spinal cord / PokittoLib

PokittoLib is the library needed for programming the Pokitto DIY game console (www.pokitto.com)

Dependents:   Sensitive

Fork of PokittoLib by Jonne Valola

POKITTO_LIBS/Synth/Synth_mixfuncs.cpp@15:0bbe8f6fae32, 2017-10-18 (annotated)

Committer:
spinal
Date:
Wed Oct 18 14:47:54 2017 +0000
Revision:
15:0bbe8f6fae32
Parent:
7:72f87b7c7400 
direct lcd stuff used by sensitive

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Pokitto 7:72f87b7c7400 1 /**************************************************************************/
Pokitto 7:72f87b7c7400 2 /*!
Pokitto 7:72f87b7c7400 3 @file Synth_mixfuncs.cpp
Pokitto 7:72f87b7c7400 4 @author Jonne Valola
Pokitto 7:72f87b7c7400 5
Pokitto 7:72f87b7c7400 6 @section LICENSE
Pokitto 7:72f87b7c7400 7
Pokitto 7:72f87b7c7400 8 Software License Agreement (BSD License)
Pokitto 7:72f87b7c7400 9
Pokitto 7:72f87b7c7400 10 Copyright (c) 2016, Jonne Valola
Pokitto 7:72f87b7c7400 11 All rights reserved.
Pokitto 7:72f87b7c7400 12
Pokitto 7:72f87b7c7400 13 Redistribution and use in source and binary forms, with or without
Pokitto 7:72f87b7c7400 14 modification, are permitted provided that the following conditions are met:
Pokitto 7:72f87b7c7400 15 1. Redistributions of source code must retain the above copyright
Pokitto 7:72f87b7c7400 16 notice, this list of conditions and the following disclaimer.
Pokitto 7:72f87b7c7400 17 2. Redistributions in binary form must reproduce the above copyright
Pokitto 7:72f87b7c7400 18 notice, this list of conditions and the following disclaimer in the
Pokitto 7:72f87b7c7400 19 documentation and/or other materials provided with the distribution.
Pokitto 7:72f87b7c7400 20 3. Neither the name of the copyright holders nor the
Pokitto 7:72f87b7c7400 21 names of its contributors may be used to endorse or promote products
Pokitto 7:72f87b7c7400 22 derived from this software without specific prior written permission.
Pokitto 7:72f87b7c7400 23
Pokitto 7:72f87b7c7400 24 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
Pokitto 7:72f87b7c7400 25 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
Pokitto 7:72f87b7c7400 26 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
Pokitto 7:72f87b7c7400 27 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
Pokitto 7:72f87b7c7400 28 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
Pokitto 7:72f87b7c7400 29 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
Pokitto 7:72f87b7c7400 30 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
Pokitto 7:72f87b7c7400 31 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
Pokitto 7:72f87b7c7400 32 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Pokitto 7:72f87b7c7400 33 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Pokitto 7:72f87b7c7400 34 */
Pokitto 7:72f87b7c7400 35 /**************************************************************************/
Pokitto 7:72f87b7c7400 36
Pokitto 7:72f87b7c7400 37 #include "PokittoGlobs.h"
Pokitto 7:72f87b7c7400 38 #include "Synth.h"
Pokitto 7:72f87b7c7400 39
Pokitto 7:72f87b7c7400 40 /** MIXING FUNCTIONS **/
Pokitto 7:72f87b7c7400 41
Pokitto 7:72f87b7c7400 42 char voltick=0; // i need to make volume changes even slower
Pokitto 7:72f87b7c7400 43 uint16_t arptick=0; // i need to make volume changes even slower
Pokitto 7:72f87b7c7400 44 int8_t bendtick = 0; // ditto for bend.
Pokitto 7:72f87b7c7400 45
Pokitto 7:72f87b7c7400 46
