server/plugins/KeyTrack.cpp

   1 /*
   2         SuperCollider real time audio synthesis system
   3  Copyright (c) 2002 James McCartney. All rights reserved.
   4         http://www.audiosynth.com
   5
   6  This program is free software; you can redistribute it and/or modify
   7  it under the terms of the GNU General Public License as published by
   8  the Free Software Foundation; either version 2 of the License, or
   9  (at your option) any later version.
  10
  11  This program is distributed in the hope that it will be useful,
  12  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  GNU General Public License for more details.
  15
  16  You should have received a copy of the GNU General Public License
  17  along with this program; if not, write to the Free Software
  18  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  19  */
  20
  21 //Nick Collins 20 Feb 2006
  22 //revision of algorithm 22 Nov 2007
  23
  24 //Key tracker using weights of FFT bins.
  25
  26 #include "ML.h"
  27 #include "FFT_UGens.h"
  28
  29 //hard coded FFT size
  30 #define N 4096
  31 #define NOVER2 2048
  32
  33 //CONVERT TO m_frameperiod to cope with different sampling rates?
  34 #define FRAMEPERIOD 0.046439909297052
  35
  36 //weighting parameters
  37
  38 //4096 FFT at 44100 SR
  39 static float g_weights44100[720]= { 0.89160997732426, 0.10839002267574, 0.39160997732426, 0.10839002267574, 0.2249433106576, 0.10839002267574, 0.14160997732426, 0.10839002267574, 0.091609977324263, 0.10839002267574, 0.05827664399093, 0.10839002267574, 0.58784929938181, 0.41215070061819, 0.087849299381813, 0.41215070061819, 0.25451596604848, 0.078817367284855, 0.087849299381813, 0.16215070061819, 0.18784929938181, 0.012150700618187, 0.087849299381812, 0.078817367284855, 0.26602607158423, 0.73397392841577, 0.26602607158423, 0.23397392841577, 0.26602607158423, 0.067307261749107, 0.016026071584227, 0.23397392841577, 0.066026071584226, 0.13397392841577, 0.099359404917559, 0.067307261749107, 0.9250662388251, 0.074933761174898, 0.4250662388251, 0.074933761174898, 0.25839957215844, 0.074933761174898, 0.1750662388251, 0.074933761174898, 0.1250662388251, 0.074933761174898, 0.091732905491768, 0.074933761174898, 0.56383187935789, 0.43616812064211, 0.063831879357891, 0.43616812064211, 0.23049854602456, 0.10283478730877, 0.063831879357891, 0.18616812064211, 0.16383187935789, 0.03616812064211, 0.063831879357892, 0.10283478730877, 0.18111740708786, 0.81888259291214, 0.18111740708786, 0.31888259291214, 0.18111740708786, 0.15221592624547, 0.18111740708786, 0.068882592912141, 0.18111740708786, 0.018882592912141, 0.014450740421193, 0.15221592624547, 0.77564554804057, 0.22435445195943, 0.27564554804057, 0.22435445195943, 0.1089788813739, 0.22435445195943, 0.02564554804057, 0.22435445195943, 0.17564554804057, 0.024354451959429, 0.1089788813739, 0.057687785292764, 0.34606307757871, 0.65393692242129, 0.34606307757871, 0.15393692242129, 0.012729744245378, 0.32060358908796, 0.096063077578711, 0.15393692242129, 0.14606307757871, 0.053936922421289, 0.012729744245378, 0.15393692242129, 0.89093630414068, 0.10906369585932, 0.39093630414068, 0.10906369585932, 0.22426963747401, 0.10906369585932, 0.14093630414068, 0.10906369585932, 0.090936304140679, 0.10906369585932, 0.057602970807346, 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0.15763473456971, 0.17569859876363, 0.074301401236374, 0.17569859876363, 0.024301401236373, 0.0090319320969575, 0.15763473456971, 0.53205214316846, 0.46794785683154, 0.032052143168455, 0.46794785683154, 0.19871880983512, 0.13461452349821, 0.032052143168455, 0.21794785683154, 0.13205214316846, 0.067947856831543, 0.032052143168454, 0.13461452349821, 0.8501324776502, 0.1498675223498, 0.3501324776502, 0.1498675223498, 0.18346581098354, 0.1498675223498, 0.1001324776502, 0.1498675223498, 0.050132477650203, 0.1498675223498, 