/// <summary>
/// Finalises the wav writing and returns a list of all the files created
/// </summary>
/// <returns>System.String.</returns>
public async Task <string> Finalise()
{
//drain the un-processed buffers on this object
while (Buffer.Count > 0)
{
await Task.Delay(200);
}
var archiveFile = Path.Combine(Path.GetTempPath(), BotConstants.DefaultOutputFolder, _settings.MediaFolder, _processorId, $"{Guid.NewGuid()}.zip");
try
{
using (var stream = File.OpenWrite(archiveFile))
{
using (ZipArchive archive = new ZipArchive(stream, ZipArchiveMode.Create))
{
// drain all the writers
foreach (var writer in _writers.Values)
{
var localFiles = new List <string>();
var localArchive = archive; //protect the closure below
var localFileName = writer.Filename;
localFiles.Add(writer.Filename);
await writer.FlushAsync();
writer.Dispose();
// Is Resampling and/or mono to stereo conversion required?
if (_settings.AudioSettings.WavSettings != null)
{
// The resampling is required
localFiles.Add(AudioFileUtils.ResampleAudio(localFileName, _settings.AudioSettings.WavSettings, _settings.IsStereo));
}
else if (_settings.IsStereo) // Is Stereo audio required?
{
// Convert mono WAV to stereo
localFiles.Add(AudioFileUtils.ConvertToStereo(localFileName));
}
// Remove temporary saved local WAV file from the disk
foreach (var localFile in localFiles)
{
await Task.Run(() =>
{
var fInfo = new FileInfo(localFile);
localArchive.CreateEntryFromFile(localFile, fInfo.Name, CompressionLevel.Optimal);
File.Delete(localFile);
}).ConfigureAwait(false);
}
}
}
}
}
finally
{
await End();
}
return(archiveFile);
}
/// <summary>
/// Initialises the wav file writer.
/// </summary>
/// <param name="rootFolder">The root folder.</param>
/// <param name="id">The identifier.</param>
/// <returns>WavFileWriter.</returns>
private WaveFileWriter InitialiseWavFileWriter(string rootFolder, string id)
{
var path = AudioFileUtils.CreateFilePath(rootFolder, $"{id}.wav");
// Initialize the Wave Format using the default PCM 16bit 16K supported by Teams audio settings
var writer = new WaveFileWriter(path, new WaveFormat(
rate: AudioConstants.DefaultSampleRate,
bits: AudioConstants.DefaultBits,
channels: AudioConstants.DefaultChannels));
_writers.Add(id, writer);
return(writer);
}
