chromium/third_party/blink/renderer/modules/mediastream/web_media_player_ms_compositor.h

// Copyright 2015 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_MODULES_MEDIASTREAM_WEB_MEDIA_PLAYER_MS_COMPOSITOR_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_WEB_MEDIA_PLAYER_MS_COMPOSITOR_H_

#include <stddef.h>

#include <map>
#include <memory>
#include <optional>
#include <vector>

#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/synchronization/lock.h"
#include "base/task/sequenced_task_runner.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "cc/layers/surface_layer.h"
#include "cc/layers/video_frame_provider.h"
#include "media/base/media_util.h"
#include "third_party/blink/public/platform/web_media_player.h"
#include "third_party/blink/public/platform/web_video_frame_submitter.h"
#include "third_party/blink/renderer/modules/mediastream/video_renderer_algorithm_wrapper.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/wtf/cross_thread_functional.h"

namespace base {
class SingleThreadTaskRunner;
class WaitableEvent;
}

namespace gfx {
class Size;
}

namespace media {
class VideoRendererAlgorithm;
}

namespace viz {
class SurfaceId;
}

namespace blink {
class MediaStreamDescriptor;
class WebMediaPlayerMS;

// This class is designed to handle the work load on compositor thread for
// WebMediaPlayerMS. It will be instantiated on the main thread, but destroyed
// on the thread holding the last reference.
//
// WebMediaPlayerMSCompositor utilizes VideoRendererAlgorithm to store the
// incoming frames and select the best frame for rendering to maximize the
// smoothness, if REFERENCE_TIMEs are populated for incoming VideoFrames.
// Otherwise, WebMediaPlayerMSCompositor will simply store the most recent
// frame, and submit it whenever asked by the compositor.
class MODULES_EXPORT WebMediaPlayerMSCompositor
    : public cc::VideoFrameProvider { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_WEB_MEDIA_PLAYER_MS_COMPOSITOR_H_