public VideoPreviewViewmodel()
{
View = new VideoPreviewView {
DataContext = this
};
_videoSources = new ObservableCollection <string>(new[] { Common.Properties.Resources._none_ });
_videoSource = _videoSources.FirstOrDefault();
CommandRefreshSources = new UICommand
{
ExecuteDelegate = RefreshSources,
CanExecuteDelegate = o => _ndiFindInstance != IntPtr.Zero
};
CommandGotoNdiWebsite = new UICommand {
ExecuteDelegate = GotoNdiWebsite
};
CommandShowPopup = new UICommand {
ExecuteDelegate = o => DisplayPopup = true
};
CommandHidePopup = new UICommand {
ExecuteDelegate = o => DisplayPopup = false
};
InitNdiFind();
if (_ndiFindInstance != IntPtr.Zero)
{
Task.Run(() =>
{
if (Ndi.NDIlib_find_wait_for_sources(_ndiFindInstance, 5000))
{
Thread.Sleep(3000);
Application.Current?.Dispatcher.BeginInvoke((Action) delegate { RefreshSources(null); });
}
});
}
}
private void Connect(string sourceName)
{
if (string.IsNullOrEmpty(sourceName) || _ndiSources == null || !_ndiSources.ContainsKey(sourceName))
{
return;
}
NDIlib_source_t source = _ndiSources[sourceName];
NDIlib_recv_create_t recvDescription = new NDIlib_recv_create_t()
{
source_to_connect_to = source,
color_format = NDIlib_recv_color_format_e.NDIlib_recv_color_format_e_BGRX_BGRA,
bandwidth = NDIlib_recv_bandwidth_e.NDIlib_recv_bandwidth_lowest
};
_ndiReceiveInstance = Ndi.NDIlib_recv_create(ref recvDescription);
if (_ndiReceiveInstance != IntPtr.Zero)
{
// start up a thread to receive on
_ndiReceiveThread = new Thread(ReceiveThreadProc)
{
IsBackground = true, Name = "Newtek Ndi video preview plugin receive thread"
};
_ndiReceiveThread.Start();
}
}
protected override void OnDispose()
{
Disconnect();
if (_ndiFindInstance != IntPtr.Zero)
{
Ndi.NDIlib_find_destroy(_ndiFindInstance);
}
}
private void ReceiveThreadProc()
{
var recvInstance = _ndiReceiveInstance;
if (recvInstance == IntPtr.Zero)
{
return;
}
while (!_exitReceiveThread)
{
NDIlib_video_frame_t videoFrame = new NDIlib_video_frame_t();
NDIlib_audio_frame_t audioFrame = new NDIlib_audio_frame_t();
NDIlib_metadata_frame_t metadataFrame = new NDIlib_metadata_frame_t();
switch (Ndi.NDIlib_recv_capture(recvInstance, ref videoFrame, ref audioFrame, ref metadataFrame, 1000))
{
case NDIlib_frame_type_e.NDIlib_frame_type_video:
if (videoFrame.p_data == IntPtr.Zero)
{
Ndi.NDIlib_recv_free_video(recvInstance, ref videoFrame);
break;
}
int yres = (int)videoFrame.yres;
int xres = (int)videoFrame.xres;
double dpiY = 96.0 * (videoFrame.picture_aspect_ratio / ((double)xres / yres));
int stride = (int)videoFrame.line_stride_in_bytes;
int bufferSize = yres * stride;
Application.Current?.Dispatcher.BeginInvoke(new Action(delegate
{
if (VideoBitmap == null ||
VideoBitmap.PixelWidth != xres ||
VideoBitmap.PixelHeight != yres)
{
VideoBitmap = new WriteableBitmap(xres, yres, 96, dpiY, System.Windows.Media.PixelFormats.Pbgra32, null);
}
// update the writeable bitmap
VideoBitmap.Lock();
VideoBitmap.WritePixels(new Int32Rect(0, 0, xres, yres), videoFrame.p_data, bufferSize, stride);
VideoBitmap.Unlock();
Ndi.NDIlib_recv_free_video(recvInstance, ref videoFrame);
}));
break;
