vo_opengl: force redraw when framestepping with interpolation

This might fix some problems when framestepping with interpolation
enabled. The problem here is that we want to show the non-interpolated
frame while paused. Framestepping is like unpausing the video for a
frame, and then pausing again. This draws an interpolated frame, and
redrawing on pausing is supposed to take care of this.

This possibly didn't always work, because vo->want_redraw is not checked
by the vo_control() code path. So wake up the VO thread (which takes
care of servicing redraw requests, kind of) explicitly.

The correct solution is getting rid of the public-writable want_redraw
field and replacing it with a new vo_request_redraw() function, but this
can come later.

1 files changed, 3 insertions, 1 deletions

diff --git a/video/out/vo_opengl.c b/video/out/vo_opengl.c
index 6c42531629..3985ac48a4 100644
--- a/video/out/vo_opengl.c
+++ b/video/out/vo_opengl.c
@@ -342,8 +342,10 @@ static int control(struct vo *vo, uint32_t request, void *data)
         gl_video_reset(p->renderer);
         return true;
     case VOCTRL_PAUSE:
-        if (gl_video_showing_interpolated_frame(p->renderer))
+        if (gl_video_showing_interpolated_frame(p->renderer)) {
             vo->want_redraw = true;
+            vo_wakeup(vo);
+        }
         return true;
     }