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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) 2003 Michel Bardiaux for the av_log API

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

  6.  *

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

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

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

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

  11.  *

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

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

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

  15.  * Lesser General Public License for more details.

  16.  *

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

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

  19.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  20.  */

  21.  

  22. /**

  23.  * @file utils.c

  24.  * utils.

  25.  */

  26.  

  27. #include "avcodec.h"

  28. #include "dsputil.h"

  29. #include "mpegvideo.h"

  30. #include "integer.h"

  31. #include <stdarg.h>

  32. #include <limits.h>

  33. #include <float.h>

  34. 

  35. const uint8_t ff_reverse[256]={

  36. 0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,

  37. 0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,

  38. 0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,

  39. 0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,

  40. 0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,

  41. 0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,

  42. 0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,

  43. 0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,

  44. 0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,

  45. 0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,

  46. 0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,

  47. 0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,

  48. 0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,

  49. 0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,

  50. 0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,

  51. 0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,

  52. };

  53. 

  54. static int volatile entangled_thread_counter=0;

  55. 

  56. void avcodec_default_free_buffers(AVCodecContext *s);

  57. 

  58. void *av_mallocz(unsigned int size)

  59. {

  60.     void *ptr;

  61.     

  62.     ptr = av_malloc(size);

  63.     if (!ptr)

  64.         return NULL;

  65.     memset(ptr, 0, size);

  66.     return ptr;

  67. }

  68. 

  69. char *av_strdup(const char *s)

  70. {

  71.     char *ptr;

  72.     int len;

  73.     len = strlen(s) + 1;

  74.     ptr = av_malloc(len);

  75.     if (!ptr)

  76.         return NULL;

  77.     memcpy(ptr, s, len);

  78.     return ptr;

  79. }

  80. 

  81. /**

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

  83.  */

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

  85. {

  86.     if(min_size < *size) 

  87.         return ptr;

  88.     

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

  90. 

  91.     return av_realloc(ptr, *size);

  92. }

  93. 

  94. 

  95. static unsigned int last_static = 0;

  96. static unsigned int allocated_static = 0;

  97. static void** array_static = NULL;

  98. 

  99. /**

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

  101.  */

  102. void *av_mallocz_static(unsigned int size)

  103. {

  104.     void *ptr = av_mallocz(size);

  105. 

  106.     if(ptr){ 

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

  108.         if(!array_static)

  109.             return NULL;

  110.         array_static[last_static++] = ptr;

  111.     }

  112. 

  113.     return ptr;

  114. }

  115. 

  116. /**

  117.  * same as above, but does realloc

  118.  */

  119. 

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

  121. {

  122.     int i;

  123.     if(!ptr)

  124.       return av_mallocz_static(size);

  125.     /* Look for the old ptr */

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

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

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

  129.             return array_static[i];

  130.         }

  131.     }

  132.     return NULL;

  133. 

  134. }

  135. 

  136. /**

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

  138.  */

  139. void av_free_static(void)

  140. {

  141.     while(last_static){

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

  143.     }

  144.     av_freep(&array_static);

  145. }

  146. 

  147. /**

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

  149.  */

  150. 

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

  152. 

  153. static void do_free()

  154. {

  155.     av_free_static();

  156. }

  157. 

  158. /**

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

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

  161.  */

  162. void av_freep(void *arg)

  163. {

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

  165.     av_free(*ptr);

  166.     *ptr = NULL;

  167. }

  168. 

  169. /* encoder management */

  170. AVCodec *first_avcodec = NULL;

  171. 

  172. void register_avcodec(AVCodec *format)

  173. {

  174.     AVCodec **p;

  175.     p = &first_avcodec;

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

  177.     *p = format;

  178.     format->next = NULL;

  179. }

  180. 

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

  182.     s->coded_width = width;

  183.     s->coded_height= height;

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

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

  186. }

  187. 

  188. typedef struct InternalBuffer{

  189.     int last_pic_num;

  190.     uint8_t *base[4];

  191.     uint8_t *data[4];

  192.     int linesize[4];

  193. }InternalBuffer;

  194. 

  195. #define INTERNAL_BUFFER_SIZE 32

  196. 

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

  198. 

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

  200.     int w_align= 1;    

  201.     int h_align= 1;    

  202.     

  203.     switch(s->pix_fmt){

  204.     case PIX_FMT_YUV420P:

  205.     case PIX_FMT_YUV422:

  206.     case PIX_FMT_UYVY422:

  207.     case PIX_FMT_YUV422P:

  208.     case PIX_FMT_YUV444P:

  209.     case PIX_FMT_GRAY8:

  210.     case PIX_FMT_YUVJ420P:

  211.     case PIX_FMT_YUVJ422P:

  212.     case PIX_FMT_YUVJ444P:

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

  214.         h_align= 16;

  215.         break;

  216.     case PIX_FMT_YUV411P:

  217.     case PIX_FMT_UYVY411:

  218.         w_align=32;

  219.         h_align=8;

  220.         break;

  221.     case PIX_FMT_YUV410P:

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

  223.             w_align=64;

  224.             h_align=64;

  225.         }

  226.     case PIX_FMT_RGB555:

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

  228.             w_align=4;

  229.             h_align=4;

  230.         }

  231.     case PIX_FMT_PAL8:

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

  233.             w_align=4;

  234.             h_align=4;

  235.         }

  236.         break;

  237.     case PIX_FMT_BGR24:

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

  239.             w_align=4;

  240.             h_align=4;

  241.         }

  242.         break;

  243.     default:

  244.         w_align= 1;

  245.         h_align= 1;

  246.         break;

  247.     }

  248. 