case NDIlib_frame_type_e.NDIlib_frame_type_audio:
Ndi.NDIlib_recv_free_audio(recvInstance, ref audioFrame);
break;
case NDIlib_frame_type_e.NDIlib_frame_type_metadata:
Ndi.NDIlib_recv_free_metadata(recvInstance, ref metadataFrame);
break;
}
}
Debug.WriteLine(this, "Receive thread exited");
}
/// <summary>
/// Method accepts address in form ndi://ip_address:port and ndi://ip_address:ndi_name
/// </summary>
/// <param name="sourceUrl"></param>
public void SetSource(string sourceUrl)
{
if (string.IsNullOrWhiteSpace(sourceUrl))
{
return;
}
Uri sourceUri = null;
if ((Uri.TryCreate(sourceUrl, UriKind.Absolute, out sourceUri) && sourceUri.Scheme == "ndi") ||
string.Equals(sourceUrl.Substring(0, sourceUrl.IndexOf(':')), "ndi", StringComparison.InvariantCultureIgnoreCase))
{
Application.Current.Dispatcher.BeginInvoke((Action) delegate
{
if (_ndiSources == null)
{
return;
}
string source = null;
if (sourceUri != null)
{
source = _ndiSources.FirstOrDefault(s => Ndi.Utf8ToString(s.Value.p_ip_address) == sourceUri.Host).Key;
}
else
{
string address = sourceUrl.Substring(sourceUrl.IndexOf("//") + 2);
if (!string.IsNullOrWhiteSpace(address))
{
string host = address.Substring(0, address.IndexOf(':'));
string name = address.Substring(address.IndexOf(':') + 1);
var ndi = _ndiSources.FirstOrDefault(s =>
{
string ndiFullAddress = Ndi.Utf8ToString(s.Value.p_ip_address);
string ndiFullName = Ndi.Utf8ToString(s.Value.p_ndi_name);
int openingBraceIndex = ndiFullName.IndexOf('(', 1);
int closingBraceIndex = ndiFullName.IndexOf(')', openingBraceIndex);
if (openingBraceIndex > 0 &&
closingBraceIndex > openingBraceIndex &&
ndiFullAddress.Substring(0, ndiFullAddress.IndexOf(':')).Equals(host, StringComparison.InvariantCultureIgnoreCase) &&
ndiFullName.Substring(openingBraceIndex + 1, closingBraceIndex - openingBraceIndex - 1).Equals(name, StringComparison.InvariantCultureIgnoreCase))
{
return(true);
}
return(false);
}).Key;
}
}
if (!string.IsNullOrWhiteSpace(source))
{
VideoSource = source;
}
});
}
}
private void Disconnect()
{
if (_ndiReceiveThread != null)
{
_exitReceiveThread = true;
_ndiReceiveThread.Join(1000);
}
_ndiReceiveThread = null;
_exitReceiveThread = false;
Ndi.NDIlib_recv_destroy(_ndiReceiveInstance);
_ndiReceiveInstance = IntPtr.Zero;
}
private void InitNdiFind()
{
Ndi.AddRuntimeDir();
var findDesc = new NDIlib_find_create_t()
{
p_groups = IntPtr.Zero,
show_local_sources = true,
p_extra_ips = IntPtr.Zero
};
_ndiFindInstance = Ndi.NDIlib_find_create2(ref findDesc);
}
public VideoPreviewViewmodel()
{
View = new VideoPreviewView {
DataContext = this
};
_videoSources = new ObservableCollection <string>(new[] { Common.Properties.Resources._none_ });
_videoSource = _videoSources.FirstOrDefault();
CommandRefreshSources = new UICommand
{
ExecuteDelegate = RefreshSources,
CanExecuteDelegate = o => _ndiFindInstance != IntPtr.Zero
};
CommandGotoNdiWebsite = new UICommand {
ExecuteDelegate = GotoNdiWebsite
};
CommandShowPopup = new UICommand {
ExecuteDelegate = o => DisplayPopup = true
};
CommandHidePopup = new UICommand {
ExecuteDelegate = o => DisplayPopup = false
};
InitNdiFind();
