void TestRate()
{
int hr;
double rate;
hr = m_mediaPosition.get_Rate(out rate);
DsError.ThrowExceptionForHR(hr);
Debug.Assert(rate > 0 && rate < 2, "get_Rate");
hr = m_mediaPosition.put_Rate(2.0);
DsError.ThrowExceptionForHR(hr);
hr = m_mediaPosition.get_Rate(out rate);
DsError.ThrowExceptionForHR(hr);
Debug.Assert(rate > 1 && rate < 3, "get_Rate");
hr = m_mediaPosition.put_Rate(1.0);
DsError.ThrowExceptionForHR(hr);
}
/// <summary>
/// Modify the playback rate.
/// </summary>
/// <param name="dRateAdjust">The rate to adjust by.</param>
private void ModifyRate(double dRateAdjust)
{
int hr = 0;
double dRate;
// If the IMediaPosition interface exists, use it to set rate
if ((_mediaPosition != null) && (dRateAdjust != 0.0))
{
hr = _mediaPosition.get_Rate(out dRate);
if (hr == 0)
{
// Add current rate to adjustment value
double dNewRate = dRate + dRateAdjust;
hr = _mediaPosition.put_Rate(dNewRate);
// Save global rate
if (hr == 0)
{
_currentPlaybackRate = dNewRate;
}
}
}
}
void ModifyRate(double rateAdjust)
{
try
{
if ((mediaPos == null) || (rateAdjust == 0.0))
{
return;
}
double rate;
int hr = mediaPos.get_Rate(out rate);
if (hr < 0)
{
return;
}
rate += rateAdjust;
hr = mediaPos.put_Rate(rate);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}