GB/T28181技术背景
在此之前,我们先对协议规范做个简单了解:GB28181协议是一种用于视频监控系统互联互通的国际标准,它定义了视频监控系统中的设备间如何进行通信、交换数据和协调控制。以下是GB28181协议的一些主要内容:
- 设备互联互通
GB28181协议的核心是实现不同厂商、不同品牌、不同型号的设备之间的互联互通。通过该协议,可以实现视频监控系统的统一管理和调度,以及设备间的信息共享和联动控制。
- 实时流传输
GB28181协议支持实时流传输,包括视频流、音频流、报警信息等。在传输过程中,协议提供了可靠的传输机制,确保数据能够及时、准确地传输到目的地。
- 设备管理
视频监控系统中,设备的管理和维护是非常重要的。GB28181协议定义了设备的注册、认证、授权、配置等管理操作,以及设备状态监测、故障诊断等功能,为系统的稳定运行提供了保障。
- 数据交互
GB28181协议支持设备之间的数据交互,包括视频、音频、报警信息等数据的共享和转发。同时,还支持设备的控制指令和命令的传递,实现了系统中的双向通信。
- 安全保障
GB28181协议提供了多种安全保障机制,包括用户认证、授权管理、数据加密、访问控制等,确保系统的安全性和可靠性。
- 标准性和可扩展性
GB28181协议遵循开放式架构的原则,具有良好的标准性和可扩展性。同时,协议还提供了与其他标准(如ONVIF、PSI等)的兼容性,方便了系统的集成和融合。
总之,GB28181协议是一种适用于视频监控系统的互联互通协议,它具有设备互联互通、实时流传输、设备管理、数据交互和安全保障等特点。通过该协议的应用,可以实现视频监控系统的统一管理和调度,提高系统的效率和使用体验。
Android平台如何实现GB28181设备对接?
Android平台GB28181接入模块设计的目的,可实现不具备国标音视频能力的 Android终端,通过平台注册接入到现有的GB/T28181—2016服务,可用于如智能监控、智慧零售、智慧教育、远程办公、生产运输、智慧交通、车载或执法记录仪等场景。
Android终端除支持常规的音视频数据接入外,还可以支持移动设备位置(MobilePosition)订阅和通知、语音广播和语音对讲、云台控制回调和预置位查询,支持对接数据类型如下:
- 编码前数据(目前支持的有YV12/NV21/NV12/I420/RGB24/RGBA32/RGB565等数据类型);
- 编码后数据(如无人机等264/HEVC数据,或者本地解析的MP4音视频数据);
- 拉取RTSP或RTMP流并接入至GB28181平台(比如其他IPC的RTSP流,可通过Android平台GB28181接入到国标平台)。
功能支持
- [视频格式]H.264/H.265(Android H.265硬编码);
- [音频格式]G.711 A律、AAC;
- [音量调节]Android平台采集端支持实时音量调节;
- [H.264硬编码]支持H.264特定机型硬编码;
- [H.265硬编码]支持H.265特定机型硬编码;
- [软硬编码参数配置]支持gop间隔、帧率、bit-rate设置;
- [软编码参数配置]支持软编码profile、软编码速度、可变码率设置;
- 支持纯视频、音视频PS打包传输;
- 支持RTP OVER UDP和RTP OVER TCP被动模式;
- 支持信令通道网络传输协议TCP/UDP设置;
- 支持注册、注销,支持注册刷新及注册有效期设置;
- 支持设备目录查询应答;
- 支持心跳机制,支持心跳间隔、心跳检测次数设置;
- 支持移动设备位置(MobilePosition)订阅和通知;
- 支持语音广播;
- 支持语音对讲;
- 支持云台控制和预置位查询;
- [实时水印]支持动态文字水印、png水印;
- [镜像]Android平台支持前置摄像头实时镜像功能;
- [实时静音]支持实时静音/取消静音;
- [实时快照]支持实时快照;
- [降噪]支持环境音、手机干扰等引起的噪音降噪处理、自动增益、VAD检测;
- [外部编码前视频数据对接]支持YUV数据对接;
- [外部编码前音频数据对接]支持PCM对接;
- [外部编码后视频数据对接]支持外部H.264数据对接;
- [外部编码后音频数据对接]外部AAC数据对接;
- [扩展录像功能]支持和录像SDK组合使用,录像相关功能。
接口设计
以Android平台Camera2对接为例,信令部分需要实现如下标红接口:
public class MainActivity extends Activity implements ViewTreeObserver.OnGlobalLayoutListener, Camera2Listener,
GBSIPAgentListener, GBSIPAgentPlayListener, GBSIPAgentAudioBroadcastListener,
GBSIPAgentDeviceControlListener, GBSIPAgentQueryCommandListener, GBSIPAgentTalkListener{
}
媒体数据处理接口,可参照SmartPublisherJniV2.java,如需语音广播或语音对讲,可参照SmartPlayerJniV2.java。
信令处理
GBSIPAgentListener主要系GB28181注册、心跳、DevicePosition等,如注册成功、注册超时、注册网络传输层错误、心跳异常、设备位置请求处理:
public interface GBSIPAgentListener
{
/*注册成功
* @param dateString: 服务器日期,用来校准设备端时间,用户自行决定是否校准设备时间
*/
void ntsRegisterOK(String dateString);
/*
*注册超时
*/
void ntsRegisterTimeout();
/*
*注册网络传输层异常
*/
void ntsRegisterTransportError(String errorInfo);
/*
*心跳达到异常次数
*/
