This version of this document is no longer maintained. For the latest documentation, see http://www.qnx.com/developers/docs.

gf_vcap_update()

Update video capture unit parameters

Synopsis:

#include <gf/gf.h>

int gf_vcap_update (
        gf_vcap_t       vcap,
        unsigned        flags );

Arguments:

vcap

The handle of the video capture unit, returned by gf_vcap_attach().

flags

Flags controlling additional behavior. Valid flags are:

GF_VCAP_UPDATE_NO_WAIT_VSYNC

Perform the operation asynchronously; the default behavior is to wait until the current frame has finished being captured before performing the update.

Library:

gf

Description:

This function updates a video capture unit's parameters. Changes made to a capture unit via the gf_vcap_set_*() set of functions are enqueued and do not take effect until you explicitly call this function.

Returns:

The status of the operation:

GF_ERR_OK

Success

GF_ERR_IODISPLAY

Error communicating with io-display. Check to ensure io-display is still running. The sloginfo utility may provide more information.

Classification:

QNX Graphics Framework

See also:

gf_vcap_attach()