Libav 0.7.1
Defines | Functions | Variables
libavcodec/vc1dec.c File Reference

VC-1 and WMV3 decoder. More...

#include "internal.h"
#include "dsputil.h"
#include "avcodec.h"
#include "mpegvideo.h"
#include "h263.h"
#include "vc1.h"
#include "vc1data.h"
#include "vc1acdata.h"
#include "msmpeg4data.h"
#include "unary.h"
#include "simple_idct.h"
#include "mathops.h"
#include "vdpau_internal.h"
#include <assert.h>

Go to the source code of this file.

Defines

#define MB_INTRA_VLC_BITS   9
#define DC_VLC_BITS   9
#define AC_VLC_BITS   9
#define inc_blk_idx(idx)
#define transpose(x)   ((x>>3) | ((x&7)<<3))

Enumerations

VC-1 Bitplane decoding
See also:
8.7, p56
enum  Imode {
  IMODE_RAW, IMODE_NORM2, IMODE_DIFF2, IMODE_NORM6,
  IMODE_DIFF6, IMODE_ROWSKIP, IMODE_COLSKIP, IMODE_RAW,
  IMODE_NORM2, IMODE_DIFF2, IMODE_NORM6, IMODE_DIFF6,
  IMODE_ROWSKIP, IMODE_COLSKIP
}
 Imode types. More...

Functions

static int vc1_init_common (VC1Context *v)
 Init VC-1 specific tables and VC1Context members.
static void vc1_put_signed_blocks_clamped (VC1Context *v)
static void vc1_loop_filter_iblk (VC1Context *v, int pq)
static void vc1_loop_filter_iblk_delayed (VC1Context *v, int pq)
static void vc1_smooth_overlap_filter_iblk (VC1Context *v)
static void vc1_mc_1mv (VC1Context *v, int dir)
 Do motion compensation over 1 macroblock Mostly adapted hpel_motion and qpel_motion from mpegvideo.c.
static void vc1_mc_4mv_luma (VC1Context *v, int n)
 Do motion compensation for 4-MV macroblock - luminance block.
static int median4 (int a, int b, int c, int d)
static void vc1_mc_4mv_chroma (VC1Context *v)
 Do motion compensation for 4-MV macroblock - both chroma blocks.
static av_always_inline void vc1_apply_p_v_loop_filter (VC1Context *v, int block_num)
static av_always_inline void vc1_apply_p_h_loop_filter (VC1Context *v, int block_num)
static void vc1_apply_p_loop_filter (VC1Context *v)
static int vc1_decode_p_mb (VC1Context *v)
 Decode one P-frame MB (in Simple/Main profile)
static void vc1_decode_b_mb (VC1Context *v)
 Decode one B-frame MB (in Main profile)
static void vc1_decode_i_blocks (VC1Context *v)
 Decode blocks of I-frame.
static void vc1_decode_i_blocks_adv (VC1Context *v)
 Decode blocks of I-frame for advanced profile.
static void vc1_decode_p_blocks (VC1Context *v)
static void vc1_decode_b_blocks (VC1Context *v)
static void vc1_decode_skip_blocks (VC1Context *v)
static void vc1_decode_blocks (VC1Context *v)
static float get_float_val (GetBitContext *gb)
static void vc1_sprite_parse_transform (VC1Context *v, GetBitContext *gb, float c[7])
static void vc1_parse_sprites (VC1Context *v, GetBitContext *gb)
static av_cold int vc1_decode_init (AVCodecContext *avctx)
 Initialize a VC1/WMV3 decoder.
static int vc1_decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
 Decode a VC1/WMV3 frame.
static av_cold int vc1_decode_end (AVCodecContext *avctx)
 Close a VC1/WMV3 decoder.
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.
static int vc1_decode_i_block (VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)
 Decode intra block in intra frames - should be faster than decode_intra_block.
static int vc1_decode_i_block_adv (VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)
 Decode intra block in intra frames - should be faster than decode_intra_block.
static int vc1_decode_intra_block (VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)
 Decode intra block in inter frames - more generic version than vc1_decode_i_block.
static int vc1_decode_p_block (VC1Context *v, DCTELEM 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.

