/* Audio Library for Teensy 3.X
   Copyright (c) 2014, Pete (El Supremo)
   Copyright (c) 2019, Holger Wirtz

   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 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 effect_modulated_chorus_h_
#define effect_modulated_chorus_h_

#include "Arduino.h"
#include "AudioStream.h"

/*************************************************************************/

//                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
// Written by Pete (El Supremo) Jan 2014
// 140219 - correct storage class (not static)
// 190527 - added modulation input handling (by Holger Wirtz)

class AudioEffectModulatedDelay :
  public AudioStream
{
  public:
    AudioEffectModulatedDelay(void):
      AudioStream(2, inputQueueArray)
    { }

    boolean begin(short *delayline, int delay_length);
    virtual void update(void);
    virtual void setDelay(float milliseconds);
    virtual void setModFilter(float cFrq, float gain, float width);

  private:
    virtual void calcModFilterCoeff(float32_t cFrq, float32_t gain, float32_t width);

    audio_block_t *inputQueueArray[2];
    int16_t *_delayline;
    uint16_t _circ_idx;
    uint16_t _max_delay_length;
    uint16_t _delay_length;
    // filter data
    arm_biquad_casd_df1_inst_f32 filter;
    float32_t modulation_f32[AUDIO_BLOCK_SAMPLES];
    float32_t filter_coeffs[5];
    float32_t filter_state[4];
};

#endif
