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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 file is part of FFmpeg.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file utils.c

  25.  * utils.

  26.  */

  27. 

  28. #include "avcodec.h"

  29. #include "dsputil.h"

  30. #include "mpegvideo.h"

  31. #include "integer.h"

  32. #include "opt.h"

  33. #include "crc.h"

  34. #include <stdarg.h>

  35. #include <limits.h>

  36. #include <float.h>

  37. #ifdef __MINGW32__

  38. #include <fcntl.h>

  39. #endif

  40. 

  41. const uint8_t ff_reverse[256]={

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  58. };

  59. 

  60. static int volatile entangled_thread_counter=0;

  61. 

  62. /**

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

  64.  */

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

  66. {

  67.     if(min_size < *size)

  68.         return ptr;

  69. 

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

  71. 

  72.     return av_realloc(ptr, *size);

  73. }

  74. 

  75. static unsigned int last_static = 0;

  76. static unsigned int allocated_static = 0;

  77. static void** array_static = NULL;

  78. 

  79. /**

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

  81.  */

  82. void *av_mallocz_static(unsigned int size)

  83. {

  84.     void *ptr = av_mallocz(size);

  85. 

  86.     if(ptr){

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

  88.         if(!array_static)

  89.             return NULL;

  90.         array_static[last_static++] = ptr;

  91.     }

  92. 

  93.     return ptr;

  94. }

  95. 

  96. /**

  97.  * same as above, but does realloc

  98.  */

  99. 

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

  101. {

  102.     int i;

  103.     if(!ptr)

  104.       return av_mallocz_static(size);

  105.     /* Look for the old ptr */

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

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

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

  109.             return array_static[i];

  110.         }

  111.     }

  112.     return NULL;

  113. 

  114. }

  115. 

  116. /**

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

  118.  */

  119. void av_free_static(void)

  120. {

  121.     while(last_static){

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

  123.     }

  124.     av_freep(&array_static);

  125. }

  126. 

  127. /**

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

  129.  */

  130. 

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

  132. 

  133. static void do_free(void)

  134. {

  135.     av_free_static();

  136. }

  137. 

  138. 

  139. /* encoder management */

  140. AVCodec *first_avcodec = NULL;

  141. 

  142. void register_avcodec(AVCodec *format)

  143. {

  144.     AVCodec **p;

  145.     p = &first_avcodec;

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

  147.     *p = format;

  148.     format->next = NULL;

  149. }

  150. 

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

  152.     s->coded_width = width;

  153.     s->coded_height= height;

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

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

  156. }

  157. 

  158. typedef struct InternalBuffer{

  159.     int last_pic_num;

  160.     uint8_t *base[4];

  161.     uint8_t *data[4];

  162.     int linesize[4];

  163. }InternalBuffer;

  164. 

  165. #define INTERNAL_BUFFER_SIZE 32

  166. 

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

  168. 

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

  170.     int w_align= 1;

  171.     int h_align= 1;

  172. 

  173.     switch(s->pix_fmt){

  174.     case PIX_FMT_YUV420P:

  175.     case PIX_FMT_YUYV422:

  176.     case PIX_FMT_UYVY422:

  177.     case PIX_FMT_YUV422P:

  178.     case PIX_FMT_YUV444P:

  179.     case PIX_FMT_GRAY8:

  180.     case PIX_FMT_GRAY16BE:

  181.     case PIX_FMT_GRAY16LE:

  182.     case PIX_FMT_YUVJ420P:

  183.     case PIX_FMT_YUVJ422P:

  184.     case PIX_FMT_YUVJ444P:

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

  186.         h_align= 16;

  187.         break;

  188.     case PIX_FMT_YUV411P:

  189.     case PIX_FMT_UYYVYY411:

  190.         w_align=32;

  191.         h_align=8;

  192.         break;

  193.     case PIX_FMT_YUV410P:

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

  195.             w_align=64;

  196.             h_align=64;

  197.         }

  198.     case PIX_FMT_RGB555:

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

  200.             w_align=4;

  201.             h_align=4;

  202.         }

  203.     case PIX_FMT_PAL8:

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

  205.             w_align=4;

  206.             h_align=4;

  207.         }

  208.         break;

  209.     case PIX_FMT_BGR24:

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

  211.             w_align=4;

  212.             h_align=4;

  213.         }

  214.         break;

  215.     default:

  216.         w_align= 1;

  217.         h_align= 1;

  218.         break;

  219.     }

  220. 

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

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

  223. }

  224. 

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

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

  227.         return 0;

  228. 

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

  230.     return -1;

  231. }

  232. 

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

  234.     int i;

  235.     int w= s->width;

  236.     int h= s->height;

  237.     InternalBuffer *buf;

  238.     int *picture_number;

  239. 

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

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

  242.         return -1;

  243.     }

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

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

  246.         return -1;

  247.     }

  248. 

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

  250.         return -1;

  251. 

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

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

  254.     }

  255. #if 0

  256.     s->internal_buffer= av_fast_realloc(

  257.         s->internal_buffer,

  258.         &s->internal_buffer_size,

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

  260.         );

  261. #endif

  262. 