0.01679914431687, 0.1498675223498, 0.12766375871578, 0.87233624128422, 0.12766375871578, 0.37233624128422, 0.12766375871578, 0.20566957461755, 0.12766375871578, 0.12233624128422, 0.12766375871578, 0.072336241284219, 0.12766375871578, 0.039002907950883, 0.36223481417572, 0.63776518582428, 0.36223481417572, 0.13776518582428, 0.028901480842386, 0.30443185249095, 0.11223481417572, 0.13776518582428, 0.16223481417572, 0.037765185824279, 0.028901480842386, 0.13776518582428, 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0.089671231350877, 0.07699543531578, 0.25633789801755, 0.16032876864912, 0.089671231350877, 0.010328768649129, 0.18967123135087, 0.07699543531578, 0.089671231350887, 0.5370092412594, 0.4629907587406, 0.037009241259398, 0.4629907587406, 0.20367590792606, 0.12965742540727, 0.037009241259398, 0.2129907587406, 0.1370092412594, 0.062990758740602, 0.037009241259398, 0.12965742540727, 0.25498086625089, 0.74501913374911, 0.25498086625089, 0.24501913374911, 0.25498086625089, 0.078352467082444, 0.0049808662508894, 0.24501913374911, 0.054980866250889, 0.14501913374911, 0.088314199584223, 0.078352467082444, 0.53994055085221, 0.46005944914779, 0.039940550852208, 0.46005944914779, 0.20660721751887, 0.12672611581447, 0.039940550852208, 0.21005944914779, 0.1399405508522, 0.060059449147798, 0.039940550852198, 0.12672611581447, 0.36614006519321, 0.63385993480679, 0.36614006519321, 0.13385993480679, 0.032806731859864, 0.30052660147347, 0.11614006519321, 0.13385993480679, 0.16614006519319, 0.03385993480681, 0.032806731859864, 0.1338599348068, 0.70630010998138, 0.29369989001862, 0.20630010998138, 0.29369989001862, 0.039633443314737, 0.2936998900186, 0.20630010998138, 0.043699890018615, 0.10630010998138, 0.093699890018615, 0.039633443314737, 0.12703322335193 };
  40 static int g_bins44100[720]= { 5, 6, 10, 11, 15, 16, 20, 21, 25, 26, 30, 31, 5, 6, 10, 11, 16, 17, 21, 22, 27, 28, 32, 33, 5, 6, 11, 12, 17, 18, 22, 23, 28, 29, 34, 35, 6, 7, 12, 13, 18, 19, 24, 25, 30, 31, 36, 37, 6, 7, 12, 13, 19, 20, 25, 26, 32, 33, 38, 39, 6, 7, 13, 14, 20, 21, 27, 28, 34, 35, 40, 41, 7, 8, 14, 15, 21, 22, 28, 29, 36, 37, 43, 44, 7, 8, 15, 16, 22, 23, 30, 31, 38, 39, 45, 46, 8, 9, 16, 17, 24, 25, 32, 33, 40, 41, 48, 49, 8, 9, 17, 18, 25, 26, 34, 35, 42, 43, 51, 52, 9, 10, 18, 19, 27, 28, 36, 37, 45, 46, 54, 55, 9, 10, 19, 20, 28, 29, 38, 39, 48, 49, 57, 58, 10, 11, 20, 21, 30, 31, 40, 41, 51, 52, 61, 62, 10, 11, 21, 22, 32, 33, 43, 44, 54, 55, 64, 65, 11, 12, 22, 23, 34, 35, 45, 46, 57, 58, 68, 69, 12, 13, 24, 25, 36, 37, 48, 49, 60, 61, 72, 73, 12, 13, 25, 26, 38, 39, 51, 52, 64, 65, 77, 78, 13, 14, 27, 28, 40, 41, 54, 55, 68, 69, 81, 82, 14, 15, 28, 29, 43, 44, 57, 58, 72, 73, 86, 87, 15, 16, 30, 31, 45, 46, 61, 62, 76, 77, 91, 92, 16, 17, 32, 33, 48, 49, 64, 65, 81, 82, 97, 98, 17, 18, 34, 35, 51, 52, 68, 69, 85, 86, 103, 104, 18, 19, 36, 37, 54, 55, 72, 73, 91, 92, 109, 110, 19, 20, 38, 39, 57, 58, 77, 78, 96, 97, 115, 116, 20, 21, 40, 41, 61, 62, 81, 82, 102, 103, 122, 123, 21, 22, 43, 44, 64, 65, 86, 87, 108, 109, 129, 130, 22, 23, 45, 46, 68, 69, 91, 92, 114, 115, 137, 138, 24, 25, 48, 49, 72, 73, 97, 98, 121, 122, 145, 146, 25, 26, 51, 52, 77, 78, 102, 103, 128, 129, 154, 155, 27, 28, 54, 55, 81, 82, 109, 110, 136, 137, 163, 164, 28, 29, 57, 58, 86, 87, 115, 116, 144, 145, 173, 174, 30, 31, 61, 62, 91, 92, 122, 123, 153, 154, 183, 184, 32, 33, 64, 65, 97, 98, 129, 130, 162, 163, 194, 195, 34, 35, 68, 69, 103, 104, 137, 138, 171, 172, 206, 207, 36, 37, 72, 73, 109, 110, 145, 146, 182, 183, 218, 219, 38, 39, 77, 78, 115, 116, 154, 155, 192, 193, 231, 232, 40, 41, 81, 82, 122, 123, 163, 164, 204, 205, 245, 246, 43, 44, 86, 87, 129, 130, 173, 174, 216, 217, 259, 260, 45, 46, 91, 92, 137, 138, 183, 184, 229, 230, 275, 276, 48, 49, 97, 98, 145, 146, 194, 195, 242, 243, 291, 292, 51, 52, 102, 103, 154, 155, 205, 