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  #ifndef QAUDIOBUFFER_P_H
  #define QAUDIOBUFFER_P_H
  
  //
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt API.  It exists purely as an
  // implementation detail.  This header file may change from version to
  // version without notice, or even be removed.
  //
  // We mean it.
  //
  
  #include <qtmultimediadefs.h>
  #include <qmultimedia.h>
  
  #include "qaudioformat.h"
  
  QT_BEGIN_NAMESPACE
  
  // Required for QDoc workaround
  class QString;
  
  class Q_MULTIMEDIA_EXPORT QAbstractAudioBuffer {
  public:
      virtual ~QAbstractAudioBuffer() {}
  
      // Lifetime management
      virtual void release() = 0;
  
      // Format related
      virtual QAudioFormat format() const = 0;
      virtual qint64 startTime() const = 0;
      virtual int frameCount() const = 0;
  
      // R/O Data
      virtual void *constData() const = 0;
  
      // For writable data we do this:
      // If we only have one reference to the provider,
      // call writableData().  If that does not return 0,
      // then we're finished.  If it does return 0, then we call
      // writableClone() to get a new buffer and then release
      // the old clone if that succeeds.  If it fails, we create
      // a memory clone from the constData and release the old buffer.
      // If writableClone() succeeds, we then call writableData() on it
      // and that should be good.
  
      virtual void *writableData() = 0;
      virtual QAbstractAudioBuffer *clone() const = 0;
  };
  
  
  QT_END_NAMESPACE
  
  #endif // QAUDIOBUFFER_P_H
  