70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "volumeeffect.h"
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#include <QGridLayout>
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#include <QLabel>
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#include <QtMath>
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#include <stdint.h>
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#include "ui/labelslider.h"
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#include "ui/collapsiblewidget.h"
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VolumeEffect::VolumeEffect(Clip* c, const EffectMeta *em) : Effect(c, em) {
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EffectRow* volume_row = add_row(tr("Volume"));
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volume_val = volume_row->add_field(EFFECT_FIELD_DOUBLE, "volume");
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// set defaults
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volume_val->set_double_default_value(1);
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static_cast<LabelSlider*>(volume_val->get_ui_element())->set_display_type(LABELSLIDER_DECIBEL);
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}
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void VolumeEffect::process_audio(double timecode_start, double timecode_end, quint8* samples, int nb_bytes, int) {
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double interval = (timecode_end-timecode_start)/nb_bytes;
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for (int i=0;i<nb_bytes;i+=4) {
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// double vol_val = log_volume(volume_val->get_double_value(timecode_start+(interval*i), true));
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double vol_val = volume_val->get_double_value(timecode_start+(interval*i), true);
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qint32 right_samp = qint16(((samples[i+3] & 0xFF) << 8) | (samples[i+2] & 0xFF));
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qint32 left_samp = qint16(((samples[i+1] & 0xFF) << 8) | (samples[i] & 0xFF));
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left_samp *= vol_val;
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right_samp *= vol_val;
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if (left_samp > INT16_MAX) {
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left_samp = INT16_MAX;
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} else if (left_samp < INT16_MIN) {
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left_samp = INT16_MIN;
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}
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if (right_samp > INT16_MAX) {
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right_samp = INT16_MAX;
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} else if (right_samp < INT16_MIN) {
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right_samp = INT16_MIN;
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}
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samples[i+3] = (quint8) (right_samp >> 8);
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samples[i+2] = (quint8) right_samp;
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samples[i+1] = (quint8) (left_samp >> 8);
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samples[i] = (quint8) left_samp;
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}
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}
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