Mojify demuxers and allow running {Chunk/FFmpeg}Demuxer in a Utility Process

media/mojo/services/mojo_data_source_adapter.h

Index: media/mojo/services/mojo_data_source_adapter.h
diff --git a/media/mojo/services/mojo_data_source_adapter.h b/media/mojo/services/mojo_data_source_adapter.h
new file mode 100644
index 0000000000000000000000000000000000000000..a3ce27263947efbfbf6e0115f7d69ee6e8226050
--- /dev/null
+++ b/media/mojo/services/mojo_data_source_adapter.h
@@ -0,0 +1,76 @@
+// 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_SERVICES_MOJO_DATA_SOURCE_ADAPTER_H_
+#define MEDIA_MOJO_SERVICES_MOJO_DATA_SOURCE_ADAPTER_H_
+
+#include <condition_variable>
+#include <memory>
+#include <mutex>
+#include <queue>
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "media/base/data_source.h"
+#include "media/mojo/interfaces/data_source.mojom.h"
+
+namespace media {
+
+class DataBuffer;
+class MojoDataBufferReader;
+
+// This class acts as a MojoRendererService-side stub for a real DemuxerStream
+// that is part of a Pipeline in a remote application. Roughly speaking, it
+// takes a mojom::DemuxerStreamPtr and exposes it as a DemuxerStream for
+// use by
+// media components.
+class MojoDataSourceAdapter : public DataSource {
+ public:
+  // |data_buffer| is connected to the mojom::DataSource that |this|
+  // will become the client of.
+  MojoDataSourceAdapter(mojom::DataSourcePtr data_source,
+                        const base::Closure& data_source_ready_cb);
+  ~MojoDataSourceAdapter() override;
+
+  // DataSource implementation.
+  void Read(int64_t position,
+            int size,
+            uint8_t* data,
+            const DataSource::ReadCB& read_cb) override;
+  void Stop() override;
+  void Abort() override;
+  bool GetSize(int64_t* size_out) override;
+  bool IsStreaming() override;
+  void SetBitrate(int bitrate) override;
+
+ private:
+  void OnDataSourceReady(const base::Closure& data_source_ready_cb,
+                         mojo::ScopedDataPipeConsumerHandle consumer_handle);
+  void OnDataSourceRead(uint8_t* data,
+                        const DataSource::ReadCB& read_cb,
+                        mojom::DataBufferPtr buffer,
+                        int size);
+  void OnBufferRead(uint8_t* data,
+                    const DataSource::ReadCB& read_cb,
+                    int size,
+                    scoped_refptr<media::DataBuffer> buffer);
+  void GetSizeInternal(bool* success, int64_t* size_out);
+
+  std::mutex mutex_;
+  std::condition_variable condition_;
+
+  // See constructor for descriptions.
+  mojom::DataSourcePtr data_source_;
+
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+
+  std::unique_ptr<MojoDataBufferReader> mojo_data_buffer_reader_;
+
+  base::WeakPtrFactory<MojoDataSourceAdapter> weak_factory_;
+  DISALLOW_COPY_AND_ASSIGN(MojoDataSourceAdapter);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_MOJO_SERVICES_MOJO_DATA_SOURCE_ADAPTER_H_