From c6b0947171ef34f0334441b663795658bda1afc7 Mon Sep 17 00:00:00 2001
From: Alex Converse <alex.converse@gmail.com>
Date: Sun, 20 Jun 2010 22:03:00 +0000
Subject: [PATCH] psdec: Replace a division with a shift.

Originally committed as revision 23667 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/ps.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/ps.c b/libavcodec/ps.c
index 7b86dd7767..acec35df73 100644
--- a/libavcodec/ps.c
+++ b/libavcodec/ps.c
@@ -20,6 +20,7 @@
  */
 
 #include <stdint.h>
+#include "libavutil/common.h"
 #include "libavutil/mathematics.h"
 #include "avcodec.h"
 #include "get_bits.h"
@@ -191,7 +192,7 @@ int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb_host, PSContext *ps
             ps->border_position[e] = get_bits(gb, 5);
     } else
         for (e = 1; e <= ps->num_env; e++)
-            ps->border_position[e] = e * numQMFSlots / ps->num_env - 1;
+            ps->border_position[e] = (e * numQMFSlots >> ff_log2_tab[ps->num_env]) - 1;
 
     if (ps->enable_iid) {
         for (e = 0; e < ps->num_env; e++) {