@@ -306,6 +306,46 @@ controls:
maximum valid value is given by the properties::ScalerCropMaximum
property, and the two can be used to implement digital zoom.
+ - FrameDurations:
+ type: int64_t
+ description: |
+ The minimum and maximum (in that order) frame duration,
+ expressed in micro-seconds.
+
+ When provided by applications, the control specifies the sensor frame
+ duration interval the pipeline has to use. This could also limit the
+ largest exposure time the sensor can use. For example, if a maximum
+ frame duration of 33ms is requested (corresponding to 30 frames per
+ second), the sensor will not be able to raise the exposure time above
+ 33ms. A fixed frame duration is achieved by setting the minimum and
+ maximum values to be the same.
+
+ The maximum frame duration provides the absolute limit to the shutter
+ speed computed by the AE algorithm and it overrides any exposure mode
+ setting specified with controls::AeExposureMode. Similarly, when a
+ manual exposure time is set through controls::ExposureTime, it also
+ gets clipped to the limits set by this control.
+
+ \sa AeExposureMode
+ \sa ExposureTime
+
+ \todo Refer to the frame duration limits property to describe how
+ application-provided values gets clipped and reset.
+
+ When reported by pipelines, the control expresses the duration of the
+ sensor frame used to produce streams part of the completed Request.
+ The minimum and maximum values shall then be the same, as the sensor
+ frame duration is a fixed parameter. The sensor frame duration is one
+ of the parameter that defines the capture frame rate but it does not
+ alone provide enough information to fully calculate it as it does not
+ account for pipeline processing delays.
+
+ \todo Define how to calculate the capture frame rate by
+ defining controls to report additional delays introduced by
+ the capture pipeline or post-processing stages (ie JPEG
+ conversion, frame scaling).
+ size: [2]
+
# ----------------------------------------------------------------------------
# Draft controls section