def get_header(self, filename=None):
f = self.fileobj
f.seek(0)
self.__check_header(f)
self.__offset = self.__find_audio_offset(f)
data = bytearray(b'fLaC')
for block in self.metadata_blocks:
if isinstance(block, Padding):
continue
data += MetadataBlock._writeblock(block)
padding = Padding()
padding.length = 1020
data += MetadataBlock._writeblock(padding, is_last=True)
return bytes(data)
def test_write_read_max_size(self):
class SomeBlock(MetadataBlock):
code = 255
max_data_size = 2**24 - 1
block = SomeBlock(b"\x00" * max_data_size)
data = MetadataBlock._writeblock(block)
self.assertEqual(data[:4], b"\xff\xff\xff\xff")
header_size = 4
self.assertEqual(len(data), max_data_size + header_size)
block = SomeBlock(b"\x00" * (max_data_size + 1))
self.assertRaises(error, MetadataBlock._writeblock, block)
def test_write_read_max_size(self):
class SomeBlock(MetadataBlock):
code = 255
max_data_size = 2 ** 24 - 1
block = SomeBlock(b"\x00" * max_data_size)
data = MetadataBlock._writeblock(block)
self.assertEqual(data[:4], b"\xff\xff\xff\xff")
header_size = 4
self.assertEqual(len(data), max_data_size + header_size)
block = SomeBlock(b"\x00" * (max_data_size + 1))
self.assertRaises(error, MetadataBlock._writeblock, block)