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 LibMWCapture.MWCAP_CHANNEL_INFO?GetChannelInfoByIndex(int channelIndex)
{
RefreshDevices();
var videoChannelCount = GetChannelCount();
if (videoChannelCount == 0)
{
return(null);
}
for (int i = 0; i < videoChannelCount; i++)
{
LibMWCapture.MWCAP_CHANNEL_INFO channelInfo = new LibMWCapture.MWCAP_CHANNEL_INFO();
GetChannelInfobyIndex(i, ref channelInfo);
if (channelInfo.byChannelIndex == channelIndex)
{
return(channelInfo);
}
}
return(null);
}
public static void GetChannelInfobyIndex(int nChannelIndex, ref LibMWCapture.MWCAP_CHANNEL_INFO channelInfo)
{
channelInfo = PInvokeTools.ReadStruct <LibMWCapture.MWCAP_CHANNEL_INFO>(ptr =>
LibMWCapture.MWGetChannelInfoByIndex(nChannelIndex, ptr));
}
