/* Extended to f32 data Created: Chip Audette, OpenAudio, Feb 2017 License: MIT License. Use at your own risk. */ /* Audio Library for Teensy 3.X * Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com * * Development of this audio library was funded by PJRC.COM, LLC by sales of * Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop * open source software by purchasing Teensy or other PJRC products. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice, development funding notice, and this permission * notice shall be included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #ifndef synth_pinknoise_f32_h_ #define synth_pinknoise_f32_h_ #include "Arduino.h" #include "AudioStream.h" #include "AudioStream_F32.h" #include "utility/dspinst.h" class AudioSynthNoisePink_F32 : public AudioStream_F32 { //GUI: inputs:0, outputs:1 //this line used for automatic generation of GUI node //GUI: shortName:pinknoise //this line used for automatic generation of GUI node public: AudioSynthNoisePink_F32() : AudioStream_F32(0, NULL) { setDefaultValues(); enabled = 1; } AudioSynthNoisePink_F32(const AudioSettings_F32 &settings) : AudioStream_F32(0, NULL) { setDefaultValues(); enabled = 1; } void setDefaultValues() { plfsr = 0x5EED41F5 + instance_cnt++; paccu = 0; pncnt = 0; pinc = 0x0CCC; pdec = 0x0CCC; } void amplitude(float n) { if (n < 0.0) n = 0.0; else if (n > 1.0) n = 1.0; level = (int32_t)(n * 65536.0); } virtual void update(void); int enabled = 0; private: static const uint8_t pnmask[256]; static const int32_t pfira[64]; static const int32_t pfirb[64]; static int16_t instance_cnt; int32_t plfsr; // linear feedback shift register int32_t pinc; // increment for all noise sources (bits) int32_t pdec; // decrement for all noise sources int32_t paccu; // accumulator uint8_t pncnt; // overflowing counter as index to pnmask[] int32_t level; // 0=off, 65536=max }; #endif