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audio/decoders/xan_dpcm.h

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+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * @file
+ * Sound decoder used in engines:
+ *  - ultima8 (Crusader: No Regret)
+ */
+
+#ifndef AUDIO_XAN_DPCM_H
+#define AUDIO_XAN_DPCM_H
+
+#include "common/scummsys.h"
+#include "common/types.h"
+
+namespace Common {
+class SeekableReadStream;
+}
+
+namespace Audio {
+
+class StatelessPacketizedAudioStream;
+
+/**
+ * Implements the Xan DPCM decoder used in Crusader: No Regret and Wing
+ * Commander IV movies.  Implementation based on the description on the
+ * MultiMedia Wiki:
+ * https://wiki.multimedia.cx/index.php/Xan_DPCM
+ */
+class XanDPCMStream : public StatelessPacketizedAudioStream {
+public:
+	/**
+	 * Create a Xan DPCM stream
+	 * @param rate              sampling rate (samples per second)
+	 * @param channels  	number of channels to decode
+	 * @return   a new XanDPCMStream, or NULL, if an error occurred
+	 */
+	 XanDPCMStream(int rate, int channels);
+
+protected:
+	AudioStream *makeStream(Common::SeekableReadStream *data) override;
+};
+
+
+} // End of namespace Audio
+
+#endif