scan.c

由bmp生成mpeg2 的I_frame 数据

/*******************************************************************

 *******************************************************************/
#define SCAN_C
#include "scan.h"

const unsigned char scan_table[2][64] = {
	{
		(0+0*8),(1+0*8),(0+1*8),(0+2*8),(1+1*8),(2+0*8),(3+0*8),(2+1*8),
		(1+2*8),(0+3*8),(0+4*8),(1+3*8),(2+2*8),(3+1*8),(4+0*8),(5+0*8),
		(4+1*8),(3+2*8),(2+3*8),(1+4*8),(0+5*8),(0+6*8),(1+5*8),(2+4*8),
		(3+3*8),(4+2*8),(5+1*8),(6+0*8),(7+0*8),(6+1*8),(5+2*8),(4+3*8),
		(3+4*8),(2+5*8),(1+6*8),(0+7*8),(1+7*8),(2+6*8),(3+5*8),(4+4*8),
		(5+3*8),(6+2*8),(7+1*8),(7+2*8),(6+3*8),(5+4*8),(4+5*8),(3+6*8),
		(2+7*8),(3+7*8),(4+6*8),(5+5*8),(6+4*8),(7+3*8),(7+4*8),(6+5*8),
		(5+6*8),(4+7*8),(5+7*8),(6+6*8),(7+5*8),(7+6*8),(6+7*8),(7+7*8),
	},
	{
		(0+0*8),(0+1*8),(0+2*8),(0+3*8),(1+0*8),(1+1*8),(2+0*8),(2+1*8),
		(1+2*8),(1+3*8),(0+4*8),(0+5*8),(0+6*8),(0+7*8),(1+7*8),(1+6*8),
		(1+5*8),(1+4*8),(2+3*8),(2+2*8),(3+0*8),(3+1*8),(4+0*8),(4+1*8),
		(3+2*8),(3+3*8),(2+4*8),(2+5*8),(2+6*8),(2+7*8),(3+4*8),(3+5*8),
		(3+6*8),(3+7*8),(4+2*8),(4+3*8),(5+0*8),(5+1*8),(6+0*8),(6+1*8),
		(5+2*8),(5+3*8),(4+4*8),(4+5*8),(4+6*8),(4+7*8),(5+4*8),(5+5*8),
		(5+6*8),(5+7*8),(6+2*8),(6+3*8),(7+0*8),(7+1*8),(7+2*8),(7+3*8),
		(6+4*8),(6+5*8),(6+6*8),(6+7*8),(7+4*8),(7+5*8),(7+6*8),(7+7*8),
	}
};

const unsigned short default_intra_quantizer_matrix[64] = {
	 8, 16, 19, 22, 26, 27, 29, 34,
	16, 16, 22, 24, 27, 29, 34, 37,
	19, 22, 26, 27, 29, 34, 34, 38,
	22, 22, 26, 27, 29, 34, 37, 40,
	22, 26, 27, 29, 32, 35, 40, 48,
	26, 27, 29, 32, 35, 40, 48, 58,
	26, 27, 29, 34, 38, 46, 56, 69,
	27, 29, 35, 38, 46, 56, 69, 83,
};