ref: 2c4de3dc497a89027aed78548436e64c3631499e
dir: /assets/decode_music.py/
import hashlib
import array
import heapq, sys
import yaml
import time
import util, brr_tools
def load_sound_bank(rom, ea, mem_in = None):
memory = list(mem_in) if mem_in else [None]*65536
j =0
while True:
numbytes = rom.get_word(ea)
target = rom.get_word(ea+2)
if numbytes==0:
# print('Entry point = 0x%x' % target)
return memory, target
print('# Copy %d bytes to 0x%x' % (numbytes, target))
ea += 4
for i in range(numbytes):
memory[target+i] = rom.get_byte(ea)
ea += 1
if (ea & 0xffff) < 0x8000:
ea += 0x8000
j += 1
if j > 256:
break
def get_byte(ea):
return memory[ea]
def get_word(ea):
return get_byte(ea) | get_byte(ea + 1) * 256
# lightworld
# Copy 11694 bytes to 0xd000
# Copy 1672 bytes to 0x2b00
# indoor
# Copy 11455 bytes to 0xd000
# Copy 1292 bytes to 0x2b00
def to_str(s):
if isinstance(s, str):
return s
if isinstance(s, int):
return str(s)
return s.name
class Song:
name = 'Song'
def __str__(self):
s = '# Song index %d\n' % self.index
s += '[Song_0x%x]\n' % (self.ea)
s += "".join(x.name + '\n' for x in self.phrases)
return s
class SongList:
name = 'SongList'
def __str__(self):
s = '[SongList_0x%x]\n' % (self.ea)
s += "".join(('None' if x == None else x.name) + '\n' for x in self.songs)
return s
class Phrase:
name = 'Phrase'
def __str__(self):
s = '[Phrase_0x%x]\n' % (self.ea)
s += "".join(('None' if x == None else x.name) + '\n' for x in self.patterns)
return s
class Pattern:
name = 'Pattern'
def __str__(self):
r = '[Pattern_0x%x]\n' % (self.ea)
last_len = None
for a in self.lines:
s = ''
if len(a) == 4:
s += a[0] + " " + " ".join(map(to_str, a[1]))
else:
s += '%s' % (a[0])
if a[-2] != None:
s += ' %2d' % a[-2]
last_len = a[-2]
else:
s += ' --'# % last_len
if a[-1] != None:
s += ' %2x' % a[-1]
else:
s += ' --'
r += s + '\n'
return r
class PhraseLoop:
name = 'PhraseLoop'
def __init__(self, loops, jmp):
self.loops = loops
self.jmp = jmp
self.name = 'PhraseLoop %d %d' % (self.loops, self.jmp)
def __str__(self):
return self.name
types_for_ea = {}
pqueue_by_ea = []
def reset_queues():
global types_for_ea, pqueue_by_ea
types_for_ea = {}
pqueue_by_ea = []
def get_type_for_ea(ea, tp):
if ea == 0:
return None
assert(ea >= 256), ea
a = types_for_ea.get(ea)
if a != None:
assert type(a)==tp, (type(a), tp, '0x%x' % ea)
return a
a = tp()
a.ea = ea
a.name = '%s_0x%x' % (a.name, ea)
types_for_ea[ea] = a
if get_byte(ea) != None:
heapq.heappush(pqueue_by_ea, (ea, a))
a.is_imported = False
else:
a.is_imported = True
return a
kEffectByteLength = [1, 1, 2, 3, 0, 1, 2, 1, 2, 1, 1, 3, 0, 1, 2, 3, 1, 3, 3, 0, 1, 3, 0, 3, 3, 3, 1]
kEffectNames = ['Instrument', 'Pan', 'PanFade', 'Vibrato', 'VibratoOff',
'SongVolume', 'SongVolumeFade', 'Tempo', 'TempoFade',
'Transpose', 'ChannelTranpose', 'Tremolo', 'TremoloOff',
'Volume', 'VolumeFade', 'Call', 'VibratoFade',
'PitchEnvelopeTo', 'PitchEnvelopeFrom', 'PitchEnvelopeOff',
'FineTune', 'EchoEnable', 'EchoOff', 'EchoSetup', 'EchoVolumeFade',
