From 565b12d0357e2d040b554bfb02fdeacd9bb42530 Mon Sep 17 00:00:00 2001
From: Ryan Dwyer <ryandwyer1@gmail.com>
Date: Sat, 9 Jan 2021 01:56:12 +1000
Subject: [PATCH] Decompile func0f095278

---
 src/game/game_0150a0.c         |  2 +-
 src/game/game_092610.c         | 65 ++++++++--------------------------
 src/game/game_166e40.c         |  2 +-
 src/include/game/game_092610.h |  2 +-
 src/include/game/game_166e40.h |  2 +-
 src/include/types.h            |  2 +-
 6 files changed, 20 insertions(+), 55 deletions(-)

diff --git a/src/game/game_0150a0.c b/src/game/game_0150a0.c
index 01d8fb673..d9f55ca42 100644
--- a/src/game/game_0150a0.c
+++ b/src/game/game_0150a0.c
@@ -18,7 +18,7 @@ void func0f0150a0(void)
 
 	for (i = 0; i < (IS4MB() ? 30 : 40); i++) {
 		if (g_AudioChannels[i].flags & AUDIOCHANNELFLAG_0010) {
-			func0000fbc4(g_AudioChannels[i].unk26);
+			func0000fbc4(g_AudioChannels[i].filenum);
 			g_AudioChannels[i].flags &= ~AUDIOCHANNELFLAG_0010;
 			g_AudioChannels[i].flags &= ~AUDIOCHANNELFLAG_0002;
 		} else if (g_AudioChannels[i].audiohandle && audioIsPlaying(g_AudioChannels[i].audiohandle)) {
diff --git a/src/game/game_092610.c b/src/game/game_092610.c
index 8e946d55f..ee4e90dba 100644
--- a/src/game/game_092610.c
+++ b/src/game/game_092610.c
@@ -225,7 +225,7 @@ void func0f092a98(s32 channelnum)
 	}
 
 	if ((channel->flags & AUDIOCHANNELFLAG_0010)) {
-		func0000fbc4(channel->unk26);
+		func0000fbc4(channel->filenum);
 	} else if (channel->audiohandle && audioIsPlaying(channel->audiohandle)) {
 		audioStop(channel->audiohandle);
 	}
@@ -3030,52 +3030,17 @@ glabel func0f095200
 /*  f095274:	00000000 */ 	nop
 );
 
