mss12.c File Reference

Common functions for Microsoft Screen 1 and 2. More...

#include <inttypes.h>
#include "libavutil/intfloat.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "mss12.h"

Go to the source code of this file.

Enumerations
enum	SplitMode { SPLIT_VERT = 0, SPLIT_HOR, SPLIT_NONE }
enum	ContextDirection { TOP_LEFT = 0, TOP, TOP_RIGHT, LEFT }

Functions
static int	model_calc_threshold (Model *m)
static void	model_reset (Model *m)
static av_cold void	model_init (Model *m, int num_syms, int thr_weight)
static void	model_rescale_weights (Model *m)
void	ff_mss12_model_update (Model *m, int val)
static void	pixctx_reset (PixContext *ctx)
static av_cold void	pixctx_init (PixContext *ctx, int cache_size, int full_model_syms, int special_initial_cache)
static av_always_inline int	decode_pixel (ArithCoder *acoder, PixContext *pctx, uint8_t *ngb, int num_ngb, int any_ngb)
static int	decode_pixel_in_context (ArithCoder *acoder, PixContext *pctx, uint8_t *src, ptrdiff_t stride, int x, int y, int has_right)
static int	decode_region (ArithCoder *acoder, uint8_t *dst, uint8_t *rgb_pic, int x, int y, int width, int height, ptrdiff_t stride, ptrdiff_t rgb_stride, PixContext *pctx, const uint32_t *pal)
static void	copy_rectangles (MSS12Context const *c, int x, int y, int width, int height)
static int	motion_compensation (MSS12Context const *c, int x, int y, int width, int height)
static int	decode_region_masked (MSS12Context const *c, ArithCoder *acoder, uint8_t *dst, ptrdiff_t stride, uint8_t *mask, ptrdiff_t mask_stride, int x, int y, int width, int height, PixContext *pctx)
static av_cold void	slicecontext_init (SliceContext *sc, int version, int full_model_syms)
void	ff_mss12_slicecontext_reset (SliceContext *sc)
static int	decode_pivot (SliceContext *sc, ArithCoder *acoder, int base)
static int	decode_region_intra (SliceContext *sc, ArithCoder *acoder, int x, int y, int width, int height)
static int	decode_region_inter (SliceContext *sc, ArithCoder *acoder, int x, int y, int width, int height)
int	ff_mss12_decode_rect (SliceContext *sc, ArithCoder *acoder, int x, int y, int width, int height)
av_cold int	ff_mss12_decode_init (MSS12Context *c, int version, SliceContext *sc1, SliceContext *sc2)
av_cold int	ff_mss12_decode_end (MSS12Context *c)

Variables
static const int	sec_order_sizes [4] = { 1, 7, 6, 1 }

Detailed Description

Common functions for Microsoft Screen 1 and 2.

Definition in file mss12.c.

Enumeration Type Documentation

SplitMode

enum SplitMode

Enumerator
SPLIT_VERT
SPLIT_HOR
SPLIT_NONE

Definition at line 33 of file mss12.c.

ContextDirection

enum ContextDirection

Enumerator
TOP_LEFT
TOP
TOP_RIGHT
LEFT

Definition at line 41 of file mss12.c.

Function Documentation

model_calc_threshold()

static int model_calc_threshold ( Model *  m )

static

Definition at line 48 of file mss12.c.

Referenced by model_rescale_weights().

model_reset()

static void model_reset ( Model *  m )

static

Definition at line 58 of file mss12.c.

Referenced by ff_mss12_slicecontext_reset().

model_init()

static av_cold void model_init ( Model *  m, int  num_syms, int  thr_weight  )

static

Definition at line 71 of file mss12.c.

Referenced by pixctx_init(), and slicecontext_init().

model_rescale_weights()

static void model_rescale_weights ( Model *  m )

static

Definition at line 78 of file mss12.c.

Referenced by ff_mss12_model_update().

ff_mss12_model_update()

void ff_mss12_model_update	(	Model *	m,
		int	val
	)

Definition at line 95 of file mss12.c.

pixctx_reset()

static void pixctx_reset ( PixContext *  ctx )

static

Definition at line 119 of file mss12.c.

Referenced by ff_mss12_slicecontext_reset().

pixctx_init()

static av_cold void pixctx_init ( PixContext *  ctx, int  cache_size, int  full_model_syms, int  special_initial_cache  )

static

Definition at line 140 of file mss12.c.

