- today's changes

src/bt_call_controller.py

@@ -63,10 +63,11 @@ def set_headset_mic_volume(vol: float):
 
 
 # Function to get the phone stream index to capture the downlink.
-def get_headset_spk_idx():
+def get_headset_spk_idx(timeout: int = 10):
     utils.log('Waiting for phone stream index (please ensure all PA Bluetooth modules are loaded before)... ')
     phoneIdx = ''
-    while phoneIdx == '':
+    startTime = time.time()
+    while phoneIdx == '' and (time.time() - startTime < timeout):
         time.sleep(1)
         # grep 1-4 digit
         phoneIdx = os.popen('pacmd list-sink-inputs | grep -B5 alsa_output | grep index | grep -oP "[0-9]{1,4}"').read()
@@ -116,6 +117,9 @@ def answer_call(play_file: str):
 # Record downlink.
 def capture_phone_alsaoutput(output_path: str):
     default_output = get_headset_spk_idx().rstrip('\n')
+    if default_output == '':
+        return None
+    
     cmd = f'parec --monitor-stream={default_output} --file-format=wav {output_path}'
     utils.log(cmd)
     # Example: parec --monitor-stream=34 --file-format=wav sample1.wav
@@ -281,6 +285,11 @@ def run(play_file: str, record_file: str, timelimit_seconds: int, target: str):
     # Start recording
     utils.log(f'Start recording with ALSA to {record_file}')
     process_recording = capture_phone_alsaoutput(record_file)
+    if process_recording is None:
+        utils.log_error(f'Failed to start recording downlink, exiting.')
+        cleanup()
+        return
+    
     utils.log(f'Main loop PID: {os.getpid()}, TID: {threading.get_ident()}')
     
     # Wait until call is finished