var sourcesPoolThread = new Thread(() =>
{
while (_ndiFindInstance != IntPtr.Zero)
{
if (Ndi.NDIlib_find_wait_for_sources(_ndiFindInstance, int.MaxValue))
{
OnUiThread(() => RefreshSources(null));
}
}
})
{
Name = "NDI source list pooling thread",
Priority = ThreadPriority.BelowNormal,
IsBackground = true
};
sourcesPoolThread.Start();
}
private static void RefreshSources()
{
var numSources = 0;
var ndiSources = Ndi.NDIlib_find_get_current_sources(NdiFindInstance, ref numSources);
if (numSources <= 0)
{
return;
}
var sourceSizeInBytes = Marshal.SizeOf(typeof(NDIlib_source_t));
var sources = new Dictionary <string, NDIlib_source_t>();
for (var i = 0; i < numSources; i++)
{
var p = IntPtr.Add(ndiSources, (i * sourceSizeInBytes));
var src = (NDIlib_source_t)Marshal.PtrToStructure(p, typeof(NDIlib_source_t));
var ndiName = Ndi.Utf8ToString(src.p_ndi_name);
sources.Add(ndiName, src);
Debug.WriteLine($"Added source name:{Ndi.Utf8ToString(src.p_ndi_name)} address :{Ndi.Utf8ToString(src.p_ip_address)}");
}
_ndiSources = sources;
SourceRefreshed?.Invoke(null, EventArgs.Empty);
}
static VideoPreviewViewmodel()
{
Ndi.AddRuntimeDir();
var findDesc = new NDIlib_find_create_t
{
p_groups = IntPtr.Zero,
show_local_sources = true,
p_extra_ips = IntPtr.Zero
};
NdiFindInstance = Ndi.NDIlib_find_create2(ref findDesc);
var sourcesPoolThread = new Thread(() =>
{
try
{
while (true)
{
if (Ndi.NDIlib_find_wait_for_sources(NdiFindInstance, int.MaxValue))
{
RefreshSources();
}
}
}
catch (Exception e)
{
Console.WriteLine(e);
}
})
{
Name = "NDI source list pooling thread",
Priority = ThreadPriority.BelowNormal,
IsBackground = true
};
sourcesPoolThread.Start();
}
private void RefreshSources(object obj)
{
if (_ndiFindInstance != IntPtr.Zero)
{
int numSources = 0;
var ndi_sources = Ndi.NDIlib_find_get_current_sources(_ndiFindInstance, ref numSources);
if (numSources > 0)
{
int SourceSizeInBytes = System.Runtime.InteropServices.Marshal.SizeOf(typeof(NDIlib_source_t));
Dictionary <string, NDIlib_source_t> sources = new Dictionary <string, NDIlib_source_t>();
for (int i = 0; i < numSources; i++)
{
IntPtr p = IntPtr.Add(ndi_sources, (i * SourceSizeInBytes));
NDIlib_source_t src = (NDIlib_source_t)System.Runtime.InteropServices.Marshal.PtrToStructure(p, typeof(NDIlib_source_t));
var ndiName = Ndi.Utf8ToString(src.p_ndi_name);
sources.Add(ndiName, src);
Debug.WriteLine($"Added source name:{Ndi.Utf8ToString(src.p_ndi_name)} address :{Ndi.Utf8ToString(src.p_ip_address)}");
}
// removing non-existing sources
var notExistingSources = _videoSources.Where(s => !(sources.ContainsKey(s) || s == Common.Properties.Resources._none_)).ToArray();
foreach (var source in notExistingSources)
{
_videoSources.Remove(source);
}
//adding new sources
foreach (var source in sources)
{
if (!_videoSources.Contains(source.Key))
{
_videoSources.Add(source.Key);
}
}
_ndiSources = sources;
}
}
}
protected void gridOrganisation_SortOrderCommand(object sender, Ndi.HelpDesk.WebControls.DataGridSortOrderCommandEventArgs e)
{
DataGrid dataGrid = (DataGrid)sender;
ShowGrid(dataGrid, 0, dataGrid.CurrentSortExpression, e.SortOrder);
}
