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Implement TTS speed buttons in browser viewer

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Kovid Goyal 2020-12-10 11:34:06 +05:30
parent 21eb7a9dcd
commit 706e229558
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GPG Key ID: 06BC317B515ACE7C
2 changed files with 34 additions and 10 deletions
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1
src/pyj/read_book/read_aloud.pyj
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@ -214,6 +214,7 @@ class ReadAloud:
self.state = STOPPED self.state = STOPPED
self.view.show_next_spine_item() self.view.show_next_spine_item()
elif which is 'configured': elif which is 'configured':
self.focus()
if self.waiting_for_configure: if self.waiting_for_configure:
self.play() self.play()
if data is not None: if data is not None:

43
src/pyj/read_book/tts.pyj
View File

@ -25,6 +25,9 @@ escape_for_xml = escaper()
class Client: class Client:
min_rate = 0.1
max_rate = 2
def __init__(self): def __init__(self):
self.stop_requested_at = None self.stop_requested_at = None
self.status = {'synthesizing': False, 'paused': False} self.status = {'synthesizing': False, 'paused': False}
@ -143,6 +146,34 @@ class Client:
if self.queue.length: if self.queue.length:
window.speechSynthesis.speak(self.queue[0]) window.speechSynthesis.speak(self.queue[0])
def faster(self):
self.change_rate(steps=1)
def slower(self):
self.change_rate(steps=-1)
def apply_settings(self):
sd = get_session_data()
sd.set('tts_backend', {'voice': self.current_voice_uri, 'rate': self.current_rate})
existing = self.queue
if self.queue and self.queue.length:
if self.status.paused:
window.speechSynthesis.resume()
self.stop()
for ut in existing:
self.create_utterance(ut.text)
def change_rate(self, steps=1):
rate = current_rate = (self.current_rate or 1) * 10
step_size = 2
rate += steps * step_size
rate /= 10
rate = max(self.min_rate, min(rate, self.max_rate))
if rate is not current_rate:
self.current_rate = rate
self.apply_settings()
self.resume_after_configure()
def configure(self): def configure(self):
voice_id = unique_id() voice_id = unique_id()
rate_id = unique_id() rate_id = unique_id()
@ -171,7 +202,7 @@ class Client:
option.setAttribute('selected', 'selected') option.setAttribute('selected', 'selected')
select.appendChild(option) select.appendChild(option)
parent_div.appendChild(E.div(_('Speed of speech:'))) parent_div.appendChild(E.div(_('Speed of speech:')))
parent_div.appendChild(E.input(type='range', id=rate_id, min='1', max='20', value=((self.current_rate or 1) * 10) + '')) parent_div.appendChild(E.input(type='range', id=rate_id, min=(self.min_rate * 10) + '', max=(self.max_rate * 10) + '', value=((self.current_rate or 1) * 10) + ''))
parent_div.appendChild(E.div(_('Pick a voice below:'))) parent_div.appendChild(E.div(_('Pick a voice below:')))
parent_div.appendChild(select) parent_div.appendChild(select)
if select.options.selectedIndex?: if select.options.selectedIndex?:
@ -193,15 +224,7 @@ class Client:
if changed: if changed:
self.current_voice_uri = voice self.current_voice_uri = voice
self.current_rate = rate self.current_rate = rate
sd = get_session_data() self.apply_settings()
sd.set('tts_backend', {'voice': voice, 'rate': rate})
existing = self.queue
if self.queue and self.queue.length:
if self.status.paused:
window.speechSynthesis.resume()
self.stop()
for ut in existing:
self.create_utterance(ut.text)
self.onevent('configured') self.onevent('configured')
) )