[WebRTC --- source code articles] (two: two) video source VideoSourceBase

effect

This class inherits from the VideoSourceInterface<webrtc::VideoFrame> template class and can handle webrtc::VideoFrame

class VideoSourceBase : public VideoSourceInterface<webrtc::VideoFrame>

important member variables

struct SinkPair {
    SinkPair(VideoSinkInterface<webrtc::VideoFrame>* sink, VideoSinkWants wants)
        : sink(sink), wants(wants) {}
    VideoSinkInterface<webrtc::VideoFrame>* sink;//消费者
    VideoSinkWants wants;//视频帧属性来源
  };

std::vector<SinkPair> sinks_;//数据流消费者

important interface

SinkPair* FindSinkPair(const VideoSinkInterface<webrtc::VideoFrame>* sink);

Used to find out whether the current incoming sink is already in the data consumer column of the vector

VideoSourceBase::SinkPair* VideoSourceBase::FindSinkPair(
    const VideoSinkInterface<webrtc::VideoFrame>* sink) {
  auto sink_pair_it = absl::