Ensure that data is not overwritten in the audio input shared memory ring buffer that sits on the b…

media/audio/audio_input_controller.h

 // 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.
 
 #ifndef MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_
 #define MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_
 
 #include <string>
 #include "base/atomicops.h"
 #include "base/callback.h"
@@ skipping 111 matching lines @@
                         const AudioBus* data) = 0;
     virtual void OnLog(AudioInputController* controller,
                        const std::string& message) = 0;
 
    protected:
     virtual ~EventHandler() {}
   };
 
   // A synchronous writer interface used by AudioInputController for
   // synchronous writing.
-  class SyncWriter {
+  class MEDIA_EXPORT SyncWriter {
    public:
     virtual ~SyncWriter() {}
 
     // Write certain amount of data from |data|.
     virtual void Write(const AudioBus* data,
                        double volume,
                        bool key_pressed,
                        uint32 hardware_delay_bytes) = 0;
 
     // Close this synchronous writer.
@@ skipping 242 matching lines @@
 
   // Used for audio debug recordings. Accessed on audio thread.
   AudioInputWriter* input_writer_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioInputController);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_INPUT_CONTROLLER_H_