audioengine.py

audioengine.py

from objc_util import *
AVAudioEngine = ObjCClass('AVAudioEngine').alloc().init()
AVAudioSession = ObjCClass('AVAudioSession')
AVAudioRecorder = ObjCClass('AVAudioRecorder')

shared_session = AVAudioSession.sharedInstance()
category_set= shared_session.setCategory_withOptions_error_(
	ns('AVAudioSessionCategoryRecord'), 
	0x2, #duckothers
	None)
shared_session.setMode_error_(ns('AVAudioSessionModeMeasurement'),None)

setActiveOptions = 0# notifyOthersOnDeactivation
shared_session.setActive_withOptions_error_(True,setActiveOptions,None)

inputNode = AVAudioEngine.inputNode()

# Configure the microphone input.
recordingFormat = inputNode.outputFormatForBus_(0)

def handler(_cmd,obj1_ptr,obj2_ptr):
	# param1 = AVAudioPCMBuffer
	#   The buffer parameter is a buffer of audio captured 
	#   from the output of an AVAudioNode.
	# param2 = AVAudioTime
	#   The when parameter is the time the buffer was captured  
	if obj1_ptr:
		obj1 = ObjCInstance(obj1_ptr)
		#self.recognitionRequest?.append(buffer)

handler_block = ObjCBlock(handler, restype=None, argtypes=[c_void_p, c_void_p, c_void_p])

inputNode.installTapOnBus_bufferSize_format_block_(0,1024,recordingFormat, handler_block)

AVAudioEngine.prepare()
err_ptr = c_void_p()
AVAudioEngine.startAndReturnError_(byref(err_ptr))
if err_ptr:
	err = ObjCInstance(err)
	print(err)

# Create and configure the speech recognition request.
recognitionRequest = ObjCClass('SFSpeechAudioBufferRecognitionRequest').alloc()
print(dir(recognitionRequest))
recognitionRequest.setShouldReportPartialResults_(True)