98 lines
1.5 KiB
C
98 lines
1.5 KiB
C
uint16_t l3_bitrates[16] = {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 0};
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uint16_t l3_smprates[4] = {44100, 48000, 32000, 0};
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// TODO possiblility block_type is undefined if blocksplit not set. read spec for blocksplit_flag and block_type
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// table to get length of scalefactor bands
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uint8_t sfcom[16][2] = {
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{0,0},
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{0,1},
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{0,2},
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{0,3},
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{3,0},
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{1,1},
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{1,2},
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{1,3},
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{2,1},
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{2,2},
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{2,3},
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{3,1},
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{3,2},
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{3,3},
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{4,2},
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{4,3},
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};
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uint8_t sf[3][33] = {
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{ // 32000hz band
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4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102,
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4,4,4,4,6,8,12,16,20,26,34,42
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}, { // 44100hz band
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4,4,4,4,4,4,6,6,8,8,10,12,16,20,24,28,34,42,50,54,76,
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4,4,4,4,6,8,10,12,14,18,22,30
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}, { // 48000hz band
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4,4,4,4,4,4,6,6,6,8,10,12,16,18,22,28,34,40,46,54,54,
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4,4,4,4,6,6,10,12,14,16,20,26
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}
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};
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uint8_t preemph[21] = {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2};
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long double alias[8] = {
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-.6,
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-.535,
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-.33,
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-.185,
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-.095,
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-.041,
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-.0142,
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-.0037
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};
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// Huffman code table for quadruples (A)
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// search by value
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uint8_t hquada[16] = {
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0b10000000,
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0b01010000,
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0b01000000,
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0b00101000,
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0b01100000,
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0b00010100,
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0b00100000,
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0b00010000,
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0b01110000,
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0b00011000,
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0b00110000,
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0b00000000,
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0b00111000,
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0b00001000,
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0b00001100,
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0b00000100,
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};
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// Huffman code table for quadruples (B)
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// What The Hell
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// search by index
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uint8_t hquadb[16] = {
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15,
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14,
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13,
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12,
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11,
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10,
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9,
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8,
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7,
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6,
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5,
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4,
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3,
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2,
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1,
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0
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};
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// first ESC table is 16
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char linbits[16] = {1, 2, 3, 4, 6, 8, 10, 13, 4, 5, 6, 7, 8, 9, 11, 13};
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