JPEG标准中推荐的缺省huffman编码表

  /* created(bruin, 2002.11.26) */

  typedef unsigned char BYTE;

  /* entry in huffman table: the entry index is the symbol value */

  typedef struct{

  BYTE size; /* number of bits of the huffman code. <= 16 */

  WORD code; /* huffman code in the least signficant bits */

  }HUFF_ENTRY;

  /* JPEG DHT format of 4 typical huffman tables given in “ISO/IEC 10918-1, 1993(e), Annex K”:

  + luminance DC coefficient difference,

  + luminance AC coefficient,

  + chrominance DC coefficient difference, and

  + chrominance AC coeeficient

  this block of data can be obtained by simply dumping a typical jpeg file.

  */

  注意:霍夫曼表一般包括四个部分,直流亮度霍夫曼值(DC Luminance)、交流亮度霍夫曼值(AC Luminance)、直流色度霍夫曼值(DC Chrominance)、交流色度霍夫曼值(AC Chrominance),但是在具体应用中,这四部分的顺序是可以调整的,比如在mjpg-Streamer中的顺序是:直流亮度、直流色度、交流亮度、交流色度。

  static BYTE s_default_dht[] = {

  0xff,0xc4, /* DHT (Define Huffman Table) identifier */

  0x01,0xa2, /* section size: 0x01a2, from this two bytes to the end, inclusive */

  0x00, /* DC Luminance */

  0x00,0x01,0x05,0x01,0x01,0x01,0x01,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* BITS */

  0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b, /* HUFFVALS */

  0x10, /* AC Luminance */

  0x00,0x02,0x01,0x03,0x03,0x02,0x04,0x03,0x05,0x05,0x04,0x04,0x00,0x00,0x01,0x7d, /* BITS */

  0x01,0x02,0x03,0x00,0x04,0x11,0x05,0x12,0x21,0x31,0x41,0x06,0x13,0x51,0x61,0x07, /* HUFFVALS */

  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,

  0x01, /* DC Chrominance */

  0x00,0x03,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,0x00,0x00,0x00,0x00, /* BITS */

  0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b, /* HUFFVALS */

  0x11, /* AC Chrominance */

  0x00,0x02,0x01,0x02,0x04,0x04,0x03,0x04,0x07,0x05,0x04,0x04,0x00,0x01,0x02,0x77, /* BITS */

  0x00,0x01,0x02,0x03,0x11,0x04,0x05,0x21,0x31,0x06,0x12,0x41,0x51,0x07,0x61,0x71, /* HUFFVALS */

  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

  };

  /* the following are huffman tables derived from above DHT data by using algorithms

  given in “ISO/IEC 10918-1, 1993(e), Annex C”.

  given: BITS (a 16 byte list giving the nr of codes for each code length from 1 to 16 )

  HUFFVAL (a list of 8-bit symbol values, each of which is assigned a huffman

  code, the symbol values are placed in the list in the order of increasing

  code length. code lengths greater then 16 are not allowed.)

  to create:

  HUFFSIZE (a list of code lengths, the list size is the sum of 16 byte in BITS)

  HUFFCODE (the huffman codes corresponding to those lengths in HUFFSIZE)

  the following code fragment could be used to create HUFFSIZE table:

  k = 0;

  for(i = 0; i < 16; i ++)

  for(j = 0; j < BITS[i]; j ++){

  HUFFSIZE[k++] = i + 1;

  }

  huffsize_table_size = k;

  the following code fragment could be used to create HUFFCODE table:

  code = 0x00;

  for(i = 0; i < huffsize_table_size; i ++){

  if(i == 0 || (HUFFCODE[i] == HUFFCODE[i – 1])){

  HUFFCODE[i] = code;

  code ++;

  }

  else{

  code <<= (HUFFSIZE[i] – HUFFSIZE[i – 1]);

  HUFFCODE[i] = code;

  code ++;

  }

  }

  the following code fragment coould be used to check validity of the given BITS,

  in case one need to check a given BITS:

  bool check_bits(unsigned char bits[16]){

  int i;

  int c = 0xffff;

  for(i = 0; i < 16; i ++){

  printf(“i=%d, c=%d\n”, i, c);

  if((c = c – bits[i] * pow(2, (15 – i))) < 0){

  printf(“error at %d, bits[%d]=%d\n”, i, i, bits[i]);

  return false;

  }

  }

  return true;

  }

  in the following 4 generated huffman tables, the array index is symbol values (HUFFVAL),

  while each element contains the code length (HUFFSIZE) and the code (HUFFCODE) for

  the corresponding symbol value (also the “code word” is illustrated in the comments

  for each element).

  be noted that in AC tables, for those symbol values do not included the huffman table,

  it’s HUFFSIZE and HUFFCODE been set to 0.