void ntsOnHeartBeatException(int exceptionCount, String lastExceptionInfo);
/*
* 设备位置请求, 这个主要用在移动设备位置订阅上
* @param interval 请求间隔, 单位是毫秒
*/
void ntsOnDevicePositionRequest(String deviceId, int interval);
}
GBSIPAgentPlayListener主要系GB28181的Invite、Ack、Bye等处理:
public interface GBSIPAgentPlayListener {
/*
*收到s=Play的实时视音频点播
*/
void ntsOnInvitePlay(String deviceId, SessionDescription sessionDescription);
/*
*发送play invite response 异常
*/
void ntsOnPlayInviteResponseException(String deviceId, int statusCode, String errorInfo);
/*
* 收到CANCEL play INVITE请求
*/
void ntsOnCancelPlay(String deviceId);
/*
* 收到Ack
*/
void ntsOnAckPlay(String deviceId);
/*
* 收到Bye
*/
void ntsOnByePlay(String deviceId);
/*
* 不是在收到BYE Message情况下, 终止Play
*/
void ntsOnTerminatePlay(String deviceId);
/*
* Play会话对应的对话终止, 一般不会出发这个回调,目前只有在响应了200K, 但在64*T1时间后还没收到ACK,才可能会出发
收到这个, 请做相关清理处理
*/
void ntsOnPlayDialogTerminated(String deviceId);
}
GBSIPAgentAudioBroadcastListener主要系GB28181语音广播处理相关,如有语音广播相关需求,可参照demo实例实现:
public interface GBSIPAgentAudioBroadcastListener {
/*
*收到语音广播通知
*/
void ntsOnNotifyBroadcastCommand(String fromUserName, String fromUserNameAtDomain, String sn, String sourceID, String targetID);
/*
*需要准备接受语音广播的SDP内容
*/
void ntsOnAudioBroadcast(String commandFromUserName, String commandFromUserNameAtDomain, String sourceID, String targetID);
/*
*音频广播, 发送Invite请求异常
*/
void ntsOnInviteAudioBroadcastException(String sourceID, String targetID, String errorInfo);
/*
*音频广播, 等待Invite响应超时
*/
void ntsOnInviteAudioBroadcastTimeout(String sourceID, String targetID);
/*
*音频广播, 收到Invite消息最终响应
*/
void ntsOnInviteAudioBroadcastResponse(String sourceID, String targetID, int statusCode, SessionDescription sessionDescription);
/*
* 音频广播, 收到BYE Message
*/
void ntsOnByeAudioBroadcast(String sourceID, String targetID);
/*
* 不是在收到BYE Message情况下, 终止音频广播
*/
void ntsOnTerminateAudioBroadcast(String sourceID, String targetID);
}
GBSIPAgentDeviceControlListener主要系GB28181设备控制相关,比如远程启动、云台控制:
public interface GBSIPAgentDeviceControlListener {
/*
* 收到远程启动控制命令
*/
void ntsOnDeviceControlTeleBootCommand(String deviceId, String teleBootValue);
/*
* 云台控制
*/
void ntsOnDeviceControlPTZCmd(String deviceId, String typeValue);
}
GBSIPAgentQueryCommandListener主要系GB28181查询命令,如预置位查询:
public interface GBSIPAgentQueryCommandListener {
/*
* 设备预置位查询
*/
void ntsOnDevicePresetQueryCommand(String fromUserName, String fromUserNameAtDomain, String sn, String deviceId);
}
GBSIPAgentTalkListener主要系GB28181语音对讲相关处理:
public interface GBSIPAgentTalkListener {
/*
*收到s=Talk 语音对讲
*/
void ntsOnInviteTalk(String deviceId, SessionDescription sessionDescription);
/*
*发送talk invite response 异常
*/
