我试图定义一个类，除其他外，它将波形文件读入一个numpy数组，然后播放它。看起来回调函数只被调用一次，所以我猜测用什么机制来保持流＆＃34;活跃的没有工作？
有没有人成功完成过这项工作？
class asoa_io:
def write_callback(self, in_data, frame_count, time_info, status):
print "Frame count is " + str(frame_count)
list_data = self.template_wave[self.template_idx:(self.template_idx+frame_count) - 1]
data = list_data.tobytes()
print repr(data)
self.template_idx += frame_count
return (data, pyaudio.paContinue)
def read_callback(self, in_data, frame_count, time_info, status):
self.signal += in_data # This has the incoming signal as a list of frames.
return (in_data, pyaudio.paContinue)
""" Synthesize the speech and do any preprocessing.
Note that we want to use the kal_diphone voice for synthesis.
"""
def __init__(self, text_string):
temp_fd, template_file = tempfile.mkstemp()
string_file = tempfile.NamedTemporaryFile()
string_file.write(text_string)
string_file.flush()
if (subprocess.call([PATH_TO_TEXT2WAVE, string_file.name, "-o", template_file]) > 0):
print "Error running text2wave"
string_file.close()
self.template_rate, self.template_wave = scipy.io.wavfile.read(template_file)
self.template_length = len(self.template_wave)
self.template_framesize = 100
self.pa = pyaudio.PyAudio()
# self.input_stream = self.pa.open(format=pyaudio.get_format_from_width(2),
# channels=1, rate = self.template_rate, input=True,
# stream_callback = self.read_callback)
self.output_stream = self.pa.open(format=pyaudio.get_format_from_width(2),
channels=1, rate = self.template_rate, output=True,
stream_callback = self.write_callback)
self.template_idx = 0
self.signal = []
def start_speech(self):
self.output_stream.start_stream()
# self.input_stream.start_stream()
while self.output_stream.is_active():
time.sleep(0.1)
time.sleep(10)
def stop(self):
self.output_stream.stop_stream()
self.input_stream.stop_stream()
self.output_stream.close()
self.input_stream.close()
self.pa.terminate()
为了它的价值，我从pyaudio文档站点复制了示例回调代码，并用它来播放正在读取的wave文件;工作得很好。第一个1024字节也看起来正确。
感谢任何人的帮助！