private void TestTimeFormats()
{
int hr;
int i;
Guid g;
Guid g2;
int t;
hr = m_impi.GetNumTimeFormats(out i);
DMOError.ThrowExceptionForHR(hr);
Debug.Assert(i == 1, "GetNumTimeFormats");
hr = m_impi.GetCurrentTimeFormat(out g, out t);
DMOError.ThrowExceptionForHR(hr);
Debug.Assert(g == MediaParamTimeFormat.Reference, "GetCurrentTimeFormat");
for (int x = 0; x < i; x++)
{
hr = m_impi.GetSupportedTimeFormat(x, out g2);
DMOError.ThrowExceptionForHR(hr);
Debug.Assert(g2 == MediaParamTimeFormat.Reference, "GetSupportedTimeFormat");
}
}
private void SetDMOParams(IBaseFilter dmoWrapperFilter)
{
int hr;
Guid g;
int i;
int pc;
ParamInfo pInfo;
IMediaParamInfo paramInfo = dmoWrapperFilter as IMediaParamInfo;
// With a little effort, a generic parameter handling routine
// could be produced. You know the number of parameters (GetParamCount),
// the type of the parameter (pInfo.mpType), the range of values for
// int and float (pInfo.mpdMinValue, pInfo.mpdMaxValue), if the parameter is an
// enum, you have the strings (GetParamText).
hr = paramInfo.GetParamCount(out pc);
DMOError.ThrowExceptionForHR(hr);
// Walk all the parameters
for (int pCur = 0; pCur < pc; pCur++)
{
IntPtr ip;
hr = paramInfo.GetParamInfo(pCur, out pInfo);
DMOError.ThrowExceptionForHR(hr);
hr = paramInfo.GetParamText(0, out ip);
DMOError.ThrowExceptionForHR(hr);
try
{
string sName, sUnits;
string [] sEnum;
ParseParamText(ip, out sName, out sUnits, out sEnum);
Debug.WriteLine(string.Format("Parameter name: {0}", sName));
Debug.WriteLine(string.Format("Parameter units: {0}", sUnits));
// Not all params will have enumerated strings.
if (pInfo.mpType == MPType.ENUM)
{
// The final entry in "splitted" will be a blank (used to terminate the list).
for (int x = 0; x < sEnum.Length; x++)
{
Debug.WriteLine(string.Format("Parameter Enum strings: {0} = {1}", x, sEnum[x]));
}
}
}
finally
{
Marshal.FreeCoTaskMem(ip);
}
}
hr = paramInfo.GetCurrentTimeFormat(out g, out i);
DMOError.ThrowExceptionForHR(hr);
hr = paramInfo.GetSupportedTimeFormat(0, out g);
DMOError.ThrowExceptionForHR(hr);
MPData o = new MPData();
m_param = dmoWrapperFilter as IMediaParams;
o.vInt = 0;
hr = m_param.SetParam(0, o);
DMOError.ThrowExceptionForHR(hr);
}