MOHAWK: Fix endianness issue in Myst opcode 30

The previous code was reading data of the system's endianness as little endian.
Now the data is converted to little endian before it is read.

Attempt to fix #7100.

1 files changed, 7 insertions, 2 deletions

diff --git a/engines/mohawk/myst_scripts.cpp b/engines/mohawk/myst_scripts.cpp
index 04e7c5a9b7..6ad7dd088b 100644
--- a/engines/mohawk/myst_scripts.cpp
+++ b/engines/mohawk/myst_scripts.cpp
@@ -685,9 +685,14 @@ void MystScriptParser::o_changeBackgroundSound(uint16 op, uint16 var, uint16 arg
 	// Used on Channelwood Card 3225 with argc = 8 i.e. Conditional Sound List
 	debugC(kDebugScript, "Opcode %d: Process Sound Block", op);
 
-	Common::MemoryReadStream stream = Common::MemoryReadStream((const byte *) argv, argc * sizeof(uint16));
+	Common::MemoryWriteStreamDynamic writeStream = Common::MemoryWriteStreamDynamic(DisposeAfterUse::YES);
+	for (uint i = 0; i < argc; i++) {
+		writeStream.writeUint16LE(argv[i]);
+	}
+
+	Common::MemoryReadStream readStream = Common::MemoryReadStream(writeStream.getData(), writeStream.size());
 
-	MystSoundBlock soundBlock = _vm->readSoundBlock(&stream);
+	MystSoundBlock soundBlock = _vm->readSoundBlock(&readStream);
 	_vm->applySoundBlock(soundBlock);
 }