Finish plumbing MojoVideoDecoder.

media/mojo/services/mojo_video_decoder_service.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 MEDIA_MOJO_SERVICES_MOJO_VIDEO_DECODER_SERVICE_H_
+#define MEDIA_MOJO_SERVICES_MOJO_VIDEO_DECODER_SERVICE_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "media/base/decode_status.h"
+#include "media/mojo/interfaces/video_decoder.mojom.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "mojo/public/cpp/system/data_pipe.h"
+
+namespace media {
+
+class MojoMediaClient;
+class VideoDecoder;
+class VideoFrame;
+
+// Implementation of a mojom::VideoDecoder which runs in the GPU process,
+// and wraps a media::VideoDecoder.
+class MojoVideoDecoderService : public mojom::VideoDecoder {
+ public:
+  MojoVideoDecoderService(mojo::InterfaceRequest<mojom::VideoDecoder> request,
+                          MojoMediaClient* mojo_media_client);
+  ~MojoVideoDecoderService() final;
+
+  // mojom::VideoDecoder implementation
+  void Construct(mojom::VideoDecoderClientPtr client,
+                 mojo::ScopedDataPipeConsumerHandle decoder_buffer_pipe) final;
+  void Initialize(mojom::VideoDecoderConfigPtr config,
+                  bool low_delay,
+                  const InitializeCallback& callback) final;
+  void Decode(mojom::DecoderBufferPtr buffer,
+              const DecodeCallback& callback) final;
+  void Reset(const ResetCallback& callback) final;
+
+ private:
+  void OnDecoderInitialized(const InitializeCallback& callback, bool success);
+  void OnDecoderDecoded(const DecodeCallback& callback, DecodeStatus status);
+  void OnDecoderOutput(const scoped_refptr<VideoFrame>& frame);
+  void OnDecoderReset(const ResetCallback& callback);
+
+  mojo::StrongBinding<mojom::VideoDecoder> binding_;
+  mojom::VideoDecoderClientPtr client_;
+  mojo::ScopedDataPipeConsumerHandle decoder_buffer_pipe_;
+
+  MojoMediaClient* mojo_media_client_;
+  std::unique_ptr<media::VideoDecoder> decoder_;
+
+  base::WeakPtr<MojoVideoDecoderService> weak_this_;
+  base::WeakPtrFactory<MojoVideoDecoderService> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(MojoVideoDecoderService);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_MOJO_SERVICES_MOJO_VIDEO_DECODER_SERVICE_H_