vf_find_rect.c File Reference

#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "internal.h"
#include "lavfutils.h"

Go to the source code of this file.

Data Structures
struct	FOCContext

Macros
#define	MAX_MIPMAPS   5
#define	OFFSET(x)   offsetof(FOCContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Functions
	AVFILTER_DEFINE_CLASS (find_rect)
static int	query_formats (AVFilterContext *ctx)
static AVFrame *	downscale (AVFrame *in)
static float	compare (const AVFrame *haystack, const AVFrame *obj, int offx, int offy)
static int	config_input (AVFilterLink *inlink)
static float	search (FOCContext *foc, int pass, int maxpass, int xmin, int xmax, int ymin, int ymax, int *best_x, int *best_y, float best_score)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static av_cold void	uninit (AVFilterContext *ctx)
static av_cold int	init (AVFilterContext *ctx)

Variables
static const AVOption	find_rect_options []
static const AVFilterPad	foc_inputs []
static const AVFilterPad	foc_outputs []
AVFilter	ff_vf_find_rect

Macro Definition Documentation

#define MAX_MIPMAPS   5

Todo:

switch to dualinput

Definition at line 31 of file vf_find_rect.c.

Referenced by filter_frame(), and uninit().

#define OFFSET

(

x

)

offsetof(FOCContext, x)

Definition at line 45 of file vf_find_rect.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 46 of file vf_find_rect.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

find_rect

)

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 60 of file vf_find_rect.c.

static AVFrame* downscale ( AVFrame *  in )

static

Definition at line 71 of file vf_find_rect.c.

Referenced by filter_frame(), and init().

static float compare ( const AVFrame *  haystack, const AVFrame *  obj, int  offx, int  offy  )

static

Definition at line 104 of file vf_find_rect.c.

Referenced by ff_interleave_add_packet(), and search().

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 142 of file vf_find_rect.c.

static float search ( FOCContext *  foc, int  pass, int  maxpass, int  xmin, int  xmax, int  ymin, int  ymax, int *  best_x, int *  best_y, float  best_score  )

static

Definition at line 155 of file vf_find_rect.c.

Referenced by filter_frame().

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

static

Definition at line 181 of file vf_find_rect.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 226 of file vf_find_rect.c.

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 241 of file vf_find_rect.c.

Variable Documentation

const AVOption find_rect_options[]

static

Initial value:

= {
    { "object", "object bitmap filename", OFFSET(obj_filename), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS },
    { "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl = 0.5}, 0, 1.0, FLAGS },
    { "mipmaps", "set mipmaps", OFFSET(mipmaps), AV_OPT_TYPE_INT, {.i64 = 3}, 1, MAX_MIPMAPS, FLAGS },
    { "xmin", "", OFFSET(xmin), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
    { "ymin", "", OFFSET(ymin), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
    { "xmax", "", OFFSET(xmax), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
    { "ymax", "", OFFSET(ymax), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
    { NULL }
}

Definition at line 47 of file vf_find_rect.c.

const AVFilterPad foc_inputs[]

static

Initial value:

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

Definition at line 275 of file vf_find_rect.c.

const AVFilterPad foc_outputs[]

static

Initial value:

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

Definition at line 285 of file vf_find_rect.c.

AVFilter ff_vf_find_rect

Initial value:

= {
    .name            = "find_rect",
    .description     = NULL_IF_CONFIG_SMALL("Find a user specified object."),
    .priv_size       = sizeof(FOCContext),
    .init            = init,
    .uninit          = uninit,
    .query_formats   = query_formats,
    .inputs          = foc_inputs,
    .outputs         = foc_outputs,
    .priv_class      = &find_rect_class,
}

Definition at line 293 of file vf_find_rect.c.