public WaveView()
{
// event gets triggered when ActualWidth or ActualHeight change
SizeChanged += WaveView_SizeChanged;
// init renderers
// NOTE assume that 2 channels will be the maximum for now - increase if needed
waveformBitmapRenderers = new WaveformBitmapRenderer[2];
for (int i = 0; i < waveformBitmapRenderers.Length; i++)
{
waveformBitmapRenderers[i] = new WaveformBitmapRenderer();
}
waveformGeometryRenderers = new WaveformGeometryRenderer[2];
for (int i = 0; i < waveformGeometryRenderers.Length; i++)
{
waveformGeometryRenderers[i] = new WaveformGeometryRenderer();
}
DependencyPropertyDescriptor.FromProperty(Selector.IsSelectedProperty, typeof(WaveView))
.AddValueChanged(this, new EventHandler(OnSelectionChanged));
_lineBrush = WaveformLine;
_backgroundBrush = WaveformBackground;
// Free all references to the audio track and stream when the control gets unloaded
Unloaded += delegate(object o, RoutedEventArgs e) {
UnsetAudioTrack();
};
}
private void SetAudioTrack(AudioTrack audioTrack)
{
UnsetAudioTrack();
// init renderers
waveformBitmapRenderers = new WaveformBitmapRenderer[audioTrack.SourceProperties.Channels];
for (int i = 0; i < waveformBitmapRenderers.Length; i++)
{
waveformBitmapRenderers[i] = new WaveformBitmapRenderer();
}
waveformGeometryRenderers = new WaveformGeometryRenderer[audioTrack.SourceProperties.Channels];
for (int i = 0; i < waveformGeometryRenderers.Length; i++)
{
waveformGeometryRenderers[i] = new WaveformGeometryRenderer();
}
this.audioTrack = audioTrack;
audioStream = AudioStreamFactory.FromAudioTrackForGUI(audioTrack);
audioStream.WaveformChanged += OnAudioStreamWaveformChanged;
audioTrack.LengthChanged += OnAudioTrackLengthChanged;
audioTrack.VolumeChanged += OnAudioTrackVolumeChanged;
audioTrack.BalanceChanged += OnAudioTrackBalanceChanged;
}