media/mojo/services/mojo_renderer_impl.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_IMPL_H_
   6 #define MEDIA_MOJO_SERVICES_MOJO_RENDERER_IMPL_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/weak_ptr.h"
  10 #include "media/base/renderer.h"
  11 #include "media/mojo/interfaces/renderer.mojom.h"
  12
  13 namespace base {
  14 class SingleThreadTaskRunner;
  15 }
  16
  17 namespace media {
  18
  19 class DemuxerStreamProvider;
  20
  21 // A media::Renderer that proxies to a interfaces::Renderer. That
  22 // interfaces::Renderer proxies back to the MojoRendererImpl via the
  23 // interfaces::RendererClient interface.
  24 //
  25 // MojoRendererImpl implements media::Renderer for use as either an audio
  26 // or video renderer.
  27 class MojoRendererImpl : public Renderer, public interfaces::RendererClient {
  28  public:
  29   // |task_runner| is the TaskRunner on which all methods are invoked.
  30   MojoRendererImpl(
  31       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
  32       interfaces::RendererPtr remote_renderer);
  33   ~MojoRendererImpl() override;
  34
  35   // Renderer implementation.
  36   void Initialize(DemuxerStreamProvider* demuxer_stream_provider,
  37                   const PipelineStatusCB& init_cb,
  38                   const StatisticsCB& statistics_cb,
  39                   const BufferingStateCB& buffering_state_cb,
  40                   const base::Closure& ended_cb,
  41                   const PipelineStatusCB& error_cb,
  42                   const base::Closure& waiting_for_decryption_key_cb) override;
  43   void SetCdm(CdmContext* cdm_context,
  44               const CdmAttachedCB& cdm_attached_cb) override;
  45   void Flush(const base::Closure& flush_cb) override;
  46   void StartPlayingFrom(base::TimeDelta time) override;
  47   void SetPlaybackRate(double playback_rate) override;
  48   void SetVolume(float volume) override;
  49   base::TimeDelta GetMediaTime() override;
  50   bool HasAudio() override;
  51   bool HasVideo() override;
  52
  53   // interfaces::RendererClient implementation.
  54   void OnTimeUpdate(int64_t time_usec, int64_t max_time_usec) override;
  55   void OnBufferingStateChange(interfaces::BufferingState state) override;
  56   void OnEnded() override;
  57   void OnError() override;
  58
  59  private:
  60   // Called when |remote_renderer_| has finished initializing.
  61   void OnInitialized(bool success);
  62
  63   // Task runner used to execute pipeline tasks.
  64   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
  65
  66   DemuxerStreamProvider* demuxer_stream_provider_;
  67   interfaces::RendererPtr remote_renderer_;
  68   mojo::Binding<RendererClient> binding_;
  69
  70   // Callbacks passed to Initialize() that we forward messages from
  71   // |remote_renderer_| through.
  72   PipelineStatusCB init_cb_;
  73   base::Closure ended_cb_;
  74   PipelineStatusCB error_cb_;
  75   BufferingStateCB buffering_state_cb_;
  76
  77   // Lock used to serialize access for the following data members.
  78   mutable base::Lock lock_;
  79
  80   base::TimeDelta time_;
  81   // TODO(xhwang): It seems we don't need |max_time_| now. Drop it!
  82   base::TimeDelta max_time_;
  83
  84   base::WeakPtrFactory<MojoRendererImpl> weak_factory_;
  85
  86   DISALLOW_COPY_AND_ASSIGN(MojoRendererImpl);
  87 };
  88
  89 }  // namespace media
  90
  91 #endif  // MEDIA_MOJO_SERVICES_MOJO_RENDERER_IMPL_H_