gstreamer/subprojects/gst-plugins-bad/sys/wasapi/gstwasapidevice.c

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/* GStreamer
* Copyright (C) 2018 Nirbheek Chauhan <nirbheek@centricular.com>
* Copyright (C) 2021 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstwasapidevice.h"
GST_DEBUG_CATEGORY_EXTERN (gst_wasapi_debug);
#define GST_CAT_DEFAULT gst_wasapi_debug
G_DEFINE_TYPE (GstWasapiDeviceProvider, gst_wasapi_device_provider,
GST_TYPE_DEVICE_PROVIDER);
static void gst_wasapi_device_provider_finalize (GObject * object);
static GList *gst_wasapi_device_provider_probe (GstDeviceProvider * provider);
static gboolean gst_wasapi_device_provider_start (GstDeviceProvider * provider);
static void gst_wasapi_device_provider_stop (GstDeviceProvider * provider);
static HRESULT
gst_wasapi_device_provider_device_added (GstMMDeviceEnumerator * enumerator,
LPCWSTR device_id, gpointer user_data);
static HRESULT
gst_wasapi_device_provider_device_removed (GstMMDeviceEnumerator * enumerator,
LPCWSTR device_id, gpointer user_data);
static HRESULT
gst_wasapi_device_provider_default_device_changed (GstMMDeviceEnumerator *
enumerator, EDataFlow flow, ERole role, LPCWSTR device_id,
gpointer user_data);
static void
gst_wasapi_device_provider_class_init (GstWasapiDeviceProviderClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstDeviceProviderClass *dm_class = GST_DEVICE_PROVIDER_CLASS (klass);
gobject_class->finalize = gst_wasapi_device_provider_finalize;
dm_class->probe = gst_wasapi_device_provider_probe;
dm_class->start = gst_wasapi_device_provider_start;
dm_class->stop = gst_wasapi_device_provider_stop;
gst_device_provider_class_set_static_metadata (dm_class,
"WASAPI (Windows Audio Session API) Device Provider",
"Source/Sink/Audio", "List WASAPI source and sink devices",
"Nirbheek Chauhan <nirbheek@centricular.com>");
}
static void
gst_wasapi_device_provider_init (GstWasapiDeviceProvider * self)
{
self->enumerator = gst_mm_device_enumerator_new ();
}
static gboolean
gst_wasapi_device_provider_start (GstDeviceProvider * provider)
{
GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (provider);
GstMMNotificationClientCallbacks callbacks = { NULL, };
GList *devices = NULL;
GList *iter;
if (!self->enumerator) {
GST_WARNING_OBJECT (self, "Enumerator wasn't configured");
return FALSE;
}
callbacks.device_added = gst_wasapi_device_provider_device_added;
callbacks.device_removed = gst_wasapi_device_provider_device_removed;
callbacks.default_device_changed =
gst_wasapi_device_provider_default_device_changed;
if (!gst_mm_device_enumerator_set_notification_callback (self->enumerator,
&callbacks, self)) {
GST_WARNING_OBJECT (self, "Failed to set callbacks");
return FALSE;
}
/* baseclass will not call probe() once it's started, but we can get
* notification only add/remove or change case. To this manually */
devices = gst_wasapi_device_provider_probe (provider);
if (devices) {
for (iter = devices; iter; iter = g_list_next (iter)) {
gst_device_provider_device_add (provider, GST_DEVICE (iter->data));
}
g_list_free (devices);
}
return TRUE;
}
static void
gst_wasapi_device_provider_stop (GstDeviceProvider * provider)
{
GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (provider);
if (self->enumerator) {
gst_mm_device_enumerator_set_notification_callback (self->enumerator,
NULL, NULL);
}
}
static void
gst_wasapi_device_provider_finalize (GObject * object)
{
GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (object);
gst_clear_object (&self->enumerator);
G_OBJECT_CLASS (gst_wasapi_device_provider_parent_class)->finalize (object);
}
static GList *
gst_wasapi_device_provider_probe (GstDeviceProvider * provider)
{
GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (provider);
GList *devices = NULL;
if (!gst_wasapi_util_get_devices (self->enumerator, TRUE, &devices))
GST_ERROR_OBJECT (self, "Failed to enumerate devices");
return devices;
}
static gboolean
gst_wasapi_device_is_in_list (GList * list, GstDevice * device)
{
GList *iter;
GstStructure *s;
const gchar *device_id;
gboolean found = FALSE;
s = gst_device_get_properties (device);
g_assert (s);
device_id = gst_structure_get_string (s, "device.strid");
g_assert (device_id);
for (iter = list; iter; iter = g_list_next (iter)) {
GstStructure *other_s;
const gchar *other_id;
other_s = gst_device_get_properties (GST_DEVICE (iter->data));
g_assert (other_s);
other_id = gst_structure_get_string (other_s, "device.strid");
g_assert (other_id);
if (g_ascii_strcasecmp (device_id, other_id) == 0) {
found = TRUE;
}
gst_structure_free (other_s);
if (found)
break;
}
gst_structure_free (s);
return found;
}
static void
gst_wasapi_device_provider_update_devices (GstWasapiDeviceProvider * self)
{
GstDeviceProvider *provider = GST_DEVICE_PROVIDER_CAST (self);
GList *prev_devices = NULL;
GList *new_devices = NULL;
GList *to_add = NULL;
GList *to_remove = NULL;
GList *iter;
GST_OBJECT_LOCK (self);
prev_devices = g_list_copy_deep (provider->devices,
(GCopyFunc) gst_object_ref, NULL);
GST_OBJECT_UNLOCK (self);
new_devices = gst_wasapi_device_provider_probe (provider);
/* Ownership of GstDevice for gst_device_provider_device_add()
* and gst_device_provider_device_remove() is a bit complicated.