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

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

  265.     (*picture_number)++;

  266. 

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

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

  269.         buf->last_pic_num= *picture_number;

  270.     }else{

  271.         int h_chroma_shift, v_chroma_shift;

  272.         int pixel_size, size[3];

  273.         AVPicture picture;

  274. 

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

  276. 

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

  278. 

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

  280.             w+= EDGE_WIDTH*2;

  281.             h+= EDGE_WIDTH*2;

  282.         }

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

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

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

  286.         assert(pixel_size>=1);

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

  288.         if(pixel_size == 3*8)

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

  290.         else

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

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

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

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

  295.         if(picture.data[2])

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

  297.         else

  298.             size[2]= 0;

  299. 

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

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

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

  303. 

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

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

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

  307. 

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

  309. 

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

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

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

  313. 

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

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

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

  317.             else

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

  319.         }

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

  321.     }

  322.     pic->type= FF_BUFFER_TYPE_INTERNAL;

  323. 

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

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

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

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

  328.     }

  329.     s->internal_buffer_count++;

  330. 

  331.     return 0;

  332. }

  333. 

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

  335.     int i;

  336.     InternalBuffer *buf, *last;

  337. 

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

  339.     assert(s->internal_buffer_count);

  340. 

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

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

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

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

  345.             break;

  346.     }

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

  348.     s->internal_buffer_count--;

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

  350. 

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

  352. 

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

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

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

  356.     }

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

  358. }

  359. 

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

  361.     AVFrame temp_pic;

  362.     int i;

  363. 

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

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

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

  367.         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;

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

  369.     }

  370. 

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

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

  373.         return 0;

  374. 

  375.     /*

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

  377.      */

  378.     temp_pic = *pic;

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

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

  381.     pic->opaque = NULL;

  382.     /* Allocate new frame */

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

  384.         return -1;

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

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

  387.              s->height);

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

  389.     return 0;

  390. }

  391. 

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

  393.     int i;

  394. 

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

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

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

  398.     }

  399.     return 0;

  400. }

  401. 

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

  403.     return fmt[0];

  404. }

  405. 

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

  407.     AVCodecContext *avc= ptr;

  408. 

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

  410.         return avc->codec->name;

  411.     else

  412.         return "NULL";

  413. }

  414. 

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

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

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

  418. #define V AV_OPT_FLAG_VIDEO_PARAM

  419. #define A AV_OPT_FLAG_AUDIO_PARAM

  420. #define S AV_OPT_FLAG_SUBTITLE_PARAM

  421. #define E AV_OPT_FLAG_ENCODING_PARAM

  422. #define D AV_OPT_FLAG_DECODING_PARAM

  423. 

  424. #define AV_CODEC_DEFAULT_BITRATE 200*1000

  425. 

  426. static const AVOption options[]={

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

  428. {"bt", "set video bitrate tolerance (in bits/s)", OFFSET(bit_rate_tolerance), FF_OPT_TYPE_INT, AV_CODEC_DEFAULT_BITRATE*20, 1, INT_MAX, V|E},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  451. {"global_header", "place global headers in extradata instead of every keyframe", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GLOBAL_HEADER, INT_MIN, INT_MAX, 0, "flags"},

  452. {"bitexact", "use only bitexact stuff (except (i)dct)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_BITEXACT, INT_MIN, INT_MAX, A|V|S|D|E, "flags"},

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

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

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

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

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

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

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

  460. {"scan_offset", "will reserve space for svcd scan offset user data", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_SVCD_SCAN_OFFSET, INT_MIN, INT_MAX, V|E, "flags"},

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

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

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

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

  465. {"local_header", "place global headers at every keyframe instead of in extradata", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_LOCAL_HEADER, INT_MIN, INT_MAX, V|E, "flags2"},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  485. {"b_qfactor", "qp factor between p and b frames", OFFSET(b_quant_factor), FF_OPT_TYPE_FLOAT, 1.25, FLT_MIN, FLT_MAX, V|E},

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

  487. {"b_strategy", "strategy to choose between I/P/B-frames", OFFSET(b_frame_strategy), FF_OPT_TYPE_INT, 0, INT_MIN, INT_MAX, V|E},

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

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

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

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

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

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

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

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

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

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

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

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

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

  501. {"bug", "workaround not auto detected encoder bugs", OFFSET(workaround_bugs), FF_OPT_TYPE_FLAGS, FF_BUG_AUTODETECT, INT_MIN, INT_MAX, V|D, "bug"},

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

  503. {"old_msmpeg4", "some old lavc generated msmpeg4v3 files (no autodetection)", 0, FF_OPT_TYPE_CONST, FF_BUG_OLD_MSMPEG4, INT_MIN, INT_MAX, V|D, "bug"},

  504. {"xvid_ilace", "Xvid interlacing bug (autodetected if fourcc==XVIX)", 0, FF_OPT_TYPE_CONST, FF_BUG_XVID_ILACE, INT_MIN, INT_MAX, V|D, "bug"},

  505. {"ump4", "(autodetected if fourcc==UMP4)", 0, FF_OPT_TYPE_CONST, FF_BUG_UMP4, INT_MIN, INT_MAX, V|D, "bug"},

