"""At any fixed delivery ceiling and ~52% mean utilisation, the mean is not the
risk -- the peaks are. Measure per-frame peak-to-mean, then check whether the
leaky-bucket rate controller actually holds the ceiling."""
import sys; sys.path.insert(0,'tools/encoder')
import vq_hybrid as H, ratectl as RC, numpy as np
S=sys.argv[1]
BW=4_000_000/8/1024
print(f"ceiling {BW:.0f} KB/s (4 Mbps), audio {RC.AUDIO_KBPS} KB/s\n")
print(f'{"scene":8}{"lam":>5}{"mean":>8}{"p90":>8}{"MAX":>8}{"pk/mean":>9}{"MAX % of pipe":>15}',flush=True)
for s in ['00010','00020','00146','00181']:
    m=H.build(f'{S}/fr_{s}',k1=256,k4=256,iters=16)
    for lam in [60.,10.]:
        e=H.encode(m,lam=lam)
        kb=e['sizes']*12/1024          # per-frame instantaneous KB/s
        tot=kb+RC.AUDIO_KBPS
        print(f'{s:8}{lam:5.0f}{tot.mean():8.1f}{np.percentile(tot,90):8.1f}'
              f'{tot.max():8.1f}{tot.max()/tot.mean():9.2f}{tot.max()/BW*100:14.1f}%'
              + ('  OVER' if tot.max()>BW else ''),flush=True)