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1
st
"Parameter" text (always the same)
2
nd
Name of the parameter
3
rd
Parameter type
4
th
Parameter description
5
th
undefined
6
th
Default value
7
th
Minimum value (only for numbers)
8
th
Maximum value (only for numbers)
Table 11 -
Fields in parameter descriptions
Looking at the above, you can see that there are 7 controls, although you might be interested in only some
of them. The most interesting ones in the layer source are the
info
,
selection
and
control
controls.
They all have parameters that define what you are currently playing back.
Parameter description contains at least 6 fields separated by ’:’ that are defined in table 7
You can also use command
ctrl_status
object
to see an object’s curren
t parameter values. Both
ctrl_status
and
ctrl_info
commands send their output normally as human readable text, but also
as a message that is easier to parse by computers.
D.d.
Parameter descriptions
Because most of the parameters are trivially understood and you can query them using the ctrl_info
command, only the nontrivial parameters are described here.
D.d.a.
Media Mode
Media mode parameter in Source / control describes whether the media is paused, stopped or playing. There
are multiple play modes because we need to know what to do when the media is played to the end: should
we loop, stop or continue to next clip.
-1 Error condition
0
Default (play loop)
1
Play next
2
Play stop
3
Play pause
4
Play loop
5
Pause
6
Stop
Table 12 -
Media modes
Media modes. We have multiple play modes where the last word tells us what happens when the media is
played to the end: should it loop, stop or continue to next clip
