Modifies SDK and iOS detection for helper method that needs iOS 9+

webrtc/modules/audio_device/ios/audio_device_ios.mm

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 244 matching lines @@
   LOG(LS_INFO) << " channels per packet: " << absd.mChannelsPerFrame;
   LOG(LS_INFO) << " bits per channel: " << absd.mBitsPerChannel;
   LOG(LS_INFO) << " reserved: " << absd.mReserved;
 }
 
 // Helper method that logs essential device information strings.
 static void LogDeviceInfo() {
   LOG(LS_INFO) << "LogDeviceInfo";
   @autoreleasepool {
     LOG(LS_INFO) << " system name: " << ios::GetSystemName();
-    LOG(LS_INFO) << " system version: " << ios::GetSystemVersion();
+    LOG(LS_INFO) << " system version 1(2): " << ios::GetSystemVersionAsString();

[tkchin_webrtc, 2016/03/02 19:23:45]

do we need both?

[henrika_webrtc, 2016/03/03 13:55:25]

If you don't mind I think we should keep both. Today we have:

[2823] (audio_device_ios.mm:265):  system version 1(2): 9.2.1
[2823] (audio_device_ios.mm:266):  system version 2(2): 9.2

hence, the x.x.1 is missing for the double representation. Ping me if you
disagree. I will land as is.

+    LOG(LS_INFO) << " system version 2(2): " << ios::GetSystemVersion();
     LOG(LS_INFO) << " device type: " << ios::GetDeviceType();
     LOG(LS_INFO) << " device name: " << ios::GetDeviceName();
     LOG(LS_INFO) << " process name: " << ios::GetProcessName();
     LOG(LS_INFO) << " process ID: " << ios::GetProcessID();
     LOG(LS_INFO) << " OS version: " << ios::GetOSVersionString();
     LOG(LS_INFO) << " processing cores: " << ios::GetProcessorCount();
+#if defined(__IPHONE_9_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_9_0
     LOG(LS_INFO) << " low power mode: " << ios::GetLowPowerModeEnabled();
+#endif
   }
 }
 #endif  // !defined(NDEBUG)
 
 AudioDeviceIOS::AudioDeviceIOS()
     : audio_device_buffer_(nullptr),
       vpio_unit_(nullptr),
       recording_(0),
       playing_(0),
       initialized_(false),
@@ skipping 806 matching lines @@
   // Read decoded 16-bit PCM samples from WebRTC (using a size that matches
   // the native I/O audio unit) to a preallocated intermediate buffer and
   // copy the result to the audio buffer in the |io_data| destination.
   SInt8* source = playout_audio_buffer_.get();
   fine_audio_buffer_->GetPlayoutData(source);
   memcpy(destination, source, dataSizeInBytes);
   return noErr;
 }
 
 }  // namespace webrtc