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1
/*
2
 * utils for libavcodec
3
 * Copyright (c) 2001 Fabrice Bellard.
4
 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5
 *
6
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
13
 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * Lesser General Public License for more details.
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
19
 * License along with FFmpeg; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22

    
23
/**
24
 * @file utils.c
25
 * utils.
26
 */
27

    
28
#include "avcodec.h"
29
#include "dsputil.h"
30
#include "mpegvideo.h"
31
#include "integer.h"
32
#include "opt.h"
33
#include "crc.h"
34
#include <stdarg.h>
35
#include <limits.h>
36
#include <float.h>
37
#ifdef __MINGW32__
38
#include <fcntl.h>
39
#endif
40

    
41
const uint8_t ff_reverse[256]={
42
0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
43
0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
44
0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
45
0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
46
0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
47
0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
48
0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
49
0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
50
0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
51
0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
52
0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
53
0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
54
0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
55
0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
56
0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
57
0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
58
};
59

    
60
static int volatile entangled_thread_counter=0;
61

    
62
/**
63
 * realloc which does nothing if the block is large enough
64
 */
65
void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
66
{
67
    if(min_size < *size)
68
        return ptr;
69

    
70
    *size= FFMAX(17*min_size/16 + 32, min_size);
71

    
72
    return av_realloc(ptr, *size);
73
}
74

    
75
static unsigned int last_static = 0;
76
static unsigned int allocated_static = 0;
77
static void** array_static = NULL;
78

    
79
/**
80
 * allocation of static arrays - do not use for normal allocation.
81
 */
82
void *av_mallocz_static(unsigned int size)
83
{
84
    void *ptr = av_mallocz(size);
85

    
86
    if(ptr){
87
        array_static =av_fast_realloc(array_static, &allocated_static, sizeof(void*)*(last_static+1));
88
        if(!array_static)
89
            return NULL;
90
        array_static[last_static++] = ptr;
91
    }
92

    
93
    return ptr;
94
}
95

    
96
/**
97
 * same as above, but does realloc
98
 */
99

    
100
void *av_realloc_static(void *ptr, unsigned int size)
101
{
102
    int i;
103
    if(!ptr)
104
      return av_mallocz_static(size);
105
    /* Look for the old ptr */
106
    for(i = 0; i < last_static; i++) {
107
        if(array_static[i] == ptr) {
108
            array_static[i] = av_realloc(array_static[i], size);
109
            return array_static[i];
110
        }
111
    }
112
    return NULL;
113

    
114
}
115

    
116
/**
117
 * free all static arrays and reset pointers to 0.
118
 */
119
void av_free_static(void)
120
{
121
    while(last_static){
122
        av_freep(&array_static[--last_static]);
123
    }
124
    av_freep(&array_static);
125
}
126

    
127
/**
128
 * Call av_free_static automatically before it's too late
129
 */
130

    
131
static void do_free(void) __attribute__ ((destructor));
132

    
133
static void do_free(void)
134
{
135
    av_free_static();
136
}
137

    
138

    
139
/* encoder management */
140
AVCodec *first_avcodec = NULL;
141

    
142
void register_avcodec(AVCodec *format)
143
{
144
    AVCodec **p;
145
    p = &first_avcodec;
146
    while (*p != NULL) p = &(*p)->next;
147
    *p = format;
148
    format->next = NULL;
149
}
150

    
151
void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
152
    s->coded_width = width;
153
    s->coded_height= height;
154
    s->width = -((-width )>>s->lowres);
155
    s->height= -((-height)>>s->lowres);
156
}
157

    
158
typedef struct InternalBuffer{
159
    int last_pic_num;
160
    uint8_t *base[4];
161
    uint8_t *data[4];
162
    int linesize[4];
163
}InternalBuffer;
164

    
165
#define INTERNAL_BUFFER_SIZE 32
166

    
167
#define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
168

    
169
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
170
    int w_align= 1;
171
    int h_align= 1;
172

    
173
    switch(s->pix_fmt){
174
    case PIX_FMT_YUV420P:
175
    case PIX_FMT_YUYV422:
176
    case PIX_FMT_UYVY422:
177
    case PIX_FMT_YUV422P:
178
    case PIX_FMT_YUV444P:
179
    case PIX_FMT_GRAY8:
180
    case PIX_FMT_GRAY16BE:
181
    case PIX_FMT_GRAY16LE:
182
    case PIX_FMT_YUVJ420P:
183
    case PIX_FMT_YUVJ422P:
184
    case PIX_FMT_YUVJ444P:
185
        w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
186
        h_align= 16;
187
        break;
188
    case PIX_FMT_YUV411P:
189
    case PIX_FMT_UYYVYY411:
190
        w_align=32;
191
        h_align=8;
192
        break;
193
    case PIX_FMT_YUV410P:
194
        if(s->codec_id == CODEC_ID_SVQ1){
195
            w_align=64;
196
            h_align=64;
197
        }
198
    case PIX_FMT_RGB555:
199
        if(s->codec_id == CODEC_ID_RPZA){
200
            w_align=4;
201
            h_align=4;
202
        }
203
    case PIX_FMT_PAL8:
204
        if(s->codec_id == CODEC_ID_SMC){
205
            w_align=4;
206
            h_align=4;
207
        }
208
        break;
209
    case PIX_FMT_BGR24:
210
        if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
211
            w_align=4;
212
            h_align=4;
213
        }
214
        break;
215
    default:
216
        w_align= 1;
217
        h_align= 1;
218
        break;
219
    }
220

    
221
    *width = ALIGN(*width , w_align);
222
    *height= ALIGN(*height, h_align);
223
}
224

    
225
int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
226
    if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/4)
227
        return 0;
228

    
229
    av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
230
    return -1;
231
}
232

    
233
int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
234
    int i;
235
    int w= s->width;
236
    int h= s->height;
237
    InternalBuffer *buf;
238
    int *picture_number;
239

    
240
    if(pic->data[0]!=NULL) {
241
        av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
242
        return -1;
243
    }
244
    if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
245
        av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
246
        return -1;
247
    }
248

    
249
    if(avcodec_check_dimensions(s,w,h))
250
        return -1;
251

    
252
    if(s->internal_buffer==NULL){
253
        s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
254
    }
255
#if 0
256
    s->internal_buffer= av_fast_realloc(
257
        s->internal_buffer,
258
        &s->internal_buffer_size,
259
        sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
260
        );
261
#endif
262

    
263
    buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
264
    picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
265
    (*picture_number)++;
266

    
267
    if(buf->base[0]){
268
        pic->age= *picture_number - buf->last_pic_num;
269
        buf->last_pic_num= *picture_number;
270
    }else{
271
        int h_chroma_shift, v_chroma_shift;
272
        int pixel_size, size[3];
273
        AVPicture picture;
274

    
275
        avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
276

    
277
        avcodec_align_dimensions(s, &w, &h);
278

    
279
        if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
280
            w+= EDGE_WIDTH*2;
281
            h+= EDGE_WIDTH*2;
282
        }
283
        avpicture_fill(&picture, NULL, s->pix_fmt, w, h);
284
        pixel_size= picture.linesize[0]*8 / w;
285
//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d\n", (int)picture.data[1], w, h, s->pix_fmt);
286
        assert(pixel_size>=1);
287
            //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
288
        if(pixel_size == 3*8)
289
            w= ALIGN(w, STRIDE_ALIGN<<h_chroma_shift);
290
        else
291
            w= ALIGN(pixel_size*w, STRIDE_ALIGN<<(h_chroma_shift+3)) / pixel_size;
292
        size[1] = avpicture_fill(&picture, NULL, s->pix_fmt, w, h);
293
        size[0] = picture.linesize[0] * h;
294
        size[1] -= size[0];
295
        if(picture.data[2])
296
            size[1]= size[2]= size[1]/2;
297
        else
298
            size[2]= 0;
299

    
300
        buf->last_pic_num= -256*256*256*64;
301
        memset(buf->base, 0, sizeof(buf->base));
302
        memset(buf->data, 0, sizeof(buf->data));
303

    
304
        for(i=0; i<3 && size[i]; i++){
305
            const int h_shift= i==0 ? 0 : h_chroma_shift;
306
            const int v_shift= i==0 ? 0 : v_chroma_shift;
307

    
308
            buf->linesize[i]= picture.linesize[i];
309

    
310
            buf->base[i]= av_malloc(size[i]+16); //FIXME 16
311
            if(buf->base[i]==NULL) return -1;
312
            memset(buf->base[i], 128, size[i]);
313

    
314
            // no edge if EDEG EMU or not planar YUV, we check for PAL8 redundantly to protect against a exploitable bug regression ...
315
            if((s->flags&CODEC_FLAG_EMU_EDGE) || (s->pix_fmt == PIX_FMT_PAL8) || !size[2])
316
                buf->data[i] = buf->base[i];
317
            else
318
                buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), STRIDE_ALIGN);
319
        }
320
        pic->age= 256*256*256*64;
321
    }
322
    pic->type= FF_BUFFER_TYPE_INTERNAL;
323

