vf_fade.c File Reference

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

#include "libavutil/avassert.h"
#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 "formats.h"
#include "internal.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	FADE_IN   0
#define	FADE_OUT   1
#define	INTERP(c_name, c_idx)   av_clip_uint8(((c[c_idx]<<16) + ((int)p[c_name] - (int)c[c_idx]) * s->factor + (1<<15)) >> 16)
#define	OFFSET(x)   offsetof(FadeContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Functions
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_props (AVFilterLink *inlink)
static av_always_inline void	filter_rgb (FadeContext *s, const AVFrame *frame, int slice_start, int slice_end, int do_alpha, int step)
static int	filter_slice_rgb (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_slice_luma (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_slice_chroma (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_slice_alpha (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *frame)
	AVFILTER_DEFINE_CLASS (fade)

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

R

#define R   0

Definition at line 40 of file vf_fade.c.

Referenced by filter_rgb().

G

#define G   1

Definition at line 41 of file vf_fade.c.

Referenced by filter_rgb().

B

#define B   2

Definition at line 42 of file vf_fade.c.

Referenced by filter_rgb().

A

#define A   3

Definition at line 43 of file vf_fade.c.

Referenced by filter_rgb(), and filter_slice_alpha().

Y

#define Y   0

Definition at line 45 of file vf_fade.c.

U

#define U   1

Definition at line 46 of file vf_fade.c.

V

#define V   2

Definition at line 47 of file vf_fade.c.

FADE_IN

#define FADE_IN   0

Definition at line 49 of file vf_fade.c.

Referenced by init().

FADE_OUT

#define FADE_OUT   1

Definition at line 50 of file vf_fade.c.

Referenced by filter_frame().

INTERP

#define INTERP	(		c_name,
			c_idx
	)		av_clip_uint8(((c[c_idx]<<16) + ((int)p[c_name] - (int)c[c_idx]) * s->factor + (1<<15)) >> 16)

Referenced by filter_rgb().

OFFSET

#define OFFSET

(

x

)

offsetof(FadeContext, x)

Definition at line 371 of file vf_fade.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 372 of file vf_fade.c.

Function Documentation

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 68 of file vf_fade.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 98 of file vf_fade.c.

config_props()

static int config_props ( AVFilterLink *  inlink )

static

Definition at line 154 of file vf_fade.c.

filter_rgb()

static av_always_inline void filter_rgb ( FadeContext *  s, const AVFrame *  frame, int  slice_start, int  slice_end, int  do_alpha, int  step  )

static

Definition at line 177 of file vf_fade.c.

Referenced by filter_slice_rgb().

filter_slice_rgb()

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

static

Definition at line 202 of file vf_fade.c.

Referenced by filter_frame().

filter_slice_luma()

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

static

Definition at line 218 of file vf_fade.c.

Referenced by filter_frame().

filter_slice_chroma()

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

static

Definition at line 241 of file vf_fade.c.

Referenced by filter_frame().

filter_slice_alpha()

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

static

Definition at line 268 of file vf_fade.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 293 of file vf_fade.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

fade

)

Variable Documentation

studio_level_pix_fmts

const enum AVPixelFormat studio_level_pix_fmts[]

static

Initial value:

= {
    AV_PIX_FMT_YUV444P,  AV_PIX_FMT_YUV422P,  AV_PIX_FMT_YUV420P,
    AV_PIX_FMT_YUV411P,  AV_PIX_FMT_YUV410P,
    AV_PIX_FMT_YUV440P,
    AV_PIX_FMT_NONE
}

Definition at line 147 of file vf_fade.c.

Referenced by config_props().

fade_options

const AVOption fade_options[]

static

Initial value:

= {
    { "type", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
    { "t",    "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
        { "in",  "fade-in",  0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN },  .unit = "type" },
        { "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .unit = "type" },
    { "start_frame", "Number of the first frame to which to apply the effect.",
                                                    OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
    { "s",           "Number of the first frame to which to apply the effect.",
                                                    OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
    { "nb_frames",   "Number of frames to which the effect should be applied.",
                                                    OFFSET(nb_frames),   AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS },
    { "n",           "Number of frames to which the effect should be applied.",
                                                    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_BOOL, {.i64 = 0    }, 0,       1, FLAGS },
    { "start_time",  "Number of seconds of the beginning of the effect.",
                                                    OFFSET(start_time),  AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
    { "st",          "Number of seconds of the beginning of the effect.",
                                                    OFFSET(start_time),  AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
    { "duration",    "Duration of the effect in seconds.",
                                                    OFFSET(duration),    AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
    { "d",           "Duration of the effect in seconds.",
                                                    OFFSET(duration),    AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
    { "color",       "set color",                   OFFSET(color_rgba),  AV_OPT_TYPE_COLOR,    {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "c",           "set color",                   OFFSET(color_rgba),  AV_OPT_TYPE_COLOR,    {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { NULL }
}

Definition at line 374 of file vf_fade.c.

avfilter_vf_fade_inputs

const AVFilterPad avfilter_vf_fade_inputs[]

static

Initial value:

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

Definition at line 403 of file vf_fade.c.

avfilter_vf_fade_outputs

const AVFilterPad avfilter_vf_fade_outputs[]

static

Initial value:

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

Definition at line 414 of file vf_fade.c.

ff_vf_fade

AVFilter ff_vf_fade

Initial value:

= {
    .name          = "fade",
    .description   = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
    .init          = init,
    .priv_size     = sizeof(FadeContext),
    .priv_class    = &fade_class,
    .query_formats = query_formats,
    .inputs        = avfilter_vf_fade_inputs,
    .outputs       = avfilter_vf_fade_outputs,
    .flags         = AVFILTER_FLAG_SLICE_THREADS,
}

Definition at line 422 of file vf_fade.c.