Channel的音频引擎是我自己写的，保存文件一直想找开源库但就是找不着。。
于是就有了以下简单粗暴打点办法：
首先是WAV的文件格式：
|
起始地址 |
占用空间 |
本地址数字的含义 |
|
00H |
4byte |
RIFF，资源交换文件标志。 |
|
04H |
4byte |
从下一个地址开始到文件尾的总字节数。高位字节在后面，这里就是001437ECH，换成十进制是1325036byte，算上这之前的8byte就正好1325044byte了。 |
|
08H |
4byte |
WAVE，代表wav文件格式。 |
|
0CH |
4byte |
FMT ，波形格式标志 |
|
10H |
4byte |
00000010H，16PCM，用16bit的数据表示一个量化结果。 |
|
14H |
2byte |
为1时表示线性PCM编码，大于1时表示有压缩的编码。这里是0001H。 |
|
16H |
2byte |
1为单声道，2为双声道，这里是0001H。 |
|
18H |
4byte |
采样频率，这里是00002B11H，也就是11025Hz。 |
|
1CH |
4byte |
Byte率=采样频率*音频通道数*每次采样得到的样本位数/8，00005622H，也就是22050Byte/s=11025*1*16/2。 |
|
20H |
2byte |
块对齐=通道数*每次采样得到的样本位数/8，0002H，也就是2=1*16/8。 |
|
22H |
2byte |
样本数据位数，0010H即16，一个量化样本占2byte。 |
|
24H |
4byte |
data，一个标志而已。 |
|
28H |
4byte |
Wav文件实际音频数据所占的大小，这里是001437C8H即1325000，再加上2CH就正好是1325044，整个文件的大小。 |
|
2CH |
不定 |
量化数据。 |
于是我们可以反着来，做一个写WAV的方法
1 namespace Channel.Core
2 {
3 public class WriteWAVFile
4 {
5 #region Public_Properties
6
7 public enum WaveBitFormat
8 {
9 Bit8=1,
10 Bit16=2,
11 Bit32=4
12 }
13 public WaveBitFormat Waveformat { get; set; }
14 public float[] Data { get; set; }
15 public string Path { get; set; }
16 public bool zipped { get; set; }
17 public int zipObject { get; set; }
18
19 #endregion
20
21 #region MainMethod
22
23 public void WriteWave()
24 {
25 FileStream fs = new FileStream(Path, FileMode.OpenOrCreate);
26 //StreamWriter sw = new StreamWriter(fs);
27 fs.Position = 0;
28
29 //写入‘riff’文件标记
30 byte[] riff = new byte[4];
31 riff[0]= Convert.ToByte(82);
32 riff[1] = Convert.ToByte(73);
33 riff[2] = Convert.ToByte(70);
34 riff[3] = Convert.ToByte(70);
35 fs.WriteByte(riff[0]);//fs.Position++;
36 fs.WriteByte(riff[1]); //fs.Position++;
37 fs.WriteByte(riff[2]); //fs.Position++;
38 fs.WriteByte(riff[3]); //fs.Position++;
39
40
41 //写入文件长度
42 System.Numerics.BigInteger len = 0;
43 len = (int)Waveformat * Data.Length + 36;
44 byte[] length = len.ToByteArray();
45 if(length.Count()==4)
46 {
47 fs.WriteByte(length[0]); //fs.Position++;
48 fs.WriteByte(length[1]); //fs.Position++;
49 fs.WriteByte(length[2]); //fs.Position++;
50 fs.WriteByte(length[3]); //fs.Position++;
51 }
52 else if (length.Count() == 3)
53 {
54 fs.WriteByte(length[0]); //fs.Position++;
55 fs.WriteByte(length[1]); //fs.Position++;
56 fs.WriteByte(length[2]); //fs.Position++;
57 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
58 }
59 else if(length.Count()==2)
60 {
61 fs.WriteByte(length[0]); //fs.Position++;
62 fs.WriteByte(length[1]); //fs.Position++;
63 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
64 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
65 }
66
67 //写入“wave fmt”
68 fs.WriteByte(Convert.ToByte(87)); //fs.Position++;
69 fs.WriteByte(Convert.ToByte(65)); //fs.Position++;
70 fs.WriteByte(Convert.ToByte(86)); //fs.Position++;
71 fs.WriteByte(Convert.ToByte(69)); //fs.Position++;
72
73 fs.WriteByte(Convert.ToByte(102)); //fs.Position++;
74 fs.WriteByte(Convert.ToByte(109)); //fs.Position++;
75 fs.WriteByte(Convert.ToByte(116)); //fs.Position++;
76 fs.WriteByte(Convert.ToByte(32)); //fs.Position++;
77
78 //写入播放位数
79 switch (Waveformat )
80 {
81 case WaveBitFormat.Bit8:
82 fs.WriteByte(Convert.ToByte(8)); //fs.Position++;
83 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
84 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