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

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

  251. }

  252. 

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

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

  255.         return 0;

  256.     

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

  258.     return -1;

  259. }

  260. 

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

  262.     int i;

  263.     int w= s->width;

  264.     int h= s->height;

  265.     InternalBuffer *buf;

  266.     int *picture_number;

  267. 

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

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

  270. 

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

  272.         return -1;

  273. 

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

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

  276.     }

  277. #if 0

  278.     s->internal_buffer= av_fast_realloc(

  279.         s->internal_buffer, 

  280.         &s->internal_buffer_size, 

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

  282.         );

  283. #endif

  284.      

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

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

  287.     (*picture_number)++;

  288.     

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

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

  291.         buf->last_pic_num= *picture_number;

  292.     }else{

  293.         int h_chroma_shift, v_chroma_shift;

  294.         int pixel_size;

  295.         

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

  297.         

  298.         switch(s->pix_fmt){

  299.         case PIX_FMT_RGB555:

  300.         case PIX_FMT_RGB565:

  301.         case PIX_FMT_YUV422:

  302.         case PIX_FMT_UYVY422:

  303.             pixel_size=2;

  304.             break;

  305.         case PIX_FMT_RGB24:

  306.         case PIX_FMT_BGR24:

  307.             pixel_size=3;

  308.             break;

  309.         case PIX_FMT_RGBA32:

  310.             pixel_size=4;

  311.             break;

  312.         default:

  313.             pixel_size=1;

  314.         }

  315. 

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

  317.             

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

  319.             w+= EDGE_WIDTH*2;

  320.             h+= EDGE_WIDTH*2;

  321.         }

  322.         

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

  324. 

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

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

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

  328. 

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

  330.             buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, STRIDE_ALIGN<<(h_chroma_shift-h_shift)); 

  331. 

  332.             buf->base[i]= av_malloc((buf->linesize[i]*h>>v_shift)+16); //FIXME 16

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

  334.             memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);

  335.         

  336.             if(s->flags&CODEC_FLAG_EMU_EDGE)

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

  338.             else

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

  340.         }

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

  342.     }

  343.     pic->type= FF_BUFFER_TYPE_INTERNAL;

  344. 

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

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

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

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

  349.     }

  350.     s->internal_buffer_count++;

  351. 

  352.     return 0;

  353. }

  354. 

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

  356.     int i;

  357.     InternalBuffer *buf, *last, temp;

  358. 

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

  360.     assert(s->internal_buffer_count);

  361. 

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

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

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

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

  366.             break;

  367.     }

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

  369.     s->internal_buffer_count--;

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

  371. 

  372.     temp= *buf;

  373.     *buf= *last;

  374.     *last= temp;

  375. 

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

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

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

  379.     }

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

  381. }

  382. 

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

  384.     AVFrame temp_pic;

  385.     int i;

  386. 

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

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

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

  390.         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;

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

  392.     }

  393. 

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

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

  396.         return 0;

  397. 

  398.     /*

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

  400.      */

  401.     temp_pic = *pic;

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

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

  404.     pic->opaque = NULL;

  405.     /* Allocate new frame */

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

  407.         return -1;

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

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

  410.              s->height);

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

  412.     return 0;

  413. }

  414. 

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

  416.     int i;

  417. 

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

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

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

  421.     }

  422.     return 0;

  423. }

  424. 

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

  426.     return fmt[0];

  427. }

  428. 

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

  430.     AVCodecContext *avc= ptr;

  431. 

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

  433.         return avc->codec->name; 

  434.     else

  435.         return "NULL";

  436. }

  437. 

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

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

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

  441. #define V AV_OPT_FLAG_VIDEO_PARAM

  442. #define A AV_OPT_FLAG_AUDIO_PARAM

  443. #define S AV_OPT_FLAG_SUBTITLE_PARAM

  444. #define E AV_OPT_FLAG_ENCODING_PARAM 

  445. #define D AV_OPT_FLAG_DECODING_PARAM

  446. 

