diff options
Diffstat (limited to 'host')
| -rw-r--r-- | host/lib/types/time_spec.cpp | 14 | ||||
| -rw-r--r-- | host/tests/time_spec_test.cpp | 29 |
2 files changed, 37 insertions, 6 deletions
diff --git a/host/lib/types/time_spec.cpp b/host/lib/types/time_spec.cpp index ec939e52e..2fce841be 100644 --- a/host/lib/types/time_spec.cpp +++ b/host/lib/types/time_spec.cpp @@ -1,5 +1,5 @@ // -// Copyright 2011-2012 Ettus Research LLC +// Copyright 2011-2013 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 @@ -16,7 +16,6 @@ // #include <uhd/types/time_spec.hpp> -#include <inttypes.h> //imaxdiv, intmax_t using namespace uhd; @@ -101,8 +100,9 @@ time_spec_t::time_spec_t(time_t full_secs, long tick_count, double tick_rate){ } time_spec_t time_spec_t::from_ticks(long long ticks, double tick_rate){ - const imaxdiv_t divres = imaxdiv(ticks, fast_llround(tick_rate)); - return time_spec_t(time_t(divres.quot), double(divres.rem)/tick_rate); + const time_t secs_full = time_t(ticks/tick_rate); + const double ticks_error = ticks - (secs_full*tick_rate); + return time_spec_t(secs_full, ticks_error/tick_rate); } /*********************************************************************** @@ -113,8 +113,10 @@ long time_spec_t::get_tick_count(double tick_rate) const{ } long long time_spec_t::to_ticks(double tick_rate) const{ - return fast_llround(this->get_frac_secs()*tick_rate) + \ - (this->get_full_secs() * fast_llround(tick_rate)); + const long long ticks_full = this->get_full_secs()*fast_llround(tick_rate); + const double secs_error = this->get_full_secs() - (ticks_full/tick_rate); + const double secs_frac = this->get_frac_secs() + secs_error; + return ticks_full + fast_llround(secs_frac*tick_rate); } double time_spec_t::get_real_secs(void) const{ diff --git a/host/tests/time_spec_test.cpp b/host/tests/time_spec_test.cpp index 102b7cda3..7dee95c5c 100644 --- a/host/tests/time_spec_test.cpp +++ b/host/tests/time_spec_test.cpp @@ -97,3 +97,32 @@ BOOST_AUTO_TEST_CASE(test_time_spec_neg_values){ BOOST_CHECK(tsa > tsb); BOOST_CHECK(tsc > tsd); } + +BOOST_AUTO_TEST_CASE(test_time_large_ticks_to_time_spec) +{ + std::cout << "sizeof(time_t) " << sizeof(time_t) << std::endl; + const boost::uint64_t ticks0 = boost::uint64_t(100e6*1360217663.739296); + const uhd::time_spec_t t0 = uhd::time_spec_t::from_ticks(ticks0, 100e6); + std::cout << "t0.get_real_secs() " << t0.get_real_secs() << std::endl; + std::cout << "t0.get_full_secs() " << t0.get_full_secs() << std::endl; + std::cout << "t0.get_frac_secs() " << t0.get_frac_secs() << std::endl; + BOOST_CHECK_EQUAL(t0.get_full_secs(), time_t(1360217663)); +} + +BOOST_AUTO_TEST_CASE(test_time_error_irrational_rate) +{ + static const double rate = 1625e3/6; + const long long tick_in = 23423436291667; + const uhd::time_spec_t ts = uhd::time_spec_t::from_ticks(tick_in, rate); + const long long tick_out = ts.to_ticks(rate); + const long long err = tick_in - tick_out; + + std::cout << std::setprecision(18); + std::cout << "time ............ " << ts.get_real_secs() << std::endl; + std::cout << "tick in ......... " << tick_in << std::endl; + std::cout << "tick out ........ " << tick_out << std::endl; + std::cout << "tick error ...... " << err << std::endl; + std::cout << std::endl; + + BOOST_CHECK_EQUAL(err, (long long)(0)); +} |