X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavfilter%2Fvf_vflip.c;h=9c0e80adf535c96cd0f04d503708092f9dd2f26f;hb=5bebe94d860cb1a0819701213e961c8269aa3284;hp=ae7b9b475f78b7a471e3681137591cd13b7ee252;hpb=b70bc02279b7a382a764f6006b9bf9136dc83944;p=ffmpeg

diff --git a/libavfilter/vf_vflip.c b/libavfilter/vf_vflip.c
index ae7b9b475f7..9c0e80adf53 100644
--- a/libavfilter/vf_vflip.c
+++ b/libavfilter/vf_vflip.c
@@ -23,6 +23,7 @@
  * video vertical flip filter
  */
 
+#include "libavutil/pixdesc.h"
 #include "avfilter.h"
 
 typedef struct {
@@ -32,9 +33,8 @@ typedef struct {
 static int config_input(AVFilterLink *link)
 {
     FlipContext *flip = link->dst->priv;
-    int tmp;
 
-    avcodec_get_chroma_sub_sample(link->format, &tmp, &flip->vsub);
+    flip->vsub = av_pix_fmt_descriptors[link->format].log2_chroma_h;
 
     return 0;
 }
@@ -48,11 +48,11 @@ static AVFilterPicRef *get_video_buffer(AVFilterLink *link, int perms,
     AVFilterPicRef *picref = avfilter_get_video_buffer(link->dst->outputs[0],
                                                        perms, w, h);
 
-    picref->data[0] += (h-1) * picref->linesize[0];
-    picref->linesize[0] = -picref->linesize[0];
-    for (i = 1; i < 4; i ++) {
+    for (i = 0; i < 4; i ++) {
+        int vsub = i == 1 || i == 2 ? flip->vsub : 0;
+
         if (picref->data[i]) {
-            picref->data[i] += ((h >> flip->vsub)-1) * picref->linesize[i];
+            picref->data[i] += ((h >> vsub)-1) * picref->linesize[i];
             picref->linesize[i] = -picref->linesize[i];
         }
     }
@@ -66,11 +66,11 @@ static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
     AVFilterPicRef *ref2 = avfilter_ref_pic(picref, ~0);
     int i;
 
-    ref2->data[0] += (link->h-1) * ref2->linesize[0];
-    ref2->linesize[0] = -ref2->linesize[0];
-    for (i = 1; i < 4; i ++) {
+    for (i = 0; i < 4; i ++) {
+        int vsub = i == 1 || i == 2 ? flip->vsub : 0;
+
         if (ref2->data[i]) {
-            ref2->data[i] += ((link->h >> flip->vsub)-1) * ref2->linesize[i];
+            ref2->data[i] += ((link->h >> vsub)-1) * ref2->linesize[i];
             ref2->linesize[i] = -ref2->linesize[i];
         }
     }
@@ -78,11 +78,11 @@ static void start_frame(AVFilterLink *link, AVFilterPicRef *picref)
     avfilter_start_frame(link->dst->outputs[0], ref2);
 }
 
-static void draw_slice(AVFilterLink *link, int y, int h)
+static void draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
 {
     AVFilterContext *ctx = link->dst;
 
-    avfilter_draw_slice(ctx->outputs[0], link->h - (y+h), h);
+    avfilter_draw_slice(ctx->outputs[0], link->h - (y+h), h, -1 * slice_dir);
 }
 
 AVFilter avfilter_vf_vflip = {