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/*
* Copyright (C) 2018 Metrological Group B.V.
* Author: Thibault Saunier <tsaunier@igalia.com>
* Author: Alejandro G. Castro <alex@igalia.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
* aint with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#if ENABLE(MEDIA_STREAM) && USE(GSTREAMER)
#include "GStreamerCaptureDeviceManager.h"
#include "GStreamerCommon.h"
#include "GStreamerVideoCaptureSource.h"
#include <gio/gunixfdlist.h>
#include <wtf/UUID.h>
namespace WebCore {
static const Seconds s_dbusCallTimeout = 10_ms;
GStreamerDisplayCaptureDeviceManager& GStreamerDisplayCaptureDeviceManager::singleton()
{
static NeverDestroyed<GStreamerDisplayCaptureDeviceManager> manager;
return manager;
}
GStreamerDisplayCaptureDeviceManager::GStreamerDisplayCaptureDeviceManager()
{
}
GStreamerDisplayCaptureDeviceManager::~GStreamerDisplayCaptureDeviceManager()
{
for (auto& sourceId : m_sessions.keys())
stopSource(sourceId);
}
void GStreamerDisplayCaptureDeviceManager::computeCaptureDevices(CompletionHandler<void()>&& callback)
{
m_devices.clear();
CaptureDevice screenCaptureDevice(createVersion4UUIDString(), CaptureDevice::DeviceType::Screen, makeString("Capture Screen"));
screenCaptureDevice.setEnabled(true);
m_devices.append(WTFMove(screenCaptureDevice));
callback();
}
CaptureSourceOrError GStreamerDisplayCaptureDeviceManager::createDisplayCaptureSource(const CaptureDevice& device, MediaDeviceHashSalts&& hashSalts, const MediaConstraints* constraints)
{
const auto it = m_sessions.find(device.persistentId());
if (it != m_sessions.end()) {
return GStreamerVideoCaptureSource::createPipewireSource(device.persistentId().isolatedCopy(),
it->value->nodeAndFd, WTFMove(hashSalts), constraints, device.type());
}
GUniqueOutPtr<GError> error;
m_proxy = adoptGRef(g_dbus_proxy_new_for_bus_sync(G_BUS_TYPE_SESSION,
static_cast<GDBusProxyFlags>(G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS | G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES), nullptr,
"org.freedesktop.portal.Desktop", "/org/freedesktop/portal/desktop", "org.freedesktop.portal.ScreenCast", nullptr, &error.outPtr()));
if (error) {
WTFLogAlways("Unable to connect to the Deskop portal: %s", error->message);
return CaptureSourceOrError({ { } , MediaAccessDenialReason::PermissionDenied });
}
auto token = makeString("WebKit", weakRandomNumber<uint32_t>());
auto sessionToken = makeString("WebKit", weakRandomNumber<uint32_t>());
GVariantBuilder options;
g_variant_builder_init(&options, G_VARIANT_TYPE_VARDICT);
g_variant_builder_add(&options, "{sv}", "handle_token", g_variant_new_string(token.ascii().data()));
g_variant_builder_add(&options, "{sv}", "session_handle_token", g_variant_new_string(sessionToken.ascii().data()));
auto result = adoptGRef(g_dbus_proxy_call_sync(m_proxy.get(), "CreateSession", g_variant_new("(a{sv})", &options),
G_DBUS_CALL_FLAGS_NONE, s_dbusCallTimeout.millisecondsAs<int>(), nullptr, &error.outPtr()));
if (error) {
WTFLogAlways("Unable to create a Deskop portal session: %s", error->message);
return CaptureSourceOrError({ { } , MediaAccessDenialReason::PermissionDenied });
}
GUniqueOutPtr<char> objectPath;
g_variant_get(result.get(), "(o)", &objectPath.outPtr());
waitResponseSignal(objectPath.get());
auto requestPath = String::fromLatin1(objectPath.get());
auto sessionPath = makeStringByReplacingAll(requestPath, "/request/"_s, "/session/"_s);
sessionPath = makeStringByReplacingAll(sessionPath, token, sessionToken);
// FIXME: Maybe check this depending on device.type().
