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 /* needed for mkstemp() */
  29 #define _XOPEN_SOURCE 600
  30
  31 #include "libavutil/integer.h"
  32 #include "libavutil/crc.h"
  33 #include "avcodec.h"
  34 #include "dsputil.h"
  35 #include "opt.h"
  36 #include "imgconvert.h"
  37 #include "audioconvert.h"
  38 #include <stdlib.h>
  39 #include <stdarg.h>
  40 #include <limits.h>
  41 #include <float.h>
  42 #if !defined(HAVE_MKSTEMP)
  43 #include <fcntl.h>
  44 #endif
  45
  46 const uint8_t ff_reverse[256]={
  47 0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
  48 0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
  49 0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
  50 0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
  51 0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
  52 0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
  53 0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
  54 0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
  55 0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
  56 0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
  57 0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
  58 0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
  59 0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
  60 0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
  61 0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
  62 0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
  63 };
  64
  65 static int volatile entangled_thread_counter=0;
  66
  67 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
  68 {
  69     if(min_size < *size)
  70         return ptr;
  71
  72     *size= FFMAX(17*min_size/16 + 32, min_size);
  73
  74     ptr= av_realloc(ptr, *size);
  75     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
  76         *size= 0;
  77
  78     return ptr;
  79 }
  80
  81 /* encoder management */
  82 static AVCodec *first_avcodec = NULL;
  83
  84 AVCodec *av_codec_next(AVCodec *c){
  85     if(c) return c->next;
  86     else  return first_avcodec;
  87 }
  88
  89 void register_avcodec(AVCodec *format)
  90 {
  91     AVCodec **p;
  92     p = &first_avcodec;
  93     while (*p != NULL) p = &(*p)->next;
  94     *p = format;
  95     format->next = NULL;
  96 }
  97
  98 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
  99     s->coded_width = width;
 100     s->coded_height= height;
 101     s->width = -((-width )>>s->lowres);
 102     s->height= -((-height)>>s->lowres);
 103 }
 104
 105 typedef struct InternalBuffer{
 106     int last_pic_num;
 107     uint8_t *base[4];
 108     uint8_t *data[4];
 109     int linesize[4];
 110     int width, height;
 111     enum PixelFormat pix_fmt;
 112 }InternalBuffer;
 113
 114 #define INTERNAL_BUFFER_SIZE 32
 115
 116 #define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
 117
 118 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
 119     int w_align= 1;
 120     int h_align= 1;
 121
 122     switch(s->pix_fmt){
 123     case PIX_FMT_YUV420P:
 124     case PIX_FMT_YUYV422:
 125     case PIX_FMT_UYVY422:
 126     case PIX_FMT_YUV422P:
 127     case PIX_FMT_YUV444P:
 128     case PIX_FMT_GRAY8:
 129     case PIX_FMT_GRAY16BE:
 130     case PIX_FMT_GRAY16LE:
 131     case PIX_FMT_YUVJ420P:
 132     case PIX_FMT_YUVJ422P:
 133     case PIX_FMT_YUVJ444P:
 134     case PIX_FMT_YUVA420P:
 135         w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
 136         h_align= 16;
 137         break;
 138     case PIX_FMT_YUV411P:
 139     case PIX_FMT_UYYVYY411:
 140         w_align=32;
 141         h_align=8;
 142         break;
 143     case PIX_FMT_YUV410P:
 144         if(s->codec_id == CODEC_ID_SVQ1){
 145             w_align=64;
 146             h_align=64;
 147         }
 148     case PIX_FMT_RGB555:
 149         if(s->codec_id == CODEC_ID_RPZA){
 150             w_align=4;
 151             h_align=4;
 152         }
 153     case PIX_FMT_PAL8:
 154         if(s->codec_id == CODEC_ID_SMC){
 155             w_align=4;
 156             h_align=4;
 157         }
 158         break;
 159     case PIX_FMT_BGR24:
 160         if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
 161             w_align=4;
 162             h_align=4;
 163         }
 164         break;
 165     default:
 166         w_align= 1;
 167         h_align= 1;
 168         break;
 169     }
 170
 171     *width = ALIGN(*width , w_align);
 172     *height= ALIGN(*height, h_align);
 173     if(s->codec_id == CODEC_ID_H264)
 174         *height+=2; // some of the optimized chroma MC reads one line too much
 175 }
 176
 177 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
 178     if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/4)
 179         return 0;
 180
 181     av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
 182     return -1;
 183 }
 184
 185 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
 186     int i;
 187     int w= s->width;
 188     int h= s->height;
 189     InternalBuffer *buf;
 190     int *picture_number;
 191
 192     if(pic->data[0]!=NULL) {
 193         av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
 194         return -1;
 195     }
 196     if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
 197         av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
 198         return -1;
 199     }
 200
 201     if(avcodec_check_dimensions(s,w,h))
 202         return -1;
 203
 204     if(s->internal_buffer==NULL){
 205         s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
 206     }
 207 #if 0
 208     s->internal_buffer= av_fast_realloc(
 209         s->internal_buffer,
 210         &s->internal_buffer_size,
 211         sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
 212         );
 213 #endif
 214
 215     buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
 216     picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
 217     (*picture_number)++;
 218
 219     if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
 220         for(i=0; i<4; i++){
 221             av_freep(&buf->base[i]);
 222             buf->data[i]= NULL;
 223         }
 224     }
 225
 226     if(buf->base[0]){
 227         pic->age= *picture_number - buf->last_pic_num;
 228         buf->last_pic_num= *picture_number;
 229     }else{
 230         int h_chroma_shift, v_chroma_shift;
 231         int size[4] = {0};
 232         int tmpsize;
 233         AVPicture picture;
 234         int stride_align[4];
 235
 236         avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
 237
 238         avcodec_align_dimensions(s, &w, &h);
 239
 240         if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
 241             w+= EDGE_WIDTH*2;
 242             h+= EDGE_WIDTH*2;
 243         }
 244
 245         ff_fill_linesize(&picture, s->pix_fmt, w);
 246
 247         for (i=0; i<4; i++){
 248 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
 249 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
 250 //picture size unneccessarily in some cases. The solution here is not
 251 //pretty and better ideas are welcome!
 252 #ifdef HAVE_MMX
 253             if(s->codec_id == CODEC_ID_SVQ1)
 254                 stride_align[i]= 16;
 255             else
 256 #endif
 257             stride_align[i] = STRIDE_ALIGN;
 258             picture.linesize[i] = ALIGN(picture.linesize[i], stride_align[i]);
 259         }
 260
 261         tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
 262
 263         for (i=0; i<3 && picture.data[i+1]; i++)
 264             size[i] = picture.data[i+1] - picture.data[i];
 265         size[i] = tmpsize - (picture.data[i] - picture.data[0]);
 266
 267         buf->last_pic_num= -256*256*256*64;
 268         memset(buf->base, 0, sizeof(buf->base));
 269         memset(buf->data, 0, sizeof(buf->data));
 270
 271         for(i=0; i<4 && size[i]; i++){
 272             const int h_shift= i==0 ? 0 : h_chroma_shift;
 273             const int v_shift= i==0 ? 0 : v_chroma_shift;
 274
 275             buf->linesize[i]= picture.linesize[i];
 276
 277             buf->base[i]= av_malloc(size[i]+16); //FIXME 16
 278             if(buf->base[i]==NULL) return -1;
 279             memset(buf->base[i], 128, size[i]);
 280
 281             // no edge if EDEG EMU or not planar YUV, we check for PAL8 redundantly to protect against a exploitable bug regression ...
