class StaticMemorySource(StaticSource):
'''Helper class for default implementation of `StaticSource`. Do not use
directly.'''
def __init__(self, data, audio_format):
'''Construct a memory source over the given data buffer.
'''
self._file = BytesIO(data)
self._max_offset = len(data)
self.audio_format = audio_format
self._duration = len(data) / float(audio_format.bytes_per_second)
def seek(self, timestamp):
offset = int(timestamp * self.audio_format.bytes_per_second)
# Align to sample
if self.audio_format.bytes_per_sample == 2:
offset &= 0xfffffffe
elif self.audio_format.bytes_per_sample == 4:
offset &= 0xfffffffc
self._file.seek(offset)
def get_audio_data(self, bytes):
offset = self._file.tell()
timestamp = float(offset) / self.audio_format.bytes_per_second
# Align to sample size
if self.audio_format.bytes_per_sample == 2:
bytes &= 0xfffffffe
elif self.audio_format.bytes_per_sample == 4:
bytes &= 0xfffffffc
data = self._file.read(bytes)
if not len(data):
return None
duration = float(len(data)) / self.audio_format.bytes_per_second
return AudioData(data, len(data), timestamp, duration, [])
class StaticMemorySource(StaticSource):
'''Helper class for default implementation of `StaticSource`. Do not use
directly.'''
def __init__(self, data, audio_format):
'''Construct a memory source over the given data buffer.
'''
self._file = BytesIO(data)
self._max_offset = len(data)
self.audio_format = audio_format
self._duration = len(data) / float(audio_format.bytes_per_second)
def seek(self, timestamp):
offset = int(timestamp * self.audio_format.bytes_per_second)
# Align to sample
if self.audio_format.bytes_per_sample == 2:
offset &= 0xfffffffe
elif self.audio_format.bytes_per_sample == 4:
offset &= 0xfffffffc
self._file.seek(offset)
def get_audio_data(self, bytes):
offset = self._file.tell()
timestamp = float(offset) / self.audio_format.bytes_per_second
# Align to sample size
if self.audio_format.bytes_per_sample == 2:
bytes &= 0xfffffffe
elif self.audio_format.bytes_per_sample == 4:
bytes &= 0xfffffffc
data = self._file.read(bytes)
if not len(data):
return None
duration = float(len(data)) / self.audio_format.bytes_per_second
return AudioData(data, len(data), timestamp, duration, [])
def __init__(self, file):
if not hasattr(file, 'seek'):
file = BytesIO(file.read())
super(RIFFFile, self).__init__(file, 0)
def __init__(self, file):
if not hasattr(file, 'seek'):
file = BytesIO(file.read())
super(RIFFFile, self).__init__(file, 0)
