Fix vp3_draw_horiz_band to calculate chroma offsets correctly

[ffmpeg] / libavcodec / vp3.c

diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c
index 6c76269b09686e9e13894affdc13277785284039..28e1eacceebfdf33df2eab18dbf36c2cb322afc9 100644 (file)
--- a/libavcodec/vp3.c
+++ b/libavcodec/vp3.c
@@ -1329,7 +1329,7 @@ static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y)
         y = s->height - y - h;
     }
 
-    cy = y >> 1;
+    cy = y >> s->chroma_y_shift;
     offset[0] = s->current_frame.linesize[0]*y;
     offset[1] = s->current_frame.linesize[1]*cy;
     offset[2] = s->current_frame.linesize[2]*cy;