vf_scale.c File Reference

scale video filter More...

#include <float.h>
#include <stdio.h>
#include <string.h>
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "framesync.h"
#include "libavutil/pixfmt.h"
#include "scale_eval.h"
#include "video.h"
#include "libavutil/eval.h"
#include "libavutil/imgutils_internal.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libswscale/swscale.h"

Go to the source code of this file.

Data Structures
struct	ScaleContext

Macros
#define	IS_SCALE2REF(ctx)
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	TFLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_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_OHSUB , VAR_OVSUB , VAR_N ,   VAR_T , VAR_REF_W , VAR_RW , VAR_REF_H ,   VAR_RH , VAR_REF_A , VAR_REF_SAR , VAR_REF_DAR ,   VAR_RDAR , VAR_REF_HSUB , VAR_REF_VSUB , VAR_REF_N ,   VAR_REF_T , VAR_REF_POS , VAR_S2R_MAIN_W , VAR_S2R_MAIN_H ,   VAR_S2R_MAIN_A , VAR_S2R_MAIN_SAR , VAR_S2R_MAIN_DAR , VAR_S2R_MDAR ,   VAR_S2R_MAIN_HSUB , VAR_S2R_MAIN_VSUB , VAR_S2R_MAIN_N , VAR_S2R_MAIN_T ,   VAR_S2R_MAIN_POS , VARS_NB }
enum	EvalMode { EVAL_MODE_INIT , EVAL_MODE_FRAME , EVAL_MODE_NB }

Functions
static int	config_props (AVFilterLink *outlink)
static int	check_exprs (AVFilterContext *ctx)
static int	scale_parse_expr (AVFilterContext *ctx, char *str_expr, AVExpr **pexpr_ptr, const char *var, const char *args)
static av_cold int	preinit (AVFilterContext *ctx)
static int	do_scale (FFFrameSync *fs)
static av_cold int	init (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
static int	scale_eval_dimensions (AVFilterContext *ctx)
static int	config_props_ref (AVFilterLink *outlink)
static int	request_frame (AVFilterLink *outlink)
static int	request_frame_ref (AVFilterLink *outlink)
static int	scale_frame (AVFilterLink *link, AVFrame **frame_in, AVFrame **frame_out)
static int	filter_frame (AVFilterLink *link, AVFrame *in)
static int	filter_frame_ref (AVFilterLink *link, AVFrame *in)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
static int	activate (AVFilterContext *ctx)
static const AVClass *	child_class_iterate (void **iter)
static void *	child_next (void *obj, void *prev)
static const AVClass *	scale2ref_child_class_iterate (void **iter)
static void *	scale2ref_child_next (void *obj, void *prev)

Variables
static const char *const	var_names []
const FFFilter	ff_vf_scale2ref
static const AVOption	scale_options []
static const AVClass	scale_class
static const AVFilterPad	avfilter_vf_scale_inputs []
static const AVFilterPad	avfilter_vf_scale_outputs []
const FFFilter	ff_vf_scale
static const AVClass	scale2ref_class
static const AVFilterPad	avfilter_vf_scale2ref_inputs []
static const AVFilterPad	avfilter_vf_scale2ref_outputs []

Detailed Description

scale video filter

Definition in file vf_scale.c.

Macro Definition Documentation

IS_SCALE2REF

#define IS_SCALE2REF

(

ctx

)

Value:

((ctx)->filter == &ff_vf_scale2ref.p)

Definition at line 180 of file vf_scale.c.

Referenced by check_exprs(), config_props(), init(), nppscale_scale(), scale_eval_dimensions(), and scale_frame().

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(ScaleContext, x)

Definition at line 1065 of file vf_scale.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 1066 of file vf_scale.c.

TFLAGS

#define TFLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 1067 of file vf_scale.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_OHSUB
VAR_OVSUB
VAR_N
VAR_T
VAR_REF_W
VAR_RW
VAR_REF_H
VAR_RH
VAR_REF_A
VAR_REF_SAR
VAR_REF_DAR
VAR_RDAR
VAR_REF_HSUB
VAR_REF_VSUB
VAR_REF_N
VAR_REF_T
VAR_REF_POS
VAR_S2R_MAIN_W
VAR_S2R_MAIN_H
VAR_S2R_MAIN_A
VAR_S2R_MAIN_SAR
VAR_S2R_MAIN_DAR
VAR_S2R_MDAR
VAR_S2R_MAIN_HSUB
VAR_S2R_MAIN_VSUB
VAR_S2R_MAIN_N
VAR_S2R_MAIN_T
VAR_S2R_MAIN_POS
VARS_NB

Definition at line 84 of file vf_scale.c.

EvalMode

enum EvalMode

Enumerator
EVAL_MODE_INIT
EVAL_MODE_FRAME
EVAL_MODE_NB

Definition at line 121 of file vf_scale.c.

Function Documentation

config_props()

static int config_props ( AVFilterLink * outlink )

static

Definition at line 621 of file vf_scale.c.

Referenced by do_scale(), scale_frame(), and scale_parse_expr().

check_exprs()

static int check_exprs ( AVFilterContext * ctx )

static

Definition at line 184 of file vf_scale.c.

Referenced by scale_parse_expr().

scale_parse_expr()

static int scale_parse_expr ( AVFilterContext * ctx, char * str_expr, AVExpr ** pexpr_ptr, const char * var, const char * args )

static

Definition at line 257 of file vf_scale.c.

