Add Mojo CDM Service.

media/mojo/services/mojo_cdm.h

+// Copyright 2014 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 MEDIA_MOJO_SERVICES_MOJO_CDM_H_
+#define MEDIA_MOJO_SERVICES_MOJO_CDM_H_
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "media/base/media_keys.h"
+#include "media/mojo/interfaces/content_decryption_module.mojom.h"
+#include "media/mojo/services/mojo_type_trait.h"
+
+namespace mojo {
+class ServiceProvider;
+}
+
+namespace media {
+
+// A MediaKeys that proxies to a mojo::ContentDecryptionModule. That
+// mojo::ContentDecryptionModule proxies back to the MojoCdm via the
+// mojo::ContentDecryptionModuleClient interface.
+class MojoCdm : public MediaKeys, public mojo::ContentDecryptionModuleClient {
+ public:
+  // |media_renderer_provider| is a ServiceProvider from a connected
+  //     Application that is hosting a mojo::MediaRenderer.
+  MojoCdm(mojo::ContentDecryptionModulePtr remote_cdm,
+          const SessionMessageCB& session_message_cb,
+          const SessionReadyCB& session_ready_cb,
+          const SessionClosedCB& session_closed_cb,
+          const SessionErrorCB& session_error_cb,
+          const SessionKeysChangeCB& session_keys_change_cb,
+          const SessionExpirationUpdateCB& session_expiration_update_cb);
+  ~MojoCdm() final;
+
+  // MediaKeys implementation.
+  void SetServerCertificate(const uint8* certificate_data,
+                            int certificate_data_length,
+                            scoped_ptr<SimpleCdmPromise> promise) final;
+  void CreateSession(const std::string& init_data_type,
+                     const uint8* init_data,
+                     int init_data_length,
+                     SessionType session_type,
+                     scoped_ptr<NewSessionCdmPromise> promise) final;
+  void LoadSession(const std::string& session_id,
+                   scoped_ptr<NewSessionCdmPromise> promise) final;
+  void UpdateSession(const std::string& session_id,
+                     const uint8* response,
+                     int response_length,
+                     scoped_ptr<SimpleCdmPromise> promise) final;
+  void CloseSession(const std::string& session_id,
+                    scoped_ptr<SimpleCdmPromise> promise) final;
+  void RemoveSession(const std::string& session_id,
+                     scoped_ptr<SimpleCdmPromise> promise) final;
+  void GetUsableKeyIds(const std::string& session_id,
+                       scoped_ptr<KeyIdsPromise> promise) final;
+  CdmContext* GetCdmContext() final;
+
+ private:
+  // mojo::ContentDecryptionModuleClient implementation.
+  void OnSessionMessage(const mojo::String& session_id,
+                        mojo::Array<uint8_t> message,
+                        const mojo::String& destination_url) final;
+  void OnSessionReady(const mojo::String& session_id) final;
+  void OnSessionClosed(const mojo::String& session_id) final;
+  void OnSessionError(const mojo::String& session_id,
+                      mojo::CdmException exception,
+                      uint32_t system_code,
+                      const mojo::String& error_message) final;
+  void OnSessionKeysChange(const mojo::String& session_id,
+                           bool has_additional_usable_key) final;
+  void OnSessionExpirationUpdate(const mojo::String& session_id,
+                                 int64_t new_expiry_time_usec) final;
+
+  // Callbacks to handle CDM promises.
+  template <typename... T>
+  void OnResponse(scoped_ptr<CdmPromiseTemplate<T...>> promise,

[ddorwin, 2014/12/12 19:25:13]

"Response" could be misleading since this handles other calls. Maybe
OnPromiseResolved or OnOperationComplete/Success.

[xhwang, 2014/12/12 23:15:44]

Done.

+                  mojo::CdmPromiseResultPtr result,
+                  typename MojoTypeTrait<T>::MojoType... args);
+
+  mojo::ContentDecryptionModulePtr remote_cdm_;
+
+  // Callbacks for firing session events.
+  SessionMessageCB session_message_cb_;
+  SessionReadyCB session_ready_cb_;
+  SessionClosedCB session_closed_cb_;
+  SessionErrorCB session_error_cb_;
+  SessionKeysChangeCB session_keys_change_cb_;
+  SessionExpirationUpdateCB session_expiration_update_cb_;
+
+  base::WeakPtrFactory<MojoCdm> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(MojoCdm);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_MOJO_SERVICES_MOJO_CDM_H_