public byte[] GetWavHeader()
{
WavHeaderStruct wavhead = new WavHeaderStruct();
UInt32 data_sz = 1024 * 1024;
UInt32 riff_sz = data_sz + 36;
wavhead.riff.ChunkID = 0X46464952;
wavhead.riff.ChunkSize = riff_sz;
wavhead.riff.Format = 0X45564157;
wavhead.fmt.ChunkID = 0X20746D66;
wavhead.fmt.ChunkSize = 16;
wavhead.fmt.AudioFormat = 0X01;
wavhead.fmt.NumOfChannels = 1;
wavhead.fmt.SampleRate = 8000;
wavhead.fmt.ByteRate = wavhead.fmt.SampleRate * 2;
wavhead.fmt.BlockAlign = 2;
wavhead.fmt.BitsPerSample = 16;
wavhead.data.ChunkID = 0X61746164;
wavhead.data.ChunkSize = data_sz;
byte[] ret = Struct2Byte(wavhead);
return(ret);
}
private byte[] Struct2Byte(WavHeaderStruct s)
{
int structSize = Marshal.SizeOf(typeof(WavHeaderStruct));
byte[] buffer = new byte[structSize];
//分配结构体大小的内存空间
IntPtr structPtr = Marshal.AllocHGlobal(structSize);
//将结构体拷到分配好的内存空间
Marshal.StructureToPtr(s, structPtr, false);
//从内存空间拷到byte数组
Marshal.Copy(structPtr, buffer, 0, structSize);
//释放内存空间
Marshal.FreeHGlobal(structPtr);
return(buffer);
}
