| 1 | /**
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| 2 | * @file ac3tab.h
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| 3 | * tables taken directly from AC3 spec.
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| 4 | */
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| 5 |
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| 6 | /* possible frequencies */
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| 7 | static const uint16_t ac3_freqs[3] = { 48000, 44100, 32000 };
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| 8 |
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| 9 | /* possible bitrates */
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| 10 | static const uint16_t ac3_bitratetab[19] = {
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| 11 | 32, 40, 48, 56, 64, 80, 96, 112, 128,
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| 12 | 160, 192, 224, 256, 320, 384, 448, 512, 576, 640
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| 13 | };
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| 14 |
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| 15 | /* AC3 MDCT window */
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| 16 |
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| 17 | /* MDCT window */
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| 18 | static const int16_t ac3_window[256] = {
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| 19 | 4, 7, 12, 16, 21, 28, 34, 42,
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| 20 | 51, 61, 72, 84, 97, 111, 127, 145,
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| 21 | 164, 184, 207, 231, 257, 285, 315, 347,
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| 22 | 382, 419, 458, 500, 544, 591, 641, 694,
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| 23 | 750, 810, 872, 937, 1007, 1079, 1155, 1235,
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| 24 | 1318, 1406, 1497, 1593, 1692, 1796, 1903, 2016,
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| 25 | 2132, 2253, 2379, 2509, 2644, 2783, 2927, 3076,
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| 26 | 3230, 3389, 3552, 3721, 3894, 4072, 4255, 4444,
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| 27 | 4637, 4835, 5038, 5246, 5459, 5677, 5899, 6127,
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| 28 | 6359, 6596, 6837, 7083, 7334, 7589, 7848, 8112,
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| 29 | 8380, 8652, 8927, 9207, 9491, 9778,10069,10363,
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| 30 | 10660,10960,11264,11570,11879,12190,12504,12820,
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| 31 | 13138,13458,13780,14103,14427,14753,15079,15407,
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| 32 | 15735,16063,16392,16720,17049,17377,17705,18032,
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| 33 | 18358,18683,19007,19330,19651,19970,20287,20602,
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| 34 | 20914,21225,21532,21837,22139,22438,22733,23025,
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| 35 | 23314,23599,23880,24157,24430,24699,24964,25225,
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| 36 | 25481,25732,25979,26221,26459,26691,26919,27142,
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| 37 | 27359,27572,27780,27983,28180,28373,28560,28742,
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| 38 | 28919,29091,29258,29420,29577,29729,29876,30018,
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| 39 | 30155,30288,30415,30538,30657,30771,30880,30985,
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| 40 | 31086,31182,31274,31363,31447,31528,31605,31678,
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| 41 | 31747,31814,31877,31936,31993,32046,32097,32145,
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| 42 | 32190,32232,32272,32310,32345,32378,32409,32438,
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| 43 | 32465,32490,32513,32535,32556,32574,32592,32608,
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| 44 | 32623,32636,32649,32661,32671,32681,32690,32698,
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| 45 | 32705,32712,32718,32724,32729,32733,32737,32741,
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| 46 | 32744,32747,32750,32752,32754,32756,32757,32759,
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| 47 | 32760,32761,32762,32763,32764,32764,32765,32765,
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| 48 | 32766,32766,32766,32766,32767,32767,32767,32767,
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| 49 | 32767,32767,32767,32767,32767,32767,32767,32767,
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| 50 | 32767,32767,32767,32767,32767,32767,32767,32767,
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| 51 | };
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| 52 |
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| 53 | static uint8_t masktab[253];
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| 54 |
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| 55 | static const uint8_t latab[260]= {
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| 56 | 0x0040,0x003f,0x003e,0x003d,0x003c,0x003b,0x003a,0x0039,0x0038,0x0037,
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| 57 | 0x0036,0x0035,0x0034,0x0034,0x0033,0x0032,0x0031,0x0030,0x002f,0x002f,
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| 58 | 0x002e,0x002d,0x002c,0x002c,0x002b,0x002a,0x0029,0x0029,0x0028,0x0027,
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| 59 | 0x0026,0x0026,0x0025,0x0024,0x0024,0x0023,0x0023,0x0022,0x0021,0x0021,