Variables

static const uint16_t table_mb_intra [64][2]
static const uint16_t vlc_offs []
static const int size_table [6] = { 0, 2, 3, 4, 5, 8 }
static const int offset_table [6] = { 0, 1, 3, 7, 15, 31 }
static const AVProfile profiles []
AVCodec ff_vc1_decoder

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.
#define GET_MVDATA(_dmv_x, _dmv_y)
 Get MV differentials.
static void vc1_pred_mv (VC1Context *v, 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

VC-1 and WMV3 decoder.

Definition in file vc1dec.c.


Define Documentation

#define AC_VLC_BITS   9

Definition at line 47 of file vc1dec.c.

Referenced by vc1_decode_ac_coeff(), and vc1_init_common().

#define DC_VLC_BITS   9

Definition at line 46 of file vc1dec.c.

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

#define GET_MQUANT ( )

Get macroblock-level quantizer scale.

Definition at line 786 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_xHorizontal differential for decoded MV
_dmv_yVertical differential for decoded MV

Definition at line 826 of file vc1dec.c.

Referenced by vc1_decode_b_mb(), and vc1_decode_p_mb().

#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 MB_INTRA_VLC_BITS   9

Definition at line 45 of file vc1dec.c.

Referenced by vc1_decode_i_blocks(), and vc1_decode_i_blocks_adv().

#define transpose (   x)    ((x>>3) | ((x&7)<<3))

Enumeration Type Documentation

enum Imode

Imode types.

Enumerator:
IMODE_RAW 
IMODE_NORM2 
IMODE_DIFF2 
IMODE_NORM6 
IMODE_DIFF6 
IMODE_ROWSKIP 
IMODE_COLSKIP 
IMODE_RAW 
IMODE_NORM2 
IMODE_DIFF2 
IMODE_NORM6 
IMODE_DIFF6 
IMODE_ROWSKIP 
IMODE_COLSKIP 

Definition at line 149 of file vc1dec.c.


Function Documentation

static float get_float_val ( GetBitContext gb) [inline, static]

Definition at line 3282 of file vc1dec.c.

Referenced by vc1_parse_sprites(), and vc1_sprite_parse_transform().

static int median4 ( int  a,
int  b,
int  c,
int  d 
) [inline, static]

Definition at line 627 of file vc1dec.c.

Referenced by vc1_mc_4mv_chroma().

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

Definition at line 1122 of file vc1dec.c.

Referenced by vc1_pred_b_mv().

static av_always_inline void vc1_apply_p_h_loop_filter ( VC1Context v,
int  block_num 
) [static]

Definition at line 2382 of file vc1dec.c.

Referenced by vc1_apply_p_loop_filter().

static void vc1_apply_p_loop_filter ( VC1Context v) [static]

Definition at line 2442 of file vc1dec.c.

Referenced by vc1_decode_p_blocks().

static av_always_inline void vc1_apply_p_v_loop_filter ( VC1Context v,
int  block_num 
) [static]

Definition at line 2318 of file vc1dec.c.

Referenced by vc1_apply_p_loop_filter().

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 1143 of file vc1dec.c.

Referenced by vc1_decode_b_mb().

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

Definition at line 1520 of file vc1dec.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:
vThe VC1 context
lastLast coefficient
skipHow much zero coefficients to skip
valueDecoded AC coefficient value
codingsetset of VLC to decode data
See also:
8.1.3.4

Definition at line 1555 of file vc1dec.c.

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

static void vc1_decode_b_blocks ( VC1Context v) [static]

Definition at line 3171 of file vc1dec.c.

Referenced by vc1_decode_blocks().

static void vc1_decode_b_mb ( VC1Context v) [static]

Decode one B-frame MB (in Main profile)

Definition at line 2703 of file vc1dec.c.

