_eloquence.py

import time
import logging
import ctypes
from io import StringIO, BytesIO

gb = BytesIO()
empty_gb = BytesIO()
empty_gb.write(b'\0\0')
onIndexReached = None
speaking=False
lang='enu'
from ctypes import *
import config
from ctypes import wintypes
import threading, os, queue, re
import nvwave

user32 = windll.user32
eci = None
tid = None
bgt = None
samples=3300
buffer = create_string_buffer(samples*2)
bgQueue = queue.Queue()
synth_queue = queue.Queue()
stopped = threading.Event()
started = threading.Event()
param_event = threading.Event()
Callback = WINFUNCTYPE(c_int, c_int, c_int, c_int, c_void_p)
hsz=1
pitch=2
fluctuation=3
rgh=4
bth=5
rate=6
vlm=7
lastindex=0
langs={'esm': (131073, 'Latin American Spanish'),
'esp': (131072, 'Castilian Spanish'),
'ptb': (458752, 'Brazilian Portuguese'),
'frc': (196609, 'French Canadian'),
'fra': (196608, 'French'),
'fin': (589824, 'Finnish'),
'deu': (262144, 'German'),
'ita': (327680, 'Italian'),
'enu': (65536, 'American English'),
'eng': (65537, 'British English')}
avLangs=0
eciPath=0
WM_PROCESS=1025
WM_SILENCE = 1026
WM_PARAM = 1027
WM_VPARAM=1028
WM_COPYVOICE=1029
WM_KILL=1030
WM_SYNTH=1031
WM_INDEX=1032
params = {}
vparams = {}

audio_queue = queue.Queue()
#We can only have one of each in NVDA. Make this global
dll = None
handle = None

class eciThread(threading.Thread):
 def run(self):
  global vparams, params, speaking
  global tid, dll, handle
  tid = windll.kernel32.GetCurrentThreadId()
  msg = wintypes.MSG()
  user32.PeekMessageA(byref(msg), None, 0x400, 0x400, 0)
  (dll, handle) = eciNew()
  dll.eciRegisterCallback(handle, callback, None)
  dll.eciSetOutputBuffer(handle, samples, pointer(buffer))
  dll.eciSetParam(handle,1, 1)
  self.dictionaryHandle = dll.eciNewDict(handle)
  dll.eciSetDict(handle, self.dictionaryHandle)
  #0 = main dictionary
  if os.path.exists(os.path.join(os.path.dirname(eciPath), "main.dic")):
   dll.eciLoadDict(handle, self.dictionaryHandle, 0, os.path.join(os.path.dirname(eciPath), "main.dic").encode('mbcs'))
  if os.path.exists(os.path.join(os.path.dirname(eciPath), "root.dic")):
   dll.eciLoadDict(handle, self.dictionaryHandle, 1, os.path.join(os.path.dirname(eciPath), "root.dic").encode('mbcs'))
  params[9] = dll.eciGetParam(handle, 9)
  started.set()
  while True:
   user32.GetMessageA(byref(msg), 0, 0, 0)
   user32.TranslateMessage(byref(msg))
   if msg.message == WM_PROCESS:
    internal_process_queue()
   elif msg.message == WM_SILENCE:
    speaking=False
    gb.seek(0)
    gb.truncate(0)
    dll.eciStop(handle)
    try:
     while True:
      bgQueue.get_nowait()
    except:
      pass
    player.stop()
   elif msg.message == WM_PARAM:
    dll.eciSetParam(handle, msg.lParam, msg.wParam)
    params[msg.lParam] = msg.wParam
    param_event.set()
   elif msg.message == WM_VPARAM:
    setVParamImpl(param=msg.wParam, val=msg.lParam)
    param_event.set()
   elif msg.message == WM_COPYVOICE:
    dll.eciCopyVoice(handle, msg.wParam, 0)
    for i in (rate, pitch, vlm, fluctuation, hsz, rgh, bth):
     vparams[i] = dll.eciGetVoiceParam(handle, 0, i)
    param_event.set()
   elif msg.message == WM_KILL:
    dll.eciDelete(handle)
    stopped.set()
    break
   else:
    user32.DispatchMessageA(byref(msg))

def eciCheck():
 global eciPath
 eciPath=os.path.abspath(os.path.join(os.path.dirname(__file__), r"eloquence\eci.dll"))
 iniCheck()
 return os.path.exists(eciPath)

def iniCheck():
 ini=open(eciPath[:-3]+"ini","r+")
 ini.seek(12)
 tml=ini.readline()
 if tml[:-9] != eciPath[:-8]:
  ini.seek(12)
  tmp=ini.read()
  ini.seek(12)
  ini.write(tmp.replace(tml[:-9], eciPath[:-8]))
  ini.truncate()
 ini.close()

def eciNew():
 global avLangs
 eciCheck()
 eci = windll.LoadLibrary(eciPath)
 b=c_int()
 eci.eciGetAvailableLanguages(0,byref(b))
 avLangs=(c_int*b.value)()
 eci.eciGetAvailableLanguages(byref(avLangs),byref(b))
 if 'eci' in config.conf['speech'] and config.conf['speech']['eci']['voice'] != '': handle=eci.eciNewEx(langs[config.conf['speech']['eci']['voice']][0])
 else: handle=eci.eciNewEx(langs[lang][0])
 for i in (rate, pitch, vlm, fluctuation):
  vparams[i] = eci.eciGetVoiceParam(handle, 0, i)
 return eci,handle

