private (LocalAudioSourceCapability[] caps, bool success) GetCapabilities(DsDevice device)
{
Log.Information($"Audio ({device.Name}): Getting Caps");
var list = new List <LocalAudioSourceCapability>();
bool failed = false;
IntPtr pCaps = IntPtr.Zero;
IFilterGraph2 filterGraph2 = null;
IBaseFilter sourceFilter = null;
IAMStreamConfig streamConfig = null;
object pin = null;
int count = 0;
int size = 0;
try
{
filterGraph2 = new FilterGraph() as IFilterGraph2;
if (filterGraph2 == null)
{
throw new NotSupportedException("filter2 is null");
}
LocalVideoSourceManager.AddCaptureFilter(filterGraph2, device, out sourceFilter);
pin = DsFindPin.ByCategory(sourceFilter, PinCategory.Capture, 0);
if (pin == null)
{
Log.Information($"Audio ({device.Name}): First pin is null");
pin = sourceFilter;
}
streamConfig = pin as IAMStreamConfig;
if (streamConfig == null)
{
throw new NotSupportedException("pin is null");
}
LocalVideoSourceManager.Checked(() => streamConfig.GetNumberOfCapabilities(out count, out size), "GetNumberOfCapabilities", null);
if (count <= 0)
{
throw new NotSupportedException("This video source does not report capabilities.");
}
if (size != Marshal.SizeOf(typeof(AudioStreamConfigCaps)))
{
throw new NotSupportedException("Unable to retrieve video source capabilities. This video source requires a larger VideoStreamConfigCaps structure.");
}
// Alloc memory for structure
pCaps = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(AudioStreamConfigCaps)));
for (int i = 0; i < count; i++)
{
AMMediaType mediaType = null;
LocalVideoSourceManager.Checked(() => streamConfig.GetStreamCaps(i, out mediaType, pCaps), "GetStreamCaps", null);
AudioStreamConfigCaps caps = (AudioStreamConfigCaps)Marshal.PtrToStructure(pCaps, typeof(AudioStreamConfigCaps));
var result = new LocalAudioSourceCapability()
{
MinimumChannels = caps.MinimumChannels,
MaximumChannels = caps.MaximumChannels,
MinimumSampleFrequency = caps.MinimumSampleFrequency,
MaximumSampleFrequency = caps.MaximumSampleFrequency
};
list.Add(result);
}
}
catch (Exception e)
{
Log.Error(e, $"Error during retreiving caps for '{device.Name}'");
failed = true;
}
finally
{
if (pCaps != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pCaps);
}
}
Log.Information($"Audio ({device.Name}): Releasing");
try
{
LocalVideoSourceManager.ReleaseComObject(sourceFilter);
LocalVideoSourceManager.ReleaseComObject(filterGraph2);
LocalVideoSourceManager.ReleaseComObject(streamConfig);
LocalVideoSourceManager.ReleaseComObject(pin);
}
catch (Exception e)
{
Log.Error(e, $"ReleaseComObject({device.Name}) failed");
}
Log.Information($"Caps {device.Name}: Count: {list.Count}/{count}, Str={size} ({string.Join("; ", list.Where(s => !s.IsStandart()).Select(s => s.ToString()))})");
return(list.ToArray(), !failed);
}
public int BufferCB(double SampleTime, IntPtr pBuffer, int BufferLen)
{
DateTime now = DateTime.UtcNow;
if ((now - _last).TotalMilliseconds > 150) // just to avoid issues with bad cameras
{
_last = now;
try
{
if (_width == 0)
{
var mediaType = new AMMediaType();
_grabber.GetConnectedMediaType(mediaType);
LocalVideoSourceManager.GetMediaTypeInfo(mediaType, out _height, out _width, out var _, out var _, out var _);
if (_width == 0 || _height == 0)
{
throw new InvalidOperationException($"Unable to GetMediaTypeInfo");
}
}
if (_getFrames)
{
BitmapSource image = BitmapSource.Create(
