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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef DOM_MEDIA_INTERVALS_H_
+#define DOM_MEDIA_INTERVALS_H_
+
+#include <algorithm>
+#include <type_traits>
+
+#include "nsTArray.h"
+#include "nsString.h"
+#include "nsPrintfCString.h"
+
+// Specialization for nsTArray CopyChooser.
+namespace mozilla::media {
+template <class T>
+class IntervalSet;
+class TimeUnit;
+} // namespace mozilla::media
+
+template <class E>
+struct nsTArray_RelocationStrategy<mozilla::media::IntervalSet<E>> {
+ typedef nsTArray_RelocateUsingMoveConstructor<mozilla::media::IntervalSet<E>>
+ Type;
+};
+
+namespace mozilla::media {
+
+/* Interval defines an interval between two points. Unlike a traditional
+ interval [A,B] where A <= x <= B, the upper boundary B is exclusive: A <= x <
+ B (e.g [A,B[ or [A,B) depending on where you're living) It provides basic
+ interval arithmetic and fuzzy edges. The type T must provides a default
+ constructor and +, -, <, <= and == operators.
+ */
+template <typename T>
+class Interval {
+ public:
+ typedef Interval<T> SelfType;
+
+ Interval() : mStart(T()), mEnd(T()), mFuzz(T()) {}
+
+ template <typename StartArg, typename EndArg>
+ Interval(StartArg&& aStart, EndArg&& aEnd)
+ : mStart(aStart), mEnd(aEnd), mFuzz() {
+ MOZ_DIAGNOSTIC_ASSERT(mStart <= mEnd, "Invalid Interval");
+ }
+
+ template <typename StartArg, typename EndArg, typename FuzzArg>
+ Interval(StartArg&& aStart, EndArg&& aEnd, FuzzArg&& aFuzz)
+ : mStart(aStart), mEnd(aEnd), mFuzz(aFuzz) {
+ MOZ_DIAGNOSTIC_ASSERT(mStart <= mEnd, "Invalid Interval");
+ }
+
+ Interval(const SelfType& aOther)
+ : mStart(aOther.mStart), mEnd(aOther.mEnd), mFuzz(aOther.mFuzz) {}
+
+ Interval(SelfType&& aOther)
+ : mStart(std::move(aOther.mStart)),
+ mEnd(std::move(aOther.mEnd)),
+ mFuzz(std::move(aOther.mFuzz)) {}
+
+ SelfType& operator=(const SelfType& aOther) {
+ mStart = aOther.mStart;
+ mEnd = aOther.mEnd;
+ mFuzz = aOther.mFuzz;
+ return *this;
+ }
+
+ SelfType& operator=(SelfType&& aOther) {
+ MOZ_ASSERT(&aOther != this, "self-moves are prohibited");
+ this->~Interval();
+ new (this) Interval(std::move(aOther));
+ return *this;
+ }
+
+ // Basic interval arithmetic operator definition.
+ SelfType operator+(const SelfType& aOther) const {
+ return SelfType(mStart + aOther.mStart, mEnd + aOther.mEnd,
+ mFuzz + aOther.mFuzz);
+ }
+
+ SelfType operator+(const T& aVal) const {
+ return SelfType(mStart + aVal, mEnd + aVal, mFuzz);
+ }
+
+ SelfType operator-(const SelfType& aOther) const {
+ return SelfType(mStart - aOther.mEnd, mEnd - aOther.mStart,
+ mFuzz + aOther.mFuzz);
+ }
+
+ SelfType operator-(const T& aVal) const {
+ return SelfType(mStart - aVal, mEnd - aVal, mFuzz);
+ }
+
+ SelfType& operator+=(const SelfType& aOther) {
+ mStart += aOther.mStart;
+ mEnd += aOther.mEnd;
+ mFuzz += aOther.mFuzz;
+ return *this;
+ }
+
+ SelfType& operator+=(const T& aVal) {
+ mStart += aVal;
+ mEnd += aVal;
+ return *this;
+ }
+
+ SelfType& operator-=(const SelfType& aOther) {
+ mStart -= aOther.mStart;
+ mEnd -= aOther.mEnd;
+ mFuzz += aOther.mFuzz;
+ return *this;
+ }
+
+ SelfType& operator-=(const T& aVal) {
+ mStart -= aVal;
+ mEnd -= aVal;
+ return *this;
+ }
+
+ bool operator==(const SelfType& aOther) const {
+ return mStart == aOther.mStart && mEnd == aOther.mEnd;
+ }
+
+ bool operator!=(const SelfType& aOther) const { return !(*this == aOther); }
+
+ bool Contains(const T& aX) const {
+ return mStart - mFuzz <= aX && aX < mEnd + mFuzz;
+ }
+
+ bool ContainsStrict(const T& aX) const { return mStart <= aX && aX < mEnd; }
+
+ bool ContainsWithStrictEnd(const T& aX) const {
+ return mStart - mFuzz <= aX && aX < mEnd;
+ }
+
+ bool Contains(const SelfType& aOther) const {
+ return (mStart - mFuzz <= aOther.mStart + aOther.mFuzz) &&
+ (aOther.mEnd - aOther.mFuzz <= mEnd + mFuzz);
+ }
+
+ bool ContainsStrict(const SelfType& aOther) const {
+ return mStart <= aOther.mStart && aOther.mEnd <= mEnd;
+ }
+
+ bool ContainsWithStrictEnd(const SelfType& aOther) const {
+ return (mStart - mFuzz <= aOther.mStart + aOther.mFuzz) &&
+ aOther.mEnd <= mEnd;
+ }
+
+ bool Intersects(const SelfType& aOther) const {
+ return (mStart - mFuzz < aOther.mEnd + aOther.mFuzz) &&
+ (aOther.mStart - aOther.mFuzz < mEnd + mFuzz);
+ }
+
+ bool IntersectsStrict(const SelfType& aOther) const {
+ return mStart < aOther.mEnd && aOther.mStart < mEnd;
+ }
+
+ // Same as Intersects, but including the boundaries.
+ bool Touches(const SelfType& aOther) const {
+ return (mStart - mFuzz <= aOther.mEnd + aOther.mFuzz) &&
+ (aOther.mStart - aOther.mFuzz <= mEnd + mFuzz);
+ }
+
+ // Returns true if aOther is strictly to the right of this and contiguous.
+ // This operation isn't commutative.
+ bool Contiguous(const SelfType& aOther) const {
+ return mEnd <= aOther.mStart &&
+ aOther.mStart - mEnd <= mFuzz + aOther.mFuzz;
+ }
+
+ bool RightOf(const SelfType& aOther) const {
+ return aOther.mEnd - aOther.mFuzz <= mStart + mFuzz;
+ }
+
+ bool LeftOf(const SelfType& aOther) const {
+ return mEnd - mFuzz <= aOther.mStart + aOther.mFuzz;
+ }
+
+ SelfType Span(const SelfType& aOther) const {
+ if (IsEmpty()) {
+ return aOther;
+ }
+ SelfType result(*this);
+ if (aOther.mStart < mStart) {
+ result.mStart = aOther.mStart;
+ }
+ if (mEnd < aOther.mEnd) {
+ result.mEnd = aOther.mEnd;
+ }
+ if (mFuzz < aOther.mFuzz) {
+ result.mFuzz = aOther.mFuzz;
+ }
+ return result;
+ }
+
+ SelfType Intersection(const SelfType& aOther) const {
+ const T& s = std::max(mStart, aOther.mStart);
+ const T& e = std::min(mEnd, aOther.mEnd);
+ const T& f = std::max(mFuzz, aOther.mFuzz);
+ if (s < e) {
+ return SelfType(s, e, f);
+ }
+ // Return an empty interval.
+ return SelfType();
+ }
+
+ T Length() const { return mEnd - mStart; }
+
+ bool IsEmpty() const { return mStart == mEnd; }
+
+ void SetFuzz(const T& aFuzz) { mFuzz = aFuzz; }
+
+ // Returns true if the two intervals intersect with this being on the right
+ // of aOther
+ bool TouchesOnRight(const SelfType& aOther) const {
+ return aOther.mStart <= mStart &&
+ (mStart - mFuzz <= aOther.mEnd + aOther.mFuzz) &&
+ (aOther.mStart - aOther.mFuzz <= mEnd + mFuzz);
+ }
+
+ // Returns true if the two intervals intersect with this being on the right
+ // of aOther, ignoring fuzz.
