FFmpeg
Data Structures | Macros | Typedefs | Functions | Variables
vf_xbr.c File Reference
#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)   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 ABSDIFF(a, b)   (abs((int)(a)-(int)(b)))
 
#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 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 AVFilter 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)    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 
)    (abs((int)(a)-(int)(b)))

◆ ALPHA_BLEND_128_W

#define ALPHA_BLEND_128_W (   a,
  b 
)    ((((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 
)    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 
)    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 
)    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 
)    ALPHA_BLEND_BASE(a, b, 7, 3)

Definition at line 89 of file vf_xbr.c.

◆ df

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

Definition at line 91 of file vf_xbr.c.

◆ eq

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

Definition at line 92 of file vf_xbr.c.

◆ 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.

◆ 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.

◆ 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.

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

Definition at line 416 of file vf_xbr.c.

xbr_outputs
static const AVFilterPad xbr_outputs[]
Definition: vf_xbr.c:408
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: filters.h:262
b
#define b
Definition: input.c:41
xbr_inputs
static const AVFilterPad xbr_inputs[]
Definition: vf_xbr.c:400
s
#define s(width, name)
Definition: cbs_vp9.c:198
FLAGS
#define FLAGS
Definition: vf_xbr.c:60
ctx
AVFormatContext * ctx
Definition: movenc.c:49
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: filters.h:263
arg
const char * arg
Definition: jacosubdec.c:67
NULL
#define NULL
Definition: coverity.c:32
XBRContext
Definition: vf_xbr.c:47
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:94
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_xbr.c:334
size
int size
Definition: twinvq_data.h:10344
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
RED_BLUE_MASK
#define RED_BLUE_MASK
Definition: vf_xbr.c:38
AV_PIX_FMT_0RGB32
#define AV_PIX_FMT_0RGB32
Definition: pixfmt.h:479
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_xbr.c:345
AVFilterContext
An instance of a filter.
Definition: avfilter.h:457
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:152
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_xbr.c:373
GREEN_MASK
#define GREEN_MASK
Definition: vf_xbr.c:39
OFFSET
#define OFFSET(x)
Definition: vf_xbr.c:59
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:482
FILTER_SINGLE_PIXFMT
#define FILTER_SINGLE_PIXFMT(pix_fmt_)
Definition: filters.h:252
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