vf_scroll.c File Reference

#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	ScrollContext
struct	ThreadData
	Used for passing data between threads. More...

Macros
#define	OFFSET(x)   offsetof(ScrollContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	VFT   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Functions
static int	query_formats (AVFilterContext *ctx)
static int	scroll_slice (AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static void	scroll (AVFilterContext *ctx, AVFrame *in, AVFrame *out)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	config_input (AVFilterLink *inlink)
	AVFILTER_DEFINE_CLASS (scroll)

Variables
static const AVOption	scroll_options []
static const AVFilterPad	scroll_inputs []
static const AVFilterPad	scroll_outputs []
AVFilter	ff_vf_scroll

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(ScrollContext, x)

Definition at line 181 of file vf_scroll.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 182 of file vf_scroll.c.

VFT

#define VFT   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

Definition at line 183 of file vf_scroll.c.

Function Documentation

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 46 of file vf_scroll.c.

scroll_slice()

static int scroll_slice ( AVFilterContext *  ctx, void *  arg, int  jobnr, int  nb_jobs  )

static

Definition at line 80 of file vf_scroll.c.

Referenced by scroll().

scroll()

static void scroll ( AVFilterContext *  ctx, AVFrame *  in, AVFrame *  out  )

static

Definition at line 112 of file vf_scroll.c.

Referenced by filter_frame().

filter_frame()

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

static

Definition at line 142 of file vf_scroll.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 161 of file vf_scroll.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

scroll

)

Variable Documentation

scroll_options

const AVOption scroll_options[]

static

Initial value:

= {
    { "horizontal", "set the horizontal scrolling speed", OFFSET(h_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
    { "h",          "set the horizontal scrolling speed", OFFSET(h_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
    { "vertical",   "set the vertical scrolling speed",   OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
    { "v",          "set the vertical scrolling speed",   OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
    { "hpos",       "set initial horizontal position",    OFFSET(h_ipos),  AV_OPT_TYPE_FLOAT, {.dbl=0.},   0, 1., FLAGS },
    { "vpos",       "set initial vertical position",      OFFSET(v_ipos),  AV_OPT_TYPE_FLOAT, {.dbl=0.},   0, 1., FLAGS },
    { NULL }
}

Definition at line 185 of file vf_scroll.c.

scroll_inputs

const AVFilterPad scroll_inputs[]

static

Initial value:

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

Definition at line 197 of file vf_scroll.c.

scroll_outputs

const AVFilterPad scroll_outputs[]

static

Initial value:

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

Definition at line 207 of file vf_scroll.c.

ff_vf_scroll

AVFilter ff_vf_scroll

Initial value:

= {
    .name          = "scroll",
    .description   = NULL_IF_CONFIG_SMALL("Scroll input video."),
    .priv_size     = sizeof(ScrollContext),
    .priv_class    = &scroll_class,
    .query_formats = query_formats,
    .inputs        = scroll_inputs,
    .outputs       = scroll_outputs,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
    .process_command = ff_filter_process_command,
}

Definition at line 215 of file vf_scroll.c.