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ce0ef24 | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 | #!/usr/bin/env python3
"""Regression for live source handover; no real TikTok/YouTube requests.
Starting a replacement pump while swap_source=True made the new thread exit before
reading a single byte. FFmpeg was kept alive but YouTube received no replacement media.
"""
import io
import http.server
import json
import shutil
import subprocess
import tempfile
import os
import pathlib
import sys
import threading
import time
import unittest
from unittest.mock import Mock, patch
ROOT = pathlib.Path(sys.argv[1]).resolve() if len(sys.argv) > 1 else pathlib.Path(__file__).parent
sys.path.insert(0, str(ROOT))
os.environ.setdefault('DATA_DIR', tempfile.mkdtemp(prefix='handover-test-data-'))
from relay import Sender
from youtube_manager import ManagedYouTube
class InlineThread:
"""Deterministic scheduler: the new pump runs immediately when start() is called."""
def __init__(self, target, args=(), daemon=False):
self.target = target
self.args = args
self.daemon = daemon
self.started = False
def start(self):
self.started = True
self.target(*self.args)
def join(self, timeout=None):
pass
def is_alive(self):
return False
class Response:
def __init__(self, chunks=(b'replacement media',)):
self.chunks = chunks
self.closed = False
self.reads = 0
def raise_for_status(self):
pass
def iter_content(self, chunk_size=None):
for chunk in self.chunks:
self.reads += 1
yield chunk
def close(self):
self.closed = True
class HandoverTests(unittest.TestCase):
def setUp(self):
self.env = patch.dict(os.environ, {'SOURCE_STALL_TIMEOUT': '0'})
self.env.start()
self.addCleanup(self.env.stop)
self.sender = Sender('/bin/true', lambda *a: None)
self.p = Mock()
self.p.poll.return_value = None
self.p.stdin = io.BytesIO()
self.old_pump = Mock()
self.old_pump.is_alive.return_value = False
self.old_response = Response()
self.new_response = Response()
self.stop = threading.Event()
self.sess = {'last': time.monotonic() - 4, 'max_seconds': 180,
'force_stop': False, 'timeouts': 0, 'error': '', 'ended': True}
self.bridge = Mock()
self.bridge.feed.side_effect = lambda chunk: chunk
self.refresh = Mock(return_value={'url': 'https://example.invalid/source.flv', 'codec': 'h264', 'label': 'hd'})
def attach(self, refresh=None):
with patch('relay.requests.get', return_value=self.new_response), patch('relay.threading.Thread', InlineThread):
return self.sender._try_reattach('alice', self.p, self.bridge, self.sess,
self.stop, refresh or self.refresh, 10, 3, self.old_response, self.old_pump)
def test_new_pump_reads_media_even_when_scheduled_immediately(self):
attached = self.attach()
self.assertIsNotNone(attached)
self.assertEqual(self.new_response.reads, 1)
self.assertEqual(self.p.stdin.getvalue(), b'replacement media')
self.assertEqual(self.sender.snapshot()['source_bytes'], len(b'replacement media'))
self.assertFalse(self.sess['swap_source'])
def test_old_pump_must_stop_before_bridge_is_reused(self):
self.old_pump.is_alive.return_value = True
self.assertIsNone(self.attach())
self.bridge.reconnect.assert_not_called()
self.refresh.assert_not_called()
self.assertEqual(self.new_response.reads, 0)
def test_stop_during_resolution_does_not_resurrect_the_reader(self):
def stop_then_refresh():
self.stop.set()
return self.refresh()
self.assertIsNone(self.attach(stop_then_refresh))
self.bridge.reconnect.assert_not_called()
self.assertEqual(self.new_response.reads, 0)
def test_refresh_does_not_fabricate_source_heartbeat(self):
self.new_response = Response(chunks=())
previous = self.sess['last']
self.assertIsNotNone(self.attach())
self.assertEqual(self.sess['last'], previous)
self.assertEqual(self.sender.snapshot()['source_bytes'], 0)
def test_opened_source_has_bounded_first_byte_grace(self):
previous = self.sess['last']
now = time.monotonic()
self.new_response = Response(chunks=())
self.attach()
self.assertGreater(self.sess['reattach_not_before'], now)
self.assertLessEqual(self.sess['reattach_not_before'], time.monotonic() + 5)
self.assertEqual(self.sess['last'], previous)
def test_cancelled_reader_cannot_deliver_a_late_chunk(self):
cancel = threading.Event()
response = Response()
def late_chunk(_size=None):