206, 257, 258, 308, 309, 54, 55, 109, 110, 163, 164, 218, 219, 272, 273, 327, 328, 57, 58, 115, 116, 173, 174, 231, 232, 288, 289, 346, 347, 61, 62, 122, 123, 183, 184, 244, 245, 306, 307, 367, 368, 64, 65, 129, 130, 194, 195, 259, 260, 324, 325, 389, 390, 68, 69, 137, 138, 206, 207, 274, 275, 343, 344, 412, 413, 72, 73, 145, 146, 218, 219, 291, 292, 364, 365, 436, 437, 77, 78, 154, 155, 231, 232, 308, 309, 385, 386, 462, 463, 81, 82, 163, 164, 245, 246, 326, 327, 408, 409, 490, 491, 86, 87, 173, 174, 259, 260, 346, 347, 432, 433, 519, 520, 91, 92, 183, 184, 275, 276, 366, 367, 458, 459, 550, 551, 97, 98, 194, 195, 291, 292, 388, 389, 485, 486, 583, 584, 102, 103, 205, 206, 308, 309, 411, 412, 514, 515, 617, 618, 109, 110, 218, 219, 327, 328, 436, 437, 545, 546, 654, 655, 115, 116, 231, 232, 346, 347, 462, 463, 577, 578, 693, 694, 122, 123, 244, 245, 367, 368, 489, 490, 612, 613, 734, 735, 129, 130, 259, 260, 389, 390, 518, 519, 648, 649, 778, 779, 137, 138, 274, 275, 412, 413, 549, 550, 687, 688, 824, 825, 145, 146, 291, 292, 436, 437, 582, 583, 728, 729, 873, 874, 154, 155, 308, 309, 462, 463, 617, 618, 771, 772, 925, 926 };
  41
  42 //4096 FFT at 48000 SR
  43 static float g_weights48000[720]= { 0.30666666666667, 0.69333333333333, 0.30666666666667, 0.19333333333333, 0.30666666666667, 0.026666666666667, 0.056666666666667, 0.19333333333333, 0.10666666666667, 0.093333333333333, 0.14, 0.026666666666667, 0.027586543807041, 0.97241345619296, 0.027586543807041, 0.47241345619296, 0.02758654380704, 0.30574678952629, 0.027586543807041, 0.22241345619296, 0.027586543807041, 0.17241345619296, 0.02758654380704, 0.13908012285963, 0.73191145326801, 0.26808854673199, 0.23191145326801, 0.26808854673199, 0.065244786601342, 0.26808854673199, 0.23191145326801, 0.018088546731992, 0.13191145326801, 0.068088546731992, 0.065244786601342, 0.10142188006533, 0.41865460692056, 0.58134539307944, 0.41865460692056, 0.081345393079437, 0.08532127358723, 0.2480120597461, 0.16865460692056, 0.081345393079437, 0.018654606920562, 0.18134539307944, 0.08532127358723, 0.081345393079437, 0.086770539160062, 0.91322946083994, 0.086770539160062, 0.41322946083994, 0.086770539160063, 0.24656279417327, 0.086770539160062, 0.16322946083994, 0.086770539160062, 0.11322946083994, 0.086770539160063, 0.079896127506604, 0.73515161776197, 0.26484838223803, 0.23515161776197, 0.26484838223803, 0.068484951095304, 0.26484838223803, 0.23515161776197, 0.014848382238029, 0.13515161776197, 0.064848382238029, 0.068484951095304, 0.098181715571363, 0.36262434726227, 0.63737565273773, 0.36262434726227, 0.13737565273773, 0.02929101392894, 0.30404231940439, 0.11262434726227, 0.13737565273773, 0.16262434726227, 0.037375652737727, 0.02929101392894, 0.13737565273773, 0.96794545252544, 0.032054547474559, 0.46794545252544, 0.032054547474559, 0.30127878585877, 0.03205454747456, 0.21794545252544, 0.032054547474559, 0.16794545252544, 0.03205454747456, 0.13461211919211, 0.03205454747456, 0.54979772942925, 0.45020227057075, 0.049797729429249, 0.45020227057075, 0.21646439609592, 0.11686893723742, 0.049797729429249, 0.20020227057075, 0.14979772942925, 0.05020227057075, 0.049797729429249, 0.11686893723742, 0.10678564881847, 0.89321435118153, 0.10678564881847, 0.39321435118153, 0.10678564881847, 0.22654768451487, 0.10678564881847, 0.14321435118153, 0.10678564881847, 0.093214351181534, 0.10678564881847, 0.059881017848201, 0.63743069905602, 0.36256930094398, 0.13743069905602, 0.36256930094398, 0.30409736572268, 0.029235967610653, 0.13743069905602, 0.11256930094398, 0.037430699056014, 0.16256930094399, 0.13743069905601, 0.029235967610653, 0.14016645162784, 0.85983354837216, 0.14016645162784, 0.35983354837216, 0.14016645162784, 0.1931668817055, 0.14016645162784, 0.10983354837216, 0.14016645162784, 0.059833548372163, 0.14016645162784, 0.02650021503883, 0.61333333333333, 0.38666666666667, 