obs-studio/plugins/linux-pipewire/screencast-portal.c

/* screencast-portal.c
 *
 * Copyright 2022 Georges Basile Stavracas Neto <[email protected]>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "pipewire.h"
#include "portal.h"

#include <gio/gunixfdlist.h>

enum portal_capture_type {
	PORTAL_CAPTURE_TYPE_MONITOR = 1 << 0,
	PORTAL_CAPTURE_TYPE_WINDOW = 1 << 1,
	PORTAL_CAPTURE_TYPE_VIRTUAL = 1 << 2,
};

enum portal_cursor_mode {
	PORTAL_CURSOR_MODE_HIDDEN = 1 << 0,
	PORTAL_CURSOR_MODE_EMBEDDED = 1 << 1,
	PORTAL_CURSOR_MODE_METADATA = 1 << 2,
};

struct screencast_portal_capture {
	enum portal_capture_type capture_type;

	GCancellable *cancellable;

	char *session_handle;
	char *restore_token;

	obs_source_t *source;
	obs_data_t *settings;

	uint32_t pipewire_node;
	bool cursor_visible;

	obs_pipewire *obs_pw;
	obs_pipewire_stream *obs_pw_stream;
};

/* ------------------------------------------------- */

static GDBusProxy *screencast_proxy = NULL;

static void ensure_screencast_portal_proxy(void)
{
	g_autoptr(GError) error = NULL;
	if (!screencast_proxy) {
		screencast_proxy = g_dbus_proxy_new_sync(
			portal_get_dbus_connection(), G_DBUS_PROXY_FLAGS_NONE,
			NULL, "org.freedesktop.portal.Desktop",
			"/org/freedesktop/portal/desktop",
			"org.freedesktop.portal.ScreenCast", NULL, &error);

		if (error) {
			blog(LOG_WARNING,
			     "[portals] Error retrieving D-Bus proxy: %s",
			     error->message);
			return;
		}
	}
}

static GDBusProxy *get_screencast_portal_proxy(void)
{
	ensure_screencast_portal_proxy();
	return screencast_proxy;
}

static uint32_t get_available_capture_types(void)
{
	g_autoptr(GVariant) cached_source_types = NULL;
	uint32_t available_source_types;

	ensure_screencast_portal_proxy();

	if (!screencast_proxy)
		return 0;

	cached_source_types = g_dbus_proxy_get_cached_property(
		screencast_proxy, "AvailableSourceTypes");
	available_source_types =
		cached_source_types ? g_variant_get_uint32(cached_source_types)
				    : 0;

	return available_source_types;
}

static uint32_t get_available_cursor_modes(void)
{
	g_autoptr(GVariant) cached_cursor_modes = NULL;
	uint32_t available_cursor_modes;

	ensure_screencast_portal_proxy();

	if (!screencast_proxy)
		return 0;

	cached_cursor_modes = g_dbus_proxy_get_cached_property(
		screencast_proxy, "AvailableCursorModes");
	available_cursor_modes =
		cached_cursor_modes ? g_variant_get_uint32(cached_cursor_modes)
				    : 0;

	return available_cursor_modes;
}

static uint32_t get_screencast_version(void)
{
	g_autoptr(GVariant) cached_version = NULL;
	uint32_t version;

	ensure_screencast_portal_proxy();

	if (!screencast_proxy)
		return 0;

	cached_version =
		g_dbus_proxy_get_cached_property(screencast_proxy, "version");
	version = cached_version ? g_variant_get_uint32(cached_version) : 0;

	return version;
}

/* ------------------------------------------------- */

static const char *capture_type_to_string(enum portal_capture_type capture_type)
{
	switch (capture_type) {
	case PORTAL_CAPTURE_TYPE_MONITOR:
		return "desktop";
	case PORTAL_CAPTURE_TYPE_WINDOW:
		return "window";
	case PORTAL_CAPTURE_TYPE_VIRTUAL:
	default:
		return "unknown";
	}
	return "unknown";
}

