From 349067a6ab2d03024b3e984e80314f303dd14432 Mon Sep 17 00:00:00 2001
From: Julian <MyFakeAcc.4@googlemail.com>
Date: Mon, 9 Feb 2015 00:05:09 +0100
Subject: vf_vapoursynth: add display refresh rate property

This value is not necessarily trustworthy (it might change) and can be
0.
---
 DOCS/man/vf.rst               | 3 +++
 player/video.c                | 2 ++
 video/filter/vf.h             | 1 +
 video/filter/vf_vapoursynth.c | 1 +
 4 files changed, 7 insertions(+)

diff --git a/DOCS/man/vf.rst b/DOCS/man/vf.rst
index 41ca08beeb..bfc6e5d53d 100644
--- a/DOCS/man/vf.rst
+++ b/DOCS/man/vf.rst
@@ -649,6 +649,9 @@ Available filters are:
 
         Useful for some filters which insist on having a FPS.
 
+    ``display_fps``
+        Refresh rate of the current display. Note that this value can be 0.
+
 ``vapoursynth-lazy``
     The same as ``vapoursynth``, but doesn't load Python scripts. Instead, a
     custom backend using Lua and the raw VapourSynth API is used. The syntax
diff --git a/player/video.c b/player/video.c
index 29dcb3b066..a13b2696ed 100644
--- a/player/video.c
+++ b/player/video.c
@@ -180,6 +180,8 @@ static void recreate_video_filters(struct MPContext *mpctx)
     d_video->vfilter->wakeup_callback = wakeup_playloop;
     d_video->vfilter->wakeup_callback_ctx = mpctx;
     d_video->vfilter->container_fps = d_video->fps;
+    vo_control(mpctx->video_out, VOCTRL_GET_DISPLAY_FPS,
+        &d_video->vfilter->display_fps);
 
     vf_append_filter_list(d_video->vfilter, opts->vf_settings);
 
diff --git a/video/filter/vf.h b/video/filter/vf.h
index b27f27e743..23791e679a 100644
--- a/video/filter/vf.h
+++ b/video/filter/vf.h
@@ -122,6 +122,7 @@ struct vf_chain {
     uint8_t allowed_output_formats[IMGFMT_END - IMGFMT_START];
 
     double container_fps;
+    double display_fps;
 
     struct mp_log *log;
     struct MPOpts *opts;
diff --git a/video/filter/vf_vapoursynth.c b/video/filter/vf_vapoursynth.c
index a4927216bb..8ae8add8b3 100644
--- a/video/filter/vf_vapoursynth.c
+++ b/video/filter/vf_vapoursynth.c
@@ -592,6 +592,7 @@ static int reinit_vs(struct vf_instance *vf)
     p->vsapi->propSetInt(vars, "video_in_dw", p->fmt_in.d_w, 0);
     p->vsapi->propSetInt(vars, "video_in_dh", p->fmt_in.d_h, 0);
     p->vsapi->propSetFloat(vars, "container_fps", vf->chain->container_fps, 0);
+    p->vsapi->propSetFloat(vars, "display_fps", vf->chain->display_fps, 0);
 
     if (p->drv->load(vf, vars) < 0)
         goto error;
-- 
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