openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.
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#!/usr/bin/env python3
import cereal.messaging as messaging
from openpilot.common.params import Params
from openpilot.common.swaglog import cloudlog
from cereal import car
from openpilot.system.micd import SAMPLE_RATE, SAMPLE_BUFFER
FEEDBACK_MAX_DURATION = 10.0
ButtonType = car.CarState.ButtonEvent.Type
def main():
params = Params()
pm = messaging.PubMaster(['userBookmark', 'audioFeedback'])
sm = messaging.SubMaster(['rawAudioData', 'bookmarkButton', 'carState'])
should_record_audio = False
block_num = 0
waiting_for_release = False
early_stop_triggered = False
while True:
sm.update()
should_send_bookmark = False
if sm.updated['carState'] and sm['carState'].canValid:
for be in sm['carState'].buttonEvents:
if be.type == ButtonType.lkas:
if be.pressed:
if not should_record_audio:
if params.get_bool("RecordAudioFeedback"): # Start recording on first press if toggle set
should_record_audio = True
block_num = 0
waiting_for_release = False
early_stop_triggered = False
cloudlog.info("LKAS button pressed - starting 10-second audio feedback")
else:
should_send_bookmark = True # immediately send bookmark if toggle false
cloudlog.info("LKAS button pressed - bookmarking")
elif should_record_audio and not waiting_for_release: # Wait for release of second press to stop recording early
waiting_for_release = True
elif waiting_for_release: # Second press released
waiting_for_release = False
early_stop_triggered = True
cloudlog.info("LKAS button released - ending recording early")
if should_record_audio and sm.updated['rawAudioData']:
raw_audio = sm['rawAudioData']
msg = messaging.new_message('audioFeedback', valid=True)
msg.audioFeedback.audio.data = raw_audio.data
msg.audioFeedback.audio.sampleRate = raw_audio.sampleRate
msg.audioFeedback.blockNum = block_num
block_num += 1
if (block_num * SAMPLE_BUFFER / SAMPLE_RATE) >= FEEDBACK_MAX_DURATION or early_stop_triggered: # Check for timeout or early stop
should_send_bookmark = True # send bookmark at end of audio segment
should_record_audio = False
early_stop_triggered = False
cloudlog.info("10-second recording completed or second button press - stopping audio feedback")
pm.send('audioFeedback', msg)
if sm.updated['bookmarkButton']:
cloudlog.info("Bookmark button pressed!")
should_send_bookmark = True
if should_send_bookmark:
msg = messaging.new_message('userBookmark', valid=True)
pm.send('userBookmark', msg)
if __name__ == '__main__':
main()