wasapi2: Add device provider implementation

Similar to device provider implementation of wasapi plugin,
this implementation supports only static probing.
But we can implement runtime device add/remove/update
monitoring using DeviceWatcher interface later.

See https://docs.microsoft.com/en-us/uwp/api/windows.devices.enumeration.devicewatcher

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1264>
This commit is contained in:
Seungha Yang 2020-05-28 05:09:47 +09:00 committed by Nirbheek Chauhan
parent 2778457678
commit a6a4267c7b
4 changed files with 287 additions and 0 deletions

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@ -0,0 +1,245 @@
/* GStreamer
* Copyright (C) 2018 Nirbheek Chauhan <nirbheek@centricular.com>
* Copyright (C) 2020 Seungha Yang <seungha@centricular.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstwasapi2device.h"
#include "gstwasapi2client.h"
GST_DEBUG_CATEGORY_EXTERN (gst_wasapi2_debug);
#define GST_CAT_DEFAULT gst_wasapi2_debug
enum
{
PROP_0,
PROP_DEVICE,
};
struct _GstWasapi2Device
{
GstDevice parent;
gchar *device_id;
const gchar *factory_name;
};
G_DEFINE_TYPE (GstWasapi2Device, gst_wasapi2_device, GST_TYPE_DEVICE);
static void gst_wasapi2_device_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_wasapi2_device_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_wasapi2_device_finalize (GObject * object);
static GstElement *gst_wasapi2_device_create_element (GstDevice * device,
const gchar * name);
static void
gst_wasapi2_device_class_init (GstWasapi2DeviceClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstDeviceClass *dev_class = GST_DEVICE_CLASS (klass);
dev_class->create_element = gst_wasapi2_device_create_element;
gobject_class->get_property = gst_wasapi2_device_get_property;
gobject_class->set_property = gst_wasapi2_device_set_property;
gobject_class->finalize = gst_wasapi2_device_finalize;
g_object_class_install_property (gobject_class, PROP_DEVICE,
g_param_spec_string ("device", "Device",
"WASAPI playback device as a GUID string", NULL,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
}
static void
gst_wasapi2_device_init (GstWasapi2Device * self)
{
}
static void
gst_wasapi2_device_finalize (GObject * object)
{
GstWasapi2Device *self = GST_WASAPI2_DEVICE (object);
g_free (self->device_id);
G_OBJECT_CLASS (gst_wasapi2_device_parent_class)->finalize (object);
}
static GstElement *
gst_wasapi2_device_create_element (GstDevice * device, const gchar * name)
{
GstWasapi2Device *self = GST_WASAPI2_DEVICE (device);
GstElement *elem;
elem = gst_element_factory_make (self->factory_name, name);
g_object_set (elem, "device", self->device_id, NULL);
return elem;
}
static void
gst_wasapi2_device_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstWasapi2Device *self = GST_WASAPI2_DEVICE (object);
switch (prop_id) {
case PROP_DEVICE:
g_value_set_string (value, self->device_id);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_wasapi2_device_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstWasapi2Device *self = GST_WASAPI2_DEVICE (object);
switch (prop_id) {
case PROP_DEVICE:
self->device_id = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
struct _GstWasapi2DeviceProvider
{
GstDeviceProvider parent;
};
G_DEFINE_TYPE (GstWasapi2DeviceProvider, gst_wasapi2_device_provider,
GST_TYPE_DEVICE_PROVIDER);
static GList *gst_wasapi2_device_provider_probe (GstDeviceProvider * provider);
static void
gst_wasapi2_device_provider_class_init (GstWasapi2DeviceProviderClass * klass)
{
GstDeviceProviderClass *provider_class = GST_DEVICE_PROVIDER_CLASS (klass);
provider_class->probe = GST_DEBUG_FUNCPTR (gst_wasapi2_device_provider_probe);
gst_device_provider_class_set_static_metadata (provider_class,
"WASAPI (Windows Audio Session API) Device Provider",
"Source/Sink/Audio", "List WASAPI source and sink devices",
"Nirbheek Chauhan <nirbheek@centricular.com>, "
"Seungha Yang <seungha@centricular.com>");
}
static void
gst_wasapi2_device_provider_init (GstWasapi2DeviceProvider * provider)
{
}
static void
gst_wasapi2_device_provider_probe_internal (GstWasapi2DeviceProvider * self,
GstWasapi2ClientDeviceClass client_class, GList ** devices)
{
gint i;
const gchar *device_class, *factory_name;
if (client_class == GST_WASAPI2_CLIENT_DEVICE_CLASS_RENDER) {
device_class = "Audio/Sink";
factory_name = "wasapi2sink";
} else {
device_class = "Audio/Source";
factory_name = "wasapi2src";
}
for (i = 0;; i++) {
GstWasapi2Client *client = NULL;
GstDevice *device;
GstStructure *props = NULL;
GstCaps *caps = NULL;
gchar *device_id = NULL;
gchar *device_name = NULL;
client = gst_wasapi2_client_new (client_class, FALSE, i, NULL);
if (!client)
return;
caps = gst_wasapi2_client_get_caps (client);
if (!caps) {
GST_WARNING_OBJECT (self, "Couldn't get caps from client %d", i);
goto next;
}
g_object_get (client,
"device", &device_id, "device-name", &device_name, NULL);
if (!device_id) {
GST_WARNING_OBJECT (self, "Couldn't get device name from client %d", i);
goto next;
}
if (!device_name) {
GST_WARNING_OBJECT (self, "Couldn't get device name from client %d", i);
goto next;
}
props = gst_structure_new ("wasapi2-proplist",
"device.api", G_TYPE_STRING, "wasapi",
"device.id", G_TYPE_STRING, device_id,
"device.default", G_TYPE_BOOLEAN, i == 0,
"wasapi.device.description", G_TYPE_STRING, device_name, NULL);
device = g_object_new (GST_TYPE_WASAPI2_DEVICE, "device", device_id,
"display-name", device_name, "caps", caps,
"device-class", device_class, "properties", props, NULL);
GST_WASAPI2_DEVICE (device)->factory_name = factory_name;
*devices = g_list_append (*devices, device);
next:
gst_clear_object (&client);
gst_clear_caps (&caps);
g_free (device_id);
g_free (device_name);
if (props)
gst_structure_free (props);
}
return;
}
static GList *
gst_wasapi2_device_provider_probe (GstDeviceProvider * provider)
{
GstWasapi2DeviceProvider *self = GST_WASAPI2_DEVICE_PROVIDER (provider);
GList *devices = NULL;
gst_wasapi2_device_provider_probe_internal (self,
GST_WASAPI2_CLIENT_DEVICE_CLASS_CAPTURE, &devices);
gst_wasapi2_device_provider_probe_internal (self,
GST_WASAPI2_CLIENT_DEVICE_CLASS_RENDER, &devices);
return devices;
}