 282             if((s->flags&CODEC_FLAG_EMU_EDGE) || (s->pix_fmt == PIX_FMT_PAL8) || !size[2])
 283                 buf->data[i] = buf->base[i];
 284             else
 285                 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
 286         }
 287         buf->width  = s->width;
 288         buf->height = s->height;
 289         buf->pix_fmt= s->pix_fmt;
 290         pic->age= 256*256*256*64;
 291     }
 292     pic->type= FF_BUFFER_TYPE_INTERNAL;
 293
 294     for(i=0; i<4; i++){
 295         pic->base[i]= buf->base[i];
 296         pic->data[i]= buf->data[i];
 297         pic->linesize[i]= buf->linesize[i];
 298     }
 299     s->internal_buffer_count++;
 300
 301     pic->reordered_opaque= s->reordered_opaque;
 302
 303     if(s->debug&FF_DEBUG_BUFFERS)
 304         av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
 305
 306     return 0;
 307 }
 308
 309 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
 310     int i;
 311     InternalBuffer *buf, *last;
 312
 313     assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
 314     assert(s->internal_buffer_count);
 315
 316     buf = NULL; /* avoids warning */
 317     for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
 318         buf= &((InternalBuffer*)s->internal_buffer)[i];
 319         if(buf->data[0] == pic->data[0])
 320             break;
 321     }
 322     assert(i < s->internal_buffer_count);
 323     s->internal_buffer_count--;
 324     last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
 325
 326     FFSWAP(InternalBuffer, *buf, *last);
 327
 328     for(i=0; i<4; i++){
 329         pic->data[i]=NULL;
 330 //        pic->base[i]=NULL;
 331     }
 332 //printf("R%X\n", pic->opaque);
 333
 334     if(s->debug&FF_DEBUG_BUFFERS)
 335         av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
 336 }
 337
 338 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
 339     AVFrame temp_pic;
 340     int i;
 341
 342     /* If no picture return a new buffer */
 343     if(pic->data[0] == NULL) {
 344         /* We will copy from buffer, so must be readable */
 345         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
 346         return s->get_buffer(s, pic);
 347     }
 348
 349     /* If internal buffer type return the same buffer */
 350     if(pic->type == FF_BUFFER_TYPE_INTERNAL)
 351         return 0;
 352
 353     /*
 354      * Not internal type and reget_buffer not overridden, emulate cr buffer
 355      */
 356     temp_pic = *pic;
 357     for(i = 0; i < 4; i++)
 358         pic->data[i] = pic->base[i] = NULL;
 359     pic->opaque = NULL;
 360     /* Allocate new frame */
 361     if (s->get_buffer(s, pic))
 362         return -1;
 363     /* Copy image data from old buffer to new buffer */
 364     av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
 365              s->height);
 366     s->release_buffer(s, &temp_pic); // Release old frame
 367     return 0;
 368 }
 369
 370 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
 371     int i;
 372
 373     for(i=0; i<count; i++){
 374         int r= func(c, arg[i]);
 375         if(ret) ret[i]= r;
 376     }
 377     return 0;
 378 }
 379
 380 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
 381     return fmt[0];
 382 }
 383
 384 static const char* context_to_name(void* ptr) {
 385     AVCodecContext *avc= ptr;
 386
 387     if(avc && avc->codec && avc->codec->name)
 388         return avc->codec->name;
 389     else
 390         return "NULL";
 391 }
 392
 393 #define OFFSET(x) offsetof(AVCodecContext,x)
 394 #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
 395 //these names are too long to be readable
 396 #define V AV_OPT_FLAG_VIDEO_PARAM
 397 #define A AV_OPT_FLAG_AUDIO_PARAM
 398 #define S AV_OPT_FLAG_SUBTITLE_PARAM
 399 #define E AV_OPT_FLAG_ENCODING_PARAM
 400 #define D AV_OPT_FLAG_DECODING_PARAM
 401
 402 #define AV_CODEC_DEFAULT_BITRATE 200*1000
 403
 404 static const AVOption options[]={
 405 {"b", "set bitrate (in bits/s)", OFFSET(bit_rate), FF_OPT_TYPE_INT, AV_CODEC_DEFAULT_BITRATE, INT_MIN, INT_MAX, V|E},
 406 {"ab", "set bitrate (in bits/s)", OFFSET(bit_rate), FF_OPT_TYPE_INT, 64*1000, INT_MIN, INT_MAX, A|E},
 407 {"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},
 408 {"flags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, 0, UINT_MAX, V|A|E|D, "flags"},
 409 {"mv4", "use four motion vector by macroblock (mpeg4)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_4MV, INT_MIN, INT_MAX, V|E, "flags"},
 410 {"obmc", "use overlapped block motion compensation (h263+)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_OBMC, INT_MIN, INT_MAX, V|E, "flags"},
 411 {"qpel", "use 1/4 pel motion compensation", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QPEL, INT_MIN, INT_MAX, V|E, "flags"},
 412 {"loop", "use loop filter", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_LOOP_FILTER, INT_MIN, INT_MAX, V|E, "flags"},
 413 {"qscale", "use fixed qscale", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QSCALE, INT_MIN, INT_MAX, 0, "flags"},
 414 {"gmc", "use gmc", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GMC, INT_MIN, INT_MAX, V|E, "flags"},
 415 {"mv0", "always try a mb with mv=<0,0>", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_MV0, INT_MIN, INT_MAX, V|E, "flags"},
 416 {"part", "use data partitioning", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PART, INT_MIN, INT_MAX, V|E, "flags"},
 417 {"input_preserved", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INPUT_PRESERVED, INT_MIN, INT_MAX, 0, "flags"},
 418 {"pass1", "use internal 2pass ratecontrol in first  pass mode", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PASS1, INT_MIN, INT_MAX, 0, "flags"},
 419 {"pass2", "use internal 2pass ratecontrol in second pass mode", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PASS2, INT_MIN, INT_MAX, 0, "flags"},
 420 {"extern_huff", "use external huffman table (for mjpeg)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_EXTERN_HUFF, INT_MIN, INT_MAX, 0, "flags"},
 421 {"gray", "only decode/encode grayscale", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GRAY, INT_MIN, INT_MAX, V|E|D, "flags"},
 422 {"emu_edge", "don't draw edges", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_EMU_EDGE, INT_MIN, INT_MAX, 0, "flags"},
 423 {"psnr", "error[?] variables will be set during encoding", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PSNR, INT_MIN, INT_MAX, V|E, "flags"},
 424 {"truncated", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_TRUNCATED, INT_MIN, INT_MAX, 0, "flags"},
 425 {"naq", "normalize adaptive quantization", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_NORMALIZE_AQP, INT_MIN, INT_MAX, V|E, "flags"},
 426 {"ildct", "use interlaced dct", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INTERLACED_DCT, INT_MIN, INT_MAX, V|E, "flags"},
 427 {"low_delay", "force low delay", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_LOW_DELAY, INT_MIN, INT_MAX, V|D|E, "flags"},
 428 {"alt", "enable alternate scantable (mpeg2/mpeg4)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_ALT_SCAN, INT_MIN, INT_MAX, V|E, "flags"},
 429 {"global_header", "place global headers in extradata instead of every keyframe", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GLOBAL_HEADER, INT_MIN, INT_MAX, V|A|E, "flags"},
 430 {"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"},
 431 {"aic", "h263 advanced intra coding / mpeg4 ac prediction", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_AC_PRED, INT_MIN, INT_MAX, V|E, "flags"},
 432 {"umv", "use unlimited motion vectors", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_UMV, INT_MIN, INT_MAX, V|E, "flags"},
 433 {"cbp", "use rate distortion optimization for cbp", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_CBP_RD, INT_MIN, INT_MAX, V|E, "flags"},
 434 {"qprd", "use rate distortion optimization for qp selection", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QP_RD, INT_MIN, INT_MAX, V|E, "flags"},
 435 {"aiv", "h263 alternative inter vlc", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_AIV, INT_MIN, INT_MAX, V|E, "flags"},
 436 {"slice", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_SLICE_STRUCT, INT_MIN, INT_MAX, V|E, "flags"},
 437 {"ilme", "interlaced motion estimation", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INTERLACED_ME, INT_MIN, INT_MAX, V|E, "flags"},
 438 {"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"},
 439 {"cgop", "closed gop", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_CLOSED_GOP, INT_MIN, INT_MAX, V|E, "flags"},
 440 {"fast", "allow non spec compliant speedup tricks", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_FAST, INT_MIN, INT_MAX, V|E, "flags2"},
 441 {"sgop", "strictly enforce gop size", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_STRICT_GOP, INT_MIN, INT_MAX, V|E, "flags2"},
 442 {"noout", "skip bitstream encoding", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_NO_OUTPUT, INT_MIN, INT_MAX, V|E, "flags2"},
 443 {"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"},
 444 {"sub_id", NULL, OFFSET(sub_id), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 445 {"me_method", "set motion estimation method", OFFSET(me_method), FF_OPT_TYPE_INT, ME_EPZS, INT_MIN, INT_MAX, V|E, "me_method"},
 446 {"zero", "zero motion estimation (fastest)", 0, FF_OPT_TYPE_CONST, ME_ZERO, INT_MIN, INT_MAX, V|E, "me_method" },
 447 {"full", "full motion estimation (slowest)", 0, FF_OPT_TYPE_CONST, ME_FULL, INT_MIN, INT_MAX, V|E, "me_method" },
 448 {"epzs", "EPZS motion estimation (default)", 0, FF_OPT_TYPE_CONST, ME_EPZS, INT_MIN, INT_MAX, V|E, "me_method" },