void ntsOnTalkInviteResponseException(String deviceId, int statusCode, String errorInfo);
/*
* 收到CANCEL Talk INVITE请求
*/
void ntsOnCancelTalk(String deviceId);
/*
* 收到Ack
*/
void ntsOnAckTalk(String deviceId);
/*
* 收到Bye
*/
void ntsOnByeTalk(String deviceId);
/*
* 不是在收到BYE Message情况下, 终止Talk
*/
void ntsOnTerminateTalk(String deviceId);
/*
* Talk会话对应的对话终止, 一般不会出发这个回调,目前只有在响应了200K, 但在64*T1时间后还没收到ACK,才可能会出发
收到这个, 请做相关清理处理
*/
void ntsOnTalkDialogTerminated(String deviceId);
}
媒体数据处理
RTP数据发送
RTP Sender(SmartPublisherJniV2.java)相关接口设计:
/*
* SmartPublisherJniV2.java
* Author: https://daniusdk.com
*/
/*
* 创建RTP Sender实例
*
* @param reserve:保留参数传0
*
* @return RTP Sender 句柄,0表示失败
*/
public native long CreateRTPSender(int reserve);
/**
*设置 RTP Sender传输协议
*
* @param rtp_sender_handle, CreateRTPSender返回值
* @param transport_protocol, 0:UDP, 1:TCP, 默认是UDP
*
* @return {0} if successful
*/
public native int SetRTPSenderTransportProtocol(long rtp_sender_handle, int transport_protocol);
/**
*设置 RTP Sender IP地址类型
*
* @param rtp_sender_handle, CreateRTPSender返回值
* @param ip_address_type, 0:IPV4, 1:IPV6, 默认是IPV4, 当前仅支持IPV4
*
* @return {0} if successful
*/
public native int SetRTPSenderIPAddressType(long rtp_sender_handle, int ip_address_type);
/**
*设置 RTP Sender RTP Socket本地端口
*
* @param rtp_sender_handle, CreateRTPSender返回值
* @param port, 必须是偶数,设置0的话SDK会自动分配, 默认值是0
*
* @return {0} if successful
*/
public native int SetRTPSenderLocalPort(long rtp_sender_handle, int port);
/**
*设置 RTP Sender SSRC
*
* @param rtp_sender_handle, CreateRTPSender返回值
* @param ssrc, 如果设置的话,这个字符串要能转换成uint32类型, 否则设置失败
*
* @return {0} if successful
*/
public native int SetRTPSenderSSRC(long rtp_sender_handle, String ssrc);
/**
*设置 RTP Sender RTP socket 发送Buffer大小
*
* @param rtp_sender_handle, CreateRTPSender返回值
* @param buffer_size, 必须大于0, 默认是512*1024, 当前仅对UDP socket有效, 根据视频码率考虑设置合适的值
*
* @return {0} if successful
*/
public native int SetRTPSenderSocketSendBuffer(long rtp_sender_handle, int buffer_size);
/**
*设置 RTP Sender RTP时间戳时钟频率
*
* @param rtp_sender_handle, CreateRTPSender返回值
* @param clock_rate, 必须大于0, 对于GB28181 PS规定是90kHz, 也就是90000
*
* @return {0} if successful
*/
public native int SetRTPSenderClockRate(long rtp_sender_handle, int clock_rate);
/**
*设置 RTP Sender 目的IP地址, 注意当前用在GB2818推送上,只设置一个地址,将来扩展如果用在其他地方,可能要设置多个目的地址,到时候接口可能会调整
*
* @param rtp_sender_handle, CreateRTPSender返回值
* @param address, IP地址
* @param port, 端口
*
* @return {0} if successful
*/
public native int SetRTPSenderDestination(long rtp_sender_handle, String address, int port);
/**
* 设置是否开启 RTP Receiver
* @param rtp_sender_handle, CreateRTPSender返回值
* @param is_enable, 0表示不收RTP包, 1表示收RTP包, SDK默认值为0.
