mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-22 08:17:01 +00:00
862d28a1b7
Original commit message from CVS: Some interface implementations for video4linux/video4linux2 plugins: * a Tuner interface, with which one can select inputs and stations. Audio work is underway here, but unfinished. * A Xoverlay interface with which one can do simple overlay. Similar to the API of the v4l/Xv XFree86 extension. Widget implementation for GTK-2.0 coming up in the sandbox. * Colorbalance - for adapting colors (brightness, contrast, etc.) - pretty basic and maybe somewhat overdesigned. But it'll do for now. Apart from these interfaces, there's also a loadable library 'xwindowlistener' that listenes to X for the movement of a window and the overlap of other windows. This is partly copied from xawtv (and thus partly GPL :(), but it's needed for the xoverlay interface implementation in the v4l/v4l2 elements. Lastly, some small changes to remove redundant properties from the v4l/v4l2 elements since these can be done much simpler. Comments appreciated!
102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/* 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))
|
|
|
|
|
|
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;
|
|
|
|
/* caching values */
|
|
gchar *display;
|
|
};
|
|
|
|
struct _GstV4l2ElementClass {
|
|
GstElementClass parent_class;
|
|
|
|
/* signals */
|
|
void (*open) (GstElement *element,
|
|
const gchar *device);
|
|
void (*close) (GstElement *element,
|
|
const gchar *device);
|
|
};
|
|
|
|
|
|
GType gst_v4l2element_get_type (void);
|
|
|
|
gboolean gst_v4l2element_factory_init (GstPlugin *plugin);
|
|
|
|
#endif /* __GST_V4L2ELEMENT_H__ */
|