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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.
*/
#include "video/task_queue_frame_decode_scheduler.h"
#include <algorithm>
#include <utility>
#include "api/sequence_checker.h"
#include "api/task_queue/task_queue_base.h"
#include "rtc_base/checks.h"
namespace webrtc {
TaskQueueFrameDecodeScheduler::TaskQueueFrameDecodeScheduler(
Clock* clock,
TaskQueueBase* const bookkeeping_queue)
: clock_(clock), bookkeeping_queue_(bookkeeping_queue) {
RTC_DCHECK(clock_);
RTC_DCHECK(bookkeeping_queue_);
}
TaskQueueFrameDecodeScheduler::~TaskQueueFrameDecodeScheduler() {
RTC_DCHECK(stopped_);
RTC_DCHECK(!scheduled_rtp_) << "Outstanding scheduled rtp=" << *scheduled_rtp_
<< ". Call CancelOutstanding before destruction.";
}
void TaskQueueFrameDecodeScheduler::ScheduleFrame(
uint32_t rtp,
FrameDecodeTiming::FrameSchedule schedule,
FrameReleaseCallback cb) {
//RTC_DCHECK(!stopped_) << "Can not schedule frames after stopped.";
RTC_DCHECK(!scheduled_rtp_.has_value())
<< "Can not schedule two frames for release at the same time.";
RTC_DCHECK(cb);
scheduled_rtp_ = rtp;
TimeDelta wait = std::max(
TimeDelta::Zero(), schedule.latest_decode_time - clock_->CurrentTime());
bookkeeping_queue_->PostDelayedHighPrecisionTask(
SafeTask(task_safety_.flag(),
[this, rtp, schedule, cb = std::move(cb)]() mutable {
RTC_DCHECK_RUN_ON(bookkeeping_queue_);
// If the next frame rtp has changed since this task was
// this scheduled release should be skipped.
if (scheduled_rtp_ != rtp)
return;
scheduled_rtp_ = absl::nullopt;
std::move(cb)(rtp, schedule.render_time);
}),
wait);
}
void TaskQueueFrameDecodeScheduler::CancelOutstanding() {
scheduled_rtp_ = absl::nullopt;
}
absl::optional<uint32_t>
TaskQueueFrameDecodeScheduler::ScheduledRtpTimestamp() {
return scheduled_rtp_;
}
void TaskQueueFrameDecodeScheduler::Stop() {
CancelOutstanding();
stopped_ = true;
}
} // namespace webrtc