Jonne Valola / PokittoLib Featured

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

Dependents:   YATTT sd_map_test cPong SnowDemo ... more

PokittoLib

Library for programming Pokitto hardware

How to Use

  1. Import this library to online compiler (see button "import" on the right hand side
  2. DO NOT import mbed-src anymore, a better version is now included inside PokittoLib
  3. Change My_settings.h according to your project
  4. Start coding!

POKITTO_LIBS/Synth/Synth_mixfuncs.cpp@0:e8b8f36b4505, 2017-09-18 (annotated)

Committer:
Pokitto
Date:
Mon Sep 18 11:47:51 2017 +0000
Revision:
0:e8b8f36b4505
Child:
1:4b1511a0a2c2
Initial;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Pokitto 0:e8b8f36b4505 1 /**************************************************************************/
Pokitto 0:e8b8f36b4505 2 /*!
Pokitto 0:e8b8f36b4505 3 @file Synth_mixfuncs.cpp
Pokitto 0:e8b8f36b4505 4 @author Jonne Valola
Pokitto 0:e8b8f36b4505 5
Pokitto 0:e8b8f36b4505 6 @section LICENSE
Pokitto 0:e8b8f36b4505 7
Pokitto 0:e8b8f36b4505 8 Software License Agreement (BSD License)
Pokitto 0:e8b8f36b4505 9
Pokitto 0:e8b8f36b4505 10 Copyright (c) 2016, Jonne Valola
Pokitto 0:e8b8f36b4505 11 All rights reserved.
Pokitto 0:e8b8f36b4505 12
Pokitto 0:e8b8f36b4505 13 Redistribution and use in source and binary forms, with or without
Pokitto 0:e8b8f36b4505 14 modification, are permitted provided that the following conditions are met:
Pokitto 0:e8b8f36b4505 15 1. Redistributions of source code must retain the above copyright
Pokitto 0:e8b8f36b4505 16 notice, this list of conditions and the following disclaimer.
Pokitto 0:e8b8f36b4505 17 2. Redistributions in binary form must reproduce the above copyright
Pokitto 0:e8b8f36b4505 18 notice, this list of conditions and the following disclaimer in the
Pokitto 0:e8b8f36b4505 19 documentation and/or other materials provided with the distribution.
Pokitto 0:e8b8f36b4505 20 3. Neither the name of the copyright holders nor the
Pokitto 0:e8b8f36b4505 21 names of its contributors may be used to endorse or promote products
Pokitto 0:e8b8f36b4505 22 derived from this software without specific prior written permission.
Pokitto 0:e8b8f36b4505 23
Pokitto 0:e8b8f36b4505 24 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
Pokitto 0:e8b8f36b4505 25 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
Pokitto 0:e8b8f36b4505 26 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
Pokitto 0:e8b8f36b4505 27 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
Pokitto 0:e8b8f36b4505 28 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
Pokitto 0:e8b8f36b4505 29 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
Pokitto 0:e8b8f36b4505 30 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
Pokitto 0:e8b8f36b4505 31 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
Pokitto 0:e8b8f36b4505 32 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Pokitto 0:e8b8f36b4505 33 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Pokitto 0:e8b8f36b4505 34 */
Pokitto 0:e8b8f36b4505 35 /**************************************************************************/
Pokitto 0:e8b8f36b4505 36
Pokitto 0:e8b8f36b4505 37 #include "PokittoGlobs.h"
Pokitto 0:e8b8f36b4505 38 #include "Synth.h"
Pokitto 0:e8b8f36b4505 39
Pokitto 0:e8b8f36b4505 40 /** MIXING FUNCTIONS **/
Pokitto 0:e8b8f36b4505 41
