Implemented a IFF (Interchange File Format) parser and added subclasses to parse graphics (ILBM, PBM) and audio (8SVX), thus replacing old decoding routines. SAGA and Parallaction have been adjusted to work with the new code.

svn-id: r26719

1 files changed, 73 insertions, 0 deletions

diff --git a/sound/iff.h b/sound/iff.h
new file mode 100644
index 0000000000..592cf9c2f0
--- /dev/null
+++ b/sound/iff.h
@@ -0,0 +1,73 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2001-2006 The ScummVM project
+ *
+ * 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 SOUND_IFF_H
+#define SOUND_IFF_H
+
+#include "common/iff_container.h"
+
+namespace Audio {
+
+struct Voice8Header {
+	uint32	oneShotHiSamples;
+	uint32	repeatHiSamples;
+	uint32	samplesPerHiCycle;
+	uint16	samplesPerSec;
+	byte	octaves;
+	byte	compression;
+	uint32	volume;
+
+	Voice8Header() {
+		memset(this, 0, sizeof(Voice8Header));
+	}
+};
+
+
+/*
+	A8SVX decoder reads 8SVX subtype of IFF files.
+
+	TODO: make a factory function for this kind of stream?
+ */
+class A8SVXDecoder : public Common::IFFParser {
+
+protected:
+	Voice8Header  	&_header;
+	byte* 			&_data;
+	uint32			&_dataSize;
+
+protected:
+	void readVHDR(Common::IFFChunk &chunk);
+	void readBODY(Common::IFFChunk &chunk);
+
+public:
+	A8SVXDecoder(Common::ReadStream &input, Voice8Header &header, byte *&data, uint32 &dataSize);
+	void decode();
+};
+
+
+/*
+	TODO: Implement a parser for AIFF subtype.
+ */
+
+}
+
+#endif