在cscore中编辑单个样本

Question

我正在尝试使用CScore获取单独的32位示例。我到目前为止

    public MainWindow()
    {
        InitializeComponent();
        var wasapiCapture = new WasapiCapture();
        wasapiCapture.Initialize();
        wasapiCapture.Start();
        var wasapiCaptureSource = new SoundInSource(wasapiCapture);
        var stereoSource = wasapiCaptureSource.ToStereo();
        var ieeeFloatToSample = new IeeeFloatToSample(stereoSource);
        var sampleProvider = new SampleProvider(ieeeFloatToSample);
        var wavesource = sampleProvider.ToWaveSource();
        var wasapiOut = new WasapiOut();
        wasapiOut.Initialize(wavesource);
        wasapiOut.Play();
    }

和一堂课

class SampleProvider : ISampleSource
{
    private ISampleSource _source;
    public SampleProvider(ISampleSource source)
    {
        this._source = source;
    }

    public int Read(float[] buffer, int offset, int count)
    {
        var sampleRead = _source.Read(buffer, 0, count);
        return sampleRead;
    }

    public void Dispose()
    {
        throw new NotImplementedException();
    }
    public WaveFormat WaveFormat { get; private set; }
    public long Position { get; set; }
    public long Length { get; private set; }
}

我原以为可以不作改动地传递音频，但我在sampleProvider.ToWaveSource()上得到了一个错误：“对象引用没有设置为对象的实例”

有什么想法吗？谢谢。

Answer 1

如果您仔细查看CSCore源代码，您会发现ToWaveSource最终克隆了您的SampleProvider的WaveFormat --这是您没有定义的。您可能只需从上游源返回WaveFormat：

public WaveFormat WaveFormat { get { return _source.WaveFormat; } }