libavcodec/utils.c

   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 "libavutil/integer.h"
  29 #include "libavutil/crc.h"
  30 #include "avcodec.h"
  31 #include "dsputil.h"
  32 #include "opt.h"
  33 #include "imgconvert.h"
  34 #include <stdarg.h>
  35 #include <limits.h>
  36 #include <float.h>
  37 #if !defined(HAVE_MKSTEMP)
  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 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
  63 {
  64     if(min_size < *size)
  65         return ptr;
  66
  67     *size= FFMAX(17*min_size/16 + 32, min_size);
  68
  69     ptr= av_realloc(ptr, *size);
  70     if(!ptr) //we could set this to the unmodified min_size but this is safer if the user lost the ptr and uses NULL now
  71         *size= 0;
  72
  73     return ptr;
  74 }
  75
  76 /* encoder management */
  77 AVCodec *first_avcodec = NULL;
  78
  79 AVCodec *av_codec_next(AVCodec *c){
  80     if(c) return c->next;
  81     else  return first_avcodec;
  82 }
  83
  84 void register_avcodec(AVCodec *format)
  85 {
  86     AVCodec **p;
  87     p = &first_avcodec;
  88     while (*p != NULL) p = &(*p)->next;
  89     *p = format;
  90     format->next = NULL;
  91 }
  92
  93 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
  94     s->coded_width = width;
  95     s->coded_height= height;
  96     s->width = -((-width )>>s->lowres);
  97     s->height= -((-height)>>s->lowres);
  98 }
  99
 100 typedef struct InternalBuffer{
 101     int last_pic_num;
 102     uint8_t *base[4];
 103     uint8_t *data[4];
 104     int linesize[4];
 105     int width, height;
 106     enum PixelFormat pix_fmt;
 107 }InternalBuffer;
 108
 109 #define INTERNAL_BUFFER_SIZE 32
 110
 111 #define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
 112
 113 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
 114     int w_align= 1;
 115     int h_align= 1;
 116
 117     switch(s->pix_fmt){
 118     case PIX_FMT_YUV420P:
 119     case PIX_FMT_YUYV422:
 120     case PIX_FMT_UYVY422:
 121     case PIX_FMT_YUV422P:
 122     case PIX_FMT_YUV444P:
 123     case PIX_FMT_GRAY8:
 124     case PIX_FMT_GRAY16BE:
 125     case PIX_FMT_GRAY16LE:
 126     case PIX_FMT_YUVJ420P:
 127     case PIX_FMT_YUVJ422P:
 128     case PIX_FMT_YUVJ444P:
 129     case PIX_FMT_YUVA420P:
 130         w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
 131         h_align= 16;
 132         break;
 133     case PIX_FMT_YUV411P:
 134     case PIX_FMT_UYYVYY411:
 135         w_align=32;
 136         h_align=8;
 137         break;
 138     case PIX_FMT_YUV410P:
 139         if(s->codec_id == CODEC_ID_SVQ1){
 140             w_align=64;
 141             h_align=64;
 142         }
 143     case PIX_FMT_RGB555:
 144         if(s->codec_id == CODEC_ID_RPZA){
 145             w_align=4;
 146             h_align=4;
 147         }
 148     case PIX_FMT_PAL8:
 149         if(s->codec_id == CODEC_ID_SMC){
 150             w_align=4;
 151             h_align=4;
 152         }
 153         break;
 154     case PIX_FMT_BGR24:
 155         if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
 156             w_align=4;
 157             h_align=4;
 158         }
 159         break;
 160     default:
 161         w_align= 1;
 162         h_align= 1;
 163         break;
 164     }
 165
 166     *width = ALIGN(*width , w_align);
 167     *height= ALIGN(*height, h_align);
 168 }
 169
 170 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
 171     if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/4)
 172         return 0;
 173
 174     av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
 175     return -1;
 176 }
 177
 178 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
 179     int i;
 180     int w= s->width;
 181     int h= s->height;
 182     InternalBuffer *buf;
 183     int *picture_number;
 184
 185     if(pic->data[0]!=NULL) {
 186         av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
 187         return -1;
 188     }
 189     if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
 190         av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
 191         return -1;
 192     }
 193
 194     if(avcodec_check_dimensions(s,w,h))
 195         return -1;
 196
 197     if(s->internal_buffer==NULL){
 198         s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
 199     }
 200 #if 0
 201     s->internal_buffer= av_fast_realloc(
 202         s->internal_buffer,
 203         &s->internal_buffer_size,
 204         sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
 205         );
 206 #endif
 207
 208     buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
 209     picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
 210     (*picture_number)++;
 211
 212     if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
 213         for(i=0; i<4; i++){
 214             av_freep(&buf->base[i]);
 215             buf->data[i]= NULL;
 216         }
 217     }
 218
 219     if(buf->base[0]){
 220         pic->age= *picture_number - buf->last_pic_num;
 221         buf->last_pic_num= *picture_number;
 222     }else{
 223         int h_chroma_shift, v_chroma_shift;
 224         int size[4] = {0};
 225         int tmpsize;
 226         AVPicture picture;
 227
 228         avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
 229
 230         avcodec_align_dimensions(s, &w, &h);
 231
 232         if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
 233             w+= EDGE_WIDTH*2;
 234             h+= EDGE_WIDTH*2;
 235         }
 236         avcodec_align_dimensions(s, &w, &h);
 237
 238         ff_fill_linesize(&picture, s->pix_fmt, w);
 239
 240         for (i=0; i<4; i++)
 241             picture.linesize[i] = ALIGN(picture.linesize[i], STRIDE_ALIGN);
 242
 243         tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
 244
 245         for (i=0; i<3 && picture.data[i+1]; i++)
 246             size[i] = picture.data[i+1] - picture.data[i];
 247         size[i] = tmpsize - (picture.data[i] - picture.data[0]);
 248
 249         buf->last_pic_num= -256*256*256*64;
 250         memset(buf->base, 0, sizeof(buf->base));
 251         memset(buf->data, 0, sizeof(buf->data));
 252
 253         for(i=0; i<4 && size[i]; i++){
 254             const int h_shift= i==0 ? 0 : h_chroma_shift;
 255             const int v_shift= i==0 ? 0 : v_chroma_shift;
 256
 257             buf->linesize[i]= picture.linesize[i];
 258
 259             buf->base[i]= av_malloc(size[i]+16); //FIXME 16
 260             if(buf->base[i]==NULL) return -1;
 261             memset(buf->base[i], 128, size[i]);
 262
 263             // no edge if EDEG EMU or not planar YUV, we check for PAL8 redundantly to protect against a exploitable bug regression ...
