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sdat.py
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sdat.py
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"""Sound Data Archive"""
import array
from itertools import izip
import os
from generic import Editable
from generic.archive import Archive
from generic.collection import SizedCollection
from util import BinaryIO
class SYMB(Editable):
"""SDAT Symbols
These contain the "filenames" of the archive data.
"""
record_names = ['SEQ', 'SEQARC', 'BANK', 'WAVEARC', 'PLAYER',
'GROUP', 'PLAYER2', 'STRM']
def define(self, sdat):
self.sdat = sdat
self.string('magic', length=4, default='SYMB')
self.uint32('size')
self.array('record_offsets', self.uint32, length=14)
self.records = {}
def load(self, reader):
reader = BinaryIO.reader(reader)
start = reader.tell()
Editable.load(self, reader)
self.records = {}
for record_ofs, record_name in zip(self.record_offsets,
self.record_names):
if not record_ofs:
continue
reader.seek(start+record_ofs)
num = reader.readUInt32()
if record_name == 'SEQARC':
offsets = []
for i in range(num):
offsets.append((reader.readUInt32(), reader.readUInt32()))
entries = []
for i, (offset, sub_offset) in enumerate(offsets):
reader.seek(start+offset)
name = reader.readString()
reader.seek(start+sub_offset)
prefix = (record_name, name)
entries += self.load_entries(reader, start, prefix, num)
else:
entries = self.load_entries(reader, start, (record_name,), num)
self.records[record_name] = entries
@staticmethod
def load_entries(reader, base_offset, prefix, num):
offsets = []
for i in range(num):
offsets.append(reader.readUInt32())
entries = []
for i, offset in enumerate(offsets):
if not offset:
entries.append(prefix+(str(i),))
continue
reader.seek(base_offset+offset)
entries.append(prefix+(reader.readString(),))
return entries
def save(self, writer=None):
writer = BinaryIO.writer(writer)
start = writer.tell()
writer = Editable.save(self, writer)
for record_idx, record_name in enumerate(self.record_names):
self.record_offsets[record_idx] = writer.tell()-start
if record_name == 'SEQARC':
prefixes = set()
offsets = []
for entry in self.records[record_name]:
if entry[0] == record_name:
prefixes.add(entry[1])
writer.writeUInt32(len(prefixes))
ofs_ofs = writer.tell()
for i in range(len(prefixes)*2):
writer.writeUInt32(0)
for name in prefixes:
offsets.append(writer.tell()-start)
writer.writeString(name)
writer.writeAlign(8)
offsets.append(writer.tell()-start)
num, text_writer = self.save_entries(
self.records[record_name], writer.tell()-start+4,
(record_name, name))
writer.writeUInt32(num)
writer.write(text_writer.getvalue())
with writer.seek(ofs_ofs):
writer.write(array.array('I', offsets).tostring())
else:
num, text_writer = self.save_entries(
self.records[record_name], writer.tell()-start+4,
(record_name,))
writer.writeUInt32(num)
writer.write(text_writer.getvalue())
writer.writeAlign(8)
self.size = writer.tell()-start
with writer.seek(start):
writer = Editable.save(self, writer)
return writer
@staticmethod
def save_entries(entries, base_offset, prefix):
entry_names = []
offsets = []
text_writer = BinaryIO()
for entry in entries:
if entry[:-1] == prefix:
entry_names.append(entry[-1])
for i in range(len(entry_names)):
text_writer.writeUInt32(0)
for entry in entry_names:
offsets.append(text_writer.tell()+base_offset)
text_writer.writeString(entry)
with text_writer.seek(0):
text_writer.write(array.array('I', offsets).tostring())
return len(entry_names), text_writer
class InfoSEQ(Editable):
# accelerated = True
def define(self):
self.uint16('file_id')
self.uint16('u2')
self.uint16('bank_id')
self.uint8('volume')
self.uint8('cpr')
self.uint8('ppr')
self.uint8('poly')
self.uint16('ua')
class InfoARC(Editable):
"""Info for both SEQARC and WAVEARC"""
accelerated = True
def define(self):
self.uint16('file_id')
self.uint16('u2')
class InfoBANK(Editable):
accelerated = True
def define(self):
self.uint16('file_id')
self.uint16('u2')
self.array('wavearc_ids', self.uint16, length=4)
class InfoPLAYER(Editable):
accelerated = True
def define(self):
self.uint32('u0')
self.uint32('u4')
class InfoGROUPEntry(Editable):
accelerated = True
def define(self):
self.uint32('type_')
self.uint32('entry_id')
class InfoGROUP(Editable):
def define(self):
self.uint32('num')
self.entries = []
def load(self, reader):
Editable.load(self, reader)
self.entries = SizedCollection(InfoGROUPEntry().base_struct,
length=self.num)
def save(self, writer=None):
self.num = len(self.entries)
writer = Editable.save(self, writer)
writer = self.entries.save(writer)
return writer
