Callback - ADLINK Technology HDV62A Library Reference Manual

2.5.4

Callback

Sets or retreives callback handle. While event and callback
are the most frequently used methods determining when to
recover frame or audio information, only one is normally
allowed, but here both can be set.
Syntax
C/C++
int
HDV62CALLBACK Fun)
C#
int
Fun)
VB.Net
SetCallback (ByVal Number as UInteger, ByVal
Fun as HDV62CALLBACK) As Integer
Parameter(s)
Number
The number of the device, with allowed values from 0 to 15.
Fun
Pointer for callback routine, in which a callback function
must be declared and set as the parameter. In the callback
function, call:
GetImageStream to acquire the pointer of the frame
buffer
GetAudioStream to acquire audi data pointer and
size
Return Value
No error occurs if return value ≥ 0; if a negative value, please
refer to Other Functions for return code error information.
50
Hdv62_SetCallback
SetCallback (uint
(UINT
Number, HDV62CALLBACK
Function Library
Number,