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"""
MIT License
Copyright (C) 2023 ROCKY4546
https://github.com/rocky4546
This file is part of Cabernet
Permission is hereby granted, free of charge, to any person obtaining a copy of this software
and associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.
"""
import datetime
import errno
import os
import queue
import re
import socket
import threading
import time
import urllib.parse
from multiprocessing import Queue, Process
import lib.common.exceptions as exceptions
import lib.common.utils as utils
import lib.m3u8 as m3u8
import lib.streams.m3u8_queue as m3u8_queue
from lib.streams.video import Video
from lib.streams.atsc import ATSCMsg
from lib.streams.thread_queue import ThreadQueue
from lib.db.db_config_defn import DBConfigDefn
from lib.db.db_channels import DBChannels
from lib.clients.web_handler import WebHTTPHandler
from .stream import Stream
MAX_OUT_QUEUE_SIZE = 30
IDLE_COUNTER_MAX = 110 # four times the timeout * retries to terminate the stream in seconds set in config!
STARTUP_IDLE_COUNTER = 40 # time to wait for an initial stream
# code assumes a timeout response in TVH of 15 or higher.
class InternalProxy(Stream):
is_m3u8_starting = 0
def __init__(self, _plugins, _hdhr_queue):
global MAX_OUT_QUEUE_SIZE
self.last_refresh = None
self.channel_dict = None
self.wfile = None
self.file_filter = None
self.t_m3u8 = None
self.t_m3u8_pid = None
self.duration = 6
self.last_ts_filename = ''
super().__init__(_plugins, _hdhr_queue)
self.db_configdefn = DBConfigDefn(self.config)
self.db_channels = DBChannels(self.config)
self.video = Video(self.config)
self.atsc = ATSCMsg()
self.initialized_psi = False
self.in_queue = Queue()
self.t_queue = None
self.out_queue = queue.Queue(maxsize=MAX_OUT_QUEUE_SIZE)
self.terminate_queue = None
self.tc_match = re.compile(r'^.+\D+(\d*)\.ts')
self.idle_counter = 0
self.tuner_no = -1
# last time the idle counter was reset
self.last_reset_time = datetime.datetime.now()
self.last_atsc_msg = 0
self.filter_counter = 0
self.is_starting = True
self.cue = False
def terminate(self, *args):
self.t_queue.del_thread(threading.get_ident())
time.sleep(0.01)
self.in_queue.put({'thread_id': threading.get_ident(), 'uri': 'terminate'})
time.sleep(0.01)
# since t_m3u8 has been told to terminate, clear the
# out queue and then wait for t_m3u8, so it can clean up ffmpeg
# queue is not guaranteed to have terminate, so let t_queue know this thread is ending
count = 10
while str(self.t_queue) == '0' and self.t_queue.is_alive() and count > 0:
time.sleep(1.0)
count -= 1
if not self.t_queue.is_alive():
self.t_m3u8.join(timeout=15)
if self.t_m3u8.is_alive():
# this is not likely but if t_m3u8 does not self terminate then force it to terminate
self.logger.debug(
'm3u8 queue failed to self terminate. Forcing it to terminate {}'
.format(self.t_m3u8_pid))
self.clear_queues()
self.t_m3u8.terminate()
self.t_m3u8 = None
self.clear_queues()
def stream(self, _channel_dict, _wfile, _terminate_queue, _tuner_no):
"""
Processes m3u8 interface without using ffmpeg
"""
global IDLE_COUNTER_MAX
self.tuner_no = _tuner_no
self.config = self.db_configdefn.get_config()
IDLE_COUNTER_MAX = self.config[self.namespace.lower()]['stream-g_stream_timeout']
self.channel_dict = _channel_dict
if not self.start_m3u8_queue_process():
self.terminate()
return
self.wfile = _wfile
self.terminate_queue = _terminate_queue
while True:
try:
self.check_termination()
self.play_queue()
if self.t_m3u8 and not self.t_m3u8.is_alive():
break
except IOError as ex:
# Check we hit a broken pipe when trying to write back to the client
if ex.errno in [errno.EPIPE, errno.ECONNABORTED, errno.ECONNRESET, errno.ECONNREFUSED]:
# Normal process. Client request end of stream
self.logger.info(
'Connection dropped by end device {} {}'
.format(ex, self.t_m3u8_pid))
break
else:
self.logger.error('{}{} {} {}'.format(
'UNEXPECTED EXCEPTION=', ex, self.t_m3u8_pid, socket.getdefaulttimeout()))
raise
except exceptions.CabernetException as ex:
self.logger.info('{} {}'.format(ex, self.t_m3u8_pid))
break
self.terminate()
def check_termination(self):
if not self.terminate_queue.empty():
raise exceptions.CabernetException("Termination Requested")
def clear_queues(self):
"""
out_queue cannot be closed since it is a normal queue.
