falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
8579 Commits
32 Branches
283MB
Tree: 024c7378c3
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '024c7378c3'
${ noResults }
FFmpeg/libavcodec/utils.c

1320 lines
62KB
Raw Blame History 

  1. /*

  2.  * utils for libavcodec

  3.  * Copyright (c) 2001 Fabrice Bellard.

  4.  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

  8.  * FFmpeg is free software; you can redistribute it and/or

  9.  * modify it under the terms of the GNU Lesser General Public

  10.  * License as published by the Free Software Foundation; either

  11.  * version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * FFmpeg is distributed in the hope that it will be useful,

  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  16.  * Lesser General Public License for more details.

  17.  *

  18.  * You should have received a copy of the GNU Lesser General Public

  19.  * License along with FFmpeg; if not, write to the Free Software

  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  21.  */

  22. 

  23. /**

  24.  * @file utils.c

  25.  * utils.

  26.  */

  27. 

  28. #include "avcodec.h"

  29. #include "dsputil.h"

  30. #include "mpegvideo.h"

  31. #include "integer.h"

  32. #include "opt.h"

  33. #include "crc.h"

  34. #include <stdarg.h>

  35. #include <limits.h>

  36. #include <float.h>

  37. #ifdef __MINGW32__

  38. #include <fcntl.h>

  39. #endif

  40. 

  41. const uint8_t ff_reverse[256]={

  42. 0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,

  43. 0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,

  44. 0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,

  45. 0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,

  46. 0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,

  47. 0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,

  48. 0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,

  49. 0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,

  50. 0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,

  51. 0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,

  52. 0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,

  53. 0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,

  54. 0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,

  55. 0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,

  56. 0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,

  57. 0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,

  58. };

  59. 

  60. static int volatile entangled_thread_counter=0;

  61. 

  62. 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.     return av_realloc(ptr, *size);

  70. }

  71. 

  72. static unsigned int last_static = 0;

  73. static unsigned int allocated_static = 0;

  74. static void** array_static = NULL;

  75. 

  76. void *av_mallocz_static(unsigned int size)

  77. {

  78.     void *ptr = av_mallocz(size);

  79. 

  80.     if(ptr){

  81.         array_static =av_fast_realloc(array_static, &allocated_static, sizeof(void*)*(last_static+1));

  82.         if(!array_static)

  83.             return NULL;

  84.         array_static[last_static++] = ptr;

  85.     }

  86. 

  87.     return ptr;

  88. }

  89. 

  90. void *ff_realloc_static(void *ptr, unsigned int size)

  91. {

  92.     int i;

  93.     if(!ptr)

  94.       return av_mallocz_static(size);

  95.     /* Look for the old ptr */

  96.     for(i = 0; i < last_static; i++) {

  97.         if(array_static[i] == ptr) {

  98.             array_static[i] = av_realloc(array_static[i], size);

  99.             return array_static[i];

  100.         }

  101.     }

  102.     return NULL;

  103. 

  104. }

  105. 

  106. void av_free_static(void)

  107. {

  108.     while(last_static){

  109.         av_freep(&array_static[--last_static]);

  110.     }

  111.     av_freep(&array_static);

  112. }

  113. 

  114. /**

  115.  * Call av_free_static automatically before it's too late

  116.  */

  117. 

  118. static void do_free(void) __attribute__ ((destructor));

  119. 

  120. static void do_free(void)

  121. {

  122.     av_free_static();

  123. }

  124. 

  125. 

  126. /* encoder management */

  127. AVCodec *first_avcodec = NULL;

  128. 

  129. void register_avcodec(AVCodec *format)

  130. {

  131.     AVCodec **p;

  132.     p = &first_avcodec;

  133.     while (*p != NULL) p = &(*p)->next;

  134.     *p = format;

  135.     format->next = NULL;

  136. }

  137. 

  138. void avcodec_set_dimensions(AVCodecContext *s, int width, int height){

  139.     s->coded_width = width;

  140.     s->coded_height= height;

  141.     s->width = -((-width )>>s->lowres);

  142.     s->height= -((-height)>>s->lowres);

  143. }

  144. 

  145. typedef struct InternalBuffer{

  146.     int last_pic_num;

  147.     uint8_t *base[4];

  148.     uint8_t *data[4];

  149.     int linesize[4];

  150. }InternalBuffer;

  151. 

  152. #define INTERNAL_BUFFER_SIZE 32

  153. 

  154. #define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))

  155. 

  156. void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){

  157.     int w_align= 1;

  158.     int h_align= 1;

  159. 

  160.     switch(s->pix_fmt){

  161.     case PIX_FMT_YUV420P:

  162.     case PIX_FMT_YUYV422:

  163.     case PIX_FMT_UYVY422:

  164.     case PIX_FMT_YUV422P:

  165.     case PIX_FMT_YUV444P:

  166.     case PIX_FMT_GRAY8:

  167.     case PIX_FMT_GRAY16BE:

  168.     case PIX_FMT_GRAY16LE:

  169.     case PIX_FMT_YUVJ420P:

  170.     case PIX_FMT_YUVJ422P:

  171.     case PIX_FMT_YUVJ444P:

  172.         w_align= 16; //FIXME check for non mpeg style codecs and use less alignment

  173.         h_align= 16;

  174.         break;

  175.     case PIX_FMT_YUV411P:

  176.     case PIX_FMT_UYYVYY411:

  177.         w_align=32;

  178.         h_align=8;

  179.         break;

  180.     case PIX_FMT_YUV410P:

  181.         if(s->codec_id == CODEC_ID_SVQ1){

  182.             w_align=64;

  183.             h_align=64;

  184.         }

  185.     case PIX_FMT_RGB555:

  186.         if(s->codec_id == CODEC_ID_RPZA){

  187.             w_align=4;

  188.             h_align=4;

  189.         }

  190.     case PIX_FMT_PAL8:

  191.         if(s->codec_id == CODEC_ID_SMC){

  192.             w_align=4;

  193.             h_align=4;

  194.         }

  195.         break;

  196.     case PIX_FMT_BGR24:

  197.         if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){

  198.             w_align=4;

  199.             h_align=4;

  200.         }

  201.         break;

  202.     default:

  203.         w_align= 1;

  204.         h_align= 1;

  205.         break;

  206.     }

  207. 

  208.     *width = ALIGN(*width , w_align);

  209.     *height= ALIGN(*height, h_align);

  210. }

  211. 

  212. int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){

  213.     if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/4)

  214.         return 0;

  215. 

  216.     av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);

  217.     return -1;

  218. }

  219. 

  220. int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){

  221.     int i;

  222.     int w= s->width;

  223.     int h= s->height;

  224.     InternalBuffer *buf;

  225.     int *picture_number;

  226. 

  227.     if(pic->data[0]!=NULL) {

  228.         av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");

  229.         return -1;

  230.     }

  231.     if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {

  232.         av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");

  233.         return -1;

  234.     }

  235. 

  236.     if(avcodec_check_dimensions(s,w,h))

  237.         return -1;

  238. 

  239.     if(s->internal_buffer==NULL){

  240.         s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));

  241.     }

  242. #if 0

  243.     s->internal_buffer= av_fast_realloc(

  244.         s->internal_buffer,

  245.         &s->internal_buffer_size,

  246.         sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/

  247.         );

  248. #endif

  249. 

  250.     buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];

  251.     picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack

  252.     (*picture_number)++;

  253. 

  254.     if(buf->base[0]){

  255.         pic->age= *picture_number - buf->last_pic_num;

  256.         buf->last_pic_num= *picture_number;

  257.     }else{

  258.         int h_chroma_shift, v_chroma_shift;

  259.         int pixel_size, size[3];

  260.         AVPicture picture;

  261. 

  262.         avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);

  263. 

  264.         avcodec_align_dimensions(s, &w, &h);

  265. 