  506. {"no_padding", "padding bug (autodetected)", 0, FF_OPT_TYPE_CONST, FF_BUG_NO_PADDING, INT_MIN, INT_MAX, V|D, "bug"},

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

  508. {"ac_vlc", "illegal vlc bug (autodetected per fourcc)", 0, FF_OPT_TYPE_CONST, FF_BUG_AC_VLC, INT_MIN, INT_MAX, V|D, "bug"},

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

  510. {"std_qpel", "old standard qpel (autodetected per fourcc/version)", 0, FF_OPT_TYPE_CONST, FF_BUG_STD_QPEL, INT_MIN, INT_MAX, V|D, "bug"},

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

  512. {"direct_blocksize", "direct-qpel-blocksize bug (autodetected per fourcc/version)", 0, FF_OPT_TYPE_CONST, FF_BUG_DIRECT_BLOCKSIZE, INT_MIN, INT_MAX, V|D, "bug"},

  513. {"edge", "edge padding bug (autodetected per fourcc/version)", 0, FF_OPT_TYPE_CONST, FF_BUG_EDGE, INT_MIN, INT_MAX, V|D, "bug"},

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

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

  516. {"ms", "workaround various bugs in microsofts broken decoders", 0, FF_OPT_TYPE_CONST, FF_BUG_MS, INT_MIN, INT_MAX, V|D, "bug"},

  517. {"lelim", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)", OFFSET(luma_elim_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  518. {"celim", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)", OFFSET(chroma_elim_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  519. {"strict", "how strictly to follow the standards", OFFSET(strict_std_compliance), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, A|V|D, "strict"},

  520. {"very", "strictly conform to a older more strict version of the spec or reference software", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_VERY_STRICT, INT_MIN, INT_MAX, V|E, "strict"},

  521. {"strict", "strictly conform to all the things in the spec no matter what consequences", 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_STRICT, INT_MIN, INT_MAX, V|E, "strict"},

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

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

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

  525. {"b_qoffset", "qp offset between p and b frames", OFFSET(b_quant_offset), FF_OPT_TYPE_FLOAT, 1.25, FLT_MIN, FLT_MAX, V|E},

  526. {"er", "set error resilience strategy", OFFSET(error_resilience), FF_OPT_TYPE_INT, FF_ER_CAREFUL, INT_MIN, INT_MAX, A|V|D, "er"},

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

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

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

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

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

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

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

  534. {"mpeg_quant", "use MPEG quantizers instead of H.263", OFFSET(mpeg_quant), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

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

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

  537. {"qsquish", "how to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable function)", OFFSET(rc_qsquish), FF_OPT_TYPE_FLOAT, DEFAULT, 0, 99, V|E},

  538. {"rc_qmod_amp", "experimental quantizer modulation", OFFSET(rc_qmod_amp), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},

  539. {"rc_qmod_freq", "experimental quantizer modulation", OFFSET(rc_qmod_freq), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

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

  541. {"rc_eq", "set rate control equation", OFFSET(rc_eq), FF_OPT_TYPE_STRING, DEFAULT, CHAR_MIN, CHAR_MAX, V|E},

  542. {"maxrate", "set max video bitrate tolerance (in bits/s)", OFFSET(rc_max_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  543. {"minrate", "set min video bitrate tolerance (in bits/s)", OFFSET(rc_min_rate), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  544. {"bufsize", "set ratecontrol buffer size (in bits)", OFFSET(rc_buffer_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

  545. {"rc_buf_aggressivity", "currently useless", OFFSET(rc_buffer_aggressivity), FF_OPT_TYPE_FLOAT, 1.0, FLT_MIN, FLT_MAX, V|E},

  546. {"i_qfactor", "qp factor between p and i frames", OFFSET(i_quant_factor), FF_OPT_TYPE_FLOAT, -0.8, -FLT_MAX, FLT_MAX, V|E},

  547. {"i_qoffset", "qp offset between p and i frames", OFFSET(i_quant_offset), FF_OPT_TYPE_FLOAT, 0.0, -FLT_MAX, FLT_MAX, V|E},

  548. {"rc_init_cplx", "initial complexity for 1-pass encoding", OFFSET(rc_initial_cplx), FF_OPT_TYPE_FLOAT, DEFAULT, -FLT_MAX, FLT_MAX, V|E},

  549. {"dct", "DCT algorithm", OFFSET(dct_algo), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|E, "dct"},

  550. {"auto", "autoselect a good one (default)", 0, FF_OPT_TYPE_CONST, FF_DCT_AUTO, INT_MIN, INT_MAX, V|E, "dct"},

  551. {"fastint", "fast integer", 0, FF_OPT_TYPE_CONST, FF_DCT_FASTINT, INT_MIN, INT_MAX, V|E, "dct"},

  552. {"int", "accurate integer", 0, FF_OPT_TYPE_CONST, FF_DCT_INT, INT_MIN, INT_MAX, V|E, "dct"},

