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ac3dec: use get_sbits() instead of manually sign-extending 

Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2011-10-09 23:15:17 +01:00
parent 84dda40762
commit 633ddb8519
1 changed files with 2 additions and 2 deletions
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4
libavcodec/ac3dec.c
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@ -505,9 +505,9 @@ static void ac3_decode_transform_coeffs_ch(AC3DecodeContext *s, int ch_index, ma
mantissa = b5_mantissas[get_bits(gbc, 4)]; mantissa = b5_mantissas[get_bits(gbc, 4)];
break; break;
default: /* 6 to 15 */ default: /* 6 to 15 */
mantissa = get_bits(gbc, quantization_tab[bap]);
/* Shift mantissa and sign-extend it. */ /* 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; break;
} }
coeffs[freq] = mantissa >> exps[freq]; coeffs[freq] = mantissa >> exps[freq];