FFmpeg
Data Structures | Macros | Typedefs | Functions | Variables
vf_xbr.c File Reference
#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
 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 query_formats (AVFilterContext *ctx)
 
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 []
 
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 36 of file vf_xbr.c.

◆ RED_BLUE_MASK

#define RED_BLUE_MASK   0x00FF00FF

Definition at line 37 of file vf_xbr.c.

◆ GREEN_MASK

#define GREEN_MASK   0x0000FF00

Definition at line 38 of file vf_xbr.c.

◆ OFFSET

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

Definition at line 58 of file vf_xbr.c.

◆ FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 59 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 82 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 83 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 85 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 86 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 87 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 88 of file vf_xbr.c.

◆ df

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

Definition at line 90 of file vf_xbr.c.

◆ eq

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

Definition at line 91 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 93 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 127 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 169 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 321 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 44 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 67 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 215 of file vf_xbr.c.

◆ config_output()

static int config_output ( AVFilterLink *  outlink)
static

Definition at line 333 of file vf_xbr.c.

◆ query_formats()

static int query_formats ( AVFilterContext *  ctx)
static

Definition at line 344 of file vf_xbr.c.

◆ filter_frame()

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

Definition at line 356 of file vf_xbr.c.

◆ init()

static av_cold int init ( AVFilterContext *  ctx)
static

Definition at line 383 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 60 of file vf_xbr.c.

◆ xbr_inputs

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

Definition at line 410 of file vf_xbr.c.

◆ xbr_outputs

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

Definition at line 419 of file vf_xbr.c.

◆ ff_vf_xbr

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 428 of file vf_xbr.c.

xbr_outputs
static const AVFilterPad xbr_outputs[]
Definition: vf_xbr.c:419
b
#define b
Definition: input.c:41
xbr_inputs
static const AVFilterPad xbr_inputs[]
Definition: vf_xbr.c:410
s
#define s(width, name)
Definition: cbs_vp9.c:257
FLAGS
#define FLAGS
Definition: vf_xbr.c:59
ctx
AVFormatContext * ctx
Definition: movenc.c:48
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_xbr.c:344
arg
const char * arg
Definition: jacosubdec.c:66
NULL
#define NULL
Definition: coverity.c:32
XBRContext
Definition: vf_xbr.c:46
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:188
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_xbr.c:333
size
int size
Definition: twinvq_data.h:11134
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:37
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:223
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_xbr.c:356
AVFilterContext
An instance of a filter.
Definition: avfilter.h:338
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:116
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_xbr.c:383
GREEN_MASK
#define GREEN_MASK
Definition: vf_xbr.c:38
OFFSET
#define OFFSET(x)
Definition: vf_xbr.c:58
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:565
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