null_video_renderer.h

这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数就可以编译该代码.

/*
//
//                  INTEL CORPORATION PROPRIETARY INFORMATION
//     This software is supplied under the terms of a license agreement or
//     nondisclosure agreement with Intel Corporation and may not be copied
//     or disclosed except in accordance with the terms of that agreement.
//       Copyright(c) 2003-2005 Intel Corporation. All Rights Reserved.
//
*/

#ifndef ___NULL_VIDEO_RENDERER_H___
#define ___NULL_VIDEO_RENDERER_H___

#include "vm_semaphore.h"
#include "base_video_render.h"

namespace UMC
{

class NULLVideoRender: public BaseVideoRender
{
public:
    // Default constructor
    NULLVideoRender(void);
    // Destructor
    virtual ~NULLVideoRender(void);

    // Initialize the render, return false if failed, call Close anyway
    virtual Status Init(MediaReceiverParams* pInit);

    //  Temporary stub, will be removed in future
    virtual Status Init(VideoRenderParams& rInit)
    {   return Init(&rInit); }

    // Rendering the current frame
    virtual Status RenderFrame(void);

    // Show the last rendered frame
    //has no affect
    virtual Status ShowLastFrame(){return UMC_OK;};

    // Set/Reset full screen playback
    virtual Status SetFullScreen(ModuleContext& rContext, bool full);

    // Terminate the render
    virtual Status Close(void);

protected:

    virtual int LockSurface( unsigned char** vidmem );
    virtual int UnlockSurface( unsigned char** vidmem );

    vm_byte *m_pb;                                              // (vm_byte *) pointer to allocated video memory
    size_t m_nPitch;                                            // (size_t) pitch of video memory

};

} // namespace UMC

#endif // ___NULL_VIDEO_RENDER_H___