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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 "GStreamerVideoCaptureSource.h"
#include "PipeWireCaptureDevice.h"
#include <wtf/UUID.h>
#include <wtf/glib/GUniquePtr.h>
#include <wtf/text/MakeString.h>
namespace WebCore {
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, "Capture Screen"_s);
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()) {
auto& node = it->value;
PipeWireCaptureDevice pipewireCaptureDevice { *node, device.persistentId(), device.type(), device.label(), device.groupId() };
return GStreamerVideoCaptureSource::createPipewireSource(WTFMove(pipewireCaptureDevice), WTFMove(hashSalts), constraints);
}
if (!m_portal)
m_portal = DesktopPortalScreenCast::create();
if (!m_portal)
return CaptureSourceOrError({ { }, MediaAccessDenialReason::PermissionDenied });
auto session = m_portal->createScreencastSession();
if (!session)
return CaptureSourceOrError({ { }, MediaAccessDenialReason::PermissionDenied });
// FIXME: Maybe check this depending on device.type().
auto outputType = GStreamerDisplayCaptureDeviceManager::PipeWireOutputType::Monitor | GStreamerDisplayCaptureDeviceManager::PipeWireOutputType::Window;
GVariantBuilder options;
g_variant_builder_init(&options, G_VARIANT_TYPE_VARDICT);
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));
if (auto version = m_portal->getProperty("version")) {
if (g_variant_get_uint32(version.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));
}
}
auto result = session->selectSources(options);
if (!result)
return CaptureSourceOrError({ { }, MediaAccessDenialReason::PermissionDenied });
GUniqueOutPtr<char> objectPath;
g_variant_get(result.get(), "(o)", &objectPath.outPtr());
m_portal->waitResponseSignal(ASCIILiteral::fromLiteralUnsafe(objectPath.get()));
result = session->start();
if (!result)
return CaptureSourceOrError({ { }, MediaAccessDenialReason::PermissionDenied });
std::optional<uint32_t> nodeId;
g_variant_get(result.get(), "(o)", &objectPath.outPtr());
m_portal->waitResponseSignal(ASCIILiteral::fromLiteralUnsafe(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 });
}
auto nodeData = session->openPipewireRemote();
if (!nodeData)
return CaptureSourceOrError({ { }, MediaAccessDenialReason::PermissionDenied });
nodeData->objectId = *nodeId;
PipeWireCaptureDevice pipewireCaptureDevice { *nodeData, device.persistentId(), device.type(), device.label(), device.groupId() };
m_sessions.add(device.persistentId(), makeUnique<PipeWireNodeData>(WTFMove(*nodeData)));
return GStreamerVideoCaptureSource::createPipewireSource(WTFMove(pipewireCaptureDevice), WTFMove(hashSalts), constraints);
}
void GStreamerDisplayCaptureDeviceManager::stopSource(const String& persistentID)
{
if (!m_portal) [[unlikely]]
return;
auto session = m_sessions.take(persistentID);
m_portal->closeSession(session->path);
}
} // namespace WebCore
#endif // ENABLE(MEDIA_STREAM) && USE(GSTREAMER)
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