mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-06-30 20:00:41 +00:00
globaldevicemonitor: Add device monitor aggregator
https://bugzilla.gnome.org/show_bug.cgi?id=678402
This commit is contained in:
Olivier Crête
Tim-Philipp Müller
parent
1b7c5c4d64
commit
448d180cdf
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@ -80,6 +80,7 @@ libgstreamer_@GST_API_VERSION@_la_SOURCES = \
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gstevent.c \
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gstformat.c \
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gstghostpad.c \
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gstglobaldevicemonitor.c \
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gstinfo.c \
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gstiterator.c \
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gstatomicqueue.c \
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@ -183,6 +184,7 @@ gst_headers = \
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gstevent.h \
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gstformat.h \
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gstghostpad.h \
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gstglobaldevicemonitor.h \
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gstinfo.h \
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gstiterator.h \
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gstatomicqueue.h \
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@ -49,6 +49,7 @@
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#include <gst/gsterror.h>
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#include <gst/gstevent.h>
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#include <gst/gstghostpad.h>
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#include <gst/gstglobaldevicemonitor.h>
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#include <gst/gstinfo.h>
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#include <gst/gstiterator.h>
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#include <gst/gstmessage.h>
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428
gst/gstglobaldevicemonitor.c
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428
gst/gstglobaldevicemonitor.c
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@ -0,0 +1,428 @@
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/* GStreamer
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* Copyright (C) 2013 Olivier Crete <olivier.crete@collabora.com>
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*
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* gstglobaldevicemonitor.c: Global device monitor
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gstglobaldevicemonitor.h>
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#include "gst/gst_private.h"
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#include <gst/gst.h>
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struct _GstGlobalDeviceMonitorPrivate
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{
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gboolean started;
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GstBus *bus;
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GPtrArray *monitors;
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guint cookie;
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GstCaps *caps;
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GstDeviceMonitorFactoryListType type;
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};
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G_DEFINE_TYPE (GstGlobalDeviceMonitor, gst_global_device_monitor,
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GST_TYPE_OBJECT);
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static void gst_global_device_monitor_dispose (GObject * object);
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static void
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gst_global_device_monitor_class_init (GstGlobalDeviceMonitorClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GstGlobalDeviceMonitorPrivate));
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object_class->dispose = gst_global_device_monitor_dispose;
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}
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static void
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bus_sync_message (GstBus * bus, GstMessage * message,
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GstGlobalDeviceMonitor * monitor)
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{
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if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_EXTENDED &&
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(gst_message_get_extended_type (message) == GST_MESSAGE_DEVICE_ADDED ||
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gst_message_get_extended_type (message) ==
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GST_MESSAGE_DEVICE_REMOVED)) {
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gboolean intersects;
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GstCaps *caps;
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GstDevice *device;
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if (gst_message_get_extended_type (message) == GST_MESSAGE_DEVICE_ADDED)
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gst_message_parse_device_added (message, &device);
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else
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gst_message_parse_device_removed (message, &device);
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GST_OBJECT_LOCK (monitor);
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caps = gst_device_get_caps (device);
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intersects = gst_caps_can_intersect (monitor->priv->caps, caps);
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gst_caps_unref (caps);
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GST_OBJECT_UNLOCK (monitor);
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if (intersects)
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gst_bus_post (monitor->priv->bus, gst_message_ref (message));
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}
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}
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static void
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gst_global_device_monitor_init (GstGlobalDeviceMonitor * self)
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{
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GList *factories;
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
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GST_TYPE_GLOBAL_DEVICE_MONITOR, GstGlobalDeviceMonitorPrivate);
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self->priv->bus = gst_bus_new ();
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gst_bus_set_flushing (self->priv->bus, TRUE);
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self->priv->monitors = g_ptr_array_new ();
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self->priv->caps = gst_caps_new_any ();
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self->priv->type = GST_DEVICE_MONITOR_FACTORY_TYPE_SINK |
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GST_DEVICE_MONITOR_FACTORY_TYPE_SRC;
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factories =
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gst_device_monitor_factory_list_get_device_monitors (self->priv->type, 1);
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while (factories) {
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GstDeviceMonitorFactory *factory = factories->data;
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GstDeviceMonitor *monitor;
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factories = g_list_remove (factories, factory);
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monitor = gst_device_monitor_factory_get (factory);
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if (monitor) {
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GstBus *bus = gst_device_monitor_get_bus (monitor);
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gst_bus_enable_sync_message_emission (bus);
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g_signal_connect (monitor, "sync-message::extended",
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G_CALLBACK (bus_sync_message), self);
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g_ptr_array_add (self->priv->monitors, monitor);
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}
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gst_object_unref (factory);
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}
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}
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static void
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gst_global_device_monitor_remove (GstGlobalDeviceMonitor * self, guint i)
