In order to give advanced control over a processing queue,
it would be better to have the checking function separated from
the osmo_gapk_pq_prepare(). Moreover, this change introduces an
additional 'strict' checking mode that requires a queue to have
a source item first and a sink item in the last position.
This change adds two meta-information fields to the processing
queue item structure. Both of them will be used for more
detailed logging and for the human-readable processing
queue description.
There are currently three types of prcessing queue items:
- source (file, alsa, rtp)
- proc (format, codec)
- sink (file, alsa, rtp)
Let's assign corresponding type for each item.
This would facilitate logging and the queue checking.
In order to simplify memory leak debugging, this change introduces
the library's internal talloc context that may be changed by
external application by calling the osmo_gapk_set_talloc_ctx().
Since this change, the libosmogapk uses the Osmocom logging
framework. By default, logging is disabled and could be enabled
by the external applications calling the osmo_gapk_log_init()
with a desired log target as an argument.
Vadim Yanitskiy