player: use demux_open_url() to open main files

Instead of opening a stream and then a demuxer, do both at once with
demux_open_url().

This requires some awkward additions to demuxer_params, because there
are some weird features associated with opening the main file. E.g. the
relatively useless --stream-capture features requires enabling capturing
on the stream before the demuxer is opened, but on the other hand
shouldn't be done on secondary files like external subtitles.

Also relatively bad: since demux_open_url() returns just a demuxer
pointer or NULL, additional error reporting is done via demuxer_params.

Still, at least conceptually, it's ok, and simpler than before.

0 files changed, 0 insertions, 0 deletions