From 28fa17dac66d29338d24bff217f31d38d494745c Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Thu, 2 Apr 2015 23:59:00 +0200
Subject: vf_format: allow forcing rotation flags

---
 DOCS/man/vf.rst          | 4 ++++
 video/filter/vf_format.c | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/DOCS/man/vf.rst b/DOCS/man/vf.rst
index 79055ec1a1..fb8047c201 100644
--- a/DOCS/man/vf.rst
+++ b/DOCS/man/vf.rst
@@ -310,6 +310,10 @@ Available filters are:
         Set the stereo mode the video should be displayed as. Takes the
         same values as the ``--video-stereo-mode`` option.
 
+    ``<rotate>``
+        Set the rotation the video is assumed to be encoded with in degrees.
+        The special value ``-1`` uses the input format.
+
 
 ``noformat[=fmt]``
     Restricts the color space for the next filter without doing any conversion.
diff --git a/video/filter/vf_format.c b/video/filter/vf_format.c
index 5731a6646b..e8f1bf1489 100644
--- a/video/filter/vf_format.c
+++ b/video/filter/vf_format.c
@@ -40,6 +40,7 @@ struct vf_priv_s {
     int chroma_location;
     int stereo_in;
     int stereo_out;
+    int rotate;
 };
 
 static bool is_compatible(int fmt1, int fmt2)
@@ -96,6 +97,8 @@ static int reconfig(struct vf_instance *vf, struct mp_image_params *in,
         out->stereo_in = p->stereo_in;
     if (p->stereo_out)
         out->stereo_out = p->stereo_out;
+    if (p->rotate >= 0)
+        out->rotate = p->rotate;
 
     // Make sure the user-overrides are consistent (no RGB csp for YUV, etc.).
     mp_image_params_guess_csp(out);
@@ -129,6 +132,7 @@ static const m_option_t vf_opts_fields[] = {
     OPT_CHOICE_C("chroma-location", chroma_location, 0, mp_chroma_names),
     OPT_CHOICE_C("stereo-in", stereo_in, 0, mp_stereo3d_names),
     OPT_CHOICE_C("stereo-out", stereo_out, 0, mp_stereo3d_names),
+    OPT_INTRANGE("rotate", rotate, 0, -1, 359),
     {0}
 };
 
@@ -138,4 +142,7 @@ const vf_info_t vf_info_format = {
     .open = vf_open,
     .priv_size = sizeof(struct vf_priv_s),
     .options = vf_opts_fields,
+    .priv_defaults = &(const struct vf_priv_s){
+        .rotate = -1,
+    },
 };
-- 
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