media/mojo/services/mojo_renderer_service.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_RENDERER_SERVICE_H_
   6 #define MEDIA_MOJO_SERVICES_MOJO_RENDERER_SERVICE_H_
   7
   8 #include "base/callback.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/macros.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "base/timer/timer.h"
  14 #include "media/base/audio_decoder_config.h"
  15 #include "media/base/buffering_state.h"
  16 #include "media/base/media_export.h"
  17 #include "media/base/pipeline_status.h"
  18 #include "media/mojo/interfaces/renderer.mojom.h"
  19 #include "media/mojo/services/mojo_cdm_service_context.h"
  20 #include "third_party/mojo/src/mojo/public/cpp/bindings/strong_binding.h"
  21
  22 namespace mojo {
  23 class ApplicationConnection;
  24 }
  25
  26 namespace media {
  27
  28 class AudioRendererSink;
  29 class DemuxerStreamProviderShim;
  30 class CdmContextProvider;
  31 class MediaLog;
  32 class Renderer;
  33 class RendererFactory;
  34 class VideoRendererSink;
  35
  36 // A interfaces::Renderer implementation that uses media::AudioRenderer to
  37 // decode and render audio to a sink obtained from the ApplicationConnection.
  38 class MEDIA_EXPORT MojoRendererService
  39     : NON_EXPORTED_BASE(interfaces::Renderer) {
  40  public:
  41   // |cdm_context_provider| can be used to find the CdmContext to support
  42   // encrypted media. If null, encrypted media is not supported.
  43   MojoRendererService(base::WeakPtr<CdmContextProvider> cdm_context_provider,
  44                       RendererFactory* renderer_factory,
  45                       const scoped_refptr<MediaLog>& media_log,
  46                       mojo::InterfaceRequest<interfaces::Renderer> request);
  47   ~MojoRendererService() final;
  48
  49   // interfaces::Renderer implementation.
  50   void Initialize(interfaces::RendererClientPtr client,
  51                   interfaces::DemuxerStreamPtr audio,
  52                   interfaces::DemuxerStreamPtr video,
  53                   const mojo::Callback<void(bool)>& callback) final;
  54   void Flush(const mojo::Closure& callback) final;
  55   void StartPlayingFrom(int64_t time_delta_usec) final;
  56   void SetPlaybackRate(double playback_rate) final;
  57   void SetVolume(float volume) final;
  58   void SetCdm(int32_t cdm_id, const mojo::Callback<void(bool)>& callback) final;
  59
  60  private:
  61   enum State {
  62     STATE_UNINITIALIZED,
  63     STATE_INITIALIZING,
  64     STATE_FLUSHING,
  65     STATE_PLAYING,
  66     STATE_ERROR
  67   };
  68
  69   // Called when the DemuxerStreamProviderShim is ready to go (has a config,
  70   // pipe handle, etc) and can be handed off to a renderer for use.
  71   void OnStreamReady(const mojo::Callback<void(bool)>& callback);
  72
  73   // Called when |audio_renderer_| initialization has completed.
  74   void OnRendererInitializeDone(const mojo::Callback<void(bool)>& callback,
  75                                 PipelineStatus status);
  76
  77   // Callback executed by filters to update statistics.
  78   void OnUpdateStatistics(const PipelineStatistics& stats);
  79
  80   // Periodically polls the media time from the renderer and notifies the client
  81   // if the media time has changed since the last update.  If |force| is true,
  82   // the client is notified even if the time is unchanged.
  83   void UpdateMediaTime(bool force);
  84   void CancelPeriodicMediaTimeUpdates();
  85   void SchedulePeriodicMediaTimeUpdates();
  86
  87   // Callback executed by audio renderer when buffering state changes.
  88   // TODO(tim): Need old and new.
  89   void OnBufferingStateChanged(BufferingState new_buffering_state);
  90
  91   // Callback executed when a renderer has ended.
  92   void OnRendererEnded();
  93
  94   // Callback executed when a runtime error happens.
  95   void OnError(PipelineStatus error);
  96
  97   // Callback executed once Flush() completes.
  98   void OnFlushCompleted(const mojo::Closure& callback);
  99
 100   // Callback executed once SetCdm() completes.
 101   void OnCdmAttached(const mojo::Callback<void(bool)>& callback, bool success);
 102
 103   mojo::StrongBinding<interfaces::Renderer> binding_;
 104
 105   base::WeakPtr<CdmContextProvider> cdm_context_provider_;
 106
 107   State state_;
 108
 109   // Note: |renderer_| should be destructed before these objects to avoid access
 110   // violation.
 111   scoped_ptr<DemuxerStreamProviderShim> stream_provider_;
 112   scoped_refptr<AudioRendererSink> audio_renderer_sink_;
 113   scoped_ptr<VideoRendererSink> video_renderer_sink_;
 114
 115   scoped_ptr<media::Renderer> renderer_;
 116
 117   base::RepeatingTimer<MojoRendererService> time_update_timer_;
 118   uint64_t last_media_time_usec_;
 119
 120   interfaces::RendererClientPtr client_;
 121
 122   base::WeakPtr<MojoRendererService> weak_this_;
 123   base::WeakPtrFactory<MojoRendererService> weak_factory_;
 124
 125   DISALLOW_COPY_AND_ASSIGN(MojoRendererService);
 126 };
 127
 128 }  // namespace media
 129
 130 #endif  // MEDIA_MOJO_SERVICES_MOJO_RENDERER_SERVICE_H_