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

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

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

  556. {"faan", "floating point AAN DCT", 0, FF_OPT_TYPE_CONST, FF_DCT_FAAN, INT_MIN, INT_MAX, V|E, "dct"},

  557. {"lumi_mask", "compresses bright areas stronger than medium ones", OFFSET(lumi_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},

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

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

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

  561. {"dark_mask", "compresses dark areas stronger than medium ones", OFFSET(dark_masking), FF_OPT_TYPE_FLOAT, 0, -FLT_MAX, FLT_MAX, V|E},

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

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

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

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

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

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

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

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

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

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

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

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

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

  575. {"simplearmv5te", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SIMPLEARMV5TE, INT_MIN, INT_MAX, V|E|D, "idct"},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  604. {"vis_qp", "visualize quantization parameter (QP), lower QP are tinted greener", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_QP, INT_MIN, INT_MAX, V|D, "debug"},

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

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

  607. {"pf", "forward predicted MVs of P-frames", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_P_FOR, INT_MIN, INT_MAX, V|D, "debug_mv"},

  608. {"bf", "forward predicted MVs of B-frames", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_B_FOR, INT_MIN, INT_MAX, V|D, "debug_mv"},

  609. {"bb", "backward predicted MVs of B-frames", 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_B_BACK, INT_MIN, INT_MAX, V|D, "debug_mv"},

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

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

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

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

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

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

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

  617. {"last_pred", "amount of motion predictors from the previous frame", OFFSET(last_predictor_count), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

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

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

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

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

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

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

  624. {"psnr", "sum of squared quantization errors (avoid, low quality)", 0, FF_OPT_TYPE_CONST, FF_CMP_PSNR, INT_MIN, INT_MAX, V|E, "cmp_func"},

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

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

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

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

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

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

  631. #ifdef CONFIG_SNOW_ENCODER

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

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

  634. #endif

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

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

  637. {"pre_dia_size", "diamond type & size for motion estimation pre-pass", OFFSET(pre_dia_size), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  661. {"rc_init_occupancy", "number of bits which should be loaded into the rc buffer before decoding starts", OFFSET(rc_initial_buffer_occupancy), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  676. {"skip_top", "number of macroblock rows at the top which are skipped", OFFSET(skip_top), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D},

  677. {"skip_bottom", "number of macroblock rows at the bottom which are skipped", OFFSET(skip_bottom), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|D},

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

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

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

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

  682. {"lowres", "decode at 1= 1/2, 2=1/4, 3=1/8 resolutions", OFFSET(lowres), FF_OPT_TYPE_INT, 0, 0, INT_MAX, V|D},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  701. {"bpyramid", "allows B-frames to be used as references for predicting", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_BPYRAMID, INT_MIN, INT_MAX, V|E, "flags2"},

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

  703. {"mixed_refs", "one reference per partition, as opposed to one reference per macroblock", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_MIXED_REFS, INT_MIN, INT_MAX, V|E, "flags2"},

  704. {"8x8dct", "high profile 8x8 transform (H.264)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_8X8DCT, INT_MIN, INT_MAX, V|E, "flags2"},

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

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

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

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

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

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

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

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

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

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

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

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

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

  718. {"sc_factor", "multiplied by qscale for each frame and added to scene_change_score", OFFSET(scenechange_factor), FF_OPT_TYPE_INT, 6, 0, INT_MAX, V|E},

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

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

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

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

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

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

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

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

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

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

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

  730. {"timecode_frame_start", "GOP timecode frame start number, in non drop frame format", OFFSET(timecode_frame_start), FF_OPT_TYPE_INT, 0, 0, INT_MAX, V|E},

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

  732. {NULL},

  733. };

  734. 

  735. #undef A

  736. #undef V

  737. #undef S

  738. #undef E

  739. #undef D

  740. #undef DEFAULT

  741. 

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

  743. 

  744. /**

  745.  * Sets the fields of the given AVCodecContext to default values.

  746.  *

  747.  * @param s The AVCodecContext of which the fields should be set to default values.

  748.  */

  749. void avcodec_get_context_defaults(AVCodecContext *s){

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

  751. 

  752.     s->av_class= &av_codec_context_class;

  753. 

  754.     av_opt_set_defaults(s);

  755. 

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

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

  758.     s->get_buffer= avcodec_default_get_buffer;

  759.     s->release_buffer= avcodec_default_release_buffer;

  760.     s->get_format= avcodec_default_get_format;

  761.     s->execute= avcodec_default_execute;

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

  763.     s->pix_fmt= PIX_FMT_NONE;

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

  765. 

  766.     s->palctrl = NULL;

  767.     s->reget_buffer= avcodec_default_reget_buffer;

  768. }

  769. 

  770. /**

  771.  * Allocates an AVCodecContext and sets its fields to default values.  The

  772.  * resulting struct can be deallocated by simply calling av_free().

  773.  *

  774.  * @return An AVCodecContext filled with default values or NULL on failure.

  775.  * @see avcodec_get_context_defaults

  776.  */

  777. AVCodecContext *avcodec_alloc_context(void){

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

  779. 

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

  781. 

  782.     avcodec_get_context_defaults(avctx);

  783. 

