fix mimetype
[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
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34const uint8_t ff_sqrt_tab[128]={
35 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5,
36 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
37 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
38 9, 9, 9, 9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11
39};
40
41const uint8_t ff_log2_tab[256]={
42 0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
43 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
44 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
45 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
46 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
47 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
48 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
49 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
50};
51
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52const uint8_t ff_reverse[256]={
530x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
540x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
550x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
560x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
570x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
580x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
590x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
600x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
610x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
620x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
630x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
640x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
650x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
660x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
670x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
680x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
69};
70
b100eab8 71void avcodec_default_free_buffers(AVCodecContext *s);
eea8c08f 72
18f77016 73void *av_mallocz(unsigned int size)
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74{
75 void *ptr;
5b20b732 76
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77 ptr = av_malloc(size);
78 if (!ptr)
79 return NULL;
80 memset(ptr, 0, size);
81 return ptr;
82}
83
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84char *av_strdup(const char *s)
85{
86 char *ptr;
87 int len;
88 len = strlen(s) + 1;
89 ptr = av_malloc(len);
90 if (!ptr)
91 return NULL;
92 memcpy(ptr, s, len);
93 return ptr;
94}
95
96/**
97 * realloc which does nothing if the block is large enough
98 */
5c91a675 99void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
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100{
101 if(min_size < *size)
102 return ptr;
103
0ecca7a4 104 *size= FFMAX(17*min_size/16 + 32, min_size);
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105
106 return av_realloc(ptr, *size);
107}
108
109
855ea723 110static unsigned int last_static = 0;
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111static unsigned int allocated_static = 0;
112static void** array_static = NULL;
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113
114/**
115 * allocation of static arrays - do not use for normal allocation.
116 */
117void *av_mallocz_static(unsigned int size)
855ea723 118{
855ea723 119 void *ptr = av_mallocz(size);
855ea723 120
8d1f2ba5 121 if(ptr){
4e39ab4c 122 array_static =av_fast_realloc(array_static, &allocated_static, sizeof(void*)*(last_static+1));
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123 if(!array_static)
124 return NULL;
8d1f2ba5 125 array_static[last_static++] = ptr;
855ea723 126 }
8d1f2ba5 127
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128 return ptr;
129}
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130
131/**
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132 * same as above, but does realloc
133 */
134
135void *av_realloc_static(void *ptr, unsigned int size)
136{
137 int i;
138 if(!ptr)
139 return av_mallocz_static(size);
140 /* Look for the old ptr */
141 for(i = 0; i < last_static; i++) {
142 if(array_static[i] == ptr) {
143 array_static[i] = av_realloc(array_static[i], size);
144 return array_static[i];
145 }
146 }
147 return NULL;
148
149}
150
151/**
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152 * free all static arrays and reset pointers to 0.
153 */
4cfbf61b 154void av_free_static(void)
855ea723 155{
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156 while(last_static){
157 av_freep(&array_static[--last_static]);
855ea723 158 }
8d1f2ba5 159 av_freep(&array_static);
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160}
161
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162/**
163 * Frees memory and sets the pointer to NULL.
