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21.2. 音频处理

21.2.1. 网络播放音频

21.2.1.1. 服务端

			
#!/usr/bin/env python

import pyaudio
import socket
import select

FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 44100
CHUNK = 4096

audio = pyaudio.PyAudio()

serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
serversocket.bind(('', 4444))
serversocket.listen(5)


def callback(in_data, frame_count, time_info, status):
    for s in read_list[1:]:
        s.send(in_data)
    return (None, pyaudio.paContinue)


# start Recording
stream = audio.open(format=FORMAT, channels=CHANNELS, rate=RATE, input=True, frames_per_buffer=CHUNK, stream_callback=callback)
# stream.start_stream()

read_list = [serversocket]
print "recording..."

try:
    while True:
        readable, writable, errored = select.select(read_list, [], [])
        for s in readable:
            if s is serversocket:
                (clientsocket, address) = serversocket.accept()
                read_list.append(clientsocket)
                print "Connection from", address
            else:
                data = s.recv(1024)
                if not data:
                    read_list.remove(s)
except KeyboardInterrupt:
    pass


print "finished recording"

serversocket.close()
# stop Recording
stream.stop_stream()
stream.close()
audio.terminate()			
			
			

21.2.1.2. 客户端

			
#!/usr/bin/env python

import pyaudio
import socket
import sys

FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 44100
CHUNK = 4096

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((sys.argv[1], int(sys.argv[2])))
audio = pyaudio.PyAudio()
stream = audio.open(format=FORMAT, channels=CHANNELS, rate=RATE, output=True, frames_per_buffer=CHUNK)

try:
    while True:
        data = s.recv(CHUNK)
        stream.write(data)
except KeyboardInterrupt:
    pass

print('Shutting down')
s.close()
stream.close()
audio.terminate()