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-rw-r--r--dom/media/gtest/TestTimeUnit.cpp281
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diff --git a/dom/media/gtest/TestTimeUnit.cpp b/dom/media/gtest/TestTimeUnit.cpp
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "gtest/gtest.h"
+#include <algorithm>
+#include <vector>
+
+#include "TimeUnits.h"
+
+using namespace mozilla;
+using namespace mozilla::media;
+using TimeUnit = mozilla::media::TimeUnit;
+
+TEST(TimeUnit, BasicArithmetic)
+{
+ const TimeUnit a(1000, 44100);
+ {
+ TimeUnit b = a * 10;
+ EXPECT_EQ(b.mBase, 44100);
+ EXPECT_EQ(b.mTicks.value(), a.mTicks.value() * 10);
+ EXPECT_EQ(a * 10, b);
+ }
+ {
+ TimeUnit b = a / 10;
+ EXPECT_EQ(b.mBase, 44100);
+ EXPECT_EQ(b.mTicks.value(), a.mTicks.value() / 10);
+ EXPECT_EQ(a / 10, b);
+ }
+ {
+ TimeUnit b = TimeUnit(10, 44100);
+ b += a;
+ EXPECT_EQ(b.mBase, 44100);
+ EXPECT_EQ(b.mTicks.value(), a.mTicks.value() + 10);
+ EXPECT_EQ(b - a, TimeUnit(10, 44100));
+ }
+ {
+ TimeUnit b = TimeUnit(1010, 44100);
+ b -= a; // now 10
+ EXPECT_EQ(b.mBase, 44100);
+ EXPECT_EQ(b.mTicks.value(), 10);
+ EXPECT_EQ(a + b, TimeUnit(1010, 44100));
+ }
+ {
+ TimeUnit b = TimeUnit(4010, 44100);
+ TimeUnit c = b % a; // now 10
+ EXPECT_EQ(c.mBase, 44100);
+ EXPECT_EQ(c.mTicks.value(), 10);
+ }
+ {
+ // Adding 6s in nanoseconds (e.g. coming from script) to a typical number
+ // from an mp4, 9001 in base 90000
+ TimeUnit b = TimeUnit(6000000000, 1000000000);
+ TimeUnit c = TimeUnit(9001, 90000);
+ TimeUnit d = c + b;
+ EXPECT_EQ(d.mBase, 90000);
+ EXPECT_EQ(d.mTicks.value(), 549001);
+ }
+ {
+ // Subtracting 9001 in base 9000 from 6s in nanoseconds (e.g. coming from
+ // script), converting to back to base 9000.
+ TimeUnit b = TimeUnit(6000000000, 1000000000);
+ TimeUnit c = TimeUnit(9001, 90000);
+ TimeUnit d = (b - c).ToBase(90000);
+ EXPECT_EQ(d.mBase, 90000);
+ EXPECT_EQ(d.mTicks.value(), 530998);
+ }
+}
+
+TEST(TimeUnit, Base)
+{
+ {
+ TimeUnit a = TimeUnit::FromSeconds(1);
+ EXPECT_EQ(a.mTicks.value(), 1000000);
+ EXPECT_EQ(a.mBase, 1000000);
+ }
+ {
+ TimeUnit a = TimeUnit::FromMicroseconds(44100000000);
+ EXPECT_EQ(a.mTicks.value(), 44100000000);
+ EXPECT_EQ(a.mBase, 1000000);
+ }
+ {
+ TimeUnit a = TimeUnit::FromSeconds(6.0);
+ EXPECT_EQ(a.mTicks.value(), 6000000);
+ EXPECT_EQ(a.mBase, 1000000);
+ double error;
+ TimeUnit b = a.ToBase(90000, error);
+ EXPECT_EQ(error, 0);
+ EXPECT_EQ(b.mTicks.value(), 540000);
+ EXPECT_EQ(b.mBase, 90000);
+ }
+}
+
+TEST(TimeUnit, Rounding)
+{
+ int64_t usecs = 662617;
+ double seconds = TimeUnit::FromMicroseconds(usecs).ToSeconds();
+ TimeUnit fromSeconds = TimeUnit::FromSeconds(seconds);
+ EXPECT_EQ(fromSeconds.mTicks.value(), usecs);
+ // TimeUnit base is microseconds if not explicitly passed.
