网易纯直播 SDK 基本操作

1 获取可用的音视频设备列表

Nlss_GetFreeDevicesNum获取当前摄像头/麦克风的个数。

NLSS_RET  Nlss_GetFreeDevicesNum(NLSS_OUT int *iVideoDeviceNum, NLSS_OUT int *iAudioDeviceNum);
NLSS_RET  Nlss_GetFreeDeviceInf(NLSS_OUT ST_NLSS_INDEVICE_INF *pstVideoDevices, int iMaxVideoDevicesNum, NLSS_OUT ST_NLSS_INDEVICE_INF* pstAudioDevices, int iMaxAudioDevicesNum);

 bool LssManange::GetFreeDevicesNum(int* video_num, int* audio_num){if (NLSS_OK == NLS_SDK_GET_FUNC(Nlss_GetFreeDevicesNum)(video_num, audio_num))return true;else  return false;}

 void CheckDeviceInfo(ST_NLSS_INDEVICE_INF** info, int num){if (num > 0){*info = new ST_NLSS_INDEVICE_INF[num];for (int i = 0; i < num; i++){(*info)[i].paPath = new char[1024];(*info)[i].paFriendlyName = new char[1024];}}}

 bool LssManange::GetFreeDeviceInf(NLSS_OUT ST_NLSS_INDEVICE_INF **pstVideoDevices, int *iMaxVideoDevicesNum, NLSS_OUT ST_NLSS_INDEVICE_INF**pstAudioDevices, int *iMaxAudioDevicesNum){GetFreeDevicesNum(iMaxVideoDevicesNum, iMaxAudioDevicesNum);if (iMaxVideoDevicesNum){CheckDeviceInfo(pstVideoDevices, *iMaxVideoDevicesNum);}if (iMaxAudioDevicesNum){CheckDeviceInfo(pstAudioDevices, *iMaxAudioDevicesNum);}if (NLSS_OK == NLS_SDK_GET_FUNC(Nlss_GetFreeDeviceInf)(*pstVideoDevices, *iMaxVideoDevicesNum, *pstAudioDevices, *iMaxAudioDevicesNum))return true;else return false;}

示例：

 int32_t m_iAudioDeviceNum;               //麦克风数目ST_NLSS_INDEVICE_INF * m_pAudioDevices;  //麦克风设备列表int32_t m_iVideoDeviceNum; //视频设备数目ST_NLSS_INDEVICE_INF * m_pVideoDevices;  //视频设备列表

 nim_nls::LssManange::GetFreeDeviceInf(&m_pVideoDevices, &m_iVideoDeviceNum, &m_pAudioDevices, &m_iAudioDeviceNum);

2 遍历摄像头

std::string NLSLiveForm::GetCurCameraName(){std::string curCameraPath = GetCurCameraPath();for (int i = 0; i < m_iVideoDeviceNum;i++){if (curCameraPath==m_pVideoDevices[i].paPath){return m_pVideoDevices[i].paFriendlyName;}}return "";}

int  NLSLiveForm::GetCameraIndeviceIndex(std::string accid){for (int i = 0; i < m_iVideoDeviceNum;i++){if (accid.find(m_pVideoDevices[i].paPath) != std::string::npos){return i;}}return -1;
}

std::string NLSLiveForm::GetCameraNameFromPath(std::string path){for (int i = 0; i < m_iVideoDeviceNum; i++){if (path == m_pVideoDevices[i].paPath){return m_pVideoDevices[i].paFriendlyName;}}return "";}

std::string NLSLiveForm::GetCameraPathFromName(std::string name){for (int i = 0; i < m_iVideoDeviceNum; i++){if (name == m_pVideoDevices[i].paFriendlyName){return m_pVideoDevices[i].paPath;}}return "";}

 std::string vedioPath;std::string firstCameraPath;//加入第一个摄像头//默认预览第一个m_VideoSourceType = EN_NLSS_VIDEOIN_CAMERA;vedioPath = m_pVideoDevices[0].paPath;firstCameraPath = m_pVideoDevices[0].paPath;m_CameraPathList.push_back(vedioPath);pCameraWnd->SetCurCamera(GetCurCameraPath(), m_CameraCaptureQ);//处于预览中，才能添加其它视频源PreView();//加入其它摄像头for (int i = 1; i < m_iVideoDeviceNum;i++){vedioPath = m_pVideoDevices[i].paPath;m_CameraPathList.push_back(vedioPath);//设置当前摄像头所能采集的清晰度pCameraWnd->SetCurCamera(GetCurCameraPath(), m_CameraCaptureQ);AddNewVideoSource();                   //每次加的设备路径 为m_CameraPathList.back() 最后末尾}

3 ACCID

std::string NLSLiveForm::GetAccidFromPath(std::string path, int nVideoType)
{std::string accid;bool bVideoExisten = false;switch (nVideoType){case EN_NLSS_VIDEOIN_FULLSCREEN:accid = "video name is fullscreen";break;case EN_NLSS_VIDEOIN_CAMERA://获取视频参数if (m_pVideoDevices != NULL){// m_VideoTypeName = L"摄像头";accid = nbase::StringPrintf("child video name is camera,path :%s", path.c_str());}else{return accid;}break;case EN_NLSS_VIDEOIN_RECTSCREEN:break;case EN_NLSS_VIDEOIN_APP:   if (m_pAppWinds != NULL){accid = nbase::StringPrintf("child video name is app path :%s", path.c_str());}else{return accid;}break;case EN_NLSS_VIDEOIN_PNG:{}break;case EN_NLSS_VIDEOIN_NONE:return accid;break;default:return accid;break;}return accid;
}

std::string  NLSLiveForm::GetAccidFromName(std::string name){std::string path = GetCameraPathFromName(name);if (path != ""){std::string accid = GetAccidFromPath(path);return accid;}elsereturn "";}

std::string NLSLiveForm::GetCurCameraAccid(){//m_CameraPathList.back();std::string curVideoPath = m_CameraPathList.back();return GetAccidFromPath(curVideoPath);
}

