tencent cloud

// 创建 TRTCCloud 主实例（人声实例）
TRTCCloud mTRTCCloud = TRTCCloud.sharedInstance(getApplicationContext());
// 创建 TRTCCloud 子实例（伴奏实例）
TRTCCloud subCloud = mTRTCCloud.createSubCloud();

TRTCCloudDef.TRTCParams params = new TRTCCloudDef.TRTCParams();
params.sdkAppId = sdkAppId;
params.userId = mUserId;
params.userSig = userSig;
params.role = TRTCCloudDef.TRTCRoleAnchor;
params.roomId = mRoomId;
mTRTCCloud.enterRoom(params, TRTCCloudDef.TRTC_APP_SCENE_LIVE);
// 打开音频上行，设置音质
mTRTCCloud.startLocalAudio(TRTCCloudDef.TRTC_AUDIO_QUALITY_MUSIC);
// 设置媒体类型
mTRTCCloud.setSystemVolumeType(TRTCCloudDef.TRTCSystemVolumeTypeMedia);
// 静音远端伴奏音乐
mTRTCCloud.muteRemoteAudio(mUserId + "_bgm", true);

TRTCCloudDef.TRTCParams bgmParams = new TRTCCloudDef.TRTCParams();
bgmParams.sdkAppId = sdkAppId;
bgmParams.userId = mUserId + "_bgm";
bgmParams.userSig = userSig;
bgmParams.role = TRTCCloudDef.TRTCRoleAnchor;
bgmParams.roomId = mRoomId;
subCloud.enterRoom(bgmParams, TRTCCloudDef.TRTC_APP_SCENE_LIVE);
//设置媒体类型
subCloud.setSystemVolumeType(TRTCCloudDef.TRTCSystemVolumeTypeMedia);

// 开启预加载
subCloud.callExperimentalAPI("{\\"api\\":\\"preloadMusic\\",\\"params\\": {\\"musicId\\":musicId,\\"path\\":\\"path\\",\\"startTimeMS\\":startTimeMS}}");
// 播放伴奏音乐并推流（在约定时间播放）
TXAudioEffectManager.AudioMusicParam param = new TXAudioEffectManager.AudioMusicParam(musicID, musicPath);
// 将伴奏音乐传到远端
param.publish = true;
subCloud.getAudioEffectManager().startPlayMusic(param);

// 创建 TRTCPublishTarget 对象
TRTCCloudDef.TRTCPublishTarget target = new TRTCCloudDef.TRTCPublishTarget();
// 混流后回推到房间，若发布到 CDN 应填 TRTC_PublishMixStream_ToCdn
target.mode = TRTCCloudDef.TRTC_PublishMixStream_ToRoom;
target.mixStreamIdentity.intRoomId = Integer.parseInt(mRoomId);
// 混流机器人的 userid，不能和房间内其他用户的 userid 重复
target.mixStreamIdentity.userId = mUserId + "_mix";
 
// 设置转码后的音频流的编码参数
TRTCCloudDef.TRTCStreamEncoderParam trtcStreamEncoderParam = new TRTCCloudDef.TRTCStreamEncoderParam();
trtcStreamEncoderParam.audioEncodedChannelNum = 2;
trtcStreamEncoderParam.audioEncodedKbps = 64;
trtcStreamEncoderParam.audioEncodedCodecType = 2;
trtcStreamEncoderParam.audioEncodedSampleRate = 48000;

// 设置音频混流参数
TRTCCloudDef.TRTCStreamMixingConfig trtcStreamMixingConfig = new TRTCCloudDef.TRTCStreamMixingConfig();
// 支持填写空值，会自动将所有主播的音频混合输出
trtcStreamMixingConfig.audioMixUserList = null;

// 发起混流转推请求
mTRTCCloud.startPublishMediaStream(target, trtcStreamEncoderParam, trtcStreamMixingConfig);