  266.         if(!(s->flags&CODEC_FLAG_EMU_EDGE)){

  267.             w+= EDGE_WIDTH*2;

  268.             h+= EDGE_WIDTH*2;

  269.         }

  270.         avpicture_fill(&picture, NULL, s->pix_fmt, w, h);

  271.         pixel_size= picture.linesize[0]*8 / w;

  272. //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d\n", (int)picture.data[1], w, h, s->pix_fmt);

  273.         assert(pixel_size>=1);

  274.             //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it

  275.         if(pixel_size == 3*8)

  276.             w= ALIGN(w, STRIDE_ALIGN<<h_chroma_shift);

  277.         else

  278.             w= ALIGN(pixel_size*w, STRIDE_ALIGN<<(h_chroma_shift+3)) / pixel_size;

  279.         size[1] = avpicture_fill(&picture, NULL, s->pix_fmt, w, h);

  280.         size[0] = picture.linesize[0] * h;

  281.         size[1] -= size[0];

  282.         if(picture.data[2])

  283.             size[1]= size[2]= size[1]/2;

  284.         else

  285.             size[2]= 0;

  286. 

  287.         buf->last_pic_num= -256*256*256*64;

  288.         memset(buf->base, 0, sizeof(buf->base));

  289.         memset(buf->data, 0, sizeof(buf->data));

  290. 

  291.         for(i=0; i<3 && size[i]; i++){

  292.             const int h_shift= i==0 ? 0 : h_chroma_shift;

  293.             const int v_shift= i==0 ? 0 : v_chroma_shift;

  294. 

  295.             buf->linesize[i]= picture.linesize[i];

  296. 

  297.             buf->base[i]= av_malloc(size[i]+16); //FIXME 16

  298.             if(buf->base[i]==NULL) return -1;

  299.             memset(buf->base[i], 128, size[i]);

  300. 

  301.             // no edge if EDEG EMU or not planar YUV, we check for PAL8 redundantly to protect against a exploitable bug regression ...

  302.             if((s->flags&CODEC_FLAG_EMU_EDGE) || (s->pix_fmt == PIX_FMT_PAL8) || !size[2])

  303.                 buf->data[i] = buf->base[i];

  304.             else

  305.                 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), STRIDE_ALIGN);

  306.         }

  307.         pic->age= 256*256*256*64;

  308.     }

  309.     pic->type= FF_BUFFER_TYPE_INTERNAL;

  310. 

  311.     for(i=0; i<4; i++){

  312.         pic->base[i]= buf->base[i];

  313.         pic->data[i]= buf->data[i];

  314.         pic->linesize[i]= buf->linesize[i];

  315.     }

  316.     s->internal_buffer_count++;

  317. 

  318.     return 0;

  319. }

  320. 

  321. void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){

  322.     int i;

  323.     InternalBuffer *buf, *last;

  324. 

  325.     assert(pic->type==FF_BUFFER_TYPE_INTERNAL);

  326.     assert(s->internal_buffer_count);

  327. 

  328.     buf = NULL; /* avoids warning */

  329.     for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize

  330.         buf= &((InternalBuffer*)s->internal_buffer)[i];

  331.         if(buf->data[0] == pic->data[0])

  332.             break;

  333.     }

  334.     assert(i < s->internal_buffer_count);

  335.     s->internal_buffer_count--;

  336.     last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];

  337. 

  338.     FFSWAP(InternalBuffer, *buf, *last);

  339. 

  340.     for(i=0; i<3; i++){

  341.         pic->data[i]=NULL;

  342. //        pic->base[i]=NULL;

  343.     }

  344. //printf("R%X\n", pic->opaque);

  345. }

  346. 

  347. int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){

  348.     AVFrame temp_pic;

  349.     int i;

  350. 

  351.     /* If no picture return a new buffer */

  352.     if(pic->data[0] == NULL) {

  353.         /* We will copy from buffer, so must be readable */

  354.         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;

  355.         return s->get_buffer(s, pic);

  356.     }

  357. 

  358.     /* If internal buffer type return the same buffer */

  359.     if(pic->type == FF_BUFFER_TYPE_INTERNAL)

  360.         return 0;

  361. 

  362.     /*

  363.      * Not internal type and reget_buffer not overridden, emulate cr buffer

  364.      */

  365.     temp_pic = *pic;

  366.     for(i = 0; i < 4; i++)

  367.         pic->data[i] = pic->base[i] = NULL;

  368.     pic->opaque = NULL;

  369.     /* Allocate new frame */

  370.     if (s->get_buffer(s, pic))

  371.         return -1;

  372.     /* Copy image data from old buffer to new buffer */

  373.     img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,

  374.              s->height);

  375.     s->release_buffer(s, &temp_pic); // Release old frame

  376.     return 0;

  377. }

  378. 

  379. int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){

  380.     int i;

  381. 

  382.     for(i=0; i<count; i++){

  383.         int r= func(c, arg[i]);

  384.         if(ret) ret[i]= r;

  385.     }

  386.     return 0;

  387. }

  388. 

  389. enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){

  390.     return fmt[0];

  391. }

  392. 

  393. static const char* context_to_name(void* ptr) {

  394.     AVCodecContext *avc= ptr;

  395. 

  396.     if(avc && avc->codec && avc->codec->name)

  397.         return avc->codec->name;

  398.     else

  399.         return "NULL";

  400. }

  401. 

  402. #define OFFSET(x) offsetof(AVCodecContext,x)

  403. #define DEFAULT 0 //should be NAN but it doesnt work as its not a constant in glibc as required by ANSI/ISO C

  404. //these names are too long to be readable

  405. #define V AV_OPT_FLAG_VIDEO_PARAM

  406. #define A AV_OPT_FLAG_AUDIO_PARAM

  407. #define S AV_OPT_FLAG_SUBTITLE_PARAM

  408. #define E AV_OPT_FLAG_ENCODING_PARAM

  409. #define D AV_OPT_FLAG_DECODING_PARAM

  410. 

  411. #define AV_CODEC_DEFAULT_BITRATE 200*1000

  412. 

  413. static const AVOption options[]={

  414. {"b", "set video bitrate (in bits/s)", OFFSET(bit_rate), FF_OPT_TYPE_INT, AV_CODEC_DEFAULT_BITRATE, INT_MIN, INT_MAX, V|A|E},

  415. {"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},

  416. {"flags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, V|A|E|D, "flags"},

  417. {"mv4", "use four motion vector by macroblock (mpeg4)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_4MV, INT_MIN, INT_MAX, V|E, "flags"},

  418. {"obmc", "use overlapped block motion compensation (h263+)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_OBMC, INT_MIN, INT_MAX, V|E, "flags"},

  419. {"qpel", "use 1/4 pel motion compensation", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QPEL, INT_MIN, INT_MAX, V|E, "flags"},

  420. {"loop", "use loop filter", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_LOOP_FILTER, INT_MIN, INT_MAX, V|E, "flags"},

  421. {"qscale", "use fixed qscale", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QSCALE, INT_MIN, INT_MAX, 0, "flags"},

  422. {"gmc", "use gmc", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GMC, INT_MIN, INT_MAX, V|E, "flags"},

  423. {"mv0", "always try a mb with mv=<0,0>", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_MV0, INT_MIN, INT_MAX, V|E, "flags"},

  424. {"part", "use data partitioning", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PART, INT_MIN, INT_MAX, V|E, "flags"},

  425. {"input_preserved", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INPUT_PRESERVED, INT_MIN, INT_MAX, 0, "flags"},

  426. {"pass1", "use internal 2pass ratecontrol in first  pass mode", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PASS1, INT_MIN, INT_MAX, 0, "flags"},

  427. {"pass2", "use internal 2pass ratecontrol in second pass mode", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PASS2, INT_MIN, INT_MAX, 0, "flags"},

