/// <summary>
/// Allocates the unmanaged memory for the midi headers and buffers.
/// </summary>
private void AllocateBuffers()
{
if (this.BufferSize > 0 && this.BufferCount > 0)
{
this.memHeaders = MemoryUtil.Alloc(MemoryUtil.SizeOfMidiHeader * this.BufferCount);
this.memBuffers = MemoryUtil.Alloc(this.BufferSize * this.BufferCount);
GC.AddMemoryPressure((MemoryUtil.SizeOfMidiHeader + this.BufferSize) * this.BufferCount);
IntPtr headerMem = IntPtr.Add(this.memHeaders, 0);
IntPtr bufferMem = IntPtr.Add(this.memBuffers, 0);
for (int i = 0; i < this.BufferCount; i++)
{
var buffer = new MidiBufferStream(headerMem, bufferMem, this.BufferSize, this.StreamAccess);
try
{
this.unusedBuffers.Enqueue(buffer);
this.mapBuffers.Add(headerMem, buffer);
headerMem = IntPtr.Add(headerMem, MemoryUtil.SizeOfMidiHeader);
bufferMem = IntPtr.Add(bufferMem, this.BufferSize);
}
catch
{
buffer.Dispose();
throw;
}
}
}
}
