vf_xbr.c File Reference

XBR Filter is used for depixelization of image. More...

#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "filters.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	XBRContext
struct	ThreadData
	Used for passing data between threads. More...

Macros
#define	LB_MASK   0x00FEFEFE
#define	RED_BLUE_MASK   0x00FF00FF
#define	GREEN_MASK   0x0000FF00
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	YMASK   0xff0000
#define	UMASK   0x00ff00
#define	VMASK   0x0000ff
#define	ABSDIFF(a, b)
#define	ALPHA_BLEND_128_W(a, b)
#define	ALPHA_BLEND_BASE(a, b, m, s)
#define	ALPHA_BLEND_32_W(a, b)
#define	ALPHA_BLEND_64_W(a, b)
#define	ALPHA_BLEND_192_W(a, b)
#define	ALPHA_BLEND_224_W(a, b)
#define	df(A, B)
#define	eq(A, B)
#define	FILT2(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, N0, N1, N2, N3)
#define	FILT3(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, N0, N1, N2, N3, N4, N5, N6, N7, N8)
#define	FILT4(PE, PI, PH, PF, PG, PC, PD, PB, PA, G5, C4, G0, D0, C1, B1, F4, I4, H5, I5, A0, A1, N15, N14, N11, N3, N7, N10, N13, N12, N9, N6, N2, N1, N5, N8, N4, N0)
#define	XBR_FUNC(size)

Typedefs
typedef int(*	xbrfunc_t) (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)

Functions
	AVFILTER_DEFINE_CLASS (xbr)
static uint32_t	pixel_diff (uint32_t x, uint32_t y, const uint32_t *r2y)
static av_always_inline void	xbr_filter (const ThreadData *td, int jobnr, int nb_jobs, int n)
static int	config_output (AVFilterLink *outlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold int	init (AVFilterContext *ctx)

Variables
static const AVOption	xbr_options []
static const AVFilterPad	xbr_inputs []
static const AVFilterPad	xbr_outputs []
const FFFilter	ff_vf_xbr

Detailed Description

XBR Filter is used for depixelization of image.

This is based on Hyllian's xBR shader.

See also

https://forums.libretro.com/t/xbr-algorithm-tutorial/123

https://github.com/yoyofr/iFBA/blob/master/fba_src/src/intf/video/scalers/xbr.cpp

Definition in file vf_xbr.c.

Macro Definition Documentation

LB_MASK

#define LB_MASK   0x00FEFEFE

Definition at line 37 of file vf_xbr.c.

RED_BLUE_MASK

#define RED_BLUE_MASK   0x00FF00FF

Definition at line 38 of file vf_xbr.c.

GREEN_MASK

#define GREEN_MASK   0x0000FF00

Definition at line 39 of file vf_xbr.c.

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(XBRContext, x)

Definition at line 59 of file vf_xbr.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 60 of file vf_xbr.c.

YMASK

#define YMASK   0xff0000

UMASK

#define UMASK   0x00ff00

VMASK

#define VMASK   0x0000ff

ABSDIFF

#define ABSDIFF	(		a,
			b )

Value:

(abs((int)(a)-(int)(b)))

Referenced by pixel_diff().

ALPHA_BLEND_128_W

#define ALPHA_BLEND_128_W	(		a,
			b )

Value:

((((a) & LB_MASK) >> 1) + (((b) & LB_MASK) >> 1))

Definition at line 83 of file vf_xbr.c.

ALPHA_BLEND_BASE

#define ALPHA_BLEND_BASE	(		a,
			b,
			m,
			s )

Value:

                                      (  (RED_BLUE_MASK & (((a) & RED_BLUE_MASK) + (((((b) & RED_BLUE_MASK) - ((a) & RED_BLUE_MASK)) * (m)) >> (s)))) \
                                      | (GREEN_MASK    & (((a) & GREEN_MASK)    + (((((b) & GREEN_MASK)    - ((a) & GREEN_MASK))    * (m)) >> (s)))))

Definition at line 84 of file vf_xbr.c.

ALPHA_BLEND_32_W

#define ALPHA_BLEND_32_W	(		a,
			b )

Value:

ALPHA_BLEND_BASE(a, b, 1, 3)

Definition at line 86 of file vf_xbr.c.

ALPHA_BLEND_64_W

#define ALPHA_BLEND_64_W	(		a,
			b )

Value:

ALPHA_BLEND_BASE(a, b, 1, 2)

Definition at line 87 of file vf_xbr.c.

ALPHA_BLEND_192_W

#define ALPHA_BLEND_192_W	(		a,
			b )

Value:

ALPHA_BLEND_BASE(a, b, 3, 2)

Definition at line 88 of file vf_xbr.c.