+ bool TouchesOnRightStrict(const SelfType& aOther) const {
+ return aOther.mStart <= mStart && mStart <= aOther.mEnd;
+ }
+
+ nsCString ToString() const {
+ if constexpr (std::is_same_v<T, TimeUnit>) {
+ return nsPrintfCString("[%s, %s](%s)", mStart.ToString().get(),
+ mEnd.ToString().get(), mFuzz.ToString().get());
+ } else if constexpr (std::is_same_v<T, double>) {
+ return nsPrintfCString("[%lf, %lf](%lf)", mStart, mEnd, mFuzz);
+ }
+ }
+
+ T mStart;
+ T mEnd;
+ T mFuzz;
+};
+
+// An IntervalSet in a collection of Intervals. The IntervalSet is always
+// normalized.
+template <typename T>
+class IntervalSet {
+ public:
+ typedef IntervalSet<T> SelfType;
+ typedef Interval<T> ElemType;
+ typedef AutoTArray<ElemType, 4> ContainerType;
+ typedef typename ContainerType::index_type IndexType;
+
+ IntervalSet() = default;
+ virtual ~IntervalSet() = default;
+
+ IntervalSet(const SelfType& aOther) : mIntervals(aOther.mIntervals.Clone()) {}
+
+ IntervalSet(SelfType&& aOther) {
+ mIntervals.AppendElements(std::move(aOther.mIntervals));
+ }
+
+ explicit IntervalSet(const ElemType& aOther) {
+ if (!aOther.IsEmpty()) {
+ mIntervals.AppendElement(aOther);
+ }
+ }
+
+ explicit IntervalSet(ElemType&& aOther) {
+ if (!aOther.IsEmpty()) {
+ mIntervals.AppendElement(std::move(aOther));
+ }
+ }
+
+ bool operator==(const SelfType& aOther) const {
+ return mIntervals == aOther.mIntervals;
+ }
+
+ bool operator!=(const SelfType& aOther) const {
+ return mIntervals != aOther.mIntervals;
+ }
+
+ SelfType& operator=(const SelfType& aOther) {
+ mIntervals = aOther.mIntervals.Clone();
+ return *this;
+ }
+
+ SelfType& operator=(SelfType&& aOther) {
+ MOZ_ASSERT(&aOther != this, "self-moves are prohibited");
+ this->~IntervalSet();
+ new (this) IntervalSet(std::move(aOther));
+ return *this;
+ }
+
+ SelfType& operator=(const ElemType& aInterval) {
+ mIntervals.Clear();
+ if (!aInterval.IsEmpty()) {
+ mIntervals.AppendElement(aInterval);
+ }
+ return *this;
+ }
+
+ SelfType& operator=(ElemType&& aInterval) {
+ mIntervals.Clear();
+ if (!aInterval.IsEmpty()) {
+ mIntervals.AppendElement(std::move(aInterval));
+ }
+ return *this;
+ }
+
+ SelfType& Add(const SelfType& aIntervals) {
+ if (aIntervals.mIntervals.Length() == 1) {
+ Add(aIntervals.mIntervals[0]);
+ } else {
+ mIntervals.AppendElements(aIntervals.mIntervals);
+ Normalize();
+ }
+ return *this;
+ }
+
+ SelfType& Add(const ElemType& aInterval) {
+ if (aInterval.IsEmpty()) {
+ return *this;
+ }
+ if (mIntervals.IsEmpty()) {
+ mIntervals.AppendElement(aInterval);
+ return *this;
+ }
+ ElemType& last = mIntervals.LastElement();
+ if (aInterval.TouchesOnRight(last)) {
+ last = last.Span(aInterval);
+ return *this;
+ }
+ // Most of our actual usage is adding an interval that will be outside the
+ // range. We can speed up normalization here.
