731 lines
23 KiB
Python
731 lines
23 KiB
Python
#!/usr/bin/env python3
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from collections import namedtuple, defaultdict
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import tempfile
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import subprocess
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import uuid
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import json
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import os
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import re
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import struct
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import sys
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TYPE_CTL = 1
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TYPE_TBL = 2
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class AifcEntry:
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def __init__(self, data, book, loop):
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self.name = None
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self.data = data
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self.book = book
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self.loop = loop
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self.tunings = []
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class SampleBank:
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def __init__(self, name, data, offset):
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self.offset = offset
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self.name = name
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self.data = data
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self.entries = {}
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def add_sample(self, offset, sample_size, book, loop):
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assert sample_size % 2 == 0
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if sample_size % 9 != 0:
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assert sample_size % 9 == 1
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sample_size -= 1
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if offset in self.entries:
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entry = self.entries[offset]
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assert entry.book == book
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assert entry.loop == loop
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assert len(entry.data) == sample_size
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else:
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entry = AifcEntry(self.data[offset : offset + sample_size], book, loop)
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self.entries[offset] = entry
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return entry
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Sound = namedtuple("Sound", ["sample_addr", "tuning"])
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Drum = namedtuple("Drum", ["name", "addr", "release_rate", "pan", "envelope", "sound"])
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Inst = namedtuple(
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"Inst",
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[
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"name",
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"addr",
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"release_rate",
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"normal_range_lo",
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"normal_range_hi",
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"envelope",
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"sound_lo",
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"sound_med",
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"sound_hi",
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],
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)
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Book = namedtuple("Book", ["order", "npredictors", "table"])
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Loop = namedtuple("Loop", ["start", "end", "count", "state"])
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Envelope = namedtuple("Envelope", ["name", "entries"])
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Bank = namedtuple(
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"Bank",
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[
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"name",
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"iso_date",
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"sample_bank",
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"insts",
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"drums",
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"all_insts",
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"inst_list",
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"envelopes",
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"samples",
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],
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)
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def align(val, al):
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return (val + (al - 1)) & -al
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name_tbl = {}
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def gen_name(prefix, name_table=[]):
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if prefix not in name_tbl:
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name_tbl[prefix] = 0
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ind = name_tbl[prefix]
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name_tbl[prefix] += 1
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if ind < len(name_table):
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return name_table[ind]
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return prefix + str(ind)
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def parse_bcd(data):
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ret = 0
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for c in data:
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ret *= 10
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ret += c >> 4
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ret *= 10
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ret += c & 15
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return ret
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def serialize_f80(num):
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num = float(num)
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f64, = struct.unpack(">Q", struct.pack(">d", num))
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f64_sign_bit = f64 & 2 ** 63
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if num == 0.0:
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if f64_sign_bit:
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return b"\x80" + b"\0" * 9
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else:
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return b"\0" * 10
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exponent = (f64 ^ f64_sign_bit) >> 52
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assert exponent != 0, "can't handle denormals"
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assert exponent != 0x7FF, "can't handle infinity/nan"
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exponent -= 1023
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f64_mantissa_bits = f64 & (2 ** 52 - 1)
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f80_sign_bit = f64_sign_bit << (80 - 64)
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f80_exponent = (exponent + 0x3FFF) << 64
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f80_mantissa_bits = 2 ** 63 | (f64_mantissa_bits << (63 - 52))
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f80 = f80_sign_bit | f80_exponent | f80_mantissa_bits
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return struct.pack(">HQ", f80 >> 64, f80 & (2 ** 64 - 1))
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def round_f32(num):
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enc = struct.pack(">f", num)
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for decimals in range(5, 20):
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num2 = round(num, decimals)
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if struct.pack(">f", num2) == enc:
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return num2
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return num
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def parse_sound(data):
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sample_addr, tuning = struct.unpack(">If", data)
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if sample_addr == 0:
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assert tuning == 0
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return None
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return Sound(sample_addr, tuning)
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def parse_drum(data, addr):
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name = gen_name("drum")
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release_rate, pan, loaded, pad = struct.unpack(">BBBB", data[:4])
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assert loaded == 0
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assert pad == 0
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sound = parse_sound(data[4:12])
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env_addr, = struct.unpack(">I", data[12:])
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assert env_addr != 0
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return Drum(name, addr, release_rate, pan, env_addr, sound)
