Define remote playback proto buffer

media/remoting/rpc/decoder_buffer_segment.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_REMOTING_RPC_DECODER_BUFFER_SEGMENT_H_
+#define MEDIA_REMOTING_RPC_DECODER_BUFFER_SEGMENT_H_
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "media/base/decoder_buffer.h"
+
+namespace media {
+namespace remoting {
+
+// Utility class to serialize and de-serialize between media::DecoderBuffer and
+// byte array. The idea is to serialize media::DecoderBuffer except for actual
+// decoder buffer using proto buffer and append the decoder buffer at the end.
+// into byte array for data transmission.
+//
+// DecoderBufferSegment {
+//  // Payload version. Default value is 0.
+//  u8 payload_version;
+//
+//  // Length of protobuf-encoded media::DecoderBuffer(except for data).
+//  u16 buffer_segment_size;
+//  // Protobuf-encoded media::DecoderBuffer.
+//  u8[buffer_segment_size] buffer_segment;
+//
+//  // Length of data in media::DecoderBuffer.
+//  u32 data_buffer_size;
+//  // media::DecoderBuffer data.
+//  u8[data_buffer_size] data_buffer;
+//};
+
+// Converts DecoderBufferSegment into byte array.
+std::vector<uint8_t> DecoderBufferToByteArray(
+    const scoped_refptr<::media::DecoderBuffer> decoder_buffer);

[miu, 2016/09/13 05:40:57]

nit: Please pass by const-ref: const ::media::DecoderBuffer& decoder_buffer.

[erickung1, 2016/09/15 02:13:33]

Done.

+
+// Converts byte array into DecoderBufferSegment.
+scoped_refptr<::media::DecoderBuffer> ByteArrayToDecoderBuffer(
+    const uint8_t* data,
+    uint32_t size);
+
+}  // namespace remoting
+}  // namespace media
+
+#endif  // MEDIA_REMOTING_RPC_DECODER_BUFFER_SEGMENT_H_