From 633ddb85192f1cc39d61fae98455eb6ae5638df0 Mon Sep 17 00:00:00 2001
From: Mans Rullgard <mans@mansr.com>
Date: Sun, 9 Oct 2011 23:15:17 +0100
Subject: [PATCH] ac3dec: use get_sbits() instead of manually sign-extending
Signed-off-by: Mans Rullgard <mans@mansr.com>
---
libavcodec/ac3dec.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index 5046a5c6448..956a7ac3ad8 100644
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -505,9 +505,9 @@ static void ac3_decode_transform_coeffs_ch(AC3DecodeContext *s, int ch_index, ma
mantissa = b5_mantissas[get_bits(gbc, 4)];
break;
default: /* 6 to 15 */
- mantissa = get_bits(gbc, quantization_tab[bap]);
/* Shift mantissa and sign-extend it. */
- mantissa = (mantissa << (32-quantization_tab[bap]))>>8;
+ mantissa = get_sbits(gbc, quantization_tab[bap]);
+ mantissa <<= 24 - quantization_tab[bap];
break;
}
coeffs[freq] = mantissa >> exps[freq];
--
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