  */

  static HUFF_ENTRY s_lumin_dc[12] = {

  { 2, 0x0000}, /* 00 */

  { 3, 0x0002}, /* 010 */

  { 3, 0x0003}, /* 011 */

  { 3, 0x0004}, /* 100 */

  { 3, 0x0005}, /* 101 */

  { 3, 0x0006}, /* 110 */

  { 4, 0x000e}, /* 1110 */

  { 5, 0x001e}, /* 11110 */

  { 6, 0x003e}, /* 111110 */

  { 7, 0x007e}, /* 1111110 */

  { 8, 0x00fe}, /* 11111110 */

  { 9, 0x01fe} /* 111111110 */

  };

  static HUFF_ENTRY s_chrom_dc[12] = {

  { 2, 0x0000}, /* 00 */

  { 2, 0x0001}, /* 01 */

  { 2, 0x0002}, /* 10 */

  { 3, 0x0006}, /* 110 */

  { 4, 0x000e}, /* 1110 */

  { 5, 0x001e}, /* 11110 */

  { 6, 0x003e}, /* 111110 */

  { 7, 0x007e}, /* 1111110 */

  { 8, 0x00fe}, /* 11111110 */

  { 9, 0x01fe}, /* 111111110 */

  {10, 0x03fe}, /* 1111111110 */

  {11, 0x07fe} /* 11111111110 */

  };

