protected unsafe void ResampleStream(ReadOnlySpan <float> samples, Span <float> output, int channel, bool last, out int inputSamplesUsed, out int outputSamplesUsed)
{
if (handles[channel] == IntPtr.Zero)
{
throw new ObjectDisposedException(nameof(handles));
}
int processedSamples;
int sampleBufferUsed;
fixed(float *samplePtr = samples)
fixed(float *outputPtr = output)
{
processedSamples = LibResampleAPI.resample_process(handles[channel],
factor,
samplePtr,
samples.Length,
last ? 1 : 0,
out sampleBufferUsed,
outputPtr,
output.Length);
}
inputSamplesUsed = Math.Max(sampleBufferUsed, 0);
outputSamplesUsed = Math.Max(processedSamples, 0);
}
protected virtual void Dispose(bool disposing)
{
if (!disposed)
{
for (int i = 0; i < Channels; i++)
{
LibResampleAPI.resample_close(handles[i]);
handles[i] = IntPtr.Zero;
}
disposed = true;
}
}
public LibResampler(int originalRate, int newRate, int channels)
{
SampleRate = newRate;
Channels = channels;
factor = SampleRate / (double)originalRate;
handles = new IntPtr[Channels];
for (int i = 0; i < Channels; i++)
{
handles[i] = LibResampleAPI.resample_open(1, factor, factor);
}
}