From 3d338bda385493ba70721086fc7e8b18ed6b3a8a Mon Sep 17 00:00:00 2001
From: KubaPro010 <kuba.pro010@gmail.com>
Date: Tue, 15 Jul 2025 21:06:40 +0200
Subject: [PATCH] get rid of the lookahead

---
 filter/bs412.c | 6 +-----
 filter/bs412.h | 5 -----
 2 files changed, 1 insertion(+), 10 deletions(-)

diff --git a/filter/bs412.c b/filter/bs412.c
index deaccdc..856e21a 100644
--- a/filter/bs412.c
+++ b/filter/bs412.c
@@ -29,11 +29,7 @@ void init_bs412(BS412Compressor* mpx, float mpx_deviation, float target_power, f
 }
 
 float bs412_compress(BS412Compressor* mpx, float sample) {
-	if(mpx->lookahead_counter >= BS412_LOOKAHEAD) mpx->lookahead_counter = 0;
-	float process_sample = mpx->lookahead_samples[mpx->lookahead_counter];
-	mpx->lookahead_samples[mpx->lookahead_counter++] = sample;
-
-	mpx->average += process_sample * process_sample * mpx->mpx_deviation * mpx->mpx_deviation;
+	mpx->average += sample * sample * mpx->mpx_deviation * mpx->mpx_deviation;
 	mpx->average_counter++;
 
 	float avg_power = mpx->average / mpx->average_counter;
diff --git a/filter/bs412.h b/filter/bs412.h
index 7d7437a..07bf132 100644
--- a/filter/bs412.h
+++ b/filter/bs412.h
@@ -10,8 +10,6 @@
 #include "../lib/debug.h"
 #endif
 
-#define BS412_LOOKAHEAD 2048 // samples
-
 typedef struct
 {
 	int mpx_deviation;
@@ -23,9 +21,6 @@ typedef struct
 	float max;
 	float gain;
 	double average;
-
-	float lookahead_samples[BS412_LOOKAHEAD + 1];
-	int lookahead_counter;
 } BS412Compressor;
 
 float dbr_to_deviation(float dbr);