osr-viewer/parse_osr.py at master · hannahherbig/osr-viewer · GitHub

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import lzma
import struct
import sys
from textwrap import dedent


def parse_uleb128(f):
    result = 0
    shift = 0
    while True:
        byte = struct.unpack("<B", f.read(1))[0]
        result |= (byte & 0x7F) << shift
        if (byte & 0x80) == 0:
            break
        shift += 7

    return result


def parse_string(f):
    head = struct.unpack("<B", f.read(1))[0]
    if head == 0x00:
        return ""
    elif head == 0x0B:
        length = parse_uleb128(f)
        return f.read(length).decode()


MODES = ["osu!", "Taiko", "Catch the Beat", "osu!mania"]
SHORTMODS = [
    None,
    "NF",
    "EZ",
    None,
    "HD",
    "HR",
    "SD",
    "DT",
    "RX",
    "HT",
    "NC",
    "FL",
    "AO",
    "SO",
    "AP",
    "PF",
    "4K",
    "5K",
    "6K",
    "7K",
    "8K",
    "FI",
    "RD",
    None,
    "TP",
    "9K",
    "CO",
    "1K",
    "3K",
    "2K",
]
MODS = [
    "None",
    "NoFail",
    "Easy",
    "NoVideo",
    "Hidden",
    "HardRock",
    "SuddenDeath",
    "DoubleTime",
    "Relax",
    "HalfTime",
    "NightCore",
    "Flashlight",
    "Autoplay",
    "SpunOut",
    "Autopilot",
    "Perfect",
    "Key4",
    "Key5",
    "Key6",
    "Key7",
    "Key8",
    "FadeIn",
    "Random",
    "Cinema",
    "TargetPractice",
    "Key9",
    "Co-op",
    "Key1",
    "Key3",
    "Key2",
]


def mods_to_str(n):
    i = 1
    s = set()
    while n:
        if n & 1:
            s.add(MODS[i])
        i += 1
        n >>= 1
    return ",".join(s)


def shortmods(n):
    i = 1
    s = ""
    while n:
        if n & 1:
            s += SHORTMODS[i]
        i += 1
        n >>= 1
    return s


def to_bin(n, size):
    s = ""
    while size:
        s = s + "01"[n & 1]
        n >>= 1
        size -= 1
    return s


def keys(n):
    k1 = n & 5 == 5
    k2 = n & 10 == 10
    m1 = not k1 and n & 1 == 1
    m2 = not k2 and n & 2 == 2
    smoke = n & 16 == 16
    return " ".join(
        [
            ("K1" if k1 else "  "),
            ("K2" if k2 else "  "),
            ("M1" if m1 else "  "),
            ("M2" if m2 else "  "),
            ("SMOKE" if smoke else "     "),
        ]
    )


path = sys.argv[1]

with open(path, "rb") as f:
    mode, version = struct.unpack("<BI", f.read(5))
    beatmap_md5 = parse_string(f)
    player_name = parse_string(f)
    replay_md5 = parse_string(f)
    n300, n100, n50, ngeki, nkatu, nmiss, score, combo, perfect, mods = struct.unpack(
        "<HHHHHHIH?I", f.read(23)
    )
    life_bar = parse_string(f)  # ms|life
    timestamp, length = struct.unpack("<QI", f.read(12))

    data = lzma.decompress(f.read(length)).decode()
    last_w = 0
    for record in data.split(","):
        if record:
            w, x, y, z = record.split("|")
            w, z = int(w), int(z)
            x, y = float(x), float(y)
            print("%10d %10.4f %10.4f %s" % (w, x, y, keys(z)))
            last_w = w

    print(
        dedent(
            """
        Game mode   : %s
        Version     : %d
        Beatmap MD5 : %s
        Player      : %s
        Replay MD5  : %s
        300s        : %d
        100s        : %d
        50s         : %d
        Gekis       : %d
        Katus       : %d
        Misses      : %d
        Score       : %d
        Combo       : %d
        Perfect     : %s
        Mods        : %s
        Life        : %s
        Timestamp   : %d
        Length      : %d
    """
        )
        % (
            MODES[mode],
            version,
            beatmap_md5,
            player_name,
            replay_md5,
            n300,
            n100,
            n50,
            ngeki,
            nkatu,
            nmiss,
            score,
            combo,
            perfect,
            shortmods(mods),
            life_bar,
            timestamp,
            length,
        )
    )