Pokitto 0:e8b8f36b4505 42 char voltick=0; // i need to make volume changes even slower
Pokitto 0:e8b8f36b4505 43 uint16_t arptick=0; // i need to make volume changes even slower
Pokitto 0:e8b8f36b4505 44 int8_t bendtick = 0; // ditto for bend.
Pokitto 0:e8b8f36b4505 45
Pokitto 0:e8b8f36b4505 46
Pokitto 0:e8b8f36b4505 47 void mix1(){
Pokitto 0:e8b8f36b4505 48 // Track 1
Pokitto 0:e8b8f36b4505 49 if (osc1.on) {
Pokitto 0:e8b8f36b4505 50 Farr[osc1.wave](&osc1);
Pokitto 0:e8b8f36b4505 51 #if PROJ_ARDUBOY > 0
Pokitto 0:e8b8f36b4505 52 if (osc1.duration) {
Pokitto 0:e8b8f36b4505 53 /**this is special for osc1 and is only used to emulate arduino Tone(); */
Pokitto 0:e8b8f36b4505 54 osc1.duration--;
Pokitto 0:e8b8f36b4505 55 } else osc1.on = 0;
Pokitto 0:e8b8f36b4505 56 #endif
Pokitto 0:e8b8f36b4505 57
Pokitto 0:e8b8f36b4505 58 #ifdef POK_SIM
Pokitto 0:e8b8f36b4505 59 soundbyte = (((osc1.output>>8) * (osc1.adsrvol >>8 )) >> 8) >> osc1.echodiv; // To output, shift back to 8-bit
Pokitto 0:e8b8f36b4505 60 if (osc1.overdrive) soundbyte *= OVERDRIVE;
Pokitto 0:e8b8f36b4505 61 if (osc1.kick ) soundbyte >>= 2;
Pokitto 0:e8b8f36b4505 62 osc1.output = soundbyte;
Pokitto 0:e8b8f36b4505 63 #else
Pokitto 0:e8b8f36b4505 64 //OCR2B = osc1.output>>8;
Pokitto 0:e8b8f36b4505 65 soundbyte = (((osc1.output>>8) * (osc1.adsrvol >>8 )) >> 8) >> osc1.echodiv; // To output, shift back to 8-bit
Pokitto 0:e8b8f36b4505 66 if (osc1.overdrive) soundbyte *= OVERDRIVE;
Pokitto 0:e8b8f36b4505 67 if (osc1.kick ) soundbyte >>= 2;
Pokitto 0:e8b8f36b4505 68 osc1.output = soundbyte;
Pokitto 0:e8b8f36b4505 69 #endif
Pokitto 0:e8b8f36b4505 70 }
Pokitto 0:e8b8f36b4505 71 }
Pokitto 0:e8b8f36b4505 72
Pokitto 0:e8b8f36b4505 73 void mix2(){
Pokitto 0:e8b8f36b4505 74 // Track 2
Pokitto 0:e8b8f36b4505 75 if (osc2.on) {
Pokitto 0:e8b8f36b4505 76 Farr[osc2.wave](&osc2);
Pokitto 0:e8b8f36b4505 77 #ifdef POK_SIM
Pokitto 0:e8b8f36b4505 78 soundbyte = (((osc2.output>>8) * (osc2.adsrvol >>8 )) >> 8) >> osc2.echodiv;
Pokitto 0:e8b8f36b4505 79 if (osc2.overdrive) soundbyte *= OVERDRIVE;
Pokitto 0:e8b8f36b4505 80 if (osc2.kick ) soundbyte >>= 2;
Pokitto 0:e8b8f36b4505 81 osc2.output = soundbyte;
Pokitto 0:e8b8f36b4505 82 #else
Pokitto 0:e8b8f36b4505 83 //OCR2B = osc2.output>>8;
Pokitto 0:e8b8f36b4505 84 soundbyte = (((osc2.output>>8) * (osc2.adsrvol >>8 )) >> 8) >> osc2.echodiv;
Pokitto 0:e8b8f36b4505 85 if (osc2.overdrive) soundbyte *= OVERDRIVE;
Pokitto 0:e8b8f36b4505 86 if (osc2.kick ) soundbyte >>= 2;
Pokitto 0:e8b8f36b4505 87 osc2.output = soundbyte;
Pokitto 0:e8b8f36b4505 88 #endif
Pokitto 0:e8b8f36b4505 89 }
Pokitto 0:e8b8f36b4505 90 }
Pokitto 0:e8b8f36b4505 91
Pokitto 0:e8b8f36b4505 92 void mix3(){
Pokitto 0:e8b8f36b4505 93 // Track 3
Pokitto 0:e8b8f36b4505 94 if (osc3.on) {
Pokitto 0:e8b8f36b4505 95 Farr[osc3.wave](&osc3);
Pokitto 0:e8b8f36b4505 96 #ifdef POK_SIM
Pokitto 0:e8b8f36b4505 97 soundbyte = (((osc3.output>>8) * (osc3.adsrvol >>8 )) >> 8) >> osc3.echodiv;
Pokitto 0:e8b8f36b4505 98 if (osc3.overdrive) soundbyte *= OVERDRIVE;
Pokitto 0:e8b8f36b4505 99 if (osc3.kick ) soundbyte >>= 2;
Pokitto 0:e8b8f36b4505 100 osc3.output = soundbyte;
Pokitto 0:e8b8f36b4505 101 #else
Pokitto 0:e8b8f36b4505 102 //OCR2B = osc3.output>>8;
Pokitto 0:e8b8f36b4505 103 soundbyte = (((osc3.output>>8) * (osc3.adsrvol >>8 )) >> 8) >> osc3.echodiv;
Pokitto 0:e8b8f36b4505 104 if (osc3.overdrive) soundbyte *= OVERDRIVE;