164 * @param arg pointer to the pointer which should be freed
165 */
166void av_freep(void *arg)
4d7a0a05 167{
81c5f887 168 void **ptr= (void**)arg;
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169 av_free(*ptr);
170 *ptr = NULL;
171}
172
de6d9b64 173/* encoder management */
8b69867f 174AVCodec *first_avcodec = NULL;
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175
176void register_avcodec(AVCodec *format)
177{
178 AVCodec **p;
179 p = &first_avcodec;
180 while (*p != NULL) p = &(*p)->next;
181 *p = format;
182 format->next = NULL;
183}
184
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185void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
186 s->coded_width = width;
187 s->coded_height= height;
188 s->width = -((-width )>>s->lowres);
189 s->height= -((-height)>>s->lowres);
190}
191
d90cf87b 192typedef struct InternalBuffer{
1e491e29 193 int last_pic_num;
d90cf87b 194 uint8_t *base[4];
1e491e29 195 uint8_t *data[4];
237e4938 196 int linesize[4];
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197}InternalBuffer;
198
199#define INTERNAL_BUFFER_SIZE 32
1e491e29 200
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201#define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
202
203void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
204 int w_align= 1;
205 int h_align= 1;
206
207 switch(s->pix_fmt){
208 case PIX_FMT_YUV420P:
209 case PIX_FMT_YUV422:
ebb177dd 210 case PIX_FMT_UYVY422:
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211 case PIX_FMT_YUV422P:
212 case PIX_FMT_YUV444P:
213 case PIX_FMT_GRAY8:
214 case PIX_FMT_YUVJ420P:
215 case PIX_FMT_YUVJ422P:
216 case PIX_FMT_YUVJ444P:
217 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
218 h_align= 16;
219 break;
220 case PIX_FMT_YUV411P:
f02be79d 221 case PIX_FMT_UYVY411:
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222 w_align=32;
223 h_align=8;
224 break;
225 case PIX_FMT_YUV410P:
226 if(s->codec_id == CODEC_ID_SVQ1){
227 w_align=64;
228 h_align=64;
229 }
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230 case PIX_FMT_RGB555:
231 if(s->codec_id == CODEC_ID_RPZA){
232 w_align=4;
233 h_align=4;
234 }
235 case PIX_FMT_PAL8:
236 if(s->codec_id == CODEC_ID_SMC){
237 w_align=4;
238 h_align=4;
239 }
f0bbfc4a 240 break;
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241 case PIX_FMT_BGR24:
242 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
243 w_align=4;
244 h_align=4;
245 }
246 break;
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247 default:
248 w_align= 1;
249 h_align= 1;
250 break;
251 }
252
253 *width = ALIGN(*width , w_align);
254 *height= ALIGN(*height, h_align);
255}
256
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257int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
258 if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/4)
259 return 0;
260
261 av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
262 return -1;
263}
264
492cd3a9 265int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 266 int i;
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267 int w= s->width;
268 int h= s->height;
d90cf87b 269 InternalBuffer *buf;
237e4938 270 int *picture_number;
0ecca7a4 271
4e00e76b 272 assert(pic->data[0]==NULL);
d90cf87b 273 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
1e491e29 274
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275 if(avcodec_check_dimensions(s,w,h))
276 return -1;
277
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278 if(s->internal_buffer==NULL){
279 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
280 }
281#if 0
282 s->internal_buffer= av_fast_realloc(
283 s->internal_buffer,
284 &s->internal_buffer_size,
285 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
286 );
287#endif
288
289 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
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290 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
291 (*picture_number)++;
292
d90cf87b 293 if(buf->base[0]){
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294 pic->age= *picture_number - buf->last_pic_num;
295 buf->last_pic_num= *picture_number;
1e491e29 296 }else{
f0bbfc4a 297 int h_chroma_shift, v_chroma_shift;
3237f731 298 int pixel_size;
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299
300 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
f0bbfc4a 301
1e491e29 302 switch(s->pix_fmt){
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303 case PIX_FMT_RGB555:
304 case PIX_FMT_RGB565:
1e491e29 305 case PIX_FMT_YUV422:
ebb177dd 306 case PIX_FMT_UYVY422:
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307 pixel_size=2;
308 break;
309 case PIX_FMT_RGB24:
310 case PIX_FMT_BGR24:
311 pixel_size=3;
312 break;
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313 case PIX_FMT_RGBA32:
314 pixel_size=4;
315 break;
316 default:
317 pixel_size=1;
318 }
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319