'PitchSlide', 'PercussionDefine']
assert(len(kEffectNames) == 27)
def note_to_str(note):
kKeys = ['C-', 'C#', 'D-', 'D#', 'E-', 'F-', 'F#', 'G-', 'G#', 'A-', 'A#', 'B-']
if note >= 72:
if note == 72:
return '-+-' # don't write kof
elif note == 73:
return '---' # want kof
else:
assert 0
octave = note / 12
key = note % 12
return '%s%d' % (kKeys[key], octave + 1)
def get_pattern(ea):
if ea == 0:
return None
pattern = get_type_for_ea(ea, Pattern)
return pattern
def get_song(ea, index):
song = get_type_for_ea(ea, Song)
if song:
song.index = index
return song
def get_phrase(ea):
phrase = get_type_for_ea(ea, Phrase)
return phrase
def decode_pattern(pattern, next_ea):
ea = pattern.ea
pattern.lines = []
start_ea = ea
while True:
# print('0x%x 0x%x' % (ea, start_ea))
# assert ea != 0x28f0
if ea != start_ea and ea == next_ea:
pattern.lines.append(('Fallthrough', (), None, None))
return
note_length, volstuff = None, None
cmd = get_byte(ea); ea += 1
if cmd == 0:
break
if not (cmd & 0x80):
note_length = cmd
cmd = get_byte(ea); ea += 1
if not (cmd & 0x80):
volstuff = cmd
cmd = get_byte(ea); ea += 1
if cmd == 0xef:
addr = get_word(ea)
loops = get_byte(ea + 2)
ea += 3
pattern.lines.append((kEffectNames[cmd-0xe0], (get_pattern(addr), loops), note_length, volstuff))
elif cmd >= 0xe0:
assert note_length == None and volstuff == None, (note_length, volstuff)
x = kEffectByteLength[cmd - 0xe0]
args = [get_byte(ea+i) for i in range(x)]
ea += x
pattern.lines.append((kEffectNames[cmd-0xe0], args, note_length, volstuff))
else:
assert(cmd & 0x80)
pattern.lines.append((note_to_str(cmd & 0x7f), note_length, volstuff))
return pattern
def decode_phrase(phrase):
phrase.patterns = [get_pattern(get_word(phrase.ea + i * 2)) for i in range(8)]
def decode_song(song):
ea = song.ea
song.phrases = []
ea_org = ea
eas_in_phrase = []
while True:
eas_in_phrase.append(ea)
phrase = get_word(ea)
if phrase == 0:
break
if phrase < 0x100:
assert phrase != 0x80 and phrase != 0x81
tgt = get_word(ea + 2)
assert tgt in eas_in_phrase
song.phrases.append(PhraseLoop(phrase, (tgt - ea) // 2))
ea += 4
else:
song.phrases.append(get_phrase(phrase))
ea += 2
return song
def decode_any(what, next_ea):
if isinstance(what, Song):
decode_song(what)
elif isinstance(what, SongList):
pass # no need
elif isinstance(what, Phrase):
decode_phrase(what)
elif isinstance(what, Pattern):
decode_pattern(what, next_ea)
else:
assert 0
def get_song_list(ea, num):
song_list = get_type_for_ea(ea, SongList)
song_list.songs = [get_song(get_word(ea + i * 2), i) for i in range(num)]
def load_song(ROM, song):
global memory, SONGS_IN_BANK
reset_queues()
if song == 'intro':
memory, entry_point = load_sound_bank(ROM, 0x998000) # intro
SONGS_IN_BANK = (get_word(0xd000) - 0xd000) // 2
elif song == 'lightworld':
memory, entry_point = load_sound_bank(ROM, 0x9a9ef5) # lw
SONGS_IN_BANK = (get_word(0xd000) - 0xd000) // 2
elif song == 'indoor':
memory, entry_point = load_sound_bank(ROM, 0x9b8000) # indoor