 264             if((s->flags&CODEC_FLAG_EMU_EDGE) || (s->pix_fmt == PIX_FMT_PAL8) || !size[2])
 265                 buf->data[i] = buf->base[i];
 266             else
 267                 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), STRIDE_ALIGN);
 268         }
 269         buf->width  = s->width;
 270         buf->height = s->height;
 271         buf->pix_fmt= s->pix_fmt;
 272         pic->age= 256*256*256*64;
 273     }
 274     pic->type= FF_BUFFER_TYPE_INTERNAL;
 275
 276     for(i=0; i<4; i++){
 277         pic->base[i]= buf->base[i];
 278         pic->data[i]= buf->data[i];
 279         pic->linesize[i]= buf->linesize[i];
 280     }
 281     s->internal_buffer_count++;
 282
 283     return 0;
 284 }
 285
 286 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
 287     int i;
 288     InternalBuffer *buf, *last;
 289
 290     assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
 291     assert(s->internal_buffer_count);
 292
 293     buf = NULL; /* avoids warning */
 294     for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
 295         buf= &((InternalBuffer*)s->internal_buffer)[i];
 296         if(buf->data[0] == pic->data[0])
 297             break;
 298     }
 299     assert(i < s->internal_buffer_count);
 300     s->internal_buffer_count--;
 301     last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
 302
 303     FFSWAP(InternalBuffer, *buf, *last);
 304
 305     for(i=0; i<4; i++){
 306         pic->data[i]=NULL;
 307 //        pic->base[i]=NULL;
 308     }
 309 //printf("R%X\n", pic->opaque);
 310 }
 311
 312 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
 313     AVFrame temp_pic;
 314     int i;
 315
 316     /* If no picture return a new buffer */
 317     if(pic->data[0] == NULL) {
 318         /* We will copy from buffer, so must be readable */
 319         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
 320         return s->get_buffer(s, pic);
 321     }
 322
 323     /* If internal buffer type return the same buffer */
 324     if(pic->type == FF_BUFFER_TYPE_INTERNAL)
 325         return 0;
 326
 327     /*
 328      * Not internal type and reget_buffer not overridden, emulate cr buffer
 329      */
 330     temp_pic = *pic;
 331     for(i = 0; i < 4; i++)
 332         pic->data[i] = pic->base[i] = NULL;
 333     pic->opaque = NULL;
 334     /* Allocate new frame */
 335     if (s->get_buffer(s, pic))
 336         return -1;
 337     /* Copy image data from old buffer to new buffer */
 338     av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
 339              s->height);
 340     s->release_buffer(s, &temp_pic); // Release old frame
 341     return 0;
 342 }
 343
 344 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
 345     int i;
 346
 347     for(i=0; i<count; i++){
 348         int r= func(c, arg[i]);
 349         if(ret) ret[i]= r;
 350     }
 351     return 0;
 352 }
 353
 354 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
 355     return fmt[0];
 356 }
 357
 358 static const char* context_to_name(void* ptr) {
 359     AVCodecContext *avc= ptr;
 360
 361     if(avc && avc->codec && avc->codec->name)
 362         return avc->codec->name;
 363     else
 364         return "NULL";
 365 }
 366
 367 #define OFFSET(x) offsetof(AVCodecContext,x)
 368 #define DEFAULT 0 //should be NAN but it does not work as it is not a constant in glibc as required by ANSI/ISO C
 369 //these names are too long to be readable
 370 #define V AV_OPT_FLAG_VIDEO_PARAM
 371 #define A AV_OPT_FLAG_AUDIO_PARAM
 372 #define S AV_OPT_FLAG_SUBTITLE_PARAM
 373 #define E AV_OPT_FLAG_ENCODING_PARAM
 374 #define D AV_OPT_FLAG_DECODING_PARAM
 375
 376 #define AV_CODEC_DEFAULT_BITRATE 200*1000
 377
 378 static const AVOption options[]={
 379 {"b", "set bitrate (in bits/s)", OFFSET(bit_rate), FF_OPT_TYPE_INT, AV_CODEC_DEFAULT_BITRATE, INT_MIN, INT_MAX, V|E},
 380 {"ab", "set bitrate (in bits/s)", OFFSET(bit_rate), FF_OPT_TYPE_INT, 64*1000, INT_MIN, INT_MAX, A|E},
 381 {"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},
 382 {"flags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, 0, UINT_MAX, V|A|E|D, "flags"},
 383 {"mv4", "use four motion vector by macroblock (mpeg4)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_4MV, INT_MIN, INT_MAX, V|E, "flags"},
 384 {"obmc", "use overlapped block motion compensation (h263+)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_OBMC, INT_MIN, INT_MAX, V|E, "flags"},
 385 {"qpel", "use 1/4 pel motion compensation", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QPEL, INT_MIN, INT_MAX, V|E, "flags"},
 386 {"loop", "use loop filter", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_LOOP_FILTER, INT_MIN, INT_MAX, V|E, "flags"},
 387 {"qscale", "use fixed qscale", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QSCALE, INT_MIN, INT_MAX, 0, "flags"},
 388 {"gmc", "use gmc", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GMC, INT_MIN, INT_MAX, V|E, "flags"},
 389 {"mv0", "always try a mb with mv=<0,0>", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_MV0, INT_MIN, INT_MAX, V|E, "flags"},
 390 {"part", "use data partitioning", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PART, INT_MIN, INT_MAX, V|E, "flags"},
 391 {"input_preserved", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INPUT_PRESERVED, INT_MIN, INT_MAX, 0, "flags"},
 392 {"pass1", "use internal 2pass ratecontrol in first  pass mode", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PASS1, INT_MIN, INT_MAX, 0, "flags"},
 393 {"pass2", "use internal 2pass ratecontrol in second pass mode", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PASS2, INT_MIN, INT_MAX, 0, "flags"},
 394 {"extern_huff", "use external huffman table (for mjpeg)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_EXTERN_HUFF, INT_MIN, INT_MAX, 0, "flags"},
 395 {"gray", "only decode/encode grayscale", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GRAY, INT_MIN, INT_MAX, V|E|D, "flags"},
 396 {"emu_edge", "don't draw edges", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_EMU_EDGE, INT_MIN, INT_MAX, 0, "flags"},
 397 {"psnr", "error[?] variables will be set during encoding", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PSNR, INT_MIN, INT_MAX, V|E, "flags"},
 398 {"truncated", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_TRUNCATED, INT_MIN, INT_MAX, 0, "flags"},
 399 {"naq", "normalize adaptive quantization", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_NORMALIZE_AQP, INT_MIN, INT_MAX, V|E, "flags"},
 400 {"ildct", "use interlaced dct", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INTERLACED_DCT, INT_MIN, INT_MAX, V|E, "flags"},
 401 {"low_delay", "force low delay", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_LOW_DELAY, INT_MIN, INT_MAX, V|D|E, "flags"},
 402 {"alt", "enable alternate scantable (mpeg2/mpeg4)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_ALT_SCAN, INT_MIN, INT_MAX, V|E, "flags"},
 403 {"trell", "use trellis quantization", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_TRELLIS_QUANT, INT_MIN, INT_MAX, V|E, "flags"},
 404 {"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"},
 405 {"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"},
 406 {"aic", "h263 advanced intra coding / mpeg4 ac prediction", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_AC_PRED, INT_MIN, INT_MAX, V|E, "flags"},
 407 {"umv", "use unlimited motion vectors", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_UMV, INT_MIN, INT_MAX, V|E, "flags"},
 408 {"cbp", "use rate distortion optimization for cbp", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_CBP_RD, INT_MIN, INT_MAX, V|E, "flags"},
 409 {"qprd", "use rate distortion optimization for qp selection", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QP_RD, INT_MIN, INT_MAX, V|E, "flags"},
 410 {"aiv", "h263 alternative inter vlc", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_AIV, INT_MIN, INT_MAX, V|E, "flags"},
 411 {"slice", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_SLICE_STRUCT, INT_MIN, INT_MAX, V|E, "flags"},
 412 {"ilme", "interlaced motion estimation", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INTERLACED_ME, INT_MIN, INT_MAX, V|E, "flags"},
 413 {"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"},
 414 {"cgop", "closed gop", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_CLOSED_GOP, INT_MIN, INT_MAX, V|E, "flags"},
 415 {"fast", "allow non spec compliant speedup tricks", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_FAST, INT_MIN, INT_MAX, V|E, "flags2"},
 416 {"sgop", "strictly enforce gop size", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_STRICT_GOP, INT_MIN, INT_MAX, V|E, "flags2"},
 417 {"noout", "skip bitstream encoding", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_NO_OUTPUT, INT_MIN, INT_MAX, V|E, "flags2"},
 418 {"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"},
 419 {"sub_id", NULL, OFFSET(sub_id), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 420 {"me_method", "set motion estimation method", OFFSET(me_method), FF_OPT_TYPE_INT, ME_EPZS, INT_MIN, INT_MAX, V|E, "me_method"},
 421 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
 422 {"me", "set motion estimation method (deprecated, use me_method instead)", OFFSET(me_method), FF_OPT_TYPE_INT, ME_EPZS, INT_MIN, INT_MAX, V|E, "me_method"},
 423 #endif
 424 {"zero", "zero motion estimation (fastest)", 0, FF_OPT_TYPE_CONST, ME_ZERO, INT_MIN, INT_MAX, V|E, "me_method" },
