umc_mpeg2_dec_base.h

audio-video-codecs.rar语音编解码器

/*//////////////////////////////////////////////////////////////////////////////
//
//                  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) 2003-2007 Intel Corporation. All Rights Reserved.
//
*/
//  MPEG-2 is a international standard promoted by ISO/IEC and
//  other organizations. Implementations of this standard, or the standard
//  enabled platforms may require licenses from various entities, including
//  Intel Corporation.

#include "umc_defs.h"
#if defined (UMC_ENABLE_MPEG2_VIDEO_DECODER)

#ifndef __UMC_MPEG2_DEC_BASE_H
#define __UMC_MPEG2_DEC_BASE_H

//IPP headers
#include "ipps.h"
#include "ippi.h"
#include "ippvc.h"
//VM headers
#include "vm_debug.h"
#include "vm_thread.h"
#include "vm_event.h"
//UMC headers
#include "umc_structures.h"
#include "umc_video_decoder.h"
#include "umc_cyclic_buffer.h"
//MPEG-2
#include "umc_mpeg2_dec_bstream.h"
#include "umc_mpeg2_dec_defs.h"
#include "umc_mpeg2_dec.h"


#define MPEG2_VIRTUAL

namespace UMC
{

    class MPEG2VideoDecoderBase : public VideoDecoder
    {
    public:
        ///////////////////////////////////////////////////////
        /////////////High Level public interface///////////////
        ///////////////////////////////////////////////////////
        // Default constructor
        MPEG2VideoDecoderBase(void);

        // Default destructor
        MPEG2_VIRTUAL ~MPEG2VideoDecoderBase(void);

        // Initialize for subsequent frame decoding.
        MPEG2_VIRTUAL Status Init(BaseCodecParams *init);

        // Get next frame
        MPEG2_VIRTUAL Status GetFrame(MediaData* in, MediaData* out);

        // Close  decoding & free all allocated resources
        MPEG2_VIRTUAL Status Close(void);

        // Reset decoder to initial state
        MPEG2_VIRTUAL Status Reset(void);

        // Get video stream information, valid after initialization
        MPEG2_VIRTUAL Status GetInfo(BaseCodecParams* info);

        Status          GetPerformance(Ipp64f *perf);

        //reset skip frame counter
        Status          ResetSkipCount();

        // increment skip frame counter
        Status          SkipVideoFrame(Ipp32s);

        // get skip frame counter statistic
        Ipp32u          GetNumOfSkippedFrames();

        //access to the latest decoded frame
        Status PreviewLastFrame(VideoData *out, BaseCodec *pPostProcessing = NULL);

        // returns closed capture data from gop user data
        MPEG2_VIRTUAL Status GetUserData(MediaData* pCC);

        MPEG2_VIRTUAL Status  SetParams(BaseCodecParams* params);


    protected:

        Status          UpdateFrameBuffer(void);
        Status          PrepareBuffer(MediaData* data);
        Status          FlushBuffer(MediaData* data, bool);
        Status          LockBuffers();    // Lock buffers
        Status          UnlockBuffers();  // Unlock buffers

        bool            AdjustSpeed(Ipp32s nframe);
        bool            AdjustSpeed(Ipp64f delta);
        Ipp32s          DecreaseSpeed(Ipp64f delta);
        Ipp32s          IncreaseSpeed(Ipp64f delta);
        Ipp32s          IncreaseSpeedN (Ipp32s numoffr);

        bool            m_bNoBframes;
        bool            m_bNoPframes;

        Ipp64f          m_dPlaybackRate;

    protected:
        //The purpose of protected interface to have controlled
        //code in derived UMC MPEG2 decoder classes

        ///////////////////////////////////////////////////////
        /////////////Level 1 protected interface///////////////
        ///////////////////////////////////////////////////////
        //Level 1 can call level 2 functions or re-implement it

        // Decode next frame
        Status DecodeFrame(IppVideoContext  *video,
                           Ipp64f           currentTime,
                           MediaData        *output);

        //Sequence Header search. Stops after header start code
        Status FindSequenceHeader(IppVideoContext *video);

        //Sequence Header decode
        MPEG2_VIRTUAL Status DecodeSequenceHeader(IppVideoContext *video);

        //Picture Header decode and picture
        MPEG2_VIRTUAL Status DecodePicture();

        // Is current picture to be skipped
        bool IsPictureToSkip();

        ///////////////////////////////////////////////////////
        /////////////Level 2 protected interface///////////////
        ///////////////////////////////////////////////////////
        //Level 2 can call level 3 functions or re-implement it

        //Picture Header decode
        MPEG2_VIRTUAL Status DecodePictureHeader();
        MPEG2_VIRTUAL Status FindSliceStartCode();

        MPEG2_VIRTUAL Status DecodeSlices(Ipp32s threadID);

        //Slice decode, includes MB decode
        MPEG2_VIRTUAL Status DecodeSlice(IppVideoContext *video);

        // decode all headers but slice, starts right after startcode
        MPEG2_VIRTUAL Status DecodeHeader(Ipp32s startcode, IppVideoContext *video);

        ///////////////////////////////////////////////////////
        /////////////Level 3 protected interface///////////////
        ///////////////////////////////////////////////////////
        //Level 3 can call level 4 functions or re-implement it