    
324
    for(i=0; i<4; i++){
325
        pic->base[i]= buf->base[i];
326
        pic->data[i]= buf->data[i];
327
        pic->linesize[i]= buf->linesize[i];
328
    }
329
    s->internal_buffer_count++;
330

    
331
    return 0;
332
}
333

    
334
void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
335
    int i;
336
    InternalBuffer *buf, *last;
337

    
338
    assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
339
    assert(s->internal_buffer_count);
340

    
341
    buf = NULL; /* avoids warning */
342
    for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
343
        buf= &((InternalBuffer*)s->internal_buffer)[i];
344
        if(buf->data[0] == pic->data[0])
345
            break;
346
    }
347
    assert(i < s->internal_buffer_count);
348
    s->internal_buffer_count--;
349
    last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
350

    
351
    FFSWAP(InternalBuffer, *buf, *last);
352

    
353
    for(i=0; i<3; i++){
354
        pic->data[i]=NULL;
355
//        pic->base[i]=NULL;
356
    }
357
//printf("R%X\n", pic->opaque);
358
}
359

    
360
int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
361
    AVFrame temp_pic;
362
    int i;
363

    
364
    /* If no picture return a new buffer */
365
    if(pic->data[0] == NULL) {
366
        /* We will copy from buffer, so must be readable */
367
        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
368
        return s->get_buffer(s, pic);
369
    }
370

    
371
    /* If internal buffer type return the same buffer */
372
    if(pic->type == FF_BUFFER_TYPE_INTERNAL)
373
        return 0;
374

    
375
    /*
376
     * Not internal type and reget_buffer not overridden, emulate cr buffer
377
     */
378
    temp_pic = *pic;
379
    for(i = 0; i < 4; i++)
380
        pic->data[i] = pic->base[i] = NULL;
381
    pic->opaque = NULL;
382
    /* Allocate new frame */
383
    if (s->get_buffer(s, pic))
384
        return -1;
385
    /* Copy image data from old buffer to new buffer */
386
    img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
387
             s->height);
388
    s->release_buffer(s, &temp_pic); // Release old frame
389
    return 0;
390
}
391

    
392
int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
393
    int i;
394

    
395
    for(i=0; i<count; i++){
396
        int r= func(c, arg[i]);
397
        if(ret) ret[i]= r;
398
    }
399
    return 0;
400
}
401

    
402
enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
403
    return fmt[0];
404
}
405

    
406
static const char* context_to_name(void* ptr) {
407
    AVCodecContext *avc= ptr;
408

    
409
    if(avc && avc->codec && avc->codec->name)
410
        return avc->codec->name;
411
    else
412
        return "NULL";
413
}
414

    
415
#define OFFSET(x) offsetof(AVCodecContext,x)
416
#define DEFAULT 0 //should be NAN but it doesnt work as its not a constant in glibc as required by ANSI/ISO C
417
//these names are too long to be readable
418
#define V AV_OPT_FLAG_VIDEO_PARAM
419
#define A AV_OPT_FLAG_AUDIO_PARAM
420
#define S AV_OPT_FLAG_SUBTITLE_PARAM
421
#define E AV_OPT_FLAG_ENCODING_PARAM
422
#define D AV_OPT_FLAG_DECODING_PARAM
423

