libavfilter/vf_scale.c File Reference

scale video filter More...

#include "avfilter.h"
#include "libavutil/avstring.h"
#include "libavutil/eval.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avassert.h"
#include "libswscale/swscale.h"

Go to the source code of this file.

Data Structures
struct	ScaleContext
Enumerations
enum	var_name {   VAR_B1, VAR_B2, VAR_S1, VAR_S2,   VAR_T1, VAR_T2, VAR_NB, VAR_N,   VAR_T, VAR_S, VAR_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_MAIN_W, VAR_w, VAR_W,   VAR_MAIN_H, VAR_h, VAR_H, VAR_TW,   VAR_TEXT_W, VAR_TH, VAR_TEXT_H, VAR_MAX_GLYPH_W,   VAR_MAX_GLYPH_H, VAR_MAX_GLYPH_A, VAR_ASCENT, VAR_MAX_GLYPH_D,   VAR_DESCENT, VAR_LINE_H, VAR_LH, VAR_SAR,   VAR_DAR, VAR_HSUB, VAR_VSUB, VAR_X,   VAR_Y, VAR_N, VAR_T, VAR_VARS_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_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_A, VAR_SAR, VAR_DAR,   VAR_HSUB, VAR_VSUB, 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_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_N, VAR_SELECTED_N, VAR_PREV_SELECTED_N, VAR_KEY,   VAR_POS, VAR_VARS_NB, VAR_INTERLACED, VAR_N,   VAR_POS, VAR_PREV_INPTS, VAR_PREV_OUTPTS, VAR_PTS,   VAR_STARTPTS, VAR_TB, VAR_VARS_NB, VAR_AVTB,   VAR_INTB, VAR_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 }
Functions
static av_cold int	init (AVFilterContext *ctx, const char *args, void *opaque)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static int	config_props (AVFilterLink *outlink)
static void	start_frame (AVFilterLink *link, AVFilterBufferRef *picref)
static int	scale_slice (AVFilterLink *link, struct SwsContext *sws, int y, int h, int mul, int field)
static void	draw_slice (AVFilterLink *link, int y, int h, int slice_dir)
Variables
static const char *const	var_names []
AVFilter	avfilter_vf_scale

---

Detailed Description

scale video filter

Definition in file vf_scale.c.

---

Enumeration Type Documentation

enum var_name

Enumerator:

VAR_B1
VAR_B2
VAR_S1
VAR_S2
VAR_T1
VAR_T2
VAR_NB
VAR_N
VAR_T
VAR_S
VAR_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_MAIN_W
VAR_w
VAR_W
VAR_MAIN_H
VAR_h
VAR_H
VAR_TW
VAR_TEXT_W
VAR_TH
VAR_TEXT_H
VAR_MAX_GLYPH_W
VAR_MAX_GLYPH_H
VAR_MAX_GLYPH_A
VAR_ASCENT
VAR_MAX_GLYPH_D
VAR_DESCENT
VAR_LINE_H
VAR_LH
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_X
VAR_Y
VAR_N
VAR_T
VAR_VARS_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_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_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
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_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_N
VAR_SELECTED_N
VAR_PREV_SELECTED_N
VAR_KEY
VAR_POS
VAR_VARS_NB
VAR_INTERLACED
VAR_N
VAR_POS
VAR_PREV_INPTS
VAR_PREV_OUTPTS
VAR_PTS
VAR_STARTPTS
VAR_TB
VAR_VARS_NB
VAR_AVTB
VAR_INTB
VAR_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 47 of file vf_scale.c.

---

Function Documentation

static int config_props

(

AVFilterLink *

outlink

)

[static]

Definition at line 142 of file vf_scale.c.

static void draw_slice	(	AVFilterLink *	link,
		int	y,
		int	h,
		int	slice_dir
	)			[static]

Definition at line 304 of file vf_scale.c.

static av_cold int init	(	AVFilterContext *	ctx,
		const char *	args,
		void *	opaque
	)			[static]

Definition at line 81 of file vf_scale.c.

static int query_formats

(

AVFilterContext *

ctx

)

[static]

Definition at line 112 of file vf_scale.c.

static int scale_slice	(	AVFilterLink *	link,
		struct SwsContext *	sws,
		int	y,
		int	h,
		int	mul,
		int	field
	)			[static]

Definition at line 278 of file vf_scale.c.

Referenced by draw_slice().

static void start_frame	(	AVFilterLink *	link,
		AVFilterBufferRef *	picref
	)			[static]

Definition at line 253 of file vf_scale.c.

static av_cold void uninit

(

AVFilterContext *

ctx

)

[static]

Definition at line 103 of file vf_scale.c.

---

Variable Documentation

AVFilter avfilter_vf_scale

Initial value:

 {
    .name      = "scale",
    .description = NULL_IF_CONFIG_SMALL("Scale the input video to width:height size and/or convert the image format."),

    .init      = init,
    .uninit    = uninit,

    .query_formats = query_formats,

    .priv_size = sizeof(ScaleContext),

    .inputs    = (const AVFilterPad[]) {{ .name       = "default",
                                    .type             = AVMEDIA_TYPE_VIDEO,
                                    .start_frame      = start_frame,
                                    .draw_slice       = draw_slice,
                                    .min_perms        = AV_PERM_READ, },
                                  { .name = NULL}},
    .outputs   = (const AVFilterPad[]) {{ .name       = "default",
                                    .type             = AVMEDIA_TYPE_VIDEO,
                                    .config_props     = config_props, },
                                  { .name = NULL}},
}

Definition at line 327 of file vf_scale.c.

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",
    NULL
}

Definition at line 34 of file vf_scale.c.