0.11333333333333, 0.38666666666667, 0.28, 0.053333333333333, 0.11333333333333, 0.13666666666667, 0.013333333333334, 0.18666666666667, 0.11333333333333, 0.053333333333333, 0.055173087614081, 0.94482691238592, 0.055173087614081, 0.44482691238592, 0.055173087614081, 0.27816024571925, 0.055173087614081, 0.19482691238592, 0.055173087614082, 0.14482691238592, 0.055173087614081, 0.11149357905259, 0.46382290653602, 0.53617709346398, 0.46382290653602, 0.036177093463982, 0.13048957320268, 0.20284376013065, 0.21382290653602, 0.036177093463982, 0.063822906536019, 0.13617709346398, 0.13048957320268, 0.036177093463982, 0.83730921384113, 0.16269078615887, 0.33730921384113, 0.16269078615887, 0.17064254717446, 0.16269078615887, 0.087309213841126, 0.16269078615887, 0.037309213841124, 0.16269078615888, 0.0039758805077928, 0.16269078615887, 0.17354107832012, 0.82645892167988, 0.17354107832012, 0.32645892167988, 0.17354107832013, 0.15979225501321, 0.17354107832012, 0.076458921679876, 0.17354107832012, 0.026458921679875, 0.0068744116534584, 0.15979225501321, 0.47030323552394, 0.52969676447606, 0.47030323552394, 0.029696764476057, 0.13696990219061, 0.19636343114272, 0.22030323552394, 0.029696764476057, 0.070303235523944, 0.12969676447606, 0.13696990219061, 0.029696764476057, 0.72524869452455, 0.27475130547545, 0.22524869452455, 0.27475130547545, 0.058582027857881, 0.27475130547545, 0.22524869452455, 0.024751305475453, 0.12524869452455, 0.074751305475453, 0.058582027857881, 0.10808463880879, 0.93589090505088, 0.064109094949119, 0.43589090505088, 0.064109094949119, 0.26922423838421, 0.06410909494912, 0.18589090505088, 0.064109094949119, 0.13589090505088, 0.06410909494912, 0.10255757171755, 0.06410909494912, 0.0995954588585, 0.9004045411415, 0.0995954588585, 0.4004045411415, 0.0995954588585, 0.23373787447483, 0.0995954588585, 0.1504045411415, 0.099595458858502, 0.1004045411415, 0.0995954588585, 0.067071207808167, 0.21357129763693, 0.78642870236307, 0.21357129763693, 0.28642870236307, 0.21357129763693, 0.1197620356964, 0.21357129763693, 0.036428702363068, 0.013571297636932, 0.18642870236307, 0.046904630970265, 0.1197620356964, 0.27486139811203, 0.72513860188797, 0.27486139811203, 0.22513860188797, 0.27486139811203, 0.058471935221306, 0.02486139811203, 0.22513860188797, 0.074861398112029, 0.12513860188797, 0.10819473144536, 0.058471935221306, 0.28033290325568, 0.71966709674432, 0.28033290325568, 0.21966709674432, 0.28033290325568, 0.053000430077657, 0.030332903255676, 0.21966709674432, 0.080332903255675, 0.11966709674433, 0.11366623658901, 0.053000430077657, 0.22666666666667, 0.77333333333333, 0.22666666666667, 0.27333333333333, 0.22666666666667, 0.10666666666667, 0.22666666666667, 0.023333333333333, 0.026666666666668, 0.17333333333333, 0.06, 0.10666666666667, 0.11034617522816, 0.88965382477184, 0.11034617522816, 0.38965382477184, 0.11034617522816, 0.22298715810517, 0.11034617522816, 0.13965382477184, 0.11034617522816, 0.089653824771835, 0.11034617522816, 0.056320491438505, 0.92764581307204, 0.072354186927964, 0.42764581307204, 0.072354186927964, 0.26097914640537, 0.072354186927965, 0.17764581307204, 0.072354186927964, 0.12764581307204, 0.072354186927961, 0.094312479738702, 0.072354186927965, 0.67461842768225, 0.32538157231775, 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0.10428519054773, 0.14571480945227, 0.054285190547728, 0.14571480945227, 0.020951857214394, 0.14571480945227, 0.09944559244812, 0.90055440755188, 0.09944559244812, 0.40055440755188, 0.09944559244813, 0.2338877408852, 0.09944559244812, 0.15055440755188, 0.099445592448126, 0.10055440755187, 0.09944559244813, 0.067221074218537, 0.1213316130227, 0.8786683869773, 0.1213316130227, 0.3786683869773, 0.1213316130227, 0.21200172031063, 0.1213316130227, 0.1286683869773, 0.1213316130227, 0.078668386977301, 0.1213316130227, 0.045335053643962, 0.90666666666667, 