 425 {"full", "full motion estimation (slowest)", 0, FF_OPT_TYPE_CONST, ME_FULL, INT_MIN, INT_MAX, V|E, "me_method" },
 426 {"epzs", "EPZS motion estimation (default)", 0, FF_OPT_TYPE_CONST, ME_EPZS, INT_MIN, INT_MAX, V|E, "me_method" },
 427 {"log", "log motion estimation", 0, FF_OPT_TYPE_CONST, ME_LOG, INT_MIN, INT_MAX, V|E, "me_method" },
 428 {"phods", "phods motion estimation", 0, FF_OPT_TYPE_CONST, ME_PHODS, INT_MIN, INT_MAX, V|E, "me_method" },
 429 {"x1", "X1 motion estimation", 0, FF_OPT_TYPE_CONST, ME_X1, INT_MIN, INT_MAX, V|E, "me_method" },
 430 {"hex", "hex motion estimation", 0, FF_OPT_TYPE_CONST, ME_HEX, INT_MIN, INT_MAX, V|E, "me_method" },
 431 {"umh", "umh motion estimation", 0, FF_OPT_TYPE_CONST, ME_UMH, INT_MIN, INT_MAX, V|E, "me_method" },
 432 {"iter", "iter motion estimation", 0, FF_OPT_TYPE_CONST, ME_ITER, INT_MIN, INT_MAX, V|E, "me_method" },
 433 {"extradata_size", NULL, OFFSET(extradata_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 434 {"time_base", NULL, OFFSET(time_base), FF_OPT_TYPE_RATIONAL, DEFAULT, INT_MIN, INT_MAX},
 435 {"g", "set the group of picture size", OFFSET(gop_size), FF_OPT_TYPE_INT, 12, INT_MIN, INT_MAX, V|E},
 436 {"rate_emu", "frame rate emulation", OFFSET(rate_emu), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 437 {"ar", "set audio sampling rate (in Hz)", OFFSET(sample_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 438 {"ac", "set number of audio channels", OFFSET(channels), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 439 {"cutoff", "set cutoff bandwidth", OFFSET(cutoff), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|E},
 440 {"frame_size", NULL, OFFSET(frame_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|E},
 441 {"frame_number", NULL, OFFSET(frame_number), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 442 {"real_pict_num", NULL, OFFSET(real_pict_num), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 443 {"delay", NULL, OFFSET(delay), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 444 {"qcomp", "video quantizer scale compression (VBR)", OFFSET(qcompress), FF_OPT_TYPE_FLOAT, 0.5, FLT_MIN, FLT_MAX, V|E},
 445 {"qblur", "video quantizer scale blur (VBR)", OFFSET(qblur), FF_OPT_TYPE_FLOAT, 0.5, FLT_MIN, FLT_MAX, V|E},
 446 {"qmin", "min video quantizer scale (VBR)", OFFSET(qmin), FF_OPT_TYPE_INT, 2, 1, 51, V|E},
 447 {"qmax", "max video quantizer scale (VBR)", OFFSET(qmax), FF_OPT_TYPE_INT, 31, 1, 51, V|E},
 448 {"qdiff", "max difference between the quantizer scale (VBR)", OFFSET(max_qdiff), FF_OPT_TYPE_INT, 3, INT_MIN, INT_MAX, V|E},
 449 {"bf", "use 'frames' B frames", OFFSET(max_b_frames), FF_OPT_TYPE_INT, DEFAULT, 0, FF_MAX_B_FRAMES, V|E},
 450 {"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},
 451 {"rc_strategy", "ratecontrol method", OFFSET(rc_strategy), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 452 {"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},
 453 {"hurry_up", NULL, OFFSET(hurry_up), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D},
 454 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
 455 {"rtp_mode", NULL, OFFSET(rtp_mode), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 456 #endif
 457 {"ps", "rtp payload size in bits", OFFSET(rtp_payload_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 458 {"mv_bits", NULL, OFFSET(mv_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 459 {"header_bits", NULL, OFFSET(header_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 460 {"i_tex_bits", NULL, OFFSET(i_tex_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 461 {"p_tex_bits", NULL, OFFSET(p_tex_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 462 {"i_count", NULL, OFFSET(i_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 463 {"p_count", NULL, OFFSET(p_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 464 {"skip_count", NULL, OFFSET(skip_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 465 {"misc_bits", NULL, OFFSET(misc_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 466 {"frame_bits", NULL, OFFSET(frame_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 467 {"codec_tag", NULL, OFFSET(codec_tag), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 468 {"bug", "workaround not auto detected encoder bugs", OFFSET(workaround_bugs), FF_OPT_TYPE_FLAGS, FF_BUG_AUTODETECT, INT_MIN, INT_MAX, V|D, "bug"},
 469 {"autodetect", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AUTODETECT, INT_MIN, INT_MAX, V|D, "bug"},
 470 {"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"},
 471 {"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"},
 472 {"ump4", "(autodetected if fourcc==UMP4)", 0, FF_OPT_TYPE_CONST, FF_BUG_UMP4, INT_MIN, INT_MAX, V|D, "bug"},
 473 {"no_padding", "padding bug (autodetected)", 0, FF_OPT_TYPE_CONST, FF_BUG_NO_PADDING, INT_MIN, INT_MAX, V|D, "bug"},
 474 {"amv", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AMV, INT_MIN, INT_MAX, V|D, "bug"},
 475 {"ac_vlc", "illegal vlc bug (autodetected per fourcc)", 0, FF_OPT_TYPE_CONST, FF_BUG_AC_VLC, INT_MIN, INT_MAX, V|D, "bug"},
 476 {"qpel_chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_QPEL_CHROMA, INT_MIN, INT_MAX, V|D, "bug"},
 477 {"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"},
 478 {"qpel_chroma2", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_QPEL_CHROMA2, INT_MIN, INT_MAX, V|D, "bug"},
 479 {"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"},
 480 {"edge", "edge padding bug (autodetected per fourcc/version)", 0, FF_OPT_TYPE_CONST, FF_BUG_EDGE, INT_MIN, INT_MAX, V|D, "bug"},
 481 {"hpel_chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_HPEL_CHROMA, INT_MIN, INT_MAX, V|D, "bug"},
 482 {"dc_clip", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_DC_CLIP, INT_MIN, INT_MAX, V|D, "bug"},
 483 {"ms", "workaround various bugs in microsofts broken decoders", 0, FF_OPT_TYPE_CONST, FF_BUG_MS, INT_MIN, INT_MAX, V|D, "bug"},
 484 {"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},
 485 {"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},
 486 {"strict", "how strictly to follow the standards", OFFSET(strict_std_compliance), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|V|D, "strict"},
 487 {"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"},
 488 {"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"},
 489 {"normal", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_NORMAL, INT_MIN, INT_MAX, V|E, "strict"},
 490 {"inofficial", "allow inofficial extensions", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_INOFFICIAL, INT_MIN, INT_MAX, V|E, "strict"},
 491 {"experimental", "allow non standardized experimental things", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_EXPERIMENTAL, INT_MIN, INT_MAX, V|E, "strict"},
 492 {"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},
 493 {"er", "set error resilience strategy", OFFSET(error_resilience), FF_OPT_TYPE_INT, FF_ER_CAREFUL, INT_MIN, INT_MAX, A|V|D, "er"},
 494 {"careful", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_CAREFUL, INT_MIN, INT_MAX, V|D, "er"},
 495 {"compliant", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_COMPLIANT, INT_MIN, INT_MAX, V|D, "er"},
 496 {"aggressive", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_AGGRESSIVE, INT_MIN, INT_MAX, V|D, "er"},
 497 {"very_aggressive", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_VERY_AGGRESSIVE, INT_MIN, INT_MAX, V|D, "er"},
 498 {"has_b_frames", NULL, OFFSET(has_b_frames), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 499 {"block_align", NULL, OFFSET(block_align), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 500 {"parse_only", NULL, OFFSET(parse_only), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 501 {"mpeg_quant", "use MPEG quantizers instead of H.263", OFFSET(mpeg_quant), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 502 {"stats_out", NULL, OFFSET(stats_out), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX},
 503 {"stats_in", NULL, OFFSET(stats_in), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX},
 504 {"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},
 505 {"rc_qmod_amp", "experimental quantizer modulation", OFFSET(rc_qmod_amp), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},
 506 {"rc_qmod_freq", "experimental quantizer modulation", OFFSET(rc_qmod_freq), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 507 {"rc_override_count", NULL, OFFSET(rc_override_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 508 {"rc_eq", "set rate control equation", OFFSET(rc_eq), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX, V|E},
 509 {"maxrate", "set max video bitrate tolerance (in bits/s)", OFFSET(rc_max_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 510 {"minrate", "set min video bitrate tolerance (in bits/s)", OFFSET(rc_min_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 511 {"bufsize", "set ratecontrol buffer size (in bits)", OFFSET(rc_buffer_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|V|E},
 512 {"rc_buf_aggressivity", "currently useless", OFFSET(rc_buffer_aggressivity), FF_OPT_TYPE_FLOAT, 1.0, FLT_MIN, FLT_MAX, V|E},
 513 {"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},
 514 {"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},
 515 {"rc_init_cplx", "initial complexity for 1-pass encoding", OFFSET(rc_initial_cplx), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},
 516 {"dct", "DCT algorithm", OFFSET(dct_algo), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|E, "dct"},
 517 {"auto", "autoselect a good one (default)", 0, FF_OPT_TYPE_CONST, FF_DCT_AUTO, INT_MIN, INT_MAX, V|E, "dct"},
 518 {"fastint", "fast integer", 0, FF_OPT_TYPE_CONST, FF_DCT_FASTINT, INT_MIN, INT_MAX, V|E, "dct"},
 519 {"int", "accurate integer", 0, FF_OPT_TYPE_CONST, FF_DCT_INT, INT_MIN, INT_MAX, V|E, "dct"},
 520 {"mmx", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_MMX, INT_MIN, INT_MAX, V|E, "dct"},
 521 {"mlib", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_MLIB, INT_MIN, INT_MAX, V|E, "dct"},
 522 {"altivec", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_ALTIVEC, INT_MIN, INT_MAX, V|E, "dct"},
 523 {"faan", "floating point AAN DCT", 0, FF_OPT_TYPE_CONST, FF_DCT_FAAN, INT_MIN, INT_MAX, V|E, "dct"},
 524 {"lumi_mask", "compresses bright areas stronger than medium ones", OFFSET(lumi_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
 525 {"tcplx_mask", "temporal complexity masking", OFFSET(temporal_cplx_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
 526 {"scplx_mask", "spatial complexity masking", OFFSET(spatial_cplx_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
 527 {"p_mask", "inter masking", OFFSET(p_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
 528 {"dark_mask", "compresses dark areas stronger than medium ones", OFFSET(dark_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
 529 {"unused", NULL, OFFSET(unused), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 530 {"idct", "select IDCT implementation", OFFSET(idct_algo), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|E|D, "idct"},
 531 {"auto", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_AUTO, INT_MIN, INT_MAX, V|E|D, "idct"},
 532 {"int", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_INT, INT_MIN, INT_MAX, V|E|D, "idct"},
 533 {"simple", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLE, INT_MIN, INT_MAX, V|E|D, "idct"},
 534 {"simplemmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEMMX, INT_MIN, INT_MAX, V|E|D, "idct"},
 535 {"libmpeg2mmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_LIBMPEG2MMX, INT_MIN, INT_MAX, V|E|D, "idct"},
 536 {"ps2", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_PS2, INT_MIN, INT_MAX, V|E|D, "idct"},
 537 {"mlib", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_MLIB, INT_MIN, INT_MAX, V|E|D, "idct"},
 538 {"arm", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_ARM, INT_MIN, INT_MAX, V|E|D, "idct"},
 539 {"altivec", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_ALTIVEC, INT_MIN, INT_MAX, V|E|D, "idct"},
 540 {"sh4", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SH4, INT_MIN, INT_MAX, V|E|D, "idct"},
 541 {"simplearm", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEARM, INT_MIN, INT_MAX, V|E|D, "idct"},
 542 {"simplearmv5te", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEARMV5TE, INT_MIN, INT_MAX, V|E|D, "idct"},
 543 {"h264", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_H264, INT_MIN, INT_MAX, V|E|D, "idct"},
 544 {"vp3", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_VP3, INT_MIN, INT_MAX, V|E|D, "idct"},
 545 {"ipp", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_IPP, INT_MIN, INT_MAX, V|E|D, "idct"},
 546 {"xvidmmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_XVIDMMX, INT_MIN, INT_MAX, V|E|D, "idct"},
 547 {"faani", "floating point AAN IDCT", 0, FF_OPT_TYPE_CONST, FF_IDCT_FAAN, INT_MIN, INT_MAX, V|D|E, "idct"},
 548 {"slice_count", NULL, OFFSET(slice_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 549 {"ec", "set error concealment strategy", OFFSET(error_concealment), FF_OPT_TYPE_FLAGS, 3, INT_MIN, INT_MAX, V|D, "ec"},
 550 {"guess_mvs", "iterative motion vector (MV) search (slow)", 0, FF_OPT_TYPE_CONST, FF_EC_GUESS_MVS, INT_MIN, INT_MAX, V|D, "ec"},
 551 {"deblock", "use strong deblock filter for damaged MBs", 0, FF_OPT_TYPE_CONST, FF_EC_DEBLOCK, INT_MIN, INT_MAX, V|D, "ec"},
 552 {"bits_per_sample", NULL, OFFSET(bits_per_sample), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 553 {"pred", "prediction method", OFFSET(prediction_method), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "pred"},
 554 {"left", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_LEFT, INT_MIN, INT_MAX, V|E, "pred"},
 555 {"plane", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_PLANE, INT_MIN, INT_MAX, V|E, "pred"},
 556 {"median", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_MEDIAN, INT_MIN, INT_MAX, V|E, "pred"},
 557 {"aspect", "sample aspect ratio", OFFSET(sample_aspect_ratio), FF_OPT_TYPE_RATIONAL, DEFAULT, 0, 10, V|E},
 558 {"debug", "print specific debug info", OFFSET(debug), FF_OPT_TYPE_FLAGS, DEFAULT, 0, INT_MAX, V|A|S|E|D, "debug"},
 559 {"pict", "picture info", 0, FF_OPT_TYPE_CONST, FF_DEBUG_PICT_INFO, INT_MIN, INT_MAX, V|D, "debug"},
 560 {"rc", "rate control", 0, FF_OPT_TYPE_CONST, FF_DEBUG_RC, INT_MIN, INT_MAX, V|E, "debug"},
 561 {"bitstream", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_BITSTREAM, INT_MIN, INT_MAX, V|D, "debug"},
 562 {"mb_type", "macroblock (MB) type", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},
 563 {"qp", "per-block quantization parameter (QP)", 0, FF_OPT_TYPE_CONST, FF_DEBUG_QP, INT_MIN, INT_MAX, V|D, "debug"},
 564 {"mv", "motion vector", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MV, INT_MIN, INT_MAX, V|D, "debug"},
 565 {"dct_coeff", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_DCT_COEFF, INT_MIN, INT_MAX, V|D, "debug"},
 566 {"skip", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_SKIP, INT_MIN, INT_MAX, V|D, "debug"},
 567 {"startcode", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_STARTCODE, INT_MIN, INT_MAX, V|D, "debug"},
 568 {"pts", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_PTS, INT_MIN, INT_MAX, V|D, "debug"},
 569 {"er", "error resilience", 0, FF_OPT_TYPE_CONST, FF_DEBUG_ER, INT_MIN, INT_MAX, V|D, "debug"},
 570 {"mmco", "memory management control operations (H.264)", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MMCO, INT_MIN, INT_MAX, V|D, "debug"},
 571 {"bugs", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_BUGS, INT_MIN, INT_MAX, V|D, "debug"},
 572 {"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"},
 573 {"vis_mb_type", "visualize block types", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},
 574 {"vismv", "visualize motion vectors (MVs)", OFFSET(debug_mv), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|D, "debug_mv"},
 575 {"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"},
 576 {"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"},
 577 {"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"},
 578 {"mb_qmin", "obsolete, use qmin", OFFSET(mb_qmin), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 579 {"mb_qmax", "obsolete, use qmax", OFFSET(mb_qmax), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 580 {"cmp", "full pel me compare function", OFFSET(me_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 581 {"subcmp", "sub pel me compare function", OFFSET(me_sub_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 582 {"mbcmp", "macroblock compare function", OFFSET(mb_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 583 {"ildctcmp", "interlaced dct compare function", OFFSET(ildct_cmp), FF_OPT_TYPE_INT, FF_CMP_VSAD, INT_MIN, INT_MAX, V|E, "cmp_func"},
 584 {"dia_size", "diamond type & size for motion estimation", OFFSET(dia_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 585 {"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},
 586 {"preme", "pre motion estimation", OFFSET(pre_me), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 587 {"precmp", "pre motion estimation compare function", OFFSET(me_pre_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 588 {"sad", "sum of absolute differences, fast (default)", 0, FF_OPT_TYPE_CONST, FF_CMP_SAD, INT_MIN, INT_MAX, V|E, "cmp_func"},
 589 {"sse", "sum of squared errors", 0, FF_OPT_TYPE_CONST, FF_CMP_SSE, INT_MIN, INT_MAX, V|E, "cmp_func"},
 590 {"satd", "sum of absolute Hadamard transformed differences", 0, FF_OPT_TYPE_CONST, FF_CMP_SATD, INT_MIN, INT_MAX, V|E, "cmp_func"},
 591 {"dct", "sum of absolute DCT transformed differences", 0, FF_OPT_TYPE_CONST, FF_CMP_DCT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 592 {"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"},
 593 {"bit", "number of bits needed for the block", 0, FF_OPT_TYPE_CONST, FF_CMP_BIT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 594 {"rd", "rate distortion optimal, slow", 0, FF_OPT_TYPE_CONST, FF_CMP_RD, INT_MIN, INT_MAX, V|E, "cmp_func"},
 595 {"zero", "0", 0, FF_OPT_TYPE_CONST, FF_CMP_ZERO, INT_MIN, INT_MAX, V|E, "cmp_func"},
 596 {"vsad", "sum of absolute vertical differences", 0, FF_OPT_TYPE_CONST, FF_CMP_VSAD, INT_MIN, INT_MAX, V|E, "cmp_func"},
 597 {"vsse","sum of squared vertical differences", 0, FF_OPT_TYPE_CONST, FF_CMP_VSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},
 598 {"nsse", "noise preserving sum of squared differences", 0, FF_OPT_TYPE_CONST, FF_CMP_NSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},
 599 #ifdef CONFIG_SNOW_ENCODER
 600 {"w53", "5/3 wavelet, only used in snow", 0, FF_OPT_TYPE_CONST, FF_CMP_W53, INT_MIN, INT_MAX, V|E, "cmp_func"},
 601 {"w97", "9/7 wavelet, only used in snow", 0, FF_OPT_TYPE_CONST, FF_CMP_W97, INT_MIN, INT_MAX, V|E, "cmp_func"},
 602 #endif
 603 {"dctmax", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_DCTMAX, INT_MIN, INT_MAX, V|E, "cmp_func"},
 604 {"chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_CHROMA, INT_MIN, INT_MAX, V|E, "cmp_func"},
