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intrax8.c File Reference

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

#include "libavutil/avassert.h"
#include "avcodec.h"
#include "get_bits.h"
#include "idctdsp.h"
#include "msmpeg4data.h"
#include "intrax8huf.h"
#include "intrax8.h"
#include "intrax8dsp.h"
#include "mpegutils.h"

Go to the source code of this file.

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)   w->block[0][w->idct_permutation[(x) + (y) * 8]]
 
#define T(x)   ((x) * dc_level + 0x8000) >> 16;
 

Functions

static av_cold int 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, const int 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, const int direction, const int dc_level)
 
static void dsp_x8_put_solidcolor (const uint8_t pix, uint8_t *dst, const int linesize)
 
static int x8_decode_intra_mb (IntraX8Context *const w, const int chroma)
 
static void x8_init_block_index (IntraX8Context *w, AVFrame *frame)
 
av_cold int ff_intrax8_common_init (AVCodecContext *avctx, IntraX8Context *w, IDCTDSPContext *idsp, int16_t(*block)[64], int block_last_index[12], int mb_width, int mb_height)
 Initialize IntraX8 frame decoder. More...
 
av_cold void ff_intrax8_common_end (IntraX8Context *w)
 Destroy IntraX8 frame structure. More...
 
int ff_intrax8_decode_picture (IntraX8Context *const w, Picture *pict, GetBitContext *gb, int *mb_x, int *mb_y, int dquant, int quant_offset, int loopfilter, int lowdelay)
 Decode single IntraX8 frame. More...
 

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 []
 
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 37 of file intrax8.c.

Referenced by decode_dc(), ff_mpeg12_init_vlcs(), and x8_get_dc_rlf().

#define AC_VLC_BITS   9

Definition at line 38 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 39 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 41 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 42 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 43 of file intrax8.c.

Referenced by x8_get_orient_vlc().

#define init_ac_vlc (   dst,
  src 
)
Value:
do { \
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, \
} while(0)
#define AC_VLC_BITS
Definition: intrax8.c:38
#define src
Definition: vp8dsp.c:254
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: vlc.h:38
static const int sizes[][2]
Definition: img2dec.c:50
static const struct endianess table[]
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#define INIT_VLC_USE_NEW_STATIC
Definition: vlc.h:55

Referenced by x8_vlc_init().

#define init_dc_vlc (   dst,
  src 
)
Value:
do { \
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, \
} while(0)
#define src
Definition: vp8dsp.c:254
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: vlc.h:38
static const int sizes[][2]
Definition: img2dec.c:50
static const struct endianess table[]
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#define DC_VLC_BITS
Definition: intrax8.c:37
#define INIT_VLC_USE_NEW_STATIC
Definition: vlc.h:55

Referenced by x8_vlc_init().

#define init_or_vlc (   dst,
  src 
)
Value:
do { \
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, \
} while(0)
#define src
Definition: vp8dsp.c:254
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: vlc.h:38
static const int sizes[][2]
Definition: img2dec.c:50
static const struct endianess table[]
#define OR_VLC_BITS
Definition: intrax8.c:39
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#define INIT_VLC_USE_NEW_STATIC
Definition: vlc.h:55

Referenced by x8_vlc_init().

#define extra_bits (   eb)    (eb)

Definition at line 159 of file intrax8.c.

Referenced by decode_entropy_coded_image(), and reap_filters().

#define extra_run   (0xFF << 8)

Definition at line 160 of file intrax8.c.

#define extra_level   (0x00 << 8)

Definition at line 161 of file intrax8.c.

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

Definition at line 162 of file intrax8.c.

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

Definition at line 163 of file intrax8.c.

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

Referenced by x8_ac_compensation().

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

Referenced by x8_ac_compensation().

Function Documentation

static av_cold int x8_vlc_init ( void  )
static

Definition at line 49 of file intrax8.c.

Referenced by ff_intrax8_common_init().

static void x8_reset_vlc_tables ( IntraX8Context w)
static

Definition at line 127 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 134 of file intrax8.c.

Referenced by x8_decode_intra_mb().

static int x8_get_orient_vlc ( IntraX8Context w)
inlinestatic

Definition at line 149 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 206 of file intrax8.c.

Referenced by x8_decode_intra_mb().

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

Definition at line 286 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 322 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 380 of file intrax8.c.

Referenced by x8_decode_intra_mb().

static void x8_get_prediction_chroma ( IntraX8Context *const  w)
static

Definition at line 390 of file intrax8.c.

Referenced by ff_intrax8_decode_picture().

static void x8_get_prediction ( IntraX8Context *const  w)
static

Definition at line 406 of file intrax8.c.

Referenced by ff_intrax8_decode_picture().

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

Definition at line 475 of file intrax8.c.

Referenced by x8_decode_intra_mb().

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

Definition at line 546 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 567 of file intrax8.c.

Referenced by ff_intrax8_decode_picture().

static void x8_init_block_index ( IntraX8Context w,
AVFrame frame 
)
static

Definition at line 711 of file intrax8.c.

Referenced by ff_intrax8_decode_picture().

av_cold int ff_intrax8_common_init ( AVCodecContext avctx,
IntraX8Context w,
IDCTDSPContext idsp,
int16_t(*)  block[64],
int  block_last_index[12],
int  mb_width,
int  mb_height 
)

Initialize IntraX8 frame decoder.

Parameters
avctxpointer to AVCodecContext
wpointer to IntraX8Context
idsppointer to IDCTDSPContext
blockpointer to block array
block_last_indexpointer to index array
mb_widthmacroblock width
mb_heightmacroblock height
Returns
0 on success, a negative AVERROR value on error

Definition at line 728 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
wpointer to IntraX8Context

Definition at line 768 of file intrax8.c.

Referenced by ff_vc1_decode_end(), and wmv2_decode_end().

int ff_intrax8_decode_picture ( IntraX8Context w,
Picture pict,
GetBitContext gb,
int mb_x,
int mb_y,
int  quant,
int  halfpq,
int  loopfilter,
int  lowdelay 
)

Decode single IntraX8 frame.

lowres decoding is theoretically impossible.

Parameters
wpointer to IntraX8Context
pictthe output Picture containing an AVFrame
gbopen bitstream reader
mb_xpointer to the x coordinate of the current macroblock
mb_ypointer to the y coordinate of the current macroblock
dquantdoubled quantizer, it would be odd in case of VC-1 halfpq==1.
quant_offsetoffset away from zero
loopfilterenable filter after decoding a block

Definition at line 773 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 45 of file intrax8.c.

VLC j_dc_vlc[2][8]
static

Definition at line 46 of file intrax8.c.

VLC j_orient_vlc[2][4]
static

Definition at line 47 of file intrax8.c.

const uint32_t ac_decode_table[]
static

Definition at line 164 of file intrax8.c.

Referenced by x8_get_ac_rlf().

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

Definition at line 282 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 556 of file intrax8.c.

Referenced by x8_decode_intra_mb().