libavcodec/rv40.c File Reference

RV40 decoder. More...

#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "golomb.h"
#include "rv34.h"
#include "rv40vlc2.h"
#include "rv40data.h"

Go to the source code of this file.

Defines

#define CLIP_SYMM(a, b)   av_clip(a, -(b), b)
#define MASK_CUR   0x0001
#define MASK_RIGHT   0x0008
#define MASK_BOTTOM   0x0010
#define MASK_TOP   0x1000
#define MASK_Y_TOP_ROW   0x000F
#define MASK_Y_LAST_ROW   0xF000
#define MASK_Y_LEFT_COL   0x1111
#define MASK_Y_RIGHT_COL   0x8888
#define MASK_C_TOP_ROW   0x0003
#define MASK_C_LAST_ROW   0x000C
#define MASK_C_LEFT_COL   0x0005
#define MASK_C_RIGHT_COL   0x000A

Enumerations

enum  RV40BlockPos { POS_CUR, POS_TOP, POS_LEFT, POS_BOTTOM }

Functions

static av_cold void rv40_init_tables (void)
 Initialize all tables.
static int get_dimension (GetBitContext *gb, const int *dim)
 Get stored dimension from bitstream.
static void rv40_parse_picture_size (GetBitContext *gb, int *w, int *h)
 Get encoded picture size - usually this is called from rv40_parse_slice_header.
static int rv40_parse_slice_header (RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
static int rv40_decode_intra_types (RV34DecContext *r, GetBitContext *gb, int8_t *dst)
 Decode 4x4 intra types array.
static int rv40_decode_mb_info (RV34DecContext *r)
 Decode macroblock information.
static void rv40_weak_loop_filter (uint8_t *src, const int step, const int filter_p1, const int filter_q1, const int alpha, const int beta, const int lim_p0q0, const int lim_q1, const int lim_p1, const int diff_p1p0, const int diff_q1q0, const int diff_p1p2, const int diff_q1q2)
 weaker deblocking very similar to the one described in 4.4.2 of JVT-A003r1
static av_always_inline void rv40_adaptive_loop_filter (uint8_t *src, const int step, const int stride, const int dmode, const int lim_q1, const int lim_p1, const int alpha, const int beta, const int beta2, const int chroma, const int edge)
static void rv40_v_loop_filter (uint8_t *src, int stride, int dmode, int lim_q1, int lim_p1, int alpha, int beta, int beta2, int chroma, int edge)
static void rv40_h_loop_filter (uint8_t *src, int stride, int dmode, int lim_q1, int lim_p1, int alpha, int beta, int beta2, int chroma, int edge)
static void rv40_loop_filter (RV34DecContext *r, int row)
 RV40 loop filtering function.
static av_cold int rv40_decode_init (AVCodecContext *avctx)
 Initialize decoder.

Variables

static VLC aic_top_vlc
static VLC aic_mode1_vlc [AIC_MODE1_NUM]
static VLC aic_mode2_vlc [AIC_MODE2_NUM]
static VLC ptype_vlc [NUM_PTYPE_VLCS]
static VLC btype_vlc [NUM_BTYPE_VLCS]
static const int16_t mode2_offs []
static const int neighbour_offs_x [4] = { 0, 0, -1, 0 }
static const int neighbour_offs_y [4] = { 0, -1, 0, 1 }
AVCodec ff_rv40_decoder


Detailed Description

RV40 decoder.

Definition in file rv40.c.


Define Documentation

#define CLIP_SYMM ( a,
 )     av_clip(a, -(b), b)

Definition at line 277 of file rv40.c.

Referenced by rv40_weak_loop_filter().

#define MASK_BOTTOM   0x0010

Definition at line 428 of file rv40.c.

Referenced by rv40_loop_filter().

#define MASK_C_LAST_ROW   0x000C

Definition at line 435 of file rv40.c.

Referenced by rv40_loop_filter().

#define MASK_C_LEFT_COL   0x0005

Definition at line 436 of file rv40.c.

Referenced by rv40_loop_filter().

#define MASK_C_RIGHT_COL   0x000A

Definition at line 437 of file rv40.c.

Referenced by rv40_loop_filter().

#define MASK_C_TOP_ROW   0x0003

Definition at line 434 of file rv40.c.

Referenced by rv40_loop_filter().

#define MASK_CUR   0x0001

Definition at line 426 of file rv40.c.

Referenced by rv40_loop_filter().

#define MASK_RIGHT   0x0008

Definition at line 427 of file rv40.c.

Referenced by rv40_loop_filter().

#define MASK_TOP   0x1000

Definition at line 429 of file rv40.c.

Referenced by rv40_loop_filter().

#define MASK_Y_LAST_ROW   0xF000

Definition at line 431 of file rv40.c.

Referenced by rv40_loop_filter().

#define MASK_Y_LEFT_COL   0x1111

Definition at line 432 of file rv40.c.

Referenced by rv40_loop_filter().

#define MASK_Y_RIGHT_COL   0x8888

Definition at line 433 of file rv40.c.

Referenced by rv40_loop_filter().

#define MASK_Y_TOP_ROW   0x000F

Definition at line 430 of file rv40.c.

Referenced by rv40_loop_filter().


Enumeration Type Documentation

Enumerator:
POS_CUR 
POS_TOP 
POS_LEFT 
POS_BOTTOM 

Definition at line 419 of file rv40.c.


