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/****************************************************************************
**
** Copyright (c) 2012 The Chromium Authors. All rights reserved.
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWebEngine module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef MEDIA_CAPTURE_DEVICES_DISPATCHER_H
#define MEDIA_CAPTURE_DEVICES_DISPATCHER_H
#include "web_contents_adapter_client.h"
#include "base/callback.h"
#include "base/containers/circular_deque.h"
#include "base/containers/flat_map.h"
#include "base/memory/singleton.h"
#include "base/observer_list.h"
#include "chrome/browser/tab_contents/web_contents_collection.h"
#include "content/public/browser/media_observer.h"
#include "content/public/browser/web_contents_delegate.h"
namespace QtWebEngineCore {
// This singleton is used to receive updates about media events from the content
// layer. Based on Chrome's implementation.
class MediaCaptureDevicesDispatcher : public content::MediaObserver,
public WebContentsCollection::Observer
{
public:
static MediaCaptureDevicesDispatcher *GetInstance();
void processMediaAccessRequest(content::WebContents *, const content::MediaStreamRequest &, content::MediaResponseCallback);
// Called back from our WebContentsAdapter to grant the requested permission.
void handleMediaAccessPermissionResponse(content::WebContents *, const QUrl &securityOrigin, WebContentsAdapterClient::MediaRequestFlags);
private:
void getDefaultDevices(const std::string &audioDeviceId, const std::string &videoDeviceId, bool audio, bool video, blink::MediaStreamDevices *);
// Overridden from content::MediaObserver:
void OnAudioCaptureDevicesChanged() override {}
void OnVideoCaptureDevicesChanged() override {}
void OnMediaRequestStateChanged(int render_process_id,
int render_frame_id,
int page_request_id,
const GURL &security_origin,
blink::mojom::MediaStreamType stream_type,
content::MediaRequestState state) override;
void OnCreatingAudioStream(int /*render_process_id*/, int /*render_frame_id*/) override {}
void OnSetCapturingLinkSecured(int /*render_process_id*/,
int /*render_frame_id*/,
int /*page_request_id*/,
blink::mojom::MediaStreamType /*stream_type*/,
bool /*is_secure*/) override {}
friend struct base::DefaultSingletonTraits<MediaCaptureDevicesDispatcher>;
struct PendingAccessRequest {
PendingAccessRequest(const content::MediaStreamRequest &request, content::MediaResponseCallback callback);
~PendingAccessRequest();
content::MediaStreamRequest request;
content::MediaResponseCallback callback;
};
typedef base::circular_deque<std::unique_ptr<PendingAccessRequest>> RequestsQueue;
typedef base::flat_map<content::WebContents *, RequestsQueue> RequestsQueues;
MediaCaptureDevicesDispatcher();
virtual ~MediaCaptureDevicesDispatcher();
// WebContentsCollection::Observer:
void WebContentsDestroyed(content::WebContents *webContents) override;
// Helpers for ProcessMediaAccessRequest().
void processDesktopCaptureAccessRequest(content::WebContents *, const content::MediaStreamRequest &, content::MediaResponseCallback);
void enqueueMediaAccessRequest(content::WebContents *, const content::MediaStreamRequest &, content::MediaResponseCallback);
void ProcessQueuedAccessRequest(content::WebContents *);
// Called by the MediaObserver() functions, executed on UI thread.
void updateMediaRequestStateOnUIThread(int render_process_id, int render_frame_id, int page_request_id, const GURL &security_origin,
blink::mojom::MediaStreamType stream_type, content::MediaRequestState state);
RequestsQueues m_pendingRequests;
WebContentsCollection m_webContentsCollection;
bool m_loopbackAudioSupported = false;
};
} // namespace QtWebEngineCore
#endif // MEDIA_CAPTURE_DEVICES_DISPATCHER_H
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