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{
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GstDeviceMonitor *monitor = g_ptr_array_index (self->priv->monitors, i);
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GstBus *bus;
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g_ptr_array_remove_index_fast (self->priv->monitors, i);
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bus = gst_device_monitor_get_bus (monitor);
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g_signal_handlers_disconnect_by_func (bus, bus_sync_message, self);
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gst_object_unref (bus);
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gst_object_unref (monitor);
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}
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static void
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gst_global_device_monitor_dispose (GObject * object)
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{
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GstGlobalDeviceMonitor *self = GST_GLOBAL_DEVICE_MONITOR (object);
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g_return_if_fail (self->priv->started == FALSE);
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if (self->priv->monitors) {
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while (self->priv->monitors->len)
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gst_global_device_monitor_remove (self, self->priv->monitors->len - 1);
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g_ptr_array_unref (self->priv->monitors);
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self->priv->monitors = NULL;
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}
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gst_caps_replace (&self->priv->caps, NULL);
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gst_object_replace ((GstObject **) & self->priv->bus, NULL);
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G_OBJECT_CLASS (gst_global_device_monitor_parent_class)->dispose (object);
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}
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/**
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* gst_global_device_monitor_get_devices:
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* @monitor: A #GstDeviceMonitor
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*
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* Gets a list of devices from all of the relevant monitors. This may actually
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* probe the hardware if the global monitor is not currently started.
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*
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* Returns: (transfer full) (element-type GstDevice): a #GList of
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* #GstDevice
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*/
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GList *
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gst_global_device_monitor_get_devices (GstGlobalDeviceMonitor * self)
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{
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GList *devices = NULL;
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guint i;
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guint cookie;
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g_return_val_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self), NULL);
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GST_OBJECT_LOCK (self);
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again:
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g_list_free_full (devices, gst_object_unref);
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devices = NULL;
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cookie = self->priv->cookie;
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for (i = 0; i < self->priv->monitors->len; i++) {
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GList *tmpdev;
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GstDeviceMonitor *monitor =
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gst_object_ref (g_ptr_array_index (self->priv->monitors, i));
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GList *item;
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GST_OBJECT_UNLOCK (self);
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tmpdev = gst_device_monitor_get_devices (monitor);
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for (item = tmpdev; item; item = item->next) {
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GstDevice *dev = GST_DEVICE (item->data);
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GstCaps *caps = gst_device_get_caps (dev);
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if (gst_caps_can_intersect (self->priv->caps, caps))
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devices = g_list_prepend (devices, gst_object_ref (dev));
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gst_caps_unref (caps);
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}
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g_list_free_full (tmpdev, gst_object_unref);
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gst_object_unref (monitor);
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GST_OBJECT_LOCK (self);
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if (self->priv->cookie != cookie)
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goto again;
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}
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GST_OBJECT_UNLOCK (self);
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return devices;
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}
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/**
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* gst_global_device_monitor_start:
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* @monitor: A #GstGlobalDeviceMonitor
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*
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* Starts monitoring the devices, one this has succeeded, the
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* #GstGlobalDeviceMonitor:added and #GstGlobalDeviceMonitor:removed
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* signals will be emitted when the list of devices changes.
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*
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* Returns: %TRUE if the device monitoring could be started
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*/
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gboolean
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gst_global_device_monitor_start (GstGlobalDeviceMonitor * self)
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{
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guint i;
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g_return_val_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self), FALSE);
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GST_OBJECT_LOCK (self);
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if (self->priv->monitors->len == 0) {
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GST_OBJECT_UNLOCK (self);
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return FALSE;
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}
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gst_bus_set_flushing (self->priv->bus, FALSE);
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for (i = 0; i < self->priv->monitors->len; i++) {
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if (!gst_device_monitor_start (g_ptr_array_index (self->priv->monitors, i))) {
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gst_bus_set_flushing (self->priv->bus, TRUE);
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for (; i != 0; i--)
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gst_device_monitor_stop (g_ptr_array_index (self->priv->monitors,
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i - 1));
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GST_OBJECT_UNLOCK (self);
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return FALSE;
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}
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}
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self->priv->started = TRUE;
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GST_OBJECT_UNLOCK (self);
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return TRUE;
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}
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/**
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* gst_global_device_monitor_stop:
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* @monitor: A #GstDeviceMonitor
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*
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* Stops monitoring the devices.
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*/
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void
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gst_global_device_monitor_stop (GstGlobalDeviceMonitor * self)
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{
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guint i;
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g_return_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self));
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gst_bus_set_flushing (self->priv->bus, TRUE);
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GST_OBJECT_LOCK (self);
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for (i = 0; i < self->priv->monitors->len; i++)
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gst_device_monitor_stop (g_ptr_array_index (self->priv->monitors, i));
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self->priv->started = FALSE;
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GST_OBJECT_UNLOCK (self);
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}
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void
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gst_global_device_monitor_set_type_filter (GstGlobalDeviceMonitor * self,
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GstDeviceMonitorFactoryListType type)
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{
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GList *factories = NULL;
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guint i;
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g_return_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self));
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g_return_if_fail (!self->priv->started);
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g_return_if_fail (type &
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(GST_DEVICE_MONITOR_FACTORY_TYPE_SINK |
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GST_DEVICE_MONITOR_FACTORY_TYPE_SRC));
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GST_OBJECT_LOCK (self);
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if (self->priv->type == type) {
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GST_OBJECT_UNLOCK (self);
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return;
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}
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self->priv->type = type;
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factories =
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gst_device_monitor_factory_list_get_device_monitors (self->priv->type, 1);
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for (i = 0; i < self->priv->monitors->len; i++) {
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GstDeviceMonitor *monitor = g_ptr_array_index (self->priv->monitors, i);
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GstDeviceMonitorFactory *f = gst_device_monitor_get_factory (monitor);
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GList *item;
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item = g_list_find (factories, f);
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if (item) {
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/* If the item is in our list, then remove it from the list of factories,
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* we don't have it to re-create it later
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*/
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factories = g_list_remove_link (factories, item);
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gst_object_unref (f);
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} else {
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/* If it's not in our list, them remove it from the list of monitors.
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*/
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self->priv->cookie++;
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gst_global_device_monitor_remove (self, i);
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i--;
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}
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}
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while (factories) {
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GstDeviceMonitorFactory *factory = factories->data;
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GstDeviceMonitor *monitor;
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factories = g_list_remove (factories, factory);
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monitor = gst_device_monitor_factory_get (factory);
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if (monitor) {
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GstBus *bus = gst_device_monitor_get_bus (monitor);
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gst_bus_enable_sync_message_emission (bus);
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g_signal_connect (bus, "sync-message::extended",
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G_CALLBACK (bus_sync_message), self);
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gst_object_unref (bus);
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g_ptr_array_add (self->priv->monitors, monitor);
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self->priv->cookie++;
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}
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gst_object_unref (factory);
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}
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GST_OBJECT_UNLOCK (self);
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}
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GstDeviceMonitorFactoryListType
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gst_global_device_monitor_get_type_filter (GstGlobalDeviceMonitor * self)
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{
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GstDeviceMonitorFactoryListType res;
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g_return_val_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self), 0);
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GST_OBJECT_LOCK (self);
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res = self->priv->type;
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GST_OBJECT_UNLOCK (self);
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return res;
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}
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void
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gst_global_device_monitor_set_caps_filter (GstGlobalDeviceMonitor * self,
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GstCaps * caps)
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{
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g_return_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self));
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g_return_if_fail (GST_IS_CAPS (caps));
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GST_OBJECT_LOCK (self);
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gst_caps_replace (&self->priv->caps, caps);
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GST_OBJECT_UNLOCK (self);
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}
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GstCaps *
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gst_global_device_monitor_get_caps_filter (GstGlobalDeviceMonitor * self)
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{
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GstCaps *res;
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g_return_val_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self), NULL);
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GST_OBJECT_LOCK (self);
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res = gst_caps_ref (self->priv->caps);
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GST_OBJECT_UNLOCK (self);
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return res;
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}
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GstGlobalDeviceMonitor *
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gst_global_device_monitor_new (void)
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{
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return g_object_new (GST_TYPE_GLOBAL_DEVICE_MONITOR, NULL);
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}
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/**
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* gst_global_device_monitor_get_bus:
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* @monitor: a #GstDeviceMonitor
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*
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* Gets the #GstBus of this #GstGlobalDeviceMonitor
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*
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* Returns: (transfer full): a #GstBus
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*/
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GstBus *
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gst_global_device_monitor_get_bus (GstGlobalDeviceMonitor * monitor)
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{
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g_return_val_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (monitor), NULL);
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return gst_object_ref (monitor->priv->bus);
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}
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93
gst/gstglobaldevicemonitor.h
Normal file
93
gst/gstglobaldevicemonitor.h
Normal file
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@ -0,0 +1,93 @@
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/* GStreamer
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* Copyright (C) 2013 Olivier Crete <olivier.crete@collabora.com>
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*
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* gstglobaldevicemonitor.c: Global device monitor
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*
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* 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
|
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* version 2 of the License, or (at your option) any later version.
|
||||
*
|
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* 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.
