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83 lines
2.9 KiB
83 lines
2.9 KiB
/* mono to stereo expander for Teensy 4
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* 32bit float version for OpenAudio_ArduinoLibrary:
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* https://github.com/chipaudette/OpenAudio_ArduinoLibrary
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*
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* Author: Piotr Zapart
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* www.hexefx.com
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*
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* Copyright (c) 2021 by Piotr Zapart
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*
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* Development of this audio library was funded by PJRC.COM, LLC by sales of
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* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
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* open source software by purchasing Teensy or other PJRC products.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice, development funding notice, and this permission
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* notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef _EFFECT_MONOTOSTEREO_F32_H
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#define _EFFECT_MONOTOSTEREO_F32_H
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#include <Arduino.h>
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#include "AudioStream_F32.h"
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#include "arm_math.h"
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#define ALLP_NETWORK_LEN 21
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class AudioEffectMonoToStereo_F32 : public AudioStream_F32
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{
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public:
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AudioEffectMonoToStereo_F32();
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~AudioEffectMonoToStereo_F32();
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virtual void update();
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void setSpread(float32_t val)
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{
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val = constrain(val, 0.0f, 1.0f);
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__disable_irq();
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width = val;
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__enable_irq();
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}
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void setPan(float32_t val)
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{
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float32_t a, b;
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val = constrain(val, -1.0f, 1.0f);
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a = map(val, -1.0f, 1.0f, -0.707f, 0.707f);
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b = 1.0f - abs(val*0.293f);
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__disable_irq();
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pansin = a;
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pancos = b;
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__enable_irq();
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}
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void setBypass(bool state) {bypass = state;}
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bool tglBypass(void) {bypass ^= 1; return bypass;}
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bool getBypass(void) { return bypass;}
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private:
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bool bypass;
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float32_t width;
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float32_t pancos, pansin;
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float32_t do_allp_netw(float32_t inSig, float32_t *x, float32_t *y);
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float32_t allpass_netw_1x[ALLP_NETWORK_LEN];
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float32_t allpass_netw_1y[ALLP_NETWORK_LEN];
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float32_t allpass_netw_2x[ALLP_NETWORK_LEN];
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float32_t allpass_netw_2y[ALLP_NETWORK_LEN];
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audio_block_f32_t *inputQueueArray_f32[1];
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};
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#endif // _EFFECT_MONOTOSTEREO_F32_H
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