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79 lines
2.5 KiB
79 lines
2.5 KiB
// Taken from https://github.com/manicken/Audio/tree/templateMixer
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// Adapted for MiniDexed by Holger Wirtz <dcoredump@googlemail.com>
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/* Audio Library for Teensy 3.X
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* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
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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 template_mixer_h_
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#define template_mixer_h_
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#include "arm_math.h"
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#include <stdint.h>
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#define UNITYGAIN 1.0f
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#define MAX_GAIN 1.0f
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#define MIN_GAIN 0.0f
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template <int NN> class AudioMixer
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{
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public:
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AudioMixer(void)
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{
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for (uint8_t i=0; i<NN; i++)
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multiplier[i] = UNITYGAIN;
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}
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void doAddMix(uint8_t channel, float32_t* in, float32_t* out, uint16_t len);
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/**
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* this sets the individual gains
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* @param channel
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* @param gain
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*/
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void gain(uint8_t channel, float32_t gain);
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/**
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* set all channels to specified gain
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* @param gain
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*/
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void gain(float32_t gain);
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protected:
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float32_t multiplier[NN];
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};
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template <int NN> class AudioStereoMixer : public AudioMixer<NN>
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{
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public:
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AudioStereoMixer(void)
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{
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AudioMixer<NN>();
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for (uint8_t i=0; i<NN; i++)
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panorama[i] = 0.0;
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}
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void doAddMix(uint8_t channel, float32_t* in[], float32_t* out[], uint16_t len);
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protected:
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float32_t panorama[NN];
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};
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#endif
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