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FFmpeg/libavcodec/utils.c

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  1. /*

  2.  * utils for libavcodec

  3.  * Copyright (c) 2001 Fabrice Bellard.

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

  5.  *

  6.  * This library is free software; you can redistribute it and/or

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

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

  9.  * version 2 of the License, or (at your option) any later version.

  10.  *

  11.  * This library is distributed in the hope that it will be useful,

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

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

  14.  * Lesser General Public License for more details.

  15.  *

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

  17.  * License along with this library; if not, write to the Free Software

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

  19.  */

  20. 

  21. /**

  22.  * @file utils.c

  23.  * utils.

  24.  */

  25. 

  26. #include "avcodec.h"

  27. #include "dsputil.h"

  28. #include "mpegvideo.h"

  29. #include "integer.h"

  30. #include "opt.h"

  31. #include "crc.h"

  32. #include <stdarg.h>

  33. #include <limits.h>

  34. #include <float.h>

  35. #ifdef __MINGW32__

  36. #include <fcntl.h>

  37. #endif

  38. 

  39. const uint8_t ff_reverse[256]={

  40. 0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,

  41. 0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,

  42. 0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,

  43. 0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,

  44. 0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,

  45. 0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,

  46. 0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,

  47. 0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,

  48. 0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,

  49. 0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,

  50. 0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,

  51. 0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,

  52. 0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,

  53. 0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,

  54. 0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,

  55. 0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,

  56. };

  57. 

  58. static int volatile entangled_thread_counter=0;

  59. 

  60. void avcodec_default_free_buffers(AVCodecContext *s);

  61. 

  62. void *av_mallocz(unsigned int size)

  63. {

  64.     void *ptr;

  65. 

  66.     ptr = av_malloc(size);

  67.     if (!ptr)

  68.         return NULL;

  69.     memset(ptr, 0, size);

  70.     return ptr;

  71. }

  72. 

  73. char *av_strdup(const char *s)

  74. {

  75.     char *ptr;

  76.     int len;

  77.     len = strlen(s) + 1;

  78.     ptr = av_malloc(len);

  79.     if (!ptr)

  80.         return NULL;

  81.     memcpy(ptr, s, len);

  82.     return ptr;

  83. }

  84. 

  85. /**

  86.  * realloc which does nothing if the block is large enough

  87.  */

  88. void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)

  89. {

  90.     if(min_size < *size)

  91.         return ptr;

  92. 

  93.     *size= FFMAX(17*min_size/16 + 32, min_size);

  94. 

  95.     return av_realloc(ptr, *size);

  96. }

  97. 

  98. 

  99. static unsigned int last_static = 0;

  100. static unsigned int allocated_static = 0;

  101. static void** array_static = NULL;

  102. 

  103. /**

  104.  * allocation of static arrays - do not use for normal allocation.

  105.  */

  106. void *av_mallocz_static(unsigned int size)

  107. {

  108.     void *ptr = av_mallocz(size);

  109. 

  110.     if(ptr){

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

  112.         if(!array_static)

  113.             return NULL;

  114.         array_static[last_static++] = ptr;

  115.     }

  116. 

  117.     return ptr;

  118. }

  119. 

  120. /**

  121.  * same as above, but does realloc

  122.  */

  123. 

  124. void *av_realloc_static(void *ptr, unsigned int size)

  125. {

  126.     int i;

  127.     if(!ptr)

  128.       return av_mallocz_static(size);

  129.     /* Look for the old ptr */

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

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

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

  133.             return array_static[i];

  134.         }

  135.     }

  136.     return NULL;

  137. 

  138. }

  139. 

  140. /**

  141.  * free all static arrays and reset pointers to 0.

  142.  */

  143. void av_free_static(void)

  144. {

  145.     while(last_static){

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

  147.     }

  148.     av_freep(&array_static);

  149. }

  150. 

  151. /**

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

  153.  */

  154. 

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

  156. 

  157. static void do_free(void)

  158. {

  159.     av_free_static();

  160. }

  161. 

  162. /**

  163.  * Frees memory and sets the pointer to NULL.

  164.  * @param arg pointer to the pointer which should be freed

  165.  */

  166. void av_freep(void *arg)

  167. {

  168.     void **ptr= (void**)arg;

  169.     av_free(*ptr);

  170.     *ptr = NULL;

  171. }

  172. 

  173. /* encoder management */

  174. AVCodec *first_avcodec = NULL;

  175. 

  176. void register_avcodec(AVCodec *format)

  177. {

  178.     AVCodec **p;

  179.     p = &first_avcodec;

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

  181.     *p = format;

  182.     format->next = NULL;

  183. }

  184. 

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

  186.     s->coded_width = width;

  187.     s->coded_height= height;

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

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

  190. }

  191. 

  192. typedef struct InternalBuffer{

  193.     int last_pic_num;

  194.     uint8_t *base[4];

  195.     uint8_t *data[4];

  196.     int linesize[4];

  197. }InternalBuffer;

  198. 

  199. #define INTERNAL_BUFFER_SIZE 32

  200. 

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

  202. 

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

  204.     int w_align= 1;

  205.     int h_align= 1;

  206. 

  207.     switch(s->pix_fmt){

  208.     case PIX_FMT_YUV420P:

  209.     case PIX_FMT_YUV422:

  210.     case PIX_FMT_UYVY422:

  211.     case PIX_FMT_YUV422P:

  212.     case PIX_FMT_YUV444P:

  213.     case PIX_FMT_GRAY8:

  214.     case PIX_FMT_YUVJ420P:

  215.     case PIX_FMT_YUVJ422P:

  216.     case PIX_FMT_YUVJ444P:

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

  218.         h_align= 16;

  219.         break;

  220.     case PIX_FMT_YUV411P:

  221.     case PIX_FMT_UYVY411:

  222.         w_align=32;

  223.         h_align=8;

  224.         break;

  225.     case PIX_FMT_YUV410P:

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

  227.             w_align=64;

  228.             h_align=64;

  229.         }

  230.     case PIX_FMT_RGB555:

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

  232.             w_align=4;

  233.             h_align=4;

  234.         }

  235.     case PIX_FMT_PAL8:

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

  237.             w_align=4;

  238.             h_align=4;

  239.         }

  240.         break;

  241.     case PIX_FMT_BGR24:

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

  243.             w_align=4;

  244.             h_align=4;

  245.         }

  246.         break;

  247.     default:

  248.         w_align= 1;

  249.         h_align= 1;

  250.         break;

  251.     }

  252. 

