1.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2 3.. _V4L2-SDR-FMT-PCU18BE: 4 5****************************** 6V4L2_SDR_FMT_PCU18BE ('PC18') 7****************************** 8 9Planar complex unsigned 18-bit big endian IQ sample 10 11Description 12=========== 13 14This format contains a sequence of complex number samples. Each complex 15number consist of two parts called In-phase and Quadrature (IQ). Both I 16and Q are represented as a 18 bit unsigned big endian number stored in 1732 bit space. The remaining unused bits within the 32 bit space will be 18padded with 0. I value starts first and Q value starts at an offset 19equalling half of the buffer size (i.e.) offset = buffersize/2. Out of 20the 18 bits, bit 17:2 (16 bit) is data and bit 1:0 (2 bit) can be any 21value. 22 23**Byte Order.** 24Each cell is one byte. 25 26.. flat-table:: 27 :header-rows: 1 28 :stub-columns: 0 29 30 * - Offset: 31 - Byte B0 32 - Byte B1 33 - Byte B2 34 - Byte B3 35 * - start + 0: 36 - I'\ :sub:`0[17:10]` 37 - I'\ :sub:`0[9:2]` 38 - I'\ :sub:`0[1:0]; B2[5:0]=pad` 39 - pad 40 * - start + 4: 41 - I'\ :sub:`1[17:10]` 42 - I'\ :sub:`1[9:2]` 43 - I'\ :sub:`1[1:0]; B2[5:0]=pad` 44 - pad 45 * - ... 46 * - start + offset: 47 - Q'\ :sub:`0[17:10]` 48 - Q'\ :sub:`0[9:2]` 49 - Q'\ :sub:`0[1:0]; B2[5:0]=pad` 50 - pad 51 * - start + offset + 4: 52 - Q'\ :sub:`1[17:10]` 53 - Q'\ :sub:`1[9:2]` 54 - Q'\ :sub:`1[1:0]; B2[5:0]=pad` 55 - pad 56