  784.     return avctx;

  785. }

  786. 

  787. /**

  788.  * Sets its fields of the given AVFrame to default values.

  789.  *

  790.  * @param pic The AVFrame of which the fields should be set to default values.

  791.  */

  792. void avcodec_get_frame_defaults(AVFrame *pic){

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

  794. 

  795.     pic->pts= AV_NOPTS_VALUE;

  796.     pic->key_frame= 1;

  797. }

  798. 

  799. /**

  800.  * Allocates an AVFrame and sets its fields to default values.  The resulting

  801.  * struct can be deallocated by simply calling av_free().

  802.  *

  803.  * @return An AVFrame filled with default values or NULL on failure.

  804.  * @see avcodec_get_frame_defaults

  805.  */

  806. AVFrame *avcodec_alloc_frame(void){

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

  808. 

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

  810. 

  811.     avcodec_get_frame_defaults(pic);

  812. 

  813.     return pic;

  814. }

  815. 

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

  817. {

  818.     int ret= -1;

  819. 

  820.     entangled_thread_counter++;

  821.     if(entangled_thread_counter != 1){

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

  823.         goto end;

  824.     }

  825. 

  826.     if(avctx->codec)

  827.         goto end;

  828. 

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

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

  831.         if (!avctx->priv_data)

  832.             goto end;

  833.     } else {

  834.         avctx->priv_data = NULL;

  835.     }

  836. 

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

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

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

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

  841. 

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

  843.         av_freep(&avctx->priv_data);

  844.         goto end;

  845.     }

  846. 

  847.     avctx->codec = codec;

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

  849.     avctx->frame_number = 0;

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

  851.     if (ret < 0) {

  852.         av_freep(&avctx->priv_data);

  853.         avctx->codec= NULL;

  854.         goto end;

  855.     }

  856.     ret=0;

  857. end:

  858.     entangled_thread_counter--;

  859.     return ret;

  860. }

  861. 

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

  863.                          const short *samples)

  864. {

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

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

  867.         return -1;

  868.     }

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

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

  871.         avctx->frame_number++;

  872.         return ret;

  873.     }else

  874.         return 0;

  875. }

  876. 

  877. /**

  878.  * encode a frame.

  879.  * @param buf buffer for the bitstream of encoded frame

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

  881.  * @param pict the input picture to encode, in avctx.pix_fmt

  882.  * @return -1 if error

  883.  */

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

  885.                          const AVFrame *pict)

  886. {

  887.     if(buf_size < FF_MIN_BUFFER_SIZE){

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

  889.         return -1;

  890.     }

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

  892.         return -1;

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

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

  895.         avctx->frame_number++;

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

  897. 

  898.         return ret;

  899.     }else

  900.         return 0;

  901. }

  902. 

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

  904.                             const AVSubtitle *sub)

  905. {

  906.     int ret;

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

  908.     avctx->frame_number++;

  909.     return ret;

  910. }

  911. 

  912. /**

  913.  * decode a frame.

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

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

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

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

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

  919.  * bytes used.

  920.  */

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

  922.                          int *got_picture_ptr,

  923.                          uint8_t *buf, int buf_size)

  924. {

  925.     int ret;

  926. 

  927.     *got_picture_ptr= 0;

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

  929.         return -1;

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

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

  932.                                 buf, buf_size);

  933. 

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

  935. 

  936.         if (*got_picture_ptr)

  937.             avctx->frame_number++;

  938.     }else

  939.         ret= 0;

  940. 

  941.     return ret;

  942. }

  943. 

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

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

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

  947.    *size in BYTES. */

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

  949.                          int *frame_size_ptr,

  950.                          uint8_t *buf, int buf_size)

  951. {

  952.     int ret;

  953. 

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

  955.     if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){

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

  957.         return -1;

  958.     }

  959.     if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||

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

  961.        *frame_size_ptr < buf_size){

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

  963.         return -1;

  964.     }

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

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

  967.                                 buf, buf_size);

  968.         avctx->frame_number++;

  969.     }else{

  970.         ret= 0;

  971.         *frame_size_ptr=0;

  972.     }

  973.     return ret;

  974. }

  975. 

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

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

  978.                          int *frame_size_ptr,

  979.                          uint8_t *buf, int buf_size){

  980.     *frame_size_ptr= AVCODEC_MAX_AUDIO_FRAME_SIZE;

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

  982. }

  983. #endif

  984. 

  985. 

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

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

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

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

  990.                             int *got_sub_ptr,

  991.                             const uint8_t *buf, int buf_size)

  992. {

  993.     int ret;

  994. 

  995.     *got_sub_ptr = 0;

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

  997.                                (uint8_t *)buf, buf_size);

  998.     if (*got_sub_ptr)

  999.         avctx->frame_number++;

  1000.     return ret;

  1001. }

  1002. 

  1003. int avcodec_close(AVCodecContext *avctx)

  1004. {

  1005.     entangled_thread_counter++;

  1006.     if(entangled_thread_counter != 1){

  1007.         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");

  1008.         entangled_thread_counter--;

  1009.         return -1;

  1010.     }

  1011. 

