84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
/*
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* Copyright (c) 2016 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 MEDIA_BASE_VIDEO_SOURCE_BASE_H_
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#define MEDIA_BASE_VIDEO_SOURCE_BASE_H_
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#include <vector>
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#include "api/sequence_checker.h"
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#include "api/video/video_frame.h"
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#include "api/video/video_sink_interface.h"
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#include "api/video/video_source_interface.h"
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#include "rtc_base/system/no_unique_address.h"
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namespace rtc {
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// VideoSourceBase is not thread safe. Before using this class, consider using
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// VideoSourceBaseGuarded below instead, which is an identical implementation
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// but applies a sequence checker to help protect internal state.
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// TODO(bugs.webrtc.org/12780): Delete this class.
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class VideoSourceBase : public VideoSourceInterface<webrtc::VideoFrame> {
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public:
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VideoSourceBase();
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~VideoSourceBase() override;
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void AddOrUpdateSink(VideoSinkInterface<webrtc::VideoFrame>* sink,
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const VideoSinkWants& wants) override;
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void RemoveSink(VideoSinkInterface<webrtc::VideoFrame>* sink) override;
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protected:
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struct SinkPair {
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SinkPair(VideoSinkInterface<webrtc::VideoFrame>* sink, VideoSinkWants wants)
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: sink(sink), wants(wants) {}
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VideoSinkInterface<webrtc::VideoFrame>* sink;
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VideoSinkWants wants;
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};
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SinkPair* FindSinkPair(const VideoSinkInterface<webrtc::VideoFrame>* sink);
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const std::vector<SinkPair>& sink_pairs() const { return sinks_; }
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private:
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std::vector<SinkPair> sinks_;
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};
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// VideoSourceBaseGuarded assumes that operations related to sinks, occur on the
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// same TQ/thread that the object was constructed on.
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class VideoSourceBaseGuarded : public VideoSourceInterface<webrtc::VideoFrame> {
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public:
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VideoSourceBaseGuarded();
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~VideoSourceBaseGuarded() override;
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void AddOrUpdateSink(VideoSinkInterface<webrtc::VideoFrame>* sink,
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const VideoSinkWants& wants) override;
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void RemoveSink(VideoSinkInterface<webrtc::VideoFrame>* sink) override;
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protected:
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struct SinkPair {
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SinkPair(VideoSinkInterface<webrtc::VideoFrame>* sink, VideoSinkWants wants)
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: sink(sink), wants(wants) {}
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VideoSinkInterface<webrtc::VideoFrame>* sink;
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VideoSinkWants wants;
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};
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SinkPair* FindSinkPair(const VideoSinkInterface<webrtc::VideoFrame>* sink);
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const std::vector<SinkPair>& sink_pairs() const;
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// Keep the `source_sequence_` checker protected to allow sub classes the
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// ability to call Detach() if/when appropriate.
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RTC_NO_UNIQUE_ADDRESS webrtc::SequenceChecker source_sequence_;
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private:
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std::vector<SinkPair> sinks_ RTC_GUARDED_BY(&source_sequence_);
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};
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} // namespace rtc
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#endif // MEDIA_BASE_VIDEO_SOURCE_BASE_H_
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