/// <summary>
/// QueryConnect checks if two Pins can be connected.
/// </summary>
/// <param name="pin">Pin 1</param>
/// <param name="other">Pin 2</param>
/// <returns>True if they accept connection</returns>
static bool QueryConnect(IPin pin, IPin other)
{
IEnumMediaTypes enumTypes;
int hr = pin.EnumMediaTypes(out enumTypes);
if (hr != 0 || enumTypes == null)
{
return(false);
}
int count = 0;
IntPtr ptrFetched = Marshal.AllocCoTaskMem(4);
try
{
for (; ;)
{
AMMediaType[] types = new AMMediaType[1];
hr = enumTypes.Next(1, types, ptrFetched);
if (hr != 0 || Marshal.ReadInt32(ptrFetched) == 0)
{
break;
}
count++;
try
{
if (other.QueryAccept(types[0]) == 0)
{
return(true);
}
}
finally
{
FilterGraphTools.FreeAMMediaType(types[0]);
}
}
PinInfo info;
PinInfo infoOther;
pin.QueryPinInfo(out info);
other.QueryPinInfo(out infoOther);
ServiceRegistration.Get <ILogger>().Info("Pins {0} and {1} do not accept each other. Tested {2} media types", info.name, infoOther.name, count);
FilterGraphTools.FreePinInfo(info);
FilterGraphTools.FreePinInfo(infoOther);
return(false);
}
finally
{
Marshal.FreeCoTaskMem(ptrFetched);
}
}
private static bool TestMediaTypes(IPin pin, IPin receiver)
{
bool ret = false;
IEnumMediaTypes types;
pin.EnumMediaTypes(out types);
types.Reset();
while (true)
{
AMMediaType[] mediaTypes = new AMMediaType[1];
int typesFetched;
int hr = types.Next(1, mediaTypes, out typesFetched);
if (hr != 0 || typesFetched == 0)
{
break;
}
//Log.Info("Check output type: {0}, {1}", mediaTypes[0].majorType,
// mediaTypes[0].subType);
if (receiver.QueryAccept(mediaTypes[0]) == 0)
{
//Log.Info("Accepted!");
ret = true;
break;
}
}
ReleaseComObject(types);
//Log.Info("-----EndofTypes");
return ret;
}
public static bool QueryConnect(IPin pin, IPin other)
{
IEnumMediaTypes enumTypes;
int hr = pin.EnumMediaTypes(out enumTypes);
if (hr != 0 || enumTypes == null)
{
return false;
}
int count = 0;
for (;;)
{
AMMediaType[] types = new AMMediaType[1];
int fetched;
hr = enumTypes.Next(1, types, out fetched);
if (hr != 0 || fetched == 0)
{
break;
}
count++;
if (other.QueryAccept(types[0]) == 0)
{
return true;
}
}
PinInfo info;
PinInfo infoOther;
pin.QueryPinInfo(out info);
DsUtils.FreePinInfo(info);
other.QueryPinInfo(out infoOther);
DsUtils.FreePinInfo(infoOther);
Log.Info("Pins {0} and {1} do not accept each other. Tested {2} media types", info.name, infoOther.name, count);
return false;
}
/// <summary>
/// QueryConnect checks if two Pins can be connected.
