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devicemonitor: Add GstDeviceMonitor and related

Browse source 
Also add GstDevice and GstDeviceMonitorFactory
And add code to the registry to save them

https://bugzilla.gnome.org/show_bug.cgi?id=678402
This commit is contained in:
Olivier Crête 2012-10-16 12:27:04 -04:00 committed by Tim-Philipp Müller
parent 10d53423b5
commit e4e85fc88a
18 changed files with 1978 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
gst/Makefile.am
View file

@ -71,6 +71,9 @@ libgstreamer_@GST_API_VERSION@_la_SOURCES = \
gstcontrolsource.c \
gstdatetime.c \
gstdebugutils.c \
gstdevice.c \
gstdevicemonitor.c \
gstdevicemonitorfactory.c \
gstelement.c \
gstelementfactory.c \
gsterror.c \
@ -172,6 +175,9 @@ gst_headers = \
gstdebugutils.h \
gstelement.h \
gstelementmetadata.h \
gstdevice.h \
gstdevicemonitor.h \
gstdevicemonitorfactory.h \
gstelementfactory.h \
gsterror.h \
gstevent.h \

2
gst/gst.h
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@ -42,6 +42,8 @@
#include <gst/gstcontrolsource.h>
#include <gst/gstdatetime.h>
#include <gst/gstdebugutils.h>
#include <gst/gstdevice.h>
#include <gst/gstdevicemonitor.h>
#include <gst/gstelement.h>
#include <gst/gstelementmetadata.h>
#include <gst/gsterror.h>

22
gst/gst_private.h
View file

@ -54,6 +54,9 @@ extern const char g_log_domain_gstreamer[];
/* for GstElement */
#include "gstelement.h"
/* for GstDeviceMonitor */
#include "gstdevicemonitor.h"
/* for GstToc */
#include "gsttoc.h"
@ -393,5 +396,24 @@ struct _GstElementFactoryClass {
gpointer _gst_reserved[GST_PADDING];
};
struct _GstDeviceMonitorFactory {
GstPluginFeature feature;
/* <private> */
GType type; /* unique GType the device factory or 0 if not loaded */
volatile GstDeviceMonitor *monitor;
gpointer metadata;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstDeviceMonitorFactoryClass {
GstPluginFeatureClass parent;
/* <private> */
gpointer _gst_reserved[GST_PADDING];
};
G_END_DECLS
#endif /* __GST_PRIVATE_H__ */

231
gst/gstdevice.c Normal file
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@ -0,0 +1,231 @@
/* GStreamer
* Copyright (C) 2012 Olivier Crete <olivier.crete@collabora.com>
*
* gstdevice.c: Device discovery
*
* 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/gst_private.h"
#include <gst/gstdevice.h>
#include <gst/gst.h>
enum
{
PROP_DISPLAY_NAME = 1,
PROP_CAPS
};
enum
{
REMOVED,
LAST_SIGNAL
};
struct _GstDevicePrivate
{
GstCaps *caps;
gchar *display_name;
};
static guint signals[LAST_SIGNAL];
G_DEFINE_ABSTRACT_TYPE (GstDevice, gst_device, GST_TYPE_OBJECT);
static void gst_device_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec);
static void gst_device_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec);
static void gst_device_finalize (GObject * object);
static void
gst_device_class_init (GstDeviceClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
g_type_class_add_private (klass, sizeof (GstDevicePrivate));
object_class->get_property = gst_device_get_property;
object_class->set_property = gst_device_set_property;
object_class->finalize = gst_device_finalize;
g_object_class_install_property (object_class, PROP_DISPLAY_NAME,
g_param_spec_string ("display-name", "Display Name",
"The user-friendly name of the device", "",
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class, PROP_CAPS,
g_param_spec_boxed ("caps", "Device Caps",
"The possible caps of a device", GST_TYPE_CAPS,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
signals[REMOVED] = g_signal_new ("removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 0);
}
static void
gst_device_init (GstDevice * device)
{
device->priv = G_TYPE_INSTANCE_GET_PRIVATE (device, GST_TYPE_DEVICE,
GstDevicePrivate);
}
static void
gst_device_finalize (GObject * object)
{
GstDevice *device = GST_DEVICE (object);
gst_caps_replace (&device->priv->caps, NULL);
g_free (device->priv->display_name);
G_OBJECT_CLASS (gst_device_parent_class)->finalize (object);
}
static void
gst_device_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstDevice *gstdevice;
gstdevice = GST_DEVICE_CAST (object);
switch (prop_id) {
case PROP_DISPLAY_NAME:
g_value_take_string (value, gst_device_get_display_name (gstdevice));
break;
case PROP_CAPS:
if (gstdevice->priv->caps)
g_value_take_boxed (value, gst_device_get_caps (gstdevice));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_device_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDevice *gstdevice;
gstdevice = GST_DEVICE_CAST (object);
switch (prop_id) {
case PROP_DISPLAY_NAME:
gstdevice->priv->display_name = g_value_dup_string (value);
break;
case PROP_CAPS:
gst_caps_replace (&gstdevice->priv->caps, g_value_get_boxed (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gst_device_create_element:
* @device: a #GstDevice
* @name: (allow-none): name of new element, or NULL to automatically
* create a unique name.
*
* Returns: (transfer full): a new #GstElement configured to use this device
*
* Since: 1.4
*/
GstElement *
gst_device_create_element (GstDevice * device, const gchar * name)
{
GstDeviceClass *klass = GST_DEVICE_GET_CLASS (device);
if (klass->create_element)
return klass->create_element (device, name);
else
return NULL;
}
/**
* gst_device_get_caps:
* @device: a #GstDevice
*
* Getter for the #GstCaps that this device supports.
*
* Returns: The #GstCaps supported by this device. Unref with
* gst_caps_unref() when done.
*
* Since: 1.4
*/
GstCaps *
gst_device_get_caps (GstDevice * device)
{
if (device->priv->caps)
return gst_caps_ref (device->priv->caps);
else
return NULL;
}
/**
* gst_device_get_display_name:
* @device: a #GstDevice
*
* Gets the user-friendly name of the device.
*
* Returns: The device name. Free with g_free() after use.
*
* Since: 1.4
*/
gchar *
gst_device_get_display_name (GstDevice * device)
{
return g_strdup (device->priv->display_name);
}
/**
* gst_device_reconfigure_element:
* @device: a #GstDevice
* @element: a #GstElement
*
* Tries to reconfigure an existing element to use the device. If this
* function fails, then one must destroy the element and create a new one
* using gst_device_create_element().
*
* Note: This should only be implemented for elements can change their
* device in the PLAYING state.
*
* Returns: %TRUE if the element could be reconfigured to use this device,
* %FALSE otherwise.
*
* Since: 1.4
*/
gboolean
gst_device_reconfigure_element (GstDevice * device, GstElement * element)
{
GstDeviceClass *klass = GST_DEVICE_GET_CLASS (device);
if (klass->reconfigure_element)
return klass->reconfigure_element (device, element);
else
return FALSE;
}

76
gst/gstdevice.h Normal file
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@ -0,0 +1,76 @@
/* GStreamer
* Copyright (C) 2012 Olivier Crete <olivier.crete@collabora.com>
*
* gstdevice.c: Device discovery
*
* 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_DEVICE_H__
#define __GST_DEVICE_H__
typedef struct _GstDevice GstDevice;
typedef struct _GstDeviceClass GstDeviceClass;
#include <gst/gstelement.h>
#include <gst/gstcaps.h>
G_BEGIN_DECLS
typedef struct _GstDevicePrivate GstDevicePrivate;
#define GST_TYPE_DEVICE (gst_device_get_type())
#define GST_IS_DEVICE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DEVICE))
#define GST_IS_DEVICE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DEVICE))
#define GST_DEVICE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_DEVICE, GstDeviceClass))
#define GST_DEVICE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DEVICE, GstDevice))
#define GST_DEVICE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DEVICE, GstDeviceClass))
#define GST_DEVICE_CAST(obj) ((GstDevice *)(obj))
struct _GstDevice {
GstObject parent;
/*< private >*/
GstDevicePrivate *priv;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstDeviceClass {
GstObjectClass parent_class;
GstElement * (*create_element) (GstDevice * device, const gchar * name);
gboolean (*reconfigure_element) (GstDevice * device, GstElement * element);
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
GType gst_device_get_type (void);
GstElement * gst_device_create_element (GstDevice * device, const gchar * name);
GstCaps * gst_device_get_caps (GstDevice * device);
gchar * gst_device_get_display_name (GstDevice * device);
gboolean gst_device_reconfigure_element (GstDevice * device,
GstElement * element);
G_END_DECLS
#endif /* __GST_DEVICE_H__ */

