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cavs.c File Reference

Chinese AVS video (AVS1-P2, JiZhun profile) decoder. More...

#include "avcodec.h"
#include "get_bits.h"
#include "golomb.h"
#include "mathops.h"
#include "cavs.h"

Go to the source code of this file.

Macros

#define SET_PARAMS
 
#define LOWPASS(ARRAY, INDEX)   ((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2)
 

Functions

static int get_bs (cavs_vector *mvP, cavs_vector *mvQ, int b)
 
void ff_cavs_filter (AVSContext *h, enum cavs_mb mb_type)
 in-loop deblocking filter for a single macroblock
 
void ff_cavs_load_intra_pred_luma (AVSContext *h, uint8_t *top, uint8_t **left, int block)
 
void ff_cavs_load_intra_pred_chroma (AVSContext *h)
 
static void intra_pred_vert (uint8_t *d, uint8_t *top, uint8_t *left, int stride)
 
static void intra_pred_horiz (uint8_t *d, uint8_t *top, uint8_t *left, int stride)
 
static void intra_pred_dc_128 (uint8_t *d, uint8_t *top, uint8_t *left, int stride)
 
static void intra_pred_plane (uint8_t *d, uint8_t *top, uint8_t *left, int stride)
 
static void intra_pred_lp (uint8_t *d, uint8_t *top, uint8_t *left, int stride)
 
static void intra_pred_down_left (uint8_t *d, uint8_t *top, uint8_t *left, int stride)
 
static void intra_pred_down_right (uint8_t *d, uint8_t *top, uint8_t *left, int stride)
 
static void intra_pred_lp_left (uint8_t *d, uint8_t *top, uint8_t *left, int stride)
 
static void intra_pred_lp_top (uint8_t *d, uint8_t *top, uint8_t *left, int stride)
 
static void modify_pred (const int8_t *mod_table, int *mode)
 
void ff_cavs_modify_mb_i (AVSContext *h, int *pred_mode_uv)
 
static void mc_dir_part (AVSContext *h, AVFrame *pic, int chroma_height, int delta, int list, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int src_x_offset, int src_y_offset, qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op, cavs_vector *mv)
 
static void mc_part_std (AVSContext *h, int chroma_height, int delta, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int x_offset, int y_offset, qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put, qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg, cavs_vector *mv)
 
void ff_cavs_inter (AVSContext *h, enum cavs_mb mb_type)
 
static void scale_mv (AVSContext *h, int *d_x, int *d_y, cavs_vector *src, int distp)
 
static void mv_pred_median (AVSContext *h, cavs_vector *mvP, cavs_vector *mvA, cavs_vector *mvB, cavs_vector *mvC)
 
void ff_cavs_mv (AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC, enum cavs_mv_pred mode, enum cavs_block size, int ref)
 
void ff_cavs_init_mb (AVSContext *h)
 initialise predictors for motion vectors and intra prediction
 
int ff_cavs_next_mb (AVSContext *h)
 save predictors for later macroblocks and increase macroblock address
 
int ff_cavs_init_pic (AVSContext *h)
 
void ff_cavs_init_top_lines (AVSContext *h)
 some predictions require data from the top-neighbouring macroblock.
 
av_cold int ff_cavs_init (AVCodecContext *avctx)
 
av_cold int ff_cavs_end (AVCodecContext *avctx)
 

Variables

static const uint8_t alpha_tab [64]
 
static const uint8_t beta_tab [64]
 
static const uint8_t tc_tab [64]
 
static const cavs_vector un_mv = { 0, 0, 1, NOT_AVAIL }
 mark block as unavailable, i.e.
 
static const int8_t left_modifier_l [8] = { 0, -1, 6, -1, -1, 7, 6, 7 }
 
static const int8_t top_modifier_l [8] = { -1, 1, 5, -1, -1, 5, 7, 7 }
 
static const int8_t left_modifier_c [7] = { 5, -1, 2, -1, 6, 5, 6 }
 
static const int8_t top_modifier_c [7] = { 4, 1, -1, -1, 4, 6, 6 }
 

Detailed Description

Chinese AVS video (AVS1-P2, JiZhun profile) decoder.

Author
Stefan Gehrer stefa.nosp@m.n.ge.nosp@m.hrer@.nosp@m.gmx..nosp@m.de

Definition in file cavs.c.