 605 {"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},
 606 {"subq", "sub pel motion estimation quality", OFFSET(me_subpel_quality), FF_OPT_TYPE_INT, 8, INT_MIN, INT_MAX, V|E},
 607 {"dtg_active_format", NULL, OFFSET(dtg_active_format), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 608 {"me_range", "limit motion vectors range (1023 for DivX player)", OFFSET(me_range), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 609 {"ibias", "intra quant bias", OFFSET(intra_quant_bias), FF_OPT_TYPE_INT, FF_DEFAULT_QUANT_BIAS, INT_MIN, INT_MAX, V|E},
 610 {"pbias", "inter quant bias", OFFSET(inter_quant_bias), FF_OPT_TYPE_INT, FF_DEFAULT_QUANT_BIAS, INT_MIN, INT_MAX, V|E},
 611 {"color_table_id", NULL, OFFSET(color_table_id), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 612 {"internal_buffer_count", NULL, OFFSET(internal_buffer_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 613 {"global_quality", NULL, OFFSET(global_quality), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 614 {"coder", NULL, OFFSET(coder_type), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "coder"},
 615 {"vlc", "variable length coder / huffman coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_VLC, INT_MIN, INT_MAX, V|E, "coder"},
 616 {"ac", "arithmetic coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_AC, INT_MIN, INT_MAX, V|E, "coder"},
 617 {"raw", "raw (no encoding)", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_RAW, INT_MIN, INT_MAX, V|E, "coder"},
 618 {"rle", "run-length coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_RLE, INT_MIN, INT_MAX, V|E, "coder"},
 619 {"deflate", "deflate-based coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_DEFLATE, INT_MIN, INT_MAX, V|E, "coder"},
 620 {"context", "context model", OFFSET(context_model), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 621 {"slice_flags", NULL, OFFSET(slice_flags), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 622 {"xvmc_acceleration", NULL, OFFSET(xvmc_acceleration), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 623 {"mbd", "macroblock decision algorithm (high quality mode)", OFFSET(mb_decision), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "mbd"},
 624 {"simple", "use mbcmp (default)", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_SIMPLE, INT_MIN, INT_MAX, V|E, "mbd"},
 625 {"bits", "use fewest bits", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_BITS, INT_MIN, INT_MAX, V|E, "mbd"},
 626 {"rd", "use best rate distortion", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_RD, INT_MIN, INT_MAX, V|E, "mbd"},
 627 {"stream_codec_tag", NULL, OFFSET(stream_codec_tag), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 628 {"sc_threshold", "scene change threshold", OFFSET(scenechange_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 629 {"lmin", "min lagrange factor (VBR)", OFFSET(lmin), FF_OPT_TYPE_INT,  2*FF_QP2LAMBDA, 0, INT_MAX, V|E},
 630 {"lmax", "max lagrange factor (VBR)", OFFSET(lmax), FF_OPT_TYPE_INT, 31*FF_QP2LAMBDA, 0, INT_MAX, V|E},
 631 {"nr", "noise reduction", OFFSET(noise_reduction), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 632 {"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},
 633 {"inter_threshold", NULL, OFFSET(inter_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 634 {"flags2", NULL, OFFSET(flags2), FF_OPT_TYPE_FLAGS, CODEC_FLAG2_FASTPSKIP|CODEC_FLAG2_BIT_RESERVOIR, 0, UINT_MAX, V|A|E|D, "flags2"},
 635 {"error", NULL, OFFSET(error_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 636 {"antialias", "MP3 antialias algorithm", OFFSET(antialias_algo), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D, "aa"},
 637 {"auto", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_AUTO, INT_MIN, INT_MAX, V|D, "aa"},
 638 {"fastint", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_FASTINT, INT_MIN, INT_MAX, V|D, "aa"},
 639 {"int", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_INT, INT_MIN, INT_MAX, V|D, "aa"},
 640 {"float", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_FLOAT, INT_MIN, INT_MAX, V|D, "aa"},
 641 {"qns", "quantizer noise shaping", OFFSET(quantizer_noise_shaping), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 642 {"threads", NULL, OFFSET(thread_count), FF_OPT_TYPE_INT, 1, INT_MIN, INT_MAX, V|E|D},
 643 {"me_threshold", "motion estimaton threshold", OFFSET(me_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 644 {"mb_threshold", "macroblock threshold", OFFSET(mb_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 645 {"dc", "intra_dc_precision", OFFSET(intra_dc_precision), FF_OPT_TYPE_INT, 0, INT_MIN, INT_MAX, V|E},
 646 {"nssew", "nsse weight", OFFSET(nsse_weight), FF_OPT_TYPE_INT, 8, INT_MIN, INT_MAX, V|E},
 647 {"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},
 648 {"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},
 649 {"profile", NULL, OFFSET(profile), FF_OPT_TYPE_INT, FF_PROFILE_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "profile"},
 650 {"unknown", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "profile"},
 651 {"aac_main", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_AAC_MAIN, INT_MIN, INT_MAX, A|E, "profile"},
 652 {"aac_low", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_AAC_LOW, INT_MIN, INT_MAX, A|E, "profile"},
 653 {"aac_ssr", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_AAC_SSR, INT_MIN, INT_MAX, A|E, "profile"},
 654 {"aac_ltp", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_AAC_LTP, INT_MIN, INT_MAX, A|E, "profile"},
 655 {"level", NULL, OFFSET(level), FF_OPT_TYPE_INT, FF_LEVEL_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "level"},
 656 {"unknown", NULL, 0, FF_OPT_TYPE_CONST, FF_LEVEL_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "level"},
 657 {"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},
 658 {"skip_threshold", "frame skip threshold", OFFSET(frame_skip_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 659 {"skip_factor", "frame skip factor", OFFSET(frame_skip_factor), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 660 {"skip_exp", "frame skip exponent", OFFSET(frame_skip_exp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 661 {"skipcmp", "frame skip compare function", OFFSET(frame_skip_cmp), FF_OPT_TYPE_INT, FF_CMP_DCTMAX, INT_MIN, INT_MAX, V|E, "cmp_func"},
 662 {"border_mask", "increases the quantizer for macroblocks close to borders", OFFSET(border_masking), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},
 663 {"mblmin", "min macroblock lagrange factor (VBR)", OFFSET(mb_lmin), FF_OPT_TYPE_INT, FF_QP2LAMBDA * 2, 1, FF_LAMBDA_MAX, V|E},
 664 {"mblmax", "max macroblock lagrange factor (VBR)", OFFSET(mb_lmax), FF_OPT_TYPE_INT, FF_QP2LAMBDA * 31, 1, FF_LAMBDA_MAX, V|E},
 665 {"mepc", "motion estimation bitrate penalty compensation (1.0 = 256)", OFFSET(me_penalty_compensation), FF_OPT_TYPE_INT, 256, INT_MIN, INT_MAX, V|E},
 666 {"bidir_refine", "refine the two motion vectors used in bidirectional macroblocks", OFFSET(bidir_refine), FF_OPT_TYPE_INT, DEFAULT, 0, 4, V|E},
 667 {"brd_scale", "downscales frames for dynamic B-frame decision", OFFSET(brd_scale), FF_OPT_TYPE_INT, DEFAULT, 0, 10, V|E},
 668 {"crf", "enables constant quality mode, and selects the quality (x264)", OFFSET(crf), FF_OPT_TYPE_FLOAT, DEFAULT, 0, 51, V|E},
 669 {"cqp", "constant quantization parameter rate control method", OFFSET(cqp), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, V|E},
 670 {"keyint_min", "minimum interval between IDR-frames (x264)", OFFSET(keyint_min), FF_OPT_TYPE_INT, 25, INT_MIN, INT_MAX, V|E},
 671 {"refs", "reference frames to consider for motion compensation (Snow)", OFFSET(refs), FF_OPT_TYPE_INT, 1, INT_MIN, INT_MAX, V|E},
 672 {"chromaoffset", "chroma qp offset from luma", OFFSET(chromaoffset), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 673 {"bframebias", "influences how often B-frames are used", OFFSET(bframebias), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 674 {"trellis", "rate-distortion optimal quantization", OFFSET(trellis), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|A|E},
 675 {"directpred", "direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)", OFFSET(directpred), FF_OPT_TYPE_INT, 2, INT_MIN, INT_MAX, V|E},
 676 {"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"},
 677 {"wpred", "weighted biprediction for b-frames (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_WPRED, INT_MIN, INT_MAX, V|E, "flags2"},
 678 {"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"},
 679 {"dct8x8", "high profile 8x8 transform (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_8X8DCT, INT_MIN, INT_MAX, V|E, "flags2"},
 680 {"fastpskip", "fast pskip (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_FASTPSKIP, INT_MIN, INT_MAX, V|E, "flags2"},
 681 {"aud", "access unit delimiters (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_AUD, INT_MIN, INT_MAX, V|E, "flags2"},
 682 {"brdo", "b-frame rate-distortion optimization", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_BRDO, INT_MIN, INT_MAX, V|E, "flags2"},
 683 {"skiprd", "RD optimal MB level residual skipping", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_SKIP_RD, INT_MIN, INT_MAX, V|E, "flags2"},
 684 {"complexityblur", "reduce fluctuations in qp (before curve compression)", OFFSET(complexityblur), FF_OPT_TYPE_FLOAT, 20.0, FLT_MIN, FLT_MAX, V|E},
 685 {"deblockalpha", "in-loop deblocking filter alphac0 parameter", OFFSET(deblockalpha), FF_OPT_TYPE_INT, DEFAULT, -6, 6, V|E},
