/// <summary>
/// Retrieves the current time position for playback.
/// </summary>
/// <param name="formatType">One of the <see cref="TimeFormatTypes"/> enumerated values, except Smpte.</param>
/// <returns>Returns the current time in the requested time <paramref name="formatType"/>.
/// When the value is negative, the requested time <paramref name="formatType"/> was not supported
/// and the return value specifies the proposed time format type (as a negative value).</returns>
public long GetTime(TimeFormatTypes formatType)
{
ThrowIfDisposed();
if (formatType == TimeFormatTypes.Smpte)
{
throw new InvalidOperationException(
Properties.Resources.MidiStreamOutPort_InvalidTimeFormatType);
}
MmTime time = new MmTime();
time.Type = (uint)formatType;
this.GetTime(ref time);
if (time.Type == (uint)formatType)
{
// for all types (except Smpte) same field is used.
return(time.Ticks);
}
else
{
// return the supported time format as error
return(-time.Type);
}
}
/// <summary>
/// Gets the current time position from the port.
/// </summary>
/// <param name="time">A reference to the time structure that receives the value.</param>
private void GetTime(ref MmTime time)
{
int result = NativeMethods.midiStreamPosition(
MidiSafeHandle,
ref time,
(uint)MemoryUtil.SizeOfMmTime);
ThrowIfError(result);
}
public static extern int midiStreamPosition(MidiSafeHandle handle, ref MmTime time, uint sizeOfMmTime);