编译环境:Ubuntu16.04 64位
交叉编译工具:arm-hisiv500-linux-gcc

最近需要在hi3519实现RtspServer,以便于推流。
ps1:这里记录一下工作过程,目前还未完成。
网上可以找到很多开源的RtspServer实现,需要做性能测试,也有假开源(例如EasyIPCamera,只放demo源码,没放sdk源码,而且sdk还被加密了)。
ps2:性能测试结果是延时都比较大,打算自己写了。
ps3:已经实现多路推流,提供库和接口,点击下载RtspServerForHisiv500

1.开源代码的修改

1.1 PHZ76/RtspServer

源代码下载地址:PHZ76/RtspServer

1.1.1 代码修改

以上代码中最后是直接编译得到rtsp_server、rtsp_pusher和rtsp_h264_file,这里我首先对代码结构和Makefile做了调整,编译静态库libAFRtsp.a以便于我的项目使用。

代码结构如下:

jerry@ubuntu:~/work/RtspServer$ tree
.
├── example
│   ├── rtsp_h264_file.cpp
│   ├── rtsp_pusher.cpp
│   └── rtsp_server.cpp
├── inc
│   ├── net
│   │   ├── Acceptor.h
│   │   ├── BufferReader.h
│   │   ├── BufferWriter.h
│   │   ├── Channel.h
│   │   ├── EpollTaskScheduler.h
│   │   ├── EventLoop.h
│   │   ├── Logger.h
│   │   ├── log.h
│   │   ├── MemoryManager.h
│   │   ├── NetInterface.h
│   │   ├── Pipe.h
│   │   ├── RingBuffer.h
│   │   ├── SelectTaskScheduler.h
│   │   ├── Socket.h
│   │   ├── SocketUtil.h
│   │   ├── TaskScheduler.h
│   │   ├── TcpConnection.h
│   │   ├── TcpServer.h
│   │   ├── TcpSocket.h
│   │   ├── ThreadSafeQueue.h
│   │   ├── Timer.h
│   │   └── Timestamp.h
│   └── xop
│       ├── AACSource.h
│       ├── G711ASource.h
│       ├── H264Parser.h
│       ├── H264Source.h
│       ├── H265Source.h
│       ├── media.h
│       ├── MediaSession.h
│       ├── MediaSource.h
│       ├── RtpConnection.h
│       ├── rtp.h
│       ├── RtspConnection.h
│       ├── rtsp.h
│       ├── RtspMessage.h
│       ├── RtspPusher.h
│       └── RtspServer.h
├── LICENSE
├── Makefile
├── pic
│   └── 1.pic.JPG
├── README.md
├── src
│   ├── net
│   │   ├── Acceptor.cpp
│   │   ├── BufferReader.cpp
│   │   ├── BufferWriter.cpp
│   │   ├── EpollTaskScheduler.cpp
│   │   ├── EventLoop.cpp
│   │   ├── Logger.cpp
│   │   ├── MemoryManager.cpp
│   │   ├── NetInterface.cpp
│   │   ├── Pipe.cpp
│   │   ├── SelectTaskScheduler.cpp
│   │   ├── SocketUtil.cpp
│   │   ├── TaskScheduler.cpp
│   │   ├── TcpConnection.cpp
│   │   ├── TcpServer.cpp
│   │   ├── TcpSocket.cpp
│   │   ├── Timer.cpp
│   │   └── Timestamp.cpp
│   └── xop
│       ├── AACSource.cpp
│       ├── G711ASource.cpp
│       ├── H264Parser.cpp
│       ├── H264Source.cpp
│       ├── H265Source.cpp
│       ├── MediaSession.cpp
│       ├── RtpConnection.cpp
│       ├── RtspConnection.cpp
│       ├── RtspMessage.cpp
│       ├── RtspPusher.cpp
│       └── RtspServer.cpp
└── test.h264

8 directories, 73 files

Makefile的修改如下:

#CROSS := 
CROSS := arm-hisiv500-linux-
CC := $(CROSS)gcc
CXX := $(CROSS)g++
AR := $(CROSS)ar

