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nmcsup/nmcreader.py

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+
+"""音创系列的文件读取功能"""
+
+
+
+
+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:
+        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:
+        log("找不到文件或无法读取文件"+midfile)
+        return False
+    # 解析
+    ks = list(notes.values())
+    def loadMidi(track):
+        datas = []
+        for i in track:
+            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:
+        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
+
+