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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_MEDIA_TIMING_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_MEDIA_TIMING_H_
#include "third_party/blink/public/platform/web_url_request.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
namespace blink {
class KURL;
// This class is an abstract interface to the timing information needed to
// calculate LCP metrics for images and videos. It is intended to be implemented
// by concrete classes for each media type.
class MediaTiming : public GarbageCollectedMixin {
public:
// Request URL of the media resource content.
virtual const KURL& Url() const = 0;
virtual void SetIsSufficientContentLoadedForPaint() = 0;
// True if enough of the media resource content has been loaded to decode and
// display a frame. (The entire image for static media, and the first frame
// for animated media.)
virtual bool IsSufficientContentLoadedForPaint() const = 0;
// True if the Timing-Allow-Origin headers have been received and indicate
// that the timing information for this resource are allowed to be observed
// by its cross-origin embedder.
virtual bool TimingAllowPassed() const = 0;
// Returns the number of bytes of data used to represent the image (or to
// represent enough of the content that it can be displayed on screen.) This
// is used to approximate the entropy of the image so that very-low-entropy
// elements can be excluded from consideration for LCP.
virtual uint64_t ContentSizeForEntropy() const = 0;
// True if this is an animated image or video.
virtual bool IsAnimatedImage() const = 0;
// True if this is an animated image or video whose first frame has been
// decoded and rendered.
// TODO(iclelland): Change this so that it applies to static images as well.
virtual bool IsPaintedFirstFrame() const = 0;
virtual void SetFirstVideoFrameTime(base::TimeTicks) { NOTREACHED(); }
virtual base::TimeTicks GetFirstVideoFrameTime() const = 0;
// Returns the loading priority used for the image.
virtual std::optional<WebURLRequest::Priority> RequestPriority() const = 0;
virtual bool IsDataUrl() const = 0;
// Returns the type. For images it would be the specific types like jpg etc.
// For video, it would be video.
virtual AtomicString MediaType() const = 0;
virtual bool IsBroken() const = 0;
virtual base::TimeTicks DiscoveryTime() const = 0;
virtual base::TimeTicks LoadStart() const = 0;
virtual base::TimeTicks LoadEnd() const = 0;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_MEDIA_TIMING_H_
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