player: enable cache and demuxer thread for subtitles too

Includes some logic for not starting the demuxer thread for fully read
subtitles. (Well, the cache will still waste _lots_ of resources, and
the cache always has to be created, because we don't know whether it'll
be needed _before_ opening the file.)

See #1597.

1 files changed, 2 insertions, 0 deletions

diff --git a/player/sub.c b/player/sub.c
index 16affc4448..f4c9e7822b 100644
--- a/player/sub.c
+++ b/player/sub.c
@@ -321,6 +321,8 @@ static void reinit_subdec(struct MPContext *mpctx, struct track *track,
     if (!track->preloaded && track->is_external && !opts->sub_clear_on_seek) {
         demux_seek(track->demuxer, 0, SEEK_ABSOLUTE);
         track->preloaded = sub_read_all_packets(dec_sub, track->stream);
+        if (track->preloaded)
+            demux_stop_thread(track->demuxer);
     }
 }