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 "video.h"
#include "libavutil/avstring.h"
#include "libavutil/eval.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	var_name {   VAR_CH, VAR_N, VAR_NB_IN_CHANNELS, VAR_NB_OUT_CHANNELS,   VAR_T, VAR_S, VAR_VARS_NB, VAR_VALUE1,   VAR_VALUE2, VAR_VARS_NB, VAR_TB, VAR_PTS,   VAR_START_PTS, VAR_PREV_PTS, VAR_PREV_SELECTED_PTS, VAR_T,   VAR_START_T, VAR_PREV_T, VAR_PREV_SELECTED_T, VAR_PICT_TYPE,   VAR_I, VAR_P, VAR_B, VAR_S,   VAR_SI, VAR_SP, VAR_BI, VAR_PICT_TYPE_I,   VAR_PICT_TYPE_P, VAR_PICT_TYPE_B, VAR_PICT_TYPE_S, VAR_PICT_TYPE_SI,   VAR_PICT_TYPE_SP, VAR_PICT_TYPE_BI, VAR_INTERLACE_TYPE, VAR_INTERLACE_TYPE_P,   VAR_INTERLACE_TYPE_T, VAR_INTERLACE_TYPE_B, VAR_CONSUMED_SAMPLES_N, VAR_SAMPLES_N,   VAR_SAMPLE_RATE, VAR_N, VAR_SELECTED_N, VAR_PREV_SELECTED_N,   VAR_KEY, VAR_POS, VAR_SCENE, VAR_CONCATDEC_SELECT,   VAR_VARS_NB, VAR_FRAME_RATE, VAR_INTERLACED, VAR_N,   VAR_NB_CONSUMED_SAMPLES, VAR_NB_SAMPLES, VAR_POS, VAR_PREV_INPTS,   VAR_PREV_INT, VAR_PREV_OUTPTS, VAR_PREV_OUTT, VAR_PTS,   VAR_SAMPLE_RATE, VAR_STARTPTS, VAR_STARTT, VAR_T,   VAR_TB, VAR_RTCTIME, VAR_RTCSTART, VAR_S,   VAR_SR, VAR_VARS_NB, VAR_AVTB, VAR_INTB,   VAR_SR, VAR_VARS_NB, VAR_W, VAR_H,   VAR_A, VAR_DAR, VAR_SAR, VAR_HSUB,   VAR_VSUB, VARS_NB, VAR_W, VAR_H,   VAR_CW, VAR_CH, VAR_HSUB, VAR_VSUB,   VARS_NB, 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_POS, VAR_T, VAR_VARS_NB,   VAR_DAR, VAR_HSUB, VAR_VSUB, VAR_IN_H,   VAR_IH, VAR_IN_W, VAR_IW, VAR_SAR,   VAR_X, VAR_Y, VAR_H, VAR_W,   VAR_T, VAR_MAX, VARS_NB, VAR_DAR,   VAR_HSUB, VAR_VSUB, VAR_LINE_H, VAR_LH,   VAR_MAIN_H, VAR_h, VAR_H, VAR_MAIN_W,   VAR_w, VAR_W, VAR_MAX_GLYPH_A, VAR_ASCENT,   VAR_MAX_GLYPH_D, VAR_DESCENT, VAR_MAX_GLYPH_H, VAR_MAX_GLYPH_W,   VAR_N, VAR_SAR, VAR_T, VAR_TEXT_H,   VAR_TH, VAR_TEXT_W, VAR_TW, VAR_X,   VAR_Y, VAR_PICT_TYPE, VAR_VARS_NB, VAR_N,   VAR_POS, VAR_R, VAR_T, VAR_NB,   VAR_N, VAR_PTS, VAR_R, VAR_T,   VAR_TB, VAR_NB, VAR_W, VAR_H,   VAR_VAL, VAR_MAXVAL, VAR_MINVAL, VAR_NEGVAL,   VAR_CLIPVAL, VAR_VARS_NB, VAR_MAIN_W, VAR_MW,   VAR_MAIN_H, VAR_MH, VAR_OVERLAY_W, VAR_OW,   VAR_OVERLAY_H, VAR_OH, VAR_HSUB, VAR_VSUB,   VAR_X, VAR_Y, VAR_N, VAR_POS,   VAR_T, VAR_VARS_NB, VAR_IN_W, VAR_IW,   VAR_IN_H, VAR_IH, VAR_OUT_W, VAR_OW,   VAR_OUT_H, VAR_OH, VAR_X, VAR_Y,   VAR_A, VAR_SAR, VAR_DAR, VAR_HSUB,   VAR_VSUB, VARS_NB, VAR_IN_W, VAR_IW,   VAR_IN_H, VAR_IH, VAR_OUT_W, VAR_OW,   VAR_OUT_H, VAR_OH, VAR_HSUB, VAR_VSUB,   VAR_N, VAR_T, VAR_VARS_NB, 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, VARS_NB, VAR_W,   VAR_H, VAR_N, VAR_PTS, VAR_R,   VAR_T, VAR_TB, VAR_NB, VAR_IN_W,   VAR_IW, VAR_IN_H, VAR_IH, VAR_OUT_W,   VAR_OW, VAR_OUT_H, VAR_OH, VAR_IN,   VAR_ON, VAR_DURATION, VAR_PDURATION, VAR_TIME,   VAR_FRAME, VAR_ZOOM, VAR_PZOOM, VAR_X,   VAR_PX, VAR_Y, VAR_PY, VAR_A,   VAR_SAR, VAR_DAR, VAR_HSUB, VAR_VSUB,   VARS_NB, 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,   VARS_NB, VAR_X, VAR_Y, VAR_W,   VAR_H, VAR_TIME, VAR_SPEED, VAR_TEMPO,   VAR_ORDER, VAR_PATTERN, VAR_ROW, VAR_VARS_NB }
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 }

