Allow disabling and enabling IR emitter from application code.

[arjun810]

This allows application users to enable and disable the emitter. This is useful when in a multiple-sensor environment, where you want to synchronize the IR emitters to avoid interference. Starting and stopping the depth stream can take up to a second, whereas using setEmitterState takes .005-.25 seconds.

The one questionable thing this contains is making SetEmitterState public rather than private, but other than that, I tried to follow the same style as used by setting the mirroring state.

[mbrubake]

Is this likely to be merged soon? This functionality would be very useful for me.

[eddiecohen]

The functionality already exists, as an extended API. Just use:

include

device.setProperty(XN_MODULE_PROPERTY_EMITTER_STATE, TRUE/FALSE);