IntraX8 (J-Frame) subdecoder, used by WMV2 and VC-1. More...

#include "libavutil/avassert.h"
#include "avcodec.h"
#include "error_resilience.h"
#include "get_bits.h"
#include "mpegvideo.h"
#include "msmpeg4data.h"
#include "intrax8huf.h"
#include "intrax8.h"
#include "intrax8dsp.h"

Macros
#define	MAX_TABLE_DEPTH(table_bits, max_bits) ((max_bits+table_bits-1)/table_bits)

#define	DC_VLC_BITS 9

#define	AC_VLC_BITS 9

#define	OR_VLC_BITS 7

#define	DC_VLC_MTD MAX_TABLE_DEPTH(DC_VLC_BITS, MAX_DC_VLC_BITS)

#define	AC_VLC_MTD MAX_TABLE_DEPTH(AC_VLC_BITS, MAX_AC_VLC_BITS)

#define	OR_VLC_MTD MAX_TABLE_DEPTH(OR_VLC_BITS, MAX_OR_VLC_BITS)

#define	init_ac_vlc(dst, src)

#define	init_dc_vlc(dst, src)

#define	init_or_vlc(dst, src)

#define	extra_bits(eb) (eb)

#define	extra_run (0xFF<<8)

#define	extra_level (0x00<<8)

#define	run_offset(r) ((r)<<16)

#define	level_offset(l) ((l)<<24)

#define	B(x, y) s->block[0][w->idct_permutation[(x)+(y)*8]]

#define	T(x) ((x) * dc_level + 0x8000) >> 16;

Functions
static av_cold void	x8_vlc_init (void)

static void	x8_reset_vlc_tables (IntraX8Context *w)

static void	x8_select_ac_table (IntraX8Context *const w, int mode)

static int	x8_get_orient_vlc (IntraX8Context *w)

static void	x8_get_ac_rlf (IntraX8Context const w, const int mode, int const run, int const level, int const final)

static int	x8_get_dc_rlf (IntraX8Context const w, int const mode, int const level, int *const final)

static int	x8_setup_spatial_predictor (IntraX8Context *const w, const int chroma)

static void	x8_update_predictions (IntraX8Context *const w, const int orient, const int est_run)

static void	x8_get_prediction_chroma (IntraX8Context *const w)

static void	x8_get_prediction (IntraX8Context *const w)

static void	x8_ac_compensation (IntraX8Context *const w, int const direction, int const dc_level)

static void	dsp_x8_put_solidcolor (uint8_t const pix, uint8_t *dst, int const linesize)

static int	x8_decode_intra_mb (IntraX8Context *const w, const int chroma)

static void	x8_init_block_index (MpegEncContext *s)

av_cold void	ff_intrax8_common_init (IntraX8Context w, MpegEncContext const s)
	Initialize IntraX8 frame decoder.

av_cold void	ff_intrax8_common_end (IntraX8Context *w)
	Destroy IntraX8 frame structure.

int	ff_intrax8_decode_picture (IntraX8Context *const w, int dquant, int quant_offset)
	Decode single IntraX8 frame.

Variables
static VLC	j_ac_vlc [2][2][8]

static VLC	j_dc_vlc [2][8]

static VLC	j_orient_vlc [2][4]

static const uint32_t	ac_decode_table []

static const uint8_t	dc_index_offset [] ={ 0, 1,2, 3,4, 5,7, 9,13, 17,25, 33,49, 65,97, 129,193}

static const int16_t	quant_table [64]

Detailed Description

IntraX8 (J-Frame) subdecoder, used by WMV2 and VC-1.

Definition in file intrax8.c.

Macro Definition Documentation

#define MAX_TABLE_DEPTH	(	table_bits,
		max_bits
	)	((max_bits+table_bits-1)/table_bits)

Definition at line 34 of file intrax8.c.

#define DC_VLC_BITS 9

Definition at line 36 of file intrax8.c.

Referenced by ff_mpeg12_init_vlcs(), and x8_get_dc_rlf().

#define AC_VLC_BITS 9

Definition at line 37 of file intrax8.c.

Referenced by ff_vc1_init_common(), vc1_decode_ac_coeff(), and x8_get_ac_rlf().

