content/browser/media/cdm/browser_cdm_manager.h

   1 // Copyright 2014 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 CONTENT_BROWSER_MEDIA_CDM_BROWSER_CDM_MANAGER_H_
   6 #define CONTENT_BROWSER_MEDIA_CDM_BROWSER_CDM_MANAGER_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/basictypes.h"
  13 #include "base/callback.h"
  14 #include "base/containers/scoped_ptr_hash_map.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "content/common/content_export.h"
  17 #include "content/common/media/cdm_messages_enums.h"
  18 #include "ipc/ipc_message.h"
  19 // TODO(xhwang): Drop this when KeyError is moved to a common header.
  20 #include "media/base/media_keys.h"
  21 #include "url/gurl.h"
  22
  23 namespace media {
  24 class BrowserCdm;
  25 }
  26
  27 namespace content {
  28
  29 class RenderFrameHost;
  30 class WebContents;
  31
  32 // This class manages all CDM objects. It receives control operations from the
  33 // the render process, and forwards them to corresponding CDM object. Callbacks
  34 // from CDM objects are converted to IPCs and then sent to the render process.
  35 class CONTENT_EXPORT BrowserCdmManager {
  36  public:
  37   // Creates a new BrowserCdmManager for |rfh|.
  38   static BrowserCdmManager* Create(RenderFrameHost* rfh);
  39
  40   ~BrowserCdmManager();
  41
  42   media::BrowserCdm* GetCdm(int cdm_id);
  43
  44   // CDM callbacks.
  45   void OnSessionCreated(int cdm_id,
  46                         uint32 session_id,
  47                         const std::string& web_session_id);
  48   void OnSessionMessage(int cdm_id,
  49                         uint32 session_id,
  50                         const std::vector<uint8>& message,
  51                         const GURL& destination_url);
  52   void OnSessionReady(int cdm_id, uint32 session_id);
  53   void OnSessionClosed(int cdm_id, uint32 session_id);
  54   void OnSessionError(int cdm_id,
  55                       uint32 session_id,
  56                       media::MediaKeys::KeyError error_code,
  57                       uint32 system_code);
  58
  59   // Message handlers.
  60   void OnInitializeCdm(int cdm_id,
  61                        const std::string& key_system,
  62                        const GURL& frame_url);
  63   void OnCreateSession(int cdm_id,
  64                        uint32 session_id,
  65                        CdmHostMsg_CreateSession_ContentType content_type,
  66                        const std::vector<uint8>& init_data);
  67   void OnUpdateSession(int cdm_id,
  68                        uint32 session_id,
  69                        const std::vector<uint8>& response);
  70   void OnReleaseSession(int cdm_id, uint32 session_id);
  71   void OnSetCdm(int player_id, int cdm_id);
  72   void OnDestroyCdm(int cdm_id);
  73
  74  private:
  75   // Clients must use Create() or subclass constructor.
  76   explicit BrowserCdmManager(RenderFrameHost* render_frame_host);
  77
  78   // Cancels all pending session creations associated with |cdm_id|.
  79   void CancelAllPendingSessionCreations(int cdm_id);
  80
  81   // Adds a new CDM identified by |cdm_id| for the given |key_system| and
  82   // |security_origin|.
  83   void AddCdm(int cdm_id,
  84               const std::string& key_system,
  85               const GURL& security_origin);
  86
  87   // Removes the CDM with the specified id.
  88   void RemoveCdm(int cdm_id);
  89
  90   int RoutingID();
  91
  92   // Helper function to send messages to RenderFrameObserver.
  93   bool Send(IPC::Message* msg);
  94
  95   // If |permitted| is false, it does nothing but send
  96   // |CdmMsg_SessionError| IPC message.
  97   // The primary use case is infobar permission callback, i.e., when infobar
  98   // can decide user's intention either from interacting with the actual info
  99   // bar or from the saved preference.
 100   void CreateSessionIfPermitted(int cdm_id,
 101                                 uint32 session_id,
 102                                 const std::string& content_type,
 103                                 const std::vector<uint8>& init_data,
 104                                 bool permitted);
 105
 106   RenderFrameHost* const render_frame_host_;
 107
 108   WebContents* const web_contents_;
 109
 110   // A map from CDM IDs to managed CDMs.
 111   typedef base::ScopedPtrHashMap<int, media::BrowserCdm> CdmMap;
 112   CdmMap cdm_map_;
 113
 114   // Map from CDM ID to CDM's security origin.
 115   std::map<int, GURL> cdm_security_origin_map_;
 116
 117   // Map from CDM ID to a callback to cancel the permission request.
 118   std::map<int, base::Closure> cdm_cancel_permision_map_;
 119
 120   // NOTE: Weak pointers must be invalidated before all other member variables.
 121   base::WeakPtrFactory<BrowserCdmManager> weak_ptr_factory_;
 122
 123   DISALLOW_COPY_AND_ASSIGN(BrowserCdmManager);
 124 };
 125
 126 }  // namespace content
 127
 128 #endif  // CONTENT_BROWSER_MEDIA_CDM_BROWSER_CDM_MANAGER_H_