@WINFUNCTYPE(c_int,c_int,c_int,c_long,c_void_p)
def _bgExec(func, *args, **kwargs):
 global bgQueue
 bgQueue.put((func, args, kwargs))
def setLast(lp):
 global lastindex
 lastindex = lp
 #we can use this to set player idle
# player.idle()
def bgPlay(stri, onDone=None):
 if len(stri) == 0: return
 # Sometimes player.feed() tries to open the device when it's already open,
 # causing a WindowsError. This code catches and works around this.
 # [DGL, 2012-12-18 with help from Tyler]
 tries = 0
 while tries < 10:
  try:
   player.feed(stri, onDone=onDone)
   if tries > 0:
    logging.warn("Eloq speech retries: %d" % (tries))
   return
  except:
   player.idle()
   time.sleep(0.02)
   tries += 1
 logging.error("Eloq speech failed to feed one buffer.")

def flush(updateIndex=False, index=None):
 onDone = None
 if updateIndex:
  onDone = lambda i=index: onIndexReached(i)
 this_gb = gb if gb.tell() > 0 else empty_gb
 _bgExec(bgPlay,
  this_gb.getvalue(),
  onDone=onDone,
 )
 gb.seek(0)
 gb.truncate(0)
 if updateIndex and index is not None:
  _bgExec(setLast, index)



curindex=None
@Callback
def callback (h, ms, lp, dt):
 global gb, curindex, speaking
 if not speaking:
  return 2
 #We need to buffer x amount of audio, and send the indexes after it.
 #Accuracy is lost with this method, but it should stop the say all breakage.
 if speaking and ms == 0: #audio data
  if gb.tell() >= samples*2:
   flush()
  gb.write(string_at(buffer, lp*2))
 elif ms==2: #index
  if lp != 0xffff: #end of string
   curindex = lp
   flush(updateIndex=True, index=curindex)
  else: #We reached the end of string
   flush(updateIndex=True, index=None)
 return 1

class BgThread(threading.Thread):
 def __init__(self):
  threading.Thread.__init__(self)
  self.setDaemon(True)

 def run(self):
  global isSpeaking
  try:
   while True:
    func, args, kwargs = bgQueue.get()
    if not func:
     break
    func(*args, **kwargs)
    bgQueue.task_done()
  except:
   logging.error("bgThread.run", exc_info=True)

def _bgExec(func, *args, **kwargs):
 global bgQueue
 bgQueue.put((func, args, kwargs))
def str2mem(str):
 buf = c_buffer(str)
 blen = sizeof(buf)
 ptr = windll.kernel32.GlobalAlloc(0x40, blen)
 cdll.msvcrt.memcpy(ptr, ctypes.addressof(buf), blen)
 return ptr

def initialize(indexCallback=None):
 global eci, player, bgt, dll, handle, onIndexReached

 onIndexReached = indexCallback
 player = nvwave.WavePlayer(1, 11025, 16, outputDevice=config.conf["speech"]["outputDevice"])
 eci = eciThread()
 eci.start()
 started.wait()
 started.clear()
 bgt = BgThread()
 bgt.start()

def speak(text):
 #Sometimes the synth slows down for one string of text. Why?
 #Trying to fix it here.
 if rate in vparams: text = "`vs%d" % (vparams[rate],)+text
 text = text.encode("mbcs")

 dll.eciAddText(handle, text)

def index(x):
 dll.eciInsertIndex(handle, x)
 
def cmdProsody(pr, multiplier):
 value = getVParam(pr)
 if multiplier:
  value = int(value * multiplier)
 setVParam(pr, value, temporary=True)

def synth():
 global speaking
 speaking = True
 dll.eciSynthesize(handle)

def stop():
 user32.PostThreadMessageA(tid, WM_SILENCE, 0, 0)

def pause(switch):
 player.pause(switch)

def terminate():
 global bgt, player
 user32.PostThreadMessageA(tid, WM_KILL, 0, 0)
 stopped.wait()
 stopped.clear()
 bgQueue.put((None, None, None))
 eci.join()
 bgt.join()
 player.close()
 player = None
 bgt = None

def set_voice(vl):
  user32.PostThreadMessageA(tid, WM_PARAM, int(vl), 9)

def getVParam(pr):
 return vparams[pr]
 
def  isInEciThread():
 return tid == windll.kernel32.GetCurrentThreadId()

def setVParam(pr, vl, temporary=False):
 if isInEciThread():
  # We are running inside eciThread, so do it synchronously
  setVParamImpl(pr, vl, temporary)
 else:
  # Send a message to eciThread
  assert(not temporary, "Can only set vParams permanently from another thread.")
  user32.PostThreadMessageA(tid, WM_VPARAM, pr, vl)
  param_event.wait()
  param_event.clear()
  
def setVParamImpl(param, val, temporary=False):
    global handle
    dll.eciSetVoiceParam(handle, 0, param, val)
    if not temporary:
     vparams[param] = val
     
def setVariant(v):
 user32.PostThreadMessageA(tid, WM_COPYVOICE, v, 0)
 param_event.wait()
 param_event.clear()

def process():
  user32.PostThreadMessageA(tid, WM_PROCESS, 0, 0)

def internal_process_queue():
 lst = synth_queue.get()
 for (func, args) in lst:
  func(*args)