class InfoPLAYER2(Editable):
accelerated = True
def define(self):
self.array('u0', self.uint8, length=24)
class InfoSTRM(Editable):
accelerated = True
def define(self):
self.uint16('file_id')
self.uint16('unknown')
self.uint8('volume')
self.uint8('pri')
self.uint8('ply')
self.uint8('u7')
self.uint32('u8')
class INFO(Editable):
record_classes = [InfoSEQ, InfoARC, InfoBANK, InfoARC, InfoPLAYER,
InfoGROUP, InfoPLAYER2, InfoSTRM]
def define(self, sdat):
self.sdat = sdat
self.string('magic', length=4, default='INFO')
self.uint32('size_')
self.array('record_offsets', self.uint32, length=14)
self.records = {}
def load(self, reader):
reader = BinaryIO.reader(reader)
start = reader.tell()
Editable.load(self, reader)
self.records = {}
for i, record_ofs in enumerate(self.record_offsets):
if not record_ofs:
continue
reader.seek(start+record_ofs)
num = reader.readUInt32()
offsets = SizedCollection(self.uint32, length=num)
offsets.load(reader=reader)
first_entry = expected = reader.tell()-start
template_entry = self.record_classes[i]()
entry_size = template_entry.get_size()
for offset in offsets.entries:
if offset != expected:
break
else:
entries = SizedCollection(template_entry.base_struct,
length=num)
entries.load(reader=reader)
self.records[SYMB.record_names[i]] = entries
continue
adjusted_num = (max(offsets.entries[:]+[first_entry])-first_entry)/entry_size+1
entries = SizedCollection(template_entry.base_struct,
length=adjusted_num)
entries.load(reader=reader)
new_entries = SizedCollection(self.record_classes[i]().base_struct,
length=num)
for idx, offset in enumerate(offsets.entries):
if not offset: # what are these entries even?
new_entries[idx].file_id = 0
continue
target = (offset-first_entry)/entry_size
new_entries[idx] = entries.entries[target]
self.records[SYMB.record_names[i]] = new_entries
class FAT(Editable):
def define(self, sdat):
self.sdat = sdat
self.string('magic', length=4, default='FAT ')
self.uint32('size_')
self.uint32('num')
self.entries = []
def load(self, reader):
Editable.load(self, reader)
self.entries = []
for i in range(self.num):
start = reader.readUInt32()
stop = start+reader.readUInt32()
reader.read(8)
self.entries.append(slice(start, stop))
class FILE(Editable):
def define(self, sdat):
self.sdat = sdat
self.string('magic', length=4, default='FILE')
self.uint32('size_')
self.uint32('num')
self.uint32('uc')
self.files = []
class SDAT(Archive, Editable):
"""Sound Data Archive"""
extension = '' # filenames include their own extension
def define(self):
self.string('magic', length=4, default='SDAT')
self.uint16('endian', default=0xFEFF)
self.uint16('version', default=0x0001)
self.uint32('size_')
self.uint16('headersize')
self.uint16('numblocks', default=4)
block_ofs = Editable()
block_ofs.uint32('block_offset')
block_ofs.uint32('block_size')
block_ofs.freeze()
self.array('block_offsets', block_ofs.base_struct, length=8)
self.symb = SYMB(self)
self.info = INFO(self)
self.fat = FAT(self)
self.file = FILE(self)
self._files = None
@property
def files(self):
if self._files is not None:
return self._files
self._files = files = {}
for name in SYMB.record_names:
try:
self.info.records[name][0].file_id
except:
continue
for name_parts, entry in izip(self.symb.records[name],
self.info.records[name]):
data = self.file.files[entry.file_id]
files['/'.join(name_parts)+'.'+data[:4].lower()] = data
return files
def reset(self):
self._files = {}
def load(self, reader):
reader = BinaryIO.reader(reader)
start = reader.tell()
Editable.load(self, reader)
assert self.magic == 'SDAT'
for block_ofs, block in zip(self.block_offsets, [
self.symb, self.info, self.fat, self.file]):
if not block_ofs.block_offset:
continue
reader.seek(start+block_ofs.block_offset)
block.load(reader)
self.file.files = []
for entry in self.fat.entries:
reader.seek(start+entry.start)
self.file.files.append(reader.read(entry.stop-entry.start))
def save(self, writer=None):
for name, data in self.files.iteritems():
name = os.path.splitext(name)[0]
name_parts = name.split('/')
record_name = name_parts.pop(0)
if name_parts not in self.symb.records[record_name]:
self.symb.records[record_name].append(name_parts)
# TODO: handle new info entries?!
writer = BinaryIO.writer(writer)
start = writer.tell()
writer = Editable.save(self, writer)
for block_ofs, block in zip(self.block_offsets, [
self.symb, self.fat, self.info, self.file]):
block_ofs.block_offset = writer.tell()-start
writer = block.save(writer)
writer.writeAlign(4)
block_ofs.block_size = writer.tell()-start-block_ofs.block_offset
with writer.seek(start):
writer = Editable.save(self, writer)
return writer