vf_lenscorrection.c File Reference

#include <stdlib.h>
#include <math.h>
#include "libavutil/colorspace.h"
#include "libavutil/opt.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	LenscorrectionCtx
struct	ThreadData
	Used for passing data between threads. More...

Macros
#define	OFFSET(x)   offsetof(LenscorrectionCtx, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
#define	NEAREST(type, name)
#define	BILINEAR(type, name)

Functions
	AVFILTER_DEFINE_CLASS (lenscorrection)
static int	query_formats (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static void	calc_correction (AVFilterContext *ctx, int plane)
static int	config_output (AVFilterLink *outlink)
static int	filter_slice (AVFilterContext *ctx, void *arg, int job, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)

Variables
static const AVOption	lenscorrection_options []
static const AVFilterPad	lenscorrection_inputs []
static const AVFilterPad	lenscorrection_outputs []
AVFilter	ff_vf_lenscorrection

Detailed Description

Lenscorrection filter, algorithm from the frei0r plugin with the same name

Definition in file vf_lenscorrection.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(LenscorrectionCtx, x)

Definition at line 55 of file vf_lenscorrection.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 56 of file vf_lenscorrection.c.

NEAREST

#define NEAREST	(		type,
			name
	)

Definition at line 75 of file vf_lenscorrection.c.

BILINEAR

#define BILINEAR	(		type,
			name
	)

Definition at line 114 of file vf_lenscorrection.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

lenscorrection

)

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 178 of file vf_lenscorrection.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 212 of file vf_lenscorrection.c.

calc_correction()

static void calc_correction ( AVFilterContext *  ctx, int  plane  )

static

Definition at line 222 of file vf_lenscorrection.c.

Referenced by config_output().

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 246 of file vf_lenscorrection.c.

Referenced by process_command().

filter_slice()

static int filter_slice ( AVFilterContext *  ctx, void *  arg, int  job, int  nb_jobs  )

static

Definition at line 294 of file vf_lenscorrection.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 305 of file vf_lenscorrection.c.

process_command()

static int process_command ( AVFilterContext *  ctx, const char *  cmd, const char *  arg, char *  res, int  res_len, int  flags  )

static

Definition at line 327 of file vf_lenscorrection.c.

Variable Documentation

lenscorrection_options

const AVOption lenscorrection_options[]

static

Initial value:

= {
    { "cx", "set relative center x", OFFSET(cx), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 1, .flags=FLAGS },
    { "cy", "set relative center y", OFFSET(cy), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 1, .flags=FLAGS },
    { "k1", "set quadratic distortion factor", OFFSET(k1), AV_OPT_TYPE_DOUBLE, {.dbl=0.0}, -1, 1, .flags=FLAGS },
    { "k2", "set double quadratic distortion factor", OFFSET(k2), AV_OPT_TYPE_DOUBLE, {.dbl=0.0}, -1, 1, .flags=FLAGS },
    { "i",  "set interpolation type", OFFSET(interpolation), AV_OPT_TYPE_INT, {.i64=0}, 0, 64, .flags=FLAGS, "i" },
    {  "nearest",  "nearest neighbour", 0,                   AV_OPT_TYPE_CONST, {.i64=0},0, 0, .flags=FLAGS, "i" },
    {  "bilinear", "bilinear",          0,                   AV_OPT_TYPE_CONST, {.i64=1},0, 0, .flags=FLAGS, "i" },
    { "fc", "set the color of the unmapped pixels", OFFSET(fill_rgba), AV_OPT_TYPE_COLOR, {.str="black@0"}, .flags = FLAGS },
    { NULL }
}

Definition at line 57 of file vf_lenscorrection.c.

lenscorrection_inputs

const AVFilterPad lenscorrection_inputs[]

static

Initial value:

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

Definition at line 342 of file vf_lenscorrection.c.

lenscorrection_outputs

const AVFilterPad lenscorrection_outputs[]

static

Initial value:

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

Definition at line 351 of file vf_lenscorrection.c.

ff_vf_lenscorrection

AVFilter ff_vf_lenscorrection

Initial value:

= {
    .name          = "lenscorrection",
    .description   = NULL_IF_CONFIG_SMALL("Rectify the image by correcting for lens distortion."),
    .priv_size     = sizeof(LenscorrectionCtx),
    .query_formats = query_formats,
    .inputs        = lenscorrection_inputs,
    .outputs       = lenscorrection_outputs,
    .priv_class    = &lenscorrection_class,
    .uninit        = uninit,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
    .process_command = process_command,
}

Definition at line 360 of file vf_lenscorrection.c.