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

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

  255. }

  256. 

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

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

  259.         return 0;

  260. 

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

  262.     return -1;

  263. }

  264. 

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

  266.     int i;

  267.     int w= s->width;

  268.     int h= s->height;

  269.     InternalBuffer *buf;

  270.     int *picture_number;

  271. 

  272.     assert(pic->data[0]==NULL);

  273.     assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);

  274. 

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

  276.         return -1;

  277. 

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

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

  280.     }

  281. #if 0

  282.     s->internal_buffer= av_fast_realloc(

  283.         s->internal_buffer,

  284.         &s->internal_buffer_size,

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

  286.         );

  287. #endif

  288. 

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

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

  291.     (*picture_number)++;

  292. 

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

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

  295.         buf->last_pic_num= *picture_number;

  296.     }else{

  297.         int h_chroma_shift, v_chroma_shift;

  298.         int pixel_size, size[3];

  299.         AVPicture picture;

  300. 

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

  302. 

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

  304. 

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

  306.             w+= EDGE_WIDTH*2;

  307.             h+= EDGE_WIDTH*2;

  308.         }

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

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

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

  312.         assert(pixel_size>=1);

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

  314.         if(pixel_size == 3*8)

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

  316.         else

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

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

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

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

  321.         if(picture.data[2])

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

  323.         else

  324.             size[2]= 0;

  325. 

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

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

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

  329. 

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

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

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

  333. 

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

  335. 

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

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

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

  339. 

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

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

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

  343.             else

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

  345.         }

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

  347.     }

  348.     pic->type= FF_BUFFER_TYPE_INTERNAL;

  349. 

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

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

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

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

  354.     }

  355.     s->internal_buffer_count++;

  356. 

  357.     return 0;

  358. }

  359. 

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

  361.     int i;

  362.     InternalBuffer *buf, *last, temp;

  363. 

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

  365.     assert(s->internal_buffer_count);

  366. 

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

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

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

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

  371.             break;

  372.     }

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

  374.     s->internal_buffer_count--;

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

  376. 

  377.     temp= *buf;

  378.     *buf= *last;

  379.     *last= temp;

  380. 

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

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

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

  384.     }

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

  386. }

  387. 

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

  389.     AVFrame temp_pic;

  390.     int i;

  391. 

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

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

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

  395.         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;

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

  397.     }

  398. 

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

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

  401.         return 0;

  402. 

  403.     /*

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

  405.      */

  406.     temp_pic = *pic;

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

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

  409.     pic->opaque = NULL;

  410.     /* Allocate new frame */

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

  412.         return -1;

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

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

  415.              s->height);

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

  417.     return 0;

  418. }

  419. 

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

  421.     int i;

  422. 

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

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

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

  426.     }

  427.     return 0;

  428. }

  429. 

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

  431.     return fmt[0];

  432. }

  433. 

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

  435.     AVCodecContext *avc= ptr;

  436. 

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

  438.         return avc->codec->name;

  439.     else

  440.         return "NULL";

  441. }

  442. 

  443. #define OFFSET(x) (int)&((AVCodecContext*)0)->x

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

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

  446. #define V AV_OPT_FLAG_VIDEO_PARAM

  447. #define A AV_OPT_FLAG_AUDIO_PARAM

  448. #define S AV_OPT_FLAG_SUBTITLE_PARAM

  449. #define E AV_OPT_FLAG_ENCODING_PARAM

  450. #define D AV_OPT_FLAG_DECODING_PARAM

  451. 

  452. static const AVOption options[]={

  453. {"bit_rate", NULL, OFFSET(bit_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|A|E},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  477. {"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"},

  478. {"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"},

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

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

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

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

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

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

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

  486. {"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"},

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

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

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

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

  491. {"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"},

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

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

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

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

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

  497. {"rate_emu", NULL, OFFSET(rate_emu), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  498. {"sample_rate", NULL, OFFSET(sample_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  499. {"channels", NULL, OFFSET(channels), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

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

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

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

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

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

  505. {"qcompress", NULL, OFFSET(qcompress), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

  506. {"qblur", NULL, OFFSET(qblur), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

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

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

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

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

  511. {"b_quant_factor", NULL, OFFSET(b_quant_factor), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

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

  513. {"b_strategy", NULL, OFFSET(b_frame_strategy), FF_OPT_TYPE_INT, 0, INT_MIN, INT_MAX, V|E},

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

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

  516. {"rtp_payload_size", NULL, OFFSET(rtp_payload_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  517. {"mv_bits", NULL, OFFSET(mv_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  518. {"header_bits", NULL, OFFSET(header_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  519. {"i_tex_bits", NULL, OFFSET(i_tex_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  520. {"p_tex_bits", NULL, OFFSET(p_tex_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  521. {"i_count", NULL, OFFSET(i_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  522. {"p_count", NULL, OFFSET(p_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  523. {"skip_count", NULL, OFFSET(skip_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  524. {"misc_bits", NULL, OFFSET(misc_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  525. {"frame_bits", NULL, OFFSET(frame_bits), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  526. {"codec_tag", NULL, OFFSET(codec_tag), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  527. {"bugs", NULL, OFFSET(workaround_bugs), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D, "bug"},

  528. {"autodetect", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AUTODETECT, INT_MIN, INT_MAX, V|D, "bug"},