Pokitto 7:72f87b7c7400 47 void mix1(){
Pokitto 7:72f87b7c7400 48 // Track 1
Pokitto 7:72f87b7c7400 49 if (osc1.on) {
Pokitto 7:72f87b7c7400 50 Farr[osc1.wave](&osc1);
Pokitto 7:72f87b7c7400 51 #if PROJ_ARDUBOY > 0
Pokitto 7:72f87b7c7400 52 if (osc1.duration) {
Pokitto 7:72f87b7c7400 53 /**this is special for osc1 and is only used to emulate arduino Tone(); */
Pokitto 7:72f87b7c7400 54 osc1.duration--;
Pokitto 7:72f87b7c7400 55 } else osc1.on = 0;
Pokitto 7:72f87b7c7400 56 #endif
Pokitto 7:72f87b7c7400 57
Pokitto 7:72f87b7c7400 58 #ifdef POK_SIM
Pokitto 7:72f87b7c7400 59 soundbyte = (((osc1.output>>8) * (osc1.adsrvol >>8 )) >> 8) >> osc1.echodiv; // To output, shift back to 8-bit
Pokitto 7:72f87b7c7400 60 if (osc1.overdrive) soundbyte *= OVERDRIVE;
Pokitto 7:72f87b7c7400 61 if (osc1.kick ) soundbyte >>= 2;
Pokitto 7:72f87b7c7400 62 osc1.output = soundbyte;
Pokitto 7:72f87b7c7400 63 #else
Pokitto 7:72f87b7c7400 64 //OCR2B = osc1.output>>8;
Pokitto 7:72f87b7c7400 65 #if POK_ENABLE_SOUND > 1
Pokitto 7:72f87b7c7400 66 soundbyte = (((osc1.output>>8) * (osc1.adsrvol >>8 )) >> 8) >> osc1.echodiv; // To output, shift back to 8-bit
Pokitto 7:72f87b7c7400 67 if (osc1.overdrive) soundbyte *= OVERDRIVE;
Pokitto 7:72f87b7c7400 68 if (osc1.kick ) soundbyte >>= 2;
Pokitto 7:72f87b7c7400 69 osc1.output = soundbyte;
Pokitto 7:72f87b7c7400 70 #endif
Pokitto 7:72f87b7c7400 71 #endif
Pokitto 7:72f87b7c7400 72 }
Pokitto 7:72f87b7c7400 73 }
Pokitto 7:72f87b7c7400 74
Pokitto 7:72f87b7c7400 75 void mix2(){
Pokitto 7:72f87b7c7400 76 // Track 2
Pokitto 7:72f87b7c7400 77 if (osc2.on) {
Pokitto 7:72f87b7c7400 78 Farr[osc2.wave](&osc2);
Pokitto 7:72f87b7c7400 79 #ifdef POK_SIM
Pokitto 7:72f87b7c7400 80 soundbyte = (((osc2.output>>8) * (osc2.adsrvol >>8 )) >> 8) >> osc2.echodiv;
Pokitto 7:72f87b7c7400 81 if (osc2.overdrive) soundbyte *= OVERDRIVE;
Pokitto 7:72f87b7c7400 82 if (osc2.kick ) soundbyte >>= 2;
Pokitto 7:72f87b7c7400 83 osc2.output = soundbyte;
Pokitto 7:72f87b7c7400 84 #else
Pokitto 7:72f87b7c7400 85 //OCR2B = osc2.output>>8;
Pokitto 7:72f87b7c7400 86 #if POK_ENABLE_SOUND > 1
Pokitto 7:72f87b7c7400 87 soundbyte = (((osc2.output>>8) * (osc2.adsrvol >>8 )) >> 8) >> osc2.echodiv;
Pokitto 7:72f87b7c7400 88 if (osc2.overdrive) soundbyte *= OVERDRIVE;
Pokitto 7:72f87b7c7400 89 if (osc2.kick ) soundbyte >>= 2;
Pokitto 7:72f87b7c7400 90 osc2.output = soundbyte;
Pokitto 7:72f87b7c7400 91 #endif
Pokitto 7:72f87b7c7400 92 #endif
Pokitto 7:72f87b7c7400 93 }
Pokitto 7:72f87b7c7400 94 }
Pokitto 7:72f87b7c7400 95
Pokitto 7:72f87b7c7400 96 void mix3(){
Pokitto 7:72f87b7c7400 97 // Track 3
Pokitto 7:72f87b7c7400 98 if (osc3.on) {
Pokitto 7:72f87b7c7400 99 Farr[osc3.wave](&osc3);
Pokitto 7:72f87b7c7400 100 #ifdef POK_SIM
Pokitto 7:72f87b7c7400 101 soundbyte = (((osc3.output>>8) * (osc3.adsrvol >>8 )) >> 8) >> osc3.echodiv;
Pokitto 7:72f87b7c7400 102 if (osc3.overdrive) soundbyte *= OVERDRIVE;
Pokitto 7:72f87b7c7400 103 if (osc3.kick ) soundbyte >>= 2;
Pokitto 7:72f87b7c7400 104 osc3.output = soundbyte;
Pokitto 7:72f87b7c7400 105 #else
Pokitto 7:72f87b7c7400 106 //OCR2B = osc3.output>>8;
Pokitto 7:72f87b7c7400 107 #if POK_ENABLE_SOUND > 1
Pokitto 7:72f87b7c7400 108 soundbyte = (((osc3.output>>8) * (osc3.adsrvol >>8 )) >> 8) >> osc3.echodiv;
Pokitto 7:72f87b7c7400 109 if (osc3.overdrive) soundbyte *= OVERDRIVE;
Pokitto 7:72f87b7c7400 110 if (osc3.kick ) soundbyte >>= 2;
