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#!/usr/bin/env python
from socketserver import *
from time import time, strftime, sleep
from collections import namedtuple, deque
from itertools import product, cycle
import threading
import random
from ctypes import *
import numpy as np
from matelight import sendframe, DISPLAY_WIDTH, DISPLAY_HEIGHT, FRAME_SIZE
UDP_TIMEOUT = 3.0
class COLOR(Structure):
_fields_ = [('r', c_uint8), ('g', c_uint8), ('b', c_uint8), ('a', c_uint8)]
class FRAMEBUFFER(Structure):
_fields_ = [('data', POINTER(COLOR)), ('w', c_size_t), ('h', c_size_t)]
bdf = CDLL('./libbdf.so')
bdf.read_bdf_file.restype = c_void_p
bdf.framebuffer_render_text.restype = POINTER(FRAMEBUFFER)
bdf.framebuffer_render_text.argtypes= [c_char_p, c_void_p, c_void_p, c_size_t, c_size_t, c_size_t]
unifont = bdf.read_bdf_file('unifont.bdf')
def compute_text_bounds(text):
assert unifont
textbytes = bytes(str(text), 'UTF-8')
textw, texth = c_size_t(0), c_size_t(0)
res = bdf.framebuffer_get_text_bounds(textbytes, unifont, byref(textw), byref(texth))
if res:
raise ValueError('Invalid text')
return textw.value, texth.value
def render_text(text, offset):
cbuf = create_string_buffer(FRAME_SIZE*sizeof(COLOR))
textbytes = bytes(str(text), 'UTF-8')
res = bdf.framebuffer_render_text(textbytes, unifont, cbuf, DISPLAY_WIDTH, DISPLAY_HEIGHT, offset)
if res:
raise ValueError('Invalid text')
return np.ctypeslib.as_array(cast(cbuf, POINTER(c_uint8)), shape=(DISPLAY_WIDTH, DISPLAY_HEIGHT, 4))
printlock = threading.Lock()
def printframe(fb):
w,h,_ = fb.shape
printlock.acquire()
print('\0337\033[H', end='')
print('Rendering frame @{}'.format(time()))
bdf.console_render_buffer(fb.ctypes.data_as(POINTER(c_uint8)), w, h)
print('\033[0m\033[KCurrently rendering', current_entry.entrytype, 'from', current_entry.remote, ':', current_entry.text, '\0338', end='')
printlock.release()
QueueEntry = namedtuple('QueueEntry', ['entrytype', 'remote', 'timestamp', 'text'])
defaultlines = [ QueueEntry('text', '127.0.0.1', 0, l[:-1].replace('\\x1B', '\x1B')) for l in open('default.lines').readlines() ]
random.shuffle(defaultlines)
defaulttexts = cycle(defaultlines)
current_entry = next(defaulttexts)
conns = {}
textqueue = []
def log(*args):
printlock.acquire()
print(strftime('\x1B[93m[%m-%d %H:%M:%S]\x1B[0m'), ' '.join(str(arg) for arg in args), '\x1B[0m')
printlock.release()
class MateLightUDPServer(UDPServer):
"""
The server class for the SocketServer interface.
"""
def __init__(self, *args, **kwargs):
"""
Setup the deque for the frame
"""
super(MateLightUDPServer, self).__init__(*args, **kwargs)
self.frame_deque = deque(maxlen=30)
def get_next_frame(self):
try:
return self.frame_deque.popleft()
except IndexError:
return None
class MateLightTCPServer(TCPServer):
def __init__(self, *args, **kwargs):
super(MateLightTCPServer, self).__init__(*args, **kwargs)
# A deque for the texts, contains a tuple of the form (text, width, height)
self.text_deque = deque(maxlen=32)
self.current_text = None
def get_next_frame(self):
if self.current_text is None or self.i > self.current_text[1][0]:
self.current_text = None
try:
self.current_text = self.text_deque.popleft()
self.i = -DISPLAY_WIDTH
except IndexError:
return None
frame = render_text(self.current_text[0], self.i)
self.i += 1
return frame
class MateLightUDPHandler(BaseRequestHandler):
"""
Handles one UDP connection to the matelight
"""
def handle(self):
try:
# Housekeeping - FIXME: This is *so* the wrong place for this.
for k,v in conns.items():
if time() - v.timestamp > UDP_TIMEOUT:
del conns[k]
global current_entry, conns
data = self.request[0].strip()
if len(data) != FRAME_SIZE*3+4:
#raise ValueError('Invalid frame size: Expected {}, got {}'.format(FRAME_SIZE+4, len(data)))
return
frame = data[:-4]
#crc1, = struct.unpack('!I', data[-4:])
#crc2, = zlib.crc32(frame, 0),
#if crc1 != crc2:
# raise ValueError('Invalid frame CRC checksum: Expected {}, got {}'.format(crc2, crc1))
#socket.sendto(b'ACK', self.client_address)
a = np.array(list(frame), dtype=np.uint8)
timestamp = time()
addr = self.client_address[0]
conn = QueueEntry('udp', addr, timestamp, '')
if addr not in conns:
log('\x1B[91mNew UDP connection from\x1B[0m', addr)
current_entry = conn
conns[addr] = current_entry
if current_entry.entrytype == 'udp' and current_entry.remote == addr:
current_entry = conn
frame = a.reshape((DISPLAY_WIDTH, DISPLAY_HEIGHT, 3))
self.server.frame_deque.append(frame)
#sendframe(frame)
printframe(np.pad(frame, ((0,0),(0,0),(0,1)), 'constant', constant_values=(0,0)))
except Exception as e:
log('Error receiving UDP frame:', e)
class MateLightTCPTextHandler(BaseRequestHandler):
def handle(self):
global current_entry, conns
data = str(self.request.recv(1024).strip(), 'UTF-8')
addr = self.client_address[0]
timestamp = time()
if len(data) > 140:
self.request.sendall('TOO MUCH INFORMATION!\n')
return
log('\x1B[95mText from\x1B[0m {}: {}\x1B[0m'.format(addr, data))
#textqueue.append(QueueEntry('text', addr, timestamp, data))
self.server.text_deque.append((data, compute_text_bounds(data)))
self.request.sendall(b'KTHXBYE!\n')
TCPServer.allow_reuse_address = True
tserver = MateLightTCPServer(('', 1337), MateLightTCPTextHandler)
t = threading.Thread(target=tserver.serve_forever)
t.daemon = True
t.start()
UDPServer.allow_reuse_address = True
userver = MateLightUDPServer(('', 1337), MateLightUDPHandler)
t = threading.Thread(target=userver.serve_forever)
t.daemon = True
t.start()
def udp_sub_loop():
"""
If we can get at least one frame from get_next_frame() we will wait
for 1000 frame cycles till we return. If we do not get a valid frame
in the first loop, we return immediatly.
"""
invalid_frames = 300
while True:
next_frame = userver.get_next_frame()
if next_frame is not None:
invalid_frames = 0
sendframe(next_frame)
sleep(0.01)
else:
invalid_frames += 1
sleep(0.01)
if invalid_frames > 300:
break
def tcp_sub_loop():
while True:
next_frame = tserver.get_next_frame()
if next_frame is not None:
sendframe(next_frame)
else:
break
if __name__ == '__main__':
while True:
udp_sub_loop()
tcp_sub_loop()
def bla():
print('\033[2J'+'\n'*9)
while True:
if current_entry.entrytype == 'text':
if scroll(current_entry.text):
if current_entry in textqueue:
textqueue.remove(current_entry)
if textqueue:
current_entry = textqueue[0]
else:
if conns:
current_entry = random.choice(list(conns.values()))
else:
current_entry = next(defaulttexts)
if current_entry.entrytype != 'udp' and textqueue:
current_entry = textqueue[0]
log('\x1B[92mScrolling\x1B[0m', current_entry.text)
if current_entry.entrytype == 'udp':
if time() - current_entry.timestamp > UDP_TIMEOUT:
current_entry = next(defaulttexts)
else:
sleep(0.1)
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