* @return
*/
public native int EnableRTPSenderReceive(long rtp_sender_handle, int is_enable);
/**
*设置RTP Receiver SSRC
*
* @param rtp_sender_handle, CreateRTPSender返回值
* @param ssrc, 如果设置的话,这个字符串要能转换成uint32类型, 否则设置失败
*
* @return {0} if successful
*/
public native int SetRTPSenderReceiveSSRC(long rtp_sender_handle, String ssrc);
/**
*设置RTP Receiver Payload 相关信息
*
* @param rtp_sender_handle, CreateRTPSender返回值
*
* @param payload_type, 请参考 RFC 3551
*
* @param encoding_name, 编码名, 请参考 RFC 3551, 如果payload_type不是动态的, 可能传null就好
*
* @param media_type, 媒体类型, 请参考 RFC 3551, 1 是视频, 2是音频
*
* @param clock_rate, 请参考 RFC 3551
*
* @return {0} if successful
*/
public native int SetRTPSenderReceivePayloadType(long rtp_sender_handle, int payload_type, String encoding_name, int media_type, int clock_rate);
/**
*设置RTP Receiver PS的pts和dts clock frequency
*
* @param rtp_sender_handle, CreateRTPSender返回值
*
* @param ps_clock_frequency, 默认是90000, 一些特殊场景需要设置
*
* @return {0} if successful
*/
public native int SetRTPSenderReceivePSClockFrequency(long rtp_sender_handle, int ps_clock_frequency);
/**
*设置 RTP Receiver 音频采样率
*
* @param rtp_sender_handle, CreateRTPSender返回值
* @param sampling_rate, 音频采样率
*
* @return {0} if successful
*/
public native int SetRTPSenderReceiveAudioSamplingRate(long rtp_sender_handle, int sampling_rate);
/**
*设置 RTP Receiver 音频通道数
*
* @param rtp_sender_handle, CreateRTPSender返回值
* @param channels, 音频通道数
*
* @return {0} if successful
*/
public native int SetRTPSenderReceiveAudioChannels(long rtp_sender_handle, int channels);
/**
*初始化RTP Sender, 初始化之前先调用上面的接口配置相关参数
*
* @param rtp_sender_handle, CreateRTPSender返回值
*
* @return {0} if successful
*/
public native int InitRTPSender(long rtp_sender_handle);
/**
*获取RTP Sender RTP Socket本地端口
*
* @param rtp_sender_handle, CreateRTPSender返回值
*
* @return 失败返回0, 成功的话返回响应的端口, 请在InitRTPSender返回成功之后调用
*/
public native int GetRTPSenderLocalPort(long rtp_sender_handle);
/**
* UnInit RTP Sender
*
* @param rtp_sender_handle, CreateRTPSender返回值
*
* @return {0} if successful
*/
public native int UnInitRTPSender(long rtp_sender_handle);
/**
* 释放RTP Sender, 释放之后rtp_sender_handle就无效了,请不要再使用
*
* @param rtp_sender_handle, CreateRTPSender返回值
*
* @return {0} if successful
*/
public native int DestoryRTPSender(long rtp_sender_handle);
RTP数据接收
对应RTP Receiver(SmartPlayerJniV2.java)相关接口设计,如无语音广播或语音对讲相关技术需求,这部分可忽略:
/*
* SmartPlayerJniV2.java
* Author: https://daniusdk.com
*/
/*
* 创建RTP Receiver
*
* @param reserve:保留参数传0
*
* @return RTP Receiver 句柄,0表示失败
*/
public native long CreateRTPReceiver(int reserve);
/**
*设置 RTP Receiver传输协议
*
* @param rtp_receiver_handle, CreateRTPReceiver
* @param transport_protocol, 0:UDP, 1:TCP, 默认是UDP
*
* @return {0} if successful
*/
public native int SetRTPReceiverTransportProtocol(long rtp_receiver_handle, int transport_protocol);
/**
*设置 RTP Receiver IP地址类型
*
* @param rtp_receiver_handle, CreateRTPReceiver
* @param ip_address_type, 0:IPV4, 1:IPV6, 默认是IPV4
*
* @return {0} if successful
*/
public native int SetRTPReceiverIPAddressType(long rtp_receiver_handle, int ip_address_type);
/**
*设置 RTP Receiver RTP Socket本地端口
*
* @param rtp_receiver_handle, CreateRTPReceiver
