1 public class WAVSyn
2 {
3 /// <summary>
4 /// 合成WAV文件
5 /// </summary>
6 /// <param name="fromWAVFile">合成WAV文件的源地址字符串组</param>
7 /// <param name="toWAVFile">合成的WAV文件输出位置，toFileAdd如果存在，必须确定不在使用，如果被其他程序使用，合成时报错</param>
8 /// <returns></returns>
9 public int GetSoundFile(string[] fromWAVFile,string toWAVFile)
10 {
11 //源地址字符串组的长度
12 int fromFileCount = 0;
13
14 foreach (string str in fromWAVFile)
15 {
16 if (ISWAVFile(str, "wav"))
17 {
18 fromFileCount++;
19 }
20 }
21
22
23 //传入wav集合小于2，退出，返回-1
24 if (fromFileCount < 2)
25 return -1;
26
27 //创建不为空的个数
28 System.IO.FileStream[] fs = new System.IO.FileStream[fromFileCount];
29
30 //把wav文件加载到fs数组中
31 int x = 0;
32 foreach (string temStr in fromWAVFile)
33 {
34 if(ISWAVFile(temStr,"wav"))
35 fs[x++] = new System.IO.FileStream(temStr,System.IO.FileMode.Open,System.IO.FileAccess.Read);
36 }
37
38
39 //WAV文件头大小为56个字节，包含文件头和数据头
40 //其中文件大小存在与文件头第五个字节开始的四个字节
41 //数据大小存在与文件头的第52个字节开始的四个字节
42 byte[][] bInfo = new byte[fromFileCount][];
43 for (int i = 0; i < fromFileCount; i++)
44 {
45 bInfo[i] = new byte[56];
46 fs[i].Read(bInfo[i],0,56);
47 }
48
49
50 //得到合成wav文件的大小
51 int wavFileSum = 0;
52 int[] fileSize = new int[fromFileCount];
53
54 for (int j = 0; j < fromFileCount; j++)
55 {
56 fileSize[j] = System.BitConverter.ToInt32(bInfo[j],4);
57 wavFileSum += fileSize[j];
58 }
59
60 byte[] newFileSize = System.BitConverter.GetBytes(wavFileSum);
61
62 //得到合成wav文件的数据大小
63 int dateSizeSum = 0;
64 for (int k = 0; k < fromFileCount; k++)
65 {
66 dateSizeSum += System.BitConverter.ToInt32(bInfo[k],52);
67 }
68
69 //？？？为什么要加上48？？？
70 dateSizeSum += 48;
71
72 byte[] newDateSize = System.BitConverter.GetBytes(dateSizeSum);
73
74 System.IO.FileStream toFile = new System.IO.FileStream(toWAVFile,System.IO.FileMode.Create);
75 System.IO.BinaryWriter bw = new System.IO.BinaryWriter(toFile);
76
77 byte[][] dushu = new byte[fromFileCount][];
78 for (int l = 0; l < fromFileCount; l++)
79 {
80 dushu[l] = new byte[fileSize[l]];
81 }
82
83
84 for (int i = 4, j = 0; i < 8; i++, j++)
85 {
86 bInfo[0][i] = newFileSize[j];
87 }
88
89 for (int i = 52, j = 0; i < 56; i++, j++)
90 {
91 bInfo[0][i] = newDateSize[j];
92 }
93
94 bw.Write(bInfo[0]);
95
96 for (int i = 0; i < fromFileCount; i++)
97 {
98 fs[i].Read(dushu[i],0,fileSize[i]);
99 bw.Write(dushu[i],0,fileSize[i]);
100 fs[i].Close();
101 }
102
103 bw.Flush();
104 bw.Close();
105
106 toFile.Close();
107
108 //正常结束
109 return 0;
110 }
111
112
113 //函数重载1
114 public int GetSoundFile(string fromFileAdd1, string fromFileAdd2, string toFileAdd)
115 {
116 string[] fromFileAdd = new string[] { fromFileAdd1, fromFileAdd2 };
117 return GetSoundFile(fromFileAdd, toFileAdd);
118 }
119
120 //函数重载2
121 public int GetSoundFile(string fromFileAdd1, string fromFileAdd2, string fromFileAdd3, string toFileAdd)
122 {
123 string[] fromFileAdd = new string[] { fromFileAdd1, fromFileAdd2, fromFileAdd3 };
124 return GetSoundFile(fromFileAdd, toFileAdd);
125 }
126
127 private bool ISWAVFile(string filePath, string type)
128 {
129 string strType = System.IO.Path.GetExtension(filePath);
130
131 if (filePath == string.Empty || strType == string.Empty)
132 return false;
133
134 //不需要比较扩展名，直接返回TRUE
135 if (type == string.Empty)
136 return true;
137
138 //需要比较扩展名
139 if (strType.IndexOf(type.ToLower() ) > -1)
140 return true;
141
142 return false;
143
144 }
145 }