LIB = AFRtsp
LIBDIR = lib
TARGET = ./$(LIBDIR)/lib$(LIB).a
OBJSDIR = objs

TARGET1 = rtsp_server
TARGET2 = rtsp_pusher
TARGET3 = rtsp_h264_file
RTSPLDFLAGS = -L./$(LIBDIR) -l$(LIB)

INCLUDE = -I./inc/net -I./inc/xop
CXXFLAGS = -std=c++11
LDFLAGS = -lpthread
#LDFLAGS = -lrt -pthread -lpthread -ldl -lm
ARFLAGS = -rc

SRC1  = $(notdir $(wildcard ./src/net/*.cpp))
OBJS1 = $(patsubst %.cpp,$(OBJSDIR)/%.o,$(SRC1))

SRC2  = $(notdir $(wildcard ./src/xop/*.cpp))
OBJS2 = $(patsubst %.cpp,$(OBJSDIR)/%.o,$(SRC2))

all: BUILD_DIR $(TARGET) $(TARGET1) $(TARGET2) $(TARGET3)

BUILD_DIR:
	@-mkdir -p $(OBJSDIR) $(LIBDIR)

$(TARGET) : $(OBJS1) $(OBJS2)
	$(AR) $(ARFLAGS) $@ $(OBJS1) $(OBJS2)

$(TARGET1) : ./example/rtsp_server.cpp
	$(CXX) $< -o $@ $(RTSPLDFLAGS) $(CXXFLAGS) $(INCLUDE) $(LDFLAGS)
$(TARGET2) : ./example/rtsp_pusher.cpp
	$(CXX) $< -o $@ $(RTSPLDFLAGS) $(CXXFLAGS) $(INCLUDE) $(LDFLAGS)
$(TARGET3) : ./example/rtsp_h264_file.cpp
	$(CXX) $< -o $@ $(RTSPLDFLAGS) $(CXXFLAGS) $(INCLUDE) $(LDFLAGS)

$(OBJSDIR)/%.o : ./src/net/%.cpp
	$(CXX) -c $< -o $@ $(CXXFLAGS) $(INCLUDE)
$(OBJSDIR)/%.o : ./src/xop/%.cpp
	$(CXX) -c $< -o $@ $(CXXFLAGS) $(INCLUDE)

.PHONY : clean
clean :
	-rm -rf $(OBJSDIR) $(LIBDIR) $(TARGET1) $(TARGET2) $(TARGET3)

使用:
编译完成后,inc目录下的头文件和lib目录下libAFRtsp.a即是我们所需要的。示例代码参考rtsp_server.cpp、rtsp_pusher.cpp和rtsp_h264_file.cpp。

使用报告:
暂无,后续完善。如果当前库无法满足需求,继续寻找其他开源库或者使用live555实现,或者完全实现。

调整后的代码下载:RtspServer实现的源码

PS:
使用过程发现bool MediaSession::addMediaSource(MediaChannelId channelId, MediaSource* source)在调用packets.emplace(id, tmpPkt);中会出现segmentation fault,最后做了如下修改:

#if 0
	if (packets.size() != 0)
	{
		memcpy(tmpPkt.data.get(), pkt.data.get(), pkt.size);
	}
	else
	{
		tmpPkt.data = pkt.data;
	}
#else
	memcpy(tmpPkt.data.get(), pkt.data.get(), pkt.size);
#endif

理论上std::shared_ptr直接赋值是可以的,不太清楚这里是为什么???
做了上述修改之后,使用VLC和PotPlayer都能收到RTSP流了。
PPS:
pushFrame的xop::AVFrame数据不包括H264和H265的NALU头(00 00 00 01或 00 00 01)。

1.1.2 测试代码

1.1.2.1 头文件
#ifndef __AF_RTSP_H__
#define __AF_RTSP_H__

#ifdef __cplusplus
extern "C" {
#endif

int AF_RtspInit();
int AF_RtspExit();
int AF_RtspPush(int nCh, unsigned char *pBuffer, int nLength, int bKey);