* @param port, 必须是偶数,设置0的话SDK会自动分配, 默认值是0
*
* @return {0} if successful
*/
public native int SetRTPReceiverLocalPort(long rtp_receiver_handle, int port);
/**
*设置 RTP Receiver SSRC
*
* @param rtp_receiver_handle, CreateRTPReceiver
* @param ssrc, 如果设置的话,这个字符串要能转换成uint32类型, 否则设置失败
*
* @return {0} if successful
*/
public native int SetRTPReceiverSSRC(long rtp_receiver_handle, String ssrc);
/**
*创建 RTP Receiver 会话
*
* @param rtp_receiver_handle, CreateRTPReceiver
* @param reserve, 保留值,目前传0
*
* @return {0} if successful
*/
public native int CreateRTPReceiverSession(long rtp_receiver_handle, int reserve);
/**
*获取 RTP Receiver RTP Socket本地端口
*
* @param rtp_receiver_handle, CreateRTPReceiver
*
* @return 失败返回0, 成功的话返回响应的端口, 请在CreateRTPReceiverSession返回成功之后调用
*/
public native int GetRTPReceiverLocalPort(long rtp_receiver_handle);
/**
*设置 RTP Receiver Payload 相关信息
*
* @param rtp_receiver_handle, CreateRTPReceiver
*
* @param payload_type, 请参考 RFC 3551
*
* @param encoding_name, 编码名, 请参考 RFC 3551, 如果payload_type不是动态的, 可能传null就好
*
* @param media_type, 媒体类型, 请参考 RFC 3551, 1 是视频, 2是音频
*
* @param clock_rate, 请参考 RFC 3551
*
* @return {0} if successful
*/
public native int SetRTPReceiverPayloadType(long rtp_receiver_handle, int payload_type, String encoding_name, int media_type, int clock_rate);
/**
*设置 RTP Receiver 音频采样率
*
* @param rtp_receiver_handle, CreateRTPReceiver
* @param sampling_rate, 音频采样率
*
* @return {0} if successful
*/
public native int SetRTPReceiverAudioSamplingRate(long rtp_receiver_handle, int sampling_rate);
/**
*设置 RTP Receiver 音频通道数
*
* @param rtp_receiver_handle, CreateRTPReceiver
* @param channels, 音频通道数
*
* @return {0} if successful
*/
public native int SetRTPReceiverAudioChannels(long rtp_receiver_handle, int channels);
/**
*设置 RTP Receiver 远端地址
*
* @param rtp_receiver_handle, CreateRTPReceiver
* @param address, IP地址
* @param port, 端口
*
* @return {0} if successful
*/
public native int SetRTPReceiverRemoteAddress(long rtp_receiver_handle, String address, int port);
/**
*初始化 RTP Receiver
*
* @param rtp_receiver_handle, CreateRTPReceiver
*
* @return {0} if successful
*/
public native int InitRTPReceiver(long rtp_receiver_handle);
/**
*UnInit RTP Receiver
*
* @param rtp_receiver_handle, CreateRTPReceiver
*
* @return {0} if successful
*/
public native int UnInitRTPReceiver(long rtp_receiver_handle);
/**
*Destory RTP Receiver Session
*
* @param rtp_receiver_handle, CreateRTPReceiver
*
* @return {0} if successful
*/
public native int DestoryRTPReceiverSession(long rtp_receiver_handle);
/**
*Destory RTP Receiver
*
* @param rtp_receiver_handle, CreateRTPReceiver
*
* @return {0} if successful
*/
public native int DestoryRTPReceiver(long rtp_receiver_handle);
PostAudioPacket(SmartPlayerJniV2.java),投递音频包给外部Live source,目前仅于语音对讲使用:
/*
* SmartPlayerJniV2.java
* Author: https://daniusdk.com
*/
/**
* 投递音频包给外部Live source, 注意ByteBuffer对象必须是DirectBuffer
*
* @param handle: return value from SmartPlayerOpen()
*
* @return {0} if successful
*/
public native int PostAudioPacket(long handle, int codec_id,
java.nio.ByteBuffer packet, int offset, int size, long pts, boolean is_pts_discontinuity,