570
gst/gstdevicemonitor.c Normal file
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@ -0,0 +1,570 @@
/* GStreamer
* Copyright (C) 2012 Olivier Crete <olivier.crete@collabora.com>
*
* gstdevicemonitor.c: Device probing and monitoring
*
* 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/gstdevicemonitor.h>
#include "gst/gst_private.h"
#include <gst/gst.h>
#include <gst/gstelementmetadata.h>
#include <gst/gstquark.h>
struct _GstDeviceMonitorPrivate
{
GstBus *bus;
GMutex start_lock;
gboolean started_count;
};
/* this is used in gstelementfactory.c:gst_element_register() */
GQuark __gst_devicemonitorclass_factory = 0;
static void gst_device_monitor_class_init (GstDeviceMonitorClass * klass);
static void gst_device_monitor_init (GstDeviceMonitor * element);
static void gst_device_monitor_base_class_init (gpointer g_class);
static void gst_device_monitor_base_class_finalize (gpointer g_class);
static void gst_device_monitor_dispose (GObject * object);
static void gst_device_monitor_finalize (GObject * object);
static gpointer gst_device_monitor_parent_class = NULL;
GType
gst_device_monitor_get_type (void)
{
static volatile gsize gst_device_monitor_type = 0;
if (g_once_init_enter (&gst_device_monitor_type)) {
GType _type;
static const GTypeInfo element_info = {
sizeof (GstDeviceMonitorClass),
gst_device_monitor_base_class_init,
gst_device_monitor_base_class_finalize,
(GClassInitFunc) gst_device_monitor_class_init,
NULL,
NULL,
sizeof (GstDeviceMonitor),
0,
(GInstanceInitFunc) gst_device_monitor_init,
NULL
};
_type = g_type_register_static (GST_TYPE_OBJECT, "GstDeviceMonitor",
&element_info, G_TYPE_FLAG_ABSTRACT);
__gst_devicemonitorclass_factory =
g_quark_from_static_string ("GST_DEVICEMONITORCLASS_FACTORY");
g_once_init_leave (&gst_device_monitor_type, _type);
}
return gst_device_monitor_type;
}
static void
gst_device_monitor_base_class_init (gpointer g_class)
{
GstDeviceMonitorClass *klass = GST_DEVICE_MONITOR_CLASS (g_class);
/* Copy the element details here so elements can inherit the
* details from their base class and classes only need to set
* the details in class_init instead of base_init */
klass->metadata =
klass->metadata ? gst_structure_copy (klass->metadata) :
gst_structure_new_empty ("metadata");
klass->factory = g_type_get_qdata (G_TYPE_FROM_CLASS (klass),
__gst_devicemonitorclass_factory);
}
static void
gst_device_monitor_base_class_finalize (gpointer g_class)
{
GstDeviceMonitorClass *klass = GST_DEVICE_MONITOR_CLASS (g_class);
gst_structure_free (klass->metadata);
}
static void
gst_device_monitor_class_init (GstDeviceMonitorClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gst_device_monitor_parent_class = g_type_class_peek_parent (klass);
g_type_class_add_private (klass, sizeof (GstDeviceMonitorPrivate));
gobject_class->dispose = gst_device_monitor_dispose;
gobject_class->finalize = gst_device_monitor_finalize;
}
static void
gst_device_monitor_init (GstDeviceMonitor * monitor)
{
monitor->priv = G_TYPE_INSTANCE_GET_PRIVATE (monitor,
GST_TYPE_DEVICE_MONITOR, GstDeviceMonitorPrivate);
g_mutex_init (&monitor->priv->start_lock);
monitor->priv->bus = gst_bus_new ();
gst_bus_set_flushing (monitor->priv->bus, TRUE);
}
static void
gst_device_monitor_dispose (GObject * object)
{
GstDeviceMonitor *monitor = GST_DEVICE_MONITOR (object);
gst_object_replace ((GstObject **) & monitor->priv->bus, NULL);
GST_OBJECT_LOCK (monitor);
g_list_free_full (monitor->devices, (GDestroyNotify) gst_object_unparent);
monitor->devices = NULL;
GST_OBJECT_UNLOCK (monitor);
G_OBJECT_CLASS (gst_device_monitor_parent_class)->dispose (object);
}
static void
gst_device_monitor_finalize (GObject * object)
{
GstDeviceMonitor *monitor = GST_DEVICE_MONITOR (object);
g_mutex_clear (&monitor->priv->start_lock);
G_OBJECT_CLASS (gst_device_monitor_parent_class)->finalize (object);
}
/**
* gst_device_monitor_class_add_metadata:
* @klass: class to set metadata for
* @key: the key to set
* @value: the value to set
*
* Set @key with @value as metadata in @klass.
*/
void
gst_device_monitor_class_add_metadata (GstDeviceMonitorClass * klass,
const gchar * key, const gchar * value)
{
g_return_if_fail (GST_IS_DEVICE_MONITOR_CLASS (klass));
g_return_if_fail (key != NULL);
g_return_if_fail (value != NULL);
gst_structure_set ((GstStructure *) klass->metadata,
key, G_TYPE_STRING, value, NULL);
}
/**
* gst_device_monitor_class_add_static_metadata:
* @klass: class to set metadata for
* @key: the key to set
* @value: the value to set
*
* Set @key with @value as metadata in @klass.
*
* Same as gst_device_monitor_class_add_metadata(), but @value must be a static string
* or an inlined string, as it will not be copied. (GStreamer plugins will
* be made resident once loaded, so this function can be used even from
* dynamically loaded plugins.)
*
* Since: 1.4
*/
void
gst_device_monitor_class_add_static_metadata (GstDeviceMonitorClass * klass,
const gchar * key, const gchar * value)
{
GValue val = G_VALUE_INIT;
g_return_if_fail (GST_IS_DEVICE_MONITOR_CLASS (klass));
g_return_if_fail (key != NULL);
g_return_if_fail (value != NULL);
g_value_init (&val, G_TYPE_STRING);
g_value_set_static_string (&val, value);
gst_structure_take_value ((GstStructure *) klass->metadata, key, &val);
}
/**
* gst_device_monitor_class_set_metadata:
* @klass: class to set metadata for
* @longname: The long English name of the device monitor. E.g. "File Sink"
* @classification: String describing the type of device monitor, as an unordered list
* separated with slashes ('/'). See draft-klass.txt of the design docs
* for more details and common types. E.g: "Sink/File"
* @description: Sentence describing the purpose of the device monitor.
* E.g: "Write stream to a file"
* @author: Name and contact details of the author(s). Use \n to separate
* multiple author metadata. E.g: "Joe Bloggs &lt;joe.blogs at foo.com&gt;"
*
* Sets the detailed information for a #GstDeviceMonitorClass.
* <note>This function is for use in _class_init functions only.</note>
*
* Since: 1.4
*/
void
gst_device_monitor_class_set_metadata (GstDeviceMonitorClass * klass,
const gchar * longname, const gchar * classification,
const gchar * description, const gchar * author)
{
g_return_if_fail (GST_IS_DEVICE_MONITOR_CLASS (klass));
g_return_if_fail (longname != NULL && *longname != '\0');
g_return_if_fail (classification != NULL && *classification != '\0');
g_return_if_fail (description != NULL && *description != '\0');
g_return_if_fail (author != NULL && *author != '\0');
gst_structure_id_set ((GstStructure *) klass->metadata,
GST_QUARK (ELEMENT_METADATA_LONGNAME), G_TYPE_STRING, longname,
GST_QUARK (ELEMENT_METADATA_KLASS), G_TYPE_STRING, classification,
GST_QUARK (ELEMENT_METADATA_DESCRIPTION), G_TYPE_STRING, description,
GST_QUARK (ELEMENT_METADATA_AUTHOR), G_TYPE_STRING, author, NULL);
}
/**
* gst_device_monitor_class_set_static_metadata:
* @klass: class to set metadata for
* @longname: The long English name of the element. E.g. "File Sink"
* @classification: String describing the type of element, as an unordered list
* separated with slashes ('/'). See draft-klass.txt of the design docs
* for more details and common types. E.g: "Sink/File"
* @description: Sentence describing the purpose of the element.
* E.g: "Write stream to a file"
* @author: Name and contact details of the author(s). Use \n to separate
* multiple author metadata. E.g: "Joe Bloggs &lt;joe.blogs at foo.com&gt;"
*
* Sets the detailed information for a #GstDeviceMonitorClass.
* <note>This function is for use in _class_init functions only.</note>
*
* Same as gst_device_monitor_class_set_metadata(), but @longname, @classification,
* @description, and @author must be static strings or inlined strings, as
* they will not be copied. (GStreamer plugins will be made resident once
* loaded, so this function can be used even from dynamically loaded plugins.)
