Blackmagic Design Studio Camera 4K Plus Manual De Instalación Y Funcionamiento página 394

Data types 6 through 127 are reserved.
128: signed 5.11 fixed point
Data types 129 through 255 are available for device specific purposes.
Operation type (uint8)
0: assign value
1: offset / toggle value
Operation types 2 through 127 are reserved.
Operation types 128 through 255 are available for device specific purposes.
Data (void)
The category, parameter, data type and operation type partition a 24 bit operation space.
Group ID Parameter
0.0 Focus
0.1 Instantaneous autofocus
0.2 Aperture (f-stop)
0.3 Aperture (normalised)
0.4 Aperture (ordinal)
Instantaneous auto
0.5
Lens
aperture
0.6 Optical image stabilisation
0.7 Set absolute zoom (mm)
Set absolute zoom
0.8
(normalised)
Set continuous zoom
0.9
(speed)
Data elements are signed 16 bit integers representing a real number with
5 bits for the integer component and 11 bits for the fractional component.
The fixed point representation is equal to the real value multiplied by 2^11.
The representable range is from -16.0 to 15.9995 (15 + 2047/2048).
The operation type specifies what action to perform on the specified
parameter. Currently defined values are:
The supplied values are assigned to the specified parameter. Each element
will be clamped according to its valid range. A void parameter may only be
'assigned' an empty list of boolean type. This operation will trigger the action
associated with that parameter. A boolean value may be assigned the value
zero for false, and any other value for true.
Each value specifies signed offsets of the same type to be added to the
current parameter values. The resulting parameter value will be clamped
according to their valid range. It is not valid to apply an offset to a void value.
Applying any offset other than zero to a boolean value will invert that value.
The data field is 0 or more bytes as determined by the data type and number
of elements.
Type Index
fixed16 –
void –
fixed16 –
fixed16 –
int16 –
void –
boolean –
int16 –
fixed16 –
fixed16 –
Minimum Maximum
0.0 1.0
– –
-1.0 16.0
0.0 1.0
0 n
– –
– –
0 max
0.0 1.0
-1.0 +1.0
Developer Information
Interpretation
0.0 = near, 1.0 = far
trigger instantaneous autofocus
Aperture Value (where fnumber
= sqrt(2^AV))
0.0 = smallest, 1.0 = largest
Steps through available
aperture values from minimum
(0) to maximum (n)
trigger instantaneous auto
aperture
true = enabled, false = disabled
Move to specified focal length
in mm, from minimum (0) to
maximum (max)
Move to specified focal length:
0.0 = wide, 1.0 = tele
Start/stop zooming at specified
rate: -1.0 = zoom wider fast, 0.0
= stop,
+1 = zoom tele fast
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