66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
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/*
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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 WEBRTC_MEDIA_BASE_VIDEOBROADCASTER_H_
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#define WEBRTC_MEDIA_BASE_VIDEOBROADCASTER_H_
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#include <memory>
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#include <utility>
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#include <vector>
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#include "webrtc/base/criticalsection.h"
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#include "webrtc/base/thread_checker.h"
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#include "webrtc/media/base/videoframe.h"
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#include "webrtc/media/base/videosinkinterface.h"
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#include "webrtc/media/base/videosourcebase.h"
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#include "webrtc/media/engine/webrtcvideoframe.h"
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namespace rtc {
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// VideoBroadcaster broadcast video frames to sinks and combines
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// VideoSinkWants from its sinks. It does that by implementing
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// rtc::VideoSourceInterface and rtc::VideoSinkInterface.
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// Sinks must be added and removed on one and only one thread.
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// Video frames can be broadcasted on any thread. I.e VideoBroadcaster::OnFrame
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// can be called on any thread.
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class VideoBroadcaster : public VideoSourceBase,
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public VideoSinkInterface<cricket::VideoFrame> {
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public:
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VideoBroadcaster();
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void AddOrUpdateSink(VideoSinkInterface<cricket::VideoFrame>* sink,
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const VideoSinkWants& wants) override;
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void RemoveSink(VideoSinkInterface<cricket::VideoFrame>* sink) override;
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// Returns true if the next frame will be delivered to at least one sink.
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bool frame_wanted() const;
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// Returns VideoSinkWants a source is requested to fulfill. They are
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// aggregated by all VideoSinkWants from all sinks.
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VideoSinkWants wants() const;
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void OnFrame(const cricket::VideoFrame& frame) override;
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protected:
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void UpdateWants() EXCLUSIVE_LOCKS_REQUIRED(sinks_and_wants_lock_);
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const rtc::scoped_refptr<webrtc::VideoFrameBuffer>& GetBlackFrameBuffer(
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int width, int height)
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EXCLUSIVE_LOCKS_REQUIRED(sinks_and_wants_lock_);
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ThreadChecker thread_checker_;
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rtc::CriticalSection sinks_and_wants_lock_;
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VideoSinkWants current_wants_ GUARDED_BY(sinks_and_wants_lock_);
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rtc::scoped_refptr<webrtc::VideoFrameBuffer> black_frame_buffer_;
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};
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} // namespace rtc
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#endif // WEBRTC_MEDIA_BASE_VIDEOBROADCASTER_H_
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