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
static const char *const	var_names []
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

#define OFFSET

(

x

)

offsetof(ScaleContext, x)

Definition at line 653 of file vf_scale.c.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 654 of file vf_scale.c.

Enumeration Type Documentation

enum var_name

Enumerator
VAR_CH
VAR_N
VAR_NB_IN_CHANNELS
VAR_NB_OUT_CHANNELS
VAR_T
VAR_S
VAR_VARS_NB
VAR_VALUE1
VAR_VALUE2
VAR_VARS_NB
VAR_TB
VAR_PTS
VAR_START_PTS
VAR_PREV_PTS
VAR_PREV_SELECTED_PTS
VAR_T
VAR_START_T
VAR_PREV_T
VAR_PREV_SELECTED_T
VAR_PICT_TYPE
VAR_I
VAR_P
VAR_B
VAR_S
VAR_SI
VAR_SP
VAR_BI
VAR_PICT_TYPE_I
VAR_PICT_TYPE_P
VAR_PICT_TYPE_B
VAR_PICT_TYPE_S
VAR_PICT_TYPE_SI
VAR_PICT_TYPE_SP
VAR_PICT_TYPE_BI
VAR_INTERLACE_TYPE
VAR_INTERLACE_TYPE_P
VAR_INTERLACE_TYPE_T
VAR_INTERLACE_TYPE_B
VAR_CONSUMED_SAMPLES_N
VAR_SAMPLES_N
VAR_SAMPLE_RATE
VAR_N
VAR_SELECTED_N
VAR_PREV_SELECTED_N
VAR_KEY
VAR_POS
VAR_SCENE
VAR_CONCATDEC_SELECT
VAR_VARS_NB
VAR_FRAME_RATE
VAR_INTERLACED
VAR_N
VAR_NB_CONSUMED_SAMPLES
VAR_NB_SAMPLES
VAR_POS
VAR_PREV_INPTS
VAR_PREV_INT
VAR_PREV_OUTPTS
VAR_PREV_OUTT
VAR_PTS
VAR_SAMPLE_RATE
VAR_STARTPTS
VAR_STARTT
VAR_T
VAR_TB
VAR_RTCTIME
VAR_RTCSTART
VAR_S
VAR_SR
VAR_VARS_NB
VAR_AVTB
VAR_INTB
VAR_SR
VAR_VARS_NB
VAR_W
VAR_H
VAR_A
VAR_DAR
VAR_SAR
VAR_HSUB
VAR_VSUB
VARS_NB
VAR_W
VAR_H
VAR_CW
VAR_CH
VAR_HSUB
VAR_VSUB
VARS_NB
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_POS
VAR_T
VAR_VARS_NB
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_IN_H
VAR_IH
VAR_IN_W
VAR_IW
VAR_SAR
VAR_X
VAR_Y
VAR_H
VAR_W
VAR_T
VAR_MAX
VARS_NB
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_LINE_H
VAR_LH
VAR_MAIN_H
VAR_h
VAR_H
VAR_MAIN_W
VAR_w
VAR_W
VAR_MAX_GLYPH_A
VAR_ASCENT
VAR_MAX_GLYPH_D
VAR_DESCENT
VAR_MAX_GLYPH_H
VAR_MAX_GLYPH_W
VAR_N
VAR_SAR
VAR_T
VAR_TEXT_H
VAR_TH
VAR_TEXT_W
VAR_TW
VAR_X
VAR_Y
VAR_PICT_TYPE
VAR_VARS_NB
VAR_N
VAR_POS
VAR_R
VAR_T
VAR_NB
VAR_N
VAR_PTS
VAR_R
VAR_T
VAR_TB
VAR_NB
VAR_W
VAR_H
VAR_VAL
VAR_MAXVAL
VAR_MINVAL
VAR_NEGVAL
VAR_CLIPVAL
VAR_VARS_NB
VAR_MAIN_W
VAR_MW
VAR_MAIN_H
VAR_MH
VAR_OVERLAY_W
VAR_OW
VAR_OVERLAY_H
VAR_OH
VAR_HSUB
VAR_VSUB
VAR_X
VAR_Y
VAR_N
VAR_POS
VAR_T
VAR_VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_X
VAR_Y
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_HSUB
VAR_VSUB
VAR_N
VAR_T
VAR_VARS_NB
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
VARS_NB
VAR_W
VAR_H
VAR_N
VAR_PTS
VAR_R
VAR_T
VAR_TB
VAR_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_IN
VAR_ON
VAR_DURATION
VAR_PDURATION
VAR_TIME
VAR_FRAME
VAR_ZOOM
VAR_PZOOM
VAR_X
VAR_PX
VAR_Y
VAR_PY
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VARS_NB
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
VARS_NB
