avcodec/wma: Fix undefined shift in ff_wma_run_level_decode()

Found-by: Clang -fsanitize=shift Reported-by: Thierry Foucu <tfoucu@google.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
10 years ago · bd4c4c868c
parent e5dfa43619
commit bd4c4c868c
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/wma.c
+++ b/libavcodec/wma.c
@ -451,7 +451,7 @@ int ff_wma_run_level_decode(AVCodecContext *avctx, GetBitContext *gb,
            /** normal code */
            offset                  += run_table[code];
            sign                     = get_bits1(gb) - 1;
-            iptr[offset & coef_mask] = ilvl[code] ^ sign << 31;
+            iptr[offset & coef_mask] = ilvl[code] ^ (sign & 0x80000000);
        } else if (code == 1) {
            /** EOB */
            break;