iSAC: Make separate AudioEncoder and AudioDecoder objects

webrtc/modules/audio_coding/codecs/isac/locked_bandwidth_info.h

Index: webrtc/modules/audio_coding/codecs/isac/locked_bandwidth_info.h
diff --git a/webrtc/modules/audio_coding/codecs/isac/locked_bandwidth_info.h b/webrtc/modules/audio_coding/codecs/isac/locked_bandwidth_info.h
new file mode 100644
index 0000000000000000000000000000000000000000..bf39003c1215260ba5e3de1e2dfc05569baaffcc
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+++ b/webrtc/modules/audio_coding/codecs/isac/locked_bandwidth_info.h
@@ -0,0 +1,45 @@
+/*
+ *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_LOCKED_BANDWIDTH_INFO_H_
+#define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_LOCKED_BANDWIDTH_INFO_H_
+
+#include "webrtc/base/scoped_ptr.h"
+#include "webrtc/base/thread_annotations.h"
+#include "webrtc/modules/audio_coding/codecs/isac/bandwidth_info.h"
+#include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
+
+namespace webrtc {
+
+// An IsacBandwidthInfo that's safe to access from multiple threads because
+// it's protected by a mutex.
+class LockedIsacBandwidthInfo final {
+ public:
+  LockedIsacBandwidthInfo();
+  ~LockedIsacBandwidthInfo();
+
+  IsacBandwidthInfo Get() const {
+    CriticalSectionScoped cs(lock_.get());
+    return bwinfo_;
+  }
+
+  void Set(const IsacBandwidthInfo& bwinfo) {
+    CriticalSectionScoped cs(lock_.get());
+    bwinfo_ = bwinfo;
+  }
+
+ private:
+  const rtc::scoped_ptr<CriticalSectionWrapper> lock_;
+  IsacBandwidthInfo bwinfo_ GUARDED_BY(lock_);
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_LOCKED_BANDWIDTH_INFO_H_