c20978e581
NOPRESUBMIT=True # cpplint errors that aren't caused by this CL. NOTRY=True NOTREECHECKS=True TBR=kwiberg@webrtc.org, kjellander@webrtc.org Bug: webrtc:7634 Change-Id: I3cca0fbaa807b563c95979cccd6d1bec32055f36 Reviewed-on: https://chromium-review.googlesource.com/562156 Commit-Queue: Edward Lemur <ehmaldonado@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#18919}
69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/*
|
|
* 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 WEBRTC_MEDIA_BASE_VIDEOBROADCASTER_H_
|
|
#define WEBRTC_MEDIA_BASE_VIDEOBROADCASTER_H_
|
|
|
|
#include <memory>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
#include "webrtc/api/video/video_frame.h"
|
|
#include "webrtc/media/base/videosinkinterface.h"
|
|
#include "webrtc/media/base/videosourcebase.h"
|
|
#include "webrtc/rtc_base/criticalsection.h"
|
|
#include "webrtc/rtc_base/thread_checker.h"
|
|
|
|
namespace rtc {
|
|
|
|
// VideoBroadcaster broadcast video frames to sinks and combines
|
|
// VideoSinkWants from its sinks. It does that by implementing
|
|
// rtc::VideoSourceInterface and rtc::VideoSinkInterface.
|
|
// Sinks must be added and removed on one and only one thread.
|
|
// Video frames can be broadcasted on any thread. I.e VideoBroadcaster::OnFrame
|
|
// can be called on any thread.
|
|
class VideoBroadcaster : public VideoSourceBase,
|
|
public VideoSinkInterface<webrtc::VideoFrame> {
|
|
public:
|
|
VideoBroadcaster();
|
|
void AddOrUpdateSink(VideoSinkInterface<webrtc::VideoFrame>* sink,
|
|
const VideoSinkWants& wants) override;
|
|
void RemoveSink(VideoSinkInterface<webrtc::VideoFrame>* sink) override;
|
|
|
|
// Returns true if the next frame will be delivered to at least one sink.
|
|
bool frame_wanted() const;
|
|
|
|
// Returns VideoSinkWants a source is requested to fulfill. They are
|
|
// aggregated by all VideoSinkWants from all sinks.
|
|
VideoSinkWants wants() const;
|
|
|
|
// This method ensures that if a sink sets rotation_applied == true,
|
|
// it will never receive a frame with pending rotation. Our caller
|
|
// may pass in frames without precise synchronization with changes
|
|
// to the VideoSinkWants.
|
|
void OnFrame(const webrtc::VideoFrame& frame) override;
|
|
|
|
protected:
|
|
void UpdateWants() EXCLUSIVE_LOCKS_REQUIRED(sinks_and_wants_lock_);
|
|
const rtc::scoped_refptr<webrtc::VideoFrameBuffer>& GetBlackFrameBuffer(
|
|
int width, int height)
|
|
EXCLUSIVE_LOCKS_REQUIRED(sinks_and_wants_lock_);
|
|
|
|
ThreadChecker thread_checker_;
|
|
rtc::CriticalSection sinks_and_wants_lock_;
|
|
|
|
VideoSinkWants current_wants_ GUARDED_BY(sinks_and_wants_lock_);
|
|
rtc::scoped_refptr<webrtc::VideoFrameBuffer> black_frame_buffer_;
|
|
};
|
|
|
|
} // namespace rtc
|
|
|
|
#endif // WEBRTC_MEDIA_BASE_VIDEOBROADCASTER_H_
|