320 avcodec_align_dimensions(s, &w, &h);
f0bbfc4a 321
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322 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
323 w+= EDGE_WIDTH*2;
324 h+= EDGE_WIDTH*2;
325 }
326
d90cf87b 327 buf->last_pic_num= -256*256*256*64;
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328
329 for(i=0; i<3; i++){
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330 const int h_shift= i==0 ? 0 : h_chroma_shift;
331 const int v_shift= i==0 ? 0 : v_chroma_shift;
1e491e29 332
7984082a 333 //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
3237f731 334 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, STRIDE_ALIGN<<(h_chroma_shift-h_shift));
1e491e29 335
f41c1fac 336 buf->base[i]= av_malloc((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
d90cf87b 337 if(buf->base[i]==NULL) return -1;
237e4938 338 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
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339
340 if(s->flags&CODEC_FLAG_EMU_EDGE)
d90cf87b 341 buf->data[i] = buf->base[i];
1e491e29 342 else
3237f731 343 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), STRIDE_ALIGN);
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344 }
345 pic->age= 256*256*256*64;
346 }
237e4938 347 pic->type= FF_BUFFER_TYPE_INTERNAL;
1e491e29 348
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349 for(i=0; i<4; i++){
350 pic->base[i]= buf->base[i];
351 pic->data[i]= buf->data[i];
237e4938 352 pic->linesize[i]= buf->linesize[i];
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353 }
354 s->internal_buffer_count++;
355
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356 return 0;
357}
358
492cd3a9 359void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
1e491e29 360 int i;
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361 InternalBuffer *buf, *last, temp;
362
4e00e76b 363 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
59c673d5 364 assert(s->internal_buffer_count);
d90cf87b 365
b1609412 366 buf = NULL; /* avoids warning */
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367 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
368 buf= &((InternalBuffer*)s->internal_buffer)[i];
369 if(buf->data[0] == pic->data[0])
370 break;
371 }
372 assert(i < s->internal_buffer_count);
373 s->internal_buffer_count--;
374 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
375
376 temp= *buf;
377 *buf= *last;
378 *last= temp;
379
380 for(i=0; i<3; i++){
1e491e29 381 pic->data[i]=NULL;
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382// pic->base[i]=NULL;
383 }
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384//printf("R%X\n", pic->opaque);
385}
386
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387int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
388 AVFrame temp_pic;
389 int i;
390
391 /* If no picture return a new buffer */
392 if(pic->data[0] == NULL) {
393 /* We will copy from buffer, so must be readable */
394 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
395 return s->get_buffer(s, pic);
396 }
397
398 /* If internal buffer type return the same buffer */
399 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
400 return 0;
401
402 /*
403 * Not internal type and reget_buffer not overridden, emulate cr buffer
404 */
405 temp_pic = *pic;
406 for(i = 0; i < 4; i++)
407 pic->data[i] = pic->base[i] = NULL;
408 pic->opaque = NULL;
409 /* Allocate new frame */
410 if (s->get_buffer(s, pic))
411 return -1;
412 /* Copy image data from old buffer to new buffer */
413 img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
414 s->height);
415 s->release_buffer(s, &temp_pic); // Release old frame
416 return 0;
417}
418
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419int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
420 int i;
421
422 for(i=0; i<count; i++){
423 int r= func(c, arg[i]);
424 if(ret) ret[i]= r;
425 }
426 return 0;
427}
428
494c56d3 429enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
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430 return fmt[0];
431}
432
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433static const char* context_to_name(void* ptr) {
434 AVCodecContext *avc= ptr;
435
436 if(avc && avc->codec && avc->codec->name)
437 return avc->codec->name;
438 else
439 return "NULL";
440}
441
442static AVClass av_codec_context_class = { "AVCodecContext", context_to_name };
443
a949d72e 444void avcodec_get_context_defaults(AVCodecContext *s){
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445 memset(s, 0, sizeof(AVCodecContext));
446
43465395 447 s->av_class= &av_codec_context_class;
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448 s->bit_rate= 800*1000;
449 s->bit_rate_tolerance= s->bit_rate*10;
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450 s->qmin= 2;
451 s->qmax= 31;
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452 s->mb_lmin= FF_QP2LAMBDA * 2;
