Encrypted Media: Replace DecryptorClient with key event callbacks.

webkit/media/crypto/proxy_decryptor.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_MEDIA_CRYPTO_PROXY_DECRYPTOR_H_
 #define WEBKIT_MEDIA_CRYPTO_PROXY_DECRYPTOR_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "base/synchronization/lock.h"
 #include "media/base/decryptor.h"
 
 namespace media {
 class DecryptorClient;
 }
 
 namespace WebKit {
 class WebFrame;
 class WebMediaPlayerClient;
 }
 
 namespace webkit_media {
 
 // A decryptor proxy that creates a real decryptor object on demand and
 // forwards decryptor calls to it.
 // TODO(xhwang): Currently we don't support run-time switching among decryptor
 // objects. Fix this when needed.
 class ProxyDecryptor {
  public:
-  ProxyDecryptor(media::DecryptorClient* decryptor_client,
-                 WebKit::WebMediaPlayerClient* web_media_player_client,
-                 WebKit::WebFrame* web_frame);
+  ProxyDecryptor(WebKit::WebMediaPlayerClient* web_media_player_client,
+                 WebKit::WebFrame* web_frame,
+                 const media::KeyAddedCB& key_added_cb,
+                 const media::KeyErrorCB& key_error_cb,
+                 const media::KeyMessageCB& key_message_cb,
+                 const media::NeedKeyCB& need_key_cb);
   virtual ~ProxyDecryptor();
 
   // Requests the ProxyDecryptor to notify the decryptor when it's ready through
   // the |decryptor_ready_cb| provided.
   // If |decryptor_ready_cb| is null, the existing callback will be fired with
   // NULL immediately and reset.
   void SetDecryptorReadyCB(const media::DecryptorReadyCB& decryptor_ready_cb);
 
   bool GenerateKeyRequest(const std::string& key_system,
                           const std::string& type,
                           const uint8* init_data, int init_data_length);
   void AddKey(const std::string& key_system,
               const uint8* key, int key_length,
               const uint8* init_data, int init_data_length,
               const std::string& session_id);
   void CancelKeyRequest(const std::string& key_system,
                         const std::string& session_id);
 
  private:
   // Helper functions to create decryptors to handle the given |key_system|.
   scoped_ptr<media::Decryptor> CreatePpapiDecryptor(
       const std::string& key_system);
   scoped_ptr<media::Decryptor> CreateDecryptor(const std::string& key_system);
 
-  // DecryptorClient through which key events are fired.
-  media::DecryptorClient* client_;
+  // Callbacks for firing key events.
+  void KeyAdded(const std::string& key_system, const std::string& session_id);
+  void KeyError(const std::string& key_system,
+                const std::string& session_id,
+                media::Decryptor::KeyError error_code,
+                int system_code);
+  void KeyMessage(const std::string& key_system,
+                  const std::string& session_id,
+                  const std::string& message,
+                  const std::string& default_url);
+  void NeedKey(const std::string& key_system,
+               const std::string& session_id,
+               const std::string& type,
+               scoped_array<uint8> init_data, int init_data_size);
 
   // Needed to create the PpapiDecryptor.
   WebKit::WebMediaPlayerClient* web_media_player_client_;
   WebKit::WebFrame* web_frame_;
 
+  // Callbacks for firing key events.
+  media::KeyAddedCB key_added_cb_;
+  media::KeyErrorCB key_error_cb_;
+  media::KeyMessageCB key_message_cb_;
+  media::NeedKeyCB need_key_cb_;
+
   // Protects the |decryptor_|. Note that |decryptor_| itself should be thread
   // safe as per the Decryptor interface.
   base::Lock lock_;
 
   media::DecryptorReadyCB decryptor_ready_cb_;
 
   // The real decryptor that does decryption for the ProxyDecryptor.
   // This pointer is protected by the |lock_|.
   scoped_ptr<media::Decryptor> decryptor_;
 
+  base::WeakPtrFactory<ProxyDecryptor> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(ProxyDecryptor);
 };
 
 }  // namespace webkit_media
 
 #endif  // WEBKIT_MEDIA_CRYPTO_PROXY_DECRYPTOR_H_