  428. {"extern_huff", "use external huffman table (for mjpeg)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_EXTERN_HUFF, INT_MIN, INT_MAX, 0, "flags"},

  429. {"gray", "only decode/encode grayscale", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GRAY, INT_MIN, INT_MAX, V|E|D, "flags"},

  430. {"emu_edge", "don't draw edges", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_EMU_EDGE, INT_MIN, INT_MAX, 0, "flags"},

  431. {"psnr", "error[?] variables will be set during encoding", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PSNR, INT_MIN, INT_MAX, V|E, "flags"},

  432. {"truncated", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_TRUNCATED, INT_MIN, INT_MAX, 0, "flags"},

  433. {"naq", "normalize adaptive quantization", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_NORMALIZE_AQP, INT_MIN, INT_MAX, V|E, "flags"},

  434. {"ildct", "use interlaced dct", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INTERLACED_DCT, INT_MIN, INT_MAX, V|E, "flags"},

  435. {"low_delay", "force low delay", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_LOW_DELAY, INT_MIN, INT_MAX, V|D|E, "flags"},

  436. {"alt", "enable alternate scantable (mpeg2/mpeg4)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_ALT_SCAN, INT_MIN, INT_MAX, V|E, "flags"},

  437. {"trell", "use trellis quantization", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_TRELLIS_QUANT, INT_MIN, INT_MAX, V|E, "flags"},

  438. {"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"},

  439. {"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"},

  440. {"aic", "h263 advanced intra coding / mpeg4 ac prediction", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_AC_PRED, INT_MIN, INT_MAX, V|E, "flags"},

  441. {"umv", "use unlimited motion vectors", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_UMV, INT_MIN, INT_MAX, V|E, "flags"},

  442. {"cbp", "use rate distortion optimization for cbp", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_CBP_RD, INT_MIN, INT_MAX, V|E, "flags"},

  443. {"qprd", "use rate distortion optimization for qp selection", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QP_RD, INT_MIN, INT_MAX, V|E, "flags"},

  444. {"aiv", "h263 alternative inter vlc", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_AIV, INT_MIN, INT_MAX, V|E, "flags"},

  445. {"slice", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_SLICE_STRUCT, INT_MIN, INT_MAX, V|E, "flags"},

  446. {"ilme", "interlaced motion estimation", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INTERLACED_ME, INT_MIN, INT_MAX, V|E, "flags"},

  447. {"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"},

  448. {"cgop", "closed gop", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_CLOSED_GOP, INT_MIN, INT_MAX, V|E, "flags"},

  449. {"fast", "allow non spec compliant speedup tricks", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_FAST, INT_MIN, INT_MAX, V|E, "flags2"},

  450. {"sgop", "strictly enforce gop size", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_STRICT_GOP, INT_MIN, INT_MAX, V|E, "flags2"},

  451. {"noout", "skip bitstream encoding", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_NO_OUTPUT, INT_MIN, INT_MAX, V|E, "flags2"},

  452. {"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"},

  453. {"sub_id", NULL, OFFSET(sub_id), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  454. {"me_method", "set motion estimation method", OFFSET(me_method), FF_OPT_TYPE_INT, ME_EPZS, INT_MIN, INT_MAX, V|E, "me_method"},

  455. {"extradata_size", NULL, OFFSET(extradata_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  456. {"time_base", NULL, OFFSET(time_base), FF_OPT_TYPE_RATIONAL, DEFAULT, INT_MIN, INT_MAX},

  457. {"g", "set the group of picture size", OFFSET(gop_size), FF_OPT_TYPE_INT, 12, INT_MIN, INT_MAX, V|E},

  458. {"rate_emu", "frame rate emulation", OFFSET(rate_emu), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  459. {"ar", "set audio sampling rate (in Hz)", OFFSET(sample_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  460. {"ac", "set number of audio channels", OFFSET(channels), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  461. {"cutoff", "set cutoff bandwidth", OFFSET(cutoff), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|E},

  462. {"frame_size", NULL, OFFSET(frame_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|E},

  463. {"frame_number", NULL, OFFSET(frame_number), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  464. {"real_pict_num", NULL, OFFSET(real_pict_num), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  465. {"delay", NULL, OFFSET(delay), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  466. {"qcomp", "video quantizer scale compression (VBR)", OFFSET(qcompress), FF_OPT_TYPE_FLOAT, 0.5, FLT_MIN, FLT_MAX, V|E},

  467. {"qblur", "video quantizer scale blur (VBR)", OFFSET(qblur), FF_OPT_TYPE_FLOAT, 0.5, FLT_MIN, FLT_MAX, V|E},

  468. {"qmin", "min video quantizer scale (VBR)", OFFSET(qmin), FF_OPT_TYPE_INT, 2, 1, 51, V|E},

  469. {"qmax", "max video quantizer scale (VBR)", OFFSET(qmax), FF_OPT_TYPE_INT, 31, 1, 51, V|E},

  470. {"qdiff", "max difference between the quantizer scale (VBR)", OFFSET(max_qdiff), FF_OPT_TYPE_INT, 3, INT_MIN, INT_MAX, V|E},

  471. {"bf", "use 'frames' B frames", OFFSET(max_b_frames), FF_OPT_TYPE_INT, DEFAULT, 0, FF_MAX_B_FRAMES, V|E},

  472. {"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},

  473. {"rc_strategy", "ratecontrol method", OFFSET(rc_strategy), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  474. {"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},

  475. {"hurry_up", NULL, OFFSET(hurry_up), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D},

  476. #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)

  477. {"rtp_mode", NULL, OFFSET(rtp_mode), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  478. #endif

  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, "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|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|E, "strict"},

  511. {"normal", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_NORMAL, INT_MIN, INT_MAX, V|E, "strict"},

  512. {"inofficial", "allow inofficial extensions", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_INOFFICIAL, INT_MIN, INT_MAX, V|E, "strict"},

  513. {"experimental", "allow non standarized experimental things", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_EXPERIMENTAL, INT_MIN, INT_MAX, V|E, "strict"},

  514. {"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},

  515. {"er", "set error resilience strategy", OFFSET(error_resilience), 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, V|E},

  534. {"rc_buf_aggressivity", "currently useless", OFFSET(rc_buffer_aggressivity), FF_OPT_TYPE_FLOAT, 1.0, FLT_MIN, 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. {"unused", NULL, OFFSET(unused), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  552. {"idct", "select IDCT implementation", OFFSET(idct_algo), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|E|D, "idct"},

  553. {"auto", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_AUTO, INT_MIN, INT_MAX, V|E|D, "idct"},

  554. {"int", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_INT, INT_MIN, INT_MAX, V|E|D, "idct"},

  555. {"simple", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLE, INT_MIN, INT_MAX, V|E|D, "idct"},

  556. {"simplemmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEMMX, INT_MIN, INT_MAX, V|E|D, "idct"},

  557. {"libmpeg2mmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_LIBMPEG2MMX, INT_MIN, INT_MAX, V|E|D, "idct"},

  558. {"ps2", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_PS2, INT_MIN, INT_MAX, V|E|D, "idct"},

  559. {"mlib", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_MLIB, INT_MIN, INT_MAX, V|E|D, "idct"},

  560. {"arm", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_ARM, INT_MIN, INT_MAX, V|E|D, "idct"},

  561. {"altivec", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_ALTIVEC, INT_MIN, INT_MAX, V|E|D, "idct"},

  562. {"sh4", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SH4, INT_MIN, INT_MAX, V|E|D, "idct"},

  563. {"simplearm", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEARM, INT_MIN, INT_MAX, V|E|D, "idct"},

  564. {"simplearmv5te", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEARMV5TE, 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. {"slice_count", NULL, OFFSET(slice_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  570. {"ec", "set error concealment strategy", OFFSET(error_concealment), FF_OPT_TYPE_FLAGS, 3, INT_MIN, INT_MAX, V|D, "ec"},