+ if (aInterval.RightOf(last)) {
+ mIntervals.AppendElement(aInterval);
+ return *this;
+ }
+
+ ContainerType normalized;
+ ElemType current(aInterval);
+ IndexType i = 0;
+ for (; i < mIntervals.Length(); i++) {
+ ElemType& interval = mIntervals[i];
+ if (current.Touches(interval)) {
+ current = current.Span(interval);
+ } else if (current.LeftOf(interval)) {
+ break;
+ } else {
+ normalized.AppendElement(std::move(interval));
+ }
+ }
+ normalized.AppendElement(std::move(current));
+ for (; i < mIntervals.Length(); i++) {
+ normalized.AppendElement(std::move(mIntervals[i]));
+ }
+ mIntervals.Clear();
+ mIntervals.AppendElements(std::move(normalized));
+
+ return *this;
+ }
+
+ SelfType& operator+=(const SelfType& aIntervals) {
+ Add(aIntervals);
+ return *this;
+ }
+
+ SelfType& operator+=(const ElemType& aInterval) {
+ Add(aInterval);
+ return *this;
+ }
+
+ SelfType operator+(const SelfType& aIntervals) const {
+ SelfType intervals(*this);
+ intervals.Add(aIntervals);
+ return intervals;
+ }
+
+ SelfType operator+(const ElemType& aInterval) const {
+ SelfType intervals(*this);
+ intervals.Add(aInterval);
+ return intervals;
+ }
+
+ friend SelfType operator+(const ElemType& aInterval,
+ const SelfType& aIntervals) {
+ SelfType intervals;
+ intervals.Add(aInterval);
+ intervals.Add(aIntervals);
+ return intervals;
+ }
+
+ // Excludes an interval from an IntervalSet.
+ SelfType& operator-=(const ElemType& aInterval) {
+ if (aInterval.IsEmpty() || mIntervals.IsEmpty()) {
+ return *this;
+ }
+ if (mIntervals.Length() == 1 &&
+ mIntervals[0].TouchesOnRightStrict(aInterval)) {
+ // Fast path when we're removing from the front of a set with a
+ // single interval. This is common for the buffered time ranges
+ // we see on Twitch.
+ if (aInterval.mEnd >= mIntervals[0].mEnd) {
+ mIntervals.RemoveElementAt(0);
+ } else {
+ mIntervals[0].mStart = aInterval.mEnd;
+ mIntervals[0].mFuzz = std::max(mIntervals[0].mFuzz, aInterval.mFuzz);
+ }
+ return *this;
+ }
+
+ // General case performed by inverting aInterval within the bounds of
+ // mIntervals and then doing the intersection.
+ T firstEnd = std::max(mIntervals[0].mStart, aInterval.mStart);
+ T secondStart = std::min(mIntervals.LastElement().mEnd, aInterval.mEnd);
+ ElemType startInterval(mIntervals[0].mStart, firstEnd);
+ ElemType endInterval(secondStart, mIntervals.LastElement().mEnd);
+ SelfType intervals(std::move(startInterval));
+ intervals += std::move(endInterval);
+ return Intersection(intervals);
+ }
+
+ SelfType& operator-=(const SelfType& aIntervals) {
+ for (const auto& interval : aIntervals.mIntervals) {
+ *this -= interval;
+ }
+ return *this;
+ }
+
+ SelfType operator-(const SelfType& aInterval) const {
+ SelfType intervals(*this);
+ intervals -= aInterval;
+ return intervals;
+ }
+
+ SelfType operator-(const ElemType& aInterval) const {
+ SelfType intervals(*this);
+ intervals -= aInterval;
+ return intervals;
+ }
+
+ // Mutate this IntervalSet to be the union of this and aOther.
+ SelfType& Union(const SelfType& aOther) {
+ Add(aOther);
+ return *this;
+ }
+
+ SelfType& Union(const ElemType& aInterval) {
+ Add(aInterval);
+ return *this;
+ }
+
+ // Mutate this TimeRange to be the intersection of this and aOther.
+ SelfType& Intersection(const SelfType& aOther) {
+ ContainerType intersection;
+
+ // Ensure the intersection has enough capacity to store the upper bound on
+ // the intersection size. This ensures that we don't spend time reallocating
+ // the storage as we append, at the expense of extra memory.