java.nio.ByteBuffer extra_data, int extra_data_offset, int extra_data_size, int sample_rate, int channels);
GB28181接口调用
对应GB28181相关接口调用相关设计如下:
/*
* SmartPublisherJniV2.java
* Author: https://daniusdk.com
*/
/**
* 设置GB28181 RTP Sender
*
* @param rtp_sender_handle, CreateRTPSender返回值
* @param rtp_payload_type, 对于GB28181 PS, 协议定义是96, 具体以SDP为准, RFC 3551有定义
* @param encoding_name, 编码名, 请参考 RFC 3551, 当前仅支持: "PS", 其他值返回失败
* @return {0} if successful
*/
public native int SetGB28181RTPSender(long handle, long rtp_sender_handle, int rtp_payload_type, String encoding_name);
/**
* 设置GB28181 RTP 收到的音频包回调
* @param handle
* @param audio_packet_callback
* @return
*/
public native int SetGB28181ReceiveAudioPacketCallback(long handle, NTAudioPacketCallback audio_packet_callback);
/**
* 启动 GB28181 媒体流
*
* @return {0} if successful
*/
public native int StartGB28181MediaStream(long handle);
/**
* 停止 GB28181 媒体流
*
* @return {0} if successful
*/
public native int StopGB28181MediaStream(long handle);
接口调示例代码
private boolean initGB28181Agent() {
if ( gb28181_agent_ != null )
return true;
getLocation(context_);
String local_ip_addr = IPAddrUtils.getIpAddress(context_);
Log.i(TAG, "initGB28181Agent local ip addr: " + local_ip_addr);
if ( local_ip_addr == null || local_ip_addr.isEmpty() ) {
Log.e(TAG, "initGB28181Agent local ip is empty");
return false;
}
gb28181_agent_ = GBSIPAgentFactory.getInstance().create();
if ( gb28181_agent_ == null ) {
Log.e(TAG, "initGB28181Agent create agent failed");
return false;
}
gb28181_agent_.addListener(this);
gb28181_agent_.addPlayListener(this);
gb28181_agent_.addAudioBroadcastListener(this);
gb28181_agent_.addDeviceControlListener(this);
gb28181_agent_.addQueryCommandListener(this);
// 必填信息
gb28181_agent_.setLocalAddress(local_ip_addr);
gb28181_agent_.setServerParameter(gb28181_sip_server_addr_, gb28181_sip_server_port_, gb28181_sip_server_id_, gb28181_sip_domain_);
gb28181_agent_.setUserInfo(gb28181_sip_username_, gb28181_sip_password_);
//gb28181_agent_.setUserInfo(gb28181_sip_username_, gb28181_sip_username_, gb28181_sip_password_);
// 可选参数
gb28181_agent_.setUserAgent(gb28181_sip_user_agent_filed_);
gb28181_agent_.setTransportProtocol(gb28181_sip_trans_protocol_==0?"UDP":"TCP");
// GB28181配置
gb28181_agent_.config(gb28181_reg_expired_, gb28181_heartbeat_interval_, gb28181_heartbeat_count_);
com.gb.ntsignalling.Device gb_device = new com.gb.ntsignalling.Device("34020000001380000001", "安卓测试设备", Build.MANUFACTURER, Build.MODEL,
"宇宙","火星1","火星", true);
if (mLongitude != null && mLatitude != null) {
com.gb.ntsignalling.DevicePosition device_pos = new com.gb.ntsignalling.DevicePosition();
device_pos.setTime(mLocationTime);
device_pos.setLongitude(mLongitude);
device_pos.setLatitude(mLatitude);
gb_device.setPosition(device_pos);
gb_device.setSupportMobilePosition(true); // 设置支持移动位置上报
}
gb28181_agent_.addDevice(gb_device);
/*
com.gb28181.ntsignalling.Device gb_device1 = new com.gb28181.ntsignalling.Device("34020000001380000002", "安卓测试设备2", Build.MANUFACTURER, Build.MODEL,
"宇宙","火星1","火星", true);
if (mLongitude != null && mLatitude != null) {
com.gb28181.ntsignalling.DevicePosition device_pos = new com.gb28181.ntsignalling.DevicePosition();
