text: /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL21$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see http://www.qt.io/terms-conditions. For further
  ** information use the contact form at http://www.qt.io/contact-us.
  **
  ** GNU Lesser General Public License Usage
  ** 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
  ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
  ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
  ** following information to ensure the GNU Lesser General Public License
  ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
  ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  **
  ** As a special exception, The Qt Company gives you certain additional
  ** rights. These rights are described in The Qt Company LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #ifndef MFAUDIODECODERCONTROL_H
  #define MFAUDIODECODERCONTROL_H
  
  #include "qaudiodecodercontrol.h"
  #include "mfdecodersourcereader.h"
  #include "sourceresolver.h"
  
  QT_USE_NAMESPACE
  
  class MFAudioDecoderControl : public QAudioDecoderControl
  {
      Q_OBJECT
  public:
      MFAudioDecoderControl(QObject *parent = 0);
      ~MFAudioDecoderControl();
  
      QAudioDecoder::State state() const;
  
      QString sourceFilename() const;
      void setSourceFilename(const QString &fileName);
  
      QIODevice* sourceDevice() const;
      void setSourceDevice(QIODevice *device);
  
      void start();
      void stop();
  
      QAudioFormat audioFormat() const;
      void setAudioFormat(const QAudioFormat &format);
  
      QAudioBuffer read();
      bool bufferAvailable() const;
  
      qint64 position() const;
      qint64 duration() const;
  
  private Q_SLOTS:
      void handleMediaSourceReady();
      void handleMediaSourceError(long hr);
      void handleSampleAdded();
      void handleSourceFinished();
  
  private:
      void updateResamplerOutputType();
      void activatePipeline();
      void onSourceCleared();
  
      MFDecoderSourceReader  *m_decoderSourceReader;
      SourceResolver         *m_sourceResolver;
      IMFTransform           *m_resampler;
      QAudioDecoder::State    m_state;
      QString                 m_sourceFilename;
      QIODevice              *m_device;
      QAudioFormat            m_audioFormat;
      DWORD                   m_mfInputStreamID;
      DWORD                   m_mfOutputStreamID;
      bool                    m_bufferReady;
      QAudioBuffer            m_cachedAudioBuffer;
      qint64                  m_duration;
      qint64                  m_position;
      bool                    m_loadingSource;
      IMFMediaType           *m_mfOutputType;
      IMFSample              *m_convertSample;
      QAudioFormat            m_sourceOutputFormat;
      bool                    m_sourceReady;
      bool                    m_resamplerDirty;
  };
  
  #endif//MFAUDIODECODERCONTROL_H
  