453 s->mb_lmax= FF_QP2LAMBDA * 31;
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454 s->rc_eq= "tex^qComp";
455 s->qcompress= 0.5;
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456 s->max_qdiff= 3;
457 s->b_quant_factor=1.25;
458 s->b_quant_offset=1.25;
b3a391e8 459 s->i_quant_factor=-0.8;
e8b62df6 460 s->i_quant_offset=0.0;
4d2858de 461 s->error_concealment= 3;
8d0e42ca 462 s->error_resilience= 1;
4d2858de 463 s->workaround_bugs= FF_BUG_AUTODETECT;
c0df9d75 464 s->time_base= (AVRational){0,1};
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465 s->gop_size= 50;
466 s->me_method= ME_EPZS;
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467 s->get_buffer= avcodec_default_get_buffer;
468 s->release_buffer= avcodec_default_release_buffer;
a33c7159 469 s->get_format= avcodec_default_get_format;
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470 s->execute= avcodec_default_execute;
471 s->thread_count=1;
826f429a 472 s->me_subpel_quality=8;
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473 s->lmin= FF_QP2LAMBDA * s->qmin;
474 s->lmax= FF_QP2LAMBDA * s->qmax;
5ff85f1d 475 s->sample_aspect_ratio= (AVRational){0,1};
620fe604 476 s->ildct_cmp= FF_CMP_VSAD;
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477 s->profile= FF_PROFILE_UNKNOWN;
478 s->level= FF_LEVEL_UNKNOWN;
09c3e44e 479 s->me_penalty_compensation= 256;
644a9262 480 s->pix_fmt= PIX_FMT_NONE;
1984f635
MN
481
482 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
483 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
2a2bbcb0 484 s->palctrl = NULL;
e1c2a5a0 485 s->reget_buffer= avcodec_default_reget_buffer;
a949d72e
MN
486}
487
488/**
489 * allocates a AVCodecContext and set it to defaults.
490 * this can be deallocated by simply calling free()
491 */
7ffbb60e 492AVCodecContext *avcodec_alloc_context(void){
9740beff 493 AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
a949d72e
MN
494
495 if(avctx==NULL) return NULL;
496
497 avcodec_get_context_defaults(avctx);
498
499 return avctx;
500}
501
9740beff
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502void avcodec_get_frame_defaults(AVFrame *pic){
503 memset(pic, 0, sizeof(AVFrame));
504
505 pic->pts= AV_NOPTS_VALUE;
c342499d 506 pic->key_frame= 1;
9740beff
MN
507}
508
1e491e29 509/**
492cd3a9 510 * allocates a AVPFrame and set it to defaults.
1e491e29
MN
511 * this can be deallocated by simply calling free()
512 */
492cd3a9 513AVFrame *avcodec_alloc_frame(void){
9740beff
MN
514 AVFrame *pic= av_malloc(sizeof(AVFrame));
515
516 if(pic==NULL) return NULL;
517
518 avcodec_get_frame_defaults(pic);
1e491e29
MN
519
520 return pic;
521}
522
de6d9b64
FB
523int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
524{
525 int ret;
526
09770af8
MN
527 if(avctx->codec)
528 return -1;
529
de6d9b64 530 avctx->codec = codec;
4cb3ca72 531 avctx->codec_id = codec->id;
de6d9b64 532 avctx->frame_number = 0;
0edf8a7a
PG
533 if (codec->priv_data_size > 0) {
534 avctx->priv_data = av_mallocz(codec->priv_data_size);
535 if (!avctx->priv_data)
536 return -ENOMEM;
537 } else {
538 avctx->priv_data = NULL;
539 }
21adafec
MN
540
541 if(avctx->coded_width && avctx->coded_height)
542 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
543 else if(avctx->width && avctx->height)
544 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
545
0ecca7a4
MN
546 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
547 av_freep(&avctx->priv_data);
548 return -1;
549 }
550
de6d9b64
FB
551 ret = avctx->codec->init(avctx);
552 if (ret < 0) {
3123dd79 553 av_freep(&avctx->priv_data);
de6d9b64
FB
554 return ret;
555 }
556 return 0;
557}
558
0c1a9eda 559int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
de6d9b64
FB
560 const short *samples)
561{
0ecca7a4
MN
562 if(buf_size < FF_MIN_BUFFER_SIZE && 0){
563 av_log(avctx, AV_LOG_ERROR, "buffer smaller then minimum size\n");
564 return -1;
565 }
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MN
566 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
567 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
568 avctx->frame_number++;
569 return ret;
570 }else
571 return 0;
de6d9b64
FB
572}
573
0c1a9eda 574int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
492cd3a9 575 const AVFrame *pict)
de6d9b64 576{
0ecca7a4
MN
577 if(buf_size < FF_MIN_BUFFER_SIZE){
578 av_log(avctx, AV_LOG_ERROR, "buffer smaller then minimum size\n");
579 return -1;
580 }
581 if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
582 return -1;
6f824977
MN
583 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
584 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
585 avctx->frame_number++;
586 emms_c(); //needed to avoid a emms_c() call before every return;
6bb925f4 587
6f824977
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588 return ret;
589 }else
590 return 0;
de6d9b64
FB
591}
592
f138f883
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593/**
594 * decode a frame.
