static internal VideoCapabilities[] FromStreamConfig(IAMStreamConfig videoStreamConfig)
{
if (videoStreamConfig == null)
{
throw new ArgumentNullException("videoStreamConfig");
}
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.");
}
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);
}
public bool Equals(VideoCapabilities vc2)
{
if ((object)vc2 == null)
{
return(false);
}
return((FrameSize == vc2.FrameSize) && (BitCount == vc2.BitCount));
}
private void GetPinCapabilitiesAndConfigureSizeAndRate(ICaptureGraphBuilder2 graphBuilder, IBaseFilter baseFilter,
Guid pinCategory, VideoCapabilities resolutionToSet, ref VideoCapabilities[] capabilities)
{
object streamConfigObject;
graphBuilder.FindInterface(pinCategory, MediaType.Video, baseFilter, typeof(IAMStreamConfig).GUID, out streamConfigObject);
if (streamConfigObject != null)
{
IAMStreamConfig streamConfig = null;
try
{
streamConfig = (IAMStreamConfig)streamConfigObject;
}
catch (InvalidCastException)
{
}
if (streamConfig != null)
{
if (capabilities == null)
{
try
{
capabilities = MotionDetector.Video.DirectShow.VideoCapabilities.FromStreamConfig(streamConfig);
}
catch
{
}
}
if (resolutionToSet != null)
{
SetResolution(streamConfig, resolutionToSet);
}
}
}
if (capabilities == null)
{
capabilities = new VideoCapabilities[0];
}
}
private void SetResolution(IAMStreamConfig streamConfig, VideoCapabilities resolution)
{
if (resolution == null)
{
return;
}
int capabilitiesCount = 0, capabilitySize = 0;
AMMediaType newMediaType = null;
VideoStreamConfigCaps caps = new VideoStreamConfigCaps( );
streamConfig.GetNumberOfCapabilities(out capabilitiesCount, out capabilitySize);
for (int i = 0; i < capabilitiesCount; i++)
{
try
{
VideoCapabilities vc = new VideoCapabilities(streamConfig, i);
if (resolution == vc)
{
if (streamConfig.GetStreamCaps(i, out newMediaType, caps) == 0)
{
break;
}
}
}
catch
{
}
}
if (newMediaType != null)
{
streamConfig.SetFormat(newMediaType);
newMediaType.Dispose( );
}
}