cancel.set()
yield b'old reader late packet'
response.iter_content = late_chunk
with patch('relay.threading.Thread', InlineThread):
self.sender._pump_source(response, self.p, self.bridge, self.stop,
self.sess, 10, 3, cancel)
self.assertEqual(self.p.stdin.getvalue(), b'')
self.assertEqual(self.sender.snapshot()['source_bytes'], 0)
def test_no_source_is_a_failed_handover_not_a_fake_success(self):
self.refresh.return_value = None
self.assertIsNone(self.attach())
self.bridge.reconnect.assert_not_called()
class CanvasTests(unittest.TestCase):
def test_placeholder_16x16_does_not_pin_the_live_canvas(self):
sender = Sender('/bin/true', lambda *a: None)
self.assertEqual(sender.lock_gold({'width': 16, 'height': 16}), (0, 0))
self.assertEqual(sender.lock_gold({'width': 720, 'height': 1440}), (720, 1280))
def test_unknown_or_placeholder_matchgop_uses_safe_constant_canvas(self):
for candidate in ({}, {'width': 16, 'height': 16}):
sender = Sender('/bin/true', lambda *a: None)
sender.mode_override = 'matchgop'
args = sender.command('test.flv', candidate)
vf = args[args.index('-vf') + 1]
self.assertIn('scale=w=720:h=1280:', vf)
# A later real configuration does not mutate the encoder canvas.
sender.lock_gold({'width': 960, 'height': 1920})
self.assertEqual((sender._gop_w, sender._gop_h), (720, 1280))
def test_normal_and_real_1080_source_dimensions_remain_supported(self):
for size in ((160, 120), (320, 240), (1080, 1920)):
sender = Sender('/bin/true', lambda *a: None)
self.assertEqual(sender.lock_gold({'width': size[0], 'height': size[1]}), size)
class CachedSourceTests(unittest.TestCase):
def setUp(self):
self.tmp = tempfile.TemporaryDirectory()
self.addCleanup(self.tmp.cleanup)
self.manager = ManagedYouTube('/bin/true', lambda u, force=False: None,
lambda *a: None, lambda: ['alice'], pathlib.Path(self.tmp.name) / 'journal.json')
self.manager.video_sources = lambda sources: list(sources)
self.hd = {'url': 'https://example.invalid/hd.flv', 'media': 'flv', 'codec': 'h264',
'quality_name': 'hd', 'width': 720, 'height': 1280, 'label': 'hd'}
self.sd = dict(self.hd, url='https://example.invalid/sd.flv', quality_name='sd',
width=480, height=854, label='sd')
self.obs = {'status': 'live', 'room_id': 'same-room', 'sources': [self.hd, self.sd]}
self.manager._observe = Mock(return_value=self.obs)
def test_recent_compatible_source_is_reused_without_blocking_metadata_lookup(self):
self.manager._held['alice'] = (time.monotonic(), self.obs)
chosen = self.manager._refresh_flv('alice', self.hd)
self.assertEqual(chosen['url'], self.sd['url'])
self.manager._observe.assert_not_called()
def test_stale_source_snapshot_requires_fresh_lookup(self):
self.manager._held['alice'] = (time.monotonic() - 60, self.obs)
self.assertEqual(self.manager._refresh_flv('alice', self.hd)['url'], self.sd['url'])
self.manager._observe.assert_called_once_with('alice', force=True, bypass_throttle=True, allow_hold=False)
def test_cache_with_wrong_codec_cannot_be_spliced_into_open_publisher(self):
self.manager._held['alice'] = (time.monotonic(), dict(self.obs, sources=[dict(self.sd, codec='h265')]))
chosen = self.manager._refresh_flv('alice', self.hd)
self.assertEqual(chosen['codec'], 'h264')
self.manager._observe.assert_called_once()
@unittest.skipUnless(shutil.which('ffmpeg') and shutil.which('ffprobe'), 'FFmpeg required')
class RealHTTPContinuityTests(unittest.TestCase):
def run_continuity(self, mode):
with tempfile.TemporaryDirectory(prefix='source-handover-media-') as tmp:
root = pathlib.Path(tmp)
source = root / 'generated.flv'
output = root / 'output.flv'
subprocess.run([shutil.which('ffmpeg'), '-v', 'error', '-y', '-f', 'lavfi',
'-i', 'testsrc2=size=160x120:rate=20', '-f', 'lavfi', '-i', 'sine=sample_rate=48000',
'-t', '2', '-c:v', 'libx264', '-preset', 'ultrafast', '-pix_fmt', 'yuv420p',
'-g', '20', '-c:a', 'aac', '-f', 'flv', str(source)], check=True, capture_output=True)
media = source.read_bytes()
calls = []
class Handler(http.server.BaseHTTPRequestHandler):
def log_message(self, *a):
pass
def do_GET(self):
calls.append(time.monotonic())
self.send_response(200)
self.send_header('Content-Type', 'video/x-flv')
self.send_header('Content-Length', str(len(media)))
self.end_headers()