595 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
596 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
597 * @param buf_size the size of the buffer in bytes
598 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
599 * @return -1 if error, otherwise return the number of
600 * bytes used.
601 */
492cd3a9 602int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
de6d9b64 603 int *got_picture_ptr,
0c1a9eda 604 uint8_t *buf, int buf_size)
de6d9b64
FB
605{
606 int ret;
1e491e29 607
53db1cae 608 *got_picture_ptr= 0;
0ecca7a4
MN
609 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
610 return -1;
934982c4
MN
611 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
612 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
613 buf, buf_size);
6bb925f4 614
934982c4 615 emms_c(); //needed to avoid a emms_c() call before every return;
1e491e29 616
934982c4
MN
617 if (*got_picture_ptr)
618 avctx->frame_number++;
619 }else
620 ret= 0;
621
de6d9b64
FB
622 return ret;
623}
624
625/* decode an audio frame. return -1 if error, otherwise return the
626 *number of bytes used. If no frame could be decompressed,
627 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
628 *size in BYTES. */
0c1a9eda 629int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
de6d9b64 630 int *frame_size_ptr,
0c1a9eda 631 uint8_t *buf, int buf_size)
de6d9b64
FB
632{
633 int ret;
634
53db1cae 635 *frame_size_ptr= 0;
de6d9b64
FB
636 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
637 buf, buf_size);
638 avctx->frame_number++;
639 return ret;
640}
641
642int avcodec_close(AVCodecContext *avctx)
643{
644 if (avctx->codec->close)
645 avctx->codec->close(avctx);
eea8c08f 646 avcodec_default_free_buffers(avctx);
3123dd79 647 av_freep(&avctx->priv_data);
de6d9b64
FB
648 avctx->codec = NULL;
649 return 0;
650}
651
652AVCodec *avcodec_find_encoder(enum CodecID id)
653{
654 AVCodec *p;
655 p = first_avcodec;
656 while (p) {
657 if (p->encode != NULL && p->id == id)
658 return p;
659 p = p->next;
660 }
661 return NULL;
662}
663
98f3b098
A
664AVCodec *avcodec_find_encoder_by_name(const char *name)
665{
666 AVCodec *p;
667 p = first_avcodec;
668 while (p) {
669 if (p->encode != NULL && strcmp(name,p->name) == 0)
670 return p;
671 p = p->next;
672 }
673 return NULL;
674}
675
de6d9b64
FB
676AVCodec *avcodec_find_decoder(enum CodecID id)
677{
678 AVCodec *p;
679 p = first_avcodec;
680 while (p) {
681 if (p->decode != NULL && p->id == id)
682 return p;
683 p = p->next;
684 }
685 return NULL;
686}
687
688AVCodec *avcodec_find_decoder_by_name(const char *name)
689{
690 AVCodec *p;
691 p = first_avcodec;
692 while (p) {
693 if (p->decode != NULL && strcmp(name,p->name) == 0)
694 return p;
695 p = p->next;
696 }
697 return NULL;
698}
699
de6d9b64
FB
700void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
701{
702 const char *codec_name;
703 AVCodec *p;
704 char buf1[32];
623563c0 705 char channels_str[100];
a96b68b7 706 int bitrate;
