1515ff8522
files. Let me know if anyone discovers any problems with this. This commit also includes Nils's synth loop optimization patch. I hope committing it does not cause problems. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15112 a1c6a512-1295-4272-9138-f99709370657
442 lines
16 KiB
C
442 lines
16 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 Stepan Moskovchenko
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "plugin.h"
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#include "midiutil.h"
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#include "guspat.h"
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#include "synth.h"
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extern struct plugin_api * rb;
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long tempo=375000;
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/* Sets the volume scaling by channel volume and note volume */
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/* This way we can do the multiplication/indexing once per */
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/* MIDI event at the most, instead of once per sample. */
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static inline void setVolScale(int a)
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{
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struct SynthObject * so = &voices[a];
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so->volscale = ((signed short int)so->vol*(signed short int)chVol[so->ch]);
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}
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static inline void setVol(int ch, int vol)
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{
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int a=0;
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chVol[ch]=vol;
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/* If channel volume changes, we need to recalculate the volume scale */
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/* factor for all voices active on this channel */
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for(a=0; a<MAX_VOICES; a++)
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if(voices[a].ch == ch)
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setVolScale(a);
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}
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static inline void setPatch(int ch, int pat)
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{
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chPat[ch]=pat;
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}
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/*
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* Pitch Bend table, Computed by
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* for i=0:127, fprintf('%d,', round(2^16*2^((i-64)/384))); end
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* (When typed into Matlab)
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* 16 bit pitch bend table
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*/
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/*
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long pitchTbl[]=
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{
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58386,58491,58597,58703,58809,58915,59022,59128,59235,59342,59449,59557,
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59664,59772,59880,59988,60097,60205,60314,60423,60532,60642,60751,60861,
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60971,61081,61191,61302,61413,61524,61635,61746,61858,61970,62081,62194,
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62306,62419,62531,62644,62757,62871,62984,63098,63212,63326,63441,63555,
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63670,63785,63901,64016,64132,64248,64364,64480,64596,64713,64830,64947,
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65065,65182,65300,65418,65536,65654,65773,65892,66011,66130,66250,66369,
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66489,66609,66730,66850,66971,67092,67213,67335,67456,67578,67700,67823,
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67945,68068,68191,68314,68438,68561,68685,68809,68933,69058,69183,69308,
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69433,69558,69684,69810,69936,70062,70189,70316,70443,70570,70698,70825,
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70953,71082,71210,71339,71468,71597,71726,71856,71985,72115,72246,72376,
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72507,72638,72769,72901,73032,73164,73297,73429
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};
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*/
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/* 512 entries here */
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/*
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for i=0:512, fprintf('%d,', round(2^16*2^((i-256)/1536))); end
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*/
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const uint32_t pitchTbl[] ICONST_ATTR={
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61858,61872,61886,61900,61914,61928,61942,61956,61970,61983,61997,62011,
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62025,62039,62053,62067,62081,62095,62109,62124,62138,62152,62166,62180,
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62194,62208,62222,62236,62250,62264,62278,62292,62306,62320,62334,62348,
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62362,62376,62390,62404,62419,62433,62447,62461,62475,62489,62503,62517,
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62531,62545,62560,62574,62588,62602,62616,62630,62644,62658,62673,62687,
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62701,62715,62729,62743,62757,62772,62786,62800,62814,62828,62843,62857,
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62871,62885,62899,62913,62928,62942,62956,62970,62984,62999,63013,63027,
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63041,63056,63070,63084,63098,63112,63127,63141,63155,63169,63184,63198,
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63212,63227,63241,63255,63269,63284,63298,63312,63326,63341,63355,63369,
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63384,63398,63412,63427,63441,63455,63470,63484,63498,63512,63527,63541,
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63555,63570,63584,63599,63613,63627,63642,63656,63670,63685,63699,63713,
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63728,63742,63757,63771,63785,63800,63814,63829,63843,63857,63872,63886,
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63901,63915,63929,63944,63958,63973,63987,64002,64016,64030,64045,64059,
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64074,64088,64103,64117,64132,64146,64161,64175,64190,64204,64219,64233,
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64248,64262,64277,64291,64306,64320,64335,64349,64364,64378,64393,64407,
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64422,64436,64451,64465,64480,64494,64509,64524,64538,64553,64567,64582,
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64596,64611,64626,64640,64655,64669,64684,64699,64713,64728,64742,64757,
