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fb71392d00
Timestamp Offset calculations are now done exclusively by the Media Source components which allow to recalculate them on the fly. By abstracting those offsets it remove the need for the sub-decoders to handle them (which allows to add WebM support).
113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_TimeRanges_h_
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#define mozilla_dom_TimeRanges_h_
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#include "nsIDOMTimeRanges.h"
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#include "nsISupports.h"
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#include "nsTArray.h"
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#include "nsWrapperCache.h"
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#include "mozilla/ErrorResult.h"
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#include "nsAutoPtr.h"
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namespace mozilla {
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namespace dom {
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class TimeRanges;
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}
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namespace dom {
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// Implements media TimeRanges:
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// http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#timeranges
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class TimeRanges MOZ_FINAL : public nsIDOMTimeRanges
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIDOMTIMERANGES
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TimeRanges();
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void Add(double aStart, double aEnd);
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// Returns the start time of the first range, or -1 if no ranges exist.
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double GetStartTime();
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// Returns the end time of the last range, or -1 if no ranges exist.
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double GetEndTime();
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// See http://www.whatwg.org/html/#normalized-timeranges-object
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void Normalize(double aTolerance = 0.0);
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// Mutate this TimeRange to be the union of this and aOtherRanges.
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void Union(const TimeRanges* aOtherRanges, double aTolerance);
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// Mutate this TimeRange to be the intersection of this and aOtherRanges.
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void Intersection(const TimeRanges* aOtherRanges);
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bool WrapObject(JSContext* aCx, JS::MutableHandle<JSObject*> aReflector);
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uint32_t Length() const
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{
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return mRanges.Length();
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}
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virtual double Start(uint32_t aIndex, ErrorResult& aRv);
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virtual double End(uint32_t aIndex, ErrorResult& aRv);
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// Shift all values by aOffset seconds.
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void Shift(double aOffset);
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private:
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~TimeRanges();
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// Comparator which orders TimeRanges by start time. Used by Normalize().
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struct TimeRange
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{
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TimeRange(double aStart, double aEnd)
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: mStart(aStart),
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mEnd(aEnd) {}
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double mStart;
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double mEnd;
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};
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struct CompareTimeRanges
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{
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bool Equals(const TimeRange& aTr1, const TimeRange& aTr2) const {
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return aTr1.mStart == aTr2.mStart && aTr1.mEnd == aTr2.mEnd;
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}
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bool LessThan(const TimeRange& aTr1, const TimeRange& aTr2) const {
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return aTr1.mStart < aTr2.mStart;
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}
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};
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nsAutoTArray<TimeRange,4> mRanges;
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public:
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typedef nsTArray<TimeRange>::index_type index_type;
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static const index_type NoIndex = index_type(-1);
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index_type Find(double aTime, double aTolerance = 0);
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bool Contains(double aStart, double aEnd) {
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index_type target = Find(aStart);
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if (target == NoIndex) {
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return false;
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}
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return mRanges[target].mEnd >= aEnd;
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}
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_TimeRanges_h_
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