CARLA ? C-Shenron based Simualtor for Sensor data generation.
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import os
import sys
import time
import numpy as np
import json
from pathlib import Path
# Add project root and ISOLATE paths
project_root = Path(__file__).parent.parent
sys.path.append(str(project_root))
sys.path.append(str(project_root / 'scripts' / 'ISOLATE'))
# Import the model wrapper
try:
from scripts.ISOLATE.model_wrapper import ShenronRadarModel
except ImportError as e:
print(f"Error: Failed to import ShenronRadarModel. Ensure scripts/ISOLATE/model_wrapper.py exists. ({e})")
sys.exit(1)
def _get_gpu_info():
"""Retrieve GPU hardware info for telemetry display."""
try:
import torch
if not torch.cuda.is_available():
return {"name": "CPU Fallback", "vram_gb": 0, "backend": "CPU"}
# Try to get device name safely
try:
name = torch.cuda.get_device_name(0)
except:
name = "NVIDIA Device"
# Try to get properties safely
try:
props = torch.cuda.get_device_properties(0)
vram_total = props.total_memory / (1024**3)
except:
vram_total = 0
return {"name": name, "vram_gb": round(vram_total, 1), "backend": "CUDA"}
except Exception as e:
return {"name": f"Detection Error ({type(e).__name__})", "vram_gb": 0, "backend": "Unknown"}
def process_session(session_path):
print(f"\n>>> Processing session: {session_path.name}")
lidar_dir = session_path / "lidar"
if not lidar_dir.exists():
print(f" [SKIP] No 'lidar' folder found.")
return
# Find all .npy files in lidar/
lidar_files = sorted(list(lidar_dir.glob("*.npy")))
if not lidar_files:
print(f" [SKIP] No .npy files in 'lidar' folder.")
return
radar_types = ['awrl1432', 'radarbook']
models = {}
# -----------------------------------------------------------------------
# DIAGNOSTIC: Step 1 - Model Initialization
# -----------------------------------------------------------------------
print(f" [DIAGNOSTIC] Step 1: Initializing models...", flush=True)
for r_type in radar_types:
try:
print(f" - Loading physics weights for {r_type}...", flush=True)
models[r_type] = ShenronRadarModel(radar_type=r_type)
(session_path / r_type).mkdir(exist_ok=True)
# Create Metrology folders
met_base = session_path / r_type / "metrology"
for sub in ["rd", "ra", "cfar"]:
(met_base / sub).mkdir(parents=True, exist_ok=True)
# Save physical axes once per session
np.save(met_base / "range_axis.npy", models[r_type].processor.rangeAxis)
np.save(met_base / "angle_axis.npy", models[r_type].processor.angleAxis)
# Save radar hardware specs for downstream MCAP visualization
radar_hw_specs = {
'f': float(models[r_type].radar_obj.f),
'chirp_rep': float(models[r_type].radar_obj.chirp_rep),
'max_velocity': float((3e8 / models[r_type].radar_obj.f) / (4 * models[r_type].radar_obj.chirp_rep)),
}
with open(met_base / "radar_specs.json", "w") as sf:
json.dump(radar_hw_specs, sf)
except Exception as e:
print(f" [WARNING] Failed to init {r_type}: {e}")
continue
# -----------------------------------------------------------------------
# TELEMETRY: Emit structured init payload
# -----------------------------------------------------------------------
print(f" [DIAGNOSTIC] Step 2: Collecting metadata...", flush=True)
gpu_info = _get_gpu_info()
radar_specs = {}
for r_type, model in models.items():
radar_specs[r_type] = model.get_radar_specs()
telemetry_init = {
"gpu": gpu_info,
"radars": radar_specs,
"total_frames": len(lidar_files),
"session": session_path.name,
}
print(f"[SHENRON_INIT]{json.dumps(telemetry_init)}", flush=True)
# -----------------------------------------------------------------------
# MAIN PROCESSING LOOP
# -----------------------------------------------------------------------
print(f" [DIAGNOSTIC] Step 3: Starting main loop for {len(lidar_files)} frames...", flush=True)
total_frames = len(lidar_files)
frame_times = []
for frame_idx, lidar_file in enumerate(lidar_files):
frame_start = time.time()
