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h264_mvpred.h File Reference

H.264 / AVC / MPEG4 part10 motion vector predicion. More...

#include "internal.h"
#include "avcodec.h"
#include "h264.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)
 

Functions

static av_always_inline int fetch_diagonal_mv (H264Context *h, const int16_t **C, int i, int list, int part_width)
 
static av_always_inline void pred_motion (H264Context *const h, int n, int part_width, int list, int ref, int *const mx, int *const my)
 Get the predicted MV.
 
static av_always_inline void pred_16x8_motion (H264Context *const h, int n, int list, int ref, int *const mx, int *const my)
 Get the directionally predicted 16x8 MV.
 
static av_always_inline void pred_8x16_motion (H264Context *const h, int n, int list, int ref, int *const mx, int *const my)
 Get the directionally predicted 8x16 MV.
 
static av_always_inline void pred_pskip_motion (H264Context *const h)
 
static void fill_decode_neighbors (H264Context *h, int mb_type)
 
static void fill_decode_caches (H264Context *h, int mb_type)
 
static void av_unused decode_mb_skip (H264Context *h)
 decodes a P_SKIP or B_SKIP macroblock
 

Detailed Description

H.264 / AVC / MPEG4 part10 motion vector predicion.

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

Definition in file h264_mvpred.h.

Macro Definition Documentation

#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]; \
h->mv_cache[list][scan8[0] - 2][0] = mv[0]; \
h->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;

Referenced by fetch_diagonal_mv().

#define FIX_MV_MBAFF (   type,
  refn,
  mvn,
  idx 
)
Value:
if (FRAME_MBAFF(h)) { \
if (MB_FIELD(h)) { \
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] <<= 1; \
mvn = mvbuf[idx]; \
} \
} \
}

Definition at line 233 of file h264_mvpred.h.

Referenced by pred_pskip_motion().

#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])

Referenced by fill_decode_caches().

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

Function Documentation

static av_always_inline int fetch_diagonal_mv ( H264Context *  h,
const int16_t **  C,
int  i,
int  list,
int  part_width 
)
static

Definition at line 38 of file h264_mvpred.h.

Referenced by pred_8x16_motion(), and pred_motion().

static av_always_inline void pred_motion ( H264Context *const  h,
int  n,
int  part_width,
int  list,
int  ref,
int *const  mx,
int *const  my 
)
static

Get the predicted MV.

Parameters
nthe block index
part_widththe width of the partition (4, 8,16) -> (1, 2, 4)
mxthe x component of the predicted motion vector
mythe y component of the predicted motion vector

Definition at line 94 of file h264_mvpred.h.

Referenced by ff_h264_decode_mb_cabac(), ff_h264_decode_mb_cavlc(), pred_16x8_motion(), pred_8x16_motion(), and svq3_mc_dir().

static av_always_inline void pred_16x8_motion ( H264Context *const  h,
int  n,
int  list,
int  ref,
int *const  mx,
int *const  my 
)
static

Get the directionally predicted 16x8 MV.

Parameters
nthe block index
mxthe x component of the predicted motion vector
mythe y component of the predicted motion vector

Definition at line 157 of file h264_mvpred.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

static av_always_inline void pred_8x16_motion ( H264Context *const  h,
int  n,
int  list,
int  ref,
int *const  mx,
int *const  my 
)
static

Get the directionally predicted 8x16 MV.

Parameters
nthe block index
mxthe x component of the predicted motion vector
mythe y component of the predicted motion vector

Definition at line 197 of file h264_mvpred.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

static av_always_inline void pred_pskip_motion ( H264Context *const  h)
static

Definition at line 252 of file h264_mvpred.h.

Referenced by decode_mb_skip().

static void fill_decode_neighbors ( H264Context *  h,
int  mb_type 
)
static

Definition at line 350 of file h264_mvpred.h.

Referenced by decode_mb_skip(), ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

static void fill_decode_caches ( H264Context *  h,
int  mb_type 
)
static

Definition at line 439 of file h264_mvpred.h.

Referenced by decode_mb_skip(), ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

static void av_unused decode_mb_skip ( H264Context *  h)
static

decodes a P_SKIP or B_SKIP macroblock

Definition at line 797 of file h264_mvpred.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

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