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CallHelper.py
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from LiveData import LiveData
from VoiceCall import VoiceCall
import threading
import time
import logger
from audio_resource import say_hello_pcm_file
class CallHelper:
def __init__(self, at_serial_helper, audio_helper):
self.at_serial_helper = at_serial_helper
self.pickup_lock = threading.Lock()
self.call_status = LiveData()
self.is_pickup = False
self.ring_count = 0
self.say_hello_pcm_file = say_hello_pcm_file()
self.audio_helper = audio_helper
def __call_no_carrier(self):
with self.pickup_lock:
if self.is_pickup:
self.is_pickup = False
self.call_status.value = VoiceCall(VoiceCall.VOICE_CALL_NO_CARRIER)
self.at_serial_helper.send_command_helper.write_at_command("AT+CPCMREG=0", delay=1.5)
def __call_start(self):
time.sleep(0.1) # 等ATA命令返回OK，以保证Log打印的时间顺序看起来是对的
self.call_status.value = VoiceCall(VoiceCall.VOICE_CALL_BEGIN)
self.is_pickup = True
def __call_end(self):
with self.pickup_lock:
if self.is_pickup:
self.is_pickup = False
self.call_status.value = VoiceCall(VoiceCall.VOICE_CALL_END)
self.at_serial_helper.send_command_helper.write_at_command("AT+CPCMREG=0", delay=1.5)
def __call_missed(self):
self.is_pickup = False
self.call_status.value = VoiceCall(VoiceCall.VOICE_CALL_MISSED)
def __pick_up_inner(self):
self.is_pickup = True
self.ring_count = 0
# 等待0.5秒，等待音频串口准备好, 否则串口可能返回ERROR
self.at_serial_helper.send_command_helper.write_at_command("AT+CPCMREG=1", delay=0.5)
time.sleep(0.6)
# 去读取音频数据， 每次读取640字节
with open(self.say_hello_pcm_file, "rb") as f:
while self.is_pickup:
data = f.read(640)
if not data:
break
self.audio_helper.write_audio_data(data)
time.sleep(0.01)
time.sleep(0.5)
self.call_status.value = VoiceCall(VoiceCall.VOICE_CALL_SAY_HELLO_DONE)
def pick_up(self, say_hello_pcm_file):
logger.d("发送 ATA 命令，接听电话")
self.at_serial_helper.send_command_helper.write_at_command("ATA", delay=0)
threading.Thread(target=self.__pick_up_inner).start()
def hang_up(self):
logger.d("发送 ATH 命令，挂断电话")
self.is_pickup = False
self.at_serial_helper.send_command_helper.write_at_command("ATH", delay=0)
# self.call_status.value = VoiceCall(VoiceCall.VOICE_CALL_END)
def is_in_voice_calling(self):
return self.is_pickup
def handle_call(self, decode_string):
# logger.e("AT串口返回：" + decode_string)
if (decode_string.find("RING") != -1) and (not self.is_pickup):
self.call_status.value = VoiceCall(VoiceCall.VOICE_CALL_RING)
# logger.i("收到1 ： " + decode_string)
return True
# 判断字符串是不是以 +CLIP: 开头
elif decode_string.startswith("+CLIP: \"") and (not self.is_pickup): # +CLIP: "13200000000",161,,,,0
# logger.i("收到2 ： " + decode_string)
"""
Calling Line Identification Presentation
允许在接收电话呼叫时，接收方可以看到呼叫方的电话号码。
"""
self.ring_count += 1
if decode_string.find('"') != -1:
split_strings = decode_string.split('"')
if len(split_strings) >= 2:
phone_number = split_strings[1]
self.call_status.value = VoiceCall(status=VoiceCall.VOICE_CALL_CLIP,
phone_number=phone_number, ring_count=self.ring_count)
return True
self.call_status.value = VoiceCall(status=VoiceCall.VOICE_CALL_CLIP, phone_number="UNKNOWN",
ring_count=self.ring_count)
return True
elif decode_string.find("VOICE CALL: BEGIN") != -1:
# logger.i("收到3 ： " + decode_string)
threading.Thread(target=self.__call_start).start()
return True
elif decode_string.find("VOICE CALL: END:") != -1:
# logger.i("收到4 ： " + decode_string)
threading.Thread(target=self.__call_end).start()
return True
elif decode_string.find("MISSED_CALL:") != -1:
# logger.i("收到5 ： " + decode_string)
threading.Thread(target=self.__call_missed).start()
return True
elif decode_string.find("NO CARRIER") != -1:
# logger.i("收到6 ： " + decode_string)
threading.Thread(target=self.__call_no_carrier).start()
return True
else:
return False
def prepare(self):
# 启动线程
self.at_serial_helper.send_command_helper.write_at_command("AT+CLIP=?")
self.at_serial_helper.send_command_helper.write_at_command("AT+CLIP=1")
# write_at_command("AT+CPCMFRM=1") 设置采样率为16k，默认为8k https://techship.com/support/faq/voice-calls-and-usb-audio/
self.at_serial_helper.send_command_helper.write_at_command("AT+CNMP=?")
self.at_serial_helper.send_command_helper.write_at_command("AT+CNMP=2")
self.at_serial_helper.send_command_helper.write_at_command("AT+CPCMREG=?")
# 主要改善TDD noise效果
self.at_serial_helper.send_command_helper.write_at_command("AT^PWRCTL=0,1,3")
# 重置状态
self.at_serial_helper.send_command_helper.write_at_command("AT+CPCMREG=0")