jtables.h

非常不错的jpeg压缩/解压代码,可以实现常用的JPEG压缩/解

static BYTE zigzag[64]={ 0, 1, 5, 6,14,15,27,28,
		  2, 4, 7,13,16,26,29,42,
		  3, 8,12,17,25,30,41,43,
		  9,11,18,24,31,40,44,53,
		 10,19,23,32,39,45,52,54,
		 20,22,33,38,46,51,55,60,
		 21,34,37,47,50,56,59,61,
		 35,36,48,49,57,58,62,63 };

  /* These are the sample quantization tables given in JPEG spec section K.1.
	The spec says that the values given produce "good" quality, and
	when divided by 2, "very good" quality.*/
static BYTE std_luminance_qt[64] = {
	16,  11,  10,  16,  24,  40,  51,  61,
	12,  12,  14,  19,  26,  58,  60,  55,
	14,  13,  16,  24,  40,  57,  69,  56,
	14,  17,  22,  29,  51,  87,  80,  62,
	18,  22,  37,  56,  68, 109, 103,  77,
	24,  35,  55,  64,  81, 104, 113,  92,
	49,  64,  78,  87, 103, 121, 120, 101,
	72,  92,  95,  98, 112, 100, 103,  99
  };
static BYTE std_chrominance_qt[64] = {
	17,  18,  24,  47,  99,  99,  99,  99,
	18,  21,  26,  66,  99,  99,  99,  99,
	24,  26,  56,  99,  99,  99,  99,  99,
	47,  66,  99,  99,  99,  99,  99,  99,
	99,  99,  99,  99,  99,  99,  99,  99,
	99,  99,  99,  99,  99,  99,  99,  99,
	99,  99,  99,  99,  99,  99,  99,  99,
	99,  99,  99,  99,  99,  99,  99,  99
  };
// Standard Huffman tables (cf. JPEG standard section K.3) */

static BYTE std_dc_luminance_nrcodes[17]={0,0,1,5,1,1,1,1,1,1,0,0,0,0,0,0,0};
static BYTE std_dc_luminance_values[12]={0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};

static BYTE std_dc_chrominance_nrcodes[17]={0,0,3,1,1,1,1,1,1,1,1,1,0,0,0,0,0};
static BYTE std_dc_chrominance_values[12]={0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};

static BYTE std_ac_luminance_nrcodes[17]={0,0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,0x7d };
static BYTE std_ac_luminance_values[162]= {
	  0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
	  0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
	  0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
	  0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
	  0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
	  0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
	  0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
	  0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
	  0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
	  0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
	  0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
	  0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
	  0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
	  0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
	  0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
	  0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
	  0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
	  0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
	  0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
	  0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
	  0xf9, 0xfa };

static BYTE std_ac_chrominance_nrcodes[17]={0,0,2,1,2,4,4,3,4,7,5,4,4,0,1,2,0x77};
static BYTE std_ac_chrominance_values[162]={
	  0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
	  0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
	  0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
	  0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
	  0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
	  0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
	  0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
	  0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
	  0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
	  0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
	  0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
	  0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
	  0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
	  0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
	  0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
	  0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
	  0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
	  0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
	  0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
	  0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
	  0xf9, 0xfa };