    
424
#define AV_CODEC_DEFAULT_BITRATE 200*1000
425

    
426
static const AVOption options[]={
427
{"b", "set video bitrate (in bits/s)", OFFSET(bit_rate), FF_OPT_TYPE_INT, AV_CODEC_DEFAULT_BITRATE, INT_MIN, INT_MAX, V|A|E},
428
{"bt", "set video bitrate tolerance (in bits/s)", OFFSET(bit_rate_tolerance), FF_OPT_TYPE_INT, AV_CODEC_DEFAULT_BITRATE*20, 1, INT_MAX, V|E},
429
{"flags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, V|A|E|D, "flags"},
430
{"mv4", "use four motion vector by macroblock (mpeg4)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_4MV, INT_MIN, INT_MAX, V|E, "flags"},
431
{"obmc", "use overlapped block motion compensation (h263+)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_OBMC, INT_MIN, INT_MAX, V|E, "flags"},
432
{"qpel", "use 1/4 pel motion compensation", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QPEL, INT_MIN, INT_MAX, V|E, "flags"},
433
{"loop", "use loop filter", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_LOOP_FILTER, INT_MIN, INT_MAX, V|E, "flags"},
434
{"qscale", "use fixed qscale", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QSCALE, INT_MIN, INT_MAX, 0, "flags"},
435
{"gmc", "use gmc", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GMC, INT_MIN, INT_MAX, V|E, "flags"},
436
{"mv0", "always try a mb with mv=<0,0>", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_MV0, INT_MIN, INT_MAX, V|E, "flags"},
437
{"part", "use data partitioning", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PART, INT_MIN, INT_MAX, V|E, "flags"},
438
{"input_preserved", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INPUT_PRESERVED, INT_MIN, INT_MAX, 0, "flags"},
439
{"pass1", "use internal 2pass ratecontrol in first  pass mode", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PASS1, INT_MIN, INT_MAX, 0, "flags"},
440
{"pass2", "use internal 2pass ratecontrol in second pass mode", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PASS2, INT_MIN, INT_MAX, 0, "flags"},
441
{"extern_huff", "use external huffman table (for mjpeg)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_EXTERN_HUFF, INT_MIN, INT_MAX, 0, "flags"},
442
{"gray", "only decode/encode grayscale", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GRAY, INT_MIN, INT_MAX, V|E|D, "flags"},
443
{"emu_edge", "don't draw edges", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_EMU_EDGE, INT_MIN, INT_MAX, 0, "flags"},
444
{"psnr", "error[?] variables will be set during encoding", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PSNR, INT_MIN, INT_MAX, V|E, "flags"},
445
{"truncated", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_TRUNCATED, INT_MIN, INT_MAX, 0, "flags"},
446
{"naq", "normalize adaptive quantization", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_NORMALIZE_AQP, INT_MIN, INT_MAX, V|E, "flags"},
447
{"ildct", "use interlaced dct", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INTERLACED_DCT, INT_MIN, INT_MAX, V|E, "flags"},
448
{"low_delay", "force low delay", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_LOW_DELAY, INT_MIN, INT_MAX, V|D|E, "flags"},
449
{"alt", "enable alternate scantable (mpeg2/mpeg4)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_ALT_SCAN, INT_MIN, INT_MAX, V|E, "flags"},
450
{"trell", "use trellis quantization", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_TRELLIS_QUANT, INT_MIN, INT_MAX, V|E, "flags"},
451
{"global_header", "place global headers in extradata instead of every keyframe", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GLOBAL_HEADER, INT_MIN, INT_MAX, 0, "flags"},
452
{"bitexact", "use only bitexact stuff (except (i)dct)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_BITEXACT, INT_MIN, INT_MAX, A|V|S|D|E, "flags"},
453
{"aic", "h263 advanced intra coding / mpeg4 ac prediction", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_AC_PRED, INT_MIN, INT_MAX, V|E, "flags"},
454
{"umv", "use unlimited motion vectors", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_UMV, INT_MIN, INT_MAX, V|E, "flags"},
455
{"cbp", "use rate distortion optimization for cbp", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_CBP_RD, INT_MIN, INT_MAX, V|E, "flags"},
456
{"qprd", "use rate distortion optimization for qp selection", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QP_RD, INT_MIN, INT_MAX, V|E, "flags"},
457
{"aiv", "h263 alternative inter vlc", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_AIV, INT_MIN, INT_MAX, V|E, "flags"},
458
{"slice", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_SLICE_STRUCT, INT_MIN, INT_MAX, V|E, "flags"},
459
{"ilme", "interlaced motion estimation", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INTERLACED_ME, INT_MIN, INT_MAX, V|E, "flags"},
460
{"scan_offset", "will reserve space for svcd scan offset user data", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_SVCD_SCAN_OFFSET, INT_MIN, INT_MAX, V|E, "flags"},
461
{"cgop", "closed gop", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_CLOSED_GOP, INT_MIN, INT_MAX, V|E, "flags"},
462
{"fast", "allow non spec compliant speedup tricks", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_FAST, INT_MIN, INT_MAX, V|E, "flags2"},
463
{"sgop", "strictly enforce gop size", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_STRICT_GOP, INT_MIN, INT_MAX, V|E, "flags2"},
464
{"noout", "skip bitstream encoding", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_NO_OUTPUT, INT_MIN, INT_MAX, V|E, "flags2"},
465
{"local_header", "place global headers at every keyframe instead of in extradata", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_LOCAL_HEADER, INT_MIN, INT_MAX, V|E, "flags2"},
466
{"sub_id", NULL, OFFSET(sub_id), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
467
{"me_method", "set motion estimation method", OFFSET(me_method), FF_OPT_TYPE_INT, ME_EPZS, INT_MIN, INT_MAX, V|E, "me_method"},
468
{"extradata_size", NULL, OFFSET(extradata_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
469
{"time_base", NULL, OFFSET(time_base), FF_OPT_TYPE_RATIONAL, DEFAULT, INT_MIN, INT_MAX},
470
{"g", "set the group of picture size", OFFSET(gop_size), FF_OPT_TYPE_INT, 12, INT_MIN, INT_MAX, V|E},
471
{"rate_emu", "frame rate emulation", OFFSET(rate_emu), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
472
{"ar", "set audio sampling rate (in Hz)", OFFSET(sample_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
473
{"ac", "set number of audio channels", OFFSET(channels), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
474
{"cutoff", "set cutoff bandwidth", OFFSET(cutoff), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|E},
475
{"frame_size", NULL, OFFSET(frame_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|E},
476
{"frame_number", NULL, OFFSET(frame_number), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
477
{"real_pict_num", NULL, OFFSET(real_pict_num), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
478
{"delay", NULL, OFFSET(delay), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
479
{"qcomp", "video quantizer scale compression (VBR)", OFFSET(qcompress), FF_OPT_TYPE_FLOAT, 0.5, FLT_MIN, FLT_MAX, V|E},
480
{"qblur", "video quantizer scale blur (VBR)", OFFSET(qblur), FF_OPT_TYPE_FLOAT, 0.5, FLT_MIN, FLT_MAX, V|E},
481
{"qmin", "min video quantizer scale (VBR)", OFFSET(qmin), FF_OPT_TYPE_INT, 2, 1, 51, V|E},
482
{"qmax", "max video quantizer scale (VBR)", OFFSET(qmax), FF_OPT_TYPE_INT, 31, 1, 51, V|E},
483
{"qdiff", "max difference between the quantizer scale (VBR)", OFFSET(max_qdiff), FF_OPT_TYPE_INT, 3, INT_MIN, INT_MAX, V|E},
484
{"bf", "use 'frames' B frames", OFFSET(max_b_frames), FF_OPT_TYPE_INT, DEFAULT, 0, FF_MAX_B_FRAMES, V|E},
485
{"b_qfactor", "qp factor between p and b frames", OFFSET(b_quant_factor), FF_OPT_TYPE_FLOAT, 1.25, FLT_MIN, FLT_MAX, V|E},
486
{"rc_strategy", "ratecontrol method", OFFSET(rc_strategy), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
487
{"b_strategy", "strategy to choose between I/P/B-frames", OFFSET(b_frame_strategy), FF_OPT_TYPE_INT, 0, INT_MIN, INT_MAX, V|E},
488
{"hurry_up", NULL, OFFSET(hurry_up), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D},
489
{"rtp_mode", NULL, OFFSET(rtp_mode), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
490
{"rtp_payload_size", NULL, OFFSET(rtp_payload_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
491
{"mv_bits", NULL, OFFSET(mv_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
492
{"header_bits", NULL, OFFSET(header_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
493
{"i_tex_bits", NULL, OFFSET(i_tex_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
494
{"p_tex_bits", NULL, OFFSET(p_tex_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
495
{"i_count", NULL, OFFSET(i_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
496
{"p_count", NULL, OFFSET(p_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
497
{"skip_count", NULL, OFFSET(skip_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
498
{"misc_bits", NULL, OFFSET(misc_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
499
{"frame_bits", NULL, OFFSET(frame_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
500
{"codec_tag", NULL, OFFSET(codec_tag), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
501
{"bug", "workaround not auto detected encoder bugs", OFFSET(workaround_bugs), FF_OPT_TYPE_FLAGS, FF_BUG_AUTODETECT, INT_MIN, INT_MAX, V|D, "bug"},
502
{"autodetect", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AUTODETECT, INT_MIN, INT_MAX, V|D, "bug"},
503
{"old_msmpeg4", "some old lavc generated msmpeg4v3 files (no autodetection)", 0, FF_OPT_TYPE_CONST, FF_BUG_OLD_MSMPEG4, INT_MIN, INT_MAX, V|D, "bug"},
504
{"xvid_ilace", "Xvid interlacing bug (autodetected if fourcc==XVIX)", 0, FF_OPT_TYPE_CONST, FF_BUG_XVID_ILACE, INT_MIN, INT_MAX, V|D, "bug"},
505
{"ump4", "(autodetected if fourcc==UMP4)", 0, FF_OPT_TYPE_CONST, FF_BUG_UMP4, INT_MIN, INT_MAX, V|D, "bug"},
506
{"no_padding", "padding bug (autodetected)", 0, FF_OPT_TYPE_CONST, FF_BUG_NO_PADDING, INT_MIN, INT_MAX, V|D, "bug"},
507
{"amv", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AMV, INT_MIN, INT_MAX, V|D, "bug"},
508
{"ac_vlc", "illegal vlc bug (autodetected per fourcc)", 0, FF_OPT_TYPE_CONST, FF_BUG_AC_VLC, INT_MIN, INT_MAX, V|D, "bug"},
509
{"qpel_chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_QPEL_CHROMA, INT_MIN, INT_MAX, V|D, "bug"},
510
{"std_qpel", "old standard qpel (autodetected per fourcc/version)", 0, FF_OPT_TYPE_CONST, FF_BUG_STD_QPEL, INT_MIN, INT_MAX, V|D, "bug"},
511
{"qpel_chroma2", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_QPEL_CHROMA2, INT_MIN, INT_MAX, V|D, "bug"},
512
{"direct_blocksize", "direct-qpel-blocksize bug (autodetected per fourcc/version)", 0, FF_OPT_TYPE_CONST, FF_BUG_DIRECT_BLOCKSIZE, INT_MIN, INT_MAX, V|D, "bug"},
513
{"edge", "edge padding bug (autodetected per fourcc/version)", 0, FF_OPT_TYPE_CONST, FF_BUG_EDGE, INT_MIN, INT_MAX, V|D, "bug"},
514
{"hpel_chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_HPEL_CHROMA, INT_MIN, INT_MAX, V|D, "bug"},
515
{"dc_clip", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_DC_CLIP, INT_MIN, INT_MAX, V|D, "bug"},
516
{"ms", "workaround various bugs in microsofts broken decoders", 0, FF_OPT_TYPE_CONST, FF_BUG_MS, INT_MIN, INT_MAX, V|D, "bug"},
517
{"lelim", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)", OFFSET(luma_elim_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
518
{"celim", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)", OFFSET(chroma_elim_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
519
{"strict", "how strictly to follow the standards", OFFSET(strict_std_compliance), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|V|D, "strict"},
520
{"very", "strictly conform to a older more strict version of the spec or reference software", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_VERY_STRICT, INT_MIN, INT_MAX, V|E, "strict"},
521
{"strict", "strictly conform to all the things in the spec no matter what consequences", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_STRICT, INT_MIN, INT_MAX, V|E, "strict"},
522
{"normal", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_NORMAL, INT_MIN, INT_MAX, V|E, "strict"},
523
{"inofficial", "allow inofficial extensions", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_INOFFICIAL, INT_MIN, INT_MAX, V|E, "strict"},
524
{"experimental", "allow non standarized experimental things", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_EXPERIMENTAL, INT_MIN, INT_MAX, V|E, "strict"},