  1012.     if (avctx->codec->close)

  1013.         avctx->codec->close(avctx);

  1014.     avcodec_default_free_buffers(avctx);

  1015.     av_freep(&avctx->priv_data);

  1016.     avctx->codec = NULL;

  1017.     entangled_thread_counter--;

  1018.     return 0;

  1019. }

  1020. 

  1021. /**

  1022.  * Find an encoder with a matching codec ID.

  1023.  *

  1024.  * @param id CodecID of the requested encoder.

  1025.  * @return An encoder if one was found, NULL otherwise.

  1026.  */

  1027. AVCodec *avcodec_find_encoder(enum CodecID id)

  1028. {

  1029.     AVCodec *p;

  1030.     p = first_avcodec;

  1031.     while (p) {

  1032.         if (p->encode != NULL && p->id == id)

  1033.             return p;

  1034.         p = p->next;

  1035.     }

  1036.     return NULL;

  1037. }

  1038. 

  1039. /**

  1040.  * Find an encoder with the specified name.

  1041.  *

  1042.  * @param name Name of the requested encoder.

  1043.  * @return An encoder if one was found, NULL otherwise.

  1044.  */

  1045. AVCodec *avcodec_find_encoder_by_name(const char *name)

  1046. {

  1047.     AVCodec *p;

  1048.     p = first_avcodec;

  1049.     while (p) {

  1050.         if (p->encode != NULL && strcmp(name,p->name) == 0)

  1051.             return p;

  1052.         p = p->next;

  1053.     }

  1054.     return NULL;

  1055. }

  1056. 

  1057. /**

  1058.  * Find a decoder with a matching codec ID.

  1059.  *

  1060.  * @param id CodecID of the requested decoder.

  1061.  * @return An decoder if one was found, NULL otherwise.

  1062.  */

  1063. AVCodec *avcodec_find_decoder(enum CodecID id)

  1064. {

  1065.     AVCodec *p;

  1066.     p = first_avcodec;

  1067.     while (p) {

  1068.         if (p->decode != NULL && p->id == id)

  1069.             return p;

  1070.         p = p->next;

  1071.     }

  1072.     return NULL;

  1073. }

  1074. 

  1075. /**

  1076.  * Find an decoder with the specified name.

  1077.  *

  1078.  * @param name Name of the requested decoder.

  1079.  * @return An decoder if one was found, NULL otherwise.

  1080.  */

  1081. AVCodec *avcodec_find_decoder_by_name(const char *name)

  1082. {

  1083.     AVCodec *p;

  1084.     p = first_avcodec;

  1085.     while (p) {

  1086.         if (p->decode != NULL && strcmp(name,p->name) == 0)

  1087.             return p;

  1088.         p = p->next;

  1089.     }

  1090.     return NULL;

  1091. }

  1092. 

  1093. void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)

  1094. {

  1095.     const char *codec_name;

  1096.     AVCodec *p;

  1097.     char buf1[32];

  1098.     char channels_str[100];

  1099.     int bitrate;

  1100. 

  1101.     if (encode)

  1102.         p = avcodec_find_encoder(enc->codec_id);

  1103.     else

  1104.         p = avcodec_find_decoder(enc->codec_id);

  1105. 

  1106.     if (p) {

  1107.         codec_name = p->name;

  1108.         if (!encode && enc->codec_id == CODEC_ID_MP3) {

  1109.             if (enc->sub_id == 2)

  1110.                 codec_name = "mp2";

  1111.             else if (enc->sub_id == 1)

  1112.                 codec_name = "mp1";

  1113.         }

  1114.     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {

  1115.         /* fake mpeg2 transport stream codec (currently not

  1116.            registered) */

  1117.         codec_name = "mpeg2ts";

  1118.     } else if (enc->codec_name[0] != '\0') {

  1119.         codec_name = enc->codec_name;

  1120.     } else {

  1121.         /* output avi tags */

  1122.         if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)

  1123.            && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){

  1124.             snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",

  1125.                      enc->codec_tag & 0xff,

  1126.                      (enc->codec_tag >> 8) & 0xff,

  1127.                      (enc->codec_tag >> 16) & 0xff,

  1128.                      (enc->codec_tag >> 24) & 0xff,

  1129.                       enc->codec_tag);

  1130.         } else {

  1131.             snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);

  1132.         }

  1133.         codec_name = buf1;

  1134.     }

  1135. 

