跨平台接口实现方案djinni

该工程的位置在：https://github.com/dropbox/djinni

现在分析djinni接口的优点和缺点：

   优点：可以编写一份idl 文件生成所有平台的接口。

   缺点：性能不高，数据使用std::vector<int8_t> 拷贝导致性能有很大损失。

具体demo可以参考：

@import "media.djinni"    //引入其它idl 文件

@import "comm.djinni"

sdk_vendor = enum {    //定义枚举类型

  TENCENT;

  AGORA;

  HUAWEI;

  ZEGO;

}

link_state = enum {

  CONNECTING;

  CONNECTED;

  UNCONNECTED;

  ERR;

  STOP;

}

work_mode = enum {

  UNICAST;

  BROADCAST;

  SMALLCLASS;

}

#log interfaces for special platform

i_log = interface +c +o +j {

  warn(tag: string, message: string);

  debug(tag: string, message: string);

  error(tag: string, message: string);

  info(tag: string, message: string);

  verbose(tag: string, message: string);

  sc(tag: string, message: string);

  sc1(tag: string);

}

#async task class

i_async_task = interface +c {

  execute();

}

#run loop class for special platform to implement and pass to native 

i_event_loop = interface +c +o +j {

  post(task: i_async_task);

}

i_api_observer = interface +c +o +j {

  onClassroomState(state: string,errorCode: i32, msg: string);

  onCoreInitState(state: string);

  onCameraCtrlResponse(resp: string);

  onMicCtrlResponse(rest: string);

  onSpeakerCtrlResponse(resp: string);

  onException(msg:string);

}

i_video_observer = interface +c +o +j {

  onRemoteVideoFrame(uid: string, video_frame: i_video_frame);

  onPriviewVideoFrame(uid: string, video_frame: i_video_frame);

  onPreProcessPriviewVideoFrame(uid: string, video_frame: i_video_frame): i_video_frame; //返回一个i_video_frame类型

}

#why need to export class coreSdk?

coreSdk = interface +c {

  onCreate(vendor:sdk_vendor,option: string);

  onStart(config: string);

  onSendVideoFrame(type: i32, videoFrame: i_video_frame);

  onSendAudioFrame(audioFrame: i_audio_frame);

  onSendAppData(AppData: string);

  onNetworkChange(networkStatus: string);

  onAppstatusChange(appStatus: string);

  onSetClassInformation(config: string);

  onCameraCtrl(config: string);

  onMicCtrl(config: string);

  onSpeakerCtrl(config: string);

  onRoomCtrl(config: string);

  onStop();

  onRelease();

}

#rtc api class for app layer to invoke with

rtcApi = interface +c {

  static creatertcApi(log: i_log, ui_thread: i_event_loop): chinookApi;

  static getVersion(): string;

  setApiObserver(apiObserver: i_api_observer);

  setNetworkObserver(netObserver: i_network_observer);

  setVideoObserver(videoObserver: i_video_observer);

  setAudioObserver(audioObserver: i_audio_observer);

  setAppObserver(appObserver: i_app_observer);

  setNetworkStatus(networkStatus: string);

  setAppStatus(appStatus: string);

  InitCoreSdk(type: sdk_vendor, option: string);

  ReleaseCore(type: sdk_vendor);

  sendVideoFrame(source_width: i32, source_height: i32, type: i32, videoFrame: i_video_frame);

  sendAudioFrame(audioFrame: i_audio_frame);

  sendAppData(AppData: string): string;

  setClassInformation(config: string);

  cameraCtrl(config: string);

  micCtrl(config: string);

  speakerCtrl(config: string);

  roomCtrl(config: string);

  enterClassroom(config: string);

  exitClassroom();

  test(config:string);

}