/* 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.
 *
 */

#ifndef SCI_SOUND_DECODERS_SOL_H
#define SCI_SOUND_DECODERS_SOL_H
#include "audio/audiostream.h"
#include "common/stream.h"

namespace Sci {

enum SOLFlags {
	kCompressed = 1,
	k16Bit      = 4,
	kStereo     = 16
};

template <bool STEREO, bool S16BIT>
class SOLStream : public Audio::SeekableAudioStream {
private:
	/**
	 * Read stream containing possibly-compressed SOL audio.
	 */
	Common::DisposablePtr<Common::SeekableReadStream> _stream;

	/**
	 * Start offset of the audio data in the read stream.
	 */
	int32 _dataOffset;

	/**
	 * Sample rate of audio data.
	 */
	uint16 _sampleRate;

	/**
	 * The raw (possibly-compressed) size of audio data in
	 * the stream.
	 */
	int32 _rawDataSize;

	/**
	 * The last sample from the previous DPCM decode.
	 */
	union {
		int16 _dpcmCarry16;
		uint8 _dpcmCarry8;
	};

	/**
	 * The calculated length of the stream.
	 */
	Audio::Timestamp _length;

	virtual bool seek(const Audio::Timestamp &where) override;
	virtual Audio::Timestamp getLength() const override;
	virtual int readBuffer(int16 *buffer, const int numSamples) override;
	virtual bool isStereo() const override;
	virtual int getRate() const override;
	virtual bool endOfData() const override;
	virtual bool rewind() override;

public:
	SOLStream(Common::SeekableReadStream *stream, const DisposeAfterUse::Flag disposeAfterUse, const int32 dataOffset, const uint16 sampleRate, const int32 rawDataSize);
};

Audio::SeekableAudioStream *makeSOLStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse);

Audio::SeekableAudioStream *makeSOLStream(Common::SeekableReadStream *headerStream, Common::SeekableReadStream *dataStream, DisposeAfterUse::Flag disposeAfterUse);
}
#endif