  /* 162 valid entries */

  static HUFF_ENTRY s_lumin_ac[256] = {

  { 4, 0x000a}, /* 0x00: 1010 */

  { 2, 0x0000}, /* 0x01: 00 */

  { 2, 0x0001}, /* 0x02: 01 */

  { 3, 0x0004}, /* 0x03: 100 */

  { 4, 0x000b}, /* 0x04: 1011 */

  { 5, 0x001a}, /* 0x05: 11010 */

  { 7, 0x0078}, /* 0x06: 1111000 */

  { 8, 0x00f8}, /* 0x07: 11111000 */

  {10, 0x03f6}, /* 0x08: 1111110110 */

  {16, 0xff82}, /* 0x09: 1111111110000010 */

  {16, 0xff83}, /* 0x0a: 1111111110000011 */

  { 0, 0x0000}, /* 0x0b: */

  { 0, 0x0000}, /* 0x0c: */

  { 0, 0x0000}, /* 0x0d: */

  { 0, 0x0000}, /* 0x0e: */

  { 0, 0x0000}, /* 0x0f: */

  { 0, 0x0000}, /* 0x10: */

  { 4, 0x000c}, /* 0x11: 1100 */

  { 5, 0x001b}, /* 0x12: 11011 */

  { 7, 0x0079}, /* 0x13: 1111001 */

  { 9, 0x01f6}, /* 0x14: 111110110 */

  {11, 0x07f6}, /* 0x15: 11111110110 */

  {16, 0xff84}, /* 0x16: 1111111110000100 */

  {16, 0xff85}, /* 0x17: 1111111110000101 */

  {16, 0xff86}, /* 0x18: 1111111110000110 */

  {16, 0xff87}, /* 0x19: 1111111110000111 */

  {16, 0xff88}, /* 0x1a: 1111111110001000 */

  { 0, 0x0000}, /* 0x1b: */

  { 0, 0x0000}, /* 0x1c: */

  { 0, 0x0000}, /* 0x1d: */

  { 0, 0x0000}, /* 0x1e: */

  { 0, 0x0000}, /* 0x1f: */

  { 0, 0x0000}, /* 0x20: */

  { 5, 0x001c}, /* 0x21: 11100 */

  { 8, 0x00f9}, /* 0x22: 11111001 */

  {10, 0x03f7}, /* 0x23: 1111110111 */

  {12, 0x0ff4}, /* 0x24: 111111110100 */

  {16, 0xff89}, /* 0x25: 1111111110001001 */

  {16, 0xff8a}, /* 0x26: 1111111110001010 */

  {16, 0xff8b}, /* 0x27: 1111111110001011 */

  {16, 0xff8c}, /* 0x28: 1111111110001100 */

  {16, 0xff8d}, /* 0x29: 1111111110001101 */

  {16, 0xff8e}, /* 0x2a: 1111111110001110 */

  { 0, 0x0000}, /* 0x2b: */

  { 0, 0x0000}, /* 0x2c: */

  { 0, 0x0000}, /* 0x2d: */

  { 0, 0x0000}, /* 0x2e: */

  { 0, 0x0000}, /* 0x2f: */

  { 0, 0x0000}, /* 0x30: */

  { 6, 0x003a}, /* 0x31: 111010 */

  { 9, 0x01f7}, /* 0x32: 111110111 */

  {12, 0x0ff5}, /* 0x33: 111111110101 */

  {16, 0xff8f}, /* 0x34: 1111111110001111 */

  {16, 0xff90}, /* 0x35: 1111111110010000 */

  {16, 0xff91}, /* 0x36: 1111111110010001 */

  {16, 0xff92}, /* 0x37: 1111111110010010 */

  {16, 0xff93}, /* 0x38: 1111111110010011 */

  {16, 0xff94}, /* 0x39: 1111111110010100 */

  {16, 0xff95}, /* 0x3a: 1111111110010101 */

  { 0, 0x0000}, /* 0x3b: */

  { 0, 0x0000}, /* 0x3c: */

  { 0, 0x0000}, /* 0x3d: */

  { 0, 0x0000}, /* 0x3e: */

  { 0, 0x0000}, /* 0x3f: */

  { 0, 0x0000}, /* 0x40: */

  { 6, 0x003b}, /* 0x41: 111011 */

  {10, 0x03f8}, /* 0x42: 1111111000 */

  {16, 0xff96}, /* 0x43: 1111111110010110 */

  {16, 0xff97}, /* 0x44: 1111111110010111 */

  {16, 0xff98}, /* 0x45: 1111111110011000 */

  {16, 0xff99}, /* 0x46: 1111111110011001 */

  {16, 0xff9a}, /* 0x47: 1111111110011010 */

  {16, 0xff9b}, /* 0x48: 1111111110011011 */

  {16, 0xff9c}, /* 0x49: 1111111110011100 */

  {16, 0xff9d}, /* 0x4a: 1111111110011101 */

  { 0, 0x0000}, /* 0x4b: */

  { 0, 0x0000}, /* 0x4c: */

  { 0, 0x0000}, /* 0x4d: */

  { 0, 0x0000}, /* 0x4e: */

  { 0, 0x0000}, /* 0x4f: */

  { 0, 0x0000}, /* 0x50: */

  { 7, 0x007a}, /* 0x51: 1111010 */

  {11, 0x07f7}, /* 0x52: 11111110111 */

  {16, 0xff9e}, /* 0x53: 1111111110011110 */

  {16, 0xff9f}, /* 0x54: 1111111110011111 */

  {16, 0xffa0}, /* 0x55: 1111111110100000 */

  {16, 0xffa1}, /* 0x56: 1111111110100001 */

