68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
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/*
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* Copyright 2019 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 "pc/jitter_buffer_delay.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/location.h"
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#include "rtc_base/logging.h"
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#include "rtc_base/numerics/safe_conversions.h"
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#include "rtc_base/numerics/safe_minmax.h"
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#include "rtc_base/thread.h"
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#include "rtc_base/thread_checker.h"
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namespace {
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constexpr int kDefaultDelay = 0;
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constexpr int kMaximumDelayMs = 10000;
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} // namespace
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namespace webrtc {
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JitterBufferDelay::JitterBufferDelay(rtc::Thread* worker_thread)
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: signaling_thread_(rtc::Thread::Current()), worker_thread_(worker_thread) {
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RTC_DCHECK(worker_thread_);
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}
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void JitterBufferDelay::OnStart(cricket::Delayable* media_channel,
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uint32_t ssrc) {
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RTC_DCHECK_RUN_ON(signaling_thread_);
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media_channel_ = media_channel;
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ssrc_ = ssrc;
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// Trying to apply cached delay for the audio stream.
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if (cached_delay_seconds_) {
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Set(cached_delay_seconds_.value());
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}
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}
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void JitterBufferDelay::OnStop() {
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RTC_DCHECK_RUN_ON(signaling_thread_);
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// Assume that audio stream is no longer present.
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media_channel_ = nullptr;
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ssrc_ = absl::nullopt;
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}
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void JitterBufferDelay::Set(absl::optional<double> delay_seconds) {
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RTC_DCHECK_RUN_ON(worker_thread_);
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// TODO(kuddai) propagate absl::optional deeper down as default preference.
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int delay_ms =
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rtc::saturated_cast<int>(delay_seconds.value_or(kDefaultDelay) * 1000);
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delay_ms = rtc::SafeClamp(delay_ms, 0, kMaximumDelayMs);
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cached_delay_seconds_ = delay_seconds;
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if (media_channel_ && ssrc_) {
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media_channel_->SetBaseMinimumPlayoutDelayMs(ssrc_.value(), delay_ms);
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}
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}
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} // namespace webrtc
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