diff --git a/z64dump.py b/z64dump.py index 54636a7..bf30c72 100755 --- a/z64dump.py +++ b/z64dump.py @@ -2,6 +2,7 @@ import sys import os, os.path +import zlib from io import BytesIO from hashlib import sha1 @@ -45,9 +46,8 @@ def dump_wrap(data, fn, size): fn += '.' + kind dump_as(data, fn, size) -def try_deflate(fn, compressed, size): +def inflate(compressed): # love you zoinkity - import zlib decomp = zlib.decompressobj(-zlib.MAX_WBITS) data = bytearray() data.extend(decomp.decompress(compressed)) @@ -56,14 +56,20 @@ def try_deflate(fn, compressed, size): data.extend(decomp.flush()) return data -def z_dump_file(f, i=0, name=None, uncompress=True): +def deflate_headerless(data): + wbits = -15 # disable header/trailer by negating windowBits + zobj = zlib.compressobj(wbits=wbits) + compressed = zobj.compress(data) + zobj.flush() + return compressed + +def z_dump_file(f, i=0, name=None, decompress=True): vs = R4(f.read(4)) # virtual start ve = R4(f.read(4)) # virtual end ps = R4(f.read(4)) # physical start pe = R4(f.read(4)) # physical end here = f.tell() - dump = uncompress and dump_wrap or dump_as + dump = decompress and dump_wrap or dump_as if vs == ve == ps == pe == 0: return False @@ -90,14 +96,14 @@ def z_dump_file(f, i=0, name=None, uncompress=True): f.seek(ps) compressed = f.read(pe - ps) if compressed[:4] == b'Yaz0': - if uncompress: + if decompress: data = Yaz0.decode(compressed) dump(data, fn, size) else: dump(compressed, fn+'.Yaz0', len(compressed)) else: - if uncompress: - data = try_deflate(fn, compressed, size) + if decompress: + data = inflate(compressed) if data is None or len(data) == 0: lament('unknown compression; skipping:', fn) lament(compressed[:4]) @@ -124,7 +130,7 @@ def z_find_dma(f): else: f.seek(len(rest), 1) -def z_dump(f, names=None, uncompress=True): +def z_dump(f, names=None, decompress=True): f.seek(0x1060) # skip header when finding dmatable addr = z_find_dma(f) if addr == None: @@ -139,17 +145,17 @@ def z_dump(f, names=None, uncompress=True): i = 0 if names: for n in names: - if z_dump_file(f, i, n, uncompress): + if z_dump_file(f, i, n, decompress): i += 1 else: lament("ran out of filenames") break - while z_dump_file(f, i, None, uncompress): + while z_dump_file(f, i, None, decompress): i += 1 if names and i > len(names): lament("extraneous filenames") -def dump_rom(fn, uncompress=True): +def dump_rom(fn, decompress=True): with open(fn, 'rb') as f: data = f.read() @@ -187,7 +193,7 @@ def dump_rom(fn, uncompress=True): names = [n.strip() for n in names] with SubDir(romhash): f.seek(0) - z_dump(f, names, uncompress) + z_dump(f, names, decompress) def z_read_file(path, fn=None): if fn == None: @@ -244,10 +250,13 @@ def fix_rom(f): def align(x): return (x + 15) // 16 * 16 -def create_rom(d, compress=False): +def create_rom(d, compression=None, nocomplist=None): root, _, files = next(os.walk(d)) files.sort() + if nocomplist is None: + nocomplist = [] + rom_size = 64*1024*1024 with open(d+'.z64', 'w+b') as f: dma = [] @@ -278,18 +287,26 @@ def create_rom(d, compress=False): else: start_v = align(start_v) start_p = align(start_p) - if compress and unempty: + if compression and unempty and i not in nocomplist: lament('Comp…: {}'.format(fn)) - data = Yaz0.encode(data) + if compression == 'yaz': + data = Yaz0.encode(data) + elif compression == 'zlib': + data = deflate_headerless(data) + else: + raise Exception("unsupported compression: " + compression) size_p = len(data) - lament("Ratio: {:3}%".format(int(size_p / size_v * 100))) + lament("Ratio: {:3.0%}".format(size_p / size_v)) compressed = True if unempty: ps = start_p if compressed: pe = align(start_p + size_p) - ve = vs + int.from_bytes(data[4:8], 'big') + if compression == 'yaz': + ve = vs + int.from_bytes(data[4:8], 'big') + else: + ve = vs + size_v else: pe = 0 ve = vs + size_v @@ -323,24 +340,39 @@ def create_rom(d, compress=False): fix_rom(f) def run(args): - compress = False + decompress = True + compression = None + nocomplist = None # file indices to skip compression on fix = False - for path in args: - if path == '-c': - compress = not compress - continue - if path == '-f': + + for arg in args: + if arg == '-f': fix = not fix continue + if arg == '-c': + decompress = not decompress + continue + if arg == '-n': + compression = None + continue + if arg == '-y': + compression = 'yaz' + continue + if arg == '-z': + compression = 'zlib' + continue + + path = arg if fix: with open(path, 'r+b') as f: fix_rom(f) continue + # directories are technically files, so check this first if os.path.isdir(path): - create_rom(path, compress) + create_rom(path, compression, nocomplist) elif os.path.isfile(path): - dump_rom(path, not compress) + dump_rom(path, decompress) else: lament('no-op:', path)