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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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362 lines
11 KiB
C
362 lines
11 KiB
C
/* GStreamer
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* Copyright (C) 2018 Nirbheek Chauhan <nirbheek@centricular.com>
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* Copyright (C) 2021 Seungha Yang <seungha@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstwasapidevice.h"
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GST_DEBUG_CATEGORY_EXTERN (gst_wasapi_debug);
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#define GST_CAT_DEFAULT gst_wasapi_debug
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G_DEFINE_TYPE (GstWasapiDeviceProvider, gst_wasapi_device_provider,
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GST_TYPE_DEVICE_PROVIDER);
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static void gst_wasapi_device_provider_finalize (GObject * object);
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static GList *gst_wasapi_device_provider_probe (GstDeviceProvider * provider);
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static gboolean gst_wasapi_device_provider_start (GstDeviceProvider * provider);
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static void gst_wasapi_device_provider_stop (GstDeviceProvider * provider);
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static HRESULT
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gst_wasapi_device_provider_device_added (GstMMDeviceEnumerator * enumerator,
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LPCWSTR device_id, gpointer user_data);
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static HRESULT
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gst_wasapi_device_provider_device_removed (GstMMDeviceEnumerator * enumerator,
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LPCWSTR device_id, gpointer user_data);
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static HRESULT
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gst_wasapi_device_provider_default_device_changed (GstMMDeviceEnumerator *
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enumerator, EDataFlow flow, ERole role, LPCWSTR device_id,
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gpointer user_data);
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static void
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gst_wasapi_device_provider_class_init (GstWasapiDeviceProviderClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstDeviceProviderClass *dm_class = GST_DEVICE_PROVIDER_CLASS (klass);
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gobject_class->finalize = gst_wasapi_device_provider_finalize;
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dm_class->probe = gst_wasapi_device_provider_probe;
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dm_class->start = gst_wasapi_device_provider_start;
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dm_class->stop = gst_wasapi_device_provider_stop;
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gst_device_provider_class_set_static_metadata (dm_class,
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"WASAPI (Windows Audio Session API) Device Provider",
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"Source/Sink/Audio", "List WASAPI source and sink devices",
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"Nirbheek Chauhan <nirbheek@centricular.com>");
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}
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static void
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gst_wasapi_device_provider_init (GstWasapiDeviceProvider * self)
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{
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self->enumerator = gst_mm_device_enumerator_new ();
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}
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static gboolean
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gst_wasapi_device_provider_start (GstDeviceProvider * provider)
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{
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GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (provider);
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GstMMNotificationClientCallbacks callbacks = { NULL, };
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GList *devices = NULL;
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GList *iter;
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if (!self->enumerator) {
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GST_WARNING_OBJECT (self, "Enumerator wasn't configured");
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return FALSE;
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}
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callbacks.device_added = gst_wasapi_device_provider_device_added;
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callbacks.device_removed = gst_wasapi_device_provider_device_removed;
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callbacks.default_device_changed =
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gst_wasapi_device_provider_default_device_changed;
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if (!gst_mm_device_enumerator_set_notification_callback (self->enumerator,
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&callbacks, self)) {
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GST_WARNING_OBJECT (self, "Failed to set callbacks");
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return FALSE;
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}
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/* baseclass will not call probe() once it's started, but we can get
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* notification only add/remove or change case. To this manually */
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devices = gst_wasapi_device_provider_probe (provider);
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if (devices) {
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for (iter = devices; iter; iter = g_list_next (iter)) {
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gst_device_provider_device_add (provider, GST_DEVICE (iter->data));
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}
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g_list_free (devices);
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}
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return TRUE;
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}
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static void
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gst_wasapi_device_provider_stop (GstDeviceProvider * provider)
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{
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GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (provider);
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if (self->enumerator) {
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gst_mm_device_enumerator_set_notification_callback (self->enumerator,
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NULL, NULL);
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}
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}
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static void
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gst_wasapi_device_provider_finalize (GObject * object)
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{
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GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (object);
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gst_clear_object (&self->enumerator);
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G_OBJECT_CLASS (gst_wasapi_device_provider_parent_class)->finalize (object);
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}
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static GList *
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gst_wasapi_device_provider_probe (GstDeviceProvider * provider)
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{
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GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (provider);
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GList *devices = NULL;
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if (!gst_wasapi_util_get_devices (self->enumerator, TRUE, &devices))
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GST_ERROR_OBJECT (self, "Failed to enumerate devices");
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return devices;
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}
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static gboolean
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gst_wasapi_device_is_in_list (GList * list, GstDevice * device)
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{
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GList *iter;
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GstStructure *s;
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const gchar *device_id;
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gboolean found = FALSE;
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s = gst_device_get_properties (device);
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g_assert (s);
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device_id = gst_structure_get_string (s, "device.strid");
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g_assert (device_id);
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for (iter = list; iter; iter = g_list_next (iter)) {
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GstStructure *other_s;
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const gchar *other_id;
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other_s = gst_device_get_properties (GST_DEVICE (iter->data));
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g_assert (other_s);
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other_id = gst_structure_get_string (other_s, "device.strid");
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g_assert (other_id);
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if (g_ascii_strcasecmp (device_id, other_id) == 0) {
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found = TRUE;
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}
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gst_structure_free (other_s);
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if (found)
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break;
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}
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gst_structure_free (s);
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return found;
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}
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static void
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gst_wasapi_device_provider_update_devices (GstWasapiDeviceProvider * self)
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{
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GstDeviceProvider *provider = GST_DEVICE_PROVIDER_CAST (self);
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GList *prev_devices = NULL;
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GList *new_devices = NULL;
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GList *to_add = NULL;
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GList *to_remove = NULL;
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GList *iter;
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GST_OBJECT_LOCK (self);
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prev_devices = g_list_copy_deep (provider->devices,
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(GCopyFunc) gst_object_ref, NULL);
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GST_OBJECT_UNLOCK (self);
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new_devices = gst_wasapi_device_provider_probe (provider);
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/* Ownership of GstDevice for gst_device_provider_device_add()
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* and gst_device_provider_device_remove() is a bit complicated.
