vf_colortemperature.c File Reference

#include <float.h>
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "drawutils.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	ColorTemperatureContext

Macros
#define	R   0
#define	G   1
#define	B   2
#define	PROCESS()
#define	OFFSET(x)   offsetof(ColorTemperatureContext, x)
#define	VF   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Functions
static float	saturate (float input)
static void	kelvin2rgb (float k, float *rgb)
static float	lerpf (float v0, float v1, float f)
static int	temperature_slice8 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	temperature_slice16 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	temperature_slice8p (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	temperature_slice16p (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *frame)
static av_cold int	query_formats (AVFilterContext *ctx)
static av_cold int	config_input (AVFilterLink *inlink)
	AVFILTER_DEFINE_CLASS (colortemperature)

Variables
static const AVFilterPad	inputs []
static const AVFilterPad	outputs []
static const AVOption	colortemperature_options []
AVFilter	ff_vf_colortemperature

Macro Definition Documentation

R

#define R   0

Definition at line 31 of file vf_colortemperature.c.

G

#define G   1

Definition at line 32 of file vf_colortemperature.c.

B

#define B   2

Definition at line 33 of file vf_colortemperature.c.

PROCESS

#define PROCESS

(

)

Value:

    nr = r * color[0];                                              \
    ng = g * color[1];                                              \
    nb = b * color[2];                                              \
                                                                    \
    nr = lerpf(r, nr, mix);                                         \
    ng = lerpf(g, ng, mix);                                         \
    nb = lerpf(b, nb, mix);                                         \
                                                                    \
    l0 = (FFMAX3(r, g, b) + FFMIN3(r, g, b)) + FLT_EPSILON;         \
    l1 = (FFMAX3(nr, ng, nb) + FFMIN3(nr, ng, nb)) + FLT_EPSILON;   \
    l = l0 / l1;                                                    \
                                                                    \
    r = nr * l;                                                     \
    g = ng * l;                                                     \
    b = nb * l;                                                     \
                                                                    \
    nr = lerpf(nr, r, preserve);                                    \
    ng = lerpf(ng, g, preserve);                                    \
    nb = lerpf(nb, b, preserve);

Definition at line 83 of file vf_colortemperature.c.

OFFSET

#define OFFSET

(

x

)

offsetof(ColorTemperatureContext, x)

Definition at line 348 of file vf_colortemperature.c.

VF

#define VF   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 349 of file vf_colortemperature.c.

Function Documentation

saturate()

static float saturate ( float  input )

static

Definition at line 52 of file vf_colortemperature.c.

Referenced by kelvin2rgb().

kelvin2rgb()

static void kelvin2rgb ( float  k, float *  rgb  )

static

Definition at line 57 of file vf_colortemperature.c.

Referenced by filter_frame().

lerpf()

static float lerpf ( float  v0, float  v1, float  f  )

static

Definition at line 78 of file vf_colortemperature.c.

temperature_slice8()

static int temperature_slice8 ( AVFilterContext *  ctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 104 of file vf_colortemperature.c.

Referenced by config_input().

temperature_slice16()

static int temperature_slice16 ( AVFilterContext *  ctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 145 of file vf_colortemperature.c.

Referenced by config_input().

temperature_slice8p()

static int temperature_slice8p ( AVFilterContext *  ctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 187 of file vf_colortemperature.c.

Referenced by config_input().

temperature_slice16p()

static int temperature_slice16p ( AVFilterContext *  ctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 226 of file vf_colortemperature.c.

Referenced by config_input().

filter_frame()

static int filter_frame ( AVFilterLink *  inlink, AVFrame *  frame  )

static

Definition at line 266 of file vf_colortemperature.c.

query_formats()

static av_cold int query_formats ( AVFilterContext *  ctx )

static

Definition at line 279 of file vf_colortemperature.c.

config_input()

static av_cold int config_input ( AVFilterLink *  inlink )

static

Definition at line 305 of file vf_colortemperature.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

colortemperature

)

Variable Documentation

inputs

const AVFilterPad inputs[]

static

Initial value:

= {
    {
        .name           = "default",
        .type           = AVMEDIA_TYPE_VIDEO,
        .filter_frame   = filter_frame,
        .config_props   = config_input,
        .needs_writable = 1,
    },
    { NULL }
}

Definition at line 329 of file vf_colortemperature.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 340 of file vf_colortemperature.c.

colortemperature_options

const AVOption colortemperature_options[]

static

Initial value:

= {
    { "temperature", "set the temperature in Kelvin",          OFFSET(temperature), AV_OPT_TYPE_FLOAT, {.dbl=6500}, 1000,  40000, VF },
    { "mix",         "set the mix with filtered output",       OFFSET(mix),         AV_OPT_TYPE_FLOAT, {.dbl=1},       0,      1, VF },
    { "pl",          "set the amount of preserving lightness", OFFSET(preserve),    AV_OPT_TYPE_FLOAT, {.dbl=0},       0,      1, VF },
    { NULL }
}

Definition at line 351 of file vf_colortemperature.c.

ff_vf_colortemperature

AVFilter ff_vf_colortemperature

Initial value:

= {
    .name          = "colortemperature",
    .description   = NULL_IF_CONFIG_SMALL("Adjust color temperature of video."),
    .priv_size     = sizeof(ColorTemperatureContext),
    .priv_class    = &colortemperature_class,
    .query_formats = query_formats,
    .inputs        = inputs,
    .outputs       = outputs,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
    .process_command = ff_filter_process_command,
}

Definition at line 360 of file vf_colortemperature.c.