1 files changed, 106 insertions, 0 deletions
diff --git a/sound/iff_sound.cpp b/sound/iff_sound.cpp
new file mode 100644
index 0000000000..60a1486ed5
--- /dev/null
+++ b/sound/iff_sound.cpp
@@ -0,0 +1,106 @@
+/* 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 "sound/iff_sound.h"
+#include "sound/audiostream.h"
+#include "sound/mixer.h"
+#include "common/func.h"
+
+namespace Audio {
+
+void Voice8Header::load(Common::ReadStream &stream) {
+	stream.read(this, sizeof(Voice8Header));
+	oneShotHiSamples = FROM_BE_32(oneShotHiSamples);
+	repeatHiSamples = FROM_BE_32(repeatHiSamples);
+	samplesPerHiCycle = FROM_BE_32(samplesPerHiCycle);
+	samplesPerSec = FROM_BE_16(samplesPerSec);
+	volume = FROM_BE_32(volume);
+}
+
+
+
+struct A8SVXLoader {
+	Voice8Header _header;
+	int8 *_data;
+	uint32 _dataSize;
+
+	void load(Common::ReadStream &input) {
+		Common::IFFParser parser(&input);
+		Common::Functor1Mem< Common::IFFChunk&, bool, A8SVXLoader > c(this, &A8SVXLoader::callback);
+		parser.parse(c);
+	}
+
+	bool callback(Common::IFFChunk &chunk) {
+		switch (chunk._type) {
+		case ID_VHDR:
+			_header.load(*chunk._stream);
+			break;
+
+		case ID_BODY:
+			_dataSize = chunk._size;
+			_data = (int8*)malloc(_dataSize);
+			assert(_data);
+			loadData(chunk._stream);
+			return true;
+		}
+
+		return false;
+	}
+
+	void loadData(Common::ReadStream *stream) {
+		switch (_header.compression) {
+		case 0:
+			stream->read(_data, _dataSize);
+			break;
+
+		case 1:
+			// implement other formats here
+			error("compressed IFF audio is not supported");
+			break;
+		}
+
+	}
+};
+
+
+AudioStream *make8SVXStream(Common::ReadStream &input, bool loop) {
+	A8SVXLoader loader;
+	loader.load(input);
+
+	uint32 loopStart = 0, loopEnd = 0, flags = 0;
+	if (loop) {
+		// the standard way to loop 8SVX audio implies use of the oneShotHiSamples and
+		// repeatHiSamples fields
+		loopStart = 0;
+		loopEnd = loader._header.oneShotHiSamples + loader._header.repeatHiSamples;
+		flags |= Audio::Mixer::FLAG_LOOP;
+	}
+
+	flags |= Audio::Mixer::FLAG_AUTOFREE;
+
+	return Audio::makeLinearInputStream((byte *)loader._data, loader._dataSize, loader._header.samplesPerSec, flags, loopStart, loopEnd);
+}
+
+}