  529. {"old_msmpeg4", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_OLD_MSMPEG4, INT_MIN, INT_MAX, V|D, "bug"},

  530. {"xvid_ilace", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_XVID_ILACE, INT_MIN, INT_MAX, V|D, "bug"},

  531. {"ump4", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_UMP4, INT_MIN, INT_MAX, V|D, "bug"},

  532. {"no_padding", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_NO_PADDING, INT_MIN, INT_MAX, V|D, "bug"},

  533. {"amv", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AMV, INT_MIN, INT_MAX, V|D, "bug"},

  534. {"ac_vlc", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AC_VLC, INT_MIN, INT_MAX, V|D, "bug"},

  535. {"qpel_chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_QPEL_CHROMA, INT_MIN, INT_MAX, V|D, "bug"},

  536. {"std_qpel", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_STD_QPEL, INT_MIN, INT_MAX, V|D, "bug"},

  537. {"qpel_chroma2", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_QPEL_CHROMA2, INT_MIN, INT_MAX, V|D, "bug"},

  538. {"direct_blocksize", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_DIRECT_BLOCKSIZE, INT_MIN, INT_MAX, V|D, "bug"},

  539. {"edge", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_EDGE, INT_MIN, INT_MAX, V|D, "bug"},

  540. {"hpel_chroma", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_HPEL_CHROMA, INT_MIN, INT_MAX, V|D, "bug"},

  541. {"dc_clip", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_DC_CLIP, INT_MIN, INT_MAX, V|D, "bug"},

  542. {"ms", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_MS, INT_MIN, INT_MAX, V|D, "bug"},

  543. {"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},

  544. {"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},

  545. {"strict", NULL, OFFSET(strict_std_compliance), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "strict"},

  546. {"very", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_VERY_STRICT, INT_MIN, INT_MAX, V|E, "strict"},

  547. {"strict", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_STRICT, INT_MIN, INT_MAX, V|E, "strict"},

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

  549. {"inofficial", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_INOFFICIAL, INT_MIN, INT_MAX, V|E, "strict"},

  550. {"experimental", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_EXPERIMENTAL, INT_MIN, INT_MAX, V|E, "strict"},

  551. {"b_quant_offset", NULL, OFFSET(b_quant_offset), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

  552. {"er", NULL, OFFSET(error_resilience), FF_OPT_TYPE_INT, FF_ER_CAREFUL, INT_MIN, INT_MAX, V|D, "er"},

  553. {"careful", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_CAREFUL, INT_MIN, INT_MAX, V|D, "er"},

  554. {"compliant", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_COMPLIANT, INT_MIN, INT_MAX, V|D, "er"},

  555. {"aggressive", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_AGGRESSIVE, INT_MIN, INT_MAX, V|D, "er"},

  556. {"very_aggressive", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_VERY_AGGRESSIVE, INT_MIN, INT_MAX, V|D, "er"},

  557. {"has_b_frames", NULL, OFFSET(has_b_frames), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  558. {"block_align", NULL, OFFSET(block_align), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  559. {"parse_only", NULL, OFFSET(parse_only), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

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

  561. {"stats_out", NULL, OFFSET(stats_out), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX},

  562. {"stats_in", NULL, OFFSET(stats_in), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX},

  563. {"rc_qsquish", NULL, OFFSET(rc_qsquish), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

  564. {"rc_qmod_amp", NULL, OFFSET(rc_qmod_amp), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

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

  566. {"rc_override_count", NULL, OFFSET(rc_override_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  567. {"rc_eq", NULL, OFFSET(rc_eq), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX, V|E},

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

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

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

  571. {"rc_buf_aggressivity", NULL, OFFSET(rc_buffer_aggressivity), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

  572. {"i_quant_factor", NULL, OFFSET(i_quant_factor), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

  573. {"i_quant_offset", NULL, OFFSET(i_quant_offset), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

  574. {"rc_initial_cplx", NULL, OFFSET(rc_initial_cplx), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

  575. {"dct", NULL, OFFSET(dct_algo), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|E, "dct"},

  576. {"auto", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_AUTO, INT_MIN, INT_MAX, V|E, "dct"},

  577. {"fastint", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_FASTINT, INT_MIN, INT_MAX, V|E, "dct"},

  578. {"int", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_INT, INT_MIN, INT_MAX, V|E, "dct"},

  579. {"mmx", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_MMX, INT_MIN, INT_MAX, V|E, "dct"},

  580. {"mlib", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_MLIB, INT_MIN, INT_MAX, V|E, "dct"},

  581. {"altivec", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_ALTIVEC, INT_MIN, INT_MAX, V|E, "dct"},

  582. {"faan", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_FAAN, INT_MIN, INT_MAX, V|E, "dct"},

  583. {"lumi_mask", "lumimasking", OFFSET(lumi_masking), FF_OPT_TYPE_FLOAT, 0, FLT_MIN, FLT_MAX, V|E},

  584. {"tcplx_mask", "temporal complexity masking", OFFSET(temporal_cplx_masking), FF_OPT_TYPE_FLOAT, 0, FLT_MIN, FLT_MAX, V|E},

  585. {"scplx_mask", "spatial complexity masking", OFFSET(spatial_cplx_masking), FF_OPT_TYPE_FLOAT, 0, FLT_MIN, FLT_MAX, V|E},

  586. {"p_mask", "inter masking", OFFSET(p_masking), FF_OPT_TYPE_FLOAT, 0, FLT_MIN, FLT_MAX, V|E},

  587. {"dark_mask", "darkness masking", OFFSET(dark_masking), FF_OPT_TYPE_FLOAT, 0, FLT_MIN, FLT_MAX, V|E},

  588. {"unused", NULL, OFFSET(unused), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  589. {"idct", NULL, OFFSET(idct_algo), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|E|D, "idct"},