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| 60 | 0x0020,0x0020,0x001f,0x001e,0x001e,0x001d,0x001d,0x001c,0x001c,0x001b,
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| 61 | 0x001b,0x001a,0x001a,0x0019,0x0019,0x0018,0x0018,0x0017,0x0017,0x0016,
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| 62 | 0x0016,0x0015,0x0015,0x0015,0x0014,0x0014,0x0013,0x0013,0x0013,0x0012,
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| 63 | 0x0012,0x0012,0x0011,0x0011,0x0011,0x0010,0x0010,0x0010,0x000f,0x000f,
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| 64 | 0x000f,0x000e,0x000e,0x000e,0x000d,0x000d,0x000d,0x000d,0x000c,0x000c,
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| 65 | 0x000c,0x000c,0x000b,0x000b,0x000b,0x000b,0x000a,0x000a,0x000a,0x000a,
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| 66 | 0x000a,0x0009,0x0009,0x0009,0x0009,0x0009,0x0008,0x0008,0x0008,0x0008,
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| 67 | 0x0008,0x0008,0x0007,0x0007,0x0007,0x0007,0x0007,0x0007,0x0006,0x0006,
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| 68 | 0x0006,0x0006,0x0006,0x0006,0x0006,0x0006,0x0005,0x0005,0x0005,0x0005,
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| 69 | 0x0005,0x0005,0x0005,0x0005,0x0004,0x0004,0x0004,0x0004,0x0004,0x0004,
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| 70 | 0x0004,0x0004,0x0004,0x0004,0x0004,0x0003,0x0003,0x0003,0x0003,0x0003,
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| 71 | 0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0002,
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| 72 | 0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,
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| 73 | 0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0001,0x0001,
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| 74 | 0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
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| 75 | 0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
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| 76 | 0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
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| 77 | 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
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| 78 | 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
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| 79 | 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
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| 80 | 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
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| 81 | 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
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| 82 | };
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| 83 |
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| 84 | static const uint16_t hth[50][3]= {
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| 85 | { 0x04d0,0x04f0,0x0580 },
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| 86 | { 0x04d0,0x04f0,0x0580 },
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| 87 | { 0x0440,0x0460,0x04b0 },
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| 88 | { 0x0400,0x0410,0x0450 },
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| 89 | { 0x03e0,0x03e0,0x0420 },
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| 90 | { 0x03c0,0x03d0,0x03f0 },
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| 91 | { 0x03b0,0x03c0,0x03e0 },
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| 92 | { 0x03b0,0x03b0,0x03d0 },
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| 93 | { 0x03a0,0x03b0,0x03c0 },
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| 94 | { 0x03a0,0x03a0,0x03b0 },
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| 95 | { 0x03a0,0x03a0,0x03b0 },
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| 96 | { 0x03a0,0x03a0,0x03b0 },
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| 97 | { 0x03a0,0x03a0,0x03a0 },
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| 98 | { 0x0390,0x03a0,0x03a0 },
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| 99 | { 0x0390,0x0390,0x03a0 },
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| 100 | { 0x0390,0x0390,0x03a0 },
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| 101 | { 0x0380,0x0390,0x03a0 },
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| 102 | { 0x0380,0x0380,0x03a0 },
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| 103 | { 0x0370,0x0380,0x03a0 },
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| 104 | { 0x0370,0x0380,0x03a0 },
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| 105 | { 0x0360,0x0370,0x0390 },
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| 106 | { 0x0360,0x0370,0x0390 },
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| 107 | { 0x0350,0x0360,0x0390 },
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| 108 | { 0x0350,0x0360,0x0390 },
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| 109 | { 0x0340,0x0350,0x0380 },
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| 110 | { 0x0340,0x0350,0x0380 },
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| 111 | { 0x0330,0x0340,0x0380 },
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| 112 | { 0x0320,0x0340,0x0370 },
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| 113 | { 0x0310,0x0320,0x0360 },
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| 114 | { 0x0300,0x0310,0x0350 },
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| 115 | { 0x02f0,0x0300,0x0340 },
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| 116 | { 0x02f0,0x02f0,0x0330 },
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| 117 | { 0x02f0,0x02f0,0x0320 },
