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Data Structures | Macros | Enumerations | Functions | Variables
vf_geq.c File Reference

Generic equation change filter Originally written by Michael Niedermayer for the MPlayer project, and ported by Clément Bœsch for FFmpeg. More...

#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct  GEQContext
 

Macros

#define OFFSET(x)   offsetof(GEQContext, x)
 
#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 

Enumerations

enum  {
  Y = 0, U, V, A,
  G, B, R
}
 
enum  {
  VAR_X, VAR_Y, VAR_W, VAR_H,
  VAR_N, VAR_SW, VAR_SH, VAR_T,
  VAR_VARS_NB
}
 

Functions

 AVFILTER_DEFINE_CLASS (geq)
 
static double getpix (void *priv, double x, double y, int plane)
 
static double lum (void *priv, double x, double y)
 
static double cb (void *priv, double x, double y)
 
static double cr (void *priv, double x, double y)
 
static double alpha (void *priv, double x, double y)
 
static av_cold int geq_init (AVFilterContext *ctx)
 
static int geq_query_formats (AVFilterContext *ctx)
 
static int geq_config_props (AVFilterLink *inlink)
 
static int geq_filter_frame (AVFilterLink *inlink, AVFrame *in)
 
static av_cold void geq_uninit (AVFilterContext *ctx)
 

Variables

static const AVOption geq_options []
 
static const char *const var_names [] = { "X", "Y", "W", "H", "N", "SW", "SH", "T", NULL }
 
static const AVFilterPad geq_inputs []
 
static const AVFilterPad geq_outputs []
 
AVFilter ff_vf_geq
 

Detailed Description

Generic equation change filter Originally written by Michael Niedermayer for the MPlayer project, and ported by Clément Bœsch for FFmpeg.

Definition in file vf_geq.c.

Macro Definition Documentation

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

Definition at line 49 of file vf_geq.c.

Definition at line 50 of file vf_geq.c.

Enumeration Type Documentation

anonymous enum
Enumerator
Y 
U 
V 
A 
G 
B 
R 

Definition at line 47 of file vf_geq.c.

anonymous enum
Enumerator
VAR_X 
VAR_Y 
VAR_W 
VAR_H 
VAR_N 
VAR_SW 
VAR_SH 
VAR_T 
VAR_VARS_NB 

Definition at line 111 of file vf_geq.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( geq  )
static double getpix ( void priv,
double  x,
double  y,
int  plane 
)
inlinestatic

Definition at line 72 of file vf_geq.c.

Referenced by alpha(), cb(), cr(), and lum().

static double lum ( void priv,
double  x,
double  y 
)
static

Definition at line 105 of file vf_geq.c.

Referenced by geq_init().

static double cb ( void priv,
double  x,
double  y 
)
static
static double cr ( void priv,
double  x,
double  y 
)
static
static double alpha ( void priv,
double  x,
double  y 
)
static

Definition at line 108 of file vf_geq.c.

Referenced by geq_init().

static av_cold int geq_init ( AVFilterContext ctx)
static

Definition at line 113 of file vf_geq.c.

static int geq_query_formats ( AVFilterContext ctx)
static

Definition at line 178 of file vf_geq.c.

static int geq_config_props ( AVFilterLink inlink)
static

Definition at line 220 of file vf_geq.c.

static int geq_filter_frame ( AVFilterLink inlink,
AVFrame in 
)
static

Definition at line 235 of file vf_geq.c.

static av_cold void geq_uninit ( AVFilterContext ctx)
static

Definition at line 289 of file vf_geq.c.

Variable Documentation

const AVOption geq_options[]
static
Initial value:
= {
{ "lum_expr", "set luminance expression", OFFSET(expr_str[Y]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "lum", "set luminance expression", OFFSET(expr_str[Y]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "cb_expr", "set chroma blue expression", OFFSET(expr_str[U]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "cb", "set chroma blue expression", OFFSET(expr_str[U]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "cr_expr", "set chroma red expression", OFFSET(expr_str[V]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "cr", "set chroma red expression", OFFSET(expr_str[V]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "alpha_expr", "set alpha expression", OFFSET(expr_str[A]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "a", "set alpha expression", OFFSET(expr_str[A]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "red_expr", "set red expression", OFFSET(expr_str[R]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "r", "set red expression", OFFSET(expr_str[R]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "green_expr", "set green expression", OFFSET(expr_str[G]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "g", "set green expression", OFFSET(expr_str[G]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "blue_expr", "set blue expression", OFFSET(expr_str[B]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "b", "set blue expression", OFFSET(expr_str[B]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{NULL},
}
#define NULL
Definition: coverity.c:32
Definition: vf_geq.c:47
Definition: vf_geq.c:47
Definition: vf_geq.c:47
Definition: vf_geq.c:47
#define OFFSET(x)
Definition: vf_geq.c:49
Definition: vf_geq.c:47
#define FLAGS
Definition: vf_geq.c:50
Definition: vf_geq.c:47
Definition: vf_geq.c:47

Definition at line 52 of file vf_geq.c.

const char* const var_names[] = { "X", "Y", "W", "H", "N", "SW", "SH", "T", NULL }
static

Definition at line 110 of file vf_geq.c.

Referenced by geq_init().

const AVFilterPad geq_inputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = geq_config_props,
.filter_frame = geq_filter_frame,
},
{ NULL }
}
#define NULL
Definition: coverity.c:32
static int geq_config_props(AVFilterLink *inlink)
Definition: vf_geq.c:220
static int geq_filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_geq.c:235

Definition at line 298 of file vf_geq.c.

const AVFilterPad geq_outputs[]
static
Initial value:
= {
{
.name = "default",
},
{ NULL }
}
#define NULL
Definition: coverity.c:32

Definition at line 308 of file vf_geq.c.

AVFilter ff_vf_geq
Initial value:
= {
.name = "geq",
.description = NULL_IF_CONFIG_SMALL("Apply generic equation to each pixel."),
.priv_size = sizeof(GEQContext),
.priv_class = &geq_class,
}
static const AVFilterPad geq_inputs[]
Definition: vf_geq.c:298
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static av_cold void geq_uninit(AVFilterContext *ctx)
Definition: vf_geq.c:289
static const AVFilterPad geq_outputs[]
Definition: vf_geq.c:308
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:125
static int geq_query_formats(AVFilterContext *ctx)
Definition: vf_geq.c:178
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:279
static int flags
Definition: log.c:57
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:389
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:379
static av_cold int geq_init(AVFilterContext *ctx)
Definition: vf_geq.c:113
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:244

Definition at line 316 of file vf_geq.c.