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1 de6d9b64 Fabrice Bellard
/*
2
 * utils for libavcodec
3 ff4ec49e Fabrice Bellard
 * Copyright (c) 2001 Fabrice Bellard.
4 9b879566 Michel Bardiaux
 * Copyright (c) 2003 Michel Bardiaux for the av_log API
5 8f2ab833 Michael Niedermayer
 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 de6d9b64 Fabrice Bellard
 *
7 ff4ec49e Fabrice Bellard
 * 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.
11 de6d9b64 Fabrice Bellard
 *
12 ff4ec49e Fabrice Bellard
 * This library is distributed in the hope that it will be useful,
13 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ff4ec49e Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16 de6d9b64 Fabrice Bellard
 *
17 ff4ec49e Fabrice Bellard
 * 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
20 de6d9b64 Fabrice Bellard
 */
21 983e3246 Michael Niedermayer
 
22
/**
23
 * @file utils.c
24
 * utils.
25
 */
26
 
27 de6d9b64 Fabrice Bellard
#include "avcodec.h"
28 3123dd79 Fabrice Bellard
#include "dsputil.h"
29 1c2a8c7f Michael Niedermayer
#include "mpegvideo.h"
30 4c263142 Michael Niedermayer
#include "integer.h"
31 9b879566 Michel Bardiaux
#include <stdarg.h>
32 4c263142 Michael Niedermayer
#include <limits.h>
33 de6d9b64 Fabrice Bellard
34 44608ac7 Roine Gustafsson
const uint8_t ff_reverse[256]={
35
0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
36
0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
37
0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
38
0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
39
0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
40
0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
41
0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
42
0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
43
0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
44
0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
45
0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
46
0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
47
0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
48
0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
49
0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
50
0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
51
};
52
53 ddebfb15 Michael Niedermayer
static int volatile entangled_thread_counter=0;
54
55 b100eab8 Michael Niedermayer
void avcodec_default_free_buffers(AVCodecContext *s);
56 eea8c08f Michael Niedermayer
57 18f77016 Zdenek Kabelac
void *av_mallocz(unsigned int size)
58 3123dd79 Fabrice Bellard
{
59
    void *ptr;
60 5b20b732 Michael Niedermayer
    
61 3123dd79 Fabrice Bellard
    ptr = av_malloc(size);
62
    if (!ptr)
63
        return NULL;
64
    memset(ptr, 0, size);
65
    return ptr;
66
}
67
68 8e1e6f31 Fabrice Bellard
char *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
 */
83 5c91a675 Zdenek Kabelac
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
84 8e1e6f31 Fabrice Bellard
{
85
    if(min_size < *size) 
86
        return ptr;
87
    
