[Linphone-developers] To using usb capture device with analog video composite

[Fumitaka Yasukawa]

hi, everyone

I need your helps to resolve this problem.

I want to do that linphone on windows supports usb capture device with
analog video composite as new feature.
So I am trying to add IAMCrossbar interface to route analog device.
However linphone hung up at get_PinCounts() that I added.

My environment:
 MinGW version      : 0.4-alpha-1 (mingw-get-inst-20111118.exe)
 Linphone version   : 3.5.2 (tar archive)
 linphone-deps-win32: linphone-deps-win32-120218.zip


Describe added source: msdscap-mingw.cc

//
// 1. IID and define Interface
//
DEFINE_GUID( IID_IAMCrossbar, 0xc6e13380, 0x30ac, 0x11d0,
    0xa1, 0x8c, 0x00, 0xa0, 0xc9, 0x11, 0x89, 0x56);

#define INTERFACE IAMCrossbar
DECLARE_INTERFACE_(IAMCrossbar, IUnknown)
{
    STDMETHOD(QueryInterface) (THIS_ REFIID, PVOID*) PURE;
    STDMETHOD_(ULONG, AddRef) (THIS);
    STDMETHOD_(ULONG, Release) (THIS);
    STDMETHOD(get_PinCounts) (THIS_ long *, long *);
    STDMETHOD(CanRoute) (THIS_ long, long);
    STDMETHOD(Route) (THIS_ long, long);
    STDMETHOD(get_IsRoutedTo) (THIS_ long, long *);
    STDMETHOD(get_CrossbarPinInfo) (THIS_ BOOL, long, long *, long *);
};
#undef INTERFACE

//
// 2. add follwing lines after selectBestFormat() in
DSCapture::createDshowGraph()
//

    ComPtr< IAMCrossbar > pCrossbar;
    PIN_INFO pinInfo;
    sourceOut->QueryPinInfo(&pinInfo);
    pinInfo.pFilter->QueryInterface(IID_IAMCrossbar, (void **)&pCrossbar);
    LONG inputPinCount, outputPinCount;
    pCrossbar->get_PinCounts(&outputPinCount, &inputPinCount);


Condition:
Compiling was successful.
But linphone hung up at aboving function:get_PinCounts(), when running it.
I have some question to figure it out.

Q1. Is aboving added codes right?
    or need codes more?

Q2. Do I need anythingelse like configuration of mingw and directx?


Best regards

Fumitaka.Yasukawa
Japan