  {16, 0xffa2}, /* 0x57: 1111111110100010 */

  {16, 0xffa3}, /* 0x58: 1111111110100011 */

  {16, 0xffa4}, /* 0x59: 1111111110100100 */

  {16, 0xffa5}, /* 0x5a: 1111111110100101 */

  { 0, 0x0000}, /* 0x5b: */

  { 0, 0x0000}, /* 0x5c: */

  { 0, 0x0000}, /* 0x5d: */

  { 0, 0x0000}, /* 0x5e: */

  { 0, 0x0000}, /* 0x5f: */

  { 0, 0x0000}, /* 0x60: */

  { 7, 0x007b}, /* 0x61: 1111011 */

  {12, 0x0ff6}, /* 0x62: 111111110110 */

  {16, 0xffa6}, /* 0x63: 1111111110100110 */

  {16, 0xffa7}, /* 0x64: 1111111110100111 */

  {16, 0xffa8}, /* 0x65: 1111111110101000 */

  {16, 0xffa9}, /* 0x66: 1111111110101001 */

  {16, 0xffaa}, /* 0x67: 1111111110101010 */

  {16, 0xffab}, /* 0x68: 1111111110101011 */

  {16, 0xffac}, /* 0x69: 1111111110101100 */

  {16, 0xffad}, /* 0x6a: 1111111110101101 */

  { 0, 0x0000}, /* 0x6b: */

  { 0, 0x0000}, /* 0x6c: */

  { 0, 0x0000}, /* 0x6d: */

  { 0, 0x0000}, /* 0x6e: */

  { 0, 0x0000}, /* 0x6f: */

  { 0, 0x0000}, /* 0x70: */

  { 8, 0x00fa}, /* 0x71: 11111010 */

  {12, 0x0ff7}, /* 0x72: 111111110111 */

  {16, 0xffae}, /* 0x73: 1111111110101110 */

  {16, 0xffaf}, /* 0x74: 1111111110101111 */

  {16, 0xffb0}, /* 0x75: 1111111110110000 */

  {16, 0xffb1}, /* 0x76: 1111111110110001 */

  {16, 0xffb2}, /* 0x77: 1111111110110010 */

  {16, 0xffb3}, /* 0x78: 1111111110110011 */

  {16, 0xffb4}, /* 0x79: 1111111110110100 */

  {16, 0xffb5}, /* 0x7a: 1111111110110101 */

  { 0, 0x0000}, /* 0x7b: */

  { 0, 0x0000}, /* 0x7c: */

  { 0, 0x0000}, /* 0x7d: */

  { 0, 0x0000}, /* 0x7e: */

  { 0, 0x0000}, /* 0x7f: */

  { 0, 0x0000}, /* 0x80: */

  { 9, 0x01f8}, /* 0x81: 111111000 */

  {15, 0x7fc0}, /* 0x82: 111111111000000 */

  {16, 0xffb6}, /* 0x83: 1111111110110110 */

  {16, 0xffb7}, /* 0x84: 1111111110110111 */

  {16, 0xffb8}, /* 0x85: 1111111110111000 */

  {16, 0xffb9}, /* 0x86: 1111111110111001 */

  {16, 0xffba}, /* 0x87: 1111111110111010 */

  {16, 0xffbb}, /* 0x88: 1111111110111011 */

  {16, 0xffbc}, /* 0x89: 1111111110111100 */

  {16, 0xffbd}, /* 0x8a: 1111111110111101 */

  { 0, 0x0000}, /* 0x8b: */

  { 0, 0x0000}, /* 0x8c: */

  { 0, 0x0000}, /* 0x8d: */

  { 0, 0x0000}, /* 0x8e: */

  { 0, 0x0000}, /* 0x8f: */

  { 0, 0x0000}, /* 0x90: */

  { 9, 0x01f9}, /* 0x91: 111111001 */

  {16, 0xffbe}, /* 0x92: 1111111110111110 */

  {16, 0xffbf}, /* 0x93: 1111111110111111 */

  {16, 0xffc0}, /* 0x94: 1111111111000000 */

  {16, 0xffc1}, /* 0x95: 1111111111000001 */

  {16, 0xffc2}, /* 0x96: 1111111111000010 */

  {16, 0xffc3}, /* 0x97: 1111111111000011 */

  {16, 0xffc4}, /* 0x98: 1111111111000100 */

  {16, 0xffc5}, /* 0x99: 1111111111000101 */

  {16, 0xffc6}, /* 0x9a: 1111111111000110 */

  { 0, 0x0000}, /* 0x9b: */

  { 0, 0x0000}, /* 0x9c: */

  { 0, 0x0000}, /* 0x9d: */

  { 0, 0x0000}, /* 0x9e: */

  { 0, 0x0000}, /* 0x9f: */

  { 0, 0x0000}, /* 0xa0: */

  { 9, 0x01fa}, /* 0xa1: 111111010 */

  {16, 0xffc7}, /* 0xa2: 1111111111000111 */

  {16, 0xffc8}, /* 0xa3: 1111111111001000 */

  {16, 0xffc9}, /* 0xa4: 1111111111001001 */

  {16, 0xffca}, /* 0xa5: 1111111111001010 */

  {16, 0xffcb}, /* 0xa6: 1111111111001011 */

  {16, 0xffcc}, /* 0xa7: 1111111111001100 */

  {16, 0xffcd}, /* 0xa8: 1111111111001101 */

  {16, 0xffce}, /* 0xa9: 1111111111001110 */

  {16, 0xffcf}, /* 0xaa: 1111111111001111 */