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

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

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

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

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

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

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

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

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

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

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

  601. {"h264", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_H264, INT_MIN, INT_MAX, V|E|D, "idct"},

  602. {"vp3", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_VP3, INT_MIN, INT_MAX, V|E|D, "idct"},

  603. {"ipp", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_IPP, INT_MIN, INT_MAX, V|E|D, "idct"},

  604. {"xvidmmx", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_XVIDMMX, INT_MIN, INT_MAX, V|E|D, "idct"},

  605. {"slice_count", NULL, OFFSET(slice_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  606. {"ec", NULL, OFFSET(error_concealment), FF_OPT_TYPE_FLAGS, 3, INT_MIN, INT_MAX, V|D, "ec"},

  607. {"guess_mvs", NULL, 0, FF_OPT_TYPE_CONST, FF_EC_GUESS_MVS, INT_MIN, INT_MAX, V|D, "ec"},

  608. {"deblock", NULL, 0, FF_OPT_TYPE_CONST, FF_EC_DEBLOCK, INT_MIN, INT_MAX, V|D, "ec"},

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

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

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

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

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

  614. {"aspect", NULL, OFFSET(sample_aspect_ratio), FF_OPT_TYPE_RATIONAL, DEFAULT, 0, 10, V|E},

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

  616. {"pict", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_PICT_INFO, INT_MIN, INT_MAX, V|D, "debug"},

  617. {"rc", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_RC, INT_MIN, INT_MAX, V|E, "debug"},

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

  619. {"mb_type", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},

  620. {"qp", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_QP, INT_MIN, INT_MAX, V|D, "debug"},

  621. {"mv", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_MV, INT_MIN, INT_MAX, V|D, "debug"},

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

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

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

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

  626. {"er", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_ER, INT_MIN, INT_MAX, V|D, "debug"},

  627. {"mmco", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_MMCO, INT_MIN, INT_MAX, V|D, "debug"},

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

  629. {"vis_qp", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_QP, INT_MIN, INT_MAX, V|D, "debug"},

  630. {"vis_mb_type", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},

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

  632. {"pf", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_P_FOR, INT_MIN, INT_MAX, V|D, "debug_mv"},

  633. {"bf", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_B_FOR, INT_MIN, INT_MAX, V|D, "debug_mv"},

  634. {"bb", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_B_BACK, INT_MIN, INT_MAX, V|D, "debug_mv"},

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

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

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

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

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

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

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

  642. {"last_pred", NULL, OFFSET(last_predictor_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  643. {"preme", NULL, OFFSET(pre_me), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

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

  645. {"sad", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_SAD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  646. {"sse", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_SSE, INT_MIN, INT_MAX, V|E, "cmp_func"},

  647. {"satd", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_SATD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  648. {"dct", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_DCT, INT_MIN, INT_MAX, V|E, "cmp_func"},

  649. {"psnr", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_PSNR, INT_MIN, INT_MAX, V|E, "cmp_func"},

  650. {"bit", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_BIT, INT_MIN, INT_MAX, V|E, "cmp_func"},

  651. {"rd", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_RD, INT_MIN, INT_MAX, V|E, "cmp_func"},

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

  653. {"vsad", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_VSAD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  654. {"vsse", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_VSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},

  655. {"nsse", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_NSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},

  656. #ifdef CONFIG_SNOW_ENCODER

  657. {"w53", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_W53, INT_MIN, INT_MAX, V|E, "cmp_func"},

  658. {"w97", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_W97, INT_MIN, INT_MAX, V|E, "cmp_func"},

  659. #endif

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

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

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

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

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

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

  666. {"ibias", NULL, OFFSET(intra_quant_bias), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  667. {"pbias", NULL, OFFSET(inter_quant_bias), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

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

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

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

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

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

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

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

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

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

  677. {"mbd", NULL, OFFSET(mb_decision), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "mbd"},

  678. {"simple", NULL, 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_SIMPLE, INT_MIN, INT_MAX, V|E, "mbd"},

  679. {"bits", NULL, 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_BITS, INT_MIN, INT_MAX, V|E, "mbd"},

  680. {"rd", NULL, 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_RD, INT_MIN, INT_MAX, V|E, "mbd"},

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

  682. {"sc_threshold", NULL, OFFSET(scenechange_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

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

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

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

  686. {"rc_init_occupancy", NULL, OFFSET(rc_initial_buffer_occupancy), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

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

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

  689. {"error_rate", NULL, OFFSET(error_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  690. {"antialias", NULL, OFFSET(antialias_algo), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D, "aa"},

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

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

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

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

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

  696. {"thread_count", NULL, OFFSET(thread_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E|D},

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

  698. {"mb_threshold", NULL, OFFSET(mb_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

  699. {"dc", NULL, OFFSET(intra_dc_precision), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

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

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

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

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

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

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

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

  707. {"lowres", NULL, OFFSET(lowres), FF_OPT_TYPE_INT, 0, 0, INT_MAX, V|D},

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

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

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

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

  712. {"border_mask", NULL, OFFSET(border_masking), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

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

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

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

  716. {"bidir_refine", NULL, OFFSET(bidir_refine), FF_OPT_TYPE_INT, DEFAULT, 0, 4, V|E},

  717. {"brd_scale", NULL, OFFSET(brd_scale), FF_OPT_TYPE_INT, DEFAULT, 0, 10, V|E},

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

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

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

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

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

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

  724. {"trellis", NULL, OFFSET(trellis), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|A|E},

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

  726. {"bpyramid", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_BPYRAMID, INT_MIN, INT_MAX, V|E, "flags2"},

  727. {"wpred", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_WPRED, INT_MIN, INT_MAX, V|E, "flags2"},

  728. {"mixed_refs", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_MIXED_REFS, INT_MIN, INT_MAX, V|E, "flags2"},

  729. {"8x8dct", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_8X8DCT, INT_MIN, INT_MAX, V|E, "flags2"},

