Stop playing/recording when not needed.

components/copresence/public/whispernet_client.h

 // 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.
 
 #ifndef COMPONENTS_COPRESENCE_PUBLIC_WHISPERNET_CLIENT_H_
 #define COMPONENTS_COPRESENCE_PUBLIC_WHISPERNET_CLIENT_H_
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 
 namespace media {
 class AudioBusRefCounted;
 }
 
 namespace copresence {
 
-struct FullToken {
-  FullToken(const std::string& token, bool audible)
+struct AudioToken {
+  AudioToken(const std::string& token, bool audible)
       : token(token), audible(audible) {}
   std::string token;
   bool audible;
 };
 
 // The interface that the whispernet client needs to implement. These methods
 // provide us the ability to use the audio medium in copresence. Currently since
 // the only medium that copresence uses is audio, the implementation of this
 // interface is required.
 class WhispernetClient {
  public:
   // Generic callback to indicate a boolean success or failure.
   typedef base::Callback<void(bool)> SuccessCallback;
   // Callback that returns detected tokens.
-  typedef base::Callback<void(const std::vector<FullToken>&)> TokensCallback;
+  typedef base::Callback<void(const std::vector<AudioToken>&)> TokensCallback;
   // Callback that returns encoded samples for a given token.
   typedef base::Callback<void(const std::string&,
                               bool,
                               const scoped_refptr<media::AudioBusRefCounted>&)>
       SamplesCallback;
 
   // Initialize the whispernet client and call the callback when done. The
   // parameter indicates whether we succeeded or failed.
   virtual void Initialize(const SuccessCallback& init_callback) = 0;
   // Copresence will call this before making any calls to its destructors.
@@ skipping 15 matching lines @@
   virtual void RegisterDetectBroadcastCallback(
       const SuccessCallback& db_callback) = 0;
 
   // Don't cache these callbacks, as they may become invalid at any time.
   // Always invoke callbacks directly through these accessors.
   virtual TokensCallback GetTokensCallback() = 0;
   virtual SamplesCallback GetSamplesCallback() = 0;
   virtual SuccessCallback GetDetectBroadcastCallback() = 0;
   virtual SuccessCallback GetInitializedCallback() = 0;
 
-  virtual ~WhispernetClient() {};
+  virtual ~WhispernetClient() {}
 };
 
 }  // namespace copresence
 
 #endif  // COMPONENTS_COPRESENCE_PUBLIC_WHISPERNET_CLIENT_H_