  447. static AVOption options[]={

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

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

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

  451. {"MV4", "use four motion vector by macroblock (MPEG4)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_4MV, INT_MIN, INT_MAX, V|E, "flags"},

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

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

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

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

  456. {"GMC", "use GMC", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_GMC, INT_MIN, INT_MAX, V|E, "flags"},

  457. {"MV0", "always try a MB with MV=<0,0>", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_MV0, INT_MIN, INT_MAX, V|E, "flags"},

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

  459. {"INPUT_PRESERVED", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_INPUT_PRESERVED, INT_MIN, INT_MAX, 0, "flags"},

  460. {"PASS1", "use internal 2pass ratecontrol in first  pass mode", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PASS1, INT_MIN, INT_MAX, 0, "flags"},

  461. {"PASS2", "use internal 2pass ratecontrol in second pass mode", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_PASS2, INT_MIN, INT_MAX, 0, "flags"},

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

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

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

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

  466. {"TRUNCATED", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_TRUNCATED, INT_MIN, INT_MAX, 0, "flags"},

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

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

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

  470. {"ALT", "enable alternate scantable (MPEG2/MPEG4)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_ALT_SCAN, INT_MIN, INT_MAX, V|E, "flags"},

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

  472. {"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"},

  473. {"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"},

  474. {"AIC", "H263 Advanced intra coding / MPEG4 AC prediction", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_AC_PRED, INT_MIN, INT_MAX, V|E, "flags"},

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

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

  477. {"QPRD", "use rate distortion optimization for qp selectioon", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QP_RD, INT_MIN, INT_MAX, V|E, "flags"},

  478. {"AIV", "H263 Alternative inter vlc", 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_AIV, INT_MIN, INT_MAX, V|E, "flags"},

  479. {"SLICE", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_H263P_SLICE_STRUCT, INT_MIN, INT_MAX, V|E, "flags"},

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

  481. {"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"},

  482. {"CGOP", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_CLOSED_GOP, INT_MIN, INT_MAX, V|E, "flags"},

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

  484. {"SGOP", "strictly enforce GOP size", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_STRICT_GOP, INT_MIN, INT_MAX, V|E, "flags2"},

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

  486. {"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"},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  522. {"AUTODETECT", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AUTODETECT, INT_MIN, INT_MAX, V|D, "bug"},

  523. {"OLD_MSMPEG4", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_OLD_MSMPEG4, INT_MIN, INT_MAX, V|D, "bug"},

  524. {"XVID_ILACE", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_XVID_ILACE, INT_MIN, INT_MAX, V|D, "bug"},

  525. {"UMP4", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_UMP4, INT_MIN, INT_MAX, V|D, "bug"},

  526. {"NO_PADDING", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_NO_PADDING, INT_MIN, INT_MAX, V|D, "bug"},

  527. {"AMV", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AMV, INT_MIN, INT_MAX, V|D, "bug"},

  528. {"AC_VLC", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_AC_VLC, INT_MIN, INT_MAX, V|D, "bug"},

  529. {"QPEL_CHROMA", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_QPEL_CHROMA, INT_MIN, INT_MAX, V|D, "bug"},

  530. {"STD_QPEL", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_STD_QPEL, INT_MIN, INT_MAX, V|D, "bug"},

  531. {"QPEL_CHROMA2", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_QPEL_CHROMA2, INT_MIN, INT_MAX, V|D, "bug"},

  532. {"DIRECT_BLOCKSIZE", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_DIRECT_BLOCKSIZE, INT_MIN, INT_MAX, V|D, "bug"},

  533. {"EDGE", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_EDGE, INT_MIN, INT_MAX, V|D, "bug"},

  534. {"HPEL_CHROMA", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_HPEL_CHROMA, INT_MIN, INT_MAX, V|D, "bug"},

  535. {"DC_CLIP", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_DC_CLIP, INT_MIN, INT_MAX, V|D, "bug"},

  536. {"MS", NULL, 0, FF_OPT_TYPE_CONST, FF_BUG_MS, INT_MIN, INT_MAX, V|D, "bug"},

  537. {"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},

  538. {"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},

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

  540. {"VERY", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_VERY_STRICT, INT_MIN, INT_MAX, V|E, "strict"},

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

  542. {"NORMAL", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_NORMAL, INT_MIN, INT_MAX, V|E, "strict"},

  543. {"INOFFICIAL", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_INOFFICIAL, INT_MIN, INT_MAX, V|E, "strict"},

  544. {"EXPERIMENTAL", NULL, 0, FF_OPT_TYPE_CONST, FF_COMPLIANCE_EXPERIMENTAL, INT_MIN, INT_MAX, V|E, "strict"},

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

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

  547. {"CAREFUL", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_CAREFUL, INT_MIN, INT_MAX, V|D, "er"},

  548. {"COMPLIANT", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_COMPLIANT, INT_MIN, INT_MAX, V|D, "er"},

  549. {"AGGRESSIVE", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_AGGRESSIVE, INT_MIN, INT_MAX, V|D, "er"},

  550. {"VERY_AGGRESSIVE", NULL, 0, FF_OPT_TYPE_CONST, FF_ER_VERY_AGGRESSIVE, INT_MIN, INT_MAX, V|D, "er"},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  570. {"AUTO", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_AUTO, INT_MIN, INT_MAX, V|E, "dct"},

  571. {"FASTINT", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_FASTINT, INT_MIN, INT_MAX, V|E, "dct"},

  572. {"INT", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_INT, INT_MIN, INT_MAX, V|E, "dct"},

