player: make watch later/resume work when "playing" directories

If you do "mpv /bla/", and then branch out into sub-directories using
playlist navigation, and then used quit and watch later, then playing
the same directory did not resume from the previous point. This was
because resuming is based on the path hash, so a path prefix can't be
detected when resuming the parent directory.

Solve this by writing each path prefix when playing directories is
involved. (This includes all parent paths, so interestingly, "mpv /"
would also resume in the above example.)

Something like this was requested multiple times, and I want it too.

1 files changed, 2 insertions, 0 deletions

diff --git a/options/path.h b/options/path.h
index 763a8dda54..203651a931 100644
--- a/options/path.h
+++ b/options/path.h
@@ -65,6 +65,8 @@ char *mp_splitext(const char *path, bstr *root);
  */
 struct bstr mp_dirname(const char *path);
 
+void mp_path_strip_trailing_separator(char *path);
+
 /* Join two path components and return a newly allocated string
  * for the result. '/' is inserted between the components if needed.
  * If p2 is an absolute path then the value of p1 is ignored.