Python wave 模块，Wave_read() 实例源码
我们从Python开源项目中，提取了以下7个代码示例，用于说明如何使用wave.Wave_read()。
def _open_wav(wav):
'''Internal helper function to open an unknown parameter as a
wave file.
wav:
An open `wave.Wave_read` object,a `bytes` object containing
a wave file,or a valid argument to `wave.open`.
'''
if isinstance(wav, wave.Wave_read):
yield wav
return
if isinstance(wav, bytes) and wav[:4] == b'RIFF':
w = wave.open(BytesIO(wav), 'rb')
else:
w = wave.open(wav, 'rb')
yield w
w.close()
def _wave(self):
"""Return a wave.Wave_read instance from the ``wave`` module."""
try:
return wave.open(StringIO(self.contents))
except wave.Error, err:
err.message += "\nInvalid wave file: %s" % self
err.args = (err.message,)
raise
def play(wav, device_id=None):
'''Plays a wave file using a playback device.
The function will block until playback is complete.
wav:
An open `wave.Wave_read` object,or a valid argument to `wave.open`.
device_id:
The device to play over. Defaults to the first available.
'''
if device_id is None:
device_id = get_playback_devices()[0][1]
with _open_wav(wav) as w:
return _play(device_id, w)
def build_data(wav,begin=None,end=None):
wav_in_file = wave.Wave_read(wav)
wav_in_num_samples = wav_in_file.getnframes()
N = wav_in_file.getnframes()
dstr = wav_in_file.readframes(N)
data = np.fromstring(dstr, np.int16)
if begin is not None and end is not None:
return data[begin*16000:end*16000]
X = []
l = len(data)
for i in range(0, l-100, 160):
X.append(data[i:i + 480])
return X
def is_valid_wav(filename):
# check the sampling rate and number bits of the WAV
try:
wav_file = wave.Wave_read(filename)
except:
return False
if wav_file.getframerate() != 16000 or wav_file.getsampwidth() != 2 or wav_file.getnchannels() != 1 \
or wav_file.getcomptype() != 'NONE':
return False
return True
def is_valid_wav(filename):
# check the sampling rate and number bits of the WAV
try:
wav_file = wave.Wave_read(filename)
except:
return False
if wav_file.getframerate() != 16000 or wav_file.getsampwidth() != 2 or wav_file.getnchannels() != 1 \
or wav_file.getcomptype() != 'NONE':
return False
return True
def __init__(self, audio_reader, little_endian, samples_24_bit_pretending_to_be_32_bit):
self.audio_reader = audio_reader # an audio file object (e.g.,a `wave.Wave_read` instance)
self.little_endian = little_endian # whether the audio data is little-endian (when working with big-endian things,we'll have to convert it to little-endian before we process it)
self.samples_24_bit_pretending_to_be_32_bit = samples_24_bit_pretending_to_be_32_bit # this is true if the audio is 24-bit audio,but 24-bit audio isn't supported,so we have to pretend that this is 32-bit audio and convert it on the fly
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