SONGS_IN_BANK = (0xd046 - 0xd000) // 2
elif song == 'ending':
memory, entry_point = load_sound_bank(ROM, 0x9ad380) # ending
SONGS_IN_BANK = (0xd046 - 0xd000) // 2
def print_song(song, f):
get_song_list(0xd000, SONGS_IN_BANK)
if song in ('intro', 'lightworld'):
get_phrase(0xD878)
get_phrase(0xD8A8)
get_phrase(0xD8B8)
get_phrase(0xDf11)
get_phrase(0xe37c)
if song == 'indoor':
get_phrase(0xDc5e)
get_phrase(0xDc6e)
get_pattern(0xe905)
get_phrase(0xe94a)
if song == 'ending':
get_phrase(0x2a10)
while len(pqueue_by_ea):
_, item = heapq.heappop(pqueue_by_ea)
decode_any(item, pqueue_by_ea[0][0] if len(pqueue_by_ea) else None)
for a, b in sorted(types_for_ea.items()):
if not b.is_imported:
print(b, file = f)
def dump_brr_audio():
def decode_brr(snd):
start, loop_start = get_word(0x3c00 + snd * 4), get_word(0x3c00 + snd * 4 + 2)
r = brr_tools.decode_brr(lambda x: get_byte(start+x))
return r, [get_byte(start+x) for x in range(len(r)//16 * 9)], get_byte(start)&0x2 != 0
for audio_idx in range(25):
sound_data, brr_data, brr_repeat = decode_brr(audio_idx)
open('sound/sound%d.pcm.brr' % audio_idx, 'wb').write(bytes(brr_data))
open('sound/sound%d.pcm' % audio_idx, 'wb').write(sound_data)
def dump_music_info():
music_info = {}
kDupSamples = {10 : 9, 20 : 19}
music_info['samples'] = []
for audio_idx in range(25):
start, rep = get_word(0x3c00 + audio_idx * 4), get_word(0x3c00 + audio_idx * 4 + 2)
sample_info = {
'file' : 'sound/sound%d.pcm' % kDupSamples.get(audio_idx, audio_idx)
}
if get_byte(start) & 2:
sample_info['repeat'] = (rep - start) // 9 * 16
music_info['samples'].append(sample_info)
def add_sustain_decay_etc(ea, info):
adsr1, adsr2, gain = get_byte(ea), get_byte(ea + 1), get_byte(ea + 2)
info['decay'] = (adsr1 >> 4) & 7
info['attack'] = adsr1 & 0xf
info['sustain_level'] = adsr2 >> 5
info['sustain_rate'] = adsr2 & 0x1f
info['vxgain'] = gain
music_info['instruments'] = []
for i in range(25):
ea = 0x3d00 + i * 6
adsr1, adsr2 = get_byte(ea + 1), get_byte(ea + 2)
info = {
'sample' : get_byte(ea),
}
add_sustain_decay_etc(ea + 1, info)
info['pitch_base'] = get_byte(ea + 4) << 8 | get_byte(ea + 5)
music_info['instruments'].append(info)
music_info['note_gate_off'] = [get_byte(i) for i in range(0x3D96, 0x3D96 + 8)]
music_info['note_volume'] = [get_byte(i) for i in range(0x3D9E, 0x3D9E + 16)]
music_info['sfx_instruments'] = []
for i in range(25):
ea = 0x3e00 + i * 9
info = {
'voll' : get_byte(ea),
'volr' : get_byte(ea + 1),
'pitch' : get_word(ea + 2),
'sample' : get_byte(ea + 4)
}
add_sustain_decay_etc(ea + 5, info)
info['pitch_base'] = get_byte(ea + 8)
music_info['sfx_instruments'].append(info)
s = yaml.dump(music_info, default_flow_style=None, sort_keys=False)
open('music_info.yaml', 'w').write(s)
def decode_sfx(ea, next_addr):
r = []
while True:
if ea == next_addr:
r.append(('Fallthrough', ))
return r
b = get_byte(ea); ea += 1
if b == 0:
return r
note_length = None
volume_left, volume_right = None, None
if not (b & 0x80):