 449 {"esa", "esa motion estimation (alias for full)", 0, FF_OPT_TYPE_CONST, ME_FULL, INT_MIN, INT_MAX, V|E, "me_method" },
 450 {"tesa", "tesa motion estimation", 0, FF_OPT_TYPE_CONST, ME_TESA, INT_MIN, INT_MAX, V|E, "me_method" },
 451 {"dia", "dia motion estimation (alias for epzs)", 0, FF_OPT_TYPE_CONST, ME_EPZS, INT_MIN, INT_MAX, V|E, "me_method" },
 452 {"log", "log motion estimation", 0, FF_OPT_TYPE_CONST, ME_LOG, INT_MIN, INT_MAX, V|E, "me_method" },
 453 {"phods", "phods motion estimation", 0, FF_OPT_TYPE_CONST, ME_PHODS, INT_MIN, INT_MAX, V|E, "me_method" },
 454 {"x1", "X1 motion estimation", 0, FF_OPT_TYPE_CONST, ME_X1, INT_MIN, INT_MAX, V|E, "me_method" },
 455 {"hex", "hex motion estimation", 0, FF_OPT_TYPE_CONST, ME_HEX, INT_MIN, INT_MAX, V|E, "me_method" },
 456 {"umh", "umh motion estimation", 0, FF_OPT_TYPE_CONST, ME_UMH, INT_MIN, INT_MAX, V|E, "me_method" },
 457 {"iter", "iter motion estimation", 0, FF_OPT_TYPE_CONST, ME_ITER, INT_MIN, INT_MAX, V|E, "me_method" },
 458 {"extradata_size", NULL, OFFSET(extradata_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 459 {"time_base", NULL, OFFSET(time_base), FF_OPT_TYPE_RATIONAL, DEFAULT, INT_MIN, INT_MAX},
 460 {"g", "set the group of picture size", OFFSET(gop_size), FF_OPT_TYPE_INT, 12, INT_MIN, INT_MAX, V|E},
 461 {"rate_emu", "frame rate emulation", OFFSET(rate_emu), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 462 {"ar", "set audio sampling rate (in Hz)", OFFSET(sample_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 463 {"ac", "set number of audio channels", OFFSET(channels), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 464 {"cutoff", "set cutoff bandwidth", OFFSET(cutoff), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|E},
 465 {"frame_size", NULL, OFFSET(frame_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|E},
 466 {"frame_number", NULL, OFFSET(frame_number), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 467 {"real_pict_num", NULL, OFFSET(real_pict_num), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 468 {"delay", NULL, OFFSET(delay), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 469 {"qcomp", "video quantizer scale compression (VBR)", OFFSET(qcompress), FF_OPT_TYPE_FLOAT, 0.5, -FLT_MAX, FLT_MAX, V|E},
 470 {"qblur", "video quantizer scale blur (VBR)", OFFSET(qblur), FF_OPT_TYPE_FLOAT, 0.5, 0, FLT_MAX, V|E},
 471 {"qmin", "min video quantizer scale (VBR)", OFFSET(qmin), FF_OPT_TYPE_INT, 2, 1, 51, V|E},
 472 {"qmax", "max video quantizer scale (VBR)", OFFSET(qmax), FF_OPT_TYPE_INT, 31, 1, 51, V|E},
 473 {"qdiff", "max difference between the quantizer scale (VBR)", OFFSET(max_qdiff), FF_OPT_TYPE_INT, 3, INT_MIN, INT_MAX, V|E},
 474 {"bf", "use 'frames' B frames", OFFSET(max_b_frames), FF_OPT_TYPE_INT, DEFAULT, 0, FF_MAX_B_FRAMES, V|E},
 475 {"b_qfactor", "qp factor between p and b frames", OFFSET(b_quant_factor), FF_OPT_TYPE_FLOAT, 1.25, -FLT_MAX, FLT_MAX, V|E},
 476 {"rc_strategy", "ratecontrol method", OFFSET(rc_strategy), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 477 {"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},
 478 {"hurry_up", NULL, OFFSET(hurry_up), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D},
 479 {"ps", "rtp payload size in bits", OFFSET(rtp_payload_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 480 {"mv_bits", NULL, OFFSET(mv_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 481 {"header_bits", NULL, OFFSET(header_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 482 {"i_tex_bits", NULL, OFFSET(i_tex_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 483 {"p_tex_bits", NULL, OFFSET(p_tex_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 484 {"i_count", NULL, OFFSET(i_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 485 {"p_count", NULL, OFFSET(p_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 486 {"skip_count", NULL, OFFSET(skip_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 487 {"misc_bits", NULL, OFFSET(misc_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 488 {"frame_bits", NULL, OFFSET(frame_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 489 {"codec_tag", NULL, OFFSET(codec_tag), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 490 {"bug", "workaround not auto detected encoder bugs", OFFSET(workaround_bugs), FF_OPT_TYPE_FLAGS, FF_BUG_AUTODETECT, INT_MIN, INT_MAX, V|D, "bug"},
 491 {"autodetect", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AUTODETECT, INT_MIN, INT_MAX, V|D, "bug"},
 492 {"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"},
 493 {"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"},
 494 {"ump4", "(autodetected if fourcc==UMP4)", 0, FF_OPT_TYPE_CONST, FF_BUG_UMP4, INT_MIN, INT_MAX, V|D, "bug"},
 495 {"no_padding", "padding bug (autodetected)", 0, FF_OPT_TYPE_CONST, FF_BUG_NO_PADDING, INT_MIN, INT_MAX, V|D, "bug"},
 496 {"amv", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AMV, INT_MIN, INT_MAX, V|D, "bug"},
 497 {"ac_vlc", "illegal vlc bug (autodetected per fourcc)", 0, FF_OPT_TYPE_CONST, FF_BUG_AC_VLC, INT_MIN, INT_MAX, V|D, "bug"},
 498 {"qpel_chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_QPEL_CHROMA, INT_MIN, INT_MAX, V|D, "bug"},
 499 {"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"},
 500 {"qpel_chroma2", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_QPEL_CHROMA2, INT_MIN, INT_MAX, V|D, "bug"},
 501 {"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"},
 502 {"edge", "edge padding bug (autodetected per fourcc/version)", 0, FF_OPT_TYPE_CONST, FF_BUG_EDGE, INT_MIN, INT_MAX, V|D, "bug"},
 503 {"hpel_chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_HPEL_CHROMA, INT_MIN, INT_MAX, V|D, "bug"},
 504 {"dc_clip", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_DC_CLIP, INT_MIN, INT_MAX, V|D, "bug"},
 505 {"ms", "workaround various bugs in microsofts broken decoders", 0, FF_OPT_TYPE_CONST, FF_BUG_MS, INT_MIN, INT_MAX, V|D, "bug"},
 506 {"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},
 507 {"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},
 508 {"strict", "how strictly to follow the standards", OFFSET(strict_std_compliance), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|V|D|E, "strict"},
 509 {"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|D|E, "strict"},
 510 {"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|D|E, "strict"},
 511 {"normal", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_NORMAL, INT_MIN, INT_MAX, V|D|E, "strict"},
 512 {"inofficial", "allow inofficial extensions", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_INOFFICIAL, INT_MIN, INT_MAX, V|D|E, "strict"},
 513 {"experimental", "allow non standardized experimental things", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_EXPERIMENTAL, INT_MIN, INT_MAX, V|D|E, "strict"},
 514 {"b_qoffset", "qp offset between P and B frames", OFFSET(b_quant_offset), FF_OPT_TYPE_FLOAT, 1.25, -FLT_MAX, FLT_MAX, V|E},
 515 {"er", "set error detection aggressivity", OFFSET(error_recognition), FF_OPT_TYPE_INT, FF_ER_CAREFUL, INT_MIN, INT_MAX, A|V|D, "er"},
 516 {"careful", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_CAREFUL, INT_MIN, INT_MAX, V|D, "er"},
 517 {"compliant", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_COMPLIANT, INT_MIN, INT_MAX, V|D, "er"},
 518 {"aggressive", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_AGGRESSIVE, INT_MIN, INT_MAX, V|D, "er"},
 519 {"very_aggressive", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_VERY_AGGRESSIVE, INT_MIN, INT_MAX, V|D, "er"},
 520 {"has_b_frames", NULL, OFFSET(has_b_frames), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 521 {"block_align", NULL, OFFSET(block_align), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 522 {"parse_only", NULL, OFFSET(parse_only), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 523 {"mpeg_quant", "use MPEG quantizers instead of H.263", OFFSET(mpeg_quant), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 524 {"stats_out", NULL, OFFSET(stats_out), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX},
 525 {"stats_in", NULL, OFFSET(stats_in), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX},
 526 {"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},
 527 {"rc_qmod_amp", "experimental quantizer modulation", OFFSET(rc_qmod_amp), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},
 528 {"rc_qmod_freq", "experimental quantizer modulation", OFFSET(rc_qmod_freq), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 529 {"rc_override_count", NULL, OFFSET(rc_override_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 530 {"rc_eq", "set rate control equation", OFFSET(rc_eq), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX, V|E},
 531 {"maxrate", "set max video bitrate tolerance (in bits/s)", OFFSET(rc_max_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 532 {"minrate", "set min video bitrate tolerance (in bits/s)", OFFSET(rc_min_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 533 {"bufsize", "set ratecontrol buffer size (in bits)", OFFSET(rc_buffer_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|V|E},
 534 {"rc_buf_aggressivity", "currently useless", OFFSET(rc_buffer_aggressivity), FF_OPT_TYPE_FLOAT, 1.0, -FLT_MAX, FLT_MAX, V|E},
 535 {"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},
 536 {"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},
 537 {"rc_init_cplx", "initial complexity for 1-pass encoding", OFFSET(rc_initial_cplx), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},
 538 {"dct", "DCT algorithm", OFFSET(dct_algo), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|E, "dct"},
 539 {"auto", "autoselect a good one (default)", 0, FF_OPT_TYPE_CONST, FF_DCT_AUTO, INT_MIN, INT_MAX, V|E, "dct"},
