attempt to read timecode

timeturner.py

@@ -1,108 +1,53 @@
 #!/usr/bin/env python3
 
-"""
-timeturner.py
-NTP Timeturner Core UI
-Displays LTC signal probe info using curses, updated in real-time.
-"""
-
 import curses
-import threading
+import subprocess
 import time
-import numpy as np
-import sounddevice as sd
+import shutil
 
-# --- CONFIGURATION ---
-SAMPLERATE = 48000
-CHANNELS = 1
-PROBE_INTERVAL = 1.0  # seconds
-MIN_EDGES = 1000
+AUDIO_DEVICE = "hw:1"  # Change this if needed
 
-status = {
-    "count": 0,
-    "avg_width_ms": 0.0,
-    "short_pct": 0.0,
-    "long_pct": 0.0,
-    "verdict": "Waiting for signal...",
-}
+def read_ltc():
+    ffmpeg = subprocess.Popen(
+        ["ffmpeg", "-f", "alsa", "-i", AUDIO_DEVICE, "-t", "1", "-f", "s16le", "-ac", "1", "-ar", "48000", "-"],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.DEVNULL
+    )
+    ltcdump = subprocess.Popen(
+        ["ltcdump", "-f", "-"],
+        stdin=ffmpeg.stdout,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.DEVNULL
+    )
+    ffmpeg.stdout.close()
+    output, _ = ltcdump.communicate()
+    lines = output.decode().splitlines()
+    return lines[-1] if lines else "⚠️ No LTC signal"
 
-
-# --- LTC PROBE THREAD ---
-def detect_rising_edges(signal):
-    above_zero = signal > 0
-    edges = np.where(np.logical_and(~above_zero[:-1], above_zero[1:]))[0]
-    return edges
-
-def cluster_durations(durations):
-    if len(durations) < 2:
-        return None, None
-
-    durations = np.array(durations)
-    mean1, mean2 = np.min(durations), np.max(durations)
-
-    for _ in range(10):
-        group1 = durations[np.abs(durations - mean1) < np.abs(durations - mean2)]
-        group2 = durations[np.abs(durations - mean1) >= np.abs(durations - mean2)]
-        if len(group1) == 0 or len(group2) == 0:
-            break
-        mean1 = np.mean(group1)
-        mean2 = np.mean(group2)
-
-    short = group1 if mean1 < mean2 else group2
-    long = group2 if mean1 < mean2 else group1
-    return short, long
-
-def analyze_signal():
-    global status
-    while True:
-        try:
-            audio = sd.rec(int(PROBE_INTERVAL * SAMPLERATE), samplerate=SAMPLERATE,
-                           channels=CHANNELS, dtype='float32')
-            sd.wait()
-            signal = audio.flatten()
-            edges = detect_rising_edges(signal)
-            durations = np.diff(edges) / SAMPLERATE
-            short, long = cluster_durations(durations)
-
-            if short is None or long is None or len(durations) < MIN_EDGES:
-                status["verdict"] = "❌ No signal or not enough pulses"
-                continue
-
-            status.update({
-                "count": len(durations),
-                "avg_width_ms": np.mean(durations) * 1000,
-                "short_pct": (len(short) / len(durations)) * 100,
-                "long_pct": (len(long) / len(durations)) * 100,
-                "verdict": "✅ LTC-like signal detected" if 10 <= (len(short) / len(durations)) * 100 <= 90
-                            else "⚠️ Pulse imbalance — possible noise or non-LTC"
-            })
-        except Exception as e:
-            status["verdict"] = f"⚠️ Audio error: {e}"
-
-# --- CURSES UI ---
-def draw_ui(stdscr):
+def main(stdscr):
     curses.curs_set(0)
     stdscr.nodelay(True)
-    stdscr.timeout(500)
 
     while True:
         stdscr.clear()
-        stdscr.addstr(0, 2, "🕰️  NTP Timeturner - Live LTC Monitor", curses.A_BOLD)
-        stdscr.addstr(2, 4, f"Pulses captured:     {status['count']}")
-        stdscr.addstr(3, 4, f"Avg pulse width:     {status['avg_width_ms']:.2f} ms")
-        stdscr.addstr(4, 4, f"Short pulse ratio:   {status['short_pct']:.1f}%")
-        stdscr.addstr(5, 4, f"Long pulse ratio:    {status['long_pct']:.1f}%")
-        stdscr.addstr(7, 4, f"Status:              {status['verdict']}")
-        stdscr.addstr(9, 4, "Press Ctrl+C to exit.")
-        stdscr.refresh()
+
+        stdscr.addstr(1, 2, "🌀 NTP Timeturner Status")
+        stdscr.addstr(3, 4, "Reading LTC from audio device...")
 
         try:
-            time.sleep(1)
-        except KeyboardInterrupt:
-            break
+            ltc_timecode = read_ltc()
+        except Exception as e:
+            ltc_timecode = f"Error: {e}"
+
+        stdscr.addstr(5, 6, f"🕰️ LTC Timecode: {ltc_timecode}")
+
+        stdscr.refresh()
+        time.sleep(1)
 
-# --- ENTRY POINT ---
 if __name__ == "__main__":
-    probe_thread = threading.Thread(target=analyze_signal, daemon=True)
-    probe_thread.start()
-    curses.wrapper(draw_ui)
+    # Pre-flight checks
+    if not shutil.which("ltcdump") or not shutil.which("ffmpeg"):
+        print("❌ Required tools not found (ltcdump, ffmpeg). Install and retry.")
+        exit(1)
+
+    curses.wrapper(main)