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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_PROTOCOL_WEBRTC_FRAME_SCHEDULER_H_
#define REMOTING_PROTOCOL_WEBRTC_FRAME_SCHEDULER_H_
#include "base/callback_forward.h"
#include "base/memory/weak_ptr.h"
#include "remoting/codec/webrtc_video_encoder.h"
namespace remoting {
namespace protocol {
struct HostFrameStats;
class WebrtcDummyVideoEncoderFactory;
// An abstract interface for frame schedulers, which are responsible for
// scheduling when video frames are captured and for defining encoding
// parameters for each frame.
class WebrtcFrameScheduler {
public:
WebrtcFrameScheduler() {}
virtual ~WebrtcFrameScheduler() {}
// Starts the scheduler. |capture_callback| will be called whenever a new
// frame should be captured.
virtual void Start(WebrtcDummyVideoEncoderFactory* video_encoder_factory,
const base::Closure& capture_callback) = 0;
// Pause and resumes the scheduler.
virtual void Pause(bool pause) = 0;
// Called after |frame| has been captured to get encoding parameters for the
// frame. Returns false if the frame should be dropped (e.g. when there are no
// changes), true otherwise. |frame| may be set to nullptr if the capture
// request failed.
virtual bool OnFrameCaptured(const webrtc::DesktopFrame* frame,
WebrtcVideoEncoder::FrameParams* params_out) = 0;
// Called after a frame has been encoded and passed to the sender.
// |encoded_frame| may be nullptr. If |frame_stats| is not null then sets
// send_pending_delay, rtt_estimate and bandwidth_estimate_kbps fields.
virtual void OnFrameEncoded(
const WebrtcVideoEncoder::EncodedFrame* encoded_frame,
HostFrameStats* frame_stats) = 0;
};
} // namespace protocol
} // namespace remoting
#endif // REMOTING_PROTOCOL_WEBRTC_FRAME_SCHEDULER_H_
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