/// <summary>
/// Called by vlc when the video format is needed. This method allocats the picture buffers for vlc and tells it to set the chroma to RV32
/// </summary>
/// <param name="userdata">The user data that will be given to the <see cref="LockVideo"/> callback. It contains the pointer to the buffer</param>
/// <param name="chroma">The chroma</param>
/// <param name="width">The visible width</param>
/// <param name="height">The visible height</param>
/// <param name="pitches">The buffer width</param>
/// <param name="lines">The buffer height</param>
/// <returns>The number of buffers allocated</returns>
private uint VideoFormat(out IntPtr userdata, IntPtr chroma, ref uint width, ref uint height, ref uint pitches, ref uint lines)
{
var pixelFormat = IsAlphaChannelEnabled ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
FourCCConverter.ToFourCC("RV32", chroma);
pitches = this.GetAlignedDimension((uint)(width * pixelFormat.BitsPerPixel) / 8, 32);
lines = this.GetAlignedDimension(height, 32);
var size = pitches * lines;
#if NET45
this.memoryMappedFile = MemoryMappedFile.CreateNew(null, size);
var handle = this.memoryMappedFile.SafeMemoryMappedFileHandle.DangerousGetHandle();
#else
this.memoryMappedFile = Win32Interop.CreateFileMapping(new IntPtr(-1), IntPtr.Zero,
Win32Interop.PageAccess.ReadWrite, 0, (int)size, null);
var handle = this.memoryMappedFile;
#endif
var args = new
{
width = width,
height = height,
pixelFormat = pixelFormat,
pitches = pitches
};
this.dispatcher.Invoke((Action)(() =>
{
this.VideoSource = (InteropBitmap)Imaging.CreateBitmapSourceFromMemorySection(handle,
(int)args.width, (int)args.height, args.pixelFormat, (int)args.pitches, 0);
}));
#if NET45
this.memoryMappedView = this.memoryMappedFile.CreateViewAccessor();
var viewHandle = this.memoryMappedView.SafeMemoryMappedViewHandle.DangerousGetHandle();
#else
this.memoryMappedView = Win32Interop.MapViewOfFile(this.memoryMappedFile, Win32Interop.FileMapAccess.AllAccess, 0, 0, size);
var viewHandle = this.memoryMappedView;
#endif
userdata = viewHandle;
return(1);
}
/// <summary>
/// Removes the video (must be called from the Dispatcher thread)
/// </summary>
private void RemoveVideo()
{
this.VideoSource = null;
#if NET45
this.memoryMappedView?.Dispose();
this.memoryMappedView = null;
this.memoryMappedFile?.Dispose();
this.memoryMappedFile = null;
#else
if (this.memoryMappedFile != IntPtr.Zero)
{
Win32Interop.UnmapViewOfFile(this.memoryMappedView);
this.memoryMappedView = IntPtr.Zero;
Win32Interop.CloseHandle(this.memoryMappedFile);
this.memoryMappedFile = IntPtr.Zero;
}
#endif
}
private uint VideoSetFormat(ref IntPtr opaque, ref uint chroma, ref uint width, ref uint height, ref uint pitches, ref uint lines)
{
var context = new VlcControlWpfRendererContext(width, height, PixelFormats.Bgr32);
chroma = BitConverter.ToUInt32(new[] { (byte)'R', (byte)'V', (byte)'3', (byte)'2' }, 0);
width = (uint)context.Width;
height = (uint)context.Height;
pitches = (uint)context.Stride;
lines = (uint)context.Height;
myBitmapSectionPointer = Win32Interop.CreateFileMapping(new IntPtr(-1), IntPtr.Zero, Win32Interop.PageAccess.ReadWrite, 0, context.Size, null);
opaque = Win32Interop.MapViewOfFile(myBitmapSectionPointer, Win32Interop.FileMapAccess.AllAccess, 0, 0, (uint)context.Size);
Dispatcher.Invoke((Action)(() =>
{
myBitmap = (InteropBitmap)Imaging.CreateBitmapSourceFromMemorySection(myBitmapSectionPointer, context.Width, context.Height, context.PixelFormat, context.Stride, 0);
VideoSource = myBitmap;
VideoBrush.ImageSource = myBitmap;
}));
return(1);
}
private void VideoCleanup(IntPtr opaque)
{
myBitmap = null;
Win32Interop.UnmapViewOfFile(opaque);
Win32Interop.CloseHandle(myBitmapSectionPointer);
}
/// <summary>
/// Called by vlc when the video format is needed. This method allocats the picture buffers for vlc and tells it to set the chroma to RV32
/// </summary>
/// <param name="userdata">The user data that will be given to the <see cref="LockVideo"/> callback. It contains the pointer to the buffer</param>
/// <param name="chroma">The chroma</param>
/// <param name="width">The visible width</param>
/// <param name="height">The visible height</param>
/// <param name="pitches">The buffer width</param>
/// <param name="lines">The buffer height</param>
/// <returns>The number of buffers allocated</returns>
private uint VideoFormat(out IntPtr userdata, IntPtr chroma, ref uint width, ref uint height, ref uint pitches, ref uint lines)
{
var pixelFormat = IsAlphaChannelEnabled ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
FourCCConverter.ToFourCC("RV32", chroma);
//Correct video width and height according to TrackInfo
var md = MediaPlayer.GetMedia();
foreach (MediaTrack track in md.Tracks)
{
if (track.Type == MediaTrackTypes.Video)
{
var trackInfo = (VideoTrack)track.TrackInfo;
if (trackInfo.Width > 0 && trackInfo.Height > 0)
{
width = trackInfo.Width;
height = trackInfo.Height;
if (trackInfo.SarDen != 0)
{
width = width * trackInfo.SarNum / trackInfo.SarDen;
}
}
break;
}
}
pitches = this.GetAlignedDimension((uint)(width * pixelFormat.BitsPerPixel) / 8, 32);
lines = this.GetAlignedDimension(height, 32);
var size = pitches * lines;
#if NET45
this.memoryMappedFile = MemoryMappedFile.CreateNew(null, size);
var handle = this.memoryMappedFile.SafeMemoryMappedFileHandle.DangerousGetHandle();
#else
this.memoryMappedFile = Win32Interop.CreateFileMapping(new IntPtr(-1), IntPtr.Zero,
Win32Interop.PageAccess.ReadWrite, 0, (int)size, null);
var handle = this.memoryMappedFile;
#endif
var args = new
{
width = width,
height = height,
pixelFormat = pixelFormat,
pitches = pitches
};
this.dispatcher.Invoke((Action)(() =>
{
this.VideoSource = (InteropBitmap)Imaging.CreateBitmapSourceFromMemorySection(handle,
(int)args.width, (int)args.height, args.pixelFormat, (int)args.pitches, 0);
}));
#if NET45
this.memoryMappedView = this.memoryMappedFile.CreateViewAccessor();
var viewHandle = this.memoryMappedView.SafeMemoryMappedViewHandle.DangerousGetHandle();
#else
this.memoryMappedView = Win32Interop.MapViewOfFile(this.memoryMappedFile, Win32Interop.FileMapAccess.AllAccess, 0, 0, size);
var viewHandle = this.memoryMappedView;
#endif
userdata = viewHandle;
return(1);
}