525
{"b_qoffset", "qp offset between p and b frames", OFFSET(b_quant_offset), FF_OPT_TYPE_FLOAT, 1.25, FLT_MIN, FLT_MAX, V|E},
526
{"er", "set error resilience strategy", OFFSET(error_resilience), FF_OPT_TYPE_INT, FF_ER_CAREFUL, INT_MIN, INT_MAX, A|V|D, "er"},
527
{"careful", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_CAREFUL, INT_MIN, INT_MAX, V|D, "er"},
528
{"compliant", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_COMPLIANT, INT_MIN, INT_MAX, V|D, "er"},
529
{"aggressive", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_AGGRESSIVE, INT_MIN, INT_MAX, V|D, "er"},
530
{"very_aggressive", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_VERY_AGGRESSIVE, INT_MIN, INT_MAX, V|D, "er"},
531
{"has_b_frames", NULL, OFFSET(has_b_frames), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
532
{"block_align", NULL, OFFSET(block_align), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
533
{"parse_only", NULL, OFFSET(parse_only), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
534
{"mpeg_quant", "use MPEG quantizers instead of H.263", OFFSET(mpeg_quant), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
535
{"stats_out", NULL, OFFSET(stats_out), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX},
536
{"stats_in", NULL, OFFSET(stats_in), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX},
537
{"qsquish", "how to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable function)", OFFSET(rc_qsquish), FF_OPT_TYPE_FLOAT, DEFAULT, 0, 99, V|E},
538
{"rc_qmod_amp", "experimental quantizer modulation", OFFSET(rc_qmod_amp), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},
539
{"rc_qmod_freq", "experimental quantizer modulation", OFFSET(rc_qmod_freq), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
540
{"rc_override_count", NULL, OFFSET(rc_override_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
541
{"rc_eq", "set rate control equation", OFFSET(rc_eq), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX, V|E},
542
{"maxrate", "set max video bitrate tolerance (in bits/s)", OFFSET(rc_max_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
543
{"minrate", "set min video bitrate tolerance (in bits/s)", OFFSET(rc_min_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
544
{"bufsize", "set ratecontrol buffer size (in bits)", OFFSET(rc_buffer_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
545
{"rc_buf_aggressivity", "currently useless", OFFSET(rc_buffer_aggressivity), FF_OPT_TYPE_FLOAT, 1.0, FLT_MIN, FLT_MAX, V|E},
546
{"i_qfactor", "qp factor between p and i frames", OFFSET(i_quant_factor), FF_OPT_TYPE_FLOAT, -0.8, -FLT_MAX, FLT_MAX, V|E},
547
{"i_qoffset", "qp offset between p and i frames", OFFSET(i_quant_offset), FF_OPT_TYPE_FLOAT, 0.0, -FLT_MAX, FLT_MAX, V|E},
548
{"rc_init_cplx", "initial complexity for 1-pass encoding", OFFSET(rc_initial_cplx), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},
549
{"dct", "DCT algorithm", OFFSET(dct_algo), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|E, "dct"},
550
{"auto", "autoselect a good one (default)", 0, FF_OPT_TYPE_CONST, FF_DCT_AUTO, INT_MIN, INT_MAX, V|E, "dct"},
551
{"fastint", "fast integer", 0, FF_OPT_TYPE_CONST, FF_DCT_FASTINT, INT_MIN, INT_MAX, V|E, "dct"},
552
{"int", "accurate integer", 0, FF_OPT_TYPE_CONST, FF_DCT_INT, INT_MIN, INT_MAX, V|E, "dct"},
553
{"mmx", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_MMX, INT_MIN, INT_MAX, V|E, "dct"},
554
{"mlib", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_MLIB, INT_MIN, INT_MAX, V|E, "dct"},
555
{"altivec", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_ALTIVEC, INT_MIN, INT_MAX, V|E, "dct"},
556
{"faan", "floating point AAN DCT", 0, FF_OPT_TYPE_CONST, FF_DCT_FAAN, INT_MIN, INT_MAX, V|E, "dct"},
557
{"lumi_mask", "compresses bright areas stronger than medium ones", OFFSET(lumi_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
558
{"tcplx_mask", "temporal complexity masking", OFFSET(temporal_cplx_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
559
{"scplx_mask", "spatial complexity masking", OFFSET(spatial_cplx_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
560
{"p_mask", "inter masking", OFFSET(p_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
561
{"dark_mask", "compresses dark areas stronger than medium ones", OFFSET(dark_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
562
{"unused", NULL, OFFSET(unused), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
563
{"idct", "select IDCT implementation", OFFSET(idct_algo), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|E|D, "idct"},
564
{"auto", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_AUTO, INT_MIN, INT_MAX, V|E|D, "idct"},
565
{"int", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_INT, INT_MIN, INT_MAX, V|E|D, "idct"},
566
{"simple", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLE, INT_MIN, INT_MAX, V|E|D, "idct"},
567
{"simplemmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEMMX, INT_MIN, INT_MAX, V|E|D, "idct"},
568
{"libmpeg2mmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_LIBMPEG2MMX, INT_MIN, INT_MAX, V|E|D, "idct"},
569
{"ps2", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_PS2, INT_MIN, INT_MAX, V|E|D, "idct"},
570
{"mlib", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_MLIB, INT_MIN, INT_MAX, V|E|D, "idct"},
571
{"arm", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_ARM, INT_MIN, INT_MAX, V|E|D, "idct"},
572
{"altivec", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_ALTIVEC, INT_MIN, INT_MAX, V|E|D, "idct"},
573
{"sh4", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SH4, INT_MIN, INT_MAX, V|E|D, "idct"},
574
{"simplearm", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEARM, INT_MIN, INT_MAX, V|E|D, "idct"},
575
{"simplearmv5te", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEARMV5TE, INT_MIN, INT_MAX, V|E|D, "idct"},
576
{"h264", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_H264, INT_MIN, INT_MAX, V|E|D, "idct"},
577
{"vp3", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_VP3, INT_MIN, INT_MAX, V|E|D, "idct"},
578
{"ipp", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_IPP, INT_MIN, INT_MAX, V|E|D, "idct"},
579
{"xvidmmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_XVIDMMX, INT_MIN, INT_MAX, V|E|D, "idct"},
580
{"slice_count", NULL, OFFSET(slice_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
581
{"ec", "set error concealment strategy", OFFSET(error_concealment), FF_OPT_TYPE_FLAGS, 3, INT_MIN, INT_MAX, V|D, "ec"},
582
{"guess_mvs", "iterative motion vector (MV) search (slow)", 0, FF_OPT_TYPE_CONST, FF_EC_GUESS_MVS, INT_MIN, INT_MAX, V|D, "ec"},
583
{"deblock", "use strong deblock filter for damaged MBs", 0, FF_OPT_TYPE_CONST, FF_EC_DEBLOCK, INT_MIN, INT_MAX, V|D, "ec"},
584
{"bits_per_sample", NULL, OFFSET(bits_per_sample), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
585
{"pred", "prediction method", OFFSET(prediction_method), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "pred"},
586
{"left", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_LEFT, INT_MIN, INT_MAX, V|E, "pred"},
587
{"plane", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_PLANE, INT_MIN, INT_MAX, V|E, "pred"},
588
{"median", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_MEDIAN, INT_MIN, INT_MAX, V|E, "pred"},
589
{"aspect", "sample aspect ratio", OFFSET(sample_aspect_ratio), FF_OPT_TYPE_RATIONAL, DEFAULT, 0, 10, V|E},
590
{"debug", "print specific debug info", OFFSET(debug), FF_OPT_TYPE_FLAGS, DEFAULT, 0, INT_MAX, V|A|S|E|D, "debug"},
591
{"pict", "picture info", 0, FF_OPT_TYPE_CONST, FF_DEBUG_PICT_INFO, INT_MIN, INT_MAX, V|D, "debug"},
592
{"rc", "rate control", 0, FF_OPT_TYPE_CONST, FF_DEBUG_RC, INT_MIN, INT_MAX, V|E, "debug"},
593
{"bitstream", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_BITSTREAM, INT_MIN, INT_MAX, V|D, "debug"},
594
{"mb_type", "macroblock (MB) type", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},
595
{"qp", "per-block quantization parameter (QP)", 0, FF_OPT_TYPE_CONST, FF_DEBUG_QP, INT_MIN, INT_MAX, V|D, "debug"},
596
{"mv", "motion vector", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MV, INT_MIN, INT_MAX, V|D, "debug"},
597
{"dct_coeff", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_DCT_COEFF, INT_MIN, INT_MAX, V|D, "debug"},
598
{"skip", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_SKIP, INT_MIN, INT_MAX, V|D, "debug"},
599
{"startcode", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_STARTCODE, INT_MIN, INT_MAX, V|D, "debug"},
600
{"pts", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_PTS, INT_MIN, INT_MAX, V|D, "debug"},
601
{"er", "error resilience", 0, FF_OPT_TYPE_CONST, FF_DEBUG_ER, INT_MIN, INT_MAX, V|D, "debug"},
602
{"mmco", "memory management control operations (H.264)", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MMCO, INT_MIN, INT_MAX, V|D, "debug"},
603
{"bugs", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_BUGS, INT_MIN, INT_MAX, V|D, "debug"},
604
{"vis_qp", "visualize quantization parameter (QP), lower QP are tinted greener", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_QP, INT_MIN, INT_MAX, V|D, "debug"},
605
{"vis_mb_type", "visualize block types", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},
606
{"vismv", "visualize motion vectors (MVs)", OFFSET(debug_mv), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|D, "debug_mv"},
607
{"pf", "forward predicted MVs of P-frames", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_P_FOR, INT_MIN, INT_MAX, V|D, "debug_mv"},
608
{"bf", "forward predicted MVs of B-frames", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_B_FOR, INT_MIN, INT_MAX, V|D, "debug_mv"},
609
{"bb", "backward predicted MVs of B-frames", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_B_BACK, INT_MIN, INT_MAX, V|D, "debug_mv"},
610
{"mb_qmin", "obsolete, use qmin", OFFSET(mb_qmin), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
611
{"mb_qmax", "obsolete, use qmax", OFFSET(mb_qmax), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
612
{"cmp", "full pel me compare function", OFFSET(me_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
613
{"subcmp", "sub pel me compare function", OFFSET(me_sub_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
614
{"mbcmp", "macroblock compare function", OFFSET(mb_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
615
{"ildctcmp", "interlaced dct compare function", OFFSET(ildct_cmp), FF_OPT_TYPE_INT, FF_CMP_VSAD, INT_MIN, INT_MAX, V|E, "cmp_func"},
616
{"dia_size", "diamond type & size for motion estimation", OFFSET(dia_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
617
{"last_pred", "amount of motion predictors from the previous frame", OFFSET(last_predictor_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
618
{"preme", "pre motion estimation", OFFSET(pre_me), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
619
{"precmp", "pre motion estimation compare function", OFFSET(me_pre_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
620
{"sad", "sum of absolute differences, fast (default)", 0, FF_OPT_TYPE_CONST, FF_CMP_SAD, INT_MIN, INT_MAX, V|E, "cmp_func"},
621
{"sse", "sum of squared errors", 0, FF_OPT_TYPE_CONST, FF_CMP_SSE, INT_MIN, INT_MAX, V|E, "cmp_func"},
622
{"satd", "sum of absolute Hadamard transformed differences", 0, FF_OPT_TYPE_CONST, FF_CMP_SATD, INT_MIN, INT_MAX, V|E, "cmp_func"},
623
{"dct", "sum of absolute DCT transformed differences", 0, FF_OPT_TYPE_CONST, FF_CMP_DCT, INT_MIN, INT_MAX, V|E, "cmp_func"},
624
{"psnr", "sum of squared quantization errors (avoid, low quality)", 0, FF_OPT_TYPE_CONST, FF_CMP_PSNR, INT_MIN, INT_MAX, V|E, "cmp_func"},
625
{"bit", "number of bits needed for the block", 0, FF_OPT_TYPE_CONST, FF_CMP_BIT, INT_MIN, INT_MAX, V|E, "cmp_func"},
626
{"rd", "rate distortion optimal, slow", 0, FF_OPT_TYPE_CONST, FF_CMP_RD, INT_MIN, INT_MAX, V|E, "cmp_func"},
627
{"zero", "0", 0, FF_OPT_TYPE_CONST, FF_CMP_ZERO, INT_MIN, INT_MAX, V|E, "cmp_func"},
628
{"vsad", "sum of absolute vertical differences", 0, FF_OPT_TYPE_CONST, FF_CMP_VSAD, INT_MIN, INT_MAX, V|E, "cmp_func"},
629
{"vsse","sum of squared vertical differences", 0, FF_OPT_TYPE_CONST, FF_CMP_VSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},
630
{"nsse", "noise preserving sum of squared differences", 0, FF_OPT_TYPE_CONST, FF_CMP_NSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},