*
* Since: 1.4
*/
void
gst_device_monitor_class_set_static_metadata (GstDeviceMonitorClass * klass,
const gchar * longname, const gchar * classification,
const gchar * description, const gchar * author)
{
GstStructure *s = (GstStructure *) klass->metadata;
GValue val = G_VALUE_INIT;
g_return_if_fail (GST_IS_DEVICE_MONITOR_CLASS (klass));
g_return_if_fail (longname != NULL && *longname != '\0');
g_return_if_fail (classification != NULL && *classification != '\0');
g_return_if_fail (description != NULL && *description != '\0');
g_return_if_fail (author != NULL && *author != '\0');
g_value_init (&val, G_TYPE_STRING);
g_value_set_static_string (&val, longname);
gst_structure_id_set_value (s, GST_QUARK (ELEMENT_METADATA_LONGNAME), &val);
g_value_set_static_string (&val, classification);
gst_structure_id_set_value (s, GST_QUARK (ELEMENT_METADATA_KLASS), &val);
g_value_set_static_string (&val, description);
gst_structure_id_set_value (s, GST_QUARK (ELEMENT_METADATA_DESCRIPTION),
&val);
g_value_set_static_string (&val, author);
gst_structure_id_take_value (s, GST_QUARK (ELEMENT_METADATA_AUTHOR), &val);
}
/**
* gst_device_monitor_class_get_metadata:
* @klass: class to get metadata for
* @key: the key to get
*
* Get metadata with @key in @klass.
*
* Returns: the metadata for @key.
*
* Since: 1.4
*/
const gchar *
gst_device_monitor_class_get_metadata (GstDeviceMonitorClass * klass,
const gchar * key)
{
g_return_val_if_fail (GST_IS_DEVICE_MONITOR_CLASS (klass), NULL);
g_return_val_if_fail (key != NULL, NULL);
return gst_structure_get_string ((GstStructure *) klass->metadata, key);
}
/**
* gst_device_monitor_get_devices:
* @monitor: A #GstDeviceMonitor
*
* Gets a list of devices that this monitor understands. This may actually
* probe the hardware if the monitor is not currently started.
*
* Returns: (transfer full) (element-type GstDevice): a #GList of
* #GstDevice
*
* Since: 1.4
*/
GList *
gst_device_monitor_get_devices (GstDeviceMonitor * monitor)
{
GstDeviceMonitorClass *klass;
GList *devices = NULL;
gboolean started;
GList *item;
g_return_val_if_fail (GST_IS_DEVICE_MONITOR (monitor), NULL);
klass = GST_DEVICE_MONITOR_GET_CLASS (monitor);
g_mutex_lock (&monitor->priv->start_lock);
started = (monitor->priv->started_count > 0);
if (started) {
GST_OBJECT_LOCK (monitor);
for (item = monitor->devices; item; item = item->next)
devices = g_list_prepend (devices, gst_object_ref (item->data));
GST_OBJECT_UNLOCK (monitor);
} else if (klass->probe)
devices = klass->probe (monitor);
g_mutex_unlock (&monitor->priv->start_lock);
return devices;
}
/**
* gst_device_monitor_start:
* @monitor: A #GstDeviceMonitor
*
* Starts monitoring the devices. This will cause #GST_MESSAGE_DEVICE messages
* to be posted on the monitor's bus when devices are added or removed from
* the system.
*
* Since the #GstDeviceMonitor is a singleton,
* gst_device_monitor_start() may already have been called by another
* user of the object, gst_device_monitor_stop() needs to be called the same
* number of times.
*
* Returns: %TRUE if the device monitoring could be started
*
* Since: 1.4
*/
gboolean
gst_device_monitor_start (GstDeviceMonitor * monitor)
{
GstDeviceMonitorClass *klass;
gboolean ret = FALSE;
g_return_val_if_fail (GST_IS_DEVICE_MONITOR (monitor), FALSE);
klass = GST_DEVICE_MONITOR_GET_CLASS (monitor);
g_mutex_lock (&monitor->priv->start_lock);
if (monitor->priv->started_count > 0) {
ret = TRUE;
goto started;
}
if (klass->start)
ret = klass->start (monitor);
if (ret) {
monitor->priv->started_count++;
gst_bus_set_flushing (monitor->priv->bus, FALSE);
}
started:
g_mutex_unlock (&monitor->priv->start_lock);
return ret;
}
/**
* gst_device_monitor_stop:
* @monitor: A #GstDeviceMonitor
*
* Decreases the use-count by one. If the use count reaches zero, this
* #GstDeviceMonitor will stop monitoring the devices. This needs to be
* called the same number of times that gst_device_monitor_start() was called.
*
* Since: 1.4
*/
void
gst_device_monitor_stop (GstDeviceMonitor * monitor)
{
GstDeviceMonitorClass *klass;
g_return_if_fail (GST_IS_DEVICE_MONITOR (monitor));
klass = GST_DEVICE_MONITOR_GET_CLASS (monitor);
g_mutex_lock (&monitor->priv->start_lock);
if (monitor->priv->started_count == 1) {
gst_bus_set_flushing (monitor->priv->bus, TRUE);
if (klass->stop)
klass->stop (monitor);
GST_OBJECT_LOCK (monitor);
g_list_free_full (monitor->devices, (GDestroyNotify) gst_object_unparent);
monitor->devices = NULL;
GST_OBJECT_UNLOCK (monitor);
} else if (monitor->priv->started_count < 1) {
g_critical ("Trying to stop a GstDeviceMonitor %s which is already stopped",
GST_OBJECT_NAME (monitor));
}
monitor->priv->started_count--;
g_mutex_unlock (&monitor->priv->start_lock);
}
/**
* gst_device_monitor_get_factory:
* @monitor: a #GstDeviceMonitor to request the device monitor factory of.
*
* Retrieves the factory that was used to create this device monitor.
*
* Returns: (transfer none): the #GstDeviceMonitorFactory used for creating this
* device monitor. no refcounting is needed.
*
* Since: 1.4
*/
GstDeviceMonitorFactory *
gst_device_monitor_get_factory (GstDeviceMonitor * monitor)
{
g_return_val_if_fail (GST_IS_DEVICE_MONITOR (monitor), NULL);
return GST_DEVICE_MONITOR_GET_CLASS (monitor)->factory;
}
/**
* gst_device_monitor_can_monitor:
* @monitor: a #GstDeviceMonitor
*
* If this function returns %TRUE, then the device monitor can monitor if
* devices are added or removed. Otherwise, it can only do static probing.
*
* Returns: %TRUE if the #GstDeviceMonitor support monitoring, %FALSE otherwise
*/
gboolean
gst_device_monitor_can_monitor (GstDeviceMonitor * monitor)
{
GstDeviceMonitorClass *klass;
g_return_val_if_fail (GST_IS_DEVICE_MONITOR (monitor), FALSE);
klass = GST_DEVICE_MONITOR_GET_CLASS (monitor);
if (klass->start)
return TRUE;
else
return FALSE;
}
/**
* gst_device_monitor_get_bus:
* @monitor: a #GstDeviceMonitor
*
* Gets the #GstBus of this #GstDeviceMonitor
*
* Returns: (transfer full): a #GstBus
*
* Since: 1.4
*/
GstBus *
gst_device_monitor_get_bus (GstDeviceMonitor * monitor)
{
g_return_val_if_fail (GST_IS_DEVICE_MONITOR (monitor), NULL);
return gst_object_ref (monitor->priv->bus);
}
/**
* gst_device_monitor_device_add:
* @monitor: a #GstDeviceMonitor
* @device: (transfer full): a #GstDevice that has been added
*
* Posts a message on the monitor's #GstBus to inform applications that
* a new device has been added.
*
* This is for use by subclasses.
*
* Since: 1.4
*/
void
gst_device_monitor_device_add (GstDeviceMonitor * monitor, GstDevice * device)
{
GstMessage *message;
if (!gst_object_set_parent (GST_OBJECT (device), GST_OBJECT (monitor))) {
GST_WARNING_OBJECT (monitor, "Could not parent device %p to monitor,"
" it already has a parent", device);
return;
}
GST_OBJECT_LOCK (monitor);
monitor->devices = g_list_prepend (monitor->devices, gst_object_ref (device));
GST_OBJECT_UNLOCK (monitor);
message = gst_message_new_device_added (GST_OBJECT (monitor), device);
gst_bus_post (monitor->priv->bus, message);
gst_object_unref (device);
}
/**
* gst_device_monitor_device_remove:
* @monitor: a #GstDeviceMonitor
* @device: a #GstDevice that has been removed
*
* Posts a message on the monitor's #GstBus to inform applications that
* a device has been removed.
*
* This is for use by subclasses.
*
* Since: 1.4
*/
void
gst_device_monitor_device_remove (GstDeviceMonitor * monitor,
GstDevice * device)
{
GstMessage *message;
GList *item;
GST_OBJECT_LOCK (monitor);
item = g_list_find (monitor->devices, device);
if (item) {
monitor->devices = g_list_delete_link (monitor->devices, item);
}
GST_OBJECT_UNLOCK (monitor);
message = gst_message_new_device_removed (GST_OBJECT (monitor), device);
g_signal_emit_by_name (device, "removed");
gst_bus_post (monitor->priv->bus, message);
if (item)
gst_object_unparent (GST_OBJECT (device));
}

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/* GStreamer
* Copyright (C) 2012 Olivier Crete <olivier.crete@collabora.com>
*
* gstdevicemonitor.h: Device probing and monitoring
*
* 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 <gst/gstdevicemonitorfactory.h>
#ifndef __GST_DEVICE_MONITOR_H__
#define __GST_DEVICE_MONITOR_H__
#include <gst/gstelement.h>
G_BEGIN_DECLS
typedef struct _GstDeviceMonitor GstDeviceMonitor;
typedef struct _GstDeviceMonitorClass GstDeviceMonitorClass;
typedef struct _GstDeviceMonitorPrivate GstDeviceMonitorPrivate;
#define GST_TYPE_DEVICE_MONITOR (gst_device_monitor_get_type())
#define GST_IS_DEVICE_MONITOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DEVICE_MONITOR))
#define GST_IS_DEVICE_MONITOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_DEVICE_MONITOR))
#define GST_DEVICE_MONITOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_DEVICE_MONITOR, GstDeviceMonitorClass))
#define GST_DEVICE_MONITOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_DEVICE_MONITOR, GstDeviceMonitor))
#define GST_DEVICE_MONITOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_DEVICE_MONITOR, GstDeviceMonitorClass))
#define GST_DEVICE_MONITOR_CAST(obj) ((GstDeviceMonitor *)(obj))
struct _GstDeviceMonitor {
GstObject parent;
/*< private >*/
/* Protected by the Object lock */
GList *devices;
GstDeviceMonitorPrivate *priv;
gpointer _gst_reserved[GST_PADDING];
};
/**
* GstDeviceMonitorClass:
* @factory: a pointer to the #GstDeviceMonitorFactory that creates this
* monitor
* @get_devices: Returns a list of devices that are currently available.
* This should never block.
* @start: Starts monitoring for new devices.
* @stop: Stops monitoring for new devices
*
* The structure of the base #GstDeviceMonitorClass
*
* Since: 1.4
*/
struct _GstDeviceMonitorClass {
GstObjectClass parent_class;
GstDeviceMonitorFactory *factory;
GList* (*probe) (GstDeviceMonitor * monitor);
gboolean (*start) (GstDeviceMonitor * monitor);
void (*stop) (GstDeviceMonitor * monitor);
gpointer metadata;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
GType gst_device_monitor_get_type (void);
GList * gst_device_monitor_get_devices (GstDeviceMonitor * monitor);
gboolean gst_device_monitor_start (GstDeviceMonitor * monitor);
void gst_device_monitor_stop (GstDeviceMonitor * monitor);
gboolean gst_device_monitor_can_monitor (GstDeviceMonitor * monitor);
GstBus * gst_device_monitor_get_bus (GstDeviceMonitor * monitor);
void gst_device_monitor_device_add (GstDeviceMonitor * monitor,
GstDevice * device);
void gst_device_monitor_device_remove (GstDeviceMonitor * monitor,
GstDevice * device);
/* device monitor class meta data */
void gst_device_monitor_class_set_metadata (GstDeviceMonitorClass *klass,
const gchar *longname,
const gchar *classification,
const gchar *description,
const gchar *author);
void gst_device_monitor_class_set_static_metadata (GstDeviceMonitorClass *klass,
const gchar *longname,
const gchar *classification,
const gchar *description,
const gchar *author);
void gst_device_monitor_class_add_metadata (GstDeviceMonitorClass * klass,
const gchar * key, const gchar * value);
void gst_device_monitor_class_add_static_metadata (GstDeviceMonitorClass * klass,
const gchar * key, const gchar * value);
const gchar * gst_device_monitor_class_get_metadata (GstDeviceMonitorClass * klass,
const gchar * key);
/* factory management */
GstDeviceMonitorFactory * gst_device_monitor_get_factory (GstDeviceMonitor * monitor);
G_END_DECLS
#endif /* __GST_DEVICE_MONITOR_H__ */

