前言
小盒的直播业务一开始是打算用两套引擎切换使用的，所以需要封装一下。而且因为声网和阿里的直播sdk的官方文档都不是很全面，甚至有的还有错误（可能是文档没及时更新）导致无法正常运行，接入时问题多多，所以同时记录一下的接入过程中的问题及处理。
定义接口
首先因为需要两个引擎切换使用，所以定义了接口，定义常用的行为
代码语言：javascript复制public interface RtcEngine {
void init(Context context, RtcInfo config);
void join();
void leave();
void setRtcListener(RtcListener rtcListener);
}
这里RtcInfo是两个sdk需要用到的参数，由服务端提供。我们是初始化时一次性提供，当然也可以实时提供，如果实时提供，join函数也需要一些添加必要参数。
RtcInfo的定义如下：
public class RtcInfo {
public AgoraConfig agoraConfig;
public AliConfig aliConfig;
public String rtcType;
}
public class AgoraConfig {
public String liveChannel;
public String appId;
public int avatarUID;
public int liveUID;
public String liveToken;
}
public class AliConfig {
public String liveChannel;
public String appId;
public String avatarUID;
public String liveUID;
public String liveToken;
...
}
另外还有一个监听RtcListener，统一了两个sdk的回调，可以自行丰富
public interface RtcListener {
void remoteOnline(View remoteView); //当收到流之后，将remoteView加入页面中展示
void remoteOffline();
}
接入声网
声网的封装类，实现RtcEngine接口：
public class AgoraEngine implements RtcEngine {
private final String TAG = this.getClass().getSimpleName();
private Context mContext;
private io.agora.rtc.RtcEngine engine;
private RtcInfo mConfig;
private RtcListener listener;
private SurfaceView mRemoteView;
private final IRtcEngineEventHandler iRtcEngineEventHandler = new IRtcEngineEventHandler() {
@Override
public void onJoinChannelSuccess(String s, int i, int i1) {
super.onJoinChannelSuccess(s, i, i1);
}
@Override
public void onLeaveChannel(RtcStats rtcStats) {
super.onLeaveChannel(rtcStats);
}
@Override
public void onUserOffline(int i, int i1) {
super.onUserOffline(i, i1);
}
@Override
public void onWarning(int i) {
super.onWarning(i);
}
@Override
public void onError(int i) {
super.onError(i);
}
@Override
public void onUserJoined(final int uid, int elapsed) {
super.onUserJoined(uid, elapsed);
//这里获取到流，设置RemoteVideo并展示
//因为有两路流，我们只使用了一路，所以需要判断一下，只展示老师的流
if (uid != mConfig.agoraConfig.avatarUID && uid < xxxx) {
...
}
if (uid == mConfig.agoraConfig.avatarUID) {
//发现uid与老师id一致，创建设置RemoteVideo并展示
mRemoteView.setActivated(true);
mRemoteView.setEnabled(true);
new Handler(mContext.getMainLooper()).post(new Runnable() {
@Override
public void run() {
mRemoteView = io.agora.rtc.RtcEngine.CreateRendererView(mContext);
mRemoteView.setActivated(true);
mRemoteView.setEnabled(true);
if(listener != null){
//交给页面处理，一般是将播放器展示出来
listener.joinSuccess(mRemoteView);
}
...
}
});
}
}
@Override
public void onFirstRemoteVideoFrame(final int uid, int w, int h, int i3) {
//官方文档表明在这里会获取第一祯流，然后设置RemoteVideo并展示。实际使用中发现这里根本不回调，而且在onUserJoined中处理RemoteVideo
}
};
@Override
public void init(Context context, RtcInfo config) {
mConfig = config;
mContext = context.getApplicationContext();
try {
engine = io.agora.rtc.RtcEngine.create(mContext, config.agoraConfig.appId, iRtcEngineEventHandler);
engine.setChannelProfile(Constants.CHANNEL_PROFILE_LIVE_BROADCASTING);
engine.setVideoProfile(Constants.VIDEO_PROFILE_240P_4, false);
engine.setClientRole(Constants.CLIENT_ROLE_AUDIENCE);
engine.enableVideo();
engine.setParameters("{"che.audio.keep.audiosession":true}");
} catch (Exception e) {
Log.e(TAG, TAG, e);
engine = null;
}
}
@Override
public void join() {
if(engine != null){
engine.joinChannel(mConfig.agoraConfig.liveToken, mConfig.agoraConfig.liveChannel, "", mConfig.agoraConfig.liveUID);
}
}
@Override
public void leave() {
if(engine != null){
engine.leaveChannel();
io.agora.rtc.RtcEngine.destroy();
engine = null;
}
}
@Override
public void setRtcListener(RtcListener rtcListener) {
listener = rtcListener;
}
}
重点注意onFirstRemoteVideoFrame在官方文档表明在这里会获取第一祯流，然后设置RemoteVideo并展示。实际使用中发现这里根本不回调，而且在onUserJoined中处理RemoteVideo，在官方Demo里也是这么处理的，应该是文档更新滞后了。（不知道现在更没更新）。
代码中我们没有对onUserOffline进行处理，后续实际上是补充了相关功能，这里注意的是一定要校验uid，否则可能导致问题。比如在老师退出直播间的时候我们需要做一些页面调整，但是如果这里没有校验uid，那么其他人（特殊身份）在退出时也会执行这部分代码。
接入阿里直播
阿里的封装类，同样实现RtcEngine接口：
public class AliEngine implements RtcEngine {
private final String TAG = this.getClass().getSimpleName();
private Context mContext;
private AliRtcEngine mEngine;
private RtcInfo mConfig;
//private SophonSurfaceView mRemoteView;
private AliRtcEngine.AliVideoCanvas mCanvas;
private RtcListener listener;
private AliRtcEngineEventListener aliRtcEngineEventListener = new AliRtcEngineEventListener() {
...
