private void Reposition(long desiredPosition)
{
long nsPosition = (10000000L * repositionTo) / waveFormat.AverageBytesPerSecond;
var pv = PropVariant.FromLong(nsPosition);
// should pass in a variant of type VT_I8 which is a long containing time in 100nanosecond units
pReader.SetCurrentPosition(Guid.Empty, ref pv);
decoderOutputCount = 0;
decoderOutputOffset = 0;
position = desiredPosition;
repositionTo = -1;// clear the flag
}
/// <summary>
/// Seeks to a new position in the media source.
/// </summary>
/// <param name="sourceReader">A valid IMFSourceReader instance.</param></param></param>
/// <param name="position">The position from which playback will be started.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult SetCurrentPosition(this IMFSourceReader sourceReader, TimeSpan position)
{
if (sourceReader == null)
{
throw new ArgumentNullException("sourceReader");
}
using (PropVariant value = new PropVariant(position.Ticks))
{
return(sourceReader.SetCurrentPosition(Guid.Empty, value));
}
}
private void Reposition(long desiredPosition)
{
long nsPosition = (10000000L * repositionTo) / waveFormat.AverageBytesPerSecond;
var pv = PropVariant.FromLong(nsPosition);
var ptr = Marshal.AllocHGlobal(Marshal.SizeOf(pv));
Marshal.StructureToPtr(pv, ptr, false);
// should pass in a variant of type VT_I8 which is a long containing time in 100nanosecond units
pReader.SetCurrentPosition(Guid.Empty, ptr);
Marshal.FreeHGlobal(ptr);
decoderOutputCount = 0;
decoderOutputOffset = 0;
position = desiredPosition;
repositionTo = -1;// clear the flag
}
