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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|E, "flags"},

  451. {"MV4", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_4MV, INT_MIN, INT_MAX, V|E, "flags"},

  452. {"OBMC", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_OBMC, INT_MIN, INT_MAX, V|E, "flags"},

  453. {"QPEL", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG_QPEL, INT_MIN, INT_MAX, V|E, "flags"},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  489. {"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},

  490. {"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},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  524. {"aspect", NULL, OFFSET(sample_aspect_ratio), FF_OPT_TYPE_RATIONAL, DEFAULT, INT_MIN, INT_MAX, V|E},

  525. {"debug", NULL, OFFSET(debug), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, V|A|S|E|D, "debug"},

  526. {"PICT", NULL, 0, FF_OPT_TYPE_CONST, FF_DEBUG_PICT_INFO, INT_MIN, INT_MAX, V|E, "debug"},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  561. {"antialias_algo", NULL, OFFSET(antialias_algo), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

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

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

  564. {"me_threshold", NULL, OFFSET(me_threshold), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX},

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  581. {NULL},

  582. };

  583. 

  584. #undef A

  585. #undef V

  586. 

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

  588. 

  589. void avcodec_get_context_defaults(AVCodecContext *s){

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

  591. 

  592.     s->av_class= &av_codec_context_class;

  593.     s->bit_rate= 800*1000;

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

  595.     s->qmin= 2;

  596.     s->qmax= 31;

  597.     s->mb_lmin= FF_QP2LAMBDA * 2;

  598.     s->mb_lmax= FF_QP2LAMBDA * 31;

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

  600.     s->qcompress= 0.5;

  601.     s->max_qdiff= 3;

  602.     s->b_quant_factor=1.25;

  603.     s->b_quant_offset=1.25;

  604.     s->i_quant_factor=-0.8;

  605.     s->i_quant_offset=0.0;

  606.     s->error_concealment= 3;

  607.     s->error_resilience= 1;

  608.     s->workaround_bugs= FF_BUG_AUTODETECT;

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

  610.     s->gop_size= 50;

  611.     s->me_method= ME_EPZS;

  612.     s->get_buffer= avcodec_default_get_buffer;

  613.     s->release_buffer= avcodec_default_release_buffer;

  614.     s->get_format= avcodec_default_get_format;

  615.     s->execute= avcodec_default_execute;

  616.     s->thread_count=1;

  617.     s->me_subpel_quality=8;

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

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

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

  621.     s->ildct_cmp= FF_CMP_VSAD;

  622.     s->profile= FF_PROFILE_UNKNOWN;

  623.     s->level= FF_LEVEL_UNKNOWN;

  624.     s->me_penalty_compensation= 256;

  625.     s->pix_fmt= PIX_FMT_NONE;

  626.     

  627.     s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;

  628.     s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;

  629.     s->palctrl = NULL;

  630.     s->reget_buffer= avcodec_default_reget_buffer;

  631. }

  632. 

  633. /**

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

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

  636.  */

  637. AVCodecContext *avcodec_alloc_context(void){

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

  639.     

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

  641.     

  642.     avcodec_get_context_defaults(avctx);

  643.     

  644.     return avctx;

  645. }

  646. 

  647. void avcodec_get_frame_defaults(AVFrame *pic){

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

  649. 

  650.     pic->pts= AV_NOPTS_VALUE;

  651.     pic->key_frame= 1;

  652. }

  653. 

  654. /**

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

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

  657.  */

  658. AVFrame *avcodec_alloc_frame(void){

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

  660.     

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

  662.     

  663.     avcodec_get_frame_defaults(pic);

  664.     

  665.     return pic;

  666. }

  667. 

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

  669. {

  670.     int ret= -1;

  671.     

  672.     entangled_thread_counter++;

  673.     if(entangled_thread_counter != 1){

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

  675.         goto end;

  676.     }

  677. 

  678.     if(avctx->codec)

  679.         goto end;

  680. 

  681.     avctx->codec = codec;

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

  683.     avctx->frame_number = 0;

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

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

  686.         if (!avctx->priv_data) 

  687.             goto end;

  688.     } else {

  689.         avctx->priv_data = NULL;

  690.     }

  691. 

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

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

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

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

  696. 

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

  698.         av_freep(&avctx->priv_data);

  699.         goto end;

  700.     }

  701. 