#ifdef __cplusplus
}
#endif

#endif// __AF_RTSP_H__

1.1.2.2 测试代码
#include <pthread.h>
#include "xop/RtspServer.h"
#include "net/NetInterface.h"
#include "afrtsp.h"

typedef struct tag_AF_RTSP_INFO {
	xop::MediaSessionId SessionId;// 会话句柄
	unsigned int nClients;// 客户端数量
	char rtspUrl[64];
}AF_RTSP_INFO;

static pthread_t g_nThreadID;
static pthread_mutex_t g_Mutex;
static xop::RtspServer *g_pRtspServer = NULL;
static AF_RTSP_INFO g_RtspInfo[4] = { 0 };
static xop::EventLoop *g_pEventLoop = NULL;

static void *AF_RtspThread(void *p)
{
	int clients = 0;
	std::string rtspUrl;

	std::string ip = xop::NetInterface::getLocalIPAddress(); //获取网卡ip地址
	g_pEventLoop = new xop::EventLoop();
	g_pRtspServer = new xop::RtspServer(g_pEventLoop, ip, 554);//创建一个RTSP服务器

	// live通道
	xop::MediaSession *session = xop::MediaSession::createNew("live");
	snprintf(g_RtspInfo[0].rtspUrl, sizeof(g_RtspInfo[0].rtspUrl), "rtsp://%s/%s", ip.c_str(), session->getRtspUrlSuffix().c_str());
	rtspUrl = "rtsp://" + ip + "/" + session->getRtspUrlSuffix();

	// 添加音视频流到媒体会话, track0:h265, track1:aac
	session->addMediaSource(xop::channel_0, xop::H265Source::createNew());
//	session->addMediaSource(xop::channel_1, xop::AACSource::createNew(44100,2));

	// 设置通知回调函数。 在当前会话中, 客户端连接或断开会通过回调函数发起通知
	session->setNotifyCallback([&clients, &rtspUrl](xop::MediaSessionId sessionId, uint32_t numClients) {
		pthread_mutex_lock(&g_Mutex);
		g_RtspInfo[0].nClients = clients = numClients; //获取当前媒体会话客户端数量
		std::cout << "[" << g_RtspInfo[0].rtspUrl << "]" << " Online: " << g_RtspInfo[0].nClients << std::endl;
		pthread_mutex_unlock(&g_Mutex);
	});

	std::cout << "URL: " << g_RtspInfo[0].rtspUrl << std::endl;

	g_RtspInfo[0].SessionId = g_pRtspServer->addMeidaSession(session);

	g_pEventLoop->loop();

	return NULL;
}

int AF_RtspInit()
{
	if (g_pRtspServer != NULL)
		return -1;

	if (g_pEventLoop != NULL)
		return -1;

	pthread_mutex_init(&g_Mutex, NULL);

	return pthread_create(&g_nThreadID, 0, AF_RtspThread, NULL);
}

int AF_RtspExit()
{
	pthread_mutex_destroy(&g_Mutex);
	if (g_pRtspServer != NULL) {
		pthread_join(g_nThreadID, 0);
		// 服务和会话的销毁
		
	}

	return 0;
}

int AF_RtspPush(int nCh, unsigned char *pBuffer, int nLength, int bKey)
{
	if (nCh != 0)//暂时只测试xop::MediaSession live通道
		return 0;

	pthread_mutex_lock(&g_Mutex);
	if (g_RtspInfo[0].nClients > 0) {
		xop::AVFrame videoFrame = { 0 };
		videoFrame.type = bKey ? xop::VIDEO_FRAME_I : xop::VIDEO_FRAME_P;
		videoFrame.size = nLength - 4;		
		videoFrame.timestamp = xop::H265Source::getTimeStamp();
		videoFrame.buffer.reset(new uint8_t[videoFrame.size]);
		memcpy(videoFrame.buffer.get(), pBuffer + 4, videoFrame.size);
		bool bRet = g_pRtspServer->pushFrame(g_RtspInfo[0].SessionId, xop::channel_0, videoFrame);
		if (!bRet) {
			printf("pushFrame failed\n");
		}
	}
	pthread_mutex_unlock(&g_Mutex);

	return 0;
}

以上代码仅供测试使用,如有疑问或者错漏之处,敬请留言指正。

1.2 live555

源代码下载地址:live555

1.2.1 交叉编译

添加配置文件:代码目录下存在很多config.xxx的配置文件,我这里是hi3519,选择比较接近的config.armlinux做拷贝并修改文件名为config.hi3519,