  { 0, 0x0000}, /* 0xab: */

  { 0, 0x0000}, /* 0xac: */

  { 0, 0x0000}, /* 0xad: */

  { 0, 0x0000}, /* 0xae: */

  { 0, 0x0000}, /* 0xaf: */

  { 0, 0x0000}, /* 0xb0: */

  {10, 0x03f9}, /* 0xb1: 1111111001 */

  {16, 0xffd0}, /* 0xb2: 1111111111010000 */

  {16, 0xffd1}, /* 0xb3: 1111111111010001 */

  {16, 0xffd2}, /* 0xb4: 1111111111010010 */

  {16, 0xffd3}, /* 0xb5: 1111111111010011 */

  {16, 0xffd4}, /* 0xb6: 1111111111010100 */

  {16, 0xffd5}, /* 0xb7: 1111111111010101 */

  {16, 0xffd6}, /* 0xb8: 1111111111010110 */

  {16, 0xffd7}, /* 0xb9: 1111111111010111 */

  {16, 0xffd8}, /* 0xba: 1111111111011000 */

  { 0, 0x0000}, /* 0xbb: */

  { 0, 0x0000}, /* 0xbc: */

  { 0, 0x0000}, /* 0xbd: */

  { 0, 0x0000}, /* 0xbe: */

  { 0, 0x0000}, /* 0xbf: */

  { 0, 0x0000}, /* 0xc0: */

  {10, 0x03fa}, /* 0xc1: 1111111010 */

  {16, 0xffd9}, /* 0xc2: 1111111111011001 */

  {16, 0xffda}, /* 0xc3: 1111111111011010 */

  {16, 0xffdb}, /* 0xc4: 1111111111011011 */

  {16, 0xffdc}, /* 0xc5: 1111111111011100 */

  {16, 0xffdd}, /* 0xc6: 1111111111011101 */

  {16, 0xffde}, /* 0xc7: 1111111111011110 */

  {16, 0xffdf}, /* 0xc8: 1111111111011111 */

  {16, 0xffe0}, /* 0xc9: 1111111111100000 */

  {16, 0xffe1}, /* 0xca: 1111111111100001 */

  { 0, 0x0000}, /* 0xcb: */

  { 0, 0x0000}, /* 0xcc: */

  { 0, 0x0000}, /* 0xcd: */

  { 0, 0x0000}, /* 0xce: */

  { 0, 0x0000}, /* 0xcf: */

  { 0, 0x0000}, /* 0xd0: */

  {11, 0x07f8}, /* 0xd1: 11111111000 */

  {16, 0xffe2}, /* 0xd2: 1111111111100010 */

  {16, 0xffe3}, /* 0xd3: 1111111111100011 */

  {16, 0xffe4}, /* 0xd4: 1111111111100100 */

  {16, 0xffe5}, /* 0xd5: 1111111111100101 */

  {16, 0xffe6}, /* 0xd6: 1111111111100110 */

  {16, 0xffe7}, /* 0xd7: 1111111111100111 */

  {16, 0xffe8}, /* 0xd8: 1111111111101000 */

  {16, 0xffe9}, /* 0xd9: 1111111111101001 */

  {16, 0xffea}, /* 0xda: 1111111111101010 */

  { 0, 0x0000}, /* 0xdb: */

  { 0, 0x0000}, /* 0xdc: */

  { 0, 0x0000}, /* 0xdd: */

  { 0, 0x0000}, /* 0xde: */

  { 0, 0x0000}, /* 0xdf: */

  { 0, 0x0000}, /* 0xe0: */

  {16, 0xffeb}, /* 0xe1: 1111111111101011 */

  {16, 0xffec}, /* 0xe2: 1111111111101100 */

  {16, 0xffed}, /* 0xe3: 1111111111101101 */

  {16, 0xffee}, /* 0xe4: 1111111111101110 */

  {16, 0xffef}, /* 0xe5: 1111111111101111 */

  {16, 0xfff0}, /* 0xe6: 1111111111110000 */

  {16, 0xfff1}, /* 0xe7: 1111111111110001 */

  {16, 0xfff2}, /* 0xe8: 1111111111110010 */

  {16, 0xfff3}, /* 0xe9: 1111111111110011 */

  {16, 0xfff4}, /* 0xea: 1111111111110100 */

  { 0, 0x0000}, /* 0xeb: */

  { 0, 0x0000}, /* 0xec: */

  { 0, 0x0000}, /* 0xed: */

  { 0, 0x0000}, /* 0xee: */

  { 0, 0x0000}, /* 0xef: */

  {11, 0x07f9}, /* 0xf0: 11111111001 */

  {16, 0xfff5}, /* 0xf1: 1111111111110101 */

  {16, 0xfff6}, /* 0xf2: 1111111111110110 */

  {16, 0xfff7}, /* 0xf3: 1111111111110111 */

  {16, 0xfff8}, /* 0xf4: 1111111111111000 */

  {16, 0xfff9}, /* 0xf5: 1111111111111001 */

  {16, 0xfffa}, /* 0xf6: 1111111111111010 */

  {16, 0xfffb}, /* 0xf7: 1111111111111011 */

  {16, 0xfffc}, /* 0xf8: 1111111111111100 */

  {16, 0xfffd}, /* 0xf9: 1111111111111101 */

  {16, 0xfffe}, /* 0xfa: 1111111111111110 */

  { 0, 0x0000}, /* 0xfb: */

  { 0, 0x0000}, /* 0xfc: */

  { 0, 0x0000}, /* 0xfd: */

  { 0, 0x0000}, /* 0xfe: */

  { 0, 0x0000}, /* 0xff: */

  };

