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|
using System;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;
using static Ryujinx.Audio.Renderer.Parameter.VoiceInParameter;
namespace Ryujinx.Audio.Renderer.Dsp
{
public static class ResamplerHelper
{
#region "Default Quality Lookup Tables"
private static readonly short[] _normalCurveLut0 = {
6600, 19426, 6722, 3, 6479, 19424, 6845, 9, 6359, 19419, 6968, 15, 6239, 19412, 7093, 22,
6121, 19403, 7219, 28, 6004, 19391, 7345, 34, 5888, 19377, 7472, 41, 5773, 19361, 7600, 48,
5659, 19342, 7728, 55, 5546, 19321, 7857, 62, 5434, 19298, 7987, 69, 5323, 19273, 8118, 77,
5213, 19245, 8249, 84, 5104, 19215, 8381, 92, 4997, 19183, 8513, 101, 4890, 19148, 8646, 109,
4785, 19112, 8780, 118, 4681, 19073, 8914, 127, 4579, 19031, 9048, 137, 4477, 18988, 9183, 147,
4377, 18942, 9318, 157, 4277, 18895, 9454, 168, 4179, 18845, 9590, 179, 4083, 18793, 9726, 190,
3987, 18738, 9863, 202, 3893, 18682, 10000, 215, 3800, 18624, 10137, 228, 3709, 18563, 10274, 241,
3618, 18500, 10411, 255, 3529, 18436, 10549, 270, 3441, 18369, 10687, 285, 3355, 18300, 10824, 300,
3269, 18230, 10962, 317, 3186, 18157, 11100, 334, 3103, 18082, 11238, 351, 3022, 18006, 11375, 369,
2942, 17927, 11513, 388, 2863, 17847, 11650, 408, 2785, 17765, 11788, 428, 2709, 17681, 11925, 449,
2635, 17595, 12062, 471, 2561, 17507, 12198, 494, 2489, 17418, 12334, 517, 2418, 17327, 12470, 541,
2348, 17234, 12606, 566, 2280, 17140, 12741, 592, 2213, 17044, 12876, 619, 2147, 16946, 13010, 647,
2083, 16846, 13144, 675, 2020, 16745, 13277, 704, 1958, 16643, 13409, 735, 1897, 16539, 13541, 766,
1838, 16434, 13673, 798, 1780, 16327, 13803, 832, 1723, 16218, 13933, 866, 1667, 16109, 14062, 901,
1613, 15998, 14191, 937, 1560, 15885, 14318, 975, 1508, 15772, 14445, 1013, 1457, 15657, 14571, 1052,
1407, 15540, 14695, 1093, 1359, 15423, 14819, 1134, 1312, 15304, 14942, 1177, 1266, 15185, 15064, 1221,
1221, 15064, 15185, 1266, 1177, 14942, 15304, 1312, 1134, 14819, 15423, 1359, 1093, 14695, 15540, 1407,
1052, 14571, 15657, 1457, 1013, 14445, 15772, 1508, 975, 14318, 15885, 1560, 937, 14191, 15998, 1613,
901, 14062, 16109, 1667, 866, 13933, 16218, 1723, 832, 13803, 16327, 1780, 798, 13673, 16434, 1838,
766, 13541, 16539, 1897, 735, 13409, 16643, 1958, 704, 13277, 16745, 2020, 675, 13144, 16846, 2083,
647, 13010, 16946, 2147, 619, 12876, 17044, 2213, 592, 12741, 17140, 2280, 566, 12606, 17234, 2348,
541, 12470, 17327, 2418, 517, 12334, 17418, 2489, 494, 12198, 17507, 2561, 471, 12062, 17595, 2635,
449, 11925, 17681, 2709, 428, 11788, 17765, 2785, 408, 11650, 17847, 2863, 388, 11513, 17927, 2942,
369, 11375, 18006, 3022, 351, 11238, 18082, 3103, 334, 11100, 18157, 3186, 317, 10962, 18230, 3269,
300, 10824, 18300, 3355, 285, 10687, 18369, 3441, 270, 10549, 18436, 3529, 255, 10411, 18500, 3618,
241, 10274, 18563, 3709, 228, 10137, 18624, 3800, 215, 10000, 18682, 3893, 202, 9863, 18738, 3987,
190, 9726, 18793, 4083, 179, 9590, 18845, 4179, 168, 9454, 18895, 4277, 157, 9318, 18942, 4377,
147, 9183, 18988, 4477, 137, 9048, 19031, 4579, 127, 8914, 19073, 4681, 118, 8780, 19112, 4785,
109, 8646, 19148, 4890, 101, 8513, 19183, 4997, 92, 8381, 19215, 5104, 84, 8249, 19245, 5213,
77, 8118, 19273, 5323, 69, 7987, 19298, 5434, 62, 7857, 19321, 5546, 55, 7728, 19342, 5659,
48, 7600, 19361, 5773, 41, 7472, 19377, 5888, 34, 7345, 19391, 6004, 28, 7219, 19403, 6121,
22, 7093, 19412, 6239, 15, 6968, 19419, 6359, 9, 6845, 19424, 6479, 3, 6722, 19426, 6600,
};
private static readonly short[] _normalCurveLut1 = {
-68, 32639, 69, -5, -200, 32630, 212, -15, -328, 32613, 359, -26, -450, 32586, 512, -36,
-568, 32551, 669, -47, -680, 32507, 832, -58, -788, 32454, 1000, -69, -891, 32393, 1174, -80,
-990, 32323, 1352, -92, -1084, 32244, 1536, -103, -1173, 32157, 1724, -115, -1258, 32061, 1919, -128,
-1338, 31956, 2118, -140, -1414, 31844, 2322, -153, -1486, 31723, 2532, -167, -1554, 31593, 2747, -180,
-1617, 31456, 2967, -194, -1676, 31310, 3192, -209, -1732, 31157, 3422, -224, -1783, 30995, 3657, -240,
-1830, 30826, 3897, -256, -1874, 30649, 4143, -272, -1914, 30464, 4393, -289, -1951, 30272, 4648, -307,
-1984, 30072, 4908, -325, -2014, 29866, 5172, -343, -2040, 29652, 5442, -362, -2063, 29431, 5716, -382,
-2083, 29203, 5994, -403, -2100, 28968, 6277, -424, -2114, 28727, 6565, -445, -2125, 28480, 6857, -468,
-2133, 28226, 7153, -490, -2139, 27966, 7453, -514, -2142, 27700, 7758, -538, -2142, 27428, 8066, -563,
-2141, 27151, 8378, -588, -2136, 26867, 8694, -614, -2130, 26579, 9013, -641, -2121, 26285, 9336, -668,
-2111, 25987, 9663, -696, -2098, 25683, 9993, -724, -2084, 25375, 10326, -753, -2067, 25063, 10662, -783,
