// ------ Data Subscriber Methods ------
// Creates and starts a data subscriber using the connection information supplied by the user in ConnectionUri.
// Subscribers created through this method should also be released by the ReleaseDataSubscriber method.
private DataSubscriber CreateDataSubscriber()
{
DataSubscriber subscriber = new DataSubscriber();
int index = ConnectionUri.IndexOf(URI_SEPARATOR);
string server = (index >= 0) ? ConnectionUri.Substring(0, index) : ConnectionUri;
subscriber.StatusMessage += DataSubscriber_StatusMessage;
subscriber.ProcessException += DataSubscriber_ProcessException;
subscriber.ConnectionEstablished += DataSubscriber_ConnectionEstablished;
subscriber.ConnectionTerminated += DataSubscriber_ConnectionTerminated;
subscriber.MetaDataReceived += DataSubscriber_MetaDataReceived;
subscriber.DataStartTime += DataSubscriber_DataStartTime;
subscriber.NewMeasurements += DataSubscriber_NewMeasurements;
subscriber.ConnectionString = string.Format("server={0}; interface={1}; localCertificate={2}; remoteCertificate={3}; validPolicyErrors={4}; validChainFlags={5}", server, IPv6Enabled ? "::0" : "0.0.0.0", FilePath.GetAbsolutePath("Local.cer"), FilePath.GetAbsolutePath("Remote.cer"), ~SslPolicyErrors.None, ~X509ChainStatusFlags.NoError);
subscriber.SecurityMode = EnableEncryption ? SecurityMode.TLS : SecurityMode.None;
if (!EnableCompression)
{
subscriber.OperationalModes = DataSubscriber.DefaultOperationalModes & ~OperationalModes.CompressPayloadData;
}
subscriber.ReceiveInternalMetadata = true;
subscriber.ReceiveExternalMetadata = true;
subscriber.Initialize();
subscriber.Start();
return(subscriber);
}
// ------ Data Subscriber Methods ------
// Creates and starts a data subscriber using the connection information supplied by the user in ConnectionUri.
// Subscribers created through this method should also be released by the ReleaseDataSubscriber method.
private DataSubscriber CreateDataSubscriber()
{
DataSubscriber subscriber = new DataSubscriber();
int index = ConnectionUri.IndexOf(URI_SEPARATOR, StringComparison.Ordinal);
string server = (index >= 0) ? ConnectionUri.Substring(0, index) : ConnectionUri;
subscriber.StatusMessage += DataSubscriber_StatusMessage;
subscriber.ProcessException += DataSubscriber_ProcessException;
subscriber.ConnectionEstablished += DataSubscriber_ConnectionEstablished;
subscriber.ConnectionTerminated += DataSubscriber_ConnectionTerminated;
subscriber.MetaDataReceived += DataSubscriber_MetaDataReceived;
subscriber.DataStartTime += DataSubscriber_DataStartTime;
subscriber.NewMeasurements += DataSubscriber_NewMeasurements;
subscriber.ConnectionString = $"server={server}; interface={(IPv6Enabled ? "::0" : "0.0.0.0")};{(UseZeroMQChannel ? " useZeroMQChannel=true;" : "")} localCertificate={FilePath.GetAbsolutePath("Local.cer")}; remoteCertificate={FilePath.GetAbsolutePath("Remote.cer")}; validPolicyErrors={~SslPolicyErrors.None}; validChainFlags={~X509ChainStatusFlags.NoError}";
subscriber.SecurityMode = EnableEncryption ? SecurityMode.TLS : SecurityMode.None;
subscriber.OperationalModes = DataSubscriber.DefaultOperationalModes;
subscriber.CompressionModes = CompressionModes.GZip;
if (EnableCompression)
{
subscriber.OperationalModes |= OperationalModes.CompressPayloadData;
bool usingUDP = false;
if (index >= 0)
{
usingUDP = ConnectionUri.Substring(index + URI_SEPARATOR.Length).ParseKeyValuePairs('&').ContainsKey("udp");
}
if (!usingUDP)
{
subscriber.CompressionModes |= CompressionModes.TSSC; // TSSC mode requires TCP connection
}
}
subscriber.ReceiveInternalMetadata = true;
subscriber.ReceiveExternalMetadata = true;
subscriber.Initialize();
subscriber.Start();
return(subscriber);
}
/// <summary>
/// Opens the stream and starts playback.