Referenced by init(), process_command(), and scale_frame().

preinit()

static av_cold int preinit ( AVFilterContext * ctx )

static

Definition at line 310 of file vf_scale.c.

do_scale()

static int do_scale ( FFFrameSync * fs )

static

Definition at line 898 of file vf_scale.c.

Referenced by config_props().

init()

static av_cold int init ( AVFilterContext * ctx )

static

Definition at line 328 of file vf_scale.c.

uninit()

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 441 of file vf_scale.c.

query_formats()

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

static

Definition at line 451 of file vf_scale.c.

scale_eval_dimensions()

static int scale_eval_dimensions ( AVFilterContext * ctx )

static

Definition at line 532 of file vf_scale.c.

Referenced by config_props().

config_props_ref()

static int config_props_ref ( AVFilterLink * outlink )

static

Definition at line 716 of file vf_scale.c.

Referenced by filter_frame_ref().

request_frame()

static int request_frame ( AVFilterLink * outlink )

static

Definition at line 733 of file vf_scale.c.

request_frame_ref()

static int request_frame_ref ( AVFilterLink * outlink )

static

Definition at line 738 of file vf_scale.c.

scale_frame()

static int scale_frame ( AVFilterLink * link, AVFrame ** frame_in, AVFrame ** frame_out )

static

Definition at line 744 of file vf_scale.c.

Referenced by do_scale(), and filter_frame().

filter_frame()

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

static

Definition at line 961 of file vf_scale.c.

filter_frame_ref()

static int filter_frame_ref ( AVFilterLink * link, AVFrame * in )

static

Definition at line 975 of file vf_scale.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 1010 of file vf_scale.c.

activate()

static int activate ( AVFilterContext * ctx )

static

Definition at line 1035 of file vf_scale.c.

child_class_iterate()

static const AVClass * child_class_iterate ( void ** iter )

static

Definition at line 1041 of file vf_scale.c.

child_next()

static void * child_next ( void * obj, void * prev )

static

Definition at line 1055 of file vf_scale.c.

scale2ref_child_class_iterate()

static const AVClass * scale2ref_child_class_iterate ( void ** iter )

static

Definition at line 1205 of file vf_scale.c.

scale2ref_child_next()

static void * scale2ref_child_next ( void * obj, void * prev )

static

Definition at line 1212 of file vf_scale.c.

Variable Documentation

var_names

const char* const var_names[]

static

Definition at line 46 of file vf_scale.c.

ff_vf_scale2ref

const FFFilter ff_vf_scale2ref

Initial value:

= {
    .p.name          = "scale2ref",
    .p.description   = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
    .p.priv_class    = &scale2ref_class,
    .preinit         = preinit,
    .init            = init,
    .uninit          = uninit,
    .priv_size       = sizeof(ScaleContext),
    FILTER_INPUTS(avfilter_vf_scale2ref_inputs),
    FILTER_OUTPUTS(avfilter_vf_scale2ref_outputs),
    FILTER_QUERY_FUNC2(query_formats),
    .process_command = process_command,
}

Definition at line 179 of file vf_scale.c.

scale_options

const AVOption scale_options[]

static

Definition at line 1069 of file vf_scale.c.

scale_class

const AVClass scale_class

static

Initial value:

= {
    .class_name       = "scale",
    .item_name        = av_default_item_name,
    .option           = scale_options,
    .version          = LIBAVUTIL_VERSION_INT,
    .category         = AV_CLASS_CATEGORY_FILTER,
    .child_class_iterate = child_class_iterate,
    .child_next          = child_next,
}

Definition at line 1164 of file vf_scale.c.

avfilter_vf_scale_inputs

const AVFilterPad avfilter_vf_scale_inputs[]

static

Initial value:

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

Definition at line 1174 of file vf_scale.c.

avfilter_vf_scale_outputs

const AVFilterPad avfilter_vf_scale_outputs[]

static

Initial value:

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

Definition at line 1181 of file vf_scale.c.

ff_vf_scale

const FFFilter ff_vf_scale

Initial value:

= {
    .p.name          = "scale",
    .p.description   = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
    .p.priv_class    = &scale_class,
    .p.flags         = AVFILTER_FLAG_DYNAMIC_INPUTS,
    .preinit         = preinit,
    .init            = init,
    .uninit          = uninit,
    .priv_size       = sizeof(ScaleContext),
    FILTER_INPUTS(avfilter_vf_scale_inputs),
    FILTER_OUTPUTS(avfilter_vf_scale_outputs),
    FILTER_QUERY_FUNC2(query_formats),
    .activate        = activate,
    .process_command = process_command,
}

Definition at line 1189 of file vf_scale.c.

scale2ref_class

const AVClass scale2ref_class

static

Initial value:

= {
    .class_name       = "scale(2ref)",
    .item_name        = av_default_item_name,
    .option           = scale_options,
    .version          = LIBAVUTIL_VERSION_INT,
    .category         = AV_CLASS_CATEGORY_FILTER,
    .child_class_iterate = scale2ref_child_class_iterate,
    .child_next          = scale2ref_child_next,
}

Definition at line 1220 of file vf_scale.c.

avfilter_vf_scale2ref_inputs

const AVFilterPad avfilter_vf_scale2ref_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
    },
    {
        .name         = "ref",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame_ref,
    },
}

Definition at line 1230 of file vf_scale.c.

avfilter_vf_scale2ref_outputs

const AVFilterPad avfilter_vf_scale2ref_outputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_props,
        .request_frame= request_frame,
    },
    {
        .name         = "ref",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_props_ref,
        .request_frame= request_frame_ref,
    },
}

Definition at line 1243 of file vf_scale.c.