/// <summary>
/// Populate the internal InnerList with sources/physical connectors
/// found on the crossbars. Each instance of this class is limited
/// to video only or audio only sources ( specified by the isVideoDevice
/// parameter on the constructor) so we check each source before adding
/// it to the list.
/// </summary>
/// <param name="graphBuilder">The capture graph</param>
/// <param name="crossbar">The cross bar</param>
/// <param name="isVideoDevice">Is video device</param>
/// <returns>The cross bars list</returns>
private ArrayList FindCrossbarSources(ICaptureGraphBuilder2 graphBuilder, IAMCrossbar crossbar, bool isVideoDevice)
{
ArrayList sources = new ArrayList();
int hr;
int numOutPins;
int numInPins;
hr = crossbar.get_PinCounts(out numOutPins, out numInPins);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// We loop through every combination of output and input pin
// to see which combinations match.
// Loop through output pins
for (int cOut = 0; cOut < numOutPins; cOut++)
{
// Loop through input pins
for (int cIn = 0; cIn < numInPins; cIn++)
{
// Can this combination be routed?
hr = crossbar.CanRoute(cOut, cIn);
if (hr == 0)
{
// Yes, this can be routed
int relatedPin;
PhysicalConnectorType connectorType;
hr = crossbar.get_CrossbarPinInfo(true, cIn, out relatedPin, out connectorType);
if (hr < 0)
{
Marshal.ThrowExceptionForHR(hr);
}
// Is this the correct type?, If so add to the InnerList
CrossbarSource source = new CrossbarSource(crossbar, cOut, cIn, connectorType);
if (connectorType < PhysicalConnectorType.Audio_Tuner)
{
if (isVideoDevice)
{
sources.Add(source);
}
else
if (!isVideoDevice)
{
sources.Add(source);
}
}
}
}
}
// Some silly drivers (*cough* Nvidia *cough*) add crossbars
// with no real choices. Every input can only be routed to
// one output. Loop through every Source and see if there
// at least one other Source with the same output pin.
int refIndex = 0;
while (refIndex < sources.Count)
{
bool found = false;
CrossbarSource refSource = (CrossbarSource)sources[refIndex];
for (int c = 0; c < sources.Count; c++)
{
CrossbarSource s = (CrossbarSource)sources[c];
if ((refSource.OutputPin == s.OutputPin) && (refIndex != c))
{
found = true;
break;
}
}
if (found)
{
refIndex++;
}
else
{
sources.RemoveAt(refIndex);
}
}
return(sources);
}
/// <summary>
/// Populate the collection by looking for commonly implemented property pages
/// </summary>
/// <param name="graphBuilder"></param>
/// <param name="videoDeviceFilter"></param>
/// <param name="audioDeviceFilter"></param>
/// <param name="videoCompressorFilter"></param>
/// <param name="audioCompressorFilter"></param>
/// <param name="videoSources"></param>
/// <param name="audioSources"></param>
protected void addFromGraph(
ICaptureGraphBuilder2 graphBuilder,
IBaseFilter videoDeviceFilter, IBaseFilter audioDeviceFilter,
IBaseFilter videoCompressorFilter, IBaseFilter audioCompressorFilter,
SourceCollection videoSources, SourceCollection audioSources)
{
object filter = null;
Guid cat;
Guid med;
Guid iid;
int hr;
// 1. the video capture filter
addIfSupported(videoDeviceFilter, "Video Capture Device");
// 2. the video capture pin
cat = PinCategory.Capture;
med = MediaType.Interleaved;
iid = typeof(IAMStreamConfig).GUID;
hr = graphBuilder.FindInterface(
cat, med, videoDeviceFilter, iid, out filter);
if (hr != 0)
{
med = MediaType.Video;
hr = graphBuilder.FindInterface(
cat, med, videoDeviceFilter, iid, out filter);
if (hr != 0)
{
filter = null;
}
}
addIfSupported(filter, "Video Capture Pin");
// 3. the video preview pin
cat = PinCategory.Preview;
med = MediaType.Interleaved;
iid = typeof(IAMStreamConfig).GUID;
hr = graphBuilder.FindInterface(
cat, med, videoDeviceFilter, iid, out filter);
if (hr != 0)
{
med = MediaType.Video;
hr = graphBuilder.FindInterface(
cat, med, videoDeviceFilter, iid, out filter);
if (hr != 0)
{
filter = null;
}
}
addIfSupported(filter, "Video Preview Pin");
// 4. the video crossbar(s)
ArrayList crossbars = new ArrayList();
int num = 1;
for (int c = 0; c < videoSources.Count; c++)
{
CrossbarSource s = videoSources[c] as CrossbarSource;
if (s != null)
{
if (crossbars.IndexOf(s.Crossbar) < 0)
{
crossbars.Add(s.Crossbar);
if (addIfSupported(s.Crossbar, "Video Crossbar " + (num == 1 ? "" : num.ToString())))
{
num++;
}
}
}
}
crossbars.Clear();
// 5. the video compressor
addIfSupported(videoCompressorFilter, "Video Compressor");
// 6. the video TV tuner
cat = PinCategory.Capture;
med = MediaType.Interleaved;
iid = typeof(IAMTVTuner).GUID;
hr = graphBuilder.FindInterface(
cat, med, videoDeviceFilter, iid, out filter);
if (hr != 0)
{
med = MediaType.Video;
hr = graphBuilder.FindInterface(
cat, med, videoDeviceFilter, iid, out filter);
if (hr != 0)
{
filter = null;
}
}
addIfSupported(filter, "TV Tuner");
// 7. the video compressor (VFW)
IAMVfwCompressDialogs compressDialog = videoCompressorFilter as IAMVfwCompressDialogs;
if (compressDialog != null)
{
VfwCompressorPropertyPage page = new VfwCompressorPropertyPage("Video Compressor", compressDialog);
InnerList.Add(page);
}
// 8. the audio capture filter
addIfSupported(audioDeviceFilter, "Audio Capture Device");
// 9. the audio capture pin
cat = PinCategory.Capture;
med = MediaType.Audio;
iid = typeof(IAMStreamConfig).GUID;
hr = graphBuilder.FindInterface(
cat, med, audioDeviceFilter, iid, out filter);
if (hr != 0)
{
filter = null;
}
addIfSupported(filter, "Audio Capture Pin");
// 9. the audio preview pin
cat = PinCategory.Preview;
med = MediaType.Audio;
iid = typeof(IAMStreamConfig).GUID;
hr = graphBuilder.FindInterface(
cat, med, audioDeviceFilter, iid, out filter);
if (hr != 0)
{
filter = null;
}
addIfSupported(filter, "Audio Preview Pin");
// 10. the audio crossbar(s)
num = 1;
for (int c = 0; c < audioSources.Count; c++)
{
CrossbarSource s = audioSources[c] as CrossbarSource;
if (s != null)
{
if (crossbars.IndexOf(s.Crossbar) < 0)
{
crossbars.Add(s.Crossbar);
if (addIfSupported(s.Crossbar, "Audio Crossbar " + (num == 1 ? "" : num.ToString())))
{
num++;
}
}
}
}
crossbars.Clear();
// 11. the audio compressor
addIfSupported(audioCompressorFilter, "Audio Compressor");
}