#define OR_VLC_BITS 7

Definition at line 38 of file intrax8.c.

Referenced by x8_get_orient_vlc().

#define DC_VLC_MTD MAX_TABLE_DEPTH(DC_VLC_BITS, MAX_DC_VLC_BITS)

Definition at line 40 of file intrax8.c.

Referenced by x8_get_dc_rlf().

#define AC_VLC_MTD MAX_TABLE_DEPTH(AC_VLC_BITS, MAX_AC_VLC_BITS)

Definition at line 41 of file intrax8.c.

Referenced by x8_get_ac_rlf().

#define OR_VLC_MTD MAX_TABLE_DEPTH(OR_VLC_BITS, MAX_OR_VLC_BITS)

Definition at line 42 of file intrax8.c.

Referenced by x8_get_orient_vlc().

#define init_ac_vlc	(	dst,
		src
	)

Value:

dst.table = &table[offset]; \
    dst.table_allocated = sizes[sizeidx]; \
    offset += sizes[sizeidx++]; \
       init_vlc(&dst, \
              AC_VLC_BITS,77, \
              &src[1],4,2, \
              &src[0],4,2, \
              INIT_VLC_USE_NEW_STATIC)

Referenced by x8_vlc_init().

#define init_dc_vlc	(	dst,
		src
	)

Value:

dst.table = &table[offset]; \
    dst.table_allocated = sizes[sizeidx]; \
    offset += sizes[sizeidx++]; \
        init_vlc(&dst, \
        DC_VLC_BITS,34, \
        &src[1],4,2, \
        &src[0],4,2, \
        INIT_VLC_USE_NEW_STATIC);

Referenced by x8_vlc_init().

#define init_or_vlc	(	dst,
		src
	)

Value:

dst.table = &table[offset]; \
    dst.table_allocated = sizes[sizeidx]; \
    offset += sizes[sizeidx++]; \
    init_vlc(&dst, \
    OR_VLC_BITS,12, \
    &src[1],4,2, \
    &src[0],4,2, \
    INIT_VLC_USE_NEW_STATIC);

Referenced by x8_vlc_init().

#define extra_bits ( eb ) (eb)

Definition at line 151 of file intrax8.c.

#define extra_run (0xFF<<8)

Definition at line 152 of file intrax8.c.

#define extra_level (0x00<<8)

Definition at line 153 of file intrax8.c.

#define run_offset ( r ) ((r)<<16)

Definition at line 154 of file intrax8.c.

#define level_offset ( l ) ((l)<<24)

Definition at line 155 of file intrax8.c.

#define B	(	x,
		y
	)	s->block[0][w->idct_permutation[(x)+(y)*8]]

#define T ( x ) ((x) * dc_level + 0x8000) >> 16;

Function Documentation

static av_cold void x8_vlc_init ( void )

static

Definition at line 48 of file intrax8.c.

Referenced by ff_intrax8_common_init().

static void x8_reset_vlc_tables ( IntraX8Context * w )

static

Definition at line 120 of file intrax8.c.

Referenced by ff_intrax8_decode_picture().

static void x8_select_ac_table	(	IntraX8Context *const	w,
		int	mode
	)

inlinestatic

Definition at line 126 of file intrax8.c.

Referenced by x8_decode_intra_mb().

static int x8_get_orient_vlc ( IntraX8Context * w )

inlinestatic

Definition at line 139 of file intrax8.c.

Referenced by x8_setup_spatial_predictor().

static void x8_get_ac_rlf	(	IntraX8Context *const	w,
		const int	mode,
		int *const	run,
		int *const	level,
		int *const	final
	)

static

Definition at line 199 of file intrax8.c.

Referenced by x8_decode_intra_mb().

static int x8_get_dc_rlf	(	IntraX8Context *const	w,
		int const	mode,
		int *const	level,
		int *const	final
	)

static

Definition at line 264 of file intrax8.c.

Referenced by x8_decode_intra_mb().

static int x8_setup_spatial_predictor	(	IntraX8Context *const	w,
		const int	chroma
	)

static

Definition at line 299 of file intrax8.c.

Referenced by ff_intrax8_decode_picture().

static void x8_update_predictions	(	IntraX8Context *const	w,
		const int	orient,
		const int	est_run
	)

static

Definition at line 351 of file intrax8.c.

