private unsafe byte[] ProcessCaptureData()
{
fixed(InteropVideodev2.V4l2FrameBuffer *buffers = &ApplyFrameBuffers()[0])
{
// Start data stream
InteropVideodev2.v4l2_buf_type type = InteropVideodev2.v4l2_buf_type.V4L2_BUF_TYPE_VIDEO_CAPTURE;
Interop.ioctl(_deviceFileDescriptor, InteropVideodev2.V4l2Request.VIDIOC_STREAMON, new IntPtr(&type));
byte[] dataBuffer = GetFrameData(buffers);
// Close data stream
Interop.ioctl(_deviceFileDescriptor, InteropVideodev2.V4l2Request.VIDIOC_STREAMOFF, new IntPtr(&type));
UnmappingFrameBuffers(buffers);
return(dataBuffer);
}
}
public override unsafe void CaptureContinuous(CancellationToken token)
{
_capturing = true;
fixed(InteropVideodev2.V4l2FrameBuffer *buffers = &ApplyFrameBuffers()[0])
{
// Start data stream
InteropVideodev2.v4l2_buf_type type = InteropVideodev2.v4l2_buf_type.V4L2_BUF_TYPE_VIDEO_CAPTURE;
Interop.ioctl(_deviceFileDescriptor, InteropVideodev2.V4l2Request.VIDIOC_STREAMON, new IntPtr(&type));
while (!token.IsCancellationRequested)
{
NewImageBufferReady?.Invoke(this, GetFrameDataPooled(buffers));
}
// Close data stream
Interop.ioctl(_deviceFileDescriptor, InteropVideodev2.V4l2Request.VIDIOC_STREAMOFF, new IntPtr(&type));
UnmappingFrameBuffers(buffers);
}
_capturing = false;
}
