Refactor the AudioDevice for iOS and improve the performance and stability

webrtc/modules/audio_device/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("../../build/webrtc.gni")
 
 config("audio_device_config") {
   include_dirs = [
     "../interface",
     "include",
     "dummy",  # Contains dummy audio device implementations.
   ]
 }
 
 source_set("audio_device") {
   sources = [
     "audio_device_buffer.cc",
     "audio_device_buffer.h",
     "audio_device_config.h",
     "audio_device_generic.cc",
     "audio_device_generic.h",
     "dummy/audio_device_dummy.cc",
     "dummy/audio_device_dummy.h",
     "dummy/file_audio_device.cc",
     "dummy/file_audio_device.h",
+    "fine_audio_buffer.cc",
+    "fine_audio_buffer.h",
     "include/audio_device.h",
     "include/audio_device_defines.h",
   ]
 
   include_dirs = []
   if (is_linux) {
     include_dirs += [ "linux" ]
   }
   if (is_ios) {
     include_dirs += [ "ios" ]
@@ skipping 10 matching lines @@
   if (rtc_include_internal_audio_device) {
     defines += [ "WEBRTC_INCLUDE_INTERNAL_AUDIO_DEVICE" ]
     sources += [
       "android/audio_device_template.h",
       "android/audio_manager.cc",
       "android/audio_manager.h",
       "android/audio_record_jni.cc",
       "android/audio_record_jni.h",
       "android/audio_track_jni.cc",
       "android/audio_track_jni.h",
-      "android/fine_audio_buffer.cc",
-      "android/fine_audio_buffer.h",
       "android/opensles_common.cc",
       "android/opensles_common.h",
       "android/opensles_player.cc",
       "android/opensles_player.h",
       "audio_device_impl.cc",
       "audio_device_impl.h",
       "ios/audio_device_ios.h",
       "ios/audio_device_ios.mm",
       "linux/alsasymboltable_linux.cc",
       "linux/alsasymboltable_linux.h",
@@ skipping 87 matching lines @@
   }
 
   deps = [
     "../..:webrtc_common",
     "../../base:rtc_base_approved",
     "../../common_audio",
     "../../system_wrappers",
     "../utility",
   ]
 }