From 15dc663a153bdd087205a7c06dc8e1728a48cb44 Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Tue, 20 Dec 2022 15:07:58 -0500
Subject: [PATCH] POKEY: remove dithering

we only use 16-bit output anyway
---
 src/engine/platform/sound/pokey/mzpokeysnd.c | 19 +------------------
 src/engine/platform/sound/pokey/mzpokeysnd.h |  1 -
 2 files changed, 1 insertion(+), 19 deletions(-)

diff --git a/src/engine/platform/sound/pokey/mzpokeysnd.c b/src/engine/platform/sound/pokey/mzpokeysnd.c
index 6395f31df..9594bd5a8 100644
--- a/src/engine/platform/sound/pokey/mzpokeysnd.c
+++ b/src/engine/platform/sound/pokey/mzpokeysnd.c
@@ -1637,23 +1637,6 @@ void Update_pokey_sound_mz(PokeyState* ps, unsigned short addr, unsigned char va
 
 #define MAX_SAMPLE 152
 
-void mzpokeysnd_process_8(PokeyState* ps, void* sndbuffer, int sndn)
-{
-    int i;
-    int nsam = sndn;
-    unsigned char *buffer = (unsigned char *) sndbuffer;
-
-    /* if there are two pokeys, then the signal is stereo
-       we assume even sndn */
-    while(nsam >= 1)
-    {
-        buffer[0] = (unsigned char)floor(generate_sample(ps)
-         * (255.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95) + 128 + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
-        buffer += 1;
-        nsam -= 1;
-    }
-}
-
 void mzpokeysnd_process_16(PokeyState* ps, void* sndbuffer, int sndn)
 {
     int i;
@@ -1665,7 +1648,7 @@ void mzpokeysnd_process_16(PokeyState* ps, void* sndbuffer, int sndn)
     while(nsam >= (int) 1)
     {
         buffer[0] = (short)floor(generate_sample(ps)
-         * (65535.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95) + 0.5 + 0.5 * rand() / RAND_MAX - 0.25);
+         * (65535.0 / 2 / MAX_SAMPLE / 4 * M_PI * 0.95));
         buffer += 1;
         nsam -= 1;
     }
diff --git a/src/engine/platform/sound/pokey/mzpokeysnd.h b/src/engine/platform/sound/pokey/mzpokeysnd.h
index 4f795087e..01da7afff 100644
--- a/src/engine/platform/sound/pokey/mzpokeysnd.h
+++ b/src/engine/platform/sound/pokey/mzpokeysnd.h
@@ -149,7 +149,6 @@ typedef struct stPokeyState
     int outvol_3;
 } PokeyState;
 
-void mzpokeysnd_process_8(PokeyState* ps, void* sndbuffer, int sndn);
 void mzpokeysnd_process_16(PokeyState* ps, void* sndbuffer, int sndn);
 void Update_pokey_sound_mz(PokeyState* ps, unsigned short addr, unsigned char val, unsigned char gain);