CROSS_COMPILE?=		arm-elf-

修改为

CROSS_COMPILE?=		arm-hisiv500-linux-

生成Makefile:liveMedia和mediaServer等目录下都不存在Makefile文件,只有Makefile.head和Makefile.tail,需要通过运行genMakefiles脚本生成Makefile
执行

./genMakefiles hi3519

就会在各个目录下生成Makefile

编译:
执行

make

发现报错,如下

../liveMedia/libliveMedia.a(Locale.o): In function `Locale::~Locale()':
Locale.cpp:(.text+0x20): undefined reference to `uselocale'
Locale.cpp:(.text+0x28): undefined reference to `freelocale'
../liveMedia/libliveMedia.a(Locale.o): In function `Locale::Locale(char const*, LocaleCategory)':
Locale.cpp:(.text+0x80): undefined reference to `newlocale'
Locale.cpp:(.text+0x88): undefined reference to `uselocale'
collect2: error: ld returned 1 exit status

查看源码,发现Locale的构造和析构用宏LOCALE_NOT_USED包含起来,继续修改config.hi3519

COMPILE_OPTS =		$(INCLUDES) -I. -O2 -DSOCKLEN_T=socklen_t -DNO_SSTREAM=1 -D_LARGEFILE_SOURCE=1 -D_FILE_OFFSET_BITS=64

修改为

COMPILE_OPTS =		$(INCLUDES) -I. -O2 -DSOCKLEN_T=socklen_t -DNO_SSTREAM=1 -D_LARGEFILE_SOURCE=1 -D_FILE_OFFSET_BITS=64 -DLOCALE_NOT_USED

重新执行

 ./genMakefiles hi3519
 make clean && make

编译完成,得到静态库libliveMedia.a、libgroupsock.a、libBasicUsageEnvironment.a和libUsageEnvironment.a,以及可执行程序live555MediaServer、live555ProxyServer和testProgs目录下的可执行程序。

1.2.2 测试live555MediaServer

将live555MediaServer拷贝到开发板,
执行

/media # ./live555MediaServer 
LIVE555 Media Server
        version 0.92 (LIVE555 Streaming Media library version 2018.08.28).
Play streams from this server using the URL
        rtsp://0.0.0.0/<filename>
where <filename> is a file present in the current directory.
Each file's type is inferred from its name suffix:
        ".264" => a H.264 Video Elementary Stream file
        ".265" => a H.265 Video Elementary Stream file
        ".aac" => an AAC Audio (ADTS format) file
        ".ac3" => an AC-3 Audio file
        ".amr" => an AMR Audio file
        ".dv" => a DV Video file
        ".m4e" => a MPEG-4 Video Elementary Stream file
        ".mkv" => a Matroska audio+video+(optional)subtitles file
        ".mp3" => a MPEG-1 or 2 Audio file
        ".mpg" => a MPEG-1 or 2 Program Stream (audio+video) file
        ".ogg" or ".ogv" or ".opus" => an Ogg audio and/or video file
        ".ts" => a MPEG Transport Stream file
                (a ".tsx" index file - if present - provides server 'trick play' support)
        ".vob" => a VOB (MPEG-2 video with AC-3 audio) file
        ".wav" => a WAV Audio file
        ".webm" => a WebM audio(Vorbis)+video(VP8) file
See http://www.live555.com/mediaServer/ for additional documentation.
(We use port 8000 for optional RTSP-over-HTTP tunneling, or for HTTP live streaming (for indexed Transport Stream files only).)