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

  703.     if (ret < 0) {

  704.         av_freep(&avctx->priv_data);

  705.         goto end;

  706.     }

  707.     ret=0;

  708. end:

  709.     entangled_thread_counter--;

  710.     return ret;

  711. }

  712. 

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

  714.                          const short *samples)

  715. {

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

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

  718.         return -1;

  719.     }

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

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

  722.         avctx->frame_number++;

  723.         return ret;

  724.     }else

  725.         return 0;

  726. }

  727. 

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

  729.                          const AVFrame *pict)

  730. {

  731.     if(buf_size < FF_MIN_BUFFER_SIZE){

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

  733.         return -1;

  734.     }

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

  736.         return -1;

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

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

  739.         avctx->frame_number++;

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

  741.     

  742.         return ret;

  743.     }else

  744.         return 0;

  745. }

  746. 

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

  748.                             const AVSubtitle *sub)

  749. {

  750.     int ret;

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

  752.     avctx->frame_number++;

  753.     return ret;

  754. }

  755. 

  756. /** 

  757.  * decode a frame. 

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

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

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

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

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

  763.  * bytes used. 

  764.  */

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

  766.                          int *got_picture_ptr,

  767.                          uint8_t *buf, int buf_size)

  768. {

  769.     int ret;

  770.     

  771.     *got_picture_ptr= 0;

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

  773.         return -1;

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

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

  776.                                 buf, buf_size);

  777. 

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

  779.     

  780.         if (*got_picture_ptr)                           

  781.             avctx->frame_number++;

  782.     }else

  783.         ret= 0;

  784. 

  785.     return ret;

  786. }

  787. 

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

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

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

  791.    *size in BYTES. */

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

  793.                          int *frame_size_ptr,

  794.                          uint8_t *buf, int buf_size)

  795. {

  796.     int ret;

  797. 

  798.     *frame_size_ptr= 0;

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

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

  801.                                 buf, buf_size);

  802.         avctx->frame_number++;

  803.     }else

  804.         ret= 0;

  805.     return ret;

  806. }

  807. 

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

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

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

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

  812.                             int *got_sub_ptr,

  813.                             const uint8_t *buf, int buf_size)

  814. {

  815.     int ret;

  816. 

  817.     *got_sub_ptr = 0;

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

  819.                                (uint8_t *)buf, buf_size);

  820.     if (*got_sub_ptr)

  821.         avctx->frame_number++;

  822.     return ret;

  823. }

  824. 

  825. int avcodec_close(AVCodecContext *avctx)

  826. {

  827.     entangled_thread_counter++;

  828.     if(entangled_thread_counter != 1){

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

  830.         entangled_thread_counter--;

  831.         return -1;

  832.     }

  833. 

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

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

  836.     avcodec_default_free_buffers(avctx);

  837.     av_freep(&avctx->priv_data);

  838.     avctx->codec = NULL;

  839.     entangled_thread_counter--;

  840.     return 0;

  841. }

  842. 

  843. AVCodec *avcodec_find_encoder(enum CodecID id)

  844. {

  845.     AVCodec *p;

  846.     p = first_avcodec;

  847.     while (p) {

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

  849.             return p;

  850.         p = p->next;

  851.     }

  852.     return NULL;

  853. }

  854. 

  855. AVCodec *avcodec_find_encoder_by_name(const char *name)

  856. {

  857.     AVCodec *p;

  858.     p = first_avcodec;

  859.     while (p) {

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

  861.             return p;

  862.         p = p->next;

  863.     }

  864.     return NULL;

  865. }

  866. 

  867. AVCodec *avcodec_find_decoder(enum CodecID id)

  868. {

  869.     AVCodec *p;

  870.     p = first_avcodec;

  871.     while (p) {

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

  873.             return p;

  874.         p = p->next;

  875.     }

  876.     return NULL;

  877. }

  878. 

  879. AVCodec *avcodec_find_decoder_by_name(const char *name)

  880. {

  881.     AVCodec *p;

  882.     p = first_avcodec;

  883.     while (p) {

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

  885.             return p;

  886.         p = p->next;

  887.     }

  888.     return NULL;

  889. }

  890. 

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

  892. {

  893.     const char *codec_name;

  894.     AVCodec *p;

  895.     char buf1[32];

  896.     char channels_str[100];

  897.     int bitrate;

  898. 