+ intersection.SetCapacity(std::max(aOther.Length(), mIntervals.Length()));
+
+ const ContainerType& other = aOther.mIntervals;
+ IndexType i = 0, j = 0;
+ for (; i < mIntervals.Length() && j < other.Length();) {
+ if (mIntervals[i].IntersectsStrict(other[j])) {
+ intersection.AppendElement(mIntervals[i].Intersection(other[j]));
+ }
+ if (mIntervals[i].mEnd < other[j].mEnd) {
+ i++;
+ } else {
+ j++;
+ }
+ }
+ mIntervals = std::move(intersection);
+ return *this;
+ }
+
+ SelfType& Intersection(const ElemType& aInterval) {
+ SelfType intervals(aInterval);
+ return Intersection(intervals);
+ }
+
+ const ElemType& operator[](IndexType aIndex) const {
+ return mIntervals[aIndex];
+ }
+
+ // Returns the start boundary of the first interval. Or a default constructed
+ // T if IntervalSet is empty (and aExists if provided will be set to false).
+ T GetStart(bool* aExists = nullptr) const {
+ bool exists = !mIntervals.IsEmpty();
+
+ if (aExists) {
+ *aExists = exists;
+ }
+
+ if (exists) {
+ return mIntervals[0].mStart;
+ } else {
+ return T();
+ }
+ }
+
+ // Returns the end boundary of the last interval. Or a default constructed T
+ // if IntervalSet is empty (and aExists if provided will be set to false).
+ T GetEnd(bool* aExists = nullptr) const {
+ bool exists = !mIntervals.IsEmpty();
+ if (aExists) {
+ *aExists = exists;
+ }
+
+ if (exists) {
+ return mIntervals.LastElement().mEnd;
+ } else {
+ return T();
+ }
+ }
+
+ IndexType Length() const { return mIntervals.Length(); }
+
+ bool IsEmpty() const { return mIntervals.IsEmpty(); }
+
+ T Start(IndexType aIndex) const { return mIntervals[aIndex].mStart; }
+
+ T Start(IndexType aIndex, bool& aExists) const {
+ aExists = aIndex < mIntervals.Length();
+
+ if (aExists) {
+ return mIntervals[aIndex].mStart;
+ } else {
+ return T();
+ }
+ }
+
+ T End(IndexType aIndex) const { return mIntervals[aIndex].mEnd; }
+
+ T End(IndexType aIndex, bool& aExists) const {
+ aExists = aIndex < mIntervals.Length();
+
+ if (aExists) {
+ return mIntervals[aIndex].mEnd;
+ } else {
+ return T();
+ }
+ }
+
+ bool Contains(const ElemType& aInterval) const {
+ for (const auto& interval : mIntervals) {
+ if (interval.Contains(aInterval)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ bool ContainsStrict(const ElemType& aInterval) const {
+ for (const auto& interval : mIntervals) {
+ if (interval.ContainsStrict(aInterval)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ bool Contains(const T& aX) const {
+ for (const auto& interval : mIntervals) {
+ if (interval.Contains(aX)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ bool ContainsStrict(const T& aX) const {
+ for (const auto& interval : mIntervals) {
+ if (interval.ContainsStrict(aX)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ bool ContainsWithStrictEnd(const T& aX) const {
+ for (const auto& interval : mIntervals) {
+ if (interval.ContainsWithStrictEnd(aX)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ bool ContainsWithStrictEnd(const ElemType& aInterval) const {
+ for (const auto& interval : mIntervals) {
+ if (interval.ContainsWithStrictEnd(aInterval)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ bool Intersects(const ElemType& aInterval) const {
+ for (const auto& interval : mIntervals) {
+ if (interval.Intersects(aInterval)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ bool IntersectsStrict(const ElemType& aInterval) const {
+ for (const auto& interval : mIntervals) {
+ if (interval.IntersectsStrict(aInterval)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ // Returns if there's any intersection between this and aOther.
