def __populate_metadata__(self):
#set up some default values
self.__bits_per_sample__ = 16
self.__channels__ = 2
self.__channel_mask__ = 0x3
self.__sample_rate__ = 44100
self.__total_frames__ = 0
self.__blocks__ = []
self.__format__ = None
#grab a few pieces of technical metadata from the Shorten file itself
#which requires a dry-run through the decoder
try:
decoder = audiotools.decoders.SHNDecoder(self.filename)
try:
self.__bits_per_sample__ = decoder.bits_per_sample
self.__channels__ = decoder.channels
(self.__total_frames__,
self.__blocks__) = decoder.metadata()
finally:
decoder.close()
try:
self.__channel_mask__ = ChannelMask.from_channels(
self.__channels__)
except ValueError:
self.__channel_mask__ = 0
except (ValueError, IOError):
#if we hit an error in SHNDecoder while reading
#technical metadata, the default values will have to do
return
#the remainder requires parsing the file's VERBATIM blocks
#which may contain Wave, AIFF or Sun AU info
if (self.__blocks__[0] is not None):
header = cStringIO.StringIO(self.__blocks__[0])
for format in WaveAudio, AiffAudio:
header.seek(0, 0)
if (format.is_type(header)):
self.__format__ = format
break
if (self.__format__ is WaveAudio):
for (chunk_id, chunk_data) in self.__wave_chunks__():
if (chunk_id == 'fmt '):
fmt_chunk = WaveAudio.FMT_CHUNK.parse(chunk_data)
self.__sample_rate__ = fmt_chunk.sample_rate
if (fmt_chunk.compression == 0xFFFE):
self.__channel_mask__ = \
WaveAudio.fmt_chunk_to_channel_mask(
fmt_chunk.channel_mask)
elif (self.__format__ is AiffAudio):
for (chunk_id, chunk_data) in self.__aiff_chunks__():
if (chunk_id == 'COMM'):
comm_chunk = AiffAudio.COMM_CHUNK.parse(chunk_data)
self.__sample_rate__ = comm_chunk.sample_rate
def __populate_metadata__(self):
#set up some default values
self.__bits_per_sample__ = 16
self.__channels__ = 2
self.__channel_mask__ = 0x3
self.__sample_rate__ = 44100
self.__total_frames__ = 0
self.__blocks__ = []
self.__format__ = None
#grab a few pieces of technical metadata from the Shorten file itself
#which requires a dry-run through the decoder
try:
decoder = audiotools.decoders.SHNDecoder(self.filename)
try:
self.__bits_per_sample__ = decoder.bits_per_sample
self.__channels__ = decoder.channels
(self.__total_frames__,
self.__blocks__) = decoder.metadata()
finally:
decoder.close()
try:
self.__channel_mask__ = ChannelMask.from_channels(
self.__channels__)
except ValueError:
self.__channel_mask__ = 0
except (ValueError, IOError):
#if we hit an error in SHNDecoder while reading
#technical metadata, the default values will have to do
return
#the remainder requires parsing the file's VERBATIM blocks
#which may contain Wave, AIFF or Sun AU info
if (self.__blocks__[0] is not None):
header = cStringIO.StringIO(self.__blocks__[0])
for format in WaveAudio, AiffAudio:
header.seek(0, 0)
if (format.is_type(header)):
self.__format__ = format
break
if (self.__format__ is WaveAudio):
for (chunk_id, chunk_data) in self.__wave_chunks__():
if (chunk_id == 'fmt '):
fmt_chunk = WaveAudio.FMT_CHUNK.parse(chunk_data)
self.__sample_rate__ = fmt_chunk.sample_rate
if (fmt_chunk.compression == 0xFFFE):
self.__channel_mask__ = \
WaveAudio.fmt_chunk_to_channel_mask(
fmt_chunk.channel_mask)
elif (self.__format__ is AiffAudio):
for (chunk_id, chunk_data) in self.__aiff_chunks__():
if (chunk_id == 'COMM'):
comm_chunk = AiffAudio.COMM_CHUNK.parse(chunk_data)
self.__sample_rate__ = comm_chunk.sample_rate
def __populate_metadata__(self):
# Alteration for BootTunes:
# Since the vast majority of files will match the defaults, and because this method crashes
# Windows 7 and locks up Mac, just go with the defaults.
self.__bits_per_sample__ = 16
self.__channels__ = 2
self.__channel_mask__ = 0x3
self.__sample_rate__ = 44100
self.__total_frames__ = 0
self.__blocks__ = []
self.__format__ = None
return
#grab a few pieces of technical metadata from the Shorten file itself
#which requires a dry-run through the decoder
decoder = audiotools.decoders.SHNDecoder(self.filename)
self.__bits_per_sample__ = decoder.bits_per_sample
self.__channels__ = decoder.channels
(self.__total_frames__,
self.__blocks__) = decoder.metadata()
decoder.close()
#set up some default values
self.__sample_rate__ = 44100
try:
self.__channel_mask__ = ChannelMask.from_channels(self.__channels__)
except ValueError:
self.__channel_mask__ = 0
self.__format__ = None
#the remainder requires parsing the file's VERBATIM blocks
#which may contain Wave, AIFF or Sun AU info
if (self.__blocks__[0] is not None):
header = cStringIO.StringIO(self.__blocks__[0])
for format in WaveAudio,AiffAudio:
header.seek(0,0)
if (format.is_type(header)):
self.__format__ = format
break
if (self.__format__ is WaveAudio):
for (chunk_id,chunk_data) in self.__wave_chunks__():
if (chunk_id == 'fmt '):
fmt_chunk = WaveAudio.FMT_CHUNK.parse(chunk_data)
self.__sample_rate__ = fmt_chunk.sample_rate
if (fmt_chunk.compression == 0xFFFE):
self.__channel_mask__ = WaveAudio.fmt_chunk_to_channel_mask(fmt_chunk.channel_mask)
elif (self.__format__ is AiffAudio):
for (chunk_id,chunk_data) in self.__aiff_chunks__():
if (chunk_id == 'COMM'):
comm_chunk = AiffAudio.COMM_CHUNK.parse(chunk_data)
self.__sample_rate__ = comm_chunk.sample_rate
