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vf_xbr.c File Reference

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

#include "libavutil/opt.h"
#include "libavutil/avassert.h"
#include "libavutil/pixdesc.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct  XBRContext
 
struct  ThreadData
 

Macros

#define LB_MASK   0x00FEFEFE
 
#define RED_BLUE_MASK   0x00FF00FF
 
#define GREEN_MASK   0x0000FF00
 
#define OFFSET(x)   offsetof(XBRContext, x)
 
#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
 
#define YMASK   0xff0000
 
#define UMASK   0x00ff00
 
#define VMASK   0x0000ff
 
#define ALPHA_BLEND_128_W(a, b)   ((((a) & LB_MASK) >> 1) + (((b) & LB_MASK) >> 1))
 
#define ALPHA_BLEND_BASE(a, b, m, s)
 
#define ALPHA_BLEND_32_W(a, b)   ALPHA_BLEND_BASE(a, b, 1, 3)
 
#define ALPHA_BLEND_64_W(a, b)   ALPHA_BLEND_BASE(a, b, 1, 2)
 
#define ALPHA_BLEND_192_W(a, b)   ALPHA_BLEND_BASE(a, b, 3, 2)
 
#define ALPHA_BLEND_224_W(a, b)   ALPHA_BLEND_BASE(a, b, 7, 3)
 
#define df(A, B)   pixel_diff(A, B, r2y)
 
#define eq(A, B)   (df(A, B) < 155)
 
#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 query_formats (AVFilterContext *ctx)
 
static int filter_frame (AVFilterLink *inlink, AVFrame *in)
 
static int init (AVFilterContext *ctx)
 

Variables

static const AVOption xbr_options []
 
static const AVFilterPad xbr_inputs []
 
static const AVFilterPad xbr_outputs []
 
AVFilter ff_vf_xbr
 

Detailed Description

XBR Filter is used for depixelization of image.

This is based on Hyllian's xBR shader.

See Also
http://www.libretro.com/forums/viewtopic.php?f=6&t=134
https://github.com/yoyofr/iFBA/blob/master/fba_src/src/intf/video/scalers/xbr.cpp

Definition in file vf_xbr.c.

Macro Definition Documentation

#define LB_MASK   0x00FEFEFE

Definition at line 36 of file vf_xbr.c.

#define RED_BLUE_MASK   0x00FF00FF

Definition at line 37 of file vf_xbr.c.

#define GREEN_MASK   0x0000FF00

Definition at line 38 of file vf_xbr.c.

#define OFFSET (   x)    offsetof(XBRContext, x)

Definition at line 54 of file vf_xbr.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 55 of file vf_xbr.c.

#define YMASK   0xff0000
#define UMASK   0x00ff00
#define VMASK   0x0000ff
#define ALPHA_BLEND_128_W (   a,
  b 
)    ((((a) & LB_MASK) >> 1) + (((b) & LB_MASK) >> 1))

Definition at line 77 of file vf_xbr.c.

#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 78 of file vf_xbr.c.

#define ALPHA_BLEND_32_W (   a,
  b 
)    ALPHA_BLEND_BASE(a, b, 1, 3)

Definition at line 80 of file vf_xbr.c.

#define ALPHA_BLEND_64_W (   a,
  b 
)    ALPHA_BLEND_BASE(a, b, 1, 2)

Definition at line 81 of file vf_xbr.c.

#define ALPHA_BLEND_192_W (   a,
  b 
)    ALPHA_BLEND_BASE(a, b, 3, 2)

Definition at line 82 of file vf_xbr.c.

#define ALPHA_BLEND_224_W (   a,
  b 
)    ALPHA_BLEND_BASE(a, b, 7, 3)

Definition at line 83 of file vf_xbr.c.

#define df (   A,
  B 
)    pixel_diff(A, B, r2y)

Definition at line 85 of file vf_xbr.c.

Referenced by filter_slice().

#define eq (   A,
  B 
)    (df(A, B) < 155)

Definition at line 86 of file vf_xbr.c.

Referenced by avfilter_register_all(), filter_frame(), initialize(), process_command(), and uninit().

#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 88 of file vf_xbr.c.

Referenced by xbr_filter().

#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 122 of file vf_xbr.c.

Referenced by xbr_filter().

#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 164 of file vf_xbr.c.

Referenced by xbr_filter().

#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 316 of file vf_xbr.c.

Typedef Documentation

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

Definition at line 40 of file vf_xbr.c.

Function Documentation

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

Definition at line 63 of file vf_xbr.c.

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

Definition at line 210 of file vf_xbr.c.

static int config_output ( AVFilterLink *  outlink)
static

Definition at line 328 of file vf_xbr.c.

static int query_formats ( AVFilterContext *  ctx)
static

Definition at line 339 of file vf_xbr.c.

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

Definition at line 349 of file vf_xbr.c.

static int init ( AVFilterContext *  ctx)
static

Definition at line 376 of file vf_xbr.c.

Variable Documentation

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 56 of file vf_xbr.c.

const AVFilterPad xbr_inputs[]
static
Initial value:
= {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
}

Definition at line 403 of file vf_xbr.c.

const AVFilterPad xbr_outputs[]
static
Initial value:
= {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
}

Definition at line 412 of file vf_xbr.c.

AVFilter ff_vf_xbr
Initial value:
= {
.name = "xbr",
.description = NULL_IF_CONFIG_SMALL("Scale the input using xBR algorithm."),
.inputs = xbr_inputs,
.outputs = xbr_outputs,
.query_formats = query_formats,
.priv_size = sizeof(XBRContext),
.priv_class = &xbr_class,
.init = init,
.flags = AVFILTER_FLAG_SLICE_THREADS,
}

Definition at line 421 of file vf_xbr.c.

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