-2049, 24746, 11000, -813, -2030, 24425, 11342, -844, -2009, 24100, 11686, -875, -1986, 23771, 12033, -907,
-1962, 23438, 12382, -939, -1937, 23103, 12733, -972, -1911, 22764, 13086, -1005, -1883, 22422, 13441, -1039,
-1855, 22077, 13798, -1072, -1825, 21729, 14156, -1107, -1795, 21380, 14516, -1141, -1764, 21027, 14877, -1176,
-1732, 20673, 15239, -1211, -1700, 20317, 15602, -1246, -1667, 19959, 15965, -1282, -1633, 19600, 16329, -1317,
-1599, 19239, 16694, -1353, -1564, 18878, 17058, -1388, -1530, 18515, 17423, -1424, -1495, 18151, 17787, -1459,
-1459, 17787, 18151, -1495, -1424, 17423, 18515, -1530, -1388, 17058, 18878, -1564, -1353, 16694, 19239, -1599,
-1317, 16329, 19600, -1633, -1282, 15965, 19959, -1667, -1246, 15602, 20317, -1700, -1211, 15239, 20673, -1732,
-1176, 14877, 21027, -1764, -1141, 14516, 21380, -1795, -1107, 14156, 21729, -1825, -1072, 13798, 22077, -1855,
-1039, 13441, 22422, -1883, -1005, 13086, 22764, -1911, -972, 12733, 23103, -1937, -939, 12382, 23438, -1962,
-907, 12033, 23771, -1986, -875, 11686, 24100, -2009, -844, 11342, 24425, -2030, -813, 11000, 24746, -2049,
-783, 10662, 25063, -2067, -753, 10326, 25375, -2084, -724, 9993, 25683, -2098, -696, 9663, 25987, -2111,
-668, 9336, 26285, -2121, -641, 9013, 26579, -2130, -614, 8694, 26867, -2136, -588, 8378, 27151, -2141,
-563, 8066, 27428, -2142, -538, 7758, 27700, -2142, -514, 7453, 27966, -2139, -490, 7153, 28226, -2133,
-468, 6857, 28480, -2125, -445, 6565, 28727, -2114, -424, 6277, 28968, -2100, -403, 5994, 29203, -2083,
-382, 5716, 29431, -2063, -362, 5442, 29652, -2040, -343, 5172, 29866, -2014, -325, 4908, 30072, -1984,
-307, 4648, 30272, -1951, -289, 4393, 30464, -1914, -272, 4143, 30649, -1874, -256, 3897, 30826, -1830,
-240, 3657, 30995, -1783, -224, 3422, 31157, -1732, -209, 3192, 31310, -1676, -194, 2967, 31456, -1617,
-180, 2747, 31593, -1554, -167, 2532, 31723, -1486, -153, 2322, 31844, -1414, -140, 2118, 31956, -1338,
-128, 1919, 32061, -1258, -115, 1724, 32157, -1173, -103, 1536, 32244, -1084, -92, 1352, 32323, -990,
-80, 1174, 32393, -891, -69, 1000, 32454, -788, -58, 832, 32507, -680, -47, 669, 32551, -568,
-36, 512, 32586, -450, -26, 359, 32613, -328, -15, 212, 32630, -200, -5, 69, 32639, -68,
};
private static readonly short[] _normalCurveLut2 = {
3195, 26287, 3329, -32, 3064, 26281, 3467, -34, 2936, 26270, 3608, -38, 2811, 26253, 3751, -42,
2688, 26230, 3897, -46, 2568, 26202, 4046, -50, 2451, 26169, 4199, -54, 2338, 26130, 4354, -58,
2227, 26085, 4512, -63, 2120, 26035, 4673, -67, 2015, 25980, 4837, -72, 1912, 25919, 5004, -76,
1813, 25852, 5174, -81, 1716, 25780, 5347, -87, 1622, 25704, 5522, -92, 1531, 25621, 5701, -98,
1442, 25533, 5882, -103, 1357, 25440, 6066, -109, 1274, 25342, 6253, -115, 1193, 25239, 6442, -121,
1115, 25131, 6635, -127, 1040, 25018, 6830, -133, 967, 24899, 7027, -140, 897, 24776, 7227, -146,
829, 24648, 7430, -153, 764, 24516, 7635, -159, 701, 24379, 7842, -166, 641, 24237, 8052, -174,
583, 24091, 8264, -181, 526, 23940, 8478, -187, 472, 23785, 8695, -194, 420, 23626, 8914, -202,
371, 23462, 9135, -209, 324, 23295, 9358, -215, 279, 23123, 9583, -222, 236, 22948, 9809, -230,
194, 22769, 10038, -237, 154, 22586, 10269, -243, 117, 22399, 10501, -250, 81, 22208, 10735, -258,
47, 22015, 10970, -265, 15, 21818, 11206, -271, -16, 21618, 11444, -277, -44, 21415, 11684, -283,
-71, 21208, 11924, -290, -97, 20999, 12166, -296, -121, 20786, 12409, -302, -143, 20571, 12653, -306,
-163, 20354, 12898, -311, -183, 20134, 13143, -316, -201, 19911, 13389, -321, -218, 19686, 13635, -325,
-234, 19459, 13882, -328, -248, 19230, 14130, -332, -261, 18998, 14377, -335, -273, 18765, 14625, -337,
-284, 18531, 14873, -339, -294, 18295, 15121, -341, -302, 18057, 15369, -341, -310, 17817, 15617, -341,
-317, 17577, 15864, -340, -323, 17335, 16111, -340, -328, 17092, 16357, -338, -332, 16848, 16603, -336,
-336, 16603, 16848, -332, -338, 16357, 17092, -328, -340, 16111, 17335, -323, -340, 15864, 17577, -317,
-341, 15617, 17817, -310, -341, 15369, 18057, -302, -341, 15121, 18295, -294, -339, 14873, 18531, -284,
-337, 14625, 18765, -273, -335, 14377, 18998, -261, -332, 14130, 19230, -248, -328, 13882, 19459, -234,
-325, 13635, 19686, -218, -321, 13389, 19911, -201, -316, 13143, 20134, -183, -311, 12898, 20354, -163,
-306, 12653, 20571, -143, -302, 12409, 20786, -121, -296, 12166, 20999, -97, -290, 11924, 21208, -71,
-283, 11684, 21415, -44, -277, 11444, 21618, -16, -271, 11206, 21818, 15, -265, 10970, 22015, 47,
-258, 10735, 22208, 81, -250, 10501, 22399, 117, -243, 10269, 22586, 154, -237, 10038, 22769, 194,
-230, 9809, 22948, 236, -222, 9583, 23123, 279, -215, 9358, 23295, 324, -209, 9135, 23462, 371,
