From 32c05e6a3df4481b82e086b8389b19af261e831c Mon Sep 17 00:00:00 2001
From: fgsfds <derp.primus@gmail.com>
Date: Sun, 6 Aug 2023 01:18:07 +0200
Subject: [PATCH] port: swap sequence headers

---
 port/include/preprocess.h |  1 +
 port/src/preprocess.c     | 17 +++++++++++++----
 src/lib/snd.c             |  6 ++++++
 3 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/port/include/preprocess.h b/port/include/preprocess.h
index 33faaed1a..5d930dcd5 100644
--- a/port/include/preprocess.h
+++ b/port/include/preprocess.h
@@ -10,6 +10,7 @@ void preprocessMpConfigs(u8 *data, u32 size);
 void preprocessFont(u8 *data, u32 size);
 void preprocessJpnFont(u8 *data, u32 size);
 void preprocessALBankFile(u8 *data, u32 size);
+void preprocessALCMidiHdr(u8 *data, u32 size);
 void preprocessSequences(u8 *data, u32 size);
 void preprocessFiringRange(u8 *data, u32 size);
 void preprocessTexturesList(u8 *data, u32 size);
diff --git a/port/src/preprocess.c b/port/src/preprocess.c
index dd1121f8f..419229515 100644
--- a/port/src/preprocess.c
+++ b/port/src/preprocess.c
@@ -48,7 +48,7 @@ static inline u32 swapUnk(u32 x) { assert(0 && "unknown type"); return x; }
 
 static inline void preprocessALWaveTable(ALWaveTable *tbl, u8 *bankBase)
 {
-	if ((uintptr_t)tbl->base < 0x02000000) {
+	if ((uintptr_t)tbl->base < 0x02000000 && tbl->len >= 0) {
 		// already swapped (maybe come up with a better check)
 		return;
 	}
@@ -94,7 +94,7 @@ static inline void preprocessALWaveTable(ALWaveTable *tbl, u8 *bankBase)
 
 static inline void preprocessALSound(ALSound *snd, u8 *bankBase)
 {
-	if ((uintptr_t)snd->wavetable < 0x02000000) {
+	if ((uintptr_t)snd->wavetable < 0x02000000 && (uintptr_t)snd->envelope < 0x02000000 && (uintptr_t)snd->keyMap < 0x02000000) {
 		// already swapped (maybe come up with a better check)
 		return;
 	}
@@ -119,7 +119,7 @@ static inline void preprocessALSound(ALSound *snd, u8 *bankBase)
 
 static inline void preprocessALInstrument(ALInstrument *inst, u8 *bankBase)
 {
-	if ((uintptr_t)inst->soundArray[0] < 0x02000000) {
+	if ((uintptr_t)inst->soundArray[0] < 0x0500000 && inst->bendRange >= 0) {
 		// already swapped (maybe come up with a better check)
 		return;
 	}
@@ -135,7 +135,7 @@ static inline void preprocessALInstrument(ALInstrument *inst, u8 *bankBase)
 
 static inline void preprocessALBank(ALBank *bank, u8 *bankBase)
 {
-	if ((uintptr_t)bank->instArray[0] < 0x02000000) {
+	if ((uintptr_t)bank->sampleRate <= 48000) {
 		// already swapped (maybe come up with a better check)
 		return;
 	}
@@ -915,6 +915,15 @@ void preprocessALBankFile(u8 *data, u32 size)
 	}
 }
 
+void preprocessALCMidiHdr(u8 *data, u32 size)
+{
+	ALCMidiHdr *hdr = (ALCMidiHdr *)data;
+	PD_SWAP_VAL(hdr->division);
+	for (s32 i = 0; i < ARRAYCOUNT(hdr->trackOffset); ++i) {
+		PD_SWAP_VAL(hdr->trackOffset[i]);
+	}
+}
+
 void preprocessSequences(u8 *data, u32 size)
 {
 	struct seqtable *seq = (struct seqtable *)data;
diff --git a/src/lib/snd.c b/src/lib/snd.c
index 4efc893ef..1720e73cb 100644
--- a/src/lib/snd.c
+++ b/src/lib/snd.c
@@ -22,6 +22,9 @@
 #include "lib/speaker.h"
 #include "data.h"
 #include "types.h"
+#ifndef PLATFORM_N64
+#include "preprocess.h"
+#endif
 
 struct curmp3 {
 	union soundnumhack sfxref;
@@ -1628,6 +1631,9 @@ bool seqPlay(struct seqinstance *seq, s32 tracknum)
 	dmaExec(zipstart, g_SeqTable->entries[seq->tracknum].romaddr, ziplen);
 
 	ziplen = rzipInflate(zipstart, binstart, scratch);
+#ifndef PLATFORM_N64
+	preprocessALCMidiHdr(binstart, ziplen);
+#endif
 
 #if VERSION < VERSION_NTSC_1_0
 	if (ziplen == 0) {