xbmc/platform/android/CPUInfoAndroid.cpp

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "CPUInfoAndroid.h"
  10
  11 #include "URL.h"
  12 #include "cpu-features.h"
  13 #include "utils/StringUtils.h"
  14
  15 #include <array>
  16
  17 std::shared_ptr<CCPUInfo> CCPUInfo::GetCPUInfo()
  18 {
  19   return std::make_shared<CCPUInfoAndroid>();
  20 }
  21
  22 CCPUInfoAndroid::CCPUInfoAndroid() : m_posixFile(std::make_unique<CPosixFile>())
  23 {
  24   if (m_posixFile && m_posixFile->Open(CURL("/proc/cpuinfo")))
  25   {
  26     std::array<char, 2048> buffer = {};
  27
  28     if (0 < m_posixFile->Read(buffer.data(), buffer.size()))
  29     {
  30       for (const auto& line : StringUtils::Split(buffer.data(), '\n'))
  31       {
  32         if (line.find("vendor_id") != std::string::npos)
  33           m_cpuVendor = line.substr(line.find(':') + 2);
  34
  35         else if (line.find("model name") != std::string::npos)
  36           m_cpuModel = line.substr(line.find(':') + 2);
  37
  38         else if (line.find("BogoMIPS") != std::string::npos)
  39           m_cpuBogoMips = line.substr(line.find(':') + 2);
  40
  41         else if (line.find("Hardware") != std::string::npos)
  42           m_cpuHardware = line.substr(line.find(':') + 2);
  43
  44         else if (line.find("Serial") != std::string::npos)
  45           m_cpuSerial = line.substr(line.find(':') + 2);
  46
  47         else if (line.find("Revision") != std::string::npos)
  48           m_cpuRevision = line.substr(line.find(':') + 2);
  49       }
  50     }
  51
  52     m_posixFile->Close();
  53   }
  54
  55   m_cpuCount = GetCPUCount();
  56
  57   for (int i = 0; i < m_cpuCount; i++)
  58   {
  59     CoreInfo core;
  60     core.m_id = i;
  61     m_cores.emplace_back(core);
  62   }
  63
  64   if (HasNeon())
  65     m_cpuFeatures |= CPU_FEATURE_NEON;
  66 }
  67
  68 float CCPUInfoAndroid::GetCPUFrequency()
  69 {
  70   float freq = 0.f;
  71
  72   if (!m_posixFile)
  73     return freq;
  74
  75   if (m_posixFile->Open(CURL("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq")))
  76   {
  77     std::array<char, 32> buffer = {};
  78
  79     if (0 < m_posixFile->Read(buffer.data(), buffer.size()))
  80       freq = std::atof(buffer.data()) / 1000;
  81
  82     m_posixFile->Close();
  83   }
  84
  85   return freq;
  86 }
  87
  88 int CCPUInfoAndroid::GetCPUCount()
  89 {
  90   static int count = -1;
  91
  92   if (count == -1)
  93     count = android_getCpuCount();
  94
  95   return count;
  96 }
  97
  98 bool CCPUInfoAndroid::HasNeon()
  99 {
 100   // All ARMv8-based devices support Neon - https://developer.android.com/ndk/guides/cpu-arm-neon
 101   if (android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM64)
 102     return true;
 103
 104   if (android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM)
 105     return ((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0);
 106
 107   return false;
 108 }