private void InternalStop()
{
if (!IsInitialized)
ThrowException(Res.SndRecException_Uninitialized);
if (!IsWorking && !IsPaused)
return; // do nothing
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(API.MCI_GENERIC_PARMS)));
Marshal.StructureToPtr(_parmsGeneric, ptr, false);
_err = API.mciSendCommand(_deviceID, API.MCI_STOP, (API.MCI_WAIT), ptr);
Marshal.FreeHGlobal(ptr);
if (0 != _err)
ThrowException(_err);
_status = SndStatus.Normal;
}
private void InternalStart(int length, bool async)
{
if (!IsInitialized)
ThrowException(Res.SndRecException_Uninitialized);
if (length < 0)
ThrowException(new ArgumentOutOfRangeException("length", Properties.Resources.ArgumentOutOfRangeException_Length));
if (length > 0)
_parmsRecord.dwTo = (uint)length;
_parmsRecord.dwTo = (uint)length;
_parmsRecord.dwCallback = _handle;
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(API.MCI_RECORD_PARMS)));
Marshal.StructureToPtr(_parmsRecord, ptr, false);
_err = API.mciSendCommand(_deviceID, API.MCI_RECORD, (length != 0 ? API.MCI_NOTIFY : 0) | (async ? 0 : API.MCI_WAIT) | (length > 0 ? API.MCI_TO : 0), ptr);
Marshal.FreeHGlobal(ptr);
if (0 != _err)
ThrowException(_err);
_status = SndStatus.Working;
}
private void InternalResume()
{
if (!IsInitialized)
ThrowException(Res.SndRecException_Uninitialized);
if (!IsPaused)
ThrowException(Res.SndRecException_InvalidOperation);
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(API.MCI_GENERIC_PARMS)));
Marshal.StructureToPtr(_parmsGeneric, ptr, false);
_err = API.mciSendCommand(_deviceID, API.MCI_RESUME, (API.MCI_WAIT), ptr);
Marshal.FreeHGlobal(ptr);
if (0 != _err)
ThrowException(_err);
_status = SndStatus.Working;
}
private void InternalInitialize()
{
_parmsOpen.wDeviceID = 0;
_parmsOpen.lpstrDeviceType = Marshal.StringToHGlobalAnsi(API.WaveAudio);
_parmsOpen.lpstrElementName = Marshal.StringToHGlobalAnsi(String.Empty);
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(API.MCI_OPEN_PARMS)));
Marshal.StructureToPtr(_parmsOpen, ptr, false);
_err = API.mciSendCommand(0, API.MCI_OPEN, API.MCI_WAIT | API.MCI_OPEN_TYPE | API.MCI_OPEN_ELEMENT, ptr);
_parmsOpen = (API.MCI_OPEN_PARMS)Marshal.PtrToStructure(ptr, typeof(API.MCI_OPEN_PARMS));
Marshal.FreeHGlobal(_parmsOpen.lpstrDeviceType);
Marshal.FreeHGlobal(_parmsOpen.lpstrElementName);
if (0 != _err)
ThrowException(_err);
_deviceID = _parmsOpen.wDeviceID;
_status = SndStatus.Normal;
}
private void InternalClose()
{
if (!IsInitialized)
return;
if (IsWorking || IsPaused)
Stop();
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(API.MCI_GENERIC_PARMS)));
Marshal.StructureToPtr(_parmsGeneric, ptr, false);
_err = API.mciSendCommand(_deviceID, API.MCI_CLOSE, (API.MCI_WAIT), ptr);
Marshal.FreeHGlobal(ptr);
if (0 != _err)
ThrowException(_err);
_status = SndStatus.Uninitialized;
}
private void InternalStart(bool async)
{
if (!IsInitialized)
ThrowException(Res.SndRecException_Uninitialized);
_parmsPlay.dwCallback = _handle;
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(API.MCI_PLAY_PARMS)));
Marshal.StructureToPtr(_parmsPlay, ptr, false);
_err = API.mciSendCommand(_deviceID, API.MCI_PLAY, (async ? API.MCI_NOTIFY : API.MCI_WAIT), ptr);
Marshal.FreeHGlobal(ptr);
if (0 != _err)
ThrowException(_err);
_status = SndStatus.Working;
}