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64772,64786,64801,64815,64830,64845,64859,64874,64889,64903,64918,64933,
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64947,64962,64976,64991,65006,65020,65035,65050,65065,65079,65094,65109,
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65123,65138,65153,65167,65182,65197,65211,65226,65241,65256,65270,65285,
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65300,65315,65329,65344,65359,65374,65388,65403,65418,65433,65447,65462,
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65477,65492,65506,65521,65536,65551,65566,65580,65595,65610,65625,65640,
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65654,65669,65684,65699,65714,65729,65743,65758,65773,65788,65803,65818,
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65832,65847,65862,65877,65892,65907,65922,65936,65951,65966,65981,65996,
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66011,66026,66041,66056,66071,66085,66100,66115,66130,66145,66160,66175,
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66190,66205,66220,66235,66250,66265,66280,66294,66309,66324,66339,66354,
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66369,66384,66399,66414,66429,66444,66459,66474,66489,66504,66519,66534,
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66549,66564,66579,66594,66609,66624,66639,66654,66670,66685,66700,66715,
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66730,66745,66760,66775,66790,66805,66820,66835,66850,66865,66880,66896,
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66911,66926,66941,66956,66971,66986,67001,67016,67032,67047,67062,67077,
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67092,67107,67122,67137,67153,67168,67183,67198,67213,67228,67244,67259,
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67274,67289,67304,67320,67335,67350,67365,67380,67395,67411,67426,67441,
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67456,67472,67487,67502,67517,67532,67548,67563,67578,67593,67609,67624,
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67639,67655,67670,67685,67700,67716,67731,67746,67761,67777,67792,67807,
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67823,67838,67853,67869,67884,67899,67915,67930,67945,67961,67976,67991,
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68007,68022,68037,68053,68068,68083,68099,68114,68129,68145,68160,68176,
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68191,68206,68222,68237,68252,68268,68283,68299,68314,68330,68345,68360,
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68376,68391,68407,68422,68438,68453,68468,68484,68499,68515,68530,68546,
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68561,68577,68592,68608,68623,68639,68654,68670,68685,68701,68716,68732,
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68747,68763,68778,68794,68809,68825,68840,68856,68871,68887,68902,68918,
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68933,68949,68965,68980,68996,69011,69027,69042,69058,69074,69089,69105,
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69120,69136,69152,69167,69183,69198,69214,69230,69245,69261,69276,69292,
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69308,69323,69339,69355,69370,69386,69402,69417,69433
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};
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/*
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58386,58412,58439,58465,58491,58518,58544,58571,58597,58624,58650,58676,
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58703,58729,58756,58782,58809,58836,58862,58889,58915,58942,58968,58995,
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59022,59048,59075,59102,59128,59155,59182,59208,59235,59262,59289,59315,
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59342,59369,59396,59423,59449,59476,59503,59530,59557,59584,59611,59638,
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59664,59691,59718,59745,59772,59799,59826,59853,59880,59907,59934,59961,
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59988,60015,60043,60070,60097,60124,60151,60178,60205,60233,60260,60287,
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60314,60341,60369,60396,60423,60450,60478,60505,60532,60560,60587,60614,
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60642,60669,60696,60724,60751,60779,60806,60833,60861,60888,60916,60943,
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60971,60998,61026,61054,61081,61109,61136,61164,61191,61219,61247,61274,
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61302,61330,61357,61385,61413,61440,61468,61496,61524,61551,61579,61607,
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61635,61663,61690,61718,61746,61774,61802,61830,61858,61886,61914,61942,
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61970,61997,62025,62053,62081,62109,62138,62166,62194,62222,62250,62278,
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62306,62334,62362,62390,62419,62447,62475,62503,62531,62560,62588,62616,
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62644,62673,62701,62729,62757,62786,62814,62843,62871,62899,62928,62956,
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62984,63013,63041,63070,63098,63127,63155,63184,63212,63241,63269,63298,
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63326,63355,63384,63412,63441,63470,63498,63527,63555,63584,63613,63642,
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63670,63699,63728,63757,63785,63814,63843,63872,63901,63929,63958,63987,
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64016,64045,64074,64103,64132,64161,64190,64219,64248,64277,64306,64335,
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64364,64393,64422,64451,64480,64509,64538,64567,64596,64626,64655,64684,
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64713,64742,64772,64801,64830,64859,64889,64918,64947,64976,65006,65035,
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65065,65094,65123,65153,65182,65211,65241,65270,65300,65329,65359,65388,
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65418,65447,65477,65506,65536,65566,65595,65625,65654,65684,65714,65743,
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65773,65803,65832,65862,65892,65922,65951,65981,66011,66041,66071,66100,
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66130,66160,66190,66220,66250,66280,66309,66339,66369,66399,66429,66459,
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66489,66519,66549,66579,66609,66639,66670,66700,66730,66760,66790,66820,
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66850,66880,66911,66941,66971,67001,67032,67062,67092,67122,67153,67183,
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67213,67244,67274,67304,67335,67365,67395,67426,67456,67487,67517,67548,
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67578,67609,67639,67670,67700,67731,67761,67792,67823,67853,67884,67915,
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67945,67976,68007,68037,68068,68099,68129,68160,68191,68222,68252,68283,
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68314,68345,68376,68407,68438,68468,68499,68530,68561,68592,68623,68654,
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68685,68716,68747,68778,68809,68840,68871,68902,68933,68965,68996,69027,
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69058,69089,69120,69152,69183,69214,69245,69276,69308,69339,69370,69402,