ALPHA_BLEND_224_W

#define ALPHA_BLEND_224_W	(		a,
			b )

Value:

ALPHA_BLEND_BASE(a, b, 7, 3)

Definition at line 89 of file vf_xbr.c.

df

#define df	(		A,
			B )

Value:

pixel_diff(A, B, r2y)

Definition at line 91 of file vf_xbr.c.

Referenced by decoded_frames_flush(), decoded_frames_free(), decoded_frames_get_free(), decoded_frames_pop(), fill_timecode(), filter_slice(), and filter_slice().

eq

#define eq	(		A,
			B )

Value:

(df(A, B) < 155)

Definition at line 92 of file vf_xbr.c.

Referenced by AVFILTER_DEFINE_CLASS(), check_eq(), check_values(), config_props(), ff_eq_init(), ff_eq_init_x86(), filter_frame(), initialize(), process_command(), set_brightness(), set_contrast(), set_gamma(), set_param(), set_saturation(), and uninit().

FILT2

#define FILT2	(		PE,
			PI,
			PH,
			PF,
			PG,
			PC,
			PD,
			PB,
			PA,
			G5,
			C4,
			G0,
			D0,
			C1,
			B1,
			F4,
			I4,
			H5,
			I5,
			A0,
			A1,
			N0,
			N1,
			N2,
			N3 )

Definition at line 94 of file vf_xbr.c.

Referenced by xbr_filter().

FILT3

#define FILT3	(		PE,
			PI,
			PH,
			PF,
			PG,
			PC,
			PD,
			PB,
			PA,
			G5,
			C4,
			G0,
			D0,
			C1,
			B1,
			F4,
			I4,
			H5,
			I5,
			A0,
			A1,
			N0,
			N1,
			N2,
			N3,
			N4,
			N5,
			N6,
			N7,
			N8 )

Definition at line 128 of file vf_xbr.c.

Referenced by xbr_filter().

FILT4

#define FILT4	(		PE,
			PI,
			PH,
			PF,
			PG,
			PC,
			PD,
			PB,
			PA,
			G5,
			C4,
			G0,
			D0,
			C1,
			B1,
			F4,
			I4,
			H5,
			I5,
			A0,
			A1,
			N15,
			N14,
			N11,
			N3,
			N7,
			N10,
			N13,
			N12,
			N9,
			N6,
			N2,
			N1,
			N5,
			N8,
			N4,
			N0 )

Definition at line 170 of file vf_xbr.c.

Referenced by xbr_filter().

XBR_FUNC

#define XBR_FUNC

(

size

)

Value:

static int xbr##size##x(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
{ \
    xbr_filter(arg, jobnr, nb_jobs, size); \
    return 0; \
}

Definition at line 322 of file vf_xbr.c.

Typedef Documentation

xbrfunc_t

typedef int(* xbrfunc_t) (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)

Definition at line 45 of file vf_xbr.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

xbr

)

pixel_diff()

static uint32_t pixel_diff ( uint32_t x, uint32_t y, const uint32_t * r2y )

static

Definition at line 68 of file vf_xbr.c.

xbr_filter()

static av_always_inline void xbr_filter ( const ThreadData * td, int jobnr, int nb_jobs, int n )

static

Definition at line 216 of file vf_xbr.c.

config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 334 of file vf_xbr.c.

filter_frame()

static int filter_frame ( AVFilterLink * inlink, AVFrame * in )

static

Definition at line 345 of file vf_xbr.c.

init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 373 of file vf_xbr.c.

Variable Documentation

xbr_options

const AVOption xbr_options[]

static

Initial value:

= {
    { "n", "set scale factor", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 3}, 2, 4, .flags = FLAGS },
    { NULL }
}

Definition at line 61 of file vf_xbr.c.

xbr_inputs

const AVFilterPad xbr_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
    },
}

Definition at line 400 of file vf_xbr.c.

xbr_outputs

const AVFilterPad xbr_outputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_output,
    },
}

Definition at line 408 of file vf_xbr.c.

ff_vf_xbr

const FFFilter ff_vf_xbr

Initial value:

= {
    .p.name        = "xbr",
    .p.description = NULL_IF_CONFIG_SMALL("Scale the input using xBR algorithm."),
    .p.priv_class  = &xbr_class,
    .p.flags       = AVFILTER_FLAG_SLICE_THREADS,
    FILTER_INPUTS(xbr_inputs),
    FILTER_OUTPUTS(xbr_outputs),
    FILTER_SINGLE_PIXFMT(AV_PIX_FMT_0RGB32),
    .priv_size     = sizeof(XBRContext),
    .init          = init,
}

Definition at line 416 of file vf_xbr.c.