 540 {"fastint", "fast integer", 0, FF_OPT_TYPE_CONST, FF_DCT_FASTINT, INT_MIN, INT_MAX, V|E, "dct"},
 541 {"int", "accurate integer", 0, FF_OPT_TYPE_CONST, FF_DCT_INT, INT_MIN, INT_MAX, V|E, "dct"},
 542 {"mmx", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_MMX, INT_MIN, INT_MAX, V|E, "dct"},
 543 {"mlib", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_MLIB, INT_MIN, INT_MAX, V|E, "dct"},
 544 {"altivec", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_ALTIVEC, INT_MIN, INT_MAX, V|E, "dct"},
 545 {"faan", "floating point AAN DCT", 0, FF_OPT_TYPE_CONST, FF_DCT_FAAN, INT_MIN, INT_MAX, V|E, "dct"},
 546 {"lumi_mask", "compresses bright areas stronger than medium ones", OFFSET(lumi_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
 547 {"tcplx_mask", "temporal complexity masking", OFFSET(temporal_cplx_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
 548 {"scplx_mask", "spatial complexity masking", OFFSET(spatial_cplx_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
 549 {"p_mask", "inter masking", OFFSET(p_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
 550 {"dark_mask", "compresses dark areas stronger than medium ones", OFFSET(dark_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},
 551 {"idct", "select IDCT implementation", OFFSET(idct_algo), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|E|D, "idct"},
 552 {"auto", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_AUTO, INT_MIN, INT_MAX, V|E|D, "idct"},
 553 {"int", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_INT, INT_MIN, INT_MAX, V|E|D, "idct"},
 554 {"simple", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLE, INT_MIN, INT_MAX, V|E|D, "idct"},
 555 {"simplemmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEMMX, INT_MIN, INT_MAX, V|E|D, "idct"},
 556 {"libmpeg2mmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_LIBMPEG2MMX, INT_MIN, INT_MAX, V|E|D, "idct"},
 557 {"ps2", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_PS2, INT_MIN, INT_MAX, V|E|D, "idct"},
 558 {"mlib", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_MLIB, INT_MIN, INT_MAX, V|E|D, "idct"},
 559 {"arm", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_ARM, INT_MIN, INT_MAX, V|E|D, "idct"},
 560 {"altivec", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_ALTIVEC, INT_MIN, INT_MAX, V|E|D, "idct"},
 561 {"sh4", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SH4, INT_MIN, INT_MAX, V|E|D, "idct"},
 562 {"simplearm", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEARM, INT_MIN, INT_MAX, V|E|D, "idct"},
 563 {"simplearmv5te", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEARMV5TE, INT_MIN, INT_MAX, V|E|D, "idct"},
 564 {"simplearmv6", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEARMV6, INT_MIN, INT_MAX, V|E|D, "idct"},
 565 {"h264", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_H264, INT_MIN, INT_MAX, V|E|D, "idct"},
 566 {"vp3", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_VP3, INT_MIN, INT_MAX, V|E|D, "idct"},
 567 {"ipp", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_IPP, INT_MIN, INT_MAX, V|E|D, "idct"},
 568 {"xvidmmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_XVIDMMX, INT_MIN, INT_MAX, V|E|D, "idct"},
 569 {"faani", "floating point AAN IDCT", 0, FF_OPT_TYPE_CONST, FF_IDCT_FAAN, INT_MIN, INT_MAX, V|D|E, "idct"},
 570 {"slice_count", NULL, OFFSET(slice_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 571 {"ec", "set error concealment strategy", OFFSET(error_concealment), FF_OPT_TYPE_FLAGS, 3, INT_MIN, INT_MAX, V|D, "ec"},
 572 {"guess_mvs", "iterative motion vector (MV) search (slow)", 0, FF_OPT_TYPE_CONST, FF_EC_GUESS_MVS, INT_MIN, INT_MAX, V|D, "ec"},
 573 {"deblock", "use strong deblock filter for damaged MBs", 0, FF_OPT_TYPE_CONST, FF_EC_DEBLOCK, INT_MIN, INT_MAX, V|D, "ec"},
 574 {"bits_per_coded_sample", NULL, OFFSET(bits_per_coded_sample), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 575 {"pred", "prediction method", OFFSET(prediction_method), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "pred"},
 576 {"left", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_LEFT, INT_MIN, INT_MAX, V|E, "pred"},
 577 {"plane", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_PLANE, INT_MIN, INT_MAX, V|E, "pred"},
 578 {"median", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_MEDIAN, INT_MIN, INT_MAX, V|E, "pred"},
 579 {"aspect", "sample aspect ratio", OFFSET(sample_aspect_ratio), FF_OPT_TYPE_RATIONAL, DEFAULT, 0, 10, V|E},
 580 {"debug", "print specific debug info", OFFSET(debug), FF_OPT_TYPE_FLAGS, DEFAULT, 0, INT_MAX, V|A|S|E|D, "debug"},
 581 {"pict", "picture info", 0, FF_OPT_TYPE_CONST, FF_DEBUG_PICT_INFO, INT_MIN, INT_MAX, V|D, "debug"},
 582 {"rc", "rate control", 0, FF_OPT_TYPE_CONST, FF_DEBUG_RC, INT_MIN, INT_MAX, V|E, "debug"},
 583 {"bitstream", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_BITSTREAM, INT_MIN, INT_MAX, V|D, "debug"},
 584 {"mb_type", "macroblock (MB) type", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},
 585 {"qp", "per-block quantization parameter (QP)", 0, FF_OPT_TYPE_CONST, FF_DEBUG_QP, INT_MIN, INT_MAX, V|D, "debug"},
 586 {"mv", "motion vector", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MV, INT_MIN, INT_MAX, V|D, "debug"},
 587 {"dct_coeff", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_DCT_COEFF, INT_MIN, INT_MAX, V|D, "debug"},
 588 {"skip", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_SKIP, INT_MIN, INT_MAX, V|D, "debug"},
 589 {"startcode", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_STARTCODE, INT_MIN, INT_MAX, V|D, "debug"},
 590 {"pts", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_PTS, INT_MIN, INT_MAX, V|D, "debug"},
 591 {"er", "error recognition", 0, FF_OPT_TYPE_CONST, FF_DEBUG_ER, INT_MIN, INT_MAX, V|D, "debug"},
 592 {"mmco", "memory management control operations (H.264)", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MMCO, INT_MIN, INT_MAX, V|D, "debug"},
 593 {"bugs", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_BUGS, INT_MIN, INT_MAX, V|D, "debug"},
 594 {"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"},
 595 {"vis_mb_type", "visualize block types", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},
 596 {"buffers", "picture buffer allocations", 0, FF_OPT_TYPE_CONST, FF_DEBUG_BUFFERS, INT_MIN, INT_MAX, V|D, "debug"},
 597 {"vismv", "visualize motion vectors (MVs)", OFFSET(debug_mv), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|D, "debug_mv"},
 598 {"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"},
 599 {"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"},
 600 {"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"},
 601 {"mb_qmin", "obsolete, use qmin", OFFSET(mb_qmin), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 602 {"mb_qmax", "obsolete, use qmax", OFFSET(mb_qmax), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 603 {"cmp", "full pel me compare function", OFFSET(me_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 604 {"subcmp", "sub pel me compare function", OFFSET(me_sub_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 605 {"mbcmp", "macroblock compare function", OFFSET(mb_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 606 {"ildctcmp", "interlaced dct compare function", OFFSET(ildct_cmp), FF_OPT_TYPE_INT, FF_CMP_VSAD, INT_MIN, INT_MAX, V|E, "cmp_func"},
 607 {"dia_size", "diamond type & size for motion estimation", OFFSET(dia_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 608 {"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},
 609 {"preme", "pre motion estimation", OFFSET(pre_me), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 610 {"precmp", "pre motion estimation compare function", OFFSET(me_pre_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 611 {"sad", "sum of absolute differences, fast (default)", 0, FF_OPT_TYPE_CONST, FF_CMP_SAD, INT_MIN, INT_MAX, V|E, "cmp_func"},
 612 {"sse", "sum of squared errors", 0, FF_OPT_TYPE_CONST, FF_CMP_SSE, INT_MIN, INT_MAX, V|E, "cmp_func"},
 613 {"satd", "sum of absolute Hadamard transformed differences", 0, FF_OPT_TYPE_CONST, FF_CMP_SATD, INT_MIN, INT_MAX, V|E, "cmp_func"},
 614 {"dct", "sum of absolute DCT transformed differences", 0, FF_OPT_TYPE_CONST, FF_CMP_DCT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 615 {"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"},
 616 {"bit", "number of bits needed for the block", 0, FF_OPT_TYPE_CONST, FF_CMP_BIT, INT_MIN, INT_MAX, V|E, "cmp_func"},
 617 {"rd", "rate distortion optimal, slow", 0, FF_OPT_TYPE_CONST, FF_CMP_RD, INT_MIN, INT_MAX, V|E, "cmp_func"},
 618 {"zero", "0", 0, FF_OPT_TYPE_CONST, FF_CMP_ZERO, INT_MIN, INT_MAX, V|E, "cmp_func"},
 619 {"vsad", "sum of absolute vertical differences", 0, FF_OPT_TYPE_CONST, FF_CMP_VSAD, INT_MIN, INT_MAX, V|E, "cmp_func"},
 620 {"vsse","sum of squared vertical differences", 0, FF_OPT_TYPE_CONST, FF_CMP_VSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},
 621 {"nsse", "noise preserving sum of squared differences", 0, FF_OPT_TYPE_CONST, FF_CMP_NSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},
 622 #ifdef CONFIG_SNOW_ENCODER
 623 {"w53", "5/3 wavelet, only used in snow", 0, FF_OPT_TYPE_CONST, FF_CMP_W53, INT_MIN, INT_MAX, V|E, "cmp_func"},
 624 {"w97", "9/7 wavelet, only used in snow", 0, FF_OPT_TYPE_CONST, FF_CMP_W97, INT_MIN, INT_MAX, V|E, "cmp_func"},
 625 #endif
 626 {"dctmax", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_DCTMAX, INT_MIN, INT_MAX, V|E, "cmp_func"},
 627 {"chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_CHROMA, INT_MIN, INT_MAX, V|E, "cmp_func"},
 628 {"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},
 629 {"subq", "sub pel motion estimation quality", OFFSET(me_subpel_quality), FF_OPT_TYPE_INT, 8, INT_MIN, INT_MAX, V|E},
