public void TrimWavFile(WaveFileReader reader, VoiceAudioStream writer, long startPos, long endPos)
{
reader.Position = startPos;
var buffer = new byte[1024];
while (reader.Position < endPos)
{
var bytesRequired = (int)(endPos - reader.Position);
if (bytesRequired <= 0)
{
continue;
}
var bytesToRead = Math.Min(bytesRequired, buffer.Length);
var bytesRead = reader.Read(buffer, 0, bytesToRead);
if (bytesRead > 0)
{
writer.Write(buffer, 0, bytesRead);
}
}
}
/// <summary>
/// Processes this instance.
/// </summary>
private async Task _process()
{
_currentAudioProcessor = new AudioProcessor(_settings);
if (_settings.CaptureEvents && !_isDraining && _capture == null)
{
_capture = new CaptureEvents(Path.Combine(Path.GetTempPath(), BotConstants.DefaultOutputFolder, _settings.EventsFolder, _mediaId, "media"));
}
try
{
while (await _buffer.OutputAvailableAsync(_tokenSource.Token).ConfigureAwait(false))
{
SerializableAudioMediaBuffer data = await _buffer.ReceiveAsync(_tokenSource.Token).ConfigureAwait(false);
if (!data.IsSilence)
{
if (data.SerializableUnmixedAudioBuffers != null)
{
foreach (var s in data.SerializableUnmixedAudioBuffers)
{
if (string.IsNullOrWhiteSpace(s.AdId) || string.IsNullOrWhiteSpace(s.DisplayName))
{
continue;
}
_audioStream.Write(s.Buffer, 0, s.Buffer.Length);
}
}
}
if (_settings.CaptureEvents)
{
await _capture?.Append(data);
}
await _currentAudioProcessor.Append(data);
_tokenSource.Token.ThrowIfCancellationRequested();
}
}
catch (TaskCanceledException ex)
{
_logger.Error(ex, "The queue processing task has been cancelled.");
}
catch (ObjectDisposedException ex)
{
_logger.Error(ex, "The queue processing task object has been disposed.");
}
catch (Exception ex)
{
// Catch all other exceptions and log
_logger.Error(ex, "Caught Exception");
// Continue processing elements in the queue
await _process().ConfigureAwait(false);
}
//send final segment as a last precation in case the loop did not process it
if (_currentAudioProcessor != null)
{
await _chunkProcess();
}
if (_settings.CaptureEvents)
{
await _capture?.Finalise();
}
_isDraining = false;
}