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def parse_inst(data, addr):
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name = gen_name("inst")
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loaded, normal_range_lo, normal_range_hi, release_rate, env_addr = struct.unpack(
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">BBBBI", data[:8]
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)
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assert env_addr != 0
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sound_lo = parse_sound(data[8:16])
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sound_med = parse_sound(data[16:24])
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sound_hi = parse_sound(data[24:])
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if sound_lo is None:
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assert normal_range_lo == 0
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if sound_hi is None:
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assert normal_range_hi == 127
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return Inst(
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name,
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addr,
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release_rate,
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normal_range_lo,
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normal_range_hi,
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env_addr,
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sound_lo,
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sound_med,
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sound_hi,
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)
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def parse_loop(addr, bank_data):
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start, end, count, pad = struct.unpack(">IIiI", bank_data[addr : addr + 16])
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assert pad == 0
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if count != 0:
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state = struct.unpack(">16h", bank_data[addr + 16 : addr + 48])
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else:
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state = None
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return Loop(start, end, count, state)
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def parse_book(addr, bank_data):
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order, npredictors = struct.unpack(">ii", bank_data[addr : addr + 8])
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assert order == 2
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assert npredictors == 2
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table_data = bank_data[addr + 8 : addr + 8 + 16 * order * npredictors]
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table = []
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for i in range(0, 16 * order * npredictors, 2):
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table.append(struct.unpack(">h", table_data[i : i + 2])[0])
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return Book(order, npredictors, table)
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def parse_sample(data, bank_data, sample_bank):
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zero, addr, loop, book, sample_size = struct.unpack(">IIIII", data)
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assert zero == 0
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assert loop != 0
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assert book != 0
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loop = parse_loop(loop, bank_data)
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book = parse_book(book, bank_data)
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return sample_bank.add_sample(addr, sample_size, book, loop)
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def parse_envelope(addr, data_bank):
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entries = []
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while True:
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delay, arg = struct.unpack(">HH", data_bank[addr : addr + 4])
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entries.append((delay, arg))
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addr += 4
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if 1 <= (-delay) % 2 ** 16 <= 3:
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break
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return entries
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def parse_ctl(header, data, sample_bank, index):
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name_tbl.clear()
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name = "{:02X}".format(index)
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num_instruments, num_drums, shared = struct.unpack(">III", header[:12])
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date = parse_bcd(header[12:])
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y = date // 10000
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m = date // 100 % 100
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d = date % 100
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iso_date = "{:02}-{:02}-{:02}".format(y, m, d)
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assert shared in [0, 1]
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# print("{}: {}, {} + {}".format(name, iso_date, num_instruments, num_drums))
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drum_base_addr, = struct.unpack(">I", data[:4])
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drum_addrs = []
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if num_drums != 0:
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assert drum_base_addr != 0
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for i in range(num_drums):
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drum_addr, = struct.unpack(
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">I", data[drum_base_addr + i * 4 : drum_base_addr + i * 4 + 4]
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)
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assert drum_addr != 0
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drum_addrs.append(drum_addr)
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else:
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assert drum_base_addr == 0
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inst_base_addr = 4
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inst_addrs = []
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inst_list = []
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for i in range(num_instruments):
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inst_addr, = struct.unpack(
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">I", data[inst_base_addr + i * 4 : inst_base_addr + i * 4 + 4]
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)
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if inst_addr == 0:
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inst_list.append(None)
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else:
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inst_list.append(inst_addr)
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inst_addrs.append(inst_addr)
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inst_addrs.sort()
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assert drum_addrs == sorted(drum_addrs)
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if drum_addrs and inst_addrs:
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assert max(inst_addrs) < min(drum_addrs)
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assert len(set(inst_addrs)) == len(inst_addrs)
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assert len(set(drum_addrs)) == len(drum_addrs)
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insts = []
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for inst_addr in inst_addrs:
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insts.append(parse_inst(data[inst_addr : inst_addr + 32], inst_addr))
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drums = []
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for drum_addr in drum_addrs:
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drums.append(parse_drum(data[drum_addr : drum_addr + 16], drum_addr))
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env_addrs = set()
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sample_addrs = set()
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tunings = defaultdict(lambda: [])
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for inst in insts:
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for sound in [inst.sound_lo, inst.sound_med, inst.sound_hi]:
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if sound is not None:
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sample_addrs.add(sound.sample_addr)
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tunings[sound.sample_addr].append(sound.tuning)
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env_addrs.add(inst.envelope)
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for drum in drums:
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sample_addrs.add(drum.sound.sample_addr)
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tunings[drum.sound.sample_addr].append(drum.sound.tuning)
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env_addrs.add(drum.envelope)
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# Put drums somewhere in the middle of the instruments to make sample
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# addresses come in increasing order. (This logic isn't totally right,
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# but it works for our purposes.)