/// </summary>
/// <param name="pin">Pin 1</param>
/// <param name="other">Pin 2</param>
/// <returns>True if they accept connection</returns>
static bool QueryConnect(IPin pin, IPin other)
{
IEnumMediaTypes enumTypes;
int hr = pin.EnumMediaTypes(out enumTypes);
if (hr != 0 || enumTypes == null)
return false;
int count = 0;
IntPtr ptrFetched = Marshal.AllocCoTaskMem(4);
try
{
for (; ; )
{
AMMediaType[] types = new AMMediaType[1];
hr = enumTypes.Next(1, types, ptrFetched);
if (hr != 0 || Marshal.ReadInt32(ptrFetched) == 0)
break;
count++;
try
{
if (other.QueryAccept(types[0]) == 0)
return true;
}
finally
{
FilterGraphTools.FreeAMMediaType(types[0]);
}
}
PinInfo info;
PinInfo infoOther;
pin.QueryPinInfo(out info);
other.QueryPinInfo(out infoOther);
ServiceRegistration.Get<ILogger>().Info("Pins {0} and {1} do not accept each other. Tested {2} media types", info.name, infoOther.name, count);
FilterGraphTools.FreePinInfo(info);
FilterGraphTools.FreePinInfo(infoOther);
return false;
}
finally
{
Marshal.FreeCoTaskMem(ptrFetched);
}
}
public int Connect(IPin pReceivePin, AMMediaType pmt)
{
Monitor.Enter(this);
int hr = S_OK;
pin = null;
pintype = null;
allocator = null;
string id = "Unnamed pin";
pReceivePin.QueryId(out id);
PinInfo pi = new PinInfo();
hr = pReceivePin.QueryPinInfo(out pi);
if (hr == S_OK)
{
FilterInfo fi = new FilterInfo();
hr = pi.filter.QueryFilterInfo(out fi);
if (hr == S_OK)
{
id += (" (" + fi.achName);
}
Guid guid;
hr = pi.filter.GetClassID(out guid);
if (hr == S_OK)
{
id += (", " + guid.ToString());
}
id += ")";
}
try
{
AMMediaType amt = null;
if (pmt != null)
{
amt = pmt;
}
else
#if false
{
IEnumMediaTypes ie;
hr = pReceivePin.EnumMediaTypes(out ie);
int fetched;
int alloc = Marshal.SizeOf(typeof(AMMediaType));
IntPtr mtypePtr = Marshal.AllocCoTaskMem(alloc);
while (ie.Next(1, mtypePtr, out fetched) == S_OK)
{
amt = new AMMediaType();
Marshal.PtrToStructure(mtypePtr, amt);
hr = pReceivePin.QueryAccept(amt);
if (hr == S_OK)
{
break;
}
DsUtils.FreeAMMediaType(amt);
amt = null;
}
if (fetched == 0)
{
amt = null;
}
Marshal.FreeCoTaskMem(mtypePtr);
}
if (amt == null)
#endif
{
amt = mediatype;
}
hr = pReceivePin.QueryAccept(amt);
if (hr == S_FALSE)
{
log.InfoFormat("No media type for pin '{0}'", id);
Monitor.Exit(this);
return VFW_E_NO_ACCEPTABLE_TYPES;
}
hr = pReceivePin.ReceiveConnection(this, amt);
if (hr == VFW_E_TYPE_NOT_ACCEPTED)
{
log.InfoFormat("No connection to pin '{0}'", id);
Monitor.Exit(this);
return VFW_E_NO_ACCEPTABLE_TYPES;
}
DsError.ThrowExceptionForHR(hr);
pin = pReceivePin;
pintype = amt;
}
catch (Exception e)
{
LogUtil.ExceptionLog.ErrorFormat("Caught exception in connect ({0}): {1}{2}", id, e.Message, e.StackTrace);
pin = null;
pintype = null;
allocator = null;
Monitor.Exit(this);
return VFW_E_NO_TRANSPORT;
}
Monitor.Exit(this);
log.InfoFormat("Connected to pin '{0}'", id);
return S_OK;
}
public int Connect(IPin pReceivePin, AMMediaType pmt)
{
unchecked
{
if (_ConnectedPin != null)
{
return((int)HRESULT.VFW_E_ALREADY_CONNECTED);
}
PinDirection pd;
pReceivePin.QueryDirection(out pd);
if (pd == _Direction)
{
return((int)HRESULT.VFW_E_INVALID_DIRECTION);
}
PinInfo pi;
pReceivePin.QueryPinInfo(out pi);
FilterInfo fi;
pi.filter.QueryFilterInfo(out fi);
Debug.WriteLine(fi.achName + "." + pi.name, _Name + " connect attempt from");
if (pi.name == "Subpicture Input")
{
}
HRESULT hr = HRESULT.VFW_E_NO_ACCEPTABLE_TYPES;
//
// Try match our media types with the specific one requested
// if any...