  730. {"fastpskip", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_FASTPSKIP, INT_MIN, INT_MAX, V|E, "flags2"},

  731. {"aud", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_AUD, INT_MIN, INT_MAX, V|E, "flags2"},

  732. {"brdo", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_BRDO, INT_MIN, INT_MAX, V|E, "flags2"},

  733. {"complexityblur", NULL, OFFSET(complexityblur), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

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

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

  736. {"partitions", NULL, OFFSET(partitions), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, V|E, "partitions"},

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

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

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

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

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

  742. {"sc_factor", NULL, OFFSET(scenechange_factor), FF_OPT_TYPE_INT, 6, 0, INT_MAX, V|E},

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

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

  745. {"b_sensitivity", NULL, OFFSET(b_sensitivity), FF_OPT_TYPE_INT, 40, 1, INT_MAX, V|E},

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

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

  748. {"lpc_coeff_precision", NULL, OFFSET(lpc_coeff_precision), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|E},

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

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

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

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

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

  754. {NULL},

  755. };

  756. 

  757. #undef A

  758. #undef V

  759. 

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

  761. 

  762. void avcodec_get_context_defaults(AVCodecContext *s){

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

  764. 

  765.     s->av_class= &av_codec_context_class;

  766.     s->bit_rate= 800*1000;

  767.     s->bit_rate_tolerance= s->bit_rate*10;

  768.     s->qmin= 2;

  769.     s->qmax= 31;

  770.     s->mb_lmin= FF_QP2LAMBDA * 2;

  771.     s->mb_lmax= FF_QP2LAMBDA * 31;

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

  773.     s->cqp = -1;

  774.     s->refs = 1;

  775.     s->directpred = 2;

  776.     s->qcompress= 0.5;

  777.     s->complexityblur = 20.0;

  778.     s->keyint_min = 25;

  779.     s->flags2 = CODEC_FLAG2_FASTPSKIP;

  780.     s->max_qdiff= 3;

  781.     s->b_quant_factor=1.25;

  782.     s->b_quant_offset=1.25;

  783.     s->i_quant_factor=-0.8;

  784.     s->i_quant_offset=0.0;

  785.     s->error_concealment= 3;

  786.     s->error_resilience= 1;

  787.     s->workaround_bugs= FF_BUG_AUTODETECT;

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

  789.     s->gop_size= 50;

  790.     s->me_method= ME_EPZS;

  791.     s->get_buffer= avcodec_default_get_buffer;

  792.     s->release_buffer= avcodec_default_release_buffer;

  793.     s->get_format= avcodec_default_get_format;

  794.     s->execute= avcodec_default_execute;

  795.     s->thread_count=1;

  796.     s->me_subpel_quality=8;

  797.     s->lmin= FF_QP2LAMBDA * s->qmin;

  798.     s->lmax= FF_QP2LAMBDA * s->qmax;

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

  800.     s->ildct_cmp= FF_CMP_VSAD;

  801.     s->profile= FF_PROFILE_UNKNOWN;

  802.     s->level= FF_LEVEL_UNKNOWN;

  803.     s->me_penalty_compensation= 256;

  804.     s->pix_fmt= PIX_FMT_NONE;

  805.     s->frame_skip_cmp= FF_CMP_DCTMAX;

  806.     s->nsse_weight= 8;

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

  808.     s->mv0_threshold= 256;

  809.     s->b_sensitivity= 40;

  810.     s->compression_level = FF_COMPRESSION_DEFAULT;

  811.     s->use_lpc = -1;

  812.     s->min_prediction_order = -1;

  813.     s->max_prediction_order = -1;

  814.     s->prediction_order_method = -1;

  815.     s->min_partition_order = -1;

  816.     s->max_partition_order = -1;

  817. 

  818.     s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;

  819.     s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;

  820.     s->palctrl = NULL;

  821.     s->reget_buffer= avcodec_default_reget_buffer;

  822. }

  823. 

  824. /**

  825.  * allocates a AVCodecContext and set it to defaults.

  826.  * this can be deallocated by simply calling free()

  827.  */

  828. AVCodecContext *avcodec_alloc_context(void){

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

  830. 

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

  832. 

  833.     avcodec_get_context_defaults(avctx);

  834. 

  835.     return avctx;

  836. }

  837. 

  838. void avcodec_get_frame_defaults(AVFrame *pic){

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

  840. 

  841.     pic->pts= AV_NOPTS_VALUE;

  842.     pic->key_frame= 1;

  843. }

  844. 

  845. /**

  846.  * allocates a AVPFrame and set it to defaults.

  847.  * this can be deallocated by simply calling free()

  848.  */

  849. AVFrame *avcodec_alloc_frame(void){

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

  851. 

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

  853. 

  854.     avcodec_get_frame_defaults(pic);

  855. 

  856.     return pic;

  857. }

  858. 

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

  860. {

  861.     int ret= -1;

  862. 

  863.     entangled_thread_counter++;

  864.     if(entangled_thread_counter != 1){

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

  866.         goto end;

  867.     }

  868. 

  869.     if(avctx->codec)

  870.         goto end;

  871. 

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

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

  874.         if (!avctx->priv_data)

  875.             goto end;

  876.     } else {

  877.         avctx->priv_data = NULL;

  878.     }

  879. 

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

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

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

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

  884. 

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

  886.         av_freep(&avctx->priv_data);

  887.         goto end;

  888.     }

  889. 

  890.     avctx->codec = codec;

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

  892.     avctx->frame_number = 0;

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

  894.     if (ret < 0) {

  895.         av_freep(&avctx->priv_data);

  896.         avctx->codec= NULL;

  897.         goto end;

  898.     }

  899.     ret=0;

  900. end:

  901.     entangled_thread_counter--;

  902.     return ret;

  903. }

  904. 

