yuv2rgb.txt

asm code for yuv to rgb conversion function

    #include <stdio.h>   
    #include <stdlib.h>   
    #include <sys time.h="">   
     
    struct dummy   
    {   
        int             yuv[3];   
        int             stride[3];   
    };   
      
   typedef struct AVPicture   
   {   
       unsigned char  *data[4];   
       int             linesize[4];       ///< number of bytes per line   
   } AVPicture;   
     
  //void convert_yuv420_rgb565( unsigned char *src, unsigned short *dst_ori, int width, int height );   
   //void convert_yuv420_rgb565(AVPicture *picture, unsigned char *results, int w, int h) ;   
   //void convert_yuv420_rgb565(struct dummy *picture, unsigned char *results, int w, int h);   
     void convert_yuv420_rgb565(struct dummy *picture, unsigned char *results, unsigned char *_py,unsigned char *_pu,unsigned char *_pv);   
   int main( int argc, char *argv[] )   
   {   
       int             fileback;   
       int             frameWidth=176;   
       int             frameHeight=144;   
       int             rgbstride= (640+128)*2;   
       int             destwidth=640;   
       int             destheight=240;   
       int             frameSize;   
       struct timeval  tm_start,tm_end;   
       int             elapsedTime;   
       unsigned char  *bufferYUV;   
       unsigned short *bufferRGB;   
       FILE           *filedata;   
       struct dummy    picture;   
   //  AVPicture       picture;   
      
       if ( argc < 2 )   
       {   
           fprintf(stderr, "160 120 \n");   
           return 1;   
       }   
      
       frameWidth = atoi( argv[1] );   
       frameHeight = atoi( argv[2] );   
      
       frameSize = frameWidth * frameHeight * 3 / 2;   
      
       bufferYUV = (unsigned char *)malloc( frameSize );   
       bufferRGB = (unsigned short *)malloc( 768*240 *2 );   
      
       filedata = fopen( "input06_YUV420_176_144.raw", "rb" ); /*file name *****/   
     
       if ( !filedata )   
       {   
          fprintf( stderr, "couldn't open the source file \n" );   
           return 1;   
      }   
       fileback = fread( bufferYUV, 1, frameSize, filedata );   
       if ( fileback != frameSize )   
       {   
           printf( "error: the resolution doesn't agree with file size\n" );   
           return 1;   
       }   
       fclose( filedata );   
      
       filedata = fopen( "output.raw", "wb" ); /****rgb file name **************/   
       if ( !filedata )   
       {   
           fprintf( stderr, "couldn't open the source file \n" );   
           return 1;   
      }   
      
   #if 1   
      // picture.yuv[0] = bufferYUV;   
      //picture.yuv[1] = bufferYUV + frameWidth * frameHeight;   
     // picture.yuv[2] = bufferYUV + frameWidth * frameHeight * 5 / 4;   
          picture.yuv[0] =   destwidth;   
         picture.yuv[1] =   destheight;   
         picture.yuv[2] =  0;   
         
   //  picture.stride[0] = frameWidth * frameHeight;   
   //  picture.stride[1] = picture.stride[2] = frameWidth * frameHeight / 4;   
       //picture.stride[0] = frameWidth;   
       //picture.stride[1] = picture.stride[2] = frameWidth / 2;   
         picture.stride[0] = frameWidth;   
         picture.stride[1] = frameHeight;   
         picture.stride[2] = rgbstride;     
   #else   
       picture.data[0] = bufferYUV;   
       picture.data[1] = bufferYUV + frameWidth * frameHeight;   
       picture.data[2] = bufferYUV + frameWidth * frameHeight * 5 / 4;   
       picture.data[3] = NULL;   
      
      picture.linesize[0] = frameWidth;   
      picture.linesize[1] = picture.linesize[2] = frameWidth / 2;   
       picture.linesize[3] = 0;   
   #endif   
      
       unsigned char *_py ;   
      _py = bufferYUV;   
      unsigned char *_pu;   
      _pu = bufferYUV + frameWidth * frameHeight;   
      unsigned char *_pv;   
     _pv = bufferYUV  +frameWidth * frameHeight*5/4;   
     
     
     
      gettimeofday( &tm_start, NULL );   
      convert_yuv420_rgb565( &picture, (unsigned char *)bufferRGB, _py,_pu,_pv);   
      gettimeofday( &tm_end, NULL );   
      elapsedTime = (int)( tm_end.tv_sec - tm_start.tv_sec ) * 1000000L + (int)( tm_end.tv_usec - tm_start.tv_usec );   
     printf( "total time elapsed: %d (us)\n", elapsedTime );   
     
      fwrite( bufferRGB, 1, 768*240*2, filedata );   
     fclose( filedata );   
     
      //house keeping   
      free( bufferYUV );   
      free( bufferRGB );   
     
      return 0;   
  } /* main */   
  </sys></stdlib.h></stdio.h>