public override int Read(float[] buffer, int offset, int count, uint frame)
{
//ResetByFrame(frame); // TODO
// Get input samples
if (inputBuffer.Length < count)
{
inputBuffer = new float[count];
}
count = InputSampleProvider.Read(inputBuffer, 0, count, frame);
// Convolve each input sample with the filter coefficients
float outputSample;
for (int i = 0; i < count; i++)
{
// Load one sample into the circle buffer (overwriting the oldest sample)
inputCircleBuffer.Write(inputBuffer[i]);
outputSample = 0f;
int oldestInputOffset = 2 * filterCoefficients.Length - 1; // The offset of the last input sample
for (int j = 0; j < filterCoefficients.Length; j++)
{
// Fold two input samples together and multiply by the filter coefficient
outputSample += (inputCircleBuffer.Read(j) +
inputCircleBuffer.Read(oldestInputOffset - j)) * filterCoefficients[j];
}
// Put the output sample in the output buffer
buffer[i + offset] = outputSample;
}
return(count);
}
public override int Read(float[] buffer, int offset, int count, uint frame)
{
//ResetByFrame(frame);
// Grow input buffer and get samples
if (inputBuffer.Length < count)
{
inputBuffer = new float[count];
}
InputSampleProvider.Read(inputBuffer, 0, count, frame);
// Generate echoes
float outputSample;
for (int i = 0; i < count; i++)
{
// Adjust echo volume
amplitude = AmplitudeSmoothing * amplitude + (1f - AmplitudeSmoothing) * amplitudeTarget;
// Adjust delay
if (delaySamples < delaySamplesTarget)
{
delaySamples++;
}
else if (delaySamples > delaySamplesTarget)
{
delaySamples--;
}
// Read the oldest sample, mix it with the input and write it back to the circle buffer
outputSample = amplitude * echoCircleBuffer.Read(delaySamples) + inputBuffer[i];
echoCircleBuffer.Write(outputSample);
buffer[i + offset] = outputSample;
}
return(count);
}
