vsrc_gradients.c File Reference

#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "video.h"
#include "internal.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.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

Functions
	AVFILTER_DEFINE_CLASS (gradients)
static int	query_formats (AVFilterContext *ctx)
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[3][4], int nb_colors, float step)
static uint64_t	lerp_colors16 (uint8_t arr[3][4], int nb_colors, float step)
static float	project (float origin_x, float origin_y, float dest_x, float dest_y, int point_x, int point_y)
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	config_output (AVFilterLink *inlink)
static int	activate (AVFilterContext *ctx)

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

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(GradientsContext, x)

Definition at line 55 of file vsrc_gradients.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 56 of file vsrc_gradients.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

gradients

)

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 86 of file vsrc_gradients.c.

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[3][4], int  nb_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[3][4], int  nb_colors, float  step  )

static

Definition at line 138 of file vsrc_gradients.c.

Referenced by draw_gradients_slice16().

project()

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

static

Definition at line 156 of file vsrc_gradients.c.

Referenced by draw_gradients_slice(), and draw_gradients_slice16().

draw_gradients_slice()

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

static

Definition at line 176 of file vsrc_gradients.c.

draw_gradients_slice16()

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

static

Definition at line 199 of file vsrc_gradients.c.

config_output()

static int config_output ( AVFilterLink *  inlink )

static

Definition at line 220 of file vsrc_gradients.c.

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 251 of file vsrc_gradients.c.

Variable Documentation

gradients_options

const AVOption gradients_options[]

static

Initial value:

= {
    {"size",      "set frame size", OFFSET(w),             AV_OPT_TYPE_IMAGE_SIZE, {.str="640x480"},  0, 0, FLAGS },
    {"s",         "set frame size", OFFSET(w),             AV_OPT_TYPE_IMAGE_SIZE, {.str="640x480"},  0, 0, FLAGS },
    {"rate",      "set frame rate", OFFSET(frame_rate),    AV_OPT_TYPE_VIDEO_RATE, {.str="25"},       0, INT_MAX, FLAGS },
    {"r",         "set frame rate", OFFSET(frame_rate),    AV_OPT_TYPE_VIDEO_RATE, {.str="25"},       0, INT_MAX, FLAGS },
    {"c0",        "set 1st color",  OFFSET(color_rgba[0]), AV_OPT_TYPE_COLOR,      {.str = "random"}, 0, 0, FLAGS },
    {"c1",        "set 2nd color",  OFFSET(color_rgba[1]), AV_OPT_TYPE_COLOR,      {.str = "random"}, 0, 0, FLAGS },
    {"c2",        "set 3rd color",  OFFSET(color_rgba[2]), AV_OPT_TYPE_COLOR,      {.str = "random"}, 0, 0, FLAGS },
    {"c3",        "set 4th color",  OFFSET(color_rgba[3]), AV_OPT_TYPE_COLOR,      {.str = "random"}, 0, 0, FLAGS },
    {"c4",        "set 5th color",  OFFSET(color_rgba[4]), AV_OPT_TYPE_COLOR,      {.str = "random"}, 0, 0, FLAGS },
    {"c5",        "set 6th color",  OFFSET(color_rgba[5]), AV_OPT_TYPE_COLOR,      {.str = "random"}, 0, 0, FLAGS },
    {"c6",        "set 7th color",  OFFSET(color_rgba[6]), AV_OPT_TYPE_COLOR,      {.str = "random"}, 0, 0, FLAGS },
    {"c7",        "set 8th color",  OFFSET(color_rgba[7]), AV_OPT_TYPE_COLOR,      {.str = "random"}, 0, 0, FLAGS },
    {"x0",        "set gradient line source x0",      OFFSET(x0), AV_OPT_TYPE_INT, {.i64=-1},        -1, INT_MAX, FLAGS },
    {"y0",        "set gradient line source y0",      OFFSET(y0), AV_OPT_TYPE_INT, {.i64=-1},        -1, INT_MAX, FLAGS },
    {"x1",        "set gradient line destination x1", OFFSET(x1), AV_OPT_TYPE_INT, {.i64=-1},        -1, INT_MAX, FLAGS },
    {"y1",        "set gradient line destination y1", OFFSET(y1), AV_OPT_TYPE_INT, {.i64=-1},        -1, INT_MAX, FLAGS },
    {"nb_colors", "set the number of colors", OFFSET(nb_colors), AV_OPT_TYPE_INT,  {.i64=2},          2, 8, FLAGS },
    {"n",         "set the number of colors", OFFSET(nb_colors), AV_OPT_TYPE_INT,  {.i64=2},          2, 8, FLAGS },
    {"seed",      "set the seed",   OFFSET(seed),          AV_OPT_TYPE_INT64,      {.i64=-1},        -1, UINT32_MAX, FLAGS },
    {"duration",  "set video duration", OFFSET(duration),  AV_OPT_TYPE_DURATION,   {.i64=-1},        -1, INT64_MAX, FLAGS },
    {"d",         "set video duration", OFFSET(duration),  AV_OPT_TYPE_DURATION,   {.i64=-1},        -1, INT64_MAX, FLAGS },
    {"speed",     "set gradients rotation speed", OFFSET(speed), AV_OPT_TYPE_FLOAT,{.dbl=0.01}, 0.00001, 1, FLAGS },
    {NULL},
}

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,
    },
    { NULL }
}

Definition at line 292 of file vsrc_gradients.c.

ff_vsrc_gradients

AVFilter ff_vsrc_gradients

Initial value:

= {
    .name          = "gradients",
    .description   = NULL_IF_CONFIG_SMALL("Draw a gradients."),
    .priv_size     = sizeof(GradientsContext),
    .priv_class    = &gradients_class,
    .query_formats = query_formats,
    .inputs        = NULL,
    .outputs       = gradients_outputs,
    .activate      = activate,
    .flags         = AVFILTER_FLAG_SLICE_THREADS,
}

Definition at line 301 of file vsrc_gradients.c.