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
*
* gstdevicemonitorfactory.c: GstDeviceMonitorFactory object, support routines
*
* 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.
*/
/**
* SECTION:gstdevicemonitorfactory
* @short_description: Create GstDeviceMonitors from a factory
* @see_also: #GstDeviceMonitor, #GstPlugin, #GstPluginFeature, #GstPadTemplate.
*
* #GstDeviceMonitorFactory is used to create instances of device monitors. A
* GstDeviceMonitorfactory can be added to a #GstPlugin as it is also a
* #GstPluginFeature.
*
* Use the gst_device_monitor_factory_find() and gst_device_monitor_factory_create()
* functions to create device monitor instances or use gst_device_monitor_factory_make() as a
* convenient shortcut.
*
* Since: 1.4
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gst_private.h"
#include "gstdevicemonitorfactory.h"
#include "gst.h"
#include "glib-compat-private.h"
GST_DEBUG_CATEGORY_STATIC (device_monitor_factory_debug);
#define GST_CAT_DEFAULT device_monitor_factory_debug
static void gst_device_monitor_factory_finalize (GObject * object);
static void gst_device_monitor_factory_cleanup (GstDeviceMonitorFactory *
factory);
/* static guint gst_device_monitor_factory_signals[LAST_SIGNAL] = { 0 }; */
/* this is defined in gstelement.c */
extern GQuark __gst_devicemonitorclass_factory;
#define _do_init \
{ \
GST_DEBUG_CATEGORY_INIT (device_monitor_factory_debug, "GST_DEVICE_MONITOR_FACTORY", \
GST_DEBUG_BOLD | GST_DEBUG_FG_WHITE | GST_DEBUG_BG_RED, \
"device monitor factories keep information about installed device monitors"); \
}
G_DEFINE_TYPE_WITH_CODE (GstDeviceMonitorFactory, gst_device_monitor_factory,
GST_TYPE_PLUGIN_FEATURE, _do_init);
static void
gst_device_monitor_factory_class_init (GstDeviceMonitorFactoryClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->finalize = gst_device_monitor_factory_finalize;
}
static void
gst_device_monitor_factory_init (GstDeviceMonitorFactory * factory)
{
}
static void
gst_device_monitor_factory_finalize (GObject * object)
{
GstDeviceMonitorFactory *factory = GST_DEVICE_MONITOR_FACTORY (object);
GstDeviceMonitor *monitor;
gst_device_monitor_factory_cleanup (factory);
monitor = g_atomic_pointer_get (&factory->monitor);
if (monitor)
gst_object_unref (monitor);
G_OBJECT_CLASS (gst_device_monitor_factory_parent_class)->finalize (object);
}
/**
* gst_device_monitor_factory_find:
* @name: name of factory to find
*
* Search for an device monitor factory of the given name. Refs the returned
* device monitor factory; caller is responsible for unreffing.
*
* Returns: (transfer full): #GstDeviceMonitorFactory if found, NULL otherwise
*
* Since: 1.4
*/
GstDeviceMonitorFactory *
gst_device_monitor_factory_find (const gchar * name)
{
GstPluginFeature *feature;
g_return_val_if_fail (name != NULL, NULL);
feature = gst_registry_find_feature (gst_registry_get (), name,
GST_TYPE_DEVICE_MONITOR_FACTORY);
if (feature)
return GST_DEVICE_MONITOR_FACTORY (feature);
/* this isn't an error, for instance when you query if an device monitor factory is
* present */
GST_LOG ("no such device monitor factory \"%s\"", name);
return NULL;
}
static void
gst_device_monitor_factory_cleanup (GstDeviceMonitorFactory * factory)
{
if (factory->metadata) {
gst_structure_free ((GstStructure *) factory->metadata);
factory->metadata = NULL;
}
if (factory->type) {
factory->type = G_TYPE_INVALID;
}
}
#define CHECK_METADATA_FIELD(klass, name, key) \
G_STMT_START { \
const gchar *metafield = gst_device_monitor_class_get_metadata (klass, key); \
if (G_UNLIKELY (metafield == NULL || *metafield == '\0')) { \
g_warning ("Device monitor factory metadata for '%s' has no valid %s field", name, key); \
goto detailserror; \
} \
} G_STMT_END;
/**
* gst_device_monitor_register:
* @plugin: (allow-none): #GstPlugin to register the device monitor with, or NULL for
* a static device monitor.
* @name: name of device monitors of this type
* @rank: rank of device monitor (higher rank means more importance when autoplugging)
* @type: GType of device monitor to register
*
* Create a new device monitorfactory capable of instantiating objects of the
* @type and add the factory to @plugin.
*
* Returns: TRUE, if the registering succeeded, FALSE on error
*
* Since: 1.4
*/
gboolean
gst_device_monitor_register (GstPlugin * plugin, const gchar * name, guint rank,
GType type)
{
GstPluginFeature *existing_feature;
GstRegistry *registry;
GstDeviceMonitorFactory *factory;
GstDeviceMonitorClass *klass;
g_return_val_if_fail (name != NULL, FALSE);
g_return_val_if_fail (g_type_is_a (type, GST_TYPE_DEVICE_MONITOR), FALSE);
registry = gst_registry_get ();
/* check if feature already exists, if it exists there is no need to update it
* when the registry is getting updated, outdated plugins and all their
* features are removed and readded.
*/
existing_feature = gst_registry_lookup_feature (registry, name);
if (existing_feature) {
GST_DEBUG_OBJECT (registry, "update existing feature %p (%s)",
existing_feature, name);
factory = GST_DEVICE_MONITOR_FACTORY_CAST (existing_feature);
factory->type = type;
existing_feature->loaded = TRUE;
g_type_set_qdata (type, __gst_devicemonitorclass_factory, factory);
gst_object_unref (existing_feature);
return TRUE;
}
factory =
GST_DEVICE_MONITOR_FACTORY_CAST (g_object_newv
(GST_TYPE_DEVICE_MONITOR_FACTORY, 0, NULL));
gst_plugin_feature_set_name (GST_PLUGIN_FEATURE_CAST (factory), name);
GST_LOG_OBJECT (factory, "Created new device monitorfactory for type %s",
g_type_name (type));
/* provide info needed during class structure setup */
g_type_set_qdata (type, __gst_devicemonitorclass_factory, factory);
klass = GST_DEVICE_MONITOR_CLASS (g_type_class_ref (type));
CHECK_METADATA_FIELD (klass, name, GST_ELEMENT_METADATA_LONGNAME);
CHECK_METADATA_FIELD (klass, name, GST_ELEMENT_METADATA_KLASS);
CHECK_METADATA_FIELD (klass, name, GST_ELEMENT_METADATA_DESCRIPTION);
CHECK_METADATA_FIELD (klass, name, GST_ELEMENT_METADATA_AUTHOR);
factory->type = type;
factory->metadata = gst_structure_copy ((GstStructure *) klass->metadata);
if (plugin && plugin->desc.name) {
GST_PLUGIN_FEATURE_CAST (factory)->plugin_name = plugin->desc.name;
GST_PLUGIN_FEATURE_CAST (factory)->plugin = plugin;
g_object_add_weak_pointer ((GObject *) plugin,
(gpointer *) & GST_PLUGIN_FEATURE_CAST (factory)->plugin);
} else {
GST_PLUGIN_FEATURE_CAST (factory)->plugin_name = "NULL";
GST_PLUGIN_FEATURE_CAST (factory)->plugin = NULL;
}
gst_plugin_feature_set_rank (GST_PLUGIN_FEATURE_CAST (factory), rank);
GST_PLUGIN_FEATURE_CAST (factory)->loaded = TRUE;
gst_registry_add_feature (registry, GST_PLUGIN_FEATURE_CAST (factory));
return TRUE;
/* ERRORS */
detailserror:
{
gst_device_monitor_factory_cleanup (factory);
return FALSE;
}
}
/**
* gst_device_monitor_factory_get:
* @factory: factory to instantiate
*
* Returns the device monitor of the type defined by the given device
* monitorfactory.
*
* Returns: (transfer full): the #GstDeviceMonitor or NULL if the
* device monitor couldn't be created
*
* Since: 1.4
*/
GstDeviceMonitor *
gst_device_monitor_factory_get (GstDeviceMonitorFactory * factory)
{
GstDeviceMonitor *device_monitor;
GstDeviceMonitorClass *oclass;
GstDeviceMonitorFactory *newfactory;
g_return_val_if_fail (factory != NULL, NULL);
newfactory =
GST_DEVICE_MONITOR_FACTORY (gst_plugin_feature_load (GST_PLUGIN_FEATURE
(factory)));
if (newfactory == NULL)
goto load_failed;
factory = newfactory;
GST_INFO ("getting device monitor \"%s\"", GST_OBJECT_NAME (factory));
if (factory->type == 0)
goto no_type;
device_monitor = g_atomic_pointer_get (&newfactory->monitor);
if (device_monitor)
return gst_object_ref (device_monitor);
/* create an instance of the device monitor, cast so we don't assert on NULL
* also set name as early as we can
*/
device_monitor = GST_DEVICE_MONITOR_CAST (g_object_newv (factory->type, 0,
NULL));
if (G_UNLIKELY (device_monitor == NULL))
goto no_device_monitor;
/* fill in the pointer to the factory in the device monitor class. The
* class will not be unreffed currently.
* Be thread safe as there might be 2 threads creating the first instance of
* an device monitor at the same moment
*/
oclass = GST_DEVICE_MONITOR_GET_CLASS (device_monitor);
if (!g_atomic_pointer_compare_and_exchange (&oclass->factory, NULL, factory))
gst_object_unref (factory);
gst_object_ref_sink (device_monitor);
/* We use an atomic to make sure we don't create two in parallel */
if (!g_atomic_pointer_compare_and_exchange (&newfactory->monitor, NULL,
device_monitor)) {
gst_object_unref (device_monitor);
device_monitor = g_atomic_pointer_get (&newfactory->monitor);
}
GST_DEBUG ("created device monitor \"%s\"", GST_OBJECT_NAME (factory));
return gst_object_ref (device_monitor);
/* ERRORS */
load_failed:
{
GST_WARNING_OBJECT (factory,
"loading plugin containing feature %s returned NULL!",
GST_OBJECT_NAME (factory));
return NULL;
}
no_type:
{
GST_WARNING_OBJECT (factory, "factory has no type");
gst_object_unref (factory);
return NULL;
}
no_device_monitor:
{
GST_WARNING_OBJECT (factory, "could not create device monitor");
gst_object_unref (factory);
return NULL;
}
}
/**
* gst_device_monitor_factory_get_by_name:
* @factoryname: a named factory to instantiate
*
* Returns the device monitor of the type defined by the given device
* monitor factory.
*
* Returns: (transfer full): a #GstDeviceMonitor or NULL if unable to
* create device monitor
*
* Since: 1.4
*/
GstDeviceMonitor *
gst_device_monitor_factory_get_by_name (const gchar * factoryname)
{
GstDeviceMonitorFactory *factory;
GstDeviceMonitor *device_monitor;
g_return_val_if_fail (factoryname != NULL, NULL);
g_return_val_if_fail (gst_is_initialized (), NULL);
GST_LOG ("gstdevicemonitorfactory: get_by_name \"%s\"", factoryname);
factory = gst_device_monitor_factory_find (factoryname);
if (factory == NULL)
goto no_factory;
GST_LOG_OBJECT (factory, "found factory %p", factory);
device_monitor = gst_device_monitor_factory_get (factory);
if (device_monitor == NULL)
goto create_failed;
gst_object_unref (factory);
return device_monitor;
/* ERRORS */
no_factory:
{
GST_INFO ("no such device monitor factory \"%s\"!", factoryname);
return NULL;
}
create_failed:
{
GST_INFO_OBJECT (factory, "couldn't create instance!");
gst_object_unref (factory);
return NULL;
}
}
/**
* gst_device_monitor_factory_get_device_monitor_type:
* @factory: factory to get managed #GType from
*
* Get the #GType for device monitors managed by this factory. The type can
* only be retrieved if the device monitor factory is loaded, which can be
* assured with gst_plugin_feature_load().
*
* Returns: the #GType for device monitors managed by this factory or 0 if
* the factory is not loaded.
*
* Since: 1.4
*/
GType
gst_device_monitor_factory_get_device_monitor_type (GstDeviceMonitorFactory *
factory)
{
g_return_val_if_fail (GST_IS_DEVICE_MONITOR_FACTORY (factory), 0);
return factory->type;
}
/**
* gst_device_monitor_factory_get_metadata:
* @factory: a #GstDeviceMonitorFactory
* @key: a key
*
* Get the metadata on @factory with @key.
*
* Returns: the metadata with @key on @factory or %NULL when there was no
* metadata with the given @key.
*
* Since: 1.4
*/
const gchar *
gst_device_monitor_factory_get_metadata (GstDeviceMonitorFactory * factory,
const gchar * key)
{
return gst_structure_get_string ((GstStructure *) factory->metadata, key);
}
/**
* gst_device_monitor_factory_get_metadata_keys:
* @factory: a #GstDeviceMonitorFactory
*
* Get the available keys for the metadata on @factory.
*
* Returns: (transfer full) (element-type utf8) (array zero-terminated=1):
* a %NULL-terminated array of key strings, or %NULL when there is no
* metadata. Free with g_strfreev() when no longer needed.
*
* Since: 1.4
*/
gchar **
gst_device_monitor_factory_get_metadata_keys (GstDeviceMonitorFactory * factory)
{
GstStructure *metadata;
gchar **arr;
gint i, num;
g_return_val_if_fail (GST_IS_DEVICE_MONITOR_FACTORY (factory), NULL);
metadata = (GstStructure *) factory->metadata;
if (metadata == NULL)
return NULL;
num = gst_structure_n_fields (metadata);
if (num == 0)
return NULL;
arr = g_new (gchar *, num + 1);
for (i = 0; i < num; ++i) {
arr[i] = g_strdup (gst_structure_nth_field_name (metadata, i));
}
arr[i] = NULL;
return arr;
}
typedef struct
{
GstDeviceMonitorFactoryListType type;
GstRank minrank;
} FilterData;
/**
* gst_device_monitor_factory_list_is_type:
* @factory: a #GstDeviceMonitorFactory
* @type: a #GstDeviceMonitorFactoryListType
*
* Check if @factory is of the given types.
*
* Returns: %TRUE if @factory is of @type.
*
* Since: 1.4
*/
gboolean
gst_device_monitor_factory_list_is_type (GstDeviceMonitorFactory * factory,
GstDeviceMonitorFactoryListType type)
{
gboolean res = FALSE;
const gchar *klass;
klass = gst_device_monitor_factory_get_metadata (factory,
GST_ELEMENT_METADATA_KLASS);
if (klass == NULL) {
GST_ERROR_OBJECT (factory,
"device monitor factory is missing klass identifiers");
return res;
}
/* Filter by device monitor type first, as soon as it matches
* one type, we skip all other tests */
if (!res && (type & GST_DEVICE_MONITOR_FACTORY_TYPE_SINK))
res = (strstr (klass, "Sink") != NULL);
if (!res && (type & GST_DEVICE_MONITOR_FACTORY_TYPE_SRC))
res = (strstr (klass, "Source") != NULL);
/* Filter by media type now, we only test if it
* matched any of the types above. */
if (res
&& (type & (GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_AUDIO |
GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_VIDEO |
GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_IMAGE)))
res = ((type & GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_AUDIO)
&& (strstr (klass, "Audio") != NULL))
|| ((type & GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_VIDEO)
&& (strstr (klass, "Video") != NULL))
|| ((type & GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_IMAGE)
&& (strstr (klass, "Image") != NULL));
return res;
}
static gboolean
device_monitor_filter (GstPluginFeature * feature, FilterData * data)
{
gboolean res;
/* we only care about device monitor factories */
if (G_UNLIKELY (!GST_IS_DEVICE_MONITOR_FACTORY (feature)))
return FALSE;
res = (gst_plugin_feature_get_rank (feature) >= data->minrank) &&
gst_device_monitor_factory_list_is_type (GST_DEVICE_MONITOR_FACTORY_CAST
(feature), data->type);
return res;
}
/**
* gst_device_monitor_factory_list_get_device_monitors:
* @type: a #GstDeviceMonitorFactoryListType
* @minrank: Minimum rank
*
* Get a list of factories that match the given @type. Only device monitors
* with a rank greater or equal to @minrank will be returned.
* The list of factories is returned by decreasing rank.
*
* Returns: (transfer full) (element-type Gst.DeviceMonitorFactory): a #GList of
* #GstDeviceMonitorFactory device monitors. Use gst_plugin_feature_list_free() after
* usage.
*
* Since: 1.4
*/
GList *gst_device_monitor_factory_list_get_device_monitors
(GstDeviceMonitorFactoryListType type, GstRank minrank)
{
GList *result;
FilterData data;
/* prepare type */
data.type = type;
data.minrank = minrank;
/* get the feature list using the filter */
result = gst_registry_feature_filter (gst_registry_get (),
(GstPluginFeatureFilter) device_monitor_filter, FALSE, &data);
/* sort on rank and name */
result = g_list_sort (result, gst_plugin_feature_rank_compare_func);
return result;
}

