text: /*
   * Copyright (C) 2007, 2008, 2009, 2010 Apple, Inc.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
   */
  
  #ifndef QTMovieVisualContext_h
  #define QTMovieVisualContext_h
  
  #ifdef QTMOVIEWIN_EXPORTS
  #define QTMOVIEWIN_API __declspec(dllexport)
  #else
  #define QTMOVIEWIN_API __declspec(dllimport)
  #endif
  
  #include "QTMovie.h"
  #include "QTMovieTask.h"
  #include "QTPixelBuffer.h"
  #include <wtf/OwnPtr.h>
  #include <wtf/RefCounted.h>
  
  typedef const struct __CFDictionary* CFDictionaryRef;
  typedef struct OpaqueQTVisualContext*   QTVisualContextRef;
  
  // QTCVTimeStamp is a struct containing only a CVTimeStamp.  This is to 
  // work around the inability of CVTimeStamp to be forward declared, in 
  // addition to it being declared in different header files when building
  // the QTMovieWin and WebCore projects.
  struct QTCVTimeStamp;
  
  class QTMovieVisualContextClient {
  public:
      virtual void imageAvailableForTime(const QTCVTimeStamp*) = 0;
  };
  
  class QTMOVIEWIN_API QTMovieVisualContext : public RefCounted<QTMovieVisualContext> {
  public:
      static PassRefPtr<QTMovieVisualContext> create(QTMovieVisualContextClient*, QTPixelBuffer::Type);
      ~QTMovieVisualContext();
  
      bool isImageAvailableForTime(const QTCVTimeStamp*) const;
      QTPixelBuffer imageForTime(const QTCVTimeStamp*);
      void task();
  
      QTVisualContextRef visualContextRef();
  
      void setMovie(PassRefPtr<QTMovie>);
      QTMovie* movie() const;
  
      static double currentHostTime();
  
  protected:
      QTMovieVisualContext(QTMovieVisualContextClient*, QTPixelBuffer::Type);
      void setupVisualContext();
  
      friend class QTMovieVisualContextPriv;
      OwnPtr<QTMovieVisualContextPriv> m_private;
  };
  
  #endif
  