FFmpeg: libavfilter/vf_blackdetect.c File Reference

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libavfilter

Data Structures | Macros | Functions | Variables

vf_blackdetect.c File Reference

Video black detector, loosely based on blackframe with extended syntax and features. More...

#include <float.h>
#include "libavutil/opt.h"
#include "libavutil/timestamp.h"
#include "avfilter.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct BlackDetectContext

Macros

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

#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

#define YUVJ_FORMATS AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P

Functions

AVFILTER_DEFINE_CLASS (blackdetect)

static int query_formats (AVFilterContext *ctx)

static int config_input (AVFilterLink *inlink)

static void check_black_end (AVFilterContext *ctx)

static int request_frame (AVFilterLink *outlink)

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

Variables

static const AVOption blackdetect_options []

static enum AVPixelFormat yuvj_formats []

static const AVFilterPad blackdetect_inputs []

static const AVFilterPad blackdetect_outputs []

AVFilter ff_vf_blackdetect

Detailed Description

Video black detector, loosely based on blackframe with extended syntax and features.

Definition in file vf_blackdetect.c.

Macro Definition Documentation

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

Definition at line 49 of file vf_blackdetect.c.

#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 50 of file vf_blackdetect.c.

#define YUVJ_FORMATS AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P

Definition at line 64 of file vf_blackdetect.c.

Referenced by query_formats().

Function Documentation

AVFILTER_DEFINE_CLASS ( blackdetect )

static int query_formats ( AVFilterContext * ctx )

static

Definition at line 71 of file vf_blackdetect.c.

static int config_input ( AVFilterLink * inlink )

static

Definition at line 87 of file vf_blackdetect.c.

static void check_black_end ( AVFilterContext * ctx )

static

Definition at line 108 of file vf_blackdetect.c.

Referenced by filter_frame(), and request_frame().

static int request_frame ( AVFilterLink * outlink )

static

Definition at line 122 of file vf_blackdetect.c.

static int filter_frame ( AVFilterLink * inlink,

AVFrame * picref

)

static

Definition at line 138 of file vf_blackdetect.c.

Variable Documentation

const AVOption blackdetect_options[]

static

Initial value:

= {

{ "d", "set minimum detected black duration in seconds", OFFSET(black_min_duration_time), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, DBL_MAX, FLAGS },

{ "black_min_duration", "set minimum detected black duration in seconds", OFFSET(black_min_duration_time), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 0, DBL_MAX, FLAGS },

{ "picture_black_ratio_th", "set the picture black ratio threshold", OFFSET(picture_black_ratio_th), AV_OPT_TYPE_DOUBLE, {.dbl=.98}, 0, 1, FLAGS },

{ "pic_th", "set the picture black ratio threshold", OFFSET(picture_black_ratio_th), AV_OPT_TYPE_DOUBLE, {.dbl=.98}, 0, 1, FLAGS },

{ "pixel_black_th", "set the pixel black threshold", OFFSET(pixel_black_th), AV_OPT_TYPE_DOUBLE, {.dbl=.10}, 0, 1, FLAGS },

{ "pix_th", "set the pixel black threshold", OFFSET(pixel_black_th), AV_OPT_TYPE_DOUBLE, {.dbl=.10}, 0, 1, FLAGS },

{ NULL }

}

Definition at line 52 of file vf_blackdetect.c.

enum AVPixelFormat yuvj_formats[]

static

Initial value:

= {

YUVJ_FORMATS, AV_PIX_FMT_NONE

}

Definition at line 67 of file vf_blackdetect.c.

Referenced by config_input().

const AVFilterPad blackdetect_inputs[]

static

Initial value:

= {

{

.name = "default",

.type = AVMEDIA_TYPE_VIDEO,

.config_props = config_input,

.filter_frame = filter_frame,

},

{ NULL }

}

Definition at line 182 of file vf_blackdetect.c.

const AVFilterPad blackdetect_outputs[]

static

Initial value:

= {

{

.name = "default",

.type = AVMEDIA_TYPE_VIDEO,

.request_frame = request_frame,

},

{ NULL }

}

Definition at line 192 of file vf_blackdetect.c.

AVFilter ff_vf_blackdetect

Initial value:

= {

.name = "blackdetect",

.description = NULL_IF_CONFIG_SMALL("Detect video intervals that are (almost) black."),

.priv_size = sizeof(BlackDetectContext),

.query_formats = query_formats,

.inputs = blackdetect_inputs,

.outputs = blackdetect_outputs,

.priv_class = &blackdetect_class,

}

Definition at line 201 of file vf_blackdetect.c.

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