text: #
  # Copyright 2021 Picovoice Inc.
  #
  # You may not use this file except in compliance with the license. A copy of the license is located in the "LICENSE"
  # file accompanying this source.
  #
  # Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
  # an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
  # specific language governing permissions and limitations under the License.
  #
  
  import os
  import platform
  import subprocess
  
  
  def _pv_linux_machine(machine):
      if machine == 'x86_64':
          return machine
  
      if machine == 'aarch64':
          arch_info = '-' + machine
      else:
          arch_info = ''
  
      cpu_info = subprocess.check_output(['cat', '/proc/cpuinfo']).decode()
      cpu_part_list = [x for x in cpu_info.split('\n') if 'CPU part' in x]
      if len(cpu_part_list) == 0:
          raise RuntimeError('Unsupported CPU.\n%s' % cpu_info)
  
      cpu_part = cpu_part_list[0].split(' ')[-1].lower()
      if '0xb76' == cpu_part:
          return 'arm11' + arch_info
      elif '0xc07' == cpu_part:
          return 'cortex-a7' + arch_info
      elif '0xd03' == cpu_part:
          return 'cortex-a53' + arch_info
      elif '0xd07' == cpu_part:
          return 'cortex-a57' + arch_info
      elif '0xd08' == cpu_part:
          return 'cortex-a72' + arch_info
      elif '0xc08' == cpu_part:
          return 'beaglebone' + arch_info
  
      raise NotImplementedError('Unsupported CPU.\n%s' % cpu_info)
  
  
  def _pv_platform():
      pv_system = platform.system()
      if pv_system not in {'Darwin', 'Linux', 'Windows'}:
          raise ValueError("Unsupported system '%s'." % pv_system)
  
      if pv_system == 'Linux':
          pv_machine = _pv_linux_machine(platform.machine())
      else:
          pv_machine = platform.machine()
  
      return pv_system, pv_machine
  
  
  _PV_SYSTEM, _PV_MACHINE = _pv_platform()
  
  _RASPBERRY_PI_MACHINES = {'arm11', 'cortex-a7', 'cortex-a53', 'cortex-a72', 'cortex-a53-aarch64', 'cortex-a72-aarch64'}
  _JETSON_MACHINES = {'cortex-a57-aarch64'}
  
  
  def pv_library_path(relative):
      if _PV_SYSTEM == 'Darwin':
          if _PV_MACHINE == 'x86_64':
              return os.path.join(os.path.dirname(__file__), relative, 'lib/mac/x86_64/libpv_cobra.dylib')
          elif _PV_MACHINE == "arm64":
              return os.path.join(os.path.dirname(__file__), relative, 'lib/mac/arm64/libpv_cobra.dylib')
      elif _PV_SYSTEM == 'Linux':
          if _PV_MACHINE == 'x86_64':
              return os.path.join(os.path.dirname(__file__), relative, 'lib/linux/x86_64/libpv_cobra.so')
          elif _PV_MACHINE in _JETSON_MACHINES:
              return os.path.join(
                  os.path.dirname(__file__),
                  relative,
                  'lib/jetson/%s/libpv_cobra.so' % _PV_MACHINE)
          elif _PV_MACHINE in _RASPBERRY_PI_MACHINES:
              return os.path.join(
                  os.path.dirname(__file__),
                  relative,
                  'lib/raspberry-pi/%s/libpv_cobra.so' % _PV_MACHINE)
          elif _PV_MACHINE == 'beaglebone':
              return os.path.join(os.path.dirname(__file__), relative, 'lib/beaglebone/libpv_cobra.so')
      elif _PV_SYSTEM == 'Windows':
          return os.path.join(os.path.dirname(__file__), relative, 'lib/windows/amd64/libpv_cobra.dll')
  
      raise NotImplementedError('Unsupported platform.')
  