Make AudioParameters a class instead of a struct

content/common/media/audio_param_traits.cc

+// Copyright (c) 2012 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 "content/common/media/audio_param_traits.h"
+
+#include "base/stringprintf.h"
+#include "media/audio/audio_parameters.h"
+
+namespace IPC {
+
+void ParamTraits<AudioParameters>::Write(Message* m,
+                                         const AudioParameters& p) {
+  m->WriteInt(static_cast<int>(p.format()));
+  m->WriteInt(static_cast<int>(p.channel_layout()));
+  m->WriteInt(p.sample_rate());
+  m->WriteInt(p.bits_per_sample());
+  m->WriteInt(p.frames_per_buffer());
+  m->WriteInt(p.channels());
+}
+
+bool ParamTraits<AudioParameters>::Read(const Message* m,
+                                        PickleIterator* iter,
+                                        AudioParameters* r) {
+  int format, channel_layout, sample_rate, bits_per_sample,
+      frames_per_buffer, channels;
+
+  if (!m->ReadInt(iter, &format) ||
+      !m->ReadInt(iter, &channel_layout) ||
+      !m->ReadInt(iter, &sample_rate) ||
+      !m->ReadInt(iter, &bits_per_sample) ||
+      !m->ReadInt(iter, &frames_per_buffer) ||
+      !m->ReadInt(iter, &channels))
+    return false;
+  r->Reset(static_cast<AudioParameters::Format>(format),
+           static_cast<ChannelLayout>(channel_layout),
+           sample_rate, bits_per_sample, frames_per_buffer);
+  return true;
+}
+
+void ParamTraits<AudioParameters>::Log(const AudioParameters& p,
+                                       std::string* l) {
+  l->append(base::StringPrintf("<AudioParameters>"));
+}
+
+}