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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

#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 FADE_IN   0

Definition at line 49 of file vf_fade.c.

Referenced by init().

#define FADE_OUT   1

Definition at line 50 of file vf_fade.c.

Referenced by filter_frame().

#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().

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

Definition at line 348 of file vf_fade.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 349 of file vf_fade.c.

Function Documentation

static av_cold int init ( AVFilterContext *  ctx)
static

Definition at line 68 of file vf_fade.c.

static int query_formats ( AVFilterContext *  ctx)
static

Definition at line 98 of file vf_fade.c.

static int config_props ( AVFilterLink *  inlink)
static

Definition at line 133 of file vf_fade.c.

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 154 of file vf_fade.c.

Referenced by filter_slice_rgb().

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

Definition at line 179 of file vf_fade.c.

Referenced by filter_frame().

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

Definition at line 195 of file vf_fade.c.

Referenced by filter_frame().

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

Definition at line 218 of file vf_fade.c.

Referenced by filter_frame().

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

Definition at line 245 of file vf_fade.c.

Referenced by filter_frame().

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

Definition at line 270 of file vf_fade.c.

AVFILTER_DEFINE_CLASS ( fade  )

Variable Documentation

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 126 of file vf_fade.c.

Referenced by config_props().

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_INT, {.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 351 of file vf_fade.c.

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 380 of file vf_fade.c.

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

Definition at line 391 of file vf_fade.c.

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 399 of file vf_fade.c.

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