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engines/ultima/ultima8/audio/sonarc_audio_sample.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/>.
+ *
+ */
+
+#ifndef ULTIMA8_AUDIO_SONARCAUDIOSAMPLE_H
+#define ULTIMA8_AUDIO_SONARCAUDIOSAMPLE_H
+
+#include "ultima/ultima8/audio/audio_sample.h"
+
+namespace Ultima {
+namespace Ultima8 {
+
+class SonarcAudioSample : public AudioSample {
+	struct SonarcDecompData {
+		uint32      _pos;
+		uint32      _samplePos;
+	};
+
+	static bool _generatedOneTable;
+	static int  _oneTable[256];
+
+	static void GenerateOneTable();
+
+	static void decode_EC(int mode, int samplecount,
+						  const uint8 *source, int sourcesize,
+						  uint8 *dest);
+	static void decode_LPC(int order, int nsamples,
+						   uint8 *dest, const uint8 *factors);
+	static int audio_decode(const uint8 *source, uint8 *dest);
+
+	int _frameSize;
+	uint32 _srcOffset;
+
+public:
+	SonarcAudioSample(const uint8 *buffer, uint32 size);
+	~SonarcAudioSample(void) override;
+
+	Audio::SeekableAudioStream *makeStream() const override;
+
+private:
+	uint32 decompressFrame(SonarcDecompData *decompData, uint8 *samples) const;
+};
+
+} // End of namespace Ultima8
+} // End of namespace Ultima
+
+#endif