Failures / sleeps in v4l plugin
-------------------------------
Key: LS-439
URL: http://dev.sourcefabric.org/browse/LS-439
Project: Liquidsoap
Issue Type: Bug
Components: Liquidsoap
Reporter: Samuel Mimram
Assignee: Samuel Mimram
We should make input.v4l faillible (it can fail when the webcam is not
available or unplugged).
Moreover, we should maybe also address this comment by David :
"When they are turned off (#sleep) operators should free resources that they
have allocated. Now that this operator allocates a thread, it should make sure
the thread exits when the operator exits - it's also important in order to
avoid having two polling threads if the operator is re-initialized. This can be
done synchronously or not. We have similar problems with several other
operators, and quite a bit of duplicated and clumsy code, which we should
factorize and cleanup at some point."
I am not sure that it really applies here though: the thread is created when
the object for the operator is created (not when the operator is initialized).
The polling thread is blocked on a condition which is signaled in get_frame:
when the operator is sleeping, the thread simply gets blocked on the condition
so it's not such a big problem...
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