_width,
_height,
96,
96,
PixelFormats.Bgr24,
null,
pBuffer,
BufferLen,
_width * 3);
JpegBitmapEncoder encoder = new JpegBitmapEncoder {
QualityLevel = _width > 500 ? 30 : 50
};
encoder.Frames.Add(BitmapFrame.Create(image));
_stream.Position = 0;
encoder.Save(_stream);
var buffer = new byte[_stream.Position];
Array.Copy(_stream.GetBuffer(), buffer, _stream.Position);
_callback(new VideoInputPreview
{
Data = buffer,
W = _width,
H = _height
});
}
else
{
_callback(null);
}
}
catch (Exception e)
{
Log.Warning(e, $"Grabbing of '{_name}' failed");
}
}
return(0);
}
private (LocalVideoSourceCapability[] caps, InputDeviceState state) GetCapabilities(DsDevice device)
{
if (_initialLogging)
{
Log.Information($"Caps {device.Name}: getting");
}
var list = new List <LocalVideoSourceCapability>();
IntPtr pCaps = IntPtr.Zero;
IFilterGraph2 filterGraph2 = null;
IBaseFilter sourceFilter = null;
IAMStreamConfig streamConfig = null;
object pin = null;
InputDeviceState state = InputDeviceState.Ready;
try
{
filterGraph2 = new FilterGraph() as IFilterGraph2;
if (filterGraph2 == null)
{
throw new NotSupportedException("filter2 is null");
}
LocalVideoSourceManager.AddCaptureFilter(filterGraph2, device, out sourceFilter);
pin = DsFindPin.ByCategory(sourceFilter, PinCategory.Capture, 0);
if (pin == null)
{
pin = sourceFilter;
}
streamConfig = pin as IAMStreamConfig;
if (streamConfig == null)
{
throw new NotSupportedException("pin is null");
}
int count = 0;
int size = 0;
Checked(() => streamConfig.GetNumberOfCapabilities(out count, out size), "GetNumberOfCapabilities", null);
if (count <= 0)
{
throw new NotSupportedException("This video source does not report capabilities.");
}
if (size != Marshal.SizeOf(typeof(VideoStreamConfigCaps)))
{
throw new NotSupportedException("Unable to retrieve video source capabilities. This video source requires a larger VideoStreamConfigCaps structure.");
}
// Alloc memory for structure
pCaps = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(VideoStreamConfigCaps)));
for (int i = 0; i < count; i++)
{
AMMediaType mediaType = null;
Checked(() => streamConfig.GetStreamCaps(i, out mediaType, pCaps), "GetStreamCaps", null);
VideoStreamConfigCaps caps = (VideoStreamConfigCaps)Marshal.PtrToStructure(pCaps, typeof(VideoStreamConfigCaps));
var format = GetMediaTypeInfo(mediaType, out var height, out var width, out var compression, out var videoInfoHeader, out var videoInfoHeader2);
var result = new LocalVideoSourceCapability()
{
MaxF = GetFps(caps.MinFrameInterval),
MinF = GetFps(caps.MaxFrameInterval),
Fmt = format,
W = width,
H = height,
};
list.Add(result);
}
}
catch (UnauthorizedAccessException e)
{
Log.Warning(e, $"Error during retreiving caps for '{device.Name}' (Locked)");
state = InputDeviceState.Locked;
}
catch (Exception e)
{
Log.Error(e, $"Error during retreiving caps for '{device.Name}'");
state = InputDeviceState.Failed;
}
finally
{
if (pCaps != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(pCaps);
}
}
try
{
ReleaseComObject(sourceFilter);
ReleaseComObject(filterGraph2);
ReleaseComObject(streamConfig);
ReleaseComObject(pin);
}
catch (Exception e)
{
Log.Error(e, $"ReleaseComObject('{device.Name}') failed");
}
if (_initialLogging)
{
Log.Information($"Caps {device.Name}: {string.Join("; ", list.Select(s => s.ToString()))}");
}
return(list.ToArray(), state);
}
