def __init__(self, filename):
"""filename is a plain string"""
from audiotools import ChannelMask
AiffContainer.__init__(self, filename)
self.__channels__ = 0
self.__bits_per_sample__ = 0
self.__sample_rate__ = 0
self.__channel_mask__ = ChannelMask(0)
self.__total_sample_frames__ = 0
from audiotools.bitstream import BitstreamReader
try:
for chunk in self.chunks():
if chunk.id == b"COMM":
try:
(self.__channels__, self.__total_sample_frames__,
self.__bits_per_sample__, self.__sample_rate__,
self.__channel_mask__) = parse_comm(
BitstreamReader(chunk.data(), False))
break
except IOError:
continue
except IOError:
raise InvalidAIFF("I/O error reading wave")
def __init__(self, filename):
"""filename is a plain string"""
from audiotools import ChannelMask
AiffContainer.__init__(self, filename)
self.__channels__ = 0
self.__bits_per_sample__ = 0
self.__sample_rate__ = 0
self.__channel_mask__ = ChannelMask(0)
self.__total_sample_frames__ = 0
from audiotools.bitstream import BitstreamReader
try:
for chunk in self.chunks():
if chunk.id == b"COMM":
try:
(self.__channels__,
self.__total_sample_frames__,
self.__bits_per_sample__,
self.__sample_rate__,
self.__channel_mask__) = parse_comm(
BitstreamReader(chunk.data(), False))
break
except IOError:
continue
except IOError:
raise InvalidAIFF("I/O error reading wave")
def convert(self,
target_path,
target_class,
compression=None,
progress=None):
"""encodes a new AudioFile from existing AudioFile
take a filename string, target class and optional compression string
encodes a new AudioFile in the target class and returns
the resulting object
may raise EncodingError if some problem occurs during encoding"""
# A Shorten file cannot contain both RIFF and AIFF chunks
# at the same time.
from audiotools import WaveAudio
from audiotools import AiffAudio
from audiotools import to_pcm_progress
if ((self.has_foreign_wave_chunks()
and hasattr(target_class, "from_wave")
and callable(target_class.from_wave))):
return WaveContainer.convert(self, target_path, target_class,
compression, progress)
elif (self.has_foreign_aiff_chunks()
and hasattr(target_class, "from_aiff")
and callable(target_class.from_aiff)):
return AiffContainer.convert(self, target_path, target_class,
compression, progress)
else:
return target_class.from_pcm(target_path,
to_pcm_progress(self, progress),
compression,
total_pcm_frames=self.total_frames())
def convert(self, target_path, target_class, compression=None,
progress=None):
"""encodes a new AudioFile from existing AudioFile
take a filename string, target class and optional compression string
encodes a new AudioFile in the target class and returns
the resulting object
may raise EncodingError if some problem occurs during encoding"""
#A Shorten file cannot contain both RIFF and AIFF chunks
#at the same time.
import tempfile
from . import WaveAudio
from . import AiffAudio
from . import to_pcm_progress
if ((self.has_foreign_wave_chunks() and
hasattr(target_class, "from_wave") and
callable(target_class.from_wave))):
return WaveContainer.convert(self,
target_path,
target_class,
compression,
progress)
elif (self.has_foreign_aiff_chunks() and
hasattr(target_class, "from_aiff") and
callable(target_class.from_aiff)):
return AiffContainer.convert(self,
target_path,
target_class,
compression,
progress)
else:
return target_class.from_pcm(
target_path,
to_pcm_progress(self, progress),
compression,
total_pcm_frames=self.total_frames())