+ bool IntersectsStrict(const SelfType& aOther) const {
+ const ContainerType& other = aOther.mIntervals;
+ IndexType i = 0, j = 0;
+ for (; i < mIntervals.Length() && j < other.Length();) {
+ if (mIntervals[i].IntersectsStrict(other[j])) {
+ return true;
+ }
+ if (mIntervals[i].mEnd < other[j].mEnd) {
+ i++;
+ } else {
+ j++;
+ }
+ }
+ return false;
+ }
+
+ bool IntersectsWithStrictEnd(const ElemType& aInterval) const {
+ for (const auto& interval : mIntervals) {
+ if (interval.IntersectsWithStrictEnd(aInterval)) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ // Shift all values by aOffset.
+ SelfType& Shift(const T& aOffset) {
+ for (auto& interval : mIntervals) {
+ interval.mStart = interval.mStart + aOffset;
+ interval.mEnd = interval.mEnd + aOffset;
+ }
+ return *this;
+ }
+
+ void SetFuzz(const T& aFuzz) {
+ for (auto& interval : mIntervals) {
+ interval.SetFuzz(aFuzz);
+ }
+ MergeOverlappingIntervals();
+ }
+
+ static const IndexType NoIndex = IndexType(-1);
+
+ IndexType Find(const T& aValue) const {
+ for (IndexType i = 0; i < mIntervals.Length(); i++) {
+ if (mIntervals[i].Contains(aValue)) {
+ return i;
+ }
+ }
+ return NoIndex;
+ }
+
+ // Methods for range-based for loops.
+ typename ContainerType::iterator begin() { return mIntervals.begin(); }
+
+ typename ContainerType::const_iterator begin() const {
+ return mIntervals.begin();
+ }
+
+ typename ContainerType::iterator end() { return mIntervals.end(); }
+
+ typename ContainerType::const_iterator end() const {
+ return mIntervals.end();
+ }
+
+ ElemType& LastInterval() {
+ MOZ_ASSERT(!mIntervals.IsEmpty());
+ return mIntervals.LastElement();
+ }
+
+ const ElemType& LastInterval() const {
+ MOZ_ASSERT(!mIntervals.IsEmpty());
+ return mIntervals.LastElement();
+ }
+
+ void Clear() { mIntervals.Clear(); }
+
+ protected:
+ ContainerType mIntervals;
+
+ private:
+ void Normalize() {
+ if (mIntervals.Length() < 2) {
+ return;
+ }
+ mIntervals.Sort(CompareIntervals());
+ MergeOverlappingIntervals();
+ }
+
+ void MergeOverlappingIntervals() {
+ if (mIntervals.Length() < 2) {
+ return;
+ }
+
+ // This merges the intervals in place.
+ IndexType read = 0;
+ IndexType write = 0;
+ while (read < mIntervals.Length()) {
+ ElemType current(mIntervals[read]);
+ read++;
+ while (read < mIntervals.Length() && current.Touches(mIntervals[read])) {
+ current = current.Span(mIntervals[read]);
+ read++;
+ }
+ mIntervals[write] = current;
+ write++;
+ }
+ mIntervals.SetLength(write);
+ }
+
+ struct CompareIntervals {
+ bool Equals(const ElemType& aT1, const ElemType& aT2) const {
+ return aT1.mStart == aT2.mStart && aT1.mEnd == aT2.mEnd;
+ }
+
+ bool LessThan(const ElemType& aT1, const ElemType& aT2) const {
+ return aT1.mStart - aT1.mFuzz < aT2.mStart + aT2.mFuzz;
+ }
+ };
+};
+
+// clang doesn't allow for this to be defined inline of IntervalSet.
+template <typename T>
+IntervalSet<T> Union(const IntervalSet<T>& aIntervals1,
+ const IntervalSet<T>& aIntervals2) {
+ IntervalSet<T> intervals(aIntervals1);
+ intervals.Union(aIntervals2);
+ return intervals;
+}
+
+template <typename T>
+IntervalSet<T> Intersection(const IntervalSet<T>& aIntervals1,
+ const IntervalSet<T>& aIntervals2) {
+ IntervalSet<T> intersection(aIntervals1);
+ intersection.Intersection(aIntervals2);
+ return intersection;
+}
+
+} // namespace mozilla::media
+
+#endif // DOM_MEDIA_INTERVALS_H_
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