text: #
  # Copyright 2020-2022 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 logging
  import os
  import platform
  import subprocess
  
  
  log = logging.getLogger('PPN')
  log.setLevel(logging.WARNING)
  
  
  def _pv_linux_machine(machine):
      if machine == 'x86_64':
          return machine
      elif machine == 'aarch64':
          arch_info = '-' + machine
      elif machine in ['armv7l', 'armv6l']:
          arch_info = ''
      else:
          raise NotImplementedError("Unsupported CPU architecture: '%s'" % machine)
  
      cpu_info = ''
      try:
          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]
          cpu_part = cpu_part_list[0].split(' ')[-1].lower()
      except Exception as error:
          raise RuntimeError("Failed to identify the CPU with '%s'\nCPU info: %s" % (error, cpu_info))
  
      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
      elif machine == 'armv7l':
          log.warning(
              'WARNING: Please be advised that this device (CPU part = %s) is not officially supported by Picovoice. '
              'Falling back to the armv6-based (Raspberry Pi Zero) library. This is not tested nor optimal.' % cpu_part)
          return 'arm11'
      else:
          raise NotImplementedError("Unsupported CPU: '%s'." % cpu_part)
  
  
  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_porcupine.dylib')
          elif _PV_MACHINE == "arm64":
              return os.path.join(os.path.dirname(__file__), relative, 'lib/mac/arm64/libpv_porcupine.dylib')
      elif _PV_SYSTEM == 'Linux':
          if _PV_MACHINE == 'x86_64':
              return os.path.join(os.path.dirname(__file__), relative, 'lib/linux/x86_64/libpv_porcupine.so')
          elif _PV_MACHINE in _JETSON_MACHINES:
              return os.path.join(
                  os.path.dirname(__file__),
                  relative,
                  'lib/jetson/%s/libpv_porcupine.so' % _PV_MACHINE)
          elif _PV_MACHINE in _RASPBERRY_PI_MACHINES:
              return os.path.join(
                  os.path.dirname(__file__),
                  relative,
                  'lib/raspberry-pi/%s/libpv_porcupine.so' % _PV_MACHINE)
          elif _PV_MACHINE == 'beaglebone':
              return os.path.join(os.path.dirname(__file__), relative, 'lib/beaglebone/libpv_porcupine.so')
      elif _PV_SYSTEM == 'Windows':
          return os.path.join(os.path.dirname(__file__), relative, 'lib/windows/amd64/libpv_porcupine.dll')
  
      raise NotImplementedError('Unsupported platform.')
  
  
  def pv_model_path(relative):
      return os.path.join(os.path.dirname(__file__), relative, 'lib/common/porcupine_params.pv')
  
  
  def pv_keyword_files_subdir():
      if _PV_SYSTEM == 'Darwin':
          return 'mac'
      elif _PV_SYSTEM == 'Linux':
          if _PV_MACHINE == 'x86_64':
              return 'linux'
          elif _PV_MACHINE in _JETSON_MACHINES:
              return 'jetson'
          elif _PV_MACHINE in _RASPBERRY_PI_MACHINES:
              return 'raspberry-pi'
          elif _PV_MACHINE == 'beaglebone':
              return 'beaglebone'
      elif _PV_SYSTEM == 'Windows':
          return 'windows'
  
      raise NotImplementedError('Unsupported platform')
  
  
  def pv_keyword_paths(relative):
      keyword_files_dir = \
          os.path.join(os.path.dirname(__file__), relative, 'resources/keyword_files', pv_keyword_files_subdir())
  
      res = dict()
      for x in os.listdir(keyword_files_dir):
          res[x.rsplit('_')[0]] = os.path.join(keyword_files_dir, x)
  
      return res
  