  1136.     switch(enc->codec_type) {

  1137.     case CODEC_TYPE_VIDEO:

  1138.         snprintf(buf, buf_size,

  1139.                  "Video: %s%s",

  1140.                  codec_name, enc->mb_decision ? " (hq)" : "");

  1141.         if (enc->pix_fmt != PIX_FMT_NONE) {

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

  1143.                      ", %s",

  1144.                      avcodec_get_pix_fmt_name(enc->pix_fmt));

  1145.         }

  1146.         if (enc->width) {

  1147.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1148.                      ", %dx%d",

  1149.                      enc->width, enc->height);

  1150.             if(av_log_level >= AV_LOG_DEBUG){

  1151.                 int g= ff_gcd(enc->time_base.num, enc->time_base.den);

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

  1153.                      ", %d/%d",

  1154.                      enc->time_base.num/g, enc->time_base.den/g);

  1155.             }

  1156.         }

  1157.         if (encode) {

  1158.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1159.                      ", q=%d-%d", enc->qmin, enc->qmax);

  1160.         }

  1161.         bitrate = enc->bit_rate;

  1162.         break;

  1163.     case CODEC_TYPE_AUDIO:

  1164.         snprintf(buf, buf_size,

  1165.                  "Audio: %s",

  1166.                  codec_name);

  1167.         switch (enc->channels) {

  1168.             case 1:

  1169.                 strcpy(channels_str, "mono");

  1170.                 break;

  1171.             case 2:

  1172.                 strcpy(channels_str, "stereo");

  1173.                 break;

  1174.             case 6:

  1175.                 strcpy(channels_str, "5:1");

  1176.                 break;

  1177.             default:

  1178.                 snprintf(channels_str, sizeof(channels_str), "%d channels", enc->channels);

  1179.                 break;

  1180.         }

  1181.         if (enc->sample_rate) {

  1182.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1183.                      ", %d Hz, %s",

  1184.                      enc->sample_rate,

  1185.                      channels_str);

  1186.         }

  1187. 

  1188.         /* for PCM codecs, compute bitrate directly */

  1189.         switch(enc->codec_id) {

  1190.         case CODEC_ID_PCM_S32LE:

  1191.         case CODEC_ID_PCM_S32BE:

  1192.         case CODEC_ID_PCM_U32LE:

  1193.         case CODEC_ID_PCM_U32BE:

  1194.             bitrate = enc->sample_rate * enc->channels * 32;

  1195.             break;

  1196.         case CODEC_ID_PCM_S24LE:

  1197.         case CODEC_ID_PCM_S24BE:

  1198.         case CODEC_ID_PCM_U24LE:

  1199.         case CODEC_ID_PCM_U24BE:

  1200.         case CODEC_ID_PCM_S24DAUD:

  1201.             bitrate = enc->sample_rate * enc->channels * 24;

  1202.             break;

  1203.         case CODEC_ID_PCM_S16LE:

  1204.         case CODEC_ID_PCM_S16BE:

  1205.         case CODEC_ID_PCM_U16LE:

  1206.         case CODEC_ID_PCM_U16BE:

  1207.             bitrate = enc->sample_rate * enc->channels * 16;

  1208.             break;

  1209.         case CODEC_ID_PCM_S8:

  1210.         case CODEC_ID_PCM_U8:

  1211.         case CODEC_ID_PCM_ALAW:

  1212.         case CODEC_ID_PCM_MULAW:

  1213.             bitrate = enc->sample_rate * enc->channels * 8;

  1214.             break;

  1215.         default:

  1216.             bitrate = enc->bit_rate;

  1217.             break;

  1218.         }

  1219.         break;

  1220.     case CODEC_TYPE_DATA:

  1221.         snprintf(buf, buf_size, "Data: %s", codec_name);

  1222.         bitrate = enc->bit_rate;

  1223.         break;

  1224.     case CODEC_TYPE_SUBTITLE:

  1225.         snprintf(buf, buf_size, "Subtitle: %s", codec_name);

  1226.         bitrate = enc->bit_rate;

  1227.         break;

  1228.     default:

  1229.         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);

  1230.         return;

  1231.     }

  1232.     if (encode) {

  1233.         if (enc->flags & CODEC_FLAG_PASS1)

  1234.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1235.                      ", pass 1");

  1236.         if (enc->flags & CODEC_FLAG_PASS2)

  1237.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1238.                      ", pass 2");

  1239.     }

  1240.     if (bitrate != 0) {

  1241.         snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1242.                  ", %d kb/s", bitrate / 1000);

  1243.     }

  1244. }

  1245. 

  1246. unsigned avcodec_version( void )

  1247. {

  1248.   return LIBAVCODEC_VERSION_INT;

  1249. }

  1250. 

  1251. unsigned avcodec_build( void )

  1252. {

  1253.   return LIBAVCODEC_BUILD;

  1254. }

  1255. 

  1256. static void init_crcs(void){

  1257.     av_crc04C11DB7= av_mallocz_static(sizeof(AVCRC) * 257);

  1258.     av_crc8005    = av_mallocz_static(sizeof(AVCRC) * 257);

  1259.     av_crc07      = av_mallocz_static(sizeof(AVCRC) * 257);

  1260.     av_crc_init(av_crc04C11DB7, 0, 32, 0x04c11db7, sizeof(AVCRC)*257);

  1261.     av_crc_init(av_crc8005    , 0, 16, 0x8005    , sizeof(AVCRC)*257);

  1262.     av_crc_init(av_crc07      , 0,  8, 0x07      , sizeof(AVCRC)*257);

  1263. }

  1264. 

  1265. /* must be called before any other functions */

  1266. void avcodec_init(void)

  1267. {

  1268.     static int inited = 0;

  1269. 

  1270.     if (inited != 0)

  1271.         return;

  1272.     inited = 1;

  1273. 

