vf_cropdetect.c File Reference

border detection filter Ported from MPlayer libmpcodecs/vf_cropdetect.c. More...

#include <stdio.h>
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	CropDetectContext

Macros
#define	OFFSET(x)   offsetof(CropDetectContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM

Functions
static int	query_formats (AVFilterContext *ctx)
static int	checkline (void *ctx, const unsigned char *src, int stride, int len, int bpp)
static av_cold int	init (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *frame)

Variables
static const AVOption	options []
static const AVClass	cropdetect_class
static const AVFilterPad	avfilter_vf_cropdetect_inputs []
static const AVFilterPad	avfilter_vf_cropdetect_outputs []
AVFilter	ff_vf_cropdetect

Detailed Description

border detection filter Ported from MPlayer libmpcodecs/vf_cropdetect.c.

Definition in file vf_cropdetect.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(CropDetectContext, x)

Definition at line 196 of file vf_cropdetect.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM

Definition at line 197 of file vf_cropdetect.c.

Function Documentation

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 47 of file vf_cropdetect.c.

static int checkline ( void *  ctx, const unsigned char *  src, int  stride, int  len, int  bpp  )

static

Definition at line 62 of file vf_cropdetect.c.

Referenced by filter_frame().

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 89 of file vf_cropdetect.c.

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 101 of file vf_cropdetect.c.

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

static

Definition at line 117 of file vf_cropdetect.c.

Variable Documentation

const AVOption options[]

static

Initial value:

= {
    { "limit", "Threshold below which the pixel is considered black", OFFSET(limit),       AV_OPT_TYPE_INT, { .i64 = 24 }, 0, INT_MAX, FLAGS },
    { "round", "Value by which the width/height should be divisible", OFFSET(round),       AV_OPT_TYPE_INT, { .i64 = 0  }, 0, INT_MAX, FLAGS },
    { "reset", "Recalculate the crop area after this many frames",    OFFSET(reset_count), AV_OPT_TYPE_INT, { .i64 = 0 },  0, INT_MAX, FLAGS },
    { NULL },
}

Definition at line 198 of file vf_cropdetect.c.

const AVClass cropdetect_class

static

Initial value:

= {
    .class_name = "cropdetect",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 205 of file vf_cropdetect.c.

const AVFilterPad avfilter_vf_cropdetect_inputs[]

static

Initial value:

= {
    {
        .name             = "default",
        .type             = AVMEDIA_TYPE_VIDEO,
        .config_props     = config_input,
        .get_video_buffer = ff_null_get_video_buffer,
        .filter_frame     = filter_frame,
    },
    { NULL }
}

Definition at line 212 of file vf_cropdetect.c.

const AVFilterPad avfilter_vf_cropdetect_outputs[]

static

Initial value:

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

Definition at line 223 of file vf_cropdetect.c.

AVFilter ff_vf_cropdetect

Initial value:

= {
    .name        = "cropdetect",
    .description = NULL_IF_CONFIG_SMALL("Auto-detect crop size."),

    .priv_size = sizeof(CropDetectContext),
    .priv_class = &cropdetect_class,
    .init      = init,

    .query_formats = query_formats,

    .inputs    = avfilter_vf_cropdetect_inputs,

    .outputs   = avfilter_vf_cropdetect_outputs,
}

Definition at line 231 of file vf_cropdetect.c.