libavfilter/vf_fps.c File Reference

a filter enforcing given constant framerate More...

#include "libavutil/common.h"
#include "libavutil/fifo.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	FPSContext
Defines
#define	OFFSET(x)   offsetof(FPSContext, x)
#define	V   AV_OPT_FLAG_VIDEO_PARAM
#define	F   AV_OPT_FLAG_FILTERING_PARAM
Functions
	AVFILTER_DEFINE_CLASS (fps)
static av_cold int	init (AVFilterContext *ctx, const char *args)
static void	flush_fifo (AVFifoBuffer *fifo)
static av_cold void	uninit (AVFilterContext *ctx)
static int	config_props (AVFilterLink *link)
static int	request_frame (AVFilterLink *outlink)
static int	write_to_fifo (AVFifoBuffer *fifo, AVFilterBufferRef *buf)
static int	end_frame (AVFilterLink *inlink)
static int	null_start_frame (AVFilterLink *link, AVFilterBufferRef *buf)
static int	null_draw_slice (AVFilterLink *link, int y, int h, int slice_dir)
Variables
static const AVOption	fps_options []
AVFilter	avfilter_vf_fps

---

Detailed Description

a filter enforcing given constant framerate

Definition in file vf_fps.c.

---

Define Documentation

#define F   AV_OPT_FLAG_FILTERING_PARAM

Definition at line 59 of file vf_fps.c.

#define OFFSET

(

x

)

offsetof(FPSContext, x)

Definition at line 57 of file vf_fps.c.

#define V   AV_OPT_FLAG_VIDEO_PARAM

Definition at line 58 of file vf_fps.c.

---

Function Documentation

AVFILTER_DEFINE_CLASS

(

fps

)

static int config_props

(

AVFilterLink *

link

)

[static]

Definition at line 115 of file vf_fps.c.

static int end_frame

(

AVFilterLink *

inlink

)

[static]

Definition at line 175 of file vf_fps.c.

static void flush_fifo

(

AVFifoBuffer *

fifo

)

[static]

Definition at line 94 of file vf_fps.c.

Referenced by end_frame(), and uninit().

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

Definition at line 67 of file vf_fps.c.

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

Definition at line 277 of file vf_fps.c.

static int null_start_frame	(	AVFilterLink *	link,
		AVFilterBufferRef *	buf
	)			[static]

Definition at line 272 of file vf_fps.c.

static int request_frame

(

AVFilterLink *

outlink

)

[static]

Definition at line 128 of file vf_fps.c.

static av_cold void uninit

(

AVFilterContext *

ctx

)

[static]

Definition at line 103 of file vf_fps.c.

static int write_to_fifo	(	AVFifoBuffer *	fifo,
		AVFilterBufferRef *	buf
	)			[static]

Definition at line 161 of file vf_fps.c.

---

Variable Documentation

AVFilter avfilter_vf_fps

Initial value:

 {
    .name        = "fps",
    .description = NULL_IF_CONFIG_SMALL("Force constant framerate"),

    .init      = init,
    .uninit    = uninit,

    .priv_size = sizeof(FPSContext),

    .inputs    = (const AVFilterPad[]) {{ .name            = "default",
                                          .type            = AVMEDIA_TYPE_VIDEO,
                                          .min_perms       = AV_PERM_READ | AV_PERM_PRESERVE,
                                          .start_frame     = null_start_frame,
                                          .draw_slice      = null_draw_slice,
                                          .end_frame       = end_frame, },
                                        { .name = NULL}},
    .outputs   = (const AVFilterPad[]) {{ .name            = "default",
                                          .type            = AVMEDIA_TYPE_VIDEO,
                                          .rej_perms       = AV_PERM_WRITE,
                                          .request_frame   = request_frame,
                                          .config_props    = config_props},
                                        { .name = NULL}},
    .priv_class = &fps_class,
}

Definition at line 282 of file vf_fps.c.

const AVOption fps_options[] [static]

Initial value:

 {
    { "fps", "A string describing desired output framerate", OFFSET(fps), AV_OPT_TYPE_STRING, { .str = "25" }, .flags = V|F },
    { NULL },
}

Definition at line 60 of file vf_fps.c.