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#include "volumeeffect.h"
#include <QGridLayout>
#include <QLabel>
#include <QtMath>
#include <stdint.h>
#include "ui/labelslider.h"
#include "ui/collapsiblewidget.h"
VolumeEffect::VolumeEffect(Clip* c, const EffectMeta *em) : Effect(c, em) {
EffectRow* volume_row = add_row("Volume:");
volume_val = volume_row->add_field(EFFECT_FIELD_DOUBLE, "volume");
volume_val->set_double_minimum_value(0);
// set defaults
volume_val->set_double_default_value(100);
}
void VolumeEffect::process_audio(double timecode_start, double timecode_end, quint8* samples, int nb_bytes, int) {
double interval = (timecode_end-timecode_start)/nb_bytes;
for (int i=0;i<nb_bytes;i+=2) {
double vol_val = log_volume(volume_val->get_double_value(timecode_start+(interval*i), true)*0.01);
qint32 samp = (qint16) (((samples[i+1] & 0xFF) << 8) | (samples[i] & 0xFF));
samp *= vol_val;
if (samp > INT16_MAX) {
samp = INT16_MAX;
} else if (samp < INT16_MIN) {
samp = INT16_MIN;
}
samples[i+1] = (quint8) (samp >> 8);
samples[i] = (quint8) samp;
}
}
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