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

  906.                          const short *samples)

  907. {

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

  909.         av_log(avctx, AV_LOG_ERROR, "buffer smaller then minimum size\n");

  910.         return -1;

  911.     }

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

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

  914.         avctx->frame_number++;

  915.         return ret;

  916.     }else

  917.         return 0;

  918. }

  919. 

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

  921.                          const AVFrame *pict)

  922. {

  923.     if(buf_size < FF_MIN_BUFFER_SIZE){

  924.         av_log(avctx, AV_LOG_ERROR, "buffer smaller then minimum size\n");

  925.         return -1;

  926.     }

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

  928.         return -1;

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

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

  931.         avctx->frame_number++;

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

  933. 

  934.         return ret;

  935.     }else

  936.         return 0;

  937. }

  938. 

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

  940.                             const AVSubtitle *sub)

  941. {

  942.     int ret;

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

  944.     avctx->frame_number++;

  945.     return ret;

  946. }

  947. 

  948. /**

  949.  * decode a frame.

  950.  * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes

  951.  * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end

  952.  * @param buf_size the size of the buffer in bytes

  953.  * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero

  954.  * @return -1 if error, otherwise return the number of

  955.  * bytes used.

  956.  */

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

  958.                          int *got_picture_ptr,

  959.                          uint8_t *buf, int buf_size)

  960. {

  961.     int ret;

  962. 

  963.     *got_picture_ptr= 0;

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

  965.         return -1;

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

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

  968.                                 buf, buf_size);

  969. 

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

  971. 

  972.         if (*got_picture_ptr)

  973.             avctx->frame_number++;

  974.     }else

  975.         ret= 0;

  976. 

  977.     return ret;

  978. }

  979. 

  980. /* decode an audio frame. return -1 if error, otherwise return the

  981.    *number of bytes used. If no frame could be decompressed,

  982.    *frame_size_ptr is zero. Otherwise, it is the decompressed frame

  983.    *size in BYTES. */

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

  985.                          int *frame_size_ptr,

  986.                          uint8_t *buf, int buf_size)

  987. {

  988.     int ret;

  989. 

  990.     *frame_size_ptr= 0;

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

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

  993.                                 buf, buf_size);

  994.         avctx->frame_number++;

  995.     }else

  996.         ret= 0;

  997.     return ret;

  998. }

  999. 

  1000. /* decode a subtitle message. return -1 if error, otherwise return the

  1001.    *number of bytes used. If no subtitle could be decompressed,

  1002.    *got_sub_ptr is zero. Otherwise, the subtitle is stored in *sub. */

  1003. int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,

  1004.                             int *got_sub_ptr,

  1005.                             const uint8_t *buf, int buf_size)

  1006. {

  1007.     int ret;

  1008. 

  1009.     *got_sub_ptr = 0;

  1010.     ret = avctx->codec->decode(avctx, sub, got_sub_ptr,

  1011.                                (uint8_t *)buf, buf_size);

  1012.     if (*got_sub_ptr)

  1013.         avctx->frame_number++;

  1014.     return ret;

  1015. }

  1016. 

  1017. int avcodec_close(AVCodecContext *avctx)

  1018. {

  1019.     entangled_thread_counter++;

  1020.     if(entangled_thread_counter != 1){

  1021.         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");

  1022.         entangled_thread_counter--;

  1023.         return -1;

  1024.     }

  1025. 

  1026.     if (avctx->codec->close)

  1027.         avctx->codec->close(avctx);

  1028.     avcodec_default_free_buffers(avctx);

  1029.     av_freep(&avctx->priv_data);

  1030.     avctx->codec = NULL;

  1031.     entangled_thread_counter--;

  1032.     return 0;

  1033. }

  1034. 

  1035. AVCodec *avcodec_find_encoder(enum CodecID id)

  1036. {

  1037.     AVCodec *p;

  1038.     p = first_avcodec;

  1039.     while (p) {

  1040.         if (p->encode != NULL && p->id == id)

  1041.             return p;

  1042.         p = p->next;

  1043.     }

  1044.     return NULL;

  1045. }

  1046. 

  1047. AVCodec *avcodec_find_encoder_by_name(const char *name)

  1048. {

  1049.     AVCodec *p;

  1050.     p = first_avcodec;

  1051.     while (p) {

  1052.         if (p->encode != NULL && strcmp(name,p->name) == 0)

  1053.             return p;

  1054.         p = p->next;

  1055.     }

  1056.     return NULL;

  1057. }

  1058. 

  1059. AVCodec *avcodec_find_decoder(enum CodecID id)

  1060. {

  1061.     AVCodec *p;

  1062.     p = first_avcodec;

  1063.     while (p) {

  1064.         if (p->decode != NULL && p->id == id)

  1065.             return p;

  1066.         p = p->next;

  1067.     }

  1068.     return NULL;

  1069. }

  1070. 

  1071. AVCodec *avcodec_find_decoder_by_name(const char *name)

  1072. {

  1073.     AVCodec *p;

  1074.     p = first_avcodec;

  1075.     while (p) {

  1076.         if (p->decode != NULL && strcmp(name,p->name) == 0)

  1077.             return p;

  1078.         p = p->next;

  1079.     }

  1080.     return NULL;

  1081. }

  1082. 

  1083. void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)

  1084. {

  1085.     const char *codec_name;

  1086.     AVCodec *p;

  1087.     char buf1[32];

  1088.     char channels_str[100];

  1089.     int bitrate;

  1090. 

  1091.     if (encode)

  1092.         p = avcodec_find_encoder(enc->codec_id);

  1093.     else

  1094.         p = avcodec_find_decoder(enc->codec_id);

  1095. 

