EmbedSoundInst.h

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// EmbedSoundInst.h - instance of an embedded sound, for gnash
// 
//   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
//   Free Software Foundation, Inc
// 
// 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, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

#ifndef SOUND_EMBEDSOUNDINST_H
#define SOUND_EMBEDSOUNDINST_H

#include <memory>
#include <cassert>
#include <boost/cstdint.hpp> // For C99 int types

#include "LiveSound.h"
#include "AudioDecoder.h" 
#include "SoundEnvelope.h" 
#include "EmbedSound.h" 
#include "sound_handler.h" 

// Forward declarations
namespace gnash {
    namespace sound {
        class EmbedSound;
    }
    namespace media {
        class MediaHandler;
    }
}

namespace gnash {
namespace sound {

class EmbedSoundInst : public LiveSound
{
public:

    //
    EmbedSoundInst(EmbedSound& def, media::MediaHandler& mh,
            unsigned int inPoint, unsigned int outPoint,
            const SoundEnvelopes* envelopes, int loopCount);

    // See dox in sound_handler.h (InputStream)
    virtual bool eof() const;

    //
    virtual ~EmbedSoundInst();

private:

    virtual size_t checkEarlierEnd(size_t bytesAhead, size_t pos) const {
        if (_outPoint < std::numeric_limits<unsigned long>::max()) {
            const size_t toCustomEnd = _outPoint - pos;
            return std::min(toCustomEnd, bytesAhead);
        }
        return bytesAhead;
    }

    virtual bool moreData();

    //
    void applyEnvelopes(boost::int16_t* samples, unsigned int nSamples,
            unsigned int firstSampleNum, const SoundEnvelopes& env);

    bool reachedCustomEnd() const;

    virtual bool decodingCompleted() const {
        return (decodingPosition >= _soundDef.size());
    }

    //
    virtual void decodeNextBlock();

    unsigned long decodingPosition;

    long loopCount;

    const unsigned long _outPoint;

    const SoundEnvelopes* envelopes;

    boost::uint32_t current_env;

    //
    EmbedSound& _soundDef;

};


} // gnash.sound namespace 
} // namespace gnash

#endif // SOUND_EMBEDSOUNDINST_H