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all_insts = []
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need_drums = len(drums) > 0
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for inst in insts:
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if need_drums and any(
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s.sample_addr > drums[0].sound.sample_addr
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for s in [inst.sound_lo, inst.sound_med, inst.sound_hi]
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if s is not None
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):
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all_insts.append(drums)
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need_drums = False
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all_insts.append(inst)
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if need_drums:
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all_insts.append(drums)
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samples = {}
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for addr in sorted(sample_addrs):
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samples[addr] = parse_sample(data[addr : addr + 20], data, sample_bank)
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samples[addr].tunings.extend(tunings[addr])
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env_data = {}
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used_env_addrs = set()
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for addr in sorted(env_addrs):
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env = parse_envelope(addr, data)
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env_data[addr] = env
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for i in range(align(len(env), 4)):
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used_env_addrs.add(addr + i * 4)
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# Unused envelopes
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unused_envs = set()
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if used_env_addrs:
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for addr in range(min(used_env_addrs) + 4, max(used_env_addrs), 4):
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if addr not in used_env_addrs:
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unused_envs.add(addr)
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stub_marker, = struct.unpack(">I", data[addr : addr + 4])
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assert stub_marker == 0
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env = parse_envelope(addr, data)
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env_data[addr] = env
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for i in range(align(len(env), 4)):
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used_env_addrs.add(addr + i * 4)
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envelopes = {}
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for addr in sorted(env_data.keys()):
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env_name = gen_name("envelope")
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if addr in unused_envs:
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env_name += "_unused"
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envelopes[addr] = Envelope(env_name, env_data[addr])
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return Bank(
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name,
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iso_date,
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sample_bank,
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insts,
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drums,
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all_insts,
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inst_list,
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envelopes,
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samples,
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)
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def parse_seqfile(data, filetype):
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magic, num_entries = struct.unpack(">HH", data[:4])
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assert magic == filetype
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prev = align(4 + num_entries * 8, 16)
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entries = []
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for i in range(num_entries):
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offset, length = struct.unpack(">II", data[4 + i * 8 : 4 + i * 8 + 8])
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if filetype == TYPE_CTL:
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assert offset == prev
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else:
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assert offset <= prev
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prev = max(prev, offset + length)
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entries.append((offset, length))
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assert all(x == 0 for x in data[prev:])
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return entries
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def parse_tbl(data, entries):
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seen = {}
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tbls = []
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sample_banks = []
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sample_bank_map = {}
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for (offset, length) in entries:
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if offset not in seen:
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name = gen_name("sample_bank")
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seen[offset] = name
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sample_bank = SampleBank(name, data[offset : offset + length], offset)
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sample_banks.append(sample_bank)
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sample_bank_map[name] = sample_bank
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tbls.append(seen[offset])
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return tbls, sample_banks, sample_bank_map
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class AifcWriter:
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def __init__(self, out):
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self.out = out
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self.sections = []
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self.total_size = 0
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def add_section(self, tp, data):
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assert isinstance(tp, bytes)
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assert isinstance(data, bytes)
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self.sections.append((tp, data))
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self.total_size += align(len(data), 2) + 8
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def add_custom_section(self, tp, data):
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self.add_section(b"APPL", b"stoc" + self.pstring(tp) + data)
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def pstring(self, data):
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return bytes([len(data)]) + data + (b"" if len(data) % 2 else b"\0")
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def finish(self):
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# total_size isn't used, and is regularly wrong. In particular, vadpcm_enc
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# preserves the size of the input file...
