private static IAudioStream TryOpenSourceStream(FileInfo fileInfo)
{
WaveStream waveStream;
if ((waveStream = OpenFile(fileInfo)) != null)
{
return(new NAudioSourceStream(waveStream));
}
else if (FFmpegSourceStream.WaveProxySuggested(fileInfo))
{
Console.WriteLine("File format with known seek problems, creating proxy file...");
return(TryOpenSourceStream(FFmpegSourceStream.CreateWaveProxy(fileInfo)));
}
else
{
try {
FFmpegSourceStream stream = new FFmpegSourceStream(fileInfo);
// Make a seek to test if it works or if it throws an exception
stream.Position = 0;
return(stream);
}
catch (FFmpegSourceStream.FileNotSeekableException) {
/*
* This exception gets thrown if a file is not seekable and therefore cannot
* provide all the functionality that is needed for an IAudioStream, although
* the problem could be solved by creating a seek index. See FFmpegSourceStream
* for further information.
*
* For now, we create a WAV proxy file, because it is easier (consumes
* additional space though).
*/
Console.WriteLine("File not seekable, creating proxy file...");
return(TryOpenSourceStream(FFmpegSourceStream.CreateWaveProxy(fileInfo)));
}
catch (FFmpegSourceStream.FileSeekException) {
/*
* This exception gets thrown if a file should be seekable but seeking still does
* not work correctly. We also create a proxy in this case.
*/
Console.WriteLine("File test seek failed, creating proxy file...");
return(TryOpenSourceStream(FFmpegSourceStream.CreateWaveProxy(fileInfo)));
}
catch (DllNotFoundException e) {
throw new DllNotFoundException("Cannot open file through FFmpeg: DLL missing", e);
}
}
}
private static IAudioStream TryOpenSourceStream(FileInfo fileInfo)
{
WaveStream waveStream;
if ((waveStream = OpenFile(fileInfo)) != null)
{
return(new NAudioSourceStream(waveStream));
}
else if (FFmpegSourceStream.WaveProxySuggested(fileInfo))
{
Console.WriteLine("File format with known seek problems, creating proxy file...");
return(TryOpenSourceStream(FFmpegSourceStream.CreateWaveProxy(fileInfo)));
}
else
{
try {
return(new FFmpegSourceStream(fileInfo));
}
catch (FFmpegSourceStream.FileNotSeekableException) {
/*
* This exception gets thrown is a file is not seekable and therefore cannot
* provide all the functionality that is needed for an IAudioStream, although
* the problem could be solved by creating a seek index. See FFmpegSourceStream
* for further information.
*
* For now, we create a WAV proxy file, because it is easier (consumes
* additional space though).
*/
Console.WriteLine("File not seekable, creating proxy file...");
return(TryOpenSourceStream(FFmpegSourceStream.CreateWaveProxy(fileInfo)));
}
catch (DllNotFoundException) {
Console.WriteLine("Cannot open file through FFmpeg: DLL missing");
}
catch {
// file probably unsupported
Console.WriteLine("unsupported file format");
}
}
return(null);
}
