3do.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 AUDIO_3DO_SDX2_H
#define AUDIO_3DO_SDX2_H

#include "common/scummsys.h"
#include "common/types.h"
#include "common/stream.h"

#include "audio/audiostream.h"

namespace Audio {

// amount of bytes to be used within the decoder classes as buffers
#define AUDIO_3DO_CACHE_SIZE 1024

// persistent spaces
struct audio_3DO_ADP4_PersistentSpace {
    int16 lastSample;
    int16 stepIndex;
};

struct audio_3DO_SDX2_PersistentSpace {
    int16 lastSample1;
    int16 lastSample2;
};

class Audio3DO_ADP4_Stream : public RewindableAudioStream {
public:
    Audio3DO_ADP4_Stream(Common::SeekableReadStream *stream, uint16 sampleRate, bool stereo, DisposeAfterUse::Flag disposeAfterUse, audio_3DO_ADP4_PersistentSpace *persistentSpace);

protected:
    const uint16 _sampleRate;
    const bool _stereo;

    Common::DisposablePtr<Common::SeekableReadStream> _stream;
    int32 _streamBytesLeft;

    void reset();
    bool rewind();
    bool endOfData() const { return (_stream->pos() >= _stream->size()); }
    bool isStereo() const { return _stereo; }
    int getRate() const { return _sampleRate; }

    int readBuffer(int16 *buffer, const int numSamples);

    bool _initialRead;
    audio_3DO_ADP4_PersistentSpace *_callerDecoderData;
    audio_3DO_ADP4_PersistentSpace _initialDecoderData;
    audio_3DO_ADP4_PersistentSpace _curDecoderData;

private:
    int16 decodeSample(byte compressedNibble);
};

class Audio3DO_SDX2_Stream : public RewindableAudioStream {
public:
    Audio3DO_SDX2_Stream(Common::SeekableReadStream *stream, uint16 sampleRate, bool stereo, DisposeAfterUse::Flag disposeAfterUse, audio_3DO_SDX2_PersistentSpace *persistentSpacePtr);

protected:
    const uint16 _sampleRate;
    const bool _stereo;

    Common::DisposablePtr<Common::SeekableReadStream> _stream;
    int32 _streamBytesLeft;

    void reset();
    bool rewind();
    bool endOfData() const { return (_stream->pos() >= _stream->size()); }
    bool isStereo() const { return _stereo; }
    int getRate() const { return _sampleRate; }

    int readBuffer(int16 *buffer, const int numSamples);

    bool _initialRead;
    audio_3DO_SDX2_PersistentSpace *_callerDecoderData;
    audio_3DO_SDX2_PersistentSpace _initialDecoderData;
    audio_3DO_SDX2_PersistentSpace _curDecoderData;
};

RewindableAudioStream *make3DO_ADP4AudioStream(
    Common::SeekableReadStream *stream,
    uint16 sampleRate,
    bool stereo,
    uint32 *audioLengthMSecsPtr = NULL, // returns the audio length in milliseconds
    DisposeAfterUse::Flag disposeAfterUse = DisposeAfterUse::YES,
    audio_3DO_ADP4_PersistentSpace *persistentSpacePtr = NULL
);

RewindableAudioStream *make3DO_SDX2AudioStream(
    Common::SeekableReadStream *stream,
    uint16 sampleRate,
    bool stereo,
    uint32 *audioLengthMSecsPtr = NULL, // returns the audio length in milliseconds
    DisposeAfterUse::Flag disposeAfterUse = DisposeAfterUse::YES,
    audio_3DO_SDX2_PersistentSpace *persistentSpacePtr = NULL
);

} // End of namespace Audio

#endif