2 * Copyright (C) 2012 Olivier Crete <olivier.crete@collabora.com>
4 * gstdevice.c: Device discovery
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
26 #include "gst/gst_private.h"
28 #include <gst/gstdevice.h>
33 PROP_DISPLAY_NAME = 1,
44 struct _GstDevicePrivate
52 static guint signals[LAST_SIGNAL];
54 G_DEFINE_ABSTRACT_TYPE (GstDevice, gst_device, GST_TYPE_OBJECT);
56 static void gst_device_get_property (GObject * object, guint property_id,
57 GValue * value, GParamSpec * pspec);
58 static void gst_device_set_property (GObject * object, guint property_id,
59 const GValue * value, GParamSpec * pspec);
60 static void gst_device_finalize (GObject * object);
64 gst_device_class_init (GstDeviceClass * klass)
66 GObjectClass *object_class = G_OBJECT_CLASS (klass);
68 g_type_class_add_private (klass, sizeof (GstDevicePrivate));
70 object_class->get_property = gst_device_get_property;
71 object_class->set_property = gst_device_set_property;
72 object_class->finalize = gst_device_finalize;
74 g_object_class_install_property (object_class, PROP_DISPLAY_NAME,
75 g_param_spec_string ("display-name", "Display Name",
76 "The user-friendly name of the device", "",
77 G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
78 g_object_class_install_property (object_class, PROP_CAPS,
79 g_param_spec_boxed ("caps", "Device Caps",
80 "The possible caps of a device", GST_TYPE_CAPS,
81 G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
82 g_object_class_install_property (object_class, PROP_KLASS,
83 g_param_spec_string ("klass", "Device Class",
84 "The Class of the device", "",
85 G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
87 signals[REMOVED] = g_signal_new ("removed", G_TYPE_FROM_CLASS (klass),
88 G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 0);
92 gst_device_init (GstDevice * device)
94 device->priv = G_TYPE_INSTANCE_GET_PRIVATE (device, GST_TYPE_DEVICE,
99 gst_device_finalize (GObject * object)
101 GstDevice *device = GST_DEVICE (object);
103 gst_caps_replace (&device->priv->caps, NULL);
105 g_free (device->priv->display_name);
106 g_free (device->priv->klass);
108 G_OBJECT_CLASS (gst_device_parent_class)->finalize (object);
112 gst_device_get_property (GObject * object, guint prop_id,
113 GValue * value, GParamSpec * pspec)
115 GstDevice *gstdevice;
117 gstdevice = GST_DEVICE_CAST (object);
120 case PROP_DISPLAY_NAME:
121 g_value_take_string (value, gst_device_get_display_name (gstdevice));
124 if (gstdevice->priv->caps)
125 g_value_take_boxed (value, gst_device_get_caps (gstdevice));
128 g_value_take_string (value, gst_device_get_klass (gstdevice));
131 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
138 gst_device_set_property (GObject * object, guint prop_id,
139 const GValue * value, GParamSpec * pspec)
141 GstDevice *gstdevice;
143 gstdevice = GST_DEVICE_CAST (object);
146 case PROP_DISPLAY_NAME:
147 gstdevice->priv->display_name = g_value_dup_string (value);
150 gst_caps_replace (&gstdevice->priv->caps, g_value_get_boxed (value));
153 gstdevice->priv->klass = g_value_dup_string (value);
156 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
162 * gst_device_create_element:
163 * @device: a #GstDevice
164 * @name: (allow-none): name of new element, or NULL to automatically
165 * create a unique name.
167 * Returns: (transfer full): a new #GstElement configured to use this device
172 gst_device_create_element (GstDevice * device, const gchar * name)
174 GstDeviceClass *klass = GST_DEVICE_GET_CLASS (device);
176 if (klass->create_element)
177 return klass->create_element (device, name);
183 * gst_device_get_caps:
184 * @device: a #GstDevice
186 * Getter for the #GstCaps that this device supports.
188 * Returns: The #GstCaps supported by this device. Unref with
189 * gst_caps_unref() when done.
194 gst_device_get_caps (GstDevice * device)
196 if (device->priv->caps)
197 return gst_caps_ref (device->priv->caps);
203 * gst_device_get_display_name:
204 * @device: a #GstDevice
206 * Gets the user-friendly name of the device.
208 * Returns: The device name. Free with g_free() after use.
213 gst_device_get_display_name (GstDevice * device)
216 g_strdup (device->priv->display_name ? device->priv->display_name : "");
220 * gst_device_get_klass:
221 * @device: a #GstDevice
223 * Gets the "class" of a device. This is a "/" separated list of
224 * classes that represent this device. They are a subset of the
225 * classes of the #GstDeviceMonitor that produced this device.
227 * Returns: The device class. Free with g_free() after use.
232 gst_device_get_klass (GstDevice * device)
234 return g_strdup (device->priv->klass ? device->priv->klass : "");
238 * gst_device_reconfigure_element:
239 * @device: a #GstDevice
240 * @element: a #GstElement
242 * Tries to reconfigure an existing element to use the device. If this
243 * function fails, then one must destroy the element and create a new one
244 * using gst_device_create_element().
246 * Note: This should only be implemented for elements can change their
247 * device in the PLAYING state.
249 * Returns: %TRUE if the element could be reconfigured to use this device,
255 gst_device_reconfigure_element (GstDevice * device, GstElement * element)
257 GstDeviceClass *klass = GST_DEVICE_GET_CLASS (device);
259 if (klass->reconfigure_element)
260 return klass->reconfigure_element (device, element);
266 * gst_device_has_classesv:
267 * @device: a #GstDevice
268 * @classes: a %NULL terminated array of klasses to match, only match if all
269 * classes are matched
271 * Check if @factory matches all of the given classes
273 * Returns: %TRUE if @device matches.
278 gst_device_has_classesv (GstDevice * device, gchar ** classes)
280 g_return_val_if_fail (GST_IS_DEVICE (device), FALSE);
283 for (; classes[0]; classes++) {
287 if (classes[0] == '\0')
290 found = strstr (device->priv->klass, classes[0]);
294 if (found != device->priv->klass && *(found - 1) != '/')
297 len = strlen (classes[0]);
298 if (found[len] != 0 && found[len] != '/')
306 * gst_device_has_classes:
307 * @device: a #GstDevice
308 * @classes: a "/" separate list of klasses to match, only match if all classes
311 * Check if @device matches all of the given classes
313 * Returns: %TRUE if @device matches.
318 gst_device_has_classes (GstDevice * device, const gchar * classes)
323 classesv = g_strsplit (classes, "/", 0);
325 res = gst_device_has_classesv (device, classesv);
327 g_strfreev (classesv);