libavfilter/vf_fps.c File Reference

a filter enforcing given constant framerate More...

#include "libavutil/fifo.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.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
Functions
static av_cold int	init (AVFilterContext *ctx, const char *args, void *opaque)
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 void	end_frame (AVFilterLink *inlink)
static void	null_start_frame (AVFilterLink *link, AVFilterBufferRef *buf)
static void	null_draw_slice (AVFilterLink *link, int y, int h, int slice_dir)
Variables
static const AVOption	options []
class {
class_name = "FPS filter"
item_name = av_default_item_name
option = options
version = LIBAVUTIL_VERSION_INT
};
AVFilter	avfilter_vf_fps

---

Detailed Description

a filter enforcing given constant framerate

Definition in file vf_fps.c.

---

Define Documentation

#define OFFSET

(

x

)

offsetof(FPSContext, x)

Definition at line 54 of file vf_fps.c.

#define V   AV_OPT_FLAG_VIDEO_PARAM

Definition at line 55 of file vf_fps.c.

---

Function Documentation

static int config_props

(

AVFilterLink *

link

)

[static]

Definition at line 116 of file vf_fps.c.

static void end_frame

(

AVFilterLink *

inlink

)

[static]

Definition at line 171 of file vf_fps.c.

static void flush_fifo

(

AVFifoBuffer *

fifo

)

[static]

Definition at line 95 of file vf_fps.c.

Referenced by end_frame(), and uninit().

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

Definition at line 68 of file vf_fps.c.

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

Definition at line 251 of file vf_fps.c.

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

Definition at line 247 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 104 of file vf_fps.c.

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

Definition at line 159 of file vf_fps.c.

---

Variable Documentation

const { ... } [static]

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    = (AVFilterPad[]) {{ .name            = "default",
                                    .type            = AVMEDIA_TYPE_VIDEO,
                                    .start_frame     = null_start_frame,
                                    .draw_slice      = null_draw_slice,
                                    .end_frame       = end_frame, },
                                  { .name = NULL}},
    .outputs   = (AVFilterPad[]) {{ .name            = "default",
                                    .type            = AVMEDIA_TYPE_VIDEO,
                                    .request_frame   = request_frame,
                                    .config_props    = config_props},
                                  { .name = NULL}},
}

Definition at line 255 of file vf_fps.c.

class_name = "FPS filter"

Definition at line 62 of file vf_fps.c.

item_name = av_default_item_name

Definition at line 63 of file vf_fps.c.

option = options

Definition at line 64 of file vf_fps.c.

const AVOption options[] [static]

Initial value:

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

Definition at line 56 of file vf_fps.c.

version = LIBAVUTIL_VERSION_INT

Definition at line 65 of file vf_fps.c.