Commit 448d180c authored by Olivier Crête's avatar Olivier Crête 👻 Committed by Tim-Philipp Müller

globaldevicemonitor: Add device monitor aggregator

https://bugzilla.gnome.org/show_bug.cgi?id=678402
parent 1b7c5c4d
......@@ -80,6 +80,7 @@ libgstreamer_@GST_API_VERSION@_la_SOURCES = \
gstevent.c \
gstformat.c \
gstghostpad.c \
gstglobaldevicemonitor.c \
gstinfo.c \
gstiterator.c \
gstatomicqueue.c \
......@@ -183,6 +184,7 @@ gst_headers = \
gstevent.h \
gstformat.h \
gstghostpad.h \
gstglobaldevicemonitor.h \
gstinfo.h \
gstiterator.h \
gstatomicqueue.h \
......
......@@ -49,6 +49,7 @@
#include <gst/gsterror.h>
#include <gst/gstevent.h>
#include <gst/gstghostpad.h>
#include <gst/gstglobaldevicemonitor.h>
#include <gst/gstinfo.h>
#include <gst/gstiterator.h>
#include <gst/gstmessage.h>
......
/* GStreamer
* Copyright (C) 2013 Olivier Crete <olivier.crete@collabora.com>
*
* gstglobaldevicemonitor.c: Global device monitor
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gstglobaldevicemonitor.h>
#include "gst/gst_private.h"
#include <gst/gst.h>
struct _GstGlobalDeviceMonitorPrivate
{
gboolean started;
GstBus *bus;
GPtrArray *monitors;
guint cookie;
GstCaps *caps;
GstDeviceMonitorFactoryListType type;
};
G_DEFINE_TYPE (GstGlobalDeviceMonitor, gst_global_device_monitor,
GST_TYPE_OBJECT);
static void gst_global_device_monitor_dispose (GObject * object);
static void
gst_global_device_monitor_class_init (GstGlobalDeviceMonitorClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
g_type_class_add_private (klass, sizeof (GstGlobalDeviceMonitorPrivate));
object_class->dispose = gst_global_device_monitor_dispose;
}
static void
bus_sync_message (GstBus * bus, GstMessage * message,
GstGlobalDeviceMonitor * monitor)
{
if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_EXTENDED &&
(gst_message_get_extended_type (message) == GST_MESSAGE_DEVICE_ADDED ||
gst_message_get_extended_type (message) ==
GST_MESSAGE_DEVICE_REMOVED)) {
gboolean intersects;
GstCaps *caps;
GstDevice *device;
if (gst_message_get_extended_type (message) == GST_MESSAGE_DEVICE_ADDED)
gst_message_parse_device_added (message, &device);
else
gst_message_parse_device_removed (message, &device);
GST_OBJECT_LOCK (monitor);
caps = gst_device_get_caps (device);
intersects = gst_caps_can_intersect (monitor->priv->caps, caps);
gst_caps_unref (caps);
GST_OBJECT_UNLOCK (monitor);
if (intersects)
gst_bus_post (monitor->priv->bus, gst_message_ref (message));
}
}
static void
gst_global_device_monitor_init (GstGlobalDeviceMonitor * self)
{
GList *factories;
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GST_TYPE_GLOBAL_DEVICE_MONITOR, GstGlobalDeviceMonitorPrivate);
self->priv->bus = gst_bus_new ();
gst_bus_set_flushing (self->priv->bus, TRUE);
self->priv->monitors = g_ptr_array_new ();
self->priv->caps = gst_caps_new_any ();
self->priv->type = GST_DEVICE_MONITOR_FACTORY_TYPE_SINK |
GST_DEVICE_MONITOR_FACTORY_TYPE_SRC;
factories =
gst_device_monitor_factory_list_get_device_monitors (self->priv->type, 1);
while (factories) {
GstDeviceMonitorFactory *factory = factories->data;
GstDeviceMonitor *monitor;
factories = g_list_remove (factories, factory);
monitor = gst_device_monitor_factory_get (factory);
if (monitor) {
GstBus *bus = gst_device_monitor_get_bus (monitor);
gst_bus_enable_sync_message_emission (bus);
g_signal_connect (monitor, "sync-message::extended",
G_CALLBACK (bus_sync_message), self);
g_ptr_array_add (self->priv->monitors, monitor);
}
