Adds low complexity audio mode for single core CPUs

webrtc/modules/utility/source/helpers_ios.mm

 /*
  *  Copyright (c) 2015 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.
  */
 
 #if defined(WEBRTC_IOS)
 
 #import <AVFoundation/AVFoundation.h>
 #import <Foundation/Foundation.h>
 #import <sys/sysctl.h>
 #import <UIKit/UIKit.h>
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/modules/utility/include/helpers_ios.h"
 
 namespace webrtc {
 namespace ios {
 
+// Internal helper method used by GetDeviceName() to return device name.
+const char* LookUpRealName(const char* raw_name) {
+  // Lookup table which maps raw device names to real (human readable) names.
+  struct {
+    const char* raw_name;
+    const char* real_name;
+  } device_names[] = {
+      {"iPhone1,1", "iPhone 1G"},
+      {"iPhone1,2", "iPhone 3G"},
+      {"iPhone2,1", "iPhone 3GS"},
+      {"iPhone3,1", "iPhone 4"},
+      {"iPhone3,3", "Verizon iPhone 4"},
+      {"iPhone4,1", "iPhone 4S"},
+      {"iPhone5,1", "iPhone 5 (GSM)"},
+      {"iPhone5,2", "iPhone 5 (GSM+CDMA)"},
+      {"iPhone5,3", "iPhone 5c (GSM)"},
+      {"iPhone5,4", "iPhone 5c (GSM+CDMA)"},
+      {"iPhone6,1", "iPhone 5s (GSM)"},
+      {"iPhone6,2", "iPhone 5s (GSM+CDMA)"},
+      {"iPhone7,1", "iPhone 6 Plus"},
+      {"iPhone7,2", "iPhone 6"},
+      {"iPhone8,1", "iPhone 6s"},
+      {"iPhone8,2", "iPhone 6s Plus"},
+      {"iPod1,1", "iPod Touch 1G"},
+      {"iPod2,1", "iPod Touch 2G"},
+      {"iPod3,1", "iPod Touch 3G"},
+      {"iPod4,1", "iPod Touch 4G"},
+      {"iPod5,1", "iPod Touch 5G"},
+      {"iPad1,1", "iPad"},
+      {"iPad2,1", "iPad 2 (WiFi)"},
+      {"iPad2,2", "iPad 2 (GSM)"},
+      {"iPad2,3", "iPad 2 (CDMA)"},
+      {"iPad2,4", "iPad 2 (WiFi)"},
+      {"iPad2,5", "iPad Mini (WiFi)"},
+      {"iPad2,6", "iPad Mini (GSM)"},
+      {"iPad2,7", "iPad Mini (GSM+CDMA)"},
+      {"iPad3,1", "iPad 3 (WiFi)"},
+      {"iPad3,2", "iPad 3 (GSM+CDMA)"},
+      {"iPad3,3", "iPad 3 (GSM)"},
+      {"iPad3,4", "iPad 4 (WiFi)"},
+      {"iPad3,5", "iPad 4 (GSM)"},
+      {"iPad3,6", "iPad 4 (GSM+CDMA)"},
+      {"iPad4,1", "iPad Air (WiFi)"},
+      {"iPad4,2", "iPad Air (Cellular)"},
+      {"iPad4,4", "iPad mini 2G (WiFi)"},
+      {"iPad4,5", "iPad mini 2G (Cellular)"},
+      {"i386", "Simulator"},
+      {"x86_64", "Simulator"},
+  };
+
+  for (auto& d : device_names) {
+    if (strcmp(d.raw_name, raw_name) == 0)
+      return d.real_name;
+  }
+  LOG(LS_WARNING) << "Failed to find device name (" << raw_name << ")";
+  return "";
+}
+
 // TODO(henrika): move to shared location.
 // See https://code.google.com/p/webrtc/issues/detail?id=4773 for details.
 NSString* NSStringFromStdString(const std::string& stdString) {
   // std::string may contain null termination character so we construct
   // using length.
   return [[NSString alloc] initWithBytes:stdString.data()
                                   length:stdString.length()
                                 encoding:NSUTF8StringEncoding];
 }
 
@@ skipping 46 matching lines @@
   NSString* deviceModel = [[UIDevice currentDevice] model];
   return StdStringFromNSString(deviceModel);
 }
 
