/// <summary>
/// See if the specified parameter value falls within the allowable range
/// </summary>
/// <param name="m">Value to check</param>
/// <returns>true if the parameter value is valid</returns>
private bool CheckRange(MPData m)
{
bool bRet;
switch (m_DataType)
{
case MPType.BOOL:
case MPType.ENUM:
case MPType.INT:
bRet = (m.vInt >= m_MinVal.vInt && m.vInt <= m_MaxVal.vInt);
break;
case MPType.FLOAT:
bRet = (m.vFloat >= m_MinVal.vFloat && m.vFloat <= m_MaxVal.vFloat);
break;
default:
Debug.Assert(false, "Invalid Type");
bRet = false;
break;
}
return bRet;
}
private void SetDMOParams(DirectShowLib.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);
}
public MPEnvelopes(MPData iDefaultValue, MPCaps iValidCaps, MPType mt, MPData min, MPData max)
{
// Store the neutralValue, min/max value range, data type and supported curve types
m_DefaultValue = iDefaultValue;
m_ValidCaps = (int)iValidCaps;
m_DataType = mt;
m_MinVal = min;
m_MaxVal = max;
// Create an array to hold the segments (size = 3 was chosen arbitrarily)
m_Envelope = new ArrayList(3);
// Create one segment that spans all time containing the default values
MPEnvelopeSegment e = new MPEnvelopeSegment();
e.flags = MPFlags.BeginNeutralVal;
e.iCurve = MPCaps.Jump;
e.rtStart = 0;
e.rtEnd = MAX_TIME;
e.valStart = m_DefaultValue;
e.valEnd = m_DefaultValue;
m_Envelope.Add(e);
}
/// <summary>
/// Calculate the parameter value at a specified time
///
/// While there are routines written for all the curve types, I'm not enough
/// of a math whiz to feel comfortable that I got it right. I stole the code
/// from elsewhere and converted it to c#, so there's a chance I messed up.
/// </summary>
/// <param name="rt">Time at which to calculate</param>
/// <returns>MPData value for that time based in the specified Curve</returns>
public MPData CalcValueForTime(long rt)
{
long ir, ic;
float p;
MPData ret;
MPEnvelopeSegment m = FindEnvelopeForTime(rt);
switch(m.iCurve)
{
case MPCaps.Jump:
// Not quite sure how I want to do this. Consider an envelope
// that goes from time 0 to 10, and value 55 to 99. Obviously
// at time 0, you return 55. At times 1 thru 9, I assume you
// also return 55 (although one could argue they should return
// 99). At time 10, you return 99.
// If you never have a timestamp that exactly equals 10, you
// would never get the new value. Seems odd. Well, that's
// how I've written it, anyway.
if (rt < m.rtEnd)
{
ret = m.valStart;
}
else
{
ret = m.valEnd;
}
break;
case MPCaps.Linear:
ir = m.rtEnd - m.rtStart;
ic = rt - m.rtStart;
p = ic / ir;
ret = new MPData();
if (m_DataType == MPType.FLOAT)
{
ret.vFloat = (m.valEnd.vFloat - m.valStart.vFloat) * p;
}
else
{
ret.vInt = (int)((m.valEnd.vInt - m.valStart.vInt) * p);
}
break;
case MPCaps.InvSquare:
ir = m.rtEnd - m.rtStart;
ic = rt - m.rtStart;
p = ic / ir;
p = (float)Math.Sqrt(p);
ret = new MPData();
if (m_DataType == MPType.FLOAT)
{
ret.vFloat = (m.valEnd.vFloat - m.valStart.vFloat) * p;
}
else
{
ret.vInt = (int)((m.valEnd.vInt - m.valStart.vInt) * p);
}
break;
case MPCaps.Sine:
ir = m.rtEnd - m.rtStart;
ic = rt - m.rtStart;
p = ic / ir;
p = (float)((Math.Sin(p * Math.PI - (Math.PI/2)) + 1) / 2);
ret = new MPData();
if (m_DataType == MPType.FLOAT)
{
ret.vFloat = (m.valEnd.vFloat - m.valStart.vFloat) * p;
}
else
{
ret.vInt = (int)((m.valEnd.vInt - m.valStart.vInt) * p);
}
break;
case MPCaps.Square:
ir = m.rtEnd - m.rtStart;
ic = rt - m.rtStart;
p = ic / ir;
p = p * p;
ret = new MPData();
if (m_DataType == MPType.FLOAT)
{
ret.vFloat = (m.valEnd.vFloat - m.valStart.vFloat) * p;
}
else
{
ret.vInt = (int)((m.valEnd.vInt - m.valStart.vInt) * p);
}
break;
default:
Debug.Assert(false, "Invalid flag!");
ret = new MPData();
break;
}
return ret;
}
/// <summary>
/// COM entry point for IMediaParams.GetParam
/// </summary>
/// <remarks>
/// There should be no need to modify or override this method. See
/// <see cref="IMediaObjectImpl.ParamDefine"/> and <see cref="IMediaObjectImpl.ParamCalcValueForTime"/>
/// for details about how this works.
