How to use the mutagen._util.cdata.uint_le function in mutagen

def test_uint_le(self):
        self.failUnlessEqual(cdata.uint_le(self.ZERO), 0)
        self.failUnlessEqual(cdata.uint_le(self.LEONE), 1)
        self.failUnlessEqual(cdata.uint_le(self.BEONE), 16777216)
        self.failUnlessEqual(cdata.uint_le(self.NEGONE), 2**32-1)

def test_uint_le(self):
        self.failUnlessEqual(cdata.uint_le(self.ZERO), 0)
        self.failUnlessEqual(cdata.uint_le(self.LEONE), 1)
        self.failUnlessEqual(cdata.uint_le(self.BEONE), 16777216)
        self.failUnlessEqual(cdata.uint_le(self.NEGONE), 2**32-1)

def load(self, fileobj, errors='replace', framing=True):
        """Parse a Vorbis comment from a file-like object.

        Arguments:
            errors (str): 'strict', 'replace', or 'ignore'.
                This affects Unicode decoding and how other malformed content
                is interpreted.
            framing (bool): 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 range(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:

flags = cdata.uint_le(header[8:12])

            self.title_peak, self.title_gain = struct.unpack(
                "> 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)

def __init__(self, fileobj):
        page = OggPage(fileobj)
        while not page.packets[0].startswith("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 = cdata.int_le(page.packets[0][52:56])
        if self.bitrate == -1:
            self.bitrate = 0
        self.serial = page.serial

def __init__(self, fileobj):
        page = OggPage(fileobj)
        while not page.packets[0].startswith("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

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 __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 __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(
                "> 16) & 0x0003]
            self.bitrate = 0
        # SV4-SV6
        else:
            header_dword = cdata.uint_le(header[0:4])
            self.version = (header_dword >> 11) & 0x03FF