395 930 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
9b879566 931 if(level>av_log_level)
bc874dae 932 return;
d705e4a6 933#undef fprintf
43465395
MN
934 if(print_prefix && avc) {
935 fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
bc874dae 936 }
d705e4a6 937#define fprintf please_use_av_log
89b9441a 938
95ba2c8f 939 print_prefix= strstr(fmt, "\n") != NULL;
89b9441a 940
9b879566
MB
941 vfprintf(stderr, fmt, vl);
942}
943
bc874dae 944static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
9b879566 945
bc874dae 946void av_log(void* avcl, int level, const char *fmt, ...)
9b879566
MB
947{
948 va_list vl;
949 va_start(vl, fmt);
bc874dae 950 av_vlog(avcl, level, fmt, vl);
9b879566
MB
951 va_end(vl);
952}
953
bc874dae 954void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
9b879566 955{
bc874dae 956 av_log_callback(avcl, level, fmt, vl);
9b879566
MB
957}
958
959int av_log_get_level(void)
960{
961 return av_log_level;
962}
963
964void av_log_set_level(int level)
965{
966 av_log_level = level;
967}
968
bc874dae 969void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
9b879566
MB
970{
971 av_log_callback = callback;
972}
973
2450cff2 974#if !defined(HAVE_THREADS)
ca8ad847
MN
975int avcodec_thread_init(AVCodecContext *s, int thread_count){
976 return -1;
977}
978#endif
ad2b531d
MR
979
980unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
981{
982 unsigned int n = 0;
983
984 while(v >= 0xff) {
985 *s++ = 0xff;
986 v -= 0xff;
987 n++;
988 }
989 *s = v;
990 n++;
991 return n;
992}