File size: 10,104 Bytes
27867f1 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 |
"""
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 errno
import subprocess
import time
from lib.clients.web_handler import WebHTTPHandler
from lib.streams.video import Video
from lib.db.db_config_defn import DBConfigDefn
from .stream import Stream
from .stream_queue import StreamQueue
from .pts_validation import PTSValidation
MAX_IDLE_TIMER = 59
class FFMpegProxy(Stream):
def __init__(self, _plugins, _hdhr_queue):
self.ffmpeg_proc = None
self.last_refresh = None
self.block_prev_time = None
self.buffer_prev_time = None
self.small_pkt_streaming = False
self.block_max_pts = 0
self.block_prev_pts = 0
self.prev_last_pts = 0
self.default_duration = 0
self.block_moving_avg = 0
self.channel_dict = None
self.write_buffer = None
self.stream_queue = None
self.pts_validation = None
self.tuner_no = -1
super().__init__(_plugins, _hdhr_queue)
self.db_configdefn = DBConfigDefn(self.config)
self.video = Video(self.config)
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 stream(self, _channel_dict, _write_buffer, _tuner_no):
global MAX_IDLE_TIMER
self.logger.info('Using ffmpeg_proxy for channel {}'.format(_channel_dict['uid']))
self.tuner_no = _tuner_no
self.channel_dict = _channel_dict
self.write_buffer = _write_buffer
self.config = self.db_configdefn.get_config()
MAX_IDLE_TIMER = self.config[self.namespace.lower()]['stream-g_stream_timeout']
self.pts_validation = PTSValidation(self.config, self.channel_dict)
channel_uri = self.get_stream_uri(self.channel_dict)
if not channel_uri:
self.logger.warning('Unknown Channel {}'.format(_channel_dict['uid']))
return
self.ffmpeg_proc = self.open_ffmpeg_proc(channel_uri)
time.sleep(0.01)
self.last_refresh = time.time()
self.block_prev_time = self.last_refresh
self.buffer_prev_time = self.last_refresh
self.read_buffer()
while True:
if not self.video.data:
self.logger.info(
'No Video Data, refreshing stream {} {}'
.format(_channel_dict['uid'], self.ffmpeg_proc.pid))
self.ffmpeg_proc = self.refresh_stream()
else:
try:
self.validate_stream()
self.update_tuner_status('Streaming')
start_ttw = time.time()
self.write_buffer.write(self.video.data)
delta_ttw = time.time() - start_ttw
self.logger.info(
'Serving {} {} ({}B) ttw:{:.2f}s'
.format(self.ffmpeg_proc.pid, _channel_dict['uid'],
len(self.video.data), delta_ttw))
except IOError as e:
if e.errno in [errno.EPIPE, errno.ECONNABORTED, errno.ECONNRESET, errno.ECONNREFUSED]:
self.logger.info('1. Connection dropped by end device {}'.format(self.ffmpeg_proc.pid))
break
else:
self.logger.error('{}{}'.format(
'1 UNEXPECTED EXCEPTION=', e))
raise
try:
self.read_buffer()
except exceptions.CabernetException as ex:
self.logger.info('{} {}'.format(ex, self.ffmpeg_proc.pid))
break
except Exception as e:
self.logger.error('{}{}'.format(
'2 UNEXPECTED EXCEPTION=', e))
break
self.terminate_stream()
def validate_stream(self):
if not self.config[self.config_section]['player-enable_pts_filter']:
return
has_changed = True
while has_changed:
has_changed = False
results = self.pts_validation.check_pts(self.video.data)
if results['byteoffset'] != 0:
if results['byteoffset'] < 0:
self.write_buffer.write(self.video.data[-results['byteoffset']:len(self.video.data) - 1])
else:
self.write_buffer.write(self.video.data[0:results['byteoffset']])
has_changed = True
if results['refresh_stream']:
