private IWaveSource GetCodec(string filename)
{
// FfmpegDecoder constructor which uses string as parameter throws exception
// "Exception: avformat_open_input returned 0xffffffea: Invalid argument."
// when the file name contains special characters.
// See: https://github.com/filoe/cscore/issues/298
// Workaround: use the constructor which uses stream as parameter.
// IWaveSource waveSource = new FfmpegDecoder(this.filename);
this.audioStream = File.OpenRead(this.filename);
IWaveSource waveSource = new FfmpegDecoder(this.audioStream);
// If the SampleRate < 32000, make it 32000. The Equalizer's maximum frequency is 16000Hz.
// The sample rate has to be bigger than 2 * frequency.
if (waveSource.WaveFormat.SampleRate < 32000)
{
waveSource = waveSource.ChangeSampleRate(32000);
}
return(waveSource
.ToSampleSource()
.AppendSource(this.Create10BandEqualizer, out this.equalizer)
.ToWaveSource());
}
private IWaveSource GetCodec(string filename)
{
IWaveSource waveSource;
try
{
if (System.IO.Path.GetExtension(this.filename.ToLower()) == FileFormats.MP3)
{
// For MP3's, we force usage of MediaFoundationDecoder. CSCore uses DmoMp3Decoder
// by default. DmoMp3Decoder however is very slow at playing MP3's from a NAS.
// So we're using MediaFoundationDecoder until DmoMp3Decoder has improved.
waveSource = new MediaFoundationDecoder(this.filename);
}
else
{
// Other file formats are using the default decoders
waveSource = CodecFactory.Instance.GetCodec(this.filename);
}
}
catch (Exception)
{
waveSource = new FfmpegDecoder(filename); //try ffmpeg as last option
}
// If the SampleRate < 32000, make it 32000. The Equalizer's maximum frequency is 16000Hz.
// The samplerate has to be bigger than 2 * frequency.
if (waveSource.WaveFormat.SampleRate < 32000)
{
waveSource = waveSource.ChangeSampleRate(32000);
}
return(waveSource
.ToSampleSource()
.AppendSource(this.Create10BandEqualizer, out this.equalizer)
.ToWaveSource());
}
