def sei_ff_coding(bs: BitStream):
value = 0
next_byte = 0xFF
while next_byte == 0xFF:
next_byte = bs.read_bits(8)
value += next_byte
return value
def more_rbsp_data(bs: BitStream):
n = bs.available()
if n > 8:
return True
elif n <= 0:
return False
b = bs.read_bits(n, forward=False)
return not b == (1 << (n - 1))
def __fields_in_scaling_list(d: Table, bs: BitStream):
num = 8 if d.chroma_format_idc != 3 else 12
d.seq_scaling_list_present_flag = [0] * num
d.ScalingList4x4 = [[0] * 16 for i in range(6)]
d.UseDefaultScalingMatrix4x4Flag = [False] * 6
d.ScalingList8x8 = [[0] * 64 for i in range(6)]
d.UseDefaultScalingMatrix8x8Flag = [False] * 6
for i in range(num):
d.seq_scaling_list_present_flag[i] = bs.read_bits(1)
if d.seq_scaling_list_present_flag[i]:
if i < 6:
scaling_list(d.ScalingList4x4[i], bs,
d.UseDefaultScalingMatrix4x4Flag, i)
else:
scaling_list(d.ScalingList8x8[i - 6], bs,
d.UseDefaultScalingMatrix8x8Flag, i - 6)