de6d9b64
FB
707
708 if (encode)
709 p = avcodec_find_encoder(enc->codec_id);
710 else
711 p = avcodec_find_decoder(enc->codec_id);
712
713 if (p) {
714 codec_name = p->name;
98ce5991
FB
715 if (!encode && enc->codec_id == CODEC_ID_MP3) {
716 if (enc->sub_id == 2)
717 codec_name = "mp2";
718 else if (enc->sub_id == 1)
719 codec_name = "mp1";
720 }
985180a1
FB
721 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
722 /* fake mpeg2 transport stream codec (currently not
723 registered) */
724 codec_name = "mpeg2ts";
de6d9b64
FB
725 } else if (enc->codec_name[0] != '\0') {
726 codec_name = enc->codec_name;
727 } else {
728 /* output avi tags */
729 if (enc->codec_type == CODEC_TYPE_VIDEO) {
730 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
731 enc->codec_tag & 0xff,
732 (enc->codec_tag >> 8) & 0xff,
733 (enc->codec_tag >> 16) & 0xff,
734 (enc->codec_tag >> 24) & 0xff);
735 } else {
736 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
737 }
738 codec_name = buf1;
739 }
740
741 switch(enc->codec_type) {
742 case CODEC_TYPE_VIDEO:
743 snprintf(buf, buf_size,
744 "Video: %s%s",
7d1c3fc1 745 codec_name, enc->mb_decision ? " (hq)" : "");
82c0c4ba 746 if (enc->pix_fmt != PIX_FMT_NONE) {
cf087595
FB
747 snprintf(buf + strlen(buf), buf_size - strlen(buf),
748 ", %s",
9bbffbb1 749 avcodec_get_pix_fmt_name(enc->pix_fmt));
cf087595 750 }
de6d9b64
FB
751 if (enc->width) {
752 snprintf(buf + strlen(buf), buf_size - strlen(buf),
753 ", %dx%d, %0.2f fps",
754 enc->width, enc->height,
c0df9d75 755 1/av_q2d(enc->time_base));
de6d9b64 756 }
4bfad535
FB
757 if (encode) {
758 snprintf(buf + strlen(buf), buf_size - strlen(buf),
759 ", q=%d-%d", enc->qmin, enc->qmax);
760 }
a96b68b7 761 bitrate = enc->bit_rate;
de6d9b64
FB
762 break;
763 case CODEC_TYPE_AUDIO:
764 snprintf(buf, buf_size,
765 "Audio: %s",
766 codec_name);
e0d2714a
J
767 switch (enc->channels) {
768 case 1:
623563c0 769 strcpy(channels_str, "mono");
e0d2714a
J
770 break;
771 case 2:
623563c0 772 strcpy(channels_str, "stereo");
e0d2714a
J
773 break;
774 case 6:
623563c0 775 strcpy(channels_str, "5:1");
e0d2714a
J
776 break;
777 default:
2fc8ea24 778 snprintf(channels_str, sizeof(channels_str), "%d channels", enc->channels);
e0d2714a
J
779 break;
780 }
de6d9b64
FB
781 if (enc->sample_rate) {
782 snprintf(buf + strlen(buf), buf_size - strlen(buf),
783 ", %d Hz, %s",
784 enc->sample_rate,
e0d2714a 785 channels_str);
de6d9b64 786 }
e0d2714a 787
a96b68b7
FB
788 /* for PCM codecs, compute bitrate directly */
789 switch(enc->codec_id) {
790 case CODEC_ID_PCM_S16LE:
791 case CODEC_ID_PCM_S16BE:
792 case CODEC_ID_PCM_U16LE:
793 case CODEC_ID_PCM_U16BE:
a190b7e9 794 bitrate = enc->sample_rate * enc->channels * 16;
a96b68b7
FB
795 break;
796 case CODEC_ID_PCM_S8:
797 case CODEC_ID_PCM_U8:
798 case CODEC_ID_PCM_ALAW:
799 case CODEC_ID_PCM_MULAW:
a190b7e9 800 bitrate = enc->sample_rate * enc->channels * 8;
a96b68b7
FB
801 break;
802 default:
803 bitrate = enc->bit_rate;