-202, 8914, 23626, 420, -194, 8695, 23785, 472, -187, 8478, 23940, 526, -181, 8264, 24091, 583,
-174, 8052, 24237, 641, -166, 7842, 24379, 701, -159, 7635, 24516, 764, -153, 7430, 24648, 829,
-146, 7227, 24776, 897, -140, 7027, 24899, 967, -133, 6830, 25018, 1040, -127, 6635, 25131, 1115,
-121, 6442, 25239, 1193, -115, 6253, 25342, 1274, -109, 6066, 25440, 1357, -103, 5882, 25533, 1442,
-98, 5701, 25621, 1531, -92, 5522, 25704, 1622, -87, 5347, 25780, 1716, -81, 5174, 25852, 1813,
-76, 5004, 25919, 1912, -72, 4837, 25980, 2015, -67, 4673, 26035, 2120, -63, 4512, 26085, 2227,
-58, 4354, 26130, 2338, -54, 4199, 26169, 2451, -50, 4046, 26202, 2568, -46, 3897, 26230, 2688,
-42, 3751, 26253, 2811, -38, 3608, 26270, 2936, -34, 3467, 26281, 3064, -32, 3329, 26287, 3195,
};
#endregion
#region "High Quality Lookup Tables"
private static readonly short[] _highCurveLut0 = {
-582, -23, 8740, 16386, 8833, 8, -590, 0, -573, -54, 8647, 16385, 8925, 40, -598, -1,
-565, -84, 8555, 16383, 9018, 72, -606, -1, -557, -113, 8462, 16379, 9110, 105, -614, -2,
-549, -142, 8370, 16375, 9203, 139, -622, -2, -541, -170, 8277, 16369, 9295, 173, -630, -3,
-533, -198, 8185, 16362, 9387, 208, -638, -4, -525, -225, 8093, 16354, 9480, 244, -646, -5,
-516, -251, 8000, 16344, 9572, 280, -654, -5, -508, -277, 7908, 16334, 9664, 317, -662, -6,
-500, -302, 7816, 16322, 9756, 355, -670, -7, -492, -327, 7724, 16310, 9847, 393, -678, -8,
-484, -351, 7632, 16296, 9939, 432, -686, -9, -476, -374, 7540, 16281, 10030, 471, -694, -10,
-468, -397, 7449, 16265, 10121, 511, -702, -11, -460, -419, 7357, 16247, 10212, 552, -709, -13,
-452, -441, 7266, 16229, 10303, 593, -717, -14, -445, -462, 7175, 16209, 10394, 635, -724, -15,
-437, -483, 7084, 16189, 10484, 678, -732, -16, -429, -503, 6994, 16167, 10574, 722, -739, -18,
-421, -523, 6903, 16144, 10664, 766, -747, -19, -414, -542, 6813, 16120, 10754, 810, -754, -21,
-406, -560, 6723, 16095, 10843, 856, -761, -22, -398, -578, 6633, 16068, 10932, 902, -768, -24,
-391, -596, 6544, 16041, 11021, 949, -775, -26, -383, -612, 6454, 16012, 11109, 996, -782, -27,
-376, -629, 6366, 15983, 11197, 1044, -789, -29, -368, -645, 6277, 15952, 11285, 1093, -796, -31,
-361, -660, 6189, 15920, 11372, 1142, -802, -33, -354, -675, 6100, 15887, 11459, 1192, -809, -35,
-347, -689, 6013, 15853, 11546, 1243, -815, -37, -339, -703, 5925, 15818, 11632, 1294, -821, -39,
-332, -717, 5838, 15782, 11718, 1346, -827, -41, -325, -730, 5751, 15745, 11803, 1399, -833, -43,
-318, -742, 5665, 15707, 11888, 1452, -839, -46, -312, -754, 5579, 15668, 11973, 1506, -845, -48,
-305, -766, 5493, 15627, 12057, 1561, -850, -50, -298, -777, 5408, 15586, 12140, 1616, -855, -53,
-291, -787, 5323, 15544, 12224, 1672, -861, -56, -285, -798, 5239, 15500, 12306, 1729, -866, -58,
-278, -807, 5155, 15456, 12388, 1786, -871, -61, -272, -817, 5071, 15410, 12470, 1844, -875, -64,
-265, -826, 4988, 15364, 12551, 1902, -880, -67, -259, -834, 4905, 15317, 12631, 1962, -884, -70,
-253, -842, 4823, 15268, 12711, 2022, -888, -73, -247, -850, 4741, 15219, 12790, 2082, -892, -76,
-241, -857, 4659, 15168, 12869, 2143, -896, -79, -235, -864, 4578, 15117, 12947, 2205, -899, -82,
-229, -870, 4498, 15065, 13025, 2267, -903, -85, -223, -876, 4417, 15012, 13102, 2331, -906, -89,
-217, -882, 4338, 14958, 13178, 2394, -909, -92, -211, -887, 4259, 14903, 13254, 2459, -911, -96,
-206, -892, 4180, 14847, 13329, 2523, -914, -100, -200, -896, 4102, 14790, 13403, 2589, -916, -103,
-195, -900, 4024, 14732, 13477, 2655, -918, -107, -190, -904, 3947, 14673, 13550, 2722, -919, -111,
-184, -908, 3871, 14614, 13622, 2789, -921, -115, -179, -911, 3795, 14553, 13693, 2857, -922, -119,
-174, -913, 3719, 14492, 13764, 2926, -923, -123, -169, -916, 3644, 14430, 13834, 2995, -923, -127,
-164, -918, 3570, 14367, 13904, 3065, -924, -132, -159, -920, 3496, 14303, 13972, 3136, -924, -136,
-154, -921, 3423, 14239, 14040, 3207, -924, -140, -150, -922, 3350, 14173, 14107, 3278, -923, -145,
-145, -923, 3278, 14107, 14173, 3350, -922, -150, -140, -924, 3207, 14040, 14239, 3423, -921, -154,
-136, -924, 3136, 13972, 14303, 3496, -920, -159, -132, -924, 3065, 13904, 14367, 3570, -918, -164,
-127, -923, 2995, 13834, 14430, 3644, -916, -169, -123, -923, 2926, 13764, 14492, 3719, -913, -174,
-119, -922, 2857, 13693, 14553, 3795, -911, -179, -115, -921, 2789, 13622, 14614, 3871, -908, -184,
-111, -919, 2722, 13550, 14673, 3947, -904, -190, -107, -918, 2655, 13477, 14732, 4024, -900, -195,
-103, -916, 2589, 13403, 14790, 4102, -896, -200, -100, -914, 2523, 13329, 14847, 4180, -892, -206,
-96, -911, 2459, 13254, 14903, 4259, -887, -211, -92, -909, 2394, 13178, 14958, 4338, -882, -217,
-89, -906, 2331, 13102, 15012, 4417, -876, -223, -85, -903, 2267, 13025, 15065, 4498, -870, -229,