gst_object_unref (factory);
}
}
static void
gst_global_device_monitor_remove (GstGlobalDeviceMonitor * self, guint i)
{
GstDeviceMonitor *monitor = g_ptr_array_index (self->priv->monitors, i);
GstBus *bus;
g_ptr_array_remove_index_fast (self->priv->monitors, i);
bus = gst_device_monitor_get_bus (monitor);
g_signal_handlers_disconnect_by_func (bus, bus_sync_message, self);
gst_object_unref (bus);
gst_object_unref (monitor);
}
static void
gst_global_device_monitor_dispose (GObject * object)
{
GstGlobalDeviceMonitor *self = GST_GLOBAL_DEVICE_MONITOR (object);
g_return_if_fail (self->priv->started == FALSE);
if (self->priv->monitors) {
while (self->priv->monitors->len)
gst_global_device_monitor_remove (self, self->priv->monitors->len - 1);
g_ptr_array_unref (self->priv->monitors);
self->priv->monitors = NULL;
}
gst_caps_replace (&self->priv->caps, NULL);
gst_object_replace ((GstObject **) & self->priv->bus, NULL);
G_OBJECT_CLASS (gst_global_device_monitor_parent_class)->dispose (object);
}
/**
* gst_global_device_monitor_get_devices:
* @monitor: A #GstDeviceMonitor
*
* Gets a list of devices from all of the relevant monitors. This may actually
* probe the hardware if the global monitor is not currently started.
*
* Returns: (transfer full) (element-type GstDevice): a #GList of
* #GstDevice
*/
GList *
gst_global_device_monitor_get_devices (GstGlobalDeviceMonitor * self)
{
GList *devices = NULL;
guint i;
guint cookie;
g_return_val_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self), NULL);
GST_OBJECT_LOCK (self);
again:
g_list_free_full (devices, gst_object_unref);
devices = NULL;
cookie = self->priv->cookie;
for (i = 0; i < self->priv->monitors->len; i++) {
GList *tmpdev;
GstDeviceMonitor *monitor =
gst_object_ref (g_ptr_array_index (self->priv->monitors, i));
GList *item;
GST_OBJECT_UNLOCK (self);
tmpdev = gst_device_monitor_get_devices (monitor);
for (item = tmpdev; item; item = item->next) {
GstDevice *dev = GST_DEVICE (item->data);
GstCaps *caps = gst_device_get_caps (dev);
if (gst_caps_can_intersect (self->priv->caps, caps))
devices = g_list_prepend (devices, gst_object_ref (dev));
gst_caps_unref (caps);
}
g_list_free_full (tmpdev, gst_object_unref);
gst_object_unref (monitor);
GST_OBJECT_LOCK (self);
if (self->priv->cookie != cookie)
goto again;
}
GST_OBJECT_UNLOCK (self);
return devices;
}
/**
* gst_global_device_monitor_start:
* @monitor: A #GstGlobalDeviceMonitor
*
* Starts monitoring the devices, one this has succeeded, the
* #GstGlobalDeviceMonitor:added and #GstGlobalDeviceMonitor:removed
* signals will be emitted when the list of devices changes.
*
* Returns: %TRUE if the device monitoring could be started
*/
gboolean
gst_global_device_monitor_start (GstGlobalDeviceMonitor * self)
{
guint i;
g_return_val_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self), FALSE);
GST_OBJECT_LOCK (self);
if (self->priv->monitors->len == 0) {
GST_OBJECT_UNLOCK (self);
return FALSE;
}
gst_bus_set_flushing (self->priv->bus, FALSE);
for (i = 0; i < self->priv->monitors->len; i++) {
if (!gst_device_monitor_start (g_ptr_array_index (self->priv->monitors, i))) {
gst_bus_set_flushing (self->priv->bus, TRUE);
for (; i != 0; i--)
gst_device_monitor_stop (g_ptr_array_index (self->priv->monitors,
i - 1));
GST_OBJECT_UNLOCK (self);
return FALSE;
}
}
self->priv->started = TRUE;
GST_OBJECT_UNLOCK (self);
return TRUE;
}
/**
* gst_global_device_monitor_stop:
* @monitor: A #GstDeviceMonitor
*
* Stops monitoring the devices.
