PokittoLib

Diff: POKITTO_LIBS/Synth/Synth_envfuncs.cpp

Revision:

31:f4b9b85c7b62

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/POKITTO_LIBS/Synth/Synth_envfuncs.cpp	Tue Jan 30 10:41:47 2018 +0000
@@ -0,0 +1,93 @@
+/**************************************************************************/
+/*!
+    @file     Synth_envfuncs.cpp
+    @author   Jonne Valola
+
+    @section LICENSE
+
+    Software License Agreement (BSD License)
+
+    Copyright (c) 2016, Jonne Valola
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+    1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holders nor the
+    names of its contributors may be used to endorse or promote products
+    derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/**************************************************************************/
+
+#include "Synth.h"
+
+/** ENVELOPE FUNCTIONS **/
+
+void noADSR(OSC* o){
+}
+
+void attackFunc(OSC* o){
+    if (o->adsrvol >= o->vol) {
+        if (o->decay) {
+            o->adsrvol = o->vol;
+            o->adsrphase = 2;
+        } else {
+            o->adsrvol = o->sustain;
+            o->adsrphase = 3;
+        }
+        return;
+    }
+    o->adsrvol += o->attack;
+}
+
+void decayFunc(OSC* o){
+    if (o->adsrvol >= o->sustain + o->decay) {
+        o->adsrvol -= o->decay;
+        return;
+    } else {
+        o->adsrvol = o->sustain;
+        o->adsrphase = 3;
+    }
+}
+
+void releaseFunc(OSC* o){
+    if (o->adsrvol > o->release) o->adsrvol -= o->release;
+    else o->adsrvol = 0;
+    if (!o->adsrvol) { // we have hit zero volume level
+        if (o->loop) {
+                if (o->attack) {
+                    o->adsrvol = 0;
+                } else {
+                    o->adsrvol = o->vol;
+                }
+                if (o->echo) o->echodiv++;
+                o->adsrphase = 1;
+                return;
+        }
+        else {
+                o->adsrphase = 0;
+                o->adsrvol = 0;
+                return;
+        }
+    }
+}
+
+
+
+
+