0.093333333333334, 0.40666666666667, 0.093333333333334, 0.24, 0.093333333333334, 0.15666666666667, 0.093333333333334, 0.10666666666667, 0.093333333333328, 0.073333333333333, 0.093333333333334, 0.44138470091265, 0.55861529908735, 0.44138470091265, 0.05861529908735, 0.10805136757931, 0.22528196575402, 0.19138470091265, 0.05861529908735, 0.041384700912658, 0.15861529908734, 0.10805136757931, 0.058615299087355, 0.71058325228817, 0.28941674771183, 0.21058325228817, 0.28941674771183, 0.043916585621503, 0.28941674771183, 0.21058325228817, 0.039416747711826, 0.11058325228817, 0.089416747711834, 0.043916585621503, 0.12275008104516, 0.698473710729, 0.301526289271, 0.198473710729, 0.301526289271, 0.031807044062343, 0.30152628927099, 0.198473710729, 0.051526289270996, 0.09847371072899, 0.10152628927101, 0.031807044062343, 0.13485962260432, 0.38832862656099, 0.61167137343901, 0.38832862656099, 0.11167137343901, 0.054995293227667, 0.27833804010567, 0.13832862656099, 0.11167137343901, 0.188328626561, 0.011671373439003, 0.054995293227667, 0.111671373439, 0.76242588419157, 0.23757411580843, 0.26242588419157, 0.23757411580843, 0.095759217524896, 0.23757411580844, 0.012425884191572, 0.23757411580843, 0.16242588419157, 0.037574115808434, 0.095759217524896, 0.070907449141771, 0.80198955619638, 0.19801044380362, 0.30198955619638, 0.19801044380362, 0.13532288952971, 0.19801044380362, 0.051989556196375, 0.19801044380362, 0.0019895561963722, 0.19801044380363, 0.13532288952971, 0.031343777136954, 0.48712724040706, 0.51287275959294, 0.48712724040706, 0.012872759592938, 0.15379390707375, 0.17953942625959, 0.23712724040706, 0.012872759592938, 0.087127240407062, 0.11287275959294, 0.15379390707375, 0.012872759592919, 0.796763670868, 0.203236329132, 0.296763670868, 0.203236329132, 0.13009700420133, 0.203236329132, 0.046763670868003, 0.203236329132, 0.19676367086802, 0.0032363291319825, 0.13009700420133, 0.036569662465335, 0.70857038109546, 0.29142961890454, 0.20857038109546, 0.29142961890454, 0.041903714428789, 0.29142961890454, 0.20857038109546, 0.041429618904544, 0.10857038109546, 0.091429618904544, 0.041903714428789, 0.12476295223788, 0.19889118489624, 0.80110881510376, 0.19889118489624, 0.30110881510376, 0.19889118489626, 0.13444214843707, 0.19889118489624, 0.05110881510376, 0.19889118489625, 0.0011088151037484, 0.032224518229593, 0.13444214843707, 0.24266322604541, 0.75733677395459, 0.24266322604541, 0.25733677395459, 0.24266322604541, 0.090670107287925, 0.24266322604541, 0.0073367739545915, 0.042663226045397, 0.1573367739546, 0.075996559378742, 0.090670107287925 };
  44 static int g_bins48000[720]= { 4, 5, 9, 10, 14, 15, 18, 19, 23, 24, 28, 29, 4, 5, 9, 10, 14, 15, 19, 20, 24, 25, 29, 30, 5, 6, 10, 11, 15, 16, 21, 22, 26, 27, 31, 32, 5, 6, 11, 12, 16, 17, 22, 23, 27, 28, 33, 34, 5, 6, 11, 12, 17, 18, 23, 24, 29, 30, 35, 36, 6, 7, 12, 13, 18, 19, 25, 26, 31, 32, 37, 38, 6, 7, 13, 14, 19, 20, 26, 27, 33, 34, 39, 40, 7, 8, 14, 15, 21, 22, 28, 29, 35, 36, 42, 43, 7, 8, 14, 15, 22, 23, 29, 30, 37, 38, 44, 45, 7, 8, 15, 16, 23, 24, 31, 32, 39, 40, 47, 48, 8, 9, 16, 17, 25, 26, 33, 34, 41, 42, 50, 51, 8, 9, 17, 18, 26, 27, 35, 36, 44, 45, 53, 54, 9, 10, 18, 19, 28, 29, 37, 38, 46, 47, 56, 57, 9, 10, 19, 20, 29, 30, 39, 40, 49, 50, 59, 60, 10, 11, 21, 22, 31, 32, 42, 43, 52, 53, 63, 64, 11, 12, 22, 23, 33, 34, 44, 45, 55, 56, 66, 67, 11, 12, 23, 24, 35, 36, 47, 48, 59, 60, 70, 71, 12, 13, 25, 26, 37, 38, 50, 51, 62, 63, 75, 76, 13, 14, 26, 27, 39, 40, 53, 54, 66, 67, 79, 80, 14, 15, 28, 29, 42, 43, 56, 57, 70, 71, 84, 85, 14, 15, 29, 30, 44, 45, 59, 60, 74, 75, 89, 90, 15, 16, 31, 32, 47, 48, 63, 64, 78, 79, 94, 95, 16, 17, 33, 34, 50, 51, 66, 67, 83, 84, 100, 101, 17, 18, 35, 36, 53, 54, 70, 71, 88, 89, 106, 107, 18, 19, 37, 38, 56, 57, 75, 76, 93, 94, 112, 113, 19, 20, 39, 40, 59, 60, 79, 80, 99, 100, 119, 120, 21, 22, 