  899.     if (encode)

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

  901.     else

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

  903. 

  904.     if (p) {

  905.         codec_name = p->name;

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

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

  908.                 codec_name = "mp2";

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

  910.                 codec_name = "mp1";

  911.         }

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

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

  914.            registered) */

  915.         codec_name = "mpeg2ts";

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

  917.         codec_name = enc->codec_name;

  918.     } else {

  919.         /* output avi tags */

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

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

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

  923.                      enc->codec_tag & 0xff,

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

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

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

  927.                       enc->codec_tag);

  928.         } else {

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

  930.         }

  931.         codec_name = buf1;

  932.     }

  933. 

  934.     switch(enc->codec_type) {

  935.     case CODEC_TYPE_VIDEO:

  936.         snprintf(buf, buf_size,

  937.                  "Video: %s%s",

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

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

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

  941.                      ", %s",

  942.                      avcodec_get_pix_fmt_name(enc->pix_fmt));

  943.         }

  944.         if (enc->width) {

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

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

  947.                      enc->width, enc->height, 

  948.                      1/av_q2d(enc->time_base));

  949.         }

  950.         if (encode) {

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

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

  953.         }

  954.         bitrate = enc->bit_rate;

  955.         break;

  956.     case CODEC_TYPE_AUDIO:

  957.         snprintf(buf, buf_size,

  958.                  "Audio: %s",

  959.                  codec_name);

  960.         switch (enc->channels) {

  961.             case 1:

  962.                 strcpy(channels_str, "mono");

  963.                 break;

  964.             case 2:

  965.                 strcpy(channels_str, "stereo");

  966.                 break;

  967.             case 6:

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

  969.                 break;

  970.             default:

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

  972.                 break;

  973.         }

  974.         if (enc->sample_rate) {

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

  976.                      ", %d Hz, %s",

  977.                      enc->sample_rate,

  978.                      channels_str);

  979.         }

  980.         

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

  982.         switch(enc->codec_id) {

  983.         case CODEC_ID_PCM_S32LE:

  984.         case CODEC_ID_PCM_S32BE:

  985.         case CODEC_ID_PCM_U32LE:

  986.         case CODEC_ID_PCM_U32BE:

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

  988.             break;

  989.         case CODEC_ID_PCM_S24LE:

  990.         case CODEC_ID_PCM_S24BE:

  991.         case CODEC_ID_PCM_U24LE:

  992.         case CODEC_ID_PCM_U24BE:

  993.         case CODEC_ID_PCM_S24DAUD:

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

  995.             break;

  996.         case CODEC_ID_PCM_S16LE:

  997.         case CODEC_ID_PCM_S16BE:

  998.         case CODEC_ID_PCM_U16LE:

  999.         case CODEC_ID_PCM_U16BE:

  1000.             bitrate = enc->sample_rate * enc->channels * 16;

  1001.             break;

  1002.         case CODEC_ID_PCM_S8:

  1003.         case CODEC_ID_PCM_U8:

  1004.         case CODEC_ID_PCM_ALAW:

  1005.         case CODEC_ID_PCM_MULAW:

  1006.             bitrate = enc->sample_rate * enc->channels * 8;

  1007.             break;

  1008.         default:

  1009.             bitrate = enc->bit_rate;

  1010.             break;

  1011.         }

  1012.         break;

  1013.     case CODEC_TYPE_DATA:

  1014.         snprintf(buf, buf_size, "Data: %s", codec_name);

  1015.         bitrate = enc->bit_rate;

  1016.         break;

  1017.     case CODEC_TYPE_SUBTITLE:

  1018.         snprintf(buf, buf_size, "Subtitle: %s", codec_name);

  1019.         bitrate = enc->bit_rate;

  1020.         break;

  1021.     default:

  1022.         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);

  1023.         return;

  1024.     }

  1025.     if (encode) {

  1026.         if (enc->flags & CODEC_FLAG_PASS1)

  1027.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1028.                      ", pass 1");

  1029.         if (enc->flags & CODEC_FLAG_PASS2)

  1030.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1031.                      ", pass 2");

  1032.     }

  1033.     if (bitrate != 0) {

  1034.         snprintf(buf + strlen(buf), buf_size - strlen(buf), 

  1035.                  ", %d kb/s", bitrate / 1000);

  1036.     }

  1037. }

  1038. 

