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149 lines
4.7 KiB
149 lines
4.7 KiB
/** |
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* @file ac3tab.h |
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* tables taken directly from AC3 spec. |
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*/ |
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/* possible frequencies */ |
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static const uint16_t ac3_freqs[3] = { 48000, 44100, 32000 }; |
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/* possible bitrates */ |
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static const uint16_t ac3_bitratetab[19] = { |
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32, 40, 48, 56, 64, 80, 96, 112, 128, |
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160, 192, 224, 256, 320, 384, 448, 512, 576, 640 |
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}; |
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static uint8_t masktab[253]; |
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static const uint8_t latab[260]= { |
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0x0040,0x003f,0x003e,0x003d,0x003c,0x003b,0x003a,0x0039,0x0038,0x0037, |
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0x0036,0x0035,0x0034,0x0034,0x0033,0x0032,0x0031,0x0030,0x002f,0x002f, |
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0x002e,0x002d,0x002c,0x002c,0x002b,0x002a,0x0029,0x0029,0x0028,0x0027, |
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0x0026,0x0026,0x0025,0x0024,0x0024,0x0023,0x0023,0x0022,0x0021,0x0021, |
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0x0020,0x0020,0x001f,0x001e,0x001e,0x001d,0x001d,0x001c,0x001c,0x001b, |
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0x001b,0x001a,0x001a,0x0019,0x0019,0x0018,0x0018,0x0017,0x0017,0x0016, |
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0x0016,0x0015,0x0015,0x0015,0x0014,0x0014,0x0013,0x0013,0x0013,0x0012, |
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0x0012,0x0012,0x0011,0x0011,0x0011,0x0010,0x0010,0x0010,0x000f,0x000f, |
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0x000f,0x000e,0x000e,0x000e,0x000d,0x000d,0x000d,0x000d,0x000c,0x000c, |
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0x000c,0x000c,0x000b,0x000b,0x000b,0x000b,0x000a,0x000a,0x000a,0x000a, |
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0x000a,0x0009,0x0009,0x0009,0x0009,0x0009,0x0008,0x0008,0x0008,0x0008, |
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0x0008,0x0008,0x0007,0x0007,0x0007,0x0007,0x0007,0x0007,0x0006,0x0006, |
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0x0006,0x0006,0x0006,0x0006,0x0006,0x0006,0x0005,0x0005,0x0005,0x0005, |
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0x0005,0x0005,0x0005,0x0005,0x0004,0x0004,0x0004,0x0004,0x0004,0x0004, |
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0x0004,0x0004,0x0004,0x0004,0x0004,0x0003,0x0003,0x0003,0x0003,0x0003, |
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0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0002, |
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0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002, |
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0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0001,0x0001, |
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0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001, |
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0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001, |
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0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001, |
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0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000, |
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0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000, |
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0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000, |
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0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000, |
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0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000, |
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}; |
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static const uint16_t hth[50][3]= { |
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{ 0x04d0,0x04f0,0x0580 }, |
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{ 0x04d0,0x04f0,0x0580 }, |
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{ 0x0440,0x0460,0x04b0 }, |
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{ 0x0400,0x0410,0x0450 }, |
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{ 0x03e0,0x03e0,0x0420 }, |
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{ 0x03c0,0x03d0,0x03f0 }, |
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{ 0x03b0,0x03c0,0x03e0 }, |
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{ 0x03b0,0x03b0,0x03d0 }, |
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{ 0x03a0,0x03b0,0x03c0 }, |
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{ 0x03a0,0x03a0,0x03b0 }, |
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{ 0x03a0,0x03a0,0x03b0 }, |
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{ 0x03a0,0x03a0,0x03b0 }, |
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{ 0x03a0,0x03a0,0x03a0 }, |
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{ 0x0390,0x03a0,0x03a0 }, |
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{ 0x0390,0x0390,0x03a0 }, |
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{ 0x0390,0x0390,0x03a0 }, |
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{ 0x0380,0x0390,0x03a0 }, |
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{ 0x0380,0x0380,0x03a0 }, |