# Header arrives immediately; replacements wait before their first byte.
# Without startup grace the supervisor closes them before this media arrives.
if len(calls) > 1:
time.sleep(1)
try:
self.wfile.write(media)
self.wfile.flush()
except (OSError, BrokenPipeError):
pass
server = http.server.ThreadingHTTPServer(('127.0.0.1', 0), Handler)
server.daemon_threads = True
server_thread = threading.Thread(target=server.serve_forever, daemon=True)
server_thread.start()
stop = threading.Event()
errors = []
candidate = {'url': 'http://127.0.0.1:%d/source.flv' % server.server_port,
'media': 'flv', 'codec': 'h264', 'label': 'fixture', 'width': 160, 'height': 120}
sender = Sender(shutil.which('ffmpeg'), lambda *a: None)
sender.mode_override = mode
spawned = []
from relay import subprocess as relay_subprocess
real_popen = relay_subprocess.Popen
def track_process(*a, **kw):
child = real_popen(*a, **kw)
spawned.append(child)
return child
def send():
try:
sender.send('fixture', candidate, str(output), stop, refresh=lambda: dict(candidate))
except Exception as exc:
errors.append(exc)
env = {'SOURCE_STALL_TIMEOUT': '3', 'YOUTUBE_REATTACH_GRACE_SECONDS': '2',
'YOUTUBE_SOURCE_READ_TIMEOUT': '5', 'YOUTUBE_PUMP_JOIN_SECONDS': '2',
'YOUTUBE_SEND_MODE': mode, 'YOUTUBE_VIDEO_MODE': 'original',
'YOUTUBE_AUTO_TRANSCODE': '0', 'YOUTUBE_X264_PRESET': 'ultrafast'}
thread = None
try:
with patch.dict(os.environ, env), patch('relay.subprocess.Popen', side_effect=track_process):
thread = threading.Thread(target=send, daemon=True)
thread.start()
time.sleep(7.5)
alive = thread.is_alive() and sender.alive()
snapshot = sender.snapshot()
stop.set()
thread.join(6)
self.assertTrue(alive, 'Publisher ended instead of reusing the delayed replacement source: %r' % errors)
self.assertFalse(errors, repr(errors))
self.assertEqual(len(spawned), 1, 'Source reconnect must keep the same FFmpeg process')
self.assertGreaterEqual(len(calls), 3)
self.assertGreater(snapshot.get('output_seconds', 0), 4)
self.assertFalse(thread.is_alive(), 'Sender did not stop cleanly')
probe = subprocess.run([shutil.which('ffprobe'), '-v', 'error', '-show_entries',
'format=duration', '-of', 'json', str(output)], check=True, capture_output=True, text=True)
self.assertGreater(float(json.loads(probe.stdout)['format']['duration']), 4)
finally:
stop.set()
sender.terminate()
if thread:
thread.join(5)
server.shutdown()
server.server_close()
def test_eof_and_delayed_replacements_keep_same_copy_publisher(self):
self.run_continuity('copy')
def test_eof_and_delayed_replacements_keep_same_matchgop_publisher(self):
self.run_continuity('matchgop')
if __name__ == '__main__':
unittest.main(argv=[sys.argv[0]], verbosity=2)
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