libavfilter/vf_lut.c File Reference

Compute a look-up table for binding the input value to the output value, and apply it to input video. More...

#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct  LutContext

Defines

#define Y   0
#define U   1
#define V   2
#define R   0
#define G   1
#define B   2
#define A   3
#define OFFSET(x)   offsetof(LutContext, x)
#define YUV_FORMATS
#define RGB_FORMATS
#define DEFINE_LUT_FILTER(name_, description_, init_)

Enumerations

enum  var_name {
  VAR_B1, VAR_B2, VAR_S1, VAR_S2,
  VAR_T1, VAR_T2, VAR_NB, VAR_N,
  VAR_T, VAR_S, VAR_VARS_NB, VAR_W,
  VAR_H, VAR_CW, VAR_CH, VAR_HSUB,
  VAR_VSUB, VARS_NB, VAR_IN_W, VAR_IW,
  VAR_IN_H, VAR_IH, VAR_OUT_W, VAR_OW,
  VAR_OUT_H, VAR_OH, VAR_A, VAR_SAR,
  VAR_DAR, VAR_HSUB, VAR_VSUB, VAR_X,
  VAR_Y, VAR_N, VAR_POS, VAR_T,
  VAR_VARS_NB, VAR_MAIN_W, VAR_w, VAR_W,
  VAR_MAIN_H, VAR_h, VAR_H, VAR_TW,
  VAR_TEXT_W, VAR_TH, VAR_TEXT_H, VAR_MAX_GLYPH_W,
  VAR_MAX_GLYPH_H, VAR_MAX_GLYPH_A, VAR_ASCENT, VAR_MAX_GLYPH_D,
  VAR_DESCENT, VAR_LINE_H, VAR_LH, VAR_SAR,
  VAR_DAR, VAR_HSUB, VAR_VSUB, VAR_X,
  VAR_Y, VAR_N, VAR_T, VAR_VARS_NB,
  VAR_W, VAR_H, VAR_VAL, VAR_MAXVAL,
  VAR_MINVAL, VAR_NEGVAL, VAR_CLIPVAL, VAR_VARS_NB,
  VAR_MAIN_W, VAR_MW, VAR_MAIN_H, VAR_MH,
  VAR_OVERLAY_W, VAR_OW, VAR_OVERLAY_H, VAR_OH,
  VAR_VARS_NB, VAR_IN_W, VAR_IW, VAR_IN_H,
  VAR_IH, VAR_OUT_W, VAR_OW, VAR_OUT_H,
  VAR_OH, VAR_X, VAR_Y, VAR_A,
  VAR_SAR, VAR_DAR, VAR_HSUB, VAR_VSUB,
  VARS_NB, VAR_IN_W, VAR_IW, VAR_IN_H,
  VAR_IH, VAR_OUT_W, VAR_OW, VAR_OUT_H,
  VAR_OH, VAR_A, VAR_SAR, VAR_DAR,
  VAR_HSUB, VAR_VSUB, VARS_NB, VAR_TB,
  VAR_PTS, VAR_START_PTS, VAR_PREV_PTS, VAR_PREV_SELECTED_PTS,
  VAR_T, VAR_START_T, VAR_PREV_T, VAR_PREV_SELECTED_T,
  VAR_PICT_TYPE, VAR_PICT_TYPE_I, VAR_PICT_TYPE_P, VAR_PICT_TYPE_B,
  VAR_PICT_TYPE_S, VAR_PICT_TYPE_SI, VAR_PICT_TYPE_SP, VAR_PICT_TYPE_BI,
  VAR_INTERLACE_TYPE, VAR_INTERLACE_TYPE_P, VAR_INTERLACE_TYPE_T, VAR_INTERLACE_TYPE_B,
  VAR_N, VAR_SELECTED_N, VAR_PREV_SELECTED_N, VAR_KEY,
  VAR_POS, VAR_VARS_NB, VAR_INTERLACED, VAR_N,
  VAR_POS, VAR_PREV_INPTS, VAR_PREV_OUTPTS, VAR_PTS,
  VAR_STARTPTS, VAR_TB, VAR_VARS_NB, VAR_AVTB,
  VAR_INTB, VAR_VARS_NB, VAR_X, VAR_Y,
  VAR_W, VAR_H, VAR_TIME, VAR_SPEED,
  VAR_TEMPO, VAR_ORDER, VAR_PATTERN, VAR_ROW,
  VAR_VARS_NB
}

Functions

static const char * lut_get_name (void *ctx)
static int init (AVFilterContext *ctx, const char *args, void *opaque)
static av_cold void uninit (AVFilterContext *ctx)
static int query_formats (AVFilterContext *ctx)
static double clip (void *opaque, double val)
 Clip value val in the minval - maxval range.
static double compute_gammaval (void *opaque, double gamma)
 Compute gamma correction for value val, assuming the minval-maxval range, val is clipped to a value contained in the same interval.
static int config_props (AVFilterLink *inlink)
static void draw_slice (AVFilterLink *inlink, int y, int h, int slice_dir)

Variables

static const char *const var_names []
static const AVOption lut_options []
static const AVClass lut_class
static enum PixelFormat yuv_pix_fmts [] = { YUV_FORMATS, PIX_FMT_NONE }
static enum PixelFormat rgb_pix_fmts [] = { RGB_FORMATS, PIX_FMT_NONE }
static enum PixelFormat all_pix_fmts [] = { RGB_FORMATS, YUV_FORMATS, PIX_FMT_NONE }
static double(*const funcs1 [])(void *, double)
static const char *const funcs1_names []


Detailed Description

Compute a look-up table for binding the input value to the output value, and apply it to input video.

Definition in file vf_lut.c.


Define Documentation

#define A   3

Definition at line 74 of file vf_lut.c.

#define B   2

Definition at line 73 of file vf_lut.c.

#define DEFINE_LUT_FILTER ( name_,
description_,
init_   ) 

Value:

AVFilter avfilter_vf_##name_ = {                                    \
        .name          = #name_,                                        \
        .description   = NULL_IF_CONFIG_SMALL(description_),            \
        .priv_size     = sizeof(LutContext),                            \
                                                                        \
        .init          = init_,                                         \
        .uninit        = uninit,                                        \
        .query_formats = query_formats,                                 \
                                                                        \
        .inputs    = (const AVFilterPad[]) {{ .name      = "default",   \
                                        .type            = AVMEDIA_TYPE_VIDEO, \
                                        .draw_slice      = draw_slice,  \
                                        .config_props    = config_props, \
                                        .min_perms       = AV_PERM_READ, }, \
                                      { .name = NULL}},                 \
        .outputs   = (const AVFilterPad[]) {{ .name      = "default",   \
                                        .type            = AVMEDIA_TYPE_VIDEO, }, \
                                      { .name = NULL}},                 \
    }

Definition at line 332 of file vf_lut.c.

#define G   1

Definition at line 72 of file vf_lut.c.

#define OFFSET (  )     offsetof(LutContext, x)

Definition at line 76 of file vf_lut.c.

#define R   0

Definition at line 71 of file vf_lut.c.

#define RGB_FORMATS

#define U   1

Definition at line 69 of file vf_lut.c.

#define V   2

Definition at line 70 of file vf_lut.c.

#define Y   0

Definition at line 68 of file vf_lut.c.

#define YUV_FORMATS


Enumeration Type Documentation

enum var_name

Enumerator:
VAR_B1 
VAR_B2 
VAR_S1 
VAR_S2 
VAR_T1 
VAR_T2 
VAR_NB 
VAR_N 
VAR_T 
VAR_S 
VAR_VARS_NB 
VAR_W 
VAR_H 
VAR_CW 
VAR_CH 
VAR_HSUB 
VAR_VSUB 
VARS_NB 
VAR_IN_W 
VAR_IW 
VAR_IN_H 
VAR_IH 
VAR_OUT_W 
VAR_OW 
VAR_OUT_H 
VAR_OH 
VAR_A 
VAR_SAR 
VAR_DAR 
VAR_HSUB 
VAR_VSUB 
VAR_X 
VAR_Y 
VAR_N 
VAR_POS 
VAR_T 
VAR_VARS_NB 
VAR_MAIN_W 
VAR_w 
VAR_W 
VAR_MAIN_H 
VAR_h 
VAR_H 
VAR_TW 
VAR_TEXT_W 
VAR_TH 
VAR_TEXT_H 
VAR_MAX_GLYPH_W 
VAR_MAX_GLYPH_H 
VAR_MAX_GLYPH_A 
VAR_ASCENT 
VAR_MAX_GLYPH_D 
VAR_DESCENT 
VAR_LINE_H 
VAR_LH 
VAR_SAR 
VAR_DAR 
VAR_HSUB 
VAR_VSUB 
VAR_X 
VAR_Y 
VAR_N 
VAR_T 
VAR_VARS_NB 
VAR_W 
VAR_H 
VAR_VAL 
VAR_MAXVAL 
VAR_MINVAL 
VAR_NEGVAL 
VAR_CLIPVAL 
VAR_VARS_NB 
VAR_MAIN_W 
VAR_MW 
VAR_MAIN_H 
VAR_MH 
VAR_OVERLAY_W 
VAR_OW 
VAR_OVERLAY_H 
VAR_OH 
VAR_VARS_NB 
VAR_IN_W 
VAR_IW 
VAR_IN_H 
VAR_IH 
VAR_OUT_W 
VAR_OW 
VAR_OUT_H 
VAR_OH 
VAR_X 
VAR_Y 
VAR_A 
VAR_SAR 
VAR_DAR 
VAR_HSUB 
VAR_VSUB 
VARS_NB 
VAR_IN_W 
VAR_IW 
VAR_IN_H 
VAR_IH 
VAR_OUT_W 
VAR_OW 
VAR_OUT_H 
VAR_OH 
VAR_A 
VAR_SAR 
VAR_DAR 
VAR_HSUB 
VAR_VSUB 
VARS_NB 
VAR_TB 
VAR_PTS 
VAR_START_PTS 
VAR_PREV_PTS 
VAR_PREV_SELECTED_PTS 
VAR_T 
VAR_START_T 
VAR_PREV_T 
VAR_PREV_SELECTED_T 
VAR_PICT_TYPE 
VAR_PICT_TYPE_I 
VAR_PICT_TYPE_P 
VAR_PICT_TYPE_B 
VAR_PICT_TYPE_S 
VAR_PICT_TYPE_SI 
VAR_PICT_TYPE_SP 
VAR_PICT_TYPE_BI 
VAR_INTERLACE_TYPE 
VAR_INTERLACE_TYPE_P 
VAR_INTERLACE_TYPE_T 
VAR_INTERLACE_TYPE_B 
VAR_N 
VAR_SELECTED_N 
VAR_PREV_SELECTED_N 
VAR_KEY 
VAR_POS 
VAR_VARS_NB 
VAR_INTERLACED 
VAR_N 
VAR_POS 
VAR_PREV_INPTS 
VAR_PREV_OUTPTS 
VAR_PTS 
VAR_STARTPTS 
VAR_TB 
VAR_VARS_NB 
VAR_AVTB 
VAR_INTB 
VAR_VARS_NB 
VAR_X 
VAR_Y 
VAR_W 
VAR_H 
VAR_TIME 
VAR_SPEED 
VAR_TEMPO 
VAR_ORDER 
VAR_PATTERN 
VAR_ROW 
VAR_VARS_NB 

Definition at line 44 of file vf_lut.c.


Function Documentation

static double clip ( void *  opaque,
double  val 
) [static]

Clip value val in the minval - maxval range.

Definition at line 162 of file vf_lut.c.

Referenced by rv40_loop_filter(), and vc1_filter_line().

static double compute_gammaval ( void *  opaque,
double  gamma 
) [static]

Compute gamma correction for value val, assuming the minval-maxval range, val is clipped to a value contained in the same interval.

