Integra calibrazione RGB nel plasmoide e ripristina backend funzionante

This commit is contained in:
enne2
2026-11-01 15:43:28 +01:00
parent 72c7141ecd
commit 344e3c8764
9 changed files with 250 additions and 260 deletions
-205
View File
@@ -10,10 +10,6 @@ CACHE_DIR = os.path.expanduser("~/.cache/ambilight")
PORTAL = "org.freedesktop.portal.Desktop"
PPATH = "/org/freedesktop/portal/desktop"
# Sessione ScreenCast attiva: va CHIUSA esplicitamente, altrimenti il portal continua
# a considerarla viva e lascia nel vassoio l'indicatore "Trasmissione dello schermo".
_ACTIVE = {"bus": None, "session": None}
def screencast_stream(cache_dir=CACHE_DIR):
"""Negozia la condivisione del monitor; ritorna (node_id, width, height)."""
@@ -68,30 +64,9 @@ def screencast_stream(cache_dir=CACHE_DIR):
os.makedirs(cache_dir, exist_ok=True)
with open(token_file, "w") as f:
f.write(str(res["restore_token"]))
_ACTIVE["bus"] = bus
_ACTIVE["session"] = session
return node, size[0], size[1]
def close_stream():
"""Chiude la sessione ScreenCast e la connessione D-Bus (rimuove l'indicatore)."""
session, bus = _ACTIVE.get("session"), _ACTIVE.get("bus")
_ACTIVE["bus"] = _ACTIVE["session"] = None
if not session:
return
try:
import dbus
iface = dbus.Interface(bus.get_object(PORTAL, session), "org.freedesktop.portal.Session")
iface.Close()
except Exception:
pass
try:
bus.close()
except Exception:
pass
class Capture:
"""Pipeline GStreamer ridotta a (led*sub) x gh pixel RGB, pronta per il calcolo zone."""
@@ -138,183 +113,3 @@ class Capture:
if len(data) < need:
return None
return np.frombuffer(data, dtype=np.uint8).reshape(self.gh, self.gw, 3)
# ------------------------------------------------------------------ kmsgrab
FFMPEG_CAP = "/usr/local/libexec/ambilight/ffmpeg-kmsgrab"
FFMPEG_SYS = "/usr/bin/ffmpeg"
class KmsgrabCapture:
"""Cattura DRM diretta (ffmpeg -f kmsgrab) senza portal e senza indicatore.
Richiede CAP_SYS_ADMIN sul binario ffmpeg di appoggio (FFMPEG_CAP), oppure root.
ffmpeg riduce il frame a (leds*sub) x rows in RGB e lo scrive su stdout come
rawvideo: leggiamo esattamente un frame per volta.
"""
def __init__(self, leds, sub=4, rows=72, fps=60, device="/dev/dri/card1",
ffmpeg=None):
self.gw = leds * sub
self.gh = rows
self.fps = max(1, int(fps))
self.device = device
ff = ffmpeg or (FFMPEG_CAP if os.path.exists(FFMPEG_CAP) else FFMPEG_SYS)
self.binary = ff
self.frame_bytes = self.gw * self.gh * 3
self.proc = None
self.stderr_path = os.path.join(CACHE_DIR, "kmsgrab.log")
# hwdownload porta il frame in RAM; lo scaling avviene poi in ffmpeg.
self.vf = (f"hwdownload,format=bgr0,"
f"scale={self.gw}:{self.gh}:flags=bilinear,format=rgb24")
self.cmd = [ff, "-hide_banner", "-loglevel", "error", "-nostdin",
"-f", "kmsgrab", "-device", device, "-i", "-",
"-vf", self.vf,
"-r", str(self.fps),
"-f", "rawvideo", "-pix_fmt", "rgb24", "pipe:1"]
def start(self):
import subprocess
os.makedirs(CACHE_DIR, exist_ok=True)
self.err = open(self.stderr_path, "wb")
self.proc = subprocess.Popen(self.cmd, stdout=subprocess.PIPE,
stderr=self.err, bufsize=self.frame_bytes)
return self
def stop(self):
try:
if self.proc is not None:
self.proc.terminate()
try:
self.proc.wait(timeout=2)
except Exception:
self.proc.kill()
finally:
self.proc = None
try:
self.err.close()
except Exception:
pass
def alive(self):
return self.proc is not None and self.proc.poll() is None
def frame(self, timeout_ms=200):
"""Legge un frame completo; None se non arriva entro il timeout."""
import select
import numpy as np
if self.proc is None:
return None
fd = self.proc.stdout
buf = bytearray()
deadline = timeout_ms / 1000.0
while len(buf) < self.frame_bytes:
ready, _, _ = select.select([fd], [], [], deadline)
if not ready:
return None
chunk = fd.read(self.frame_bytes - len(buf))
if not chunk:
return None
buf += chunk
return np.frombuffer(bytes(buf), dtype=np.uint8).reshape(self.gh, self.gw, 3)
def error_text(self):
try:
with open(self.stderr_path, "rb") as f:
return f.read()[-400:].decode("utf-8", "replace").strip()
except Exception:
return ""
# ------------------------------------------------------------------ processo figlio
class ChildCapture:
"""Legge frame RGB grezzi dallo stdout di un processo di cattura separato.
Il figlio (ambicatcher.py per il portal, ffmpeg per kmsgrab) produce:
prima riga -> JSON di intestazione ({"node":..} oppure {"error":..})
poi -> frame da (leds*sub) x rows pixel RGB, senza separatori
Tenere la cattura fuori dal demone isola GStreamer/PipeWire e, per il portal,
fa chiudere la sessione ScreenCast insieme al processo (niente indicatori orfani).
"""
def __init__(self, argv, leds, sub=4, rows=72, expect_header=True):
self.cmd = list(argv)
self.gw = leds * sub
self.gh = rows
self.frame_bytes = self.gw * self.gh * 3
self.expect_header = expect_header
self.header = {}
self.proc = None
self.stderr_path = os.path.join(CACHE_DIR, "catcher.log")
def start(self):
import subprocess
os.makedirs(CACHE_DIR, exist_ok=True)
self.err = open(self.stderr_path, "wb")
self.proc = subprocess.Popen(self.cmd, stdin=subprocess.PIPE,
stdout=subprocess.PIPE, stderr=self.err,
bufsize=0)
if self.expect_header:
line = self.proc.stdout.readline()
if not line:
err = self.error_text()
raise RuntimeError(f"cattura non avviata: {err or 'nessun output'}")
try:
import json
self.header = json.loads(line.decode())
except Exception:
self.header = {"raw": line[:100].decode("utf-8", "replace")}
if "error" in self.header:
raise RuntimeError(self.header["error"])
return self
def stop(self):
try:
if self.proc is not None:
try:
if self.proc.stdin:
self.proc.stdin.close() # il figlio esce e chiude la sessione
except Exception:
pass
try:
self.proc.wait(timeout=3)
except Exception:
self.proc.terminate()
try:
self.proc.wait(timeout=2)
except Exception:
self.proc.kill()
finally:
self.proc = None
try:
self.err.close()
except Exception:
pass
def alive(self):
return self.proc is not None and self.proc.poll() is None
def frame(self, timeout_ms=200):
import select
import numpy as np
if self.proc is None:
return None
fd = self.proc.stdout
buf = bytearray()
deadline = timeout_ms / 1000.0
while len(buf) < self.frame_bytes:
ready, _, _ = select.select([fd], [], [], deadline)
if not ready:
return None
chunk = fd.read(self.frame_bytes - len(buf))
if not chunk:
return None
buf += chunk
return np.frombuffer(bytes(buf), dtype=np.uint8).reshape(self.gh, self.gw, 3)
def error_text(self):
try:
with open(self.stderr_path, "rb") as f:
return f.read()[-400:].decode("utf-8", "replace").strip()
except Exception:
return ""