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More work on TTS backends

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Kovid Goyal 2024-08-26 13:08:43 +05:30
parent b2f3356997
commit 3f9febc9ec
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GPG Key ID: 06BC317B515ACE7C
2 changed files with 21 additions and 5 deletions
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8
src/calibre/gui2/tts2/qt.py
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@ -85,6 +85,14 @@ class QtTTSBackend(QObject):
self.tts.sayingWord.connect(self._saying_word)
self.tts.stateChanged.connect(self.state_changed.emit)
def change_rate(self, steps: int = 1) -> bool:
current = self.tts.rate()
new_rate = max(-1, min(current + 0.2 * steps, 1))
if current == new_rate:
return False
self.tts.setRate(new_rate)
return True
def shutdown(self) -> None:
self.tts.stop(QTextToSpeech.BoundaryHint.Immediate)

18
src/calibre/gui2/tts2/types.py
View File

@ -1,6 +1,7 @@
#!/usr/bin/env python
# License: GPLv3 Copyright: 2024, Kovid Goyal <kovid at kovidgoyal.net>
import os
from enum import Enum, auto
from functools import lru_cache
from typing import Literal, NamedTuple
@ -23,7 +24,6 @@ class EngineMetadata(NamedTuple):
allows_choosing_audio_device: bool = True
can_synthesize_audio_data: bool = True
has_multiple_output_modules: bool = False
can_change_rate: bool = True
can_change_pitch: bool = True
can_change_volume: bool = True
@ -92,7 +92,12 @@ def available_engines() -> dict[str, EngineMetadata]:
elif x == 'flite':
ans[x] = qt_engine_metadata(x, True)
elif x == 'speechd':
ans[x] = EngineMetadata(x, TrackingCapability.WordByWord, allows_choosing_audio_device=False, has_multiple_output_modules=True)
continue
if islinux:
from speechd.paths import SPD_SPAWN_CMD
cmd = os.getenv("SPEECHD_CMD", SPD_SPAWN_CMD)
if cmd and os.access(cmd, os.X_OK) and os.path.isfile(cmd):
ans['speechd'] = EngineMetadata('speechd', TrackingCapability.WordByWord, allows_choosing_audio_device=False, has_multiple_output_modules=True)
return ans
@ -101,11 +106,14 @@ def create_tts_backend(engine_name: str = '', settings: EngineSpecificSettings =
engine_name = 'speechd'
if engine_name not in available_engines():
engine_name = ''
if engine_name == 'speechd':
from calibre.gui2.tts2.speechd import SpeechdTTSBackend
return SpeechdTTSBackend(engine_name, settings, parent)
from calibre.gui2.tts2.qt import QtTTSBackend
return QtTTSBackend(engine_name, settings, parent)
ans = SpeechdTTSBackend(engine_name, settings, parent)
else:
from calibre.gui2.tts2.qt import QtTTSBackend
ans = QtTTSBackend(engine_name, settings, parent)
return ans
def develop(engine_name=''):