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;