  1096.     if (p) {

  1097.         codec_name = p->name;

  1098.         if (!encode && enc->codec_id == CODEC_ID_MP3) {

  1099.             if (enc->sub_id == 2)

  1100.                 codec_name = "mp2";

  1101.             else if (enc->sub_id == 1)

  1102.                 codec_name = "mp1";

  1103.         }

  1104.     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {

  1105.         /* fake mpeg2 transport stream codec (currently not

  1106.            registered) */

  1107.         codec_name = "mpeg2ts";

  1108.     } else if (enc->codec_name[0] != '\0') {

  1109.         codec_name = enc->codec_name;

  1110.     } else {

  1111.         /* output avi tags */

  1112.         if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)

  1113.            && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){

  1114.             snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",

  1115.                      enc->codec_tag & 0xff,

  1116.                      (enc->codec_tag >> 8) & 0xff,

  1117.                      (enc->codec_tag >> 16) & 0xff,

  1118.                      (enc->codec_tag >> 24) & 0xff,

  1119.                       enc->codec_tag);

  1120.         } else {

  1121.             snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);

  1122.         }

  1123.         codec_name = buf1;

  1124.     }

  1125. 

  1126.     switch(enc->codec_type) {

  1127.     case CODEC_TYPE_VIDEO:

  1128.         snprintf(buf, buf_size,

  1129.                  "Video: %s%s",

  1130.                  codec_name, enc->mb_decision ? " (hq)" : "");

  1131.         if (enc->pix_fmt != PIX_FMT_NONE) {

  1132.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1133.                      ", %s",

  1134.                      avcodec_get_pix_fmt_name(enc->pix_fmt));

  1135.         }

  1136.         if (enc->width) {

  1137.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1138.                      ", %dx%d",

  1139.                      enc->width, enc->height);

  1140.             if(av_log_get_level() >= AV_LOG_DEBUG){

  1141.                 int g= ff_gcd(enc->time_base.num, enc->time_base.den);

  1142.                 snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1143.                      ", %d/%d",

  1144.                      enc->time_base.num/g, enc->time_base.den/g);

  1145.             }

  1146.         }

  1147.         if (encode) {

  1148.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1149.                      ", q=%d-%d", enc->qmin, enc->qmax);

  1150.         }

  1151.         bitrate = enc->bit_rate;

  1152.         break;

  1153.     case CODEC_TYPE_AUDIO:

  1154.         snprintf(buf, buf_size,

  1155.                  "Audio: %s",

  1156.                  codec_name);

  1157.         switch (enc->channels) {

  1158.             case 1:

  1159.                 strcpy(channels_str, "mono");

  1160.                 break;

  1161.             case 2:

  1162.                 strcpy(channels_str, "stereo");

  1163.                 break;

  1164.             case 6:

  1165.                 strcpy(channels_str, "5:1");

  1166.                 break;

  1167.             default:

  1168.                 snprintf(channels_str, sizeof(channels_str), "%d channels", enc->channels);

  1169.                 break;

  1170.         }

  1171.         if (enc->sample_rate) {

  1172.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1173.                      ", %d Hz, %s",

  1174.                      enc->sample_rate,

  1175.                      channels_str);

  1176.         }

  1177. 

  1178.         /* for PCM codecs, compute bitrate directly */

  1179.         switch(enc->codec_id) {

  1180.         case CODEC_ID_PCM_S32LE:

  1181.         case CODEC_ID_PCM_S32BE:

  1182.         case CODEC_ID_PCM_U32LE:

  1183.         case CODEC_ID_PCM_U32BE:

  1184.             bitrate = enc->sample_rate * enc->channels * 32;

  1185.             break;

  1186.         case CODEC_ID_PCM_S24LE:

  1187.         case CODEC_ID_PCM_S24BE:

  1188.         case CODEC_ID_PCM_U24LE:

  1189.         case CODEC_ID_PCM_U24BE:

  1190.         case CODEC_ID_PCM_S24DAUD:

  1191.             bitrate = enc->sample_rate * enc->channels * 24;

  1192.             break;

  1193.         case CODEC_ID_PCM_S16LE:

  1194.         case CODEC_ID_PCM_S16BE:

  1195.         case CODEC_ID_PCM_U16LE:

  1196.         case CODEC_ID_PCM_U16BE:

  1197.             bitrate = enc->sample_rate * enc->channels * 16;

  1198.             break;

  1199.         case CODEC_ID_PCM_S8:

  1200.         case CODEC_ID_PCM_U8:

  1201.         case CODEC_ID_PCM_ALAW:

  1202.         case CODEC_ID_PCM_MULAW:

  1203.             bitrate = enc->sample_rate * enc->channels * 8;

  1204.             break;

  1205.         default:

  1206.             bitrate = enc->bit_rate;

  1207.             break;

  1208.         }

  1209.         break;

  1210.     case CODEC_TYPE_DATA:

  1211.         snprintf(buf, buf_size, "Data: %s", codec_name);

  1212.         bitrate = enc->bit_rate;

  1213.         break;

  1214.     case CODEC_TYPE_SUBTITLE:

  1215.         snprintf(buf, buf_size, "Subtitle: %s", codec_name);

  1216.         bitrate = enc->bit_rate;

  1217.         break;

  1218.     default:

  1219.         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);

  1220.         return;

  1221.     }

  1222.     if (encode) {

  1223.         if (enc->flags & CODEC_FLAG_PASS1)

  1224.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1225.                      ", pass 1");

  1226.         if (enc->flags & CODEC_FLAG_PASS2)

  1227.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1228.                      ", pass 2");

  1229.     }

  1230.     if (bitrate != 0) {

  1231.         snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1232.                  ", %d kb/s", bitrate / 1000);

  1233.     }

  1234. }

  1235. 

  1236. unsigned avcodec_version( void )

  1237. {

  1238.   return LIBAVCODEC_VERSION_INT;

  1239. }

  1240. 

  1241. unsigned avcodec_build( void )

  1242. {

  1243.   return LIBAVCODEC_BUILD;

  1244. }

  1245. 