+ EXPECT_EQ(fromSeconds.mBase, 1000000);
+ EXPECT_EQ(fromSeconds.ToMicroseconds(), usecs);
+
+ seconds = 4.169470123;
+ int64_t nsecs = 4169470123;
+ EXPECT_EQ(TimeUnit::FromSeconds(seconds, 1e9).ToNanoseconds(), nsecs);
+ EXPECT_EQ(TimeUnit::FromSeconds(seconds, 1e9).ToMicroseconds(), nsecs / 1000);
+
+ seconds = 2312312.16947012;
+ nsecs = 2312312169470120;
+ EXPECT_EQ(TimeUnit::FromSeconds(seconds, 1e9).ToNanoseconds(), nsecs);
+ EXPECT_EQ(TimeUnit::FromSeconds(seconds, 1e9).ToMicroseconds(), nsecs / 1000);
+
+ seconds = 2312312.169470123;
+ nsecs = 2312312169470123;
+ // A double doesn't have enough precision to roundtrip this time value
+ // correctly in this base, but the number of microseconds is still correct.
+ // This value is about 142.5 days however.
+ // This particular calculation results in exactly 1ns of difference after
+ // roundtrip. Enable this after remoing the MOZ_CRASH in TimeUnit::FromSeconds
+ // EXPECT_EQ(TimeUnit::FromSeconds(seconds, 1e9).ToNanoseconds() - nsecs, 1);
+ EXPECT_EQ(TimeUnit::FromSeconds(seconds, 1e9).ToMicroseconds(), nsecs / 1000);
+}
+
+TEST(TimeUnit, Comparisons)
+{
+ TimeUnit a(0, 1e9);
+ TimeUnit b(1, 1e9);
+ TimeUnit c(1, 1e6);
+
+ EXPECT_GE(b, a);
+ EXPECT_GE(c, a);
+ EXPECT_GE(c, b);
+
+ EXPECT_GT(b, a);
+ EXPECT_GT(c, a);
+ EXPECT_GT(c, b);
+
+ EXPECT_LE(a, b);
+ EXPECT_LE(a, c);
+ EXPECT_LE(b, c);
+
+ EXPECT_LT(a, b);
+ EXPECT_LT(a, c);
+ EXPECT_LT(b, c);
+
+ // Equivalence of zero regardless of the base
+ TimeUnit d(0, 1);
+ TimeUnit e(0, 1000);
+ EXPECT_EQ(a, d);
+ EXPECT_EQ(a, e);
+
+ // Equivalence of time accross bases
+ TimeUnit f(1000, 1e9);
+ TimeUnit g(1, 1e6);
+ EXPECT_EQ(f, g);
+
+ // Comparisons with infinity, same base
+ TimeUnit h = TimeUnit::FromInfinity();
+ TimeUnit i = TimeUnit::Zero();
+ EXPECT_LE(i, h);
+ EXPECT_LT(i, h);
+ EXPECT_GE(h, i);
+ EXPECT_GT(h, i);
+
+ // Comparisons with infinity, different base
+ TimeUnit j = TimeUnit::FromInfinity();
+ TimeUnit k = TimeUnit::Zero(1000000);
+ EXPECT_LE(k, j);
+ EXPECT_LT(k, j);
+ EXPECT_GE(j, k);
+ EXPECT_GT(j, k);
+
+ // Comparison of very big numbers, different base that have a gcd that makes
+ // it easy to reduce, to test the fraction reduction code
+ TimeUnit l = TimeUnit(123123120000000, 1000000000);
+ TimeUnit m = TimeUnit(123123120000000, 1000);
+ EXPECT_LE(l, m);
+ EXPECT_LT(l, m);
+ EXPECT_GE(m, l);
+ EXPECT_GT(m, l);
+
+ // Comparison of very big numbers, different base that are co-prime: worst
+ // cast scenario.
+ TimeUnit n = TimeUnit(123123123123123, 1000000000);
+ TimeUnit o = TimeUnit(123123123123123, 1000000001);
+ EXPECT_LE(o, n);
+ EXPECT_LT(o, n);
+ EXPECT_GE(n, o);
+ EXPECT_GT(n, o);
+
+ // Values taken from a real website (this is about 53 years, Date.now() in
+ // 2023).
