| /* 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__ */ |