124
gst/gstdevicemonitorfactory.h Normal file
View file

@ -0,0 +1,124 @@
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000,2004 Wim Taymans <wim@fluendo.com>
* 2012 Olivier Crete <olivier.crete@collabora.com>
*
* gstdevicemonitorfactory.h: Header for GstDeviceMonitorFactory
*
* 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_DEVICE_MONITOR_FACTORY_H__
#define __GST_DEVICE_MONITOR_FACTORY_H__
/**
* GstDeviceMonitorFactory:
*
* The opaque #GstDeviceMonitorFactory data structure.
*
* Since: 1.4
*/
typedef struct _GstDeviceMonitorFactory GstDeviceMonitorFactory;
typedef struct _GstDeviceMonitorFactoryClass GstDeviceMonitorFactoryClass;
#include <gst/gstconfig.h>
#include <gst/gstplugin.h>
#include <gst/gstpluginfeature.h>
#include <gst/gstdevicemonitor.h>
G_BEGIN_DECLS
#define GST_TYPE_DEVICE_MONITOR_FACTORY (gst_device_monitor_factory_get_type())
#define GST_DEVICE_MONITOR_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DEVICE_MONITOR_FACTORY,\
GstDeviceMonitorFactory))
#define GST_DEVICE_MONITOR_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DEVICE_MONITOR_FACTORY,\
GstDeviceMonitorFactoryClass))
#define GST_IS_DEVICE_MONITOR_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DEVICE_MONITOR_FACTORY))
#define GST_IS_DEVICE_MONITOR_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DEVICE_MONITOR_FACTORY))
#define GST_DEVICE_MONITOR_FACTORY_CAST(obj) ((GstDeviceMonitorFactory *)(obj))
GType gst_device_monitor_factory_get_type (void);
GstDeviceMonitorFactory * gst_device_monitor_factory_find (const gchar *name);
GType gst_device_monitor_factory_get_device_monitor_type (GstDeviceMonitorFactory *factory);
const gchar * gst_device_monitor_factory_get_metadata (GstDeviceMonitorFactory *factory, const gchar *key);
gchar ** gst_device_monitor_factory_get_metadata_keys (GstDeviceMonitorFactory *factory);
GstDeviceMonitor* gst_device_monitor_factory_get (GstDeviceMonitorFactory *factory) G_GNUC_MALLOC;
GstDeviceMonitor* gst_device_monitor_factory_get_by_name (const gchar *factoryname) G_GNUC_MALLOC;
gboolean gst_device_monitor_register (GstPlugin *plugin, const gchar *name,
guint rank,
GType type);
/* Factory list functions */
/**
* GstDeviceMonitorFactoryListType:
* @GST_DEVICE_MONITOR_FACTORY_TYPE_SINK: Sink elements
* @GST_DEVICE_MONITOR_FACTORY_TYPE_SRC: Source elements
* @GST_DEVICE_MONITOR_FACTORY_TYPE_MAX_DEVICE_MONITORS: Private, do not use
* @GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_VIDEO: Elements handling video media types
* @GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_AUDIO: Elements handling audio media types
* @GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_IMAGE: Elements handling image media types
* @GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_SUBTITLE: Elements handling subtitle media types
* @GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_METADATA: Elements handling metadata media types
*
* The type of #GstDeviceMonitorFactory to filter.
*
* All @GstDeviceMonitorFactoryListType up to @GST_DEVICE_MONITOR_FACTORY_TYPE_MAX_DEVICE_MONITORS are exclusive.
*
* If one or more of the MEDIA types are specified, then only elements
* matching the specified media types will be selected.
*
* Since: 1.4
*/
typedef guint64 GstDeviceMonitorFactoryListType;
#define GST_DEVICE_MONITOR_FACTORY_TYPE_SINK (G_GUINT64_CONSTANT (1) << 0)
#define GST_DEVICE_MONITOR_FACTORY_TYPE_SRC (G_GUINT64_CONSTANT (1) << 1)
#define GST_DEVICE_MONITOR_FACTORY_TYPE_MAX_DEVICE_MONITORS (G_GUINT64_CONSTANT (1) << 48)
#define GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_VIDEO (G_GUINT64_CONSTANT (1) << 49)
#define GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_AUDIO (G_GUINT64_CONSTANT (1) << 50)
#define GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_IMAGE (G_GUINT64_CONSTANT (1) << 51)
#define GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_SUBTITLE (G_GUINT64_CONSTANT (1) << 52)
#define GST_DEVICE_MONITOR_FACTORY_TYPE_MEDIA_METADATA (G_GUINT64_CONSTANT (1) << 53)
/* Element klass defines */
#define GST_DEVICE_MONITOR_FACTORY_KLASS_DECODER "Decoder"
#define GST_DEVICE_MONITOR_FACTORY_KLASS_ENCODER "Encoder"
#define GST_DEVICE_MONITOR_FACTORY_KLASS_MEDIA_VIDEO "Video"
#define GST_DEVICE_MONITOR_FACTORY_KLASS_MEDIA_AUDIO "Audio"
#define GST_DEVICE_MONITOR_FACTORY_KLASS_MEDIA_IMAGE "Image"
#define GST_DEVICE_MONITOR_FACTORY_KLASS_MEDIA_SUBTITLE "Subtitle"
#define GST_DEVICE_MONITOR_FACTORY_KLASS_MEDIA_METADATA "Metadata"
gboolean gst_device_monitor_factory_list_is_type (GstDeviceMonitorFactory *factory,
GstDeviceMonitorFactoryListType type);
GList * gst_device_monitor_factory_list_get_device_monitors (GstDeviceMonitorFactoryListType type,
GstRank minrank) G_GNUC_MALLOC;
G_END_DECLS
#endif /* __GST_DEVICE_MONITOR_FACTORY_H__ */

