vf_shear.c File Reference

#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "internal.h"
#include "video.h"
#include <float.h>

Go to the source code of this file.

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

Macros
#define	OFFSET(x)   offsetof(ShearContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
#define	NN(type, name)
#define	BL(type, name)

Functions
	AVFILTER_DEFINE_CLASS (shear)
static av_cold int	init (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	config_output (AVFilterLink *outlink)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)

Variables
static const AVOption	shear_options []
static const AVFilterPad	inputs []
static const AVFilterPad	outputs []
AVFilter	ff_vf_shear

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(ShearContext, x)

Definition at line 59 of file vf_shear.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 60 of file vf_shear.c.

NN

#define NN	(		type,
			name
	)

Definition at line 123 of file vf_shear.c.

BL

#define BL	(		type,
			name
	)

Definition at line 169 of file vf_shear.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

shear

)

init()

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 75 of file vf_shear.c.

Referenced by process_command().

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 88 of file vf_shear.c.

filter_frame()

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

static

Definition at line 228 of file vf_shear.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 255 of file vf_shear.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 279 of file vf_shear.c.

Variable Documentation

shear_options

const AVOption shear_options[]

static

Initial value:

= {
    { "shx",       "set x shear factor",        OFFSET(shx),           AV_OPT_TYPE_FLOAT,  {.dbl=0.},     -2, 2, .flags=FLAGS },
    { "shy",       "set y shear factor",        OFFSET(shy),           AV_OPT_TYPE_FLOAT,  {.dbl=0.},     -2, 2, .flags=FLAGS },
    { "fillcolor", "set background fill color", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str="black"}, 0, 0, .flags=FLAGS },
    { "c",         "set background fill color", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str="black"}, 0, 0, .flags=FLAGS },
    { "interp",    "set interpolation",         OFFSET(interp),        AV_OPT_TYPE_INT,    {.i64=1},       0, 1, .flags=FLAGS, "interp" },
    {  "nearest",  "nearest neighbour",         0,                     AV_OPT_TYPE_CONST,  {.i64=0},       0, 0, .flags=FLAGS, "interp" },
    {  "bilinear", "bilinear",                  0,                     AV_OPT_TYPE_CONST,  {.i64=1},       0, 0, .flags=FLAGS, "interp" },
    { NULL }
}

Definition at line 62 of file vf_shear.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

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

Definition at line 301 of file vf_shear.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 310 of file vf_shear.c.

ff_vf_shear

AVFilter ff_vf_shear

Initial value:

= {
    .name            = "shear",
    .description     = NULL_IF_CONFIG_SMALL("Shear transform the input image."),
    .priv_size       = sizeof(ShearContext),
    .init            = init,
    .query_formats   = query_formats,
    .inputs          = inputs,
    .outputs         = outputs,
    .priv_class      = &shear_class,
    .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
    .process_command = process_command,
}

Definition at line 319 of file vf_shear.c.