libavdevice/x11grab.c File Reference

X11 frame device demuxer by Clemens Fruhwirth <clemens@endorphin.org> and Edouard Gomez <ed.gomez@free.fr>. More...

#include "config.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include <time.h>
#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Xlibint.h>
#include <X11/Xproto.h>
#include <X11/Xutil.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
#include <X11/extensions/Xfixes.h>
#include "avdevice.h"

Go to the source code of this file.

Data Structures
struct	x11_grab
	X11 Device Demuxer context. More...
Defines
#define	OFFSET(x)   offsetof(struct x11_grab, x)
#define	DEC   AV_OPT_FLAG_DECODING_PARAM
Functions
static int	x11grab_read_header (AVFormatContext *s1, AVFormatParameters *ap)
	Initialize the x11 grab device demuxer (public device demuxer API).
static void	paint_mouse_pointer (XImage *image, struct x11_grab *s)
	Paint a mouse pointer in an X11 image.
static int	xget_zpixmap (Display *dpy, Drawable d, XImage *image, int x, int y)
	Read new data in the image structure.
static int	x11grab_read_packet (AVFormatContext *s1, AVPacket *pkt)
	Grab a frame from x11 (public device demuxer API).
static int	x11grab_read_close (AVFormatContext *s1)
	Close x11 frame grabber (public device demuxer API).
Variables
static const AVOption	options []
static const AVClass	x11_class
AVInputFormat	ff_x11_grab_device_demuxer
	x11 grabber device demuxer declaration

---

Detailed Description

X11 frame device demuxer by Clemens Fruhwirth <clemens@endorphin.org> and Edouard Gomez <ed.gomez@free.fr>.

Definition in file x11grab.c.

---

Define Documentation

#define DEC   AV_OPT_FLAG_DECODING_PARAM

Definition at line 466 of file x11grab.c.

#define OFFSET

(

x

)

offsetof(struct x11_grab, x)

Definition at line 465 of file x11grab.c.

---

Function Documentation

static void paint_mouse_pointer	(	XImage *	image,
		struct x11_grab *	s
	)			[static]

Paint a mouse pointer in an X11 image.

Parameters:

	image	image to paint the mouse pointer to
	s	context used to retrieve original grabbing rectangle coordinates

Definition at line 273 of file x11grab.c.

Referenced by x11grab_read_packet().

static int x11grab_read_close

(

AVFormatContext *

s1

)

[static]

Close x11 frame grabber (public device demuxer API).

Parameters:

s1

Context from avformat core

Returns:

0 success, !0 failure

Definition at line 443 of file x11grab.c.

static int x11grab_read_header	(	AVFormatContext *	s1,
		AVFormatParameters *	ap
	)			[static]

Initialize the x11 grab device demuxer (public device demuxer API).

Parameters:

	s1	Context from avformat core
	ap	Parameters from avformat core

Returns:

• AVERROR(ENOMEM) no memory left
• AVERROR(EIO) other failure case
• 0 success

Definition at line 89 of file x11grab.c.

static int x11grab_read_packet	(	AVFormatContext *	s1,
		AVPacket *	pkt
	)			[static]

Grab a frame from x11 (public device demuxer API).

Parameters:

	s1	Context from avformat core
	pkt	Packet holding the brabbed frame

Returns:

frame size in bytes

Definition at line 385 of file x11grab.c.

static int xget_zpixmap	(	Display *	dpy,
		Drawable	d,
		XImage *	image,
		int	x,
		int	y
	)			[static]

Read new data in the image structure.

Parameters:

	dpy	X11 display to grab from
	d
	image	Image where the grab will be put
	x	Top-Left grabbing rectangle horizontal coordinate
	y	Top-Left grabbing rectangle vertical coordinate

Returns:

0 if error, !0 if successful

Definition at line 341 of file x11grab.c.

Referenced by x11grab_read_packet().

---

Variable Documentation

AVInputFormat ff_x11_grab_device_demuxer

Initial value:

{
    "x11grab",
    NULL_IF_CONFIG_SMALL("X11grab"),
    sizeof(struct x11_grab),
    NULL,
    x11grab_read_header,
    x11grab_read_packet,
    x11grab_read_close,
    .flags = AVFMT_NOFILE,
    .priv_class = &x11_class,
}

x11 grabber device demuxer declaration

Definition at line 481 of file x11grab.c.

const AVOption options[] [static]

Initial value:

 {
    { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = "vga"}, 0, 0, DEC },
    { "framerate", "", OFFSET(framerate), FF_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
    { NULL },
}

Definition at line 467 of file x11grab.c.

const AVClass x11_class [static]

Initial value:

 {
    .class_name = "X11grab indev",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 473 of file x11grab.c.