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

services/media/framework/stages/packet_transform_stage.h

Index: services/media/framework/stages/packet_transform_stage.h
diff --git a/services/media/framework/stages/packet_transform_stage.h b/services/media/framework/stages/packet_transform_stage.h
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+++ b/services/media/framework/stages/packet_transform_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_PACKET_TRANSFORM_STAGE_H_
+#define SERVICES_MEDIA_FRAMEWORK_ENGINE_PACKET_TRANSFORM_STAGE_H_
+
+#include "services/media/framework/models/packet_transform.h"
+#include "services/media/framework/stages/stage.h"
+
+namespace mojo {
+namespace media {
+
+// A stage that hosts a PacketTransform.
+class PacketTransformStage : public Stage {
+ public:
+  PacketTransformStage(PacketTransformPtr transform);
+
+  ~PacketTransformStage() 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(const UpdateCallback update_callback) override;
+
+  void Update(Engine* engine) override;
+
+ private:
+  StageInput input_;
+  StageOutput output_;
+  PacketTransformPtr transform_;
+  Allocator* allocator_;
+  bool input_packet_is_new_;
+};
+
+}  // namespace media
+}  // namespace mojo
+
+#endif  // SERVICES_MEDIA_FRAMEWORK_ENGINE_PACKET_TRANSFORM_STAGE_H_