Introduce AudioHardwareConfig for renderer side audio device info.

media/base/audio_hardware_config.cc

Index: media/base/audio_hardware_config.cc
diff --git a/media/base/audio_hardware_config.cc b/media/base/audio_hardware_config.cc
new file mode 100644
index 0000000000000000000000000000000000000000..eaacc690d1d38edba8eedfcfb2804a88813d8d27
--- /dev/null
+++ b/media/base/audio_hardware_config.cc
@@ -0,0 +1,53 @@
+// Copyright (c) 2013 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 "media/base/audio_hardware_config.h"
+
+namespace media {
+
+AudioHardwareConfig::AudioHardwareConfig(
+    int output_buffer_size, int output_sample_rate,
+    int input_sample_rate, ChannelLayout input_channel_layout)
+    : output_buffer_size_(output_buffer_size),
+      output_sample_rate_(output_sample_rate),
+      input_sample_rate_(input_sample_rate),
+      input_channel_layout_(input_channel_layout) {
+}
+
+AudioHardwareConfig::~AudioHardwareConfig() {}
+
+int AudioHardwareConfig::GetOutputBufferSize() {
+  base::AutoLock auto_lock(config_lock_);
+  return output_buffer_size_;
+}
+
+int AudioHardwareConfig::GetOutputSampleRate() {
+  base::AutoLock auto_lock(config_lock_);
+  return output_sample_rate_;
+}
+
+int AudioHardwareConfig::GetInputSampleRate() {
+  base::AutoLock auto_lock(config_lock_);
+  return input_sample_rate_;
+}
+
+ChannelLayout AudioHardwareConfig::GetInputChannelLayout() {
+  base::AutoLock auto_lock(config_lock_);
+  return input_channel_layout_;
+}
+
+void AudioHardwareConfig::UpdateInputConfig(
+    int sample_rate, media::ChannelLayout channel_layout) {
+  base::AutoLock auto_lock(config_lock_);
+  input_sample_rate_ = sample_rate;
+  input_channel_layout_ = channel_layout;
+}
+
+void AudioHardwareConfig::UpdateOutputConfig(int buffer_size, int sample_rate) {
+  base::AutoLock auto_lock(config_lock_);
+  output_buffer_size_ = buffer_size;
+  output_sample_rate_ = sample_rate;
+}
+
+}  // namespace media