vsrc_gradients.c File Reference

#include "avfilter.h"
#include "filters.h"
#include "video.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/lfg.h"
#include "libavutil/random_seed.h"
#include <float.h>
#include <math.h>

Go to the source code of this file.

Data Structures
struct	GradientsContext

Macros
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	VFT   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Functions
	AVFILTER_DEFINE_CLASS (gradients)
static float	lerpf (float a, float b, float x)
static uint32_t	lerp_color (uint8_t c0[4], uint8_t c1[4], float x)
static uint64_t	lerp_color16 (uint8_t c0[4], uint8_t c1[4], float x)
static uint32_t	lerp_colors (uint8_t arr[8][4], int nb_colors, int nb_wrap_colors, float step)
static uint64_t	lerp_colors16 (uint8_t arr[8][4], int nb_colors, int nb_wrap_colors, float step)
static void	lerp_colors32 (float arr[8][4], int nb_colors, int nb_wrap_colors, float step, float *r, float *g, float *b, float *a)
static float	project (float origin_x, float origin_y, float dest_x, float dest_y, float point_x, float point_y, int type)
static int	draw_gradients_slice (AVFilterContext *ctx, void *arg, int job, int nb_jobs)
static int	draw_gradients_slice16 (AVFilterContext *ctx, void *arg, int job, int nb_jobs)
static int	draw_gradients_slice32_planar (AVFilterContext *ctx, void *arg, int job, int nb_jobs)
static int	config_output (AVFilterLink *outlink)
static int	activate (AVFilterContext *ctx)

Variables
static const AVOption	gradients_options []
static const AVFilterPad	gradients_outputs []
const FFFilter	ff_vsrc_gradients

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(GradientsContext, x)

Definition at line 53 of file vsrc_gradients.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 54 of file vsrc_gradients.c.

VFT

#define VFT   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 55 of file vsrc_gradients.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

gradients

)

lerpf()

static float lerpf ( float a, float b, float x )

static

Definition at line 92 of file vsrc_gradients.c.

Referenced by lerp_colors32().

lerp_color()

static uint32_t lerp_color ( uint8_t c0[4], uint8_t c1[4], float x )

static

Definition at line 99 of file vsrc_gradients.c.

Referenced by lerp_colors().

lerp_color16()

static uint64_t lerp_color16 ( uint8_t c0[4], uint8_t c1[4], float x )

static

Definition at line 109 of file vsrc_gradients.c.

Referenced by lerp_colors16().

lerp_colors()

static uint32_t lerp_colors ( uint8_t arr[8][4], int nb_colors, int nb_wrap_colors, float step )

static

Definition at line 119 of file vsrc_gradients.c.

Referenced by draw_gradients_slice().

lerp_colors16()

static uint64_t lerp_colors16 ( uint8_t arr[8][4], int nb_colors, int nb_wrap_colors, float step )

static

Definition at line 142 of file vsrc_gradients.c.

Referenced by draw_gradients_slice16().

lerp_colors32()

static void lerp_colors32 ( float arr[8][4], int nb_colors, int nb_wrap_colors, float step, float * r, float * g, float * b, float * a )

static

Definition at line 165 of file vsrc_gradients.c.

Referenced by draw_gradients_slice32_planar().

project()

static float project ( float origin_x, float origin_y, float dest_x, float dest_y, float point_x, float point_y, int type )

static

Definition at line 202 of file vsrc_gradients.c.

Referenced by draw_gradients_slice(), draw_gradients_slice16(), and draw_gradients_slice32_planar().

draw_gradients_slice()

static int draw_gradients_slice ( AVFilterContext * ctx, void * arg, int job, int nb_jobs )

static

Definition at line 251 of file vsrc_gradients.c.

Referenced by config_output().

draw_gradients_slice16()

static int draw_gradients_slice16 ( AVFilterContext * ctx, void * arg, int job, int nb_jobs )

static

Definition at line 275 of file vsrc_gradients.c.

Referenced by config_output().

draw_gradients_slice32_planar()

static int draw_gradients_slice32_planar ( AVFilterContext * ctx, void * arg, int job, int nb_jobs )

static

Definition at line 299 of file vsrc_gradients.c.

Referenced by config_output().

config_output()

static int config_output ( AVFilterLink * outlink )

static

Definition at line 333 of file vsrc_gradients.c.

activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 383 of file vsrc_gradients.c.

Variable Documentation

gradients_options

const AVOption gradients_options[]

static

Definition at line 57 of file vsrc_gradients.c.

gradients_outputs

const AVFilterPad gradients_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .config_props  = config_output,
    },
}

Definition at line 427 of file vsrc_gradients.c.

ff_vsrc_gradients

const FFFilter ff_vsrc_gradients

Initial value:

= {
    .p.name        = "gradients",
    .p.description = NULL_IF_CONFIG_SMALL("Draw a gradients."),
    .p.priv_class  = &gradients_class,
    .p.inputs      = NULL,
    .p.flags       = AVFILTER_FLAG_SLICE_THREADS,
    .priv_size     = sizeof(GradientsContext),
    FILTER_OUTPUTS(gradients_outputs),
    FILTER_PIXFMTS(AV_PIX_FMT_RGBA, AV_PIX_FMT_RGBA64, AV_PIX_FMT_GBRAPF32),
    .activate      = activate,
    .process_command = ff_filter_process_command,
}

Definition at line 435 of file vsrc_gradients.c.