vf_scale.c File Reference

scale video filter More...

#include <stdio.h>
#include <string.h>
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "scale.h"
#include "video.h"
#include "libavutil/avstring.h"
#include "libavutil/internal.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/avassert.h"
#include "libswscale/swscale.h"

Go to the source code of this file.

Data Structures
struct	ScaleContext

Macros
#define	OFFSET(x)   offsetof(ScaleContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Enumerations
enum	EvalMode {   EVAL_MODE_ONCE, EVAL_MODE_FRAME, EVAL_MODE_NB, EVAL_MODE_INIT,   EVAL_MODE_FRAME, EVAL_MODE_NB, EVAL_MODE_INIT, EVAL_MODE_FRAME,   EVAL_MODE_NB, EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB,   EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB, EVAL_MODE_INIT,   EVAL_MODE_FRAME, EVAL_MODE_NB, EVAL_MODE_INIT, EVAL_MODE_FRAME,   EVAL_MODE_NB }

Functions
static av_cold int	init_dict (AVFilterContext *ctx, AVDictionary **opts)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static const int *	parse_yuv_type (const char *s, enum AVColorSpace colorspace)
static int	config_props (AVFilterLink *outlink)
static int	config_props_ref (AVFilterLink *outlink)
static int	request_frame (AVFilterLink *outlink)
static int	request_frame_ref (AVFilterLink *outlink)
static int	scale_slice (AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field)
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 const AVClass *	child_class_next (const AVClass *prev)

Variables
AVFilter	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 []
AVFilter	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

OFFSET

#define OFFSET

(

x

)

offsetof(ScaleContext, x)

Definition at line 563 of file vf_scale.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 564 of file vf_scale.c.

Enumeration Type Documentation

EvalMode

enum EvalMode

Enumerator
EVAL_MODE_ONCE
EVAL_MODE_FRAME
EVAL_MODE_NB
EVAL_MODE_INIT
EVAL_MODE_FRAME
EVAL_MODE_NB
EVAL_MODE_INIT
EVAL_MODE_FRAME
EVAL_MODE_NB
EVAL_MODE_INIT
EVAL_MODE_FRAME
EVAL_MODE_NB
EVAL_MODE_INIT
EVAL_MODE_FRAME
EVAL_MODE_NB
EVAL_MODE_INIT
EVAL_MODE_FRAME
EVAL_MODE_NB
EVAL_MODE_INIT
EVAL_MODE_FRAME
EVAL_MODE_NB

Definition at line 44 of file vf_scale.c.

Function Documentation

init_dict()

static av_cold int init_dict ( AVFilterContext *  ctx, AVDictionary **  opts  )

static

Definition at line 98 of file vf_scale.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 148 of file vf_scale.c.

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 158 of file vf_scale.c.

parse_yuv_type()

static const int* parse_yuv_type ( const char *  s, enum AVColorSpace  colorspace  )

static

Definition at line 196 of file vf_scale.c.

Referenced by filter_frame().

config_props()

static int config_props ( AVFilterLink *  outlink )

static

Definition at line 220 of file vf_scale.c.

Referenced by filter_frame(), and process_command().

config_props_ref()

static int config_props_ref ( AVFilterLink *  outlink )

static

Definition at line 356 of file vf_scale.c.

request_frame()

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 369 of file vf_scale.c.

request_frame_ref()

static int request_frame_ref ( AVFilterLink *  outlink )

static

Definition at line 374 of file vf_scale.c.

scale_slice()

static int scale_slice ( AVFilterLink *  link, AVFrame *  out_buf, AVFrame *  cur_pic, struct SwsContext *  sws, int  y, int  h, int  mul, int  field  )

static

Definition at line 379 of file vf_scale.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 403 of file vf_scale.c.

filter_frame_ref()

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

static

Definition at line 527 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 534 of file vf_scale.c.

child_class_next()

static const AVClass* child_class_next ( const AVClass *  prev )

static

Definition at line 558 of file vf_scale.c.

Variable Documentation

ff_vf_scale2ref

AVFilter ff_vf_scale2ref

Initial value:

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

Definition at line 96 of file vf_scale.c.

scale_options

const AVOption scale_options[]

static

Definition at line 566 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_next = child_class_next,
}

Definition at line 604 of file vf_scale.c.

avfilter_vf_scale_inputs

const AVFilterPad avfilter_vf_scale_inputs[]

static

Initial value:

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

Definition at line 613 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,
    },
    { NULL }
}

Definition at line 622 of file vf_scale.c.

ff_vf_scale

AVFilter ff_vf_scale

Initial value:

= {
    .name            = "scale",
    .description     = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
    .init_dict       = init_dict,
    .uninit          = uninit,
    .query_formats   = query_formats,
    .priv_size       = sizeof(ScaleContext),
    .priv_class      = &scale_class,
    .inputs          = avfilter_vf_scale_inputs,
    .outputs         = avfilter_vf_scale_outputs,
    .process_command = process_command,
}

Definition at line 631 of file vf_scale.c.

scale2ref_class

const AVClass scale2ref_class

static

Initial value:

= {
    .class_name       = "scale2ref",
    .item_name        = av_default_item_name,
    .option           = scale_options,
    .version          = LIBAVUTIL_VERSION_INT,
    .category         = AV_CLASS_CATEGORY_FILTER,
    .child_class_next = child_class_next,
}

Definition at line 644 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,
    },
    { NULL }
}

Definition at line 653 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,
    },
    { NULL }
}

Definition at line 667 of file vf_scale.c.