631
#ifdef CONFIG_SNOW_ENCODER
632
{"w53", "5/3 wavelet, only used in snow", 0, FF_OPT_TYPE_CONST, FF_CMP_W53, INT_MIN, INT_MAX, V|E, "cmp_func"},
633
{"w97", "9/7 wavelet, only used in snow", 0, FF_OPT_TYPE_CONST, FF_CMP_W97, INT_MIN, INT_MAX, V|E, "cmp_func"},
634
#endif
635
{"dctmax", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_DCTMAX, INT_MIN, INT_MAX, V|E, "cmp_func"},
636
{"chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_CHROMA, INT_MIN, INT_MAX, V|E, "cmp_func"},
637
{"pre_dia_size", "diamond type & size for motion estimation pre-pass", OFFSET(pre_dia_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
638
{"subq", "sub pel motion estimation quality", OFFSET(me_subpel_quality), FF_OPT_TYPE_INT, 8, INT_MIN, INT_MAX, V|E},
639
{"dtg_active_format", NULL, OFFSET(dtg_active_format), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
640
{"me_range", "limit motion vectors range (1023 for DivX player)", OFFSET(me_range), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
641
{"ibias", "intra quant bias", OFFSET(intra_quant_bias), FF_OPT_TYPE_INT, FF_DEFAULT_QUANT_BIAS, INT_MIN, INT_MAX, V|E},
642
{"pbias", "inter quant bias", OFFSET(inter_quant_bias), FF_OPT_TYPE_INT, FF_DEFAULT_QUANT_BIAS, INT_MIN, INT_MAX, V|E},
643
{"color_table_id", NULL, OFFSET(color_table_id), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
644
{"internal_buffer_count", NULL, OFFSET(internal_buffer_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
645
{"global_quality", NULL, OFFSET(global_quality), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
646
{"coder", NULL, OFFSET(coder_type), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "coder"},
647
{"vlc", "variable length coder / huffman coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_VLC, INT_MIN, INT_MAX, V|E, "coder"},
648
{"ac", "arithmetic coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_AC, INT_MIN, INT_MAX, V|E, "coder"},
649
{"context", "context model", OFFSET(context_model), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
650
{"slice_flags", NULL, OFFSET(slice_flags), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
651
{"xvmc_acceleration", NULL, OFFSET(xvmc_acceleration), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
652
{"mbd", "macroblock decision algorithm (high quality mode)", OFFSET(mb_decision), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "mbd"},
653
{"simple", "use mbcmp (default)", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_SIMPLE, INT_MIN, INT_MAX, V|E, "mbd"},
654
{"bits", "use fewest bits", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_BITS, INT_MIN, INT_MAX, V|E, "mbd"},
655
{"rd", "use best rate distortion", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_RD, INT_MIN, INT_MAX, V|E, "mbd"},
656
{"stream_codec_tag", NULL, OFFSET(stream_codec_tag), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
657
{"sc_threshold", "scene change threshold", OFFSET(scenechange_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
658
{"lmin", "min lagrange factor (VBR)", OFFSET(lmin), FF_OPT_TYPE_INT,  2*FF_QP2LAMBDA, 0, INT_MAX, V|E},
659
{"lmax", "max lagrange factor (VBR)", OFFSET(lmax), FF_OPT_TYPE_INT, 31*FF_QP2LAMBDA, 0, INT_MAX, V|E},
660
{"nr", "noise reduction", OFFSET(noise_reduction), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
661
{"rc_init_occupancy", "number of bits which should be loaded into the rc buffer before decoding starts", OFFSET(rc_initial_buffer_occupancy), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
662
{"inter_threshold", NULL, OFFSET(inter_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
663
{"flags2", NULL, OFFSET(flags2), FF_OPT_TYPE_FLAGS, CODEC_FLAG2_FASTPSKIP, INT_MIN, INT_MAX, V|A|E|D, "flags2"},
664
{"error", NULL, OFFSET(error_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
665
{"antialias", "MP3 antialias algorithm", OFFSET(antialias_algo), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D, "aa"},
666
{"auto", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_AUTO, INT_MIN, INT_MAX, V|D, "aa"},
667
{"fastint", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_FASTINT, INT_MIN, INT_MAX, V|D, "aa"},
668
{"int", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_INT, INT_MIN, INT_MAX, V|D, "aa"},
669
{"float", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_FLOAT, INT_MIN, INT_MAX, V|D, "aa"},
670
{"qns", "quantizer noise shaping", OFFSET(quantizer_noise_shaping), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
671
{"threads", NULL, OFFSET(thread_count), FF_OPT_TYPE_INT, 1, INT_MIN, INT_MAX, V|E|D},
672
{"me_threshold", "motion estimaton threshold", OFFSET(me_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
673
{"mb_threshold", "macroblock threshold", OFFSET(mb_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
674
{"dc", "intra_dc_precision", OFFSET(intra_dc_precision), FF_OPT_TYPE_INT, 0, INT_MIN, INT_MAX, V|E},
675
{"nssew", "nsse weight", OFFSET(nsse_weight), FF_OPT_TYPE_INT, 8, INT_MIN, INT_MAX, V|E},
676
{"skip_top", "number of macroblock rows at the top which are skipped", OFFSET(skip_top), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D},
677
{"skip_bottom", "number of macroblock rows at the bottom which are skipped", OFFSET(skip_bottom), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D},
678
{"profile", NULL, OFFSET(profile), FF_OPT_TYPE_INT, FF_PROFILE_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "profile"},
679
{"unknown", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "profile"},
680
{"level", NULL, OFFSET(level), FF_OPT_TYPE_INT, FF_LEVEL_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "level"},
681
{"unknown", NULL, 0, FF_OPT_TYPE_CONST, FF_LEVEL_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "level"},
682
{"lowres", "decode at 1= 1/2, 2=1/4, 3=1/8 resolutions", OFFSET(lowres), FF_OPT_TYPE_INT, 0, 0, INT_MAX, V|D},
683
{"skip_threshold", "frame skip threshold", OFFSET(frame_skip_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
684
{"skip_factor", "frame skip factor", OFFSET(frame_skip_factor), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
685
{"skip_exp", "frame skip exponent", OFFSET(frame_skip_exp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
686
{"skipcmp", "frame skip compare function", OFFSET(frame_skip_cmp), FF_OPT_TYPE_INT, FF_CMP_DCTMAX, INT_MIN, INT_MAX, V|E, "cmp_func"},
687
{"border_mask", "increases the quantizer for macroblocks close to borders", OFFSET(border_masking), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},
688
{"mblmin", "min macroblock lagrange factor (VBR)", OFFSET(mb_lmin), FF_OPT_TYPE_INT, FF_QP2LAMBDA * 2, 1, FF_LAMBDA_MAX, V|E},
689
{"mblmax", "max macroblock lagrange factor (VBR)", OFFSET(mb_lmax), FF_OPT_TYPE_INT, FF_QP2LAMBDA * 31, 1, FF_LAMBDA_MAX, V|E},
690
{"mepc", "motion estimation bitrate penalty compensation (1.0 = 256)", OFFSET(me_penalty_compensation), FF_OPT_TYPE_INT, 256, INT_MIN, INT_MAX, V|E},
691
{"bidir_refine", "refine the two motion vectors used in bidirectional macroblocks", OFFSET(bidir_refine), FF_OPT_TYPE_INT, DEFAULT, 0, 4, V|E},
692
{"brd_scale", "downscales frames for dynamic B-frame decision", OFFSET(brd_scale), FF_OPT_TYPE_INT, DEFAULT, 0, 10, V|E},
693
{"crf", "enables constant quality mode, and selects the quality (x264)", OFFSET(crf), FF_OPT_TYPE_FLOAT, DEFAULT, 0, 51, V|E},
694
{"cqp", "constant quantization parameter rate control method", OFFSET(cqp), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, V|E},
695
{"keyint_min", "minimum interval between IDR-frames (x264)", OFFSET(keyint_min), FF_OPT_TYPE_INT, 25, INT_MIN, INT_MAX, V|E},
696
{"refs", "reference frames to consider for motion compensation (Snow)", OFFSET(refs), FF_OPT_TYPE_INT, 1, INT_MIN, INT_MAX, V|E},
697
{"chromaoffset", "chroma qp offset from luma", OFFSET(chromaoffset), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
698
{"bframebias", "influences how often B-frames are used", OFFSET(bframebias), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
699
{"trellis", "rate-distortion optimal quantization", OFFSET(trellis), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|A|E},
700
{"directpred", "direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)", OFFSET(directpred), FF_OPT_TYPE_INT, 2, INT_MIN, INT_MAX, V|E},
701
{"bpyramid", "allows B-frames to be used as references for predicting", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_BPYRAMID, INT_MIN, INT_MAX, V|E, "flags2"},
702
{"wpred", "weighted biprediction for b-frames (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_WPRED, INT_MIN, INT_MAX, V|E, "flags2"},
703
{"mixed_refs", "one reference per partition, as opposed to one reference per macroblock", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_MIXED_REFS, INT_MIN, INT_MAX, V|E, "flags2"},
704
{"8x8dct", "high profile 8x8 transform (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_8X8DCT, INT_MIN, INT_MAX, V|E, "flags2"},
705
{"fastpskip", "fast pskip (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_FASTPSKIP, INT_MIN, INT_MAX, V|E, "flags2"},
706
{"aud", "access unit delimiters (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_AUD, INT_MIN, INT_MAX, V|E, "flags2"},
707
{"brdo", "b-frame rate-distortion optimization", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_BRDO, INT_MIN, INT_MAX, V|E, "flags2"},
708
{"skiprd", "RD optimal MB level residual skiping", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_SKIP_RD, INT_MIN, INT_MAX, V|E, "flags2"},
709
{"complexityblur", "reduce fluctuations in qp (before curve compression)", OFFSET(complexityblur), FF_OPT_TYPE_FLOAT, 20.0, FLT_MIN, FLT_MAX, V|E},
710
{"deblockalpha", "in-loop deblocking filter alphac0 parameter", OFFSET(deblockalpha), FF_OPT_TYPE_INT, DEFAULT, -6, 6, V|E},
711
{"deblockbeta", "in-loop deblocking filter beta parameter", OFFSET(deblockbeta), FF_OPT_TYPE_INT, DEFAULT, -6, 6, V|E},
712
{"partitions", "macroblock subpartition sizes to consider", OFFSET(partitions), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, V|E, "partitions"},
713
{"parti4x4", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_I4X4, INT_MIN, INT_MAX, V|E, "partitions"},
714
{"parti8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_I8X8, INT_MIN, INT_MAX, V|E, "partitions"},
715
{"partp4x4", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_P4X4, INT_MIN, INT_MAX, V|E, "partitions"},
716
{"partp8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_P8X8, INT_MIN, INT_MAX, V|E, "partitions"},
717
{"partb8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_B8X8, INT_MIN, INT_MAX, V|E, "partitions"},
718
{"sc_factor", "multiplied by qscale for each frame and added to scene_change_score", OFFSET(scenechange_factor), FF_OPT_TYPE_INT, 6, 0, INT_MAX, V|E},
719
{"mv0_threshold", NULL, OFFSET(mv0_threshold), FF_OPT_TYPE_INT, 256, 0, INT_MAX, V|E},
720
{"ivlc", "intra vlc table", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_INTRA_VLC, INT_MIN, INT_MAX, V|E, "flags2"},
721
{"b_sensitivity", "adjusts sensitivity of b_frame_strategy 1", OFFSET(b_sensitivity), FF_OPT_TYPE_INT, 40, 1, INT_MAX, V|E},
722
{"compression_level", NULL, OFFSET(compression_level), FF_OPT_TYPE_INT, FF_COMPRESSION_DEFAULT, INT_MIN, INT_MAX, V|A|E},
723
{"use_lpc", "sets whether to use LPC mode (FLAC)", OFFSET(use_lpc), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
724
{"lpc_coeff_precision", "LPC coefficient precision (FLAC)", OFFSET(lpc_coeff_precision), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|E},
725
{"min_prediction_order", NULL, OFFSET(min_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
726
{"max_prediction_order", NULL, OFFSET(max_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
727
{"prediction_order_method", "search method for selecting prediction order", OFFSET(prediction_order_method), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
728
{"min_partition_order", NULL, OFFSET(min_partition_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
729
{"max_partition_order", NULL, OFFSET(max_partition_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
730
{"timecode_frame_start", "GOP timecode frame start number, in non drop frame format", OFFSET(timecode_frame_start), FF_OPT_TYPE_INT, 0, 0, INT_MAX, V|E},
731
{"drop_frame_timecode", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_DROP_FRAME_TIMECODE, INT_MIN, INT_MAX, V|E, "flags2"},
732
{NULL},
733
};
734

