/// <summary>Callback function for handling recording process information.</summary>
/// <param name="hdrvr">Audio input device handler.</param>
/// <param name="uMsg">WIM_CLOSE, WIM_DONE, WIM_OPEN</param>
/// <param name="dwUser">Additional data for clients use.</param>
/// <param name="wavhdr">Wave Header.</param>
/// <param name="dwParam2">Additional parameter.</param>
internal static void WaveInProc(IntPtr hdrvr, int uMsg, int dwUser, ref WaveHDR wavhdr, int dwParam2)
{
if (uMsg == MM_WIM_DATA)
{
try
{
GCHandle h = (GCHandle)wavhdr.dwUser;
WaveInBuffer buf = (WaveInBuffer)h.Target;
buf._OnCompleted();
}
catch (Exception ex)
{
throw ex;
}
}
}
/// <summary>
/// Free the internal buffers.
/// </summary>
private void _FreeBuffers()
{
_currentBuffer = null;
if (_buffers != null)
{
WaveInBuffer first = _buffers;
_buffers = null;
WaveInBuffer current = first;
do
{
WaveInBuffer Next = current.NextBuffer;
current.Dispose();
current = Next;
} while (current != first);
}
}
/// <summary>
/// Allocate internal buffers.
/// </summary>
/// <param name="bufferSize">Size of buffer.</param>
/// <param name="bufferCount">Number of buffers to allocate.</param>
private void _AllocateBuffers(uint bufferSize, uint bufferCount)
{
_FreeBuffers();
if (bufferCount > 0)
{
_buffers = new WaveInBuffer(_pWaveIn, bufferSize);
WaveInBuffer Prev = _buffers;
try
{
for (int i = 1; i < bufferCount; i++)
{
WaveInBuffer Buf = new WaveInBuffer(_pWaveIn, bufferSize);
Prev.NextBuffer = Buf;
Prev = Buf;
}
}
finally
{
Prev.NextBuffer = _buffers;
}
}
}
/// <summary>
/// Select next internal buffer.
/// </summary>
private void _SelectNextBuffer()
{
_currentBuffer = _currentBuffer == null ? _buffers : _currentBuffer.NextBuffer;
}
/// <summary>
/// Free the internal buffers.
/// </summary>
private void _FreeBuffers()
{
_currentBuffer = null;
if (_buffers != null)
{
WaveInBuffer first = _buffers;
_buffers = null;
WaveInBuffer current = first;
do
{
WaveInBuffer Next = current.NextBuffer;
current.Dispose();
current = Next;
} while (current != first);
}
}
/// <summary>
/// Allocate internal buffers.
/// </summary>
/// <param name="bufferSize">Size of buffer.</param>
/// <param name="bufferCount">Number of buffers to allocate.</param>
private void _AllocateBuffers(uint bufferSize, uint bufferCount)
{
_FreeBuffers();
if (bufferCount > 0)
{
_buffers = new WaveInBuffer(_pWaveIn, bufferSize);
WaveInBuffer Prev = _buffers;
try
{
for (int i = 1; i < bufferCount; i++)
{
WaveInBuffer Buf = new WaveInBuffer(_pWaveIn, bufferSize);
Prev.NextBuffer = Buf;
Prev = Buf;
}
}
finally
{
Prev.NextBuffer = _buffers;
}
}
}