  571. {"guess_mvs", "iterative motion vector (MV) search (slow)", 0, FF_OPT_TYPE_CONST, FF_EC_GUESS_MVS, INT_MIN, INT_MAX, V|D, "ec"},

  572. {"deblock", "use strong deblock filter for damaged MBs", 0, FF_OPT_TYPE_CONST, FF_EC_DEBLOCK, INT_MIN, INT_MAX, V|D, "ec"},

  573. {"bits_per_sample", NULL, OFFSET(bits_per_sample), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  574. {"pred", "prediction method", OFFSET(prediction_method), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "pred"},

  575. {"left", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_LEFT, INT_MIN, INT_MAX, V|E, "pred"},

  576. {"plane", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_PLANE, INT_MIN, INT_MAX, V|E, "pred"},

  577. {"median", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_MEDIAN, INT_MIN, INT_MAX, V|E, "pred"},

  578. {"aspect", "sample aspect ratio", OFFSET(sample_aspect_ratio), FF_OPT_TYPE_RATIONAL, DEFAULT, 0, 10, V|E},

  579. {"debug", "print specific debug info", OFFSET(debug), FF_OPT_TYPE_FLAGS, DEFAULT, 0, INT_MAX, V|A|S|E|D, "debug"},

  580. {"pict", "picture info", 0, FF_OPT_TYPE_CONST, FF_DEBUG_PICT_INFO, INT_MIN, INT_MAX, V|D, "debug"},

  581. {"rc", "rate control", 0, FF_OPT_TYPE_CONST, FF_DEBUG_RC, INT_MIN, INT_MAX, V|E, "debug"},

  582. {"bitstream", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_BITSTREAM, INT_MIN, INT_MAX, V|D, "debug"},

  583. {"mb_type", "macroblock (MB) type", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},

  584. {"qp", "per-block quantization parameter (QP)", 0, FF_OPT_TYPE_CONST, FF_DEBUG_QP, INT_MIN, INT_MAX, V|D, "debug"},

  585. {"mv", "motion vector", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MV, INT_MIN, INT_MAX, V|D, "debug"},

  586. {"dct_coeff", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_DCT_COEFF, INT_MIN, INT_MAX, V|D, "debug"},

  587. {"skip", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_SKIP, INT_MIN, INT_MAX, V|D, "debug"},

  588. {"startcode", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_STARTCODE, INT_MIN, INT_MAX, V|D, "debug"},

  589. {"pts", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_PTS, INT_MIN, INT_MAX, V|D, "debug"},

  590. {"er", "error resilience", 0, FF_OPT_TYPE_CONST, FF_DEBUG_ER, INT_MIN, INT_MAX, V|D, "debug"},

  591. {"mmco", "memory management control operations (H.264)", 0, FF_OPT_TYPE_CONST, FF_DEBUG_MMCO, INT_MIN, INT_MAX, V|D, "debug"},

  592. {"bugs", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_BUGS, INT_MIN, INT_MAX, V|D, "debug"},

  593. {"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"},

  594. {"vis_mb_type", "visualize block types", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},

  595. {"vismv", "visualize motion vectors (MVs)", OFFSET(debug_mv), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|D, "debug_mv"},

  596. {"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"},

  597. {"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"},

  598. {"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"},

  599. {"mb_qmin", "obsolete, use qmin", OFFSET(mb_qmin), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  600. {"mb_qmax", "obsolete, use qmax", OFFSET(mb_qmax), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  601. {"cmp", "full pel me compare function", OFFSET(me_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},

  602. {"subcmp", "sub pel me compare function", OFFSET(me_sub_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},

  603. {"mbcmp", "macroblock compare function", OFFSET(mb_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},

  604. {"ildctcmp", "interlaced dct compare function", OFFSET(ildct_cmp), FF_OPT_TYPE_INT, FF_CMP_VSAD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  605. {"dia_size", "diamond type & size for motion estimation", OFFSET(dia_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  606. {"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},

  607. {"preme", "pre motion estimation", OFFSET(pre_me), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  608. {"precmp", "pre motion estimation compare function", OFFSET(me_pre_cmp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "cmp_func"},

  609. {"sad", "sum of absolute differences, fast (default)", 0, FF_OPT_TYPE_CONST, FF_CMP_SAD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  610. {"sse", "sum of squared errors", 0, FF_OPT_TYPE_CONST, FF_CMP_SSE, INT_MIN, INT_MAX, V|E, "cmp_func"},

  611. {"satd", "sum of absolute Hadamard transformed differences", 0, FF_OPT_TYPE_CONST, FF_CMP_SATD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  612. {"dct", "sum of absolute DCT transformed differences", 0, FF_OPT_TYPE_CONST, FF_CMP_DCT, INT_MIN, INT_MAX, V|E, "cmp_func"},

  613. {"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"},

  614. {"bit", "number of bits needed for the block", 0, FF_OPT_TYPE_CONST, FF_CMP_BIT, INT_MIN, INT_MAX, V|E, "cmp_func"},

  615. {"rd", "rate distortion optimal, slow", 0, FF_OPT_TYPE_CONST, FF_CMP_RD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  616. {"zero", "0", 0, FF_OPT_TYPE_CONST, FF_CMP_ZERO, INT_MIN, INT_MAX, V|E, "cmp_func"},

  617. {"vsad", "sum of absolute vertical differences", 0, FF_OPT_TYPE_CONST, FF_CMP_VSAD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  618. {"vsse","sum of squared vertical differences", 0, FF_OPT_TYPE_CONST, FF_CMP_VSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},

  619. {"nsse", "noise preserving sum of squared differences", 0, FF_OPT_TYPE_CONST, FF_CMP_NSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},

  620. #ifdef CONFIG_SNOW_ENCODER

  621. {"w53", "5/3 wavelet, only used in snow", 0, FF_OPT_TYPE_CONST, FF_CMP_W53, INT_MIN, INT_MAX, V|E, "cmp_func"},

  622. {"w97", "9/7 wavelet, only used in snow", 0, FF_OPT_TYPE_CONST, FF_CMP_W97, INT_MIN, INT_MAX, V|E, "cmp_func"},

  623. #endif

  624. {"dctmax", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_DCTMAX, INT_MIN, INT_MAX, V|E, "cmp_func"},

  625. {"chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_CHROMA, INT_MIN, INT_MAX, V|E, "cmp_func"},

  626. {"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},

  627. {"subq", "sub pel motion estimation quality", OFFSET(me_subpel_quality), FF_OPT_TYPE_INT, 8, INT_MIN, INT_MAX, V|E},

  628. {"dtg_active_format", NULL, OFFSET(dtg_active_format), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  629. {"me_range", "limit motion vectors range (1023 for DivX player)", OFFSET(me_range), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  630. {"ibias", "intra quant bias", OFFSET(intra_quant_bias), FF_OPT_TYPE_INT, FF_DEFAULT_QUANT_BIAS, INT_MIN, INT_MAX, V|E},

  631. {"pbias", "inter quant bias", OFFSET(inter_quant_bias), FF_OPT_TYPE_INT, FF_DEFAULT_QUANT_BIAS, INT_MIN, INT_MAX, V|E},

  632. {"color_table_id", NULL, OFFSET(color_table_id), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  633. {"internal_buffer_count", NULL, OFFSET(internal_buffer_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  634. {"global_quality", NULL, OFFSET(global_quality), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  635. {"coder", NULL, OFFSET(coder_type), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "coder"},

  636. {"vlc", "variable length coder / huffman coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_VLC, INT_MIN, INT_MAX, V|E, "coder"},

  637. {"ac", "arithmetic coder", 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_AC, INT_MIN, INT_MAX, V|E, "coder"},

