private static WaveStream CreateInputStream(string fileName)
{
WaveChannel32 inputStream;
WaveStream readerStream = null;
if (fileName.EndsWith(".wav"))
{
readerStream = new WaveFileReader(fileName);
}
else if (fileName.EndsWith(".ogg"))
{
readerStream = new OggVorbisFileReader(fileName);
}
else
{
throw new InvalidOperationException("Unsupported extension");
}
// Provide PCM conversion if needed
if (readerStream.WaveFormat.Encoding != WaveFormatEncoding.Pcm)
{
readerStream = WaveFormatConversionStream.CreatePcmStream(readerStream);
readerStream = new BlockAlignReductionStream(readerStream);
}
// Provide conversion to 16 bits if needed
if (readerStream.WaveFormat.BitsPerSample != 16)
{
var format = new WaveFormat(readerStream.WaveFormat.SampleRate,
16, readerStream.WaveFormat.Channels);
readerStream = new WaveFormatConversionStream(format, readerStream);
}
inputStream = new WaveChannel32(readerStream);
return(inputStream);
}
private static WaveStream CreateInputStream(string fileName)
{
WaveChannel32 inputStream;
WaveStream readerStream = null;
if (fileName.EndsWith(".wav"))
{
readerStream = new WaveFileReader(fileName);
}
else if (fileName.EndsWith(".ogg"))
{
readerStream = new OggVorbisFileReader(fileName);
}
else
{
throw new InvalidOperationException("Unsupported extension");
}
// Provide PCM conversion if needed
if (readerStream.WaveFormat.Encoding != WaveFormatEncoding.Pcm)
{
readerStream = WaveFormatConversionStream.CreatePcmStream(readerStream);
readerStream = new BlockAlignReductionStream(readerStream);
}
// Provide conversion to 16 bits if needed
if (readerStream.WaveFormat.BitsPerSample != 16)
{
var format = new WaveFormat(readerStream.WaveFormat.SampleRate,
16, readerStream.WaveFormat.Channels);
readerStream = new WaveFormatConversionStream(format, readerStream);
}
inputStream = new WaveChannel32(readerStream);
return inputStream;
}
/// <summary>
/// Creates an input WaveChannel (Audio file reader for MP3/WAV/OGG/FLAC/WMA/AIFF/Other formats in the future)
/// </summary>
/// <param name="filename"></param>
private void CreateInputWaveChannel(string filename)
{
string fileExt = Path.GetExtension(filename.ToLower());
if (fileExt == MP3Extension)
{
m_waveReader = new Mp3FileReader(filename);
m_blockAlignedStream = new BlockAlignReductionStream(m_waveReader);
// Wave channel - reads from file and returns raw wave blocks
m_waveChannel = new WaveChannel32(m_blockAlignedStream);
}
else if (fileExt == WAVExtension)
{
m_waveReader = new WaveFileReader(filename);
if (m_waveReader.WaveFormat.Encoding != WaveFormatEncoding.Pcm)
{
m_waveReader = WaveFormatConversionStream.CreatePcmStream(m_waveReader);
m_waveReader = new BlockAlignReductionStream(m_waveReader);
}
if (m_waveReader.WaveFormat.BitsPerSample != 16)
{
var format = new WaveFormat(m_waveReader.WaveFormat.SampleRate,
16, m_waveReader.WaveFormat.Channels);
m_waveReader = new WaveFormatConversionStream(format, m_waveReader);
}
m_waveChannel = new WaveChannel32(m_waveReader);
}
else if (fileExt == OGGVExtension)
{
m_waveReader = new OggVorbisFileReader(filename);
if (m_waveReader.WaveFormat.Encoding != WaveFormatEncoding.Pcm)
{
m_waveReader = WaveFormatConversionStream.CreatePcmStream(m_waveReader);
m_waveReader = new BlockAlignReductionStream(m_waveReader);
}
if (m_waveReader.WaveFormat.BitsPerSample != 16)
{
var format = new WaveFormat(m_waveReader.WaveFormat.SampleRate,
16, m_waveReader.WaveFormat.Channels);
m_waveReader = new WaveFormatConversionStream(format, m_waveReader);
}
m_waveChannel = new WaveChannel32(m_waveReader);
}
else if (fileExt == FLACExtension)
{
m_waveReader = new FLACFileReader(filename);
if (m_waveReader.WaveFormat.Encoding != WaveFormatEncoding.Pcm)
{
m_waveReader = WaveFormatConversionStream.CreatePcmStream(m_waveReader);
m_waveReader = new BlockAlignReductionStream(m_waveReader);
}
if (m_waveReader.WaveFormat.BitsPerSample != 16)
{
var format = new WaveFormat(m_waveReader.WaveFormat.SampleRate,
16, m_waveReader.WaveFormat.Channels);
m_waveReader = new WaveFormatConversionStream(format, m_waveReader);
}
m_waveChannel = new WaveChannel32(m_waveReader);
}
else if (fileExt == WMAExtension)
{
m_waveReader = new WMAFileReader(filename);
if (m_waveReader.WaveFormat.Encoding != WaveFormatEncoding.Pcm)
{
m_waveReader = WaveFormatConversionStream.CreatePcmStream(m_waveReader);
m_waveReader = new BlockAlignReductionStream(m_waveReader);
}
if (m_waveReader.WaveFormat.BitsPerSample != 16)
{
var format = new WaveFormat(m_waveReader.WaveFormat.SampleRate,
16, m_waveReader.WaveFormat.Channels);
m_waveReader = new WaveFormatConversionStream(format, m_waveReader);
}
m_waveChannel = new WaveChannel32(m_waveReader);
}
else if (fileExt == AIFFExtension)
{
m_waveReader = new AiffFileReader(filename);
m_waveChannel = new WaveChannel32(m_waveReader);
}
else
{
throw new ApplicationException("Cannot create Input WaveChannel - Unknown file type: " + fileExt);
}
}