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self.total_size += 4
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self.out.write(b"FORM" + struct.pack(">I", self.total_size) + b"AIFC")
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for (tp, data) in self.sections:
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self.out.write(tp + struct.pack(">I", len(data)))
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self.out.write(data)
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if len(data) % 2:
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self.out.write(b"\0")
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def write_aifc(entry, out):
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writer = AifcWriter(out)
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num_channels = 1
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data = entry.data
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assert len(data) % 9 == 0
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if len(data) % 2 == 1:
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data += b"\0"
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# (Computing num_frames this way makes it off by one when the data length
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# is odd. It matches vadpcm_enc, though.)
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num_frames = len(data) * 16 // 9
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sample_size = 16 # bits per sample
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if len(set(entry.tunings)) == 1:
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sample_rate = 32000 * entry.tunings[0]
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else:
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# Some drum sounds in sample bank B don't have unique sample rates, so
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# we have to guess. This doesn't matter for matching, it's just to make
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# the sounds easy to listen to.
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if min(entry.tunings) <= 0.5 <= max(entry.tunings):
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sample_rate = 16000
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elif min(entry.tunings) <= 1.0 <= max(entry.tunings):
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sample_rate = 32000
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elif min(entry.tunings) <= 1.5 <= max(entry.tunings):
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sample_rate = 48000
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elif min(entry.tunings) <= 2.5 <= max(entry.tunings):
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sample_rate = 80000
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else:
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sample_rate = 16000 * (min(entry.tunings) + max(entry.tunings))
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|
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writer.add_section(
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b"COMM",
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struct.pack(">hIh", num_channels, num_frames, sample_size)
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+ serialize_f80(sample_rate)
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+ b"VAPC"
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+ writer.pstring(b"VADPCM ~4-1"),
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)
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writer.add_section(b"INST", b"\0" * 20)
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table_data = b"".join(struct.pack(">h", x) for x in entry.book.table)
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writer.add_custom_section(
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b"VADPCMCODES",
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struct.pack(">hhh", 1, entry.book.order, entry.book.npredictors) + table_data,
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)
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writer.add_section(b"SSND", struct.pack(">II", 0, 0) + data)
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if entry.loop.count != 0:
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writer.add_custom_section(
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b"VADPCMLOOPS",
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struct.pack(