  638. {"context", "context model", OFFSET(context_model), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  639. {"slice_flags", NULL, OFFSET(slice_flags), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  640. {"xvmc_acceleration", NULL, OFFSET(xvmc_acceleration), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  641. {"mbd", "macroblock decision algorithm (high quality mode)", OFFSET(mb_decision), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "mbd"},

  642. {"simple", "use mbcmp (default)", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_SIMPLE, INT_MIN, INT_MAX, V|E, "mbd"},

  643. {"bits", "use fewest bits", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_BITS, INT_MIN, INT_MAX, V|E, "mbd"},

  644. {"rd", "use best rate distortion", 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_RD, INT_MIN, INT_MAX, V|E, "mbd"},

  645. {"stream_codec_tag", NULL, OFFSET(stream_codec_tag), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  646. {"sc_threshold", "scene change threshold", OFFSET(scenechange_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  647. {"lmin", "min lagrange factor (VBR)", OFFSET(lmin), FF_OPT_TYPE_INT,  2*FF_QP2LAMBDA, 0, INT_MAX, V|E},

  648. {"lmax", "max lagrange factor (VBR)", OFFSET(lmax), FF_OPT_TYPE_INT, 31*FF_QP2LAMBDA, 0, INT_MAX, V|E},

  649. {"nr", "noise reduction", OFFSET(noise_reduction), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  650. {"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},

  651. {"inter_threshold", NULL, OFFSET(inter_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  652. {"flags2", NULL, OFFSET(flags2), FF_OPT_TYPE_FLAGS, CODEC_FLAG2_FASTPSKIP, INT_MIN, INT_MAX, V|A|E|D, "flags2"},

  653. {"error", NULL, OFFSET(error_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  654. {"antialias", "MP3 antialias algorithm", OFFSET(antialias_algo), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D, "aa"},

  655. {"auto", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_AUTO, INT_MIN, INT_MAX, V|D, "aa"},

  656. {"fastint", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_FASTINT, INT_MIN, INT_MAX, V|D, "aa"},

  657. {"int", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_INT, INT_MIN, INT_MAX, V|D, "aa"},

  658. {"float", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_FLOAT, INT_MIN, INT_MAX, V|D, "aa"},

  659. {"qns", "quantizer noise shaping", OFFSET(quantizer_noise_shaping), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  660. {"threads", NULL, OFFSET(thread_count), FF_OPT_TYPE_INT, 1, INT_MIN, INT_MAX, V|E|D},

  661. {"me_threshold", "motion estimaton threshold", OFFSET(me_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  662. {"mb_threshold", "macroblock threshold", OFFSET(mb_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  663. {"dc", "intra_dc_precision", OFFSET(intra_dc_precision), FF_OPT_TYPE_INT, 0, INT_MIN, INT_MAX, V|E},

  664. {"nssew", "nsse weight", OFFSET(nsse_weight), FF_OPT_TYPE_INT, 8, INT_MIN, INT_MAX, V|E},

  665. {"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},

  666. {"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},

  667. {"profile", NULL, OFFSET(profile), FF_OPT_TYPE_INT, FF_PROFILE_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "profile"},

  668. {"unknown", NULL, 0, FF_OPT_TYPE_CONST, FF_PROFILE_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "profile"},

  669. {"level", NULL, OFFSET(level), FF_OPT_TYPE_INT, FF_LEVEL_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "level"},

  670. {"unknown", NULL, 0, FF_OPT_TYPE_CONST, FF_LEVEL_UNKNOWN, INT_MIN, INT_MAX, V|A|E, "level"},

  671. {"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},

  672. {"skip_threshold", "frame skip threshold", OFFSET(frame_skip_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  673. {"skip_factor", "frame skip factor", OFFSET(frame_skip_factor), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  674. {"skip_exp", "frame skip exponent", OFFSET(frame_skip_exp), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  675. {"skipcmp", "frame skip compare function", OFFSET(frame_skip_cmp), FF_OPT_TYPE_INT, FF_CMP_DCTMAX, INT_MIN, INT_MAX, V|E, "cmp_func"},

  676. {"border_mask", "increases the quantizer for macroblocks close to borders", OFFSET(border_masking), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},

  677. {"mblmin", "min macroblock lagrange factor (VBR)", OFFSET(mb_lmin), FF_OPT_TYPE_INT, FF_QP2LAMBDA * 2, 1, FF_LAMBDA_MAX, V|E},

  678. {"mblmax", "max macroblock lagrange factor (VBR)", OFFSET(mb_lmax), FF_OPT_TYPE_INT, FF_QP2LAMBDA * 31, 1, FF_LAMBDA_MAX, V|E},

  679. {"mepc", "motion estimation bitrate penalty compensation (1.0 = 256)", OFFSET(me_penalty_compensation), FF_OPT_TYPE_INT, 256, INT_MIN, INT_MAX, V|E},

  680. {"bidir_refine", "refine the two motion vectors used in bidirectional macroblocks", OFFSET(bidir_refine), FF_OPT_TYPE_INT, DEFAULT, 0, 4, V|E},

  681. {"brd_scale", "downscales frames for dynamic B-frame decision", OFFSET(brd_scale), FF_OPT_TYPE_INT, DEFAULT, 0, 10, V|E},

  682. {"crf", "enables constant quality mode, and selects the quality (x264)", OFFSET(crf), FF_OPT_TYPE_FLOAT, DEFAULT, 0, 51, V|E},

  683. {"cqp", "constant quantization parameter rate control method", OFFSET(cqp), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, V|E},

  684. {"keyint_min", "minimum interval between IDR-frames (x264)", OFFSET(keyint_min), FF_OPT_TYPE_INT, 25, INT_MIN, INT_MAX, V|E},

  685. {"refs", "reference frames to consider for motion compensation (Snow)", OFFSET(refs), FF_OPT_TYPE_INT, 1, INT_MIN, INT_MAX, V|E},

  686. {"chromaoffset", "chroma qp offset from luma", OFFSET(chromaoffset), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  687. {"bframebias", "influences how often B-frames are used", OFFSET(bframebias), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  688. {"trellis", "rate-distortion optimal quantization", OFFSET(trellis), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|A|E},

  689. {"directpred", "direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)", OFFSET(directpred), FF_OPT_TYPE_INT, 2, INT_MIN, INT_MAX, V|E},

  690. {"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"},

  691. {"wpred", "weighted biprediction for b-frames (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_WPRED, INT_MIN, INT_MAX, V|E, "flags2"},

  692. {"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"},

  693. {"8x8dct", "high profile 8x8 transform (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_8X8DCT, INT_MIN, INT_MAX, V|E, "flags2"},

  694. {"fastpskip", "fast pskip (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_FASTPSKIP, INT_MIN, INT_MAX, V|E, "flags2"},

  695. {"aud", "access unit delimiters (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_AUD, INT_MIN, INT_MAX, V|E, "flags2"},

  696. {"brdo", "b-frame rate-distortion optimization", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_BRDO, INT_MIN, INT_MAX, V|E, "flags2"},

  697. {"skiprd", "RD optimal MB level residual skiping", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_SKIP_RD, INT_MIN, INT_MAX, V|E, "flags2"},

  698. {"complexityblur", "reduce fluctuations in qp (before curve compression)", OFFSET(complexityblur), FF_OPT_TYPE_FLOAT, 20.0, FLT_MIN, FLT_MAX, V|E},

  699. {"deblockalpha", "in-loop deblocking filter alphac0 parameter", OFFSET(deblockalpha), FF_OPT_TYPE_INT, DEFAULT, -6, 6, V|E},

  700. {"deblockbeta", "in-loop deblocking filter beta parameter", OFFSET(deblockbeta), FF_OPT_TYPE_INT, DEFAULT, -6, 6, V|E},

  701. {"partitions", "macroblock subpartition sizes to consider", OFFSET(partitions), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, V|E, "partitions"},

  702. {"parti4x4", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_I4X4, INT_MIN, INT_MAX, V|E, "partitions"},