The others are handled elsewhere
"""
pass
def play_queue(self):
global MAX_OUT_QUEUE_SIZE
global IDLE_COUNTER_MAX
if not self.cue:
self.update_idle_counter()
if self.is_starting and self.idle_counter > STARTUP_IDLE_COUNTER:
# we need to terminate this feed. Some providers require a
# retry in order to make it work.
self.idle_counter = 0
self.last_reset_time = datetime.datetime.now()
self.last_atsc_msg = 0
self.logger.info(
'1 Provider has not started playing the stream. Terminating the connection {}'
.format(self.t_m3u8_pid))
raise exceptions.CabernetException(
'2 Provider has not started playing the stream. Terminating the connection {}'
.format(self.t_m3u8_pid))
elif self.idle_counter > self.filter_counter + IDLE_COUNTER_MAX:
self.idle_counter = 0
self.last_atsc_msg = 0
self.last_reset_time = datetime.datetime.now()
self.filter_counter = 0
self.logger.info(
'1 Provider has stop playing the stream. Terminating the connection {}'
.format(self.t_m3u8_pid))
raise exceptions.CabernetException(
'2 Provider has stop playing the stream. Terminating the connection {}'
.format(self.t_m3u8_pid))
elif self.idle_counter > self.last_atsc_msg+6 \
and self.is_starting:
self.last_atsc_msg = self.idle_counter
self.write_atsc_msg()
elif self.idle_counter > self.last_atsc_msg+14:
self.last_atsc_msg = self.idle_counter
self.update_tuner_status('No Reply')
self.logger.debug('1 Requesting status from m3u8_queue {}'.format(self.t_m3u8_pid))
self.in_queue.put({'thread_id': threading.get_ident(), 'uri': 'status'})
if not self.is_starting \
and self.config[self.channel_dict['namespace'].lower()] \
['player-send_atsc_keepalive']:
self.write_atsc_msg()
while True:
try:
out_queue_item = self.out_queue.get(timeout=1)
except queue.Empty:
break
if out_queue_item['atsc'] is not None:
self.channel_dict['atsc'] = out_queue_item['atsc']
self.db_channels.update_channel_atsc(
self.channel_dict)
uri = out_queue_item['uri']
if uri == 'terminate':
raise exceptions.CabernetException(
'm3u8 queue termination requested, aborting stream {} {}'
.format(self.t_m3u8_pid, threading.get_ident()))
elif uri == 'running':
self.logger.debug('1 Status of Running returned from m3u8_queue {}'.format(self.t_m3u8_pid))
continue
elif uri == 'extend':
self.logger.debug('Extending the idle timeout to {} seconds'.format(self.idle_counter+IDLE_COUNTER_MAX))
self.filter_counter = self.idle_counter
continue
data = out_queue_item['data']
if data['cue'] == 'in':
self.cue = False
self.logger.debug('Turning M3U8 cue to False')
elif data['cue'] == 'out':
self.cue = True
self.logger.debug('Turning M3U8 cue to True')
if data['filtered']:
self.process_filtered_packet(uri)
else:
self.video.data = out_queue_item['stream']
if self.video.data is not None:
self.idle_counter = 0
self.last_atsc_msg = 0
self.last_reset_time = datetime.datetime.now()
self.filter_counter = 0
if self.config['stream']['update_sdt']:
self.atsc.update_sdt_names(self.video,
self.channel_dict['namespace'].encode(),
self.set_service_name(self.channel_dict).encode())
self.duration = data['duration']
uri_decoded = urllib.parse.unquote(uri)
if self.check_ts_counter(uri_decoded):
# if the length of the video is tiny, then print the string out
if len(self.video.data) < 2000 and len(self.video.data) % 188 != 0 or self.video.data.startswith(b'<'):
self.logger.info('{} {} Not a Video packet, restarting HTTP Session, data: {} {}'
.format(self.t_m3u8_pid, uri_decoded, len(self.video.data), self.video.data))
self.update_tuner_status('Bad Data')
self.in_queue.put({'thread_id': threading.get_ident(), 'uri': 'restart_http'})
else:
start_ttw = time.time()
self.write_buffer(self.video.data)
delta_ttw = time.time() - start_ttw
self.update_tuner_status('Streaming')
self.logger.info(
'Serving {} {} ({})s ({}B) ttw:{:.2f}s {}'
.format(self.t_m3u8_pid, uri_decoded, self.duration,
len(self.video.data), delta_ttw, threading.get_ident()))
self.is_starting = False
time.sleep(0.1)
else:
if not self.is_starting:
self.update_tuner_status('No Reply')
uri_decoded = urllib.parse.unquote(uri)
self.logger.debug(
'No Video Stream from Provider {} {}'
.format(self.t_m3u8_pid, uri_decoded))
self.check_termination()
time.sleep(0.01)
self.video.terminate()
def process_filtered_packet(self, _uri):
"""
Assumes the queued item has been pulled and is a filtered item.