    
735
#undef A
736
#undef V
737
#undef S
738
#undef E
739
#undef D
740
#undef DEFAULT
741

    
742
static AVClass av_codec_context_class = { "AVCodecContext", context_to_name, options };
743

    
744
/**
745
 * Sets the fields of the given AVCodecContext to default values.
746
 *
747
 * @param s The AVCodecContext of which the fields should be set to default values.
748
 */
749
void avcodec_get_context_defaults(AVCodecContext *s){
750
    memset(s, 0, sizeof(AVCodecContext));
751

    
752
    s->av_class= &av_codec_context_class;
753

    
754
    av_opt_set_defaults(s);
755

    
756
    s->rc_eq= "tex^qComp";
757
    s->time_base= (AVRational){0,1};
758
    s->get_buffer= avcodec_default_get_buffer;
759
    s->release_buffer= avcodec_default_release_buffer;
760
    s->get_format= avcodec_default_get_format;
761
    s->execute= avcodec_default_execute;
762
    s->sample_aspect_ratio= (AVRational){0,1};
763
    s->pix_fmt= PIX_FMT_NONE;
764
    s->sample_fmt= SAMPLE_FMT_S16; // FIXME: set to NONE
765

    
766
    s->palctrl = NULL;
767
    s->reget_buffer= avcodec_default_reget_buffer;
768
}
769

    
770
/**
771
 * Allocates an AVCodecContext and sets its fields to default values.  The
772
 * resulting struct can be deallocated by simply calling av_free().
773
 *
774
 * @return An AVCodecContext filled with default values or NULL on failure.
775
 * @see avcodec_get_context_defaults
776
 */
777
AVCodecContext *avcodec_alloc_context(void){
778
    AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
779

    
780
    if(avctx==NULL) return NULL;
781

    
782
    avcodec_get_context_defaults(avctx);
783

    
784
    return avctx;
785
}
786

    
787
/**
788
 * Sets its fields of the given AVFrame to default values.
789
 *
790
 * @param pic The AVFrame of which the fields should be set to default values.
791
 */
792
void avcodec_get_frame_defaults(AVFrame *pic){
793
    memset(pic, 0, sizeof(AVFrame));
794

    
795
    pic->pts= AV_NOPTS_VALUE;
796
    pic->key_frame= 1;
797
}
798

    
799
/**
800
 * Allocates an AVFrame and sets its fields to default values.  The resulting
801
 * struct can be deallocated by simply calling av_free().
802
 *
803
 * @return An AVFrame filled with default values or NULL on failure.
804
 * @see avcodec_get_frame_defaults
805
 */
806
AVFrame *avcodec_alloc_frame(void){
807
    AVFrame *pic= av_malloc(sizeof(AVFrame));
808

    
809
    if(pic==NULL) return NULL;
810

    
811
    avcodec_get_frame_defaults(pic);
812

    
813
    return pic;
814
}
815

    
816
int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
817
{
818
    int ret= -1;
819

    
820
    entangled_thread_counter++;
821
    if(entangled_thread_counter != 1){
822
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
823
        goto end;
824
    }
825

    
826
    if(avctx->codec)
827
        goto end;
828

    
829
    if (codec->priv_data_size > 0) {
830
        avctx->priv_data = av_mallocz(codec->priv_data_size);
831
        if (!avctx->priv_data)
832
            goto end;
833
    } else {
834
        avctx->priv_data = NULL;
835
    }
836

    
837
    if(avctx->coded_width && avctx->coded_height)
838
        avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
839
    else if(avctx->width && avctx->height)
840
        avcodec_set_dimensions(avctx, avctx->width, avctx->height);
841

    
842
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
843
        av_freep(&avctx->priv_data);
844
        goto end;
845
    }
846

    
847
    avctx->codec = codec;
848
    avctx->codec_id = codec->id;
849
    avctx->frame_number = 0;
850
    ret = avctx->codec->init(avctx);
851
    if (ret < 0) {
852
        av_freep(&avctx->priv_data);
853
        avctx->codec= NULL;
854
        goto end;
855
    }
856
    ret=0;
857
end:
858
    entangled_thread_counter--;
859
    return ret;
860
}
861

