sef/audio.h

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//  This file is part of SilentEye.
//
//  SilentEye 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.
//
//  SilentEye 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 SilentEye. If not, see <http://www.gnu.org/licenses/>.

#ifndef AUDIO_H_
#define AUDIO_H_

#include "media.h"

#include <QString>
#include <QtMultimedia/QAudioFormat>

namespace SilentEyeFramework {

    class Audio : public Media
    {
    protected:
        QAudioFormat m_format;

        // Chunk description
        quint32 m_totalSize;
        // Sub chunk format
        quint32 m_subFmtSize;
        quint16 m_audioFormat;
        quint16 m_numChannels;
        quint32 m_sampleRate;
        quint32 m_byteRate;
        quint16 m_blockAlign;
        quint16 m_bitPerSample;
        // Sub chunk data
        quint32 m_subDataSize;
        QAudioFormat::Endian m_byteOrder;

        double m_duration;
        quint32 m_bitRate;

    private:
        QFile m_file;
        QDataStream m_sampleStream;

    public:
        Audio(const QString& filepath);
        Audio(const Audio&);
        Audio(Audio*);
        ~Audio();

        virtual double duration();
        virtual quint32 bitRate();
        virtual QAudioFormat format() const;

        static int headerLength() { return 44; }

    protected:
        bool openSamples();
        bool hasNextSample();
        QList<quint32> readSample();
        void skipSample(qint32);
        bool closeSamples();
        qint32 sampleSize() const;

        void readWaveHeader();
        void writeWaveHeader(QDataStream&);
    };

}

#endif