/* ------------------------------------------------- */

static void on_pipewire_remote_opened_cb(GObject *source, GAsyncResult *res,
					 void *user_data)
{
	struct screencast_portal_capture *capture;
	g_autoptr(GUnixFDList) fd_list = NULL;
	g_autoptr(GVariant) result = NULL;
	g_autoptr(GError) error = NULL;
	int pipewire_fd;
	int fd_index;

	capture = user_data;
	result = g_dbus_proxy_call_with_unix_fd_list_finish(
		G_DBUS_PROXY(source), &fd_list, res, &error);
	if (error) {
		if (!g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
			blog(LOG_ERROR,
			     "[pipewire] Error retrieving pipewire fd: %s",
			     error->message);
		return;
	}

	g_variant_get(result, "(h)", &fd_index, &error);

	pipewire_fd = g_unix_fd_list_get(fd_list, fd_index, &error);
	if (error) {
		if (!g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
			blog(LOG_ERROR,
			     "[pipewire] Error retrieving pipewire fd: %s",
			     error->message);
		return;
	}

	capture->obs_pw = obs_pipewire_create(pipewire_fd);

	if (!capture->obs_pw)
		return;

	capture->obs_pw_stream = obs_pipewire_connect_stream(
		capture->obs_pw, capture->source, capture->pipewire_node,
		"OBS Studio",
		pw_properties_new(PW_KEY_MEDIA_TYPE, "Video",
				  PW_KEY_MEDIA_CATEGORY, "Capture",
				  PW_KEY_MEDIA_ROLE, "Screen", NULL));
	obs_pipewire_stream_set_cursor_visible(capture->obs_pw_stream,
					       capture->cursor_visible);
}

static void open_pipewire_remote(struct screencast_portal_capture *capture)
{
	GVariantBuilder builder;

	g_variant_builder_init(&builder, G_VARIANT_TYPE_VARDICT);

	g_dbus_proxy_call_with_unix_fd_list(
		get_screencast_portal_proxy(), "OpenPipeWireRemote",
		g_variant_new("(oa{sv})", capture->session_handle, &builder),
		G_DBUS_CALL_FLAGS_NONE, -1, NULL, capture->cancellable,
		on_pipewire_remote_opened_cb, capture);
}

/* ------------------------------------------------- */

static void on_start_response_received_cb(GVariant *parameters, void *user_data)
{
	struct screencast_portal_capture *capture = user_data;
	g_autoptr(GVariant) stream_properties = NULL;
	g_autoptr(GVariant) streams = NULL;
	g_autoptr(GVariant) result = NULL;
	GVariantIter iter;
	uint32_t response;
	size_t n_streams;

	g_variant_get(parameters, "(u@a{sv})", &response, &result);

	if (response != 0) {
		blog(LOG_WARNING,
		     "[pipewire] Failed to start screencast, denied or cancelled by user");
		return;
	}

	streams =
		g_variant_lookup_value(result, "streams", G_VARIANT_TYPE_ARRAY);

	g_variant_iter_init(&iter, streams);

	n_streams = g_variant_iter_n_children(&iter);
	if (n_streams != 1) {
		blog(LOG_WARNING,
		     "[pipewire] Received more than one stream when only one was expected. "
		     "This is probably a bug in the desktop portal implementation you are "
		     "using.");

		// The KDE Desktop portal implementation sometimes sends an invalid
		// response where more than one stream is attached, and only the
		// last one is the one we're looking for. This is the only known
		// buggy implementation, so let's at least try to make it work here.
		for (size_t i = 0; i < n_streams - 1; i++) {
			g_autoptr(GVariant) throwaway_properties = NULL;
			uint32_t throwaway_pipewire_node;

			g_variant_iter_loop(&iter, "(u@a{sv})",
					    &throwaway_pipewire_node,
					    &throwaway_properties);
		}
	}

	g_variant_iter_loop(&iter, "(u@a{sv})", &capture->pipewire_node,
			    &stream_properties);

	if (get_screencast_version() >= 4) {
		g_autoptr(GVariant) restore_token = NULL;

		g_clear_pointer(&capture->restore_token, bfree);

		restore_token = g_variant_lookup_value(result, "restore_token",
						       G_VARIANT_TYPE_STRING);
		if (restore_token)
			capture->restore_token = bstrdup(
				g_variant_get_string(restore_token, NULL));

		obs_source_save(capture->source);
	}

	blog(LOG_INFO, "[pipewire] %s selected, setting up screencast",
	     capture_type_to_string(capture->capture_type));

