media/mojo/services/mojo_cdm.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 MEDIA_MOJO_SERVICES_MOJO_CDM_H_
   6 #define MEDIA_MOJO_SERVICES_MOJO_CDM_H_
   7
   8 #include <vector>
   9
  10 #include "base/macros.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "media/base/cdm_context.h"
  13 #include "media/base/cdm_initialized_promise.h"
  14 #include "media/base/media_keys.h"
  15 #include "media/mojo/interfaces/content_decryption_module.mojom.h"
  16 #include "media/mojo/services/mojo_type_trait.h"
  17
  18 namespace mojo {
  19 class ServiceProvider;
  20 }
  21
  22 namespace media {
  23
  24 // A MediaKeys that proxies to a interfaces::ContentDecryptionModule. That
  25 // interfaces::ContentDecryptionModule proxies back to the MojoCdm via the
  26 // interfaces::ContentDecryptionModuleClient interface.
  27 class MojoCdm : public MediaKeys,
  28                 public CdmContext,
  29                 public interfaces::ContentDecryptionModuleClient {
  30  public:
  31   static void Create(
  32       const std::string& key_system,
  33       const GURL& security_origin,
  34       const media::CdmConfig& cdm_config,
  35       interfaces::ContentDecryptionModulePtr remote_cdm,
  36       const media::SessionMessageCB& session_message_cb,
  37       const media::SessionClosedCB& session_closed_cb,
  38       const media::LegacySessionErrorCB& legacy_session_error_cb,
  39       const media::SessionKeysChangeCB& session_keys_change_cb,
  40       const media::SessionExpirationUpdateCB& session_expiration_update_cb,
  41       const media::CdmCreatedCB& cdm_created_cb);
  42
  43   ~MojoCdm() final;
  44
  45   // MediaKeys implementation.
  46   void SetServerCertificate(const std::vector<uint8_t>& certificate,
  47                             scoped_ptr<SimpleCdmPromise> promise) final;
  48   void CreateSessionAndGenerateRequest(
  49       SessionType session_type,
  50       EmeInitDataType init_data_type,
  51       const std::vector<uint8_t>& init_data,
  52       scoped_ptr<NewSessionCdmPromise> promise) final;
  53   void LoadSession(SessionType session_type,
  54                    const std::string& session_id,
  55                    scoped_ptr<NewSessionCdmPromise> promise) final;
  56   void UpdateSession(const std::string& session_id,
  57                      const std::vector<uint8_t>& response,
  58                      scoped_ptr<SimpleCdmPromise> promise) final;
  59   void CloseSession(const std::string& session_id,
  60                     scoped_ptr<SimpleCdmPromise> promise) final;
  61   void RemoveSession(const std::string& session_id,
  62                      scoped_ptr<SimpleCdmPromise> promise) final;
  63   CdmContext* GetCdmContext() final;
  64
  65   // CdmContext implementation.
  66   media::Decryptor* GetDecryptor() final;
  67   int GetCdmId() const final;
  68
  69  private:
  70   MojoCdm(interfaces::ContentDecryptionModulePtr remote_cdm,
  71           const SessionMessageCB& session_message_cb,
  72           const SessionClosedCB& session_closed_cb,
  73           const LegacySessionErrorCB& legacy_session_error_cb,
  74           const SessionKeysChangeCB& session_keys_change_cb,
  75           const SessionExpirationUpdateCB& session_expiration_update_cb);
  76
  77   void InitializeCdm(const std::string& key_system,
  78                      const GURL& security_origin,
  79                      const media::CdmConfig& cdm_config,
  80                      scoped_ptr<CdmInitializedPromise> promise);
  81
  82   // interfaces::ContentDecryptionModuleClient implementation.
  83   void OnSessionMessage(const mojo::String& session_id,
  84                         interfaces::CdmMessageType message_type,
  85                         mojo::Array<uint8_t> message,
  86                         const mojo::String& legacy_destination_url) final;
  87   void OnSessionClosed(const mojo::String& session_id) final;
  88   void OnLegacySessionError(const mojo::String& session_id,
  89                             interfaces::CdmException exception,
  90                             uint32_t system_code,
  91                             const mojo::String& error_message) final;
  92   void OnSessionKeysChange(
  93       const mojo::String& session_id,
  94       bool has_additional_usable_key,
  95       mojo::Array<interfaces::CdmKeyInformationPtr> keys_info) final;
  96   void OnSessionExpirationUpdate(const mojo::String& session_id,
  97                                  double new_expiry_time_sec) final;
  98
  99   // Callbacks to handle CDM promises.
 100   // We have to inline this method, since MS VS 2013 compiler fails to compile
 101   // it when this method is not inlined. It fails with error C2244
 102   // "unable to match function definition to an existing declaration".
 103   template <typename... T>
 104   void OnPromiseResult(scoped_ptr<CdmPromiseTemplate<T...>> promise,
 105                        interfaces::CdmPromiseResultPtr result,
 106                        typename MojoTypeTrait<T>::MojoType... args) {
 107     if (result->success)
 108       promise->resolve(args.template To<T>()...);  // See ISO C++03 14.2/4.
 109     else
 110       RejectPromise(promise.Pass(), result.Pass());
 111   }
 112
 113   static int next_cdm_id_;
 114
 115   interfaces::ContentDecryptionModulePtr remote_cdm_;
 116   mojo::Binding<ContentDecryptionModuleClient> binding_;
 117   int cdm_id_;
 118
 119   // Callbacks for firing session events.
 120   SessionMessageCB session_message_cb_;
 121   SessionClosedCB session_closed_cb_;
 122   LegacySessionErrorCB legacy_session_error_cb_;
 123   SessionKeysChangeCB session_keys_change_cb_;
 124   SessionExpirationUpdateCB session_expiration_update_cb_;
 125
 126   base::WeakPtrFactory<MojoCdm> weak_factory_;
 127
 128   DISALLOW_COPY_AND_ASSIGN(MojoCdm);
 129 };
 130
 131 }  // namespace media
 132
 133 #endif  // MEDIA_MOJO_SERVICES_MOJO_CDM_H_