private IWaveProvider GetOggWaveProvider()
{
Logger.Info($"Reading Ogg @ {opts.File}");
var oggReader = new VorbisWaveReader(opts.File);
int bytes = (int)oggReader.Length;
byte[] buffer = new byte[bytes];
Logger.Info($"Read Ogg - Sample Rate {oggReader.WaveFormat.SampleRate}");
if (oggReader.WaveFormat.SampleRate < INPUT_SAMPLE_RATE)
{
Logger.Error($"Ogg Sample rate must be at least 16000 but is {oggReader.WaveFormat.SampleRate} - Quitting. Use Audacity or another tool to resample as 16000 or Higher");
Environment.Exit(1);
}
int read = oggReader.Read(buffer, 0, (int)bytes);
BufferedWaveProvider bufferedWaveProvider = new BufferedWaveProvider(oggReader.WaveFormat)
{
BufferLength = read * 2,
ReadFully = false,
DiscardOnBufferOverflow = true
};
bufferedWaveProvider.AddSamples(buffer, 0, read);
VolumeSampleProvider volumeSample =
new VolumeSampleProvider(bufferedWaveProvider.ToSampleProvider())
{
Volume = opts.Volume
};
oggReader.Close();
oggReader.Dispose();
Logger.Info($"Convert to Mono 16bit PCM");
//after this we've got 16 bit PCM Mono - just need to sort sample rate
return(volumeSample.ToMono().ToWaveProvider16());
}
private IWaveProvider GetMP3WaveProvider()
{
Logger.Info($"Reading MP3 @ {path}");
var mp3Reader = new Mp3FileReader(path);
int bytes = (int)mp3Reader.Length;
byte[] buffer = new byte[bytes];
Logger.Info($"Read MP3 @ {mp3Reader.WaveFormat}");
if (mp3Reader.WaveFormat.SampleRate < INPUT_SAMPLE_RATE)
{
Logger.Error($"Sample rate of MP3 too low - must be 16000 or higher and was - {mp3Reader.WaveFormat}");
Environment.Exit(1);
}
int read = mp3Reader.Read(buffer, 0, (int)bytes);
BufferedWaveProvider bufferedWaveProvider = new BufferedWaveProvider(mp3Reader.WaveFormat)
{
BufferLength = read * 2, ReadFully = false, DiscardOnBufferOverflow = true
};
bufferedWaveProvider.AddSamples(buffer, 0, read);
VolumeSampleProvider volumeSample =
new VolumeSampleProvider(bufferedWaveProvider.ToSampleProvider())
{
Volume = volume
};
mp3Reader.Close();
mp3Reader.Dispose();
Logger.Info($"Convert to Mono 16bit PCM");
//after this we've got 16 bit PCM Mono - just need to sort sample rate
return(volumeSample.ToMono().ToWaveProvider16());
}