88 0ecca7a4 Michael Niedermayer
    *size= FFMAX(17*min_size/16 + 32, min_size);
89 8e1e6f31 Fabrice Bellard
90
    return av_realloc(ptr, *size);
91
}
92
93
94 855ea723 Zdenek Kabelac
static unsigned int last_static = 0;
95 8d1f2ba5 Michael Niedermayer
static unsigned int allocated_static = 0;
96
static void** array_static = NULL;
97
98
/**
99
 * allocation of static arrays - do not use for normal allocation.
100
 */
101
void *av_mallocz_static(unsigned int size)
102 855ea723 Zdenek Kabelac
{
103
    void *ptr = av_mallocz(size);
104
105 8d1f2ba5 Michael Niedermayer
    if(ptr){ 
106 4e39ab4c Michael Niedermayer
        array_static =av_fast_realloc(array_static, &allocated_static, sizeof(void*)*(last_static+1));
107 0ecca7a4 Michael Niedermayer
        if(!array_static)
108
            return NULL;
109 8d1f2ba5 Michael Niedermayer
        array_static[last_static++] = ptr;
110 855ea723 Zdenek Kabelac
    }
111 8d1f2ba5 Michael Niedermayer
112 855ea723 Zdenek Kabelac
    return ptr;
113
}
114 8d1f2ba5 Michael Niedermayer
115
/**
116 073c2593 Burkhard Plaum
 * same as above, but does realloc
117
 */
118
119
void *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
/**
136 8d1f2ba5 Michael Niedermayer
 * free all static arrays and reset pointers to 0.
137
 */
138 4cfbf61b Falk Hüffner
void av_free_static(void)
139 855ea723 Zdenek Kabelac
{
140 8d1f2ba5 Michael Niedermayer
    while(last_static){
141
        av_freep(&array_static[--last_static]);
142 855ea723 Zdenek Kabelac
    }
143 8d1f2ba5 Michael Niedermayer
    av_freep(&array_static);
144 855ea723 Zdenek Kabelac
}
145
146 81c5f887 Michael Niedermayer
/**
147
 * Frees memory and sets the pointer to NULL.
148
 * @param arg pointer to the pointer which should be freed
149
 */
150
void av_freep(void *arg)
151 4d7a0a05 Fabrice Bellard
{
152 81c5f887 Michael Niedermayer
    void **ptr= (void**)arg;
153 4d7a0a05 Fabrice Bellard
    av_free(*ptr);
154
    *ptr = NULL;
155
}
156
157 de6d9b64 Fabrice Bellard
/* encoder management */
158 8b69867f Michael Niedermayer
AVCodec *first_avcodec = NULL;
159 de6d9b64 Fabrice Bellard
160
void 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
169 21adafec Michael Niedermayer
void 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
176 d90cf87b Michael Niedermayer
typedef struct InternalBuffer{
177 1e491e29 Michael Niedermayer
    int last_pic_num;
178 d90cf87b Michael Niedermayer
    uint8_t *base[4];
179 1e491e29 Michael Niedermayer
    uint8_t *data[4];
180 237e4938 Michael Niedermayer
    int linesize[4];
181 d90cf87b Michael Niedermayer
}InternalBuffer;
182
183
#define INTERNAL_BUFFER_SIZE 32
184 1e491e29 Michael Niedermayer
185 f0bbfc4a Michael Niedermayer
#define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
186
187
void 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:
194 ebb177dd Todd Kirby
    case PIX_FMT_UYVY422:
195 f0bbfc4a Michael Niedermayer
    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:
205 f02be79d Roman Shaposhnik
    case PIX_FMT_UYVY411:
206 f0bbfc4a Michael Niedermayer
        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
        }
214 d99fbbf4 Roberto Togni
    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
        }
224 f0bbfc4a Michael Niedermayer
        break;
225 c31b8121 Roberto Togni
    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;
231 f0bbfc4a Michael Niedermayer
    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
241 0ecca7a4 Michael Niedermayer
int 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
249 492cd3a9 Michael Niedermayer
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
250 1e491e29 Michael Niedermayer
    int i;
251 f0bbfc4a Michael Niedermayer
    int w= s->width;
252
    int h= s->height;
253 d90cf87b Michael Niedermayer
    InternalBuffer *buf;
254 237e4938 Michael Niedermayer
    int *picture_number;
255 0ecca7a4 Michael Niedermayer
256 4e00e76b Michael Niedermayer
    assert(pic->data[0]==NULL);
257 d90cf87b Michael Niedermayer
    assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
258 1e491e29 Michael Niedermayer
259 0ecca7a4 Michael Niedermayer
    if(avcodec_check_dimensions(s,w,h))
260
        return -1;
261
262 d90cf87b Michael Niedermayer
    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];
274 237e4938 Michael Niedermayer
    picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
275
    (*picture_number)++;
276
    
277 d90cf87b Michael Niedermayer
    if(buf->base[0]){
278 237e4938 Michael Niedermayer
        pic->age= *picture_number - buf->last_pic_num;
279
        buf->last_pic_num= *picture_number;
280 1e491e29 Michael Niedermayer
    }else{
281 f0bbfc4a Michael Niedermayer
        int h_chroma_shift, v_chroma_shift;
282 3237f731 Michael Niedermayer
        int pixel_size;
283 1e491e29 Michael Niedermayer
        