	open_pipewire_remote(capture);
}

static void on_started_cb(GObject *source, GAsyncResult *res, void *user_data)
{
	UNUSED_PARAMETER(user_data);

	g_autoptr(GVariant) result = NULL;
	g_autoptr(GError) error = NULL;

	result = g_dbus_proxy_call_finish(G_DBUS_PROXY(source), res, &error);
	if (error) {
		if (!g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
			blog(LOG_ERROR,
			     "[pipewire] Error selecting screencast source: %s",
			     error->message);
		return;
	}
}

static void start(struct screencast_portal_capture *capture)
{
	GVariantBuilder builder;
	char *request_token;
	char *request_path;

	portal_create_request_path(&request_path, &request_token);

	blog(LOG_INFO, "[pipewire] Asking for %s",
	     capture_type_to_string(capture->capture_type));

	portal_signal_subscribe(request_path, capture->cancellable,
				on_start_response_received_cb, capture);

	g_variant_builder_init(&builder, G_VARIANT_TYPE_VARDICT);
	g_variant_builder_add(&builder, "{sv}", "handle_token",
			      g_variant_new_string(request_token));

	g_dbus_proxy_call(get_screencast_portal_proxy(), "Start",
			  g_variant_new("(osa{sv})", capture->session_handle,
					"", &builder),
			  G_DBUS_CALL_FLAGS_NONE, -1, capture->cancellable,
			  on_started_cb, NULL);

	bfree(request_token);
	bfree(request_path);
}

/* ------------------------------------------------- */

static void on_select_source_response_received_cb(GVariant *parameters,
						  void *user_data)
{
	struct screencast_portal_capture *capture = user_data;
	g_autoptr(GVariant) ret = NULL;
	uint32_t response;

	blog(LOG_DEBUG, "[pipewire] Response to select source received");

	g_variant_get(parameters, "(u@a{sv})", &response, &ret);

	if (response != 0) {
		blog(LOG_WARNING,
		     "[pipewire] Failed to select source, denied or cancelled by user");
		return;
	}

	start(capture);
}

static void on_source_selected_cb(GObject *source, GAsyncResult *res,
				  void *user_data)
{
	UNUSED_PARAMETER(user_data);

	g_autoptr(GVariant) result = NULL;
	g_autoptr(GError) error = NULL;

	result = g_dbus_proxy_call_finish(G_DBUS_PROXY(source), res, &error);
	if (error) {
		if (!g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
			blog(LOG_ERROR,
			     "[pipewire] Error selecting screencast source: %s",
			     error->message);
		return;
	}
}

static void select_source(struct screencast_portal_capture *capture)
{
	GVariantBuilder builder;
	uint32_t available_cursor_modes;
	char *request_token;
	char *request_path;

	portal_create_request_path(&request_path, &request_token);

	portal_signal_subscribe(request_path, capture->cancellable,
				on_select_source_response_received_cb, capture);

	g_variant_builder_init(&builder, G_VARIANT_TYPE_VARDICT);
	g_variant_builder_add(&builder, "{sv}", "types",
			      g_variant_new_uint32(capture->capture_type));
	g_variant_builder_add(&builder, "{sv}", "multiple",
			      g_variant_new_boolean(FALSE));
	g_variant_builder_add(&builder, "{sv}", "handle_token",
			      g_variant_new_string(request_token));

	available_cursor_modes = get_available_cursor_modes();

	if (available_cursor_modes & PORTAL_CURSOR_MODE_METADATA)
		g_variant_builder_add(
			&builder, "{sv}", "cursor_mode",
			g_variant_new_uint32(PORTAL_CURSOR_MODE_METADATA));
	else if ((available_cursor_modes & PORTAL_CURSOR_MODE_EMBEDDED) &&
		 capture->cursor_visible)
		g_variant_builder_add(
			&builder, "{sv}", "cursor_mode",
			g_variant_new_uint32(PORTAL_CURSOR_MODE_EMBEDDED));
	else
		g_variant_builder_add(
			&builder, "{sv}", "cursor_mode",
			g_variant_new_uint32(PORTAL_CURSOR_MODE_HIDDEN));

