vo_opengl_cb: add a function to report vsync time

And also let vo.c know of it.

Currently, this does not help much, but will facilitate future
improvements.

1 files changed, 4 insertions, 0 deletions

diff --git a/player/client.c b/player/client.c
index 3593b1d99f..ef1aa4f52e 100644
--- a/player/client.c
+++ b/player/client.c
@@ -1709,6 +1709,10 @@ int mpv_opengl_cb_render(mpv_opengl_cb_context *ctx, int fbo, int vp[4])
 {
     return MPV_ERROR_NOT_IMPLEMENTED;
 }
+int mpv_opengl_cb_report_flip(mpv_opengl_cb_context *ctx, int64_t time)
+{
+    return MPV_ERROR_NOT_IMPLEMENTED;
+}
 int mpv_opengl_cb_uninit_gl(mpv_opengl_cb_context *ctx)
 {
     return MPV_ERROR_NOT_IMPLEMENTED;