FFmpeg
Data Structures | Macros | Typedefs | Functions | Variables
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
 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

#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 58 of file vf_xbr.c.

Definition at line 59 of file vf_xbr.c.

#define YMASK   0xff0000

Referenced by pixel_diff().

#define UMASK   0x00ff00

Referenced by pixel_diff().

#define VMASK   0x0000ff

Referenced by pixel_diff().

#define ABSDIFF (   a,
  b 
)    (abs((int)(a)-(int)(b)))

Referenced by pixel_diff().

#define ALPHA_BLEND_128_W (   a,
  b 
)    ((((a) & LB_MASK) >> 1) + (((b) & LB_MASK) >> 1))

Definition at line 82 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)))))
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:36
#define b
Definition: input.c:41
#define RED_BLUE_MASK
Definition: vf_xbr.c:37
#define s(width, name)
Definition: cbs_vp9.c:257
#define GREEN_MASK
Definition: vf_xbr.c:38

Definition at line 83 of file vf_xbr.c.

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

Definition at line 85 of file vf_xbr.c.

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

Definition at line 86 of file vf_xbr.c.

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

Definition at line 87 of file vf_xbr.c.

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

Definition at line 88 of file vf_xbr.c.

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

Definition at line 90 of file vf_xbr.c.

Referenced by filter_slice().

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

Definition at line 91 of file vf_xbr.c.

Referenced by check_eq(), config_props(), 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 93 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 127 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 169 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; \
}
ptrdiff_t size
Definition: opengl_enc.c:100
const char * arg
Definition: jacosubdec.c:66
static av_always_inline void xbr_filter(const ThreadData *td, int jobnr, int nb_jobs, int n)
Definition: vf_xbr.c:215
AVFormatContext * ctx
Definition: movenc.c:48
An instance of a filter.
Definition: avfilter.h:338
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a it should return

Definition at line 321 of file vf_xbr.c.

Typedef Documentation

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 ( xbr  )
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.

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.

static int config_output ( AVFilterLink outlink)
static

Definition at line 333 of file vf_xbr.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 344 of file vf_xbr.c.

static int filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 356 of file vf_xbr.c.

static av_cold int init ( AVFilterContext ctx)
static

Definition at line 383 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 }
}
#define NULL
Definition: coverity.c:32
#define OFFSET(x)
Definition: vf_xbr.c:58
#define FLAGS
Definition: vf_xbr.c:59
int n
Definition: avisynth_c.h:760

Definition at line 60 of file vf_xbr.c.

const AVFilterPad xbr_inputs[]
static
Initial value:
= {
{
.name = "default",
.filter_frame = filter_frame,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_xbr.c:356

Definition at line 410 of file vf_xbr.c.

const AVFilterPad xbr_outputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_output,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int config_output(AVFilterLink *outlink)
Definition: vf_xbr.c:333

Definition at line 419 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,
}
static const AVFilterPad xbr_inputs[]
Definition: vf_xbr.c:410
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
static int query_formats(AVFilterContext *ctx)
Definition: vf_xbr.c:344
#define flags(name, subs,...)
Definition: cbs_av1.c:561
static av_cold int init(AVFilterContext *ctx)
Definition: vf_xbr.c:383
static const AVFilterPad xbr_outputs[]
Definition: vf_xbr.c:419

Definition at line 428 of file vf_xbr.c.