IVPBaseConfig::GetVideoFormats method (vpconfig.h)

Articolo
4/26/2023

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The GetVideoFormats method retrieves the video formats the driver supports.

Syntax

HRESULT GetVideoFormats(
  [in, out] LPDWORD         pdwNumFormats,
  [in, out] LPDDPIXELFORMAT pddPixelFormats
);

Parameters

[in, out] pdwNumFormats

Pointer to a variable that specifies the number of DDPIXELFORMAT structures in the pddPixelFormats array. On input, specifies the size of the array (in number of array elements). On output, contains the actual number of DDPIXELFORMAT structures that were copied into the array. If pddPixelFormat is NULL, the method returns the required array size.

[in, out] pddPixelFormats

Pointer to an array of DDPIXELFORMAT structures, allocated by the caller. The device fills in the array with the format information.

Return value

Returns S_OK if successful, or an error code otherwise.

Remarks

The client first calls this method with the value NULL for the pddPixelFormats parameter. The device returns the number of DDPIXELFORMAT structures in the pddPixelFormatso parameter. The client allocates an array of that size, and calls the method again, passing the address of the array in the pddPixelFormats parameter. The device copies the format information into the buffer, and returns the actual number of copied structures in the pddPixelFormats parameter.

The DDPIXELFORMAT structure is documented in the Windows DDK.

The client sets the format by calling the IVPBaseConfig::SetVideoFormat method with an index number, which references one of the format structures returned by this method.

Include Dvp.h and Vptype.h before Vpconfig.h.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	vpconfig.h

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