  703. {"parti8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_I8X8, INT_MIN, INT_MAX, V|E, "partitions"},

  704. {"partp4x4", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_P4X4, INT_MIN, INT_MAX, V|E, "partitions"},

  705. {"partp8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_P8X8, INT_MIN, INT_MAX, V|E, "partitions"},

  706. {"partb8x8", NULL, 0, FF_OPT_TYPE_CONST, X264_PART_B8X8, INT_MIN, INT_MAX, V|E, "partitions"},

  707. {"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},

  708. {"mv0_threshold", NULL, OFFSET(mv0_threshold), FF_OPT_TYPE_INT, 256, 0, INT_MAX, V|E},

  709. {"ivlc", "intra vlc table", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_INTRA_VLC, INT_MIN, INT_MAX, V|E, "flags2"},

  710. {"b_sensitivity", "adjusts sensitivity of b_frame_strategy 1", OFFSET(b_sensitivity), FF_OPT_TYPE_INT, 40, 1, INT_MAX, V|E},

  711. {"compression_level", NULL, OFFSET(compression_level), FF_OPT_TYPE_INT, FF_COMPRESSION_DEFAULT, INT_MIN, INT_MAX, V|A|E},

  712. {"use_lpc", "sets whether to use LPC mode (FLAC)", OFFSET(use_lpc), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},

  713. {"lpc_coeff_precision", "LPC coefficient precision (FLAC)", OFFSET(lpc_coeff_precision), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|E},

  714. {"min_prediction_order", NULL, OFFSET(min_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},

  715. {"max_prediction_order", NULL, OFFSET(max_prediction_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},

  716. {"prediction_order_method", "search method for selecting prediction order", OFFSET(prediction_order_method), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},

  717. {"min_partition_order", NULL, OFFSET(min_partition_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},

  718. {"max_partition_order", NULL, OFFSET(max_partition_order), FF_OPT_TYPE_INT, -1, INT_MIN, INT_MAX, A|E},

  719. {"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},

  720. {"drop_frame_timecode", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_DROP_FRAME_TIMECODE, INT_MIN, INT_MAX, V|E, "flags2"},

  721. {NULL},

  722. };

  723. 

  724. #undef A

  725. #undef V

  726. #undef S

  727. #undef E

  728. #undef D

  729. #undef DEFAULT

  730. 

  731. static AVClass av_codec_context_class = { "AVCodecContext", context_to_name, options };

  732. 

  733. void avcodec_get_context_defaults(AVCodecContext *s){

  734.     memset(s, 0, sizeof(AVCodecContext));

  735. 

  736.     s->av_class= &av_codec_context_class;

  737. 

  738.     av_opt_set_defaults(s);

  739. 

  740.     s->rc_eq= "tex^qComp";

  741.     s->time_base= (AVRational){0,1};

  742.     s->get_buffer= avcodec_default_get_buffer;

  743.     s->release_buffer= avcodec_default_release_buffer;

  744.     s->get_format= avcodec_default_get_format;

  745.     s->execute= avcodec_default_execute;

  746.     s->sample_aspect_ratio= (AVRational){0,1};

  747.     s->pix_fmt= PIX_FMT_NONE;

  748.     s->sample_fmt= SAMPLE_FMT_S16; // FIXME: set to NONE

  749. 

  750.     s->palctrl = NULL;

  751.     s->reget_buffer= avcodec_default_reget_buffer;

  752. }

  753. 

  754. AVCodecContext *avcodec_alloc_context(void){

  755.     AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));

  756. 

  757.     if(avctx==NULL) return NULL;

  758. 

  759.     avcodec_get_context_defaults(avctx);

  760. 

  761.     return avctx;

  762. }

  763. 

  764. void avcodec_get_frame_defaults(AVFrame *pic){

  765.     memset(pic, 0, sizeof(AVFrame));

  766. 

  767.     pic->pts= AV_NOPTS_VALUE;

  768.     pic->key_frame= 1;

  769. }

  770. 

  771. AVFrame *avcodec_alloc_frame(void){

  772.     AVFrame *pic= av_malloc(sizeof(AVFrame));

  773. 

  774.     if(pic==NULL) return NULL;

  775. 

  776.     avcodec_get_frame_defaults(pic);

  777. 

  778.     return pic;

  779. }

  780. 

  781. int avcodec_open(AVCodecContext *avctx, AVCodec *codec)

  782. {

  783.     int ret= -1;

  784. 

  785.     entangled_thread_counter++;

  786.     if(entangled_thread_counter != 1){

  787.         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");

  788.         goto end;

  789.     }

  790. 

  791.     if(avctx->codec)

  792.         goto end;

  793. 

  794.     if (codec->priv_data_size > 0) {

  795.         avctx->priv_data = av_mallocz(codec->priv_data_size);

  796.         if (!avctx->priv_data)

  797.             goto end;

  798.     } else {

  799.         avctx->priv_data = NULL;

  800.     }

  801. 

  802.     if(avctx->coded_width && avctx->coded_height)

  803.         avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);

  804.     else if(avctx->width && avctx->height)

  805.         avcodec_set_dimensions(avctx, avctx->width, avctx->height);

  806. 

  807.     if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){

  808.         av_freep(&avctx->priv_data);

  809.         goto end;

  810.     }

  811. 

  812.     avctx->codec = codec;

  813.     avctx->codec_id = codec->id;

  814.     avctx->frame_number = 0;

  815.     ret = avctx->codec->init(avctx);

  816.     if (ret < 0) {

  817.         av_freep(&avctx->priv_data);

  818.         avctx->codec= NULL;

  819.         goto end;

  820.     }

  821.     ret=0;

  822. end:

  823.     entangled_thread_counter--;

  824.     return ret;

  825. }

  826. 

  827. int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,

  828.                          const short *samples)

  829. {

  830.     if(buf_size < FF_MIN_BUFFER_SIZE && 0){

  831.         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");

  832.         return -1;

  833.     }

  834.     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){

  835.         int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);

  836.         avctx->frame_number++;

  837.         return ret;

  838.     }else

  839.         return 0;

  840. }

  841. 

  842. int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,

  843.                          const AVFrame *pict)

  844. {

  845.     if(buf_size < FF_MIN_BUFFER_SIZE){

  846.         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");

  847.         return -1;

  848.     }

  849.     if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))

  850.         return -1;

  851.     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){

  852.         int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);

  853.         avctx->frame_number++;

  854.         emms_c(); //needed to avoid an emms_c() call before every return;

  855. 

  856.         return ret;

  857.     }else

  858.         return 0;

  859. }

  860. 

  861. int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,

  862.                             const AVSubtitle *sub)

  863. {

  864.     int ret;

  865.     ret = avctx->codec->encode(avctx, buf, buf_size, (void *)sub);

  866.     avctx->frame_number++;

  867.     return ret;

  868. }

  869. 

  870. int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,

  871.                          int *got_picture_ptr,

  872.                          uint8_t *buf, int buf_size)

  873. {

  874.     int ret;

  875. 

  876.     *got_picture_ptr= 0;

  877.     if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))

  878.         return -1;

  879.     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){

  880.         ret = avctx->codec->decode(avctx, picture, got_picture_ptr,

  881.                                 buf, buf_size);

  882. 

  883.         emms_c(); //needed to avoid an emms_c() call before every return;

  884. 

  885.         if (*got_picture_ptr)

  886.             avctx->frame_number++;

  887.     }else

  888.         ret= 0;

  889. 

  890.     return ret;

  891. }

  892. 

  893. int avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,

  894.                          int *frame_size_ptr,

  895.                          uint8_t *buf, int buf_size)

  896. {

  897.     int ret;

  898. 

  899.     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){

  900.         //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough

  901.         if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){

  902.             av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");

  903.             return -1;

  904.         }

  905.         if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||

  906.         *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t) ||

  907.         *frame_size_ptr < buf_size){

  908.             av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);

  909.             return -1;

  910.         }

  911. 

