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

// Copyright 2014 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_VIDEO_TRACK_ADAPTER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_VIDEO_TRACK_ADAPTER_H_

#include <stdint.h>

#include <optional>

#include "base/functional/callback.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/single_thread_task_runner.h"
#include "base/time/time.h"
#include "media/base/video_frame.h"
#include "third_party/blink/public/platform/modules/mediastream/media_stream_types.h"
#include "third_party/blink/public/web/modules/mediastream/encoded_video_frame.h"
#include "third_party/blink/renderer/modules/mediastream/media_stream_video_track.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/wtf/cross_thread_functional.h"
#include "third_party/blink/renderer/platform/wtf/thread_safe_ref_counted.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
#include "third_party/webrtc_overrides/low_precision_timer.h"

namespace blink {

class VideoTrackAdapterSettings;

// VideoTrackAdapter is a helper class used by MediaStreamVideoSource used for
// adapting the video resolution from a source implementation to the resolution
// a track requires. Different tracks can have different resolution constraints.
// The constraints can be set as max width and height as well as max and min
// aspect ratio.
// Video frames are delivered to a track using a VideoCaptureDeliverFrameCB on
// the video task runner.
// Adaptations is done by wrapping the original media::VideoFrame in a new
// media::VideoFrame with a new visible_rect and natural_size.
class MODULES_EXPORT VideoTrackAdapter
    : public WTF::ThreadSafeRefCounted<VideoTrackAdapter> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_VIDEO_TRACK_ADAPTER_H_