spinal cord / PokittoLib_

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

POKITTO_LIBS/Synth/Synth_envfuncs.cpp@64:6e6c6c2b664e, 2018-11-18 (annotated)

Committer:
spinal
Date:
Sun Nov 18 15:47:54 2018 +0000
Revision:
64:6e6c6c2b664e
Parent:
31:f4b9b85c7b62 
added fix for directrectangle()

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Pokitto 31:f4b9b85c7b62 1 /**************************************************************************/
Pokitto 31:f4b9b85c7b62 2 /*!
Pokitto 31:f4b9b85c7b62 3 @file Synth_envfuncs.cpp
Pokitto 31:f4b9b85c7b62 4 @author Jonne Valola
Pokitto 31:f4b9b85c7b62 5
Pokitto 31:f4b9b85c7b62 6 @section LICENSE
Pokitto 31:f4b9b85c7b62 7
Pokitto 31:f4b9b85c7b62 8 Software License Agreement (BSD License)
Pokitto 31:f4b9b85c7b62 9
Pokitto 31:f4b9b85c7b62 10 Copyright (c) 2016, Jonne Valola
Pokitto 31:f4b9b85c7b62 11 All rights reserved.
Pokitto 31:f4b9b85c7b62 12
Pokitto 31:f4b9b85c7b62 13 Redistribution and use in source and binary forms, with or without
Pokitto 31:f4b9b85c7b62 14 modification, are permitted provided that the following conditions are met:
Pokitto 31:f4b9b85c7b62 15 1. Redistributions of source code must retain the above copyright
Pokitto 31:f4b9b85c7b62 16 notice, this list of conditions and the following disclaimer.
Pokitto 31:f4b9b85c7b62 17 2. Redistributions in binary form must reproduce the above copyright
Pokitto 31:f4b9b85c7b62 18 notice, this list of conditions and the following disclaimer in the
Pokitto 31:f4b9b85c7b62 19 documentation and/or other materials provided with the distribution.
Pokitto 31:f4b9b85c7b62 20 3. Neither the name of the copyright holders nor the
Pokitto 31:f4b9b85c7b62 21 names of its contributors may be used to endorse or promote products
Pokitto 31:f4b9b85c7b62 22 derived from this software without specific prior written permission.
Pokitto 31:f4b9b85c7b62 23
Pokitto 31:f4b9b85c7b62 24 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
Pokitto 31:f4b9b85c7b62 25 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
Pokitto 31:f4b9b85c7b62 26 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
Pokitto 31:f4b9b85c7b62 27 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
Pokitto 31:f4b9b85c7b62 28 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
Pokitto 31:f4b9b85c7b62 29 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
Pokitto 31:f4b9b85c7b62 30 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
Pokitto 31:f4b9b85c7b62 31 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
Pokitto 31:f4b9b85c7b62 32 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Pokitto 31:f4b9b85c7b62 33 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Pokitto 31:f4b9b85c7b62 34 */
Pokitto 31:f4b9b85c7b62 35 /**************************************************************************/
Pokitto 31:f4b9b85c7b62 36
Pokitto 31:f4b9b85c7b62 37 #include "Synth.h"
Pokitto 31:f4b9b85c7b62 38
Pokitto 31:f4b9b85c7b62 39 /** ENVELOPE FUNCTIONS **/
Pokitto 31:f4b9b85c7b62 40
Pokitto 31:f4b9b85c7b62 41 void noADSR(OSC* o){
Pokitto 31:f4b9b85c7b62 42 }
Pokitto 31:f4b9b85c7b62 43
Pokitto 31:f4b9b85c7b62 44 void attackFunc(OSC* o){
Pokitto 31:f4b9b85c7b62 45 if (o->adsrvol >= o->vol) {
Pokitto 31:f4b9b85c7b62 46 if (o->decay) {
Pokitto 31:f4b9b85c7b62 47 o->adsrvol = o->vol;
Pokitto 31:f4b9b85c7b62 48 o->adsrphase = 2;
Pokitto 31:f4b9b85c7b62 49 } else {
Pokitto 31:f4b9b85c7b62 50 o->adsrvol = o->sustain;
Pokitto 31:f4b9b85c7b62 51 o->adsrphase = 3;
Pokitto 31:f4b9b85c7b62 52 }
Pokitto 31:f4b9b85c7b62 53 return;
Pokitto 31:f4b9b85c7b62 54 }
Pokitto 31:f4b9b85c7b62 55 o->adsrvol += o->attack;
Pokitto 31:f4b9b85c7b62 56 }
Pokitto 31:f4b9b85c7b62 57
Pokitto 31:f4b9b85c7b62 58 void decayFunc(OSC* o){
Pokitto 31:f4b9b85c7b62 59 if (o->adsrvol >= o->sustain + o->decay) {
Pokitto 31:f4b9b85c7b62 60 o->adsrvol -= o->decay;
Pokitto 31:f4b9b85c7b62 61 return;
Pokitto 31:f4b9b85c7b62 62 } else {
Pokitto 31:f4b9b85c7b62 63 o->adsrvol = o->sustain;
Pokitto 31:f4b9b85c7b62 64 o->adsrphase = 3;
Pokitto 31:f4b9b85c7b62 65 }
Pokitto 31:f4b9b85c7b62 66 }
Pokitto 31:f4b9b85c7b62 67
Pokitto 31:f4b9b85c7b62 68 void releaseFunc(OSC* o){
Pokitto 31:f4b9b85c7b62 69 if (o->adsrvol > o->release) o->adsrvol -= o->release;
Pokitto 31:f4b9b85c7b62 70 else o->adsrvol = 0;
Pokitto 31:f4b9b85c7b62 71 if (!o->adsrvol) { // we have hit zero volume level
Pokitto 31:f4b9b85c7b62 72 if (o->loop) {
Pokitto 31:f4b9b85c7b62 73 if (o->attack) {
Pokitto 31:f4b9b85c7b62 74 o->adsrvol = 0;
Pokitto 31:f4b9b85c7b62 75 } else {
Pokitto 31:f4b9b85c7b62 76 o->adsrvol = o->vol;
Pokitto 31:f4b9b85c7b62 77 }
Pokitto 31:f4b9b85c7b62 78 if (o->echo) o->echodiv++;
Pokitto 31:f4b9b85c7b62 79 o->adsrphase = 1;
Pokitto 31:f4b9b85c7b62 80 return;
Pokitto 31:f4b9b85c7b62 81 }
Pokitto 31:f4b9b85c7b62 82 else {
Pokitto 31:f4b9b85c7b62 83 o->adsrphase = 0;
Pokitto 31:f4b9b85c7b62 84 o->adsrvol = 0;
Pokitto 31:f4b9b85c7b62 85 return;
Pokitto 31:f4b9b85c7b62 86 }
Pokitto 31:f4b9b85c7b62 87 }
Pokitto 31:f4b9b85c7b62 88 }
Pokitto 31:f4b9b85c7b62 89
Pokitto 31:f4b9b85c7b62 90
Pokitto 31:f4b9b85c7b62 91
Pokitto 31:f4b9b85c7b62 92
Pokitto 31:f4b9b85c7b62 93