Reading IQ data samples using libbladeRF library

[ninja-hu]

I am working with a bladeRF 2.0 micro xA4, details below:

bladeRF> info

  Board:                    Nuand bladeRF 2.0 (bladerf2)
  Serial #:                 55a30137bc6c4713824c46b2e3baf1e4
  VCTCXO DAC calibration:   0x1f0b
  FPGA size:                49 KLE
  FPGA loaded:              yes
  Flash size:               32 Mbit
  USB bus:                  6
  USB address:              4
  USB speed:                SuperSpeed
  Backend:                  libusb
  Instance:                 0

bladeRF> version

  bladeRF-cli version:        1.8.0-git-c8320f71-ppafocal
  libbladeRF version:         2.2.1-git-c8320f71-ppafocal

  Firmware version:           2.3.1
  FPGA version:               0.11.0 (configured by USB host)

I am also using the tutorial code here : https://nuand.com/bladeRF-doc/libbladeRF/v2.2.1/index.html to access the samples using libbladeRF. Most of the code is similar, with two differences:

a) I need to get the signal simultaneously for both the channels. Hence I using configure_channel to configure both the channels and then in the bladerf_sync_config, I use BLADERF_RX_X2.

b) To get the IQ data of a sample for both the channels, I run the following part of the code:

    status = bladerf_enable_module(dev, BLADERF_RX, true);

    /* Receive samples. This call leads to busy wait*/
    status = bladerf_sync_rx(dev, rx_samples, samples_len, NULL, 5000);
 
    /* Disable RX, shutting down our underlying RX stream */
    status = bladerf_enable_module(dev, BLADERF_RX, false);
 
    //Read data from the rx_samples buffer.
    std::vector<std::vector<int16_t>> csi_data;
    std::cout << sizeof(int16_t) << std::endl;

    for (int j=0; j<samples_len/num_channels;j++)
    {
        std::vector<int16_t> temp (4,0);
        int16_t inBytes16, out;

        memcpy(&inBytes16, init_pointer, 1*sizeof(int16_t)); // I_1
        temp[0] = inBytes16;
        init_pointer+=1;
        
        memcpy(&inBytes16, init_pointer, 1*sizeof(int16_t)); // Q_1
        temp[1] = inBytes16;
        init_pointer+=1;

        memcpy(&inBytes16, init_pointer, 1*sizeof(int16_t)); // I_2
        temp[2] = inBytes16;
        init_pointer+=1;

        memcpy(&inBytes16, init_pointer, 1*sizeof(int16_t)); // Q_2
        temp[3] = inBytes16;
        init_pointer+=1;

        csi_data.push_back(temp);
        // exit(1);
    }

Basically, temp need to store [I0[j], Q0[j], I1[j], Q1[j]] for any jth sample. However I am unsure whether this is the correct way to read data from the rx_samples buffer. As per the doc here, buffer stores Q value in the first 2 bytes and then the I value. Does this refer to the internal buffer or the user buffer? Is there a better way to read data from the buffer? I have also attached the entire code file that I am using, for reference.

Thanks! blade_rf_test.txt