804 break;
805 }
de6d9b64 806 break;
985180a1
FB
807 case CODEC_TYPE_DATA:
808 snprintf(buf, buf_size, "Data: %s", codec_name);
809 bitrate = enc->bit_rate;
810 break;
de6d9b64 811 default:
9fe5a7b8
MN
812 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
813 return;
de6d9b64 814 }
4bfad535
FB
815 if (encode) {
816 if (enc->flags & CODEC_FLAG_PASS1)
817 snprintf(buf + strlen(buf), buf_size - strlen(buf),
818 ", pass 1");
819 if (enc->flags & CODEC_FLAG_PASS2)
820 snprintf(buf + strlen(buf), buf_size - strlen(buf),
821 ", pass 2");
822 }
a96b68b7 823 if (bitrate != 0) {
de6d9b64 824 snprintf(buf + strlen(buf), buf_size - strlen(buf),
a96b68b7 825 ", %d kb/s", bitrate / 1000);
de6d9b64
FB
826 }
827}
828
156e5023
NK
829unsigned avcodec_version( void )
830{
831 return LIBAVCODEC_VERSION_INT;
832}
cf087595 833
8bceb6af
NK
834unsigned avcodec_build( void )
835{
836 return LIBAVCODEC_BUILD;
837}
838
de6d9b64
FB
839/* must be called before any other functions */
840void avcodec_init(void)
841{
0344cd0a
AB
842 static int inited = 0;
843
844 if (inited != 0)
845 return;
846 inited = 1;
847
59cf08ce 848 dsputil_static_init();
de6d9b64
FB
849}
850
7a06ff14
MN
851/**
852 * Flush buffers, should be called when seeking or when swicthing to a different stream.
853 */
1c2a8c7f
MN
854void avcodec_flush_buffers(AVCodecContext *avctx)
855{
7a06ff14
MN
856 if(avctx->codec->flush)
857 avctx->codec->flush(avctx);
1c2a8c7f
MN
858}
859
b100eab8 860void avcodec_default_free_buffers(AVCodecContext *s){
d90cf87b
MN
861 int i, j;
862
863 if(s->internal_buffer==NULL) return;
864
865 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
866 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
867 for(j=0; j<4; j++){
868 av_freep(&buf->base[j]);
869 buf->data[j]= NULL;
870 }
871 }
872 av_freep(&s->internal_buffer);
873
874 s->internal_buffer_count=0;
875}
876
d8085ea7
MN
877char av_get_pict_type_char(int pict_type){
878 switch(pict_type){
879 case I_TYPE: return 'I';
880 case P_TYPE: return 'P';
881 case B_TYPE: return 'B';
882 case S_TYPE: return 'S';
883 case SI_TYPE:return 'i';
884 case SP_TYPE:return 'p';
885 default: return '?';
886 }
887}
888
14bea432 889int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
5f63d108
MN
890 AVRational a0={0,1}, a1={1,0};
891 int sign= (nom<0) ^ (den<0);
892 int64_t gcd= ff_gcd(ABS(nom), ABS(den));
893
894 nom = ABS(nom)/gcd;
895 den = ABS(den)/gcd;
896 if(nom<=max && den<=max){
897 a1= (AVRational){nom, den};
898 den=0;
14bea432
MN
899 }
900
5f63d108
MN
901 while(den){
902 int64_t x = nom / den;
903 int64_t next_den= nom - den*x;
904 int64_t a2n= x*a1.num + a0.num;
905 int64_t a2d= x*a1.den + a0.den;
906
907 if(a2n > max || a2d > max) break;
908
909 a0= a1;
910 a1= (AVRational){a2n, a2d};
911 nom= den;
912 den= next_den;
913 }
914 assert(ff_gcd(a1.num, a1.den) == 1);
5ed9f2e5 915
5f63d108
MN
916 *dst_nom = sign ? -a1.num : a1.num;
917 *dst_den = a1.den;
14bea432 918
5f63d108 919 return den==0;
