def __parse_tag(self, tag, count):
fileobj = cBytesIO(tag)
for i in xrange(count):
size_data = fileobj.read(4)
# someone writes wrong item counts
if not size_data:
break
size = cdata.uint_le(size_data)
flags = cdata.uint_le(fileobj.read(4))
# Bits 1 and 2 bits are flags, 0-3
# Bit 0 is read/write flag, ignored
kind = (flags & 6) >> 1
if kind == 3:
raise APEBadItemError("value type must be 0, 1, or 2")
key = value = fileobj.read(1)
while key[-1:] != b'\x00' and value:
value = fileobj.read(1)
key += value
if key[-1:] == b"\x00":
key = key[:-1]
if PY3:
try:
key = key.decode("ascii")
except UnicodeError as err:
reraise(APEBadItemError, err, sys.exc_info()[2])
value = fileobj.read(size)
value = _get_value_type(kind)._new(value)
self[key] = value
def __fill_missing(self, fileobj):
fileobj.seek(self.metadata + 8)
self.version = fileobj.read(4)
self.size = cdata.uint_le(fileobj.read(4))
self.items = cdata.uint_le(fileobj.read(4))
self.flags = cdata.uint_le(fileobj.read(4))
if self.header is not None:
self.data = self.header + 32
# If we're reading the header, the size is the header
# offset + the size, which includes the footer.
self.end = self.data + self.size
fileobj.seek(self.end - 32, 0)
if fileobj.read(8) == b"APETAGEX":
self.footer = self.end - 32
elif self.footer is not None:
self.end = self.footer + 32
self.data = self.end - self.size
if self.flags & HAS_HEADER:
self.header = self.data - 32
else:
self.header = self.data
else:
raise APENoHeaderError("No APE tag found")
# exclude the footer from size
if self.footer is not None:
self.size -= 32
def __parse_tag(self, tag, count):
fileobj = cBytesIO(tag)
for i in xrange(count):
size_data = fileobj.read(4)
# someone writes wrong item counts
if not size_data:
break
size = cdata.uint_le(size_data)
flags = cdata.uint_le(fileobj.read(4))
# Bits 1 and 2 bits are flags, 0-3
# Bit 0 is read/write flag, ignored
kind = (flags & 6) >> 1
if kind == 3:
raise APEBadItemError("value type must be 0, 1, or 2")
key = value = fileobj.read(1)
while key[-1:] != b'\x00' and value:
value = fileobj.read(1)
key += value
if key[-1:] == b"\x00":
key = key[:-1]
if PY3:
try:
key = key.decode("ascii")
except UnicodeError as err:
reraise(APEBadItemError, err, sys.exc_info()[2])
value = fileobj.read(size)
value = _get_value_type(kind)._new(value)
self[key] = value
def __fill_missing(self, fileobj):
fileobj.seek(self.metadata + 8)
self.version = fileobj.read(4)
self.size = cdata.uint_le(fileobj.read(4))
self.items = cdata.uint_le(fileobj.read(4))
self.flags = cdata.uint_le(fileobj.read(4))
if self.header is not None:
self.data = self.header + 32
# If we're reading the header, the size is the header
# offset + the size, which includes the footer.
self.end = self.data + self.size
fileobj.seek(self.end - 32, 0)
if fileobj.read(8) == b"APETAGEX":
self.footer = self.end - 32
elif self.footer is not None:
self.end = self.footer + 32
self.data = self.end - self.size
if self.flags & HAS_HEADER:
self.header = self.data - 32
else:
self.header = self.data
else:
raise APENoHeaderError("No APE tag found")
# exclude the footer from size
if self.footer is not None:
self.size -= 32
def __init__(self, fileobj):
page = OggPage(fileobj)
while not page.packets[0].startswith(b"Speex "):
page = OggPage(fileobj)
if not page.first:
raise OggSpeexHeaderError(
"page has ID header, but doesn't start a stream")
self.sample_rate = cdata.uint_le(page.packets[0][36:40])
self.channels = cdata.uint_le(page.packets[0][48:52])
self.bitrate = max(0, cdata.int_le(page.packets[0][52:56]))
self.serial = page.serial
def load(self, fileobj, errors='replace', framing=True):
"""Parse a Vorbis comment from a file-like object.