-82, -899, 2205, 12947, 15117, 4578, -864, -235, -79, -896, 2143, 12869, 15168, 4659, -857, -241,
-76, -892, 2082, 12790, 15219, 4741, -850, -247, -73, -888, 2022, 12711, 15268, 4823, -842, -253,
-70, -884, 1962, 12631, 15317, 4905, -834, -259, -67, -880, 1902, 12551, 15364, 4988, -826, -265,
-64, -875, 1844, 12470, 15410, 5071, -817, -272, -61, -871, 1786, 12388, 15456, 5155, -807, -278,
-58, -866, 1729, 12306, 15500, 5239, -798, -285, -56, -861, 1672, 12224, 15544, 5323, -787, -291,
-53, -855, 1616, 12140, 15586, 5408, -777, -298, -50, -850, 1561, 12057, 15627, 5493, -766, -305,
-48, -845, 1506, 11973, 15668, 5579, -754, -312, -46, -839, 1452, 11888, 15707, 5665, -742, -318,
-43, -833, 1399, 11803, 15745, 5751, -730, -325, -41, -827, 1346, 11718, 15782, 5838, -717, -332,
-39, -821, 1294, 11632, 15818, 5925, -703, -339, -37, -815, 1243, 11546, 15853, 6013, -689, -347,
-35, -809, 1192, 11459, 15887, 6100, -675, -354, -33, -802, 1142, 11372, 15920, 6189, -660, -361,
-31, -796, 1093, 11285, 15952, 6277, -645, -368, -29, -789, 1044, 11197, 15983, 6366, -629, -376,
-27, -782, 996, 11109, 16012, 6454, -612, -383, -26, -775, 949, 11021, 16041, 6544, -596, -391,
-24, -768, 902, 10932, 16068, 6633, -578, -398, -22, -761, 856, 10843, 16095, 6723, -560, -406,
-21, -754, 810, 10754, 16120, 6813, -542, -414, -19, -747, 766, 10664, 16144, 6903, -523, -421,
-18, -739, 722, 10574, 16167, 6994, -503, -429, -16, -732, 678, 10484, 16189, 7084, -483, -437,
-15, -724, 635, 10394, 16209, 7175, -462, -445, -14, -717, 593, 10303, 16229, 7266, -441, -452,
-13, -709, 552, 10212, 16247, 7357, -419, -460, -11, -702, 511, 10121, 16265, 7449, -397, -468,
-10, -694, 471, 10030, 16281, 7540, -374, -476, -9, -686, 432, 9939, 16296, 7632, -351, -484,
-8, -678, 393, 9847, 16310, 7724, -327, -492, -7, -670, 355, 9756, 16322, 7816, -302, -500,
-6, -662, 317, 9664, 16334, 7908, -277, -508, -5, -654, 280, 9572, 16344, 8000, -251, -516,
-5, -646, 244, 9480, 16354, 8093, -225, -525, -4, -638, 208, 9387, 16362, 8185, -198, -533,
-3, -630, 173, 9295, 16369, 8277, -170, -541, -2, -622, 139, 9203, 16375, 8370, -142, -549,
-2, -614, 105, 9110, 16379, 8462, -113, -557, -1, -606, 72, 9018, 16383, 8555, -84, -565,
-1, -598, 40, 8925, 16385, 8647, -54, -573, 0, -590, 8, 8833, 16386, 8740, -23, -582,
};
private static readonly short[] _highCurveLut1 = {
-12, 47, -134, 32767, 81, -16, 2, 0, -26, 108, -345, 32760, 301, -79, 17, -1,
-40, 168, -552, 32745, 526, -144, 32, -2, -53, 226, -753, 32723, 755, -210, 47, -3,
-66, 284, -950, 32694, 989, -277, 63, -5, -78, 340, -1143, 32658, 1226, -346, 79, -6,
-90, 394, -1331, 32615, 1469, -415, 96, -8, -101, 447, -1514, 32564, 1715, -486, 113, -9,
-112, 499, -1692, 32506, 1966, -557, 130, -11, -123, 550, -1865, 32441, 2221, -630, 148, -13,
-133, 599, -2034, 32369, 2480, -703, 166, -14, -143, 646, -2198, 32290, 2743, -778, 185, -16,
-152, 693, -2357, 32204, 3010, -853, 204, -18, -162, 738, -2512, 32110, 3281, -929, 223, -20,
-170, 781, -2662, 32010, 3555, -1007, 242, -23, -178, 823, -2807, 31903, 3834, -1084, 262, -25,
-186, 864, -2947, 31789, 4116, -1163, 282, -27, -194, 903, -3082, 31668, 4403, -1242, 303, -30,
-201, 940, -3213, 31540, 4692, -1322, 323, -32, -207, 977, -3339, 31406, 4985, -1403, 344, -35,
-214, 1011, -3460, 31265, 5282, -1484, 365, -37, -220, 1045, -3577, 31117, 5582, -1566, 387, -40,
-225, 1077, -3688, 30963, 5885, -1648, 409, -43, -230, 1107, -3796, 30802, 6191, -1730, 431, -46,
-235, 1136, -3898, 30635, 6501, -1813, 453, -49, -240, 1164, -3996, 30462, 6813, -1896, 475, -52,
-244, 1190, -4089, 30282, 7128, -1980, 498, -55, -247, 1215, -4178, 30097, 7446, -2064, 520, -58,
-251, 1239, -4262, 29905, 7767, -2148, 543, -62, -254, 1261, -4342, 29707, 8091, -2231, 566, -65,
-257, 1281, -4417, 29503, 8416, -2315, 589, -69, -259, 1301, -4488, 29293, 8745, -2399, 613, -72,
-261, 1319, -4555, 29078, 9075, -2483, 636, -76, -263, 1336, -4617, 28857, 9408, -2567, 659, -80,
-265, 1351, -4674, 28631, 9743, -2651, 683, -83, -266, 1365, -4728, 28399, 10080, -2734, 706, -87,
-267, 1378, -4777, 28161, 10418, -2817, 730, -91, -267, 1389, -4822, 27919, 10759, -2899, 753, -95,
-268, 1400, -4863, 27671, 11100, -2981, 777, -99, -268, 1409, -4900, 27418, 11444, -3063, 800, -103,
-268, 1416, -4933, 27161, 11789, -3144, 824, -107, -267, 1423, -4962, 26898, 12135, -3224, 847, -112,
-267, 1428, -4987, 26631, 12482, -3303, 870, -116, -266, 1433, -5008, 26359, 12830, -3382, 893, -120,
-265, 1436, -5026, 26083, 13179, -3460, 916, -125, -264, 1438, -5039, 25802, 13529, -3537, 939, -129,
-262, 1438, -5049, 25517, 13880, -3613, 962, -133, -260, 1438, -5055, 25228, 14231, -3687, 984, -138,
