From c632e897a8fb4c0e266ceb1f059449d39189abd1 Mon Sep 17 00:00:00 2001
From: reimar <reimar@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Sat, 18 Dec 2004 14:06:35 +0000
Subject: add the flip filter at the end of the filter chain. Fixes -vf pp
 -flip and the flip option in the Gui.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14184 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 libmpcodecs/vd.c |  3 ++-
 libmpcodecs/vf.c | 20 ++++++++++++++++++++
 libmpcodecs/vf.h |  1 +
 3 files changed, 23 insertions(+), 1 deletion(-)

(limited to 'libmpcodecs')

diff --git a/libmpcodecs/vd.c b/libmpcodecs/vd.c
index bc56293766..439cc8383a 100644
--- a/libmpcodecs/vd.c
+++ b/libmpcodecs/vd.c
@@ -253,7 +253,8 @@ csp_again:
     if(vo_flags&VFCAP_FLIPPED) flip^=1;
     if(flip && !(vo_flags&VFCAP_FLIP)){
 	// we need to flip, but no flipping filter avail.
-	sh->vfilter=vf=vf_open_filter(vf,"flip",NULL);
+	vf_add_before_vo(&vf, "flip", NULL);
+	sh->vfilter = vf;
     }
 
     // time to do aspect ratio corrections...
diff --git a/libmpcodecs/vf.c b/libmpcodecs/vf.c
index 60108ed736..bd591163d6 100644
--- a/libmpcodecs/vf.c
+++ b/libmpcodecs/vf.c
@@ -473,6 +473,26 @@ vf_instance_t* vf_open_filter(vf_instance_t* next, char *name, char **args){
   return vf_open_plugin(filter_list,next,name,args);
 }
 
+/**
+ * \brief adds a filter before the last one (which should be the vo filter).
+ * \param vf start of the filter chain.
+ * \param name name of the filter to add.
+ * \param args argument list for the filter.
+ * \return pointer to the filter instance that was created.
+ */
+vf_instance_t* vf_add_before_vo(vf_instance_t **vf, char *name, char **args) {
+  vf_instance_t *vo, *prev = NULL, *new;
+  // Find the last filter (should be vf_vo)
+  for (vo = *vf; vo->next; vo = vo->next)
+    prev = vo;
+  new = vf_open_filter(vo, name, args);
+  if (prev)
+    prev->next = new;
+  else
+    *vf = new;
+  return new;
+}
+
 //============================================================================
 
 unsigned int vf_match_csp(vf_instance_t** vfp,unsigned int* list,unsigned int preferred){
diff --git a/libmpcodecs/vf.h b/libmpcodecs/vf.h
index fe2b62a10b..85ae9a6f89 100644
--- a/libmpcodecs/vf.h
+++ b/libmpcodecs/vf.h
@@ -77,6 +77,7 @@ mp_image_t* vf_get_image(vf_instance_t* vf, unsigned int outfmt, int mp_imgtype,
 
 vf_instance_t* vf_open_plugin(vf_info_t** filter_list, vf_instance_t* next, char *name, char **args);
 vf_instance_t* vf_open_filter(vf_instance_t* next, char *name, char **args);
+vf_instance_t* vf_add_before_vo(vf_instance_t **vf, char *name, char **args);
 vf_instance_t* vf_open_encoder(vf_instance_t* next, char *name, char *args);
 
 unsigned int vf_match_csp(vf_instance_t** vfp,unsigned int* list,unsigned int preferred);
-- 
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