Referenced by slicecontext_init().

decode_pixel()

static av_always_inline int decode_pixel ( ArithCoder *  acoder, PixContext *  pctx, uint8_t *  ngb, int  num_ngb, int  any_ngb  )

static

Definition at line 159 of file mss12.c.

Referenced by decode_pixel_in_context(), decode_region(), decode_region_inter(), decode_region_intra(), and decode_region_masked().

decode_pixel_in_context()

static int decode_pixel_in_context ( ArithCoder *  acoder, PixContext *  pctx, uint8_t *  src, ptrdiff_t  stride, int  x, int  y, int  has_right  )

static

Definition at line 199 of file mss12.c.

Referenced by decode_region(), and decode_region_masked().

decode_region()

static int decode_region ( ArithCoder *  acoder, uint8_t *  dst, uint8_t *  rgb_pic, int  x, int  y, int  width, int  height, ptrdiff_t  stride, ptrdiff_t  rgb_stride, PixContext *  pctx, const uint32_t *  pal  )

static

Definition at line 292 of file mss12.c.

Referenced by decode_region_inter(), and decode_region_intra().

copy_rectangles()

static void copy_rectangles ( MSS12Context const *  c, int  x, int  y, int  width, int  height  )

static

Definition at line 321 of file mss12.c.

Referenced by decode_region_inter(), and decode_region_masked().

motion_compensation()

static int motion_compensation ( MSS12Context const *  c, int  x, int  y, int  width, int  height  )

static

Definition at line 337 of file mss12.c.

Referenced by decode_region_inter(), and decode_region_masked().

decode_region_masked()

static int decode_region_masked ( MSS12Context const *  c, ArithCoder *  acoder, uint8_t *  dst, ptrdiff_t  stride, uint8_t *  mask, ptrdiff_t  mask_stride, int  x, int  y, int  width, int  height, PixContext *  pctx  )

static

Definition at line 371 of file mss12.c.

Referenced by decode_region_inter().

slicecontext_init()

static av_cold void slicecontext_init ( SliceContext *  sc, int  version, int  full_model_syms  )

static

Definition at line 414 of file mss12.c.

Referenced by ff_mss12_decode_init().

ff_mss12_slicecontext_reset()

void ff_mss12_slicecontext_reset

(

SliceContext *

sc

)

Definition at line 429 of file mss12.c.

Referenced by mss1_decode_frame(), and mss2_decode_frame().

decode_pivot()

static int decode_pivot ( SliceContext *  sc, ArithCoder *  acoder, int  base  )

static

Definition at line 440 of file mss12.c.

Referenced by ff_mss12_decode_rect().

decode_region_intra()

static int decode_region_intra ( SliceContext *  sc, ArithCoder *  acoder, int  x, int  y, int  width, int  height  )

static

Definition at line 460 of file mss12.c.

Referenced by decode_region_inter(), and ff_mss12_decode_rect().

decode_region_inter()

static int decode_region_inter ( SliceContext *  sc, ArithCoder *  acoder, int  x, int  y, int  width, int  height  )

static

Definition at line 492 of file mss12.c.

Referenced by ff_mss12_decode_rect().

ff_mss12_decode_rect()

int ff_mss12_decode_rect	(	SliceContext *	sc,
		ArithCoder *	acoder,
		int	x,
		int	y,
		int	width,
		int	height
	)

Definition at line 529 of file mss12.c.

Referenced by ff_mss12_decode_rect(), mss1_decode_frame(), and mss2_decode_frame().

ff_mss12_decode_init()

av_cold int ff_mss12_decode_init	(	MSS12Context *	c,
		int	version,
		SliceContext *	sc1,
		SliceContext *	sc2
	)

Definition at line 565 of file mss12.c.

Referenced by mss1_decode_init(), and mss2_decode_init().

ff_mss12_decode_end()

av_cold int ff_mss12_decode_end

(

MSS12Context *

c

)

Definition at line 677 of file mss12.c.

Referenced by mss1_decode_end(), and mss2_decode_end().

Variable Documentation

sec_order_sizes

const int sec_order_sizes[4] = { 1, 7, 6, 1 }

static

Definition at line 39 of file mss12.c.

Referenced by pixctx_init().