protected virtual void ScanTrack(ScannerItem scannerItem)
{
var success = default(bool);
var flags = BassFlags.Decode | BassFlags.Float;
var stream = this.CreateStream(scannerItem.FileName, flags);
if (stream.IsEmpty)
{
Logger.Write(this, LogLevel.Warn, "Failed to create stream for file \"{0}\": Unknown error.", scannerItem.FileName);
throw new InvalidOperationException(string.Format("Failed to create stream for file \"{0}\": Unknown error.", scannerItem.FileName));
}
Logger.Write(this, LogLevel.Debug, "Created stream for file \"{0}\": {1}", scannerItem.FileName, stream.ChannelHandle);
var monitor = new ChannelMonitor(scannerItem, stream);
try
{
monitor.Start();
success = this.ScanTrack(scannerItem, stream);
}
finally
{
monitor.Dispose();
Logger.Write(this, LogLevel.Debug, "Releasing stream for file \"{0}\": {1}", scannerItem.FileName, stream.ChannelHandle);
Bass.StreamFree(stream.ChannelHandle); //Not checking result code as it contains an error if the application is shutting down.
}
if (this.CancellationToken.IsCancellationRequested)
{
scannerItem.Status = ScannerItemStatus.Cancelled;
}
else if (success)
{
scannerItem.Status = ScannerItemStatus.Complete;
}
else
{
Logger.Write(this, LogLevel.Warn, "Scanning file \"{0}\" failed: The format is likely not supported.", scannerItem.FileName);
scannerItem.AddError("The format is likely not supported.");
scannerItem.Status = ScannerItemStatus.Failed;
}
}
protected virtual void ScanGroups(IEnumerable <IEnumerable <ScannerItem> > groups)
{
var parallelOptions = new ParallelOptions()
{
MaxDegreeOfParallelism = this.Threads
};
Parallel.ForEach(groups, parallelOptions, group =>
{
var streams = new Dictionary <ScannerItem, IBassStream>();
foreach (var scannerItem in group)
{
try
{
if (this.CancellationToken.IsCancellationRequested)
{
Logger.Write(this, LogLevel.Warn, "Skipping file \"{0}\" due to cancellation.", scannerItem.FileName);
scannerItem.Status = ScannerItemStatus.Cancelled;
continue;
}
if (!this.CheckInput(scannerItem.FileName))
{
Logger.Write(this, LogLevel.Warn, "Skipping file \"{0}\" due to file \"{1}\" does not exist.", scannerItem.FileName);
scannerItem.Status = ScannerItemStatus.Failed;
scannerItem.AddError(string.Format("File \"{0}\" does not exist.", scannerItem.FileName));
continue;
}
var flags = BassFlags.Decode | BassFlags.Float;
var stream = this.CreateStream(scannerItem.FileName, flags);
if (stream.IsEmpty)
{
Logger.Write(this, LogLevel.Warn, "Failed to create stream for file \"{0}\": Unknown error.", scannerItem.FileName);
throw new InvalidOperationException(string.Format("Failed to create stream for file \"{0}\": Unknown error.", scannerItem.FileName));
}
Logger.Write(this, LogLevel.Debug, "Created stream for file \"{0}\": {1}", scannerItem.FileName, stream.ChannelHandle);
streams.Add(scannerItem, stream);
Logger.Write(this, LogLevel.Debug, "Beginning scanning file \"{0}\".", scannerItem.FileName);
scannerItem.Progress = ScannerItem.PROGRESS_NONE;
scannerItem.Status = ScannerItemStatus.Processing;
}
catch (OperationCanceledException)
{
Logger.Write(this, LogLevel.Warn, "Skipping file \"{0}\" due to cancellation.", scannerItem.FileName);
scannerItem.Status = ScannerItemStatus.Cancelled;
}
catch (Exception e)
{
Logger.Write(this, LogLevel.Warn, "Scanning file \"{0}\" failed: {1}", scannerItem.FileName, e.Message);
scannerItem.Status = ScannerItemStatus.Failed;
scannerItem.AddError(e.Message);
}
}
var success = default(bool);
var monitors = new List <ChannelMonitor>();
try
{
foreach (var scannerItem in streams.Keys)
{
var stream = streams[scannerItem];
var monitor = new ChannelMonitor(scannerItem, stream);
monitor.Start();
monitors.Add(monitor);
}
success = this.ScanGroup(streams);
}
finally
{
foreach (var monitor in monitors)
{
monitor.Dispose();
}
foreach (var scannerItem in streams.Keys)
{
var stream = streams[scannerItem];
Logger.Write(this, LogLevel.Debug, "Releasing stream for file \"{0}\": {1}", scannerItem.FileName, stream.ChannelHandle);
Bass.StreamFree(stream.ChannelHandle); //Not checking result code as it contains an error if the application is shutting down.
}
}
foreach (var scannerItem in streams.Keys)
{
if (this.CancellationToken.IsCancellationRequested)
{
scannerItem.Status = ScannerItemStatus.Cancelled;
}
else if (success)
{
Logger.Write(this, LogLevel.Debug, "Scanning file \"{0}\" completed successfully.", scannerItem.FileName);
scannerItem.Status = ScannerItemStatus.Complete;
}
else
{
Logger.Write(this, LogLevel.Warn, "Scanning file \"{0}\" failed: The format is likely not supported.", scannerItem.FileName);
scannerItem.AddError("The format is likely not supported.");
scannerItem.Status = ScannerItemStatus.Failed;
}
}
});
}