"""
self.last_atsc_msg = self.idle_counter
self.filter_counter = self.idle_counter
self.logger.info('Filtered Msg {} {}'.format(self.t_m3u8_pid, urllib.parse.unquote(_uri)))
self.update_tuner_status('Filtered')
# self.write_buffer(out_queue_item['stream'])
if self.is_starting:
self.is_starting = False
self.write_atsc_msg()
self.logger.debug('2 Requesting Status from m3u8_queue {}'.format(self.t_m3u8_pid))
self.in_queue.put({'thread_id': threading.get_ident(), 'uri': 'status'})
time.sleep(0.5)
def write_buffer(self, _data):
"""
Plan is to slowly push out bytes until something is
added to the queue to process. This should stop the
clients from terminating the data stream due to lack of data for
a short. It is currently set to at least 20 seconds of data
before it stops transmitting
"""
try:
bytes_written = 0
count = 0
bytes_per_write = int(len(_data)/25) # number of seconds to keep transmitting
while self.out_queue.qsize() < 1 or \
(self.out_queue.qsize() > 0 and \
self.out_queue.queue[0]['data'] is not None and \
self.out_queue.queue[0]['data']['filtered']):
self.wfile.flush()
# Do not use chunk writes! Just send data.
# x = self.wfile.write('{}\r\n'.format(len(_data)).encode())
next_buffer_write = bytes_written + bytes_per_write
if next_buffer_write >= len(_data):
x = self.wfile.write(_data[bytes_written:])
bytes_written = len(_data)
self.wfile.flush()
break
else:
count += 1
if count > 13:
self.update_tuner_status('No Reply')
x = self.wfile.write(_data[bytes_written:next_buffer_write])
bytes_written = next_buffer_write
# x = self.wfile.write('\r\n'.encode())
self.wfile.flush()
time.sleep(1.0)
# special filtered packet processing
if self.out_queue.qsize() > 0 and \
self.out_queue.queue[0]['data'] is not None and \
self.out_queue.queue[0]['data']['filtered']:
# pull queue item and check to confirm it is filtered
try:
out_queue_item = self.out_queue.get(timeout=1)
except queue.Empty:
# no queue item. Should not happen
self.logger.warning('Unexpected Error: Expected filtered packet, but found no items in queue')
continue
if out_queue_item['data']['filtered']:
self.process_filtered_packet(out_queue_item['uri'])
bytes_per_write = 752 # change writes to a
# # small number so it does not exit during the filtered packets
else:
# somehow NOT filtered, log this issue
self.logger.warning('Unexpected Error: Found unfiltered packet when a filtered packet was expected')
if bytes_written != len(_data):
x = self.wfile.write(_data[bytes_written:])
self.wfile.flush()
except socket.timeout:
raise
except IOError:
raise
return x
def write_atsc_msg(self):
if not self.channel_dict['atsc']:
self.logger.debug(
'No video data, Sending Empty ATSC Msg {}'
.format(self.t_m3u8_pid))
self.write_buffer(
self.atsc.format_video_packets())
else:
self.logger.debug(
'No video data, Sending Default ATSC Msg for channel {}'
.format(self.t_m3u8_pid))
self.write_buffer(
self.atsc.format_video_packets(
self.channel_dict['atsc']))
def get_ts_counter(self, _uri):
m = self.tc_match.findall(_uri)
if len(m) == 0:
return '', 0
else:
self.logger.debug('ts_counter {} {}'.format(m, _uri))
x_tuple = m[len(m) - 1]
if len(x_tuple) == 0:
x_tuple = (_uri, '0')
else:
x_tuple = (_uri, x_tuple)
return x_tuple
def update_tuner_status(self, _status):
ch_num = self.channel_dict['display_number']
namespace = self.channel_dict['namespace']
scan_list = WebHTTPHandler.rmg_station_scans[namespace]
tuner = scan_list[self.tuner_no]
if type(tuner) == dict and tuner['ch'] == ch_num:
WebHTTPHandler.rmg_station_scans[namespace][self.tuner_no]['status'] = _status
def update_idle_counter(self):
"""
Updates the idle_counter to the nearest int in seconds
based on when it was last reset
"""
current_time = datetime.datetime.now()
delta_time = current_time - self.last_reset_time
self.idle_counter = int(delta_time.total_seconds())
def check_ts_counter(self, _uri):
"""
Providers sometime add the same stream section back into the list.
