From 3d92926a902017e7cf1f5738e99ff62da596ce12 Mon Sep 17 00:00:00 2001
From: Ethan Werner <mail@ethanwerner.com>
Date: Sun, 9 Aug 2026 15:02:21 +0400
Subject: refactor

---
 lib/mesa_sine_wave.c | 50 +++++++++++++++++++++++++-------------------------
 1 file changed, 25 insertions(+), 25 deletions(-)

(limited to 'lib/mesa_sine_wave.c')

diff --git a/lib/mesa_sine_wave.c b/lib/mesa_sine_wave.c
index 8ed5fa6..91fbcd2 100644
--- a/lib/mesa_sine_wave.c
+++ b/lib/mesa_sine_wave.c
@@ -24,7 +24,7 @@ ts_parameter_t const ts_mesa_sine_wave_p = { .n_inputs = 1, .n_outputs = 2, .n_c
 uint_t ts_mesa_sine_wave_offset( ts_constant_t const *c )
 {
 	( void )c;
-	return ( c ? ((ts_mesa_sine_wave_params_t *)c)->k : 0 );
+	return ( c ? ((ts_mesa_sine_wave_params_t const *)c)->k : 0 );
 }
 
 int ts_mesa_sine_wave(
@@ -35,64 +35,64 @@ int ts_mesa_sine_wave(
 {
 	TS_PROLOGUE( ts_mesa_sine_wave_p );
 	if ( !c ) return -1;
-    uint_t k = ((ts_mesa_sine_wave_params_t *)c)->k;
+    uint_t k = ((ts_mesa_sine_wave_params_t const *)c)->k;
     if (k < 2 || n < k) return -1;
 
-    fp_t *sma = calloc(n, sizeof(fp_t));
-    if (!sma) return -1;
+ fp_t *sma = calloc( n, sizeof( fp_t ) );
+    if ( !sma ) return -1;
 
-    for (uint_t i = 0; i < n; ++i)
+    for ( uint_t i = 0; i < n; ++i )
     {
-        if (i < k - 1)
+        if ( i < k - 1 )
         {
             fp_t sum = 0;
-            for (uint_t j = 0; j <= i; ++j)
+            for ( uint_t j = 0; j <= i; ++j )
                 sum += x[0][j];
-            sma[i] = sum / (i + 1);
+            sma[i] = sum / (fp_t)( i + 1 );
         }
         else
         {
             fp_t sum = 0;
-            for (uint_t j = i - k + 1; j <= i; ++j)
+            for ( uint_t j = i - k + 1; j <= i; ++j )
                 sum += x[0][j];
-            sma[i] = sum / k;
+            sma[i] = sum / (fp_t)k;
         }
     }
 
     fp_t ema_roc = 0;
     uint_t ema_period = 5;
-    fp_t ema_a = 2.0 / (ema_period + 1);
+    fp_t ema_a = 2.0 / ( (fp_t)ema_period + 1 );
     fp_t phase = 0;
     int_t first = 1;
 
-    for (uint_t j = 0; j < n && j < k; ++j) { y[0][j] = 0; y[1][j] = 0; }
-    for (uint_t i = k; i < n; ++i)
+    for ( uint_t j = 0; j < n && j < k; ++j ) { y[0][j] = 0; y[1][j] = 0; }
+    for ( uint_t i = k; i < n; ++i )
     {
         fp_t roc = sma[i] - sma[i - 2];
 
-        if (first)
+        if ( first )
         {
             ema_roc = roc;
             first = 0;
         }
         else
         {
-            ema_roc = ema_roc + ema_a * (roc - ema_roc);
+            ema_roc = ema_roc + ema_a * ( roc - ema_roc );
         }
 
         fp_t smoothed = ema_roc;
-        if (smoothed > 1.0) smoothed = 1.0;
-        if (smoothed < 0.01) smoothed = 0.01;
+        if ( smoothed > 1.0 ) smoothed = 1.0;
+        if ( smoothed < 0.01 ) smoothed = 0.01;
 
         fp_t wperiod = 2 * PI / smoothed;
-        if (wperiod < 5) wperiod = 5;
-        if (wperiod > 12) wperiod = 12;
+        if ( wperiod < 5 ) wperiod = 5;
+        if ( wperiod > 12 ) wperiod = 12;
 
-        if (smoothed >= 1.0)
+        if ( smoothed >= 1.0 )
         {
             phase = 0;
         }
-        else if (smoothed <= 0.01)
+        else if ( smoothed <= 0.01 )
         {
             phase = 2 * PI;
         }
@@ -100,13 +100,13 @@ int ts_mesa_sine_wave(
         {
             phase += 2 * PI / wperiod;
         }
-        while (phase > 2 * PI) phase -= 2 * PI;
+        while ( phase > 2 * PI ) phase -= 2 * PI;
 
-        y[0][i] = cos(phase);
-        y[1][i] = cos(phase + PI / 2);
+        y[0][i] = cos( phase );
+        y[1][i] = cos( phase + PI / 2 );
     }
 
-    free(sma);
+    free( sma );
 	return 0;
 }
 
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