可以看到支持的文件格式,我这里使用264格式的文件做测试,将test1.264直接拷贝到开发板上live555MediaServer所在的目录下,开发板IP192.168.1.21
PC上使用VLC打开网络串流,输入rtsp://192.168.1.21:554/test1.264,提示:

Unable to determine our source address: This computer has an invalid IP address: 0.0.0.0

最后定位是GroupsockHelper.cpp的ourIPAddress接口获取设备IP失败,我这里为了先测试,直接修改如下:

// Make sure we have a good address:
netAddressBits from = fromAddr.sin_addr.s_addr;

修改为

fromAddr.sin_addr.s_addr = our_inet_addr("192.168.1.21");
// Make sure we have a good address:
netAddressBits from = fromAddr.sin_addr.s_addr;

先直接写死设备IP做测试。重新运行live555MediaServer,VLC连接成功。

基于Live555的RTSP实时流传输参考资料:
【视频开发】【Live555】live555实现h264码流RTSP传输

【视频开发】【Live555】通过live555实现H264 RTSP直播

实时流测试延时较高,打算自己实现了。

2. 我的实现

2.1 sample代码

头文件:

#ifndef __AF_RTSP_H__
#define __AF_RTSP_H__

#ifdef __cplusplus
extern "C" {
#endif

#include "JLRtspAPI.h"

int AF_RtspInit();//初始化服务
int AF_RtspExit();//去初始化
int AF_RtspPush(int nCh, JL_RtspFrame *pstFrame);//推送数据
int AF_RtspStopChannel(int nCh);//服务端主动关闭流

#ifdef __cplusplus
}
#endif

#endif// __AF_RTSP_H__

代码部分:

#include <stdio.h>
#include <string.h>
#include "afrtsp.h"

#define AF_RTSP_PORT 554

static int g_RtspMapInfo[AF_Venc_MAX] = { 0 };
static int g_RtspChannelNum = 0;

static int AF_RtspCh2Id(int nCh)
{
	int i = 0;
	for (i = 0; i < g_RtspChannelNum; i++) {
		if (g_RtspMapInfo[i] == nCh)
			return i;
	}

	return -1;
}

static int AF_RtspMapInit()
{
	int nNum = 0;

	g_RtspMapInfo[nNum] = AF_Venc_Live;
	nNum++;

#if __AF_INFRARED_CAM_ENABLE__
	g_RtspMapInfo[nNum] = AF_Venc_Infrared;
	nNum++;
#endif

	g_RtspMapInfo[nNum] = AF_Venc_AI;
	nNum++;

#if __AF_OPT_FLOW_VENC_ENABLE__
	g_RtspMapInfo[nNum] = AF_Venc_OpticalFlow;
	nNum++;
#endif

	return nNum;
}

// 通道和ID建立对应关系
// ID是rtspserver内部的资源,从0开始递增
/* eg. 	nCh=0--->nId=0
		nCh=3--->nId=1
		nCh=4--->nId=2
对应代码JL_RtspChannelInfo
		nCh=0---> .id=0 .name="/live"
		nCh=3---> .id=1 .name="/ch3"
		nCh=4---> .id=2 .name="/ch4"
*/
int AF_RtspInit()
{
	g_RtspChannelNum = AF_RtspMapInit();
	JL_RtspChannelInfo stRtspInfo[g_RtspChannelNum];
	int i = 0;
	for (i = 0; i < g_RtspChannelNum; i++) {
		switch (g_RtspMapInfo[i]) {
			case AF_Venc_Live:
				sprintf(stRtspInfo[i].name,"/live");
				break;
			case AF_Venc_Infrared:
				sprintf(stRtspInfo[i].name,"/ch3");
				break;
			case AF_Venc_AI:
				sprintf(stRtspInfo[i].name,"/ch4");
				break;
			case AF_Venc_OpticalFlow:
				sprintf(stRtspInfo[i].name,"/ch5");
				break;
			default :
				printf("g_RtspMapInfo Error!\n");
				break;
		}
		stRtspInfo[i].id = i;
	}

	return JL_RtspStart(g_RtspChannelNum, AF_RTSP_PORT, stRtspInfo);
}

int AF_RtspExit()
{
	return JL_RtspStop();
}

int AF_RtspPush(int nCh, JL_RtspFrame *pstFrame)
{
	int nID = AF_RtspCh2Id(nCh);
	if (nID < 0)
		return -1;