/// </summary>
/// <param name="songName">The name of the song to be played.</param>
public void Play(string songName)
{
if (m_dataSubscriber != null && m_metadata != null)
{
UnsynchronizedSubscriptionInfo info;
StringBuilder filterExpression = new StringBuilder();
DataTable deviceTable = m_metadata.Tables["DeviceDetail"];
DataTable measurementTable = m_metadata.Tables["MeasurementDetail"];
Dictionary <string, string> uriSettings;
string dataChannel = null;
int uriIndex = ConnectionUri.IndexOf(URI_SEPARATOR);
m_channelIndexes = new ConcurrentDictionary <Guid, int>();
m_sampleRate = DEFAULT_SAMPLE_RATE;
m_numChannels = DEFAULT_NUM_CHANNELS;
// Get sample rate from metadata.
if (deviceTable != null)
{
string sampleRate = deviceTable.Rows.Cast <DataRow>()
.Single(row => row["Acronym"].ToNonNullString() == songName)["FramesPerSecond"].ToNonNullString();
if (!string.IsNullOrEmpty(sampleRate))
{
m_sampleRate = int.Parse(sampleRate);
}
}
// Get measurements from metadata.
if (measurementTable != null)
{
IEnumerable <DataRow> measurementRows = measurementTable.Rows.Cast <DataRow>()
.Where(row => row["DeviceAcronym"].ToNonNullString() == songName)
.Where(row => row["SignalAcronym"].ToNonNullString() == "ALOG" || row["SignalAcronym"].ToNonNullString() == "VPHM")
.Where(row => row["Enabled"].ToNonNullString().ParseBoolean())
.OrderBy(row => row["ID"].ToNonNullString());
m_numChannels = 0;
foreach (DataRow row in measurementRows)
{
Guid measurementID = Guid.Parse(row["SignalID"].ToNonNullString());
if (m_numChannels > 0)
{
filterExpression.Append(';');
}
filterExpression.Append(measurementID);
m_channelIndexes[measurementID] = m_numChannels;
m_numChannels++;
}
}
// Create UDP data channel if specified.
if (uriIndex >= 0)
{
uriSettings = ConnectionUri.Substring(uriIndex + URI_SEPARATOR.Length).ParseKeyValuePairs('&');
if (uriSettings.ContainsKey("udp"))
{
dataChannel = string.Format("dataChannel={{port={0}; interface={1}}}", uriSettings["udp"], IPv6Enabled ? "::0" : "0.0.0.0");
}
}
m_buffer = new ConcurrentQueue <IMeasurement>();
m_dumpTimer = CreateDumpTimer();
m_statTimer = CreateStatTimer();
m_waveProvider = new BufferedWaveProvider(new WaveFormat(m_sampleRate < MINIMUM_SAMPLE_RATE ? MINIMUM_SAMPLE_RATE : m_sampleRate, m_numChannels));
m_wavePlayer = CreateWavePlayer(m_waveProvider);
m_waveProvider.DiscardOnBufferOverflow = true;
info = new UnsynchronizedSubscriptionInfo(false)
{
FilterExpression = filterExpression.ToString(),
ExtraConnectionStringParameters = dataChannel
};
m_statTimer.Start();
m_wavePlayer.Play();
m_dataSubscriber.UnsynchronizedSubscribe(info);
m_timeoutTimer.Start();
OnStateChanged(PlaybackState.Buffering);
}
}