note_length = b
b = get_byte(ea); ea += 1
if not (b & 0x80):
volume_left, volume_right = b, None
b = get_byte(ea); ea += 1
if not b & 0x80:
volume_right = b
b = get_byte(ea); ea += 1
if b == 0xe0:
assert note_length == None and volume_left == None and volume_right == None, ea
b = get_byte(ea); ea += 1
r.append(('SetInstrument %d' % b, ))
elif b == 0xf9:
#assert note_length == None and volume_left == None and volume_right == None, ea
b = get_byte(ea); ea += 1
b0, b1, b2 = get_byte(ea), get_byte(ea+1), get_byte(ea+2); ea += 3
r.append(('PitchSlide %d %d %d' % (b0, b1, b2), note_to_str(b & 0x7f), note_length, volume_left, volume_right))
elif b == 0xf1:
#assert note_length == None and volume_left == None and volume_right == None, ea
b0, b1, b2 = get_byte(ea), get_byte(ea+1), get_byte(ea+2); ea += 3
r.append(('PitchSlide %d %d %d' % (b0, b1, b2), None, note_length, volume_left, volume_right))
elif b == 0xff:
assert note_length == None and volume_left == None and volume_right == None, ea
r.append(('Restart',))
return r
else:
r.append((None, note_to_str(b & 0x7f), note_length, volume_left, volume_right))
def print_all_sfx(f):
items = set()
def add_sfx_top(base, num, name):
print('[%s_0x%x]' % (name, base), file = f)
next_ea = base + num * 2
echo_ea = next_ea + num
for i in range(num):
r = []
ea = get_word(base + i * 2)
if ea == 0:
t = 'None'
else:
items.add(ea)
t = 'Sfx_0x%x' % ea
if name == 'SfxPort1':
print('%s,%d' % (t, get_byte(next_ea + i)), file = f)
else:
print('%s,%d,%d' % (t, get_byte(next_ea + i), get_byte(echo_ea + i)), file = f)
print(file = f)
add_sfx_top(0x17c0, 32, 'SfxPort1')
add_sfx_top(0x1820, 63, 'SfxPort2')
add_sfx_top(0x191c, 63, 'SfxPort3')
items.add(0x1a5b)
items.add(0x1d1c)
items.add(0x1ee2)
items.add(0x1f13)
items.add(0x1f1c)
items.add(0x252d)
items.add(0x2533)
items.add(0x26a2)
items.add(0x277e)
items.add(0x279d)
items.add(0x27c9)
items.add(0x27f6)
items.add(0x2807)
items.add(0x2818)
items.add(0x2829)
items.add(0x2831)
items.add(0x284a)
items = sorted(list(items))
for i in range(len(items)):
print('[Sfx_0x%x]' % items[i], file = f)
next_addr = items[i + 1] if i + 1 < len(items) else 0
rs = decode_sfx(items[i], next_addr)
for r in rs:
if len(r) == 5:
aa = '. ' if r[1] == None else r[1]
bb = '--' if r[2] == None else '%2d' % r[2]
cc = '---' if r[3] == None else '%3d' % r[3]
dd = '---' if r[4] == None else '%3d' % r[4]
r0 = '' if r[0] == None else ' ' + r[0]
print('%s %s %s %s%s' % (aa, bb, cc, dd, r0), file = f)
else:
print(r[0], file = f)
print(file = f)
def extract_sound_data(rom):
load_song(rom, 'intro')
print_song('intro', open('sound_intro.txt', 'w'))
dump_brr_audio()
dump_music_info()
print_all_sfx(open('sfx.txt', 'w'))
load_song(rom, 'indoor')
print_song('indoor', open('sound_indoor.txt', 'w'))
load_song(rom, 'ending')
print_song('ending', open('sound_ending.txt', 'w'))
if __name__ == "__main__":
ROM = util.LoadedRom(sys.argv[1])
song = sys.argv[2]
load_song(ROM, song)
print_song(song, sys.stdout)