  1274.     dsputil_static_init();

  1275.     init_crcs();

  1276. }

  1277. 

  1278. /**

  1279.  * Flush buffers, should be called when seeking or when switching to a different stream.

  1280.  */

  1281. void avcodec_flush_buffers(AVCodecContext *avctx)

  1282. {

  1283.     if(avctx->codec->flush)

  1284.         avctx->codec->flush(avctx);

  1285. }

  1286. 

  1287. void avcodec_default_free_buffers(AVCodecContext *s){

  1288.     int i, j;

  1289. 

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

  1291. 

  1292.     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){

  1293.         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];

  1294.         for(j=0; j<4; j++){

  1295.             av_freep(&buf->base[j]);

  1296.             buf->data[j]= NULL;

  1297.         }

  1298.     }

  1299.     av_freep(&s->internal_buffer);

  1300. 

  1301.     s->internal_buffer_count=0;

  1302. }

  1303. 

  1304. char av_get_pict_type_char(int pict_type){

  1305.     switch(pict_type){

  1306.     case I_TYPE: return 'I';

  1307.     case P_TYPE: return 'P';

  1308.     case B_TYPE: return 'B';

  1309.     case S_TYPE: return 'S';

  1310.     case SI_TYPE:return 'i';

  1311.     case SP_TYPE:return 'p';

  1312.     default:     return '?';

  1313.     }

  1314. }

  1315. 

  1316. int av_get_bits_per_sample(enum CodecID codec_id){

  1317.     switch(codec_id){

  1318.     case CODEC_ID_ADPCM_SBPRO_2:

  1319.         return 2;

  1320.     case CODEC_ID_ADPCM_SBPRO_3:

  1321.         return 3;

  1322.     case CODEC_ID_ADPCM_SBPRO_4:

  1323.     case CODEC_ID_ADPCM_CT:

  1324.         return 4;

  1325.     case CODEC_ID_PCM_ALAW:

  1326.     case CODEC_ID_PCM_MULAW:

  1327.     case CODEC_ID_PCM_S8:

  1328.     case CODEC_ID_PCM_U8:

  1329.         return 8;

  1330.     case CODEC_ID_PCM_S16BE:

  1331.     case CODEC_ID_PCM_S16LE:

  1332.     case CODEC_ID_PCM_U16BE:

  1333.     case CODEC_ID_PCM_U16LE:

  1334.         return 16;

  1335.     case CODEC_ID_PCM_S24DAUD:

  1336.     case CODEC_ID_PCM_S24BE:

  1337.     case CODEC_ID_PCM_S24LE:

  1338.     case CODEC_ID_PCM_U24BE:

  1339.     case CODEC_ID_PCM_U24LE:

  1340.         return 24;

  1341.     case CODEC_ID_PCM_S32BE:

  1342.     case CODEC_ID_PCM_S32LE:

  1343.     case CODEC_ID_PCM_U32BE:

  1344.     case CODEC_ID_PCM_U32LE:

  1345.         return 32;

  1346.     default:

  1347.         return 0;

  1348.     }

  1349. }

  1350. 

  1351. #if !defined(HAVE_THREADS)

  1352. int avcodec_thread_init(AVCodecContext *s, int thread_count){

  1353.     return -1;

  1354. }

  1355. #endif

  1356. 

  1357. unsigned int av_xiphlacing(unsigned char *s, unsigned int v)

  1358. {

  1359.     unsigned int n = 0;

  1360. 

  1361.     while(v >= 0xff) {

  1362.         *s++ = 0xff;

  1363.         v -= 0xff;

  1364.         n++;

  1365.     }

  1366.     *s = v;

  1367.     n++;

  1368.     return n;

  1369. }

  1370. 

  1371. /* Wrapper to work around the lack of mkstemp() on mingw/cygin.

  1372.  * Also, tries to create file in /tmp first, if possible.

  1373.  * *prefix can be a character constant; *filename will be allocated internally.

  1374.  * Returns file descriptor of opened file (or -1 on error)

  1375.  * and opened file name in **filename. */

  1376. int av_tempfile(char *prefix, char **filename) {

  1377.     int fd=-1;

  1378. #ifdef __MINGW32__

  1379.     *filename = tempnam(".", prefix);

  1380. #else

  1381.     size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */

  1382.     *filename = av_malloc(len);

  1383. #endif

  1384.     /* -----common section-----*/

  1385.     if (*filename == NULL) {

  1386.         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");

  1387.         return -1;

  1388.     }

  1389. #ifdef __MINGW32__

  1390.     fd = open(*filename, _O_RDWR | _O_BINARY | _O_CREAT, 0444);

  1391. #else

  1392.     snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);

  1393.     fd = mkstemp(*filename);

  1394.     if (fd < 0) {

  1395.         snprintf(*filename, len, "./%sXXXXXX", prefix);

  1396.         fd = mkstemp(*filename);

  1397.     }

  1398. #endif

  1399.     /* -----common section-----*/

  1400.     if (fd < 0) {

  1401.         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);

  1402.         return -1;

  1403.     }

  1404.     return fd; /* success */

  1405. }