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#!/usr/bin/env python
from socketserver import *
from time import time, strftime, sleep
from collections import namedtuple
from itertools import product, cycle
import threading
import random
from ctypes import CDLL, POINTER, c_void_p, Structure, c_uint8, c_size_t, cast, addressof
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)
unifont = bdf.read_bdf_file('unifont.bdf')
def render_text(text):
assert unifont
fb = bdf.framebuffer_render_text(bytes(str(text), 'UTF-8'), unifont)
fbd = fb.contents
buf = np.ctypeslib.as_array(cast(fbd.data, POINTER(c_uint8)), shape=(fbd.h, fbd.w, 4))
# Set data pointer to NULL before freeing framebuffer struct to prevent free_framebuffer from also freeing the data
# buffer that is now used by numpy
#bdf.console_render_buffer(fb)
fbd.data = cast(c_void_p(), POINTER(COLOR))
bdf.free_framebuffer(fb)
return buf
printlock = threading.Lock()
def printframe(fb):
h,w,_ = 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()
def scroll(text):
""" Returns whether it could scroll all the text uninterrupted """
log('Scrolling', text)
fb = render_text(text);
h,w,_ = fb.shape
for i in range(-DISPLAY_WIDTH,w+1):
# if current_entry.entrytype == 'udp' or (textqueue and current_entry in defaulttexts):
# log('Aborting rendering due to new input')
# return False
leftpad = np.zeros((DISPLAY_HEIGHT, max(-i, 0), 4), dtype=np.uint8)
framedata = fb[:, max(0, i):min(i+DISPLAY_WIDTH, w)]
rightpad = np.zeros((DISPLAY_HEIGHT, min(DISPLAY_WIDTH, max(0, i+DISPLAY_WIDTH-w)), 4), dtype=np.uint8)
dice = np.concatenate((leftpad, framedata, rightpad), 1)
sendframe(dice)
printframe(dice)
fb = render_text(text);
return True
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('[%m-%d %H:%M:%S]'), ' '.join(str(arg) for arg in args), '\x1B[0m')
printlock.release()
class MateLightUDPHandler(BaseRequestHandler):
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('New UDP connection from', 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_HEIGHT, DISPLAY_WIDTH, 3))
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('Text from {}: {}\x1B[0m'.format(addr, data))
textqueue.append(QueueEntry('text', addr, timestamp, data))
self.request.sendall(b'KTHXBYE!\n')
TCPServer.allow_reuse_address = True
server = TCPServer(('', 1337), MateLightTCPTextHandler)
t = threading.Thread(target=server.serve_forever)
t.daemon = True
t.start()
UDPServer.allow_reuse_address = True
userver = UDPServer(('', 1337), MateLightUDPHandler)
t = threading.Thread(target=userver.serve_forever)
t.daemon = True
t.start()
if __name__ == '__main__':
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]
if current_entry.entrytype == 'udp':
if time() - current_entry.timestamp > UDP_TIMEOUT:
current_entry = next(defaulttexts)
else:
sleep(0.1)
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