如何在从 'ISampleSource' 中读取样本数组后回放样本数组

Question

所以，我有一段代码将 ISampleSource 读出到 float[][]，第一个数组层用于通道数，第二个用于通道内的样本数据这个频道。我将获取这些数据并尝试对其应用信号处理，但是出于调试目的，我可能想要操作示例数组然后播放它以便我可以 "hear" 代码正在做什么。有没有一种简单的方法来获取 ISampleSource.Read 返回的数据并将其粘贴回 new ISampleSource 以便可以将其转换为 IWaveSource 并使用 WasapiOut?

播放

这是我到目前为止尝试制作的 class，你将它传递给 float[][] 并且基本上所有数据都在 WaveFormat 中，以便它制作一个......但是它实际上并没有做 任何事情。没有错误，没有播放.. 什么都不做。我做错了什么？

private class SampleSource : ISampleSource
{
    public long Position { get; set; }
    public WaveFormat WaveFormat { get; private set; }
    public bool CanSeek => true;
    public long Length  => _data.Length;

    private float[] _data;
    private long readPoint = 0;

    public SampleSource(float[][] samples, int sampleRate, int bits, int channels)
    {
        WaveFormat = new WaveFormat(sampleRate, bits, channels);
        if (samples.Length <= 0) return;

        _data = new float[samples[0].Length * samples.Length];
        int cchannels = samples.Length;
        int sampleLength = samples[0].Length;

        for (var i = 0; i < sampleLength; i += cchannels)
            for (var n = 0; n < cchannels; n++)
                _data[i + n] = samples[n][i / cchannels];
    }

    public int Read(float[] buffer, int offset, int count)
    {
        if (_data.Length < Position + count)
            count = (int) (_data.Length - Position);

        float[] outFloats = new float[count];
        for (var i = 0; i < count; i++)
            outFloats[i] = _data[i + Position + offset];

        buffer = outFloats;
        Position += count;
        return count;
    }

    public void Dispose() =>_data = null;
}

Answer 1

而不是尝试将 buffer 设置为新数组（这毫无意义）我需要直接写入 buffer 数组元素，以便它们可以在函数之外使用称呼。我真的不喜欢这样做，也许是为了解决我没有看到的问题，但显然这就是我使用的库的方式。

private class SampleSource : ISampleSource
{
    public long Position { get; set; }
    public WaveFormat WaveFormat { get; private set; }
    public bool CanSeek => true;
    public long Length  => _data.Length;

    private float[] _data;
    private long readPoint = 0;

    public SampleSource(float[][] samples, int sampleRate, int bits, int channels)
    {
        WaveFormat = new WaveFormat(sampleRate, bits, channels);
        if (samples.Length <= 0) return;

        _data = new float[samples[0].Length * samples.Length];
        int cchannels = samples.Length;
        int sampleLength = samples[0].Length;

        for (var i = 0; i < sampleLength; i += cchannels)
            for (var n = 0; n < cchannels; n++)
                _data[i + n] = samples[n][i / cchannels];
    }

    public int Read(float[] buffer, int offset, int count)
    {
        /*THIS IS THE CHANGED FUNCTION*/
        if (_data.Length < Position + count)
            count = (int) (_data.Length - Position);

        for (var i = 0; i < count; i++)
            buffer[i] = _data[i + Position + offset];

        Position += count;
        return count;
    }

    public void Dispose() =>_data = null;
}

如何在从 'ISampleSource' 中读取样本数组后回放样本数组

How to play back a array of samples after reading them from an 'ISampleSource'

c#

cscore