+ TimeUnit leftBound(74332508253360, 44100);
+ TimeUnit rightBound(74332508297392, 44100);
+ TimeUnit fuzz(250000, 1000000);
+ TimeUnit time(1685544404790205, 1000000);
+
+ EXPECT_LT(leftBound - fuzz, time);
+ EXPECT_GT(time, leftBound - fuzz);
+ EXPECT_GE(rightBound + fuzz, time);
+ EXPECT_LT(time, rightBound + fuzz);
+
+ TimeUnit zero = TimeUnit::Zero(); // default base 1e6
+ TimeUnit datenow(
+ 151737439364679,
+ 90000); // Also from `Date.now()` in a common base for an mp4
+ EXPECT_NE(zero, datenow);
+}
+
+TEST(TimeUnit, InfinityMath)
+{
+ // Operator plus/minus uses floating point behaviour for positive and
+ // negative infinity values, i.e.:
+ // posInf + posInf = inf
+ // posInf + negInf = -nan
+ // posInf + finite = inf
+ // posInf - posInf = -nan
+ // posInf - negInf = inf
+ // posInf - finite = inf
+ // negInf + negInf = -inf
+ // negInf + posInf = -nan
+ // negInf + finite = -inf
+ // negInf - negInf = -nan
+ // negInf - posInf = -inf
+ // negInf - finite = -inf
+ // finite + posInf = inf
+ // finite - posInf = -inf
+ // finite + negInf = -inf
+ // finite - negInf = inf
+
+ const TimeUnit posInf = TimeUnit::FromInfinity();
+ EXPECT_EQ(TimeUnit::FromSeconds(mozilla::PositiveInfinity<double>()), posInf);
+
+ const TimeUnit negInf = TimeUnit::FromNegativeInfinity();
+ EXPECT_EQ(TimeUnit::FromSeconds(mozilla::NegativeInfinity<double>()), negInf);
+
+ EXPECT_EQ(posInf + posInf, posInf);
+ EXPECT_FALSE((posInf + negInf).IsValid());
+ EXPECT_FALSE((posInf - posInf).IsValid());
+ EXPECT_EQ(posInf - negInf, posInf);
+ EXPECT_EQ(negInf + negInf, negInf);
+ EXPECT_FALSE((negInf + posInf).IsValid());
+ EXPECT_FALSE((negInf - negInf).IsValid());
+ EXPECT_EQ(negInf - posInf, negInf);
+
+ const TimeUnit finite = TimeUnit::FromSeconds(42.0);
+ EXPECT_EQ(posInf - finite, posInf);
+ EXPECT_EQ(posInf + finite, posInf);
+ EXPECT_EQ(negInf - finite, negInf);
+ EXPECT_EQ(negInf + finite, negInf);
+
+ EXPECT_EQ(finite + posInf, posInf);
+ EXPECT_EQ(finite - posInf, negInf);
+ EXPECT_EQ(finite + negInf, negInf);
+ EXPECT_EQ(finite - negInf, posInf);
+}
+
+TEST(TimeUnit, BaseConversion)
+{
+ const int64_t packetSize = 1024; // typical for AAC
+ int64_t sampleRates[] = {16000, 44100, 48000, 88200, 96000};
+ const double hnsPerSeconds = 10000000.;
+ for (auto sampleRate : sampleRates) {
+ int64_t frameCount = 0;
+ TimeUnit pts;
+ do {
+ // Compute a time in hundreds of nanoseconds based of frame count, typical
+ // on Windows platform, checking that it round trips properly.
+ int64_t hns = AssertedCast<int64_t>(
+ std::round(hnsPerSeconds * static_cast<double>(frameCount) /
+ static_cast<double>(sampleRate)));
+ pts = TimeUnit::FromHns(hns, sampleRate);
+ EXPECT_EQ(
+ AssertedCast<int64_t>(std::round(pts.ToSeconds() * hnsPerSeconds)),
+ hns);
+ frameCount += packetSize;
+ } while (pts.ToSeconds() < 36000);
+ }
+}
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