Musicreater/nmcsup/nmcreader.py

"""音创系列的文件读取功能"""

# 诸葛亮与八卦阵帮忙修改语法 日期：---2022年1月19日
# 统计：致命（三级）错误：0个；警告（二级）错误：3个；语法（一级）错误：22个


from nmcsup.log import log
from nmcsup.const import notes


# 从格式文本文件读入一个音轨并存入一个列表
def ReadFile(fn: str):  # -> list
    from nmcsup.trans import note2list
    log('打开' + fn + "并读取音符")
    try:
        nat = open(fn, 'r', encoding='UTF-8').read().split(" ")
        del fn
    except FileNotFoundError:
        log("找不到读取目标文件")
        return False
    Notes = []
    log(str(nat) + "已读取")
    for i in range(int(len(nat) / 2)):
        Notes.append([nat[i * 2], float(nat[i * 2 + 1])])
    Notes = note2list(Notes)
    log('音符数据更新' + str(Notes))
    return [Notes, ]


# 从midi读入多个音轨，返回多个音轨列表
def ReadMidi(midfile: str):  # -> list
    import mido
    from msctspt.threadOpera import NewThread
    Notes = []
    try:
        mid = mido.MidiFile(midfile)
    except FileNotFoundError:
        log("找不到文件或无法读取文件" + midfile)
        return False
    # 解析
    ks = list(notes.values())

    def loadMidi(track1):
        datas = []
        for i in track1:
            if i.is_meta:
                log('元信息' + str(i))
                pass  # 不处理元信息
            elif 'note_on' in str(i):
                msg = str(i).replace("note=", '').replace("time=", '').split(" ")
                log('音符on消息，处理后：' + str(msg))
                if msg[4] == '0':
                    datas.append([ks[int(msg[2]) - 20][0], 1.0])
                    log('延续时间0tick--：添加音符' + str([ks[int(msg[2]) - 20][0], 1.0]))
                else:
                    datas.append([ks[int(msg[2]) - 20][0], float(msg[4]) / 480])
                    log('延续时间' + msg[4] + 'tick--：添加音符' + str([ks[int(msg[2]) - 20][0], float(msg[4]) / 480]))
                del msg
        log('音符增加' + str(datas))
        return datas

    for j, track in enumerate(mid.tracks):
        th = NewThread(loadMidi, (track,))
        th.start()
        Notes.append(th.getResult())
    del ks
    return Notes


def ReadOldProject(fn: str):  # -> list
    import json
    from nmcsup.trans import note2list
    log("读取文件：" + fn)
    try:
        with open(fn, 'r', encoding='UTF-8') as c:
            dataset = json.load(c)
    except FileNotFoundError:
        print('找不到文件：' + fn + "，请查看您是否输入正确")
        log("丢失" + fn)
        return False
    for i in range(len(dataset['musics'])):
        dataset['musics'][i]['notes'] = note2list(dataset['musics'][i]['notes'])
    # 返回 音轨列表 选择器
    return dataset