ext/raw1394/: Implement GstPropertyProbe interface and add "device-name" property, so applications can use this to pr...

Original commit message from CVS:
Patch by: Julien Puydt <julien dot puydt at laposte net>
* ext/raw1394/Makefile.am:
* ext/raw1394/gst1394probe.c: (gst_1394_get_guid_array),
(gst_1394_property_probe_get_properties),
(gst_1394_property_probe_probe_property),
(gst_1394_property_probe_needs_probe),
(gst_1394_property_probe_get_values),
(gst_1394_property_probe_interface_init),
(gst_1394_type_add_property_probe_interface):
* ext/raw1394/gst1394probe.h: (GST_1394_PROBE_H):
* ext/raw1394/gstdv1394src.c: (_do_init), (gst_dv1394src_class_init),
(gst_dv1394src_init), (gst_dv1394src_dispose),
(gst_dv1394src_set_property), (gst_dv1394src_get_property),
(gst_dv1394src_discover_avc_node), (gst_dv1394src_query),
(gst_dv1394src_update_device_name):
* ext/raw1394/gstdv1394src.h:
Implement GstPropertyProbe interface and add "device-name" property,
so applications can use this to probe for available devices in the
same way they can already with v4lsrc and v4l2src (however horrible
this property probe interface may be). Fixes #358841.

1 files changed, 140 insertions, 0 deletions

diff --git a/ext/raw1394/gst1394probe.c b/ext/raw1394/gst1394probe.c
new file mode 100644
index 00000000..ee51ba0c
--- /dev/null
+++ b/ext/raw1394/gst1394probe.c
@@ -0,0 +1,140 @@
+/* GStreamer
+ * Copyright (C) 2007 Julien Puydt <jpuydt@free.fr>
+ *
+ * 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.
+ */
+
+#include <libavc1394/avc1394.h>
+#include <libavc1394/avc1394_vcr.h>
+#include <libavc1394/rom1394.h>
+#include <libraw1394/raw1394.h>
+
+#include <gst/gst.h>
+
+#include "gst1394probe.h"
+#include "gst/interfaces/propertyprobe.h"
+
+static GValueArray *
+gst_1394_get_guid_array (void)
+{
+  GValueArray *result = NULL;
+  raw1394handle_t handle = NULL;
+  int num_ports = 0;
+  int port = 0;
+  int num_nodes = 0;
+  int node = 0;
+  rom1394_directory directory;
+  GValue value = { 0, };
+
+  handle = raw1394_new_handle ();
+
+  if (handle == NULL)
+    return NULL;
+
+  num_ports = raw1394_get_port_info (handle, NULL, 0);
+  for (port = 0; port < num_ports; port++) {
+    if (raw1394_set_port (handle, port) >= 0) {
+      num_nodes = raw1394_get_nodecount (handle);
+      for (node = 0; node < num_nodes; node++) {
+        rom1394_get_directory (handle, node, &directory);
+        if (rom1394_get_node_type (&directory) == ROM1394_NODE_TYPE_AVC &&
+            avc1394_check_subunit_type (handle, node,
+                AVC1394_SUBUNIT_TYPE_VCR)) {
+          if (result == NULL)
+            result = g_value_array_new (3);     /* looks like a sensible default */
+          g_value_init (&value, G_TYPE_UINT64);
+          g_value_set_uint64 (&value, rom1394_get_guid (handle, node));
+          g_value_array_append (result, &value);
+          g_value_unset (&value);
+        }
+      }
+    }
+  }
+
+  return result;
+}
+
+static const GList *
+gst_1394_property_probe_get_properties (GstPropertyProbe * probe)
+{
+  static GList *result = NULL;
+  GObjectClass *klass = NULL;
+  GParamSpec *spec = NULL;
+
+  if (result == NULL) {
+    klass = G_OBJECT_GET_CLASS (probe);
+    spec = g_object_class_find_property (klass, "guid");
+    result = g_list_append (result, spec);
+  }
+
+  return result;
+}
+
+static void
+gst_1394_property_probe_probe_property (GstPropertyProbe * probe, guint prop_id,
+    const GParamSpec * pspec)
+{
+  if (!g_str_equal (pspec->name, "guid"))
+    G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+}
+
+static gboolean
+gst_1394_property_probe_needs_probe (GstPropertyProbe * probe, guint prop_id,
+    const GParamSpec * pspec)
+{
+  return TRUE;
+}
+
+static GValueArray *
+gst_1394_property_probe_get_values (GstPropertyProbe * probe, guint prop_id,
+    const GParamSpec * pspec)
+{
+  GValueArray *result = NULL;
+
+  if (!g_str_equal (pspec->name, "guid")) {
+    G_OBJECT_WARN_INVALID_PROPERTY_ID (probe, prop_id, pspec);
+    return NULL;
+  }
+
+  result = gst_1394_get_guid_array ();
+
+  if (result == NULL)
+    GST_LOG_OBJECT (probe, "No guid found");
+
+  return result;
+}
+
+static void
+gst_1394_property_probe_interface_init (GstPropertyProbeInterface * iface)
+{
+  iface->get_properties = gst_1394_property_probe_get_properties;
+  iface->probe_property = gst_1394_property_probe_probe_property;
+  iface->needs_probe = gst_1394_property_probe_needs_probe;
+  iface->get_values = gst_1394_property_probe_get_values;
+}
+
+void
+gst_1394_type_add_property_probe_interface (GType type)
+{
+  static const GInterfaceInfo probe_iface_info = {
+    (GInterfaceInitFunc) gst_1394_property_probe_interface_init,
+    NULL,
+    NULL,
+  };
+
+  g_type_add_interface_static (type, GST_TYPE_PROPERTY_PROBE,
+      &probe_iface_info);
+}