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1 // Copyright (c) 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef MEDIA_BASE_ANDROID_MEDIA_DRM_PROXY_H_ | |
6 #define MEDIA_BASE_ANDROID_MEDIA_DRM_PROXY_H_ | |
7 | |
8 #include <string> | |
9 | |
10 #include "base/memory/scoped_ptr.h" | |
11 #include "base/memory/weak_ptr.h" | |
12 #include "media/base/android/media_drm_bridge.h" | |
13 #include "media/base/browser_cdm.h" | |
14 | |
15 namespace media { | |
16 | |
17 // This class delegates MediaDrmBridge calls onto the Media thread | |
18 class MEDIA_EXPORT MediaDrmProxy : public BrowserCdm { | |
19 public: | |
20 ~MediaDrmProxy() override; | |
21 void DeleteOnCorrectThread() override; | |
22 | |
23 // Returns a MediaDrmBridge instance if |key_system| is supported, or a NULL | |
24 // pointer otherwise. | |
25 // TODO(xhwang): Is it okay not to update session expiration info? | |
26 static scoped_ptr<MediaDrmProxy, BrowserCdmDeleter> Create( | |
27 const std::string& key_system, | |
28 MediaDrmBridge::SecurityLevel widevine_security_level, | |
29 const SessionMessageCB& session_message_cb, | |
30 const SessionClosedCB& session_closed_cb, | |
31 const LegacySessionErrorCB& legacy_session_error_cb, | |
32 const SessionKeysChangeCB& session_keys_change_cb, | |
33 const SessionExpirationUpdateCB& session_expiration_update_cb); | |
34 | |
35 // MediaKeys (via BrowserCdm) implementation. | |
36 | |
37 void SetServerCertificate( | |
38 const std::vector<uint8_t>& certificate, | |
39 scoped_ptr<media::SimpleCdmPromise> promise) override; | |
40 void CreateSessionAndGenerateRequest( | |
41 SessionType session_type, | |
42 media::EmeInitDataType init_data_type, | |
43 const std::vector<uint8_t>& init_data, | |
44 scoped_ptr<media::NewSessionCdmPromise> promise) override; | |
45 void LoadSession(SessionType session_type, | |
46 const std::string& session_id, | |
47 scoped_ptr<media::NewSessionCdmPromise> promise) override; | |
48 void UpdateSession(const std::string& session_id, | |
49 const std::vector<uint8_t>& response, | |
50 scoped_ptr<media::SimpleCdmPromise> promise) override; | |
51 void CloseSession(const std::string& session_id, | |
52 scoped_ptr<media::SimpleCdmPromise> promise) override; | |
53 void RemoveSession(const std::string& session_id, | |
54 scoped_ptr<media::SimpleCdmPromise> promise) override; | |
55 CdmContext* GetCdmContext() override; | |
56 | |
57 // PlayerTracker (via BrowserCdm) implementation. | |
58 | |
59 int RegisterPlayer(const base::Closure& new_key_cb, | |
60 const base::Closure& cdm_unset_cb) override; | |
61 void UnregisterPlayer(int registration_id) override; | |
62 | |
63 // Accessor for MediaDrmBridge | |
64 MediaDrmBridge* GetDrmBridge(); | |
65 | |
66 private: | |
67 MediaDrmProxy(const std::string& key_system, | |
68 MediaDrmBridge::SecurityLevel widevine_security_level, | |
69 const SessionMessageCB& session_message_cb, | |
70 const SessionClosedCB& session_closed_cb, | |
71 const LegacySessionErrorCB& legacy_session_error_cb, | |
72 const SessionKeysChangeCB& session_keys_change_cb, | |
73 const SessionExpirationUpdateCB& session_expiration_update_cb); | |
74 | |
75 // Helper method to create MediaDrmBridge on the Media thread. | |
76 void Initialize(); | |
77 | |
78 // Internal callbacks. | |
Tima Vaisburd
2015/09/15 23:48:56
The re-introduction of internal callbacks fixes th
| |
79 // We need to preserve the order of messages we send to the render process. | |
80 // Since we post the promise-related callbacks first from UI to Media thread | |
81 // and then back to UI thread, we need to do the same with session-related | |
82 // callbacks, too. | |
83 // We do this hopping with the promise-related callbacks to avoid a mutex in | |
84 // CdmPromiseAdapter, otherwise we could keep all callbacks on UI thread. | |
85 | |
86 void OnSessionMessage(const std::string& session_id, | |
87 MediaKeys::MessageType message_type, | |
88 const std::vector<uint8>& message, | |
89 const GURL& legacy_destination_url); | |
90 void OnSessionClosed(const std::string& session_id); | |
91 void OnLegacySessionError(const std::string& session_id, | |
92 MediaKeys::Exception exception_code, | |
93 uint32 system_code, | |
94 const std::string& error_message); | |
95 void OnSessionKeysChange(const std::string& session_id, | |
96 bool has_additional_usable_key, | |
97 CdmKeysInfo keys_info); | |
98 void OnSessionExpirationUpdate(const std::string& session_id, | |
99 const base::Time& new_expiry_time); | |
100 | |
101 // Data. | |
102 | |
103 // Object for posting tasks on UI thread. | |
104 scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_; | |
105 | |
106 // MediaDrmBridge that will be accessed on the Media thread. | |
107 scoped_ptr<MediaDrmBridge, BrowserCdmDeleter> media_drm_bridge_; | |
108 | |
109 // The key system. | |
110 std::string key_system_; | |
111 | |
112 // Required security level. Only makes sense for Widevine system. | |
113 MediaDrmBridge::SecurityLevel widevine_security_level_; | |
114 | |
115 // Callbacks received as parameters, to be called on UI thread | |
116 SessionMessageCB session_message_cb_; | |
117 SessionClosedCB session_closed_cb_; | |
118 LegacySessionErrorCB legacy_session_error_cb_; | |
119 SessionKeysChangeCB session_keys_change_cb_; | |
120 SessionExpirationUpdateCB session_expiration_update_cb_; | |
121 | |
122 // Internal callbacks passed to MediaDrmBridge, called on media thread. | |
123 SessionMessageCB internal_session_message_cb_; | |
124 SessionClosedCB internal_session_closed_cb_; | |
125 LegacySessionErrorCB internal_legacy_session_error_cb_; | |
126 SessionKeysChangeCB internal_session_keys_change_cb_; | |
127 SessionExpirationUpdateCB internal_session_expiration_update_cb_; | |
128 | |
129 base::WeakPtr<MediaDrmProxy> media_weak_this_; | |
130 | |
131 // NOTE: Weak pointers must be invalidated before all other member variables. | |
132 base::WeakPtrFactory<MediaDrmProxy> media_weak_factory_; | |
133 | |
134 DISALLOW_COPY_AND_ASSIGN(MediaDrmProxy); | |
135 }; | |
136 | |
137 } // namespace media | |
138 | |
139 #endif // MEDIA_BASE_ANDROID_MEDIA_DRM_PROXY_H_ | |
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