/// <summary>
/// Releases the unmanaged resources used by the <see cref="WavInputAdapter"/> object and optionally releases the managed resources.
/// </summary>
/// <param name="disposing">true to release both managed and unmanaged resources; false to release only unmanaged resources.</param>
protected override void Dispose(bool disposing)
{
if (!m_disposed)
{
try
{
if (disposing)
{
if ((object)m_dataReader != null)
{
m_dataReader.Close();
m_dataReader.Dispose();
m_dataReader = null;
}
if ((object)m_dataCache != null)
{
m_dataCache.Dispose();
}
}
}
finally
{
m_disposed = true; // Prevent duplicate dispose.
base.Dispose(disposing); // Call base class Dispose().
}
}
}
public void TestFFTConvolutionWavStream()
{
WaveDataReader wavReader = WaveDataReader.FromFile("ToneWithHighFrequency.wav");
while (wavReader.WaveStream.Position < wavReader.WaveStream.Length)
{
}
}
/// <summary>
/// Attempts to close the file and release resources held by the adapter.
/// </summary>
protected override void AttemptDisconnection()
{
if ((object)m_dataReader != null)
{
m_dataReader.Close();
m_dataReader.Dispose();
m_dataReader = null;
}
}
/// <summary>
/// Attempts to close the file and release resources held by the adapter.
/// </summary>
protected override void AttemptDisconnection()
{
if (m_data != null)
{
m_data.Close();
m_data.Dispose();
}
m_data = null;
}
/// <summary>
/// Attempts to open the file to start getting wave data.
/// </summary>
protected override void AttemptConnection()
{
m_dataReader = OpenWaveDataReader();
m_dataIndex = 0;
m_startTime = DateTime.UtcNow.Ticks;
new Thread(ProcessMeasurements)
{
IsBackground = true
}.Start();
}
// Open wave reader - either from memory loaded WAV or directly from disk
private WaveDataReader OpenWaveDataReader()
{
if (MemoryCache)
{
if ((object)m_dataCache == null)
{
m_dataCache = new BlockAllocatedMemoryStream();
using (FileStream stream = File.OpenRead(WavFileName))
stream.CopyTo(m_dataCache);
}
m_dataCache.Position = 0;
return(WaveDataReader.FromStream(m_dataCache));
}
return(WaveDataReader.FromFile(WavFileName));
}
/// <summary>
/// Attempts to open the file to start getting wave data.
/// </summary>
protected override void AttemptConnection()
{
WaveFile fileInfo = WaveFile.Load(WavFileName, false);
m_channels = fileInfo.Channels;
m_sampleRate = fileInfo.SampleRate;
m_numSamples = fileInfo.DataChunk.ChunkSize / fileInfo.BlockAlignment;
m_audioLength = fileInfo.AudioLength;
m_data = WaveDataReader.FromFile(WavFileName);
m_dataIndex = 0;
//if (file.Channels != OutputMeasurements.Length)
// throw new ArgumentException(string.Format("The number of channels in the WAV file must match the number of output measurements. Channels: {0}, Measurements: {1}", file.Channels, OutputMeasurements.Length));
m_startTime = DateTime.UtcNow.Ticks;
Thread t = new Thread(ProcessMeasurements);
t.IsBackground = true;
t.Start();
}
/// <summary>
/// Releases the unmanaged resources used by the <see cref="WavInputAdapter"/> object and optionally releases the managed resources.
/// </summary>
/// <param name="disposing">true to release both managed and unmanaged resources; false to release only unmanaged resources.</param>
protected override void Dispose(bool disposing)
{
if (!m_disposed)
{
try
{
if (disposing)
{
if (m_data != null)
{
m_data.Close();
m_data.Dispose();
}
m_data = null;
}
}
finally
{
m_disposed = true; // Prevent duplicate dispose.
base.Dispose(disposing); // Call base class Dispose().
}
}
}
private void ProcessMeasurements()
{
List <IMeasurement> measurements = new List <IMeasurement>((int)(Ticks.ToSeconds(GapThreshold) * m_sampleRate * m_channels * 1.1D));
LittleBinaryValue[] sample;
while (Enabled)
{
try
{
SpinWait spinner = new SpinWait();
// Determine what time it is now
long now = DateTime.UtcNow.Ticks;
// Assign a timestamp to the next sample based on its location
// in the file relative to the other samples in the file
long timestamp = m_startTime + (m_dataIndex * Ticks.PerSecond / m_sampleRate);
if (now - timestamp > GapThreshold)
{
// Reset the start time and delay next transmission in an attempt to catch up
m_startTime = now - (m_dataIndex * Ticks.PerSecond / m_sampleRate) + Ticks.FromSeconds(RecoveryDelay);
timestamp = now;
OnStatusMessage(MessageLevel.Info, "Start time reset.");
}
// Keep generating measurements until
// we catch up to the current time.
while (timestamp < now)
{
sample = m_dataReader.GetNextSample();
// If the sample is null, we've reached the end of the file - close and reopen,
// resetting the data index and start time
if (sample == null)
{
m_dataReader.Close();
m_dataReader.Dispose();
m_dataReader = OpenWaveDataReader();
m_dataIndex = 0;
m_startTime = timestamp;
sample = m_dataReader.GetNextSample();
}
// Create new measurements, one for each channel, and add them to the measurements list
for (int i = 0; i < m_channels; i++)
{
measurements.Add(Measurement.Clone(OutputMeasurements[i], sample[i].ConvertToType(TypeCode.Double), timestamp));
}
// Update the data index and recalculate the assigned timestamp for the next sample
m_dataIndex++;
timestamp = m_startTime + (m_dataIndex * Ticks.PerSecond / m_sampleRate);
}
OnNewMeasurements(measurements);
measurements.Clear();
while (DateTime.UtcNow.Ticks - timestamp <= GapThreshold / 100)
{
// Ahead of schedule -- pause for a moment
spinner.SpinOnce();
}
}
catch (Exception ex)
{
OnProcessException(MessageLevel.Warning, ex);
}
}
}
