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Change-Id: I7becfab81d56fc45ec7dc76333383503b8abccfe
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
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According to the docs (CMMotionManager class reference) there are
two ways of interacting with the accelerometer; Either through the
callback API (NSOperationQueue), or peridic sampling (polling).
Our first implementation of IOSAcceleometer used the former
technique, which turns out to have bad performance when using the
sensor together with a fine-grained QTimer. And this case is
pretty common when using sensors together with e.g QML.
Reading through the docs more carefully, they recommend using the
polling technique when creating games instead since the
NSOperationQueue introduces some overhead. So this patch does
that, change the implementation to use QTimer based polling. And
this solves the performance issues found.
Change-Id: Ifde0d2292302467afb8db90a954ef45f3238350e
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>
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Since we process data from the sensors using a callback
queued to the application operation queue, we need to check
that the qt sensor is still alive before accessing it.
Change-Id: I697d72f94aedec34b125006d6405428e282bfc0d
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
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The code as it stood made use of an extra obj-c class
to listen for sensor readings. This is not needed with
the block (lambda) API used by CMMotionManager.
This will also make IOSGyroscope and (soon) IOSMagnetometer
follow the same code pattern.
Change-Id: If945f8616f4cdde98b31382fcd9c555c2b490c4a
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
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The accelerometer is always available, so no need to check for
this.
Change-Id: I79411ff023c4350c5b31d4fad048484db2b2fe43
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>
Reviewed-by: Lorn Potter <lorn.potter@jollamobile.com>
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Respect user data rate settings by applying the rate just
before the sensor starts
Change-Id: I3da37497c574cbf94d57699c941ce2bf3b54373c
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>
Reviewed-by: Lorn Potter <lorn.potter@jollamobile.com>
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Convert from NSTimeInterval to microseconds
Change-Id: I51fb3791aa72dcc7514c39820e4347a3c1d4039a
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>
Reviewed-by: Lorn Potter <lorn.potter@jollamobile.com>
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This change implements an accelerometer for iOS.
Change-Id: Id6de98427312bc0be42935fd9704117665d1e4a2
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>
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