104
gst/gstmessage.c
View file

@ -108,7 +108,8 @@ static GstMessageQuarks message_quarks[] = {
{GST_MESSAGE_NEED_CONTEXT, "need-context", 0},
{GST_MESSAGE_HAVE_CONTEXT, "have-context", 0},
{GST_MESSAGE_EXTENDED, "extended", 0},
{GST_MESSAGE_DEVICE, "device", 0},
{GST_MESSAGE_DEVICE_ADDED, "device-added", 0},
{GST_MESSAGE_DEVICE_REMOVED, "device-removed", 0},
{0, NULL, 0}
};
@ -2357,3 +2358,104 @@ gst_message_parse_have_context (GstMessage * message, GstContext ** context)
gst_structure_id_get (GST_MESSAGE_STRUCTURE (message),
GST_QUARK (CONTEXT), GST_TYPE_CONTEXT, context, NULL);
}
/**
* gst_message_new_device_added:
* @src: The #GstObject that created the message
* @device: (transfer none): The new #GstDevice
*
* Creates a new device-added message. The device-added message is produced by
* #GstDeviceMonitor or a #GstGlobalDeviceMonitor. They announce the appearance
* of monitored devices.
*
* Returns: a newly allocated #GstMessage
*
* Since: 1.4
*/
GstMessage *
gst_message_new_device_added (GstObject * src, GstDevice * device)
{
GstMessage *message;
GstStructure *structure;
structure = gst_structure_new_id (GST_QUARK (MESSAGE_DEVICE_ADDED),
GST_QUARK (DEVICE), GST_TYPE_DEVICE, device, NULL);
message = gst_message_new_extended (GST_MESSAGE_DEVICE_ADDED, src, structure);
return message;
}
/**
* gst_message_parse_device_added:
* @device: (out) (allow-none) (transfer none): A location where to store a
* pointer to the new #GstDevice, or %NULL
*
* Parses a device-added message. The device-added message is produced by
* #GstDeviceMonitor or a #GstGlobalDeviceMonitor. It announces the appearance
* of monitored devices.
*
* Since: 1.4
*/
void
gst_message_parse_device_added (GstMessage * message, GstDevice ** device)
{
g_return_if_fail (GST_IS_MESSAGE (message));
g_return_if_fail (GST_MESSAGE_TYPE (message) == GST_MESSAGE_EXTENDED);
g_return_if_fail (gst_message_get_extended_type (message) ==
GST_MESSAGE_DEVICE_ADDED);
if (device)
gst_structure_id_get (GST_MESSAGE_STRUCTURE (message),
GST_QUARK (DEVICE), GST_TYPE_DEVICE, device, NULL);
}
/**
* gst_message_new_device_removed:
* @src: The #GstObject that created the message
* @device: (transfer none): The removed #GstDevice
*
* Creates a new device-removed message. The device-removed message is produced
* by #GstDeviceMonitor or a #GstGlobalDeviceMonitor. They announce the
* disappearance of monitored devices.
*
* Returns: a newly allocated #GstMessage
*
* Since: 1.4
*/
GstMessage *
gst_message_new_device_removed (GstObject * src, GstDevice * device)
{
GstMessage *message;
GstStructure *structure;
structure = gst_structure_new_id (GST_QUARK (MESSAGE_DEVICE_REMOVED),
GST_QUARK (DEVICE), GST_TYPE_DEVICE, device, NULL);
message = gst_message_new_extended (GST_MESSAGE_DEVICE_REMOVED, src,
structure);
return message;
}
/**
* gst_message_parse_device_removed:
* @device: (out) (allow-none) (transfer none): A location where to store a
* pointer to the removed #GstDevice, or %NULL
*
* Parses a device-removed message. The device-removed message is produced by
* #GstDeviceMonitor or a #GstGlobalDeviceMonitor. It announces the
* disappearance of monitored devices.
*
* Since: 1.4
*/
void
gst_message_parse_device_removed (GstMessage * message, GstDevice ** device)
{
g_return_if_fail (GST_IS_MESSAGE (message));
g_return_if_fail (GST_MESSAGE_TYPE (message) == GST_MESSAGE_EXTENDED);
g_return_if_fail (gst_message_get_extended_type (message) ==
GST_MESSAGE_DEVICE_REMOVED);
if (device)
gst_structure_id_get (GST_MESSAGE_STRUCTURE (message),
GST_QUARK (DEVICE), GST_TYPE_DEVICE, device, NULL);
}

21
gst/gstmessage.h
View file

@ -149,15 +149,20 @@ typedef enum
/**
* GstMessageExtendedType:
* @GST_MESSAGE_DEVICE: A #GstDevice addition or removal according to
* a #GstDeviceMonitor
* @GST_MESSAGE_DEVICE_ADDED: A #GstDevice addition according to
* a #GstDeviceMonitor (Since 1.4)
* @GST_MESSAGE_DEVICE_REMOVED: A #GstDevice removal according to
* a #GstDeviceMonitor (Since 1.4)
*
* Extra message types, see #GstMessageType for the basic types
*
* Since: 1.4
*/
typedef enum {
/* Skip those defined in #GstMessage to avoid confusion */
GST_MESSAGE_DEVICE = 3
GST_MESSAGE_DEVICE_ADDED = 3,
GST_MESSAGE_DEVICE_REMOVED = 5
} GstMessageExtendedType;
#include <gst/gstminiobject.h>
@ -167,6 +172,7 @@ typedef enum {
#include <gst/gststructure.h>
#include <gst/gstquery.h>
#include <gst/gsttoc.h>
#include <gst/gstdevice.h>
#define GST_TYPE_MESSAGE (gst_message_get_type())
#define GST_IS_MESSAGE(obj) (GST_IS_MINI_OBJECT_TYPE (obj, GST_TYPE_MESSAGE))
@ -591,6 +597,15 @@ gboolean gst_message_parse_context_type (GstMessage * message, const gch
GstMessage * gst_message_new_have_context (GstObject * src, GstContext *context) G_GNUC_MALLOC;
void gst_message_parse_have_context (GstMessage *message, GstContext **context);
/* DEVICE_ADDED */
GstMessage * gst_message_new_device_added (GstObject * src, GstDevice * device) G_GNUC_MALLOC;
void gst_message_parse_device_added (GstMessage * message, GstDevice ** device);
/* DEVICE_REMOVED */
GstMessage * gst_message_new_device_removed (GstObject * src, GstDevice * device) G_GNUC_MALLOC;
void gst_message_parse_device_removed (GstMessage * message, GstDevice ** device);
G_END_DECLS
#endif /* __GST_MESSAGE_H__ */

3
gst/gstquark.c
View file

@ -68,7 +68,8 @@ static const gchar *_quark_strings[] = {
"GstEventSegmentDone",
"GstEventStreamStart", "stream-id", "GstQueryContext",
"GstMessageNeedContext", "GstMessageHaveContext", "context", "context-type",
"GstMessageStreamStart", "group-id", "uri-redirection", "GstMessageExtended"
"GstMessageStreamStart", "group-id", "uri-redirection", "GstMessageExtended",
"GstMessageDeviceAdded", "GstMessageDeviceRemoved", "device"
};
GQuark _priv_gst_quark_table[GST_QUARK_MAX];

5
gst/gstquark.h
View file

@ -197,7 +197,10 @@ typedef enum _GstQuarkId
GST_QUARK_GROUP_ID = 168,
GST_QUARK_URI_REDIRECTION = 169,
GST_QUARK_MESSAGE_EXTENDED = 170,
GST_QUARK_MAX = 171
GST_QUARK_MESSAGE_DEVICE_ADDED = 171,
GST_QUARK_MESSAGE_DEVICE_REMOVED = 172,
GST_QUARK_DEVICE = 173,
GST_QUARK_MAX = 174
} GstQuarkId;
extern GQuark _priv_gst_quark_table[GST_QUARK_MAX];

