Comments (3)
andimik
commented on August 17, 2024
I'm pretty sure, users who installed qt-dab or other tools know what channels and services they are able to receive and may own DAB radios as well.
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MkMunich
commented on August 17, 2024
Thanks for the quick response.
You're right ;-) but this was not my point. I'm sorry about my bad English. I'll try it again:
I do not understand, how dab_cmdline is finally playing radio on my Rpi 3. The "Callbacks" are strange to me: Do I need more applications to get a sound and dab+ information?
As dab_cmdline is coming with no GUI (this is exactly, I'm looking for) I would like to use dab_cmdline in RasPiCar, which is a Kodi (Python) application. With a car, there is a need to scan the radio stations more often than at home, because of driving around.
When using dab_cmdline with Python interface, RasPiCar would need a list of available radio stations. Having this list, it would then use dab_cmdline to tune the radio station. My question is, where this radio station list is coming from. I had in mind, that a scan was already present in qt_dab and so I suggested a new 'scan' command in dab_cmdline. But of course, the list can also be created by a separate tool ;-)
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JvanKatwijk
commented on August 17, 2024
The command line version does not scan. It is tuned to a given channel and
extract the data from that channel. If there is no data found within a
reasonable amount of time, the software will halt. If an ensemble is found,
the program names are displayed.
The Python interface is just to experiment a little with Python.
DAB handling software is made into a library, i.e. something that has to be
controlled from elsewhere.
The callbacks connect the library output to the command line handler, GUI
or whatever is used to control the library,
Both the C++ command line version and the Python version have
implementations for relevant callbacks, In the end a lot of
data is sent back from the library to the controlling software: obviously
sound samples, but also the program names in the ensemble,
the dynamic label (i.e. messages encoded in the sound), some signal and
data quality indicators et etc.
The scanning as implemented in Qt DAB searches for the next channel in the
selected band that contains DAB data, it does not search for all channels
and all stations.
If there is sufficient interest then I might look at a scanning function in
the cmd line version.
best
jan
2017-04-04 12:21 GMT+02:00 MkMunich <[email protected]>:
… Thanks for the quick response.
You're right ;-) but this was not my point. I'm sorry about my bad
English. I'll try it again:
I do not understand, how dab_cmdline is finally playing radio on my Rpi 3.
The "Callbacks" are strange to me: Do I need more applications to get a
sound and dab+ information?
As dab_cmdline is coming with no GUI (this is exactly, I'm looking for) I
would like to use dab_cmdline in RasPiCar, which is a Kodi (Python)
application. With a car, there is a need to scan the radio stations more
often than at home, because of driving around.
When using dab_cmdline with Python interface, RasPiCar would need a list
of available radio stations. Having this list, it would then use
dab_cmdline to tune the radio station. My question is, where this radio
station list is coming from. I had in mind, that a scan was already present
in qt_dab and so I suggested a new 'scan' command in dab_cmdline. But of
course, the list can also be created by a separate tool ;-)
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