vsrc_gradients.c File Reference

#include "avfilter.h"
#include "filters.h"
#include "video.h"
#include "internal.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)   offsetof(GradientsContext, 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 AVFilter	ff_vsrc_gradients

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(GradientsContext, x)

Definition at line 54 of file vsrc_gradients.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 55 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 56 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 93 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 100 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 110 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 120 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 143 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 166 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 203 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 252 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 276 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 300 of file vsrc_gradients.c.

Referenced by config_output().

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 334 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 58 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 438 of file vsrc_gradients.c.

ff_vsrc_gradients

const AVFilter ff_vsrc_gradients

Initial value:

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

Definition at line 446 of file vsrc_gradients.c.