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vf_fade.c File Reference

video fade filter based heavily on vf_negate.c by Bobby Bingham More...

#include "libavutil/avstring.h"
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "internal.h"
#include "formats.h"
#include "video.h"

Go to the source code of this file.

Data Structures

struct  FadeContext
 

Macros

#define R   0
 
#define G   1
 
#define B   2
 
#define A   3
 
#define Y   0
 
#define U   1
 
#define V   2
 
#define OFFSET(x)   offsetof(FadeContext, x)
 
#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
 

Functions

 AVFILTER_DEFINE_CLASS (fade)
 
static av_cold int init (AVFilterContext *ctx, const char *args)
 
static av_cold void uninit (AVFilterContext *ctx)
 
static int query_formats (AVFilterContext *ctx)
 
static int config_props (AVFilterLink *inlink)
 
static void fade_plane (int y, int h, int w, int fade_factor, int black_level, int black_level_scaled, uint8_t offset, uint8_t step, int bytes_per_plane, uint8_t *data, int line_size)
 
static int filter_frame (AVFilterLink *inlink, AVFilterBufferRef *frame)
 

Variables

static const AVOption fade_options []
 
static const enum AVPixelFormat studio_level_pix_fmts []
 
static const AVFilterPad avfilter_vf_fade_inputs []
 
static const AVFilterPad avfilter_vf_fade_outputs []
 
AVFilter avfilter_vf_fade
 

Detailed Description

video fade filter based heavily on vf_negate.c by Bobby Bingham

Definition in file vf_fade.c.

Macro Definition Documentation

#define R   0

Definition at line 40 of file vf_fade.c.

#define G   1

Definition at line 41 of file vf_fade.c.

#define B   2

Definition at line 42 of file vf_fade.c.

#define A   3

Definition at line 43 of file vf_fade.c.

#define Y   0

Definition at line 45 of file vf_fade.c.

#define U   1

Definition at line 46 of file vf_fade.c.

#define V   2

Definition at line 47 of file vf_fade.c.

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

Definition at line 62 of file vf_fade.c.

Definition at line 63 of file vf_fade.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( fade  )
static av_cold int init ( AVFilterContext ctx,
const char *  args 
)
static

Definition at line 78 of file vf_fade.c.

static av_cold void uninit ( AVFilterContext ctx)
static

Definition at line 109 of file vf_fade.c.

static int query_formats ( AVFilterContext ctx)
static

Definition at line 116 of file vf_fade.c.

static int config_props ( AVFilterLink inlink)
static

Definition at line 141 of file vf_fade.c.

static void fade_plane ( int  y,
int  h,
int  w,
int  fade_factor,
int  black_level,
int  black_level_scaled,
uint8_t  offset,
uint8_t  step,
int  bytes_per_plane,
uint8_t data,
int  line_size 
)
static

Definition at line 162 of file vf_fade.c.

Referenced by filter_frame().

static int filter_frame ( AVFilterLink inlink,
AVFilterBufferRef frame 
)
static

Definition at line 181 of file vf_fade.c.

Variable Documentation

const AVOption fade_options[]
static
Initial value:
= {
{ "type", "set the fade direction", OFFSET(type), AV_OPT_TYPE_STRING, {.str = "in" }, CHAR_MIN, CHAR_MAX, FLAGS },
{ "t", "set the fade direction", OFFSET(type), AV_OPT_TYPE_STRING, {.str = "in" }, CHAR_MIN, CHAR_MAX, FLAGS },
{ "start_frame", "set expression of frame to start fading", OFFSET(start_frame), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, FLAGS },
{ "s", "set expression of frame to start fading", OFFSET(start_frame), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, FLAGS },
{ "nb_frames", "set expression for fade duration in frames", OFFSET(nb_frames), AV_OPT_TYPE_INT, {.i64 = 25 }, 0, INT_MAX, FLAGS },
{ "n", "set expression for fade duration in frames", OFFSET(nb_frames), AV_OPT_TYPE_INT, {.i64 = 25 }, 0, INT_MAX, FLAGS },
{ "alpha", "fade alpha if it is available on the input", OFFSET(alpha), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS },
{NULL},
}

Definition at line 65 of file vf_fade.c.

const enum AVPixelFormat studio_level_pix_fmts[]
static
const AVFilterPad avfilter_vf_fade_inputs[]
static
Initial value:
= {
{
.name = "default",
.config_props = config_props,
.get_video_buffer = ff_null_get_video_buffer,
.filter_frame = filter_frame,
.min_perms = AV_PERM_READ | AV_PERM_WRITE,
},
{ NULL }
}

Definition at line 230 of file vf_fade.c.

const AVFilterPad avfilter_vf_fade_outputs[]
static
Initial value:
= {
{
.name = "default",
},
{ NULL }
}

Definition at line 242 of file vf_fade.c.

AVFilter avfilter_vf_fade
Initial value:
= {
.name = "fade",
.description = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
.init = init,
.uninit = uninit,
.priv_size = sizeof(FadeContext),
.priv_class = &fade_class,
}

Definition at line 250 of file vf_fade.c.