    
862
int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
863
                         const short *samples)
864
{
865
    if(buf_size < FF_MIN_BUFFER_SIZE && 0){
866
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
867
        return -1;
868
    }
869
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
870
        int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
871
        avctx->frame_number++;
872
        return ret;
873
    }else
874
        return 0;
875
}
876

    
877
/**
878
 * encode a frame.
879
 * @param buf buffer for the bitstream of encoded frame
880
 * @param buf_size the size of the buffer in bytes
881
 * @param pict the input picture to encode, in avctx.pix_fmt
882
 * @return -1 if error
883
 */
884
int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
885
                         const AVFrame *pict)
886
{
887
    if(buf_size < FF_MIN_BUFFER_SIZE){
888
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
889
        return -1;
890
    }
891
    if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
892
        return -1;
893
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
894
        int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
895
        avctx->frame_number++;
896
        emms_c(); //needed to avoid an emms_c() call before every return;
897

    
898
        return ret;
899
    }else
900
        return 0;
901
}
902

    
903
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
904
                            const AVSubtitle *sub)
905
{
906
    int ret;
907
    ret = avctx->codec->encode(avctx, buf, buf_size, (void *)sub);
908
    avctx->frame_number++;
909
    return ret;
910
}
911

    
912
/**
913
 * decode a frame.
914
 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
915
 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
916
 * @param buf_size the size of the buffer in bytes
917
 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
918
 * @return -1 if error, otherwise return the number of
919
 * bytes used.
920
 */
921
int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
922
                         int *got_picture_ptr,
923
                         uint8_t *buf, int buf_size)
924
{
925
    int ret;
926

    
927
    *got_picture_ptr= 0;
928
    if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
929
        return -1;
930
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
931
        ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
932
                                buf, buf_size);
933

    
934
        emms_c(); //needed to avoid an emms_c() call before every return;
935

    
936
        if (*got_picture_ptr)
937
            avctx->frame_number++;
938
    }else
939
        ret= 0;
940

    
941
    return ret;
942
}
943

    
944
/* decode an audio frame. return -1 if error, otherwise return the
945
   *number of bytes used. If no frame could be decompressed,
946
   *frame_size_ptr is zero. Otherwise, it is the decompressed frame
947
   *size in BYTES. */
948
int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
949
                         int *frame_size_ptr,
950
                         uint8_t *buf, int buf_size)
951
{
952
    int ret;
953

    
954
    //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
955
    if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
956
        av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
957
        return -1;
958
    }
959
    if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
960
       *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t) ||
961
       *frame_size_ptr < buf_size){
962
        av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
963
        return -1;
964
    }
965
    if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
966
        ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
967
                                buf, buf_size);
968
        avctx->frame_number++;
969
    }else{
970
        ret= 0;
971
        *frame_size_ptr=0;
972
    }
973
    return ret;
974
}
975

    
976
#if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
977
int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
978
                         int *frame_size_ptr,
979
                         uint8_t *buf, int buf_size){
980
    *frame_size_ptr= AVCODEC_MAX_AUDIO_FRAME_SIZE;
981
    return avcodec_decode_audio2(avctx, samples, frame_size_ptr, buf, buf_size);
982
}
983
#endif
984

    
985

    
986
/* decode a subtitle message. return -1 if error, otherwise return the
987
   *number of bytes used. If no subtitle could be decompressed,
988
   *got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */
989
int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
990
                            int *got_sub_ptr,
991
                            const uint8_t *buf, int buf_size)
992
{
993
    int ret;
994

    
995
    *got_sub_ptr = 0;
996
    ret = avctx->codec->decode(avctx, sub, got_sub_ptr,
997
                               (uint8_t *)buf, buf_size);
998
    if (*got_sub_ptr)
999
        avctx->frame_number++;
1000
    return ret;
1001
}
1002

    
1003
int avcodec_close(AVCodecContext *avctx)
1004
{
1005
    entangled_thread_counter++;
1006
    if(entangled_thread_counter != 1){
1007
        av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
1008
        entangled_thread_counter--;
1009
        return -1;
1010
    }
1011

    
1012
    if (avctx->codec->close)
1013
        avctx->codec->close(avctx);
1014
    avcodec_default_free_buffers(avctx);
1015
    av_freep(&avctx->priv_data);
1016
    avctx->codec = NULL;
1017
    entangled_thread_counter--;
1018
    return 0;
1019
}
1020

    
1021
/**
1022
 * Find an encoder with a matching codec ID.
1023
 *
1024
 * @param id CodecID of the requested encoder.
1025
 * @return An encoder if one was found, NULL otherwise.
1026
 */
1027
AVCodec *avcodec_find_encoder(enum CodecID id)
1028
{
1029
    AVCodec *p;
1030
    p = first_avcodec;
1031
    while (p) {
1032
        if (p->encode != NULL && p->id == id)
1033
            return p;
1034
        p = p->next;
1035
    }
1036
    return NULL;
1037
}
1038

    
1039
/**
1040
 * Find an encoder with the specified name.
1041
 *
1042
 * @param name Name of the requested encoder.
1043
 * @return An encoder if one was found, NULL otherwise.
1044
 */
1045
AVCodec *avcodec_find_encoder_by_name(const char *name)
1046
{
1047
    AVCodec *p;
1048
    p = first_avcodec;
1049
    while (p) {
1050
        if (p->encode != NULL && strcmp(name,p->name) == 0)
1051
            return p;
1052
        p = p->next;
1053
    }
1054
    return NULL;
1055
}
1056

    
1057
/**
1058
 * Find a decoder with a matching codec ID.
1059
 *
1060
 * @param id CodecID of the requested decoder.
1061
 * @return An decoder if one was found, NULL otherwise.
1062
 */
1063
AVCodec *avcodec_find_decoder(enum CodecID id)
1064
{
1065
    AVCodec *p;
1066
    p = first_avcodec;
1067
    while (p) {
1068
        if (p->decode != NULL && p->id == id)
1069
            return p;
1070
        p = p->next;
1071
    }
1072
    return NULL;
1073
}
1074

    
1075
/**
1076
 * Find an decoder with the specified name.
1077
 *
1078
 * @param name Name of the requested decoder.
1079
 * @return An decoder if one was found, NULL otherwise.
1080
 */
1081
AVCodec *avcodec_find_decoder_by_name(const char *name)
1082
{
1083
    AVCodec *p;
1084
    p = first_avcodec;
1085
    while (p) {
1086
        if (p->decode != NULL && strcmp(name,p->name) == 0)
1087
            return p;
1088
        p = p->next;
1089
    }
1090
    return NULL;
1091
}
1092

    
1093
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1094
{
1095
    const char *codec_name;
1096
    AVCodec *p;
1097
    char buf1[32];
1098
    char channels_str[100];
1099
    int bitrate;
1100

    
1101
    if (encode)
1102
        p = avcodec_find_encoder(enc->codec_id);
1103
    else
1104
        p = avcodec_find_decoder(enc->codec_id);
1105

    
1106
    if (p) {
1107
        codec_name = p->name;
1108
        if (!encode && enc->codec_id == CODEC_ID_MP3) {
1109
            if (enc->sub_id == 2)
1110
                codec_name = "mp2";
1111
            else if (enc->sub_id == 1)
1112
                codec_name = "mp1";
1113
        }
1114
    } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
1115
        /* fake mpeg2 transport stream codec (currently not
1116
           registered) */
1117
        codec_name = "mpeg2ts";
1118
    } else if (enc->codec_name[0] != '\0') {
1119
        codec_name = enc->codec_name;
1120
    } else {
1121
        /* output avi tags */
1122
        if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
1123
           && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
1124
            snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
1125
                     enc->codec_tag & 0xff,
1126
                     (enc->codec_tag >> 8) & 0xff,
1127
                     (enc->codec_tag >> 16) & 0xff,
1128
                     (enc->codec_tag >> 24) & 0xff,
1129
                      enc->codec_tag);
1130
        } else {
1131
            snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
1132
        }
1133
        codec_name = buf1;
1134
    }
1135

    
1136
    switch(enc->codec_type) {
1137
    case CODEC_TYPE_VIDEO:
1138
        snprintf(buf, buf_size,
1139
                 "Video: %s%s",
1140
                 codec_name, enc->mb_decision ? " (hq)" : "");
1141
        if (enc->pix_fmt != PIX_FMT_NONE) {
1142
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1143
                     ", %s",
1144
                     avcodec_get_pix_fmt_name(enc->pix_fmt));
1145
        }
1146
        if (enc->width) {
1147
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1148
                     ", %dx%d",
1149
                     enc->width, enc->height);
1150
            if(av_log_level >= AV_LOG_DEBUG){
1151
                int g= ff_gcd(enc->time_base.num, enc->time_base.den);
1152
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
1153
                     ", %d/%d",
1154
                     enc->time_base.num/g, enc->time_base.den/g);
1155
            }
1156
        }
1157
        if (encode) {
1158
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1159
                     ", q=%d-%d", enc->qmin, enc->qmax);
1160
        }
1161
        bitrate = enc->bit_rate;
1162
        break;
1163
    case CODEC_TYPE_AUDIO:
1164
        snprintf(buf, buf_size,
1165
                 "Audio: %s",
1166
                 codec_name);
1167
        switch (enc->channels) {
1168
            case 1:
1169
                strcpy(channels_str, "mono");
1170
                break;
1171
            case 2:
1172
                strcpy(channels_str, "stereo");
1173
                break;
1174
            case 6:
1175
                strcpy(channels_str, "5:1");
1176
                break;
1177
            default:
1178
                snprintf(channels_str, sizeof(channels_str), "%d channels", enc->channels);
1179
                break;
1180
        }
1181
        if (enc->sample_rate) {
1182
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1183
                     ", %d Hz, %s",
1184
                     enc->sample_rate,
1185
                     channels_str);
1186
        }
1187

