一、godwave

1.题目名字为音频编辑器，根据名字猜测音频使用工具处理过，Audacity打开，发现频谱图没有什么特点，打印幅值的绝对值看下

点击查看代码

import wavio

file = './1.wav'
wav_data = wavio.read(file)

audio_data = wav_data.data
sample_rate = wav_data.rate
cnt = 0
with open("./1.txt","w") as f:
    for i in audio_data:
        for j in i:
            f.write(str(abs(j)))
            f.write(' ')

2.发现大小的范围是成段变化的，小的部分都是小于2000，用代码跑一下数据，大于2000记作1，小于2000记作0，大概分一下可以猜测是以64个为一组，周期变化

点击查看代码

import wavio

file = './1.wav'
wav_data = wavio.read(file)

audio_data = wav_data.data
sample_rate = wav_data.rate
cnt = 0
with open("./1.txt","w") as f:
    for i in audio_data:
        for j in i:
            if abs(j) > 2000:
                f.write("1")
            else:
                f.write("0")

3.考虑到1中掺杂0，64个为一组遍历记和，当和大于5时就计为1，否则记为0

点击查看代码

import wavio

file = './1.wav'
wav_data = wavio.read(file)

audio_data = wav_data.data
sample_rate = wav_data.rate
cnt = 0
with open("./1.txt","w") as f:
    ls1 = []
    for i in audio_data:
        for j in i:
            if abs(j) > 2000:
                ls1.append(1)
            else:
                ls1.append(0)
    cnt = 0
    sum = 0
    for i in ls1:
        cnt += 1
        if cnt < 64:
            sum += i
        else:
            cnt = 0
            if sum > 5:
                f.write("1")
            else:
                f.write("0")
            sum = 0

4.01数据，猜测是可以转为二维码，但直接转得到的有问题，因而想到可能是曼彻斯特编码，0到1记为0，1到0记为1，脚本转换

点击查看代码

import wavio

file = './1.wav'
wav_data = wavio.read(file)

audio_data = wav_data.data
sample_rate = wav_data.rate
cnt = 0
with open("./1.txt","w") as f:
    ls1 = []
    for i in audio_data:
        for j in i:
            if abs(j) > 2000:
                ls1.append(1)
            else:
                ls1.append(0)
    cnt = 0
    sum = 0
    ls2 = []
    for i in ls1:
        cnt += 1
        if cnt < 64:
            sum += i
        else:
            cnt = 0
            if sum > 10:
                ls2.append("1")
            else:
                ls2.append("0")
            sum = 0
    decode_data = ""
    for i in range(0, len(ls2), 2):
        if ls2[i] == "0" and ls2[i + 1] == "1":
            decode_data += "0"
        elif ls2[i] == "1" and ls2[i + 1] == "0":
            decode_data += "1"
        else:
            print("wrong")
    f.write(decode_data)