vf_crop.c File Reference

video crop filter More...

#include <stdio.h>
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "video.h"
#include "libavutil/eval.h"
#include "libavutil/avstring.h"
#include "libavutil/internal.h"
#include "libavutil/libm.h"
#include "libavutil/imgutils.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"

Go to the source code of this file.

Data Structures
struct	CropContext

Macros
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	TFLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Enumerations
enum	var_name {   VAR_IN_W , VAR_IW , VAR_IN_H , VAR_IH ,   VAR_OUT_W , VAR_OW , VAR_OUT_H , VAR_OH ,   VAR_A , VAR_SAR , VAR_DAR , VAR_HSUB ,   VAR_VSUB , VAR_X , VAR_Y , VAR_N ,   VAR_T , VAR_VARS_NB }

Functions
static int	query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
static av_cold void	uninit (AVFilterContext *ctx)
static int	normalize_double (int *n, double d)
static int	config_input (AVFilterLink *link)
static int	config_output (AVFilterLink *link)
static int	filter_frame (AVFilterLink *link, AVFrame *frame)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
	AVFILTER_DEFINE_CLASS (crop)

Variables
static const char *const	var_names []
static const AVOption	crop_options []
static const AVFilterPad	avfilter_vf_crop_inputs []
static const AVFilterPad	avfilter_vf_crop_outputs []
const FFFilter	ff_vf_crop

Detailed Description

video crop filter

Definition in file vf_crop.c.

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(CropContext, x)

Definition at line 353 of file vf_crop.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 354 of file vf_crop.c.

TFLAGS

#define TFLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 355 of file vf_crop.c.

Enumeration Type Documentation

var_name

enum var_name

Enumerator
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_X
VAR_Y
VAR_N
VAR_T
VAR_VARS_NB

Definition at line 57 of file vf_crop.c.

Function Documentation

query_formats()

static int query_formats ( const AVFilterContext * ctx, AVFilterFormatsConfig ** cfg_in, AVFilterFormatsConfig ** cfg_out )

static

Definition at line 92 of file vf_crop.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 102 of file vf_crop.c.

normalize_double()

static int normalize_double ( int * n, double d )

inlinestatic

Definition at line 112 of file vf_crop.c.

Referenced by config_input(), and filter_frame().

config_input()

static int config_input ( AVFilterLink * link )

static

Definition at line 127 of file vf_crop.c.

Referenced by process_command().

config_output()

static int config_output ( AVFilterLink * link )

static

Definition at line 233 of file vf_crop.c.

Referenced by process_command().

filter_frame()

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

static

Definition at line 250 of file vf_crop.c.

process_command()

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

static

Definition at line 317 of file vf_crop.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

crop

)

Variable Documentation

var_names

const char* const var_names[]

static

Initial value:

= {
    "in_w", "iw",   
    "in_h", "ih",   
    "out_w", "ow",  
    "out_h", "oh",  
    "a",
    "sar",
    "dar",
    "hsub",
    "vsub",
    "x",
    "y",
    "n",            
    "t",            
    NULL
}

Definition at line 40 of file vf_crop.c.

crop_options

const AVOption crop_options[]

static

Initial value:

= {
    { "out_w",       "set the width crop area expression",   OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, 0, 0, TFLAGS },
    { "w",           "set the width crop area expression",   OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, 0, 0, TFLAGS },
    { "out_h",       "set the height crop area expression",  OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, 0, 0, TFLAGS },
    { "h",           "set the height crop area expression",  OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, 0, 0, TFLAGS },
    { "x",           "set the x crop area expression",       OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "(in_w-out_w)/2"}, 0, 0, TFLAGS },
    { "y",           "set the y crop area expression",       OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "(in_h-out_h)/2"}, 0, 0, TFLAGS },
    { "keep_aspect", "keep aspect ratio",                    OFFSET(keep_aspect), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
    { "exact",       "do exact cropping",                    OFFSET(exact),  AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
    { NULL }
}

Definition at line 357 of file vf_crop.c.

avfilter_vf_crop_inputs

const AVFilterPad avfilter_vf_crop_inputs[]

static

Initial value:

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

Definition at line 371 of file vf_crop.c.

avfilter_vf_crop_outputs

const AVFilterPad avfilter_vf_crop_outputs[]

static

Initial value:

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

Definition at line 380 of file vf_crop.c.

ff_vf_crop

const FFFilter ff_vf_crop

Initial value:

= {
    .p.name          = "crop",
    .p.description   = NULL_IF_CONFIG_SMALL("Crop the input video."),
    .p.priv_class    = &crop_class,
    .priv_size       = sizeof(CropContext),
    .uninit          = uninit,
    FILTER_INPUTS(avfilter_vf_crop_inputs),
    FILTER_OUTPUTS(avfilter_vf_crop_outputs),
    FILTER_QUERY_FUNC2(query_formats),
    .process_command = process_command,
}

Definition at line 388 of file vf_crop.c.