 std::string GetDeviceName() {
   size_t size;
   sysctlbyname("hw.machine", NULL, &size, NULL, 0);
   rtc::scoped_ptr<char[]> machine;
   machine.reset(new char[size]);
   sysctlbyname("hw.machine", machine.get(), &size, NULL, 0);
-  std::string raw_name(machine.get());
-  if (!raw_name.compare("iPhone1,1"))
-    return std::string("iPhone 1G");
-  if (!raw_name.compare("iPhone1,2"))
-    return std::string("iPhone 3G");
-  if (!raw_name.compare("iPhone2,1"))
-    return std::string("iPhone 3GS");
-  if (!raw_name.compare("iPhone3,1"))
-    return std::string("iPhone 4");
-  if (!raw_name.compare("iPhone3,3"))
-    return std::string("Verizon iPhone 4");
-  if (!raw_name.compare("iPhone4,1"))
-    return std::string("iPhone 4S");
-  if (!raw_name.compare("iPhone5,1"))
-    return std::string("iPhone 5 (GSM)");
-  if (!raw_name.compare("iPhone5,2"))
-    return std::string("iPhone 5 (GSM+CDMA)");
-  if (!raw_name.compare("iPhone5,3"))
-    return std::string("iPhone 5c (GSM)");
-  if (!raw_name.compare("iPhone5,4"))
-    return std::string("iPhone 5c (GSM+CDMA)");
-  if (!raw_name.compare("iPhone6,1"))
-    return std::string("iPhone 5s (GSM)");
-  if (!raw_name.compare("iPhone6,2"))
-    return std::string("iPhone 5s (GSM+CDMA)");
-  if (!raw_name.compare("iPhone7,1"))
-    return std::string("iPhone 6 Plus");
-  if (!raw_name.compare("iPhone7,2"))
-    return std::string("iPhone 6");
-  if (!raw_name.compare("iPhone8,1"))
-    return std::string("iPhone 6s");
-  if (!raw_name.compare("iPhone8,2"))
-    return std::string("iPhone 6s Plus");
-  if (!raw_name.compare("iPod1,1"))
-    return std::string("iPod Touch 1G");
-  if (!raw_name.compare("iPod2,1"))
-    return std::string("iPod Touch 2G");
-  if (!raw_name.compare("iPod3,1"))
-    return std::string("iPod Touch 3G");
-  if (!raw_name.compare("iPod4,1"))
-    return std::string("iPod Touch 4G");
-  if (!raw_name.compare("iPod5,1"))
-    return std::string("iPod Touch 5G");
-  if (!raw_name.compare("iPad1,1"))
-    return std::string("iPad");
-  if (!raw_name.compare("iPad2,1"))
-    return std::string("iPad 2 (WiFi)");
-  if (!raw_name.compare("iPad2,2"))
-    return std::string("iPad 2 (GSM)");
-  if (!raw_name.compare("iPad2,3"))
-    return std::string("iPad 2 (CDMA)");
-  if (!raw_name.compare("iPad2,4"))
-    return std::string("iPad 2 (WiFi)");
-  if (!raw_name.compare("iPad2,5"))
-    return std::string("iPad Mini (WiFi)");
-  if (!raw_name.compare("iPad2,6"))
-    return std::string("iPad Mini (GSM)");
-  if (!raw_name.compare("iPad2,7"))
-    return std::string("iPad Mini (GSM+CDMA)");
-  if (!raw_name.compare("iPad3,1"))
-    return std::string("iPad 3 (WiFi)");
-  if (!raw_name.compare("iPad3,2"))
-    return std::string("iPad 3 (GSM+CDMA)");
-  if (!raw_name.compare("iPad3,3"))
-    return std::string("iPad 3 (GSM)");
-  if (!raw_name.compare("iPad3,4"))
-    return std::string("iPad 4 (WiFi)");
-  if (!raw_name.compare("iPad3,5"))
-    return std::string("iPad 4 (GSM)");
-  if (!raw_name.compare("iPad3,6"))
-    return std::string("iPad 4 (GSM+CDMA)");
-  if (!raw_name.compare("iPad4,1"))
-    return std::string("iPad Air (WiFi)");
-  if (!raw_name.compare("iPad4,2"))
-    return std::string("iPad Air (Cellular)");
-  if (!raw_name.compare("iPad4,4"))
-    return std::string("iPad mini 2G (WiFi)");
-  if (!raw_name.compare("iPad4,5"))
-    return std::string("iPad mini 2G (Cellular)");
-  if (!raw_name.compare("i386"))
-    return std::string("Simulator");
-  if (!raw_name.compare("x86_64"))
-    return std::string("Simulator");
-  LOG(LS_WARNING) << "Failed to find device name (" << raw_name << ")";
-  return raw_name;
+  return std::string(LookUpRealName(machine.get()));
+}
+
+std::string GetProcessName() {
+  NSString* processName = [NSProcessInfo processInfo].processName;

[tkchin_webrtc, 2016/02/23 17:39:27]

The conversion to std::string seems unneeded because we're just printing a bunch
of these functions.
Also this file's methods feel like they should be moved to webrtc/base/objc
instead.

However, I think it's okay to consolidate that later and just address the
preferred rates change now as-is. Can you file a bug to track that work though?
(Consolidate helpers_ios into webrtc/base/objc, allow modules/audio_device/ios
to depend on webrtc/base/objc).

[henrika_webrtc, 2016/02/24 11:52:47]

Filed https://bugs.chromium.org/p/webrtc/issues/detail?id=5582.

+  return StdStringFromNSString(processName);
+}
+
+int GetProcessID() {
+  return [NSProcessInfo processInfo].processIdentifier;
+}
+
+std::string GetOSVersionString() {
+  NSString* osVersion =
+      [NSProcessInfo processInfo].operatingSystemVersionString;
+  return StdStringFromNSString(osVersion);
+}
+
+int GetProcessorCount() {
+  return [NSProcessInfo processInfo].processorCount;
+}
+
+bool GetLowPowerModeEnabled() {
+  return [NSProcessInfo processInfo].lowPowerModeEnabled;
 }
 
 }  // namespace ios
 }  // namespace webrtc
 
 #endif  // defined(WEBRTC_IOS)