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*/
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|
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#ifndef __GST_GLOBAL_DEVICE_MONITOR_H__
|
||||
#define __GST_GLOBAL_DEVICE_MONITOR_H__
|
||||
|
||||
#include <gst/gstobject.h>
|
||||
#include <gst/gstdevice.h>
|
||||
#include <gst/gstdevicemonitor.h>
|
||||
#include <gst/gstdevicemonitorfactory.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
typedef struct _GstGlobalDeviceMonitor GstGlobalDeviceMonitor;
|
||||
typedef struct _GstGlobalDeviceMonitorPrivate GstGlobalDeviceMonitorPrivate;
|
||||
typedef struct _GstGlobalDeviceMonitorClass GstGlobalDeviceMonitorClass;
|
||||
|
||||
#define GST_TYPE_GLOBAL_DEVICE_MONITOR (gst_global_device_monitor_get_type())
|
||||
#define GST_IS_GLOBAL_DEVICE_MONITOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GLOBAL_DEVICE_MONITOR))
|
||||
#define GST_IS_GLOBAL_DEVICE_MONITOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GLOBAL_DEVICE_MONITOR))
|
||||
#define GST_GLOBAL_DEVICE_MONITOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_GLOBAL_DEVICE_MONITOR, GstGlobalDeviceMonitorClass))
|
||||
#define GST_GLOBAL_DEVICE_MONITOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GLOBAL_DEVICE_MONITOR, GstGlobalDeviceMonitor))
|
||||
#define GST_GLOBAL_DEVICE_MONITOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GLOBAL_DEVICE_MONITOR, GstGlobalDeviceMonitorClass))
|
||||
#define GST_GLOBAL_DEVICE_MONITOR_CAST(obj) ((GstGlobalDeviceMonitor *)(obj))
|
||||
|
||||
|
||||
struct _GstGlobalDeviceMonitor {
|
||||
GstObject parent;
|
||||
|
||||
/*< private >*/
|
||||
|
||||
GstGlobalDeviceMonitorPrivate *priv;
|
||||
|
||||
gpointer _gst_reserved[GST_PADDING];
|
||||
};
|
||||
|
||||
struct _GstGlobalDeviceMonitorClass {
|
||||
GstObjectClass parent_class;
|
||||
|
||||
/*< private >*/
|
||||
gpointer _gst_reserved[GST_PADDING];
|
||||
};
|
||||
|
||||
GType gst_global_device_monitor_get_type (void);
|
||||
|
||||
GstGlobalDeviceMonitor * gst_global_device_monitor_new (void);
|
||||
|
||||
GList * gst_global_device_monitor_get_devices (GstGlobalDeviceMonitor * monitor);
|
||||
|
||||
gboolean gst_global_device_monitor_start (GstGlobalDeviceMonitor * monitor);
|
||||
void gst_global_device_monitor_stop (GstGlobalDeviceMonitor * monitor);
|
||||
|
||||
|
||||
void gst_global_device_monitor_set_type_filter (
|
||||
GstGlobalDeviceMonitor * monitor,
|
||||
GstDeviceMonitorFactoryListType type);
|
||||
|
||||
GstDeviceMonitorFactoryListType gst_global_device_monitor_get_type_filter (
|
||||
GstGlobalDeviceMonitor * monitor);
|
||||
|
||||
|
||||
void gst_global_device_monitor_set_caps_filter (
|
||||
GstGlobalDeviceMonitor * monitor,
|
||||
GstCaps * caps);
|
||||
|
||||
GstCaps * gst_global_device_monitor_get_caps_filter (
|
||||
GstGlobalDeviceMonitor * monitor);
|
||||
|
||||
GstBus * gst_global_device_monitor_get_bus (
|
||||
GstGlobalDeviceMonitor * monitor);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif /* __GST_GLOBAL_DEVICE_MONITOR_H__ */
|
||||
|
|
@ -581,6 +581,16 @@ EXPORTS
|
|||
gst_ghost_pad_new_no_target
|
||||
gst_ghost_pad_new_no_target_from_template
|
||||
gst_ghost_pad_set_target
|
||||
gst_global_device_monitor_get_bus
|
||||
gst_global_device_monitor_get_caps_filter
|
||||
gst_global_device_monitor_get_devices
|
||||
gst_global_device_monitor_get_type
|
||||
gst_global_device_monitor_get_type_filter
|
||||
gst_global_device_monitor_new
|
||||
gst_global_device_monitor_set_caps_filter
|
||||
gst_global_device_monitor_set_type_filter
|
||||
gst_global_device_monitor_start
|
||||
gst_global_device_monitor_stop
|
||||
gst_init
|
||||
gst_init_check
|
||||
gst_init_get_option_group
|
||||
|
|
|
|||
Loading…
Reference in a new issue