Changes proposed by Wingo in bug #338818.

Original commit message from CVS:
Changes proposed by Wingo in bug #338818.

1 files changed, 211 insertions, 0 deletions

diff --git a/sys/v4l2/gstv4l2object.h b/sys/v4l2/gstv4l2object.h
new file mode 100644
index 00000000..37552185
--- /dev/null
+++ b/sys/v4l2/gstv4l2object.h
@@ -0,0 +1,211 @@
+/* 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_V4L2OBJECT_H__
+#define __GST_V4L2OBJECT_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
+
+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_v4l2object_get_type(void);
+
+
+#define OPEN_V4L2OBJECT_PROPS			\
+  enum {					\
+    PROP_0,					\
+    PROP_DEVICE,				\
+    PROP_DEVICE_NAME,				\
+    PROP_FLAGS,					\
+    PROP_STD,					\
+    PROP_INPUT,					\
+    PROP_FREQUENCY
+
+#define CLOSE_V4L2OBJECT_PROPS   };
+
+extern GstV4l2Object *
+gst_v4l2object_new (GstElement * element,
+                    GstV4l2GetInOutFunction get_in_out_func,
+                    GstV4l2SetInOutFunction set_in_out_func,
+		    GstV4l2UpdateFpsFunction   update_fps_func);
+
+extern void
+gst_v4l2object_destroy (GstV4l2Object ** v4l2object);
+
+extern void
+gst_v4l2object_install_properties_helper (GObjectClass *gobject_class);
+
+extern gboolean
+gst_v4l2object_set_property_helper (GstV4l2Object *v4l2object,
+				    guint prop_id, const GValue * value, GParamSpec * pspec);
+extern gboolean
+gst_v4l2object_get_property_helper (GstV4l2Object *v4l2object,
+				    guint prop_id, GValue * value, GParamSpec * pspec);
+
+extern gboolean gst_v4l2object_start (GstV4l2Object *v4l2object);
+extern gboolean gst_v4l2object_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_V4L2OBJECT_H__ */