284
        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
285 f0bbfc4a Michael Niedermayer
        
286 1e491e29 Michael Niedermayer
        switch(s->pix_fmt){
287 ba88675b Michael Niedermayer
        case PIX_FMT_RGB555:
288
        case PIX_FMT_RGB565:
289 1e491e29 Michael Niedermayer
        case PIX_FMT_YUV422:
290 ebb177dd Todd Kirby
        case PIX_FMT_UYVY422:
291 1e491e29 Michael Niedermayer
            pixel_size=2;
292
            break;
293
        case PIX_FMT_RGB24:
294
        case PIX_FMT_BGR24:
295
            pixel_size=3;
296
            break;
297
        case PIX_FMT_RGBA32:
298
            pixel_size=4;
299
            break;
300
        default:
301
            pixel_size=1;
302
        }
303 f0bbfc4a Michael Niedermayer
304
        avcodec_align_dimensions(s, &w, &h);
305
            
306 1e491e29 Michael Niedermayer
        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
307
            w+= EDGE_WIDTH*2;
308
            h+= EDGE_WIDTH*2;
309
        }
310
        
311 d90cf87b Michael Niedermayer
        buf->last_pic_num= -256*256*256*64;
312 1e491e29 Michael Niedermayer
313
        for(i=0; i<3; i++){
314 2c19981a Michael Niedermayer
            const int h_shift= i==0 ? 0 : h_chroma_shift;
315
            const int v_shift= i==0 ? 0 : v_chroma_shift;
316 1e491e29 Michael Niedermayer
317 7984082a Michael Niedermayer
            //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
318 3237f731 Michael Niedermayer
            buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, STRIDE_ALIGN<<(h_chroma_shift-h_shift)); 
319 1e491e29 Michael Niedermayer
320 f41c1fac Kurosu
            buf->base[i]= av_malloc((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
321 d90cf87b Michael Niedermayer
            if(buf->base[i]==NULL) return -1;
322 237e4938 Michael Niedermayer
            memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
323 1e491e29 Michael Niedermayer
        
