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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.
#ifndef REMOTING_PROTOCOL_WEBRTC_VIDEO_TRACK_SOURCE_H_
#define REMOTING_PROTOCOL_WEBRTC_VIDEO_TRACK_SOURCE_H_
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "remoting/codec/webrtc_video_encoder.h"
#include "third_party/webrtc/api/media_stream_interface.h"
#include "third_party/webrtc/api/notifier.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
#include <memory>
namespace remoting::protocol {
class WebrtcVideoTrackSource
: public webrtc::Notifier<webrtc::VideoTrackSourceInterface> {
public:
using AddSinkCallback =
base::RepeatingCallback<void(const webrtc::VideoSinkWants& wants)>;
// |add_sink_callback| is notified on the main thread whenever a sink is
// added or updated.
explicit WebrtcVideoTrackSource(AddSinkCallback add_sink_callback);
~WebrtcVideoTrackSource() override;
WebrtcVideoTrackSource(const WebrtcVideoTrackSource&) = delete;
WebrtcVideoTrackSource& operator=(const WebrtcVideoTrackSource&) = delete;
// VideoTrackSourceInterface implementation.
SourceState state() const override;
bool remote() const override;
bool is_screencast() const override;
std::optional<bool> needs_denoising() const override;
bool GetStats(Stats* stats) override;
void AddOrUpdateSink(webrtc::VideoSinkInterface<webrtc::VideoFrame>* sink,
const webrtc::VideoSinkWants& wants) override;
void RemoveSink(
webrtc::VideoSinkInterface<webrtc::VideoFrame>* sink) override;
bool SupportsEncodedOutput() const override;
void GenerateKeyFrame() override;
void AddEncodedSink(
webrtc::VideoSinkInterface<webrtc::RecordableEncodedFrame>* sink)
override;
void RemoveEncodedSink(
webrtc::VideoSinkInterface<webrtc::RecordableEncodedFrame>* sink)
override;
// Sends a captured frame to the sink if one was added. The |frame_stats|
// will be associated with the frame and will be attached to the output
// EncodedFrame.
void SendCapturedFrame(
std::unique_ptr<webrtc::DesktopFrame> desktop_frame,
std::unique_ptr<WebrtcVideoEncoder::FrameStats> frame_stats);
private:
raw_ptr<webrtc::VideoSinkInterface<webrtc::VideoFrame>> sink_ = nullptr;
AddSinkCallback add_sink_callback_;
scoped_refptr<base::SequencedTaskRunner> main_task_runner_;
// Incrementing ID to be attached to each VideoFrame, so that the
// encoder-wrapper can detect if a frame was dropped.
uint16_t frame_id_ = 0;
};
} // namespace remoting::protocol
#endif // REMOTING_PROTOCOL_WEBRTC_VIDEO_TRACK_SOURCE_H_
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