 630 {"dtg_active_format", NULL, OFFSET(dtg_active_format), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 631 {"me_range", "limit motion vectors range (1023 for DivX player)", OFFSET(me_range), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 632 {"ibias", "intra quant bias", OFFSET(intra_quant_bias), FF_OPT_TYPE_INT, FF_DEFAULT_QUANT_BIAS, INT_MIN, INT_MAX, V|E},
 633 {"pbias", "inter quant bias", OFFSET(inter_quant_bias), FF_OPT_TYPE_INT, FF_DEFAULT_QUANT_BIAS, INT_MIN, INT_MAX, V|E},
 634 {"color_table_id", NULL, OFFSET(color_table_id), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 635 {"internal_buffer_count", NULL, OFFSET(internal_buffer_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 636 {"global_quality", NULL, OFFSET(global_quality), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 637 {"coder", NULL, OFFSET(coder_type), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "coder"},
 638 {"vlc", "variable length coder / huffman coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_VLC, INT_MIN, INT_MAX, V|E, "coder"},
 639 {"ac", "arithmetic coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_AC, INT_MIN, INT_MAX, V|E, "coder"},
 640 {"raw", "raw (no encoding)", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_RAW, INT_MIN, INT_MAX, V|E, "coder"},
 641 {"rle", "run-length coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_RLE, INT_MIN, INT_MAX, V|E, "coder"},
 642 {"deflate", "deflate-based coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_DEFLATE, INT_MIN, INT_MAX, V|E, "coder"},
 643 {"context", "context model", OFFSET(context_model), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 644 {"slice_flags", NULL, OFFSET(slice_flags), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 645 {"xvmc_acceleration", NULL, OFFSET(xvmc_acceleration), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 646 {"mbd", "macroblock decision algorithm (high quality mode)", OFFSET(mb_decision), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "mbd"},
 647 {"simple", "use mbcmp (default)", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_SIMPLE, INT_MIN, INT_MAX, V|E, "mbd"},
 648 {"bits", "use fewest bits", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_BITS, INT_MIN, INT_MAX, V|E, "mbd"},
 649 {"rd", "use best rate distortion", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_RD, INT_MIN, INT_MAX, V|E, "mbd"},
 650 {"stream_codec_tag", NULL, OFFSET(stream_codec_tag), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 651 {"sc_threshold", "scene change threshold", OFFSET(scenechange_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 652 {"lmin", "min lagrange factor (VBR)", OFFSET(lmin), FF_OPT_TYPE_INT,  2*FF_QP2LAMBDA, 0, INT_MAX, V|E},
 653 {"lmax", "max lagrange factor (VBR)", OFFSET(lmax), FF_OPT_TYPE_INT, 31*FF_QP2LAMBDA, 0, INT_MAX, V|E},
 654 {"nr", "noise reduction", OFFSET(noise_reduction), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 655 {"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},
 656 {"inter_threshold", NULL, OFFSET(inter_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 657 {"flags2", NULL, OFFSET(flags2), FF_OPT_TYPE_FLAGS, CODEC_FLAG2_FASTPSKIP|CODEC_FLAG2_BIT_RESERVOIR, 0, UINT_MAX, V|A|E|D, "flags2"},
 658 {"error", NULL, OFFSET(error_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 659 {"antialias", "MP3 antialias algorithm", OFFSET(antialias_algo), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D, "aa"},
 660 {"auto", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_AUTO, INT_MIN, INT_MAX, V|D, "aa"},
 661 {"fastint", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_FASTINT, INT_MIN, INT_MAX, V|D, "aa"},
 662 {"int", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_INT, INT_MIN, INT_MAX, V|D, "aa"},
 663 {"float", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_FLOAT, INT_MIN, INT_MAX, V|D, "aa"},
 664 {"qns", "quantizer noise shaping", OFFSET(quantizer_noise_shaping), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 665 {"threads", NULL, OFFSET(thread_count), FF_OPT_TYPE_INT, 1, INT_MIN, INT_MAX, V|E|D},
 666 {"me_threshold", "motion estimaton threshold", OFFSET(me_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 667 {"mb_threshold", "macroblock threshold", OFFSET(mb_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 668 {"dc", "intra_dc_precision", OFFSET(intra_dc_precision), FF_OPT_TYPE_INT, 0, INT_MIN, INT_MAX, V|E},
 669 {"nssew", "nsse weight", OFFSET(nsse_weight), FF_OPT_TYPE_INT, 8, INT_MIN, INT_MAX, V|E},
 670 {"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},
 671 {"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},
 672 {"profile", NULL, OFFSET(profile), FF_OPT_TYPE_INT, FF_PROFILE_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "profile"},
 673 {"unknown", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "profile"},
 674 {"aac_main", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_AAC_MAIN, INT_MIN, INT_MAX, A|E, "profile"},
 675 {"aac_low", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_AAC_LOW, INT_MIN, INT_MAX, A|E, "profile"},
 676 {"aac_ssr", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_AAC_SSR, INT_MIN, INT_MAX, A|E, "profile"},
 677 {"aac_ltp", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_AAC_LTP, INT_MIN, INT_MAX, A|E, "profile"},
 678 {"level", NULL, OFFSET(level), FF_OPT_TYPE_INT, FF_LEVEL_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "level"},
 679 {"unknown", NULL, 0, FF_OPT_TYPE_CONST, FF_LEVEL_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "level"},
 680 {"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},
 681 {"skip_threshold", "frame skip threshold", OFFSET(frame_skip_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 682 {"skip_factor", "frame skip factor", OFFSET(frame_skip_factor), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 683 {"skip_exp", "frame skip exponent", OFFSET(frame_skip_exp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 684 {"skipcmp", "frame skip compare function", OFFSET(frame_skip_cmp), FF_OPT_TYPE_INT, FF_CMP_DCTMAX, INT_MIN, INT_MAX, V|E, "cmp_func"},
 685 {"border_mask", "increases the quantizer for macroblocks close to borders", OFFSET(border_masking), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},
 686 {"mblmin", "min macroblock lagrange factor (VBR)", OFFSET(mb_lmin), FF_OPT_TYPE_INT, FF_QP2LAMBDA * 2, 1, FF_LAMBDA_MAX, V|E},
 687 {"mblmax", "max macroblock lagrange factor (VBR)", OFFSET(mb_lmax), FF_OPT_TYPE_INT, FF_QP2LAMBDA * 31, 1, FF_LAMBDA_MAX, V|E},
 688 {"mepc", "motion estimation bitrate penalty compensation (1.0 = 256)", OFFSET(me_penalty_compensation), FF_OPT_TYPE_INT, 256, INT_MIN, INT_MAX, V|E},
 689 {"skip_loop_filter", NULL, OFFSET(skip_loop_filter), FF_OPT_TYPE_INT, AVDISCARD_DEFAULT, INT_MIN, INT_MAX, V|D, "avdiscard"},
 690 {"skip_idct"       , NULL, OFFSET(skip_idct)       , FF_OPT_TYPE_INT, AVDISCARD_DEFAULT, INT_MIN, INT_MAX, V|D, "avdiscard"},
 691 {"skip_frame"      , NULL, OFFSET(skip_frame)      , FF_OPT_TYPE_INT, AVDISCARD_DEFAULT, INT_MIN, INT_MAX, V|D, "avdiscard"},
 692 {"none"            , NULL, 0, FF_OPT_TYPE_CONST, AVDISCARD_NONE   , INT_MIN, INT_MAX, V|D, "avdiscard"},
 693 {"default"         , NULL, 0, FF_OPT_TYPE_CONST, AVDISCARD_DEFAULT, INT_MIN, INT_MAX, V|D, "avdiscard"},
 694 {"noref"           , NULL, 0, FF_OPT_TYPE_CONST, AVDISCARD_NONREF , INT_MIN, INT_MAX, V|D, "avdiscard"},
 695 {"bidir"           , NULL, 0, FF_OPT_TYPE_CONST, AVDISCARD_BIDIR  , INT_MIN, INT_MAX, V|D, "avdiscard"},
 696 {"nokey"           , NULL, 0, FF_OPT_TYPE_CONST, AVDISCARD_NONKEY , INT_MIN, INT_MAX, V|D, "avdiscard"},
 697 {"all"             , NULL, 0, FF_OPT_TYPE_CONST, AVDISCARD_ALL    , INT_MIN, INT_MAX, V|D, "avdiscard"},
 698 {"bidir_refine", "refine the two motion vectors used in bidirectional macroblocks", OFFSET(bidir_refine), FF_OPT_TYPE_INT, DEFAULT, 0, 4, V|E},
 699 {"brd_scale", "downscales frames for dynamic B-frame decision", OFFSET(brd_scale), FF_OPT_TYPE_INT, DEFAULT, 0, 10, V|E},
 700 {"crf", "enables constant quality mode, and selects the quality (x264)", OFFSET(crf), FF_OPT_TYPE_FLOAT, DEFAULT, 0, 51, V|E},
 701 {"cqp", "constant quantization parameter rate control method", OFFSET(cqp), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, V|E},
 702 {"keyint_min", "minimum interval between IDR-frames (x264)", OFFSET(keyint_min), FF_OPT_TYPE_INT, 25, INT_MIN, INT_MAX, V|E},
 703 {"refs", "reference frames to consider for motion compensation (Snow)", OFFSET(refs), FF_OPT_TYPE_INT, 1, INT_MIN, INT_MAX, V|E},
 704 {"chromaoffset", "chroma qp offset from luma", OFFSET(chromaoffset), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 705 {"bframebias", "influences how often B-frames are used", OFFSET(bframebias), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},
 706 {"trellis", "rate-distortion optimal quantization", OFFSET(trellis), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|A|E},
 707 {"directpred", "direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal), 3 (auto)", OFFSET(directpred), FF_OPT_TYPE_INT, 2, INT_MIN, INT_MAX, V|E},
 708 {"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"},
 709 {"wpred", "weighted biprediction for b-frames (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_WPRED, INT_MIN, INT_MAX, V|E, "flags2"},
 710 {"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"},
 711 {"dct8x8", "high profile 8x8 transform (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_8X8DCT, INT_MIN, INT_MAX, V|E, "flags2"},
 712 {"fastpskip", "fast pskip (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_FASTPSKIP, INT_MIN, INT_MAX, V|E, "flags2"},