self.ffmpeg_proc = self.refresh_stream()
self.read_buffer()
has_changed = True
if results['reread_buffer']:
self.read_buffer()
has_changed = True
return
def read_buffer(self):
global MAX_IDLE_TIMER
data_found = False
self.video.data = None
idle_timer = MAX_IDLE_TIMER # time slice segments are less than 10 seconds
while not data_found:
self.video.data = self.stream_queue.read()
if self.video.data:
data_found = True
else:
time.sleep(1)
idle_timer -= 1
if idle_timer < 1:
idle_timer = MAX_IDLE_TIMER # time slice segments are less than 10 seconds
self.logger.info(
'No Video Data, refreshing stream {}'
.format(self.ffmpeg_proc.pid))
self.ffmpeg_proc = self.refresh_stream()
elif int(MAX_IDLE_TIMER / 2) == idle_timer:
self.update_tuner_status('No Reply')
return
def terminate_stream(self):
self.logger.debug('Terminating ffmpeg stream {}'.format(self.ffmpeg_proc.pid))
while True:
try:
self.ffmpeg_proc.terminate()
self.ffmpeg_proc.wait(timeout=1.5)
break
except ValueError:
pass
except subprocess.TimeoutExpired:
time.sleep(0.01)
def refresh_stream(self):
self.last_refresh = time.time()
channel_uri = self.get_stream_uri(self.channel_dict)
self.terminate_stream()
self.logger.debug('{}{}'.format(
'Refresh Stream channelUri=', channel_uri))
ffmpeg_process = self.open_ffmpeg_proc(channel_uri)
# make sure the previous ffmpeg is terminated before exiting
self.buffer_prev_time = time.time()
return ffmpeg_process
def open_ffmpeg_proc_locast(self, _channel_uri):
"""
ffmpeg drops the first 9 frame/video packets when the program starts.
this means everytime a refresh occurs, 9 frames will be dropped. This is
visible by looking at the video packets for a 6 second window being 171
instead of 180. Following the first read, the packets increase to 180.
"""
ffmpeg_command = [
self.config['paths']['ffmpeg_path'],
'-i', str(_channel_uri),
'-f', 'mpegts',
'-nostats',
'-hide_banner',
'-loglevel', 'warning',
'-copyts',
'pipe:1']
ffmpeg_process = subprocess.Popen(
ffmpeg_command,
stdout=subprocess.PIPE,
bufsize=-1)
self.stream_queue = StreamQueue(188, ffmpeg_process, self.channel_dict['uid'])
time.sleep(0.1)
return ffmpeg_process
def open_ffmpeg_proc(self, _channel_uri):
"""
ffmpeg drops the first 9 frame/video packets when the program starts.
this means everytime a refresh occurs, 9 frames will be dropped. This is
visible by looking at the video packets for a 6 second window being 171
instead of 180. Following the first read, the packets increase to 180.
"""
header = self.channel_dict['json'].get('Header')
str_array = []
if header:
str_array.append('-headers')
header_value = ''
for key, value in header.items():
header_value += key+': '+value+'\r\n'
if key == 'Referer':
self.logger.debug('Using HTTP Referer: {} Channel: {}'.format(value, self.channel_dict['uid']))
str_array.append(header_value)
ffmpeg_options = [
'-i', str(_channel_uri),
'-nostats',
'-hide_banner',
'-fflags', '+genpts',
'-threads', '2',
'-loglevel', 'quiet',
'-c', 'copy',
'-f', 'mpegts',
'-c', 'copy',
'pipe:1']
ffmpeg_command = [
self.config['paths']['ffmpeg_path']
]
# Header option must come first in the options list
if str_array:
ffmpeg_command.extend(str_array)
ffmpeg_command.extend(ffmpeg_options)
ffmpeg_process = subprocess.Popen(
ffmpeg_command,
stdout=subprocess.PIPE,
bufsize=-1)
self.stream_queue = StreamQueue(188, ffmpeg_process, self.channel_dict['uid'])
time.sleep(0.1)
return ffmpeg_process
|