【owt】addon.MediaStream，erizo::MediaStream 还有addon.MediaXXX,erizo::MediaXXX

9. MediaStream 和erizo::MediaStream 类的继承关系

erizo::MediaStream

source/agent/webrtc/rtcConn/erizo/src/erizo/MediaStream.h

source/agent/webrtc/rtcConn/erizo/src/erizo/MediaDefinitions.h

erizo::MediaSource

source/agent/webrtc/rtcConn/erizo/src/erizo/MediaDefinitions.h

/*** A MediaSource is any class that produces audio or video data.*/
class MediaSource: public virtual Monitor {protected:// SSRCs coming from the sourceuint32_t audio_source_ssrc_;std::vector<uint32_t> video_source_ssrc_list_;MediaSink* video_sink_;MediaSink* audio_sink_;MediaSink* event_sink_;// can it accept feedbackFeedbackSink* source_fb_sink_;public:void setAudioSink(MediaSink* audio_sink) {boost::mutex::scoped_lock lock(monitor_mutex_);this->audio_sink_ = audio_sink;}void setVideoSink(MediaSink* video_sink) {boost::mutex::scoped_lock lock(monitor_mutex_);this->video_sink_ = video_sink;}void setEventSink(MediaSink* event_sink) {boost::mutex::scoped_lock lock(monitor_mutex_);this->event_sink_ = event_sink;}FeedbackSink* getFeedbackSink() {boost::mutex::scoped_lock lock(monitor_mutex_);return source_fb_sink_;}virtual int sendPLI() = 0;uint32_t getVideoSourceSSRC() {boost::mutex::scoped_lock lock(monitor_mutex_);if (video_source_ssrc_list_.empty()) {return 0;}return video_source_ssrc_list_[0];}void setVideoSourceSSRC(uint32_t ssrc) {boost::mutex::scoped_lock lock(monitor_mutex_);if (video_source_ssrc_list_.empty()) {video_source_ssrc_list_.push_back(ssrc);return;}video_source_ssrc_list_[0] = ssrc;}std::vector<uint32_t> getVideoSourceSSRCList() {boost::mutex::scoped_lock lock(monitor_mutex_);return video_source_ssrc_list_;  //  return by copy to avoid concurrent access}void setVideoSourceSSRCList(const std::vector<uint32_t>& new_ssrc_list) {boost::mutex::scoped_lock lock(monitor_mutex_);video_source_ssrc_list_ = new_ssrc_list;}uint32_t getAudioSourceSSRC() {boost::mutex::scoped_lock lock(monitor_mutex_);return audio_source_ssrc_;}void setAudioSourceSSRC(uint32_t ssrc) {boost::mutex::scoped_lock lock(monitor_mutex_);audio_source_ssrc_ = ssrc;}bool isVideoSourceSSRC(uint32_t ssrc) {auto found_ssrc = std::find_if(video_source_ssrc_list_.begin(), video_source_ssrc_list_.end(),[ssrc](uint32_t known_ssrc) {return known_ssrc == ssrc;});return (found_ssrc != video_source_ssrc_list_.end());}bool isAudioSourceSSRC(uint32_t ssrc) {return audio_source_ssrc_ == ssrc;}MediaSource() : audio_source_ssrc_{0}, video_source_ssrc_list_{std::vector<uint32_t>(1, 0)},video_sink_{nullptr}, audio_sink_{nullptr}, event_sink_{nullptr}, source_fb_sink_{nullptr} {}virtual ~MediaSource() {}virtual void close() = 0;
};

erizo::MediaSink

source/agent/webrtc/rtcConn/erizo/src/erizo/MediaDefinitions.h

/** A MediaSink*/
class MediaSink: public virtual Monitor {protected:// SSRCs received by the SINKuint32_t audio_sink_ssrc_;uint32_t video_sink_ssrc_;// Is it able to provide FeedbackFeedbackSource* sink_fb_source_;public:int deliverAudioData(std::shared_ptr<DataPacket> data_packet) {return this->deliverAudioData_(data_packet);}int deliverVideoData(std::shared_ptr<DataPacket> data_packet) {return this->deliverVideoData_(data_packet);}uint32_t getVideoSinkSSRC() {boost::mutex::scoped_lock lock(monitor_mutex_);return video_sink_ssrc_;}void setVideoSinkSSRC(uint32_t ssrc) {boost::mutex::scoped_lock lock(monitor_mutex_);video_sink_ssrc_ = ssrc;}uint32_t getAudioSinkSSRC() {boost::mutex::scoped_lock lock(monitor_mutex_);return audio_sink_ssrc_;}void setAudioSinkSSRC(uint32_t ssrc) {boost::mutex::scoped_lock lock(monitor_mutex_);audio_sink_ssrc_ = ssrc;}bool isVideoSinkSSRC(uint32_t ssrc) {return ssrc == video_sink_ssrc_;}bool isAudioSinkSSRC(uint32_t ssrc) {return ssrc == audio_sink_ssrc_;}FeedbackSource* getFeedbackSource() {boost::mutex::scoped_lock lock(monitor_mutex_);return sink_fb_source_;}int deliverEvent(MediaEventPtr event) {return this->deliverEvent_(event);}MediaSink() : audio_sink_ssrc_{0}, video_sink_ssrc_{0}, sink_fb_source_{nullptr} {}virtual ~MediaSink() {}virtual void close() = 0;private:virtual int deliverAudioData_(std::shared_ptr<DataPacket> data_packet) = 0;virtual int deliverVideoData_(std::shared_ptr<DataPacket> data_packet) = 0;virtual int deliverEvent_(MediaEventPtr event) = 0;
};

erizo::FeedbackSink

source/agent/webrtc/rtcConn/erizo/src/erizo/MediaDefinitions.h

class FeedbackSink {public:virtual ~FeedbackSink() {}int deliverFeedback(std::shared_ptr<DataPacket> data_packet) {return this->deliverFeedback_(data_packet);}private:virtual int deliverFeedback_(std::shared_ptr<DataPacket> data_packet) = 0;
};

erizo::FeedbackSource

source/agent/webrtc/rtcConn/erizo/src/erizo/MediaDefinitions.h

class FeedbackSource {protected:FeedbackSink* fb_sink_;public:FeedbackSource(): fb_sink_{nullptr} {}virtual ~FeedbackSource() {}void setFeedbackSink(FeedbackSink* sink) {fb_sink_ = sink;}
};

addon.MediaStream

source/agent/webrtc/rtcConn/MediaStream.h

class MediaStream : public MediaFilter, public erizo::MediaStreamStatsListener, public erizo::MediaStreamEventListener {public:
...
}

addon.MediaFilter

source/core/owt_base/MediaWrapper.h

/** Wrapper class of both erizo::MediaSink and erizo::MediaSource*/
class MediaFilter : public Nan::ObjectWrap {public:erizo::MediaSink* msink;erizo::MediaSource* msource;
};

addon.MediaSource

source/core/owt_base/MediaWrapper.h

/** Wrapper class of erizo::MediaSource*/
class MediaSource : public Nan::ObjectWrap {public:erizo::MediaSource* msource;
};

addon.MediaSink

source/core/owt_base/MediaWrapper.h

class MediaSink : public Nan::ObjectWrap {public:erizo::MediaSink* msink;
};