Definition at line 175 of file vf_lut.c.

static int config_props ( AVFilterLink inlink  )  [static]

Definition at line 197 of file vf_lut.c.

static void draw_slice ( AVFilterLink inlink,
int  y,
int  h,
int  slice_dir 
) [static]

Definition at line 284 of file vf_lut.c.

static int init ( AVFilterContext ctx,
const char *  args,
void *  opaque 
) [static]

Definition at line 104 of file vf_lut.c.

static const char* lut_get_name ( void *  ctx  )  [static]

Definition at line 93 of file vf_lut.c.

static int query_formats ( AVFilterContext ctx  )  [static]

Definition at line 148 of file vf_lut.c.

static av_cold void uninit ( AVFilterContext ctx  )  [static]

Definition at line 120 of file vf_lut.c.


Variable Documentation

enum PixelFormat all_pix_fmts[] = { RGB_FORMATS, YUV_FORMATS, PIX_FMT_NONE } [static]

Definition at line 146 of file vf_lut.c.

Referenced by query_formats().

double(* const funcs1[])(void *, double) [static]

const char* const funcs1_names[] [static]

Initial value:

 {
    "clip",
    "gammaval",
    NULL
}

Definition at line 191 of file vf_lut.c.

const AVClass lut_class [static]

Initial value:

 {
    "LutContext",
    lut_get_name,
    lut_options
}

Definition at line 98 of file vf_lut.c.

const AVOption lut_options[] [static]

Initial value:

 {
    {"c0", "set component #0 expression", OFFSET(comp_expr_str[0]),  AV_OPT_TYPE_STRING, {.str="val"}, CHAR_MIN, CHAR_MAX},
    {"c1", "set component #1 expression", OFFSET(comp_expr_str[1]),  AV_OPT_TYPE_STRING, {.str="val"}, CHAR_MIN, CHAR_MAX},
    {"c2", "set component #2 expression", OFFSET(comp_expr_str[2]),  AV_OPT_TYPE_STRING, {.str="val"}, CHAR_MIN, CHAR_MAX},
    {"c3", "set component #3 expression", OFFSET(comp_expr_str[3]),  AV_OPT_TYPE_STRING, {.str="val"}, CHAR_MIN, CHAR_MAX},
    {"y",  "set Y expression", OFFSET(comp_expr_str[Y]),  AV_OPT_TYPE_STRING, {.str="val"}, CHAR_MIN, CHAR_MAX},
    {"u",  "set U expression", OFFSET(comp_expr_str[U]),  AV_OPT_TYPE_STRING, {.str="val"}, CHAR_MIN, CHAR_MAX},
    {"v",  "set V expression", OFFSET(comp_expr_str[V]),  AV_OPT_TYPE_STRING, {.str="val"}, CHAR_MIN, CHAR_MAX},
    {"r",  "set R expression", OFFSET(comp_expr_str[R]),  AV_OPT_TYPE_STRING, {.str="val"}, CHAR_MIN, CHAR_MAX},
    {"g",  "set G expression", OFFSET(comp_expr_str[G]),  AV_OPT_TYPE_STRING, {.str="val"}, CHAR_MIN, CHAR_MAX},
    {"b",  "set B expression", OFFSET(comp_expr_str[B]),  AV_OPT_TYPE_STRING, {.str="val"}, CHAR_MIN, CHAR_MAX},
    {"a",  "set A expression", OFFSET(comp_expr_str[A]),  AV_OPT_TYPE_STRING, {.str="val"}, CHAR_MIN, CHAR_MAX},
    {NULL},
}

Definition at line 78 of file vf_lut.c.

enum PixelFormat rgb_pix_fmts[] = { RGB_FORMATS, PIX_FMT_NONE } [static]

Definition at line 145 of file vf_lut.c.

Referenced by config_props(), and query_formats().

const char* const var_names[] [static]

Initial value:

 {
    "w",        
    "h",        
    "val",      
    "maxval",   
    "minval",   
    "negval",   
    "clipval",
    NULL
}

Definition at line 33 of file vf_lut.c.

enum PixelFormat yuv_pix_fmts[] = { YUV_FORMATS, PIX_FMT_NONE } [static]

Definition at line 144 of file vf_lut.c.

Referenced by config_props(), and query_formats().


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