// Retrieve capabilities of a video device
static internal VideoCapabilities[] FromStreamConfig(IAMStreamConfig videoStreamConfig)
{
if (videoStreamConfig == null)
{
throw new ArgumentNullException("videoStreamConfig");
}
// ensure this device reports capabilities
int count, size;
int hr = videoStreamConfig.GetNumberOfCapabilities(out count, out size);
if (hr != 0)
{
Marshal.ThrowExceptionForHR(hr);
}
if (count <= 0)
{
throw new NotSupportedException("This video device does not report capabilities.");
}
if (size > Marshal.SizeOf(typeof(VideoStreamConfigCaps)))
{
throw new NotSupportedException("Unable to retrieve video device capabilities. This video device requires a larger VideoStreamConfigCaps structure.");
}
// group capabilities with similar parameters
Dictionary <uint, VideoCapabilities> videocapsList = new Dictionary <uint, VideoCapabilities>( );
for (int i = 0; i < count; i++)
{
try
{
VideoCapabilities vc = new VideoCapabilities(videoStreamConfig, i);
uint key = (((uint)vc.FrameSize.Height) << 32) |
(((uint)vc.FrameSize.Width) << 16);
if (!videocapsList.ContainsKey(key))
{
videocapsList.Add(key, vc);
}
else
{
if (vc.BitCount > videocapsList[key].BitCount)
{
videocapsList[key] = vc;
}
}
}
catch
{
}
}
VideoCapabilities[] videocaps = new VideoCapabilities[videocapsList.Count];
videocapsList.Values.CopyTo(videocaps, 0);
return(videocaps);
}
/// <summary>
/// Check if two video capabilities are equal.
/// </summary>
///
/// <param name="vc2">Second video capability to compare with.</param>
///
/// <returns>Returns true if both video capabilities are equal or false otherwise.</returns>
///
public bool Equals(VideoCapabilities vc2)
{
if ((object)vc2 == null)
{
return(false);
}
return((FrameSize == vc2.FrameSize) && (BitCount == vc2.BitCount));
}