Referenced by vc1_decode_b_blocks().

static void vc1_decode_blocks ( VC1Context v) [static]

Definition at line 3245 of file vc1dec.c.

Referenced by vc1_decode_frame().

static av_cold int vc1_decode_end ( AVCodecContext avctx) [static]

Close a VC1/WMV3 decoder.

Warning:
Initial try at using MpegEncContext stuff

Definition at line 3794 of file vc1dec.c.

static int vc1_decode_frame ( AVCodecContext avctx,
void *  data,
int *  data_size,
AVPacket avpkt 
) [static]

Decode a VC1/WMV3 frame.

Todo:
TODO: Handle VC-1 IDUs (Transport level?)

Definition at line 3573 of file vc1dec.c.

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

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

Parameters:
vVC1Context
blockblock to decode
[in]nsubblock index
codedare AC coeffs present or not
codingsetset of VLC to decode data

Definition at line 1620 of file vc1dec.c.

Referenced by vc1_decode_i_blocks().

static int vc1_decode_i_block_adv ( VC1Context v,
DCTELEM  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:
vVC1Context
blockblock to decode
[in]nsubblock number
codedare AC coeffs present or not
codingsetset of VLC to decode data
mquantquantizer value for this macroblock

Definition at line 1786 of file vc1dec.c.

Referenced by vc1_decode_i_blocks_adv().

static void vc1_decode_i_blocks ( VC1Context v) [static]

Decode blocks of I-frame.

Definition at line 2847 of file vc1dec.c.

Referenced by vc1_decode_blocks().

static void vc1_decode_i_blocks_adv ( VC1Context v) [static]

Decode blocks of I-frame for advanced profile.

Definition at line 2978 of file vc1dec.c.

Referenced by vc1_decode_blocks().

static av_cold int vc1_decode_init ( AVCodecContext avctx) [static]

Initialize a VC1/WMV3 decoder.

Todo:

TODO: Handle VC-1 IDUs (Transport level?)

TODO: Decypher remaining bits in extra_data

Definition at line 3396 of file vc1dec.c.

static int vc1_decode_intra_block ( VC1Context v,
DCTELEM  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:
vVC1Context
blockblock to decode
[in]nsubblock index
codedare AC coeffs present or not
mquantblock quantizer
codingsetset of VLC to decode data

Definition at line 1981 of file vc1dec.c.

Referenced by vc1_decode_b_mb(), and vc1_decode_p_mb().

static int vc1_decode_p_block ( VC1Context v,
DCTELEM  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 2173 of file vc1dec.c.

Referenced by vc1_decode_b_mb(), and vc1_decode_p_mb().

static void vc1_decode_p_blocks ( VC1Context v) [static]

Definition at line 3103 of file vc1dec.c.

Referenced by vc1_decode_blocks().

static int vc1_decode_p_mb ( VC1Context v) [static]

Decode one P-frame MB (in Simple/Main profile)

Definition at line 2469 of file vc1dec.c.

Referenced by vc1_decode_p_blocks().

static void vc1_decode_skip_blocks ( VC1Context v) [static]

Definition at line 3226 of file vc1dec.c.

Referenced by vc1_decode_blocks().

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:
sMpegEncContext
overlapflag indicating that overlap filtering is used
pqinteger part of picture quantizer
[in]nblock index in the current MB
dc_val_ptrPointer to DC predictor
dir_ptrPrediction direction for use in AC prediction

Definition at line 1385 of file vc1dec.c.

Referenced by vc1_decode_i_block().

static int vc1_init_common ( VC1Context v) [static]

Init VC-1 specific tables and VC1Context members.

Parameters:
vThe VC1Context to initialize
Returns:
Status

Definition at line 62 of file vc1dec.c.

Referenced by vc1_decode_init().

static void vc1_interp_mc ( VC1Context v) [static]

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

Definition at line 1007 of file vc1dec.c.

