493a650b1e
On api level two methods were added to api/media_stream_interface.cc on VideoSourceInterface, GetLatency and SetLatency. Latency is measured in seconds, delay in milliseconds but both describes the same concept. Bug: webrtc:10287 Change-Id: Ib8dc62a4d73f63fab7e10b82c716096ee6199957 Reviewed-on: https://webrtc-review.googlesource.com/c/123482 Commit-Queue: Ruslan Burakov <kuddai@google.com> Reviewed-by: Stefan Holmer <stefan@webrtc.org> Reviewed-by: Philip Eliasson <philipel@webrtc.org> Reviewed-by: Steve Anton <steveanton@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26877}
54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
/*
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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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#ifndef PC_PLAYOUT_LATENCY_H_
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#define PC_PLAYOUT_LATENCY_H_
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#include <stdint.h>
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#include "absl/types/optional.h"
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#include "media/base/delayable.h"
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#include "pc/playout_latency_interface.h"
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#include "rtc_base/thread.h"
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namespace webrtc {
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// PlayoutLatency converts latency measured in seconds to delay measured in
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// milliseconds for the underlying media channel. It also handles cases when
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// user sets Latency before the start of media_channel by caching its request.
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// Note, this class is not thread safe. Its thread safe version is defined in
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// pc/playout_latency_proxy.h
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class PlayoutLatency : public PlayoutLatencyInterface {
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public:
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// Must be called on signaling thread.
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explicit PlayoutLatency(rtc::Thread* worker_thread);
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void OnStart(cricket::Delayable* media_channel, uint32_t ssrc) override;
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void OnStop() override;
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void SetLatency(double latency) override;
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double GetLatency() const override;
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private:
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// Throughout webrtc source, sometimes it is also called as |main_thread_|.
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rtc::Thread* const signaling_thread_;
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rtc::Thread* const worker_thread_;
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// Media channel and ssrc together uniqely identify audio stream.
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cricket::Delayable* media_channel_ = nullptr;
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absl::optional<uint32_t> ssrc_;
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absl::optional<double> cached_latency_;
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};
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} // namespace webrtc
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#endif // PC_PLAYOUT_LATENCY_H_
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