/// <summary>
/// Executed when the Close method is called on the parent MediaElement
/// </summary>
public void Close()
{
MediaElement.InvokeOnUI(() =>
{
if (TargetBitmap == null)
{
return;
}
TargetBitmap = null;
MediaElement.ViewBox.Source = TargetBitmap;
});
}
/// <summary>
/// Destroys the audio renderer.
/// Makes it useless.
/// </summary>
private void Destroy()
{
try
{
// Remove the event handler
if (Application.Current != null)
{
MediaElement.InvokeOnUI(() =>
{
Application.Current.Exit -= OnApplicationExit;
});
}
}
catch { }
if (AudioDevice != null)
{
AudioDevice.Stop();
AudioDevice.Dispose();
AudioDevice = null;
}
if (AudioBuffer != null)
{
AudioBuffer.Dispose();
AudioBuffer = null;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="AudioRenderer"/> class.
/// </summary>
/// <param name="mediaElement">The media element.</param>
public AudioRenderer(MediaElement mediaElement)
{
MediaElement = mediaElement;
m_Format = new WaveFormat(AudioParams.Output.SampleRate, AudioParams.OutputBitsPerSample, AudioParams.Output.ChannelCount);
if (WaveFormat.BitsPerSample != 16 || WaveFormat.Channels != 2)
{
throw new NotSupportedException("Wave Format has to be 16-bit and 2-channel.");
}
BytesPerSample = WaveFormat.BitsPerSample / 8;
SilenceBuffer = new byte[m_Format.BitsPerSample / 8 * m_Format.Channels * 2];
if (MediaElement.HasAudio)
{
Initialize();
}
if (Application.Current != null)
{
MediaElement.InvokeOnUI(() =>
{
Application.Current.Exit += OnApplicationExit;
});
}
}
/// <summary>
/// Renders the specified media block.
/// </summary>
/// <param name="mediaBlock">The media block.</param>
/// <param name="clockPosition">The clock position.</param>
/// <param name="renderIndex">Index of the render.</param>
public void Render(MediaBlock mediaBlock, TimeSpan clockPosition, int renderIndex)
{
var block = mediaBlock as VideoBlock;
if (block == null)
{
return;
}
MediaElement.InvokeOnUI(() => {
var updateRect = new Int32Rect(0, 0, block.PixelWidth, block.PixelHeight);
TargetBitmap.WritePixels(updateRect, block.Buffer, block.BufferLength, block.BufferStride);
});
}