Function Documentation

static int get_dimension ( GetBitContext gb,
const int *  dim 
) [static]

Get stored dimension from bitstream.

If the width/height is the standard one then it's coded as a 3-bit index. Otherwise it is coded as escaped 8-bit portions.

Definition at line 104 of file rv40.c.

Referenced by rv40_parse_picture_size().

static av_always_inline void rv40_adaptive_loop_filter ( uint8_t *  src,
const int  step,
const int  stride,
const int  dmode,
const int  lim_q1,
const int  lim_p1,
const int  alpha,
const int  beta,
const int  beta2,
const int  chroma,
const int  edge 
) [static]

Definition at line 315 of file rv40.c.

Referenced by rv40_h_loop_filter(), and rv40_v_loop_filter().

static av_cold int rv40_decode_init ( AVCodecContext avctx  )  [static]

Initialize decoder.

Definition at line 657 of file rv40.c.

static int rv40_decode_intra_types ( RV34DecContext r,
GetBitContext gb,
int8_t *  dst 
) [static]

Decode 4x4 intra types array.

Definition at line 161 of file rv40.c.

Referenced by rv40_decode_init().

static int rv40_decode_mb_info ( RV34DecContext r  )  [static]

Decode macroblock information.

Definition at line 224 of file rv40.c.

Referenced by rv40_decode_init().

static void rv40_h_loop_filter ( uint8_t *  src,
int  stride,
int  dmode,
int  lim_q1,
int  lim_p1,
int  alpha,
int  beta,
int  beta2,
int  chroma,
int  edge 
) [static]

Definition at line 412 of file rv40.c.

Referenced by rv40_loop_filter().

static av_cold void rv40_init_tables ( void   )  [static]

Initialize all tables.

Definition at line 50 of file rv40.c.

Referenced by rv40_decode_init().

static void rv40_loop_filter ( RV34DecContext r,
int  row 
) [static]

RV40 loop filtering function.

< current macroblock and its neighbours types

flags indicating that macroblock can be filtered with strong filter it is set only for intra coded MB and MB with DCs coded separately

< MB filter clipping value calculated from filtering strength

coded block patterns for luma part of current macroblock and its neighbours Format: LSB corresponds to the top left block, each nibble represents one row of subblocks.

coded block patterns for chroma part of current macroblock and its neighbours Format is the same as for luma with two subblocks in a row.

This mask represents the pattern of luma subblocks that should be filtered in addition to the coded ones because because they lie at the edge of 8x8 block with different enough motion vectors

Definition at line 445 of file rv40.c.

Referenced by rv40_decode_init().

static void rv40_parse_picture_size ( GetBitContext gb,
int *  w,
int *  h 
) [static]

Get encoded picture size - usually this is called from rv40_parse_slice_header.

Definition at line 122 of file rv40.c.

Referenced by rv40_parse_slice_header().

static int rv40_parse_slice_header ( RV34DecContext r,
GetBitContext gb,
SliceInfo si 
) [static]

Definition at line 128 of file rv40.c.

Referenced by rv40_decode_init().

static void rv40_v_loop_filter ( uint8_t *  src,
int  stride,
int  dmode,
int  lim_q1,
int  lim_p1,
int  alpha,
int  beta,
int  beta2,
int  chroma,
int  edge 
) [static]

Definition at line 406 of file rv40.c.

Referenced by rv40_loop_filter().

static void rv40_weak_loop_filter ( uint8_t *  src,
const int  step,
const int  filter_p1,
const int  filter_q1,
const int  alpha,
const int  beta,
const int  lim_p0q0,
const int  lim_q1,
const int  lim_p1,
const int  diff_p1p0,
const int  diff_q1q0,
const int  diff_p1p2,
const int  diff_q1q2 
) [inline, static]

weaker deblocking very similar to the one described in 4.4.2 of JVT-A003r1

Definition at line 281 of file rv40.c.

Referenced by rv40_adaptive_loop_filter().


Variable Documentation

VLC aic_mode1_vlc[AIC_MODE1_NUM] [static]

Definition at line 39 of file rv40.c.

VLC aic_mode2_vlc[AIC_MODE2_NUM] [static]

Definition at line 39 of file rv40.c.

VLC aic_top_vlc [static]

Definition at line 38 of file rv40.c.

VLC btype_vlc[NUM_BTYPE_VLCS] [static]

Definition at line 40 of file rv40.c.

Initial value:

Definition at line 674 of file rv40.c.

const int16_t mode2_offs[] [static]

Initial value:

 {
       0,  614, 1222, 1794, 2410,  3014,  3586,  4202,  4792, 5382, 5966, 6542,
    7138, 7716, 8292, 8864, 9444, 10030, 10642, 11212, 11814
}

Definition at line 42 of file rv40.c.

Referenced by rv40_init_tables().

const int neighbour_offs_x[4] = { 0, 0, -1, 0 } [static]

Definition at line 439 of file rv40.c.

Referenced by rv40_loop_filter().

const int neighbour_offs_y[4] = { 0, -1, 0, 1 } [static]

Definition at line 440 of file rv40.c.

Referenced by rv40_loop_filter().

VLC ptype_vlc[NUM_PTYPE_VLCS] [static]

Definition at line 40 of file rv40.c.


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