FFmpeg
Macros
h264_mvpred.h File Reference

H.264 / AVC / MPEG-4 part10 motion vector prediction. More...

#include "internal.h"
#include "avcodec.h"
#include "h264dec.h"
#include "mpegutils.h"
#include "libavutil/avassert.h"

Go to the source code of this file.

Macros

#define SET_DIAG_MV(MV_OP, REF_OP, XY, Y4)
 
#define FIX_MV_MBAFF(type, refn, mvn, idx)
 
#define MAP_MVS
 
#define MAP_F2F(idx, mb_type)
 
#define MAP_F2F(idx, mb_type)
 

Detailed Description

H.264 / AVC / MPEG-4 part10 motion vector prediction.

Author
Michael Niedermayer micha.nosp@m.elni.nosp@m.@gmx..nosp@m.at

Macro Definition Documentation

§ FIX_MV_MBAFF

#define FIX_MV_MBAFF (   type,
  refn,
  mvn,
  idx 
)
Value:
if (FRAME_MBAFF(h)) { \
if (MB_FIELD(sl)) { \
if (!IS_INTERLACED(type)) { \
refn <<= 1; \
AV_COPY32(mvbuf[idx], mvn); \
mvbuf[idx][1] /= 2; \
mvn = mvbuf[idx]; \
} \
} else { \
if (IS_INTERLACED(type)) { \
refn >>= 1; \
AV_COPY32(mvbuf[idx], mvn); \
mvbuf[idx][1] *= 2; \
mvn = mvbuf[idx]; \
} \
} \
}

§ MAP_F2F [1/2]

#define MAP_F2F (   idx,
  mb_type 
)
Value:
if (!IS_INTERLACED(mb_type) && sl->ref_cache[list][idx] >= 0) { \
sl->ref_cache[list][idx] *= 2; \
sl->mv_cache[list][idx][1] /= 2; \
sl->mvd_cache[list][idx][1] >>= 1; \
}

§ MAP_F2F [2/2]

#define MAP_F2F (   idx,
  mb_type 
)
Value:
if (IS_INTERLACED(mb_type) && sl->ref_cache[list][idx] >= 0) { \
sl->ref_cache[list][idx] >>= 1; \
sl->mv_cache[list][idx][1] *= 2; \
sl->mvd_cache[list][idx][1] <<= 1; \
}

§ MAP_MVS

#define MAP_MVS
Value:
MAP_F2F(scan8[0] - 1 - 1 * 8, topleft_type) \
MAP_F2F(scan8[0] + 0 - 1 * 8, top_type) \
MAP_F2F(scan8[0] + 1 - 1 * 8, top_type) \
MAP_F2F(scan8[0] + 2 - 1 * 8, top_type) \
MAP_F2F(scan8[0] + 3 - 1 * 8, top_type) \
MAP_F2F(scan8[0] + 4 - 1 * 8, topright_type) \
MAP_F2F(scan8[0] - 1 + 0 * 8, left_type[LTOP]) \
MAP_F2F(scan8[0] - 1 + 1 * 8, left_type[LTOP]) \
MAP_F2F(scan8[0] - 1 + 2 * 8, left_type[LBOT]) \
MAP_F2F(scan8[0] - 1 + 3 * 8, left_type[LBOT])

§ SET_DIAG_MV

#define SET_DIAG_MV (   MV_OP,
  REF_OP,
  XY,
  Y4 
)
Value:
const int xy = XY, y4 = Y4; \
const int mb_type = mb_types[xy + (y4 >> 2) * h->mb_stride]; \
if (!USES_LIST(mb_type, list)) \
return LIST_NOT_USED; \
mv = h->cur_pic_ptr->motion_val[list][h->mb2b_xy[xy] + 3 + y4 * h->b_stride]; \
sl->mv_cache[list][scan8[0] - 2][0] = mv[0]; \
sl->mv_cache[list][scan8[0] - 2][1] = mv[1] MV_OP; \
return h->cur_pic_ptr->ref_index[list][4 * xy + 1 + (y4 & ~1)] REF_OP;