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/* G-Streamer generic V4L2 element
* Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_V4L2ELEMENT_H__
#define __GST_V4L2ELEMENT_H__
#include <gst/gst.h>
#include <gst/xwindowlistener/xwindowlistener.h>
/* Because of some really cool feature in video4linux1, also known as
* 'not including sys/types.h and sys/time.h', we had to include it
* ourselves. In all their intelligence, these people decided to fix
* this in the next version (video4linux2) in such a cool way that it
* breaks all compilations of old stuff...
* The real problem is actually that linux/time.h doesn't use proper
* macro checks before defining types like struct timeval. The proper
* fix here is to either fuck the kernel header (which is what we do
* by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
* upstream, which I'll consider doing later on. If you get compiler
* errors here, check your linux/time.h && sys/time.h header setup.
*/
#include <sys/types.h>
#include <linux/types.h>
#define _LINUX_TIME_H
#include <linux/videodev2.h>
#define GST_TYPE_V4L2ELEMENT \
(gst_v4l2element_get_type())
#define GST_V4L2ELEMENT(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_V4L2ELEMENT, GstV4l2Element))
#define GST_V4L2ELEMENT_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_V4L2ELEMENT, GstV4l2ElementClass))
#define GST_IS_V4L2ELEMENT(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_V4L2ELEMENT))
#define GST_IS_V4L2ELEMENT_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_V4L2ELEMENT))
#define GST_V4L2ELEMENT_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_V4L2ELEMENT, GstV4l2ElementClass))
typedef struct _GstV4l2Element GstV4l2Element;
typedef struct _GstV4l2ElementClass GstV4l2ElementClass;
struct _GstV4l2Element {
GstElement element;
/* the video device */
char *device;
/* the video-device's file descriptor */
gint video_fd;
/* the video buffer (mmap()'ed) */
guint8 **buffer;
/* the video-device's capabilities */
struct v4l2_capability vcap;
/* the toys available to us */
GList *channels;
GList *norms;
GList *colors;
/* X-overlay */
GstXWindowListener *overlay;
XID xwindow_id;
/* properties */
gchar *norm;
gchar *channel;
gulong frequency;
/* caching values */
gchar *display;
};
struct _GstV4l2ElementClass {
GstElementClass parent_class;
/* probed devices */
GList *devices;
/* signals */
void (*open) (GstElement *element,
const gchar *device);
void (*close) (GstElement *element,
const gchar *device);
};
GType gst_v4l2element_get_type (void);
#endif /* __GST_V4L2ELEMENT_H__ */
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