Improved AGC update scheme for the audio backend in Chrome

media/audio/pulse/pulse_input.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_PULSE_PULSE_INPUT_H_
 #define MEDIA_AUDIO_PULSE_PULSE_INPUT_H_
 
 #include <string>
 
 #include "base/threading/thread_checker.h"
+#include "media/audio/agc_audio_stream.h"
 #include "media/audio/audio_device_name.h"
-#include "media/audio/audio_input_stream_impl.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
 
 struct pa_context;
 struct pa_source_info;
 struct pa_stream;
 struct pa_threaded_mainloop;
 
 namespace media {
 
 class AudioManagerPulse;
 class SeekableBuffer;
 
-class PulseAudioInputStream : public AudioInputStreamImpl {
+class PulseAudioInputStream : public AgcAudioStream<AudioInputStream> {
  public:
   PulseAudioInputStream(AudioManagerPulse* audio_manager,
                         const std::string& device_name,
                         const AudioParameters& params,
                         pa_threaded_mainloop* mainloop,
                         pa_context* context);
 
   virtual ~PulseAudioInputStream();
 
   // Implementation of AudioInputStream.
@@ skipping 39 matching lines @@
   bool context_state_changed_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(PulseAudioInputStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_PULSE_PULSE_INPUT_H_