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/common.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.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 FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define YUV_FORMATS
#define RGB_FORMATS
#define DEFINE_LUT_FILTER(name_, description_)

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_FRAME_RATE,
  VAR_INTERLACED, VAR_N, VAR_NB_CONSUMED_SAMPLES, VAR_NB_SAMPLES,
  VAR_POS, VAR_PREV_INPTS, VAR_PREV_INT, VAR_PREV_OUTPTS,
  VAR_PREV_OUTT, VAR_PTS, VAR_SAMPLE_RATE, VAR_STARTPTS,
  VAR_STARTT, VAR_T, VAR_TB, VAR_VARS_NB,
  VAR_AVTB, VAR_INTB, VAR_SR, 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_DAR, VAR_HSUB,
  VAR_VSUB, VAR_LINE_H, VAR_LH, VAR_MAIN_H,
  VAR_h, VAR_H, VAR_MAIN_W, VAR_w,
  VAR_W, VAR_MAX_GLYPH_A, VAR_ASCENT, VAR_MAX_GLYPH_D,
  VAR_DESCENT, VAR_MAX_GLYPH_H, VAR_MAX_GLYPH_W, VAR_N,
  VAR_SAR, VAR_T, VAR_TEXT_H, VAR_TH,
  VAR_TEXT_W, VAR_TW, VAR_X, VAR_Y,
  VAR_VARS_NB, VAR_N, VAR_PTS, VAR_R,
  VAR_T, VAR_TB, VAR_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_SCENE, 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 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 int draw_slice (AVFilterLink *inlink, int y, int h, int slice_dir)

Variables

static const char *const var_names []
static const AVOption options []
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 []
static const AVFilterPad inputs []
static const AVFilterPad outputs []


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 76 of file vf_lut.c.

#define B   2

Definition at line 75 of file vf_lut.c.

#define DEFINE_LUT_FILTER ( name_,
description_   ) 

Value:

AVFilter avfilter_vf_##name_ = {                                    \
        .name          = #name_,                                        \
        .description   = NULL_IF_CONFIG_SMALL(description_),            \
        .priv_size     = sizeof(LutContext),                            \
                                                                        \
        .init          = name_##_init,                                  \
        .uninit        = uninit,                                        \
        .query_formats = query_formats,                                 \
                                                                        \
        .inputs        = inputs,                                        \
        .outputs       = outputs,                                       \
        .priv_class    = &name_##_class,                                \
    }

Definition at line 335 of file vf_lut.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 79 of file vf_lut.c.

#define G   1

Definition at line 74 of file vf_lut.c.

#define OFFSET (  )     offsetof(LutContext, x)

Definition at line 78 of file vf_lut.c.

#define R   0

Definition at line 73 of file vf_lut.c.

#define RGB_FORMATS

#define U   1

Definition at line 71 of file vf_lut.c.

#define V   2

Definition at line 72 of file vf_lut.c.

#define Y   0

Definition at line 70 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_FRAME_RATE 
VAR_INTERLACED 
VAR_N 
VAR_NB_CONSUMED_SAMPLES 
VAR_NB_SAMPLES 
VAR_POS 
VAR_PREV_INPTS 
VAR_PREV_INT 
VAR_PREV_OUTPTS 
VAR_PREV_OUTT 
VAR_PTS 
VAR_SAMPLE_RATE 
VAR_STARTPTS 
VAR_STARTT 
VAR_T 
VAR_TB 
VAR_VARS_NB 
VAR_AVTB 
VAR_INTB 
VAR_SR 
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_DAR 
VAR_HSUB 
VAR_VSUB 
VAR_LINE_H 
VAR_LH 
VAR_MAIN_H 
VAR_h 
VAR_H 
VAR_MAIN_W 
VAR_w 
VAR_W 
VAR_MAX_GLYPH_A 
VAR_ASCENT 
VAR_MAX_GLYPH_D 
VAR_DESCENT 
VAR_MAX_GLYPH_H 
VAR_MAX_GLYPH_W 
VAR_N 
VAR_SAR 
VAR_T 
VAR_TEXT_H 
VAR_TH 
VAR_TEXT_W 
VAR_TW 
VAR_X 
VAR_Y 
VAR_VARS_NB 
VAR_N 
VAR_PTS 
VAR_R 
VAR_T 
VAR_TB 
VAR_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_SCENE 
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 47 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 138 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 151 of file vf_lut.c.

static int config_props ( AVFilterLink inlink  )  [static]

Definition at line 173 of file vf_lut.c.

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

Definition at line 262 of file vf_lut.c.

static int query_formats ( AVFilterContext ctx  )  [static]

Definition at line 124 of file vf_lut.c.

static av_cold void uninit ( AVFilterContext ctx  )  [static]

Definition at line 96 of file vf_lut.c.


Variable Documentation

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

Definition at line 122 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 167 of file vf_lut.c.

const AVFilterPad inputs[] [static]

Initial value:

 {
    { .name            = "default",
      .type            = AVMEDIA_TYPE_VIDEO,
      .draw_slice      = draw_slice,
      .config_props    = config_props,
      .min_perms       = AV_PERM_READ, },
    { .name = NULL}
}

Definition at line 322 of file vf_lut.c.

Referenced by av_buffersink_read(), av_buffersink_read_samples(), avfilter_graph_parse(), avfilter_link(), configure_filtergraph(), exit_program(), init_filters(), insert_conv_filter(), join_config_output(), and push_frame().

const AVOption options[] [static]

Initial value:

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

Definition at line 81 of file vf_lut.c.

const AVFilterPad outputs[] [static]

Initial value:

 {
    { .name            = "default",
      .type            = AVMEDIA_TYPE_VIDEO, },
    { .name = NULL}
}

Definition at line 330 of file vf_lut.c.

Referenced by avfilter_graph_parse(), configure_filtergraph(), exit_program(), and init_filters().

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

Definition at line 121 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 36 of file vf_lut.c.

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

Definition at line 120 of file vf_lut.c.

Referenced by config_props(), and query_formats().


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