324
            if(s->flags&CODEC_FLAG_EMU_EDGE)
325 d90cf87b Michael Niedermayer
                buf->data[i] = buf->base[i];
326 1e491e29 Michael Niedermayer
            else
327 3237f731 Michael Niedermayer
                buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), STRIDE_ALIGN);
328 1e491e29 Michael Niedermayer
        }
329
        pic->age= 256*256*256*64;
330
    }
331 237e4938 Michael Niedermayer
    pic->type= FF_BUFFER_TYPE_INTERNAL;
332 1e491e29 Michael Niedermayer
333 d90cf87b Michael Niedermayer
    for(i=0; i<4; i++){
334
        pic->base[i]= buf->base[i];
335
        pic->data[i]= buf->data[i];
336 237e4938 Michael Niedermayer
        pic->linesize[i]= buf->linesize[i];
337 d90cf87b Michael Niedermayer
    }
338
    s->internal_buffer_count++;
339
340 1e491e29 Michael Niedermayer
    return 0;
341
}
342
343 492cd3a9 Michael Niedermayer
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
344 1e491e29 Michael Niedermayer
    int i;
345 d90cf87b Michael Niedermayer
    InternalBuffer *buf, *last, temp;
346
347 4e00e76b Michael Niedermayer
    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
348 59c673d5 Michael Niedermayer
    assert(s->internal_buffer_count);
349 d90cf87b Michael Niedermayer
350 b1609412 Fabrice Bellard
    buf = NULL; /* avoids warning */
351 d90cf87b Michael Niedermayer
    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++){
365 1e491e29 Michael Niedermayer
        pic->data[i]=NULL;
366 d90cf87b Michael Niedermayer
//        pic->base[i]=NULL;
367
    }
368 1e491e29 Michael Niedermayer
//printf("R%X\n", pic->opaque);
369
}
370
371 e1c2a5a0 Roberto Togni
int 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
403 9c3d33d6 Michael Niedermayer
int 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
413 494c56d3 Ivan Kalvachev
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
414 a33c7159 Michael Niedermayer
    return fmt[0];
415
}
416
417 43465395 Michael Niedermayer
static 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
426
static AVClass av_codec_context_class = { "AVCodecContext", context_to_name };
427
428 a949d72e Michael Niedermayer
void avcodec_get_context_defaults(AVCodecContext *s){
429 9740beff Michael Niedermayer
    memset(s, 0, sizeof(AVCodecContext));
430
431 43465395 Michael Niedermayer
    s->av_class= &av_codec_context_class;
432 e8b62df6 Michael Niedermayer
    s->bit_rate= 800*1000;
433
    s->bit_rate_tolerance= s->bit_rate*10;
434 a949d72e Michael Niedermayer
    s->qmin= 2;
435
    s->qmax= 31;
436 6e0d8c06 Michael Niedermayer
    s->mb_lmin= FF_QP2LAMBDA * 2;
437
    s->mb_lmax= FF_QP2LAMBDA * 31;
438 a949d72e Michael Niedermayer
    s->rc_eq= "tex^qComp";
439
    s->qcompress= 0.5;
440 e8b62df6 Michael Niedermayer
    s->max_qdiff= 3;
441
    s->b_quant_factor=1.25;
442
    s->b_quant_offset=1.25;
443 b3a391e8 Michael Niedermayer
    s->i_quant_factor=-0.8;
444 e8b62df6 Michael Niedermayer
    s->i_quant_offset=0.0;
445 4d2858de Michael Niedermayer
    s->error_concealment= 3;
446 8d0e42ca Michael Niedermayer
    s->error_resilience= 1;
447 4d2858de Michael Niedermayer
    s->workaround_bugs= FF_BUG_AUTODETECT;
448 c0df9d75 Michael Niedermayer
    s->time_base= (AVRational){0,1};
449 8d0e42ca Michael Niedermayer
    s->gop_size= 50;
450
    s->me_method= ME_EPZS;
451 1e491e29 Michael Niedermayer
    s->get_buffer= avcodec_default_get_buffer;
452
    s->release_buffer= avcodec_default_release_buffer;
453 a33c7159 Michael Niedermayer
    s->get_format= avcodec_default_get_format;
454 9c3d33d6 Michael Niedermayer
    s->execute= avcodec_default_execute;
455
    s->thread_count=1;
456 826f429a Michael Niedermayer
    s->me_subpel_quality=8;
457 158c7f05 Michael Niedermayer
    s->lmin= FF_QP2LAMBDA * s->qmin;
458
    s->lmax= FF_QP2LAMBDA * s->qmax;
459 5ff85f1d Michael Niedermayer
    s->sample_aspect_ratio= (AVRational){0,1};
460 620fe604 Michael Niedermayer
    s->ildct_cmp= FF_CMP_VSAD;
461 baced9f5 Michael Niedermayer
    s->profile= FF_PROFILE_UNKNOWN;
462
    s->level= FF_LEVEL_UNKNOWN;
463 09c3e44e Michael Niedermayer
    s->me_penalty_compensation= 256;
464 644a9262 Michael Niedermayer
    s->pix_fmt= PIX_FMT_NONE;
465 1984f635 Michael Niedermayer
    
