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gnss-sdr/tests/unit-tests/signal-processing-blocks/sources/unpack_2bit_samples_test.cc

286 lines
8.3 KiB
C++

/*!
* \file unpack_2bit_samples_test.cc
* \brief This file implements unit tests for the unpack_2bit_samples
* custom block
* \author Cillian O'Driscoll, 2015. cillian.odriscoll (at) gmail.com
*
*
* -----------------------------------------------------------------------------
*
* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
* This file is part of GNSS-SDR.
*
* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
* SPDX-License-Identifier: GPL-3.0-or-later
*
* -----------------------------------------------------------------------------
*/
#include "unpack_2bit_samples.h"
#include <gnuradio/blocks/stream_to_vector.h>
#include <gnuradio/top_block.h>
#include <gtest/gtest.h>
#include <cstddef>
#ifdef GR_GREATER_38
#include <gnuradio/blocks/vector_sink.h>
#include <gnuradio/blocks/vector_source.h>
#else
#include <gnuradio/blocks/vector_sink_b.h>
#include <gnuradio/blocks/vector_source_b.h>
#include <gnuradio/blocks/vector_source_s.h>
#endif
std::vector<uint8_t> packData(std::vector<int8_t> const &raw_data,
bool big_endian)
{
std::vector<uint8_t> packed_data(raw_data.size() / 4);
int shift = (big_endian ? 6 : 0);
unsigned int j = 0;
for (signed char i : raw_data)
{
auto val = static_cast<unsigned>((i - 1) / 2 & 0x03);
packed_data[j] |= val << shift;
if (big_endian)
{
shift -= 2;
if (shift < 0)
{
shift = 6;
j++;
}
}
else
{
shift += 2;
if (shift > 6)
{
shift = 0;
j++;
}
}
}
return packed_data;
}
TEST(Unpack2bitSamplesTest, CheckBigEndianByte)
{
bool big_endian_bytes = true;
size_t item_size = 1;
bool big_endian_items = false;
std::vector<int8_t> raw_data = {-1, 3, 1, -1, -3, 1, 3, 1};
std::vector<uint8_t> packed_data = packData(raw_data, big_endian_bytes);
std::vector<uint8_t> unpacked_data;
gr::top_block_sptr top_block = gr::make_top_block("Unpack2bitSamplesTest");
gr::blocks::vector_source_b::sptr source =
gr::blocks::vector_source_b::make(packed_data);
auto unpacker =
make_unpack_2bit_samples(big_endian_bytes,
item_size,
big_endian_items);
gr::blocks::stream_to_vector::sptr stov =
gr::blocks::stream_to_vector::make(item_size, raw_data.size());
gr::blocks::vector_sink_b::sptr sink =
gr::blocks::vector_sink_b::make(raw_data.size());
top_block->connect(source, 0, unpacker, 0);
top_block->connect(unpacker, 0, stov, 0);
top_block->connect(stov, 0, sink, 0);
top_block->run();
top_block->stop();
unpacked_data = sink->data();
EXPECT_EQ(raw_data.size(), unpacked_data.size());
for (size_t i = 0; i < raw_data.size(); ++i)
{
EXPECT_EQ(raw_data[i], static_cast<int8_t>(unpacked_data[i]));
}
}
TEST(Unpack2bitSamplesTest, CheckLittleEndianByte)
{
bool big_endian_bytes = false;
size_t item_size = 1;
bool big_endian_items = false;
std::vector<int8_t> raw_data = {-1, 3, 1, -1, -3, 1, 3, 1};
std::vector<uint8_t> packed_data = packData(raw_data, big_endian_bytes);
std::vector<uint8_t> unpacked_data;
gr::top_block_sptr top_block = gr::make_top_block("Unpack2bitSamplesTest");
gr::blocks::vector_source_b::sptr source =
gr::blocks::vector_source_b::make(packed_data);
auto unpacker =
make_unpack_2bit_samples(big_endian_bytes,
item_size,
big_endian_items);
gr::blocks::stream_to_vector::sptr stov =
gr::blocks::stream_to_vector::make(item_size, raw_data.size());
gr::blocks::vector_sink_b::sptr sink =
gr::blocks::vector_sink_b::make(raw_data.size());
top_block->connect(source, 0, unpacker, 0);
top_block->connect(unpacker, 0, stov, 0);
