VC-1 and WMV3 block decoding routines. More...

#include "avcodec.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "msmpeg4data.h"
#include "unary.h"
#include "vc1.h"
#include "vc1_pred.h"
#include "vc1acdata.h"
#include "vc1data.h"

Macros
#define	MB_INTRA_VLC_BITS 9

#define	DC_VLC_BITS 9

#define	inc_blk_idx(idx)

Functions
static void	vc1_put_signed_blocks_clamped (VC1Context *v)

static int	vc1_decode_p_mb (VC1Context *v)
	Decode one P-frame MB. More...

static int	vc1_decode_p_mb_intfr (VC1Context *v)

static int	vc1_decode_p_mb_intfi (VC1Context *v)

static void	vc1_decode_b_mb (VC1Context *v)
	Decode one B-frame MB (in Main profile) More...

static void	vc1_decode_b_mb_intfi (VC1Context *v)
	Decode one B-frame MB (in interlaced field B picture) More...

static int	vc1_decode_b_mb_intfr (VC1Context *v)
	Decode one B-frame MB (in interlaced frame B picture) More...

static void	vc1_decode_i_blocks (VC1Context *v)
	Decode blocks of I-frame. More...

static void	vc1_decode_i_blocks_adv (VC1Context *v)
	Decode blocks of I-frame for advanced profile. More...

static void	vc1_decode_p_blocks (VC1Context *v)

static void	vc1_decode_b_blocks (VC1Context *v)

static void	vc1_decode_skip_blocks (VC1Context *v)

void	ff_vc1_decode_blocks (VC1Context *v)

VC-1 Bitplane decoding
See Also 8.7, p56
static void	init_block_index (VC1Context *v)

VC1 Macroblock-level functions in Simple/Main Profiles
See Also 7.1.4, p91 and 8.1.1.7, p(1)04
static int	vc1_coded_block_pred (MpegEncContext s, int n, uint8_t *coded_block_ptr)

static void	vc1_decode_ac_coeff (VC1Context v, int last, int skip, int value, int codingset)
	Decode one AC coefficient. More...

static int	vc1_decode_i_block (VC1Context *v, int16_t block[64], int n, int coded, int codingset)
	Decode intra block in intra frames - should be faster than decode_intra_block. More...

static int	vc1_decode_i_block_adv (VC1Context *v, int16_t block[64], int n, int coded, int codingset, int mquant)
	Decode intra block in intra frames - should be faster than decode_intra_block. More...

static int	vc1_decode_intra_block (VC1Context *v, int16_t block[64], int n, int coded, int mquant, int codingset)
	Decode intra block in inter frames - more generic version than vc1_decode_i_block. More...

static int	vc1_decode_p_block (VC1Context v, int16_t block[64], int n, int mquant, int ttmb, int first_block, uint8_t dst, int linesize, int skip_block, int *ttmb_out)
	Decode P block. More...

Variables
static const uint8_t	offset_table [2][9]

static const uint8_t	size_table [6] = { 0, 2, 3, 4, 5, 8 }

VC-1 Block-level functions
See Also 7.1.4, p91 and 8.1.1.7, p(1)04
#define	GET_MQUANT()
	Get macroblock-level quantizer scale. More...

#define	GET_MVDATA(_dmv_x, _dmv_y)
	Get MV differentials. More...

static av_always_inline void	get_mvdata_interlaced (VC1Context v, int dmv_x, int dmv_y, int pred_flag)

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. More...

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. More...

static int	ff_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. More...

Detailed Description

VC-1 and WMV3 block decoding routines.

Definition in file vc1_block.c.

Macro Definition Documentation

#define MB_INTRA_VLC_BITS 9

Definition at line 39 of file vc1_block.c.

Referenced by vc1_decode_i_blocks(), and vc1_decode_i_blocks_adv().

#define DC_VLC_BITS 9

Definition at line 40 of file vc1_block.c.

Referenced by vc1_decode_i_block(), vc1_decode_i_block_adv(), and vc1_decode_intra_block().

