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add a small delay before terminating recording

Browse source 
https://forums.ankiweb.net/t/anki-crashes-periodically-after-clicking-record-audio-button/5824/12
This commit is contained in:
Damien Elmes 2020-12-21 16:37:28 +10:00
parent 729293f5e3
commit 7d1c8c29f9
1 changed files with 32 additions and 23 deletions
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55
qt/aqt/sound.py
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@ -530,6 +530,7 @@ class QtAudioInputRecorder(Recorder):
super().__init__(output_path)
self.mw = mw
self._parent = parent
from PyQt5.QtMultimedia import (
QAudio,
@ -567,34 +568,42 @@ class QtAudioInputRecorder(Recorder):
self._buffer += self._iodevice.readAll()
def stop(self, on_done: Callable[[str], None]):
# read anything remaining in buffer & stop
self._on_read_ready()
self._audio_input.stop()
def on_stop_timer():
# read anything remaining in buffer & stop
self._on_read_ready()
self._audio_input.stop()
if err := self._audio_input.error():
showWarning(f"recording failed: {err}")
return
def write_file():
# swallow the first 300ms to allow audio device to quiesce
wait = int(44100 * self.STARTUP_DELAY)
if len(self._buffer) <= wait:
if err := self._audio_input.error():
showWarning(f"recording failed: {err}")
return
self._buffer = self._buffer[wait:]
# write out the wave file
wf = wave.open(self.output_path, "wb")
wf.setnchannels(self._format.channelCount())
wf.setsampwidth(self._format.sampleSize() // 8)
wf.setframerate(self._format.sampleRate())
wf.writeframes(self._buffer)
wf.close()
def write_file():
# swallow the first 300ms to allow audio device to quiesce
wait = int(44100 * self.STARTUP_DELAY)
if len(self._buffer) <= wait:
return
self._buffer = self._buffer[wait:]
def and_then(fut):
fut.result()
Recorder.stop(self, on_done)
# write out the wave file
wf = wave.open(self.output_path, "wb")
wf.setnchannels(self._format.channelCount())
wf.setsampwidth(self._format.sampleSize() // 8)
wf.setframerate(self._format.sampleRate())
wf.writeframes(self._buffer)
wf.close()
self.mw.taskman.run_in_background(write_file, and_then)
def and_then(fut):
fut.result()
Recorder.stop(self, on_done)
self.mw.taskman.run_in_background(write_file, and_then)
# schedule the stop for half a second in the future,
# to avoid truncating the end of the recording
self._stop_timer = t = QTimer(self._parent)
t.timeout.connect(on_stop_timer) # type: ignore
t.setSingleShot(True)
t.start(500)
# PyAudio recording