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00033 #include "mjpeg.h"
00034
00035
00036 #if 0
00037
00038
00039
00040
00041 const unsigned char std_luminance_quant_tbl[64] = {
00042 16, 11, 10, 16, 24, 40, 51, 61,
00043 12, 12, 14, 19, 26, 58, 60, 55,
00044 14, 13, 16, 24, 40, 57, 69, 56,
00045 14, 17, 22, 29, 51, 87, 80, 62,
00046 18, 22, 37, 56, 68, 109, 103, 77,
00047 24, 35, 55, 64, 81, 104, 113, 92,
00048 49, 64, 78, 87, 103, 121, 120, 101,
00049 72, 92, 95, 98, 112, 100, 103, 99
00050 };
00051 const unsigned char std_chrominance_quant_tbl[64] = {
00052 17, 18, 24, 47, 99, 99, 99, 99,
00053 18, 21, 26, 66, 99, 99, 99, 99,
00054 24, 26, 56, 99, 99, 99, 99, 99,
00055 47, 66, 99, 99, 99, 99, 99, 99,
00056 99, 99, 99, 99, 99, 99, 99, 99,
00057 99, 99, 99, 99, 99, 99, 99, 99,
00058 99, 99, 99, 99, 99, 99, 99, 99,
00059 99, 99, 99, 99, 99, 99, 99, 99
00060 };
00061 #endif
00062
00063
00064
00065 const uint8_t ff_mjpeg_bits_dc_luminance[17] =
00066 { 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
00067 const uint8_t ff_mjpeg_val_dc_luminance[] =
00068 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
00069
00070 const uint8_t ff_mjpeg_bits_dc_chrominance[17] =
00071 { 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
00072 const uint8_t ff_mjpeg_val_dc_chrominance[] =
00073 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
00074
00075 const uint8_t ff_mjpeg_bits_ac_luminance[17] =
00076 { 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
00077 const uint8_t ff_mjpeg_val_ac_luminance[] =
00078 { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
00079 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
00080 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
00081 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
00082 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
00083 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
00084 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
00085 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
00086 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
00087 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
00088 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
00089 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
00090 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
00091 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
00092 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
00093 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
00094 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
00095 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
00096 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
00097 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
00098 0xf9, 0xfa
00099 };
00100
00101 const uint8_t ff_mjpeg_bits_ac_chrominance[17] =
00102 { 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
00103
00104 const uint8_t ff_mjpeg_val_ac_chrominance[] =
00105 { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
00106 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
00107 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
00108 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
00109 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
00110 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
00111 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
00112 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
00113 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
00114 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
00115 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
00116 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
00117 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
00118 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
00119 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
00120 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
00121 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
00122 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
00123 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
00124 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
00125 0xf9, 0xfa
00126 };
00127
00128
00129 void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
00130 const uint8_t *bits_table,
00131 const uint8_t *val_table)
00132 {
00133 int i, j, k,nb, code, sym;
00134
00135 code = 0;
00136 k = 0;
00137 for(i=1;i<=16;i++) {
00138 nb = bits_table[i];
00139 for(j=0;j<nb;j++) {
00140 sym = val_table[k++];
00141 huff_size[sym] = i;
00142 huff_code[sym] = code;
00143 code++;
00144 }
00145 code <<= 1;
00146 }
00147 }