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{ 0x0370,0x0380,0x03a0 }, |
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{ 0x0370,0x0380,0x03a0 }, |
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{ 0x0360,0x0370,0x0390 }, |
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{ 0x0360,0x0370,0x0390 }, |
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{ 0x0350,0x0360,0x0390 }, |
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{ 0x0350,0x0360,0x0390 }, |
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{ 0x0340,0x0350,0x0380 }, |
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{ 0x0340,0x0350,0x0380 }, |
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{ 0x0330,0x0340,0x0380 }, |
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{ 0x0320,0x0340,0x0370 }, |
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{ 0x0310,0x0320,0x0360 }, |
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{ 0x0300,0x0310,0x0350 }, |
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{ 0x02f0,0x0300,0x0340 }, |
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{ 0x02f0,0x02f0,0x0330 }, |
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{ 0x02f0,0x02f0,0x0320 }, |
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{ 0x02f0,0x02f0,0x0310 }, |
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{ 0x0300,0x02f0,0x0300 }, |
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{ 0x0310,0x0300,0x02f0 }, |
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{ 0x0340,0x0320,0x02f0 }, |
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{ 0x0390,0x0350,0x02f0 }, |
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{ 0x03e0,0x0390,0x0300 }, |
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{ 0x0420,0x03e0,0x0310 }, |
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{ 0x0460,0x0420,0x0330 }, |
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{ 0x0490,0x0450,0x0350 }, |
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{ 0x04a0,0x04a0,0x03c0 }, |
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{ 0x0460,0x0490,0x0410 }, |
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{ 0x0440,0x0460,0x0470 }, |
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{ 0x0440,0x0440,0x04a0 }, |
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{ 0x0520,0x0480,0x0460 }, |
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{ 0x0800,0x0630,0x0440 }, |
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{ 0x0840,0x0840,0x0450 }, |
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{ 0x0840,0x0840,0x04e0 }, |
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}; |
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static const uint8_t baptab[64]= { |
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0, 1, 1, 1, 1, 1, 2, 2, 3, 3, |
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3, 4, 4, 5, 5, 6, 6, 6, 6, 7, |
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7, 7, 7, 8, 8, 8, 8, 9, 9, 9, |
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9, 10, 10, 10, 10, 11, 11, 11, 11, 12, |
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12, 12, 12, 13, 13, 13, 13, 14, 14, 14, |
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14, 14, 14, 14, 14, 15, 15, 15, 15, 15, |
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15, 15, 15, 15, |
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}; |
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static const uint8_t sdecaytab[4]={ |
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0x0f, 0x11, 0x13, 0x15, |
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}; |
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static const uint8_t fdecaytab[4]={ |
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0x3f, 0x53, 0x67, 0x7b, |
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}; |
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static const uint16_t sgaintab[4]= { |
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0x540, 0x4d8, 0x478, 0x410, |
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}; |
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static const uint16_t dbkneetab[4]= { |
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0x000, 0x700, 0x900, 0xb00, |
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}; |
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static const uint16_t floortab[8]= { |
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0x2f0, 0x2b0, 0x270, 0x230, 0x1f0, 0x170, 0x0f0, 0xf800, |
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}; |
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static const uint16_t fgaintab[8]= { |
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0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400, |
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}; |
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static const uint8_t bndsz[50]={ |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, |
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3, 6, 6, 6, 6, 6, 6, 12, 12, 12, 12, 24, 24, 24, 24, 24 |
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}; |
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static uint8_t bndtab[51]; |
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/* AC3 MDCT window */ |
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static int16_t ac3_window[256]; |
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/* fft & mdct sin cos tables */ |
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static int16_t costab[64]; |
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static int16_t sintab[64]; |
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static int16_t fft_rev[512]; |
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static int16_t xcos1[128]; |
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static int16_t xsin1[128];
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