Keyword arguments:
* errors:
'strict', 'replace', or 'ignore'. This affects Unicode decoding
and how other malformed content is interpreted.
* framing -- if true, fail if a framing bit is not present
Framing bits are required by the Vorbis comment specification,
but are not used in FLAC Vorbis comment blocks.
"""
try:
vendor_length = cdata.uint_le(fileobj.read(4))
self.vendor = fileobj.read(vendor_length).decode('utf-8', errors)
count = cdata.uint_le(fileobj.read(4))
for i in xrange(count):
length = cdata.uint_le(fileobj.read(4))
try:
string = fileobj.read(length).decode('utf-8', errors)
except (OverflowError, MemoryError):
raise error("cannot read %d bytes, too large" % length)
try:
tag, value = string.split('=', 1)
except ValueError as err:
if errors == "ignore":
continue
elif errors == "replace":
tag, value = u"unknown%d" % i, string
else:
reraise(VorbisEncodingError, err, sys.exc_info()[2])
try:
tag = tag.encode('ascii', errors)
except UnicodeEncodeError:
raise VorbisEncodingError("invalid tag name %r" % tag)
else:
# string keys in py3k
if PY3:
tag = tag.decode("ascii")
if is_valid_key(tag):
self.append((tag, value))
if framing and not bytearray(fileobj.read(1))[0] & 0x01:
raise VorbisUnsetFrameError("framing bit was unset")
except (cdata.error, TypeError):
raise error("file is not a valid Vorbis comment")
def load(self, fileobj, errors='replace', framing=True):
"""Parse a Vorbis comment from a file-like object.
Keyword arguments:
* errors:
'strict', 'replace', or 'ignore'. This affects Unicode decoding
and how other malformed content is interpreted.
* framing -- if true, fail if a framing bit is not present
Framing bits are required by the Vorbis comment specification,
but are not used in FLAC Vorbis comment blocks.
"""
try:
vendor_length = cdata.uint_le(fileobj.read(4))
self.vendor = fileobj.read(vendor_length).decode('utf-8', errors)
count = cdata.uint_le(fileobj.read(4))
for i in xrange(count):
length = cdata.uint_le(fileobj.read(4))
try:
string = fileobj.read(length).decode('utf-8', errors)
except (OverflowError, MemoryError):
raise error("cannot read %d bytes, too large" % length)
try:
tag, value = string.split('=', 1)
except ValueError as err:
if errors == "ignore":
continue
elif errors == "replace":
tag, value = u"unknown%d" % i, string
else:
reraise(VorbisEncodingError, err, sys.exc_info()[2])
try:
tag = tag.encode('ascii', errors)
except UnicodeEncodeError:
raise VorbisEncodingError("invalid tag name %r" % tag)
else:
# string keys in py3k
if PY3:
tag = tag.decode("ascii")
if is_valid_key(tag):
self.append((tag, value))
if framing and not bytearray(fileobj.read(1))[0] & 0x01:
raise VorbisUnsetFrameError("framing bit was unset")
except (cdata.error, TypeError):
raise error("file is not a valid Vorbis comment")
def __init__(self, fileobj, offset):
fileobj.seek(offset or 0)
header = fileobj.read(18)
if len(header) != 18 or not header.startswith(b"TTA"):
raise TrueAudioHeaderError("TTA header not found")
self.sample_rate = cdata.int_le(header[10:14])
samples = cdata.uint_le(header[14:18])
self.length = float(samples) / self.sample_rate
def __init__(self, fileobj, offset):
fileobj.seek(offset or 0)
header = fileobj.read(18)
if len(header) != 18 or not header.startswith(b"TTA"):
