protected override void SetChannel(Channel channel)
{
if (channel == null)
{
throw new ArgumentNullException("channel");
}
ITuneRequest tuneRequest;
int hr = tuningSpace.CreateTuneRequest(out tuneRequest);
DsError.ThrowExceptionForHR(hr);
IATSCChannelTuneRequest atscRequest = (IATSCChannelTuneRequest)tuneRequest;
IATSCLocator locator = (IATSCLocator) new ATSCLocator();
locator.put_CarrierFrequency(channel.CarrierFrequency);
locator.put_PhysicalChannel(channel.PhysicalChannel);
atscRequest.put_Locator(locator);
atscRequest.put_Channel(channel.MajorChannel);
atscRequest.put_MinorChannel(channel.MinorChannel);
hr = tuner.put_TuneRequest(atscRequest);
DsError.ThrowExceptionForHR(hr);
ReleaseComObject(tuneRequest);
}
protected virtual void SetCurrentChannel(Channel channel)
{
if (channel == null)
{
throw new ArgumentNullException("channel");
}
if (this.State != GraphState.Running)
{
return;
}
ITuneRequest tuneRequest;
int hr = tuningSpace.CreateTuneRequest(out tuneRequest);
DsError.ThrowExceptionForHR(hr);
IATSCChannelTuneRequest atscRequest = (IATSCChannelTuneRequest)tuneRequest;
IATSCLocator locator = (IATSCLocator) new ATSCLocator();
locator.put_CarrierFrequency(channel.CarrierFrequency);
locator.put_PhysicalChannel(channel.PhysicalChannel);
atscRequest.put_Locator(locator);
atscRequest.put_Channel(channel.MajorChannel);
atscRequest.put_MinorChannel(channel.MinorChannel);
hr = tuner.put_TuneRequest(atscRequest);
DsError.ThrowExceptionForHR(hr);
ReleaseComObject(tuneRequest);
channelSet = true;
}
private bool BeforeTune(IChannel channel)
{
ATSCChannel atscChannel = channel as ATSCChannel;
if (atscChannel == null)
{
Log.Log.WriteFile("atsc:Channel is not a ATSC channel!!! {0}", channel.GetType().ToString());
return(false);
}
if (_graphState == GraphState.Idle)
{
BuildGraph();
}
if (useInternalNetworkProvider)
{
return(true);
}
if (_previousChannel == null || _previousChannel.IsDifferentTransponder(atscChannel))
{
Log.Log.WriteFile("atsc:using new channel tuning settings");
ITuneRequest request;
int hr = _tuningSpace.CreateTuneRequest(out request);
if (hr != 0)
{
Log.Log.WriteFile("atsc: Failed - CreateTuneRequest");
}
_tuneRequest = request;
IATSCChannelTuneRequest tuneRequest = (IATSCChannelTuneRequest)_tuneRequest;
ILocator locator;
hr = _tuningSpace.get_DefaultLocator(out locator);
if (hr != 0)
{
Log.Log.WriteFile("atsc: Failed - get_DefaultLocator");
}
IATSCLocator atscLocator = (IATSCLocator)locator;
hr = atscLocator.put_SymbolRate(-1);
if (hr != 0)
{
Log.Log.WriteFile("atsc: Failed - put_SymbolRate");
}
hr = atscLocator.put_TSID(-1);
if (hr != 0)
{
Log.Log.WriteFile("atsc: Failed - put_TSID");
}
hr = atscLocator.put_CarrierFrequency((int)atscChannel.Frequency);
if (hr != 0)
{
Log.Log.WriteFile("atsc: Failed - put_CarrierFrequency");
}
hr = atscLocator.put_Modulation(atscChannel.ModulationType);
if (hr != 0)
{
Log.Log.WriteFile("atsc: Failed - put_Modulation");
}
hr = tuneRequest.put_Channel(atscChannel.MajorChannel);
if (hr != 0)
{
Log.Log.WriteFile("atsc: Failed - put_Channel");
}
hr = tuneRequest.put_MinorChannel(atscChannel.MinorChannel);
if (hr != 0)
{
Log.Log.WriteFile("atsc: Failed - put_MinorChannel");
}
hr = atscLocator.put_PhysicalChannel(atscChannel.PhysicalChannel);
if (hr != 0)
{
Log.Log.WriteFile("atsc: Failed - put_PhysicalChannel");
}
hr = _tuneRequest.put_Locator(locator);
if (hr != 0)
{
Log.Log.WriteFile("atsc: Failed - put_Locator");
}
//set QAM paramters if necessary...
_conditionalAccess.CheckATSCQAM(atscChannel);
}
else
{
Log.Log.WriteFile("atsc:using previous channel tuning settings");
}
return(true);
}