refbuf.h

MPEG-4编解码的实现(包括MPEG4视音频编解码)

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/*!
 ************************************************************************
 * \file refbuf.h
 *
 * \brief
 *    Declarations of the reference frame buffer types and functions
 ************************************************************************
 */
#ifndef _REBUF_H_
#define _REBUF_H_

#define HACK

#include "global.h"

#ifdef HACK

pel_t UMVPelY_14 (pel_t **Pic, int y, int x);
pel_t FastPelY_14 (pel_t **Pic, int y, int x);

pel_t UMVPelY_18 (pel_t **Pic, int y, int x);
pel_t FastPelY_18 (pel_t **Pic, int y, int x);

pel_t UMVPelY_11 (pel_t *Pic, int y, int x);
pel_t FastPelY_11 (pel_t *Pic, int y, int x);
pel_t *FastLine16Y_11 (pel_t *Pic, int y, int x);
pel_t *UMVLine16Y_11 (pel_t *Pic, int y, int x);

void PutPel_14 (pel_t **Pic, int y, int x, pel_t val);
void PutPel_11 (pel_t *Pic, int y, int x, pel_t val);

#endif


#ifndef HACK

typedef struct {
  int   Id;     // reference buffer ID, TR or Annex U style
  // The planes
  pel_t *y;     // Buffer of Y, U, V pels, Semantic is hidden in refbuf.c
  pel_t *u;     // Currently this is a 1/4 pel buffer
  pel_t *v;

  // Plane geometric/storage characteristics
  int   x_ysize;  // Size of Y buffer in columns, should be aligned to machine
  int   y_ysize;  // chracateristics such as word and cache line size, will be
            // set by the alloc routines
  int   x_uvsize;
  int   y_uvsize;

  // Active pixels in plane
  int   x_yfirst; // First active column, measured in 1/1 pel
  int   x_ylast;  // Last active column
  int   y_yfirst; // First active row, measure in 1/1 pel
  int   y_ylast;  // Last acrive row

  int   x_uvfirst;
  int   x_uvlast;
  int   y_uvfirst;
  int   y_uvlast;

} refpic_t;


// Alloc and free for reference buffers

refpic_t *AllocRefPic (int Id,
            int NumCols,
            int NumRows,
            int MaxMotionVectorX,   // MV Size may be used to allocate additional
            int MaxMotionVectorY);  // memory around boundaries fro UMV search

int FreeRefPic (refpic_t *Pic);

// Access functions for full pel (1/1 pel)

pel_t PelY_11 (refpic_t *Pic, int y, int x);
pel_t PelU_11 (refpic_t *Pic, int y, int x);
pel_t PelV_11 (refpic_t *Pic, int y, int x);

pel_t *MBLineY_11 (refpic_t *Pic, int y, int x);

// Access functions for half pel (1/2 pel)

pel_t PelY_12 (refpic_t *Pic, int y, int x);


// Access functions for quater pel (1/4 pel)

pel_t PelY_14 (refpic_t *Pic, int y, int x);


// Access functions for one-eigths pel (1/8 pel)

pel_t PelY_18 (refpic_t *Pic, int y, int x);


#endif

#endif