Matrox Morphis QxT, Installation And Hardware Reference

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Acquisition section 35
The following diagram illustrates the video capture controller found on Matrox
Morphis QxT.
The video capture controller contains 16 capture controllers.
Capture controllers
Each capture controller performs the following:
• Each sets the conditions under which to start and end a grab. Examples of grabbing
conditions are whether to grab one or two fields per frame, or whether to start the
grab on an odd or even field. Set the capture controller conditions using the
MIL-Lite
MdigControl() function.
• Each can generate interrupts, based on various grabbing events. You can hook a
function to these events using the MIL-Lite MdigHookFunction() function. The
various events that can cause an interrupt are listed in the following table:
Hook Type Description
M_GRAB_START Hook to the start of each grab.
M_GRAB_END Hook to the end of each grab.
M_GRAB_FIELD_END_ODD Hook to the end of grabbed odd fields.
M_GRAB_FIELD_END_EVEN Hook to the end of grabbed even fields.
Video capture controller
Acquisition memory
(128 MB)
Capture
Controller
From Decoder 15
Capture
Controller
From Decoder 0