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69433,69464,69496,69527,69558,69590,69621,69653,69684,69716,69747,69778,
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69810,69841,69873,69905,69936,69968,69999,70031,70062,70094,70126,70157,
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70189,70221,70252,70284,70316,70348,70379,70411,70443,70475,70507,70538,
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70570,70602,70634,70666,70698,70730,70762,70793,70825,70857,70889,70921,
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70953,70985,71017,71049,71082,71114,71146,71178,71210,71242,71274,71306,
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71339,71371,71403,71435,71468,71500,71532,71564,71597,71629,71661,71694,
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71726,71758,71791,71823,71856,71888,71920,71953,71985,72018,72050,72083,
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72115,72148,72181,72213,72246,72278,72311,72344,72376,72409,72442,72474,
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72507,72540,72573,72605,72638,72671,72704,72736,72769,72802,72835,72868,
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72901,72934,72967,72999,73032,73065,73098,73131,73164,73197,73230,73264,
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73297,73330,73363,73396,73429,73462,73495,73528
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};*/
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static void findDelta(struct SynthObject * so, int ch, int note)
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{
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struct GWaveform * wf = patchSet[chPat[ch]]->waveforms[patchSet[chPat[ch]]->noteTable[note]];
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so->wf=wf;
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unsigned int delta= 0;
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int totalBend = (chPW[ch]-256) * chPBDepth[ch];
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int noteOffset = totalBend >> 8;
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int pitchOffset = totalBend - (noteOffset<<8);
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delta = (((gustable[note+noteOffset]<<FRACTSIZE) / (wf->rootFreq)) * wf->sampRate / (SAMPLE_RATE));
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delta = (delta * pitchTbl[pitchOffset+256])>> 16;
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so->delta = delta;
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}
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static inline void setPW(int ch, int msb, int lsb)
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{
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chPW[ch] = msb<<2|lsb>>5;
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int a=0;
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for(a = 0; a<MAX_VOICES; a++)
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{
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if(voices[a].isUsed==1 && voices[a].ch == ch)
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{
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findDelta(&voices[a], ch, voices[a].note);
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}
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}
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}
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inline void pressNote(int ch, int note, int vol)
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{
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static int lastKill = 0;
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/* Silences all channels but one, for easy debugging, for me. */
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/*
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if(ch == 0) return;
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if(ch == 1) return;
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if(ch == 2) return;
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if(ch == 3) return;
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if(ch == 4) return;
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if(ch == 5) return;
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if(ch == 6) return;
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if(ch == 7) return;
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if(ch == 8) return;
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if(ch == 9) return;
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if(ch == 10) return;
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if(ch == 11) return;
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if(ch == 12) return;
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if(ch == 13) return;
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if(ch == 14) return;
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if(ch == 15) return;
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*/
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int a=0;
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for(a=0; a<MAX_VOICES; a++)
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{
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if(voices[a].ch == ch && voices[a].note == note)
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break;
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if(voices[a].isUsed==0)
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break;
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}
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if(a==MAX_VOICES)
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{
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// printf("\nVoice kill");
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// printf("\nToo many voices playing at once. No more left");
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// printf("\nVOICE DUMP: ");
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// for(a=0; a<48; a++)
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// printf("\n#%d Ch=%d Note=%d curRate=%d curOffset=%d curPoint=%d targetOffset=%d", a, voices[a].ch, voices[a].note, voices[a].curRate, voices[a].curOffset, voices[a].curPoint, voices[a].targetOffset);
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lastKill++;
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if(lastKill == MAX_VOICES)
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lastKill = 0;
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a = lastKill;
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// return; /* None available */
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}
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voices[a].ch=ch;
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voices[a].note=note;
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voices[a].vol=vol;
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voices[a].cp=0;
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voices[a].state=STATE_ATTACK;
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voices[a].decay=255;
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setVolScale(a);
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voices[a].loopState=STATE_NONLOOPING;