 713 {"aud", "access unit delimiters (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_AUD, INT_MIN, INT_MAX, V|E, "flags2"},
 714 {"skiprd", "RD optimal MB level residual skipping", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_SKIP_RD, INT_MIN, INT_MAX, V|E, "flags2"},
 715 {"complexityblur", "reduce fluctuations in qp (before curve compression)", OFFSET(complexityblur), FF_OPT_TYPE_FLOAT, 20.0, FLT_MIN, FLT_MAX, V|E},
 716 {"deblockalpha", "in-loop deblocking filter alphac0 parameter", OFFSET(deblockalpha), FF_OPT_TYPE_INT, DEFAULT, -6, 6, V|E},
 717 {"deblockbeta", "in-loop deblocking filter beta parameter", OFFSET(deblockbeta), FF_OPT_TYPE_INT, DEFAULT, -6, 6, V|E},
 718 {"partitions", "macroblock subpartition sizes to consider", OFFSET(partitions), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, V|E, "partitions"},
 719 {"parti4x4", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_I4X4, INT_MIN, INT_MAX, V|E, "partitions"},
 720 {"parti8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_I8X8, INT_MIN, INT_MAX, V|E, "partitions"},
 721 {"partp4x4", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_P4X4, INT_MIN, INT_MAX, V|E, "partitions"},
 722 {"partp8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_P8X8, INT_MIN, INT_MAX, V|E, "partitions"},
 723 {"partb8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_B8X8, INT_MIN, INT_MAX, V|E, "partitions"},
 724 {"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},
 725 {"mv0_threshold", NULL, OFFSET(mv0_threshold), FF_OPT_TYPE_INT, 256, 0, INT_MAX, V|E},
 726 {"ivlc", "intra vlc table", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_INTRA_VLC, INT_MIN, INT_MAX, V|E, "flags2"},
 727 {"b_sensitivity", "adjusts sensitivity of b_frame_strategy 1", OFFSET(b_sensitivity), FF_OPT_TYPE_INT, 40, 1, INT_MAX, V|E},
 728 {"compression_level", NULL, OFFSET(compression_level), FF_OPT_TYPE_INT, FF_COMPRESSION_DEFAULT, INT_MIN, INT_MAX, V|A|E},
 729 {"use_lpc", "sets whether to use LPC mode (FLAC)", OFFSET(use_lpc), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 730 {"lpc_coeff_precision", "LPC coefficient precision (FLAC)", OFFSET(lpc_coeff_precision), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|E},
 731 {"min_prediction_order", NULL, OFFSET(min_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 732 {"max_prediction_order", NULL, OFFSET(max_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 733 {"prediction_order_method", "search method for selecting prediction order", OFFSET(prediction_order_method), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 734 {"min_partition_order", NULL, OFFSET(min_partition_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 735 {"max_partition_order", NULL, OFFSET(max_partition_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},
 736 {"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},
 737 {"drop_frame_timecode", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_DROP_FRAME_TIMECODE, INT_MIN, INT_MAX, V|E, "flags2"},
 738 {"non_linear_q", "use non linear quantizer", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_NON_LINEAR_QUANT, INT_MIN, INT_MAX, V|E, "flags2"},
 739 {"request_channels", "set desired number of audio channels", OFFSET(request_channels), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|D},
 740 {"drc_scale", "percentage of dynamic range compression to apply", OFFSET(drc_scale), FF_OPT_TYPE_FLOAT, 1.0, 0.0, 1.0, A|D},
 741 {"reservoir", "use bit reservoir", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_BIT_RESERVOIR, INT_MIN, INT_MAX, A|E, "flags2"},
 742 {"bits_per_raw_sample", NULL, OFFSET(bits_per_raw_sample), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},
 743 {NULL},
 744 };
 745
 746 #undef A
 747 #undef V
 748 #undef S
 749 #undef E
 750 #undef D
 751 #undef DEFAULT
 752
 753 static const AVClass av_codec_context_class = { "AVCodecContext", context_to_name, options };
 754
 755 void avcodec_get_context_defaults2(AVCodecContext *s, enum CodecType codec_type){
 756     int flags=0;
 757     memset(s, 0, sizeof(AVCodecContext));
 758
 759     s->av_class= &av_codec_context_class;
 760
 761     s->codec_type = codec_type;
 762     if(codec_type == CODEC_TYPE_AUDIO)
 763         flags= AV_OPT_FLAG_AUDIO_PARAM;
 764     else if(codec_type == CODEC_TYPE_VIDEO)
 765         flags= AV_OPT_FLAG_VIDEO_PARAM;
 766     else if(codec_type == CODEC_TYPE_SUBTITLE)
 767         flags= AV_OPT_FLAG_SUBTITLE_PARAM;
 768     av_opt_set_defaults2(s, flags, flags);
 769
 770     s->time_base= (AVRational){0,1};
 771     s->get_buffer= avcodec_default_get_buffer;
 772     s->release_buffer= avcodec_default_release_buffer;
 773     s->get_format= avcodec_default_get_format;
 774     s->execute= avcodec_default_execute;
 775     s->sample_aspect_ratio= (AVRational){0,1};
 776     s->pix_fmt= PIX_FMT_NONE;
 777     s->sample_fmt= SAMPLE_FMT_S16; // FIXME: set to NONE
 778
 779     s->palctrl = NULL;
 780     s->reget_buffer= avcodec_default_reget_buffer;
 781 }
 782
 783 AVCodecContext *avcodec_alloc_context2(enum CodecType codec_type){
 784     AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
 785
 786     if(avctx==NULL) return NULL;
 787
 788     avcodec_get_context_defaults2(avctx, codec_type);
 789
 790     return avctx;
 791 }
 792
 793 void avcodec_get_context_defaults(AVCodecContext *s){
 794     avcodec_get_context_defaults2(s, CODEC_TYPE_UNKNOWN);
 795 }
 796
 797 AVCodecContext *avcodec_alloc_context(void){
 798     return avcodec_alloc_context2(CODEC_TYPE_UNKNOWN);
 799 }
 800
 801 void avcodec_get_frame_defaults(AVFrame *pic){
 802     memset(pic, 0, sizeof(AVFrame));
 803
 804     pic->pts= AV_NOPTS_VALUE;
 805     pic->key_frame= 1;
 806 }
 807
 808 AVFrame *avcodec_alloc_frame(void){
 809     AVFrame *pic= av_malloc(sizeof(AVFrame));
 810
 811     if(pic==NULL) return NULL;
 812
 813     avcodec_get_frame_defaults(pic);
 814
 815     return pic;
 816 }
 817
 818 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
 819 {
 820     int ret= -1;
 821
 822     entangled_thread_counter++;
 823     if(entangled_thread_counter != 1){
 824         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
 825         goto end;
 826     }
 827
 828     if(avctx->codec || !codec)
 829         goto end;
 830
 831     if (codec->priv_data_size > 0) {
 832         avctx->priv_data = av_mallocz(codec->priv_data_size);
 833         if (!avctx->priv_data) {
 834             ret = AVERROR(ENOMEM);
 835             goto end;
 836         }
 837     } else {
 838         avctx->priv_data = NULL;
 839     }
 840
 841     if(avctx->coded_width && avctx->coded_height)
 842         avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
 843     else if(avctx->width && avctx->height)
 844         avcodec_set_dimensions(avctx, avctx->width, avctx->height);
 845
 846     if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
 847         av_freep(&avctx->priv_data);
 848         ret = AVERROR(EINVAL);
 849         goto end;
 850     }
 851
 852     avctx->codec = codec;
 853     avctx->codec_id = codec->id;
 854     avctx->frame_number = 0;
 855     if(avctx->codec->init){
 856         ret = avctx->codec->init(avctx);
 857         if (ret < 0) {
 858             av_freep(&avctx->priv_data);
 859             avctx->codec= NULL;
 860             goto end;
 861         }
 862     }
 863     ret=0;
 864 end:
 865     entangled_thread_counter--;
 866     return ret;
 867 }
 868
 869 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 870                          const short *samples)
 871 {
 872     if(buf_size < FF_MIN_BUFFER_SIZE && 0){
 873         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
 874         return -1;
 875     }
 876     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
 877         int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
 878         avctx->frame_number++;
 879         return ret;
 880     }else
 881         return 0;
 882 }
 883
 884 int attribute_align_arg 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 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
 913                          int *got_picture_ptr,
 914                          const uint8_t *buf, int buf_size)
 915 {
 916     int ret;
 917
 918     *got_picture_ptr= 0;
 919     if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
 920         return -1;
 921     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
 922         ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
 923                                 buf, buf_size);
 924
 925         emms_c(); //needed to avoid an emms_c() call before every return;
 926
 927         if (*got_picture_ptr)
 928             avctx->frame_number++;
 929     }else
 930         ret= 0;
 931
 932     return ret;
 933 }
 934
 935 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
 936                          int *frame_size_ptr,
 937                          const uint8_t *buf, int buf_size)
 938 {
 939     int ret;
 940
 941     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
 942         //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
 943         if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
 944             av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
 945             return -1;
 946         }
 947         if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
 948         *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
 949             av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
 950             return -1;
 951         }
 952
 953         ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
 954                                 buf, buf_size);
 955         avctx->frame_number++;
 956     }else{
