base_video_render.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 ___BASE_VIDEO_RENDER_H___
#define ___BASE_VIDEO_RENDER_H___

#define MAX_FRAME_BUFFERS 8
#define MIN_FRAME_BUFFERS 4

#include "vm_debug.h"
#include "umc_mutex.h"
#include "umc_semaphore.h"
#include "umc_video_render.h"

namespace UMC
{

class BaseVideoRender : public VideoRender
{
public:
    // Default constructor
    BaseVideoRender();

    // Destructor
    virtual ~BaseVideoRender();

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

    // Release all receiver resources
    virtual Status Close();

    // Lock input buffer
    virtual Status LockInputBuffer(MediaData *in);

    // Unlock input buffer
    virtual Status UnLockInputBuffer(MediaData *in,
                                        Status StreamStatus = UMC_OK);
    // Break waiting(s)
    virtual Status Stop();

    // Warning:
    // Outdated functions - don't use it, use MediaReceiver interface instead

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

    // Reserve a frame buffer for decoding the current frame
    virtual int ReserveBuffer(unsigned char** ppucVidMem);

    // Buffer the decoded frame
    virtual Status BufferReserved(double frame_time, FrameType frame_type);

    virtual void BufferEndOfClip();


    // VideoRender interface extension above MediaReceiver

    // Peek presentation of next frame, return presentation time
    virtual double GetRenderFrame();

    // Resize the display rectangular
    virtual Status ResizeDisplay(UMC::RECT &disp, UMC::RECT &range);

    // Show/Hide Surface
    virtual void ShowSurface();

    virtual void HideSurface();

    virtual Status Reset();

protected:

    Status ResizeSource();
    struct sFrameBuffer
    {
        double    frame_time;
        FrameType frame_type;
        void     *surface;
    };

    sFrameBuffer m_Buffers[MAX_FRAME_BUFFERS];

    Semaphore    m_hDoneBufSema;
    Semaphore    m_hFreeBufSema;
    Mutex        m_SuncMut;

    volatile int m_hFreeBufSemaCount;

    int          m_iBuffersNum;
    int          m_iReadIndex;
    int          m_iWriteIndex;
    bool         m_bPrevIp;
    ClipInfo     m_SrcInfo;
    bool         m_bShow;
    UMC::RECT    m_src_rect;
    UMC::RECT    m_dst_rect;
    UMC::RECT     m_disp;
    UMC::RECT     m_range;
    bool         m_bReorder;
    bool         m_bStop;

    bool        m_bPrepareForReposition;

};

} // namespace UMC

#endif // ___BASE_VIDEO_RENDER_H___