	if (get_screencast_version() >= 4) {
		g_variant_builder_add(&builder, "{sv}", "persist_mode",
				      g_variant_new_uint32(2));
		if (capture->restore_token && *capture->restore_token) {
			g_variant_builder_add(
				&builder, "{sv}", "restore_token",
				g_variant_new_string(capture->restore_token));
		}
	}

	g_dbus_proxy_call(get_screencast_portal_proxy(), "SelectSources",
			  g_variant_new("(oa{sv})", capture->session_handle,
					&builder),
			  G_DBUS_CALL_FLAGS_NONE, -1, capture->cancellable,
			  on_source_selected_cb, NULL);

	bfree(request_token);
	bfree(request_path);
}

/* ------------------------------------------------- */

static void on_create_session_response_received_cb(GVariant *parameters,
						   void *user_data)
{
	struct screencast_portal_capture *capture = user_data;
	g_autoptr(GVariant) session_handle_variant = NULL;
	g_autoptr(GVariant) result = NULL;
	uint32_t response;

	g_variant_get(parameters, "(u@a{sv})", &response, &result);

	if (response != 0) {
		blog(LOG_WARNING,
		     "[pipewire] Failed to create session, denied or cancelled by user");
		return;
	}

	blog(LOG_INFO, "[pipewire] Screencast session created");

	session_handle_variant =
		g_variant_lookup_value(result, "session_handle", NULL);
	capture->session_handle =
		g_variant_dup_string(session_handle_variant, NULL);

	select_source(capture);
}

static void on_session_created_cb(GObject *source, GAsyncResult *res,
				  void *user_data)
{
	UNUSED_PARAMETER(user_data);

	g_autoptr(GVariant) result = NULL;
	g_autoptr(GError) error = NULL;

	result = g_dbus_proxy_call_finish(G_DBUS_PROXY(source), res, &error);
	if (error) {
		if (!g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
			blog(LOG_ERROR,
			     "[pipewire] Error creating screencast session: %s",
			     error->message);
		return;
	}
}

static void create_session(struct screencast_portal_capture *capture)
{
	GVariantBuilder builder;
	char *session_token;
	char *request_token;
	char *request_path;

	portal_create_request_path(&request_path, &request_token);
	portal_create_session_path(NULL, &session_token);

	portal_signal_subscribe(request_path, capture->cancellable,
				on_create_session_response_received_cb,
				capture);

	g_variant_builder_init(&builder, G_VARIANT_TYPE_VARDICT);
	g_variant_builder_add(&builder, "{sv}", "handle_token",
			      g_variant_new_string(request_token));
	g_variant_builder_add(&builder, "{sv}", "session_handle_token",
			      g_variant_new_string(session_token));

	g_dbus_proxy_call(get_screencast_portal_proxy(), "CreateSession",
			  g_variant_new("(a{sv})", &builder),
			  G_DBUS_CALL_FLAGS_NONE, -1, capture->cancellable,
			  on_session_created_cb, NULL);

	bfree(session_token);
	bfree(request_token);
	bfree(request_path);
}

/* ------------------------------------------------- */

static gboolean
init_screencast_capture(struct screencast_portal_capture *capture)
{
	GDBusConnection *connection;
	GDBusProxy *proxy;

	capture->cancellable = g_cancellable_new();
	connection = portal_get_dbus_connection();
	if (!connection)
		return FALSE;
	proxy = get_screencast_portal_proxy();
	if (!proxy)
		return FALSE;

	blog(LOG_INFO, "PipeWire initialized");

	create_session(capture);

	return TRUE;
}

static bool reload_session_cb(obs_properties_t *properties,
			      obs_property_t *property, void *data)
{
	UNUSED_PARAMETER(properties);
	UNUSED_PARAMETER(property);

	struct screencast_portal_capture *capture = data;

	g_clear_pointer(&capture->restore_token, bfree);
	g_clear_pointer(&capture->obs_pw_stream, obs_pipewire_stream_destroy);
	g_clear_pointer(&capture->obs_pw, obs_pipewire_destroy);

	if (capture->session_handle) {
		blog(LOG_DEBUG, "[pipewire] Cleaning previous session %s",
		     capture->session_handle);
		g_dbus_connection_call(portal_get_dbus_connection(),
				       "org.freedesktop.portal.Desktop",
				       capture->session_handle,
				       "org.freedesktop.portal.Session",
				       "Close", NULL, NULL,
				       G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL,
				       NULL);