/// </remarks>
public int GetParam(int dwParamIndex, out MPData pValue)
{
int hr;
try
{
lock(this)
{
m_Log.Write("GetParam\r\n");
// If the requested parameter is within range
if (dwParamIndex < m_Params.Parms.Length && dwParamIndex >= 0)
{
// Read the value
pValue = m_Params.Envelopes[dwParamIndex].CalcValueForTime(InternalGetCurrentTime());
hr = S_OK;
}
else
{
pValue = new MPData();
hr = E_INVALIDARG;
}
}
}
catch (Exception e)
{
// Generic handling of all exceptions. While .NET will turn exceptions into
// HRESULTS "automatically", I prefer to have some place I can set a breakpoint.
hr = CatFail(e);
// Have to have this to make the compiler happy.
pValue = new MPData();
}
return hr;
}
/// <summary>
/// COM entry point for IMediaParams.SetParam
/// </summary>
/// <remarks>
/// There should be no need to modify or override this method. See
/// <see cref="IMediaObjectImpl.ParamDefine"/> and <see cref="IMediaObjectImpl.ParamCalcValueForTime"/>
/// for details about how this works.
/// </remarks>
public int SetParam(int dwParamIndex, MPData value)
{
int hr;
try
{
lock(this)
{
m_Log.Write("SetParam\r\n");
// Check to see if the index is in range
if (dwParamIndex < m_Params.Parms.Length && dwParamIndex >= 0)
{
// Make an envelope that spans from current to end of stream
MPEnvelopeSegment m = new MPEnvelopeSegment();
m.flags = MPFlags.Standard;
m.iCurve = MPCaps.Jump;
m.rtStart = 0;
m.rtEnd = long.MaxValue;
m.valStart = value;
m.valEnd = value;
// Add the struct to the envelope
hr = m_Params.Envelopes[dwParamIndex].AddSegment(m);
}
else
{
hr = E_INVALIDARG;
}
}
}
catch (Exception e)
{
// Generic handling of all exceptions. While .NET will turn exceptions into
// HRESULTS "automatically", I prefer to have some place I can set a breakpoint.
hr = CatFail(e);
}
return hr;
}
/// <summary>
/// See if the specified parameter value falls within the allowable range
/// </summary>
/// <param name="m">Value to check</param>
/// <returns>true if the parameter value is valid</returns>
private bool CheckRange(MPData m)
{
bool returnValue;
switch (this.dataType)
{
case MPType.BOOL:
case MPType.ENUM:
case MPType.INT:
returnValue = m.vInt >= this.minValue.vInt && m.vInt <= this.maxValue.vInt;
break;
case MPType.FLOAT:
returnValue = m.vFloat >= this.minValue.vFloat && m.vFloat <= this.maxValue.vFloat;
break;
default:
Debug.Assert(false, "Invalid Type");
returnValue = false;
break;
}
return returnValue;
}
///////////////////////////////////////////////////////////////////////////////
// Construction and Initializing methods //
///////////////////////////////////////////////////////////////////////////////
#region CONSTRUCTION
/// <summary>
/// Initializes a new instance of the MPEnvelopes class.
/// </summary>
/// <param name="newDefaultValue">An <see cref="MPData"/> with the default value</param>
/// <param name="newValidCaps">The valid capabilities</param>
/// <param name="newMPType">The <see cref="MPType"/> of the envelope.</param>
/// <param name="newMinValue">The <see cref="MPData"/> with the minimal value for the envelope.</param>
/// <param name="newMaxValue">The <see cref="MPData"/> with the maximal value for the envelope.</param>
public MPEnvelopes(
MPData newDefaultValue,
MPCaps newValidCaps,
MPType newMPType,
MPData newMinValue,
MPData newMaxValue)
{
// Store the neutralValue, min/max value range, data type and supported curve types
this.defaultValue = newDefaultValue;
this.validCaps = (int)newValidCaps;
this.dataType = newMPType;
this.minValue = newMinValue;
this.maxValue = newMaxValue;
// Create an array to hold the segments (size = 3 was chosen arbitrarily)
this.envelope = new ArrayList(3);
// Create one segment that spans all time containing the default values
MPEnvelopeSegment e = new MPEnvelopeSegment();
e.flags = MPFlags.BeginNeutralVal;
e.iCurve = MPCaps.Jump;
e.rtStart = 0;
e.rtEnd = MaxTime;
e.valStart = this.defaultValue;
e.valEnd = this.defaultValue;
this.envelope.Add(e);
}
/// <summary>
/// Creates the parameter connection for the gaze and mouse location
/// properties of the dmo filter.
/// </summary>
/// <param name="dmoWrapperFilter">
/// The <see cref="IBaseFilter"/> interface
/// of the dmo wrapper filter.
