private void TestMarkerCount()
{
int hr;
int i;
hr = m_es.get_MarkerCount(out i);
DsError.ThrowExceptionForHR(hr);
Debug.Assert(i == 3, "Count");
}
protected virtual void EnumerateChapters(bool forceRefresh)
{
if (_graphBuilder == null || !_initialized || !forceRefresh && _chapterTimestamps != null)
{
return;
}
// Try to find a filter implementing IAMExtendSeeking for chapter support
IAMExtendedSeeking extendSeeking = FilterGraphTools.FindFilterByInterface <IAMExtendedSeeking>(_graphBuilder);
if (extendSeeking == null)
{
return;
}
try
{
int markerCount;
if (extendSeeking.get_MarkerCount(out markerCount) != 0 || markerCount <= 0)
{
return;
}
_chapterTimestamps = new double[markerCount];
_chapterNames = new string[markerCount];
for (int i = 1; i <= markerCount; i++)
{
double markerTime;
string markerName;
extendSeeking.GetMarkerTime(i, out markerTime);
extendSeeking.GetMarkerName(i, out markerName);
_chapterTimestamps[i - 1] = markerTime;
_chapterNames[i - 1] = !string.IsNullOrEmpty(markerName) ? markerName : GetChapterName(i);
}
}
finally
{
Marshal.ReleaseComObject(extendSeeking);
}
}