//
if (null != (pmt))
{
for (int i = 0; i < MediaTypes.Count; i++)
{
if (MatchesPartial(MediaTypes[i], pmt))
{
hr = OnReceiveConnection(pReceivePin, MediaTypes[i]);
if (hr != HRESULT.S_OK)
{
// pReceivePin.Disconnect();
}
else
{
break;
}
}
}
}
//
// Otherwise try force-connect all of the ones we like.
//
if (hr != HRESULT.S_OK)
{
for (int i = 0; i < MediaTypes.Count; i++)
{
AMMediaType newMT = new AMMediaType();
Copy(MediaTypes[i], newMT);
hr = (HRESULT)pReceivePin.QueryAccept(newMT);
if (hr == HRESULT.S_OK)
{
hr = OnReceiveConnection(pReceivePin, newMT);
if (hr != HRESULT.S_OK)
{
//pReceivePin.Disconnect();
}
else
{
break;
}
}
}
}
//
// Failing that, try connect with any of their numerous
// supported types..
//
if (hr != HRESULT.S_OK)
{
IEnumMediaTypes en;
pReceivePin.EnumMediaTypes(out en);
en.Reset();
/*
* Unsafe pointer edition
* ======================
* I was experminting AMMediaType as a value struct type
* for better marshalling.
*
* AMMediaType* types = null;
* int fetched = 0;
* do
* {
* HRESULT r = en.Next(1, (AMMediaType**)&types, out fetched);
* if (r != HRESULT.S_OK
|| fetched == 0)
|| break;
|| AMMediaType tmp = *types;
|| for (int x = 0; x < MediaTypes.Count; x++)
|| {
|| if ((MediaTypes[x].majorType == tmp.majorType
|| && MediaTypes[x].subType == tmp.subType)
|| AcceptsAnyMedia)
|| {
|| hr = OnReceiveConnection(pReceivePin, tmp); //MediaTypes[x]
||
|| if (hr != HRESULT.S_OK)
|| {
|| pReceivePin.Disconnect();
|| }
|| else
|| break;
|| }
|| }
|| AMMediaType.Free(tmp);
||} while (fetched > 0);*/
AMMediaType[] types = new AMMediaType[100];
IntPtr ptr = ToPtr(types);
IntPtr fetched = IntPtr.Zero;
en.Next(10, types, fetched);
types = FromIntPtr(ptr, fetched.ToInt32());
if (fetched.ToInt32() > 0 &&
types != null)
{
for (int x = 0; x < MediaTypes.Count; x++)
{
for (int i = 0; i < fetched.ToInt32(); i++)
{
if ((MediaTypes[x].majorType == types[i].majorType &&
MediaTypes[x].subType == types[i].subType) ||
AcceptsAnyMedia)
{
hr = OnReceiveConnection(pReceivePin, types[i]);
if (hr != HRESULT.S_OK)
{
//pReceivePin.Disconnect();
}
else
{
break;
}
}
}
if (hr == HRESULT.S_OK)
{
break;
}
}
}
for (int i = 0; i < fetched.ToInt32(); i++)
{
Free(types[i]);
}
if (Marshal.IsComObject(en))
{
Marshal.ReleaseComObject(en);
}
}
if (hr != HRESULT.S_OK)
{
// Final clean up
this.Disconnect();
if (Marshal.IsComObject(pReceivePin))
{
Marshal.ReleaseComObject(pReceivePin);
}
// Connect failed, but may have returned S_FALSE
// so this ensures a better return code.
hr = HRESULT.VFW_E_NO_ACCEPTABLE_TYPES;
}
if (hr == HRESULT.S_OK)
{
ResolveConnectedFilter();
}
return((int)hr);
}
}
