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#Simple packet type for the simple protocol
import struct
class Packet(object):
def __init__(self, cmd, *data):
self.cmd = cmd
self.data = data
if len(data) > 8:
raise ValueError('Too many data')
self.data = list(self.data) + [0] * (8-len(self.data))
@classmethod
def FromStr(cls, s):
parts = struct.unpack('>9L', s)
return cls(parts[0], *parts[1:])
def as_float(self, i):
return struct.unpack('>f', struct.pack('>L', self.data[i]))[0]
def __str__(self):
return struct.pack('>L'+(''.join('f' if isinstance(i, float) else 'L' for i in self.data)), self.cmd, *self.data)
class CMD:
KA = 0 # No important data
PING = 1 # Data are echoed exactly
QUIT = 2 # No important data
PLAY = 3 # seconds, microseconds, frequency (Hz), amplitude (0.0 - 1.0), port
CAPS = 4 # ports, client type (1), user ident (2-7)
PCM = 5 # 16 samples, encoded S16_LE
def itos(i):
return struct.pack('>L', i).rstrip('\0')
def stoi(s):
return struct.unpack('>L', s.ljust(4, '\0'))[0]
OBLIGATE_POLYPHONE = 0xffffffff
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