cv_reader.cc
// Copyright 2017 Olivier Gillet.
//
// Author: Olivier Gillet (ol.gillet@gmail.com)
//
// 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.
// 
// See http://creativecommons.org/licenses/MIT/ for more information.
//
// -----------------------------------------------------------------------------
//
// CV reader.

#include "stages/cv_reader.h"

#include <algorithm>

#include "stmlib/dsp/dsp.h"

#include "stages/settings.h"

namespace stages {
  
using namespace std;
using namespace stmlib;

void CvReader::Init(Settings* settings) {
  settings_ = settings;
  pots_adc_.Init();
  cv_adc_.Init();
  
  STATIC_ASSERT(kNumCvAdcChannels == kNumChannels, CV_ADC_CHANNEL_MISMATCH);
  STATIC_ASSERT(kNumAdcChannels == kNumChannels, POTS_ADC_CHANNEL_MISMATCH);
  
  fill(&lp_pot_[0], &lp_pot_[kNumChannels], 0.0f);
  fill(&lp_slider_[0], &lp_slider_[kNumChannels], 0.0f);
  fill(&lp_cv_[0], &lp_cv_[kNumChannels], 0.0f);
  fill(&lp_cv_2_[0], &lp_cv_2_[kNumChannels], 0.0f);
}

void CvReader::Read(IOBuffer::Block* block) {
  uint8_t pot_index = pots_adc_.pot_index();
  if (pot_index != 0xff) {
    ONE_POLE(
        lp_pot_[pot_index],
        pots_adc_.float_value(ADC_GROUP_POT, pot_index),
        0.1f);
  }
  
  for (size_t i = 0; i < kNumChannels; ++i) {
    const ChannelCalibrationData& c = settings_->calibration_data(i);
    ONE_POLE(lp_cv_[i], cv_adc_.float_value(i), 0.7f);
    ONE_POLE(lp_cv_2_[i], lp_cv_[i], 0.7f);
    
    float value = lp_cv_2_[i] * c.adc_scale + c.adc_offset;
    
    ONE_POLE(lp_slider_[i],
        pots_adc_.float_value(ADC_GROUP_SLIDER, i),
        0.025f);

    float combined_value = value + lp_slider_[i];
    CONSTRAIN(combined_value, -1.0f, 1.999995f);

    block->pot[i] = lp_pot_[i];
    block->cv_slider[i] = combined_value;
  }
  
  pots_adc_.Convert();
  cv_adc_.Convert();
}

}  // namespace stages