Pokitto 7:72f87b7c7400 111 osc3.output = soundbyte;
Pokitto 7:72f87b7c7400 112 #endif
Pokitto 7:72f87b7c7400 113 #endif
Pokitto 7:72f87b7c7400 114 }
Pokitto 7:72f87b7c7400 115 }
Pokitto 7:72f87b7c7400 116
Pokitto 7:72f87b7c7400 117 void updateEnvelopes(){
Pokitto 7:72f87b7c7400 118 //calculate volume envelopes, I do this to save cpu power
Pokitto 7:72f87b7c7400 119 if (arptick) --arptick;
Pokitto 7:72f87b7c7400 120 else {
Pokitto 7:72f87b7c7400 121 if (osc1.arpmode && osc1.on) {
Pokitto 7:72f87b7c7400 122 osc1.cinc = cincs[osc1.tonic+arptable[osc1.arpmode][osc1.arpstep]];
Pokitto 7:72f87b7c7400 123 osc1.arpstep++;
Pokitto 7:72f87b7c7400 124 if (osc1.arpstep==ARPSTEPMAX) osc1.arpstep = 0;
Pokitto 7:72f87b7c7400 125 arptick = ARPTICK << (3-osc1.arpspeed);
Pokitto 7:72f87b7c7400 126 }
Pokitto 7:72f87b7c7400 127 if (osc2.arpmode && osc2.on) {
Pokitto 7:72f87b7c7400 128 osc2.cinc = cincs[osc2.tonic+arptable[osc2.arpmode][osc2.arpstep]];
Pokitto 7:72f87b7c7400 129 osc2.arpstep++;
Pokitto 7:72f87b7c7400 130 if (osc2.arpstep==ARPSTEPMAX) osc2.arpstep = 0;
Pokitto 7:72f87b7c7400 131 arptick = ARPTICK << (3-osc2.arpspeed);
Pokitto 7:72f87b7c7400 132 }
Pokitto 7:72f87b7c7400 133 if (osc3.arpmode && osc3.on) {
Pokitto 7:72f87b7c7400 134 osc3.cinc = cincs[osc3.tonic+arptable[osc3.arpmode][osc3.arpstep]];
Pokitto 7:72f87b7c7400 135 osc3.arpstep++;
Pokitto 7:72f87b7c7400 136 if (osc3.arpstep==ARPSTEPMAX) osc3.arpstep = 0;
Pokitto 7:72f87b7c7400 137 arptick = ARPTICK << (3-osc3.arpspeed);
Pokitto 7:72f87b7c7400 138 }
Pokitto 7:72f87b7c7400 139
Pokitto 7:72f87b7c7400 140 }
Pokitto 7:72f87b7c7400 141
Pokitto 7:72f87b7c7400 142 if (voltick) --voltick;
Pokitto 7:72f87b7c7400 143 else {
Pokitto 7:72f87b7c7400 144 bendtick = !bendtick;
Pokitto 7:72f87b7c7400 145 if (osc1.on) Earr[osc1.adsrphase](&osc1);
Pokitto 7:72f87b7c7400 146 if (bendtick) osc1.pitchbend += osc1.bendrate; //slow bend to every second beat
Pokitto 7:72f87b7c7400 147 if (osc1.bendrate > 0 && osc1.pitchbend > osc1.maxbend) {
Pokitto 7:72f87b7c7400 148 osc1.pitchbend = osc1.maxbend;
Pokitto 7:72f87b7c7400 149 osc1.bendrate = 0; // STOP BENDING !
Pokitto 7:72f87b7c7400 150 }
Pokitto 7:72f87b7c7400 151 else if (osc1.bendrate < 0 && osc1.pitchbend < osc1.maxbend) {
Pokitto 7:72f87b7c7400 152 osc1.pitchbend = osc1.maxbend;
Pokitto 7:72f87b7c7400 153 osc1.bendrate = 0; // STOP BENDING !
Pokitto 7:72f87b7c7400 154 }
Pokitto 7:72f87b7c7400 155
Pokitto 7:72f87b7c7400 156 if (osc2.on) Earr[osc2.adsrphase](&osc2);
Pokitto 7:72f87b7c7400 157 if (bendtick) osc2.pitchbend += osc2.bendrate;
Pokitto 7:72f87b7c7400 158 if (osc2.bendrate > 0 && osc2.pitchbend > osc2.maxbend) osc2.pitchbend = osc2.maxbend;
Pokitto 7:72f87b7c7400 159 else if (osc2.bendrate < 0 && osc2.pitchbend < osc2.maxbend) osc2.pitchbend = osc2.maxbend;
Pokitto 7:72f87b7c7400 160
Pokitto 7:72f87b7c7400 161 if (osc3.on) Earr[osc3.adsrphase](&osc3);
Pokitto 7:72f87b7c7400 162 if (bendtick) osc3.pitchbend += osc3.bendrate;
Pokitto 7:72f87b7c7400 163 if (osc3.bendrate > 0 && osc3.pitchbend > osc3.maxbend) osc3.pitchbend = osc3.maxbend;
Pokitto 7:72f87b7c7400 164 else if (osc3.bendrate < 0 && osc3.pitchbend < osc3.maxbend) osc3.pitchbend = osc3.maxbend;
Pokitto 7:72f87b7c7400 165
Pokitto 7:72f87b7c7400 166 voltick = VOLTICK;
Pokitto 7:72f87b7c7400 167 }
Pokitto 7:72f87b7c7400 168 tick = 4;
Pokitto 7:72f87b7c7400 169 }
Pokitto 7:72f87b7c7400 170