Motown in-proc streaming framework used to implement media services.

services/media/framework/stages/active_sink_stage.h

Index: services/media/framework/stages/active_sink_stage.h
diff --git a/services/media/framework/stages/active_sink_stage.h b/services/media/framework/stages/active_sink_stage.h
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+// Copyright 2016 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 SERVICES_MEDIA_FRAMEWORK_ENGINE_ACTIVE_SINK_STAGE_H_
+#define SERVICES_MEDIA_FRAMEWORK_ENGINE_ACTIVE_SINK_STAGE_H_
+
+#include <deque>
+
+#include "services/media/framework/models/active_sink.h"
+#include "services/media/framework/stages/stage.h"
+
+namespace mojo {
+namespace media {
+
+// A stage that hosts an ActiveSink.
+class ActiveSinkStage : public Stage {
+ public:
+  ActiveSinkStage(ActiveSinkPtr source);
+
+  ~ActiveSinkStage() override;
+
+  // Stage implementation.
+  uint32_t input_count() const override;
+
+  StageInput& input(uint32_t index) override;
+
+  uint32_t output_count() const override;
+
+  StageOutput& output(uint32_t index) override;
+
+  bool Prepare(UpdateCallback update_callback) override;
+
+  void Prime() override;
+
+  void Update(Engine* engine) override;
+
+ private:
+  StageInput input_;
+  ActiveSinkPtr sink_;
+  ActiveSink::DemandCallback demand_function_;
+  Stage::UpdateCallback update_callback_;
+  Demand sink_demand_;
+};
+
+}  // namespace media
+}  // namespace mojo
+
+#endif  // SERVICES_MEDIA_FRAMEWORK_ENGINE_ACTIVE_SINK_STAGE_H_