  573. {"MMX", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_MMX, INT_MIN, INT_MAX, V|E, "dct"},

  574. {"MLIB", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_MLIB, INT_MIN, INT_MAX, V|E, "dct"},

  575. {"ALTIVEC", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_ALTIVEC, INT_MIN, INT_MAX, V|E, "dct"},

  576. {"FAAN", NULL, 0, FF_OPT_TYPE_CONST, FF_DCT_FAAN, INT_MIN, INT_MAX, V|E, "dct"},

  577. {"lumi_mask", NULL, OFFSET(lumi_masking), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

  578. {"tcplx_mask", NULL, OFFSET(temporal_cplx_masking), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

  579. {"scplx_mask", NULL, OFFSET(spatial_cplx_masking), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

  580. {"p_mask", NULL, OFFSET(p_masking), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

  581. {"dark_mask", NULL, OFFSET(dark_masking), FF_OPT_TYPE_FLOAT, DEFAULT, FLT_MIN, FLT_MAX, V|E},

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

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

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

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

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

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

  588. {"LIBMPEG2MMX", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_LIBMPEG2MMX, INT_MIN, INT_MAX, V|E|D, "idct"},

  589. {"PS2", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_PS2, INT_MIN, INT_MAX, V|E|D, "idct"},

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

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

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

  593. {"SH4", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_SH4, INT_MIN, INT_MAX, V|E|D, "idct"},

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

  595. {"H264", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_H264, INT_MIN, INT_MAX, V|E|D, "idct"},

  596. {"VP3", NULL, 0, FF_OPT_TYPE_CONST, FF_IDCT_VP3, INT_MIN, INT_MAX, V|E|D, "idct"},

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

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

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

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

  601. {"GUESS_MVS", NULL, 0, FF_OPT_TYPE_CONST, FF_EC_GUESS_MVS, INT_MIN, INT_MAX, V|D, "ec"},

  602. {"DEBLOCK", NULL, 0, FF_OPT_TYPE_CONST, FF_EC_DEBLOCK, INT_MIN, INT_MAX, V|D, "ec"},

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

  604. {"pred", NULL, OFFSET(prediction_method), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E, "pred"},

  605. {"LEFT", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_LEFT, INT_MIN, INT_MAX, V|E, "pred"},

  606. {"PLANE", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_PLANE, INT_MIN, INT_MAX, V|E, "pred"},

  607. {"MEDIAN", NULL, 0, FF_OPT_TYPE_CONST, FF_PRED_MEDIAN, INT_MIN, INT_MAX, V|E, "pred"},

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

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

  610. {"PICT", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_PICT_INFO, INT_MIN, INT_MAX, V|D, "debug"},

  611. {"RC", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_RC, INT_MIN, INT_MAX, V|E, "debug"},

  612. {"BITSTREAM", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_BITSTREAM, INT_MIN, INT_MAX, V|D, "debug"},

  613. {"MB_TYPE", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},

  614. {"QP", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_QP, INT_MIN, INT_MAX, V|D, "debug"},

  615. {"MV", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_MV, INT_MIN, INT_MAX, V|D, "debug"},

  616. {"DCT_COEFF", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_DCT_COEFF, INT_MIN, INT_MAX, V|D, "debug"},

  617. {"SKIP", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_SKIP, INT_MIN, INT_MAX, V|D, "debug"},

  618. {"STARTCODE", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_STARTCODE, INT_MIN, INT_MAX, V|D, "debug"},

  619. {"PTS", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_PTS, INT_MIN, INT_MAX, V|D, "debug"},

  620. {"ER", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_ER, INT_MIN, INT_MAX, V|D, "debug"},

  621. {"MMCO", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_MMCO, INT_MIN, INT_MAX, V|D, "debug"},

  622. {"BUGS", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_BUGS, INT_MIN, INT_MAX, V|D, "debug"},

  623. {"VIS_QP", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_QP, INT_MIN, INT_MAX, V|D, "debug"},

  624. {"VIS_MB_TYPE", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MB_TYPE, INT_MIN, INT_MAX, V|D, "debug"},

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

  626. {"PF", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_P_FOR, INT_MIN, INT_MAX, V|D, "debug_mv"},

  627. {"BF", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_B_FOR, INT_MIN, INT_MAX, V|D, "debug_mv"},

  628. {"BB", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_VIS_MV_B_BACK, INT_MIN, INT_MAX, V|D, "debug_mv"},

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

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

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

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

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

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

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

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

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

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

  639. {"SAD", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_SAD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  640. {"SSE", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_SSE, INT_MIN, INT_MAX, V|E, "cmp_func"},

  641. {"SATD", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_SATD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  642. {"DCT", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_DCT, INT_MIN, INT_MAX, V|E, "cmp_func"},

  643. {"PSNR", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_PSNR, INT_MIN, INT_MAX, V|E, "cmp_func"},

  644. {"BIT", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_BIT, INT_MIN, INT_MAX, V|E, "cmp_func"},

