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

#include "libavutil/intfloat.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "mss12.h"

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, int 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, int stride, int 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, int stride, uint8_t mask, int 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

enum SplitMode

Enumerator:

SPLIT_VERT
SPLIT_HOR
SPLIT_NONE

Definition at line 31 of file mss12.c.

enum ContextDirection

Enumerator:

TOP_LEFT
TOP
TOP_RIGHT
LEFT

Definition at line 39 of file mss12.c.

Function Documentation

static int model_calc_threshold ( Model * m )

static

Definition at line 46 of file mss12.c.

Referenced by model_rescale_weights().

static void model_reset ( Model * m )

static

Definition at line 56 of file mss12.c.

Referenced by ff_mss12_slicecontext_reset().

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

static

Definition at line 69 of file mss12.c.

Referenced by pixctx_init(), and slicecontext_init().

static void model_rescale_weights ( Model * m )

static

Definition at line 76 of file mss12.c.

Referenced by ff_mss12_model_update().

void ff_mss12_model_update	(	Model *	m,
		int	val
	)

Definition at line 93 of file mss12.c.

static void pixctx_reset ( PixContext * ctx )

static

Definition at line 117 of file mss12.c.

Referenced by ff_mss12_slicecontext_reset().

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

static

Definition at line 138 of file mss12.c.

Referenced by slicecontext_init().

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

static

Definition at line 157 of file mss12.c.

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

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

static

Definition at line 197 of file mss12.c.

Referenced by decode_region(), and decode_region_masked().

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

static

Definition at line 290 of file mss12.c.

Referenced by decode_region_inter(), and decode_region_intra().

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

static

Definition at line 318 of file mss12.c.

Referenced by decode_region_inter(), and decode_region_masked().

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

static

Definition at line 334 of file mss12.c.

Referenced by decode_region_inter(), and decode_region_masked().

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