private void TestParamInfo()
{
int hr;
ParamInfo pInfo = new ParamInfo();
hr = m_impi.GetParamInfo(0, out pInfo);
DMOError.ThrowExceptionForHR(hr);
Debug.Assert(pInfo.szUnitText == "%", "GetParamInfo");
}
private TabPage SetDMOParams()
{
int hr;
// create the tab page and the layout grid
TabPage tp = new TabPage("DMO Parameters");
TableLayoutPanel tl = new TableLayoutPanel();
tl.Dock = DockStyle.Top;
tl.ColumnCount = 2;
tl.AutoSizeMode = AutoSizeMode.GrowOnly;
tl.AutoSize = true;
tp.Controls.Add(tl);
IMediaParamInfo paramInfo = this._dsfilternode._filter as IMediaParamInfo;
if (paramInfo == null)
{
Resizable = false;
InternalControl.Visible = false;
return(tp);
}
IMediaParams m_param = this._dsfilternode._filter as IMediaParams;
hr = paramInfo.GetParamCount(out _dmoPropertyCount);
DMOError.ThrowExceptionForHR(hr);
tl.RowCount = _dmoPropertyCount;
// Walk all the parameters
for (int pCur = 0; pCur < _dmoPropertyCount; pCur++)
{
ParamInfo pInfo;
IntPtr ip;
hr = paramInfo.GetParamInfo(pCur, out pInfo);
DMOError.ThrowExceptionForHR(hr);
hr = paramInfo.GetParamText(pCur, out ip);
DMOError.ThrowExceptionForHR(hr);
string sName, sUnits;
string[] sEnum;
try
{
ParseParamText(ip, out sName, out sUnits, out sEnum);
}
finally
{
Marshal.FreeCoTaskMem(ip);
}
Label l = new Label();
l.Text = pInfo.szLabel;
tl.Controls.Add(l);
switch (pInfo.mpType)
{
case MPType.BOOL:
{
tl.Controls.Add(new DMOBoolParam(m_param, pCur, pInfo));
}
break;
case MPType.ENUM:
{
tl.Controls.Add(new DMOEnumParam(sEnum, m_param, pCur, pInfo));
}
break;
case MPType.FLOAT:
{
tl.Controls.Add(new DMONumericalParam(m_param, pCur, pInfo));
}
break;
case MPType.INT:
{
tl.Controls.Add(new DMONumericalParam(m_param, pCur, pInfo));
}
break;
case MPType.MAX:
{
tl.Controls.Add(new Label());
}
break;
default:
break;
}
}
for (int i = 0; i < tl.RowCount; i++)
{
tl.RowStyles.Add(new RowStyle(SizeType.Absolute, 23f));
}
tl.ColumnStyles.Add(new ColumnStyle(SizeType.AutoSize));
tl.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, .5f));
return(tp);
}
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);
}