466
    s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
467
    s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
468 2a2bbcb0 Mike Melanson
    s->palctrl = NULL;
469 e1c2a5a0 Roberto Togni
    s->reget_buffer= avcodec_default_reget_buffer;
470 a949d72e Michael Niedermayer
}
471
472
/**
473
 * allocates a AVCodecContext and set it to defaults.
474
 * this can be deallocated by simply calling free() 
475
 */
476 7ffbb60e Falk Hüffner
AVCodecContext *avcodec_alloc_context(void){
477 9740beff Michael Niedermayer
    AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
478 a949d72e Michael Niedermayer
    
479
    if(avctx==NULL) return NULL;
480
    
481
    avcodec_get_context_defaults(avctx);
482
    
483
    return avctx;
484
}
485
486 9740beff Michael Niedermayer
void avcodec_get_frame_defaults(AVFrame *pic){
487
    memset(pic, 0, sizeof(AVFrame));
488
489
    pic->pts= AV_NOPTS_VALUE;
490 c342499d Michael Niedermayer
    pic->key_frame= 1;
491 9740beff Michael Niedermayer
}
492
493 1e491e29 Michael Niedermayer
/**
494 492cd3a9 Michael Niedermayer
 * allocates a AVPFrame and set it to defaults.
495 1e491e29 Michael Niedermayer
 * this can be deallocated by simply calling free() 
496
 */
497 492cd3a9 Michael Niedermayer
AVFrame *avcodec_alloc_frame(void){
498 9740beff Michael Niedermayer
    AVFrame *pic= av_malloc(sizeof(AVFrame));
499
    
500
    if(pic==NULL) return NULL;
501
    
502
    avcodec_get_frame_defaults(pic);
503 1e491e29 Michael Niedermayer
    
504
    return pic;
505
}
506
507 de6d9b64 Fabrice Bellard
int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
508
{
509 ddebfb15 Michael Niedermayer
    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
    }
516 de6d9b64 Fabrice Bellard
517 09770af8 Michael Niedermayer
    if(avctx->codec)
518 ddebfb15 Michael Niedermayer
        goto end;
519 09770af8 Michael Niedermayer
520 de6d9b64 Fabrice Bellard
    avctx->codec = codec;
521 4cb3ca72 Zdenek Kabelac
    avctx->codec_id = codec->id;
522 de6d9b64 Fabrice Bellard
    avctx->frame_number = 0;
523 0edf8a7a Philip Gladstone
    if (codec->priv_data_size > 0) {
524
        avctx->priv_data = av_mallocz(codec->priv_data_size);
525
        if (!avctx->priv_data) 
526 ddebfb15 Michael Niedermayer
            goto end;
527 0edf8a7a Philip Gladstone
    } else {
528
        avctx->priv_data = NULL;
529
    }
530 21adafec Michael Niedermayer
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
536 0ecca7a4 Michael Niedermayer
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
537
        av_freep(&avctx->priv_data);
538 ddebfb15 Michael Niedermayer
        goto end;
539 0ecca7a4 Michael Niedermayer
    }
540
541 de6d9b64 Fabrice Bellard
    ret = avctx->codec->init(avctx);
542
    if (ret < 0) {
543 3123dd79 Fabrice Bellard
        av_freep(&avctx->priv_data);
544 ddebfb15 Michael Niedermayer
        goto end;
545 de6d9b64 Fabrice Bellard
    }
546 ddebfb15 Michael Niedermayer
    ret=0;
547
end:
548
    entangled_thread_counter--;
549
    return ret;
550 de6d9b64 Fabrice Bellard
}
551
552 0c1a9eda Zdenek Kabelac
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size, 
553 de6d9b64 Fabrice Bellard
                         const short *samples)
554
{
555 0ecca7a4 Michael Niedermayer
    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
    }
559 6f824977 Michael Niedermayer
    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;
565 de6d9b64 Fabrice Bellard
}
566
567 0c1a9eda Zdenek Kabelac
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size, 
568 492cd3a9 Michael Niedermayer
                         const AVFrame *pict)
569 de6d9b64 Fabrice Bellard
{
570 0ecca7a4 Michael Niedermayer
    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;
576 6f824977 Michael Niedermayer
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
577
        int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
578
        avctx->frame_number++;
579 bb628dae Diego Biurrun
        emms_c(); //needed to avoid an emms_c() call before every return;
580 6bb925f4 Michael Niedermayer
    