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@ -0,0 +1,37 @@
/* GStreamer
* Copyright (C) 2020 Seungha Yang <seungha@centricular.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_WASAPI2_DEVICE_H__
#define __GST_WASAPI2_DEVICE_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_WASAPI2_DEVICE (gst_wasapi2_device_get_type())
#define GST_TYPE_WASAPI2_DEVICE_PROVIDER (gst_wasapi2_device_provider_get_type())
G_DECLARE_FINAL_TYPE (GstWasapi2Device, gst_wasapi2_device,
GST, WASAPI2_DEVICE, GstDevice);
G_DECLARE_FINAL_TYPE (GstWasapi2DeviceProvider, gst_wasapi2_device_provider,
GST, WASAPI2_DEVICE_PROVIDER, GstDeviceProvider);
G_END_DECLS
#endif /* __GST_WASAPI2_DEVICE_H__ */

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@ -3,6 +3,7 @@ wasapi2_sources = [
'gstwasapi2sink.c',
'gstwasapi2util.c',
'gstwasapi2client.cpp',
'gstwasapi2device.c',
'plugin.c',
]

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@ -25,6 +25,7 @@
#include "gstwasapi2sink.h"
#include "gstwasapi2src.h"
#include "gstwasapi2device.h"
GST_DEBUG_CATEGORY (gst_wasapi2_debug);
GST_DEBUG_CATEGORY (gst_wasapi2_client_debug);
@ -46,6 +47,9 @@ plugin_init (GstPlugin * plugin)
gst_element_register (plugin, "wasapi2sink", rank, GST_TYPE_WASAPI2_SINK);
gst_element_register (plugin, "wasapi2src", rank, GST_TYPE_WASAPI2_SRC);
gst_device_provider_register (plugin, "wasapi2deviceprovider",
rank, GST_TYPE_WASAPI2_DEVICE_PROVIDER);
return TRUE;
}