FFmpeg
Data Structures | Macros | Functions | Variables
vf_fade.c File Reference
#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 "filters.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 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 INTERPP(c_name, c_idx)   av_clip_uint8(((c[c_idx]<<16) + ((int)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 av_always_inline void filter_rgb (FadeContext *s, const AVFrame *frame, int slice_start, int slice_end, int do_alpha, int step)
 
static av_always_inline void filter_rgb_planar (FadeContext *s, const AVFrame *frame, int slice_start, int slice_end, int do_alpha)
 
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_luma16 (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_chroma16 (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_slice_alpha16 (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
 
static int config_input (AVFilterLink *inlink)
 
static int filter_frame (AVFilterLink *inlink, AVFrame *frame)
 
 AVFILTER_DEFINE_CLASS (fade)
 

Variables

const static enum AVPixelFormat studio_level_pix_fmts []
 
static const AVOption fade_options []
 
static const AVFilterPad avfilter_vf_fade_inputs []
 
const 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.

◆ G

#define G   1

Definition at line 41 of file vf_fade.c.

◆ B

#define B   2

Definition at line 42 of file vf_fade.c.

◆ A

#define A   3

Definition at line 43 of file vf_fade.c.

◆ 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.

◆ FADE_OUT

#define FADE_OUT   1

Definition at line 50 of file vf_fade.c.

◆ 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)

◆ INTERPP

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

◆ OFFSET

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

Definition at line 519 of file vf_fade.c.

◆ FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 520 of file vf_fade.c.

Function Documentation

◆ init()

static av_cold int init ( AVFilterContext *  ctx)
static

Definition at line 74 of file vf_fade.c.

◆ query_formats()

static int query_formats ( AVFilterContext *  ctx)
static

Definition at line 104 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 184 of file vf_fade.c.

Referenced by filter_slice_rgb().

◆ filter_rgb_planar()

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

Definition at line 209 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 232 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 252 of file vf_fade.c.

Referenced by config_input().

◆ filter_slice_luma16()

static int filter_slice_luma16 ( AVFilterContext *  ctx,
void *  arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 277 of file vf_fade.c.

Referenced by config_input().

◆ filter_slice_chroma()

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

Definition at line 302 of file vf_fade.c.

Referenced by config_input().

◆ filter_slice_chroma16()

static int filter_slice_chroma16 ( AVFilterContext *  ctx,
void *  arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 329 of file vf_fade.c.

Referenced by config_input().

◆ filter_slice_alpha()

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

Definition at line 355 of file vf_fade.c.

Referenced by config_input().

◆ filter_slice_alpha16()

static int filter_slice_alpha16 ( AVFilterContext *  ctx,
void *  arg,
int  jobnr,
int  nb_jobs 
)
static

Definition at line 380 of file vf_fade.c.

Referenced by config_input().

◆ config_input()

static int config_input ( AVFilterLink *  inlink)
static

Definition at line 405 of file vf_fade.c.

◆ filter_frame()

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

Definition at line 443 of file vf_fade.c.

◆ AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS ( fade  )

Variable Documentation

◆ studio_level_pix_fmts

const static 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_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_NONE
}

Definition at line 168 of file vf_fade.c.

Referenced by config_input().

◆ fade_options

const AVOption fade_options[]
static
Initial value:
= {
{ "type", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, .unit = "type" },
{ "t", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, .unit = "type" },
{ "in", "fade-in", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN }, .flags = FLAGS, .unit = "type" },
{ "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .flags = FLAGS, .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 }, 1, INT_MAX, FLAGS },
{ "n", "Number of frames to which the effect should be applied.",
OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 1, 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, INT64_MAX, FLAGS },
{ "st", "Number of seconds of the beginning of the effect.",
OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
{ "duration", "Duration of the effect in seconds.",
OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
{ "d", "Duration of the effect in seconds.",
OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
{ "color", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS },
{ "c", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS },
{ NULL }
}

Definition at line 522 of file vf_fade.c.

◆ avfilter_vf_fade_inputs

const AVFilterPad avfilter_vf_fade_inputs[]
static
Initial value:
= {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
.config_props = config_input,
.filter_frame = filter_frame,
},
}

Definition at line 551 of file vf_fade.c.

◆ ff_vf_fade

const 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,
FILTER_INPUTS(avfilter_vf_fade_inputs),
FILTER_OUTPUTS(ff_video_default_filterpad),
FILTER_QUERY_FUNC(query_formats),
.flags = AVFILTER_FLAG_SLICE_THREADS |
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
}

Definition at line 561 of file vf_fade.c.

AV_PIX_FMT_YUVA422P16
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:522
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_fade.c:74
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_fade.c:104
AV_PIX_FMT_YUVA422P9
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:514
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: filters.h:262
AV_PIX_FMT_YUVA420P16
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:521
AV_PIX_FMT_YUVA420P10
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:516
AV_OPT_TYPE_DURATION
@ AV_OPT_TYPE_DURATION
Underlying C type is int64_t.
Definition: opt.h:319
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:478
AV_PIX_FMT_YUV440P
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:106
AV_PIX_FMT_YUVA422P10
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:517
AV_PIX_FMT_YUVA420P9
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:513
AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:523
AV_PIX_FMT_YUV422P9
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:476
avfilter_vf_fade_inputs
static const AVFilterPad avfilter_vf_fade_inputs[]
Definition: vf_fade.c:551
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:481
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:490
ff_video_default_filterpad
const AVFilterPad ff_video_default_filterpad[1]
An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_VIDEO.
Definition: video.c:37
duration
int64_t duration
Definition: movenc.c:65
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:491
AV_PIX_FMT_YUVA444P12
#define AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:520
AV_PIX_FMT_YUV420P9
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:475
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:489
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:73
FLAGS
#define FLAGS
Definition: vf_fade.c:520
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: filters.h:263
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_COLOR
@ AV_OPT_TYPE_COLOR
Underlying C type is uint8_t[4].
Definition: opt.h:323
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:479
AVFILTERPAD_FLAG_NEEDS_WRITABLE
#define AVFILTERPAD_FLAG_NEEDS_WRITABLE
The filter expects writable frames from its input link, duplicating data buffers if needed.
Definition: filters.h:57
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_fade.c:405
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:94
start_time
static int64_t start_time
Definition: ffplay.c:326
AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:483
FadeContext
Definition: vf_fade.c:52
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:485
AV_PIX_FMT_YUVA444P10
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:518
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:182
OFFSET
#define OFFSET(x)
Definition: vf_fade.c:519
AV_PIX_FMT_YUV444P9
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:477
FADE_IN
#define FADE_IN
Definition: vf_fade.c:49
AV_PIX_FMT_YUVA444P9
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:515
AV_PIX_FMT_YUV420P12
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:482
AV_PIX_FMT_YUV422P14
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:487
FADE_OUT
#define FADE_OUT
Definition: vf_fade.c:50
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
AV_PIX_FMT_YUVA422P12
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:519
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:78
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:152
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:77
alpha
static const int16_t alpha[]
Definition: ilbcdata.h:55
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Underlying C type is int.
Definition: opt.h:327
AV_PIX_FMT_YUV411P
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:80
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:79
AV_PIX_FMT_YUV440P12
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:484
AV_PIX_FMT_YUV444P14
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:488
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_fade.c:443
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: filters.h:236
AV_PIX_FMT_YUV420P14
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:486
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