Hi all,
I'm working on a 3G Video Call feature atm and I'm a bit stuck with one feature
implementation. Use case is:
1) User in settings peeks up an image from gallery or from camera as a
placeholder image for case when during the video call user turns off a camera.
2) User starts/receives a video call.
3) User turns off a camera.
In that case we should start sending peeked placeholder image to an opponent
instead of a camera stream. So, my questions are:
1) What is the right way to get a setting that is set in settings application
like this:
activity.onsuccess = function onPickSuccess() {
var blob = activity.result.blob;
if (!blob) {
return;
}
navigator.mozSettings.createLock().set({
'videoCall.image': blob
});
};
Right now I'm using this:
.....................
nsCOMPtr<nsISettingsService> settings =
do_GetService("@mozilla.org/settingsService;1");
nsCOMPtr<nsISettingsServiceLock> settingsLock;
nsresult rv = settings->CreateLock(nullptr, getter_AddRefs(settingsLock));
//handling error if rv is not NS_OK
nsRefPtr<SettingsGetter> task = new SettingsGetter(this);
rv = settingsLock->Get(VIDEO_CALL_PLACEHOLDER_IMAGE_PROPERTY_NAME, task);
//handling error if rv is not NS_OK
.....................
and I'm getting a JSObject in this nsISettingsServiceCallback::Handle callback:
// nsISettingsServiceCallback implementation
NS_IMETHOD Handle(const nsAString& aName, JS::Handle<JS::Value> aResult)
{
// here aResult is an object (isObject() returns true).
}
So, I can't understand how to get something out of this aResult that I can use
to get a decoded image buffer that might be used to be encoded and placed in an
outgoing video stream that we send.
2) Second question is 'what is the right/best/fastest way to decode an image'?
Ideally it would be nice to get a GrallocImage with this image.
I suppose that I should use mozilla::image::ImageFactory class to decode it,
right?
Thanks in advance for any help,
Kind Regards,
Sergey
SERGEY KASHIN
Principal SW engineer
Symphony Teleca
24 Salganskaya St., Nizhny Novgorod, 603105, Russia
Phone: +78312577232;ext=325
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