glymur/jp2box.py
def _parse_vendor_features(read_buffer, mask_length):
    """Construct vendor features, vendor mask data from the file.

    Specifically working on Reader Requirements box.

    Parameters
    ----------
    fptr : file object
        File object for JP2K file.
    mask_length : int
        Length of vendor mask flag
    """
    # The mask length tells us the format string to use when unpacking
    # from the buffer read from file.
    mask_format = {1: 'B', 2: 'H', 4: 'I'}[mask_length]

    num_vendor_features, = struct.unpack_from('>H', read_buffer)

    # Each vendor feature consists of a 16-byte UUID plus a mask whose
    # length is specified by, you guessed it, "mask_length".
    entry_length = 16 + mask_length
    vendor_feature = []
    vendor_mask = []
    for j in range(num_vendor_features):
        uslice = slice(2 + j * entry_length, 2 + (j + 1) * entry_length)
        ubuffer = read_buffer[uslice]
        vendor_feature.append(UUID(bytes=ubuffer[0:16]))

        vmask = struct.unpack('>' + mask_format, ubuffer[16:])
        vendor_mask.append(vmask)

    return vendor_feature, vendor_mask
Construct vendor features, vendor mask data from the file.

    Specifically working on Reader Requirements box.

    Parameters
    ----------
    fptr : file object
        File object for JP2K file.
    mask_length : int
        Length of vendor mask flag
    
Construct vendor features, vendor mask data from the file.
Specifically working on Reader Requirements box.

Parameters

fptr : file object
File object for JP2K file.
mask_length : int
Length of vendor mask flag
Construct vendor features vendor mask data from the file . Specifically working on Reader Requirements box . Parameters fptr : file object File object for JP2K file . mask_length : int Length of vendor mask flag
def _parse_vendor_features(read_buffer, mask_length):
    mask_format = {1: 'B', 2: 'H', 4: 'I'}[mask_length]
    num_vendor_features, = struct.unpack_from('>H', read_buffer)
    entry_length = 16 + mask_length
    vendor_feature = []
    vendor_mask = []
    for j in range(num_vendor_features):
        uslice = slice(2 + j * entry_length, 2 + (j + 1) * entry_length)
        ubuffer = read_buffer[uslice]
        vendor_feature.append(UUID(bytes=ubuffer[0:16]))
        vmask = struct.unpack('>' + mask_format, ubuffer[16:])
        vendor_mask.append(vmask)
    return vendor_feature, vendor_mask
def _parse_vendor_features ( read_buffer , mask_length ) : mask_format = { 1 : 'B' , 2 : 'H' , 4 : 'I' } [ mask_length ] num_vendor_features , = struct . unpack_from ( '>H' , read_buffer ) entry_length = 16 + mask_length vendor_feature = [ ] vendor_mask = [ ] for j in range ( num_vendor_features ) : uslice = slice ( 2 + j * entry_length , 2 + ( j + 1 ) * entry_length ) ubuffer = read_buffer [ uslice ] vendor_feature . append ( UUID ( bytes = ubuffer [ 0 : 16 ] ) ) vmask = struct . unpack ( '>' + mask_format , ubuffer [ 16 : ] ) vendor_mask . append ( vmask ) return vendor_feature , vendor_mask
Construct vendor features, vendor mask data from the file.
Construct vendor features vendor mask data from the file .
"""Construct vendor features, vendor mask data from the file.

    Specifically working on Reader Requirements box.

    Parameters
    ----------
    fptr : file object
        File object for JP2K file.
    mask_length : int
        Length of vendor mask flag
    """ # The mask length tells us the format string to use when unpacking # from the buffer read from file. # Each vendor feature consists of a 16-byte UUID plus a mask whose # length is specified by, you guessed it, "mask_length".
read_buffer
mask_length