media: Support creation and SetCdm() for mojo based CDM.

media/mojo/services/mojo_renderer_service.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_RENDERER_SERVICE_H_
 #define MEDIA_MOJO_SERVICES_MOJO_RENDERER_SERVICE_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/timer/timer.h"
 #include "media/base/audio_decoder_config.h"
 #include "media/base/buffering_state.h"
 #include "media/base/media_export.h"
 #include "media/base/pipeline_status.h"
 #include "media/mojo/interfaces/media_renderer.mojom.h"
 #include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
 
 namespace mojo {
 class ApplicationConnection;
 }
 
 namespace media {
 
 class AudioRendererSink;
 class DemuxerStreamProviderShim;
+class CdmContextProvider;
 class Renderer;
 class VideoRendererSink;
 
 // A mojo::MediaRenderer implementation that uses media::AudioRenderer to
 // decode and render audio to a sink obtained from the ApplicationConnection.
 class MEDIA_EXPORT MojoRendererService
     : NON_EXPORTED_BASE(mojo::MediaRenderer) {
  public:
-  explicit MojoRendererService(
-      mojo::InterfaceRequest<mojo::MediaRenderer> request);
-  ~MojoRendererService() override;
+  // |cdm_context_provider| can be used to find the CdmContext to support
+  // encrypted media. If null, encrypted media is not supported.
+  MojoRendererService(CdmContextProvider* cdm_context_provider,
+                      mojo::InterfaceRequest<mojo::MediaRenderer> request);
+  ~MojoRendererService() final;
 
   // mojo::MediaRenderer implementation.
   void Initialize(mojo::MediaRendererClientPtr client,
                   mojo::DemuxerStreamPtr audio,
                   mojo::DemuxerStreamPtr video,
-                  const mojo::Closure& callback) override;
-  void Flush(const mojo::Closure& callback) override;
-  void StartPlayingFrom(int64_t time_delta_usec) override;
-  void SetPlaybackRate(double playback_rate) override;
-  void SetVolume(float volume) override;
+                  const mojo::Closure& callback) final;
+  void Flush(const mojo::Closure& callback) final;
+  void StartPlayingFrom(int64_t time_delta_usec) final;
+  void SetPlaybackRate(double playback_rate) final;
+  void SetVolume(float volume) final;
+  void SetCdm(int32_t cdm_id, const mojo::Callback<void(bool)>& callback) final;
 
  private:
   enum State {
     STATE_UNINITIALIZED,
     STATE_INITIALIZING,
     STATE_FLUSHING,
     STATE_PLAYING,
     STATE_ERROR
   };
 
@@ skipping 21 matching lines @@
 
   // Callback executed when a renderer has ended.
   void OnRendererEnded();
 
   // Callback executed when a runtime error happens.
   void OnError(PipelineStatus error);
 
   // Callback executed once Flush() completes.
   void OnFlushCompleted(const mojo::Closure& callback);
 
+  // Callback executed once SetCdm() completes.
+  void OnCdmAttached(const mojo::Callback<void(bool)>& callback, bool success);
+
   mojo::StrongBinding<mojo::MediaRenderer> binding_;
 
+  CdmContextProvider* cdm_context_provider_;
+
   State state_;
 
   scoped_refptr<AudioRendererSink> audio_renderer_sink_;
   scoped_ptr<VideoRendererSink> video_renderer_sink_;
   scoped_ptr<Renderer> renderer_;
   scoped_ptr<DemuxerStreamProviderShim> stream_provider_;
 
   base::RepeatingTimer<MojoRendererService> time_update_timer_;
   uint64_t last_media_time_usec_;
 
   mojo::MediaRendererClientPtr client_;
 
   base::WeakPtr<MojoRendererService> weak_this_;
   base::WeakPtrFactory<MojoRendererService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoRendererService);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MOJO_SERVICES_MOJO_RENDERER_SERVICE_H_