Method DisplayWaveform

src/Frame.cpp:268–298

Display the wave form

// Display the wave form
void Frame::DisplayWaveform()
{
	// Get audio wave form image
	GetWaveform(720, 480, 0, 123, 255, 255);

	if (!QApplication::instance()) {
		// Only create the QApplication once
		static int argc = 1;
		static char* argv[1] = {NULL};
		previewApp = std::make_shared<QApplication>(argc, argv);
	}

	// Create window
	QWidget previewWindow;
	previewWindow.setStyleSheet("background-color: #000000;");
	QHBoxLayout layout;

	// Create label with current frame's waveform image
	QLabel previewLabel;
	previewLabel.setPixmap(QPixmap::fromImage(*wave_image));
	previewLabel.setMask(QPixmap::fromImage(*wave_image).mask());
	layout.addWidget(&previewLabel);

	// Show the window
	previewWindow.setLayout(&layout);
	previewWindow.show();
	previewApp->exec();

	// Deallocate waveform image
	ClearWaveform();
}

// Get magnitude of range of samples (if channel is -1, return average of all channels for that sample)
float Frame::GetAudioSample(int channel, int sample, int magnitude_range)