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

services/media/framework/parts/null_sink.h

+// 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_PARTS_NULL_SINK_H_
+#define SERVICES_MEDIA_FRAMEWORK_PARTS_NULL_SINK_H_
+
+#include "services/media/framework/models/active_sink.h"
+
+namespace mojo {
+namespace media {
+
+class NullSink;
+
+typedef SharedPtr<NullSink, ActiveSink> NullSinkPtr;
+
+// Sink that throws packets away.
+class NullSink : public ActiveSink {
+ public:
+  static NullSinkPtr Create() { return NullSinkPtr(new NullSink()); }
+
+  ~NullSink() override;
+
+  // ActiveSink implementation.
+  bool must_allocate() const override;
+
+  Allocator* allocator() override;
+
+  void SetDemandCallback(DemandCallback demand_callback) override;
+
+  void Prime() override;
+
+  Demand SupplyPacket(PacketPtr packet) override;
+
+ private:
+  NullSink();
+
+  DemandCallback demand_callback_;
+};
+
+}  // namespace media
+}  // namespace mojo
+
+#endif  // SERVICES_MEDIA_FRAMEWORK_PARTS_NULL_SINK_H_