581 6f824977 Michael Niedermayer
        return ret;
582
    }else
583
        return 0;
584 de6d9b64 Fabrice Bellard
}
585
586 240c1657 Fabrice Bellard
int 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
595 f138f883 Michael Niedermayer
/** 
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
 */
604 492cd3a9 Michael Niedermayer
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture, 
605 de6d9b64 Fabrice Bellard
                         int *got_picture_ptr,
606 0c1a9eda Zdenek Kabelac
                         uint8_t *buf, int buf_size)
607 de6d9b64 Fabrice Bellard
{
608
    int ret;
609 1e491e29 Michael Niedermayer
    
610 53db1cae Michael Niedermayer
    *got_picture_ptr= 0;
611 0ecca7a4 Michael Niedermayer
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
612
        return -1;
613 934982c4 Michael Niedermayer
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
614
        ret = avctx->codec->decode(avctx, picture, got_picture_ptr, 
615
                                buf, buf_size);
616 6bb925f4 Michael Niedermayer
617 bb628dae Diego Biurrun
        emms_c(); //needed to avoid an emms_c() call before every return;
618 1e491e29 Michael Niedermayer
    
619 934982c4 Michael Niedermayer
        if (*got_picture_ptr)                           
620
            avctx->frame_number++;
621
    }else
622
        ret= 0;
623
624 de6d9b64 Fabrice Bellard
    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. */
631 0c1a9eda Zdenek Kabelac
int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples, 
632 de6d9b64 Fabrice Bellard
                         int *frame_size_ptr,
633 0c1a9eda Zdenek Kabelac
                         uint8_t *buf, int buf_size)
634 de6d9b64 Fabrice Bellard
{
635
    int ret;
636
637 53db1cae Michael Niedermayer
    *frame_size_ptr= 0;
638 fec9ccb7 Michael Niedermayer
    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;
644 de6d9b64 Fabrice Bellard
    return ret;
645
}
646
647 240c1657 Fabrice Bellard
/* 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. */
650
int 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
664 de6d9b64 Fabrice Bellard
int avcodec_close(AVCodecContext *avctx)
665
{
666 ddebfb15 Michael Niedermayer
    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
673 de6d9b64 Fabrice Bellard
    if (avctx->codec->close)
674
        avctx->codec->close(avctx);
675 eea8c08f Michael Niedermayer
    avcodec_default_free_buffers(avctx);
676 3123dd79 Fabrice Bellard
    av_freep(&avctx->priv_data);
677 de6d9b64 Fabrice Bellard
    avctx->codec = NULL;
678 ddebfb15 Michael Niedermayer
    entangled_thread_counter--;
679 de6d9b64 Fabrice Bellard
    return 0;
680
}
681
682
AVCodec *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
694 98f3b098 Arpi
AVCodec *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
706 de6d9b64 Fabrice Bellard
AVCodec *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
718
AVCodec *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
730
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
731
{
732
    const char *codec_name;
733
    AVCodec *p;
734
    char buf1[32];
735 623563c0 Zdenek Kabelac
    char channels_str[100];
736 a96b68b7 Fabrice Bellard
    int bitrate;
737 de6d9b64 Fabrice Bellard
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;
745 98ce5991 Fabrice Bellard
        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
        }
751 985180a1 Fabrice Bellard
    } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
752
        /* fake mpeg2 transport stream codec (currently not
753
           registered) */
754
        codec_name = "mpeg2ts";
755 de6d9b64 Fabrice Bellard
    } 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",
775 7d1c3fc1 Michael Niedermayer
                 codec_name, enc->mb_decision ? " (hq)" : "");
776 82c0c4ba Michael Niedermayer
        if (enc->pix_fmt != PIX_FMT_NONE) {
777 cf087595 Fabrice Bellard
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
778
                     ", %s",
779 9bbffbb1 Fabrice Bellard
                     avcodec_get_pix_fmt_name(enc->pix_fmt));
780 cf087595 Fabrice Bellard
        }
781 de6d9b64 Fabrice Bellard
        if (enc->width) {
782
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
783
                     ", %dx%d, %0.2f fps",
784
                     enc->width, enc->height, 
785 c0df9d75 Michael Niedermayer
                     1/av_q2d(enc->time_base));
786 de6d9b64 Fabrice Bellard
        }
787 4bfad535 Fabrice Bellard
        if (encode) {
788
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
789
                     ", q=%d-%d", enc->qmin, enc->qmax);
790
        }
791 a96b68b7 Fabrice Bellard
        bitrate = enc->bit_rate;
792 de6d9b64 Fabrice Bellard
        break;
793
    case CODEC_TYPE_AUDIO:
794
        snprintf(buf, buf_size,
795
                 "Audio: %s",
796
                 codec_name);
797 e0d2714a Juanjo
        switch (enc->channels) {
798
            case 1:
799 623563c0 Zdenek Kabelac
                strcpy(channels_str, "mono");
800 e0d2714a Juanjo
                break;
801
            case 2:
802 623563c0 Zdenek Kabelac
                strcpy(channels_str, "stereo");
803 e0d2714a Juanjo
                break;
804
            case 6:
805 623563c0 Zdenek Kabelac
                strcpy(channels_str, "5:1");
806 e0d2714a Juanjo
                break;
807
            default:
808 2fc8ea24 Michael Niedermayer
                snprintf(channels_str, sizeof(channels_str), "%d channels", enc->channels);
809 e0d2714a Juanjo
                break;
810
        }
811 de6d9b64 Fabrice Bellard
        if (enc->sample_rate) {
812
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
813
                     ", %d Hz, %s",
814
                     enc->sample_rate,
815 e0d2714a Juanjo
                     channels_str);
816 de6d9b64 Fabrice Bellard
        }
817 e0d2714a Juanjo
        
