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chromium / chromium / src / d3e50fa12dc72c53b92d5b8f5da24ec8e67760ef / . / components / media_device_salt / media_device_id_salt.h
blob: 2321b24a72b92b012279f5066a14729335398eb6 [file] [log] [blame]
Avi Drissman4a8573c2022-09-09 19:35:54[diff] [blame]1// Copyright 2013 The Chromium Authors
perkj@chromium.orgcd80cce2013-12-02 15:19:19[diff] [blame]2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
Guido Urdaneta9f831c22023-06-22 13:44:34[diff] [blame]5#ifndef COMPONENTS_MEDIA_DEVICE_SALT_MEDIA_DEVICE_ID_SALT_H_
6#define COMPONENTS_MEDIA_DEVICE_SALT_MEDIA_DEVICE_ID_SALT_H_
perkj@chromium.orgcd80cce2013-12-02 15:19:19[diff] [blame]7
8#include <string>
9
joi@chromium.orgf9583f82014-02-13 15:34:21[diff] [blame]10#include "base/memory/ref_counted.h"
tfarina@chromium.orgf0c8c4992014-05-15 17:37:26[diff] [blame]11#include "components/pref_registry/pref_registry_syncable.h"
brettwb1fc1b82016-02-02 00:19:08[diff] [blame]12#include "components/prefs/pref_member.h"
perkj@chromium.orgcd80cce2013-12-02 15:19:19[diff] [blame]13
14class PrefService;
15
Guido Urdaneta9f831c22023-06-22 13:44:34[diff] [blame]16namespace media_device_salt {
17
18namespace prefs {
19extern const char kMediaDeviceIdSalt[];
20}
21
perkj@chromium.orgcd80cce2013-12-02 15:19:19[diff] [blame]22// MediaDeviceIDSalt is responsible for creating and retrieving a salt string
23// that is used for creating MediaSource IDs that can be cached by a web
24// service. If the cache is cleared, the MediaSourceIds are invalidated.
joi@chromium.orgf9583f82014-02-13 15:34:21[diff] [blame]25//
26// The class is reference counted so that it can be used in the
27// callback returned by ResourceContext::GetMediaDeviceIDSalt.
28class MediaDeviceIDSalt : public base::RefCountedThreadSafe<MediaDeviceIDSalt> {
perkj@chromium.orgcd80cce2013-12-02 15:19:19[diff] [blame]29 public:
guidou91768ed2016-06-15 15:49:51[diff] [blame]30 explicit MediaDeviceIDSalt(PrefService* pref_service);
perkj@chromium.orgcd80cce2013-12-02 15:19:19[diff] [blame]31
Peter Boströmfadb1752021-09-30 19:17:01[diff] [blame]32 MediaDeviceIDSalt(const MediaDeviceIDSalt&) = delete;
33 MediaDeviceIDSalt& operator=(const MediaDeviceIDSalt&) = delete;
34
perkj@chromium.orgcd80cce2013-12-02 15:19:19[diff] [blame]35 static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
Guido Urdaneta9f831c22023-06-22 13:44:34[diff] [blame]36
37 std::string GetSalt() const;
perkj@chromium.orgcd80cce2013-12-02 15:19:19[diff] [blame]38 static void Reset(PrefService* pref_service);
39
40 private:
joi@chromium.orgf9583f82014-02-13 15:34:21[diff] [blame]41 friend class base::RefCountedThreadSafe<MediaDeviceIDSalt>;
42 ~MediaDeviceIDSalt();
43
perkj@chromium.orgcd80cce2013-12-02 15:19:19[diff] [blame]44 mutable StringPrefMember media_device_id_salt_;
perkj@chromium.orgcd80cce2013-12-02 15:19:19[diff] [blame]45};
46
Guido Urdaneta9f831c22023-06-22 13:44:34[diff] [blame]47} // namespace media_device_salt
48
49#endif // COMPONENTS_MEDIA_DEVICE_SALT_MEDIA_DEVICE_ID_SALT_H_