  912.         ret = avctx->codec->decode(avctx, samples, frame_size_ptr,

  913.                                 buf, buf_size);

  914.         avctx->frame_number++;

  915.     }else{

  916.         ret= 0;

  917.         *frame_size_ptr=0;

  918.     }

  919.     return ret;

  920. }

  921. 

  922. #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)

  923. int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,

  924.                          int *frame_size_ptr,

  925.                          uint8_t *buf, int buf_size){

  926.     *frame_size_ptr= AVCODEC_MAX_AUDIO_FRAME_SIZE;

  927.     return avcodec_decode_audio2(avctx, samples, frame_size_ptr, buf, buf_size);

  928. }

  929. #endif

  930. 

  931. int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,

  932.                             int *got_sub_ptr,

  933.                             const uint8_t *buf, int buf_size)

  934. {

  935.     int ret;

  936. 

  937.     *got_sub_ptr = 0;

  938.     ret = avctx->codec->decode(avctx, sub, got_sub_ptr,

  939.                                (uint8_t *)buf, buf_size);

  940.     if (*got_sub_ptr)

  941.         avctx->frame_number++;

  942.     return ret;

  943. }

  944. 

  945. int avcodec_close(AVCodecContext *avctx)

  946. {

  947.     entangled_thread_counter++;

  948.     if(entangled_thread_counter != 1){

  949.         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");

  950.         entangled_thread_counter--;

  951.         return -1;

  952.     }

  953. 

  954.     if (avctx->codec->close)

  955.         avctx->codec->close(avctx);

  956.     avcodec_default_free_buffers(avctx);

  957.     av_freep(&avctx->priv_data);

  958.     avctx->codec = NULL;

  959.     entangled_thread_counter--;

  960.     return 0;

  961. }

  962. 

  963. AVCodec *avcodec_find_encoder(enum CodecID id)

  964. {

  965.     AVCodec *p;

  966.     p = first_avcodec;

  967.     while (p) {

  968.         if (p->encode != NULL && p->id == id)

  969.             return p;

  970.         p = p->next;

  971.     }

  972.     return NULL;

  973. }

  974. 

  975. AVCodec *avcodec_find_encoder_by_name(const char *name)

  976. {

  977.     AVCodec *p;

  978.     p = first_avcodec;

  979.     while (p) {

  980.         if (p->encode != NULL && strcmp(name,p->name) == 0)

  981.             return p;

  982.         p = p->next;

  983.     }

  984.     return NULL;

  985. }

  986. 

  987. AVCodec *avcodec_find_decoder(enum CodecID id)

  988. {

  989.     AVCodec *p;

  990.     p = first_avcodec;

  991.     while (p) {

  992.         if (p->decode != NULL && p->id == id)

  993.             return p;

  994.         p = p->next;

  995.     }

  996.     return NULL;

  997. }

  998. 

  999. AVCodec *avcodec_find_decoder_by_name(const char *name)

  1000. {

  1001.     AVCodec *p;

  1002.     p = first_avcodec;

  1003.     while (p) {

  1004.         if (p->decode != NULL && strcmp(name,p->name) == 0)

  1005.             return p;

  1006.         p = p->next;

  1007.     }

  1008.     return NULL;

  1009. }

  1010. 

  1011. void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)

  1012. {

  1013.     const char *codec_name;

  1014.     AVCodec *p;

  1015.     char buf1[32];

  1016.     char channels_str[100];

  1017.     int bitrate;

  1018. 

  1019.     if (encode)

  1020.         p = avcodec_find_encoder(enc->codec_id);

  1021.     else

  1022.         p = avcodec_find_decoder(enc->codec_id);

  1023. 

  1024.     if (p) {

  1025.         codec_name = p->name;

  1026.         if (!encode && enc->codec_id == CODEC_ID_MP3) {

  1027.             if (enc->sub_id == 2)

  1028.                 codec_name = "mp2";

  1029.             else if (enc->sub_id == 1)

  1030.                 codec_name = "mp1";

  1031.         }

  1032.     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {

  1033.         /* fake mpeg2 transport stream codec (currently not

  1034.            registered) */

  1035.         codec_name = "mpeg2ts";

  1036.     } else if (enc->codec_name[0] != '\0') {

  1037.         codec_name = enc->codec_name;

  1038.     } else {

  1039.         /* output avi tags */

  1040.         if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)

  1041.            && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){

  1042.             snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",

  1043.                      enc->codec_tag & 0xff,

  1044.                      (enc->codec_tag >> 8) & 0xff,

  1045.                      (enc->codec_tag >> 16) & 0xff,

  1046.                      (enc->codec_tag >> 24) & 0xff,

  1047.                       enc->codec_tag);

  1048.         } else {

  1049.             snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);

  1050.         }

  1051.         codec_name = buf1;

  1052.     }

  1053. 

  1054.     switch(enc->codec_type) {

  1055.     case CODEC_TYPE_VIDEO:

  1056.         snprintf(buf, buf_size,

  1057.                  "Video: %s%s",

  1058.                  codec_name, enc->mb_decision ? " (hq)" : "");

  1059.         if (enc->pix_fmt != PIX_FMT_NONE) {

  1060.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1061.                      ", %s",

  1062.                      avcodec_get_pix_fmt_name(enc->pix_fmt));

  1063.         }

  1064.         if (enc->width) {

  1065.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1066.                      ", %dx%d",

  1067.                      enc->width, enc->height);

  1068.             if(av_log_level >= AV_LOG_DEBUG){

  1069.                 int g= ff_gcd(enc->time_base.num, enc->time_base.den);

  1070.                 snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1071.                      ", %d/%d",

  1072.                      enc->time_base.num/g, enc->time_base.den/g);

  1073.             }

  1074.         }

  1075.         if (encode) {

  1076.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1077.                      ", q=%d-%d", enc->qmin, enc->qmax);

  1078.         }

  1079.         bitrate = enc->bit_rate;

  1080.         break;

  1081.     case CODEC_TYPE_AUDIO:

  1082.         snprintf(buf, buf_size,

  1083.                  "Audio: %s",

  1084.                  codec_name);

  1085.         switch (enc->channels) {

  1086.             case 1:

  1087.                 strcpy(channels_str, "mono");

  1088.                 break;

  1089.             case 2:

  1090.                 strcpy(channels_str, "stereo");

  1091.                 break;

  1092.             case 6:

  1093.                 strcpy(channels_str, "5:1");

  1094.                 break;

  1095.             default:

  1096.                 snprintf(channels_str, sizeof(channels_str), "%d channels", enc->channels);

  1097.                 break;

  1098.         }

  1099.         if (enc->sample_rate) {

  1100.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1101.                      ", %d Hz, %s",

  1102.                      enc->sample_rate,

  1103.                      channels_str);

  1104.         }

  1105. 

