public override void GetNextAudioBlock(ref AudioSourceChannelInfo bufferToFill)
{
var amplitude = _amplitude;
var frequency = _frequency;
var phasePerSample = (2.0f * frequency) / _sampleRate;
var currentPhase = _currentPhase;
var channels = bufferToFill.Buffer.Channels;
var numSamples = bufferToFill.NumSamples;
for (var i = 0; i < numSamples; ++i)
{
var sample = amplitude * (float)Math.Sin(currentPhase * (float)Math.PI);
for (var j = bufferToFill.Buffer.NumChannels; --j >= 0;)
{
channels[j][bufferToFill.StartSample + i] = sample;
}
currentPhase += phasePerSample;
if (currentPhase > 1)
{
currentPhase -= 2;
}
}
_currentPhase = currentPhase;
}
public override void GetNextAudioBlock(ref AudioSourceChannelInfo bufferToFill)
{
foreach (var item in _chain)
{
item.GetNextAudioBlock(ref bufferToFill);
}
}
public AudioSourceChannelInfo SetupGainBuffer(ref AudioSourceChannelInfo bufferToFill)
{
for (var channel = 0; channel < bufferToFill.Buffer.NumChannels; ++channel)
{
GainAmpBuffer.Channels[channel + 1] = bufferToFill.Buffer.Channels[channel];
}
return(new AudioSourceChannelInfo(GainAmpBuffer, bufferToFill.StartSample, bufferToFill.NumSamples));
}
public void GetNextAudioBlock(ref AudioSourceChannelInfo bufferToFill)
{
// commit commands from the ui
_beatSeqencer.Sequencer.StartFrame(_sampleTime);
_env1.GetNextAudioBlock(_bufferPool.Env1Buffer, bufferToFill.StartSample, bufferToFill.NumSamples);
// TestBuffer(_bufferPool.Env1Buffer, bufferToFill.StartSample, bufferToFill.NumSamples);
_generator.GetNextAudioBlock(ref bufferToFill);
// TestBuffer(bufferToFill.Buffer, bufferToFill.StartSample, bufferToFill.NumSamples);
var gainChannelInfo = _bufferPool.SetupGainBuffer(ref bufferToFill);
_gainAmp.GetNextAudioBlock(ref gainChannelInfo);
_sampleTime += bufferToFill.NumSamples;
}
public void AudioDeviceIOCallback(float *[] inputChannelData, int numInputChannels, float *[] outputChannelData, int numOutputChannels, int numSamples)
{
if (_source != null)
{
if (numInputChannels > numOutputChannels)
{
throw new NotImplementedException();
}
var numActiveChans = 0;
var channelSize = numSamples * sizeof(float);
for (var i = 0; i < numInputChannels; ++i)
{
_channels[numActiveChans] = outputChannelData[i];
Memory.MemCopy(_channels[numActiveChans], inputChannelData[i], channelSize);
++numActiveChans;
}
for (var i = 0; i < numOutputChannels; ++i)
{
_channels[numActiveChans] = outputChannelData[i];
Memory.ZeroMem <float>(_channels[numActiveChans], numSamples);
++numActiveChans;
}
_renderBuffer.Wrap(_channels, numActiveChans, numSamples);
var info = new AudioSourceChannelInfo(_renderBuffer, 0, numSamples);
_source.GetNextAudioBlock(ref info);
for (var i = 0; i < numOutputChannels; ++i)
{
SIMD.Mul(outputChannelData[i], _gain, outputChannelData[i], numSamples);
}
}
else
{
for (var i = 0; i < numOutputChannels; ++i)
{
Memory.ZeroMem <float>(outputChannelData[i], numSamples);
}
}
}
public void GetNextAudioBlock(ref AudioSourceChannelInfo bufferToFill)
{
var buffer = bufferToFill.Buffer;
for (var i = 1; i < buffer.NumChannels; ++i)
{
// for (var j = 0; j < bufferToFill.NumSamples; ++j)
// {
// buffer.Channels[i][bufferToFill.StartSample + j] *= buffer.Channels[0][bufferToFill.StartSample + j];
// }
SIMD.Mul(
buffer.GetPointer(0, bufferToFill.StartSample),
buffer.GetPointer(i, bufferToFill.StartSample),
buffer.GetPointer(i, bufferToFill.StartSample),
bufferToFill.NumSamples
);
}
}
public abstract void GetNextAudioBlock(ref AudioSourceChannelInfo bufferToFill);