  645. {"RD", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_RD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  646. {"ZERO", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_ZERO, INT_MIN, INT_MAX, V|E, "cmp_func"},

  647. {"VSAD", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_VSAD, INT_MIN, INT_MAX, V|E, "cmp_func"},

  648. {"VSSE", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_VSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},

  649. {"NSSE", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_NSSE, INT_MIN, INT_MAX, V|E, "cmp_func"},

  650. {"W53", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_W53, INT_MIN, INT_MAX, V|E, "cmp_func"},

  651. {"W97", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_W97, INT_MIN, INT_MAX, V|E, "cmp_func"},

  652. {"DCTMAX", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_DCTMAX, INT_MIN, INT_MAX, V|E, "cmp_func"},

  653. {"CHROMA", NULL, 0, FF_OPT_TYPE_CONST, FF_CMP_CHROMA, INT_MIN, INT_MAX, V|E, "cmp_func"},

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

  655. {"subq", NULL, OFFSET(me_subpel_quality), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, V|E},

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

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

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

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

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

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

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

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

  664. {"VLC", NULL, 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_VLC, INT_MIN, INT_MAX, V|E, "coder"},

  665. {"AC", NULL, 0, FF_OPT_TYPE_CONST, FF_CODER_TYPE_AC, INT_MIN, INT_MAX, V|E, "coder"},

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

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

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

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

  670. {"SIMPLE", NULL, 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_SIMPLE, INT_MIN, INT_MAX, V|E, "mbd"},

  671. {"BITS", NULL, 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_BITS, INT_MIN, INT_MAX, V|E, "mbd"},

  672. {"RD", NULL, 0, FF_OPT_TYPE_CONST, FF_MB_DECISION_RD, INT_MIN, INT_MAX, V|E, "mbd"},

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

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

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

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

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

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

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

  680. {"flags2", NULL, OFFSET(flags2), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

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

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

  683. {"AUTO", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_AUTO, INT_MIN, INT_MAX, V|D, "aa"},

  684. {"FASTINT", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_FASTINT, INT_MIN, INT_MAX, V|D, "aa"},

  685. {"INT", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_INT, INT_MIN, INT_MAX, V|D, "aa"},

  686. {"FLOAT", NULL, 0, FF_OPT_TYPE_CONST, FF_AA_FLOAT, INT_MIN, INT_MAX, V|D, "aa"},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  708. {NULL},

  709. };

  710. 

  711. #undef A

  712. #undef V

  713. 

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

  715. 

  716. void avcodec_get_context_defaults(AVCodecContext *s){

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

  718. 

  719.     s->av_class= &av_codec_context_class;

  720.     s->bit_rate= 800*1000;

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

  722.     s->qmin= 2;

  723.     s->qmax= 31;

  724.     s->mb_lmin= FF_QP2LAMBDA * 2;

  725.     s->mb_lmax= FF_QP2LAMBDA * 31;

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

  727.     s->qcompress= 0.5;

  728.     s->max_qdiff= 3;

  729.     s->b_quant_factor=1.25;

  730.     s->b_quant_offset=1.25;

  731.     s->i_quant_factor=-0.8;

  732.     s->i_quant_offset=0.0;

  733.     s->error_concealment= 3;

  734.     s->error_resilience= 1;

  735.     s->workaround_bugs= FF_BUG_AUTODETECT;

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

  737.     s->gop_size= 50;

  738.     s->me_method= ME_EPZS;

  739.     s->get_buffer= avcodec_default_get_buffer;

  740.     s->release_buffer= avcodec_default_release_buffer;

  741.     s->get_format= avcodec_default_get_format;

  742.     s->execute= avcodec_default_execute;

  743.     s->thread_count=1;

  744.     s->me_subpel_quality=8;

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

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

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

  748.     s->ildct_cmp= FF_CMP_VSAD;

  749.     s->profile= FF_PROFILE_UNKNOWN;

  750.     s->level= FF_LEVEL_UNKNOWN;

  751.     s->me_penalty_compensation= 256;

  752.     s->pix_fmt= PIX_FMT_NONE;

  753.     s->frame_skip_cmp= FF_CMP_DCTMAX;

  754.     

  755.     s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;

  756.     s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;

  757.     s->palctrl = NULL;

  758.     s->reget_buffer= avcodec_default_reget_buffer;

  759. }

  760. 

  761. /**

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

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

  764.  */

  765. AVCodecContext *avcodec_alloc_context(void){

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

  767.     

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

  769.     

  770.     avcodec_get_context_defaults(avctx);

  771.     

  772.     return avctx;

  773. }

  774. 

  775. void avcodec_get_frame_defaults(AVFrame *pic){

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

  777. 

  778.     pic->pts= AV_NOPTS_VALUE;

  779.     pic->key_frame= 1;

  780. }

  781. 

  782. /**

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

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

  785.  */

  786. AVFrame *avcodec_alloc_frame(void){

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

  788.     

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

  790.     

  791.     avcodec_get_frame_defaults(pic);

  792.     

  793.     return pic;

  794. }

  795. 

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

  797. {

  798.     int ret= -1;

  799.     