-258, 1437, -5058, 24935, 14582, -3761, 1006, -142, -256, 1435, -5058, 24639, 14934, -3833, 1028, -147,
-254, 1431, -5053, 24338, 15286, -3904, 1049, -151, -252, 1427, -5046, 24034, 15638, -3974, 1071, -155,
-249, 1422, -5035, 23726, 15989, -4042, 1091, -160, -246, 1416, -5021, 23415, 16341, -4109, 1112, -164,
-243, 1408, -5004, 23101, 16691, -4174, 1132, -169, -240, 1400, -4984, 22783, 17042, -4237, 1152, -173,
-237, 1392, -4960, 22463, 17392, -4299, 1171, -178, -234, 1382, -4934, 22140, 17740, -4358, 1190, -182,
-230, 1371, -4905, 21814, 18088, -4416, 1209, -186, -227, 1360, -4873, 21485, 18435, -4472, 1226, -191,
-223, 1348, -4839, 21154, 18781, -4526, 1244, -195, -219, 1335, -4801, 20821, 19125, -4578, 1260, -199,
-215, 1321, -4761, 20486, 19468, -4627, 1277, -203, -211, 1307, -4719, 20148, 19809, -4674, 1292, -207,
-207, 1292, -4674, 19809, 20148, -4719, 1307, -211, -203, 1277, -4627, 19468, 20486, -4761, 1321, -215,
-199, 1260, -4578, 19125, 20821, -4801, 1335, -219, -195, 1244, -4526, 18781, 21154, -4839, 1348, -223,
-191, 1226, -4472, 18435, 21485, -4873, 1360, -227, -186, 1209, -4416, 18088, 21814, -4905, 1371, -230,
-182, 1190, -4358, 17740, 22140, -4934, 1382, -234, -178, 1171, -4299, 17392, 22463, -4960, 1392, -237,
-173, 1152, -4237, 17042, 22783, -4984, 1400, -240, -169, 1132, -4174, 16691, 23101, -5004, 1408, -243,
-164, 1112, -4109, 16341, 23415, -5021, 1416, -246, -160, 1091, -4042, 15989, 23726, -5035, 1422, -249,
-155, 1071, -3974, 15638, 24034, -5046, 1427, -252, -151, 1049, -3904, 15286, 24338, -5053, 1431, -254,
-147, 1028, -3833, 14934, 24639, -5058, 1435, -256, -142, 1006, -3761, 14582, 24935, -5058, 1437, -258,
-138, 984, -3687, 14231, 25228, -5055, 1438, -260, -133, 962, -3613, 13880, 25517, -5049, 1438, -262,
-129, 939, -3537, 13529, 25802, -5039, 1438, -264, -125, 916, -3460, 13179, 26083, -5026, 1436, -265,
-120, 893, -3382, 12830, 26359, -5008, 1433, -266, -116, 870, -3303, 12482, 26631, -4987, 1428, -267,
-112, 847, -3224, 12135, 26898, -4962, 1423, -267, -107, 824, -3144, 11789, 27161, -4933, 1416, -268,
-103, 800, -3063, 11444, 27418, -4900, 1409, -268, -99, 777, -2981, 11100, 27671, -4863, 1400, -268,
-95, 753, -2899, 10759, 27919, -4822, 1389, -267, -91, 730, -2817, 10418, 28161, -4777, 1378, -267,
-87, 706, -2734, 10080, 28399, -4728, 1365, -266, -83, 683, -2651, 9743, 28631, -4674, 1351, -265,
-80, 659, -2567, 9408, 28857, -4617, 1336, -263, -76, 636, -2483, 9075, 29078, -4555, 1319, -261,
-72, 613, -2399, 8745, 29293, -4488, 1301, -259, -69, 589, -2315, 8416, 29503, -4417, 1281, -257,
-65, 566, -2231, 8091, 29707, -4342, 1261, -254, -62, 543, -2148, 7767, 29905, -4262, 1239, -251,
-58, 520, -2064, 7446, 30097, -4178, 1215, -247, -55, 498, -1980, 7128, 30282, -4089, 1190, -244,
-52, 475, -1896, 6813, 30462, -3996, 1164, -240, -49, 453, -1813, 6501, 30635, -3898, 1136, -235,
-46, 431, -1730, 6191, 30802, -3796, 1107, -230, -43, 409, -1648, 5885, 30963, -3688, 1077, -225,
-40, 387, -1566, 5582, 31117, -3577, 1045, -220, -37, 365, -1484, 5282, 31265, -3460, 1011, -214,
-35, 344, -1403, 4985, 31406, -3339, 977, -207, -32, 323, -1322, 4692, 31540, -3213, 940, -201,
-30, 303, -1242, 4403, 31668, -3082, 903, -194, -27, 282, -1163, 4116, 31789, -2947, 864, -186,
-25, 262, -1084, 3834, 31903, -2807, 823, -178, -23, 242, -1007, 3555, 32010, -2662, 781, -170,
-20, 223, -929, 3281, 32110, -2512, 738, -162, -18, 204, -853, 3010, 32204, -2357, 693, -152,
-16, 185, -778, 2743, 32290, -2198, 646, -143, -14, 166, -703, 2480, 32369, -2034, 599, -133,
-13, 148, -630, 2221, 32441, -1865, 550, -123, -11, 130, -557, 1966, 32506, -1692, 499, -112,
-9, 113, -486, 1715, 32564, -1514, 447, -101, -8, 96, -415, 1469, 32615, -1331, 394, -90,
-6, 79, -346, 1226, 32658, -1143, 340, -78, -5, 63, -277, 989, 32694, -950, 284, -66,
-3, 47, -210, 755, 32723, -753, 226, -53, -2, 32, -144, 526, 32745, -552, 168, -40,
-1, 17, -79, 301, 32760, -345, 108, -26, 0, 2, -16, 81, 32767, -134, 47, -12,
};
private static readonly short[] _highCurveLut2 = {
418, -2538, 6118, 24615, 6298, -2563, 417, 0, 420, -2512, 5939, 24611, 6479, -2588, 415, 1,
421, -2485, 5761, 24605, 6662, -2612, 412, 2, 422, -2458, 5585, 24595, 6846, -2635, 409, 3,
423, -2430, 5410, 24582, 7030, -2658, 406, 4, 423, -2402, 5236, 24565, 7216, -2680, 403, 5,
423, -2373, 5064, 24546, 7403, -2701, 399, 6, 423, -2343, 4893, 24523, 7591, -2721, 395, 7,
423, -2313, 4724, 24496, 7780, -2741, 391, 8, 422, -2283, 4556, 24467, 7970, -2759, 386, 9,
421, -2252, 4390, 24434, 8161, -2777, 381, 11, 420, -2221, 4225, 24398, 8353, -2794, 376, 12,
419, -2190, 4062, 24359, 8545, -2810, 370, 14, 418, -2158, 3900, 24316, 8739, -2825, 364, 15,
416, -2126, 3740, 24271, 8933, -2839, 358, 17, 414, -2093, 3582, 24222, 9127, -2851, 351, 19,
