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Add flush_flag to listener to flush the recorded audio immediately without waiting for the phrase to complete. #761

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Add flush_flag to listener to flush the recorded audio immediately without waiting for the phrase to complete. #761

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11 changes: 8 additions & 3 deletions speech_recognition/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -447,7 +447,7 @@ def snowboy_wait_for_hot_word(self, snowboy_location, snowboy_hot_word_files, so

return b"".join(frames), elapsed_time

def listen(self, source, timeout=None, phrase_time_limit=None, snowboy_configuration=None):
def listen(self, source, timeout=None, phrase_time_limit=None, snowboy_configuration=None, flush_flag=[False]):
"""
Records a single phrase from ``source`` (an ``AudioSource`` instance) into an ``AudioData`` instance, which it returns.

Expand Down Expand Up @@ -515,6 +515,11 @@ def listen(self, source, timeout=None, phrase_time_limit=None, snowboy_configura
pause_count, phrase_count = 0, 0
phrase_start_time = elapsed_time
while True:
if(flush_flag[0]):
flush_flag[0] = False
buffer == b''
break

# handle phrase being too long by cutting off the audio
elapsed_time += seconds_per_buffer
if phrase_time_limit and elapsed_time - phrase_start_time > phrase_time_limit:
Expand Down Expand Up @@ -544,7 +549,7 @@ def listen(self, source, timeout=None, phrase_time_limit=None, snowboy_configura

return AudioData(frame_data, source.SAMPLE_RATE, source.SAMPLE_WIDTH)

def listen_in_background(self, source, callback, phrase_time_limit=None):
def listen_in_background(self, source, callback, flush_flag, phrase_time_limit=None):
"""
Spawns a thread to repeatedly record phrases from ``source`` (an ``AudioSource`` instance) into an ``AudioData`` instance and call ``callback`` with that ``AudioData`` instance as soon as each phrase are detected.

Expand All @@ -561,7 +566,7 @@ def threaded_listen():
with source as s:
while running[0]:
try: # listen for 1 second, then check again if the stop function has been called
audio = self.listen(s, 1, phrase_time_limit)
audio = self.listen(s, 1, phrase_time_limit, flush_flag=flush_flag)
except WaitTimeoutError: # listening timed out, just try again
pass
else:
Expand Down