Add Promises for EME (Chromium side)

content/renderer/media/crypto/ppapi_decryptor.h

 // Copyright 2013 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 CONTENT_RENDERER_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_
 #define CONTENT_RENDERER_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "content/renderer/media/crypto/pepper_cdm_wrapper.h"
 #include "media/base/decryptor.h"
 #include "media/base/media_keys.h"
+#include "media/base/media_keys_session_promise.h"
 #include "media/base/video_decoder_config.h"
 
 class GURL;
 
 namespace base {
 class MessageLoopProxy;
 }
 
 namespace content {
 class ContentDecryptorDelegate;
 class PepperPluginInstanceImpl;
 
 // PpapiDecryptor implements media::MediaKeys and media::Decryptor and forwards
 // all calls to the PluginInstance.
 // This class should always be created & destroyed on the main renderer thread.
 class PpapiDecryptor : public media::MediaKeys, public media::Decryptor {
  public:
   static scoped_ptr<PpapiDecryptor> Create(
       const std::string& key_system,
       const GURL& security_origin,
       const CreatePepperCdmCB& create_pepper_cdm_cb,
-      const media::SessionCreatedCB& session_created_cb,
       const media::SessionMessageCB& session_message_cb,
       const media::SessionReadyCB& session_ready_cb,
       const media::SessionClosedCB& session_closed_cb,
       const media::SessionErrorCB& session_error_cb);
 
   virtual ~PpapiDecryptor();
 
   // media::MediaKeys implementation.
-  virtual bool CreateSession(uint32 session_id,
-                             const std::string& content_type,
-                             const uint8* init_data,
-                             int init_data_length) OVERRIDE;
-  virtual void LoadSession(uint32 session_id,
-                           const std::string& web_session_id) OVERRIDE;
-  virtual void UpdateSession(uint32 session_id,
-                             const uint8* response,
-                             int response_length) OVERRIDE;
-  virtual void ReleaseSession(uint32 session_id) OVERRIDE;
+  virtual void CreateSession(
+      const std::string& init_data_type,
+      const uint8* init_data,
+      int init_data_length,
+      SessionType session_type,
+      scoped_ptr<media::MediaKeysSessionPromise> promise) OVERRIDE;
+  virtual void LoadSession(
+      const std::string& web_session_id,
+      scoped_ptr<media::MediaKeysSessionPromise> promise) OVERRIDE;
+  virtual void UpdateSession(
+      const std::string& web_session_id,
+      const uint8* response,
+      int response_length,
+      scoped_ptr<media::MediaKeysSessionPromise> promise) OVERRIDE;
+  virtual void ReleaseSession(
+      const std::string& web_session_id,
+      scoped_ptr<media::MediaKeysSessionPromise> promise) OVERRIDE;
   virtual Decryptor* GetDecryptor() OVERRIDE;
 
   // media::Decryptor implementation.
   virtual void RegisterNewKeyCB(StreamType stream_type,
                                 const NewKeyCB& key_added_cb) OVERRIDE;
   virtual void Decrypt(StreamType stream_type,
                        const scoped_refptr<media::DecoderBuffer>& encrypted,
                        const DecryptCB& decrypt_cb) OVERRIDE;
   virtual void CancelDecrypt(StreamType stream_type) OVERRIDE;
   virtual void InitializeAudioDecoder(const media::AudioDecoderConfig& config,
                                       const DecoderInitCB& init_cb) OVERRIDE;
   virtual void InitializeVideoDecoder(const media::VideoDecoderConfig& config,
                                       const DecoderInitCB& init_cb) OVERRIDE;
   virtual void DecryptAndDecodeAudio(
       const scoped_refptr<media::DecoderBuffer>& encrypted,
       const AudioDecodeCB& audio_decode_cb) OVERRIDE;
   virtual void DecryptAndDecodeVideo(
       const scoped_refptr<media::DecoderBuffer>& encrypted,
       const VideoDecodeCB& video_decode_cb) OVERRIDE;
   virtual void ResetDecoder(StreamType stream_type) OVERRIDE;
   virtual void DeinitializeDecoder(StreamType stream_type) OVERRIDE;
 
  private:
   PpapiDecryptor(const std::string& key_system,
                  scoped_ptr<PepperCdmWrapper> pepper_cdm_wrapper,
-                 const media::SessionCreatedCB& session_created_cb,
                  const media::SessionMessageCB& session_message_cb,
                  const media::SessionReadyCB& session_ready_cb,
                  const media::SessionClosedCB& session_closed_cb,
                  const media::SessionErrorCB& session_error_cb);
 
-  void ReportFailureToCallPlugin(uint32 session_id);
-
   void OnDecoderInitialized(StreamType stream_type, bool success);
 
   // Callbacks for |plugin_cdm_delegate_| to fire session events.
-  void OnSessionCreated(uint32 session_id, const std::string& web_session_id);
-  void OnSessionMessage(uint32 session_id,
+  void OnSessionMessage(const std::string& web_session_id,
                         const std::vector<uint8>& message,
                         const std::string& destination_url);
-  void OnSessionReady(uint32 session_id);
-  void OnSessionClosed(uint32 session_id);
-  void OnSessionError(uint32 session_id,
-                      media::MediaKeys::KeyError error_code,
-                      uint32 system_code);
+  void OnSessionReady(const std::string& web_session_id);
+  void OnSessionClosed(const std::string& web_session_id);
+  void OnSessionError(const std::string& web_session_id,
+                      const std::string& error_name,
+                      uint32 system_code,
+                      const std::string& error_description);
+
+  // On a successful Update() or SessionReady event, trigger playback to resume.
+  void ResumePlayback();
 
   // Callback to notify that a fatal error happened in |plugin_cdm_delegate_|.
   // The error is terminal and |plugin_cdm_delegate_| should not be used after
   // this call.
   void OnFatalPluginError();
 
   ContentDecryptorDelegate* CdmDelegate();
 
   // Hold a reference of the Pepper CDM wrapper to make sure the plugin lives
   // as long as needed.
   scoped_ptr<PepperCdmWrapper> pepper_cdm_wrapper_;
 
   // Callbacks for firing session events.
-  media::SessionCreatedCB session_created_cb_;
   media::SessionMessageCB session_message_cb_;
   media::SessionReadyCB session_ready_cb_;
   media::SessionClosedCB session_closed_cb_;
   media::SessionErrorCB session_error_cb_;
 
   scoped_refptr<base::MessageLoopProxy> render_loop_proxy_;
 
   DecoderInitCB audio_decoder_init_cb_;
   DecoderInitCB video_decoder_init_cb_;
   NewKeyCB new_audio_key_cb_;
   NewKeyCB new_video_key_cb_;
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<PpapiDecryptor> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PpapiDecryptor);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_CRYPTO_PPAPI_DECRYPTOR_H_