//	if (nCh == 0)
//		JL_RtspFrameDump(pstFrame);

	return JL_RtspSend(nID, pstFrame);
}

int AF_RtspStopChannel(int nCh)
{
	int nID = AF_RtspCh2Id(nCh);
	if (nID >= 0) {
		return JL_RtspStopSession(nID);
	}
	return -1;
}

hi3519v101中推流接口的调用:

static int AF_VencPushFrame(int nCh, unsigned char *pBuffer, int nLength, VENC_STREAM_S *pstStream)
{
	JL_RtspFrame stFrame;
	memset(&stFrame, 0, sizeof(stFrame));
	stFrame.pBuffer = pBuffer;
	stFrame.nLength = nLength;
	
	AF_EncParam stEncParam;
	AF_GetEncParam(nCh, &stEncParam);
	int enRefType = 0;
	switch (stEncParam.enEnc) {
		case AF_Enc_H264:
			stFrame.nCodec = JL_RtspCodecType_H264;
			stFrame.nVINum = 0;
			stFrame.nPBNum = 0;
			
			enRefType = pstStream->stH264Info.enRefType;
			break;
		case AF_Enc_H265:
			stFrame.nCodec = JL_RtspCodecType_H265;
			stFrame.nVINum = 0;
			stFrame.nPBNum = 0;

			enRefType = pstStream->stH265Info.enRefType;
			break;
		case AF_Enc_H264P:
			stFrame.nCodec = JL_RtspCodecType_H264P;
			stFrame.nVINum = 1;
			stFrame.nPBNum = 0;// 暂时未加入PB帧

			enRefType = pstStream->stH264Info.enRefType;
			break;
		case AF_Enc_H265P:
			stFrame.nCodec = JL_RtspCodecType_H265P;
			stFrame.nVINum = 1;
			stFrame.nPBNum = 0;// 暂时未加入PB帧

			enRefType = pstStream->stH265Info.enRefType;
			break;
	}

	switch (enRefType) {
		case BASE_IDRSLICE:
			stFrame.nFrame = JL_RtspFrameType_I;
			break;
		case BASE_PSLICE_REFTOIDR:
			stFrame.nFrame = JL_RtspFrameType_VI;
			break;
		case BASE_PSLICE_REFBYBASE:
		case BASE_PSLICE_REFBYENHANCE:
			if ((pstStream->pstPack[0].DataType.enH264EType == H264E_NALU_SPS) || (pstStream->pstPack[0].DataType.enH265EType == H265E_NALU_VPS)) {
				stFrame.nFrame = JL_RtspFrameType_I;
			} else {
				stFrame.nFrame = JL_RtspFrameType_P;
			}
			break;
		case ENHANCE_PSLICE_REFBYENHANCE:
		case ENHANCE_PSLICE_NOTFORREF:
		default:
			stFrame.nFrame = JL_RtspFrameType_PB;
			break;
	}	

	unsigned int nWidth, nHeight;
	AF_Res2WH(stEncParam.enRes, &nWidth, &nHeight);
	stFrame.nWidth = nWidth;
	stFrame.nHeight = nHeight;
	stFrame.nRealFps = stEncParam.nFps;

	return AF_RtspPush(nCh, &stFrame);
}

2.2 性能测试

初步测试,在同时推送4路码流(20Mbps)时,延时在80ms左右。库代码内部写死分配了40M的缓冲区,支持H264/H264+,H265/H265+。
点击下载RtspServerForHisiv500

2.3 组播扩展

后续加入了组播的支持,VLC和PotPlayer测试对比如下:
VLC和PotPlayer组播对比图1

VLC和PotPlayer组播对比图2
服务端发送了组播地址,但是PotPlayer仍然使用单播方式TCP连接:

c=IN IP4 239.168.1.21/127

...

Transport: RTP/AVP/TCP;unicast;interleaved=0-1

注意:仅提供静态库用作测试,代码非开源,协议中包含个人签名Jax.Liao,严禁商用,如有疑问,请留言。如有错漏之处,敬请指正。

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