mirror of
https://github.com/cjfranko/NTP-Timeturner.git
synced 2025-11-08 18:32:02 +00:00
updated setup
This commit is contained in:
Chris Frankland-Wright
parent
57b6fc6eeb
commit
057d394567
2 changed files with 80 additions and 122 deletions
29
setup.sh
29
setup.sh
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@ -33,12 +33,7 @@ sudo apt install -y git curl python3 python3-pip build-essential autoconf automa
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# ---------------------------------------------------------
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echo ""
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echo "Step 3: Installing audio libraries and tools..."
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sudo apt install -y alsa-utils ffmpeg \
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portaudio19-dev python3-pyaudio \
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libasound2-dev libjack-jackd2-dev \
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libsndfile-dev \
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python3-numpy python3-matplotlib \
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|| echo "Warning: Some audio dependencies may have failed to install — continuing anyway."
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sudo apt install -y alsa-utils ffmpeg portaudio19-dev python3-pyaudio libasound2-dev libjack-jackd2-dev libsndfile-dev python3-numpy python3-matplotlib || echo "Warning: Some audio dependencies may have failed to install — continuing anyway."
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echo ""
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echo "Installing 'sounddevice' with pip3 (system-wide)..."
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@ -57,10 +52,10 @@ wget -O test_audioinput.py https://raw.githubusercontent.com/cjfranko/NTP-Timetu
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wget -O splash.png https://raw.githubusercontent.com/cjfranko/NTP-Timeturner/master/splash.png
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# ---------------------------------------------------------
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# Step 5: Build and install libltc (needed by ltc-tools)
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# Step 5: Build and install libltc (the heart of our time-magic)
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# ---------------------------------------------------------
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echo ""
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echo "Step 5: Building libltc (the heart of our time-magic)..."
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echo "Step 5: Building libltc..."
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cd ~
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if [ ! -d "libltc" ]; then
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echo "Cloning libltc from GitHub..."
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@ -84,19 +79,19 @@ sudo make install
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sudo ldconfig
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# ---------------------------------------------------------
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# Step 6: Build and install ltc-tools
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# Step 6: Clone and build custom ltc-tools (with ltcstream)
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# ---------------------------------------------------------
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echo ""
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echo "Step 6: Building ltc-tools (with a gentle nudge)..."
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echo "Step 6: Building custom ltc-tools (ltc-tools-timeturner)..."
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cd ~
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if [ ! -d "ltc-tools" ]; then
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echo "Cloning ltc-tools from GitHub..."
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git clone https://github.com/x42/ltc-tools.git
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if [ ! -d "ltc-tools-timeturner" ]; then
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echo "Cloning your custom ltc-tools fork..."
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git clone https://github.com/cjfranko/ltc-tools-timeturner.git
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fi
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cd ltc-tools
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cd ltc-tools-timeturner
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echo "Compiling ltc-tools (bypassing package check)..."
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make HAVE_LIBLTC=true
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echo "Compiling ltc-tools and ltcstream..."
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make HAVE_LIBLTC=true LOADLIBES="-lasound"
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echo "Installing ltc-tools..."
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sudo make install
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@ -119,7 +114,7 @@ fi
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# Step 8: Make Python scripts executable
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# ---------------------------------------------------------
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echo ""
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echo "Step 8: Making *.py scripts executable (if any)..."
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echo "Step 8: Making *.py scripts executable..."
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shopt -s nullglob
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PYFILES=(/home/hermione/*.py)
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if [ ${#PYFILES[@]} -gt 0 ]; then
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177
timeturner.py
177
timeturner.py
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@ -1,120 +1,83 @@
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#!/usr/bin/env python3
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import curses
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import subprocess
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import numpy as np
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import sounddevice as sd
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import scipy.signal as signal
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import matplotlib.pyplot as plt
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import time
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import shutil
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import fcntl
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import os
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import errno
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from datetime import datetime
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MAX_LOG_LINES = 5
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# --- Configuration ---
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SAMPLE_RATE = 48000
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CUTOFF_FREQ = 1000.0
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BLOCK_SIZE = 2048
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SYNC_WORD = "0011111111111101"
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def set_nonblocking(fileobj):
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fd = fileobj.fileno()
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flags = fcntl.fcntl(fd, fcntl.F_GETFL)
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fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
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# --- Filtering ---
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def highpass_filter(data, cutoff=CUTOFF_FREQ, fs=SAMPLE_RATE, order=5):
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nyq = 0.5 * fs
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normal_cutoff = cutoff / nyq
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b, a = signal.butter(order, normal_cutoff, btype='high', analog=False)
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return signal.lfilter(b, a, data)
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def nonblocking_readline(output):
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try:
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return output.readline()
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except IOError as e:
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if e.errno == errno.EAGAIN:
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return ""
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else:
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raise
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# --- Edge Detection ---
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def detect_edges(data):
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return np.where(np.diff(np.signbit(data)))[0]
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def frame_to_int(line):
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try:
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return int(line.strip().split(":")[-1])
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except Exception:
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return None
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# --- Pulse Width to Bitstream ---
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def classify_bits(edges, fs):
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durations = np.diff(edges) / fs
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threshold = np.median(durations) * 1.2
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bits = ['1' if dur < threshold else '0' for dur in durations]
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return bits, durations, threshold
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def start_ltc_stream(log_lines):
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try:
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ffmpeg = subprocess.Popen(
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["ffmpeg", "-f", "alsa", "-i", "default", "-ac", "1", "-ar", "48000", "-f", "s16le", "-"],
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stdout=subprocess.PIPE,
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stderr=subprocess.DEVNULL
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)
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ltcdump = subprocess.Popen(
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["ltcdump", "-f", "-"],
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stdin=ffmpeg.stdout,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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text=True
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)
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ffmpeg.stdout.close()
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set_nonblocking(ltcdump.stdout)
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set_nonblocking(ltcdump.stderr)
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log_lines.append(f"[{datetime.now().strftime('%H:%M:%S')}] ✅ Subprocesses started successfully")
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return ffmpeg, ltcdump
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except Exception as e:
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log_lines.append(f"[{datetime.now().strftime('%H:%M:%S')}] ❌ Failed to start subprocesses: {e}")
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# --- LTC Sync & Decode ---
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def extract_ltc_frame(bitstream):
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bits = ''.join(bitstream)
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idx = bits.find(SYNC_WORD)
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if idx != -1 and idx + 80 <= len(bits):
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return bits[idx:idx+80], idx
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return None, None
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def main(stdscr):
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curses.curs_set(0)
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stdscr.nodelay(True)
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def decode_timecode(bits):
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def bcd(b): return int(b[0:4], 2) + 10 * int(b[4:8], 2)
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frames = bcd(bits[0:8])
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seconds = bcd(bits[16:24])
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minutes = bcd(bits[32:40])
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hours = bcd(bits[48:56])
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return f"{hours:02}:{minutes:02}:{seconds:02}:{frames:02}"
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log_lines = []
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ffmpeg_proc, ltcdump_proc = start_ltc_stream(log_lines)
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# --- Stream Callback ---
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def process(indata, frames, time_info, status):
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audio = indata[:, 0]
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filtered = highpass_filter(audio)
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last_tc = "⌛ Waiting for LTC..."
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last_frame = None
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fail_count = 0
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peak_db = 20 * np.log10(np.max(np.abs(filtered)) + 1e-6)
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print(f"🎚️ Input Level: {peak_db:.2f} dB")
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while True:
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# Check for subprocess failure
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if ffmpeg_proc and ffmpeg_proc.poll() is not None:
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log_lines.append(f"[{datetime.now().strftime('%H:%M:%S')}] ❌ ffmpeg exited (code {ffmpeg_proc.returncode})")
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ffmpeg_proc = None
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if ltcdump_proc and ltcdump_proc.poll() is not None:
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err_output = ltcdump_proc.stderr.read().strip()
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log_lines.append(f"[{datetime.now().strftime('%H:%M:%S')}] ❌ ltcdump exited (code {ltcdump_proc.returncode})")
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if err_output:
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log_lines.append(err_output.splitlines()[-1])
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ltcdump_proc = None
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edges = detect_edges(filtered)
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print(f"📎 Found {len(edges)} edges.")
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if len(edges) < 10:
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return
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bits, durations, threshold = classify_bits(edges, SAMPLE_RATE)
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print(f"📊 Avg pulse width: {np.mean(durations):.5f} sec")
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print(f"📊 Min: {np.min(durations):.5f}, Max: {np.max(durations):.5f}")
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print(f"🔧 Adaptive threshold: {threshold:.5f} sec")
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print(f"🧮 Extracted {len(bits)} bits.")
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print(f"🧾 Bitstream (first 80 bits):\n{''.join(bits[:80])}")
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frame, idx = extract_ltc_frame(bits)
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if frame:
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print(f"🔓 Sync word found at bit {idx}")
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print(f"✅ LTC Timecode: {decode_timecode(frame)}")
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else:
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print(f"⚠️ No valid LTC frame detected.")
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# --- Main ---
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print("🔊 Starting real-time audio stream...")
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# Read LTC line if possible
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if ltcdump_proc:
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try:
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line = nonblocking_readline(ltcdump_proc.stdout).strip()
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if line and line[0].isdigit():
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current_frame = frame_to_int(line)
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if last_frame is not None and current_frame is not None:
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delta = abs(current_frame - last_frame)
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if delta > 3:
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log_lines.append(f"[{datetime.now().strftime('%H:%M:%S')}] ⚠️ Timecode jump: Δ{delta} frames")
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last_tc = line
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last_frame = current_frame
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elif line:
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fail_count += 1
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except Exception as e:
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log_lines.append(f"[{datetime.now().strftime('%H:%M:%S')}] ⚠️ Read error: {e}")
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fail_count += 1
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log_lines = log_lines[-MAX_LOG_LINES:]
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# Draw UI
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stdscr.clear()
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stdscr.addstr(1, 2, "🌀 NTP Timeturner Status")
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stdscr.addstr(3, 4, "Streaming LTC from default input..." if ltcdump_proc else "⚠️ LTC decoder inactive")
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stdscr.addstr(5, 6, f"🕰️ LTC Timecode: {last_tc}")
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stdscr.addstr(6, 6, f"❌ Decode Failures: {fail_count}")
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stdscr.addstr(8, 4, "📜 Logs:")
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for i, log in enumerate(log_lines):
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stdscr.addstr(9 + i, 6, log[:curses.COLS - 8])
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stdscr.refresh()
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time.sleep(1)
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if __name__ == "__main__":
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if not shutil.which("ltcdump") or not shutil.which("ffmpeg"):
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print("❌ Required tools not found (ltcdump or ffmpeg). Install and retry.")
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exit(1)
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curses.wrapper(main)
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with sd.InputStream(callback=process, channels=1, samplerate=SAMPLE_RATE, blocksize=BLOCK_SIZE):
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while True:
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time.sleep(0.5)
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except KeyboardInterrupt:
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print("🛑 Stopped by user.")
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