  1246. static void init_crcs(void){

  1247.     av_crc04C11DB7= av_mallocz_static(sizeof(AVCRC) * 257);

  1248.     av_crc8005    = av_mallocz_static(sizeof(AVCRC) * 257);

  1249.     av_crc07      = av_mallocz_static(sizeof(AVCRC) * 257);

  1250.     av_crc_init(av_crc04C11DB7, 0, 32, 0x04c11db7, sizeof(AVCRC)*257);

  1251.     av_crc_init(av_crc8005    , 0, 16, 0x8005    , sizeof(AVCRC)*257);

  1252.     av_crc_init(av_crc07      , 0,  8, 0x07      , sizeof(AVCRC)*257);

  1253. }

  1254. 

  1255. /* must be called before any other functions */

  1256. void avcodec_init(void)

  1257. {

  1258.     static int inited = 0;

  1259. 

  1260.     if (inited != 0)

  1261.         return;

  1262.     inited = 1;

  1263. 

  1264.     dsputil_static_init();

  1265.     init_crcs();

  1266. }

  1267. 

  1268. /**

  1269.  * Flush buffers, should be called when seeking or when swicthing to a different stream.

  1270.  */

  1271. void avcodec_flush_buffers(AVCodecContext *avctx)

  1272. {

  1273.     if(avctx->codec->flush)

  1274.         avctx->codec->flush(avctx);

  1275. }

  1276. 

  1277. void avcodec_default_free_buffers(AVCodecContext *s){

  1278.     int i, j;

  1279. 

  1280.     if(s->internal_buffer==NULL) return;

  1281. 

  1282.     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){

  1283.         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];

  1284.         for(j=0; j<4; j++){

  1285.             av_freep(&buf->base[j]);

  1286.             buf->data[j]= NULL;

  1287.         }

  1288.     }

  1289.     av_freep(&s->internal_buffer);

  1290. 

  1291.     s->internal_buffer_count=0;

  1292. }

  1293. 

  1294. char av_get_pict_type_char(int pict_type){

  1295.     switch(pict_type){

  1296.     case I_TYPE: return 'I';

  1297.     case P_TYPE: return 'P';

  1298.     case B_TYPE: return 'B';

  1299.     case S_TYPE: return 'S';

  1300.     case SI_TYPE:return 'i';

  1301.     case SP_TYPE:return 'p';

  1302.     default:     return '?';

  1303.     }

  1304. }

  1305. 

  1306. int av_get_bits_per_sample(enum CodecID codec_id){

  1307.     switch(codec_id){

  1308.     case CODEC_ID_ADPCM_SBPRO_2:

  1309.         return 2;

  1310.     case CODEC_ID_ADPCM_SBPRO_3:

  1311.         return 3;

  1312.     case CODEC_ID_ADPCM_SBPRO_4:

  1313.     case CODEC_ID_ADPCM_CT:

  1314.         return 4;

  1315.     case CODEC_ID_PCM_ALAW:

  1316.     case CODEC_ID_PCM_MULAW:

  1317.     case CODEC_ID_PCM_S8:

  1318.     case CODEC_ID_PCM_U8:

  1319.         return 8;

  1320.     case CODEC_ID_PCM_S16BE:

  1321.     case CODEC_ID_PCM_S16LE:

  1322.     case CODEC_ID_PCM_U16BE:

  1323.     case CODEC_ID_PCM_U16LE:

  1324.         return 16;

  1325.     case CODEC_ID_PCM_S24DAUD:

  1326.     case CODEC_ID_PCM_S24BE:

  1327.     case CODEC_ID_PCM_S24LE:

  1328.     case CODEC_ID_PCM_U24BE:

  1329.     case CODEC_ID_PCM_U24LE:

  1330.         return 24;

  1331.     case CODEC_ID_PCM_S32BE:

  1332.     case CODEC_ID_PCM_S32LE:

  1333.     case CODEC_ID_PCM_U32BE:

  1334.     case CODEC_ID_PCM_U32LE:

  1335.         return 32;

  1336.     default:

  1337.         return 0;

  1338.     }

  1339. }

  1340. 

  1341. #if !defined(HAVE_THREADS)

  1342. int avcodec_thread_init(AVCodecContext *s, int thread_count){

  1343.     return -1;

  1344. }

  1345. #endif

  1346. 

  1347. unsigned int av_xiphlacing(unsigned char *s, unsigned int v)

  1348. {

  1349.     unsigned int n = 0;

  1350. 

  1351.     while(v >= 0xff) {

  1352.         *s++ = 0xff;

  1353.         v -= 0xff;

  1354.         n++;

  1355.     }

  1356.     *s = v;

  1357.     n++;

  1358.     return n;

  1359. }

  1360. 

  1361. /* Wrapper to work around the lack of mkstemp() on mingw/cygin.

  1362.  * Also, tries to create file in /tmp first, if possible.

  1363.  * *prefix can be a character constant; *filename will be allocated internally.

  1364.  * Returns file descriptor of opened file (or -1 on error)

  1365.  * and opened file name in **filename. */

  1366. int av_tempfile(char *prefix, char **filename) {

  1367.     int fd=-1;

  1368. #ifdef __MINGW32__

  1369.     *filename = tempnam(".", prefix);

  1370. #else

  1371.     size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */

  1372.     *filename = av_malloc(len);

  1373. #endif

  1374.     /* -----common section-----*/

  1375.     if (*filename == NULL) {

  1376.         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");

  1377.         return -1;

  1378.     }

  1379. #ifdef __MINGW32__

  1380.     fd = open(*filename, _O_RDWR | _O_BINARY | _O_CREAT, 0444);

  1381. #else

  1382.     snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);

  1383.     fd = mkstemp(*filename);

  1384.     if (fd < 0) {

  1385.         snprintf(*filename, len, "./%sXXXXXX", prefix);

  1386.         fd = mkstemp(*filename);

  1387.     }

  1388. #endif

  1389.     /* -----common section-----*/

  1390.     if (fd < 0) {

  1391.         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);

  1392.         return -1;

  1393.     }

  1394.     return fd; /* success */

  1395. }