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voices[a].loopDir = LOOPDIR_FORWARD;
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/*
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* OKAY. Gt = Gus Table value
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* rf = Root Frequency of wave
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* SR = sound sampling rate
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* sr = WAVE sampling rate
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*/
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if(ch!=9)
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{
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findDelta(&voices[a], ch, note);
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/* Turn it on */
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voices[a].isUsed=1;
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setPoint(&voices[a], 0);
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} else
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{
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if(drumSet[note]!=NULL)
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{
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if(note<35)
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printf("NOTE LESS THAN 35, AND A DRUM PATCH EXISTS FOR THIS? WHAT THE HELL?");
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struct GWaveform * wf = drumSet[note]->waveforms[0];
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voices[a].wf=wf;
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voices[a].delta = (((gustable[note]<<10) / wf->rootFreq) * wf->sampRate / SAMPLE_RATE);
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if(wf->mode & 28)
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// printf("\nWoah, a drum patch has a loop. Stripping the loop...");
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wf->mode = wf->mode & (255-28);
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/* Turn it on */
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voices[a].isUsed=1;
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setPoint(&voices[a], 0);
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} else
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{
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/* printf("\nWarning: drum %d does not have a patch defined... Ignoring it", note); */
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}
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}
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}
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static void releaseNote(int ch, int note)
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{
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if(ch==9)
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return;
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int a=0;
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for(a=0; a<MAX_VOICES; a++)
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{
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if(voices[a].ch == ch && voices[a].note == note)
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{
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if((voices[a].wf->mode & 28))
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{
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setPoint(&voices[a], 3);
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}
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}
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}
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}
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static void sendEvent(struct Event * ev)
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{
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const unsigned char status_low = ev->status & 0x0F;
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const unsigned char d1 = ev->d1;
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const unsigned char d2 = ev->d2;
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switch(ev->status & 0xF0)
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{
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case MIDI_CONTROL:
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switch(d1)
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{
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case CTRL_VOLUME:
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{
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setVol((status_low), d2);
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return;
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}
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case CTRL_PANNING:
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{
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chPan[status_low]=d2;
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return;
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}
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case CTRL_PWDEPTH:
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{
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/* TODO: Update all deltas. Is this really needed? */
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chPBDepth[status_low] = d2;
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return;
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}
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|
}
|
|
break;
|
|
|
|
case MIDI_PITCHW:
|
|
setPW((status_low), d2, d1);
|
|
return;
|
|
|
|
case MIDI_NOTE_ON:
|
|
switch(d2)
|
|
{
|
|
case 0: /* Release by vol=0 */
|
|
releaseNote(status_low, d1);
|
|
return;
|
|
|
|
default:
|
|
pressNote(status_low, d1, d2);
|
|
return;
|
|
}
|
|
|
|
case MIDI_NOTE_OFF:
|
|
releaseNote(status_low, d1);
|
|
return;
|
|
|
|
case MIDI_PRGM:
|
|
if((status_low) != 9)
|
|
setPatch(status_low, d1);
|
|
}
|
|
}
|
|
|
|
int tick(void) ICODE_ATTR;
|
|
int tick(void)
|
|
{
|
|
if(mf==NULL)
|
|
return 0;
|
|
|
|
int a=0;
|
|
int tracksAdv=0;
|
|
for(a=0; a<mf->numTracks; a++)
|
|
{
|
|
struct Track * tr = mf->tracks[a];
|
|
|
|
if(tr == NULL)
|
|
printf("NULL TRACK: %d", a);
|
|
|
|
|
|
//BIG DEBUG STATEMENT
|
|
//printf("\nTrack %2d, Event = %4d of %4d, Delta = %5d, Next = %4d", a, tr->pos, tr->numEvents, tr->delta, getEvent(tr, tr->pos)->delta);
|
|
|
|
|
|
if(tr != NULL && (tr->pos < tr->numEvents))
|
|
{
|
|
tr->delta++;
|
|
tracksAdv++;
|
|
while(getEvent(tr, tr->pos)->delta <= tr->delta)
|
|
{
|
|
struct Event * e = getEvent(tr, tr->pos);
|
|
|
|
if(e->status != 0xFF)
|
|
{
|
|
sendEvent(e);
|
|
if(((e->status&0xF0) == MIDI_PRGM))
|
|
{
|
|
/* printf("\nPatch Event, patch[%d] ==> %d", e->status&0xF, e->d1); */
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(e->d1 == 0x51)
|
|
{
|
|
tempo = (((short)e->evData[0])<<16)|(((short)e->evData[1])<<8)|(e->evData[2]);
|
|
/* printf("\nMeta-Event: Tempo Set = %d", tempo); */
|
|
bpm=mf->div*1000000/tempo;
|
|
numberOfSamples=SAMPLE_RATE/bpm;
|
|
|
|
}
|
|
}
|
|
tr->delta = 0;
|
|
tr->pos++;
|
|
if(tr->pos>=(tr->numEvents-1))
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(tracksAdv != 0)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|