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/*
* Copyright (c) 2022 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef VIDEO_FRAME_DECODE_SCHEDULER_H_
#define VIDEO_FRAME_DECODE_SCHEDULER_H_
#include <stdint.h>
#include "absl/functional/any_invocable.h"
#include "absl/types/optional.h"
#include "api/units/timestamp.h"
#include "video/frame_decode_timing.h"
namespace webrtc {
class FrameDecodeScheduler {
public:
// Invoked when a frame with `rtp_timestamp` is ready for decoding.
using FrameReleaseCallback =
absl::AnyInvocable<void(uint32_t rtp_timestamp,
Timestamp render_time) &&>;
virtual ~FrameDecodeScheduler() = default;
// Returns the rtp timestamp of the next frame scheduled for release, or
// `nullopt` if no frame is currently scheduled.
virtual absl::optional<uint32_t> ScheduledRtpTimestamp() = 0;
// Schedules a frame for release based on `schedule`. When released,
// `callback` will be invoked with the `rtp` timestamp of the frame and the
// `render_time`
virtual void ScheduleFrame(uint32_t rtp,
FrameDecodeTiming::FrameSchedule schedule,
FrameReleaseCallback callback) = 0;
// Cancels all scheduled frames.
virtual void CancelOutstanding() = 0;
// Stop() Must be called before destruction.
virtual void Stop() = 0;
};
} // namespace webrtc
#endif // VIDEO_FRAME_DECODE_SCHEDULER_H_
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