From: benoit <benoit@9553f0bf-9b14-0410-a0b8-cfaf0461ba5b>
Date: Tue, 3 Mar 2009 13:11:10 +0000 (+0000)
Subject: Use sign_extend().
X-Git-Url: https://rtime.felk.cvut.cz/gitweb/frescor/ffmpeg.git/commitdiff_plain/49430ae8860809d0e91d42da6709f691aab71e06

Use sign_extend().
On behalf of Jai.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@17759 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b
---

diff --git a/libavcodec/alacenc.c b/libavcodec/alacenc.c
index 9fd506451..886b6c68b 100644
--- a/libavcodec/alacenc.c
+++ b/libavcodec/alacenc.c
@@ -23,6 +23,7 @@
 #include "bitstream.h"
 #include "dsputil.h"
 #include "lpc.h"
+#include "mathops.h"
 
 #define DEFAULT_FRAME_SIZE        4096
 #define DEFAULT_SAMPLE_SIZE       16
@@ -253,8 +254,8 @@ static void alac_linear_predictor(AlacEncodeContext *s, int ch)
 
             sum >>= lpc.lpc_quant;
             sum += samples[0];
-            residual[i] = (samples[lpc.lpc_order+1] - sum) << (32 - s->write_sample_size) >>
-                          (32 - s->write_sample_size);
+            residual[i] = sign_extend(samples[lpc.lpc_order+1] - sum,
+                                      s->write_sample_size);
             res_val = residual[i];
 
             if(res_val) {