  1039. unsigned avcodec_version( void )

  1040. {

  1041.   return LIBAVCODEC_VERSION_INT;

  1042. }

  1043. 

  1044. unsigned avcodec_build( void )

  1045. {

  1046.   return LIBAVCODEC_BUILD;

  1047. }

  1048. 

  1049. /* must be called before any other functions */

  1050. void avcodec_init(void)

  1051. {

  1052.     static int inited = 0;

  1053. 

  1054.     if (inited != 0)

  1055. 	return;

  1056.     inited = 1;

  1057. 

  1058.     dsputil_static_init();

  1059. }

  1060. 

  1061. /**

  1062.  * Flush buffers, should be called when seeking or when swicthing to a different stream.

  1063.  */

  1064. void avcodec_flush_buffers(AVCodecContext *avctx)

  1065. {

  1066.     if(avctx->codec->flush)

  1067.         avctx->codec->flush(avctx);

  1068. }

  1069. 

  1070. void avcodec_default_free_buffers(AVCodecContext *s){

  1071.     int i, j;

  1072. 

  1073.     if(s->internal_buffer==NULL) return;

  1074.     

  1075.     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){

  1076.         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];

  1077.         for(j=0; j<4; j++){

  1078.             av_freep(&buf->base[j]);

  1079.             buf->data[j]= NULL;

  1080.         }

  1081.     }

  1082.     av_freep(&s->internal_buffer);

  1083.     

  1084.     s->internal_buffer_count=0;

  1085. }

  1086. 

  1087. char av_get_pict_type_char(int pict_type){

  1088.     switch(pict_type){

  1089.     case I_TYPE: return 'I'; 

  1090.     case P_TYPE: return 'P'; 

  1091.     case B_TYPE: return 'B'; 

  1092.     case S_TYPE: return 'S'; 

  1093.     case SI_TYPE:return 'i'; 

  1094.     case SP_TYPE:return 'p'; 

  1095.     default:     return '?';

  1096.     }

  1097. }

  1098. 

  1099. /* av_log API */

  1100. 

  1101. static int av_log_level = AV_LOG_INFO;

  1102. 

  1103. static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)

  1104. {

  1105.     static int print_prefix=1;

  1106.     AVClass* avc= ptr ? *(AVClass**)ptr : NULL;

  1107.     if(level>av_log_level)

  1108. 	return;

  1109. #undef fprintf

  1110.     if(print_prefix && avc) {

  1111. 	    fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);

  1112.     }

  1113. #define fprintf please_use_av_log

  1114.         

  1115.     print_prefix= strstr(fmt, "\n") != NULL;

  1116.         

  1117.     vfprintf(stderr, fmt, vl);

  1118. }

  1119. 

  1120. static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;

  1121. 

  1122. void av_log(void* avcl, int level, const char *fmt, ...)

  1123. {

  1124.     va_list vl;

  1125.     va_start(vl, fmt);

  1126.     av_vlog(avcl, level, fmt, vl);

  1127.     va_end(vl);

  1128. }

  1129. 

  1130. void av_vlog(void* avcl, int level, const char *fmt, va_list vl)

  1131. {

  1132.     av_log_callback(avcl, level, fmt, vl);

  1133. }

  1134. 

  1135. int av_log_get_level(void)

  1136. {

  1137.     return av_log_level;

  1138. }

  1139. 

  1140. void av_log_set_level(int level)

  1141. {

  1142.     av_log_level = level;

  1143. }

  1144. 

  1145. void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))

  1146. {

  1147.     av_log_callback = callback;

  1148. }

  1149. 

  1150. #if !defined(HAVE_THREADS)

  1151. int avcodec_thread_init(AVCodecContext *s, int thread_count){

  1152.     return -1;

  1153. }

  1154. #endif

  1155. 

  1156. unsigned int av_xiphlacing(unsigned char *s, unsigned int v)

  1157. {

  1158.     unsigned int n = 0;

  1159. 

  1160.     while(v >= 0xff) {

  1161.         *s++ = 0xff;

  1162.         v -= 0xff;

  1163.         n++;

  1164.     }

  1165.     *s = v;

  1166.     n++;

  1167.     return n;

  1168. }