调用3G调制解调器Python, PyAudio

Question

我有两个python脚本。第一个用At命令调用，第二个接收音频并将其发送到计算机麦克风。问题是当我发送音频时，调制解调器重置或收听速度很慢。

第一(docall.py)

import serial
se = serial.Serial()
se.port = 5
se.baudrate = 9600 # may be different
se.timeout = 0.5
a=1
se.open()
cont=0
while (a==1):
 if not se.isOpen():
  se.open()
 if cont == 1:
  se.write('AT+CHUP;rn')
  se.write('ATD*264;rn')
 if cont == 2:
  se.write('AT^DDSETEX?;rn')
 if cont == 3:
  se.write('AT^DDSETEX=2;rn')
 line = se.read(1024)
 print (line)
 cont=cont+1
se.close()

---

第二(audio.py)

import serial
import pyaudio
import wave
import time
CHUNK = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 8000
RECORD_SECONDS = 10
WIDTH = 2
pe = pyaudio.PyAudio()
stream= pe.open(format=pe.get_format_from_width(WIDTH),
                channels=CHANNELS,
                rate=RATE,
                output=True,
                frames_per_buffer=CHUNK)
mic= pe.open(format=pyaudio.paInt16,
                channels=1,
                rate=8000,
                input=True,
                frames_per_buffer=128)
se = serial.Serial()
se.port = 3
se.baudrate = 9600 # may be different
se.timeout = 0.5
se.open()
se.writeTimeout = 0
streaming = []
frames = []
while True:
 re= se.read(CHUNK)
 stream.write(re)
 se.write(mic.read(612))

Answer 1

为了匹配设备速率，您需要将帧缓冲区设置为160。我正在使用pa设备回调以便从设备写入和读取，关键号码是每个缓冲区320帧。

device = Serial('/dev/tty.HUAWEIMobile-Diag', timeout=None,  writeTimeout=0)
time.sleep(0.1) #this sleep needed for device buffer clean
device.flush()
device.flushInput()
device.flushOutput()
uni_stream = pe.open(format=pyaudio.paInt16,
                     channels=1,
                     rate=8000,
                     input=True,
                     output=True,
                     frames_per_buffer=160, stream_callback=uni_callback)
def uni_callback(in_data, frame_count, time_info, status):
    data = device.read(320)
    device.write(in_data)
    return (data, pyaudio.paContinue)