1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 * 16 * This code was translated from the JSyn Java code. 17 * JSyn is Copyright 2009 Phil Burk, Mobileer Inc 18 * JSyn is licensed under the Apache License, Version 2.0 19 */ 20 21 #ifndef SYNTHMARK_SAWTOOTH_OSCILLATOR_DPW_H 22 #define SYNTHMARK_SAWTOOTH_OSCILLATOR_DPW_H 23 24 #include <cstdint> 25 #include <math.h> 26 #include "SynthTools.h" 27 #include "DifferentiatedParabola.h" 28 29 namespace marksynth { 30 /** 31 * Band limited sawtooth oscillator. 32 * Suitable as a sound source. 33 */ 34 35 class SawtoothOscillatorDPW : public SawtoothOscillator 36 { 37 public: SawtoothOscillatorDPW()38 SawtoothOscillatorDPW() 39 : SawtoothOscillator() 40 , dpw() {} 41 42 virtual ~SawtoothOscillatorDPW() = default; 43 translatePhase(synth_float_t phase,synth_float_t phaseIncrement)44 virtual inline synth_float_t translatePhase(synth_float_t phase, synth_float_t phaseIncrement) { 45 return dpw.next(phase, phaseIncrement); 46 } 47 48 private: 49 DifferentiatedParabola dpw; 50 }; 51 52 }; 53 #endif // SYNTHMARK_SAWTOOTH_OSCILLATOR_DPW_H 54