[pwimmer]

I propose a different IMediaSampleEx interface that derives from IMediaSample and adds just two methods:

HRESULT GetPointerEx(BYTE **ppBuffer, int iView);
long GetSizeEx(int iView);

This allows to use separate buffers for each view, which I would prefer over a single buffer for all views.

The format type adds a dwNumViews field to the VIDEOINFOHEADER2

DEFINE_GUID(STEREOLAYOUT_MONOSCOPIC, ...); // Monoscopic
DEFINE_GUID(STEREOLAYOUT_MULTIBUFFERS, ...); // Use StereoMediaSampleEx to get buffers != 0
DEFINE_GUID(STEREOLAYOUT_SIDEBYSIDELEFTFIRST, ...);
DEFINE_GUID(STEREOLAYOUT_SIDEBYSIDERIGHTFIRST, ...);
DEFINE_GUID(STEREOLAYOUT_OVERUNDERLEFTTOP, ...);
DEFINE_GUID(STEREOLAYOUT_OVERUNDERRIGHTTOP, ...);
DEFINE_GUID(STEREOLAYOUT_INTERLACEDLEFTFIRST, ...);
DEFINE_GUID(STEREOLAYOUT_INTERLACEDRIGHTFIRST, ...);
DEFINE_GUID(STEREOLAYOUT_FRAMESQUENTIALLEFTFIRST, ...);
DEFINE_GUID(STEREOLAYOUT_FRAMESQUENTIALRIGHTFIRST, ...);


typedef struct tagSTEREOVIDEOINFOHEADER {
RECT rcSource;
RECT rcTarget;
DWORD dwBitRate;
DWORD dwBitErrorRate;
REFERENCE_TIME AvgTimePerFrame;
DWORD dwInterlaceFlags;
DWORD dwCopyProtectFlags;
DWORD dwPictAspectRatioX;
DWORD dwPictAspectRatioY;
DWORD dwControlFlags;
DWORD dwReserved2;

// Stereo related fields
GUID guidStereoLayout; // See supported STEREOLAYOUT_xxx GUIDs above
DWORD dwNumViews; // Number of views (only valid for STEREOLAYOUT_MULTIBUFFERS)

BITMAPINFOHEADER bmiHeader;
} STEREOVIDEOINFOHEADER;