FFmpeg
Data Structures | Macros | Functions | Variables
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 []
 
const 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

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",
.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",
.config_props = config_output,
},
{ NULL }
}

Definition at line 351 of file vf_lenscorrection.c.

◆ ff_vf_lenscorrection

const 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),
.priv_class = &lenscorrection_class,
}

Definition at line 360 of file vf_lenscorrection.c.

uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_lenscorrection.c:212
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_lenscorrection.c:178
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:226
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
OFFSET
#define OFFSET(x)
Definition: vf_lenscorrection.c:55
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_COLOR
@ AV_OPT_TYPE_COLOR
Definition: opt.h:239
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_lenscorrection.c:305
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:116
interpolation
static int interpolation(DeclickChannel *c, const double *src, int ar_order, double *acoefficients, int *index, int nb_errors, double *auxiliary, double *interpolated)
Definition: af_adeclick.c:365
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:126
lenscorrection_outputs
static const AVFilterPad lenscorrection_outputs[]
Definition: vf_lenscorrection.c:351
lenscorrection_inputs
static const AVFilterPad lenscorrection_inputs[]
Definition: vf_lenscorrection.c:342
FLAGS
#define FLAGS
Definition: vf_lenscorrection.c:56
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Definition: vf_lenscorrection.c:327
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:117
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_lenscorrection.c:246
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:233
LenscorrectionCtx
Definition: vf_lenscorrection.c:39