Reland 10952007: Pass through small buffer sizes without FIFO on Linux

media/audio/linux/audio_manager_linux.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_LINUX_AUDIO_MANAGER_LINUX_H_
 #define MEDIA_AUDIO_LINUX_AUDIO_MANAGER_LINUX_H_
 
 #include <string>
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
@@ skipping 21 matching lines @@
 
   // Implementation of AudioManagerBase.
   virtual AudioOutputStream* MakeLinearOutputStream(
       const AudioParameters& params) OVERRIDE;
   virtual AudioOutputStream* MakeLowLatencyOutputStream(
       const AudioParameters& params) OVERRIDE;
   virtual AudioInputStream* MakeLinearInputStream(
       const AudioParameters& params, const std::string& device_id) OVERRIDE;
   virtual AudioInputStream* MakeLowLatencyInputStream(
       const AudioParameters& params, const std::string& device_id) OVERRIDE;
+  virtual AudioParameters GetPreferredLowLatencyOutputStreamParameters(
+      const AudioParameters& input_params) OVERRIDE;
 
  protected:
   virtual ~AudioManagerLinux();
 
  private:
   enum StreamType {
     kStreamPlayback = 0,
     kStreamCapture,
   };
 
@@ skipping 23 matching lines @@
                                     const std::string& device_id);
 
   scoped_ptr<AlsaWrapper> wrapper_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioManagerLinux);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_LINUX_AUDIO_MANAGER_LINUX_H_