capGetAudioFormat macro

The capGetAudioFormat macro obtains the audio format. You can use this macro or explicitly call the WM_CAP_GET_AUDIOFORMAT message.

Syntax


DWORD capGetAudioFormat(
    hwnd,
    psAudioFormat,
    wSize
);

Parameters

hwnd

Handle to a capture window.

psAudioFormat

Pointer to a WAVEFORMATEX structure, or NULL. If the value is NULL, the size, in bytes, required to hold the WAVEFORMATEX structure is returned.

wSize

Size, in bytes, of the structure referenced by s.

Return value

Returns the size, in bytes, of the audio format.

Remarks

Because compressed audio formats vary in size requirements applications must first retrieve the size, then allocate memory, and finally request the audio format data.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Vfw.h

See also

Video Capture
Video Capture Macros

 

 

Show: