public static LibMWCapture.MWCAP_VIDEO_SIGNAL_STATUS?GetSignalStatus(int channelIndex, out LibMWCapture.MWCAP_AUDIO_VOLUME? audioStatus)
{
audioStatus = null;
ushort[] wpath = new ushort[512];
IntPtr pwpath = GCHandle.Alloc(wpath, GCHandleType.Pinned).AddrOfPinnedObject();
LibMWCapture.MWGetDevicePath(channelIndex, pwpath);
var videoChannel = LibMWCapture.MWOpenChannelByPath(pwpath);
if (videoChannel == IntPtr.Zero)
{
return(null);
}
try
{
audioStatus = PInvokeTools.ReadStruct <LibMWCapture.MWCAP_AUDIO_VOLUME>(ptr =>
LibMWCapture.MWGetAudioVolume(videoChannel, LibMWCapture.MWCAP_AUDIO_NODE.MWCAP_AUDIO_EMBEDDED_CAPTURE, ptr));
return(PInvokeTools.ReadStruct <LibMWCapture.MWCAP_VIDEO_SIGNAL_STATUS>(
ptr =>
LibMWCapture.MWGetVideoSignalStatus(videoChannel, ptr)));
}
finally
{
LibMWCapture.MWCloseChannel(videoChannel);
}
}
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);
}
