umc_mjpeg_video_decoder.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 __UMC_MJPEG_VIDEO_DECODER_H
#define __UMC_MJPEG_VIDEO_DECODER_H

#include "ippdefs.h"
#include "ippcore.h"
#include "ipps.h"
#include "ippi.h"
#include "ippj.h"
#include "umc_structures.h"
#include "umc_video_decoder.h"
#include "umc_base_color_space_converter.h"
#include "decoder.h"




namespace UMC
{


class MJPEGVideoDecoder : public VideoDecoder
{
public:
    // Default constructor
    MJPEGVideoDecoder(void);

    // Destructor
    virtual ~MJPEGVideoDecoder(void);

    // Initialize for subsequent frame decoding.
    virtual Status Init(BaseCodecParams* init);

    // Reset decoder to initial state
    virtual Status Reset(void);

    // Close decoding & free all allocated resources
    virtual Status Close(void);

    // Get next frame
    virtual Status GetFrame(MediaData* in, MediaData* out);

    // Get information, valid after initialization
    virtual Status GetInfo(BaseCodecParams* ininfo);

    // reset skip frame counter
    Status  ResetSkipCount(void);

    // increment skip frame counter
    Status  SkipVideoFrame(int);

    // get skip frame counter statistic
    vm_var32 GetSkipedFrame(void);

protected:

    Status _GetFrameInfo(Ipp8u* pBitStream,int nSize);
    Status _DecodeField(Ipp8u* pBitStream,int nSize,int* cnt);

    bool                    m_IsInit;
    bool                    m_firstFrame;
    bool                    m_firstField;
    bool                    m_interleaved;
    int                     m_skipped_fr;
    VideoDecoderParams      m_DecoderParams;
    ColorConversionParams   m_ConvertParams;
    int                     m_frameNo;
    Ipp8u*                  m_frame;
    IppiSize                m_frameDims;
    int                     m_frameStep;
    int                     m_frameChannels;
    int                     m_framePrecision;
    ColorFormat             m_frameColor;
    int                     m_fieldStep;
    double                  m_dec_time;
    CJPEGDecoder            m_dec;
};

} // end namespace UMC

#endif //__UMC_MJPEG_VIDEO_DECODER_H