player: allow overriding OSD message for all OSD levels

Until now, you could override only level 3 with --osd-status-msg. Extend
this, add add --osd-msg1 to --osd-msg3 (one for each OSD level). OSD
level 0 always means disable OSD, so that isn't included.

--osd-msg3 corresponds to --osd-status-msg, but they're not exactly the
same. To allow more customization, --osd-msgN do not include the OSD
symbol. The symbol can be manually added with "${osd-sym-cc}". We keep
the "old" option for some short-term compatibility.

--osd-msg1 should be particularly useful; for example you could do:

    --osd-msg1='${?pause==yes:${osd-sym-cc}}'

to display a "paused" symbol when paused, and nothing during normal
playback. (Although admittedly, the syntax is quite a bit of work.)

1 files changed, 1 insertions, 0 deletions

diff --git a/options/options.h b/options/options.h
index 967982ea5c..aeb404ecfe 100644
--- a/options/options.h
+++ b/options/options.h
@@ -148,6 +148,7 @@ typedef struct MPOpts {
     char *osd_playing_msg;
     char *status_msg;
     char *osd_status_msg;
+    char *osd_msg[3];
     char *heartbeat_cmd;
     float heartbeat_interval;
     int player_idle_mode;