diff options
Diffstat (limited to 'host/lib/convert/convert_unpack_sc12.cpp')
| -rw-r--r-- | host/lib/convert/convert_unpack_sc12.cpp | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/host/lib/convert/convert_unpack_sc12.cpp b/host/lib/convert/convert_unpack_sc12.cpp new file mode 100644 index 000000000..f578b6c95 --- /dev/null +++ b/host/lib/convert/convert_unpack_sc12.cpp @@ -0,0 +1,152 @@ +// +// Copyright 2013 Ettus Research LLC +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program. If not, see <http://www.gnu.org/licenses/>. +// + +#include "convert_common.hpp" +#include <uhd/utils/byteswap.hpp> +#include <uhd/utils/msg.hpp> +#include <boost/math/special_functions/round.hpp> +#include <vector> + +using namespace uhd::convert; + +typedef boost::uint32_t (*tohost32_type)(boost::uint32_t); + +struct item32_sc12_3x +{ + item32_t line0; + item32_t line1; + item32_t line2; +}; + +template <typename type, tohost32_type tohost> +void convert_sc12_item32_3_to_star_4 +( + const item32_sc12_3x &input, + std::complex<type> &out0, + std::complex<type> &out1, + std::complex<type> &out2, + std::complex<type> &out3, + const double scalar +) +{ + //step 0: extract the lines from the input buffer + const item32_t line0 = tohost(input.line0); + const item32_t line1 = tohost(input.line1); + const item32_t line2 = tohost(input.line2); + const boost::uint64_t line01 = (boost::uint64_t(line0) << 32) | line1; + const boost::uint64_t line12 = (boost::uint64_t(line1) << 32) | line2; + + //step 1: shift out and mask off the individual numbers + const type i0 = type(boost::int16_t(line0 >> 16)*scalar); + const type q0 = type(boost::int16_t(line0 >> 4)*scalar); + + const type i1 = type(boost::int16_t(line01 >> 24)*scalar); + const type q1 = type(boost::int16_t(line1 >> 12)*scalar); + + const type i2 = type(boost::int16_t(line1 >> 0)*scalar); + const type q2 = type(boost::int16_t(line12 >> 20)*scalar); + + const type i3 = type(boost::int16_t(line2 >> 8)*scalar); + const type q3 = type(boost::int16_t(line2 << 4)*scalar); + + //step 2: load the outputs + out0 = std::complex<type>(i0, q0); + out1 = std::complex<type>(i1, q1); + out2 = std::complex<type>(i2, q2); + out3 = std::complex<type>(i3, q3); +} + +template <typename type, tohost32_type tohost> +struct convert_sc12_item32_1_to_star_1 : public converter +{ + convert_sc12_item32_1_to_star_1(void) + { + //NOP + } + + void set_scalar(const double scalar) + { + const int unpack_growth = 16; + _scalar = scalar/unpack_growth; + } + + void operator()(const input_type &inputs, const output_type &outputs, const size_t nsamps) + { + const item32_sc12_3x *input = reinterpret_cast<const item32_sc12_3x *>(size_t(inputs[0]) & ~0x3); + std::complex<type> *output = reinterpret_cast<std::complex<type> *>(outputs[0]); + + //helper variables + std::complex<type> dummy0, dummy1, dummy2; + size_t i = 0, o = 0; + + //handle the head case + const size_t head_samps = size_t(inputs[0]) & 0x3; + switch (head_samps) + { + case 0: break; //no head + case 1: convert_sc12_item32_3_to_star_4<type, tohost>(input[i++], dummy0, dummy1, dummy2, output[0], _scalar); break; + case 2: convert_sc12_item32_3_to_star_4<type, tohost>(input[i++], dummy0, dummy1, output[0], output[1], _scalar); break; + case 3: convert_sc12_item32_3_to_star_4<type, tohost>(input[i++], dummy0, output[0], output[1], output[2], _scalar); break; + } + o += head_samps; + + //convert the body + while (o+3 < nsamps) + { + convert_sc12_item32_3_to_star_4<type, tohost>(input[i], output[o+0], output[o+1], output[o+2], output[o+3], _scalar); + i++; o += 4; + } + + //handle the tail case + const size_t tail_samps = nsamps - o; + switch (tail_samps) + { + case 0: break; //no tail + case 1: convert_sc12_item32_3_to_star_4<type, tohost>(input[i], output[o+0], dummy0, dummy1, dummy2, _scalar); break; + case 2: convert_sc12_item32_3_to_star_4<type, tohost>(input[i], output[o+0], output[o+1], dummy1, dummy2, _scalar); break; + case 3: convert_sc12_item32_3_to_star_4<type, tohost>(input[i], output[o+0], output[o+1], output[o+2], dummy2, _scalar); break; + } + } + + double _scalar; +}; + +static converter::sptr make_convert_sc12_item32_le_1_to_fc32_1(void) +{ + return converter::sptr(new convert_sc12_item32_1_to_star_1<float, uhd::wtohx>()); +} + +static converter::sptr make_convert_sc12_item32_be_1_to_fc32_1(void) +{ + return converter::sptr(new convert_sc12_item32_1_to_star_1<float, uhd::ntohx>()); +} + +UHD_STATIC_BLOCK(register_convert_unpack_sc12) +{ + uhd::convert::register_bytes_per_item("sc12", 3/*bytes*/); + + uhd::convert::id_type id; + id.num_inputs = 1; + id.num_outputs = 1; + id.output_format = "fc32"; + + id.input_format = "sc12_item32_le"; + uhd::convert::register_converter(id, &make_convert_sc12_item32_le_1_to_fc32_1, PRIORITY_GENERAL); + + id.input_format = "sc12_item32_be"; + uhd::convert::register_converter(id, &make_convert_sc12_item32_be_1_to_fc32_1, PRIORITY_GENERAL); +} |