capSetCallbackOnWaveStream macro (vfw.h)

The capSetCallbackOnWaveStream macro sets a callback function in the application. AVICap calls this procedure during streaming capture when a new audio buffer becomes available. You can use this macro or explicitly call the WM_CAP_SET_CALLBACK_WAVESTREAM message.

Syntax

void capSetCallbackOnWaveStream(
   hwnd,
   fpProc
);

Parameters

hwnd

Handle to a capture window.

fpProc

Pointer to the wave stream callback function, of type capWaveStreamCallback. Specify NULL for this parameter to disable a previously installed wave stream callback function.

Return value

None

Remarks

The capture window calls the procedure before writing the audio buffer to disk. This allows applications to modify the audio buffer if desired.

If a wave stream callback function is used, it must be installed before starting the capture session and it must remain enabled for the duration of the session. It can be disabled after streaming capture ends.

Requirements

See also

Video Capture

Video Capture Macros