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import threading
import time
import mpv
from blc2.workspace import Workspace
from blc2.topology import Fixture
class Renderer:
def hold(self, values):
with self._lock:
if isinstance(values, dict):
values = values.items()
for c, v in values:
if v is None:
if c in self._hold:
del self._hold[c]
else:
self._hold[c] = v
## Rely on the run thread to update when possible
if not self._running:
## If not, just update now
self._update()
def clear_hold(self):
with self._lock:
self._hold = {}
self.hold(())
def _update(self):
with self._lock:
self._values = {c: (v if c not in self._hold else self._hold[c]) for c, v in self._last.items()}
self.output.set_values(self._values)
def start(self):
with self._lock:
if self._run_thread is not None:
raise ValueError("Already running")
self._run_thread = threading.Thread(target=self._run)
self._running = True
self._run_thread.start()
def stop(self):
with self._lock:
self._running = False
def set_functions(self, *args):
with self._lock:
if self._running:
raise ValueError("Can't change while running")
self._functions, self._data = [i[0] for i in args], [i[1] for i in args]
@property
def time(self):
with self._lock:
return self._current
def _run(self):
audio_cache = {}
sleep = 1/60
next_ap = []
ap = []
running_ap = set()
t = 0
start = time.monotonic()
while True:
## w_lock here is a formality: by assumption, we're not editing while we're
## running a show
with self._lock, self.w_lock:
self._update()
for a in next_ap:
a.pause = False
next_ap = []
if self._callback is not None:
self._callback(self._current, self._values)
## FIXME: Cleanup finished audio players?
## FIXME: Handle audio fades and jumps
next_t = sleep + time.monotonic()
self._current = next_t - start
t = int(1000*self._current)
_last = {c: 0 for c in self._channels}
for n, (f, d) in enumerate(zip(self._functions, self._data)):
lc, ac, self._data[n] = f.render(t, d)
for c, v in lc:
if _last[c] < v:
_last[c] = v
for guid, filename, *_ in ac:
if guid in running_ap:
continue
running_ap.add(guid)
nap = mpv.MPV()
nap.pause = True
nap.play(filename)
next_ap.append(nap)
ap.append(nap)
self._last = _last
self._update()
if not self._running:
## We're done, clean up
for a in ap:
a.pause = True
del a
self._last = {c: 0 for c in self._channels}
self._current = 0
self._update()
if self._callback is not None:
self._callback(0, self._values)
self._run_thread = None
break
## END locked block
time.sleep(max(0, next_t - time.monotonic()))
def advance(self, *args):
with self._lock:
if self._run_thread is None:
raise ValueError("Not running")
for a in args:
if isinstance(a, int):
p = None
else:
a, p = a
f = self._functions[a]
t = int(1000*self._current)
d = f.advance(t, self._data[a], n=p)
_, _, self._data[a] = f.render(t, d)
def __init__(self, w: Workspace, w_lock: threading.RLock, output, callback=None):
self.output = output
self.w = w
self.w_lock = w_lock
self._lock = threading.RLock()
self._hold = {}
self._channels = frozenset().union(*((c for c in f.channels) for f in w.fixtures.values()))
self._last = {c: 0 for c in self._channels}
self._functions = []
self._data = []
self._current = 0
self._running = False
self._run_thread = None
self._values = {}
self._callback = callback
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