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">HHIIi16h",
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1,
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1,
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entry.loop.start,
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entry.loop.end,
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entry.loop.count,
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*entry.loop.state
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),
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)
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writer.finish()
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def write_aiff(entry, filename):
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with tempfile.NamedTemporaryFile(suffix=".aifc", delete=False) as temp:
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write_aifc(entry, temp)
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temp.flush()
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aifc_decode = os.path.join(os.path.dirname(__file__), "aifc_decode")
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subprocess.run([aifc_decode, temp.name, filename], check=True)
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|
|
|
# Modified from https://stackoverflow.com/a/25935321/1359139, cc by-sa 3.0
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|
class NoIndent(object):
|
|
def __init__(self, value):
|
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self.value = value
|
|
|
|
|
|
class NoIndentEncoder(json.JSONEncoder):
|
|
def __init__(self, *args, **kwargs):
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|
super(NoIndentEncoder, self).__init__(*args, **kwargs)
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|
self._replacement_map = {}
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|
|
|
def default(self, o):
|
|
def ignore_noindent(o):
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|
if isinstance(o, NoIndent):
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|
return o.value
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|
return self.default(o)
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|
|
|
if isinstance(o, NoIndent):
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|
key = uuid.uuid4().hex
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|
self._replacement_map[key] = json.dumps(o.value, default=ignore_noindent)
|
|
return "@@%s@@" % (key,)
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|
else:
|
|
return super(NoIndentEncoder, self).default(o)
|
|
|
|
def encode(self, o):
|
|
result = super(NoIndentEncoder, self).encode(o)
|
|
repl_map = self._replacement_map
|
|
|
|
def repl(m):
|
|
key = m.group()[3:-3]
|
|
return repl_map[key]
|
|
|
|
return re.sub(r"\"@@[0-9a-f]*?@@\"", repl, result)
|
|
|
|
|
|
def inst_ifdef_json(bank_index, inst_index):
|
|
if bank_index == 7 and inst_index >= 13:
|
|
return NoIndent(["VERSION_US", "VERSION_EU"])
|
|
if bank_index == 8 and inst_index >= 16:
|
|
return NoIndent(["VERSION_US", "VERSION_EU"])
|
|
if bank_index == 10 and inst_index >= 14:
|
|
return NoIndent(["VERSION_US", "VERSION_EU"])
|
|
return None
|
|
|
|
|
|
def main():
|
|
args = []
|
|
need_help = False
|
|
only_samples = False
|
|
only_samples_list = []
|
|
for a in sys.argv[1:]:
|
|
if a == "--help" or a == "-h":
|
|
need_help = True
|
|
elif a == "--only-samples":
|
|
only_samples = True
|
|
elif a.startswith("-"):
|
|
print("Unrecognized option " + a)
|
|
sys.exit(1)
|
|
elif only_samples:
|
|
only_samples_list.append(a)
|
|
else:
|
|
args.append(a)
|
|
|
|
expected_num_args = 2 if only_samples else 4
|
|
if need_help or len(args) != expected_num_args:
|
|
print(
|
|
"Usage: {}"
|
|
" <.ctl file> <.tbl file>"
|
|
" (<samples outdir> <sound bank outdir> |"
|
|
" --only-samples file:index ...)".format(sys.argv[0])
|
|
)
|
|
sys.exit(0 if need_help else 1)
|
|
|
|
ctl_data = open(args[0], "rb").read()
|
|
tbl_data = open(args[1], "rb").read()
|
|
|
|
if not only_samples:
|
|
samples_out_dir = args[2]
|
|
banks_out_dir = args[3]
|
|
|
|
ctl_entries = parse_seqfile(ctl_data, TYPE_CTL)
|
|
tbl_entries = parse_seqfile(tbl_data, TYPE_TBL)
|
|
assert len(ctl_entries) == len(tbl_entries)
|
|
|
|
tbls, sample_banks, sample_bank_map = parse_tbl(tbl_data, tbl_entries)
|
|
|
|
banks = []
|
|
for ((offset, length), sample_bank_name, index) in zip(
|
|
ctl_entries, tbls, range(len(ctl_entries))
|
|
):
|
|
sample_bank = sample_bank_map[sample_bank_name]
|
|
entry = ctl_data[offset : offset + length]