Macro Definition Documentation

#define SET_PARAMS
Value:
alpha = alpha_tab[av_clip(qp_avg + h->alpha_offset, 0, 63)]; \
beta = beta_tab[av_clip(qp_avg + h->beta_offset, 0, 63)]; \
tc = tc_tab[av_clip(qp_avg + h->alpha_offset, 0, 63)];

Definition at line 88 of file cavs.c.

Referenced by ff_cavs_filter().

#define LOWPASS (   ARRAY,
  INDEX 
)    ((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2)

Definition at line 292 of file cavs.c.

Referenced by intra_pred_down_left(), intra_pred_down_right(), intra_pred_lp(), intra_pred_lp_left(), and intra_pred_lp_top().

Function Documentation

static int get_bs ( cavs_vector *  mvP,
cavs_vector *  mvQ,
int  b 
)
inlinestatic

Definition at line 70 of file cavs.c.

Referenced by ff_cavs_filter().

void ff_cavs_filter ( AVSContext *  h,
enum cavs_mb  mb_type 
)

in-loop deblocking filter for a single macroblock

boundary strength (bs) mapping:

–4—5– 0 2 | | 6 | 7 |

1 3 |

Definition at line 105 of file cavs.c.

Referenced by decode_mb_b(), decode_mb_i(), and decode_mb_p().

void ff_cavs_load_intra_pred_luma ( AVSContext *  h,
uint8_t *  top,
uint8_t **  left,
int  block 
)

Definition at line 177 of file cavs.c.

Referenced by decode_mb_i().

void ff_cavs_load_intra_pred_chroma ( AVSContext *  h)

Definition at line 228 of file cavs.c.

Referenced by decode_mb_i().

static void intra_pred_vert ( uint8_t *  d,
uint8_t *  top,
uint8_t *  left,
int  stride 
)
static

Definition at line 246 of file cavs.c.

Referenced by ff_cavs_init().

static void intra_pred_horiz ( uint8_t *  d,
uint8_t *  top,
uint8_t *  left,
int  stride 
)
static

Definition at line 255 of file cavs.c.

Referenced by ff_cavs_init().

static void intra_pred_dc_128 ( uint8_t *  d,
uint8_t *  top,
uint8_t *  left,
int  stride 
)
static

Definition at line 265 of file cavs.c.

Referenced by ff_cavs_init().

static void intra_pred_plane ( uint8_t *  d,
uint8_t *  top,
uint8_t *  left,
int  stride 
)
static

Definition at line 273 of file cavs.c.

Referenced by ff_cavs_init().

static void intra_pred_lp ( uint8_t *  d,
uint8_t *  top,
uint8_t *  left,
int  stride 
)
static

Definition at line 295 of file cavs.c.

Referenced by ff_cavs_init().

static void intra_pred_down_left ( uint8_t *  d,
uint8_t *  top,
uint8_t *  left,
int  stride 
)
static

Definition at line 303 of file cavs.c.

Referenced by ff_cavs_init().

static void intra_pred_down_right ( uint8_t *  d,
uint8_t *  top,
uint8_t *  left,
int  stride 
)
static

Definition at line 311 of file cavs.c.

Referenced by ff_cavs_init().

static void intra_pred_lp_left ( uint8_t *  d,
uint8_t *  top,
uint8_t *  left,
int  stride 
)
static

Definition at line 324 of file cavs.c.

Referenced by ff_cavs_init().

static void intra_pred_lp_top ( uint8_t *  d,
uint8_t *  top,
uint8_t *  left,
int  stride 
)
static

Definition at line 332 of file cavs.c.

Referenced by ff_cavs_init().

static void modify_pred ( const int8_t *  mod_table,
int *  mode 
)
inlinestatic

Definition at line 342 of file cavs.c.

Referenced by ff_cavs_modify_mb_i().

void ff_cavs_modify_mb_i ( AVSContext *  h,
int *  pred_mode_uv 
)

Definition at line 351 of file cavs.c.

Referenced by decode_mb_i().

static void mc_dir_part ( AVSContext *  h,
AVFrame *  pic,
int  chroma_height,
int  delta,
int  list,
uint8_t *  dest_y,
uint8_t *  dest_cb,
uint8_t *  dest_cr,
int  src_x_offset,
int  src_y_offset,
qpel_mc_func *  qpix_op,
h264_chroma_mc_func  chroma_op,
cavs_vector *  mv 
)
inlinestatic

Definition at line 378 of file cavs.c.