device_pos.setTime(mLocationTime);
device_pos.setLongitude(mLongitude);
device_pos.setLatitude(mLatitude);
gb_device1.setPosition(device_pos);
gb_device1.setSupportMobilePosition(true);
}
gb28181_agent_.addDevice(gb_device1);
*/
if (!gb28181_agent_.createSipStack()) {
gb28181_agent_ = null;
Log.e(TAG, "initGB28181Agent gb28181_agent_.createSipStack failed.");
return false;
}
boolean is_bind_local_port_ok = false;
// 最多尝试5000个端口
int try_end_port = gb28181_sip_local_port_base_ + 5000;
try_end_port = try_end_port > 65536 ?65536: try_end_port;
for (int i = gb28181_sip_local_port_base_; i < try_end_port; ++i) {
if (gb28181_agent_.bindLocalPort(i)) {
is_bind_local_port_ok = true;
break;
}
}
if (!is_bind_local_port_ok) {
gb28181_agent_.releaseSipStack();
gb28181_agent_ = null;
Log.e(TAG, "initGB28181Agent gb28181_agent_.bindLocalPort failed.");
return false;
}
if (!gb28181_agent_.initialize()) {
gb28181_agent_.unBindLocalPort();
gb28181_agent_.releaseSipStack();
gb28181_agent_ = null;
Log.e(TAG, "initGB28181Agent gb28181_agent_.initialize failed.");
return false;
}
return true;
}
invite处理逻辑
@Override
public void ntsOnInvitePlay(String deviceId, SessionDescription session_des) {
handler_.postDelayed(new Runnable() {
@Override
public void run() {
// 先振铃响应下
gb28181_agent_.respondPlayInvite(180, device_id_);
MediaSessionDescription video_des = null;
SDPRtpMapAttribute ps_rtpmap_attr = null;
// 28181 视频使用PS打包
Vector<MediaSessionDescription> video_des_list = session_des_.getVideoPSDescriptions();
if (video_des_list != null && !video_des_list.isEmpty()) {
for(MediaSessionDescription m : video_des_list) {
if (m != null && m.isValidAddressType() && m.isHasAddress() ) {
video_des = m;
ps_rtpmap_attr = video_des.getPSRtpMapAttribute();
break;
}
}
}
if (null == video_des) {
gb28181_agent_.respondPlayInvite(488, device_id_);
Log.i(TAG, "ntsOnInvitePlay get video description is null, response 488, device_id:" + device_id_);
return;
}
if (null == ps_rtpmap_attr) {
gb28181_agent_.respondPlayInvite(488, device_id_);
Log.i(TAG, "ntsOnInvitePlay get ps rtp map attribute is null, response 488, device_id:" + device_id_);
return;
}
Log.i(TAG,"ntsOnInvitePlay, device_id:" +device_id_+", is_tcp:" + video_des.isRTPOverTCP()
+ " rtp_port:" + video_des.getPort() + " ssrc:" + video_des.getSSRC()
+ " address_type:" + video_des.getAddressType() + " address:" + video_des.getAddress());
long rtp_sender_handle = libPublisher.CreateRTPSender(0);
if ( rtp_sender_handle == 0 ) {
gb28181_agent_.respondPlayInvite(488, device_id_);
Log.i(TAG, "ntsOnInvitePlay CreateRTPSender failed, response 488, device_id:" + device_id_);
return;
}
gb28181_rtp_payload_type_ = ps_rtpmap_attr.getPayloadType();
gb28181_rtp_encoding_name_ = ps_rtpmap_attr.getEncodingName();
libPublisher.SetRTPSenderTransportProtocol(rtp_sender_handle, video_des.isRTPOverUDP()?0:1);
libPublisher.SetRTPSenderIPAddressType(rtp_sender_handle, video_des.isIPv4()?0:1);
libPublisher.SetRTPSenderLocalPort(rtp_sender_handle, 0);
libPublisher.SetRTPSenderSSRC(rtp_sender_handle, video_des.getSSRC());
libPublisher.SetRTPSenderSocketSendBuffer(rtp_sender_handle, 2*1024*1024); // 设置到2M