/// </param>
private void SetDMOParams(IBaseFilter dmoWrapperFilter)
{
if (dmoWrapperFilter == null)
{
return;
}
int hr;
this.dmoParams = dmoWrapperFilter as IMediaParams;
this.gazeX = new MPData();
this.gazeX.vInt = 0;
hr = this.dmoParams.SetParam(0, this.gazeX);
DMOError.ThrowExceptionForHR(hr);
this.gazeY = new MPData();
this.gazeY.vInt = 0;
hr = this.dmoParams.SetParam(1, this.gazeY);
DMOError.ThrowExceptionForHR(hr);
this.mouseX = new MPData();
this.mouseX.vInt = 0;
hr = this.dmoParams.SetParam(2, this.mouseX);
DMOError.ThrowExceptionForHR(hr);
this.mouseY = new MPData();
this.mouseY.vInt = 0;
hr = this.dmoParams.SetParam(3, this.mouseY);
DMOError.ThrowExceptionForHR(hr);
}
/// <summary>
/// Sets the parameters for the mixer DMO according to
/// the given <see cref="VideoExportProperties"/>
/// </summary>
/// <param name="dmoWrapperFilter">The <see cref="IBaseFilter"/>
/// that contains the DMO.</param>
/// <param name="exportProperties">The <see cref="VideoExportProperties"/>
/// to use.</param>
private void SetDMOParams(IBaseFilter dmoWrapperFilter, VideoExportProperties exportProperties)
{
int hr;
IMediaParams dmoParams = dmoWrapperFilter as IMediaParams;
MPData outputBackground = new MPData();
MPData streamTop = new MPData();
MPData streamLeft = new MPData();
MPData streamHeight = new MPData();
MPData streamWidth = new MPData();
MPData streamAlpha = new MPData();
// Get Background color
Color bkg = exportProperties.OutputVideoColor;
// Convert to integer value AARRGGBB
outputBackground.vInt = bkg.ToArgb();
// Set DMO param
hr = dmoParams.SetParam(0, outputBackground);
DMOError.ThrowExceptionForHR(hr);
streamLeft.vFloat = exportProperties.GazeVideoProperties.StreamPosition.Left;
hr = dmoParams.SetParam(1, streamLeft);
DMOError.ThrowExceptionForHR(hr);
streamTop.vFloat = exportProperties.GazeVideoProperties.StreamPosition.Top;
hr = dmoParams.SetParam(2, streamTop);
DMOError.ThrowExceptionForHR(hr);
streamWidth.vFloat = exportProperties.GazeVideoProperties.StreamPosition.Width;
hr = dmoParams.SetParam(3, streamWidth);
DMOError.ThrowExceptionForHR(hr);
streamHeight.vFloat = exportProperties.GazeVideoProperties.StreamPosition.Height;
hr = dmoParams.SetParam(4, streamHeight);
DMOError.ThrowExceptionForHR(hr);
streamAlpha.vFloat = exportProperties.GazeVideoProperties.StreamAlpha;
hr = dmoParams.SetParam(5, streamAlpha);
DMOError.ThrowExceptionForHR(hr);
streamLeft.vFloat = exportProperties.UserVideoProperties.StreamPosition.Left;
hr = dmoParams.SetParam(6, streamLeft);
DMOError.ThrowExceptionForHR(hr);
streamTop.vFloat = exportProperties.UserVideoProperties.StreamPosition.Top;
hr = dmoParams.SetParam(7, streamTop);
DMOError.ThrowExceptionForHR(hr);
streamWidth.vFloat = exportProperties.UserVideoProperties.StreamPosition.Width;
hr = dmoParams.SetParam(8, streamWidth);
DMOError.ThrowExceptionForHR(hr);
streamHeight.vFloat = exportProperties.UserVideoProperties.StreamPosition.Height;
hr = dmoParams.SetParam(9, streamHeight);
DMOError.ThrowExceptionForHR(hr);
streamAlpha.vFloat = exportProperties.UserVideoProperties.StreamAlpha;
hr = dmoParams.SetParam(10, streamAlpha);
DMOError.ThrowExceptionForHR(hr);
}
/// <summary>
/// COM entry point for IMediaParams.GetParam
/// </summary>
/// <param name="paramIndex">[in] Zero-based index of the parameter,
/// or DWORD_ALLPARAMS to apply the value to every parameter.</param>
/// <param name="dataValue">[out] Pointer to a variable of type
/// MPData that receives the parameter value.</param>
/// <returns>Returns an HRESULT value.</returns>
/// <remarks>
/// There should be no need to modify or override this method. See
/// <see cref="IMediaObjectImpl.ParamDefine"/> and <see cref="IMediaObjectImpl.ParamCalcValueForTime"/>
/// for details about how this works.
/// </remarks>
public int GetParam(int paramIndex, out MPData dataValue)
{
int hr;
try
{
lock (this)
{
// If the requested parameter is within range
if (paramIndex < this.paramsClass.Parms.Length && paramIndex >= 0)
{
// Read the value
dataValue = this.paramsClass.Envelopes[paramIndex].CalcValueForTime(this.InternalGetCurrentTime());
hr = SOK;
}
else
{
dataValue = new MPData();
hr = EINVALIDARG;
}
}
}
catch (Exception e)
{
// Generic handling of all exceptions. While .NET will turn exceptions into
// HRESULTS "automatically", I prefer to have some place I can set a breakpoint.
hr = this.CatFail(e);
// Have to have this to make the compiler happy.
dataValue = new MPData();
}
return hr;
}