# 1. Load Semantic LiDAR data
try:
data = np.load(lidar_file)
except Exception as e:
print(f"\n [ERROR] Failed to load {lidar_file.name}: {e}")
continue
if data.shape[1] == 6:
padded_data = np.zeros((data.shape[0], 7), dtype=np.float32)
padded_data[:, 0:3] = data[:, 0:3]
padded_data[:, 4:7] = data[:, 3:6]
data = padded_data
frame_metrics = {}
for r_type, model in models.items():
# Ensure a folder exists for raw ADC samples
adc_folder = session_path / r_type / "adc_raw"
adc_folder.mkdir(parents=True, exist_ok=True)
try:
# 2. Process through the physics-based model
# print(f" [DEBUG] Processing {r_type} frame {frame_idx+1}...", end='\r', flush=True)
rich_pcd = model.process(data)
# 2. Save raw ADC data (saved by the model in .last_adc)
if hasattr(model, "last_adc") and model.last_adc is not None:
adc_path = session_path / r_type / "adc_raw" / lidar_file.name
np.save(adc_path, model.last_adc)
# 3. Save to disk
output_file = session_path / r_type / lidar_file.name
np.save(output_file, rich_pcd)
# 4. Save Metrology Heatmaps
met_base = session_path / r_type / "metrology"
met = model.get_last_metrology()
if met:
frame_name = lidar_file.stem
ra_map = met['ra_heatmap']
np.save(met_base / "rd" / f"{frame_name}.npy", met['rd_heatmap'])
np.save(met_base / "ra" / f"{frame_name}.npy", ra_map)
np.save(met_base / "cfar" / f"{frame_name}.npy", met['threshold_matrix'])
# --- SANITY CHECK: Azimuth Variance ---
# Detects if RA heatmap is "peaky" (good) vs "rings/flat" (broken phase)
# We use the normalized variance from the model for consistency
pass # Handled by model.get_signal_metrics below
# 5. Save Signal Metrics
try:
metrics = model.get_signal_metrics()
if metrics:
# Clean metrics for JSON (handle NaN/Inf)
clean_metrics = frame_metrics.get(r_type, {})
for k, v in metrics.items():
if isinstance(v, float) and (np.isnan(v) or np.isinf(v)):
clean_metrics[k] = 0.0
else:
clean_metrics[k] = v
metrics_file = met_base / "metrics.jsonl"
with open(metrics_file, "a") as f:
f.write(json.dumps({"frame": lidar_file.stem, **clean_metrics}) + "\n")
# CAPTURE UNIQUE POINT COUNT FOR TELEMETRY
clean_metrics["pts"] = int(rich_pcd.shape[0]) if hasattr(rich_pcd, 'shape') else 0
frame_metrics[r_type] = clean_metrics
except Exception as e:
pass # Metrics failure shouldn't crash the loop
except Exception as e:
print(f"\n [ERROR] Failed to process {lidar_file.name} for {r_type}: {e}")
# Timing
frame_elapsed = time.time() - frame_start
frame_times.append(frame_elapsed)
avg_time = sum(frame_times[-10:]) / len(frame_times[-10:])
remaining = total_frames - (frame_idx + 1)
eta_seconds = remaining * avg_time
eta_str = f"{int(eta_seconds // 60)}m {int(eta_seconds % 60)}s" if eta_seconds > 60 else f"{int(eta_seconds)}s"
progress_pct = int(((frame_idx + 1) / total_frames) * 100)
telemetry_frame = {
"frame": frame_idx + 1,
"total": total_frames,
"pct": progress_pct,
"fps": round(1.0 / frame_elapsed, 2) if frame_elapsed > 0 else 0,
"elapsed": round(frame_elapsed, 2),
"eta": eta_str,
"metrics": {}
}
for r_type, m in frame_metrics.items():
telemetry_frame["metrics"][r_type] = {
"snr": round(m.get("peak_snr_db", 0), 1),
"pts": m.get("pts", 0),
"peak": round(m.get("peak_magnitude", 0), 1),
"bins": m.get("active_bins", 0),
"az_std": round(m.get("azimuth_variance", 0), 4),
"spread": round(m.get("peak_azimuth_spread_deg", 0), 1),
}
print(f"[SHENRON_STEP]{json.dumps(telemetry_frame)}", flush=True)
def main():
data_root = project_root / "data"
if not data_root.exists():
print(f"Error: {data_root} not found.")
return
sessions = sorted([d for d in data_root.iterdir() if d.is_dir()])
if not sessions:
print("No simulation sessions found in data/.")
return
print(f"Found {len(sessions)} sessions.")
for session in sessions:
if (session / "frames.jsonl").exists():
process_session(session)
print("\n" + "="*50)
print("SHENRON BATCH PROCESSING COMPLETE!")
print("="*50)
if __name__ == "__main__":
main()