  800.     entangled_thread_counter++;

  801.     if(entangled_thread_counter != 1){

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

  803.         goto end;

  804.     }

  805. 

  806.     if(avctx->codec)

  807.         goto end;

  808. 

  809.     avctx->codec = codec;

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

  811.     avctx->frame_number = 0;

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

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

  814.         if (!avctx->priv_data) 

  815.             goto end;

  816.     } else {

  817.         avctx->priv_data = NULL;

  818.     }

  819. 

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

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

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

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

  824. 

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

  826.         av_freep(&avctx->priv_data);

  827.         goto end;

  828.     }

  829. 

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

  831.     if (ret < 0) {

  832.         av_freep(&avctx->priv_data);

  833.         goto end;

  834.     }

  835.     ret=0;

  836. end:

  837.     entangled_thread_counter--;

  838.     return ret;

  839. }

  840. 

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

  842.                          const short *samples)

  843. {

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

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

  846.         return -1;

  847.     }

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

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

  850.         avctx->frame_number++;

  851.         return ret;

  852.     }else

  853.         return 0;

  854. }

  855. 

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

  857.                          const AVFrame *pict)

  858. {

  859.     if(buf_size < FF_MIN_BUFFER_SIZE){

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

  861.         return -1;

  862.     }

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

  864.         return -1;

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

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

  867.         avctx->frame_number++;

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

  869.     

  870.         return ret;

  871.     }else

  872.         return 0;

  873. }

  874. 

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

  876.                             const AVSubtitle *sub)

  877. {

  878.     int ret;

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

  880.     avctx->frame_number++;

  881.     return ret;

  882. }

  883. 

  884. /** 

  885.  * decode a frame. 

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

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

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

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

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

  891.  * bytes used. 

  892.  */

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

  894.                          int *got_picture_ptr,

  895.                          uint8_t *buf, int buf_size)

  896. {

  897.     int ret;

  898.     

  899.     *got_picture_ptr= 0;

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

  901.         return -1;

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

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

  904.                                 buf, buf_size);

  905. 

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

  907.     

  908.         if (*got_picture_ptr)                           

  909.             avctx->frame_number++;

  910.     }else

  911.         ret= 0;

  912. 

  913.     return ret;

  914. }

  915. 

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

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

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

  919.    *size in BYTES. */

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

  921.                          int *frame_size_ptr,

  922.                          uint8_t *buf, int buf_size)

  923. {

  924.     int ret;

  925. 

  926.     *frame_size_ptr= 0;

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

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

  929.                                 buf, buf_size);

  930.         avctx->frame_number++;

  931.     }else

  932.         ret= 0;

  933.     return ret;

  934. }

  935. 

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

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

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

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

  940.                             int *got_sub_ptr,

  941.                             const uint8_t *buf, int buf_size)

  942. {

  943.     int ret;

  944. 

  945.     *got_sub_ptr = 0;

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

  947.                                (uint8_t *)buf, buf_size);

  948.     if (*got_sub_ptr)

  949.         avctx->frame_number++;

  950.     return ret;

  951. }

  952. 

  953. int avcodec_close(AVCodecContext *avctx)

  954. {

  955.     entangled_thread_counter++;

  956.     if(entangled_thread_counter != 1){

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

  958.         entangled_thread_counter--;

  959.         return -1;

  960.     }

  961. 

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

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

  964.     avcodec_default_free_buffers(avctx);

  965.     av_freep(&avctx->priv_data);

  966.     avctx->codec = NULL;

  967.     entangled_thread_counter--;

  968.     return 0;

  969. }

  970. 

  971. AVCodec *avcodec_find_encoder(enum CodecID id)

  972. {

  973.     AVCodec *p;

  974.     p = first_avcodec;

  975.     while (p) {

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

  977.             return p;

  978.         p = p->next;

  979.     }

  980.     return NULL;

  981. }

  982. 

  983. AVCodec *avcodec_find_encoder_by_name(const char *name)

  984. {

  985.     AVCodec *p;

  986.     p = first_avcodec;

  987.     while (p) {

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

  989.             return p;

  990.         p = p->next;

  991.     }

  992.     return NULL;

  993. }

  994. 

  995. AVCodec *avcodec_find_decoder(enum CodecID id)

  996. {

  997.     AVCodec *p;

  998.     p = first_avcodec;

  999.     while (p) {

  1000.         if (p->decode != NULL && p->id == id)

  1001.             return p;

  1002.         p = p->next;

  1003.     }

  1004.     return NULL;

  1005. }

  1006. 

  1007. AVCodec *avcodec_find_decoder_by_name(const char *name)

  1008. {

  1009.     AVCodec *p;

  1010.     p = first_avcodec;

  1011.     while (p) {

  1012.         if (p->decode != NULL && strcmp(name,p->name) == 0)

  1013.             return p;

  1014.         p = p->next;

  1015.     }

  1016.     return NULL;

  1017. }

  1018. 

  1019. void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)

  1020. {

  1021.     const char *codec_name;

  1022.     AVCodec *p;

  1023.     char buf1[32];

  1024.     char channels_str[100];

  1025.     int bitrate;

  1026. 

