mirror of https://github.com/probonopd/MiniDexed
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Subproject commit 70293ae5998643c706244b090504dde8b4097851 |
Subproject commit e414a8718300815aefc3fe0acd8df5c12ad0b58a |
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#ifndef _common_h |
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#define _common_h |
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inline long maplong(long x, long in_min, long in_max, long out_min, long out_max) { |
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return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; |
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} |
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inline float32_t mapfloat(float32_t val, float32_t in_min, float32_t in_max, float32_t out_min, float32_t out_max) |
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{ |
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return (val - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; |
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} |
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#define constrain(amt, low, high) ({ \ |
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__typeof__(amt) _amt = (amt); \
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__typeof__(low) _low = (low); \
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__typeof__(high) _high = (high); \
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(_amt < _low) ? _low : ((_amt > _high) ? _high : _amt); \
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}) |
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#endif |
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// 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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#include <cstdlib> |
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#include <stdint.h> |
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#include <assert.h> |
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#include "arm_math.h" |
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#include "mixer.h" |
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template <int NN> void AudioMixer<NN>::gain(uint8_t channel, float32_t gain) |
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{ |
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if (channel >= NN) return; |
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if (gain > MAX_GAIN) |
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gain = MAX_GAIN; |
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else if (gain < MIN_GAIN) |
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gain = MIN_GAIN; |
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multiplier[channel] = gain; |
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} |
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template <int NN> void AudioMixer<NN>::gain(float32_t gain) |
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{ |
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for (uint8_t i = 0; i < NN; i++) |
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{ |
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if (gain > MAX_GAIN) |
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gain = MAX_GAIN; |
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else if (gain < MIN_GAIN) |
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gain = MIN_GAIN; |
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multiplier[i] = gain; |
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}
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} |
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template <int NN> void AudioMixer<NN>::doAddMix(uint8_t channel, float32_t* in, float32_t* out, uint16_t len) |
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{ |
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float32_t* tmp=malloc(sizeof(float32_t)*len); |
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assert(tmp!=NULL); |
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arm_scale_f32(in,multiplier[channel],tmp,len); |
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arm_add_f32(out, tmp, out, len); |
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free(tmp); |
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} |
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template <int NN> void AudioStereoMixer<NN>::doAddMix(uint8_t channel, float32_t* in[], float32_t* out[], uint16_t len) |
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{ |
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float32_t* tmp=malloc(sizeof(float32_t)*len); |
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assert(tmp!=NULL); |
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// panorama
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for(uint16_t i=0;i<len;i++) |
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{ |
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// left
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arm_scale_f32(in+(i*2),multiplier[channel],tmp+(i*2),len); |
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arm_add_f32(out(i*2), tmp(i*2), out(i*2), len*2); |
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// right
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} |
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free(tmp); |
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} |
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@ -0,0 +1,79 @@ |
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// 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 |
||||||
|
* 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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