42, 43, 63, 64, 84, 85, 105, 106, 126, 127, 22, 23, 44, 45, 66, 67, 89, 90, 111, 112, 133, 134, 23, 24, 47, 48, 70, 71, 94, 95, 118, 119, 141, 142, 25, 26, 50, 51, 75, 76, 100, 101, 125, 126, 150, 151, 26, 27, 53, 54, 79, 80, 106, 107, 132, 133, 159, 160, 28, 29, 56, 57, 84, 85, 112, 113, 140, 141, 168, 169, 29, 30, 59, 60, 89, 90, 119, 120, 149, 150, 178, 179, 31, 32, 63, 64, 94, 95, 126, 127, 157, 158, 189, 190, 33, 34, 66, 67, 100, 101, 133, 134, 167, 168, 200, 201, 35, 36, 70, 71, 106, 107, 141, 142, 177, 178, 212, 213, 37, 38, 75, 76, 112, 113, 150, 151, 187, 188, 225, 226, 39, 40, 79, 80, 119, 120, 159, 160, 198, 199, 238, 239, 42, 43, 84, 85, 126, 127, 168, 169, 210, 211, 252, 253, 44, 45, 89, 90, 133, 134, 178, 179, 223, 224, 267, 268, 47, 48, 94, 95, 141, 142, 189, 190, 236, 237, 283, 284, 50, 51, 100, 101, 150, 151, 200, 201, 250, 251, 300, 301, 53, 54, 106, 107, 159, 160, 212, 213, 265, 266, 318, 319, 56, 57, 112, 113, 168, 169, 225, 226, 281, 282, 337, 338, 59, 60, 119, 120, 178, 179, 238, 239, 298, 299, 357, 358, 63, 64, 126, 127, 189, 190, 252, 253, 315, 316, 378, 379, 66, 67, 133, 134, 200, 201, 267, 268, 334, 335, 401, 402, 70, 71, 141, 142, 212, 213, 283, 284, 354, 355, 425, 426, 75, 76, 150, 151, 225, 226, 300, 301, 375, 376, 450, 451, 79, 80, 159, 160, 238, 239, 318, 319, 397, 398, 477, 478, 84, 85, 168, 169, 252, 253, 337, 338, 421, 422, 505, 506, 89, 90, 178, 179, 267, 268, 357, 358, 446, 447, 535, 536, 94, 95, 189, 190, 283, 284, 378, 379, 473, 474, 567, 568, 100, 101, 200, 201, 300, 301, 400, 401, 501, 502, 601, 602, 106, 107, 212, 213, 318, 319, 424, 425, 530, 531, 637, 638, 112, 113, 225, 226, 337, 338, 450, 451, 562, 563, 675, 676, 119, 120, 238, 239, 357, 358, 476, 477, 596, 597, 715, 716, 126, 127, 252, 253, 378, 379, 505, 506, 631, 632, 757, 758, 133, 134, 267, 268, 401, 402, 535, 536, 669, 670, 802, 803, 141, 142, 283, 284, 425, 426, 567, 568, 708, 709, 850, 851 };
  45
  46 //Krumhansl Kessler profiles (normalised)
  47 //double g_kkminor[12] = { 0.14221523253202, 0.060211188496967, 0.079083352055718, 0.12087171422152, 0.05841383958661, 0.079308020669512, 0.057065827903842, 0.10671759155246, 0.089418108290272, 0.060435857110762, 0.075039317007414, 0.071219950572905 };
  48 //double g_kkmajor[12] = { 0.15195022732711, 0.053362048336923, 0.083273510409189, 0.055754965302704, 0.10480976310122, 0.097870303900455, 0.060301507537688, 0.12419239052405, 0.057190715482173, 0.087580760947595, 0.054797798516391, 0.068916008614501 };
  49
  50 //following Izmirli; see MIREX2006
  51 static double g_diatonicmajor[12] = { 5.0, 0.0, 3.5, 0.0,  4.5, 4.0, 0.0, 4.5,  0.0, 3.5, 0.0, 4.0};
  52 static double g_diatonicminor[12] = { 5.0, 0.0, 3.5, 4.5,  0.0, 4.0, 0.0, 4.5,  3.5, 0.0, 0.0, 4.0};
  53
  54 static int g_minor[7] = {0,2,3,5,7,8,11};
  55 static int g_major[7] = {0,2,4,5,7,9,11};
  56
  57
  58 //other functions
  59 static void KeyTrack_calculatekey(KeyTrack *, uint32);
  60
  61
  62 void KeyTrack_Ctor(KeyTrack* unit)
  63 {
  64         unit->m_srate = unit->mWorld->mFullRate.mSampleRate;
  65
  66         //if sample rate is 88200 or 96000, assume taking double size FFT to start with
  67         if(unit->m_srate > (44100.0*1.5)) unit->m_srate = unit->m_srate*0.5;
  68
  69         if(((int)(unit->m_srate+0.01))==44100)
  70         {
  71                 unit->m_weights = g_weights44100;
  72                 unit->m_bins = g_bins44100;
  73                 unit->m_frameperiod = 0.046439909297052;
  74         }
  75         else  //else 48000; potentially dangerous if it isn't! Fortunately, shouldn't write any data to unknown memory
  76         {
  77                 unit->m_weights = g_weights48000;
  78                 unit->m_bins = g_bins48000;
  79                 unit->m_frameperiod = 0.042666666666667;
  80         }
  81
  82         //only need space for half!