VAR_X
VAR_Y
VAR_W
VAR_H
VAR_TIME
VAR_SPEED
VAR_TEMPO
VAR_ORDER
VAR_PATTERN
VAR_ROW
VAR_VARS_NB

Definition at line 59 of file vf_scale.c.

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

Definition at line 74 of file vf_scale.c.

Function Documentation

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

static

Definition at line 129 of file vf_scale.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 179 of file vf_scale.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 189 of file vf_scale.c.

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

static

Definition at line 227 of file vf_scale.c.

Referenced by filter_frame().

static int config_props ( AVFilterLink *  outlink )

static

Definition at line 249 of file vf_scale.c.

Referenced by filter_frame(), and process_command().

static int config_props_ref ( AVFilterLink *  outlink )

static

Definition at line 447 of file vf_scale.c.

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 459 of file vf_scale.c.

static int request_frame_ref ( AVFilterLink *  outlink )

static

Definition at line 464 of file vf_scale.c.

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 469 of file vf_scale.c.

Referenced by filter_frame().

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

static

Definition at line 493 of file vf_scale.c.

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

static

Definition at line 617 of file vf_scale.c.

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

static

Definition at line 624 of file vf_scale.c.

static const AVClass* child_class_next ( const AVClass *  prev )

static

Definition at line 648 of file vf_scale.c.

Variable Documentation

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",
    "ohsub",
    "ovsub",
    NULL
}

Definition at line 44 of file vf_scale.c.

Referenced by config_props().

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 127 of file vf_scale.c.

const AVOption scale_options[]

static

Definition at line 656 of file vf_scale.c.

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 692 of file vf_scale.c.

const AVFilterPad avfilter_vf_scale_inputs[]

static

Initial value:

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

Definition at line 701 of file vf_scale.c.

const AVFilterPad avfilter_vf_scale_outputs[]

static

Initial value:

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

Definition at line 710 of file vf_scale.c.

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 719 of file vf_scale.c.

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 732 of file vf_scale.c.

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 741 of file vf_scale.c.

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 755 of file vf_scale.c.