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MCI_UNFREEZE
The MCI_UNFREEZE command restores motion to an area of the video buffer frozen with the MCI_FREEZE command. Digital-video, VCR, and video-overlay devices recognize this
command.
MCIERROR mciSendCommand(MCIDEVICEID wDeviceID, MCI_UNFREEZE,
DWORD dwFlags, (DWORD) (LPMCI_GENERIC_PARMS) lpUnfreeze);
Parameters
wDeviceID
Device identifier of the MCI device that is to receive the command message.
dwFlags
MCI_NOTIFY, MCI_WAIT, or, for digital-video and VCR devices, MCI_TEST. For
information about these flags, see The Wait, Notify, and Test Flags.
lpUnfreeze
Address of an MCI_GENERIC_PARMS structure. (Devices with extended command sets might replace this structure
with a device-specific structure.)
Return Values
Returns zero if successful or an error otherwise.
Remarks
The following additional flag is used with the digitalvideo device type:
MCI_DGV_RECT
The rc member of the structure identified by lpUnfreeze contains a valid display rectangle. The rectangle specifies a region within
the frame buffer whose pixels should have their lock mask bit turned off.
Rectangular regions are specified as described for the MCI_PUT command. If omitted, the rectangle defaults to the entire frame buffer. By
using a sequence of freeze and unfreeze commands with different rectangles,
arbitrary patterns of lock mask bits can be described.
For digital-video devices, the lpUnfreeze parameter points to an MCI_DGV_UNFREEZE_PARMS structure. For more information, see the comments for the MCI_DGV_RECT_PARMS structure.
The following additional flags are used with the vcr device type:
MCI_VCR_UNFREEZE_INPUT
Unfreeze the input.
MCI_VCR_UNFREEZE_OUTPUT
Unfreeze the output.
The following additional flag is used with the overlay device type:
MCI_OVLY_RECT
The rc member of the structure identified by lpUnfreeze contains a valid display rectangle. This is a required parameter.
For video-overlay devices, the lpUnfreeze parameter points to an MCI_OVLY_RECT_PARMS structure.
See Also
MCI_DGV_RECT_PARMS, MCI_FREEZE, MCI_GENERIC_PARMS, MCI_OVLY_RECT_PARMS, MCI_PUT
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