  1027.     if (encode)

  1028.         p = avcodec_find_encoder(enc->codec_id);

  1029.     else

  1030.         p = avcodec_find_decoder(enc->codec_id);

  1031. 

  1032.     if (p) {

  1033.         codec_name = p->name;

  1034.         if (!encode && enc->codec_id == CODEC_ID_MP3) {

  1035.             if (enc->sub_id == 2)

  1036.                 codec_name = "mp2";

  1037.             else if (enc->sub_id == 1)

  1038.                 codec_name = "mp1";

  1039.         }

  1040.     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {

  1041.         /* fake mpeg2 transport stream codec (currently not

  1042.            registered) */

  1043.         codec_name = "mpeg2ts";

  1044.     } else if (enc->codec_name[0] != '\0') {

  1045.         codec_name = enc->codec_name;

  1046.     } else {

  1047.         /* output avi tags */

  1048.         if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF) 

  1049.            && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){

  1050.             snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X", 

  1051.                      enc->codec_tag & 0xff,

  1052.                      (enc->codec_tag >> 8) & 0xff,

  1053.                      (enc->codec_tag >> 16) & 0xff,

  1054.                      (enc->codec_tag >> 24) & 0xff,

  1055.                       enc->codec_tag);

  1056.         } else {

  1057.             snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);

  1058.         }

  1059.         codec_name = buf1;

  1060.     }

  1061. 

  1062.     switch(enc->codec_type) {

  1063.     case CODEC_TYPE_VIDEO:

  1064.         snprintf(buf, buf_size,

  1065.                  "Video: %s%s",

  1066.                  codec_name, enc->mb_decision ? " (hq)" : "");

  1067.         if (enc->pix_fmt != PIX_FMT_NONE) {

  1068.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1069.                      ", %s",

  1070.                      avcodec_get_pix_fmt_name(enc->pix_fmt));

  1071.         }

  1072.         if (enc->width) {

  1073.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1074.                      ", %dx%d, %0.2f fps",

  1075.                      enc->width, enc->height, 

  1076.                      1/av_q2d(enc->time_base));

  1077.         }

  1078.         if (encode) {

  1079.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1080.                      ", q=%d-%d", enc->qmin, enc->qmax);

  1081.         }

  1082.         bitrate = enc->bit_rate;

  1083.         break;

  1084.     case CODEC_TYPE_AUDIO:

  1085.         snprintf(buf, buf_size,

  1086.                  "Audio: %s",

  1087.                  codec_name);

  1088.         switch (enc->channels) {

  1089.             case 1:

  1090.                 strcpy(channels_str, "mono");

  1091.                 break;

  1092.             case 2:

  1093.                 strcpy(channels_str, "stereo");

  1094.                 break;

  1095.             case 6:

  1096.                 strcpy(channels_str, "5:1");

  1097.                 break;

  1098.             default:

  1099.                 snprintf(channels_str, sizeof(channels_str), "%d channels", enc->channels);

  1100.                 break;

  1101.         }

  1102.         if (enc->sample_rate) {

  1103.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1104.                      ", %d Hz, %s",

  1105.                      enc->sample_rate,

  1106.                      channels_str);

  1107.         }

  1108.         

  1109.         /* for PCM codecs, compute bitrate directly */

  1110.         switch(enc->codec_id) {

  1111.         case CODEC_ID_PCM_S32LE:

  1112.         case CODEC_ID_PCM_S32BE:

  1113.         case CODEC_ID_PCM_U32LE:

  1114.         case CODEC_ID_PCM_U32BE:

  1115.             bitrate = enc->sample_rate * enc->channels * 32;

  1116.             break;

  1117.         case CODEC_ID_PCM_S24LE:

  1118.         case CODEC_ID_PCM_S24BE:

  1119.         case CODEC_ID_PCM_U24LE:

  1120.         case CODEC_ID_PCM_U24BE:

  1121.         case CODEC_ID_PCM_S24DAUD:

  1122.             bitrate = enc->sample_rate * enc->channels * 24;

  1123.             break;

  1124.         case CODEC_ID_PCM_S16LE:

  1125.         case CODEC_ID_PCM_S16BE:

  1126.         case CODEC_ID_PCM_U16LE:

  1127.         case CODEC_ID_PCM_U16BE:

  1128.             bitrate = enc->sample_rate * enc->channels * 16;

  1129.             break;

  1130.         case CODEC_ID_PCM_S8:

  1131.         case CODEC_ID_PCM_U8:

  1132.         case CODEC_ID_PCM_ALAW:

  1133.         case CODEC_ID_PCM_MULAW:

  1134.             bitrate = enc->sample_rate * enc->channels * 8;

  1135.             break;

  1136.         default:

  1137.             bitrate = enc->bit_rate;

  1138.             break;

  1139.         }

  1140.         break;

  1141.     case CODEC_TYPE_DATA:

  1142.         snprintf(buf, buf_size, "Data: %s", codec_name);

  1143.         bitrate = enc->bit_rate;

  1144.         break;

  1145.     case CODEC_TYPE_SUBTITLE:

  1146.         snprintf(buf, buf_size, "Subtitle: %s", codec_name);

  1147.         bitrate = enc->bit_rate;

  1148.         break;

  1149.     default:

  1150.         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);

  1151.         return;

  1152.     }

  1153.     if (encode) {

  1154.         if (enc->flags & CODEC_FLAG_PASS1)

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

  1156.                      ", pass 1");

  1157.         if (enc->flags & CODEC_FLAG_PASS2)

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

  1159.                      ", pass 2");

  1160.     }

  1161.     if (bitrate != 0) {

  1162.         snprintf(buf + strlen(buf), buf_size - strlen(buf), 

  1163.                  ", %d kb/s", bitrate / 1000);

  1164.     }

  1165. }

  1166. 

  1167. unsigned avcodec_version( void )

  1168. {

  1169.   return LIBAVCODEC_VERSION_INT;

  1170. }

  1171. 

  1172. unsigned avcodec_build( void )

  1173. {

  1174.   return LIBAVCODEC_BUILD;

  1175. }

  1176. 

  1177. /* must be called before any other functions */

  1178. void avcodec_init(void)

  1179. {

  1180.     static int inited = 0;

  1181. 

  1182.     if (inited != 0)

  1183. 	return;

  1184.     inited = 1;

  1185. 

  1186.     dsputil_static_init();

  1187. }

  1188. 

  1189. /**

  1190.  * Flush buffers, should be called when seeking or when swicthing to a different stream.

  1191.  */

  1192. void avcodec_flush_buffers(AVCodecContext *avctx)

  1193. {

  1194.     if(avctx->codec->flush)

  1195.         avctx->codec->flush(avctx);

  1196. }

  1197. 

  1198. void avcodec_default_free_buffers(AVCodecContext *s){

  1199.     int i, j;

  1200. 

  1201.     if(s->internal_buffer==NULL) return;

  1202.     

  1203.     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){

  1204.         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];

  1205.         for(j=0; j<4; j++){

  1206.             av_freep(&buf->base[j]);

  1207.             buf->data[j]= NULL;

  1208.         }

  1209.     }

  1210.     av_freep(&s->internal_buffer);

  1211.     

  1212.     s->internal_buffer_count=0;

  1213. }

  1214. 

  1215. char av_get_pict_type_char(int pict_type){

  1216.     switch(pict_type){

  1217.     case I_TYPE: return 'I'; 

  1218.     case P_TYPE: return 'P'; 

  1219.     case B_TYPE: return 'B'; 

  1220.     case S_TYPE: return 'S'; 

  1221.     case SI_TYPE:return 'i'; 

  1222.     case SP_TYPE:return 'p'; 

  1223.     default:     return '?';

  1224.     }

  1225. }

  1226. 

  1227. /* av_log API */

  1228. 

  1229. static int av_log_level = AV_LOG_INFO;

  1230. 

  1231. static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)

  1232. {

  1233.     static int print_prefix=1;

  1234.     AVClass* avc= ptr ? *(AVClass**)ptr : NULL;

  1235.     if(level>av_log_level)

  1236. 	return;

  1237. #undef fprintf

  1238.     if(print_prefix && avc) {

  1239. 	    fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);

  1240.     }

  1241. #define fprintf please_use_av_log

  1242.         

  1243.     print_prefix= strstr(fmt, "\n") != NULL;

  1244.         

  1245.     vfprintf(stderr, fmt, vl);

  1246. }

  1247. 

  1248. static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;

  1249. 

  1250. void av_log(void* avcl, int level, const char *fmt, ...)

  1251. {

  1252.     va_list vl;

  1253.     va_start(vl, fmt);

  1254.     av_vlog(avcl, level, fmt, vl);

  1255.     va_end(vl);

  1256. }

  1257. 

  1258. void av_vlog(void* avcl, int level, const char *fmt, va_list vl)

  1259. {

  1260.     av_log_callback(avcl, level, fmt, vl);

  1261. }

  1262. 

  1263. int av_log_get_level(void)

  1264. {

  1265.     return av_log_level;

  1266. }

  1267. 

  1268. void av_log_set_level(int level)

  1269. {

  1270.     av_log_level = level;

  1271. }

  1272. 

  1273. void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))

  1274. {

  1275.     av_log_callback = callback;

  1276. }

  1277. 

  1278. #if !defined(HAVE_THREADS)

  1279. int avcodec_thread_init(AVCodecContext *s, int thread_count){

  1280.     return -1;

  1281. }

  1282. #endif

  1283. 

  1284. unsigned int av_xiphlacing(unsigned char *s, unsigned int v)

  1285. {

  1286.     unsigned int n = 0;

  1287. 

  1288.     while(v >= 0xff) {

  1289.         *s++ = 0xff;

  1290.         v -= 0xff;

  1291.         n++;

  1292.     }

  1293.     *s = v;

  1294.     n++;

  1295.     return n;

  1296. }