/// <summary>
/// 服务启动调用
/// </summary>
public void Init()
{
//以下初始化音频采集
for (int i = 0; i < MAXRECBUFFER; i++)
{
var hdr = new PcmAudio.WaveHdr
{
lpData = Marshal.AllocHGlobal(RECBUFFER),
dwBufferLength = (UInt32)RECBUFFER
};
globalhdr[i] = hdr;
}
lpFormat.wFormatTag = 1; //声音格式为PCM
lpFormat.nChannels = 1; //采样声道数，对于单声道音频设置为1，立体声设置为2
lpFormat.wBitsPerSample = 16; //采样比特 16bits/次
lpFormat.cbSize = 0; //一般为0
lpFormat.nSamplesPerSec = 8000; //采样率 8000 次/秒
lpFormat.nBlockAlign = 2; //一个块的大小，采样bit的字节数乘以声道数
lpFormat.nAvgBytesPerSec = 16000; //每秒的数据率，就是每秒能采集多少字节的数据
////初始化音频格式结构体
//lpFormatPlay.wFormatTag = 1;//声音格式为PCM
//lpFormatPlay.nChannels = 1;
//lpFormatPlay.wBitsPerSample = 16;
//lpFormatPlay.cbSize = 0;
//lpFormatPlay.nSamplesPerSec = 8000;
//lpFormatPlay.nAvgBytesPerSec = 16000;
//lpFormatPlay.nBlockAlign = 2;
}
/// <summary>
/// 喊话处理
/// </summary>
/// <param name="hdr"></param>
private void OnSoundData(PcmAudio.WaveHdr hdr)
{
if (!IsRecoding)
{
return;
}
if (hdr.dwBytesRecorded == 0)
{
return;
}
//使采集过程，直到此buffer已经沾满，不能再填充
PcmAudio.waveInUnprepareHeader(hRecord, ref hdr, (UInt32)Marshal.SizeOf(typeof(PcmAudio.WaveHdr)));
//将采集到的声音发送给播放线程
if (hdr.lpData != IntPtr.Zero)
{
DataProc(hdr.dwBytesRecorded, hdr.lpData);
}
}
