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Handle the case when the piper process generates no data for an utterrance

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Kovid Goyal 2024-09-01 21:57:29 +05:30
parent c287218d08
commit de25e2bcfb
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 22 additions and 10 deletions
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32
src/calibre/gui2/tts2/piper.py
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@ -133,6 +133,7 @@ class UtteranceAudioQueue(QIODevice):
def readData(self, maxlen: int) -> QByteArray:
if maxlen < 1:
debug(f'Audio data sent to output: {maxlen=}')
return QByteArray()
if maxlen >= len(self.current_audio_data):
ans = self.current_audio_data
@ -142,6 +143,7 @@ class UtteranceAudioQueue(QIODevice):
self.current_audio_data = self.current_audio_data.last(len(self.current_audio_data) - maxlen)
if len(self.current_audio_data):
self.readyRead.emit()
debug(f'Audio sent to output: {maxlen=} {len(ans)=}')
return ans
@ -186,6 +188,7 @@ def split_into_utterances(text: str, counter: count, lang: str = 'en'):
class Piper(TTSBackend):
engine_name: str = 'piper'
_synthesis_done = pyqtSignal()
def __init__(self, engine_name: str = '', parent: QObject|None = None):
super().__init__(parent)
@ -203,6 +206,7 @@ class Piper(TTSBackend):
self._pending_stderr_data = b''
self._stderr_pat = re.compile(rb'\[piper\] \[([a-zA-Z0-9_]+?)\] (.+)')
self._synthesis_done.connect(self._utterance_synthesized, type=Qt.ConnectionType.QueuedConnection)
atexit.register(self.shutdown)
def say(self, text: str) -> None:
@ -281,9 +285,11 @@ class Piper(TTSBackend):
rate = 1.0 # TODO: Make rate configurable
cmdline = list(piper_cmdline()) + [
'--model', model_path, '--output-raw', '--json-input', '--sentence-silence', '0', '--length_scale', str(rate)]
if is_debugging():
cmdline.append('--debug')
self._process.setProgram(cmdline[0])
self._process.setArguments(cmdline[1:])
self._process.readyReadStandardError.connect(self.piper_stderr_available, type=Qt.ConnectionType.QueuedConnection)
self._process.readyReadStandardError.connect(self.piper_stderr_available)
self._process.readyReadStandardOutput.connect(self.piper_stdout_available)
self._process.bytesWritten.connect(self.bytes_written)
# See https://www.riverbankcomputing.com/pipermail/pyqt/2024-September/046002.html
@ -305,10 +311,10 @@ class Piper(TTSBackend):
ba = self.process.readAll()
if not len(ba):
break
debug('Synthesized data read:', len(ba), 'bytes')
u.audio_data.append(ba)
def piper_stderr_available(self) -> None:
needs_status_update = False
if self._process is not None:
data = self._pending_stderr_data + bytes(self._process.readAllStandardError())
lines = data.split(b'\n')
@ -316,18 +322,24 @@ class Piper(TTSBackend):
if m := self._stderr_pat.search(line):
which, payload = m.group(1), m.group(2)
if which == b'info':
debug(f'[piper-info] {payload.decode("utf-8", "replace")}')
if payload.startswith(b'Real-time factor:') and self._utterances_being_synthesized:
u = self._utterances_being_synthesized.popleft()
u.synthesized = True
debug(f'Utterance {u.id} synthesized')
needs_status_update = True
self._utterances_being_spoken.add_utterance(u)
self._write_current_utterance()
self._synthesis_done.emit()
elif which == b'error':
self._errors_from_piper.append(payload.decode('utf-8', 'replace'))
elif which == b'debug':
debug(f'[piper-debug] {payload.decode("utf-8", "replace")}')
self._pending_stderr_data = lines[-1]
if needs_status_update:
self._update_status()
def _utterance_synthesized(self):
self.piper_stdout_available() # just in case
u = self._utterances_being_synthesized.popleft()
u.synthesized = True
debug(f'Utterance {u.id} got {len(u.audio_data)} bytes of audio data from piper')
if len(u.audio_data):
self._utterances_being_spoken.add_utterance(u)
self._write_current_utterance()
self._update_status()
def _update_status(self):
if self._process is not None and self._process.state() is QProcess.ProcessState.NotRunning: