snd.h

/* 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 LASTEXPRESS_SND_H
#define LASTEXPRESS_SND_H

/*
    Sound format (.SND / .LNK)

    uint32 {4}   - data size
    uint16 {2}   - number of blocks

    // for each block
        int16 {2}    - initial sample
        byte {1}     - initial index
        byte {1}     - unused (00)
        byte {x}     - IMA ADPCM sample codes
*/

#include "audio/mixer.h"

namespace Audio {
class AudioStream;
class QueuingAudioStream;
}

namespace Common {
class SeekableReadStream;
}

namespace LastExpress {

class LastExpress_ADPCMStream;

class SimpleSound {
public:
    SimpleSound();
    virtual ~SimpleSound();

    void stop() const;
    virtual bool isFinished() = 0;

    uint32 getTimeMS();

protected:
    void loadHeader(Common::SeekableReadStream *in);
    LastExpress_ADPCMStream *makeDecoder(Common::SeekableReadStream *in, uint32 size, uint32 volume, bool looped) const;
    void play(Audio::AudioStream *as, DisposeAfterUse::Flag autofreeStream);

    uint32 _size;   
    uint16 _blocks; 
    uint32 _blockSize;
    Audio::SoundHandle _handle;
};

class StreamedSound : public SimpleSound {
public:
    StreamedSound();
    ~StreamedSound() override;

    bool load(Common::SeekableReadStream *stream, uint32 volume, bool looped, uint32 startBlock = 0);
    bool isFinished() override;

    void setVolume(uint32 newVolume);
    void setVolumeSmoothly(uint32 newVolume);

private:
    LastExpress_ADPCMStream *_as;
    bool _loaded;
};

class AppendableSound : public SimpleSound {
public:
    AppendableSound();
    ~AppendableSound() override;

    void queueBuffer(const byte *data, uint32 size);
    void queueBuffer(Common::SeekableReadStream *bufferIn);
    void finish();

    bool isFinished() override;

private:
    Audio::QueuingAudioStream *_as;
    bool _finished;
};

} // End of namespace LastExpress

#endif // LASTEXPRESS_SND_H