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_SMOOTHGAIN_H
      24              : #define MUSE_AUDIO_SMOOTHGAIN_H
      25              : 
      26              : #include "audio/engine/internal/dsp/smoothlinearvalue.h"
      27              : #include "vectorops.h"
      28              : 
      29              : namespace muse::audio::fx {
      30              : /// helper logic to apply gain ramps to blocks of audio
      31            0 : inline void apply_smooth_gain(dsp::SmoothLinearValue<float>& smooth_value, float** s_in, float** s_out,
      32              :                               int num_channels, int num_s)
      33              : {
      34            0 :     if (smooth_value.isAtTargetValue()) {
      35            0 :         for (int ch = 0; ch < num_channels; ++ch) {
      36            0 :             vo::constantMultiply(s_in[ch], smooth_value.getTargetValue(), s_out[ch], num_s);
      37              :         }
      38              :     } else {
      39            0 :         for (int i = 0; i < num_s; ++i) {
      40            0 :             for (int ch = 0; ch < num_channels; ++ch) {
      41            0 :                 s_out[ch][i] = s_in[ch][i] * smooth_value.getValue();
      42              :             }
      43            0 :             smooth_value.tick();
      44              :         }
      45              :     }
      46            0 : }
      47              : } // namespace muse::audio::fx
      48              : 
      49              : #endif // MUSE_AUDIO_SMOOTHGAIN_H