412, -2060, 3425, 24170, 9323, -2863, 344, 21, 410, -2027, 3270, 24115, 9519, -2874, 336, 22,
407, -1993, 3117, 24056, 9715, -2884, 328, 24, 404, -1960, 2966, 23995, 9912, -2893, 319, 26,
402, -1926, 2816, 23930, 10110, -2900, 311, 29, 398, -1892, 2668, 23863, 10308, -2907, 301, 31,
395, -1858, 2522, 23792, 10506, -2912, 292, 33, 392, -1823, 2378, 23718, 10705, -2916, 282, 35,
389, -1789, 2235, 23641, 10904, -2919, 271, 38, 385, -1754, 2095, 23561, 11103, -2920, 261, 40,
381, -1719, 1956, 23478, 11303, -2921, 249, 43, 377, -1684, 1819, 23393, 11502, -2920, 238, 45,
373, -1649, 1684, 23304, 11702, -2917, 225, 48, 369, -1615, 1551, 23212, 11902, -2914, 213, 51,
365, -1580, 1420, 23118, 12102, -2909, 200, 54, 361, -1545, 1291, 23020, 12302, -2902, 186, 57,
356, -1510, 1163, 22920, 12502, -2895, 173, 60, 352, -1475, 1038, 22817, 12702, -2885, 158, 63,
347, -1440, 915, 22711, 12901, -2875, 143, 66, 342, -1405, 793, 22602, 13101, -2863, 128, 69,
338, -1370, 674, 22491, 13300, -2849, 113, 73, 333, -1335, 557, 22377, 13499, -2834, 97, 76,
328, -1301, 441, 22260, 13698, -2817, 80, 80, 323, -1266, 328, 22141, 13896, -2799, 63, 83,
318, -1232, 217, 22019, 14094, -2779, 46, 87, 313, -1197, 107, 21894, 14291, -2758, 28, 91,
307, -1163, 0, 21767, 14488, -2735, 9, 95, 302, -1129, -105, 21637, 14684, -2710, -9, 98,
297, -1096, -208, 21506, 14879, -2684, -29, 102, 292, -1062, -310, 21371, 15074, -2656, -48, 106,
286, -1029, -409, 21234, 15268, -2626, -69, 111, 281, -996, -506, 21095, 15461, -2595, -89, 115,
276, -963, -601, 20954, 15654, -2562, -110, 119, 270, -930, -694, 20810, 15846, -2527, -132, 123,
265, -898, -785, 20664, 16036, -2490, -154, 128, 260, -866, -874, 20516, 16226, -2452, -176, 132,
254, -834, -961, 20366, 16415, -2411, -199, 137, 249, -803, -1046, 20213, 16602, -2369, -222, 141,
243, -771, -1129, 20059, 16789, -2326, -246, 146, 238, -740, -1209, 19902, 16974, -2280, -270, 151,
233, -710, -1288, 19744, 17158, -2232, -294, 156, 227, -680, -1365, 19583, 17341, -2183, -319, 160,
222, -650, -1440, 19421, 17523, -2132, -345, 165, 217, -620, -1513, 19257, 17703, -2079, -370, 170,
211, -591, -1583, 19091, 17882, -2023, -396, 175, 206, -562, -1652, 18923, 18059, -1966, -423, 180,
201, -533, -1719, 18754, 18235, -1907, -450, 185, 196, -505, -1784, 18582, 18410, -1847, -477, 191,
191, -477, -1847, 18410, 18582, -1784, -505, 196, 185, -450, -1907, 18235, 18754, -1719, -533, 201,
180, -423, -1966, 18059, 18923, -1652, -562, 206, 175, -396, -2023, 17882, 19091, -1583, -591, 211,
170, -370, -2079, 17703, 19257, -1513, -620, 217, 165, -345, -2132, 17523, 19421, -1440, -650, 222,
160, -319, -2183, 17341, 19583, -1365, -680, 227, 156, -294, -2232, 17158, 19744, -1288, -710, 233,
151, -270, -2280, 16974, 19902, -1209, -740, 238, 146, -246, -2326, 16789, 20059, -1129, -771, 243,
141, -222, -2369, 16602, 20213, -1046, -803, 249, 137, -199, -2411, 16415, 20366, -961, -834, 254,
132, -176, -2452, 16226, 20516, -874, -866, 260, 128, -154, -2490, 16036, 20664, -785, -898, 265,
123, -132, -2527, 15846, 20810, -694, -930, 270, 119, -110, -2562, 15654, 20954, -601, -963, 276,
115, -89, -2595, 15461, 21095, -506, -996, 281, 111, -69, -2626, 15268, 21234, -409, -1029, 286,
106, -48, -2656, 15074, 21371, -310, -1062, 292, 102, -29, -2684, 14879, 21506, -208, -1096, 297,
98, -9, -2710, 14684, 21637, -105, -1129, 302, 95, 9, -2735, 14488, 21767, 0, -1163, 307,
91, 28, -2758, 14291, 21894, 107, -1197, 313, 87, 46, -2779, 14094, 22019, 217, -1232, 318,
83, 63, -2799, 13896, 22141, 328, -1266, 323, 80, 80, -2817, 13698, 22260, 441, -1301, 328,
76, 97, -2834, 13499, 22377, 557, -1335, 333, 73, 113, -2849, 13300, 22491, 674, -1370, 338,
69, 128, -2863, 13101, 22602, 793, -1405, 342, 66, 143, -2875, 12901, 22711, 915, -1440, 347,
63, 158, -2885, 12702, 22817, 1038, -1475, 352, 60, 173, -2895, 12502, 22920, 1163, -1510, 356,
57, 186, -2902, 12302, 23020, 1291, -1545, 361, 54, 200, -2909, 12102, 23118, 1420, -1580, 365,
51, 213, -2914, 11902, 23212, 1551, -1615, 369, 48, 225, -2917, 11702, 23304, 1684, -1649, 373,
45, 238, -2920, 11502, 23393, 1819, -1684, 377, 43, 249, -2921, 11303, 23478, 1956, -1719, 381,
40, 261, -2920, 11103, 23561, 2095, -1754, 385, 38, 271, -2919, 10904, 23641, 2235, -1789, 389,
35, 282, -2916, 10705, 23718, 2378, -1823, 392, 33, 292, -2912, 10506, 23792, 2522, -1858, 395,
31, 301, -2907, 10308, 23863, 2668, -1892, 398, 29, 311, -2900, 10110, 23930, 2816, -1926, 402,
26, 319, -2893, 9912, 23995, 2966, -1960, 404, 24, 328, -2884, 9715, 24056, 3117, -1993, 407,
22, 336, -2874, 9519, 24115, 3270, -2027, 410, 21, 344, -2863, 9323, 24170, 3425, -2060, 412,