auto outputType = GStreamerDisplayCaptureDeviceManager::PipeWireOutputType::Monitor | GStreamerDisplayCaptureDeviceManager::PipeWireOutputType::Window;
token = makeString("WebKit", weakRandomNumber<uint32_t>());
g_variant_builder_init(&options, G_VARIANT_TYPE_VARDICT);
g_variant_builder_add(&options, "{sv}", "handle_token", g_variant_new_string(token.ascii().data()));
g_variant_builder_add(&options, "{sv}", "types", g_variant_new_uint32(static_cast<uint32_t>(outputType)));
g_variant_builder_add(&options, "{sv}", "multiple", g_variant_new_boolean(false));
auto propertiesResult = adoptGRef(g_dbus_proxy_call_sync(m_proxy.get(), "org.freedesktop.DBus.Properties.Get",
g_variant_new("(ss)", "org.freedesktop.portal.ScreenCast", "version"), G_DBUS_CALL_FLAGS_NONE,
s_dbusCallTimeout.millisecondsAs<int>(), nullptr, nullptr));
if (propertiesResult) {
GRefPtr<GVariant> property;
g_variant_get(propertiesResult.get(), "(v)", &property.outPtr());
if (g_variant_get_uint32(property.get()) >= 2) {
// Enable embedded cursor. FIXME: Should be checked in the constraints.
g_variant_builder_add(&options, "{sv}", "cursor_mode", g_variant_new_uint32(2));
}
}
result = adoptGRef(g_dbus_proxy_call_sync(m_proxy.get(), "SelectSources",
g_variant_new("(oa{sv})", sessionPath.ascii().data(), &options), G_DBUS_CALL_FLAGS_NONE, s_dbusCallTimeout.millisecondsAs<int>(), nullptr, &error.outPtr()));
if (error) {
WTFLogAlways("SelectSources error: %s", error->message);
return CaptureSourceOrError({ { } , MediaAccessDenialReason::PermissionDenied });
}
g_variant_get(result.get(), "(o)", &objectPath.outPtr());
waitResponseSignal(objectPath.get());
token = makeString("WebKit", weakRandomNumber<uint32_t>());
g_variant_builder_init(&options, G_VARIANT_TYPE_VARDICT);
g_variant_builder_add(&options, "{sv}", "handle_token", g_variant_new_string(token.ascii().data()));
result = adoptGRef(g_dbus_proxy_call_sync(m_proxy.get(), "Start",
g_variant_new("(osa{sv})", sessionPath.ascii().data(), "", &options), G_DBUS_CALL_FLAGS_NONE, s_dbusCallTimeout.millisecondsAs<int>(), nullptr, &error.outPtr()));
if (error) {
WTFLogAlways("Start error: %s", error->message);
return CaptureSourceOrError({ { } , MediaAccessDenialReason::PermissionDenied });
}
std::optional<uint32_t> nodeId;
g_variant_get(result.get(), "(o)", &objectPath.outPtr());
waitResponseSignal(objectPath.get(), [&nodeId](GVariant* parameters) mutable {
uint32_t portalResponse;
GRefPtr<GVariant> responseData;
g_variant_get(parameters, "(u@a{sv})", &portalResponse, &responseData.outPtr());
if (portalResponse) {
WTFLogAlways("User cancelled the Start request or an unknown error happened");
return;
}
// The portal interface allows multiple streams but we care only about the first one.
