Add Decryptor interface.

media/crypto/aes_decryptor.cc

 // 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.
 
 #include "media/crypto/aes_decryptor.h"
 
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
 #include "base/string_piece.h"
@@ skipping 35 matching lines @@
     return NULL;
   }
 
   // TODO(xhwang): Find a way to avoid this data copy.
   return DecoderBuffer::CopyFrom(
       reinterpret_cast<const uint8*>(decrypted_text.data()),
       decrypted_text.size());
 }
 
 AesDecryptor::AesDecryptor(DecryptorClient* client)
-    : client_(client) {
+    : Decryptor(client) {
 }
 
 AesDecryptor::~AesDecryptor() {
   STLDeleteValues(&key_map_);
 }
 
 void AesDecryptor::GenerateKeyRequest(const std::string& key_system,
                                       const uint8* init_data,
                                       int init_data_length) {
   std::string session_id_string(base::UintToString(next_session_id_++));
 
   // For now, just fire the event with the |init_data| as the request.
   int message_length = init_data_length;
   scoped_array<uint8> message(new uint8[message_length]);
   memcpy(message.get(), init_data, message_length);
 
-  client_->KeyMessage(key_system, session_id_string,
-                      message.Pass(), message_length, "");
+  client()->KeyMessage(key_system, session_id_string,
+                       message.Pass(), message_length, "");
 }
 
 void AesDecryptor::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) {
   CHECK(key);
   CHECK_GT(key_length, 0);
 
   // TODO(xhwang): Add |session_id| check after we figure out how:
   // https://www.w3.org/Bugs/Public/show_bug.cgi?id=16550
 
   const int kSupportedKeyLength = 16;  // 128-bit key.
   if (key_length != kSupportedKeyLength) {
     DVLOG(1) << "Invalid key length: " << key_length;
-    client_->KeyError(key_system, session_id, kUnknownError, 0);
+    client()->KeyError(key_system, session_id, Decryptor::kUnknownError, 0);
     return;
   }
 
   // TODO(xhwang): Fix the decryptor to accept no |init_data|. See
   // http://crbug.com/123265. Until then, ensure a non-empty value is passed.
   static const uint8 kDummyInitData[1] = { 0 };
   if (!init_data) {
     init_data = kDummyInitData;
     init_data_length = arraysize(kDummyInitData);
   }
 
   // TODO(xhwang): For now, use |init_data| for key ID. Make this more spec
   // compliant later (http://crbug.com/123262, http://crbug.com/123265).
   std::string key_id_string(reinterpret_cast<const char*>(init_data),
                             init_data_length);
   std::string key_string(reinterpret_cast<const char*>(key) , key_length);
   crypto::SymmetricKey* symmetric_key = crypto::SymmetricKey::Import(
       crypto::SymmetricKey::AES, key_string);
   if (!symmetric_key) {
     DVLOG(1) << "Could not import key.";
-    client_->KeyError(key_system, session_id, kUnknownError, 0);
+    client()->KeyError(key_system, session_id, Decryptor::kUnknownError, 0);
     return;
   }
 
   {
     base::AutoLock auto_lock(key_map_lock_);
     KeyMap::iterator found = key_map_.find(key_id_string);
     if (found != key_map_.end()) {
       delete found->second;
       key_map_.erase(found);
     }
     key_map_[key_id_string] = symmetric_key;
   }
 
-  client_->KeyAdded(key_system, session_id);
+  client()->KeyAdded(key_system, session_id);
 }
 
 void AesDecryptor::CancelKeyRequest(const std::string& key_system,
                                     const std::string& session_id) {
 }
 
 scoped_refptr<DecoderBuffer> AesDecryptor::Decrypt(
     const scoped_refptr<DecoderBuffer>& encrypted) {
   CHECK(encrypted->GetDecryptConfig());
   const uint8* key_id = encrypted->GetDecryptConfig()->key_id();
@@ skipping 17 matching lines @@
 
   if (decrypted) {
     decrypted->SetTimestamp(encrypted->GetTimestamp());
     decrypted->SetDuration(encrypted->GetDuration());
   }
 
   return decrypted;
 }
 
 }  // namespace media