  /* 162 valid entries */

  static HUFF_ENTRY s_chrom_ac[256] = {

  { 2, 0x0000}, /* 0x00: 00 */

  { 2, 0x0001}, /* 0x01: 01 */

  { 3, 0x0004}, /* 0x02: 100 */

  { 4, 0x000a}, /* 0x03: 1010 */

  { 5, 0x0018}, /* 0x04: 11000 */

  { 5, 0x0019}, /* 0x05: 11001 */

  { 6, 0x0038}, /* 0x06: 111000 */

  { 7, 0x0078}, /* 0x07: 1111000 */

  { 9, 0x01f4}, /* 0x08: 111110100 */

  {10, 0x03f6}, /* 0x09: 1111110110 */

  {12, 0x0ff4}, /* 0x0a: 111111110100 */

  { 0, 0x0000}, /* 0x0b: */

  { 0, 0x0000}, /* 0x0c: */

  { 0, 0x0000}, /* 0x0d: */

  { 0, 0x0000}, /* 0x0e: */

  { 0, 0x0000}, /* 0x0f: */

  { 0, 0x0000}, /* 0x10: */

  { 4, 0x000b}, /* 0x11: 1011 */

  { 6, 0x0039}, /* 0x12: 111001 */

  { 8, 0x00f6}, /* 0x13: 11110110 */

  { 9, 0x01f5}, /* 0x14: 111110101 */

  {11, 0x07f6}, /* 0x15: 11111110110 */

  {12, 0x0ff5}, /* 0x16: 111111110101 */

  {16, 0xff88}, /* 0x17: 1111111110001000 */

  {16, 0xff89}, /* 0x18: 1111111110001001 */

  {16, 0xff8a}, /* 0x19: 1111111110001010 */

  {16, 0xff8b}, /* 0x1a: 1111111110001011 */

  { 0, 0x0000}, /* 0x1b: */

  { 0, 0x0000}, /* 0x1c: */

  { 0, 0x0000}, /* 0x1d: */

  { 0, 0x0000}, /* 0x1e: */

  { 0, 0x0000}, /* 0x1f: */

  { 0, 0x0000}, /* 0x20: */

  { 5, 0x001a}, /* 0x21: 11010 */

  { 8, 0x00f7}, /* 0x22: 11110111 */

  {10, 0x03f7}, /* 0x23: 1111110111 */

  {12, 0x0ff6}, /* 0x24: 111111110110 */

  {15, 0x7fc2}, /* 0x25: 111111111000010 */

  {16, 0xff8c}, /* 0x26: 1111111110001100 */

  {16, 0xff8d}, /* 0x27: 1111111110001101 */

  {16, 0xff8e}, /* 0x28: 1111111110001110 */

  {16, 0xff8f}, /* 0x29: 1111111110001111 */

  {16, 0xff90}, /* 0x2a: 1111111110010000 */

  { 0, 0x0000}, /* 0x2b: */

  { 0, 0x0000}, /* 0x2c: */

  { 0, 0x0000}, /* 0x2d: */

  { 0, 0x0000}, /* 0x2e: */

  { 0, 0x0000}, /* 0x2f: */

  { 0, 0x0000}, /* 0x30: */

  { 5, 0x001b}, /* 0x31: 11011 */

  { 8, 0x00f8}, /* 0x32: 11111000 */

  {10, 0x03f8}, /* 0x33: 1111111000 */

  {12, 0x0ff7}, /* 0x34: 111111110111 */

  {16, 0xff91}, /* 0x35: 1111111110010001 */

  {16, 0xff92}, /* 0x36: 1111111110010010 */

  {16, 0xff93}, /* 0x37: 1111111110010011 */

  {16, 0xff94}, /* 0x38: 1111111110010100 */

  {16, 0xff95}, /* 0x39: 1111111110010101 */

  {16, 0xff96}, /* 0x3a: 1111111110010110 */

  { 0, 0x0000}, /* 0x3b: */

  { 0, 0x0000}, /* 0x3c: */

  { 0, 0x0000}, /* 0x3d: */

  { 0, 0x0000}, /* 0x3e: */

  { 0, 0x0000}, /* 0x3f: */

  { 0, 0x0000}, /* 0x40: */

  { 6, 0x003a}, /* 0x41: 111010 */

  { 9, 0x01f6}, /* 0x42: 111110110 */

  {16, 0xff97}, /* 0x43: 1111111110010111 */

  {16, 0xff98}, /* 0x44: 1111111110011000 */

  {16, 0xff99}, /* 0x45: 1111111110011001 */

  {16, 0xff9a}, /* 0x46: 1111111110011010 */

  {16, 0xff9b}, /* 0x47: 1111111110011011 */

  {16, 0xff9c}, /* 0x48: 1111111110011100 */

  {16, 0xff9d}, /* 0x49: 1111111110011101 */

  {16, 0xff9e}, /* 0x4a: 1111111110011110 */

  { 0, 0x0000}, /* 0x4b: */

  { 0, 0x0000}, /* 0x4c: */

  { 0, 0x0000}, /* 0x4d: */

  { 0, 0x0000}, /* 0x4e: */

  { 0, 0x0000}, /* 0x4f: */

  { 0, 0x0000}, /* 0x50: */

  { 6, 0x003b}, /* 0x51: 111011 */

  {10, 0x03f9}, /* 0x52: 1111111001 */

  {16, 0xff9f}, /* 0x53: 1111111110011111 */

  {16, 0xffa0}, /* 0x54: 1111111110100000 */

  {16, 0xffa1}, /* 0x55: 1111111110100001 */

  {16, 0xffa2}, /* 0x56: 1111111110100010 */