* Remove floating reference here for things to be clear */
for (iter = new_devices; iter; iter = g_list_next (iter))
gst_object_ref_sink (iter->data);
/* Check newly added devices */
for (iter = new_devices; iter; iter = g_list_next (iter)) {
if (!gst_wasapi_device_is_in_list (prev_devices, GST_DEVICE (iter->data))) {
to_add = g_list_prepend (to_add, gst_object_ref (iter->data));
}
}
/* Check removed device */
for (iter = prev_devices; iter; iter = g_list_next (iter)) {
if (!gst_wasapi_device_is_in_list (new_devices, GST_DEVICE (iter->data))) {
to_remove = g_list_prepend (to_remove, gst_object_ref (iter->data));
}
}
for (iter = to_remove; iter; iter = g_list_next (iter))
gst_device_provider_device_remove (provider, GST_DEVICE (iter->data));
for (iter = to_add; iter; iter = g_list_next (iter))
gst_device_provider_device_add (provider, GST_DEVICE (iter->data));
if (prev_devices)
g_list_free_full (prev_devices, (GDestroyNotify) gst_object_unref);
if (to_add)
g_list_free_full (to_add, (GDestroyNotify) gst_object_unref);
if (to_remove)
g_list_free_full (to_remove, (GDestroyNotify) gst_object_unref);
}
static HRESULT
gst_wasapi_device_provider_device_added (GstMMDeviceEnumerator * enumerator,
LPCWSTR device_id, gpointer user_data)
{
GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (user_data);
gst_wasapi_device_provider_update_devices (self);
return S_OK;
}
static HRESULT
gst_wasapi_device_provider_device_removed (GstMMDeviceEnumerator * enumerator,
LPCWSTR device_id, gpointer user_data)
{
GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (user_data);
gst_wasapi_device_provider_update_devices (self);
return S_OK;
}
static HRESULT
gst_wasapi_device_provider_default_device_changed (GstMMDeviceEnumerator *
enumerator, EDataFlow flow, ERole role, LPCWSTR device_id,
gpointer user_data)
{
GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (user_data);
gst_wasapi_device_provider_update_devices (self);
return S_OK;
}
/* GstWasapiDevice begins */
enum
{
PROP_DEVICE_STRID = 1,
};
G_DEFINE_TYPE (GstWasapiDevice, gst_wasapi_device, GST_TYPE_DEVICE);
static void gst_wasapi_device_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_wasapi_device_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_wasapi_device_finalize (GObject * object);
static GstElement *gst_wasapi_device_create_element (GstDevice * device,
const gchar * name);
static void
gst_wasapi_device_class_init (GstWasapiDeviceClass * klass)
{
GstDeviceClass *dev_class = GST_DEVICE_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
dev_class->create_element = gst_wasapi_device_create_element;
object_class->get_property = gst_wasapi_device_get_property;
object_class->set_property = gst_wasapi_device_set_property;
object_class->finalize = gst_wasapi_device_finalize;
g_object_class_install_property (object_class, PROP_DEVICE_STRID,
g_param_spec_string ("device", "Device string ID",
"Device strId", NULL,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
}
static void
gst_wasapi_device_init (GstWasapiDevice * device)
{
}
static void
gst_wasapi_device_finalize (GObject * object)
{
GstWasapiDevice *device = GST_WASAPI_DEVICE (object);
g_free (device->strid);
G_OBJECT_CLASS (gst_wasapi_device_parent_class)->finalize (object);
}
static GstElement *
gst_wasapi_device_create_element (GstDevice * device, const gchar * name)
{
GstWasapiDevice *wasapi_dev = GST_WASAPI_DEVICE (device);
GstElement *elem;
elem = gst_element_factory_make (wasapi_dev->element, name);
g_object_set (elem, "device", wasapi_dev->strid, NULL);
return elem;
}
static void
gst_wasapi_device_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstWasapiDevice *device = GST_WASAPI_DEVICE_CAST (object);
switch (prop_id) {
case PROP_DEVICE_STRID:
g_value_set_string (value, device->strid);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_wasapi_device_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstWasapiDevice *device = GST_WASAPI_DEVICE_CAST (object);
switch (prop_id) {
case PROP_DEVICE_STRID:
device->strid = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}