openCom-Companion/sbapp/plyer/platforms/macosx/audio.py

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from os.path import join
from pyobjus import autoclass
from pyobjus.dylib_manager import INCLUDE, load_framework
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from sbapp.plyer.facades import Audio
from sbapp.plyer.platforms.macosx.storagepath import OSXStoragePath
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load_framework(INCLUDE.Foundation)
load_framework(INCLUDE.AVFoundation)
AVAudioPlayer = autoclass("AVAudioPlayer")
AVAudioRecorder = autoclass("AVAudioRecorder")
AVAudioFormat = autoclass("AVAudioFormat")
NSString = autoclass('NSString')
NSURL = autoclass('NSURL')
NSError = autoclass('NSError').alloc()
class OSXAudio(Audio):
def __init__(self, file_path=None):
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default_path = None
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super().__init__(file_path or default_path)
self._recorder = None
self._player = None
self._current_file = None
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self._check_thread = None
self._finished_callback = None
def _check_playback(self):
while self._player and self._player.isPlaying:
time.sleep(0.25)
if self._finished_callback and callable(self._finished_callback):
self._check_thread = None
self._finished_callback(self)
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def _start(self):
# Conversion of Python file path string to Objective-C NSString
file_path_NSString = NSString.alloc()
file_path_NSString = file_path_NSString.initWithUTF8String_(
self._file_path
)
# Definition of Objective-C NSURL object for the output record file
# specified by NSString file path
file_NSURL = NSURL.alloc()
file_NSURL = file_NSURL.initWithString_(file_path_NSString)
# Internal audio file format specification
af = AVAudioFormat.alloc()
af = af.initWithCommonFormat_sampleRate_channels_interleaved_(
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1, 44100.0, 1, True
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)
# Audio recorder instance initialization with specified file NSURL
# and audio file format
self._recorder = AVAudioRecorder.alloc()
self._recorder = self._recorder.initWithURL_format_error_(
file_NSURL, af, NSError
)
if not self._recorder:
raise Exception(NSError.code, NSError.domain)
self._recorder.record()
# Setting the currently recorded file as current file
# for using it as a parameter in audio player
self._current_file = file_NSURL
def _stop(self):
if self._recorder:
self._recorder.stop()
self._recorder = None
if self._player:
self._player.stop()
self._player = None
def _play(self):
# Audio player instance initialization with the file NSURL
# of the last recorded audio file
self._player = AVAudioPlayer.alloc()
self._player = self._player.initWithContentsOfURL_error_(
self._current_file, NSError
)
if not self._player:
raise Exception(NSError.code, NSError.domain)
self._player.play()
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self._check_thread = threading.Thread(target=self._check_playback, daemon=True)
self._check_thread.start()
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def instance():
return OSXAudio()