59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
#include "effects/effects.h"
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#include <QGridLayout>
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#include <QLabel>
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#include <QDebug>
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#include "ui/labelslider.h"
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#include "ui/collapsiblewidget.h"
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VolumeEffect::VolumeEffect(Clip* c) : Effect(c) {
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setup_effect(EFFECT_TYPE_AUDIO, AUDIO_VOLUME_EFFECT);
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QGridLayout* ui_layout = new QGridLayout();
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ui_layout->addWidget(new QLabel("Volume:"), 0, 0);
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volume_val = new LabelSlider();
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volume_val->set_minimum_value(0);
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volume_val->set_maximum_value(400);
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ui_layout->addWidget(volume_val, 0, 1);
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ui->setLayout(ui_layout);
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container->setContents(ui);
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// set defaults
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volume_val->set_value(100);
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}
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Effect* VolumeEffect::copy(Clip* c) {
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VolumeEffect* v = new VolumeEffect(c);
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v->volume_val->set_value(volume_val->value());
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return v;
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}
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void VolumeEffect::load(QXmlStreamReader* stream) {
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while (!(stream->isEndElement() && stream->name() == "effect") && !stream->atEnd()) {
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stream->readNext();
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if (stream->isStartElement() && stream->name() == "volume") {
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stream->readNext();
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volume_val->set_value(stream->text().toFloat());
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}
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}
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}
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void VolumeEffect::save(QXmlStreamWriter* stream) {
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stream->writeTextElement("volume", QString::number(volume_val->value()));
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}
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void VolumeEffect::process_audio(quint8* samples, int nb_bytes) {
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if (volume_val->value() != 0) {
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for (int i=0;i<nb_bytes;i+=2) {
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qint16 samp = (qint16) ((samples[i+1] << 8) | samples[i]);
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samp *= (volume_val->value()*0.01f);
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samples[i+1] = (quint8) (samp >> 8);
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samples[i] = (quint8) samp;
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}
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}
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}
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