this patch adds a buffer len paramter to the receive_samples() call
that protects the (also) provided buffer from overflowing.
currently each call to srslte_ue_sync_zerocopy() which then calls receive_samples()
relies on a buffer that is "big enough". But that buffer is sometimes
2 subframes, sometimes 3 or 5, sometimes has space for the maximum PRB size, sometimes
only for 6 PRBs (i.e. during cell search).
By extending the interface to pass the buffer size we can make sure that
only samples are received that actually fit inside the provided buffer.
* Solved PHICH Segmentation fault for MIMO
* Initial Guru FFT optimitzation
* Guru (i)FFT implemented. All test passed!
* Integrated new DFT into pdsch_enodeb and pdsch_ue. Solved more DFT bugs.
* Solved Merge Errors and bugs
* Solved UL Guru bug (DC missing). Updated Init and OFDM calls for enb and ue (cell measurement too).
Andre Puschmann
Xavier Arteaga
Ismael Gomez
David Rupprecht
Xavier Arteaga