33
gst/gstregistry.c
View file

@ -129,6 +129,7 @@
#include "gstinfo.h"
#include "gsterror.h"
#include "gstregistry.h"
#include "gstdevicemonitorfactory.h"
#include "gstpluginloader.h"
@ -167,6 +168,8 @@ struct _GstRegistryPrivate
guint32 efl_cookie;
GList *typefind_factory_list;
guint32 tfl_cookie;
GList *device_monitor_factory_list;
guint32 dmfl_cookie;
};
/* the one instance of the default registry and the mutex protecting the
@ -316,6 +319,12 @@ gst_registry_finalize (GObject * object)
gst_plugin_feature_list_free (registry->priv->typefind_factory_list);
}
if (registry->priv->device_monitor_factory_list) {
GST_DEBUG_OBJECT (registry,
"Cleaning up cached device monitor factory list");
gst_plugin_feature_list_free (registry->priv->device_monitor_factory_list);
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
@ -780,6 +789,28 @@ gst_registry_get_typefind_factory_list (GstRegistry * registry)
return list;
}
static GList *
gst_registry_get_device_monitor_factory_list (GstRegistry * registry)
{
GList *list;
GST_OBJECT_LOCK (registry);
gst_registry_get_feature_list_or_create (registry,
&registry->priv->device_monitor_factory_list,
&registry->priv->dmfl_cookie, GST_TYPE_DEVICE_MONITOR_FACTORY);
/* Return reffed copy */
list =
gst_plugin_feature_list_copy (registry->priv->
device_monitor_factory_list);
GST_OBJECT_UNLOCK (registry);
return list;
}
/**
* gst_registry_feature_filter:
* @registry: registry to query
@ -922,6 +953,8 @@ gst_registry_get_feature_list (GstRegistry * registry, GType type)
return gst_registry_get_element_factory_list (registry);
else if (type == GST_TYPE_TYPE_FIND_FACTORY)
return gst_registry_get_typefind_factory_list (registry);
else if (type == GST_TYPE_DEVICE_MONITOR_FACTORY)
return gst_registry_get_device_monitor_factory_list (registry);
data.type = type;
data.name = NULL;

2
gst/gstregistrybinary.c
View file

@ -56,6 +56,7 @@
#include <gst/gstelement.h>
#include <gst/gsttypefind.h>
#include <gst/gsttypefindfactory.h>
#include <gst/gstdevicemonitorfactory.h>
#include <gst/gsturi.h>
#include <gst/gstinfo.h>
#include <gst/gstenumtypes.h>
@ -525,6 +526,7 @@ priv_gst_registry_binary_read_cache (GstRegistry * registry,
/* make sure these types exist */
GST_TYPE_ELEMENT_FACTORY;
GST_TYPE_TYPE_FIND_FACTORY;
GST_TYPE_DEVICE_MONITOR_FACTORY;
#ifndef GST_DISABLE_GST_DEBUG
timer = g_timer_new ();

42
gst/gstregistrychunks.c
View file

@ -33,6 +33,7 @@
#include <gst/gstelement.h>
#include <gst/gsttypefind.h>
#include <gst/gsttypefindfactory.h>
#include <gst/gstdevicemonitorfactory.h>
#include <gst/gsturi.h>
#include <gst/gstinfo.h>
#include <gst/gstenumtypes.h>
@ -332,6 +333,23 @@ gst_registry_chunks_save_feature (GList ** list, GstPluginFeature * feature)
} else {
gst_registry_chunks_save_const_string (list, "");
}
} else if (GST_IS_DEVICE_MONITOR_FACTORY (feature)) {
GstRegistryChunkDeviceMonitorFactory *tff;
GstDeviceMonitorFactory *factory = GST_DEVICE_MONITOR_FACTORY (feature);
/* Initialize with zeroes because of struct padding and
* valgrind complaining about copying unitialized memory
*/
tff = g_slice_new0 (GstRegistryChunkDeviceMonitorFactory);
chk =
gst_registry_chunks_make_data (tff,
sizeof (GstRegistryChunkDeviceMonitorFactory));
pf = (GstRegistryChunkPluginFeature *) tff;
/* pack element metadata strings */
gst_registry_chunks_save_string (list,
gst_structure_to_string (factory->metadata));
} else {
GST_WARNING_OBJECT (feature, "unhandled feature type '%s'", type_name);
}
@ -650,6 +668,30 @@ gst_registry_chunks_load_feature (GstRegistry * registry, gchar ** in,
factory->extensions[i - 1] = str;
}
}
} else if (GST_IS_DEVICE_MONITOR_FACTORY (feature)) {
GstRegistryChunkDeviceMonitorFactory *dmf;
GstDeviceMonitorFactory *factory = GST_DEVICE_MONITOR_FACTORY (feature);
const gchar *meta_data_str;
align (*in);
GST_DEBUG
("Reading/casting for GstRegistryChunkPluginFeature at address %p",
*in);
unpack_element (*in, dmf, GstRegistryChunkDeviceMonitorFactory, end, fail);
pf = (GstRegistryChunkPluginFeature *) dmf;
/* unpack element factory strings */
unpack_string_nocopy (*in, meta_data_str, end, fail);
if (meta_data_str && *meta_data_str) {
factory->metadata = gst_structure_from_string (meta_data_str, NULL);
if (!factory->metadata) {
GST_ERROR
("Error when trying to deserialize structure for metadata '%s'",
meta_data_str);
goto fail;
}
}
} else {
GST_WARNING ("unhandled factory type : %s", G_OBJECT_TYPE_NAME (feature));
goto fail;

13
gst/gstregistrychunks.h
View file

@ -122,7 +122,7 @@ typedef struct _GstRegistryChunkElementFactory
* GstRegistryChunkTypeFindFactory:
* @nextensions: stores the number of typefind extensions
*
* A structure containing the element factory fields
* A structure containing the type find factory fields
*/
typedef struct _GstRegistryChunkTypeFindFactory
{
@ -131,6 +131,17 @@ typedef struct _GstRegistryChunkTypeFindFactory
guint nextensions;
} GstRegistryChunkTypeFindFactory;
/*
* GstRegistryChunkDeviceMonitorFactory:
*
* A structure containing the device monitor factory fields
*/
typedef struct _GstRegistryChunkDeviceMonitorFactory
{
GstRegistryChunkPluginFeature plugin_feature;
} GstRegistryChunkDeviceMonitorFactory;
/*
* GstRegistryChunkPadTemplate:
*

35
win32/common/libgstreamer.def
View file

@ -390,6 +390,35 @@ EXPORTS
gst_debug_set_threshold_from_string
gst_debug_unset_threshold_for_name
gst_deinit
gst_device_create_element
gst_device_get_caps
gst_device_get_display_name
gst_device_get_type
gst_device_monitor_can_monitor
gst_device_monitor_class_add_metadata
gst_device_monitor_class_add_static_metadata
gst_device_monitor_class_get_metadata
gst_device_monitor_class_set_metadata
gst_device_monitor_class_set_static_metadata
gst_device_monitor_device_add
gst_device_monitor_device_remove
gst_device_monitor_factory_find
gst_device_monitor_factory_get
gst_device_monitor_factory_get_by_name
gst_device_monitor_factory_get_device_monitor_type
gst_device_monitor_factory_get_metadata
gst_device_monitor_factory_get_metadata_keys
gst_device_monitor_factory_get_type
gst_device_monitor_factory_list_get_device_monitors
gst_device_monitor_factory_list_is_type
gst_device_monitor_get_bus
gst_device_monitor_get_devices
gst_device_monitor_get_factory
gst_device_monitor_get_type
gst_device_monitor_register
gst_device_monitor_start
gst_device_monitor_stop
gst_device_reconfigure_element
gst_double_range_get_type
gst_element_abort_state
gst_element_add_pad
@ -592,6 +621,8 @@ EXPORTS
gst_memory_resize
gst_memory_share
gst_memory_unmap
gst_message_extended_type_get_type
gst_message_get_extended_type
gst_message_get_seqnum
gst_message_get_stream_status_object
gst_message_get_structure
@ -604,6 +635,8 @@ EXPORTS
gst_message_new_clock_lost
gst_message_new_clock_provide
gst_message_new_custom
gst_message_new_device_added
gst_message_new_device_removed
gst_message_new_duration_changed
gst_message_new_element
gst_message_new_eos
@ -635,6 +668,8 @@ EXPORTS
gst_message_parse_clock_lost
gst_message_parse_clock_provide
gst_message_parse_context_type
gst_message_parse_device_added
gst_message_parse_device_removed
gst_message_parse_error
gst_message_parse_group_id
gst_message_parse_have_context