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| 118 | { 0x02f0,0x02f0,0x0310 },
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| 119 | { 0x0300,0x02f0,0x0300 },
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| 120 | { 0x0310,0x0300,0x02f0 },
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| 121 | { 0x0340,0x0320,0x02f0 },
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| 122 | { 0x0390,0x0350,0x02f0 },
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| 123 | { 0x03e0,0x0390,0x0300 },
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| 124 | { 0x0420,0x03e0,0x0310 },
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| 125 | { 0x0460,0x0420,0x0330 },
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| 126 | { 0x0490,0x0450,0x0350 },
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| 127 | { 0x04a0,0x04a0,0x03c0 },
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| 128 | { 0x0460,0x0490,0x0410 },
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| 129 | { 0x0440,0x0460,0x0470 },
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| 130 | { 0x0440,0x0440,0x04a0 },
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| 131 | { 0x0520,0x0480,0x0460 },
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| 132 | { 0x0800,0x0630,0x0440 },
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| 133 | { 0x0840,0x0840,0x0450 },
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| 134 | { 0x0840,0x0840,0x04e0 },
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| 135 | };
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| 136 |
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| 137 | static const uint8_t baptab[64]= {
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| 138 | 0, 1, 1, 1, 1, 1, 2, 2, 3, 3,
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| 139 | 3, 4, 4, 5, 5, 6, 6, 6, 6, 7,
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| 140 | 7, 7, 7, 8, 8, 8, 8, 9, 9, 9,
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| 141 | 9, 10, 10, 10, 10, 11, 11, 11, 11, 12,
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| 142 | 12, 12, 12, 13, 13, 13, 13, 14, 14, 14,
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| 143 | 14, 14, 14, 14, 14, 15, 15, 15, 15, 15,
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| 144 | 15, 15, 15, 15,
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| 145 | };
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| 146 |
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| 147 | static const uint8_t sdecaytab[4]={
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| 148 | 0x0f, 0x11, 0x13, 0x15,
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| 149 | };
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| 150 |
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| 151 | static const uint8_t fdecaytab[4]={
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| 152 | 0x3f, 0x53, 0x67, 0x7b,
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| 153 | };
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| 154 |
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| 155 | static const uint16_t sgaintab[4]= {
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| 156 | 0x540, 0x4d8, 0x478, 0x410,
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| 157 | };
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| 158 |
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| 159 | static const uint16_t dbkneetab[4]= {
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| 160 | 0x000, 0x700, 0x900, 0xb00,
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| 161 | };
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| 162 |
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| 163 | static const uint16_t floortab[8]= {
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| 164 | 0x2f0, 0x2b0, 0x270, 0x230, 0x1f0, 0x170, 0x0f0, 0xf800,
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| 165 | };
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| 166 |
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| 167 | static const uint16_t fgaintab[8]= {
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| 168 | 0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400,
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| 169 | };
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| 170 |
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| 171 | static const uint8_t bndsz[50]={
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| 172 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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| 173 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3,
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| 174 | 3, 6, 6, 6, 6, 6, 6, 12, 12, 12, 12, 24, 24, 24, 24, 24
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| 175 | };
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| 176 |
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| 177 | static uint8_t bndtab[51];
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| 178 |
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| 179 | /* fft & mdct sin cos tables */
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| 180 | static int16_t costab[64];
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| 181 | static int16_t sintab[64];
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| 182 | static int16_t fft_rev[512];
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| 183 | static int16_t xcos1[128];
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| 184 | static int16_t xsin1[128];
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