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MCI_FREEZE
The MCI_FREEZE command freezes motion on the display. Digital-video, video-overlay, and VCR
devices recognize this command.
MCIERROR mciSendCommand(MCIDEVICEID wDeviceID, MCI_FREEZE,
DWORD dwFlags, (DWORD) (LPMCI_GENERIC_PARMS) lpFreeze);
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.
lpFreeze
Address of an MCI_GENERIC_PARMS structure. (Devices with additional parameters might replace this structure
with a device-specific structure.)
Return Values
Returns zero if successful or an error otherwise.
Remarks
The following additional flags are used by the digitalvideo device type:
MCI_DGV_FREEZE_AT
The rc member of the structure identified by lpFreeze contains a valid rectangle. The rectangle specifies a region within the frame
buffer that will have the lock mask bit for each pixel turned on. The
specified pixels will not be updated until their lock mask bit is turned off. If this
flag is not specified, the rectangle defaults to the entire frame buffer. This
flag is supported only if the MCI_GETDEVCAPS command returns TRUE for the MCI_DGV_GETDEVCAPS_CAN_LOCK flag.
MCI_DGV_FREEZE_OUTSIDE
The area outside the region specified for the MCI_DGV_FREEZE_AT flag is frozen.
For digital-video devices, the lpFreeze parameter points to an MCI_DGV_FREEZE_PARMS structure.
The following additional flags are used by the vcr device type:
MCI_VCR_FREEZE_FIELD
Freeze only one member of the current frame.
MCI_VCR_FREEZE_FRAME
Freeze both fields of the current frame.
MCI_VCR_FREEZE_INPUT
Freeze the current frame on the screen (used for recording).
MCI_VCR_FREEZE_OUTPUT
Freeze the current frame from the VCR (used with frame capture).
For VCR devices, the lpFreeze parameter points to an MCI_GENERIC_PARMS structure.
The following additional flag is used by the overlay device type:
MCI_OVLY_RECT
The rc member of the structure identified by lpFreeze contains a valid rectangle. If this flag is not specified, the device driver
will freeze the entire frame.
For video-overlay devices, the lpFreeze parameter points to an MCI_OVLY_RECT_PARMS structure.
See Also
MCI_DGV_FREEZE_PARMS, MCI_GENERIC_PARMS, MCI_GETDEVCAPS
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