First commit of brand new rewrite

effects/volumeeffect.cpp

@@ -0,0 +1,38 @@
+#include "effects/effects.h"
+
+#include <QGridLayout>
+#include <QSpinBox>
+#include <QLabel>
+
+#include "ui/collapsiblewidget.h"
+
+VolumeEffect::VolumeEffect(Clip* c) : Effect(c) {
+	container = new CollapsibleWidget();
+	container->setText(audio_effect_names[AUDIO_VOLUME_EFFECT]);
+
+	ui = new QWidget();
+
+	QGridLayout* ui_layout = new QGridLayout();
+
+	ui_layout->addWidget(new QLabel("Volume:"), 0, 0);
+	volume_val = new QSpinBox();
+	volume_val->setMinimum(0);
+	volume_val->setMaximum(100);
+	ui_layout->addWidget(volume_val, 0, 1);
+
+	ui->setLayout(ui_layout);
+
+	container->setContents(ui);
+
+	// set defaults
+	volume_val->setValue(100);
+}
+
+void VolumeEffect::process_audio(uint8_t *samples, int nb_bytes) {
+	for (int i=0;i<nb_bytes;i+=2) {
+		int16_t full_sample = (int16_t) ((samples[i+1] << 8) | samples[i]);
+		full_sample *= volume_val->value()*0.01;
+		samples[i+1] = (uint8_t) (full_sample >> 8);
+		samples[i] = (uint8_t) full_sample;
+	}
+}