19, 351, -2851, 9127, 24222, 3582, -2093, 414, 17, 358, -2839, 8933, 24271, 3740, -2126, 416,
15, 364, -2825, 8739, 24316, 3900, -2158, 418, 14, 370, -2810, 8545, 24359, 4062, -2190, 419,
12, 376, -2794, 8353, 24398, 4225, -2221, 420, 11, 381, -2777, 8161, 24434, 4390, -2252, 421,
9, 386, -2759, 7970, 24467, 4556, -2283, 422, 8, 391, -2741, 7780, 24496, 4724, -2313, 423,
7, 395, -2721, 7591, 24523, 4893, -2343, 423, 6, 399, -2701, 7403, 24546, 5064, -2373, 423,
5, 403, -2680, 7216, 24565, 5236, -2402, 423, 4, 406, -2658, 7030, 24582, 5410, -2430, 423,
3, 409, -2635, 6846, 24595, 5585, -2458, 422, 2, 412, -2612, 6662, 24605, 5761, -2485, 421,
1, 415, -2588, 6479, 24611, 5939, -2512, 420, 0, 417, -2563, 6298, 24615, 6118, -2538, 418,
};
#endregion
private static readonly float[] _normalCurveLut0F;
private static readonly float[] _normalCurveLut1F;
private static readonly float[] _normalCurveLut2F;
private static readonly float[] _highCurveLut0F;
private static readonly float[] _highCurveLut1F;
private static readonly float[] _highCurveLut2F;
static ResamplerHelper()
{
_normalCurveLut0F = _normalCurveLut0.Select(x => x / 32768f).ToArray();
_normalCurveLut1F = _normalCurveLut1.Select(x => x / 32768f).ToArray();
_normalCurveLut2F = _normalCurveLut2.Select(x => x / 32768f).ToArray();
_highCurveLut0F = _highCurveLut0.Select(x => x / 32768f).ToArray();
_highCurveLut1F = _highCurveLut1.Select(x => x / 32768f).ToArray();
_highCurveLut2F = _highCurveLut2.Select(x => x / 32768f).ToArray();
}
private const int FixedPointPrecision = 15;
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void Resample(Span<float> outputBuffer, ReadOnlySpan<short> inputBuffer, float ratio, ref float fraction, int sampleCount, SampleRateConversionQuality srcQuality, bool needPitch)
{
switch (srcQuality)
{
case SampleRateConversionQuality.Default:
ResampleDefaultQuality(outputBuffer, inputBuffer, ratio, ref fraction, sampleCount, needPitch);
break;
case SampleRateConversionQuality.Low:
ResampleLowQuality(outputBuffer, inputBuffer, ratio, ref fraction, sampleCount);
break;
case SampleRateConversionQuality.High:
ResampleHighQuality(outputBuffer, inputBuffer, ratio, ref fraction, sampleCount);
break;
default:
throw new NotImplementedException($"{srcQuality}");
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static ReadOnlySpan<float> GetDefaultParameter(float ratio)
{
if (ratio <= 1.0f)
{
return _normalCurveLut1F;
}
if (ratio > 1.333313f)
{
return _normalCurveLut0F;
}
return _normalCurveLut2F;
}
private unsafe static void ResampleDefaultQuality(Span<float> outputBuffer, ReadOnlySpan<short> inputBuffer, float ratio, ref float fraction, int sampleCount, bool needPitch)
{
ReadOnlySpan<float> parameters = GetDefaultParameter(ratio);
int inputBufferIndex = 0, i = 0;
// TODO: REV8 fast path (when needPitch == false the input index progression is constant + we need SIMD)
if (Sse41.IsSupported)
{
if (ratio == 1f)
{
fixed (short* pInput = inputBuffer)
fixed (float* pOutput = outputBuffer, pParameters = parameters)
{
Vector128<float> parameter = Sse.LoadVector128(pParameters);
for (; i < (sampleCount & ~3); i += 4)
{
Vector128<int> intInput0 = Sse41.ConvertToVector128Int32(pInput + (uint)i);
Vector128<int> intInput1 = Sse41.ConvertToVector128Int32(pInput + (uint)i + 1);
Vector128<int> intInput2 = Sse41.ConvertToVector128Int32(pInput + (uint)i + 2);
Vector128<int> intInput3 = Sse41.ConvertToVector128Int32(pInput + (uint)i + 3);
Vector128<float> input0 = Sse2.ConvertToVector128Single(intInput0);
Vector128<float> input1 = Sse2.ConvertToVector128Single(intInput1);
Vector128<float> input2 = Sse2.ConvertToVector128Single(intInput2);
Vector128<float> input3 = Sse2.ConvertToVector128Single(intInput3);
Vector128<float> mix0 = Sse.Multiply(input0, parameter);
Vector128<float> mix1 = Sse.Multiply(input1, parameter);
Vector128<float> mix2 = Sse.Multiply(input2, parameter);
Vector128<float> mix3 = Sse.Multiply(input3, parameter);
Vector128<float> mix01 = Sse3.HorizontalAdd(mix0, mix1);
Vector128<float> mix23 = Sse3.HorizontalAdd(mix2, mix3);
Vector128<float> mix0123 = Sse3.HorizontalAdd(mix01, mix23);
Sse.Store(pOutput + (uint)i, Sse41.RoundToNearestInteger(mix0123));
}
}
inputBufferIndex = i;
}
else
{
fixed (short* pInput = inputBuffer)
fixed (float* pOutput = outputBuffer, pParameters = parameters)
{
for (; i < (sampleCount & ~3); i += 4)
{
uint baseIndex0 = (uint)(fraction * 128) * 4;
uint inputIndex0 = (uint)inputBufferIndex;
fraction += ratio;
uint baseIndex1 = ((uint)(fraction * 128) & 127) * 4;
uint inputIndex1 = (uint)inputBufferIndex + (uint)fraction;
fraction += ratio;
uint baseIndex2 = ((uint)(fraction * 128) & 127) * 4;
uint inputIndex2 = (uint)inputBufferIndex + (uint)fraction;
