private static WaveStream CreateInputStream(string fileName)
{
WaveChannel32 inputStream;
WaveStream readerStream = null;
if (fileName.EndsWith(".wav"))
{
readerStream = new WaveFileReader(fileName);
}
else if (fileName.EndsWith(".flac"))
{
readerStream = new FLACFileReader(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);
}
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(".flac"))
{
readerStream = new FLACFileReader(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>
public static WaveStream CreateInputWaveChannel(string filename)
{
WaveStream m_blockAlignedStream = null;
WaveStream m_waveReader = null;
WaveChannel32 m_waveChannel = null;
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 OggFileReader(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);
}
//return m_waveReader;
return m_waveChannel;
}