Implement MojoAudioRendererSink and use it in UtilityMojoMediaClient

media/mojo/clients/mojo_audio_renderer_sink_impl.h

+// Copyright 2017 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_CLIENTS_MOJO_AUDIO_RENDERER_SINK_IMPL_H_
+#define MEDIA_MOJO_CLIENTS_MOJO_AUDIO_RENDERER_SINK_IMPL_H_
+
+#include <memory>
+
+#include "media/base/audio_renderer_sink.h"
+#include "media/mojo/interfaces/audio_renderer_sink.mojom.h"
+#include "mojo/public/cpp/bindings/binding.h"
+
+namespace media {
+
+class MojoAudioRendererSinkImpl
+    : public NON_EXPORTED_BASE(media::AudioRendererSink::RenderCallback),
+      public mojom::AudioRendererSink {
+ public:
+  MojoAudioRendererSinkImpl(
+      const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
+      media::AudioRendererSink* sink,
+      mojo::InterfaceRequest<mojom::AudioRendererSink> request);
+  ~MojoAudioRendererSinkImpl() override;
+
+  // AudioRendererSink::RenderCallback implementation.
+  int Render(base::TimeDelta delay,
+             base::TimeTicks delay_timestamp,
+             int prior_frames_skipped,
+             AudioBus* dest) override;
+  void OnRenderError() override;
+
+  // mojom::AudioRendererSink implementation.
+  void Initialize(
+      const media::AudioParameters& params,
+      mojom::AudioRendererSinkRenderCallbackPtr render_callback) final;
+  void Start() final;
+  void Stop() final;
+  void Pause() final;
+  void Play() final;
+  void SetVolume(double volume, const SetVolumeCallback& callback) final;
+  void GetOutputDeviceInfo(const GetOutputDeviceInfoCallback& callback) final;
+  void CurrentThreadIsRenderingThread(
+      const CurrentThreadIsRenderingThreadCallback& callback) final;
+
+  // Sets an error handler that will be called if a connection error occurs on
+  // the bound message pipe.
+  void set_connection_error_handler(const base::Closure& error_handler) {
+    binding_.set_connection_error_handler(error_handler);
+  }
+
+ private:
+  scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> audio_device_task_runner_;
+
+  mojo::Binding<mojom::AudioRendererSink> binding_;
+
+  media::AudioRendererSink* sink_;
+  bool started_;
+
+  mojom::AudioRendererSinkRenderCallbackPtrInfo callback_info_;
+  mojom::AudioRendererSinkRenderCallbackPtr callback_;
+};
+
+}  // namespace media
+
+#endif  // MEDIA_MOJO_CLIENTS_MOJO_AUDIO_RENDERER_SINK_IMPL_H_