device/bluetooth: Add Bluetooth Audio Sink base class.

device/bluetooth/bluetooth_audio_sink.cc

+// Copyright 2014 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.
+
+#include "device/bluetooth/bluetooth_audio_sink.h"
+
+namespace device {
+
+BluetoothAudioSink::Options::Options() {

[armansito, 2014/12/03 23:34:52]

nit: Use the initializer list as you had before (codec_(0x00), ..) but maybe put
the comments above the constructor?

[Miao, 2014/12/04 02:34:06]

Done.

+  // SBC codec(0x00) is the mandatory codec for A2DP audio sink.
+  codec = 0x00;
+
+  // |capabilities| includes the mandatory support for A2DP audio sink.
+  // [Octet0]: 0x3f
+  //   Sampling frequency [0 0 1 1]: supports 44100 Hz and 48000 Hz.
+  //   Channel mode [1 1 1 1]: supports Mono, Dual Channel, Stereo, and Joint
+  //                           Stereo.
+  // [Octet1]: 0xff
+  //    Block length [1, 1, 1, 1]: supports block length of 4, 8, 12 and 16.
+  //    Subbands [1, 1]: supports 4 and 8 subbands.
+  //    Allocation Method [1, 1]: supports SNR and Loudness.
+  // [Octet2]: 0x12
+  //    Minimum bitpool value: 18 is the bitpool value for Mono.
+  // [Octet3]: 0x35
+  //    Maximum bitpool value: 53 is the bitpool value for Joint Stereo.
+  capabilities = {0x3f, 0xff, 0x12, 0x35};
+}
+
+BluetoothAudioSink::Options::~Options() {
+}
+
+BluetoothAudioSink::BluetoothAudioSink() {
+}
+
+BluetoothAudioSink::~BluetoothAudioSink() {
+}
+
+
+}  // namespace device