/// <summary>
/// Initializes the target bitmap. Pass a null block to initialize with the default video properties.
/// </summary>
/// <param name="block">The block.</param>
private void InitializeTargetBitmap(VideoBlock block)
{
WPFUtils.UIInvoke(DispatcherPriority.Normal, () =>
{
var visual = PresentationSource.FromVisual(MediaElement);
var dpiX = 96.0 * visual?.CompositionTarget?.TransformToDevice.M11 ?? 96.0;
var dpiY = 96.0 * visual?.CompositionTarget?.TransformToDevice.M22 ?? 96.0;
var pixelWidth = block?.PixelWidth ?? MediaElement.NaturalVideoWidth;
var pixelHeight = block?.PixelHeight ?? MediaElement.NaturalVideoHeight;
if (MediaElement.HasVideo && pixelWidth > 0 && pixelHeight > 0)
{
TargetBitmap = new WriteableBitmap(
block?.PixelWidth ?? MediaElement.NaturalVideoWidth,
block?.PixelHeight ?? MediaElement.NaturalVideoHeight,
dpiX,
dpiY,
PixelFormats.Bgr24,
null);
}
else
{
TargetBitmap = null;
}
MediaElement.ViewBox.Source = TargetBitmap;
});
}
internal void RaiseMediaFailedEvent(Exception ex)
{
LogEventStart(MediaFailedEvent);
Logger.Log(MediaLogMessageType.Error, $"Media Failure - {ex?.GetType()}: {ex?.Message}");
WPFUtils.UIInvoke(DispatcherPriority.DataBind, () => { RaiseEvent(CreateExceptionRoutedEventArgs(MediaFailedEvent, this, ex)); });
LogEventDone(MediaFailedEvent);
}
/// <summary>
/// Executed when the Close method is called on the parent MediaElement
/// </summary>
public void Close()
{
WPFUtils.UIInvoke(DispatcherPriority.Render, () =>
{
TargetBitmap = null;
MediaElement.ViewBox.Source = null;
});
}
internal void RaiseMediaOpeningEvent()
{
LogEventStart(MediaOpeningEvent);
WPFUtils.UIInvoke(DispatcherPriority.DataBind, () =>
{
RaiseEvent(new MediaOpeningRoutedEventArgs(MediaOpeningEvent, this, mediaElementCore.Container.MediaOptions, mediaElementCore.Container.MediaInfo));
});
LogEventDone(MediaOpeningEvent);
}
/// <summary>
/// Initializes static members of the <see cref="MediaElement"/> class.
/// </summary>
static MediaElement()
{
var style = new Style(typeof(MediaElement), null);
style.Setters.Add(new Setter(FlowDirectionProperty, FlowDirection.LeftToRight));
style.Seal();
StyleProperty.OverrideMetadata(typeof(MediaElement), new FrameworkPropertyMetadata(style));
// Platform specific implementation
Platform.SetDllDirectory = NativeMethods.SetDllDirectory;
Platform.CopyMemory = NativeMethods.CopyMemory;
Platform.FillMemory = NativeMethods.FillMemory;
Platform.CreateTimer = (priority) =>
{
return(new CustomDispatcherTimer((DispatcherPriority)priority));
};
// Setup the Platform-specific factory callbacks
Platform.UIInvoke = (priority, action) => WPFUtils.UIInvoke((DispatcherPriority)priority, action);
Platform.UIEnqueueInvoke = (priority, action, args) => WPFUtils.UIEnqueueInvoke((DispatcherPriority)priority, action, args);
Platform.CreateRenderer = (mediaType, m) =>
{
if (mediaType == MediaType.Audio)
{
return(new AudioRenderer(m));
}
else if (mediaType == MediaType.Video)
{
return(new VideoRenderer(m));
}
else if (mediaType == MediaType.Subtitle)
{
return(new SubtitleRenderer(m));
}
throw new ArgumentException($"No suitable renderer for Media Type '{mediaType}'");
};
// Simply forward the calls
MediaElementCore.FFmpegMessageLogged += (o, e) => FFmpegMessageLogged?.Invoke(o, e);
}
/// <summary>
/// Initializes a new instance of the <see cref="AudioRenderer"/> class.
/// </summary>
/// <param name="mediaElementCore">The core media element.</param>
public AudioRenderer(MediaElementCore mediaElementCore)
{
MediaElementCore = mediaElementCore;
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.");
}
if (MediaElement.HasAudio)
{
Initialize();
}
if (Application.Current != null)
{
WPFUtils.UIInvoke(DispatcherPriority.Normal, () =>
{
Application.Current.Exit += OnApplicationExit;
});
}
}
private void RaiseMediaEndedEvent()
{
LogEventStart(MediaEndedEvent);
WPFUtils.UIInvoke(DispatcherPriority.DataBind, () => { RaiseEvent(new RoutedEventArgs(MediaEndedEvent, this)); });
LogEventDone(MediaEndedEvent);
}