GUniqueOutPtr<GVariantIter> iter;
if (g_variant_lookup(responseData.get(), "streams", "a(ua{sv})", &iter.outPtr())) {
auto variant = adoptGRef(g_variant_iter_next_value(iter.get()));
if (!variant) {
WTFLogAlways("Stream list is empty");
return;
}
uint32_t streamId;
GRefPtr<GVariant> options;
g_variant_get(variant.get(), "(u@a{sv})", &streamId, &options.outPtr());
nodeId = streamId;
}
});
if (!nodeId) {
WTFLogAlways("Unable to retrieve display capture session data");
return CaptureSourceOrError({ { } , MediaAccessDenialReason::PermissionDenied });
}
GRefPtr<GUnixFDList> fdList;
int fd = -1;
g_variant_builder_init(&options, G_VARIANT_TYPE_VARDICT);
result = adoptGRef(g_dbus_proxy_call_with_unix_fd_list_sync(m_proxy.get(), "OpenPipeWireRemote",
g_variant_new("(oa{sv})", sessionPath.ascii().data(), &options), G_DBUS_CALL_FLAGS_NONE, s_dbusCallTimeout.millisecondsAs<int>(), nullptr, &fdList.outPtr(), nullptr, &error.outPtr()));
if (error) {
WTFLogAlways("Unable to request display capture. Error: %s", error->message);
return CaptureSourceOrError({ { } , MediaAccessDenialReason::PermissionDenied });
}
int fdOut;
g_variant_get(result.get(), "(h)", &fdOut);
fd = g_unix_fd_list_get(fdList.get(), fdOut, nullptr);
NodeAndFD nodeAndFd = { *nodeId, fd };
auto session = makeUnique<GStreamerDisplayCaptureDeviceManager::Session>(nodeAndFd, WTFMove(sessionPath));
m_sessions.add(device.persistentId(), WTFMove(session));
return GStreamerVideoCaptureSource::createPipewireSource(device.persistentId().isolatedCopy(), nodeAndFd, WTFMove(hashSalts), constraints, device.type());
}
void GStreamerDisplayCaptureDeviceManager::stopSource(const String& persistentID)
{
auto session = m_sessions.take(persistentID);
GUniqueOutPtr<GError> error;
auto proxy = adoptGRef(g_dbus_proxy_new_for_bus_sync(G_BUS_TYPE_SESSION,
static_cast<GDBusProxyFlags>(G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS | G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES), nullptr,
"org.freedesktop.portal.Desktop", session->path.ascii().data(), "org.freedesktop.portal.Session", nullptr, &error.outPtr()));
if (error) {
WTFLogAlways("Unable to connect to the Deskop portal: %s", error->message);
return;
}
auto dbusCallTimeout = 100_ms;
auto result = adoptGRef(g_dbus_proxy_call_sync(proxy.get(), "Close", nullptr, G_DBUS_CALL_FLAGS_NONE,
dbusCallTimeout.millisecondsAs<int>(), nullptr, &error.outPtr()));
if (error)
WTFLogAlways("Portal session could not be closed: %s", error->message);
}
void GStreamerDisplayCaptureDeviceManager::waitResponseSignal(const char* objectPath, ResponseCallback&& callback)
{
RELEASE_ASSERT(!m_currentResponseCallback);
m_currentResponseCallback = WTFMove(callback);
auto* connection = g_dbus_proxy_get_connection(m_proxy.get());
auto signalId = g_dbus_connection_signal_subscribe(connection, "org.freedesktop.portal.Desktop", "org.freedesktop.portal.Request",
"Response", objectPath, nullptr, G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE, reinterpret_cast<GDBusSignalCallback>(+[](GDBusConnection*, const char* /* senderName */, const char* /* objectPath */, const char* /* interfaceName */, const char* /* signalName */, GVariant* parameters, gpointer userData) {
auto& manager = *reinterpret_cast<GStreamerDisplayCaptureDeviceManager*>(userData);
manager.notifyResponse(parameters);
}), this, nullptr);
while (m_currentResponseCallback)
g_main_context_iteration(nullptr, false);
g_dbus_connection_signal_unsubscribe(connection, signalId);
}
} // namespace WebCore
#endif // ENABLE(MEDIA_STREAM) && USE(GSTREAMER)
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