6cd6d8ecfd
Adds new class DecodeSynchronizer that will coalesce the decoding of received streams on the metronome. This feature is experimental and is backed by a field trial WebRTC-FrameBuffer3. This experiment now has 3 arms to it, "WebRTC-FrameBuffer3/arm:FrameBuffer2/": Default, uses old frame buffer. "WebRTC-FrameBuffer3/arm:FrameBuffer3/": Uses new frame buffer. "WebRTC-FrameBuffer3/arm:SyncDecoding/": Uses new frame buffer with frame scheduled on the metronome. The SyncDecoding arm will not work until it is wired up in the follow-up CL. This change also makes the following modifications, * Adds FakeMetronome utilities for tests using a metronome. * Makes FrameDecodeScheduler an interface. The default implementation is TaskQueueFrameDecodeScheduler. * FrameDecodeScheduler now has a Stop() method, which must be called before destruction. TBR=philipel@webrtc.org Change-Id: I58a306bb883604b0be3eb2a04b3d07dbdf185c71 Bug: webrtc:13658 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/250665 Reviewed-by: Henrik Boström <hbos@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Stefan Holmer <holmer@google.com> Reviewed-by: Stefan Holmer <stefan@webrtc.org> Commit-Queue: Evan Shrubsole <eshr@webrtc.org> Cr-Commit-Position: refs/heads/main@{#35988}
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*
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* Copyright (c) 2022 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "video/task_queue_frame_decode_scheduler.h"
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#include <algorithm>
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#include <utility>
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#include "api/sequence_checker.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/task_utils/to_queued_task.h"
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namespace webrtc {
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TaskQueueFrameDecodeScheduler::TaskQueueFrameDecodeScheduler(
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Clock* clock,
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TaskQueueBase* const bookkeeping_queue)
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: clock_(clock), bookkeeping_queue_(bookkeeping_queue) {
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RTC_DCHECK(clock_);
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RTC_DCHECK(bookkeeping_queue_);
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}
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TaskQueueFrameDecodeScheduler::~TaskQueueFrameDecodeScheduler() {
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RTC_DCHECK(stopped_);
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RTC_DCHECK(!scheduled_rtp_) << "Outstanding scheduled rtp=" << *scheduled_rtp_
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<< ". Call CancelOutstanding before destruction.";
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}
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void TaskQueueFrameDecodeScheduler::ScheduleFrame(
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uint32_t rtp,
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FrameDecodeTiming::FrameSchedule schedule,
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FrameReleaseCallback cb) {
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RTC_DCHECK(!stopped_) << "Can not schedule frames after stopped.";
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RTC_DCHECK(!scheduled_rtp_.has_value())
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<< "Can not schedule two frames for release at the same time.";
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RTC_DCHECK(cb);
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scheduled_rtp_ = rtp;
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TimeDelta wait = std::max(
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TimeDelta::Zero(), schedule.latest_decode_time - clock_->CurrentTime());
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bookkeeping_queue_->PostDelayedTask(
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ToQueuedTask(task_safety_.flag(),
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[this, rtp, schedule, cb = std::move(cb)] {
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RTC_DCHECK_RUN_ON(bookkeeping_queue_);
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// If the next frame rtp has changed since this task was
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// this scheduled release should be skipped.
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if (scheduled_rtp_ != rtp)
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return;
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scheduled_rtp_ = absl::nullopt;
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cb(rtp, schedule.render_time);
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}),
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wait.ms());
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}
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void TaskQueueFrameDecodeScheduler::CancelOutstanding() {
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scheduled_rtp_ = absl::nullopt;
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}
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absl::optional<uint32_t>
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TaskQueueFrameDecodeScheduler::ScheduledRtpTimestamp() {
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return scheduled_rtp_;
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}
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void TaskQueueFrameDecodeScheduler::Stop() {
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CancelOutstanding();
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stopped_ = true;
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}
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} // namespace webrtc
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