modal_engine.cc
// Copyright 2016 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.
//
// -----------------------------------------------------------------------------
//
// One voice of modal synthesis.

#include "plaits/dsp/engine/modal_engine.h"

#include <algorithm>

namespace plaits {

using namespace std;
using namespace stmlib;

void ModalEngine::Init(BufferAllocator* allocator) {
  temp_buffer_ = allocator->Allocate<float>(kMaxBlockSize);
  harmonics_lp_ = 0.0f;
  Reset();
}

void ModalEngine::Reset() {
  voice_.Init();
}

void ModalEngine::Render(
    const EngineParameters& parameters,
    float* out,
    float* aux,
    size_t size,
    bool* already_enveloped) {
  fill(&out[0], &out[size], 0.0f);
  fill(&aux[0], &aux[size], 0.0f);
  
  ONE_POLE(harmonics_lp_, parameters.harmonics, 0.01f);
  
  voice_.Render(
      parameters.trigger & TRIGGER_UNPATCHED,
      parameters.trigger & TRIGGER_RISING_EDGE,
      parameters.accent,
      NoteToFrequency(parameters.note),
      harmonics_lp_,
      parameters.timbre,
      parameters.morph,
      temp_buffer_,
      out,
      aux,
      size);
}

}  // namespace plaits