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