  83         unit->m_FFTBuf = (float*)RTAlloc(unit->mWorld, NOVER2 * sizeof(float));
  84
  85         //zero chroma
  86         Clear(12, unit->m_chroma);
  87         Clear(24, unit->m_key);
  88         Clear(24, unit->m_histogram);
  89
  90         //for(j=0;j<60;++j) {
  91 //              unit->m_leaknote[j]=0.0;
  92 //      }
  93
  94 //      for(j=0;j<360;++j) {
  95 //              unit->m_prevphase[j]=0.0;
  96 //      }
  97
  98         //triggers
  99         //unit->m_triggerid=(int)ZIN0(1);
 100
 101         unit->m_currentKey=0;
 102
 103         //unit->m_frame=0;
 104
 105         unit->mCalcFunc = (UnitCalcFunc)&KeyTrack_next;
 106 }
 107
 108
 109 void KeyTrack_Dtor(KeyTrack *unit)
 110 {
 111         RTFree(unit->mWorld, unit->m_FFTBuf);
 112 }
 113
 114
 115 void KeyTrack_next(KeyTrack *unit, int wrongNumSamples)
 116 {
 117         //int numSamples = unit->mWorld->mFullRate.mBufLength;
 118
 119         //float *output = ZOUT(0);
 120
 121         float fbufnum = ZIN0(0)+0.001;
 122
 123         //next FFT bufffer ready, update
 124         //assuming at this point that buffer precalculated for any resampling
 125         if (fbufnum > -0.01f) {  // && ( ZIN0(3)<0.5)
 126
 127                 //unit->m_frame= unit->m_frame+1;
 128                 KeyTrack_calculatekey(unit, (uint32)fbufnum);
 129         }
 130
 131         //always output current best key
 132         float outval= unit->m_currentKey;
 133
 134         //control rate output
 135         ZOUT0(0)=outval;
 136 }
 137
 138
 139 //calculation function once FFT data ready
 140 void KeyTrack_calculatekey(KeyTrack *unit, uint32 ibufnum)
 141 {
 142         World *world = unit->mWorld;
 143         if (ibufnum >= world->mNumSndBufs) ibufnum = 0;
 144         SndBuf *buf = world->mSndBufs + ibufnum;
 145         LOCK_SNDBUF(buf);
 146         int numbins = buf->samples - 2 >> 1;
 147
 148         //assumed in this representation
 149         SCComplexBuf *p = ToComplexApx(buf);
 150
 151         const float * data= buf->data;
 152
 153         //memcpy(unit->m_FFTBuf, data, NOVER2);
 154
 155         //to hold powers
 156         float * fftbuf= unit->m_FFTBuf;
 157
 158         //get powers for bins
 159         //don't need to calculate past half Nyquist, because no indices involved of harmonics above 10000 Hz or so (see index data at top of file)
 160         for (int i=0; i<NOVER2; i+=2) {
 161                 //i>>1 is i/2
 162                 fftbuf[i>>1] = ((data[i] * data[i]) + (data[i+1] * data[i+1]));
 163         }
 164
 165
 166         float * chroma= unit->m_chroma;
 167
 168         float sum;
 169         int indexbase, index;
 170
 171         //experimental; added leaky integration on each note; also, only add to sum if harmonic, ie not a transient
 172
 173         float * weights = unit->m_weights;
 174         int * bins = unit->m_bins;
 175
 176         float chromaleak= ZIN0(2);
 177
 178         //zero for new round (should add leaky integrator here!