 957         ret= 0;
 958         *frame_size_ptr=0;
 959     }
 960     return ret;
 961 }
 962
 963 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
 964                             int *got_sub_ptr,
 965                             const uint8_t *buf, int buf_size)
 966 {
 967     int ret;
 968
 969     *got_sub_ptr = 0;
 970     ret = avctx->codec->decode(avctx, sub, got_sub_ptr,
 971                                buf, buf_size);
 972     if (*got_sub_ptr)
 973         avctx->frame_number++;
 974     return ret;
 975 }
 976
 977 int avcodec_close(AVCodecContext *avctx)
 978 {
 979     entangled_thread_counter++;
 980     if(entangled_thread_counter != 1){
 981         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
 982         entangled_thread_counter--;
 983         return -1;
 984     }
 985
 986     if (ENABLE_THREADS && avctx->thread_opaque)
 987         avcodec_thread_free(avctx);
 988     if (avctx->codec->close)
 989         avctx->codec->close(avctx);
 990     avcodec_default_free_buffers(avctx);
 991     av_freep(&avctx->priv_data);
 992     avctx->codec = NULL;
 993     entangled_thread_counter--;
 994     return 0;
 995 }
 996
 997 AVCodec *avcodec_find_encoder(enum CodecID id)
 998 {
 999     AVCodec *p;
1000     p = first_avcodec;
1001     while (p) {
1002         if (p->encode != NULL && p->id == id)
1003             return p;
1004         p = p->next;
1005     }
1006     return NULL;
1007 }
1008
1009 AVCodec *avcodec_find_encoder_by_name(const char *name)
1010 {
1011     AVCodec *p;
1012     if (!name)
1013         return NULL;
1014     p = first_avcodec;
1015     while (p) {
1016         if (p->encode != NULL && strcmp(name,p->name) == 0)
1017             return p;
1018         p = p->next;
1019     }
1020     return NULL;
1021 }
1022
1023 AVCodec *avcodec_find_decoder(enum CodecID id)
1024 {
1025     AVCodec *p;
1026     p = first_avcodec;
1027     while (p) {
1028         if (p->decode != NULL && p->id == id)
1029             return p;
1030         p = p->next;
1031     }
1032     return NULL;
1033 }
1034
1035 AVCodec *avcodec_find_decoder_by_name(const char *name)
1036 {
1037     AVCodec *p;
1038     if (!name)
1039         return NULL;
1040     p = first_avcodec;
1041     while (p) {
1042         if (p->decode != NULL && strcmp(name,p->name) == 0)
1043             return p;
1044         p = p->next;
1045     }
1046     return NULL;
1047 }
1048
1049 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1050 {
1051     const char *codec_name;
1052     AVCodec *p;
1053     char buf1[32];
1054     char channels_str[100];
1055     int bitrate;
1056     AVRational display_aspect_ratio;
1057
1058     if (encode)
1059         p = avcodec_find_encoder(enc->codec_id);
1060     else
1061         p = avcodec_find_decoder(enc->codec_id);
1062
1063     if (p) {
1064         codec_name = p->name;
1065         if (!encode && enc->codec_id == CODEC_ID_MP3) {
1066             if (enc->sub_id == 2)
1067                 codec_name = "mp2";
1068             else if (enc->sub_id == 1)
1069                 codec_name = "mp1";
1070         }
1071     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
1072         /* fake mpeg2 transport stream codec (currently not
1073            registered) */
1074         codec_name = "mpeg2ts";
1075     } else if (enc->codec_name[0] != '\0') {
1076         codec_name = enc->codec_name;
1077     } else {
1078         /* output avi tags */
1079         if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
1080            && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
1081             snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
1082                      enc->codec_tag & 0xff,
1083                      (enc->codec_tag >> 8) & 0xff,
1084                      (enc->codec_tag >> 16) & 0xff,
1085                      (enc->codec_tag >> 24) & 0xff,
1086                       enc->codec_tag);
1087         } else {
1088             snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
1089         }
1090         codec_name = buf1;
1091     }
1092
1093     switch(enc->codec_type) {
1094     case CODEC_TYPE_VIDEO:
1095         snprintf(buf, buf_size,
1096                  "Video: %s%s",
1097                  codec_name, enc->mb_decision ? " (hq)" : "");
1098         if (enc->pix_fmt != PIX_FMT_NONE) {
1099             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1100                      ", %s",
1101                      avcodec_get_pix_fmt_name(enc->pix_fmt));
1102         }
1103         if (enc->width) {
1104             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1105                      ", %dx%d",
1106                      enc->width, enc->height);
1107             if (enc->sample_aspect_ratio.num) {
1108                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1109                           enc->width*enc->sample_aspect_ratio.num,
1110                           enc->height*enc->sample_aspect_ratio.den,
1111                           1024*1024);
1112                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1113                          " [PAR %d:%d DAR %d:%d]",
1114                          enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1115                          display_aspect_ratio.num, display_aspect_ratio.den);
1116             }
1117             if(av_log_get_level() >= AV_LOG_DEBUG){
1118                 int g= ff_gcd(enc->time_base.num, enc->time_base.den);
1119                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1120                      ", %d/%d",
1121                      enc->time_base.num/g, enc->time_base.den/g);
1122             }
1123         }
1124         if (encode) {
1125             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1126                      ", q=%d-%d", enc->qmin, enc->qmax);
1127         }
1128         bitrate = enc->bit_rate;
1129         break;
1130     case CODEC_TYPE_AUDIO:
1131         snprintf(buf, buf_size,
1132                  "Audio: %s",
1133                  codec_name);
1134         switch (enc->channels) {
1135             case 1:
1136                 strcpy(channels_str, "mono");
1137                 break;
1138             case 2:
1139                 strcpy(channels_str, "stereo");
1140                 break;
1141             case 6:
1142                 strcpy(channels_str, "5:1");
1143                 break;
1144             default:
1145                 snprintf(channels_str, sizeof(channels_str), "%d channels", enc->channels);
1146                 break;
1147         }
1148         if (enc->sample_rate) {
1149             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1150                      ", %d Hz, %s",
1151                      enc->sample_rate,
1152                      channels_str);
1153         }
1154         if (enc->sample_fmt != SAMPLE_FMT_NONE) {
1155             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1156                      ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
1157         }
1158
1159         /* for PCM codecs, compute bitrate directly */
1160         switch(enc->codec_id) {
1161         case CODEC_ID_PCM_F64BE:
1162         case CODEC_ID_PCM_F64LE:
1163             bitrate = enc->sample_rate * enc->channels * 64;
1164             break;
1165         case CODEC_ID_PCM_S32LE:
1166         case CODEC_ID_PCM_S32BE:
1167         case CODEC_ID_PCM_U32LE:
1168         case CODEC_ID_PCM_U32BE:
1169         case CODEC_ID_PCM_F32BE:
1170         case CODEC_ID_PCM_F32LE:
1171             bitrate = enc->sample_rate * enc->channels * 32;
1172             break;
1173         case CODEC_ID_PCM_S24LE:
1174         case CODEC_ID_PCM_S24BE:
1175         case CODEC_ID_PCM_U24LE:
1176         case CODEC_ID_PCM_U24BE:
1177         case CODEC_ID_PCM_S24DAUD:
1178             bitrate = enc->sample_rate * enc->channels * 24;
1179             break;
1180         case CODEC_ID_PCM_S16LE:
1181         case CODEC_ID_PCM_S16BE:
1182         case CODEC_ID_PCM_S16LE_PLANAR:
1183         case CODEC_ID_PCM_U16LE:
1184         case CODEC_ID_PCM_U16BE:
1185             bitrate = enc->sample_rate * enc->channels * 16;
1186             break;
1187         case CODEC_ID_PCM_S8:
1188         case CODEC_ID_PCM_U8:
1189         case CODEC_ID_PCM_ALAW:
1190         case CODEC_ID_PCM_MULAW:
1191         case CODEC_ID_PCM_ZORK:
1192             bitrate = enc->sample_rate * enc->channels * 8;
1193             break;
1194         default:
1195             bitrate = enc->bit_rate;
1196             break;
1197         }
1198         break;
1199     case CODEC_TYPE_DATA:
1200         snprintf(buf, buf_size, "Data: %s", codec_name);
1201         bitrate = enc->bit_rate;
1202         break;
1203     case CODEC_TYPE_SUBTITLE:
1204         snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1205         bitrate = enc->bit_rate;
1206         break;
1207     case CODEC_TYPE_ATTACHMENT:
1208         snprintf(buf, buf_size, "Attachment: %s", codec_name);
1209         bitrate = enc->bit_rate;
1210         break;
1211     default:
1212         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1213         return;
1214     }
1215     if (encode) {
1216         if (enc->flags & CODEC_FLAG_PASS1)
1217             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1218                      ", pass 1");
1219         if (enc->flags & CODEC_FLAG_PASS2)
1220             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1221                      ", pass 2");
1222     }
1223     if (bitrate != 0) {
1224         snprintf(buf + strlen(buf), buf_size - strlen(buf),
1225                  ", %d kb/s", bitrate / 1000);
1226     }
1227 }
1228
1229 unsigned avcodec_version( void )
