| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "cast/streaming/rtp_time.h" |
| |
| #include <chrono> |
| |
| #include "gtest/gtest.h" |
| #include "util/chrono_helpers.h" |
| |
| namespace openscreen { |
| namespace cast { |
| |
| // Tests that conversions between std::chrono durations and RtpTimeDelta are |
| // accurate. Note that this implicitly tests the conversions to/from |
| // RtpTimeTicks as well due to shared implementation. |
| TEST(RtpTimeDeltaTest, ConversionToAndFromDurations) { |
| constexpr int kTimebase = 48000; |
| |
| // Origin in both timelines is equivalent. |
| ASSERT_EQ(RtpTimeDelta(), RtpTimeDelta::FromTicks(0)); |
| ASSERT_EQ(RtpTimeDelta(), |
| RtpTimeDelta::FromDuration(microseconds(0), kTimebase)); |
| ASSERT_EQ(microseconds::zero(), |
| RtpTimeDelta::FromTicks(0).ToDuration<microseconds>(kTimebase)); |
| |
| // Conversions that are exact (i.e., do not require rounding). |
| ASSERT_EQ(RtpTimeDelta::FromTicks(480), |
| RtpTimeDelta::FromDuration(milliseconds(10), kTimebase)); |
| ASSERT_EQ(RtpTimeDelta::FromTicks(96000), |
| RtpTimeDelta::FromDuration(seconds(2), kTimebase)); |
| ASSERT_EQ(milliseconds(10), |
| RtpTimeDelta::FromTicks(480).ToDuration<microseconds>(kTimebase)); |
| ASSERT_EQ(seconds(2), |
| RtpTimeDelta::FromTicks(96000).ToDuration<microseconds>(kTimebase)); |
| |
| // Conversions that are approximate (i.e., are rounded). |
| for (int error_us = -3; error_us <= +3; ++error_us) { |
| ASSERT_EQ( |
| RtpTimeDelta::FromTicks(0), |
| RtpTimeDelta::FromDuration(microseconds(0 + error_us), kTimebase)); |
| ASSERT_EQ( |
| RtpTimeDelta::FromTicks(1), |
| RtpTimeDelta::FromDuration(microseconds(21 + error_us), kTimebase)); |
| ASSERT_EQ( |
| RtpTimeDelta::FromTicks(2), |
| RtpTimeDelta::FromDuration(microseconds(42 + error_us), kTimebase)); |
| ASSERT_EQ( |
| RtpTimeDelta::FromTicks(3), |
| RtpTimeDelta::FromDuration(microseconds(63 + error_us), kTimebase)); |
| ASSERT_EQ( |
| RtpTimeDelta::FromTicks(4), |
| RtpTimeDelta::FromDuration(microseconds(83 + error_us), kTimebase)); |
| ASSERT_EQ( |
| RtpTimeDelta::FromTicks(11200000000000), |
| RtpTimeDelta::FromDuration( |
| microseconds(INT64_C(233333333333333) + error_us), kTimebase)); |
| } |
| ASSERT_EQ(microseconds(21), |
| RtpTimeDelta::FromTicks(1).ToDuration<microseconds>(kTimebase)); |
| ASSERT_EQ(microseconds(42), |
| RtpTimeDelta::FromTicks(2).ToDuration<microseconds>(kTimebase)); |
| ASSERT_EQ(microseconds(63), |
| RtpTimeDelta::FromTicks(3).ToDuration<microseconds>(kTimebase)); |
| ASSERT_EQ(microseconds(83), |
| RtpTimeDelta::FromTicks(4).ToDuration<microseconds>(kTimebase)); |
| ASSERT_EQ(microseconds(INT64_C(233333333333333)), |
| RtpTimeDelta::FromTicks(11200000000000) |
| .ToDuration<microseconds>(kTimebase)); |
| } |
| |
| } // namespace cast |
| } // namespace openscreen |