 686 {"deblockbeta", "in-loop deblocking filter beta parameter", OFFSET(deblockbeta), FF_OPT_TYPE_INT, DEFAULT, -6, 6, V|E},
 687 {"partitions", "macroblock subpartition sizes to consider", OFFSET(partitions), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, V|E, "partitions"},
 688 {"parti4x4", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_I4X4, INT_MIN, INT_MAX, V|E, "partitions"},
 689 {"parti8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_I8X8, INT_MIN, INT_MAX, V|E, "partitions"},
 690 {"partp4x4", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_P4X4, INT_MIN, INT_MAX, V|E, "partitions"},
 691 {"partp8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_P8X8, INT_MIN, INT_MAX, V|E, "partitions"},
 692 {"partb8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_B8X8, INT_MIN, INT_MAX, V|E, "partitions"},
 693 {"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},
 694 {"mv0_threshold", NULL, OFFSET(mv0_threshold), FF_OPT_TYPE_INT, 256, 0, INT_MAX, V|E},
 695 {"ivlc", "intra vlc table", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_INTRA_VLC, INT_MIN, INT_MAX, V|E, "flags2"},
 696 {"b_sensitivity", "adjusts sensitivity of b_frame_strategy 1", OFFSET(b_sensitivity), FF_OPT_TYPE_INT, 40, 1, INT_MAX, V|E},
 697 {"compression_level", NULL, OFFSET(compression_level), FF_OPT_TYPE_INT, FF_COMPRESSION_DEFAULT, INT_MIN, INT_MAX, V|A|E},
 698 {"use_lpc", "sets whether to use LPC mode (FLAC)", OFFSET(use_lpc), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 699 {"lpc_coeff_precision", "LPC coefficient precision (FLAC)", OFFSET(lpc_coeff_precision), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|E},
 700 {"min_prediction_order", NULL, OFFSET(min_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 701 {"max_prediction_order", NULL, OFFSET(max_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 702 {"prediction_order_method", "search method for selecting prediction order", OFFSET(prediction_order_method), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 703 {"min_partition_order", NULL, OFFSET(min_partition_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 704 {"max_partition_order", NULL, OFFSET(max_partition_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 705 {"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},
 706 {"drop_frame_timecode", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_DROP_FRAME_TIMECODE, INT_MIN, INT_MAX, V|E, "flags2"},
 707 {"non_linear_q", "use non linear quantizer", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_NON_LINEAR_QUANT, INT_MIN, INT_MAX, V|E, "flags2"},
 708 {"request_channels", "set desired number of audio channels", OFFSET(request_channels), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|D},
 709 {"drc_scale", "percentage of dynamic range compression to apply", OFFSET(drc_scale), FF_OPT_TYPE_FLOAT, 1.0, 0.0, 1.0, A|D},
 710 {"reservoir", "use bit reservoir", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_BIT_RESERVOIR, INT_MIN, INT_MAX, A|E, "flags2"},
 711 {NULL},
 712 };
 713
 714 #undef A
 715 #undef V
 716 #undef S
 717 #undef E
 718 #undef D
 719 #undef DEFAULT
 720
 721 static const AVClass av_codec_context_class = { "AVCodecContext", context_to_name, options };
 722
 723 void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType codec_type){
 724     int flags=0;
 725     memset(s, 0, sizeof(AVCodecContext));
 726
 727     s->av_class= &av_codec_context_class;
 728
 729     s->codec_type = codec_type;
 730     if(codec_type == CODEC_TYPE_AUDIO)
 731         flags= AV_OPT_FLAG_AUDIO_PARAM;
 732     else if(codec_type == CODEC_TYPE_VIDEO)
 733         flags= AV_OPT_FLAG_VIDEO_PARAM;
 734     else if(codec_type == CODEC_TYPE_SUBTITLE)
 735         flags= AV_OPT_FLAG_SUBTITLE_PARAM;
 736     av_opt_set_defaults2(s, flags, flags);
 737
 738     s->rc_eq= "tex^qComp";
 739     s->time_base= (AVRational){0,1};
 740     s->get_buffer= avcodec_default_get_buffer;
 741     s->release_buffer= avcodec_default_release_buffer;
 742     s->get_format= avcodec_default_get_format;
 743     s->execute= avcodec_default_execute;
 744     s->sample_aspect_ratio= (AVRational){0,1};
 745     s->pix_fmt= PIX_FMT_NONE;
 746     s->sample_fmt= SAMPLE_FMT_S16; // FIXME: set to NONE
 747
 748     s->palctrl = NULL;
 749     s->reget_buffer= avcodec_default_reget_buffer;
 750 }
 751
 752 AVCodecContext *avcodec_alloc_context2(enum CodecType codec_type){
 753     AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
 754
 755     if(avctx==NULL) return NULL;
 756
 757     avcodec_get_context_defaults2(avctx, codec_type);
 758
 759     return avctx;
 760 }
 761
 762 void avcodec_get_context_defaults(AVCodecContext *s){
 763     avcodec_get_context_defaults2(s, CODEC_TYPE_UNKNOWN);
 764 }
 765
 766 AVCodecContext *avcodec_alloc_context(void){
 767     return avcodec_alloc_context2(CODEC_TYPE_UNKNOWN);
 768 }
 769
 770 void avcodec_get_frame_defaults(AVFrame *pic){
 771     memset(pic, 0, sizeof(AVFrame));
 772
 773     pic->pts= AV_NOPTS_VALUE;
 774     pic->key_frame= 1;
 775 }
 776
 777 AVFrame *avcodec_alloc_frame(void){
 778     AVFrame *pic= av_malloc(sizeof(AVFrame));
 779
 780     if(pic==NULL) return NULL;
 781
 782     avcodec_get_frame_defaults(pic);
 783
 784     return pic;
 785 }
 786
 787 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
 788 {
 789     int ret= -1;
 790
 791     entangled_thread_counter++;
 792     if(entangled_thread_counter != 1){
 793         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
 794         goto end;
 795     }
 796
 797     if(avctx->codec || !codec)
 798         goto end;
 799
 800     if (codec->priv_data_size > 0) {
 801         avctx->priv_data = av_mallocz(codec->priv_data_size);
 802         if (!avctx->priv_data) {
 803             ret = AVERROR(ENOMEM);
 804             goto end;
 805         }
 806     } else {
 807         avctx->priv_data = NULL;
 808     }
 809
 810     if(avctx->coded_width && avctx->coded_height)
 811         avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
 812     else if(avctx->width && avctx->height)
 813         avcodec_set_dimensions(avctx, avctx->width, avctx->height);
 814
 815     if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
 816         av_freep(&avctx->priv_data);
 817         ret = AVERROR(EINVAL);
 818         goto end;
 819     }
 820
 821     avctx->codec = codec;
 822     avctx->codec_id = codec->id;
 823     avctx->frame_number = 0;
 824     if(avctx->codec->init){
 825         ret = avctx->codec->init(avctx);
 826         if (ret < 0) {
 827             av_freep(&avctx->priv_data);
 828             avctx->codec= NULL;
 829             goto end;
 830         }
 831     }
 832     ret=0;
 833 end:
 834     entangled_thread_counter--;
 835     return ret;
 836 }
 837
 838 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 839                          const short *samples)
 840 {
 841     if(buf_size < FF_MIN_BUFFER_SIZE && 0){
 842         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
 843         return -1;
 844     }
 845     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
 846         int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
 847         avctx->frame_number++;
 848         return ret;
 849     }else
 850         return 0;
 851 }
 852
 853 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 854                          const AVFrame *pict)
 855 {
 856     if(buf_size < FF_MIN_BUFFER_SIZE){
 857         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
 858         return -1;
 859     }
 860     if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
 861         return -1;
 862     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
 863         int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
 864         avctx->frame_number++;
 865         emms_c(); //needed to avoid an emms_c() call before every return;
 866
 867         return ret;
 868     }else
 869         return 0;
 870 }
 871
 872 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 873                             const AVSubtitle *sub)
 874 {
 875     int ret;
 876     ret = avctx->codec->encode(avctx, buf, buf_size, (void *)sub);
 877     avctx->frame_number++;
 878     return ret;
 879 }
 880
 881 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
 882                          int *got_picture_ptr,
 883                          const uint8_t *buf, int buf_size)
 884 {
 885     int ret;
 886
 887     *got_picture_ptr= 0;
 888     if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
 889         return -1;
 890     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
 891         ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
 892                                 buf, buf_size);
 893
 894         emms_c(); //needed to avoid an emms_c() call before every return;
 895
 896         if (*got_picture_ptr)
 897             avctx->frame_number++;
 898     }else
 899         ret= 0;
 900
 901     return ret;
 902 }
 903
 904 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
 905                          int *frame_size_ptr,
 906                          const uint8_t *buf, int buf_size)
 907 {
 908     int ret;
 909
 910     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
 911         //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
 912         if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
 913             av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
