yading@11: /* Effect: dither/noise-shape Copyright (c) 2008-9 robs@users.sourceforge.net yading@11: * yading@11: * This library is free software; you can redistribute it and/or modify it yading@11: * under the terms of the GNU Lesser General Public License as published by yading@11: * the Free Software Foundation; either version 2.1 of the License, or (at yading@11: * your option) any later version. yading@11: * yading@11: * This library is distributed in the hope that it will be useful, but yading@11: * WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser yading@11: * General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public License yading@11: * along with this library; if not, write to the Free Software Foundation, yading@11: * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: typedef struct { yading@11: int rate; yading@11: enum {fir, iir} type; yading@11: size_t len; yading@11: int gain_cB; /* Chosen so clips are few if any, but not guaranteed none. */ yading@11: double const * coefs; yading@11: enum SwrDitherType name; yading@11: } filter_t; yading@11: yading@11: static double const lip44[] = {2.033, -2.165, 1.959, -1.590, .6149}; yading@11: static double const fwe44[] = { yading@11: 2.412, -3.370, 3.937, -4.174, 3.353, -2.205, 1.281, -.569, .0847}; yading@11: static double const mew44[] = { yading@11: 1.662, -1.263, .4827, -.2913, .1268, -.1124, .03252, -.01265, -.03524}; yading@11: static double const iew44[] = { yading@11: 2.847, -4.685, 6.214, -7.184, 6.639, -5.032, 3.263, -1.632, .4191}; yading@11: static double const ges44[] = { yading@11: 2.2061, -.4706, -.2534, -.6214, 1.0587, .0676, -.6054, -.2738}; yading@11: static double const ges48[] = { yading@11: 2.2374, -.7339, -.1251, -.6033, .903, .0116, -.5853, -.2571}; yading@11: yading@11: static double const shi48[] = { yading@11: 2.8720729351043701172, -5.0413231849670410156, 6.2442994117736816406, yading@11: -5.8483986854553222656, 3.7067542076110839844, -1.0495119094848632812, yading@11: -1.1830236911773681641, 2.1126792430877685547, -1.9094531536102294922, yading@11: 0.99913084506988525391, -0.17090806365013122559, -0.32615602016448974609, yading@11: 0.39127644896507263184, -0.26876461505889892578, 0.097676105797290802002, yading@11: -0.023473845794796943665, yading@11: }; yading@11: static double const shi44[] = { yading@11: 2.6773197650909423828, -4.8308925628662109375, 6.570110321044921875, yading@11: -7.4572014808654785156, 6.7263274192810058594, -4.8481650352478027344, yading@11: 2.0412089824676513672, 0.7006359100341796875, -2.9537565708160400391, yading@11: 4.0800385475158691406, -4.1845216751098632812, 3.3311812877655029297, yading@11: -2.1179926395416259766, 0.879302978515625, -0.031759146600961685181, yading@11: -0.42382788658142089844, 0.47882103919982910156, -0.35490813851356506348, yading@11: 0.17496839165687561035, -0.060908168554306030273, yading@11: }; yading@11: static double const shi38[] = { yading@11: 1.6335992813110351562, -2.2615492343902587891, 2.4077029228210449219, yading@11: -2.6341717243194580078, 2.1440362930297851562, -1.8153258562088012695, yading@11: 1.0816224813461303711, -0.70302653312683105469, 0.15991993248462677002, yading@11: 0.041549518704414367676, -0.29416576027870178223, 0.2518316805362701416, yading@11: -0.27766478061676025391, 0.15785403549671173096, -0.10165894031524658203, yading@11: 0.016833892092108726501, yading@11: }; yading@11: static double const shi32[] = yading@11: { /* dmaker 32000: bestmax=4.99659 (inverted) */ yading@11: 0.82118552923202515, yading@11: -1.0063692331314087, yading@11: 0.62341964244842529, yading@11: -1.0447187423706055, yading@11: 0.64532512426376343, yading@11: -0.87615132331848145, yading@11: 0.52219754457473755, yading@11: -0.67434263229370117, yading@11: 0.44954317808151245, yading@11: -0.52557498216629028, yading@11: 0.34567299485206604, yading@11: -0.39618203043937683, yading@11: 0.26791760325431824, yading@11: -0.28936097025871277, yading@11: 0.1883765310049057, yading@11: -0.19097308814525604, yading@11: 0.10431359708309174, yading@11: -0.10633844882249832, yading@11: 0.046832218766212463, yading@11: -0.039653312414884567, yading@11: }; yading@11: static double const shi22[] = yading@11: { /* dmaker 22050: bestmax=5.77762 (inverted) */ yading@11: 0.056581053882837296, yading@11: -0.56956905126571655, yading@11: -0.40727734565734863, yading@11: -0.33870288729667664, yading@11: -0.29810553789138794, yading@11: -0.19039161503314972, yading@11: -0.16510021686553955, yading@11: -0.13468159735202789, yading@11: -0.096633769571781158, yading@11: -0.081049129366874695, yading@11: -0.064953058958053589, yading@11: -0.054459091275930405, yading@11: -0.043378707021474838, yading@11: -0.03660014271736145, yading@11: -0.026256965473294258, yading@11: -0.018786206841468811, yading@11: -0.013387725688517094, yading@11: -0.0090983230620622635, yading@11: -0.0026585909072309732, yading@11: -0.00042083300650119781, yading@11: }; yading@11: static double const shi16[] = yading@11: { /* dmaker 16000: bestmax=5.97128 (inverted) */ yading@11: -0.37251132726669312, yading@11: -0.81423574686050415, yading@11: -0.55010956525802612, yading@11: -0.47405767440795898, yading@11: -0.32624706625938416, yading@11: -0.3161766529083252, yading@11: -0.2286367267370224, yading@11: -0.22916607558727264, yading@11: -0.19565616548061371, yading@11: -0.18160104751586914, yading@11: -0.15423151850700378, yading@11: -0.14104481041431427, yading@11: -0.11844276636838913, yading@11: -0.097583092749118805, yading@11: -0.076493598520755768, yading@11: -0.068106919527053833, yading@11: -0.041881654411554337, yading@11: -0.036922425031661987, yading@11: -0.019364040344953537, yading@11: -0.014994367957115173, yading@11: }; yading@11: static double const shi11[] = yading@11: { /* dmaker 11025: bestmax=5.9406 (inverted) */ yading@11: -0.9264228343963623, yading@11: -0.98695987462997437, yading@11: -0.631156325340271, yading@11: -0.51966935396194458, yading@11: -0.39738872647285461, yading@11: -0.35679301619529724, yading@11: -0.29720726609230042, yading@11: -0.26310476660728455, yading@11: -0.21719355881214142, yading@11: -0.18561814725399017, yading@11: -0.15404847264289856, yading@11: -0.12687471508979797, yading@11: -0.10339745879173279, yading@11: -0.083688631653785706, yading@11: -0.05875682458281517, yading@11: -0.046893671154975891, yading@11: -0.027950936928391457, yading@11: -0.020740609616041183, yading@11: -0.009366452693939209, yading@11: -0.0060260160826146603, yading@11: }; yading@11: static double const shi08[] = yading@11: { /* dmaker 8000: bestmax=5.56234 (inverted) */ yading@11: -1.202863335609436, yading@11: -0.94103097915649414, yading@11: -0.67878556251525879, yading@11: -0.57650017738342285, yading@11: -0.50004476308822632, yading@11: -0.44349345564842224, yading@11: -0.37833768129348755, yading@11: -0.34028723835945129, yading@11: -0.29413089156150818, yading@11: -0.24994957447052002, yading@11: -0.21715600788593292, yading@11: -0.18792112171649933, yading@11: -0.15268312394618988, yading@11: -0.12135542929172516, yading@11: -0.099610626697540283, yading@11: -0.075273610651493073, yading@11: -0.048787496984004974, yading@11: -0.042586319148540497, yading@11: -0.028991291299462318, yading@11: -0.011869125068187714, yading@11: }; yading@11: static double const shl48[] = { yading@11: 2.3925774097442626953, -3.4350297451019287109, 3.1853709220886230469, yading@11: -1.8117271661758422852, -0.20124770700931549072, 1.4759907722473144531, yading@11: -1.7210904359817504883, 0.97746700048446655273, -0.13790138065814971924, yading@11: -0.38185903429985046387, 0.27421241998672485352, 0.066584214568138122559, yading@11: -0.35223302245140075684, 0.37672343850135803223, -0.23964276909828186035, yading@11: 0.068674825131893157959, yading@11: }; yading@11: static double const shl44[] = { yading@11: 2.0833916664123535156, -3.0418450832366943359, 3.2047898769378662109, yading@11: -2.7571926116943359375, 1.4978630542755126953, -0.3427594602108001709, yading@11: -0.71733748912811279297, 1.0737057924270629883, -1.0225815773010253906, yading@11: 0.56649994850158691406, -0.20968692004680633545, -0.065378531813621520996, yading@11: 0.10322438180446624756, -0.067442022264003753662, -0.00495197344571352005, yading@11: 0, yading@11: }; yading@11: static double const shh44[] = { yading@11: 3.0259189605712890625, -6.0268716812133789062, 9.195003509521484375, yading@11: -11.824929237365722656, 12.767142295837402344, -11.917946815490722656, yading@11: 9.1739168167114257812, -5.3712320327758789062, 1.1393624544143676758, yading@11: 2.4484779834747314453, -4.9719839096069335938, 6.0392003059387207031, yading@11: -5.9359521865844726562, 4.903278350830078125, -3.5527443885803222656, yading@11: 2.1909697055816650391, -1.1672389507293701172, 0.4903914332389831543, yading@11: -0.16519790887832641602, 0.023217858746647834778, yading@11: }; yading@11: yading@11: static const filter_t filters[] = { yading@11: {44100, fir, 5, 210, lip44, SWR_DITHER_NS_LIPSHITZ}, yading@11: {46000, fir, 9, 276, fwe44, SWR_DITHER_NS_F_WEIGHTED}, yading@11: {46000, fir, 9, 160, mew44, SWR_DITHER_NS_MODIFIED_E_WEIGHTED}, yading@11: {46000, fir, 9, 321, iew44, SWR_DITHER_NS_IMPROVED_E_WEIGHTED}, yading@11: // {48000, iir, 4, 220, ges48, SWR_DITHER_NS_GESEMANN}, yading@11: // {44100, iir, 4, 230, ges44, SWR_DITHER_NS_GESEMANN}, yading@11: {48000, fir, 16, 301, shi48, SWR_DITHER_NS_SHIBATA}, yading@11: {44100, fir, 20, 333, shi44, SWR_DITHER_NS_SHIBATA}, yading@11: {37800, fir, 16, 240, shi38, SWR_DITHER_NS_SHIBATA}, yading@11: {32000, fir, 20, 240/*TBD*/, shi32, SWR_DITHER_NS_SHIBATA}, yading@11: {22050, fir, 20, 240/*TBD*/, shi22, SWR_DITHER_NS_SHIBATA}, yading@11: {16000, fir, 20, 240/*TBD*/, shi16, SWR_DITHER_NS_SHIBATA}, yading@11: {11025, fir, 20, 240/*TBD*/, shi11, SWR_DITHER_NS_SHIBATA}, yading@11: { 8000, fir, 20, 240/*TBD*/, shi08, SWR_DITHER_NS_SHIBATA}, yading@11: {48000, fir, 16, 250, shl48, SWR_DITHER_NS_LOW_SHIBATA}, yading@11: {44100, fir, 15, 250, shl44, SWR_DITHER_NS_LOW_SHIBATA}, yading@11: {44100, fir, 20, 383, shh44, SWR_DITHER_NS_HIGH_SHIBATA}, yading@11: { 0, fir, 0, 0, NULL, SWR_DITHER_NONE}, yading@11: };