jpglib.c

台湾凌阳方案300万数码相机源代码

// WWW1 start
#include "general.h"
#include "cardimpt.h"
#include "libfunc.h"
// WWW1 end

void File_JpgConvertToZizag( UCHAR *src, UCHAR *dst ) USING_0
{
	BYTE k = 0;
	
	for ( k = 0; k < 64 ; k++ )
		dst[k] = src[zigzagTable[k]];
	
	return;
}

UCHAR *File_GetQTable( BYTE qTable ) USING_0
{
     switch(qTable)
     {
          case K_Q50:
		   return QTable50;
          case K_Q70:
		   return QTable70;
          case K_Q80:
		   return QTable80;
          case K_Q85:
		   return QTable85;
          case K_Q88:
		   return QTable88;
          case K_Q90:
		   return QTable90;
          case K_Q92:
		   return QTable92;
          case K_Q95:
		   return QTable95;
     }

/*	if ( qTable == K_Q50 )
		   return QTable50;
	else if ( qTable == K_Q70 )
		return QTable70;
	else if ( qTable == K_Q85 )
		return QTable85;
	else
		return QTable80;*/
	return QTable95; // WWWW
}

USHORT File_GetActImageLength( USHORT length, USHORT subsample, BYTE bDataType ) USING_0
{
	USHORT factor;

	if ( bDataType == K_File_DataType_YUV422 )
		factor = 1L << ( subsample + 3 );
	else
		factor = 1L << ( subsample + 4 );

        return length = length / factor * factor;
}