Pokitto 0:e8b8f36b4505 105 if (osc3.kick ) soundbyte >>= 2;
Pokitto 0:e8b8f36b4505 106 osc3.output = soundbyte;
Pokitto 0:e8b8f36b4505 107 #endif
Pokitto 0:e8b8f36b4505 108 }
Pokitto 0:e8b8f36b4505 109 }
Pokitto 0:e8b8f36b4505 110
Pokitto 0:e8b8f36b4505 111 void updateEnvelopes(){
Pokitto 0:e8b8f36b4505 112 //calculate volume envelopes, I do this to save cpu power
Pokitto 0:e8b8f36b4505 113 if (arptick) --arptick;
Pokitto 0:e8b8f36b4505 114 else {
Pokitto 0:e8b8f36b4505 115 if (osc1.arpmode && osc1.on) {
Pokitto 0:e8b8f36b4505 116 osc1.cinc = cincs[osc1.tonic+arptable[osc1.arpmode][osc1.arpstep]];
Pokitto 0:e8b8f36b4505 117 osc1.arpstep++;
Pokitto 0:e8b8f36b4505 118 if (osc1.arpstep==ARPSTEPMAX) osc1.arpstep = 0;
Pokitto 0:e8b8f36b4505 119 arptick = ARPTICK << (3-osc1.arpspeed);
Pokitto 0:e8b8f36b4505 120 }
Pokitto 0:e8b8f36b4505 121 if (osc2.arpmode && osc2.on) {
Pokitto 0:e8b8f36b4505 122 osc2.cinc = cincs[osc2.tonic+arptable[osc2.arpmode][osc2.arpstep]];
Pokitto 0:e8b8f36b4505 123 osc2.arpstep++;
Pokitto 0:e8b8f36b4505 124 if (osc2.arpstep==ARPSTEPMAX) osc2.arpstep = 0;
Pokitto 0:e8b8f36b4505 125 arptick = ARPTICK << (3-osc2.arpspeed);
Pokitto 0:e8b8f36b4505 126 }
Pokitto 0:e8b8f36b4505 127 if (osc3.arpmode && osc3.on) {
Pokitto 0:e8b8f36b4505 128 osc3.cinc = cincs[osc3.tonic+arptable[osc3.arpmode][osc3.arpstep]];
Pokitto 0:e8b8f36b4505 129 osc3.arpstep++;
Pokitto 0:e8b8f36b4505 130 if (osc3.arpstep==ARPSTEPMAX) osc3.arpstep = 0;
Pokitto 0:e8b8f36b4505 131 arptick = ARPTICK << (3-osc3.arpspeed);
Pokitto 0:e8b8f36b4505 132 }
Pokitto 0:e8b8f36b4505 133
Pokitto 0:e8b8f36b4505 134 }
Pokitto 0:e8b8f36b4505 135
Pokitto 0:e8b8f36b4505 136 if (voltick) --voltick;
Pokitto 0:e8b8f36b4505 137 else {
Pokitto 0:e8b8f36b4505 138 bendtick = !bendtick;
Pokitto 0:e8b8f36b4505 139 if (osc1.on) Earr[osc1.adsrphase](&osc1);
Pokitto 0:e8b8f36b4505 140 if (bendtick) osc1.pitchbend += osc1.bendrate; //slow bend to every second beat
Pokitto 0:e8b8f36b4505 141 if (osc1.bendrate > 0 && osc1.pitchbend > osc1.maxbend) {
Pokitto 0:e8b8f36b4505 142 osc1.pitchbend = osc1.maxbend;
Pokitto 0:e8b8f36b4505 143 osc1.bendrate = 0; // STOP BENDING !
Pokitto 0:e8b8f36b4505 144 }
Pokitto 0:e8b8f36b4505 145 else if (osc1.bendrate < 0 && osc1.pitchbend < osc1.maxbend) {
Pokitto 0:e8b8f36b4505 146 osc1.pitchbend = osc1.maxbend;
Pokitto 0:e8b8f36b4505 147 osc1.bendrate = 0; // STOP BENDING !
Pokitto 0:e8b8f36b4505 148 }
Pokitto 0:e8b8f36b4505 149
Pokitto 0:e8b8f36b4505 150 if (osc2.on) Earr[osc2.adsrphase](&osc2);
Pokitto 0:e8b8f36b4505 151 if (bendtick) osc2.pitchbend += osc2.bendrate;
Pokitto 0:e8b8f36b4505 152 if (osc2.bendrate > 0 && osc2.pitchbend > osc2.maxbend) osc2.pitchbend = osc2.maxbend;
Pokitto 0:e8b8f36b4505 153 else if (osc2.bendrate < 0 && osc2.pitchbend < osc2.maxbend) osc2.pitchbend = osc2.maxbend;
Pokitto 0:e8b8f36b4505 154
Pokitto 0:e8b8f36b4505 155 if (osc3.on) Earr[osc3.adsrphase](&osc3);
Pokitto 0:e8b8f36b4505 156 if (bendtick) osc3.pitchbend += osc3.bendrate;
Pokitto 0:e8b8f36b4505 157 if (osc3.bendrate > 0 && osc3.pitchbend > osc3.maxbend) osc3.pitchbend = osc3.maxbend;
Pokitto 0:e8b8f36b4505 158 else if (osc3.bendrate < 0 && osc3.pitchbend < osc3.maxbend) osc3.pitchbend = osc3.maxbend;
Pokitto 0:e8b8f36b4505 159
Pokitto 0:e8b8f36b4505 160 voltick = VOLTICK;
Pokitto 0:e8b8f36b4505 161 }
Pokitto 0:e8b8f36b4505 162 tick = 4;
Pokitto 0:e8b8f36b4505 163 }
Pokitto 0:e8b8f36b4505 164