  1106.         /* for PCM codecs, compute bitrate directly */

  1107.         switch(enc->codec_id) {

  1108.         case CODEC_ID_PCM_S32LE:

  1109.         case CODEC_ID_PCM_S32BE:

  1110.         case CODEC_ID_PCM_U32LE:

  1111.         case CODEC_ID_PCM_U32BE:

  1112.             bitrate = enc->sample_rate * enc->channels * 32;

  1113.             break;

  1114.         case CODEC_ID_PCM_S24LE:

  1115.         case CODEC_ID_PCM_S24BE:

  1116.         case CODEC_ID_PCM_U24LE:

  1117.         case CODEC_ID_PCM_U24BE:

  1118.         case CODEC_ID_PCM_S24DAUD:

  1119.             bitrate = enc->sample_rate * enc->channels * 24;

  1120.             break;

  1121.         case CODEC_ID_PCM_S16LE:

  1122.         case CODEC_ID_PCM_S16BE:

  1123.         case CODEC_ID_PCM_U16LE:

  1124.         case CODEC_ID_PCM_U16BE:

  1125.             bitrate = enc->sample_rate * enc->channels * 16;

  1126.             break;

  1127.         case CODEC_ID_PCM_S8:

  1128.         case CODEC_ID_PCM_U8:

  1129.         case CODEC_ID_PCM_ALAW:

  1130.         case CODEC_ID_PCM_MULAW:

  1131.             bitrate = enc->sample_rate * enc->channels * 8;

  1132.             break;

  1133.         default:

  1134.             bitrate = enc->bit_rate;

  1135.             break;

  1136.         }

  1137.         break;

  1138.     case CODEC_TYPE_DATA:

  1139.         snprintf(buf, buf_size, "Data: %s", codec_name);

  1140.         bitrate = enc->bit_rate;

  1141.         break;

  1142.     case CODEC_TYPE_SUBTITLE:

  1143.         snprintf(buf, buf_size, "Subtitle: %s", codec_name);

  1144.         bitrate = enc->bit_rate;

  1145.         break;

  1146.     default:

  1147.         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);

  1148.         return;

  1149.     }

  1150.     if (encode) {

  1151.         if (enc->flags & CODEC_FLAG_PASS1)

  1152.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1153.                      ", pass 1");

  1154.         if (enc->flags & CODEC_FLAG_PASS2)

  1155.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1156.                      ", pass 2");

  1157.     }

  1158.     if (bitrate != 0) {

  1159.         snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1160.                  ", %d kb/s", bitrate / 1000);

  1161.     }

  1162. }

  1163. 

  1164. unsigned avcodec_version( void )

  1165. {

  1166.   return LIBAVCODEC_VERSION_INT;

  1167. }

  1168. 

  1169. unsigned avcodec_build( void )

  1170. {

  1171.   return LIBAVCODEC_BUILD;

  1172. }

  1173. 

  1174. static void init_crcs(void){

  1175.     av_crc04C11DB7= av_mallocz_static(sizeof(AVCRC) * 257);

  1176.     av_crc8005    = av_mallocz_static(sizeof(AVCRC) * 257);

  1177.     av_crc07      = av_mallocz_static(sizeof(AVCRC) * 257);

  1178.     av_crc_init(av_crc04C11DB7, 0, 32, 0x04c11db7, sizeof(AVCRC)*257);

  1179.     av_crc_init(av_crc8005    , 0, 16, 0x8005    , sizeof(AVCRC)*257);

  1180.     av_crc_init(av_crc07      , 0,  8, 0x07      , sizeof(AVCRC)*257);

  1181. }

  1182. 

  1183. void avcodec_init(void)

  1184. {

  1185.     static int inited = 0;

  1186. 

  1187.     if (inited != 0)

  1188.         return;

  1189.     inited = 1;

  1190. 

  1191.     dsputil_static_init();

  1192.     init_crcs();

  1193. }

  1194. 

  1195. void avcodec_flush_buffers(AVCodecContext *avctx)

  1196. {

  1197.     if(avctx->codec->flush)

  1198.         avctx->codec->flush(avctx);

  1199. }

  1200. 

  1201. void avcodec_default_free_buffers(AVCodecContext *s){

  1202.     int i, j;

  1203. 

  1204.     if(s->internal_buffer==NULL) return;

  1205. 

  1206.     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){

  1207.         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];

  1208.         for(j=0; j<4; j++){

  1209.             av_freep(&buf->base[j]);

  1210.             buf->data[j]= NULL;

  1211.         }

  1212.     }

  1213.     av_freep(&s->internal_buffer);

  1214. 

  1215.     s->internal_buffer_count=0;

  1216. }

  1217. 

  1218. char av_get_pict_type_char(int pict_type){

  1219.     switch(pict_type){

  1220.     case I_TYPE: return 'I';

  1221.     case P_TYPE: return 'P';

  1222.     case B_TYPE: return 'B';

  1223.     case S_TYPE: return 'S';

  1224.     case SI_TYPE:return 'i';

  1225.     case SP_TYPE:return 'p';

  1226.     default:     return '?';

  1227.     }

  1228. }

  1229. 

  1230. int av_get_bits_per_sample(enum CodecID codec_id){

  1231.     switch(codec_id){

  1232.     case CODEC_ID_ADPCM_SBPRO_2:

  1233.         return 2;

  1234.     case CODEC_ID_ADPCM_SBPRO_3:

  1235.         return 3;

  1236.     case CODEC_ID_ADPCM_SBPRO_4:

  1237.     case CODEC_ID_ADPCM_CT:

  1238.         return 4;

  1239.     case CODEC_ID_PCM_ALAW:

  1240.     case CODEC_ID_PCM_MULAW:

  1241.     case CODEC_ID_PCM_S8:

  1242.     case CODEC_ID_PCM_U8:

  1243.         return 8;

  1244.     case CODEC_ID_PCM_S16BE:

  1245.     case CODEC_ID_PCM_S16LE:

  1246.     case CODEC_ID_PCM_U16BE:

  1247.     case CODEC_ID_PCM_U16LE:

  1248.         return 16;

  1249.     case CODEC_ID_PCM_S24DAUD:

  1250.     case CODEC_ID_PCM_S24BE:

  1251.     case CODEC_ID_PCM_S24LE:

  1252.     case CODEC_ID_PCM_U24BE:

  1253.     case CODEC_ID_PCM_U24LE:

  1254.         return 24;

  1255.     case CODEC_ID_PCM_S32BE:

  1256.     case CODEC_ID_PCM_S32LE:

  1257.     case CODEC_ID_PCM_U32BE:

  1258.     case CODEC_ID_PCM_U32LE:

  1259.         return 32;

  1260.     default:

  1261.         return 0;

  1262.     }

  1263. }

  1264. 

  1265. #if !defined(HAVE_THREADS)

  1266. int avcodec_thread_init(AVCodecContext *s, int thread_count){

  1267.     return -1;

  1268. }

  1269. #endif

  1270. 

  1271. unsigned int av_xiphlacing(unsigned char *s, unsigned int v)

  1272. {

  1273.     unsigned int n = 0;

  1274. 

  1275.     while(v >= 0xff) {

  1276.         *s++ = 0xff;

  1277.         v -= 0xff;

  1278.         n++;

  1279.     }

  1280.     *s = v;

  1281.     n++;

  1282.     return n;

  1283. }

  1284. 

  1285. /* Wrapper to work around the lack of mkstemp() on mingw/cygin.

  1286.  * Also, tries to create file in /tmp first, if possible.

  1287.  * *prefix can be a character constant; *filename will be allocated internally.

  1288.  * Returns file descriptor of opened file (or -1 on error)

  1289.  * and opened file name in **filename. */

  1290. int av_tempfile(char *prefix, char **filename) {

  1291.     int fd=-1;

  1292. #ifdef __MINGW32__

  1293.     *filename = tempnam(".", prefix);

  1294. #else

  1295.     size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */

  1296.     *filename = av_malloc(len);

  1297. #endif

  1298.     /* -----common section-----*/

  1299.     if (*filename == NULL) {

  1300.         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");

  1301.         return -1;

  1302.     }

  1303. #ifdef __MINGW32__

  1304.     fd = open(*filename, _O_RDWR | _O_BINARY | _O_CREAT, 0444);

  1305. #else

  1306.     snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);

  1307.     fd = mkstemp(*filename);

  1308.     if (fd < 0) {

  1309.         snprintf(*filename, len, "./%sXXXXXX", prefix);

  1310.         fd = mkstemp(*filename);

  1311.     }

  1312. #endif

  1313.     /* -----common section-----*/

  1314.     if (fd < 0) {

  1315.         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);

  1316.         return -1;

  1317.     }

  1318.     return fd; /* success */

  1319. }