818 a96b68b7 Fabrice Bellard
        /* 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:
824 a190b7e9 Fabrice Bellard
            bitrate = enc->sample_rate * enc->channels * 16;
825 a96b68b7 Fabrice Bellard
            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:
830 a190b7e9 Fabrice Bellard
            bitrate = enc->sample_rate * enc->channels * 8;
831 a96b68b7 Fabrice Bellard
            break;
832
        default:
833
            bitrate = enc->bit_rate;
834
            break;
835
        }
836 de6d9b64 Fabrice Bellard
        break;
837 985180a1 Fabrice Bellard
    case CODEC_TYPE_DATA:
838
        snprintf(buf, buf_size, "Data: %s", codec_name);
839 240c1657 Fabrice Bellard
        bitrate = enc->bit_rate;
840
        break;
841
    case CODEC_TYPE_SUBTITLE:
842
        snprintf(buf, buf_size, "Subtitle: %s", codec_name);
843 985180a1 Fabrice Bellard
        bitrate = enc->bit_rate;
844
        break;
845 de6d9b64 Fabrice Bellard
    default:
846 9fe5a7b8 Michael Niedermayer
        snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
847
        return;
848 de6d9b64 Fabrice Bellard
    }
849 4bfad535 Fabrice Bellard
    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
    }
857 a96b68b7 Fabrice Bellard
    if (bitrate != 0) {
858 de6d9b64 Fabrice Bellard
        snprintf(buf + strlen(buf), buf_size - strlen(buf), 
859 a96b68b7 Fabrice Bellard
                 ", %d kb/s", bitrate / 1000);
860 de6d9b64 Fabrice Bellard
    }
861
}
862
863 156e5023 Nick Kurshev
unsigned avcodec_version( void )
864
{
865
  return LIBAVCODEC_VERSION_INT;
866
}
867 cf087595 Fabrice Bellard
868 8bceb6af Nick Kurshev
unsigned avcodec_build( void )
869
{
870
  return LIBAVCODEC_BUILD;
871
}
872
873 de6d9b64 Fabrice Bellard
/* must be called before any other functions */
874
void avcodec_init(void)
875
{
876 0344cd0a Alex Beregszaszi
    static int inited = 0;
877
878
    if (inited != 0)
879
        return;
880
    inited = 1;
881
882 59cf08ce Fabrice Bellard
    dsputil_static_init();
883 de6d9b64 Fabrice Bellard
}
884
885 7a06ff14 Michael Niedermayer
/**
886
 * Flush buffers, should be called when seeking or when swicthing to a different stream.
887
 */
888 1c2a8c7f Michael Niedermayer
void avcodec_flush_buffers(AVCodecContext *avctx)
889
{
890 7a06ff14 Michael Niedermayer
    if(avctx->codec->flush)
891
        avctx->codec->flush(avctx);
892 1c2a8c7f Michael Niedermayer
}
893
894 b100eab8 Michael Niedermayer
void avcodec_default_free_buffers(AVCodecContext *s){
895 d90cf87b Michael Niedermayer
    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
911 d8085ea7 Michael Niedermayer
char 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
923 9b879566 Michel Bardiaux
/* av_log API */
924
925 e18c1f19 Michael Niedermayer
static int av_log_level = AV_LOG_INFO;
926 9b879566 Michel Bardiaux
927 bc874dae Michel Bardiaux
static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
928 9b879566 Michel Bardiaux
{
929 89b9441a Michael Niedermayer
    static int print_prefix=1;
930 43465395 Michael Niedermayer
    AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
931 9b879566 Michel Bardiaux
    if(level>av_log_level)
932 bc874dae Michel Bardiaux
        return;
933 d705e4a6 Michael Niedermayer
#undef fprintf
934 43465395 Michael Niedermayer
    if(print_prefix && avc) {
935
            fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
936 bc874dae Michel Bardiaux
    }
937 d705e4a6 Michael Niedermayer
#define fprintf please_use_av_log
938 89b9441a Michael Niedermayer
        
