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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/webcodecs/image_track.h"
#include "base/logging.h"
#include "third_party/blink/renderer/platform/image-decoders/image_animation.h"
namespace blink {
ImageTrack::ImageTrack(ImageTrackList* image_track_list,
wtf_size_t id,
uint32_t frame_count,
int repetition_count,
bool selected)
: id_(id),
image_track_list_(image_track_list),
frame_count_(frame_count),
repetition_count_(repetition_count),
selected_(selected) {}
ImageTrack::~ImageTrack() = default;
uint32_t ImageTrack::frameCount() const {
return frame_count_;
}
bool ImageTrack::animated() const {
return frame_count_ > 1 || repetition_count_ != kAnimationNone;
}
float ImageTrack::repetitionCount() const {
if (repetition_count_ == kAnimationNone ||
repetition_count_ == kAnimationLoopOnce) {
return 0;
}
if (repetition_count_ == kAnimationLoopInfinite)
return INFINITY;
return repetition_count_;
}
bool ImageTrack::selected() const {
return selected_;
}
void ImageTrack::setSelected(bool selected) {
if (selected == selected_)
return;
selected_ = selected;
// If the track has been disconnected, a JS ref on the object may still exist
// and trigger calls here. We should do nothing in this case.
if (image_track_list_)
image_track_list_->OnTrackSelectionChanged(id_);
}
void ImageTrack::UpdateTrack(uint32_t frame_count, int repetition_count) {
DCHECK(image_track_list_);
const bool was_animated = animated();
frame_count_ = frame_count;
repetition_count_ = repetition_count;
// Changes from still to animated are not allowed since they can cause sites
// to think there are no further frames to decode in the streaming case.
if (!was_animated)
DCHECK_EQ(was_animated, animated());
}
void ImageTrack::Trace(Visitor* visitor) const {
ScriptWrappable::Trace(visitor);
visitor->Trace(image_track_list_);
}
} // namespace blink
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