public void Start(SamplesAvailableDelegate callback)
{
int v4l2_r;
Console.WriteLine("Start");
Samplerate = _sampleRate; // set sampling rate
NativeMethods.v4l2_requestbuffers req = new NativeMethods.v4l2_requestbuffers();
req.count = 10; // nbuffers to driver
req.type = V4L2_BUF_TYPE_SDR_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
//v4l2_r = NativeMethods.v4l2_ioctl(_fd, CMD64_VIDIOC_REQBUFS, ref req);
v4l2_r = NativeMethods.ioctl(_fd, CMD64_VIDIOC_REQBUFS, ref req);
Console.WriteLine("CMD64_VIDIOC_REQBUFS v4l2_ioctl r = {0} req.count = {1}", v4l2_r, req.count);
// v4l2_mmap buffers
mmap_start = new IntPtr [req.count];
mmap_length = new UInt32 [req.count];
// mmap = new Mmap [req.count];
for (n_buffers = 0; n_buffers < req.count; n_buffers++)
{
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = n_buffers;
//v4l2_r = NativeMethods.v4l2_ioctl(_fd, CMD64_VIDIOC_QUERYBUF, ref buf);
v4l2_r = NativeMethods.ioctl(_fd, CMD64_VIDIOC_QUERYBUF, ref buf);
// mmap[n_buffers].length = buf.length;
// mmap[n_buffers].start = NativeMethods.v4l2_mmap(IntPtr.Zero, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, _fd, buf.m.offset);
mmap_length[n_buffers] = buf.length;
//mmap_start[n_buffers] = NativeMethods.v4l2_mmap(IntPtr.Zero, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, _fd, buf.m.offset);
mmap_start[n_buffers] = NativeMethods.mmap(IntPtr.Zero, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, _fd, buf.m.offset);
Console.WriteLine("CMD64_VIDIOC_QUERYBUF v4l2_ioctl r = {0} mmap_start[n_buffers] = {1}", v4l2_r, mmap_start[n_buffers]);
}
//Exchange a buffer with the driver
for (uint i = 0; i < n_buffers; i++)
{
//CLEAR(buf);
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
//v4l2_r = NativeMethods.v4l2_ioctl(_fd, CMD64_VIDIOC_QBUF, ref buf);
v4l2_r = NativeMethods.ioctl(_fd, CMD64_VIDIOC_QBUF, ref buf);
Console.WriteLine("CMD64_VIDIOC_QBUF v4l2_ioctl r = {0} buf.index = {1}", v4l2_r, buf.index);
}
// start streaming
int type = V4L2_BUF_TYPE_SDR_CAPTURE;
int *ptr = &type;
//v4l2_r = NativeMethods.v4l2_ioctl(_fd, CMD64_VIDIOC_STREAMON, (IntPtr)ptr);
v4l2_r = NativeMethods.ioctl(_fd, CMD64_VIDIOC_STREAMON, (IntPtr)ptr);
Console.WriteLine("CMD64_VIDIOC_STREAMON v4l2_ioctl r = {0}", v4l2_r);
_callback = callback;
// set device parameters here
streaming = true;
_sampleThread = new Thread(ReceiveData);
_sampleThread.Start();
}
public void Start(SamplesAvailableDelegate callback)
{
int v4l2_r;
Console.WriteLine("Start");
Samplerate = _sampleRate; // set sampling rate
NativeMethods.v4l2_requestbuffers req = new NativeMethods.v4l2_requestbuffers();
req.count = 10; // nbuffers to driver
req.type = V4L2_BUF_TYPE_SDR_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
//v4l2_r = NativeMethods.v4l2_ioctl(_fd, CMD64_VIDIOC_REQBUFS, ref req);
v4l2_r = NativeMethods.ioctl(_fd, CMD64_VIDIOC_REQBUFS, ref req);
Console.WriteLine("CMD64_VIDIOC_REQBUFS v4l2_ioctl r = {0} req.count = {1}", v4l2_r, req.count);
// v4l2_mmap buffers
mmap_start = new IntPtr [req.count];
mmap_length = new UInt32 [req.count];
// mmap = new Mmap [req.count];
for (n_buffers = 0; n_buffers < req.count; n_buffers++) {
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = n_buffers;
//v4l2_r = NativeMethods.v4l2_ioctl(_fd, CMD64_VIDIOC_QUERYBUF, ref buf);
v4l2_r = NativeMethods.ioctl(_fd, CMD64_VIDIOC_QUERYBUF, ref buf);
// mmap[n_buffers].length = buf.length;
// mmap[n_buffers].start = NativeMethods.v4l2_mmap(IntPtr.Zero, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, _fd, buf.m.offset);
mmap_length[n_buffers] = buf.length;
//mmap_start[n_buffers] = NativeMethods.v4l2_mmap(IntPtr.Zero, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, _fd, buf.m.offset);
mmap_start[n_buffers] = NativeMethods.mmap(IntPtr.Zero, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, _fd, buf.m.offset);
Console.WriteLine("CMD64_VIDIOC_QUERYBUF v4l2_ioctl r = {0} mmap_start[n_buffers] = {1}", v4l2_r, mmap_start[n_buffers]);
}
//Exchange a buffer with the driver
for (uint i = 0; i < n_buffers; i++) {
//CLEAR(buf);
buf.type = V4L2_BUF_TYPE_SDR_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
//v4l2_r = NativeMethods.v4l2_ioctl(_fd, CMD64_VIDIOC_QBUF, ref buf);
v4l2_r = NativeMethods.ioctl(_fd, CMD64_VIDIOC_QBUF, ref buf);
Console.WriteLine("CMD64_VIDIOC_QBUF v4l2_ioctl r = {0} buf.index = {1}", v4l2_r, buf.index);
}
// start streaming
int type = V4L2_BUF_TYPE_SDR_CAPTURE;
int *ptr = & type;
//v4l2_r = NativeMethods.v4l2_ioctl(_fd, CMD64_VIDIOC_STREAMON, (IntPtr)ptr);
v4l2_r = NativeMethods.ioctl(_fd, CMD64_VIDIOC_STREAMON, (IntPtr)ptr);
Console.WriteLine("CMD64_VIDIOC_STREAMON v4l2_ioctl r = {0}", v4l2_r);
_callback = callback;
// set device parameters here
streaming = true;
_sampleThread = new Thread(ReceiveData);
_sampleThread.Start();
}
