public bool OpenVideoChannel(LibMWCapture.MWCAP_CHANNEL_INFO channelInfo, UInt32 dwFourcc, int cx, int cy, UInt32 nFrameDuration, IntPtr hWnd)
{
// open video device
ushort[] wpath = new ushort[512];
IntPtr pwpath = GCHandle.Alloc(wpath, GCHandleType.Pinned).AddrOfPinnedObject();
LibMWCapture.MWGetDevicePath(channelInfo.byChannelIndex, pwpath);
Board = channelInfo.byBoardIndex;
ChannelIndex = channelInfo.byChannelIndex;
VideoChannel = LibMWCapture.MWOpenChannelByPath(pwpath);
if (VideoChannel == IntPtr.Zero)
{
return(false);
}
video_callback = new LibMWCapture.VIDEO_CAPTURE_STDCALLBACK(video_callback_sub);
// create video renderer
bool reverse = dwFourcc == MWCap_FOURCC.MWCAP_FOURCC_BGR24 || dwFourcc == MWCap_FOURCC.MWCAP_FOURCC_BGRA;
D3DRenderer = LibMWMedia.MWCreateD3DRenderer(cx, cy, dwFourcc, reverse, hWnd);
if (D3DRenderer == IntPtr.Zero)
{
return(false);
}
llCount = 0;
CurrentTime = RefTime = Libkernel32.GetTickCount();
uint fourcc = (uint)dwFourcc;
int frameduration = (int)nFrameDuration;
Video = LibMWCapture.MWCreateVideoCaptureWithStdCallBack(VideoChannel, cx, cy, fourcc, frameduration, video_callback, D3DRenderer);
if (Video == IntPtr.Zero)
{
return(false);
}
if (!InitAudioCapture())
{
// может быть без аудио если этот источник уже открыт
//return false;
}
return(true);
}
public static void video_callback_sub(IntPtr pbFrame, int cbFrame, ulong u64TimeStamp, IntPtr pParam)
{
try
{
LibMWMedia.MWD3DRendererPushFrame(pParam, pbFrame, 720 * 4);
llCount += 1;
if (llCount >= 10)
{
CurrentTime = Libkernel32.GetTickCount();
unchecked
{
Fps = (llCount * 1000) / (CurrentTime - RefTime);
}
RefTime = CurrentTime;
llCount = 0;
}
}
catch (Exception ex)
{
}
}