#!/bin/bash
# ROADMAP P6a: ask the machine's own MSM6258V which decoder it is.
#
#   tools/bench/adpcm_run.sh
#
# WHAT A GREEN RUN MEANS: 68000 code programmed HD63450 channel 3 exactly as the
# IPL ROM programs it -- dual address, 8-bit port, cycle steal, EXTERNAL request
# -- fed the chip a designed nibble stream at the chip's own pace, and exactly
# ONE of sixteen candidate decoder models reproduces MAME's capture of the
# result SAMPLE-EXACT, with every one of the four axes shown to matter.
#
# WHAT IT DOES NOT MEAN: anything about an MSM6258.  This is MAME's device model
# measured end to end through the machine's real transport.  It settles the RIG.
# The silicon stays on the hardware list.
set -e
cd "$(dirname "$0")/../.."

tools/vasm/vasmm68k_mot -Fbin -o tmp/adpcmgate.bin src/player/adpcmgate.s > /dev/null
python3 tools/bench/prep_adpcm.py

# -samplerate 15625 is not a preference: it is the chip's own stream rate
# (8 MHz / 512), and equal rates are what keep MAME's resampler from filtering
# the thing being measured.  The first cut of this ran at the default 48000 and
# every reconstructed sample arrived as an interpolated pair.
( cd tmp && SDL_VIDEODRIVER=dummy stdbuf -oL timeout -k 5 300 \
    mame x68000 -bios ipl10 -ramsize 2M -video soft -window \
    -samplerate 15625 -wavwrite adpcm.wav -nothrottle -plugins \
    -autoboot_script ../tools/bench/adpcm.lua \
    -seconds_to_run 12 > adpcm_run.log 2>&1 )
grep -aq "^\[ADP\] done" tmp/adpcm_run.log || {
  echo "FAIL: the ADPCM gate did not finish -- no completion marker."
  tail -8 tmp/adpcm_run.log; exit 1; }
grep -a "^\[ADP\]" tmp/adpcm_run.log | sed 's/^\[ADP\] /  /'

fail() { echo "FAIL: $1"; exit 1; }
if grep -aq "^\[ADP\] ERROR" tmp/adpcm_run.log; then
  fail "the channel reported an error or the gate timed out -- see CSR/CER above."
fi
grep -aq "bit7 clear = playing" tmp/adpcm_run.log || \
  fail "the chip never reported itself playing."
# THE FEED RATE IS A GATE, not a note.  The chip is the pacemaker: one byte per
# #DRQ3 and #DRQ3 at half the sample rate.  If the bytes went out at some other
# rate then the channel was NOT being paced by the device, and every sample
# below is of a stream that arrived faster or slower than it was consumed --
# which is precisely the failure session 33 hit from Lua.
RATE=$(sed -n 's/.*= \([0-9.]*\) B\/s .*/\1/p' tmp/adpcm_run.log | head -1)
python3 - "$RATE" <<'PY' || fail "the feed was not paced by the chip (see above)."
import sys
r = float(sys.argv[1])
want = 7812.5
print(f"  feed rate {r:,.1f} B/s against the chip's own {want:,.1f} B/s "
      f"({100*(r-want)/want:+.2f}%)")
sys.exit(0 if abs(r - want) / want < 0.02 else 1)
PY

python3 tools/bench/verify_adpcm_chip.py tmp/adpcm.wav tmp/adpcm_seq.json