Referenced by mc_part_std().

static void mc_part_std ( AVSContext *  h,
int  chroma_height,
int  delta,
uint8_t *  dest_y,
uint8_t *  dest_cb,
uint8_t *  dest_cr,
int  x_offset,
int  y_offset,
qpel_mc_func *  qpix_put,
h264_chroma_mc_func  chroma_put,
qpel_mc_func *  qpix_avg,
h264_chroma_mc_func  chroma_avg,
cavs_vector *  mv 
)
inlinestatic

Definition at line 430 of file cavs.c.

Referenced by ff_cavs_inter(), and mc_part().

void ff_cavs_inter ( AVSContext *  h,
enum cavs_mb  mb_type 
)

Definition at line 463 of file cavs.c.

Referenced by decode_mb_b(), and decode_mb_p().

static void scale_mv ( AVSContext *  h,
int *  d_x,
int *  d_y,
cavs_vector *  src,
int  distp 
)
inlinestatic

Definition at line 500 of file cavs.c.

Referenced by mv_pred_median().

static void mv_pred_median ( AVSContext *  h,
cavs_vector *  mvP,
cavs_vector *  mvA,
cavs_vector *  mvB,
cavs_vector *  mvC 
)
inlinestatic

Definition at line 507 of file cavs.c.

Referenced by ff_cavs_mv().

void ff_cavs_mv ( AVSContext *  h,
enum cavs_mv_loc  nP,
enum cavs_mv_loc  nC,
enum cavs_mv_pred  mode,
enum cavs_block  size,
int  ref 
)

Definition at line 533 of file cavs.c.

Referenced by decode_mb_b(), and decode_mb_p().

void ff_cavs_init_mb ( AVSContext *  h)

initialise predictors for motion vectors and intra prediction

Definition at line 586 of file cavs.c.

Referenced by decode_mb_b(), decode_mb_i(), and decode_mb_p().

int ff_cavs_next_mb ( AVSContext *  h)

save predictors for later macroblocks and increase macroblock address

Returns
0 if end of frame is reached, 1 otherwise

Definition at line 626 of file cavs.c.

Referenced by decode_pic().

int ff_cavs_init_pic ( AVSContext *  h)

Definition at line 670 of file cavs.c.

Referenced by decode_pic().

void ff_cavs_init_top_lines ( AVSContext *  h)

some predictions require data from the top-neighbouring macroblock.

this data has to be stored for one complete row of macroblocks and this storage space is allocated here

Definition at line 705 of file cavs.c.

Referenced by decode_seq_header().

av_cold int ff_cavs_init ( AVCodecContext *  avctx)

Definition at line 721 of file cavs.c.

av_cold int ff_cavs_end ( AVCodecContext *  avctx)

Definition at line 764 of file cavs.c.

Referenced by ff_cavs_init().

Variable Documentation

const uint8_t alpha_tab[64]
static
Initial value:
= {
0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3,
4, 4, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 20,
22, 24, 26, 28, 30, 33, 33, 35, 35, 36, 37, 37, 39, 39, 42, 44,
46, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64
}

Definition at line 34 of file cavs.c.

const uint8_t beta_tab[64]
static
Initial value:
= {
0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,
2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6,
6, 7, 7, 7, 8, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 27
}

Definition at line 41 of file cavs.c.

const uint8_t tc_tab[64]
static
Initial value:
= {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,
2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4,
5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9
}

Definition at line 48 of file cavs.c.

const cavs_vector un_mv = { 0, 0, 1, NOT_AVAIL }
static

mark block as unavailable, i.e.

out of picture or not yet decoded

Definition at line 57 of file cavs.c.

Referenced by ff_cavs_init(), ff_cavs_init_mb(), and ff_cavs_mv().

const int8_t left_modifier_l[8] = { 0, -1, 6, -1, -1, 7, 6, 7 }
static

Definition at line 59 of file cavs.c.

Referenced by ff_cavs_modify_mb_i().

const int8_t top_modifier_l[8] = { -1, 1, 5, -1, -1, 5, 7, 7 }
static

Definition at line 60 of file cavs.c.

Referenced by ff_cavs_modify_mb_i().

const int8_t left_modifier_c[7] = { 5, -1, 2, -1, 6, 5, 6 }
static

Definition at line 61 of file cavs.c.

Referenced by ff_cavs_modify_mb_i().

const int8_t top_modifier_c[7] = { 4, 1, -1, -1, 4, 6, 6 }
static

Definition at line 62 of file cavs.c.

Referenced by ff_cavs_modify_mb_i().

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