From 79e005d85e7dfe09a9c7402e67eaa1148ccbb470 Mon Sep 17 00:00:00 2001
From: Ty Lamontagne <amfobes@gmail.com>
Date: Tue, 26 Nov 2024 16:53:12 -0500
Subject: [PATCH] CDVD: Byte swap hack. CHD CD audio with OSDSYS is working

---
 pcsx2/CDVD/InputIsoFile.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pcsx2/CDVD/InputIsoFile.cpp b/pcsx2/CDVD/InputIsoFile.cpp
index 5240925bb17b6..aa29e0f54d658 100644
--- a/pcsx2/CDVD/InputIsoFile.cpp
+++ b/pcsx2/CDVD/InputIsoFile.cpp
@@ -160,6 +160,15 @@ int InputIsoFile::FinishRead3(u8* dst, uint mode)
 		dst[diff - 9] = 2;
 	}
 
+	// why do we need to byte swap here ?!
+	if (m_type == ISOTYPE_AUDIO && mode == CDVD_MODE_2352)
+	{
+		for (int i = 0; i < 2352; i += 2)
+		{
+			std::swap(dst[diff + i], dst[diff + i + 1]);
+		}
+	}
+
 	return 0;
 }