зеркало из https://github.com/mozilla/gecko-dev.git
93 строки
2.7 KiB
C++
93 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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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#include "mozilla/dom/VideoTrack.h"
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#include "mozilla/dom/VideoTrackList.h"
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#include "mozilla/dom/VideoTrackListBinding.h"
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namespace mozilla {
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namespace dom {
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JSObject*
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VideoTrackList::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return VideoTrackListBinding::Wrap(aCx, this, aGivenProto);
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}
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VideoTrack*
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VideoTrackList::operator[](uint32_t aIndex)
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{
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MediaTrack* track = MediaTrackList::operator[](aIndex);
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return track->AsVideoTrack();
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}
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void
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VideoTrackList::RemoveTrack(const RefPtr<MediaTrack>& aTrack)
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{
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// we need to find the video track before |MediaTrackList::RemoveTrack|. Or
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// mSelectedIndex will not be valid. The check of mSelectedIndex == -1
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// need to be done after RemoveTrack. Also the call of
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// |MediaTrackList::RemoveTrack| is necessary even when mSelectedIndex = -1.
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bool found;
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VideoTrack* selectedVideoTrack = IndexedGetter(mSelectedIndex, found);
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MediaTrackList::RemoveTrack(aTrack);
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if (mSelectedIndex == -1) {
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// There was no selected track and we don't select another track on removal.
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return;
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}
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MOZ_ASSERT(found, "When mSelectedIndex is set it should point to a track");
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MOZ_ASSERT(selectedVideoTrack, "The mSelectedIndex should be set to video track only");
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// Let the caller of RemoveTrack deal with choosing the new selected track if
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// it removes the currently-selected track.
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if (aTrack == selectedVideoTrack) {
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mSelectedIndex = -1;
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return;
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}
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// The removed track was not the selected track and there is a
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// currently-selected video track. We need to find the new location of the
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// selected track.
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for (size_t ix = 0; ix < mTracks.Length(); ix++) {
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if (mTracks[ix] == selectedVideoTrack) {
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mSelectedIndex = ix;
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return;
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}
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}
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}
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void
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VideoTrackList::EmptyTracks()
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{
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mSelectedIndex = -1;
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MediaTrackList::EmptyTracks();
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}
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VideoTrack* VideoTrackList::GetSelectedTrack()
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{
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if (mSelectedIndex < 0 || static_cast<size_t>(mSelectedIndex) >= mTracks.Length()) {
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return nullptr;
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}
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return operator[](mSelectedIndex);
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}
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VideoTrack*
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VideoTrackList::IndexedGetter(uint32_t aIndex, bool& aFound)
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{
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MediaTrack* track = MediaTrackList::IndexedGetter(aIndex, aFound);
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return track ? track->AsVideoTrack() : nullptr;
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}
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VideoTrack*
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VideoTrackList::GetTrackById(const nsAString& aId)
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{
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MediaTrack* track = MediaTrackList::GetTrackById(aId);
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return track ? track->AsVideoTrack() : nullptr;
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}
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} // namespace dom
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} // namespace mozilla
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