From feb10af9f8397ac3930990c2ddf458ad18010084 Mon Sep 17 00:00:00 2001
From: Kurausukun <lord.uber1@gmail.com>
Date: Sun, 1 Nov 2020 23:35:10 -0500
Subject: Match FadeOutBody (ported from pokeemerald)

---
 src/m4a.c | 35 +++++------------------------------
 1 file changed, 5 insertions(+), 30 deletions(-)

(limited to 'src')

diff --git a/src/m4a.c b/src/m4a.c
index 6f2118f31..8772b6f2f 100644
--- a/src/m4a.c
+++ b/src/m4a.c
@@ -670,28 +670,17 @@ void FadeOutBody(struct MusicPlayerInfo *mplayInfo)
     s32 i;
     struct MusicPlayerTrack *track;
     u16 fadeOV;
-#ifdef NONMATCHING
-    u16 mask;
-#else
-    register u16 mask asm("r2");
-#endif // NONMATCHING
 
     if (mplayInfo->fadeOI == 0)
         return;
-
-    mplayInfo->fadeOC--;
-    mask = 0xFFFF;
-
-    if (mplayInfo->fadeOC != 0)
+    if (--mplayInfo->fadeOC != 0)
         return;
 
     mplayInfo->fadeOC = mplayInfo->fadeOI;
 
     if (mplayInfo->fadeOV & FADE_IN)
     {
-        mplayInfo->fadeOV += (4 << FADE_VOL_SHIFT);
-
-        if ((u16)(mplayInfo->fadeOV & mask) >= (64 << FADE_VOL_SHIFT))
+        if ((u16)(mplayInfo->fadeOV += (4 << FADE_VOL_SHIFT)) >= (64 << FADE_VOL_SHIFT))
         {
             mplayInfo->fadeOV = (64 << FADE_VOL_SHIFT);
             mplayInfo->fadeOI = 0;
@@ -699,14 +688,9 @@ void FadeOutBody(struct MusicPlayerInfo *mplayInfo)
     }
     else
     {
-        mplayInfo->fadeOV -= (4 << FADE_VOL_SHIFT);
-
-        if ((s16)(mplayInfo->fadeOV & mask) <= 0)
+        if ((s16)(mplayInfo->fadeOV -= (4 << FADE_VOL_SHIFT)) <= 0)
         {
-            i = mplayInfo->trackCount;
-            track = mplayInfo->tracks;
-
-            while (i > 0)
+            for (i = mplayInfo->trackCount, track = mplayInfo->tracks; i > 0; i--, track++)
             {
                 u32 val;
 
@@ -718,9 +702,6 @@ void FadeOutBody(struct MusicPlayerInfo *mplayInfo)
 
                 if (!val)
                     track->flags = 0;
-
-                i--;
-                track++;
             }
 
             if (mplayInfo->fadeOV & TEMPORARY_FADE)
@@ -733,10 +714,7 @@ void FadeOutBody(struct MusicPlayerInfo *mplayInfo)
         }
     }
 
-    i = mplayInfo->trackCount;
-    track = mplayInfo->tracks;
-
-    while (i > 0)
+    for (i = mplayInfo->trackCount, track = mplayInfo->tracks; i > 0; i--, track++)
     {
         if (track->flags & MPT_FLG_EXIST)
         {
@@ -745,9 +723,6 @@ void FadeOutBody(struct MusicPlayerInfo *mplayInfo)
             track->volX = (fadeOV >> FADE_VOL_SHIFT);
             track->flags |= MPT_FLG_VOLCHG;
         }
-
-        i--;
-        track++;
     }
 }
 
-- 
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