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"

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_B1, VAR_B2, VAR_S1, VAR_S2, VAR_T1, VAR_T2, VAR_NB, VAR_N, VAR_T, VAR_S, 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_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_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_VARS_NB, VAR_AVTB, VAR_INTB, VAR_SR, 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_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_VARS_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_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_X, VAR_Y, VAR_W, VAR_H, VAR_TIME, VAR_SPEED, VAR_TEMPO, VAR_ORDER, VAR_PATTERN, VAR_ROW, VAR_VARS_NB }

Functions
	AVFILTER_DEFINE_CLASS (scale)

static av_cold int	init (AVFilterContext ctx, const char args)

static av_cold void	uninit (AVFilterContext *ctx)

static int	query_formats (AVFilterContext *ctx)

static int	config_props (AVFilterLink *outlink)

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

static int	filter_frame (AVFilterLink link, AVFilterBufferRef in)

Variables
static const char *const	var_names []

static const AVOption	scale_options []

static const AVFilterPad	avfilter_vf_scale_inputs []

static const AVFilterPad	avfilter_vf_scale_outputs []

AVFilter	avfilter_vf_scale

Detailed Description

scale video filter

Definition in file vf_scale.c.

Macro Definition Documentation

#define OFFSET ( x ) offsetof(ScaleContext, x)

Definition at line 95 of file vf_scale.c.

#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 96 of 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_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_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_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_VARS_NB
VAR_AVTB
VAR_INTB
VAR_SR
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_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_VARS_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_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_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 57 of file vf_scale.c.

Function Documentation

AVFILTER_DEFINE_CLASS ( scale )

static av_cold int init	(	AVFilterContext *	ctx,
		const char *	args
	)

static

Definition at line 112 of file vf_scale.c.

static av_cold void uninit ( AVFilterContext * ctx )

static

Definition at line 172 of file vf_scale.c.

static int query_formats ( AVFilterContext * ctx )

static

Definition at line 182 of file vf_scale.c.

static int config_props ( AVFilterLink * outlink )

static

Definition at line 212 of file vf_scale.c.

Referenced by filter_frame().

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

static

Definition at line 332 of file vf_scale.c.

Referenced by filter_frame().

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

static

Definition at line 356 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",
    NULL
}

Definition at line 44 of file vf_scale.c.

Referenced by config_props().

const AVOption scale_options[]

static

Initial value:

= {
    { "w",      "set width expression",    OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { "width",  "set width expression",    OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { "h",      "set height expression",   OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { "height", "set height expression",   OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { "flags",  "set libswscale flags",    OFFSET(flags_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, INT_MAX, FLAGS },
    { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_INT, {.i64 = 0 }, -1, 1, FLAGS },
    { "size",   "set video size",          OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
    { "s",      "set video size",          OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
    { NULL },
}

Definition at line 98 of file vf_scale.c.

const AVFilterPad avfilter_vf_scale_inputs[]

static

Initial value:

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

Definition at line 416 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 426 of file vf_scale.c.

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    = avfilter_vf_scale_inputs,
    .outputs   = avfilter_vf_scale_outputs,
    .priv_class = &scale_class,
}

Definition at line 435 of file vf_scale.c.

Data Structures

Macros

Enumerations

Functions

Variables

Detailed Description

Macro Definition Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation