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64 lines
2.5 KiB
64 lines
2.5 KiB
/* Audio Library for Teensy 3.X
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Copyright (c) 2014, Pete (El Supremo)
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Copyright (c) 2019, Holger Wirtz
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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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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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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_modulated_chorus_h_
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#define effect_modulated_chorus_h_
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#include "Arduino.h"
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#include "AudioStream.h"
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#include "config.h"
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#define MODULATION_MAX_FACTOR 0.75
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/*************************************************************************/
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// A u d i o E f f e c t M o d u l a t e d D e l a y
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// Written by Pete (El Supremo) Jan 2014
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// 140219 - correct storage class (not static)
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// 190527 - added modulation input handling (Aug 2019 by Holger Wirtz)
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class AudioEffectModulatedDelay :
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public AudioStream
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{
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public:
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AudioEffectModulatedDelay(void):
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AudioStream(2, inputQueueArray)
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{ }
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boolean begin(short *delayline, int delay_length);
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virtual void update(void);
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virtual float offset(float offset_value);
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private:
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void set_modulator_filter_coeffs(void);
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audio_block_t *inputQueueArray[2];
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int16_t *_delayline; // pointer for the circular buffer
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uint16_t _cb_index; // current write pointer of the circular buffer
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uint16_t _delay_offset; // number of samples for the read offset of the modulation inside the circular buffer
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uint16_t _delay_length; // calculated number of samples of the delay
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int16_t cb_mod_index; // current read pointer with modulation for the circular buffer
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arm_biquad_casd_df1_inst_f32 modulator_filter_data;
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float32_t modulator_filter_state[4];
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float32_t modulator_filter_coeffs[5];
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};
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#endif
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