#define inc_blk_idx ( idx )

Value:

do { \
        idx++; \
        if (idx >= v->n_allocated_blks) \
            idx = 0; \
    } while (0)

Referenced by vc1_put_signed_blocks_clamped().

#define GET_MQUANT ( )

Get macroblock-level quantizer scale.

Definition at line 163 of file vc1_block.c.

Referenced by vc1_decode_b_mb(), vc1_decode_b_mb_intfi(), vc1_decode_b_mb_intfr(), vc1_decode_i_blocks_adv(), vc1_decode_p_mb(), vc1_decode_p_mb_intfi(), and vc1_decode_p_mb_intfr().

#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 205 of file vc1_block.c.

Referenced by vc1_decode_b_mb(), and vc1_decode_p_mb().

Function Documentation

static void init_block_index ( VC1Context * v )

inlinestatic

Definition at line 56 of file vc1_block.c.

Referenced by vc1_decode_b_blocks(), vc1_decode_i_blocks(), vc1_decode_i_blocks_adv(), vc1_decode_p_blocks(), and vc1_decode_skip_blocks().

static void vc1_put_signed_blocks_clamped ( VC1Context * v )

static

Definition at line 69 of file vc1_block.c.

Referenced by vc1_decode_i_blocks_adv().

static av_always_inline void get_mvdata_interlaced	(	VC1Context *	v,
		int *	dmv_x,
		int *	dmv_y,
		int *	pred_flag
	)

static

Definition at line 243 of file vc1_block.c.

Referenced by vc1_decode_b_mb_intfi(), vc1_decode_b_mb_intfr(), vc1_decode_p_mb_intfi(), and vc1_decode_p_mb_intfr().

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

inlinestatic

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

Definition at line 294 of file vc1_block.c.

Referenced by vc1_decode_b_mb(), and vc1_decode_b_mb_intfi().

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

inlinestatic

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 320 of file vc1_block.c.

Referenced by vc1_decode_i_block().

static int ff_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
	)

inlinestatic

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 385 of file vc1_block.c.

Referenced by vc1_decode_i_block_adv(), and vc1_decode_intra_block().

static int vc1_coded_block_pred	(	MpegEncContext *	s,
		int	n,
		uint8_t **	coded_block_ptr
	)

inlinestatic

Definition at line 456 of file vc1_block.c.

Referenced by vc1_decode_i_blocks(), and vc1_decode_i_blocks_adv().

static void vc1_decode_ac_coeff	(	VC1Context *	v,
		int *	last,
		int *	skip,
		int *	value,
		int	codingset
	)

static

Decode one AC coefficient.

Parameters

v	The VC1 context
last	Last coefficient
skip	How much zero coefficients to skip
value	Decoded AC coefficient value
codingset	set of VLC to decode data

See Also: 8.1.3.4

Definition at line 492 of file vc1_block.c.

Referenced by vc1_decode_i_block(), vc1_decode_i_block_adv(), vc1_decode_intra_block(), and vc1_decode_p_block().

static int vc1_decode_i_block	(	VC1Context *	v,
		int16_t	block[64],
		int	n,
		int	coded,
		int	codingset
	)

static

Decode intra block in intra frames - should be faster than decode_intra_block.

Parameters

	v	VC1Context
	block	block to decode
[in]	n	subblock index
	coded	are AC coeffs present or not
	codingset	set of VLC to decode data

Definition at line 553 of file vc1_block.c.

Referenced by vc1_decode_i_blocks().

static int vc1_decode_i_block_adv	(	VC1Context *	v,
		int16_t	block[64],
		int	n,
		int	coded,
		int	codingset,
		int	mquant
	)

static

Decode intra block in intra frames - should be faster than decode_intra_block.

Parameters

	v	VC1Context
	block	block to decode
[in]	n	subblock number
	coded	are AC coeffs present or not
	codingset	set of VLC to decode data
	mquant	quantizer value for this macroblock

Definition at line 693 of file vc1_block.c.

Referenced by vc1_decode_i_blocks_adv().

static int vc1_decode_intra_block	(	VC1Context *	v,
		int16_t	block[64],
		int	n,
		int	coded,
		int	mquant,
		int	codingset
	)

static

Decode intra block in inter frames - more generic version than vc1_decode_i_block.