  {16, 0xffa3}, /* 0x57: 1111111110100011 */

  {16, 0xffa4}, /* 0x58: 1111111110100100 */

  {16, 0xffa5}, /* 0x59: 1111111110100101 */

  {16, 0xffa6}, /* 0x5a: 1111111110100110 */

  { 0, 0x0000}, /* 0x5b: */

  { 0, 0x0000}, /* 0x5c: */

  { 0, 0x0000}, /* 0x5d: */

  { 0, 0x0000}, /* 0x5e: */

  { 0, 0x0000}, /* 0x5f: */

  { 0, 0x0000}, /* 0x60: */

  { 7, 0x0079}, /* 0x61: 1111001 */

  {11, 0x07f7}, /* 0x62: 11111110111 */

  {16, 0xffa7}, /* 0x63: 1111111110100111 */

  {16, 0xffa8}, /* 0x64: 1111111110101000 */

  {16, 0xffa9}, /* 0x65: 1111111110101001 */

  {16, 0xffaa}, /* 0x66: 1111111110101010 */

  {16, 0xffab}, /* 0x67: 1111111110101011 */

  {16, 0xffac}, /* 0x68: 1111111110101100 */

  {16, 0xffad}, /* 0x69: 1111111110101101 */

  {16, 0xffae}, /* 0x6a: 1111111110101110 */

  { 0, 0x0000}, /* 0x6b: */

  { 0, 0x0000}, /* 0x6c: */

  { 0, 0x0000}, /* 0x6d: */

  { 0, 0x0000}, /* 0x6e: */

  { 0, 0x0000}, /* 0x6f: */

  { 0, 0x0000}, /* 0x70: */

  { 7, 0x007a}, /* 0x71: 1111010 */

  {11, 0x07f8}, /* 0x72: 11111111000 */

  {16, 0xffaf}, /* 0x73: 1111111110101111 */

  {16, 0xffb0}, /* 0x74: 1111111110110000 */

  {16, 0xffb1}, /* 0x75: 1111111110110001 */

  {16, 0xffb2}, /* 0x76: 1111111110110010 */

  {16, 0xffb3}, /* 0x77: 1111111110110011 */

  {16, 0xffb4}, /* 0x78: 1111111110110100 */

  {16, 0xffb5}, /* 0x79: 1111111110110101 */

  {16, 0xffb6}, /* 0x7a: 1111111110110110 */

  { 0, 0x0000}, /* 0x7b: */

  { 0, 0x0000}, /* 0x7c: */

  { 0, 0x0000}, /* 0x7d: */

  { 0, 0x0000}, /* 0x7e: */

  { 0, 0x0000}, /* 0x7f: */

  { 0, 0x0000}, /* 0x80: */

  { 8, 0x00f9}, /* 0x81: 11111001 */

  {16, 0xffb7}, /* 0x82: 1111111110110111 */

  {16, 0xffb8}, /* 0x83: 1111111110111000 */

  {16, 0xffb9}, /* 0x84: 1111111110111001 */

  {16, 0xffba}, /* 0x85: 1111111110111010 */

  {16, 0xffbb}, /* 0x86: 1111111110111011 */

  {16, 0xffbc}, /* 0x87: 1111111110111100 */

  {16, 0xffbd}, /* 0x88: 1111111110111101 */

  {16, 0xffbe}, /* 0x89: 1111111110111110 */

  {16, 0xffbf}, /* 0x8a: 1111111110111111 */

  { 0, 0x0000}, /* 0x8b: */

  { 0, 0x0000}, /* 0x8c: */

  { 0, 0x0000}, /* 0x8d: */

  { 0, 0x0000}, /* 0x8e: */

  { 0, 0x0000}, /* 0x8f: */

  { 0, 0x0000}, /* 0x90: */

  { 9, 0x01f7}, /* 0x91: 111110111 */

  {16, 0xffc0}, /* 0x92: 1111111111000000 */

  {16, 0xffc1}, /* 0x93: 1111111111000001 */

  {16, 0xffc2}, /* 0x94: 1111111111000010 */

  {16, 0xffc3}, /* 0x95: 1111111111000011 */

  {16, 0xffc4}, /* 0x96: 1111111111000100 */

  {16, 0xffc5}, /* 0x97: 1111111111000101 */

  {16, 0xffc6}, /* 0x98: 1111111111000110 */

  {16, 0xffc7}, /* 0x99: 1111111111000111 */

  {16, 0xffc8}, /* 0x9a: 1111111111001000 */

  { 0, 0x0000}, /* 0x9b: */

  { 0, 0x0000}, /* 0x9c: */

  { 0, 0x0000}, /* 0x9d: */

  { 0, 0x0000}, /* 0x9e: */

  { 0, 0x0000}, /* 0x9f: */

  { 0, 0x0000}, /* 0xa0: */

  { 9, 0x01f8}, /* 0xa1: 111111000 */

  {16, 0xffc9}, /* 0xa2: 1111111111001001 */

  {16, 0xffca}, /* 0xa3: 1111111111001010 */

  {16, 0xffcb}, /* 0xa4: 1111111111001011 */

  {16, 0xffcc}, /* 0xa5: 1111111111001100 */

  {16, 0xffcd}, /* 0xa6: 1111111111001101 */

  {16, 0xffce}, /* 0xa7: 1111111111001110 */

  {16, 0xffcf}, /* 0xa8: 1111111111001111 */

  {16, 0xffd0}, /* 0xa9: 1111111111010000 */

  {16, 0xffd1}, /* 0xaa: 1111111111010001 */

  { 0, 0x0000}, /* 0xab: */

  { 0, 0x0000}, /* 0xac: */