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* Remove floating reference here for things to be clear */
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for (iter = new_devices; iter; iter = g_list_next (iter))
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gst_object_ref_sink (iter->data);
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/* Check newly added devices */
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for (iter = new_devices; iter; iter = g_list_next (iter)) {
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if (!gst_wasapi_device_is_in_list (prev_devices, GST_DEVICE (iter->data))) {
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to_add = g_list_prepend (to_add, gst_object_ref (iter->data));
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}
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}
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/* Check removed device */
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for (iter = prev_devices; iter; iter = g_list_next (iter)) {
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if (!gst_wasapi_device_is_in_list (new_devices, GST_DEVICE (iter->data))) {
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to_remove = g_list_prepend (to_remove, gst_object_ref (iter->data));
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}
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}
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for (iter = to_remove; iter; iter = g_list_next (iter))
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gst_device_provider_device_remove (provider, GST_DEVICE (iter->data));
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for (iter = to_add; iter; iter = g_list_next (iter))
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gst_device_provider_device_add (provider, GST_DEVICE (iter->data));
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if (prev_devices)
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g_list_free_full (prev_devices, (GDestroyNotify) gst_object_unref);
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if (to_add)
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g_list_free_full (to_add, (GDestroyNotify) gst_object_unref);
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if (to_remove)
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g_list_free_full (to_remove, (GDestroyNotify) gst_object_unref);
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}
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static HRESULT
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gst_wasapi_device_provider_device_added (GstMMDeviceEnumerator * enumerator,
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LPCWSTR device_id, gpointer user_data)
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{
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GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (user_data);
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gst_wasapi_device_provider_update_devices (self);
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return S_OK;
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}
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static HRESULT
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gst_wasapi_device_provider_device_removed (GstMMDeviceEnumerator * enumerator,
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LPCWSTR device_id, gpointer user_data)
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{
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GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (user_data);
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gst_wasapi_device_provider_update_devices (self);
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return S_OK;
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}
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static HRESULT
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gst_wasapi_device_provider_default_device_changed (GstMMDeviceEnumerator *
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enumerator, EDataFlow flow, ERole role, LPCWSTR device_id,
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gpointer user_data)
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{
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GstWasapiDeviceProvider *self = GST_WASAPI_DEVICE_PROVIDER (user_data);
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gst_wasapi_device_provider_update_devices (self);
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return S_OK;
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}
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/* GstWasapiDevice begins */
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enum
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{
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PROP_DEVICE_STRID = 1,
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};
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G_DEFINE_TYPE (GstWasapiDevice, gst_wasapi_device, GST_TYPE_DEVICE);
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static void gst_wasapi_device_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static void gst_wasapi_device_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_wasapi_device_finalize (GObject * object);
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static GstElement *gst_wasapi_device_create_element (GstDevice * device,
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const gchar * name);
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static void
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gst_wasapi_device_class_init (GstWasapiDeviceClass * klass)
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{
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GstDeviceClass *dev_class = GST_DEVICE_CLASS (klass);
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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dev_class->create_element = gst_wasapi_device_create_element;
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object_class->get_property = gst_wasapi_device_get_property;
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object_class->set_property = gst_wasapi_device_set_property;
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object_class->finalize = gst_wasapi_device_finalize;
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g_object_class_install_property (object_class, PROP_DEVICE_STRID,
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g_param_spec_string ("device", "Device string ID",
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"Device strId", NULL,
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G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
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}
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static void
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gst_wasapi_device_init (GstWasapiDevice * device)
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{
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}
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static void
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gst_wasapi_device_finalize (GObject * object)
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{
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GstWasapiDevice *device = GST_WASAPI_DEVICE (object);
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g_free (device->strid);
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G_OBJECT_CLASS (gst_wasapi_device_parent_class)->finalize (object);
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}
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static GstElement *
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gst_wasapi_device_create_element (GstDevice * device, const gchar * name)
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{
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GstWasapiDevice *wasapi_dev = GST_WASAPI_DEVICE (device);
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GstElement *elem;
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elem = gst_element_factory_make (wasapi_dev->element, name);
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g_object_set (elem, "device", wasapi_dev->strid, NULL);
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return elem;
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}
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static void
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gst_wasapi_device_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstWasapiDevice *device = GST_WASAPI_DEVICE_CAST (object);
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switch (prop_id) {
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case PROP_DEVICE_STRID:
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g_value_set_string (value, device->strid);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_wasapi_device_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstWasapiDevice *device = GST_WASAPI_DEVICE_CAST (object);
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switch (prop_id) {
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case PROP_DEVICE_STRID:
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device->strid = g_value_dup_string (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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