This methods catches this and informs the caller that it should be ignored.
"""
# counter = self.tc_match.findall(uri_decoded)
# if len(counter) != 0:
# counter = counter[0]
# else:
# counter = -1
# self.logger.debug('ts counter={}'.format(counter))
if _uri == self.last_ts_filename:
self.logger.notice(
'TC Counter Same section being transmitted, ignoring uri: {} m3u8pid:{} proxypid:{}'
.format(_uri, self.t_m3u8_pid, os.getpid()))
return False
self.last_ts_filename = _uri
return True
def start_m3u8_queue_process(self):
"""
Python sometimes starts a process where it is not connected to the parent,
so the queues do not interact. The process is killed and restarted
until python can do this correctly.
"""
is_running = False
max_tries = 40
restarts = 5
while True:
while InternalProxy.is_m3u8_starting != 0:
time.sleep(0.1)
InternalProxy.is_m3u8_starting = threading.get_ident()
time.sleep(0.01)
if InternalProxy.is_m3u8_starting == threading.get_ident():
break
ch_num = self.channel_dict['display_number']
namespace = self.channel_dict['namespace']
scan_list = WebHTTPHandler.rmg_station_scans[namespace]
tuner = scan_list[self.tuner_no]
m3u8_out_queue = None
if isinstance(tuner, dict) \
and tuner['ch'] == ch_num \
and tuner['instance'] == self.instance:
if not tuner['mux']:
# new tuner case
m3u8_out_queue = Queue(maxsize=MAX_OUT_QUEUE_SIZE)
self.t_queue = ThreadQueue(m3u8_out_queue, self.config)
self.t_queue.add_thread(threading.get_ident(), self.out_queue)
self.t_queue.status_queue = self.in_queue
WebHTTPHandler.rmg_station_scans[namespace][self.tuner_no]['mux'] = self.t_queue
else:
# reuse tuner case
self.t_queue = tuner['mux']
self.t_queue.add_thread(threading.get_ident(), self.out_queue)
self.t_m3u8 = self.t_queue.remote_proc
self.t_m3u8_pid = self.t_queue.remote_proc.pid
self.in_queue = self.t_queue.status_queue
while not is_running and restarts > 0:
restarts -= 1
# Process is not thread safe. Must do the same target, one at a time.
self.in_queue.put({'thread_id': threading.get_ident(), 'uri': 'status'})
self.logger.debug('3 Requesting status from m3u8_queue {}'.format(self.t_m3u8_pid))
if m3u8_out_queue:
self.logger.debug('Starting m3u8 queue process')
self.t_m3u8 = Process(target=m3u8_queue.start, args=(
self.config, self.plugins, self.in_queue, m3u8_out_queue, self.channel_dict,))
self.t_m3u8.start()
self.t_queue.remote_proc = self.t_m3u8
self.t_m3u8_pid = self.t_m3u8.pid
time.sleep(0.1)
tries = 0
while self.out_queue.empty() and tries < max_tries:
tries += 1
time.sleep(0.2)
if tries >= max_tries:
self.m3u8_terminate()
else:
try:
# queue is not empty, but it sticks here anyway...
status = self.out_queue.get(False, 3)
except queue.Empty:
self.m3u8_terminate()
continue
if status['uri'] == 'terminate':
self.logger.debug('Receive request to terminate from m3u8_queue {}'.format(self.t_m3u8_pid))
InternalProxy.is_m3u8_starting = False
return False
elif status['uri'] == 'running':
self.logger.debug('2 Status of Running returned from m3u8_queue {}'.format(self.t_m3u8_pid))
is_running = True
else:
self.logger.warning(
'Unknown response from m3u8queue: {}'
.format(status['uri']))
else:
is_running = True
InternalProxy.is_m3u8_starting = False
return restarts > 0
def m3u8_terminate(self):
while not self.in_queue.empty():
try:
self.in_queue.get()
time.sleep(0.1)
except (queue.Empty, EOFError):
pass
if self.t_m3u8:
self.t_m3u8.terminate()
self.t_m3u8.join()
self.logger.debug(
'm3u8_queue did not start correctly, restarting {}'
.format(self.channel_dict['uid']))
try:
while not self.out_queue.empty():
self.out_queue.get()
except (queue.Empty, EOFError):
pass
self.clear_queues()
time.sleep(0.1)
self.in_queue = Queue()
self.out_queue = queue.Queue(maxsize=MAX_OUT_QUEUE_SIZE)
self.t_queue.add_thread(threading.get_ident(), self.out_queue)
self.t_queue.status_queue = self.in_queue
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