Initial import of the work in progress MADE engine

svn-id: r31599

1 files changed, 131 insertions, 0 deletions

diff --git a/engines/made/sound.cpp b/engines/made/sound.cpp
new file mode 100644
index 0000000000..520239135d
--- /dev/null
+++ b/engines/made/sound.cpp
@@ -0,0 +1,131 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/endian.h"
+#include "common/util.h"
+
+#include "made/sound.h"
+
+namespace Made {
+
+void decompressSound(byte *source, byte *dest, uint16 chunkSize, uint16 chunkCount) {
+
+	int16 prevSample = 0;
+	byte soundBuffer[1025];
+	byte soundBuffer3[1024];
+	int16 soundBuffer2[16];
+
+	while (chunkCount--) {
+
+        byte deltaType = (*source) >> 6;
+
+		uint16 workChunkSize = chunkSize;
+        if (deltaType == 1)
+            workChunkSize /= 2;
+		else if (deltaType == 2)
+		    workChunkSize /= 4;
+
+		byte type = (*source++) & 0x0F;
+		
+		int16 workSample = prevSample;
+
+		switch (type) {
+
+		case 0:
+		    memset(soundBuffer, 0x80, workChunkSize);
+		    workSample = 0;
+		    break;
+
+		case 1:
+		    break;
+
+		case 2:
+		case 3:
+		case 4:
+		{
+
+		    const int modeValues[3][4] = {
+		    	{ 2, 8, 0x01, 1},
+		    	{ 4, 4, 0x03, 2},
+		    	{16, 2, 0x0F, 4}
+			};
+
+			uint16 byteCount = modeValues[type - 2][0];
+			uint16 bitCount = modeValues[type - 2][1];
+			byte bitMask = modeValues[type - 2][2];
+			byte bitShift = modeValues[type - 2][3];
+
+			uint16 ofs = 0;
+
+		    for (uint16 i = 0; i < byteCount; i++)
+		        soundBuffer2[i] = (*source++) * 2 - 128;
+
+			while (ofs < workChunkSize) {
+            	byte val = *source++;
+				for (uint i = 0; i < bitCount; i++) {
+			    	workSample = CLIP<int16>(workSample + soundBuffer2[val & bitMask], -127, 127);
+			    	val >>= bitShift;
+			    	soundBuffer[ofs++] = workSample + 128;
+				}
+			}
+
+		    break;
+		}
+
+		case 5:
+		{
+		    for (uint16 i = 0; i < workChunkSize; i++)
+		        soundBuffer[i] = *source++;
+            workSample = soundBuffer[workChunkSize - 1] - 128;
+		    break;
+		}
+
+		default:
+      		return;
+
+		}
+
+		if (deltaType == 1) {
+		    for (uint16 i = 0; i < chunkSize - 1; i += 2) {
+		        uint16 l = i / 2;
+		        soundBuffer3[i] = soundBuffer[l];
+		        soundBuffer3[i + 1] = (soundBuffer[l + 1] + soundBuffer[l]) / 2;
+			}
+			for (uint16 i = 0; i < chunkSize; i++) {
+				soundBuffer[i] = soundBuffer3[i];
+			}
+		} else if (deltaType == 2) {
+			debug(2, "****************************************");
+		}
+
+        prevSample = workSample;
+        memcpy(dest, soundBuffer, chunkSize);
+        dest += chunkSize;
+
+	}
+
+}
+
+} // End of namespace Made