private void Form1_Load(object sender, EventArgs e)
{
sound = new DirectSoundHelper();
sound.OnBufferFulfill += new EventHandler(SendVoiceBuffer);
}
public override bool Open(WaveFormat af)
{
this.windowHandle = GetDesktopWindow();
this.audioFormat = af;
#region 创建DirectSound对象
int dsErr = DirectSoundHelper.DirectSoundCreate8(IntPtr.Zero, out this.pds8, IntPtr.Zero);
if (dsErr != DSERR.DS_OK)
{
logger.ErrorFormat("DirectSoundCreate8失败, DSERR = {0}", dsErr);
return(false);
}
this.ds8 = Marshal.GetObjectForIUnknown(this.pds8) as IDirectSound8;
dsErr = this.ds8.SetCooperativeLevel(this.windowHandle, DSSCL.DSSCL_NORMAL);
if (dsErr != DSERR.DS_OK)
{
logger.ErrorFormat("SetCooperativeLevel失败, DSERR = {0}", dsErr);
return(false);
}
#endregion
#region 创建音频缓冲区对象
this.wfx = new WAVEFORMATEX()
{
nChannels = (short)this.audioFormat.Channel,
nSamplesPerSec = this.audioFormat.SamplesPerSec,
wBitsPerSample = (short)this.audioFormat.BitsPerSample,
nBlockAlign = (short)this.audioFormat.BlockAlign,
nAvgBytesPerSec = this.audioFormat.AvgBytesPerSec,
cbSize = 0,
wFormatTag = DirectSoundHelper.WAVE_FORMAT_PCM
};
this.pwfx_free = Utils.StructureToPtr(this.wfx);
this.dsbd = new DSBUFFERDESC()
{
dwSize = Marshal.SizeOf(typeof(DSBUFFERDESC)),
dwFlags = DSBCAPS.DSBCAPS_CTRLPOSITIONNOTIFY | DSBCAPS.DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS.DSBCAPS_GLOBALFOCUS | DSBCAPS.DSBCAPS_CTRLVOLUME,
lpwfxFormat = this.pwfx_free,
guid3DAlgorithm = new GUID(),
dwBufferBytes = audioFormat.AvgBytesPerSec,
dwReserved = 0
};
this.buffer_size = audioFormat.AvgBytesPerSec;
this.min_free_space = this.wfx.nBlockAlign;
IntPtr pdsb;
dsErr = this.ds8.CreateSoundBuffer(ref this.dsbd, out pdsb, IntPtr.Zero);
if (dsErr != DSERR.DS_OK)
{
logger.ErrorFormat("CreateSoundBuffer失败, DSERR = {0}", dsErr);
return(false);
}
Guid iid_dsb8 = new Guid(IID.IID_IDirectSoundBuffer8);
Marshal.QueryInterface(pdsb, ref iid_dsb8, out this.pdsb8);
Marshal.Release(pdsb);
this.dsb8 = Marshal.GetObjectForIUnknown(this.pdsb8) as IDirectSoundBuffer8;
#endregion
return(true);
}