    
1188
        /* for PCM codecs, compute bitrate directly */
1189
        switch(enc->codec_id) {
1190
        case CODEC_ID_PCM_S32LE:
1191
        case CODEC_ID_PCM_S32BE:
1192
        case CODEC_ID_PCM_U32LE:
1193
        case CODEC_ID_PCM_U32BE:
1194
            bitrate = enc->sample_rate * enc->channels * 32;
1195
            break;
1196
        case CODEC_ID_PCM_S24LE:
1197
        case CODEC_ID_PCM_S24BE:
1198
        case CODEC_ID_PCM_U24LE:
1199
        case CODEC_ID_PCM_U24BE:
1200
        case CODEC_ID_PCM_S24DAUD:
1201
            bitrate = enc->sample_rate * enc->channels * 24;
1202
            break;
1203
        case CODEC_ID_PCM_S16LE:
1204
        case CODEC_ID_PCM_S16BE:
1205
        case CODEC_ID_PCM_U16LE:
1206
        case CODEC_ID_PCM_U16BE:
1207
            bitrate = enc->sample_rate * enc->channels * 16;
1208
            break;
1209
        case CODEC_ID_PCM_S8:
1210
        case CODEC_ID_PCM_U8:
1211
        case CODEC_ID_PCM_ALAW:
1212
        case CODEC_ID_PCM_MULAW:
1213
            bitrate = enc->sample_rate * enc->channels * 8;
1214
            break;
1215
        default:
1216
            bitrate = enc->bit_rate;
1217
            break;
1218
        }
1219
        break;
1220
    case CODEC_TYPE_DATA:
1221
        snprintf(buf, buf_size, "Data: %s", codec_name);
1222
        bitrate = enc->bit_rate;
1223
        break;
1224
    case CODEC_TYPE_SUBTITLE:
1225
        snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1226
        bitrate = enc->bit_rate;
1227
        break;
1228
    default:
1229
        snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1230
        return;
1231
    }
1232
    if (encode) {
1233
        if (enc->flags & CODEC_FLAG_PASS1)
1234
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1235
                     ", pass 1");
1236
        if (enc->flags & CODEC_FLAG_PASS2)
1237
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
1238
                     ", pass 2");
1239
    }
1240
    if (bitrate != 0) {
1241
        snprintf(buf + strlen(buf), buf_size - strlen(buf),
1242
                 ", %d kb/s", bitrate / 1000);
1243
    }
1244
}
1245

    
1246
unsigned avcodec_version( void )
1247
{
1248
  return LIBAVCODEC_VERSION_INT;
1249
}
1250

    
1251
unsigned avcodec_build( void )
1252
{
1253
  return LIBAVCODEC_BUILD;
1254
}
1255

    
1256
static void init_crcs(void){
1257
    av_crc04C11DB7= av_mallocz_static(sizeof(AVCRC) * 257);
1258
    av_crc8005    = av_mallocz_static(sizeof(AVCRC) * 257);
1259
    av_crc07      = av_mallocz_static(sizeof(AVCRC) * 257);
1260
    av_crc_init(av_crc04C11DB7, 0, 32, 0x04c11db7, sizeof(AVCRC)*257);
1261
    av_crc_init(av_crc8005    , 0, 16, 0x8005    , sizeof(AVCRC)*257);
1262
    av_crc_init(av_crc07      , 0,  8, 0x07      , sizeof(AVCRC)*257);
1263
}
1264

    
1265
/* must be called before any other functions */
1266
void avcodec_init(void)
1267
{
1268
    static int inited = 0;
1269

    
1270
    if (inited != 0)
1271
        return;
1272
    inited = 1;
1273

    
1274
    dsputil_static_init();
1275
    init_crcs();
1276
}
1277

    
1278
/**
1279
 * Flush buffers, should be called when seeking or when switching to a different stream.
1280
 */
1281
void avcodec_flush_buffers(AVCodecContext *avctx)
1282
{
1283
    if(avctx->codec->flush)
1284
        avctx->codec->flush(avctx);
1285
}
1286

    
1287
void avcodec_default_free_buffers(AVCodecContext *s){
1288
    int i, j;
1289

    
1290
    if(s->internal_buffer==NULL) return;
1291

    
1292
    for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
1293
        InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
1294
        for(j=0; j<4; j++){
1295
            av_freep(&buf->base[j]);
1296
            buf->data[j]= NULL;
1297
        }
1298
    }
1299
    av_freep(&s->internal_buffer);
1300

    
1301
    s->internal_buffer_count=0;
1302
}
1303

    
1304
char av_get_pict_type_char(int pict_type){
1305
    switch(pict_type){
1306
    case I_TYPE: return 'I';
1307
    case P_TYPE: return 'P';
1308
    case B_TYPE: return 'B';
1309
    case S_TYPE: return 'S';
1310
    case SI_TYPE:return 'i';
1311
    case SP_TYPE:return 'p';
1312
    default:     return '?';
1313
    }
1314
}
1315

    
1316
int av_get_bits_per_sample(enum CodecID codec_id){
1317
    switch(codec_id){
1318
    case CODEC_ID_ADPCM_SBPRO_2:
1319
        return 2;
1320
    case CODEC_ID_ADPCM_SBPRO_3:
1321
        return 3;
1322
    case CODEC_ID_ADPCM_SBPRO_4:
1323
    case CODEC_ID_ADPCM_CT:
1324
        return 4;
1325
    case CODEC_ID_PCM_ALAW:
1326
    case CODEC_ID_PCM_MULAW:
1327
    case CODEC_ID_PCM_S8:
1328
    case CODEC_ID_PCM_U8:
1329
        return 8;
1330
    case CODEC_ID_PCM_S16BE:
1331
    case CODEC_ID_PCM_S16LE:
1332
    case CODEC_ID_PCM_U16BE:
1333
    case CODEC_ID_PCM_U16LE:
1334
        return 16;
1335
    case CODEC_ID_PCM_S24DAUD:
1336
    case CODEC_ID_PCM_S24BE:
1337
    case CODEC_ID_PCM_S24LE:
1338
    case CODEC_ID_PCM_U24BE:
1339
    case CODEC_ID_PCM_U24LE:
1340
        return 24;
1341
    case CODEC_ID_PCM_S32BE:
1342
    case CODEC_ID_PCM_S32LE:
1343
    case CODEC_ID_PCM_U32BE:
1344
    case CODEC_ID_PCM_U32LE:
1345
        return 32;
1346
    default:
1347
        return 0;
1348
    }
1349
}
1350

    
1351
#if !defined(HAVE_THREADS)
1352
int avcodec_thread_init(AVCodecContext *s, int thread_count){
1353
    return -1;
1354
}
1355
#endif
1356

    
1357
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1358
{
1359
    unsigned int n = 0;
1360

    
1361
    while(v >= 0xff) {
1362
        *s++ = 0xff;
1363
        v -= 0xff;
1364
        n++;
1365
    }
1366
    *s = v;
1367
    n++;
1368
    return n;
1369
}
1370

    
1371
/* Wrapper to work around the lack of mkstemp() on mingw/cygin.
1372
 * Also, tries to create file in /tmp first, if possible.
1373
 * *prefix can be a character constant; *filename will be allocated internally.
1374
 * Returns file descriptor of opened file (or -1 on error)
1375
 * and opened file name in **filename. */
1376
int av_tempfile(char *prefix, char **filename) {
1377
    int fd=-1;
1378
#ifdef __MINGW32__
1379
    *filename = tempnam(".", prefix);
1380
#else
1381
    size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
1382
    *filename = av_malloc(len);
1383
#endif
1384
    /* -----common section-----*/
1385
    if (*filename == NULL) {
1386
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
1387
        return -1;
1388
    }
1389
#ifdef __MINGW32__
1390
    fd = open(*filename, _O_RDWR | _O_BINARY | _O_CREAT, 0444);
1391
#else
1392
    snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
1393
    fd = mkstemp(*filename);
1394
    if (fd < 0) {
1395
        snprintf(*filename, len, "./%sXXXXXX", prefix);
1396
        fd = mkstemp(*filename);
1397
    }
1398
#endif
1399
    /* -----common section-----*/
1400
    if (fd < 0) {
1401
        av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
1402
        return -1;
1403
    }
1404
    return fd; /* success */
1405
}