 914             return -1;
 915         }
 916         if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
 917         *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
 918             av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
 919             return -1;
 920         }
 921
 922         ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
 923                                 buf, buf_size);
 924         avctx->frame_number++;
 925     }else{
 926         ret= 0;
 927         *frame_size_ptr=0;
 928     }
 929     return ret;
 930 }
 931
 932 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
 933 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
 934                          int *frame_size_ptr,
 935                          const uint8_t *buf, int buf_size){
 936     *frame_size_ptr= AVCODEC_MAX_AUDIO_FRAME_SIZE;
 937     return avcodec_decode_audio2(avctx, samples, frame_size_ptr, buf, buf_size);
 938 }
 939 #endif
 940
 941 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
 942                             int *got_sub_ptr,
 943                             const uint8_t *buf, int buf_size)
 944 {
 945     int ret;
 946
 947     *got_sub_ptr = 0;
 948     ret = avctx->codec->decode(avctx, sub, got_sub_ptr,
 949                                buf, buf_size);
 950     if (*got_sub_ptr)
 951         avctx->frame_number++;
 952     return ret;
 953 }
 954
 955 int avcodec_close(AVCodecContext *avctx)
 956 {
 957     entangled_thread_counter++;
 958     if(entangled_thread_counter != 1){
 959         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
 960         entangled_thread_counter--;
 961         return -1;
 962     }
 963
 964     if (ENABLE_THREADS && avctx->thread_opaque)
 965         avcodec_thread_free(avctx);
 966     if (avctx->codec->close)
 967         avctx->codec->close(avctx);
 968     avcodec_default_free_buffers(avctx);
 969     av_freep(&avctx->priv_data);
 970     avctx->codec = NULL;
 971     entangled_thread_counter--;
 972     return 0;
 973 }
 974
 975 AVCodec *avcodec_find_encoder(enum CodecID id)
 976 {
 977     AVCodec *p;
 978     p = first_avcodec;
 979     while (p) {
 980         if (p->encode != NULL && p->id == id)
 981             return p;
 982         p = p->next;
 983     }
 984     return NULL;
 985 }
 986
 987 AVCodec *avcodec_find_encoder_by_name(const char *name)
 988 {
 989     AVCodec *p;
 990     p = first_avcodec;
 991     while (p) {
 992         if (p->encode != NULL && strcmp(name,p->name) == 0)
 993             return p;
 994         p = p->next;
 995     }
 996     return NULL;
 997 }
 998
 999 AVCodec *avcodec_find_decoder(enum CodecID id)
1000 {
1001     AVCodec *p;
1002     p = first_avcodec;
1003     while (p) {
1004         if (p->decode != NULL && p->id == id)
1005             return p;
1006         p = p->next;
1007     }
1008     return NULL;
1009 }
1010
1011 AVCodec *avcodec_find_decoder_by_name(const char *name)
1012 {
1013     AVCodec *p;
1014     p = first_avcodec;
1015     while (p) {
1016         if (p->decode != NULL && strcmp(name,p->name) == 0)
1017             return p;
1018         p = p->next;
1019     }
1020     return NULL;
1021 }
1022
1023 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1024 {
1025     const char *codec_name;
1026     AVCodec *p;
1027     char buf1[32];
1028     char channels_str[100];
1029     int bitrate;
1030     AVRational display_aspect_ratio;
1031
1032     if (encode)
1033         p = avcodec_find_encoder(enc->codec_id);
1034     else
1035         p = avcodec_find_decoder(enc->codec_id);
1036
1037     if (p) {
1038         codec_name = p->name;
1039         if (!encode && enc->codec_id == CODEC_ID_MP3) {
1040             if (enc->sub_id == 2)
1041                 codec_name = "mp2";
1042             else if (enc->sub_id == 1)
1043                 codec_name = "mp1";
1044         }
1045     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
1046         /* fake mpeg2 transport stream codec (currently not
1047            registered) */
1048         codec_name = "mpeg2ts";
1049     } else if (enc->codec_name[0] != '\0') {
1050         codec_name = enc->codec_name;
1051     } else {
1052         /* output avi tags */
1053         if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
1054            && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
1055             snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
1056                      enc->codec_tag & 0xff,
1057                      (enc->codec_tag >> 8) & 0xff,
1058                      (enc->codec_tag >> 16) & 0xff,
1059                      (enc->codec_tag >> 24) & 0xff,
1060                       enc->codec_tag);
1061         } else {
1062             snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
1063         }
1064         codec_name = buf1;
1065     }
1066
1067     switch(enc->codec_type) {
1068     case CODEC_TYPE_VIDEO:
1069         snprintf(buf, buf_size,
1070                  "Video: %s%s",
1071                  codec_name, enc->mb_decision ? " (hq)" : "");
1072         if (enc->pix_fmt != PIX_FMT_NONE) {
1073             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1074                      ", %s",
1075                      avcodec_get_pix_fmt_name(enc->pix_fmt));
1076         }
1077         if (enc->width) {
1078             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1079                      ", %dx%d",
1080                      enc->width, enc->height);
1081             if (enc->sample_aspect_ratio.num) {
1082                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1083                           enc->width*enc->sample_aspect_ratio.num,
1084                           enc->height*enc->sample_aspect_ratio.den,
1085                           1024*1024);
1086                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1087                          " [PAR %d:%d DAR %d:%d]",
1088                          enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1089                          display_aspect_ratio.num, display_aspect_ratio.den);
1090             }
1091             if(av_log_get_level() >= AV_LOG_DEBUG){
1092                 int g= ff_gcd(enc->time_base.num, enc->time_base.den);
1093                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1094                      ", %d/%d",
1095                      enc->time_base.num/g, enc->time_base.den/g);
1096             }
1097         }
1098         if (encode) {
1099             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1100                      ", q=%d-%d", enc->qmin, enc->qmax);
1101         }
1102         bitrate = enc->bit_rate;
1103         break;
1104     case CODEC_TYPE_AUDIO:
1105         snprintf(buf, buf_size,
1106                  "Audio: %s",
1107                  codec_name);
1108         switch (enc->channels) {
1109             case 1:
1110                 strcpy(channels_str, "mono");
1111                 break;
1112             case 2:
1113                 strcpy(channels_str, "stereo");
1114                 break;
1115             case 6:
1116                 strcpy(channels_str, "5:1");
1117                 break;
1118             default:
1119                 snprintf(channels_str, sizeof(channels_str), "%d channels", enc->channels);
1120                 break;
1121         }
1122         if (enc->sample_rate) {
1123             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1124                      ", %d Hz, %s",
1125                      enc->sample_rate,
1126                      channels_str);
1127         }
1128
1129         /* for PCM codecs, compute bitrate directly */
1130         switch(enc->codec_id) {
1131         case CODEC_ID_PCM_S32LE:
1132         case CODEC_ID_PCM_S32BE:
1133         case CODEC_ID_PCM_U32LE:
1134         case CODEC_ID_PCM_U32BE:
1135             bitrate = enc->sample_rate * enc->channels * 32;
1136             break;
1137         case CODEC_ID_PCM_S24LE:
1138         case CODEC_ID_PCM_S24BE:
1139         case CODEC_ID_PCM_U24LE:
1140         case CODEC_ID_PCM_U24BE:
1141         case CODEC_ID_PCM_S24DAUD:
1142             bitrate = enc->sample_rate * enc->channels * 24;
1143             break;
1144         case CODEC_ID_PCM_S16LE:
1145         case CODEC_ID_PCM_S16BE:
1146         case CODEC_ID_PCM_S16LE_PLANAR:
1147         case CODEC_ID_PCM_U16LE:
1148         case CODEC_ID_PCM_U16BE:
1149             bitrate = enc->sample_rate * enc->channels * 16;
1150             break;
1151         case CODEC_ID_PCM_S8:
1152         case CODEC_ID_PCM_U8:
1153         case CODEC_ID_PCM_ALAW:
1154         case CODEC_ID_PCM_MULAW:
1155             bitrate = enc->sample_rate * enc->channels * 8;
1156             break;
1157         default:
1158             bitrate = enc->bit_rate;
1159             break;
1160         }
1161         break;
1162     case CODEC_TYPE_DATA:
1163         snprintf(buf, buf_size, "Data: %s", codec_name);
1164         bitrate = enc->bit_rate;
1165         break;
1166     case CODEC_TYPE_SUBTITLE:
1167         snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1168         bitrate = enc->bit_rate;
1169         break;
1170     case CODEC_TYPE_ATTACHMENT:
1171         snprintf(buf, buf_size, "Attachment: %s", codec_name);
1172         bitrate = enc->bit_rate;
1173         break;
1174     default:
1175         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1176         return;
1177     }
1178     if (encode) {