  { 0, 0x0000}, /* 0xad: */

  { 0, 0x0000}, /* 0xae: */

  { 0, 0x0000}, /* 0xaf: */

  { 0, 0x0000}, /* 0xb0: */

  { 9, 0x01f9}, /* 0xb1: 111111001 */

  {16, 0xffd2}, /* 0xb2: 1111111111010010 */

  {16, 0xffd3}, /* 0xb3: 1111111111010011 */

  {16, 0xffd4}, /* 0xb4: 1111111111010100 */

  {16, 0xffd5}, /* 0xb5: 1111111111010101 */

  {16, 0xffd6}, /* 0xb6: 1111111111010110 */

  {16, 0xffd7}, /* 0xb7: 1111111111010111 */

  {16, 0xffd8}, /* 0xb8: 1111111111011000 */

  {16, 0xffd9}, /* 0xb9: 1111111111011001 */

  {16, 0xffda}, /* 0xba: 1111111111011010 */

  { 0, 0x0000}, /* 0xbb: */

  { 0, 0x0000}, /* 0xbc: */

  { 0, 0x0000}, /* 0xbd: */

  { 0, 0x0000}, /* 0xbe: */

  { 0, 0x0000}, /* 0xbf: */

  { 0, 0x0000}, /* 0xc0: */

  { 9, 0x01fa}, /* 0xc1: 111111010 */

  {16, 0xffdb}, /* 0xc2: 1111111111011011 */

  {16, 0xffdc}, /* 0xc3: 1111111111011100 */

  {16, 0xffdd}, /* 0xc4: 1111111111011101 */

  {16, 0xffde}, /* 0xc5: 1111111111011110 */

  {16, 0xffdf}, /* 0xc6: 1111111111011111 */

  {16, 0xffe0}, /* 0xc7: 1111111111100000 */

  {16, 0xffe1}, /* 0xc8: 1111111111100001 */

  {16, 0xffe2}, /* 0xc9: 1111111111100010 */

  {16, 0xffe3}, /* 0xca: 1111111111100011 */

  { 0, 0x0000}, /* 0xcb: */

  { 0, 0x0000}, /* 0xcc: */

  { 0, 0x0000}, /* 0xcd: */

  { 0, 0x0000}, /* 0xce: */

  { 0, 0x0000}, /* 0xcf: */

  { 0, 0x0000}, /* 0xd0: */

  {11, 0x07f9}, /* 0xd1: 11111111001 */

  {16, 0xffe4}, /* 0xd2: 1111111111100100 */

  {16, 0xffe5}, /* 0xd3: 1111111111100101 */

  {16, 0xffe6}, /* 0xd4: 1111111111100110 */

  {16, 0xffe7}, /* 0xd5: 1111111111100111 */

  {16, 0xffe8}, /* 0xd6: 1111111111101000 */

  {16, 0xffe9}, /* 0xd7: 1111111111101001 */

  {16, 0xffea}, /* 0xd8: 1111111111101010 */

  {16, 0xffeb}, /* 0xd9: 1111111111101011 */

  {16, 0xffec}, /* 0xda: 1111111111101100 */

  { 0, 0x0000}, /* 0xdb: */

  { 0, 0x0000}, /* 0xdc: */

  { 0, 0x0000}, /* 0xdd: */

  { 0, 0x0000}, /* 0xde: */

  { 0, 0x0000}, /* 0xdf: */

  { 0, 0x0000}, /* 0xe0: */

  {14, 0x3fe0}, /* 0xe1: 11111111100000 */

  {16, 0xffed}, /* 0xe2: 1111111111101101 */

  {16, 0xffee}, /* 0xe3: 1111111111101110 */

  {16, 0xffef}, /* 0xe4: 1111111111101111 */

  {16, 0xfff0}, /* 0xe5: 1111111111110000 */

  {16, 0xfff1}, /* 0xe6: 1111111111110001 */

  {16, 0xfff2}, /* 0xe7: 1111111111110010 */

  {16, 0xfff3}, /* 0xe8: 1111111111110011 */

  {16, 0xfff4}, /* 0xe9: 1111111111110100 */

  {16, 0xfff5}, /* 0xea: 1111111111110101 */

  { 0, 0x0000}, /* 0xeb: */

  { 0, 0x0000}, /* 0xec: */

  { 0, 0x0000}, /* 0xed: */

  { 0, 0x0000}, /* 0xee: */

  { 0, 0x0000}, /* 0xef: */

  {10, 0x03fa}, /* 0xf0: 1111111010 */

  {15, 0x7fc3}, /* 0xf1: 111111111000011 */

  {16, 0xfff6}, /* 0xf2: 1111111111110110 */

  {16, 0xfff7}, /* 0xf3: 1111111111110111 */

  {16, 0xfff8}, /* 0xf4: 1111111111111000 */

  {16, 0xfff9}, /* 0xf5: 1111111111111001 */

  {16, 0xfffa}, /* 0xf6: 1111111111111010 */

  {16, 0xfffb}, /* 0xf7: 1111111111111011 */

  {16, 0xfffc}, /* 0xf8: 1111111111111100 */

  {16, 0xfffd}, /* 0xf9: 1111111111111101 */

  {16, 0xfffe}, /* 0xfa: 1111111111111110 */

  { 0, 0x0000}, /* 0xfb: */

  { 0, 0x0000}, /* 0xfc: */

  { 0, 0x0000}, /* 0xfd: */

  { 0, 0x0000}, /* 0xfe: */

  { 0, 0x0000} /* 0xff: */

  };

每个人的生命都是可以绽放美丽,只要你珍惜。

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