PokittoLib with changes to lcd refresh etc.
Fork of Pokitto by
This is a fork by user @Spinal, and is used in Pokittris for testing. Do not import this to your own program.
POKITTO_LIBS/Synth/Synth_wavefuncs.cpp
- Committer:
- Pokitto
- Date:
- 2017-09-18
- Revision:
- 0:e8b8f36b4505
File content as of revision 0:e8b8f36b4505:
/**************************************************************************/ /*! @file Synth_wavefuncs.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" uint16_t noiseval, noiseval2; void waveoff(OSC* o); void sqwave(OSC* o); void sawwave(OSC* o); void triwave(OSC* o); void noise(OSC* o); void tonenoise(OSC* o); void sample(OSC* o); void noADSR(OSC* o); void attackFunc(OSC* o); void decayFunc(OSC* o); void releaseFunc(OSC* o); void mix1(); void mix2(); void mix3(); void updateEnvelopes(); waveFunction Farr [] = {waveoff, sqwave, sawwave, triwave, noise, tonenoise}; envFunction Earr [] = {noADSR, attackFunc, decayFunc, releaseFunc}; mixFunction Marr [] = {updateEnvelopes,mix3,mix2,mix1}; // counts down mixFunction HWMarr [] = {updateEnvelopes,mix3,mix2,mix1}; // counts down /** SOUND FUNCTIONS **/ void waveoff(OSC* o){ o->output = 0; } void sqwave(OSC* o){ // square. If bit 16 set, its 2nd half of cycle and then output. if not, silence. if (o->count & 0x8000) o->output = 0; else o->output = 0xFFFF; } void sawwave(OSC* o){ // saw is just twice the count, so it happens 2 times in a cycle. o->output = o->count << 1; // simple, eh ? } void triwave(OSC* o){ // exploit the fact that above 0x7FFF bit 16 will be set (ie. when on second side of cycle) if (o->count & 0x8000) o->output = (~o->count) << 1; // counts down because complement goes other way else o->output = o->count << 1; // count up on first side of cycle } void noise(OSC* o){ // Standard libc random gives 10-12 fps // Xorshift16 gives 32-39 fps // Xorshift8 gives if (o->count > 0x8000) { o->output = noiseval2; //noiseval = random(0,0xFFFF); noiseval = xorshift16(); //noiseval = xorshift8()*256; } else { o->output = noiseval; //noiseval2 = random(0,0xFFFF); noiseval2 = xorshift16(); //noiseval2 = xorshift8()*256; } } void tonenoise(OSC* o){ // square. If bit 16 set, its 2nd half of cycle and then output. if not, silence. if (o->count & 0x8000) o->output = (xorshift16()>>6); //was 0 else o->output = (xorshift16()>>1) + 0x4000;//random(0,0xFFFF); } void sample(OSC* o) { /*if (o->samplepos > o->samplelength ) o->samplepos = 0; if (o->count > o->wcycle) { o->count=0; if (o->output) o->output = 0; //else o->output = o->output=pgm_read_byte((uint32_t)(sfxBike) + o->inccount); }*/ }