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 #include "SawtoothOscillator.h" 29 30 namespace marksynth { 31 /** 32 * Band limited sawtooth oscillator. 33 * Suitable as a sound source. 34 */ 35 36 class SawtoothOscillatorDPW : public SawtoothOscillator 37 { 38 public: SawtoothOscillatorDPW()39 SawtoothOscillatorDPW() 40 : SawtoothOscillator() 41 , dpw() {} 42 43 virtual ~SawtoothOscillatorDPW() = default; 44 translatePhase(synth_float_t phase,synth_float_t phaseIncrement)45 virtual inline synth_float_t translatePhase(synth_float_t phase, synth_float_t phaseIncrement) { 46 return dpw.next(phase, phaseIncrement); 47 } 48 49 private: 50 DifferentiatedParabola dpw; 51 }; 52 53 }; 54 #endif // SYNTHMARK_SAWTOOTH_OSCILLATOR_DPW_H 55