fraction += ratio;
uint baseIndex3 = ((uint)(fraction * 128) & 127) * 4;
uint inputIndex3 = (uint)inputBufferIndex + (uint)fraction;
fraction += ratio;
inputBufferIndex += (int)fraction;
// Only keep lower part (safe as fraction isn't supposed to be negative)
fraction -= (int)fraction;
Vector128<float> parameter0 = Sse.LoadVector128(pParameters + baseIndex0);
Vector128<float> parameter1 = Sse.LoadVector128(pParameters + baseIndex1);
Vector128<float> parameter2 = Sse.LoadVector128(pParameters + baseIndex2);
Vector128<float> parameter3 = Sse.LoadVector128(pParameters + baseIndex3);
Vector128<int> intInput0 = Sse41.ConvertToVector128Int32(pInput + inputIndex0);
Vector128<int> intInput1 = Sse41.ConvertToVector128Int32(pInput + inputIndex1);
Vector128<int> intInput2 = Sse41.ConvertToVector128Int32(pInput + inputIndex2);
Vector128<int> intInput3 = Sse41.ConvertToVector128Int32(pInput + inputIndex3);
Vector128<float> input0 = Sse2.ConvertToVector128Single(intInput0);
Vector128<float> input1 = Sse2.ConvertToVector128Single(intInput1);
Vector128<float> input2 = Sse2.ConvertToVector128Single(intInput2);
Vector128<float> input3 = Sse2.ConvertToVector128Single(intInput3);
Vector128<float> mix0 = Sse.Multiply(input0, parameter0);
Vector128<float> mix1 = Sse.Multiply(input1, parameter1);
Vector128<float> mix2 = Sse.Multiply(input2, parameter2);
Vector128<float> mix3 = Sse.Multiply(input3, parameter3);
Vector128<float> mix01 = Sse3.HorizontalAdd(mix0, mix1);
Vector128<float> mix23 = Sse3.HorizontalAdd(mix2, mix3);
Vector128<float> mix0123 = Sse3.HorizontalAdd(mix01, mix23);
Sse.Store(pOutput + (uint)i, Sse41.RoundToNearestInteger(mix0123));
}
}
}
}
for (; i < sampleCount; i++)
{
int baseIndex = (int)(fraction * 128) * 4;
ReadOnlySpan<float> parameter = parameters.Slice(baseIndex, 4);
ReadOnlySpan<short> currentInput = inputBuffer.Slice(inputBufferIndex, 4);
outputBuffer[i] = (float)Math.Round(currentInput[0] * parameter[0] +
currentInput[1] * parameter[1] +
currentInput[2] * parameter[2] +
currentInput[3] * parameter[3]);
fraction += ratio;
inputBufferIndex += (int)fraction;
// Only keep lower part (safe as fraction isn't supposed to be negative)
fraction -= (int)fraction;
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static ReadOnlySpan<float> GetHighParameter(float ratio)
{
if (ratio <= 1.0f)
{
return _highCurveLut1F;
}
if (ratio > 1.333313f)
{
return _highCurveLut0F;
}
return _highCurveLut2F;
}
private static unsafe void ResampleHighQuality(Span<float> outputBuffer, ReadOnlySpan<short> inputBuffer, float ratio, ref float fraction, int sampleCount)
{
ReadOnlySpan<float> parameters = GetHighParameter(ratio);
int inputBufferIndex = 0;
if (Avx2.IsSupported)
{
// Fast path; assumes 256-bit vectors for simplicity because the filter is 8 taps
fixed (short* pInput = inputBuffer)
fixed (float* pParameters = parameters)
{
for (int i = 0; i < sampleCount; i++)
{
int baseIndex = (int)(fraction * 128) * 8;
Vector256<int> intInput = Avx2.ConvertToVector256Int32(pInput + inputBufferIndex);
Vector256<float> floatInput = Avx.ConvertToVector256Single(intInput);
Vector256<float> parameter = Avx.LoadVector256(pParameters + baseIndex);
Vector256<float> dp = Avx.DotProduct(floatInput, parameter, control: 0xFF);
// avx2 does an 8-element dot product piecewise so we have to sum up 2 intermediate results
outputBuffer[i] = (float)Math.Round(dp[0] + dp[4]);
fraction += ratio;
inputBufferIndex += (int)MathF.Truncate(fraction);
fraction -= (int)fraction;
}
}
}
else
{
for (int i = 0; i < sampleCount; i++)
{
int baseIndex = (int)(fraction * 128) * 8;
ReadOnlySpan<float> parameter = parameters.Slice(baseIndex, 8);
ReadOnlySpan<short> currentInput = inputBuffer.Slice(inputBufferIndex, 8);
outputBuffer[i] = (float)Math.Round(currentInput[0] * parameter[0] +
currentInput[1] * parameter[1] +
currentInput[2] * parameter[2] +
currentInput[3] * parameter[3] +
currentInput[4] * parameter[4] +
currentInput[5] * parameter[5] +
currentInput[6] * parameter[6] +
currentInput[7] * parameter[7]);
fraction += ratio;
inputBufferIndex += (int)MathF.Truncate(fraction);
fraction -= (int)fraction;
}
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static void ResampleLowQuality(Span<float> outputBuffer, ReadOnlySpan<short> inputBuffer, float ratio, ref float fraction, int sampleCount)
{
int inputBufferIndex = 0;
for (int i = 0; i < sampleCount; i++)
{
int outputData = inputBuffer[inputBufferIndex];
if (fraction > 1.0f)
{
outputData = inputBuffer[inputBufferIndex + 1];
}
outputBuffer[i] = outputData;
fraction += ratio;
inputBufferIndex += (int)MathF.Truncate(fraction);
fraction -= (int)fraction;
}
}
}
}
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