85 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
86 break;
87 case WaveBitFormat.Bit16:
88 fs.WriteByte(Convert.ToByte(16)); //fs.Position++;
89 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
90 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
91 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
92 break;
93 case WaveBitFormat.Bit32:
94 fs.WriteByte(Convert.ToByte(32)); //fs.Position++;
95 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
96 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
97 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
98 break;
99 default:
100 break;
101 }
102
103 //是否压缩
104 if(zipped)
105 {
106 fs.WriteByte(Convert.ToByte(zipObject)); //fs.Position++;
107 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
108 }
109 else
110 {
111 fs.WriteByte(Convert.ToByte(1)); //fs.Position++;
112 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
113 }
114
115 //声道
116 if(ChannelCount==1 )
117 {
118 fs.WriteByte(Convert.ToByte(1)); //fs.Position++;
119 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
120 }
121 else
122 {
123 fs.WriteByte(Convert.ToByte(2)); //fs.Position++;
124 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
125 }
126
127 //采样频率 默认 0000AC44H (44100)
128 System.Numerics.BigInteger fre = 0;
129 fre = Frequency;
130 byte[] freq = fre.ToByteArray();
131 if (freq.Count() == 4)
132 {
133 fs.WriteByte(freq[0]); //fs.Position++;
134 fs.WriteByte(freq[1]); //fs.Position++;
135 fs.WriteByte(freq[2]); //fs.Position++;
136 fs.WriteByte(freq[3]); //fs.Position++;
137 }
138 else if (freq.Count() == 3)
139 {
140 fs.WriteByte(freq[0]); //fs.Position++;
141 fs.WriteByte(freq[1]); //fs.Position++;
142 fs.WriteByte(freq[2]); //fs.Position++;
143 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
144 }
145 else if (freq.Count() == 2)
146 {
147 fs.WriteByte(freq[0]); //fs.Position++;
148 fs.WriteByte(freq[1]); //fs.Position++;
149 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
150 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
151 }
152
153 //Freq*Channel*Bit/8
154 System.Numerics.BigInteger res11 = 0;
155 res11 = Frequency*(int)Waveformat*ChannelCount;
156 byte[] res1 = res11.ToByteArray();
157 if (res1.Count() == 4)
158 {
159 fs.WriteByte(res1[0]); //fs.Position++;
160 fs.WriteByte(res1[1]); //fs.Position++;
161 fs.WriteByte(res1[2]); //fs.Position++;
162 fs.WriteByte(res1[3]); //fs.Position++;
163 }
164 else if (res1.Count() == 3)
165 {
166 fs.WriteByte(res1[0]); //fs.Position++;
167 fs.WriteByte(res1[1]); //fs.Position++;
168 fs.WriteByte(res1[2]); //fs.Position++;
169 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
170 }
171 else if (res1.Count() == 2)
172 {
173 fs.WriteByte(res1[0]); //fs.Position++;
174 fs.WriteByte(res1[1]); //fs.Position++;
175 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
176 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
177 }
178
179 //channel*bit/8
180 System.Numerics.BigInteger res22 = 0;
181 res22 =(int)Waveformat * ChannelCount;
182 byte[] res2 = res22.ToByteArray();
183 if (res2.Count() == 2)
184 {
185 fs.WriteByte(res2[0]); //fs.Position++;
186 fs.WriteByte(res2[1]); //fs.Position++;
187 }
188 else if (res2.Count() == 1)
189 {
190 fs.WriteByte(res2[0]); //fs.Position++;
191 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
192 }
193
194 //位数(没错要写两遍)
195 switch (Waveformat)
196 {
197 case WaveBitFormat.Bit8:
198 fs.WriteByte(Convert.ToByte(8)); //fs.Position++;
199 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
200 break;
201 case WaveBitFormat.Bit16:
202 fs.WriteByte(Convert.ToByte(16)); //fs.Position++;
203 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
204 break;
205 case WaveBitFormat.Bit32:
206 fs.WriteByte(Convert.ToByte(32));// fs.Position++;
207 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
208 break;
209 default:
210 break;
211 }
212
213 //data标记
214 fs.WriteByte(Convert.ToByte(100)); //fs.Position++;
215 fs.WriteByte(Convert.ToByte(97)); //fs.Position++;
216 fs.WriteByte(Convert.ToByte(116)); //fs.Position++;
217 fs.WriteByte(Convert.ToByte(97)); //fs.Position++;
218
219 //数据大小
220 len = (int)Waveformat * Data.Length;
221 byte[] lengthD = len.ToByteArray();
222 if (lengthD.Count() == 4)
223 {
224 fs.WriteByte(lengthD[0]); //fs.Position++;
225 fs.WriteByte(lengthD[1]); //fs.Position++;
226 fs.WriteByte(lengthD[2]); //fs.Position++;
227 fs.WriteByte(lengthD[3]); //fs.Position++;
228 }
229 else if (lengthD.Count() == 3)
230 {
231 fs.WriteByte(lengthD[0]); //fs.Position++;
232 fs.WriteByte(lengthD[1]); //fs.Position++;
233 fs.WriteByte(lengthD[2]); //fs.Position++;
234 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
235 }
236 else if (lengthD.Count() == 2)
237 {
238 fs.WriteByte(lengthD[0]); //fs.Position++;
239 fs.WriteByte(lengthD[1]); //fs.Position++;
240 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
241 fs.WriteByte(Convert.ToByte(0)); //fs.Position++;
242 }
243
244 //数据
245 foreach (float dataitem in Data)
246 {
247 byte[] target32;
248 byte[] target16;
249 target32 = BitConverter.GetBytes(dataitem);
250 int i =Convert.ToInt32( dataitem * 32768);
251 //string h16 = i.ToString("X");
252 //string h161=h16.Substring(4, 4);
253 target16 = BitConverter.GetBytes(i);
254
255 switch (Waveformat)
256 {
257 case WaveBitFormat.Bit8:
258 //fs.WriteByte(Convert.ToByte(8)); fs.Position++;
259 //fs.WriteByte(Convert.ToByte(0)); fs.Position++;
260 break;
261 case WaveBitFormat.Bit16:
262 fs.WriteByte(target16[0]); //fs.Position++;
263 fs.WriteByte(target16[1]); //fs.Position++;
264 break;
265 case WaveBitFormat.Bit32:
266 fs.WriteByte(target32[0]); //fs.Position++;
267 fs.WriteByte(target32[1]); //fs.Position++;
268 fs.WriteByte(target32[2]); //fs.Position++;
269 fs.WriteByte(target32[3]); //fs.Position++;
270 break;
271 default:
272 break;
273 }
274 }
275
276 //Ending
277 fs.Flush();
278 fs.Close();
279 }
280
281 #endregion
282 public int ChannelCount { get; set; }
283 public int Frequency { get; set; }
284 }
285 }
看代码中的注释就知道用处了
下面是如何调用：
1 private void saveToolStripMenuItem_Click(object sender, EventArgs e)
2 {
3 SaveFileDialog o = new SaveFileDialog();
4 o.ShowDialog();
5 Channel.Core.WriteWAVFile ww = new Core.WriteWAVFile();//新建实例
6 ww.ChannelCount = 1;//声道数
7 ww.Data = wavePainterExtended1.DataProperty;//数据
8 ww.Frequency = 44100;//采样频率
9 ww.Path = o.FileName;//保存位置
10 ww.Waveformat = Core.WriteWAVFile.WaveBitFormat.Bit16;//16bit
11 ww.zipObject = 1;//空值
12 ww.zipped = false;//不压缩
13 ww.WriteWave();//执行
14 }
运行图片：
以及保存前后的文件（数据我做了反相处理）
时间： 2024-10-05 02:25:07