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