1230 {
1231   return LIBAVCODEC_VERSION_INT;
1232 }
1233
1234 void avcodec_init(void)
1235 {
1236     static int initialized = 0;
1237
1238     if (initialized != 0)
1239         return;
1240     initialized = 1;
1241
1242     dsputil_static_init();
1243 }
1244
1245 void avcodec_flush_buffers(AVCodecContext *avctx)
1246 {
1247     if(avctx->codec->flush)
1248         avctx->codec->flush(avctx);
1249 }
1250
1251 void avcodec_default_free_buffers(AVCodecContext *s){
1252     int i, j;
1253
1254     if(s->internal_buffer==NULL) return;
1255
1256     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
1257         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
1258         for(j=0; j<4; j++){
1259             av_freep(&buf->base[j]);
1260             buf->data[j]= NULL;
1261         }
1262     }
1263     av_freep(&s->internal_buffer);
1264
1265     s->internal_buffer_count=0;
1266 }
1267
1268 char av_get_pict_type_char(int pict_type){
1269     switch(pict_type){
1270     case FF_I_TYPE: return 'I';
1271     case FF_P_TYPE: return 'P';
1272     case FF_B_TYPE: return 'B';
1273     case FF_S_TYPE: return 'S';
1274     case FF_SI_TYPE:return 'i';
1275     case FF_SP_TYPE:return 'p';
1276     case FF_BI_TYPE:return 'b';
1277     default:        return '?';
1278     }
1279 }
1280
1281 int av_get_bits_per_sample(enum CodecID codec_id){
1282     switch(codec_id){
1283     case CODEC_ID_ADPCM_SBPRO_2:
1284         return 2;
1285     case CODEC_ID_ADPCM_SBPRO_3:
1286         return 3;
1287     case CODEC_ID_ADPCM_SBPRO_4:
1288     case CODEC_ID_ADPCM_CT:
1289         return 4;
1290     case CODEC_ID_PCM_ALAW:
1291     case CODEC_ID_PCM_MULAW:
1292     case CODEC_ID_PCM_S8:
1293     case CODEC_ID_PCM_U8:
1294     case CODEC_ID_PCM_ZORK:
1295         return 8;
1296     case CODEC_ID_PCM_S16BE:
1297     case CODEC_ID_PCM_S16LE:
1298     case CODEC_ID_PCM_S16LE_PLANAR:
1299     case CODEC_ID_PCM_U16BE:
1300     case CODEC_ID_PCM_U16LE:
1301         return 16;
1302     case CODEC_ID_PCM_S24DAUD:
1303     case CODEC_ID_PCM_S24BE:
1304     case CODEC_ID_PCM_S24LE:
1305     case CODEC_ID_PCM_U24BE:
1306     case CODEC_ID_PCM_U24LE:
1307         return 24;
1308     case CODEC_ID_PCM_S32BE:
1309     case CODEC_ID_PCM_S32LE:
1310     case CODEC_ID_PCM_U32BE:
1311     case CODEC_ID_PCM_U32LE:
1312     case CODEC_ID_PCM_F32BE:
1313     case CODEC_ID_PCM_F32LE:
1314         return 32;
1315     case CODEC_ID_PCM_F64BE:
1316     case CODEC_ID_PCM_F64LE:
1317         return 64;
1318     default:
1319         return 0;
1320     }
1321 }
1322
1323 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
1324     switch (sample_fmt) {
1325     case SAMPLE_FMT_U8:
1326         return 8;
1327     case SAMPLE_FMT_S16:
1328         return 16;
1329     case SAMPLE_FMT_S32:
1330     case SAMPLE_FMT_FLT:
1331         return 32;
1332     case SAMPLE_FMT_DBL:
1333         return 64;
1334     default:
1335         return 0;
1336     }
1337 }
1338
1339 #if !defined(HAVE_THREADS)
1340 int avcodec_thread_init(AVCodecContext *s, int thread_count){
1341     return -1;
1342 }
1343 #endif
1344
1345 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1346 {
1347     unsigned int n = 0;
1348
1349     while(v >= 0xff) {
1350         *s++ = 0xff;
1351         v -= 0xff;
1352         n++;
1353     }
1354     *s = v;
1355     n++;
1356     return n;
1357 }
1358
1359 /* Wrapper to work around the lack of mkstemp() on mingw/cygin.
1360  * Also, tries to create file in /tmp first, if possible.
1361  * *prefix can be a character constant; *filename will be allocated internally.
1362  * Returns file descriptor of opened file (or -1 on error)
1363  * and opened file name in **filename. */
1364 int av_tempfile(char *prefix, char **filename) {
1365     int fd=-1;
1366 #if !defined(HAVE_MKSTEMP)
1367     *filename = tempnam(".", prefix);
1368 #else
1369     size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
1370     *filename = av_malloc(len);
1371 #endif
1372     /* -----common section-----*/
1373     if (*filename == NULL) {
1374         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
1375         return -1;
1376     }
1377 #if !defined(HAVE_MKSTEMP)
1378     fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
1379 #else
1380     snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
1381     fd = mkstemp(*filename);
1382     if (fd < 0) {
1383         snprintf(*filename, len, "./%sXXXXXX", prefix);
1384         fd = mkstemp(*filename);
1385     }
1386 #endif
1387     /* -----common section-----*/
1388     if (fd < 0) {
1389         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
1390         return -1;
1391     }
1392     return fd; /* success */
1393 }
1394
1395 typedef struct {
1396     const char *abbr;
1397     int width, height;
1398 } VideoFrameSizeAbbr;
1399
1400 typedef struct {
1401     const char *abbr;
1402     int rate_num, rate_den;
1403 } VideoFrameRateAbbr;
1404
1405 static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
1406     { "ntsc",      720, 480 },
1407     { "pal",       720, 576 },
1408     { "qntsc",     352, 240 }, /* VCD compliant NTSC */
1409     { "qpal",      352, 288 }, /* VCD compliant PAL */
1410     { "sntsc",     640, 480 }, /* square pixel NTSC */
1411     { "spal",      768, 576 }, /* square pixel PAL */
1412     { "film",      352, 240 },
1413     { "ntsc-film", 352, 240 },
1414     { "sqcif",     128,  96 },
1415     { "qcif",      176, 144 },
1416     { "cif",       352, 288 },
1417     { "4cif",      704, 576 },
1418     { "qqvga",     160, 120 },
1419     { "qvga",      320, 240 },
1420     { "vga",       640, 480 },
1421     { "svga",      800, 600 },
1422     { "xga",      1024, 768 },
1423     { "uxga",     1600,1200 },
1424     { "qxga",     2048,1536 },
1425     { "sxga",     1280,1024 },
1426     { "qsxga",    2560,2048 },
1427     { "hsxga",    5120,4096 },
1428     { "wvga",      852, 480 },
1429     { "wxga",     1366, 768 },
1430     { "wsxga",    1600,1024 },
1431     { "wuxga",    1920,1200 },
1432     { "woxga",    2560,1600 },
1433     { "wqsxga",   3200,2048 },
1434     { "wquxga",   3840,2400 },
1435     { "whsxga",   6400,4096 },
1436     { "whuxga",   7680,4800 },
1437     { "cga",       320, 200 },
1438     { "ega",       640, 350 },
1439     { "hd480",     852, 480 },
1440     { "hd720",    1280, 720 },
1441     { "hd1080",   1920,1080 },
1442 };
1443
1444 static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1445     { "ntsc",      30000, 1001 },
1446     { "pal",          25,    1 },
1447     { "qntsc",     30000, 1001 }, /* VCD compliant NTSC */
1448     { "qpal",         25,    1 }, /* VCD compliant PAL */
1449     { "sntsc",     30000, 1001 }, /* square pixel NTSC */
1450     { "spal",         25,    1 }, /* square pixel PAL */
1451     { "film",         24,    1 },
1452     { "ntsc-film", 24000, 1001 },
1453 };
1454
1455 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1456 {
1457     int i;
1458     int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1459     const char *p;
1460     int frame_width = 0, frame_height = 0;
1461
1462     for(i=0;i<n;i++) {
1463         if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1464             frame_width = video_frame_size_abbrs[i].width;
1465             frame_height = video_frame_size_abbrs[i].height;
1466             break;
1467         }
1468     }
1469     if (i == n) {
1470         p = str;
1471         frame_width = strtol(p, (char **)&p, 10);
1472         if (*p)
1473             p++;
1474         frame_height = strtol(p, (char **)&p, 10);
1475     }
1476     if (frame_width <= 0 || frame_height <= 0)
1477         return -1;
1478     *width_ptr = frame_width;
1479     *height_ptr = frame_height;
1480     return 0;
1481 }
1482
1483 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1484 {
1485     int i;
1486     int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1487     char* cp;
1488
1489     /* First, we check our abbreviation table */
1490     for (i = 0; i < n; ++i)
1491          if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1492              frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1493              frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1494              return 0;
1495          }
1496
1497     /* Then, we try to parse it as fraction */
1498     cp = strchr(arg, '/');
1499     if (!cp)
1500         cp = strchr(arg, ':');
1501     if (cp) {
1502         char* cpp;
1503         frame_rate->num = strtol(arg, &cpp, 10);
1504         if (cpp != arg || cpp == cp)
1505             frame_rate->den = strtol(cp+1, &cpp, 10);
1506         else
1507            frame_rate->num = 0;
1508     }
1509     else {
1510         /* Finally we give up and parse it as double */
1511         AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1512         frame_rate->den = time_base.den;
1513         frame_rate->num = time_base.num;
1514     }
1515     if (!frame_rate->num || !frame_rate->den)
1516         return -1;
1517     else
1518         return 0;
1519 }
1520
1521 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1522 {
1523     av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1524             "version to the newest one from SVN. If the problem still "
1525             "occurs, it means that your file has a feature which has not "
1526             "been implemented.", feature);
1527     if(want_sample)
1528         av_log(avc, AV_LOG_WARNING, " If you want to help, upload a sample "
1529                 "of this file to ftp://upload.mplayerhq.hu/MPlayer/incoming/ "
1530                 "and contact the FFmpeg-devel mailing list.");
1531     av_log(avc, AV_LOG_WARNING, "\n");
1532 }