libPublisher.SetRTPSenderClockRate(rtp_sender_handle, ps_rtpmap_attr.getClockRate());
libPublisher.SetRTPSenderDestination(rtp_sender_handle, video_des.getAddress(), video_des.getPort());
if ( libPublisher.InitRTPSender(rtp_sender_handle) != 0 ) {
gb28181_agent_.respondPlayInvite(488, device_id_);
libPublisher.DestoryRTPSender(rtp_sender_handle);
return;
}
int local_port = libPublisher.GetRTPSenderLocalPort(rtp_sender_handle);
if (local_port == 0) {
gb28181_agent_.respondPlayInvite(488, device_id_);
libPublisher.DestoryRTPSender(rtp_sender_handle);
return;
}
Log.i(TAG,"get local_port:" + local_port);
String local_ip_addr = IPAddrUtils.getIpAddress(context_);
MediaSessionDescription local_video_des = new MediaSessionDescription(video_des.getType());
local_video_des.addFormat(String.valueOf(ps_rtpmap_attr.getPayloadType()));
local_video_des.addRtpMapAttribute(ps_rtpmap_attr);
local_video_des.setAddressType(video_des.getAddressType());
local_video_des.setAddress(local_ip_addr);
local_video_des.setPort(local_port);
local_video_des.setTransportProtocol(video_des.getTransportProtocol());
local_video_des.setSSRC(video_des.getSSRC());
if (!gb28181_agent_.respondPlayInviteOK(device_id_,local_video_des) ) {
libPublisher.DestoryRTPSender(rtp_sender_handle);
Log.e(TAG, "ntsOnInvitePlay call respondPlayInviteOK failed.");
return;
}
gb28181_rtp_sender_handle_ = rtp_sender_handle;
}
private String device_id_;
private SessionDescription session_des_;
public Runnable set(String device_id, SessionDescription session_des) {
this.device_id_ = device_id;
this.session_des_ = session_des;
return this;
}
}.set(deviceId, session_des),0);
}
ack处理逻辑
@Override
public void ntsOnAckPlay(String deviceId) {
handler_.postDelayed(new Runnable() {
@Override
public void run() {
Log.i(TAG,"ntsOnACKPlay, device_id:" +device_id_);
if (!isRTSPPublisherRunning && !isPushingRtmp && !isRecording) {
InitAndSetConfig();
}
libPublisher.SetGB28181RTPSender(publisherHandle, gb28181_rtp_sender_handle_, gb28181_rtp_payload_type_, gb28181_rtp_encoding_name_);
//libPublisher.SetGBTCPConnectTimeout(publisherHandle, 10*60*1000);
//libPublisher.SetGBInitialTCPReconnectInterval(publisherHandle, 1000);
//libPublisher.SetGBInitialTCPMaxReconnectAttempts(publisherHandle, 3);
int startRet = libPublisher.StartGB28181MediaStream(publisherHandle);
if (startRet != 0) {
if (!isRTSPPublisherRunning && !isPushingRtmp && !isRecording) {
if (publisherHandle != 0) {
long handle = publisherHandle;
publisherHandle = 0;
libPublisher.SmartPublisherClose(handle);
}
}
destoryRTPSender();
Log.e(TAG, "Failed to start GB28181 service..");
return;
}
if (!isRTSPPublisherRunning && !isPushingRtmp && !isRecording) {
CheckInitAudioRecorder();
}
startLayerPostThread();
isGB28181StreamRunning = true;
}
private String device_id_;
public Runnable set(String device_id) {
this.device_id_ = device_id;
return this;
}
}.set(deviceId),0);
}
总结
Android平台GB28181设备接入模块设计,需要考虑的点非常多,除了常规的信令和媒体交互设计外,对接调试也非常耗时耗力,好多做国标平台的厂商,出于对协议的了解程度或实现等各方面的因素,好多时候并没有完全按照规范来,需要酌情兼容,此外,特别是执法记录仪等场景下,需要考虑好的视频编码效率、网络重连等,做个demo容易,做个产品真的非常考验开发者。
标签:handle,String,GB28181,param,接入,int,rtp,gb28181,Android From: https://blog.51cto.com/daniusdk/6664085