/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtMultimedia module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
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** accordance with the commercial license agreement provided with the
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
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** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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****************************************************************************/

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#ifndef QAUDIOOUTPUTWIN_H
#define QAUDIOOUTPUTWIN_H

#include <windows.h>
#include <mmsystem.h>

#include <QtCore/qdebug.h>
#include <QtCore/qtimer.h>
#include <QtCore/qstring.h>
#include <QtCore/qstringlist.h>
#include <QtCore/qdatetime.h>
#include <QtCore/qmutex.h>

#include <QtMultimedia/qaudio.h>
#include <QtMultimedia/qaudiodeviceinfo.h>
#include <QtMultimedia/qaudioengine.h>


QT_BEGIN_NAMESPACE

class QAudioOutputPrivate : public QAbstractAudioOutput
{
    Q_OBJECT
public:
    QAudioOutputPrivate(const QByteArray &device, const QAudioFormat& audioFormat);
    ~QAudioOutputPrivate();

    qint64 write( const char *data, qint64 len );

    QAudioFormat format() const;
    QIODevice* start(QIODevice* device = 0);
    void stop();
    void reset();
    void suspend();
    void resume();
    int bytesFree() const;
    int periodSize() const;
    void setBufferSize(int value);
    int bufferSize() const;
    void setNotifyInterval(int milliSeconds);
    int notifyInterval() const;
    qint64 processedUSecs() const;
    qint64 elapsedUSecs() const;
    QAudio::Error error() const;
    QAudio::State state() const;

    QIODevice* audioSource;
    QAudioFormat settings;
    QAudio::Error errorState;
    QAudio::State deviceState;

private slots:
    void feedback();
    bool deviceReady();

private:
    QByteArray m_device;
    bool resuming;
    int bytesAvailable;
    QTime timeStamp;
    qint64 elapsedTimeOffset;
    QTime timeStampOpened;
    qint32 buffer_size;
    qint32 period_size;
    qint64 totalTimeValue;
    bool pullMode;
    int intervalTime;
    static void QT_WIN_CALLBACK waveOutProc( HWAVEOUT hWaveOut, UINT uMsg,
            DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2 );

    QMutex mutex;

    WAVEHDR* allocateBlocks(int size, int count);
    void freeBlocks(WAVEHDR* blockArray);
    bool open();
    void close();

    WAVEFORMATEX wfx;
    HWAVEOUT hWaveOut;
    MMRESULT result;
    WAVEHDR header;
    WAVEHDR* waveBlocks;
    volatile bool finished;
    volatile int waveFreeBlockCount;
    int waveCurrentBlock;
    char* audioBuffer;
};

class OutputPrivate : public QIODevice
{
    Q_OBJECT
public:
    OutputPrivate(QAudioOutputPrivate* audio);
    ~OutputPrivate();

    qint64 readData( char* data, qint64 len);
    qint64 writeData(const char* data, qint64 len);

private:
    QAudioOutputPrivate *audioDevice;
};

QT_END_NAMESPACE

#endif
