player/video: add VOCTRL_CONTENT_TYPE

mpv's core already keeps track of whether or not it thinks a track is an
image. Some VOs (i.e. wayland) would benefit from knowing if what is
currently being displayed is an image or not so add a new VOCTRL that
signals this anytime we load a new file with a VO. Additionally, let's
add a helper enum for signaling the kind of content that is being
displayed. There is now MP_CONTENT_NONE (strictly for force window being
used on a track with no image/video), MP_CONTENT_IMAGE, and
MP_CONTENT_VIDEO. See the next commit for the actual usage of this (with
wayland).

1 files changed, 9 insertions, 0 deletions

diff --git a/video/out/vo.h b/video/out/vo.h
index 8ccfe3ccfe..c7ac9c9c59 100644
--- a/video/out/vo.h
+++ b/video/out/vo.h
@@ -95,6 +95,8 @@ enum mp_voctrl {
 
     VOCTRL_SET_CURSOR_VISIBILITY,       // bool*
 
+    VOCTRL_CONTENT_TYPE,                // enum mp_content_type*
+
     VOCTRL_KILL_SCREENSAVER,
     VOCTRL_RESTORE_SCREENSAVER,
 
@@ -129,6 +131,13 @@ enum mp_voctrl {
     VOCTRL_EXTERNAL_RESIZE,
 };
 
+// Helper to expose what kind of content is curently playing to the VO.
+enum mp_content_type {
+    MP_CONTENT_NONE, // used for force-window
+    MP_CONTENT_IMAGE,
+    MP_CONTENT_VIDEO,
+};
+
 #define VO_TRUE         true
 #define VO_FALSE        false
 #define VO_ERROR        -1