public void Write(BinaryWriter writer, string message = null)
{
writer.Write(nameof(OverlayInfo).GetHashCode());
writer.Write(message ?? string.Empty);
writer.Write(KeyFrame);
format.WriteFrame(writer, this);
}
public OverlayInfo this[int frameNumber]
{
get
{
lock (stream)
{
if (stream.Length == 0)
{
return(null);
}
CheckHeader();
stream.Position = 1 + format.FrameSize * frameNumber;
if (stream.Position >= stream.Length)
{
return(null);
}
return(format.ReadFrame(reader));
}
}
set
{
lock (stream)
{
WriteHeader();
stream.Position = 1 + format.FrameSize * frameNumber;
var writer = new BinaryWriter(stream);
if (value == null)
{
writer.Write(0);
}
else
{
value.FrameNumber = frameNumber;
format.WriteFrame(writer, value);
}
writer.Flush();
}
}
}
public void ToFrame(VideoFrame frame)
{
unsafe
{
using (var stream = new UnmanagedMemoryStream((byte *)frame.GetWritePtr().ToPointer(),
frame.GetRowSize(), frame.GetRowSize(), FileAccess.Write))
using (var writer = new BinaryWriter(stream))
{
writer.Write(nameof(OverlayInfo));
format.WriteFrame(writer, this);
}
}
}