SCI: doing detectDoSoundType() properly sci0early

checking, if sound resources are sci0early or late for sci0early games instead of hardcoding lsl2

svn-id: r52514

1 files changed, 13 insertions, 0 deletions

diff --git a/engines/sci/resource.cpp b/engines/sci/resource.cpp
index 3b787cc673..4aff273610 100644
--- a/engines/sci/resource.cpp
+++ b/engines/sci/resource.cpp
@@ -2148,6 +2148,19 @@ bool ResourceManager::detectForPaletteMergingForSci11() {
 	return false;
 }
 
+// is called on SCI0EARLY games to make sure that sound resources are in fact also SCI0EARLY
+bool ResourceManager::detectEarlySound() {
+	Resource *res = findResource(ResourceId(kResourceTypeSound, 1), 0);
+	if (res) {
+		if (res->size >= 0x22) {
+			if (READ_LE_UINT16(res->data + 0x1f) == 0) // channel 15 voice count + play mask is 0 in SCI0LATE
+				if (res->data[0x21] == 0) // last byte right before actual data is 0 as well
+					return false; // these 2 bytes are 
+		}
+	}
+	return true;
+}
+
 // Functions below are based on PD code by Brian Provinciano (SCI Studio)
 bool ResourceManager::hasOldScriptHeader() {
 	Resource *res = findResource(ResourceId(kResourceTypeScript, 0), 0);