*/
void
gst_global_device_monitor_stop (GstGlobalDeviceMonitor * self)
{
guint i;
g_return_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self));
gst_bus_set_flushing (self->priv->bus, TRUE);
GST_OBJECT_LOCK (self);
for (i = 0; i < self->priv->monitors->len; i++)
gst_device_monitor_stop (g_ptr_array_index (self->priv->monitors, i));
self->priv->started = FALSE;
GST_OBJECT_UNLOCK (self);
}
void
gst_global_device_monitor_set_type_filter (GstGlobalDeviceMonitor * self,
GstDeviceMonitorFactoryListType type)
{
GList *factories = NULL;
guint i;
g_return_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self));
g_return_if_fail (!self->priv->started);
g_return_if_fail (type &
(GST_DEVICE_MONITOR_FACTORY_TYPE_SINK |
GST_DEVICE_MONITOR_FACTORY_TYPE_SRC));
GST_OBJECT_LOCK (self);
if (self->priv->type == type) {
GST_OBJECT_UNLOCK (self);
return;
}
self->priv->type = type;
factories =
gst_device_monitor_factory_list_get_device_monitors (self->priv->type, 1);
for (i = 0; i < self->priv->monitors->len; i++) {
GstDeviceMonitor *monitor = g_ptr_array_index (self->priv->monitors, i);
GstDeviceMonitorFactory *f = gst_device_monitor_get_factory (monitor);
GList *item;
item = g_list_find (factories, f);
if (item) {
/* If the item is in our list, then remove it from the list of factories,
* we don't have it to re-create it later
*/
factories = g_list_remove_link (factories, item);
gst_object_unref (f);
} else {
/* If it's not in our list, them remove it from the list of monitors.
*/
self->priv->cookie++;
gst_global_device_monitor_remove (self, i);
i--;
}
}
while (factories) {
GstDeviceMonitorFactory *factory = factories->data;
GstDeviceMonitor *monitor;
factories = g_list_remove (factories, factory);
monitor = gst_device_monitor_factory_get (factory);
if (monitor) {
GstBus *bus = gst_device_monitor_get_bus (monitor);
gst_bus_enable_sync_message_emission (bus);
g_signal_connect (bus, "sync-message::extended",
G_CALLBACK (bus_sync_message), self);
gst_object_unref (bus);
g_ptr_array_add (self->priv->monitors, monitor);
self->priv->cookie++;
}
gst_object_unref (factory);
}
GST_OBJECT_UNLOCK (self);
}
GstDeviceMonitorFactoryListType
gst_global_device_monitor_get_type_filter (GstGlobalDeviceMonitor * self)
{
GstDeviceMonitorFactoryListType res;
g_return_val_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self), 0);
GST_OBJECT_LOCK (self);
res = self->priv->type;
GST_OBJECT_UNLOCK (self);
return res;
}
void
gst_global_device_monitor_set_caps_filter (GstGlobalDeviceMonitor * self,
GstCaps * caps)
{
g_return_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self));
g_return_if_fail (GST_IS_CAPS (caps));
GST_OBJECT_LOCK (self);
gst_caps_replace (&self->priv->caps, caps);
GST_OBJECT_UNLOCK (self);
}
GstCaps *
gst_global_device_monitor_get_caps_filter (GstGlobalDeviceMonitor * self)
{
GstCaps *res;
g_return_val_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (self), NULL);
GST_OBJECT_LOCK (self);
res = gst_caps_ref (self->priv->caps);
GST_OBJECT_UNLOCK (self);
return res;
}
GstGlobalDeviceMonitor *
gst_global_device_monitor_new (void)
{
return g_object_new (GST_TYPE_GLOBAL_DEVICE_MONITOR, NULL);
}
/**
* gst_global_device_monitor_get_bus:
* @monitor: a #GstDeviceMonitor
*
* Gets the #GstBus of this #GstGlobalDeviceMonitor
*
* Returns: (transfer full): a #GstBus
*/
GstBus *
gst_global_device_monitor_get_bus (GstGlobalDeviceMonitor * monitor)
{
g_return_val_if_fail (GST_IS_GLOBAL_DEVICE_MONITOR (monitor), NULL);
return gst_object_ref (monitor->priv->bus);
}
/* GStreamer
* Copyright (C) 2013 Olivier Crete <olivier.crete@collabora.com>
*
* gstglobaldevicemonitor.c: Global device monitor
*
* 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_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
......
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