Parameters

	v	VC1Context
	block	block to decode
[in]	n	subblock index
	coded	are AC coeffs present or not
	mquant	block quantizer
	codingset	set of VLC to decode data

Definition at line 883 of file vc1_block.c.

Referenced by vc1_decode_b_mb(), vc1_decode_b_mb_intfi(), vc1_decode_b_mb_intfr(), vc1_decode_p_mb(), vc1_decode_p_mb_intfi(), and vc1_decode_p_mb_intfr().

static int vc1_decode_p_block	(	VC1Context *	v,
		int16_t	block[64],
		int	n,
		int	mquant,
		int	ttmb,
		int	first_block,
		uint8_t *	dst,
		int	linesize,
		int	skip_block,
		int *	ttmb_out
	)

static

Decode P block.

Definition at line 1089 of file vc1_block.c.

Referenced by vc1_decode_b_mb(), vc1_decode_b_mb_intfi(), vc1_decode_b_mb_intfr(), vc1_decode_p_mb(), vc1_decode_p_mb_intfi(), and vc1_decode_p_mb_intfr().

static int vc1_decode_p_mb ( VC1Context * v )

static

Decode one P-frame MB.

Definition at line 1252 of file vc1_block.c.

Referenced by vc1_decode_p_blocks().

static int vc1_decode_p_mb_intfr ( VC1Context * v )

static

Definition at line 1496 of file vc1_block.c.

Referenced by vc1_decode_p_blocks().

static int vc1_decode_p_mb_intfi ( VC1Context * v )

static

Definition at line 1704 of file vc1_block.c.

Referenced by vc1_decode_p_blocks().

static void vc1_decode_b_mb ( VC1Context * v )

static

Decode one B-frame MB (in Main profile)

Definition at line 1825 of file vc1_block.c.

Referenced by vc1_decode_b_blocks().

static void vc1_decode_b_mb_intfi ( VC1Context * v )

static

Decode one B-frame MB (in interlaced field B picture)

Definition at line 1980 of file vc1_block.c.

Referenced by vc1_decode_b_blocks().

static int vc1_decode_b_mb_intfr ( VC1Context * v )

static

Decode one B-frame MB (in interlaced frame B picture)

Definition at line 2140 of file vc1_block.c.

Referenced by vc1_decode_b_blocks().

static void vc1_decode_i_blocks ( VC1Context * v )

static

Decode blocks of I-frame.

Definition at line 2487 of file vc1_block.c.

Referenced by ff_vc1_decode_blocks().

static void vc1_decode_i_blocks_adv ( VC1Context * v )

static

Decode blocks of I-frame for advanced profile.

Definition at line 2632 of file vc1_block.c.

Referenced by ff_vc1_decode_blocks().

static void vc1_decode_p_blocks ( VC1Context * v )

static

Definition at line 2766 of file vc1_block.c.

Referenced by ff_vc1_decode_blocks().

static void vc1_decode_b_blocks ( VC1Context * v )

static

Definition at line 2843 of file vc1_block.c.

Referenced by ff_vc1_decode_blocks().

static void vc1_decode_skip_blocks ( VC1Context * v )

static

Definition at line 2907 of file vc1_block.c.

Referenced by ff_vc1_decode_blocks().

void ff_vc1_decode_blocks ( VC1Context * v )

Definition at line 2929 of file vc1_block.c.

Referenced by decode_wmv9(), and vc1_decode_frame().

Variable Documentation

const uint8_t offset_table[2][9]

static

Initial value:

= {
    {  0,  1,  2,  4,  8, 16, 32,  64, 128 },
    {  0,  1,  3,  7, 15, 31, 63, 127, 255 },
}

Definition at line 43 of file vc1_block.c.

Referenced by get_mvdata_interlaced().

const uint8_t size_table[6] = { 0, 2, 3, 4, 5, 8 }

static

Definition at line 1248 of file vc1_block.c.

Macros

Functions

Variables

VC-1 Block-level functions

Detailed Description

Macro Definition Documentation

Function Documentation

Variable Documentation