top_block->connect(stov, 0, sink, 0);
top_block->run();
top_block->stop();
unpacked_data = sink->data();
EXPECT_EQ(raw_data.size(), unpacked_data.size());
for (size_t i = 0; i < raw_data.size(); ++i)
{
EXPECT_EQ(raw_data[i], static_cast<int8_t>(unpacked_data[i]));
}
}
TEST(Unpack2bitSamplesTest, CheckBigEndianShortBigEndianByte)
{
bool big_endian_bytes = true;
size_t item_size = 2;
bool big_endian_items = true;
std::vector<int8_t> raw_data = {-1, 3, 1, -1, -3, 1, 3, 1};
std::vector<uint8_t> packed_data = packData(raw_data, big_endian_bytes);
// change the order of each pair of bytes:
for (size_t ii = 0; ii < packed_data.size(); ii += item_size)
{
unsigned int kk = ii + item_size - 1;
unsigned int jj = ii;
while (kk > jj)
{
uint8_t tmp = packed_data[jj];
packed_data[jj] = packed_data[kk];
packed_data[kk] = tmp;
--kk;
++jj;
}
}
// Now create a new big endian buffer:
std::vector<int16_t> packed_data_short(
reinterpret_cast<int16_t *>(&packed_data[0]),
reinterpret_cast<int16_t *>(&packed_data[0]) + packed_data.size() / item_size);
std::vector<uint8_t> unpacked_data;
gr::top_block_sptr top_block = gr::make_top_block("Unpack2bitSamplesTest");
gr::blocks::vector_source_s::sptr source =
gr::blocks::vector_source_s::make(packed_data_short);
auto unpacker =
make_unpack_2bit_samples(big_endian_bytes,
item_size,
big_endian_items);
gr::blocks::stream_to_vector::sptr stov =
gr::blocks::stream_to_vector::make(1, raw_data.size());
gr::blocks::vector_sink_b::sptr sink =
gr::blocks::vector_sink_b::make(raw_data.size());
top_block->connect(source, 0, unpacker, 0);
top_block->connect(unpacker, 0, stov, 0);
top_block->connect(stov, 0, sink, 0);
top_block->run();
top_block->stop();
unpacked_data = sink->data();
EXPECT_EQ(raw_data.size(), unpacked_data.size());
for (size_t i = 0; i < raw_data.size(); ++i)
{
EXPECT_EQ(raw_data[i], static_cast<int8_t>(unpacked_data[i]));
}
}
TEST(Unpack2bitSamplesTest, CheckBigEndianShortLittleEndianByte)
{
bool big_endian_bytes = false;
size_t item_size = 2;
bool big_endian_items = true;
std::vector<int8_t> raw_data = {-1, 3, 1, -1, -3, 1, 3, 1};
std::vector<uint8_t> packed_data = packData(raw_data, big_endian_bytes);
// change the order of each pair of bytes:
for (size_t ii = 0; ii < packed_data.size(); ii += item_size)
{
unsigned int kk = ii + item_size - 1;
unsigned int jj = ii;
while (kk > jj)
{
uint8_t tmp = packed_data[jj];
packed_data[jj] = packed_data[kk];
packed_data[kk] = tmp;
--kk;
++jj;
}
}
// Now create a new big endian buffer:
std::vector<int16_t> packed_data_short(
reinterpret_cast<int16_t *>(&packed_data[0]),
reinterpret_cast<int16_t *>(&packed_data[0]) + packed_data.size() / item_size);
std::vector<uint8_t> unpacked_data;
gr::top_block_sptr top_block = gr::make_top_block("Unpack2bitSamplesTest");
gr::blocks::vector_source_s::sptr source =
gr::blocks::vector_source_s::make(packed_data_short);
auto unpacker =
make_unpack_2bit_samples(big_endian_bytes,
item_size,
big_endian_items);
gr::blocks::stream_to_vector::sptr stov =
gr::blocks::stream_to_vector::make(1, raw_data.size());
gr::blocks::vector_sink_b::sptr sink =
gr::blocks::vector_sink_b::make(raw_data.size());
top_block->connect(source, 0, unpacker, 0);
top_block->connect(unpacker, 0, stov, 0);
top_block->connect(stov, 0, sink, 0);
top_block->run();
top_block->stop();
unpacked_data = sink->data();
EXPECT_EQ(raw_data.size(), unpacked_data.size());
for (size_t i = 0; i < raw_data.size(); ++i)
{
EXPECT_EQ(raw_data[i], static_cast<int8_t>(unpacked_data[i]));
}
}