        //Slice Header decode
        MPEG2_VIRTUAL Status DecodeSliceHeader(IppVideoContext *video);

        ///////////////////////////////////////////////////////
        /////////////Level 4 protected interface///////////////
        ///////////////////////////////////////////////////////
        //Level 4 is the lowest level chunk of code
        //can be used as is for basic codec to implement standard
        //or overloaded for special purposes like HWMC, smart decode

        MPEG2_VIRTUAL Status DecodeSlice_MPEG1(IppVideoContext *video);

 protected:
        SampleBuffer*             m_pCCData;
        MediaData                 m_ccCurrData;
        sSequenceHeader           sequenceHeader;

        sPictureHeader            PictureHeader;

        mp2_VLCTable              vlcMBAdressing;
        mp2_VLCTable              vlcMBType[3];
        mp2_VLCTable              vlcMBPattern;
        mp2_VLCTable              vlcMotionVector;

        sFrameBuffer              frame_buffer;

        IppVideoContext**         Video;

        Ipp32u                    m_lFlags;

        Ipp32s                    m_decodedFrameNum;

        Ipp32s                    m_nNumberOfThreads;
        Ipp32s                    m_nNumberOfAllocatedThreads;
        vm_event*                 m_lpQuit;
        vm_event*                 m_lpStopEvent;
        vm_event*                 m_lpStartEvent;
        vm_thread*                m_lpThreads;

        class THREAD_ID
        {
        public:
            Ipp32u                m_nNumber;
            void*                 m_lpOwner;
        };

        THREAD_ID*                 m_lpThreadsID;

        Status                  ThreadingSetup(Ipp32s maxThreads);
        static  Ipp32u          VM_THREAD_CALLCONVENTION ThreadWorkingRoutine(void *lpv);

        Status                  SaveFrame(Ipp32s index, Ipp64f dTime, MediaData* output);
        bool                    DeleteTables();
        bool                    InitTables();

        MPEG2_VIRTUAL void      CalculateFrameTime(Ipp64f in_time, Ipp64f * out_time);

        Status                  DecodeSlice_FrameI_420(IppVideoContext *video);
        Status                  DecodeSlice_FrameI_422(IppVideoContext *video);
        Status                  DecodeSlice_FramePB_420(IppVideoContext *video);
        Status                  DecodeSlice_FramePB_422(IppVideoContext *video);
        Status                  DecodeSlice_FieldPB_420(IppVideoContext *video);
        Status                  DecodeSlice_FieldPB_422(IppVideoContext *video);

        Status                  mv_decode(Ipp32s r, Ipp32s s, IppVideoContext *video);
        Status                  mv_decode_dp(IppVideoContext *video);
        Status                  update_mv(Ipp16s *pval, Ipp32s s, IppVideoContext *video);

        Status                  mc_frame_forward_420(IppVideoContext *video);
        Status                  mc_frame_forward_422(IppVideoContext *video);
        Status                  mc_field_forward_420(IppVideoContext *video);
        Status                  mc_field_forward_422(IppVideoContext *video);

        Status                  mc_frame_backward_420(IppVideoContext *video);
        Status                  mc_frame_backward_422(IppVideoContext *video);
        Status                  mc_field_backward_420(IppVideoContext *video);
        Status                  mc_field_backward_422(IppVideoContext *video);

        Status                  mc_frame_backward_add_420(IppVideoContext *video);
        Status                  mc_frame_backward_add_422(IppVideoContext *video);
        Status                  mc_field_backward_add_420(IppVideoContext *video);
        Status                  mc_field_backward_add_422(IppVideoContext *video);

        Status                  mc_fullpel_forward(IppVideoContext *video);
        Status                  mc_fullpel_backward(IppVideoContext *video);
        Status                  mc_fullpel_backward_add(IppVideoContext *video);

        void                    mc_frame_forward0_420(IppVideoContext *video);
        void                    mc_frame_forward0_422(IppVideoContext *video);
        void                    mc_field_forward0_420(IppVideoContext *video);
        void                    mc_field_forward0_422(IppVideoContext *video);

        Status                  mc_dualprime_frame_420(IppVideoContext *video);
        Status                  mc_dualprime_frame_422(IppVideoContext *video);
        Status                  mc_dualprime_field_420(IppVideoContext *video);
        Status                  mc_dualprime_field_422(IppVideoContext *video);

        Status                  mc_mp2_420b_skip(IppVideoContext *video);
        Status                  mc_mp2_422b_skip(IppVideoContext *video);
        Status                  mc_mp2_420_skip(IppVideoContext *video);
        Status                  mc_mp2_422_skip(IppVideoContext *video);

        Ipp32s blkOffsets[3][8];
        Ipp32s blkPitches[3][2];


 private:
         void                   sequence_display_extension();
         void                   sequence_scalable_extension();
         void                   picture_temporal_scalable_extension();
         void                   picture_spartial_scalable_extension();
         void                   picture_display_extension();
         void                   copyright_extension();
         void                   quant_matrix_extension();

         void                   ReadCCData();

protected:
    };
}

#endif // __UMC_MPEG2_DEC_BASE_H

#endif // UMC_ENABLE_MPEG2_VIDEO_DECODER