14bea432
MN
920}
921
1f018225
MN
922int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd){
923 AVInteger ai;
924 int64_t r=0;
14bea432
MN
925 assert(c > 0);
926 assert(b >=0);
1f018225 927 assert(rnd >=0 && rnd<=5 && rnd!=4);
14bea432 928
15862411 929 if(a<0 && a != INT64_MIN) return -av_rescale_rnd(-a, b, c, rnd ^ ((rnd>>1)&1));
14bea432 930
1f018225
MN
931 if(rnd==AV_ROUND_NEAR_INF) r= c/2;
932 else if(rnd&1) r= c-1;
933
4c263142
MN
934 if(b<=INT_MAX && c<=INT_MAX){
935 if(a<=INT_MAX)
1f018225 936 return (a * b + r)/c;
4c263142 937 else
1f018225 938 return a/c*b + (a%c*b + r)/c;
4c263142 939 }
14bea432 940
4c263142 941 ai= av_mul_i(av_int2i(a), av_int2i(b));
1f018225 942 ai= av_add_i(ai, av_int2i(r));
4c263142 943
1f018225
MN
944 return av_i2int(av_div_i(ai, av_int2i(c)));
945}
946
947int64_t av_rescale(int64_t a, int64_t b, int64_t c){
948 return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF);
14bea432 949}
9b879566 950
c0df9d75
MN
951int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq){
952 int64_t b= bq.num * (int64_t)cq.den;
953 int64_t c= cq.num * (int64_t)bq.den;
954 return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF);
955}
956
caa336b4
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957int64_t ff_gcd(int64_t a, int64_t b){
958 if(b) return ff_gcd(b, a%b);
959 else return a;
960}
961
9b879566
MB
962/* av_log API */
963
9b879566
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964static int av_log_level = AV_LOG_DEBUG;
965
bc874dae 966static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
9b879566 967{
89b9441a 968 static int print_prefix=1;
43465395 969 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
9b879566 970 if(level>av_log_level)
bc874dae 971 return;
d705e4a6 972#undef fprintf
43465395
MN
973 if(print_prefix && avc) {
974 fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
bc874dae 975 }
d705e4a6 976#define fprintf please_use_av_log
89b9441a 977
95ba2c8f 978 print_prefix= strstr(fmt, "\n") != NULL;
89b9441a 979
9b879566
MB
980 vfprintf(stderr, fmt, vl);
981}
982
bc874dae 983static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
9b879566 984
bc874dae 985void av_log(void* avcl, int level, const char *fmt, ...)
9b879566
MB
986{
987 va_list vl;
988 va_start(vl, fmt);
bc874dae 989 av_vlog(avcl, level, fmt, vl);
9b879566
MB
990 va_end(vl);
991}
992
bc874dae 993void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
9b879566 994{
bc874dae 995 av_log_callback(avcl, level, fmt, vl);
9b879566
MB
996}
997
998int av_log_get_level(void)
999{
1000 return av_log_level;
1001}
1002
1003void av_log_set_level(int level)
1004{
1005 av_log_level = level;
1006}
1007
bc874dae 1008void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
9b879566
MB
1009{
1010 av_log_callback = callback;
1011}
1012
2450cff2 1013#if !defined(HAVE_THREADS)
ca8ad847
MN
1014int avcodec_thread_init(AVCodecContext *s, int thread_count){
1015 return -1;
1016}
1017#endif