原始数据采集

如果您有业务场景需要自行处理音频或视频数据，BRTC SDK 提供了若干回调方法，允许您在SDK将数据发送给编码器之前进行修改。

视频原始数据读取

通过接口 setLocalVideoProcessListener 设置本地视频帧监听，通过回调函数接收编码前采集的原始视频数据， 返回处理后的数据给 SDK 做后续处理。

// 初始化与进房
BRTC engine = BRTC.sharedInstance(getApplicationContext());
engine.setListener(brtcListener);
BRTCDef.BRTCParams BRTCParams = 
    new BRTCDef.BRTCParams(appId, roomId, localUid, uSig, BRTCDef.BRTCRoleType.BRTCRoleAnchor);
engine.enterRoom(BRTCParams);

BBRTCListener brtcListener = new BRTCListener() {
    @Override
    public void onEnterRoom(long result) {
        // 开启视频预览并推流
        engine.startLocalPreview(true, localVideoViewMaster);
        engine.muteLocalVideo(false);

        //设置视频帧监听回调
engine.setLocalVideoProcessListener(BRTCVideoFrame.BRTC_VIDEO_PIXEL_FORMAT_NV21, BRTC_VIDEO_BUFFER_TYPE_BYTE_ARRAY, brtcVideoFrameListener);
    }
};

BRTCListener.BRTCVideoFrameListener brtcVideoFrameListener = new BRTCListener.BRTCVideoFrameListener() {
    @Override
    public void onGLContextCreated() {
    }

    @Override
    public int onProcessVideoFrame(BRTCVideoFrame srcFrame, BRTCVideoFrame dstFrame) {
        for (int i = 0; i < dstFrame.data.length; i += 2) {  
            dstFrame.data[i] = (byte) (dstFrame.data[i] >>> 1);  
        }  
        return 0;
    }

    @Override
    public void onGLContextDestroy() {
    }
};

音频原始数据

通过接口 setAudioFrameListener 设置本地音频帧监听，通过回调函数接收编码前的音频数据

// 初始化与进房
BRTC engine = BRTC.sharedInstance(getApplicationContext());
engine.setListener(brtcListener);
BRTCDef.BRTCParams BRTCParams = 
    new BRTCDef.BRTCParams(appId, roomId, localUid, uSig, BRTCDef.BRTCRoleType.BRTCRoleAnchor);
engine.enterRoom(BRTCParams);

BBRTCListener brtcListener = new BRTCListener() {
    @Override
    public void onEnterRoom(long result) {
        //设置音频频帧监听回调
        engine.setAudioFrameListener(brtcAudioFrameListener);

        // 开启音频采集并推流
        engine.startLocalAudio(BRTCDef.BRTCAudioQuality.BRTCAudioQualitySpeech);
        engine.muteLocalAudio(false);
    }
};

BRTCListener.BRTCAudioFrameListener brtcAudioFrameListener = new BRTCListener.BRTCAudioFrameListener() {
    // 回调本地采集并经过音频模块前处理(3A)后的音频数据
    @Override
    public void onCapturedRawAudioFrame(BRTCDef.BRTCAudioFrame audioFrame) {

    }
    // 回调在 onCapturedRawAudioFrame 后附加了背景音效、媒体文件的音频数据
    @Override
    public void onLocalProcessedAudioFrame(BRTCDef.BRTCAudioFrame audioFrame) {

    }
};