1179         if (enc->flags & CODEC_FLAG_PASS1)
1180             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1181                      ", pass 1");
1182         if (enc->flags & CODEC_FLAG_PASS2)
1183             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1184                      ", pass 2");
1185     }
1186     if (bitrate != 0) {
1187         snprintf(buf + strlen(buf), buf_size - strlen(buf),
1188                  ", %d kb/s", bitrate / 1000);
1189     }
1190 }
1191
1192 unsigned avcodec_version( void )
1193 {
1194   return LIBAVCODEC_VERSION_INT;
1195 }
1196
1197 unsigned avcodec_build( void )
1198 {
1199   return LIBAVCODEC_BUILD;
1200 }
1201
1202 void avcodec_init(void)
1203 {
1204     static int initialized = 0;
1205
1206     if (initialized != 0)
1207         return;
1208     initialized = 1;
1209
1210     dsputil_static_init();
1211 }
1212
1213 void avcodec_flush_buffers(AVCodecContext *avctx)
1214 {
1215     if(avctx->codec->flush)
1216         avctx->codec->flush(avctx);
1217 }
1218
1219 void avcodec_default_free_buffers(AVCodecContext *s){
1220     int i, j;
1221
1222     if(s->internal_buffer==NULL) return;
1223
1224     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
1225         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
1226         for(j=0; j<4; j++){
1227             av_freep(&buf->base[j]);
1228             buf->data[j]= NULL;
1229         }
1230     }
1231     av_freep(&s->internal_buffer);
1232
1233     s->internal_buffer_count=0;
1234 }
1235
1236 char av_get_pict_type_char(int pict_type){
1237     switch(pict_type){
1238     case FF_I_TYPE: return 'I';
1239     case FF_P_TYPE: return 'P';
1240     case FF_B_TYPE: return 'B';
1241     case FF_S_TYPE: return 'S';
1242     case FF_SI_TYPE:return 'i';
1243     case FF_SP_TYPE:return 'p';
1244     case FF_BI_TYPE:return 'b';
1245     default:        return '?';
1246     }
1247 }
1248
1249 int av_get_bits_per_sample(enum CodecID codec_id){
1250     switch(codec_id){
1251     case CODEC_ID_ADPCM_SBPRO_2:
1252         return 2;
1253     case CODEC_ID_ADPCM_SBPRO_3:
1254         return 3;
1255     case CODEC_ID_ADPCM_SBPRO_4:
1256     case CODEC_ID_ADPCM_CT:
1257         return 4;
1258     case CODEC_ID_PCM_ALAW:
1259     case CODEC_ID_PCM_MULAW:
1260     case CODEC_ID_PCM_S8:
1261     case CODEC_ID_PCM_U8:
1262         return 8;
1263     case CODEC_ID_PCM_S16BE:
1264     case CODEC_ID_PCM_S16LE:
1265     case CODEC_ID_PCM_S16LE_PLANAR:
1266     case CODEC_ID_PCM_U16BE:
1267     case CODEC_ID_PCM_U16LE:
1268         return 16;
1269     case CODEC_ID_PCM_S24DAUD:
1270     case CODEC_ID_PCM_S24BE:
1271     case CODEC_ID_PCM_S24LE:
1272     case CODEC_ID_PCM_U24BE:
1273     case CODEC_ID_PCM_U24LE:
1274         return 24;
1275     case CODEC_ID_PCM_S32BE:
1276     case CODEC_ID_PCM_S32LE:
1277     case CODEC_ID_PCM_U32BE:
1278     case CODEC_ID_PCM_U32LE:
1279         return 32;
1280     default:
1281         return 0;
1282     }
1283 }
1284
1285 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
1286     switch (sample_fmt) {
1287     case SAMPLE_FMT_U8:
1288         return 8;
1289     case SAMPLE_FMT_S16:
1290         return 16;
1291     case SAMPLE_FMT_S24:
1292         return 24;
1293     case SAMPLE_FMT_S32:
1294     case SAMPLE_FMT_FLT:
1295         return 32;
1296     default:
1297         return 0;
1298     }
1299 }
1300
1301 #if !defined(HAVE_THREADS)
1302 int avcodec_thread_init(AVCodecContext *s, int thread_count){
1303     return -1;
1304 }
1305 #endif
1306
1307 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1308 {
1309     unsigned int n = 0;
1310
1311     while(v >= 0xff) {
1312         *s++ = 0xff;
1313         v -= 0xff;
1314         n++;
1315     }
1316     *s = v;
1317     n++;
1318     return n;
1319 }
1320
1321 /* Wrapper to work around the lack of mkstemp() on mingw/cygin.
1322  * Also, tries to create file in /tmp first, if possible.
1323  * *prefix can be a character constant; *filename will be allocated internally.
1324  * Returns file descriptor of opened file (or -1 on error)
1325  * and opened file name in **filename. */
1326 int av_tempfile(char *prefix, char **filename) {
1327     int fd=-1;
1328 #if !defined(HAVE_MKSTEMP)
1329     *filename = tempnam(".", prefix);
1330 #else
1331     size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
1332     *filename = av_malloc(len);
1333 #endif
1334     /* -----common section-----*/
1335     if (*filename == NULL) {
1336         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
1337         return -1;
1338     }
1339 #if !defined(HAVE_MKSTEMP)
1340     fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
1341 #else
1342     snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
1343     fd = mkstemp(*filename);
1344     if (fd < 0) {
1345         snprintf(*filename, len, "./%sXXXXXX", prefix);
1346         fd = mkstemp(*filename);
1347     }
1348 #endif
1349     /* -----common section-----*/
1350     if (fd < 0) {
1351         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
1352         return -1;
1353     }
1354     return fd; /* success */
1355 }
1356
1357 typedef struct {
1358     const char *abbr;
1359     int width, height;
1360 } VideoFrameSizeAbbr;
1361
1362 typedef struct {
1363     const char *abbr;
1364     int rate_num, rate_den;
1365 } VideoFrameRateAbbr;
1366
1367 static VideoFrameSizeAbbr video_frame_size_abbrs[] = {
1368     { "ntsc",      720, 480 },
1369     { "pal",       720, 576 },
1370     { "qntsc",     352, 240 }, /* VCD compliant NTSC */
1371     { "qpal",      352, 288 }, /* VCD compliant PAL */
1372     { "sntsc",     640, 480 }, /* square pixel NTSC */
1373     { "spal",      768, 576 }, /* square pixel PAL */
1374     { "film",      352, 240 },
1375     { "ntsc-film", 352, 240 },
1376     { "sqcif",     128,  96 },
1377     { "qcif",      176, 144 },
1378     { "cif",       352, 288 },
1379     { "4cif",      704, 576 },
1380     { "qqvga",     160, 120 },
1381     { "qvga",      320, 240 },
1382     { "vga",       640, 480 },
1383     { "svga",      800, 600 },
1384     { "xga",      1024, 768 },
1385     { "uxga",     1600,1200 },
1386     { "qxga",     2048,1536 },
1387     { "sxga",     1280,1024 },
1388     { "qsxga",    2560,2048 },
1389     { "hsxga",    5120,4096 },
1390     { "wvga",      852, 480 },
1391     { "wxga",     1366, 768 },
1392     { "wsxga",    1600,1024 },
1393     { "wuxga",    1920,1200 },
1394     { "woxga",    2560,1600 },
1395     { "wqsxga",   3200,2048 },
1396     { "wquxga",   3840,2400 },
1397     { "whsxga",   6400,4096 },
1398     { "whuxga",   7680,4800 },
1399     { "cga",       320, 200 },
1400     { "ega",       640, 350 },
1401     { "hd480",     852, 480 },
1402     { "hd720",    1280, 720 },
1403     { "hd1080",   1920,1080 },
1404 };
1405
1406 static VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1407     { "ntsc",      30000, 1001 },
1408     { "pal",          25,    1 },
1409     { "qntsc",     30000, 1001 }, /* VCD compliant NTSC */
1410     { "qpal",         25,    1 }, /* VCD compliant PAL */
1411     { "sntsc",     30000, 1001 }, /* square pixel NTSC */
1412     { "spal",         25,    1 }, /* square pixel PAL */
1413     { "film",         24,    1 },
1414     { "ntsc-film", 24000, 1001 },
1415 };
1416
1417 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1418 {
1419     int i;
1420     int n = sizeof(video_frame_size_abbrs) / sizeof(VideoFrameSizeAbbr);
1421     const char *p;
1422     int frame_width = 0, frame_height = 0;
1423
1424     for(i=0;i<n;i++) {
1425         if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1426             frame_width = video_frame_size_abbrs[i].width;
1427             frame_height = video_frame_size_abbrs[i].height;
1428             break;
1429         }
1430     }
1431     if (i == n) {
1432         p = str;
1433         frame_width = strtol(p, (char **)&p, 10);
1434         if (*p)
1435             p++;
1436         frame_height = strtol(p, (char **)&p, 10);
1437     }
1438     if (frame_width <= 0 || frame_height <= 0)
1439         return -1;
1440     *width_ptr = frame_width;
1441     *height_ptr = frame_height;
1442     return 0;
1443 }
1444
1445 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1446 {
1447     int i;
1448     int n = sizeof(video_frame_rate_abbrs) / sizeof(VideoFrameRateAbbr);
1449     char* cp;
1450
1451     /* First, we check our abbreviation table */
1452     for (i = 0; i < n; ++i)
1453          if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1454              frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1455              frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1456              return 0;
1457          }
1458
1459     /* Then, we try to parse it as fraction */
1460     cp = strchr(arg, '/');
1461     if (!cp)
1462         cp = strchr(arg, ':');
1463     if (cp) {
1464         char* cpp;
1465         frame_rate->num = strtol(arg, &cpp, 10);
1466         if (cpp != arg || cpp == cp)
1467             frame_rate->den = strtol(cp+1, &cpp, 10);
1468         else
1469            frame_rate->num = 0;
1470     }
1471     else {
1472         /* Finally we give up and parse it as double */
1473         AVRational time_base = av_d2q(strtod(arg, 0), DEFAULT_FRAME_RATE_BASE);
1474         frame_rate->den = time_base.den;
1475         frame_rate->num = time_base.num;
1476     }
1477     if (!frame_rate->num || !frame_rate->den)
1478         return -1;
1479     else
1480         return 0;
1481 }