		g_clear_pointer(&capture->session_handle, g_free);
	}

	init_screencast_capture(capture);

	return false;
}

/* obs_source_info methods */

static const char *screencast_portal_desktop_capture_get_name(void *data)
{
	UNUSED_PARAMETER(data);
	return obs_module_text("PipeWireDesktopCapture");
}

static const char *screencast_portal_window_capture_get_name(void *data)
{
	UNUSED_PARAMETER(data);
	return obs_module_text("PipeWireWindowCapture");
}

static void *screencast_portal_desktop_capture_create(obs_data_t *settings,
						      obs_source_t *source)
{
	struct screencast_portal_capture *capture;

	capture = bzalloc(sizeof(struct screencast_portal_capture));
	capture->capture_type = PORTAL_CAPTURE_TYPE_MONITOR;
	capture->cursor_visible = obs_data_get_bool(settings, "ShowCursor");
	capture->restore_token =
		bstrdup(obs_data_get_string(settings, "RestoreToken"));
	capture->source = source;

	init_screencast_capture(capture);

	return capture;
}
static void *screencast_portal_window_capture_create(obs_data_t *settings,
						     obs_source_t *source)
{
	struct screencast_portal_capture *capture;

	capture = bzalloc(sizeof(struct screencast_portal_capture));
	capture->capture_type = PORTAL_CAPTURE_TYPE_WINDOW;
	capture->cursor_visible = obs_data_get_bool(settings, "ShowCursor");
	capture->restore_token =
		bstrdup(obs_data_get_string(settings, "RestoreToken"));
	capture->source = source;

	init_screencast_capture(capture);

	return capture;
}

static void screencast_portal_capture_destroy(void *data)
{
	struct screencast_portal_capture *capture = data;

	if (!capture)
		return;

	if (capture->session_handle) {
		g_dbus_connection_call(portal_get_dbus_connection(),
				       "org.freedesktop.portal.Desktop",
				       capture->session_handle,
				       "org.freedesktop.portal.Session",
				       "Close", NULL, NULL,
				       G_DBUS_CALL_FLAGS_NONE, -1, NULL, NULL,
				       NULL);

		g_clear_pointer(&capture->session_handle, g_free);
	}

	g_clear_pointer(&capture->restore_token, bfree);

	g_clear_pointer(&capture->obs_pw_stream, obs_pipewire_stream_destroy);
	obs_pipewire_destroy(capture->obs_pw);
	g_cancellable_cancel(capture->cancellable);
	g_clear_object(&capture->cancellable);
	bfree(capture);
}

static void screencast_portal_capture_save(void *data, obs_data_t *settings)
{
	struct screencast_portal_capture *capture = data;

	obs_data_set_string(settings, "RestoreToken", capture->restore_token);
}

static void screencast_portal_capture_get_defaults(obs_data_t *settings)
{
	obs_data_set_default_bool(settings, "ShowCursor", true);
	obs_data_set_default_string(settings, "RestoreToken", NULL);
}

static obs_properties_t *screencast_portal_capture_get_properties(void *data)
{
	struct screencast_portal_capture *capture = data;
	const char *reload_string_id;
	obs_properties_t *properties;

	switch (capture->capture_type) {
	case PORTAL_CAPTURE_TYPE_MONITOR:
		reload_string_id = "PipeWireSelectMonitor";
		break;
	case PORTAL_CAPTURE_TYPE_WINDOW:
		reload_string_id = "PipeWireSelectWindow";
		break;
	case PORTAL_CAPTURE_TYPE_VIRTUAL:
	default:
		return NULL;
	}

	properties = obs_properties_create();
	obs_properties_add_button2(properties, "Reload",
				   obs_module_text(reload_string_id),
				   reload_session_cb, capture);
	obs_properties_add_bool(properties, "ShowCursor",
				obs_module_text("ShowCursor"));

	return properties;
}

static void screencast_portal_capture_update(void *data, obs_data_t *settings)
{
	struct screencast_portal_capture *capture = data;

	capture->cursor_visible = obs_data_get_bool(settings, "ShowCursor");

	if (capture->obs_pw_stream)
		obs_pipewire_stream_set_cursor_visible(capture->obs_pw_stream,
						       capture->cursor_visible);
}