 179         for (int i=0;i<12;++i)
 180                 chroma[i] *= chromaleak;
 181
 182         for (int i=0;i<60;++i) {
 183                 int chromaindex = (i+9)%12; //starts at A1 up to G#6
 184
 185                 sum=0.0;
 186
 187                 indexbase= 12*i; //6 partials, 2 of each
 188
 189                 //transient sum, setting up last values too
 190
 191                 float phasesum=0.0;
 192
 193                 for(int j=0;j<12;++j) { //12 if 144 data points
 194
 195                         index=indexbase+j;
 196
 197                         //experimental transient detection code, not reliable
 198                         //int binindex= unit->m_bins[index]-1;
 199                         //SCPolar binnow= p->bin[binindex].ToPolarApx();
 200                         //float phaseadvance= (binindex+1)*(TWOPI*0.5); //k * (512/44100) * (44100/1024) //convert bin number to frequency
 201                         //float power= binnow.mag * binnow.mag; //(p->bin[binindex].real)*(p->bin[binindex].real) + (p->bin[binindex].imag)*(p->bin[binindex].imag); //(p->bin[binindex].mag);
 202                         //power *= power;
 203
 204                         //int phaseindex= indexbase+j;
 205                         //float phasenow= binnow.phase; //0.0; //(p->bin[binindex].phase);
 206                         //float prevphase = fmod(unit->m_prevphase[index]+phaseadvance,TWOPI);
 207                         //float a,b,tmp;
 208                         //a=phasenow; b=prevphase;
 209                         //b=phasenow; a=prevphase;
 210
 211                         //if(b<a) {b= b+TWOPI;}
 212
 213                         //float phasechange = sc_min(b-a,a+TWOPI-b); //more complicated, need mod 2pi and to know lower and upper
 214                         //phasesum+= phasechange;
 215                         //unit->m_prevphase[index]= phasenow;
 216
 217                         //((p->bin[index-1].mag) * (p->bin[index-1].mag))
 218
 219                         //printf("comparison %f %f \n",fftbuf[g_bins2[index]], power);
 220                         //sum+= (unit->m_weights[index])* power;
 221
 222                         sum+= (weights[index])* (fftbuf[bins[index]]);
 223                 }
 224
 225
 226                 //transient test here too?
 227                 //if(phasesum>(5*PI)){sum=0.0;}
 228
 229                 //if((i>5) && (i<15))
 230                 //printf("test phasesum %f \n", phasesum);
 231                 //unit->m_leaknote[i] = (0.8*unit->m_leaknote[i]) + sum;
 232
 233                 chroma[chromaindex]+= sum; //unit->m_leaknote[i]; //sum;
 234         }
 235
 236         float* key = unit->m_key;
 237
 238         //major
 239         for (int i=0;i<12;++i) {
 240
 241                 sum=0.0;
 242                 for (int j=0;j<7;++j) {
 243                         indexbase=g_major[j];
 244
 245                         index=(i+indexbase)%12;
 246                         //sum+=(chroma[index]*g_kkmajor[indexbase]);
 247
 248                         sum+=(chroma[index]*g_diatonicmajor[indexbase]);
 249
 250                 }
 251
 252                 key[i]=sum; //10*log10(sum+1);
 253         }
 254
 255         //minor
 256         for (int i=0;i<12;++i) {
 257
 258                 sum=0.0;
 259                 for (int j=0;j<7;++j) {
 260                         indexbase=g_minor[j];
 261
 262                         index=(i+indexbase)%12;
 263                         //sum+=(chroma[index]*g_kkminor[indexbase]);
 264
 265                         sum+=(chroma[index]*g_diatonicminor[indexbase]);
 266
 267                 }
 268
 269                 key[12+i]=sum;
 270         }
 271
 272         float keyleak= ZIN0(1); //fade parameter to 0.01 for histogram in seconds, convert to FFT frames
 273
 274         //keyleak in seconds, convert to drop time in FFT hop frames (FRAMEPERIOD)
 275         keyleak= sc_max(0.001f,keyleak/unit->m_frameperiod); //FRAMEPERIOD;
 276
 277         //now number of frames, actual leak param is decay exponent to reach 0.01 in x seconds, ie 0.01 = leakparam ** (x/ffthopsize)
 278         //0.01 is -40dB
 279         keyleak= pow(0.01f,(1.f/keyleak));
 280
 281         float * histogram= unit->m_histogram;
 282
 283         int bestkey=0;
 284         float bestscore=0.0;
 285
 286         for (int i=0;i<24;++i) {
 287                 histogram[i]= (keyleak*histogram[i])+key[i];
 288
 289                 if(histogram[i]>bestscore) {
 290                         bestscore=histogram[i];
 291                         bestkey=i;
 292                 }
 293
 294         //printf("%f ",histogram[i]);
 295         }
 296
 297         //should find secondbest and only swap if win by a margin
 298
 299         //printf(" best %d \n\n",bestkey);
 300         //what is winning currently? find max in histogram
 301         unit->m_currentKey=bestkey;
 302
 303         //about 5 times per second
 304         //if((unit->m_triggerid) && ((unit->m_frame%2==0))) SendTrigger(&unit->mParent->mNode, unit->m_triggerid, bestkey);
 305 }