From 724b8f6ac790550caddbf6a7644fba6beb0acf47 Mon Sep 17 00:00:00 2001 From: Justin Ruggles Date: Mon, 25 May 2009 16:12:51 +0000 Subject: eac3dec: get rid of unnecessary left shifts in 16-bit * 24-bit multiplication in GAQ mantissa ramapping. Originally committed as revision 18941 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/eac3dec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'libavcodec/eac3dec.c') diff --git a/libavcodec/eac3dec.c b/libavcodec/eac3dec.c index 92d6bdcfd0..d92d54e3e4 100644 --- a/libavcodec/eac3dec.c +++ b/libavcodec/eac3dec.c @@ -186,13 +186,13 @@ void ff_eac3_decode_transform_coeffs_aht_ch(AC3DecodeContext *s, int ch) b = 1 << (23 - log_gain); else b = ff_eac3_gaq_remap_2_4_b[hebap-8][log_gain-1] << 8; - mant += (((ff_eac3_gaq_remap_2_4_a[hebap-8][log_gain-1] << 8) * (int64_t)mant) >> 23) + b; + mant += ((ff_eac3_gaq_remap_2_4_a[hebap-8][log_gain-1] * (int64_t)mant) >> 15) + b; } else { /* small mantissa, no GAQ, or Gk=1 */ mant <<= 24 - bits; if (!log_gain) { /* remap mantissa value for no GAQ or Gk=1 */ - mant += ((ff_eac3_gaq_remap_1[hebap-8] << 8) * (int64_t)mant) >> 23; + mant += (ff_eac3_gaq_remap_1[hebap-8] * (int64_t)mant) >> 15; } } s->pre_mantissa[ch][bin][blk] = mant; -- cgit v1.2.3