static void screencast_portal_capture_show(void *data)
{
	struct screencast_portal_capture *capture = data;

	if (capture->obs_pw_stream)
		obs_pipewire_stream_show(capture->obs_pw_stream);
}

static void screencast_portal_capture_hide(void *data)
{
	struct screencast_portal_capture *capture = data;

	if (capture->obs_pw_stream)
		obs_pipewire_stream_hide(capture->obs_pw_stream);
}

static uint32_t screencast_portal_capture_get_width(void *data)
{
	struct screencast_portal_capture *capture = data;

	if (capture->obs_pw_stream)
		return obs_pipewire_stream_get_width(capture->obs_pw_stream);
	else
		return 0;
}

static uint32_t screencast_portal_capture_get_height(void *data)
{
	struct screencast_portal_capture *capture = data;

	if (capture->obs_pw_stream)
		return obs_pipewire_stream_get_height(capture->obs_pw_stream);
	else
		return 0;
}

static void screencast_portal_capture_video_render(void *data,
						   gs_effect_t *effect)
{
	struct screencast_portal_capture *capture = data;

	if (capture->obs_pw_stream)
		obs_pipewire_stream_video_render(capture->obs_pw_stream,
						 effect);
}

void screencast_portal_load(void)
{
	uint32_t available_capture_types = get_available_capture_types();
	bool desktop_capture_available =
		(available_capture_types & PORTAL_CAPTURE_TYPE_MONITOR) != 0;
	bool window_capture_available =
		(available_capture_types & PORTAL_CAPTURE_TYPE_WINDOW) != 0;

	if (available_capture_types == 0) {
		blog(LOG_INFO, "[pipewire] No captures available");
		return;
	}

	blog(LOG_INFO, "[pipewire] Available captures:");
	if (desktop_capture_available)
		blog(LOG_INFO, "[pipewire]     - Desktop capture");
	if (window_capture_available)
		blog(LOG_INFO, "[pipewire]     - Window capture");

	// Desktop capture
	const struct obs_source_info screencast_portal_desktop_capture_info = {
		.id = "pipewire-desktop-capture-source",
		.type = OBS_SOURCE_TYPE_INPUT,
		.output_flags = OBS_SOURCE_VIDEO,
		.get_name = screencast_portal_desktop_capture_get_name,
		.create = screencast_portal_desktop_capture_create,
		.destroy = screencast_portal_capture_destroy,
		.save = screencast_portal_capture_save,
		.get_defaults = screencast_portal_capture_get_defaults,
		.get_properties = screencast_portal_capture_get_properties,
		.update = screencast_portal_capture_update,
		.show = screencast_portal_capture_show,
		.hide = screencast_portal_capture_hide,
		.get_width = screencast_portal_capture_get_width,
		.get_height = screencast_portal_capture_get_height,
		.video_render = screencast_portal_capture_video_render,
		.icon_type = OBS_ICON_TYPE_DESKTOP_CAPTURE,
	};
	if (desktop_capture_available)
		obs_register_source(&screencast_portal_desktop_capture_info);

	// Window capture
	const struct obs_source_info screencast_portal_window_capture_info = {
		.id = "pipewire-window-capture-source",
		.type = OBS_SOURCE_TYPE_INPUT,
		.output_flags = OBS_SOURCE_VIDEO,
		.get_name = screencast_portal_window_capture_get_name,
		.create = screencast_portal_window_capture_create,
		.destroy = screencast_portal_capture_destroy,
		.save = screencast_portal_capture_save,
		.get_defaults = screencast_portal_capture_get_defaults,
		.get_properties = screencast_portal_capture_get_properties,
		.update = screencast_portal_capture_update,
		.show = screencast_portal_capture_show,
		.hide = screencast_portal_capture_hide,
		.get_width = screencast_portal_capture_get_width,
		.get_height = screencast_portal_capture_get_height,
		.video_render = screencast_portal_capture_video_render,
		.icon_type = OBS_ICON_TYPE_WINDOW_CAPTURE,
	};
	if (window_capture_available)
		obs_register_source(&screencast_portal_window_capture_info);
}

void screencast_portal_unload(void)
{
	g_clear_object(&screencast_proxy);
}