|
|
banks.append(parse_ctl(entry[:16], entry[16:], sample_bank, index))
|
|
|
|
# Special mode used for asset extraction: generate aifc files, with paths
|
|
# given by command line arguments
|
|
if only_samples:
|
|
index_to_filename = {}
|
|
created_dirs = set()
|
|
for arg in only_samples_list:
|
|
filename, index = arg.rsplit(":", 1)
|
|
index_to_filename[int(index)] = filename
|
|
index = -1
|
|
for sample_bank in sample_banks:
|
|
offsets = sorted(set(sample_bank.entries.keys()))
|
|
for offset in offsets:
|
|
entry = sample_bank.entries[offset]
|
|
index += 1
|
|
if index in index_to_filename:
|
|
filename = index_to_filename[index]
|
|
dir = os.path.dirname(filename)
|
|
if dir not in created_dirs:
|
|
os.makedirs(dir, exist_ok=True)
|
|
created_dirs.add(dir)
|
|
write_aiff(entry, filename)
|
|
return
|
|
|
|
# Generate aiff files
|
|
for sample_bank in sample_banks:
|
|
dir = os.path.join(samples_out_dir, sample_bank.name)
|
|
os.makedirs(dir, exist_ok=True)
|
|
|
|
offsets = sorted(set(sample_bank.entries.keys()))
|
|
# print(sample_bank.name, len(offsets), 'entries')
|
|
offsets.append(len(sample_bank.data))
|
|
|
|
assert 0 in offsets
|
|
for offset, next_offset, index in zip(
|
|
offsets, offsets[1:], range(len(offsets))
|
|
):
|
|
entry = sample_bank.entries[offset]
|
|
entry.name = "{:02X}".format(index)
|
|
size = next_offset - offset
|
|
assert size % 16 == 0
|
|
assert size - 15 <= len(entry.data) <= size
|
|
garbage = sample_bank.data[offset + len(entry.data) : offset + size]
|
|
if len(entry.data) % 2 == 1:
|
|
assert garbage[0] == 0
|
|
if next_offset != offsets[-1]:
|
|
# (The last chunk follows a more complex garbage pattern)
|
|
assert all(x == 0 for x in garbage)
|
|
filename = os.path.join(dir, entry.name + ".aiff")
|
|
write_aiff(entry, filename)
|
|
|
|
# Generate sound bank .json files
|
|
os.makedirs(banks_out_dir, exist_ok=True)
|
|
for bank_index, bank in enumerate(banks):
|
|
filename = os.path.join(banks_out_dir, bank.name + ".json")
|
|
with open(filename, "w") as out:
|
|
|
|
def sound_to_json(sound):
|
|
entry = bank.samples[sound.sample_addr]
|
|
if len(set(entry.tunings)) == 1:
|
|
return entry.name
|
|
return {"sample": entry.name, "tuning": round_f32(sound.tuning)}
|
|
|
|
bank_json = {
|
|
"date": bank.iso_date,
|
|
"sample_bank": bank.sample_bank.name,
|
|
"envelopes": {},
|
|
"instruments": {},
|
|
"instrument_list": [],
|
|
}
|
|
addr_to_name = {}
|
|
|
|
# Envelopes
|
|
for env in bank.envelopes.values():
|
|
env_json = []
|
|
for (delay, arg) in env.entries:
|
|
if delay == 0:
|
|
ins = "stop"
|
|
assert arg == 0
|
|
elif delay == 2 ** 16 - 1:
|
|
ins = "hang"
|
|
assert arg == 0
|
|
elif delay == 2 ** 16 - 2:
|
|
ins = ["goto", arg]
|
|
elif delay == 2 ** 16 - 3:
|
|
ins = "restart"
|
|
assert arg == 0
|
|
else:
|
|
ins = [delay, arg]
|
|
env_json.append(NoIndent(ins))
|
|
bank_json["envelopes"][env.name] = env_json
|
|
|
|
# Instruments/drums
|
|
for inst_index, inst in enumerate(bank.all_insts):
|
|
if isinstance(inst, Inst):
|
|
inst_json = {
|
|
"ifdef": inst_ifdef_json(bank_index, inst_index),
|
|
"release_rate": inst.release_rate,
|
|
"normal_range_lo": inst.normal_range_lo,
|
|
"normal_range_hi": inst.normal_range_hi,
|
|
"envelope": bank.envelopes[inst.envelope].name,
|
|
}
|
|
|
|
if inst_json["ifdef"] is None:
|
|
del inst_json["ifdef"]
|
|
|
|
if inst.sound_lo is not None:
|
|
inst_json["sound_lo"] = NoIndent(sound_to_json(inst.sound_lo))
|
|
else:
|
|
del inst_json["normal_range_lo"]
|
|
|
|
inst_json["sound"] = NoIndent(sound_to_json(inst.sound_med))
|
|
|
|
if inst.sound_hi is not None:
|
|
inst_json["sound_hi"] = NoIndent(sound_to_json(inst.sound_hi))
|
|
else:
|
|
del inst_json["normal_range_hi"]
|
|
|
|
bank_json["instruments"][inst.name] = inst_json
|
|
addr_to_name[inst.addr] = inst.name
|
|
|
|
else:
|
|
assert isinstance(inst, list)
|
|
drums_list_json = []
|
|
for drum in inst:
|
|
drum_json = {
|
|
"release_rate": drum.release_rate,
|
|
"pan": drum.pan,
|
|
"envelope": bank.envelopes[drum.envelope].name,
|
|
"sound": sound_to_json(drum.sound),
|
|
}
|
|
drums_list_json.append(NoIndent(drum_json))
|
|
bank_json["instruments"]["percussion"] = drums_list_json
|
|
|
|
# Instrument lists
|
|
for addr in bank.inst_list:
|
|
if addr is None:
|
|
bank_json["instrument_list"].append(None)
|
|
else:
|
|
bank_json["instrument_list"].append(addr_to_name[addr])
|
|
|
|
out.write(json.dumps(bank_json, indent=4, cls=NoIndentEncoder))
|
|
out.write("\n")
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|