From 8b0de73464fcb110dce2f5601e4e27b2cbd33d20 Mon Sep 17 00:00:00 2001 From: Mans Rullgard Date: Sat, 11 Aug 2012 01:54:15 +0100 Subject: [PATCH] g723.1: deobfuscate "(x << 4) - x" to "15 * x" The compiler performs this optimisation. Signed-off-by: Mans Rullgard --- libavcodec/g723_1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/g723_1.c b/libavcodec/g723_1.c index 7d8a48e..d4158ff 100644 --- a/libavcodec/g723_1.c +++ b/libavcodec/g723_1.c @@ -914,7 +914,7 @@ static void gain_scale(G723_1_Context *p, int16_t * buf, int energy) } for (i = 0; i < SUBFRAME_LEN; i++) { - p->pf_gain = ((p->pf_gain << 4) - p->pf_gain + gain + (1 << 3)) >> 4; + p->pf_gain = (15 * p->pf_gain + gain + (1 << 3)) >> 4; buf[i] = av_clip_int16((buf[i] * (p->pf_gain + (p->pf_gain >> 4)) + (1 << 10)) >> 11); } -- 2.7.4