Line data    Source code

       1              : /*
       2              :  * SPDX-License-Identifier: GPL-3.0-only
       3              :  * MuseScore-CLA-applies
       4              :  *
       5              :  * MuseScore Studio
       6              :  * Music Composition & Notation
       7              :  *
       8              :  * Copyright (C) 2023 MuseScore Limited and others
       9              :  *
      10              :  * This program is free software: you can redistribute it and/or modify
      11              :  * it under the terms of the GNU General Public License version 3 as
      12              :  * published by the Free Software Foundation.
      13              :  *
      14              :  * This program is distributed in the hope that it will be useful,
      15              :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      16              :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      17              :  * GNU General Public License for more details.
      18              :  *
      19              :  * You should have received a copy of the GNU General Public License
      20              :  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
      21              :  */
      22              : 
      23              : #ifndef MUSE_AUDIO_ALLPASSDISPERSION_H
      24              : #define MUSE_AUDIO_ALLPASSDISPERSION_H
      25              : 
      26              : #include "iirbiquadfilter.h"
      27              : 
      28              : namespace muse::audio::fx {
      29              : class AllPassDispersion
      30              : {
      31              : public:
      32            0 :     AllPassDispersion()
      33            0 :     {
      34              :         // these values have been manually tuned to produce a 50-sample IR that has a (low) peak of 0.453731
      35            0 :         m_processor[0].setTargetCoefficients(IirBiquadFilter::createAllpass2P(0.2492, 2.168, 1.0));
      36            0 :         m_processor[1].setTargetCoefficients(IirBiquadFilter::createAllpass2P(0.1119, 2.033, 1.0));
      37            0 :         reset();
      38            0 :     }
      39              : 
      40            0 :     void reset()
      41              :     {
      42            0 :         for (auto& p : m_processor) {
      43            0 :             p.reset();
      44              :         }
      45            0 :     }
      46              : 
      47            0 :     void process(float** signalPtr, int numCh, int n)
      48              :     {
      49            0 :         for (auto& p : m_processor) {
      50            0 :             p.process(signalPtr, numCh, n);
      51              :         }
      52            0 :     }
      53              : 
      54              :     void processMonoSample(float& s)
      55              :     {
      56              :         for (auto& p : m_processor) {
      57              :             p.processMonoSample(s);
      58              :         }
      59              :     }
      60              : 
      61              :     void processStereoSample(float& l, float& r)
      62              :     {
      63              :         for (auto& p : m_processor) {
      64              :             p.processStereoSample(l, r);
      65              :         }
      66              :     }
      67              : 
      68              : private:
      69              :     std::array<IirBiquadFilter::DF1Processor<double>, 2> m_processor;
      70              : };
      71              : } // namespace muse::audio::fx
      72              : 
      73              : #endif // MUSE_AUDIO_ALLPASSDISPERSION_H