add audio-buffer-size command line flag support to the input audio for all the platforms

media/audio/audio_manager_base.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_MANAGER_BASE_H_
 #define MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_
 
 #include <string>
 #include <utility>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/observer_list.h"
 #include "base/threading/thread.h"
 #include "media/audio/audio_manager.h"
 
 #include "media/audio/audio_output_dispatcher.h"
 
 #if defined(OS_WIN)
 #include "base/win/scoped_com_initializer.h"
 #endif
 
 namespace media {
 
+class AudioInputProxy;
 class AudioOutputDispatcher;
 
 // AudioManagerBase provides AudioManager functions common for all platforms.
 class MEDIA_EXPORT AudioManagerBase : public AudioManager {
  public:
   // TODO(sergeyu): The constants below belong to AudioManager interface, not
   // to the base implementation.
 
   // Name of the generic "default" device.
   static const char kDefaultDeviceName[];
@@ skipping 107 matching lines @@
   // streams. If the users inject a valid |input_params|, each AudioManager
   // will decide if they should return the values from |input_params| or the
   // default hardware values. If the |input_params| is invalid, it will return
   // the default hardware audio parameters.
   // If |output_device_id| is empty, the implementation must treat that as
   // a request for the default output device.
   virtual AudioParameters GetPreferredOutputStreamParameters(
       const std::string& output_device_id,
       const AudioParameters& input_params) = 0;
 
+  // Returns the preferred hardware audio output parameters for opening input
+  // streams. If the users inject a valid |input_params|, each AudioManager
+  // will decide if they should return the values from |input_params| or the
+  // default hardware values. If the |input_params| is invalid, it will return
+  // the default hardware audio parameters.
+  // If |input_device_id| is empty, the implementation must treat that as
+  // a request for the default output device.
+  virtual AudioParameters GetPreferredInputStreamParameters(
+      const std::string& input_device_id,
+      const AudioParameters& input_params) = 0;
+
   // Returns the ID of the default audio output device.
   // Implementations that don't yet support this should return an empty string.
   virtual std::string GetDefaultOutputDeviceID();
 
  private:
   struct DispatcherParams;
   typedef ScopedVector<DispatcherParams> AudioOutputDispatchers;
+  typedef ScopedVector<AudioInputProxy> AudioInputProxies;
 
   class CompareByParams;
 
   // Called by Shutdown().
   void ShutdownOnAudioThread();
 
+  // Helper for MakeAudioInputStream() to get the supported hardware
+  // format for the new stream.
+  AudioParameters GetSupportedInputHardwareParameters(
+      const std::string& device_id, const AudioParameters& preferred_params);
+
   // Max number of open output streams, modified by
   // SetMaxOutputStreamsAllowed().
   int max_num_output_streams_;
 
   // Max number of open input streams.
   int max_num_input_streams_;
 
   // Number of currently open output streams.
   int num_output_streams_;
 
   // Number of currently open input streams.
   int num_input_streams_;
 
   // Track output state change listeners.
   ObserverList<AudioDeviceListener> output_listeners_;
 
   // Thread used to interact with audio streams created by this audio manager.
   base::Thread audio_thread_;
 
   // The task runner of the audio thread this object runs on. Used for internal
   // tasks which run on the audio thread even after Shutdown() has been started
   // and GetTaskRunner() starts returning NULL.
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
-  // Map of cached AudioOutputDispatcher instances.  Must only be touched
-  // from the audio thread (no locking).
+  // Vector of cached AudioOutputDispatcher instances.  Must only be touched
+  // on the audio thread (no locking).
   AudioOutputDispatchers output_dispatchers_;
 
+  // Vector of cached AudioInputProxy instances.  Must only be touched on
+  // the audio thread.
+  AudioInputProxies input_proxies_;
+
   // Proxy for creating AudioLog objects.
   AudioLogFactory* const audio_log_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioManagerBase);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_