Referenced by vc1_b_mc().

static void vc1_loop_filter_iblk ( VC1Context v,
int  pq 
) [static]

Definition at line 229 of file vc1dec.c.

Referenced by vc1_decode_b_blocks(), and vc1_decode_i_blocks().

static void vc1_loop_filter_iblk_delayed ( VC1Context v,
int  pq 
) [static]

Definition at line 256 of file vc1dec.c.

Referenced by vc1_decode_i_blocks_adv().

static void vc1_mc_1mv ( VC1Context v,
int  dir 
) [static]

Do motion compensation over 1 macroblock Mostly adapted hpel_motion and qpel_motion from mpegvideo.c.

Definition at line 404 of file vc1dec.c.

Referenced by vc1_b_mc(), and vc1_decode_p_mb().

static void vc1_mc_4mv_chroma ( VC1Context v) [static]

Do motion compensation for 4-MV macroblock - both chroma blocks.

Definition at line 641 of file vc1dec.c.

Referenced by vc1_decode_p_mb().

static void vc1_mc_4mv_luma ( VC1Context v,
int  n 
) [static]

Do motion compensation for 4-MV macroblock - luminance block.

Definition at line 555 of file vc1dec.c.

Referenced by vc1_decode_p_mb().

static void vc1_parse_sprites ( VC1Context v,
GetBitContext gb 
) [static]

Definition at line 3322 of file vc1dec.c.

Referenced by vc1_decode_frame().

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 1167 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:
sMpegEncContext
overlapflag indicating that overlap filtering is used
pqinteger part of picture quantizer
[in]nblock index in the current MB
a_availflag indicating top block availability
c_availflag indicating left block availability
dc_val_ptrPointer to DC predictor
dir_ptrPrediction direction for use in AC prediction

Definition at line 1449 of file vc1dec.c.

Referenced by vc1_decode_i_block_adv(), and vc1_decode_intra_block().

static void vc1_pred_mv ( VC1Context v,
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 871 of file vc1dec.c.

Referenced by vc1_decode_p_mb().

static void vc1_put_signed_blocks_clamped ( VC1Context v) [static]

Definition at line 163 of file vc1dec.c.

Referenced by vc1_decode_i_blocks_adv().

static void vc1_smooth_overlap_filter_iblk ( VC1Context v) [static]

Definition at line 324 of file vc1dec.c.

Referenced by vc1_decode_i_blocks_adv().

static void vc1_sprite_parse_transform ( VC1Context v,
GetBitContext gb,
float  c[7] 
) [static]

Definition at line 3287 of file vc1dec.c.

Referenced by vc1_parse_sprites().


Variable Documentation

Initial value:

Definition at line 3823 of file vc1dec.c.

const int offset_table[6] = { 0, 1, 3, 7, 15, 31 } [static]

Definition at line 2316 of file vc1dec.c.

Referenced by seq_parse_frame_data().

const AVProfile profiles[] [static]
Initial value:
 {
    { FF_PROFILE_VC1_SIMPLE,   "Simple"   },
    { FF_PROFILE_VC1_MAIN,     "Main"     },
    { FF_PROFILE_VC1_COMPLEX,  "Complex"  },
    { FF_PROFILE_VC1_ADVANCED, "Advanced" },
    { FF_PROFILE_UNKNOWN },
}

Definition at line 3815 of file vc1dec.c.

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

Definition at line 2315 of file vc1dec.c.

const uint16_t table_mb_intra[64][2] [static]

Definition at line 48 of file vc1dec.c.

const uint16_t vlc_offs[] [static]
Initial value:
 {
       0,   520,   552,   616,  1128,  1160, 1224, 1740, 1772, 1836, 1900, 2436,
    2986,  3050,  3610,  4154,  4218,  4746, 5326, 5390, 5902, 6554, 7658, 8620,
    9262, 10202, 10756, 11310, 12228, 15078
}

Definition at line 51 of file vc1dec.c.

Referenced by vc1_init_common().