SCI: Fix bug #3037401 - LB2Floppy: No SFX

Laura Bow 2 floppy and Mixed-Up Mother Goose SCI1.1 use an 8-byte entry 0.map format to store their entries.

svn-id: r51646

1 files changed, 39 insertions, 0 deletions

diff --git a/engines/sci/resource_audio.cpp b/engines/sci/resource_audio.cpp
index 08e05f5ccd..2c7a63b363 100644
--- a/engines/sci/resource_audio.cpp
+++ b/engines/sci/resource_audio.cpp
@@ -235,6 +235,20 @@ void ResourceManager::removeAudioResource(ResourceId resId) {
 // w nEntry
 // tb offset (cumulative)
 
+// QFG3 Demo 0.MAP structure:
+// =========
+// 10-byte entries:
+// w nEntry
+// dw offset
+// dw size
+
+// LB2 Floppy/Mother Goose SCI1.1 0.MAP structure:
+// =========
+// 8-byte entries:
+// w nEntry
+// w 0xffff
+// dw offset
+
 // Early SCI1.1 MAP structure:
 // ===============
 // 10-byte entries:
@@ -318,6 +332,31 @@ int ResourceManager::readAudioMapSCI11(ResourceSource *map) {
 
 			addResource(ResourceId(kResourceTypeAudio, n), src, offset, size);
 		}
+	} else if (map->_volumeNumber == 0 && entrySize == 8 && READ_LE_UINT16(ptr + 2) == 0xffff) {
+		// LB2 Floppy/Mother Goose SCI1.1 format
+		Common::SeekableReadStream *stream = getVolumeFile(src);
+
+		while (ptr < mapRes->data + mapRes->size) {
+			uint16 n = READ_LE_UINT16(ptr);
+			ptr += 4;
+
+			if (n == 0xffff)
+				break;
+
+			offset = READ_LE_UINT32(ptr);
+			ptr += 4;
+
+			// The size is not stored in the map and the entries have no order.
+			// We need to dig into the audio resource in the volume to get the size.
+			stream->seek(offset + 1);
+			byte headerSize = stream->readByte();
+			assert(headerSize == 11 || headerSize == 12);
+			
+			stream->skip(5);
+			uint32 size = stream->readUint32LE() + headerSize + 2;
+
+			addResource(ResourceId(kResourceTypeAudio, n), src, offset, size);
+		}
 	} else {
 		bool isEarly = (entrySize != 11);