/// <summary>
/// Adds <paramref name="numSamples"/> pieces of samples from the
/// <paramref name="samples"/> memory position into the input of the
/// object. Notice that sample rate _has_to_ be set before calling this
/// function, otherwise throws a runtime_error exception.
/// </summary>
/// <param name="samples">Pointer to sample buffer.</param>
/// <param name="numSamples">Number of samples in buffer. Notice that in
/// case of stereo-sound a single sample contains data for both
/// channels.</param>
/// <exception cref="InvalidOperationException">Sample rate or number of
/// channels not defined</exception>
public override void PutSamples(ArrayPtr <TSampletype> samples, int numSamples)
{
if (!_isSampleRateSet)
{
throw new InvalidOperationException("SoundTouch : Sample rate not defined");
}
if (_channels == 0)
{
throw new InvalidOperationException("SoundTouch : Number of channels not defined");
}
// accumulate how many samples are expected out from processing, given the current
// processing setting
_samplesExpectedOut += (double)numSamples / ((double)_rate * (double)_tempo);
#if !SOUNDTOUCH_PREVENT_CLICK_AT_RATE_CROSSOVER
if (_rate <= 1.0)
{
// transpose the rate down, output the transposed sound to tempo changer buffer
Debug.Assert(Output == _stretch);
_rateTransposer.PutSamples(samples, numSamples);
_stretch.MoveSamples(_rateTransposer);
}
else
#endif
{
// evaluate the tempo changer, then transpose the rate up,
Debug.Assert(Output == _rateTransposer);
_stretch.PutSamples(samples, numSamples);
_rateTransposer.MoveSamples(_stretch);
}
}
/// <summary>
/// Calculates effective rate & tempo values from
/// <see cref="_virtualRate"/>, <see cref="_virtualTempo"/> and
/// <see cref="_virtualPitch"/> parameters.
/// </summary>
private void CalcEffectiveRateAndTempo()
{
float oldTempo = _tempo;
float oldRate = _rate;
_tempo = _virtualTempo / _virtualPitch;
_rate = _virtualPitch * _virtualRate;
if (!TestFloatEqual(_rate, oldRate))
{
_rateTransposer.SetRate(_rate);
}
if (!TestFloatEqual(_tempo, oldTempo))
{
_stretch.SetTempo(_tempo);
}
#if !SOUNDTOUCH_PREVENT_CLICK_AT_RATE_CROSSOVER
if (_rate <= 1.0)
{
if (Output != _stretch)
{
Debug.Assert(Output == _rateTransposer);
// move samples in the current output buffer to the output of pTDStretch
var tempOut = _stretch.GetOutput();
tempOut.MoveSamples(Output);
// move samples in pitch transposer's store buffer to tempo changer's input
_stretch.MoveSamples(_rateTransposer.GetStore());
Output = _stretch;
}
}
else
#endif
if (Output != _rateTransposer)
{
Debug.Assert(Output == _stretch);
// move samples in the current output buffer to the output of pRateTransposer
var transOut = _rateTransposer.GetOutput();
transOut.MoveSamples(Output);
// move samples in tempo changer's input to pitch transposer's input
_rateTransposer.MoveSamples(_stretch.GetInput());
Output = _rateTransposer;
}
}
