VC-1 Block-level functions

Defines
#define	GET_MQUANT()
	Get macroblock-level quantizer scale.
#define	GET_MVDATA(_dmv_x, _dmv_y)
	Get MV differentials.
Functions
static void	vc1_pred_mv (MpegEncContext *s, int n, int dmv_x, int dmv_y, int mv1, int r_x, int r_y, uint8_t *is_intra)
	Predict and set motion vector.
static void	vc1_interp_mc (VC1Context *v)
	Motion compensation for direct or interpolated blocks in B-frames.
static av_always_inline int	scale_mv (int value, int bfrac, int inv, int qs)
static void	vc1_b_mc (VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)
	Reconstruct motion vector for B-frame and do motion compensation.
static void	vc1_pred_b_mv (VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)
static int	vc1_i_pred_dc (MpegEncContext *s, int overlap, int pq, int n, int16_t **dc_val_ptr, int *dir_ptr)
	Get predicted DC value for I-frames only prediction dir: left=0, top=1.
static int	vc1_pred_dc (MpegEncContext *s, int overlap, int pq, int n, int a_avail, int c_avail, int16_t **dc_val_ptr, int *dir_ptr)
	Get predicted DC value prediction dir: left=0, top=1.

---

Detailed Description

See also:

7.1.4, p91 and 8.1.1.7, p(1)04

---

Define Documentation

 

#define GET_MQUANT

(

)

Get macroblock-level quantizer scale.

Definition at line 592 of file vc1dec.c.

Referenced by vc1_decode_b_mb(), vc1_decode_i_blocks_adv(), and vc1_decode_p_mb().

#define GET_MVDATA	(	_dmv_x,
		_dmv_y		)

Get MV differentials.

See also:

MVDATA decoding from 8.3.5.2, p(1)20

Parameters:

	_dmv_x	Horizontal differential for decoded MV
	_dmv_y	Vertical differential for decoded MV

Definition at line 632 of file vc1dec.c.

Referenced by vc1_decode_b_mb(), and vc1_decode_p_mb().

---

Function Documentation

static av_always_inline int scale_mv	(	int	value,
		int	bfrac,
		int	inv,
		int	qs
	)			[static]

Definition at line 926 of file vc1dec.c.

static void vc1_b_mc	(	VC1Context *	v,
		int	dmv_x[2],
		int	dmv_y[2],
		int	direct,
		int	mode
	)			[inline, static]

Reconstruct motion vector for B-frame and do motion compensation.

Definition at line 947 of file vc1dec.c.

Referenced by vc1_decode_b_mb().

static int vc1_i_pred_dc	(	MpegEncContext *	s,
		int	overlap,
		int	pq,
		int	n,
		int16_t **	dc_val_ptr,
		int *	dir_ptr
	)			[inline, static]

Get predicted DC value for I-frames only prediction dir: left=0, top=1.

Parameters:

	s	MpegEncContext
	overlap	flag indicating that overlap filtering is used
	pq	integer part of picture quantizer
[in]	n	block index in the current MB
	dc_val_ptr	Pointer to DC predictor
	dir_ptr	Prediction direction for use in AC prediction

Definition at line 1189 of file vc1dec.c.

Referenced by vc1_decode_i_block().

static void vc1_interp_mc

(

VC1Context *

v

)

[static]

Motion compensation for direct or interpolated blocks in B-frames.

Definition at line 811 of file vc1dec.c.

Referenced by vc1_b_mc().

static void vc1_pred_b_mv	(	VC1Context *	v,
		int	dmv_x[2],
		int	dmv_y[2],
		int	direct,
		int	mvtype
	)			[inline, static]

Definition at line 971 of file vc1dec.c.

Referenced by vc1_decode_b_mb().

static int vc1_pred_dc	(	MpegEncContext *	s,
		int	overlap,
		int	pq,
		int	n,
		int	a_avail,
		int	c_avail,
		int16_t **	dc_val_ptr,
		int *	dir_ptr
	)			[inline, static]

Get predicted DC value prediction dir: left=0, top=1.

Parameters:

	s	MpegEncContext
	overlap	flag indicating that overlap filtering is used
	pq	integer part of picture quantizer
[in]	n	block index in the current MB
	a_avail	flag indicating top block availability
	c_avail	flag indicating left block availability
	dc_val_ptr	Pointer to DC predictor
	dir_ptr	Prediction direction for use in AC prediction

Definition at line 1253 of file vc1dec.c.

Referenced by vc1_decode_i_block_adv(), and vc1_decode_intra_block().

static void vc1_pred_mv	(	MpegEncContext *	s,
		int	n,
		int	dmv_x,
		int	dmv_y,
		int	mv1,
		int	r_x,
		int	r_y,
		uint8_t *	is_intra
	)			[inline, static]

Predict and set motion vector.

Definition at line 677 of file vc1dec.c.

Referenced by vc1_decode_p_mb().