-GLOBAL_ASM(
-glabel func0f095278
-/*  f095278:	00047100 */ 	sll	$t6,$a0,0x4
-/*  f09527c:	3c0f8007 */ 	lui	$t7,%hi(g_AudioChannels)
-/*  f095280:	8defae10 */ 	lw	$t7,%lo(g_AudioChannels)($t7)
-/*  f095284:	01c47023 */ 	subu	$t6,$t6,$a0
-/*  f095288:	27bdffe8 */ 	addiu	$sp,$sp,-24
-/*  f09528c:	000e70c0 */ 	sll	$t6,$t6,0x3
-/*  f095290:	afbf0014 */ 	sw	$ra,0x14($sp)
-/*  f095294:	0480001d */ 	bltz	$a0,.L0f09530c
-/*  f095298:	01cf1821 */ 	addu	$v1,$t6,$t7
-/*  f09529c:	3c188009 */ 	lui	$t8,%hi(g_Is4Mb)
-/*  f0952a0:	93180af0 */ 	lbu	$t8,%lo(g_Is4Mb)($t8)
-/*  f0952a4:	24010001 */ 	addiu	$at,$zero,0x1
-/*  f0952a8:	24020028 */ 	addiu	$v0,$zero,0x28
-/*  f0952ac:	17010003 */ 	bne	$t8,$at,.L0f0952bc
-/*  f0952b0:	00000000 */ 	nop
-/*  f0952b4:	10000001 */ 	b	.L0f0952bc
-/*  f0952b8:	2402001e */ 	addiu	$v0,$zero,0x1e
-.L0f0952bc:
-/*  f0952bc:	0082082a */ 	slt	$at,$a0,$v0
-/*  f0952c0:	50200013 */ 	beqzl	$at,.L0f095310
-/*  f0952c4:	2402ffff */ 	addiu	$v0,$zero,-1
-/*  f0952c8:	94620030 */ 	lhu	$v0,0x30($v1)
-/*  f0952cc:	30590001 */ 	andi	$t9,$v0,0x1
-/*  f0952d0:	1720000e */ 	bnez	$t9,.L0f09530c
-/*  f0952d4:	30480010 */ 	andi	$t0,$v0,0x10
-/*  f0952d8:	5100000d */ 	beqzl	$t0,.L0f095310
-/*  f0952dc:	2402ffff */ 	addiu	$v0,$zero,-1
-/*  f0952e0:	84620026 */ 	lh	$v0,0x26($v1)
-/*  f0952e4:	0fc59b9f */ 	jal	fileGetRomSizeByFileNum
-/*  f0952e8:	304407ff */ 	andi	$a0,$v0,0x7ff
-/*  f0952ec:	00024900 */ 	sll	$t1,$v0,0x4
-/*  f0952f0:	01224823 */ 	subu	$t1,$t1,$v0
-/*  f0952f4:	00094880 */ 	sll	$t1,$t1,0x2
-/*  f0952f8:	24010c00 */ 	addiu	$at,$zero,0xc00
-/*  f0952fc:	0121001a */ 	div	$zero,$t1,$at
-/*  f095300:	00001012 */ 	mflo	$v0
-/*  f095304:	10000003 */ 	b	.L0f095314
-/*  f095308:	8fbf0014 */ 	lw	$ra,0x14($sp)
-.L0f09530c:
-/*  f09530c:	2402ffff */ 	addiu	$v0,$zero,-1
-.L0f095310:
-/*  f095310:	8fbf0014 */ 	lw	$ra,0x14($sp)
-.L0f095314:
-/*  f095314:	27bd0018 */ 	addiu	$sp,$sp,0x18
-/*  f095318:	03e00008 */ 	jr	$ra
-/*  f09531c:	00000000 */ 	nop
-);
+s32 func0f095278(s32 channelnum)
+{
+	struct audiochannel *channel = &g_AudioChannels[channelnum];
+
+	if (channelnum >= 0 && channelnum < (IS4MB() ? 30 : 40)) {
+		if ((channel->flags & AUDIOCHANNELFLAG_IDLE) == 0
+				&& (channel->flags & AUDIOCHANNELFLAG_0010)) {
+			s32 filenum = channel->filenum;
+			return fileGetRomSizeByFileNum(filenum & 0x7ff) * 60 / 3072;
+		}
+	}
+
+	return -1;
+}
diff --git a/src/game/game_166e40.c b/src/game/game_166e40.c
index 84437b183..02b10ce80 100644
--- a/src/game/game_166e40.c
+++ b/src/game/game_166e40.c
@@ -35,7 +35,7 @@ u32 fileGetRomSizeByTableAddress(u32 *filetableaddr)
 	return difference;
 }
 
-u32 fileGetRomSizeByFileNum(s32 filenum)
+s32 fileGetRomSizeByFileNum(s32 filenum)
 {
 	return fileGetRomSizeByTableAddress((u32 *)&filetable[filenum]);
 }
diff --git a/src/include/game/game_092610.h b/src/include/game/game_092610.h
index 4fb9c2e25..99353f8a9 100644
--- a/src/include/game/game_092610.h
+++ b/src/include/game/game_092610.h
@@ -27,6 +27,6 @@ u32 func0f094d78(void);
 u32 func0f094ef4(void);
 u32 func0f09505c(void);
 u32 func0f095200(void);
-u32 func0f095278(void);
+s32 func0f095278(s32 channelnum);
 
 #endif
diff --git a/src/include/game/game_166e40.h b/src/include/game/game_166e40.h
index 683b13272..f09342795 100644
--- a/src/include/game/game_166e40.h
+++ b/src/include/game/game_166e40.h
@@ -5,7 +5,7 @@
 
 void *fileGetRomAddress(s32 filenum);
 u32 fileGetRomSizeByTableAddress(u32 *filetableaddr);
-u32 fileGetRomSizeByFileNum(s32 filenum);
+s32 fileGetRomSizeByFileNum(s32 filenum);
 u32 func0f166ea8(void);
 void func0f166eb4(void *ptr, u32 len, void *table, struct fileinfo *info);
 void func0f166f74(void);
diff --git a/src/include/types.h b/src/include/types.h
index 4a4dd3416..b3d7e4f72 100644
--- a/src/include/types.h
+++ b/src/include/types.h
@@ -6688,7 +6688,7 @@ struct audiochannel {
 	/*0x1c*/ u32 unk1c;
 	/*0x20*/ u32 unk20;
 	/*0x24*/ u16 unk24;
-	/*0x26*/ s16 unk26;
+	/*0x26*/ s16 filenum;
 	/*0x28*/ s16 unk28;
 	/*0x2c*/ u32 unk2c;
 	/*0x30*/ u16 flags;