raise TrueAudioHeaderError("TTA header not found")
self.sample_rate = cdata.int_le(header[10:14])
samples = cdata.uint_le(header[14:18])
self.length = float(samples) / self.sample_rate
def __parse_sv467(self, fileobj):
fileobj.seek(-4, 1)
header = fileobj.read(32)
if len(header) != 32:
raise MusepackHeaderError("not a Musepack file")
# SV7
if header.startswith(b"MP+"):
self.version = bytearray(header)[3] & 0xF
if self.version < 7:
raise MusepackHeaderError("not a Musepack file")
frames = cdata.uint_le(header[4:8])
flags = cdata.uint_le(header[8:12])
self.title_peak, self.title_gain = struct.unpack(
"<Hh", header[12:16])
self.album_peak, self.album_gain = struct.unpack(
"<Hh", header[16:20])
self.title_gain /= 100.0
self.album_gain /= 100.0
self.title_peak /= 65535.0
self.album_peak /= 65535.0
self.sample_rate = RATES[(flags >> 16) & 0x0003]
self.bitrate = 0
# SV4-SV6
else:
header_dword = cdata.uint_le(header[0:4])
self.version = (header_dword >> 11) & 0x03FF
if self.version < 4 or self.version > 6:
raise MusepackHeaderError("not a Musepack file")
self.bitrate = (header_dword >> 23) & 0x01FF
self.sample_rate = 44100
if self.version >= 5:
frames = cdata.uint_le(header[4:8])
else:
frames = cdata.ushort_le(header[6:8])
if self.version < 6:
frames -= 1
self.channels = 2
self.length = float(frames * 1152 - 576) / self.sample_rate
def __parse_sv467(self, fileobj):
fileobj.seek(-4, 1)
header = fileobj.read(32)
if len(header) != 32:
raise MusepackHeaderError("not a Musepack file")
# SV7
if header.startswith(b"MP+"):
self.version = bytearray(header)[3] & 0xF
if self.version < 7:
raise MusepackHeaderError("not a Musepack file")
frames = cdata.uint_le(header[4:8])
flags = cdata.uint_le(header[8:12])
self.title_peak, self.title_gain = struct.unpack(
"<Hh", header[12:16])
self.album_peak, self.album_gain = struct.unpack(
"<Hh", header[16:20])
self.title_gain /= 100.0
self.album_gain /= 100.0
self.title_peak /= 65535.0
self.album_peak /= 65535.0
self.sample_rate = RATES[(flags >> 16) & 0x0003]
self.bitrate = 0
# SV4-SV6
else:
header_dword = cdata.uint_le(header[0:4])
self.version = (header_dword >> 11) & 0x03FF
if self.version < 4 or self.version > 6:
raise MusepackHeaderError("not a Musepack file")
self.bitrate = (header_dword >> 23) & 0x01FF
self.sample_rate = 44100
if self.version >= 5:
frames = cdata.uint_le(header[4:8])
else:
frames = cdata.ushort_le(header[6:8])
if self.version < 6:
frames -= 1
self.channels = 2
self.length = float(frames * 1152 - 576) / self.sample_rate
def from_fileobj(cls, fileobj):
"""A new _WavPackHeader or raises WavPackHeaderError"""
header = fileobj.read(32)
if len(header) != 32 or not header.startswith(b"wvpk"):
raise WavPackHeaderError("not a WavPack header: %r" % header)
block_size = cdata.uint_le(header[4:8])
version = cdata.ushort_le(header[8:10])
track_no = ord(header[10:11])
index_no = ord(header[11:12])
samples = cdata.uint_le(header[12:16])
if samples == 2 ** 32 - 1:
samples = -1
block_index = cdata.uint_le(header[16:20])
block_samples = cdata.uint_le(header[20:24])
flags = cdata.uint_le(header[24:28])
crc = cdata.uint_le(header[28:32])
return _WavPackHeader(block_size, version, track_no, index_no,
samples, block_index, block_samples, flags, crc)
