mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
210 lines
8.4 KiB
C
210 lines
8.4 KiB
C
/* GStreamer
|
|
*
|
|
* gstv4l2object.h: base class for V4L2 elements
|
|
*
|
|
* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
|
|
* Copyright (C) 2006 Edgard Lima <edgard.lima@indt.org.br>
|
|
*
|
|
* 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_V4L2_OBJECT_H__
|
|
#define __GST_V4L2_OBJECT_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
|
|
#define __user
|
|
#include <linux/videodev2.h>
|
|
|
|
#include <gst/gst.h>
|
|
#include <gst/base/gstpushsrc.h>
|
|
|
|
#include <gst/interfaces/propertyprobe.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
#define GST_V4L2_OBJECT(obj) (GstV4l2Object *)(obj)
|
|
|
|
typedef struct _GstV4l2Object GstV4l2Object;
|
|
typedef struct _GstV4l2ObjectClassHelper GstV4l2ObjectClassHelper;
|
|
typedef struct _GstV4l2Xv GstV4l2Xv;
|
|
|
|
typedef gboolean (*GstV4l2GetInOutFunction) (GstV4l2Object * v4l2object, gint * input);
|
|
typedef gboolean (*GstV4l2SetInOutFunction) (GstV4l2Object * v4l2object, gint input);
|
|
typedef gboolean (*GstV4l2UpdateFpsFunction) (GstV4l2Object * v4l2object);
|
|
|
|
struct _GstV4l2Object {
|
|
GstElement * element;
|
|
|
|
/* the video device */
|
|
char *videodev;
|
|
|
|
/* 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 video device's window properties */
|
|
struct v4l2_window vwin;
|
|
|
|
/* some more info about the current input's capabilities */
|
|
struct v4l2_input vinput;
|
|
|
|
/* lists... */
|
|
GList *colors;
|
|
GList *stds;
|
|
GList *inputs;
|
|
|
|
/* properties */
|
|
gchar *std;
|
|
gchar *input;
|
|
gulong frequency;
|
|
|
|
|
|
/* X-overlay */
|
|
GstV4l2Xv *xv;
|
|
gulong xwindow_id;
|
|
|
|
/* funcs */
|
|
GstV4l2GetInOutFunction get_in_out_func;
|
|
GstV4l2SetInOutFunction set_in_out_func;
|
|
GstV4l2UpdateFpsFunction update_fps_func;
|
|
|
|
};
|
|
|
|
struct _GstV4l2ObjectClassHelper {
|
|
/* probed devices */
|
|
GList *devices;
|
|
|
|
};
|
|
|
|
|
|
GType gst_v4l2_object_get_type(void);
|
|
|
|
|
|
#define V4L2_STD_OBJECT_PROPS \
|
|
PROP_DEVICE, \
|
|
PROP_DEVICE_NAME, \
|
|
PROP_FLAGS, \
|
|
PROP_STD, \
|
|
PROP_INPUT, \
|
|
PROP_FREQUENCY
|
|
|
|
|
|
extern GstV4l2Object *
|
|
gst_v4l2_object_new (GstElement * element,
|
|
GstV4l2GetInOutFunction get_in_out_func,
|
|
GstV4l2SetInOutFunction set_in_out_func,
|
|
GstV4l2UpdateFpsFunction update_fps_func);
|
|
|
|
extern void
|
|
gst_v4l2_object_destroy (GstV4l2Object ** v4l2object);
|
|
|
|
extern void
|
|
gst_v4l2_object_install_properties_helper (GObjectClass *gobject_class);
|
|
|
|
extern gboolean
|
|
gst_v4l2_object_set_property_helper (GstV4l2Object *v4l2object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec);
|
|
extern gboolean
|
|
gst_v4l2_object_get_property_helper (GstV4l2Object *v4l2object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec);
|
|
|
|
extern gboolean gst_v4l2_object_start (GstV4l2Object *v4l2object);
|
|
extern gboolean gst_v4l2_object_stop (GstV4l2Object *v4l2object);
|
|
|
|
extern const GList *
|
|
gst_v4l2_probe_get_properties (GstPropertyProbe * probe);
|
|
|
|
extern void
|
|
gst_v4l2_probe_probe_property (GstPropertyProbe * probe,
|
|
guint prop_id,
|
|
const GParamSpec * pspec,
|
|
GList ** klass_devices);
|
|
|
|
extern gboolean
|
|
gst_v4l2_probe_needs_probe (GstPropertyProbe * probe,
|
|
guint prop_id,
|
|
const GParamSpec * pspec,
|
|
GList ** klass_devices);
|
|
|
|
extern GValueArray *
|
|
gst_v4l2_probe_get_values (GstPropertyProbe * probe,
|
|
guint prop_id,
|
|
const GParamSpec * pspec,
|
|
GList ** klass_devices);
|
|
|
|
#define GST_IMPLEMENT_V4L2_PROBE_METHODS(Type_Class, interface_as_function) \
|
|
\
|
|
static void \
|
|
interface_as_function ## _probe_probe_property (GstPropertyProbe * probe, \
|
|
guint prop_id, \
|
|
const GParamSpec * pspec) \
|
|
{ \
|
|
Type_Class *this_class = (Type_Class*) probe; \
|
|
gst_v4l2_probe_probe_property (probe, prop_id, pspec, \
|
|
&this_class->v4l2_class_devices); \
|
|
} \
|
|
\
|
|
static gboolean \
|
|
interface_as_function ## _probe_needs_probe (GstPropertyProbe * probe, \
|
|
guint prop_id, \
|
|
const GParamSpec * pspec) \
|
|
{ \
|
|
Type_Class *this_class = (Type_Class*) probe; \
|
|
return gst_v4l2_probe_needs_probe (probe, prop_id, pspec, \
|
|
&this_class->v4l2_class_devices); \
|
|
} \
|
|
\
|
|
static GValueArray * \
|
|
interface_as_function ## _probe_get_values (GstPropertyProbe * probe, \
|
|
guint prop_id, \
|
|
const GParamSpec * pspec) \
|
|
{ \
|
|
Type_Class *this_class = (Type_Class*) probe; \
|
|
return gst_v4l2_probe_get_values (probe, prop_id, pspec, \
|
|
&this_class->v4l2_class_devices); \
|
|
} \
|
|
\
|
|
static void \
|
|
interface_as_function ## _property_probe_interface_init (GstPropertyProbeInterface * iface) \
|
|
{ \
|
|
iface->get_properties = gst_v4l2_probe_get_properties; \
|
|
iface->probe_property = interface_as_function ## _probe_probe_property; \
|
|
iface->needs_probe = interface_as_function ## _probe_needs_probe; \
|
|
iface->get_values = interface_as_function ## _probe_get_values; \
|
|
}
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_V4L2_OBJECT_H__ */
|