//this gets called from the soundcard
public int Read(byte[] buffer, int offset, int count)
{
var channels = WaveFormat.Channels;
int samplesNeeded = count / (4*channels);
WaveBuffer wb = new WaveBuffer(buffer);
//fix buffer size
FMixerBuffer = BufferHelpers.Ensure(FMixerBuffer, samplesNeeded);
//empty buffer
wb.Clear();
lock(FSourceLock)
{
//first notify to prepare for buffer
foreach(var notify in FNotifys)
{
try
{
notify.NotifyProcess(samplesNeeded);
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.Message);
System.Diagnostics.Debug.WriteLine(e.Source);
System.Diagnostics.Debug.WriteLine(e.StackTrace);
}
}
//evaluate the sinks,
//e.g. buffer writers should write first to have the latest data in the buffer storage
foreach(var sink in FSinks)
{
try
{
sink.Read(offset / 4, samplesNeeded);
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.Message);
System.Diagnostics.Debug.WriteLine(e.Source);
System.Diagnostics.Debug.WriteLine(e.StackTrace);
}
}
//evaluate the inputs
var inputCount = FSources.Count;
for (int i = 0; i < inputCount; i++)
{
try
{
if (FSources[i].Signal != null)
{
//starts the calculation of the audio graph
FSources[i].Signal.Read(FMixerBuffer, offset / 4, samplesNeeded);
var chan = FSources[i].Channel % channels;
//add to output buffer
for (int j = 0; j < samplesNeeded; j++)
{
wb.FloatBuffer[j * channels + chan] += FMixerBuffer[j];
FMixerBuffer[j] = 0;
}
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e.Message);
System.Diagnostics.Debug.WriteLine(e.Source);
System.Diagnostics.Debug.WriteLine(e.StackTrace);
}
}
//tell the engine that reading has finished
FReadingFinished(samplesNeeded);
}
return count; //always run
}
//this is called from the soundcard
public int Read(byte[] buffer, int offset, int count)
{
int samplesNeeded = count / 4;
WaveBuffer wb = new WaveBuffer(buffer);
//fix buffer size
FMixerBuffer = BufferHelpers.Ensure(FMixerBuffer, samplesNeeded);
//empty buffer
wb.Clear();
lock(source)
{
var inputCount = source.Count;
//var invCount = 1.0f/inputCount;
for(int i=0; i<inputCount; i++)
{
if(source[i] != null)
{
//starts the calculation of the audio graph
source[i].Read(FMixerBuffer, offset / 4, samplesNeeded);
//add to output buffer
for(int j=0; j<samplesNeeded; j++)
{
wb.FloatBuffer[j] += FMixerBuffer[j];
FMixerBuffer[j] = 0;
}
}
}
//tell the engine that reading has finished
FReadingFinished();
}
return count; //always run
}
