From 7d4b890a7f8c8587b2667599eee8c83da8a9b2b2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20Hamal=20Dvo=C5=99=C3=A1k?= <mordae@anilinux.org>
Date: Thu, 6 Jun 2024 20:59:07 +0200
Subject: [PATCH] Optimize DC removal a bit

---
 src/main.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/main.c b/src/main.c
index 75ed269..f93d970 100644
--- a/src/main.c
+++ b/src/main.c
@@ -476,8 +476,9 @@ static void rf_rx(void)
 			int I32 = cos_neg - cos_pos;
 			int64_t I = I32;
 
-			dcI = ((dcI << 16) - dcI + (I << 16)) >> 16;
-			I -= dcI >> 16;
+			int64_t I16 = I << 16;
+			dcI = ((dcI << 16) - dcI + I16) >> 16;
+			I = (I16 - dcI) >> 16;
 
 			I *= gain;
 			I /= max_amplitude;
@@ -489,8 +490,9 @@ static void rf_rx(void)
 			int Q32 = sin_neg - sin_pos;
 			int64_t Q = Q32;
 
-			dcQ = ((dcQ << 16) - dcQ + (Q << 16)) >> 16;
-			Q -= dcQ >> 16;
+			int64_t Q16 = Q << 16;
+			dcQ = ((dcQ << 16) - dcQ + Q16) >> 16;
+			Q = (Q16 - dcQ) >> 16;
 
 			Q *= gain;
 			Q /= max_amplitude;