Referenced by x8_decode_intra_mb().

static void x8_get_prediction_chroma ( IntraX8Context *const w )

static

Definition at line 360 of file intrax8.c.

Referenced by ff_intrax8_decode_picture().

static void x8_get_prediction ( IntraX8Context *const w )

static

Definition at line 375 of file intrax8.c.

Referenced by ff_intrax8_decode_picture().

static void x8_ac_compensation	(	IntraX8Context *const	w,
		int const	direction,
		int const	dc_level
	)

static

Definition at line 437 of file intrax8.c.

Referenced by x8_decode_intra_mb().

static void dsp_x8_put_solidcolor	(	uint8_t const	pix,
		uint8_t *	dst,
		int const	linesize
	)

static

Definition at line 507 of file intrax8.c.

Referenced by x8_decode_intra_mb().

static int x8_decode_intra_mb	(	IntraX8Context *const	w,
		const int	chroma
	)

static

Definition at line 526 of file intrax8.c.

Referenced by ff_intrax8_decode_picture().

static void x8_init_block_index ( MpegEncContext * s )

static

Definition at line 670 of file intrax8.c.

Referenced by ff_intrax8_decode_picture().

av_cold void ff_intrax8_common_init	(	IntraX8Context *	w,
		MpegEncContext *const	s
	)

Initialize IntraX8 frame decoder.

Requires valid MpegEncContext with valid s->mb_width before calling.

Parameters

w	pointer to IntraX8Context
s	pointer to MpegEncContext of the parent codec

Definition at line 691 of file intrax8.c.

Referenced by ff_vc1_decode_init_alloc_tables(), and wmv2_decode_init().

av_cold void ff_intrax8_common_end ( IntraX8Context * w )

Destroy IntraX8 frame structure.

Parameters

w	pointer to IntraX8Context

Definition at line 713 of file intrax8.c.

Referenced by ff_vc1_decode_end(), and wmv2_decode_end().

int ff_intrax8_decode_picture	(	IntraX8Context *const	w,
		int	dquant,
		int	quant_offset
	)

Decode single IntraX8 frame.

The parent codec must fill s->loopfilter and s->gb (bitstream). The parent codec must call MPV_frame_start(), ff_er_frame_start() before calling this function. The parent codec must call ff_er_frame_end(), MPV_frame_end() after calling this function. This function does not use MPV_decode_mb(). lowres decoding is theoretically impossible.

Parameters

w	pointer to IntraX8Context
dquant	doubled quantizer, it would be odd in case of VC-1 halfpq==1.
quant_offset	offset away from zero

Definition at line 730 of file intrax8.c.

Referenced by ff_vc1_decode_blocks(), and ff_wmv2_decode_secondary_picture_header().

Variable Documentation

VLC j_ac_vlc[2][2][8]

static

Definition at line 44 of file intrax8.c.

VLC j_dc_vlc[2][8]

static

Definition at line 45 of file intrax8.c.

VLC j_orient_vlc[2][4]

static

Definition at line 46 of file intrax8.c.

const uint32_t ac_decode_table[]

static

Definition at line 156 of file intrax8.c.

Referenced by x8_get_ac_rlf().

const uint8_t dc_index_offset[] ={ 0, 1,2, 3,4, 5,7, 9,13, 17,25, 33,49, 65,97, 129,193}

static

Definition at line 262 of file intrax8.c.

Referenced by x8_get_dc_rlf().

const int16_t quant_table[64]

static

Initial value:

= {
    256, 256, 256, 256,  256, 256, 259, 262,
    265, 269, 272, 275,  278, 282, 285, 288,
    292, 295, 299, 303,  306, 310, 314, 317,
    321, 325, 329, 333,  337, 341, 345, 349,
    353, 358, 362, 366,  371, 375, 379, 384,
    389, 393, 398, 403,  408, 413, 417, 422,
    428, 433, 438, 443,  448, 454, 459, 465,
    470, 476, 482, 488,  493, 499, 505, 511
}

Definition at line 515 of file intrax8.c.

Referenced by x8_decode_intra_mb().

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

Function Documentation

Variable Documentation