/// <summary>
/// Decode a signal from the specified file.
/// </summary>
///
/// <param name="fileName">File name to read signal from.</param>
/// <param name="frameInfo">Information about the decoded signal.</param>
///
/// <returns>Return decoded signal.</returns>
///
public static Signal DecodeFromFile(string fileName, out FrameInfo frameInfo)
{
string fileExtension = FormatDecoderAttribute.GetNormalizedExtension(fileName);
IAudioDecoder decoder = FormatDecoderAttribute.GetDecoders(fileExtension, decoderTypes, decoders.Value);
if (decoder != null)
{
// open stream
using (FileStream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
// open decoder
decoder.Open(stream);
// read all audio frames
Signal signal = decoder.Decode();
decoder.Close();
frameInfo = new FrameInfo(signal.NumberOfChannels, signal.SampleRate, Signal.GetSampleSize(signal.SampleFormat), 0, signal.Length);
return(signal);
}
}
throw new ArgumentException(String.Format("No suitable decoder has been found for the file format {0}. If ", fileExtension) +
"you are trying to decode .wav files, please add a reference to Accord.Audio.DirectSound. You might need to instantiate" +
"at least one type from this assembly to make sure it has been loaded in the AppDomain of your applicatoin.", "fileName");
}
private void _DoFree()
{
if (_PaHandle != null)
{
if (_Stream != IntPtr.Zero)
{
_PaHandle.CloseStream(_Stream);
}
_PaHandle.Close();
_PaHandle = null;
}
if (_DecoderThread != null)
{
if (Thread.CurrentThread.ManagedThreadId != _DecoderThread.ManagedThreadId)
{
throw new Exception("Another thread should never free the decoder thread!");
}
_DecoderThread = null;
}
if (_Decoder != null)
{
_Decoder.Close();
_Decoder = null;
}
if (_EventDecode != null)
{
_EventDecode.Close();
_EventDecode = null;
}
if (_CloseStreamListener != null)
{
_CloseStreamListener.OnCloseStream(this);
}
}
/// <summary>
/// Decode a signal from the specified file.
/// </summary>
///
/// <param name="fileName">File name to read signal from.</param>
/// <param name="frameInfo">Information about the decoded signal.</param>
///
/// <returns>Return decoded signal.</returns>
///
public static Signal DecodeFromFile(string fileName, out FrameInfo frameInfo)
{
Signal signal = null;
string fileExtension = Path.GetExtension(fileName).ToUpperInvariant();
if ((fileExtension != string.Empty) && (fileExtension.Length != 0))
{
fileExtension = fileExtension.Substring(1);
if (!decoders.ContainsKey(fileExtension))
{
FormatDecoderAttribute.PopulateDictionaryWithDecodersFromAllAssemblies <IAudioDecoder>(decoders, fileExtension);
}
if (decoders.ContainsKey(fileExtension))
{
IAudioDecoder decoder = (IAudioDecoder)Activator.CreateInstance(decoders[fileExtension]);
// open stream
using (FileStream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read))
{
// open decoder
decoder.Open(stream);
// read all audio frames
signal = decoder.Decode();
decoder.Close();
}
frameInfo = new FrameInfo(signal.Channels, signal.SampleRate, Signal.GetSampleSize(signal.SampleFormat), 0, signal.Length);
return(signal);
}
}
throw new ArgumentException(String.Format("No suitable decoder has been found for the file format {0}. If ", fileExtension) +
"you are trying to decode .wav files, please add a reference to Accord.Audio.DirectSouond.", "fileName");
}
private void _DoFree()
{
if (_Source != 0)
{
AL.SourceStop(_Source);
if (_Buffers != null)
{
AL.DeleteBuffers(_Buffers);
_Buffers = null;
}
AL.DeleteSource(_Source);
_Source = 0;
}
if (_DecoderThread != null)
{
if (Thread.CurrentThread.ManagedThreadId != _DecoderThread.ManagedThreadId)
{
throw new Exception("Another thread should never free the decoder thread!");
}
_DecoderThread = null;
}
if (_Decoder != null)
{
_Decoder.Close();
_Decoder = null;
}
_SampleBuf = null;
if (_EventDecode != null)
{
_EventDecode.Close();
_EventDecode = null;
}
if (_CloseStreamListener != null)
{
_CloseStreamListener.OnCloseStream(this);
}
}