_HNLSSCHILDSERVICE

     std::map<std::string, _HNLSSCHILDSERVICE > nlss_child_services_; //子窗口句柄映射std::string accid;         //子窗口标识符

 _HNLSSCHILDSERVICE LsSession::GetChildServiceByAccid(std::string accid){nbase::NAutoLock auto_lock(&lock_);std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end()){return iter->second;}return NULL;}

打开摄像头时，创建该摄像头句柄

 bool  LsSession::OnChildVideoOpen(const std::string& accid, ST_NLSS_VIDEOIN_PARAM *pVideoInParam){nbase::NAutoLock auto_lock(&lock_);bool ret = false;if (ls_client_){_HNLSSCHILDSERVICE NewLsChildClient = NLS_SDK_GET_FUNC(Nlss_ChildVideoOpen)(LsClient, pVideoInParam);if (NewLsChildClient != NULL){if (nlss_child_services_.find(accid) == nlss_child_services_.end()){std::pair< std::map< std::string, _HNLSSCHILDSERVICE>::iterator, bool > inert_ret;inert_ret = nlss_child_services_.insert(std::pair<std::string, _HNLSSCHILDSERVICE >(accid, NewLsChildClient));if (inert_ret.second)ret = true;}}}if (ret == false)m_errorLog.WriteErrorFuc("OnChildVideoOpen");return ret;}

其它的摄像头管理操作，都是通过摄像头句柄实现的

设置为背景

 void LsSession::OnChildVideoSetBackLayer(const std::string& accid){std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end())NLS_SDK_GET_FUNC(Nlss_ChildVideoSetBackLayer)(iter->second);}

上移图层

 void LsSession::OnChildVideoSetAdjustLayer(const std::string& accid, bool bAdustUp){std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end())NLS_SDK_GET_FUNC(Nlss_ChildVideoAdjustLayer)(iter->second, bAdustUp);}

设置显示区域

 void LsSession::OnChildVideoSetDisplayRect(const std::string& accid, ST_NLSS_RECTSCREEN_PARAM *pstRect){std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end())NLS_SDK_GET_FUNC(Nlss_ChildVideoSetDisplayRect)(iter->second, pstRect);}

关闭子窗口

 void LsSession::OnChildVideoClose(const std::string& accid){std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end()){NLS_SDK_GET_FUNC(Nlss_ChildVideoClose)(iter->second);nlss_child_services_.erase(iter);}}

隐藏

 void  LsSession::OnChildVideoSwitchDisplay(const std::string& accid, bool bHide){std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end())NLS_SDK_GET_FUNC(Nlss_ChildVideoSwitchDisplay)(iter->second, bHide);}

开始采集

 bool LsSession::OnChildVideoStartCapture(const std::string& accid){bool ret = false;std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end()){NLSS_RET nReturn = NLS_SDK_GET_FUNC(Nlss_ChildVideoStartCapture)(iter->second);if (NLSS_OK != nReturn)m_errorLog.WriteErrorFuc("Nlss_ChildVideoStartCapture", (int)nReturn);ret = (NLSS_OK == nReturn);}return ret;}

停止采集

 void  LsSession::OnChildVideoStopCapture(const std::string& accid){std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end())NLS_SDK_GET_FUNC(Nlss_ChildVideoStopCapture)(iter->second);}

设置单视频回调

 void LsSession::OnChildVideoSetSoloPreviewCB(const std::string& accid, PFN_NLSS_CHILD_VIDEO_SAMPLER_CB pFunVideoSamplerCB){std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end())NLS_SDK_GET_FUNC(Nlss_ChildVideoSetSoloPreviewCB)(iter->second, pFunVideoSamplerCB);}

单视频回调开关

 void  LsSession::OnChildVideoSwitchSoloPreview(const std::string& accid, bool bOn){std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end())NLS_SDK_GET_FUNC(Nlss_ChildVideoSwitchSoloPreview)(iter->second, bOn);}

暂停推流

 void  LsSession::OnChildVideoPauseLiveStream(const std::string& accid){std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end())NLS_SDK_GET_FUNC(Nlss_ChildVideoPauseLiveStream)(iter->second);}

恢复推流

 void LsSession::OnChildVideoResumeLiveStream(const std::string&accid){std::map<std::string, _HNLSSCHILDSERVICE>::const_iterator iter = nlss_child_services_.find(accid);if (iter != nlss_child_services_.end())NLS_SDK_GET_FUNC(Nlss_ChildVideoResumeLiveStream)(iter->second);}

开始推流

 void LsSession::DoStartLiveStream(nim_nls::OptCallback cb){bool ret = false;if (NLSS_OK == NLS_SDK_GET_FUNC(Nlss_StartLiveStream)(LsClient)){live_streaming_ = true;ret = true;}else {ret = false;}if (cb){Post2UI(nbase::Bind(cb, ret));}}

结束推流

 void LsSession::DoStopLiveStream(nim_nls::OptCallback cb){nbase::NAutoLock auto_lock(&lock_);bool ret = true;if (live_streaming_ && ls_client_){NLS_SDK_GET_FUNC(Nlss_StopLiveStream)(LsClient);{live_streaming_ = false;ret = true;}}else {ret = false;}if (cb){Post2UI(nbase::Bind(cb, ret));}}

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