From be6fd784b43ba2f6c6055e939f33d198cdd8d55b Mon Sep 17 00:00:00 2001
From: Sven Hesse
Date: Sat, 23 May 2009 20:38:08 +0000
Subject: Allow for different MOD signatures

svn-id: r40827
---
 sound/mods/module.cpp | 21 ++++++++++++++++++---
 sound/mods/module.h   |  3 ++-
 2 files changed, 20 insertions(+), 4 deletions(-)

(limited to 'sound/mods')

diff --git a/sound/mods/module.cpp b/sound/mods/module.cpp
index c2a6190308..992c2a28e3 100644
--- a/sound/mods/module.cpp
+++ b/sound/mods/module.cpp
@@ -26,6 +26,7 @@
 #include "sound/mods/module.h"
 
 #include "common/util.h"
+#include "common/endian.h"
 
 namespace Modules {
 
@@ -111,6 +112,10 @@ const int16 Module::periods[16][60] = {
 	 216 , 203 , 192 , 181 , 171 , 161 , 152 , 144 , 136 , 128 , 121 , 114,
 	 108 , 101 , 96  , 90  , 85  , 80  , 76  , 72  , 68  , 64  , 60  , 57 }};
 
+const uint32 Module::signatures[] = {
+	MKID_BE('M.K.'), MKID_BE('M!K!'), MKID_BE('FLT4')
+};
+
 bool Module::load(Common::SeekableReadStream &st, int offs) {
 	if (offs) {
 		// Load the module with the common sample data
@@ -138,9 +143,19 @@ bool Module::load(Common::SeekableReadStream &st, int offs) {
 	undef = st.readByte();
 
 	st.read(songpos, 128);
-	st.read(sig, 4);
-	if (memcmp(sig, "M.K.", 4)) {
-		warning("Expected 'M.K.' in protracker module");
+
+	sig = st.readUint32BE();
+
+	bool foundSig = false;
+	for (int i = 0; i < ARRAYSIZE(signatures); i++) {
+		if (sig == signatures[i]) {
+			foundSig = true;
+			break;
+		}
+	}
+
+	if (!foundSig) {
+		warning("No known signature found in protracker module");
 		return false;
 	}
 
diff --git a/sound/mods/module.h b/sound/mods/module.h
index 0d2282f770..550b63617e 100644
--- a/sound/mods/module.h
+++ b/sound/mods/module.h
@@ -70,7 +70,7 @@ public:
 	byte songlen;
 	byte undef;
 	byte songpos[128];
-	byte sig[4];
+	uint32 sig;
 	pattern_t *pattern;
 
 	Module();
@@ -82,6 +82,7 @@ public:
 
 private:
 	static const int16 periods[16][60];
+	static const uint32 signatures[];
 };
 
 } // End of namespace Modules
-- 
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