939 95ba2c8f Falk Hüffner
    print_prefix= strstr(fmt, "\n") != NULL;
940 89b9441a Michael Niedermayer
        
941 9b879566 Michel Bardiaux
    vfprintf(stderr, fmt, vl);
942
}
943
944 bc874dae Michel Bardiaux
static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
945 9b879566 Michel Bardiaux
946 bc874dae Michel Bardiaux
void av_log(void* avcl, int level, const char *fmt, ...)
947 9b879566 Michel Bardiaux
{
948
    va_list vl;
949
    va_start(vl, fmt);
950 bc874dae Michel Bardiaux
    av_vlog(avcl, level, fmt, vl);
951 9b879566 Michel Bardiaux
    va_end(vl);
952
}
953
954 bc874dae Michel Bardiaux
void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
955 9b879566 Michel Bardiaux
{
956 bc874dae Michel Bardiaux
    av_log_callback(avcl, level, fmt, vl);
957 9b879566 Michel Bardiaux
}
958
959
int av_log_get_level(void)
960
{
961
    return av_log_level;
962
}
963
964
void av_log_set_level(int level)
965
{
966
    av_log_level = level;
967
}
968
969 bc874dae Michel Bardiaux
void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
970 9b879566 Michel Bardiaux
{
971
    av_log_callback = callback;
972
}
973
974 2450cff2 François Revol
#if !defined(HAVE_THREADS)
975 ca8ad847 Michael Niedermayer
int avcodec_thread_init(AVCodecContext *s, int thread_count){
976
    return -1;
977
}
978
#endif
979 ad2b531d Måns Rullgård
980
unsigned 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
}