//-------------------------------------------------------------------
// SetDevice
//
// Set up preview for a specified video capture device.
//-------------------------------------------------------------------
public int SetDevice(MfDevice pDevice, ref string format)
{
int hr;
IMFMediaSource pSource = null;
lock (LockSync)
{
try
{
// Release the current device, if any.
hr = CloseDevice();
pActivate = pDevice.Activator;
object o = null;
if (Succeeded(hr))
{
// Create the media source for the device.
hr = pActivate.ActivateObject(typeof(IMFMediaSource).GUID, out o);
}
if (Succeeded(hr))
{
pSource = (IMFMediaSource)o;
}
// Get Symbolic device link
PwszSymbolicLink = pDevice.SymbolicName;
// Create the source reader.
if (Succeeded(hr))
{
hr = OpenMediaSource(pSource, ref PReader);
}
if (Succeeded(hr))
{
var index = GetOptimizedFormatIndex(ref format);
if (index >= 0)
{
hr = ConfigureSourceReader(index);
}
}
if (Failed(hr))
{
pSource?.Shutdown();
//pActivate.ShutdownObject();
// NOTE: The source reader shuts down the media source
// by default, but we might not have gotten that far.
CloseDevice();
}
}
finally
{
SafeRelease(pSource);
}
}
return(hr);
}
private void OnActivate(IDeviceInfo moniker)
{
activeDevice = moniker as MfDevice;
var format = string.Empty;
var hr = camProcess.SetDevice(activeDevice, ref format);
if (!string.IsNullOrEmpty(format))
{
eventAggregator.GetEvent <NoticeFormatEvent>().Publish(format);
}
MFError.ThrowExceptionForHR(hr);
}
private void OnActivate(IDeviceInfo moniker)
{
activeDevice = moniker as MfDevice;
var format = string.Empty;
var hr = camProcess.SetDevice(activeDevice, ref format);
if (!string.IsNullOrEmpty(format))
eventAggregator.GetEvent<NoticeFormatEvent>().Publish(format);
MFError.ThrowExceptionForHR(hr);
}
public MonikerProvider()
{
// Query MF for the devices
DeviceTable = MfDevice.GetCategoryDevices(CLSID.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID);
}
//-------------------------------------------------------------------
// SetDevice
//
// Set up preview for a specified video capture device.
//-------------------------------------------------------------------
public int SetDevice(MfDevice pDevice, ref string format)
{
int hr;
IMFMediaSource pSource = null;
lock (LockSync)
{
try
{
// Release the current device, if any.
hr = CloseDevice();
pActivate = pDevice.Activator;
object o = null;
if (Succeeded(hr))
{
// Create the media source for the device.
hr = pActivate.ActivateObject(typeof(IMFMediaSource).GUID, out o);
}
if (Succeeded(hr))
{
pSource = (IMFMediaSource)o;
}
// Get Symbolic device link
PwszSymbolicLink = pDevice.SymbolicName;
// Create the source reader.
if (Succeeded(hr))
{
hr = OpenMediaSource(pSource, ref PReader);
}
if (Succeeded(hr))
{
var index = GetOptimizedFormatIndex(ref format);
if (index>=0)
hr = ConfigureSourceReader(index);
}
if (Failed(hr))
{
pSource?.Shutdown();
//pActivate.ShutdownObject();
// NOTE: The source reader shuts down the media source
// by default, but we might not have gotten that far.
CloseDevice();
}
}
finally
{
SafeRelease(pSource);
}
}
return hr;
}