};
private AliRtcEngineNotify aliRtcEngineNotify = new AliRtcEngineNotify() {
...
@Override
public void onRemoteTrackAvailableNotify(final String uid, AliRtcEngine.AliRtcAudioTrack audioTrack, final AliRtcEngine.AliRtcVideoTrack videoTrack) {
super.onRemoteTrackAvailableNotify(uid, audioTrack, videoTrack);
//收到流的第一祯，先判断是不是老师的流
if(uid.equals(mConfig.aliConfig.avatarUID)) {
// mEngine.configRemoteAudio(mConfig.aliConfig.avatarUID, true);
// mEngine.configRemoteScreenTrack(mConfig.aliConfig.avatarUID, true);
// mEngine.configRemoteCameraTrack(mConfig.aliConfig.avatarUID, true, true);
// mEngine.subscribe(mConfig.aliConfig.avatarUID);
new Handler(mContext.getMainLooper()).post(new Runnable() {
@Override
public void run() {
if(mEngine == null){
return;
}
AliRtcRemoteUserInfo info = mEngine.getUserInfo(uid);
if(info == null){
return;
}
AliRtcEngine.AliVideoCanvas cameraCanvas = info.getCameraCanvas();
AliRtcEngine.AliVideoCanvas screenCanvas = info.getScreenCanvas();
if(videoTrack == AliRtcEngine.AliRtcVideoTrack.AliRtcVideoTrackNo){
screenCanvas = null;
cameraCanvas = null;
}
else if(videoTrack == AliRtcEngine.AliRtcVideoTrack.AliRtcVideoTrackCamera){
//我们只需要摄像头的流。这里创建设置remoteView，并展示
mCanvas = new AliRtcEngine.AliVideoCanvas();
SophonSurfaceView mRemoteView = new SophonSurfaceView(mContext);
if(listener != null){
//交给页面处理，一般是将播放器展示出来
listener.joinSuccess(mRemoteView);
}
mRemoteView.setZOrderOnTop(true);
mRemoteView.setZOrderMediaOverlay(true);
mCanvas.view = mRemoteView;
...
screenCanvas = null;
cameraCanvas = mCanvas;
mEngine.setRemoteViewConfig(cameraCanvas, uid, AliRtcEngine.AliRtcVideoTrack.AliRtcVideoTrackCamera);
}
}
});
}
}
...
};
@Override
public void init(Context context, RtcInfo config) {
mContext = context;
mConfig = config;
mEngine = AliRtcEngine.getInstance(context);
mEngine.setRtcEngineEventListener(aliRtcEngineEventListener);
mEngine.setRtcEngineNotify(aliRtcEngineNotify);
mEngine.setClientRole(AliRtcEngine.AliRTCSDK_Client_Role.AliRTCSDK_live);
mEngine.setChannelProfile(AliRtcEngine.AliRTCSDK_Channel_Profile.AliRTCSDK_Interactive_live);
mEngine.setAutoPublishSubscribe(false, true);
}
@Override
public void join() {
AliRtcAuthInfo info = new AliRtcAuthInfo();
info.setConferenceId(mConfig.aliConfig.liveChannel);
info.setAppid(mConfig.aliConfig.appId);
info.setUserId(mConfig.aliConfig.liveUID);
...
info.setToken(mConfig.aliConfig.liveToken);
if(mEngine != null){
mEngine.joinChannel(info, "");
}
}
@Override
public void leave() {
if(mEngine != null){
mEngine.leaveChannel();
}
mEngine = null;
}
@Override
public void setRtcListener(RtcListener rtcListener) {
listener = rtcListener;
}
}
与声网的很类似，注意事项也差不多，因为关键部分都有注释，这里就不细说了。
总结
这样在进入直播前，通过后台获取直播配置，根据类型初始化不同的引擎来使用即可。
