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

#include "h264dec.h"
#include "mpegutils.h"
#include "rectangle.h"
#include "libavutil/avassert.h"
#include "libavutil/mem_internal.h"

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	pred_intra_mode (const H264Context h, H264SliceContext sl, int n)
	Get the predicted intra4x4 prediction mode.

static av_always_inline void	write_back_intra_pred_mode (const H264Context h, H264SliceContext sl)

static av_always_inline void	write_back_non_zero_count (const H264Context h, H264SliceContext sl)

static av_always_inline void	write_back_motion_list (const H264Context h, H264SliceContext sl, int b_stride, int b_xy, int b8_xy, int mb_type, int list)

static av_always_inline void	write_back_motion (const H264Context h, H264SliceContext sl, int mb_type)

static av_always_inline int	get_dct8x8_allowed (const H264Context h, H264SliceContext sl)

static av_always_inline int	fetch_diagonal_mv (const H264Context h, H264SliceContext sl, const int16_t **C, int i, int list, int part_width)

static av_always_inline void	pred_motion (const H264Context const h, H264SliceContext sl, 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 (const H264Context const h, H264SliceContext sl, 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 (const H264Context const h, H264SliceContext sl, 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 (const H264Context const h, H264SliceContext sl)

static void	fill_decode_neighbors (const H264Context h, H264SliceContext sl, int mb_type)

static void	fill_decode_caches (const H264Context h, H264SliceContext sl, int mb_type)

static av_unused void	decode_mb_skip (const H264Context h, H264SliceContext sl)
	decodes a P_SKIP or B_SKIP macroblock

Detailed Description

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

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

Definition in file h264_mvpred.h.

Macro Definition Documentation

◆ 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;

Referenced by fetch_diagonal_mv().

◆ 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];               \
            }                                   \
        }                                       \
    }

Definition at line 369 of file h264_mvpred.h.

Referenced by pred_pskip_motion().

◆ 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])

Referenced by fill_decode_caches().

◆ 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;                              \
    }

Function Documentation

◆ pred_intra_mode()

static av_always_inline int pred_intra_mode	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	n )

static

Get the predicted intra4x4 prediction mode.

Definition at line 42 of file h264_mvpred.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

◆ write_back_intra_pred_mode()

static av_always_inline void write_back_intra_pred_mode	(	const H264Context *	h,
		H264SliceContext *	sl )

static

Definition at line 58 of file h264_mvpred.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

◆ write_back_non_zero_count()

static av_always_inline void write_back_non_zero_count	(	const H264Context *	h,
		H264SliceContext *	sl )

static

Definition at line 70 of file h264_mvpred.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

◆ write_back_motion_list()

static av_always_inline void write_back_motion_list	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	b_stride,
		int	b_xy,
		int	b8_xy,
		int	mb_type,
		int	list )

static

Definition at line 94 of file h264_mvpred.h.

Referenced by write_back_motion().

◆ write_back_motion()

static av_always_inline void write_back_motion	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	mb_type )

static

Definition at line 130 of file h264_mvpred.h.

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

◆ get_dct8x8_allowed()

static av_always_inline int get_dct8x8_allowed	(	const H264Context *	h,
		H264SliceContext *	sl )

static

Definition at line 157 of file h264_mvpred.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

◆ fetch_diagonal_mv()

static av_always_inline int fetch_diagonal_mv	(	const H264Context *	h,
		H264SliceContext *	sl,
		const int16_t **	C,
		int	i,
		int	list,
		int	part_width )

static

Definition at line 169 of file h264_mvpred.h.

Referenced by pred_8x16_motion(), and pred_motion().

◆ pred_motion()

static av_always_inline void pred_motion	(	const H264Context *const	h,
		H264SliceContext *	sl,
		int	n,
		int	part_width,
		int	list,
		int	ref,
		int *const	mx,
		int *const	my )

static

Get the predicted MV.

Parameters

n	the block index
part_width	the width of the partition (4, 8,16) -> (1, 2, 4)
mx	the x component of the predicted motion vector
my	the y component of the predicted motion vector

Definition at line 226 of file h264_mvpred.h.

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

◆ pred_16x8_motion()

static av_always_inline void pred_16x8_motion	(	const H264Context *const	h,
		H264SliceContext *	sl,
		int	n,
		int	list,
		int	ref,
		int *const	mx,
		int *const	my )

static

Get the directionally predicted 16x8 MV.

Parameters

n	the block index
mx	the x component of the predicted motion vector
my	the y component of the predicted motion vector

Definition at line 291 of file h264_mvpred.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

◆ pred_8x16_motion()

static av_always_inline void pred_8x16_motion	(	const H264Context *const	h,
		H264SliceContext *	sl,
		int	n,
		int	list,
		int	ref,
		int *const	mx,
		int *const	my )

static

Get the directionally predicted 8x16 MV.

Parameters

n	the block index
mx	the x component of the predicted motion vector
my	the y component of the predicted motion vector

Definition at line 332 of file h264_mvpred.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

◆ pred_pskip_motion()

static av_always_inline void pred_pskip_motion	(	const H264Context *const	h,
		H264SliceContext *	sl )

static

Definition at line 388 of file h264_mvpred.h.

Referenced by decode_mb_skip().

◆ fill_decode_neighbors()

static void fill_decode_neighbors	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	mb_type )

static

Definition at line 487 of file h264_mvpred.h.

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

◆ fill_decode_caches()

static void fill_decode_caches	(	const H264Context *	h,
		H264SliceContext *	sl,
		int	mb_type )

static

Definition at line 576 of file h264_mvpred.h.

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

◆ decode_mb_skip()

static av_unused void decode_mb_skip	(	const H264Context *	h,
		H264SliceContext *	sl )

static

decodes a P_SKIP or B_SKIP macroblock

Definition at line 934 of file h264_mvpred.h.

Referenced by ff_h264_decode_mb_cabac(), and ff_h264_decode_mb_cavlc().

Macros

Functions

Detailed Description

Macro Definition Documentation

◆ SET_DIAG_MV

◆ FIX_MV_MBAFF

◆ MAP_MVS

◆ MAP_F2F [1/2]

◆ MAP_F2F [2/2]

Function Documentation

◆ pred_intra_mode()

◆ write_back_intra_pred_mode()

◆ write_back_non_zero_count()

◆ write_back_motion_list()

◆ write_back_motion()

◆ get_dct8x8_allowed()

◆ fetch_diagonal_mv()

◆ pred_motion()

◆ pred_16x8_motion()

◆ pred_8x16_motion()

◆ pred_pskip_motion()

◆ fill_decode_neighbors()

◆ fill_decode_caches()

◆ decode_mb_skip()