Add Mohawk engine code. Part 1/3: main code.

svn-id: r46727

1 files changed, 80 insertions, 0 deletions

diff --git a/engines/mohawk/video/cinepak.h b/engines/mohawk/video/cinepak.h
new file mode 100644
index 0000000000..a94d879bdb
--- /dev/null
+++ b/engines/mohawk/video/cinepak.h
@@ -0,0 +1,80 @@
+/* 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef CINEPAK_H
+#define CINEPAK_H
+
+#include "common/scummsys.h"
+#include "common/stream.h"
+#include "common/rect.h"
+#include "graphics/surface.h"
+#include "graphics/pixelformat.h"
+
+#include "graphics/video/codecs/codec.h"
+
+namespace Mohawk {
+
+struct CinepakCodebook {
+	byte y[4];
+	byte u, v;
+};
+
+struct CinepakStrip {
+	uint16 id;
+	uint16 length;
+	Common::Rect rect;
+	CinepakCodebook v1_codebook[256], v4_codebook[256];
+};
+
+struct CinepakFrame {
+	byte flags;
+	uint32 length;
+	uint16 width;
+	uint16 height;
+	uint16 stripCount;
+	CinepakStrip *strips;
+	
+	Graphics::Surface *surface;
+};
+
+class CinepakDecoder : public Graphics::Codec {
+public:
+	CinepakDecoder();
+	~CinepakDecoder();
+
+	Graphics::Surface *decodeImage(Common::SeekableReadStream *stream);
+
+private:
+	CinepakFrame _curFrame;
+	int32 _y;
+	Graphics::PixelFormat _pixelFormat;
+	
+	void loadCodebook(Common::SeekableReadStream *stream, uint16 strip, byte codebookType, byte chunkID, uint32 chunkSize);
+	void decodeVectors(Common::SeekableReadStream *stream, uint16 strip, byte chunkID, uint32 chunkSize);
+};
+
+}
+
+#endif