H.264/AVC Reference Software Encoder: refbuf.h Source File

00001 
00002 /*!
00003  ************************************************************************
00004  * \file refbuf.h
00005  *
00006  * \brief
00007  *    Declarations of the reference frame buffer types and functions
00008  ************************************************************************
00009  */
00010 #ifndef _REBUF_H_
00011 #define _REBUF_H_
00012 
00013 #include "mbuffer.h"
00014 
00015 /*!
00016  ************************************************************************
00017  * \brief
00018  *    Yields a pel line _pointer_ from one of the 16 sub-images
00019  *    Input does not require subpixel image indices
00020  ************************************************************************
00021  */
00022 static inline imgpel *UMVLine4X (StorablePicture *ref, int y, int x)
00023 {
00024 #if (PAD_AFTER)
00025   y += IMG_PAD_SIZE_TIMES4;
00026   x += IMG_PAD_SIZE_TIMES4;
00027 #endif
00028   return &(ref->p_curr_img_sub[(y & 0x03)][(x & 0x03)][iClip3( 0, ref->size_y_pad, y >> 2)][iClip3( 0, ref->size_x_pad, x >> 2)]);
00029 }
00030 
00031 /*!
00032  ************************************************************************
00033  * \brief
00034  *    Yields a pel line _pointer_ from one of the 16 sub-images
00035  *    Input does not require subpixel image indices
00036  ************************************************************************
00037  */
00038 static inline imgpel *UMVLine4Xcr (StorablePicture *ref, int cmp, int y, int x)
00039 {
00040 #if (PAD_AFTER)
00041   y += IMG_PAD_SIZE_TIMES4;
00042   x += IMG_PAD_SIZE_TIMES4;
00043 #endif
00044   return &(ref->p_img_sub[cmp][(y & 0x03)][(x & 0x03)][iClip3( 0, ref->size_y_cr_pad, y >> 2)][iClip3( 0, ref->size_x_cr_pad, x >> 2)]);
00045 }
00046 
00047 /*!
00048  ************************************************************************
00049  * \brief
00050  *    Yields a pel line _pointer_ from one of the 16 sub-images
00051  *    Input does not require subpixel image indices
00052  ************************************************************************
00053  */
00054 static inline imgpel *FastLine4X (StorablePicture *ref, int y, int x)
00055 {
00056 #if (PAD_AFTER)
00057   y += IMG_PAD_SIZE_TIMES4;
00058   x += IMG_PAD_SIZE_TIMES4;
00059 #endif
00060   return &(ref->p_curr_img_sub[(y & 0x03)][(x & 0x03)][y >> 2][x >> 2]);
00061 }
00062 
00063 /*!
00064  ************************************************************************
00065  * \brief
00066  *    Yields a pel line _pointer_ from one of the 16 (4:4:4), 32 (4:2:2),
00067  *    or 64 (4:2:0) sub-images
00068  *    Input does not require subpixel image indices
00069  ************************************************************************
00070  */
00071 static inline imgpel *UMVLine8X_chroma (StorablePicture *ref, int cmp, int y, int x)
00072 {
00073 #if (PAD_AFTER)
00074   y += IMG_PAD_SIZE_TIMES4;
00075   x += IMG_PAD_SIZE_TIMES4;
00076 #endif
00077   return &(ref->p_img_sub[cmp][y & ref->chroma_mask_mv_y][x & ref->chroma_mask_mv_x][iClip3 (0, ref->size_y_cr_pad, y >> ref->chroma_shift_y)][iClip3 (0, ref->size_x_cr_pad, x >> ref->chroma_shift_x)]);
00078 }
00079 
00080 /*!
00081  ************************************************************************
00082  * \brief
00083  *    Yields a pel line _pointer_ from one of the 16 (4:4:4), 32 (4:2:2),
00084  *    or 64 (4:2:0) sub-images
00085  *    Input does not require subpixel image indices
00086  ************************************************************************
00087  */
00088 static inline imgpel *FastLine8X_chroma (StorablePicture *ref, int cmp, int y, int x)
00089 {
00090 #if (PAD_AFTER)
00091   y += IMG_PAD_SIZE_TIMES4;
00092   x += IMG_PAD_SIZE_TIMES4;
00093 #endif
00094   return &(ref->p_img_sub[cmp][y & ref->chroma_mask_mv_y][x & ref->chroma_mask_mv_x][y >> ref->chroma_shift_y][x >> ref->chroma_shift_x]);
00095 }
00096 
00097 
00098 #endif
00099