An NVDA synth driver which logs time stamped speech output.

logger.py

import os
import time
from collections import OrderedDict
import wx
import synthDriverHandler
from synthDriverHandler import synthIndexReached, synthDoneSpeaking
from speech.commands import IndexCommand
import globalVars

class SynthDriver(synthDriverHandler.SynthDriver):
	"""A synth driver which logs time stamped speech output.
	"""
	name = "logger"
	# Translators: Description for a speech synthesizer.
	description = _("Logger")

	@classmethod
	def check(cls):
		return True

	supportedSettings = frozenset()
	_availableVoices = OrderedDict({name: synthDriverHandler.VoiceInfo(name, description)})

	def __init__(self):
		self._log = open(
			os.path.join(globalVars.appDir, "speech.log"),
			"wt",
			encoding="UTF-8"
		)

	def terminate(self):
		self._log.close()

	def speak(self, speechSequence):
		textList = []
		for item in speechSequence:
			if isinstance(item, IndexCommand):
				synthIndexReached.notify(synth=self, index=item.index)
			elif isinstance(item, str):
				textList.append(item)
		t = time.time()
		text = " ".join(textList)
		self._log.write(f"{t} {text}\n")
		synthDoneSpeaking.notify(synth=self)

	def _get_voice(self):
		return self.name