FFmpeg
Data Structures | Macros | Typedefs | Functions | Variables
vf_xbr.c File Reference
#include "libavutil/opt.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 []
 
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 35 of file vf_xbr.c.

◆ RED_BLUE_MASK

#define RED_BLUE_MASK   0x00FF00FF

Definition at line 36 of file vf_xbr.c.

◆ GREEN_MASK

#define GREEN_MASK   0x0000FF00

Definition at line 37 of file vf_xbr.c.

◆ OFFSET

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

Definition at line 57 of file vf_xbr.c.

◆ FLAGS

Definition at line 58 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 81 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 82 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 84 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 85 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 86 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 87 of file vf_xbr.c.

◆ df

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

Definition at line 89 of file vf_xbr.c.

◆ eq

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

Definition at line 90 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 92 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 126 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 168 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 320 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 43 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 66 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 214 of file vf_xbr.c.

◆ config_output()

static int config_output ( AVFilterLink outlink)
static

Definition at line 332 of file vf_xbr.c.

◆ query_formats()

static int query_formats ( AVFilterContext ctx)
static

Definition at line 343 of file vf_xbr.c.

◆ filter_frame()

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 355 of file vf_xbr.c.

◆ init()

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 382 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 59 of file vf_xbr.c.

◆ xbr_inputs

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

Definition at line 409 of file vf_xbr.c.

◆ xbr_outputs

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

Definition at line 418 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."),
.inputs = xbr_inputs,
.outputs = xbr_outputs,
.query_formats = query_formats,
.priv_size = sizeof(XBRContext),
.priv_class = &xbr_class,
.init = init,
}

Definition at line 427 of file vf_xbr.c.

xbr_outputs
static const AVFilterPad xbr_outputs[]
Definition: vf_xbr.c:418
b
#define b
Definition: input.c:40
xbr_inputs
static const AVFilterPad xbr_inputs[]
Definition: vf_xbr.c:409
s
#define s(width, name)
Definition: cbs_vp9.c:257
FLAGS
#define FLAGS
Definition: vf_xbr.c:58
ctx
AVFormatContext * ctx
Definition: movenc.c:48
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_xbr.c:343
arg
const char * arg
Definition: jacosubdec.c:67
NULL
#define NULL
Definition: coverity.c:32
XBRContext
Definition: vf_xbr.c:45
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:116
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_xbr.c:332
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:36
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_xbr.c:355
AVFilterContext
An instance of a filter.
Definition: avfilter.h:333
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:117
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_xbr.c:382
GREEN_MASK
#define GREEN_MASK
Definition: vf_xbr.c:37
OFFSET
#define OFFSET(x)
Definition: vf_xbr.c:57
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561