/// <summary>
/// Creates the buffers for playing.
/// </summary>
/// <param name="numberOfOutputChannels">The number of outputs channels.</param>
/// <param name="numberOfInputChannels">The number of input channel.</param>
/// <param name="useMaxBufferSize">if set to <c>true</c> [use max buffer size] else use Prefered size</param>
public int CreateBuffers(int numberOfOutputChannels, int numberOfInputChannels, bool useMaxBufferSize)
{
if (numberOfOutputChannels < 0 || numberOfOutputChannels > capability.NbOutputChannels)
{
throw new ArgumentException(String.Format(
"Invalid number of channels {0}, must be in the range [0,{1}]",
numberOfOutputChannels, capability.NbOutputChannels));
}
if (numberOfInputChannels < 0 || numberOfInputChannels > capability.NbInputChannels)
{
throw new ArgumentException("numberOfInputChannels",
String.Format("Invalid number of input channels {0}, must be in the range [0,{1}]",
numberOfInputChannels, capability.NbInputChannels));
}
// each channel needs a buffer info
this.numberOfOutputChannels = numberOfOutputChannels;
this.numberOfInputChannels = numberOfInputChannels;
// Ask for maximum of output channels even if we use only the nbOutputChannelsArg
int nbTotalChannels = capability.NbInputChannels + capability.NbOutputChannels;
bufferInfos = new ASIOBufferInfo[nbTotalChannels];
currentOutputBuffers = new IntPtr[numberOfOutputChannels];
currentInputBuffers = new IntPtr[numberOfInputChannels];
// and do the same for output channels
// ONLY work on output channels (just put isInput = true for InputChannel)
int totalIndex = 0;
for (int index = 0; index < capability.NbInputChannels; index++, totalIndex++)
{
bufferInfos[totalIndex].isInput = true;
bufferInfos[totalIndex].channelNum = index;
bufferInfos[totalIndex].pBuffer0 = IntPtr.Zero;
bufferInfos[totalIndex].pBuffer1 = IntPtr.Zero;
}
for (int index = 0; index < capability.NbOutputChannels; index++, totalIndex++)
{
bufferInfos[totalIndex].isInput = false;
bufferInfos[totalIndex].channelNum = index;
bufferInfos[totalIndex].pBuffer0 = IntPtr.Zero;
bufferInfos[totalIndex].pBuffer1 = IntPtr.Zero;
}
if (useMaxBufferSize)
{
// use the drivers maximum buffer size
bufferSize = capability.BufferMaxSize;
}
else
{
// use the drivers preferred buffer size
bufferSize = capability.BufferPreferredSize;
}
unsafe
{
fixed(ASIOBufferInfo *infos = &bufferInfos[0])
{
IntPtr pOutputBufferInfos = new IntPtr(infos);
// Create the ASIO Buffers with the callbacks
driver.createBuffers(pOutputBufferInfos, nbTotalChannels, bufferSize, ref callbacks);
}
}
// Check if outputReady is supported
isOutputReadySupported = (driver.outputReady() == ASIOError.ASE_OK);
return(bufferSize);
}
