Let default device in PulseAudio be the system default device

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 <pulse/pulseaudio.h>
 #include <stddef.h>
 #include <string>
 
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
 #include "media/audio/agc_audio_stream.h"
 #include "media/audio/audio_device_name.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
+#include "media/audio/pulse/pulse_util.h"
 #include "media/base/audio_block_fifo.h"
 
 namespace media {
 
 class AudioManagerPulse;
 
 class PulseAudioInputStream : public AgcAudioStream<AudioInputStream> {
  public:
   PulseAudioInputStream(AudioManagerPulse* audio_manager,
                         const std::string& device_name,
@@ skipping 46 matching lines @@
   AudioBlockFifo fifo_;
 
   // PulseAudio API structs.
   pa_threaded_mainloop* pa_mainloop_; // Weak.
   pa_context* pa_context_;  // Weak.
   pa_stream* handle_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(PulseAudioInputStream);
+  friend void pulse::SystemDefaultInputDeviceCallback(
+      pa_context* context,
+      const pa_server_info* info,
+      void* user_data);
+  friend std::string pulse::GetSystemDefaultInputDevice(
+      pa_threaded_mainloop* mainloop,
+      pa_context* context);
+  friend void pulse::SystemDefaultOutputDeviceCallback(
+      pa_context* context,
+      const pa_server_info* info,
+      void* user_data);
+  friend std::string pulse::GetSystemDefaultOutputDevice(
+      pa_threaded_mainloop* mainloop,
+      pa_context* context);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_PULSE_PULSE_INPUT_H_