/// <summary>
/// Builds the directshow graph for this analog tvcard
/// </summary>
public override void BuildGraph()
{
if (_cardId == 0)
{
GetPreloadBitAndCardId();
_configuration = Configuration.readConfiguration(_cardId, _name, _devicePath);
Configuration.writeConfiguration(_configuration);
}
_lastSignalUpdate = DateTime.MinValue;
_tunerLocked = false;
Log.Log.WriteFile("analog: build graph");
try
{
if (_graphState != GraphState.Idle)
{
Log.Log.WriteFile("analog: Graph already build");
throw new TvException("Graph already build");
}
//create a new filter graph
_graphBuilder = (IFilterGraph2) new FilterGraph();
_rotEntry = new DsROTEntry(_graphBuilder);
_capBuilder = (ICaptureGraphBuilder2) new CaptureGraphBuilder2();
_capBuilder.SetFiltergraph(_graphBuilder);
Graph graph = _configuration.Graph;
_tuner = new Tuner(_device);
if (!_tuner.CreateFilterInstance(graph, _graphBuilder))
{
Log.Log.Error("analog: unable to add tv tuner filter");
throw new TvException("Analog: unable to add tv tuner filter");
}
_minChannel = _tuner.MinChannel;
_maxChannel = _tuner.MaxChannel;
//add the wdm crossbar device and connect tvtuner->crossbar
_crossbar = new Crossbar();
if (!_crossbar.CreateFilterInstance(graph, _graphBuilder, _tuner))
{
Log.Log.Error("analog: unable to add tv crossbar filter");
throw new TvException("Analog: unable to add tv crossbar filter");
}
//add the tv audio tuner device and connect it to the crossbar
_tvAudio = new TvAudio();
if (!_tvAudio.CreateFilterInstance(graph, _graphBuilder, _tuner, _crossbar))
{
Log.Log.Error("analog: unable to add tv audio tuner filter");
throw new TvException("Analog: unable to add tv audio tuner filter");
}
//add the tv capture device and connect it to the crossbar
_capture = new Capture();
if (!_capture.CreateFilterInstance(graph, _capBuilder, _graphBuilder, _tuner, _crossbar, _tvAudio))
{
Log.Log.Error("analog: unable to add capture filter");
throw new TvException("Analog: unable to add capture filter");
}
Configuration.writeConfiguration(_configuration);
_teletext = new TeletextComponent();
if (_capture.SupportsTeletext)
{
if (!_teletext.CreateFilterInstance(graph, _graphBuilder, _capture))
{
Log.Log.Error("analog: unable to setup teletext filters");
throw new TvException("Analog: unable to setup teletext filters");
}
}
Configuration.writeConfiguration(_configuration);
_encoder = new Encoder();
if (!_encoder.CreateFilterInstance(_graphBuilder, _tuner, _tvAudio, _crossbar, _capture))
{
Log.Log.Error("analog: unable to add encoding filter");
throw new TvException("Analog: unable to add capture filter");
}
Log.Log.WriteFile("analog: Check quality control");
_qualityControl = QualityControlFactory.createQualityControl(_configuration, _encoder.VideoEncoderFilter,
_capture.VideoFilter, _encoder.MultiplexerFilter,
_encoder.VideoCompressorFilter);
if (_qualityControl == null)
{
Log.Log.WriteFile("analog: No quality control support found");
//If a hauppauge analog card, set bitrate to default
//As the graph is stopped, we don't need to pass in the deviceID
//However, if we wish to change quality for a live graph, the deviceID must be passed in
if (_tunerDevice != null && _capture.VideoFilter != null)
{
if (_capture.VideoCaptureName.Contains("Hauppauge"))
{
Hauppauge _hauppauge = new Hauppauge(_capture.VideoFilter, string.Empty);
_hauppauge.SetStream(103);
_hauppauge.SetAudioBitRate(384);
_hauppauge.SetVideoBitRate(6000, 8000, true);
int min, max;
bool vbr;
_hauppauge.GetVideoBitRate(out min, out max, out vbr);
Log.Log.Write("Hauppauge set video parameters - Max kbps: {0}, Min kbps: {1}, VBR {2}", max, min, vbr);
_hauppauge.Dispose();
_hauppauge = null;
}
}
}
if (!AddTsFileSink())
{
throw new TvException("Analog: unable to add mpfilewriter");
}
Log.Log.WriteFile("analog: Graph is built");
FilterGraphTools.SaveGraphFile(_graphBuilder, "analog.grf");
ReloadCardConfiguration();
_graphState = GraphState.Created;
}
catch (TvExceptionSWEncoderMissing ex)
{
Log.Log.Write(ex);
Dispose();
_graphState = GraphState.Idle;
throw;
}
catch (Exception ex)
{
Log.Log.Write(ex);
Dispose();
_graphState = GraphState.Idle;
throw new TvExceptionGraphBuildingFailed("Graph building failed", ex);
}
}
/// <summary>
/// Disposes this instance.
/// </summary>
public virtual void Dispose()
{
if (_graphBuilder == null)
{
return;
}
Log.Log.WriteFile("analog:Dispose()");
if (!CheckThreadId())
{
return;
}
if (_graphState == GraphState.TimeShifting || _graphState == GraphState.Recording)
{
// Stop the graph first. To ensure that the timeshift files are no longer blocked
StopGraph();
}
FreeAllSubChannels();
IMediaControl mediaCtl = (_graphBuilder as IMediaControl);
if (mediaCtl == null)
{
throw new TvException("Can not convert graphBuilder to IMediaControl");
}
// Decompose the graph
mediaCtl.Stop();
FilterGraphTools.RemoveAllFilters(_graphBuilder);
Log.Log.WriteFile("analog:All filters removed");
if (_tuner != null)
{
_tuner.Dispose();
_tuner = null;
_tunerDevice = null;
}
if (_crossbar != null)
{
_crossbar.Dispose();
_crossbar = null;
}
if (_tvAudio != null)
{
_tvAudio.Dispose();
_tvAudio = null;
}
if (_capture != null)
{
_capture.Dispose();
_capture = null;
}
if (_encoder != null)
{
_encoder.Dispose();
_encoder = null;
}
if (_teletext != null)
{
_teletext.Dispose();
_teletext = null;
}
if (_tsFileSink != null)
{
Release.ComObject("tsFileSink filter", _tsFileSink);
_tsFileSink = null;
}
_rotEntry.Dispose();
_rotEntry = null;
Release.ComObject("Graphbuilder", _graphBuilder);
_graphBuilder = null;
_graphState = GraphState.Idle;
Log.Log.WriteFile("analog: dispose completed");
}