移植ZLMediaKit 工具到 Hi3516DV500 平台

ZLMediaKit是一款开源的流媒体服务器，支持RTSP、RTMP、HTTP、HLS、MPEG-TS等多种协议，可以实现音视频的推流、转码、录制、播放等功能。它采用C++语言编写，具有高性能、低延迟、易扩展等特点，适用于直播、视频会议、监控等场景。ZLMediaKit可以运行在Linux、Windows等操作系统上，支持多种硬件平台，如x86、ARM等。

ZLMediaKit 是一款类似于live555的工具，可以用来实现rtsp服务器的功能，且提供c 版本的api，使用起来十分简单，很容易上手。

传送门：
https://github.com/ZLMediaKit/ZLMediaKit
https://gitee.com/xia-chu/ZLMediaKit?_from=gitee_search
https://github.com/ZLMediaKit/ZLMediaKit/wiki/%E5%BF%AB%E9%80%9F%E5%BC%80%E5%A7%8B

把安装包下载下来，开始准备编译。（这里默认用户已经配置好hi3516DV500 工具链环境）

#国内用户推荐从同步镜像网站gitee下载 
git clone --depth 1 https://gitee.com/xia-chu/ZLMediaKit
cd ZLMediaKit
#千万不要忘记执行这句命令
git submodule update --init

我们修改CMakeLists.txt 文件后进行交叉编译即可，需要修改两个地方，一个是指定编译工具链，还有一个是指定已经交叉编译过的openssl库，其他库的话则需要看自己功能需要自行交叉编译添加修改啦，只有openssl是一定要有的。

$ git diff CMakeLists.txt
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 39c6c517..959bf431 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,6 +28,18 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

 project(ZLMediaKit LANGUAGES C CXX)

+
+# hi3516dv500
+SET(CMAKE_SYSTEM_NAME Linux)
+SET(CMAKE_SYSTEM_PROCESSOR aarch64)
+set(CMAKE_C_COMPILER aarch64-v01c01-linux-musl-gcc)
+set(CMAKE_CXX_COMPILER aarch64-v01c01-linux-musl-g++)
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+
+
 # 使能 C++11
 set(CMAKE_CXX_STANDARD 11)

@@ -362,21 +374,24 @@ if(JEMALLOC_FOUND)
   endif ()
 endif()

+# 指定3516dv500 openssl
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/openssl/include)
+update_cached_list(MK_LINK_LIBRARIES ${CMAKE_CURRENT_SOURCE_DIR}/openssl/lib/libssl.so ${CMAKE_CURRENT_SOURCE_DIR}/openssl/lib/libcrypto.so)
 # 查找 openssl 是否安装
-find_package(OpenSSL QUIET)
-if(OPENSSL_FOUND AND ENABLE_OPENSSL)
-  message(STATUS "found library: ${OPENSSL_LIBRARIES}, ENABLE_OPENSSL defined")
-  include_directories(${OPENSSL_INCLUDE_DIR})
-  update_cached_list(MK_COMPILE_DEFINITIONS ENABLE_OPENSSL)
-  update_cached_list(MK_LINK_LIBRARIES ${OPENSSL_LIBRARIES})
-  if(CMAKE_SYSTEM_NAME MATCHES "Linux" AND OPENSSL_USE_STATIC_LIBS)
-    update_cached_list(MK_LINK_LIBRARIES ${CMAKE_DL_LIBS})
-  endif()
-else()
-  set(ENABLE_OPENSSL OFF)
-  set(ENABLE_WEBRTC OFF)
-  message(WARNING "openssl 未找到, rtmp 将不支持 flash 播放器, https/wss/rtsps/rtmps/webrtc 也将失效")
-endif()
+# find_package(OpenSSL QUIET)
+# if(OPENSSL_FOUND AND ENABLE_OPENSSL)
+#   message(STATUS "found library: ${OPENSSL_LIBRARIES}, ENABLE_OPENSSL defined")
+#   include_directories(${OPENSSL_INCLUDE_DIR})
+#   update_cached_list(MK_COMPILE_DEFINITIONS ENABLE_OPENSSL)
+#   update_cached_list(MK_LINK_LIBRARIES ${OPENSSL_LIBRARIES})
+#   if(CMAKE_SYSTEM_NAME MATCHES "Linux" AND OPENSSL_USE_STATIC_LIBS)
+#     update_cached_list(MK_LINK_LIBRARIES ${CMAKE_DL_LIBS})
+#   endif()
+# else()
+#   set(ENABLE_OPENSSL OFF)
+#   set(ENABLE_WEBRTC OFF)
+#   message(WARNING "openssl 未找到, rtmp 将不支持 flash 播放器, https/wss/rtsps/rtmps/webrtc 也将失效")
+# endif()

 # 查找 mysql 是否安装
 find_package(MYSQL QUIET)

然后我们就可以开始编译去生成库了。

mkdir build;cd build
cmake ..
make -j6

生成完后的c api 目录文件如下

ZLMediaKit/api/include
ZLMediaKit/release/linux/Debug/libmk_api.so

我们把这些拉到自己的代码那边去使用即可了。

/*
 * @Author: Tr.
 * @ObjectDescription: 
 * @Date: 2023-10-27 15:04:01
 * @LastEditors: Tr.
 * @LastEditTime: 2023-11-02 14:24:01
 */
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <limits.h>
#include <stddef.h>
#include <sys/shm.h>
#include <stdio.h>
#include <stdlib.h>
#include <semaphore.h>
#include <signal.h>
#include <sys/prctl.h>
#include "mk_mediakit.h"

static mk_media media;
static int dts = 0;
#define FRAME_BUF_SIZE  (2560*1024)
typedef unsigned int            HI_U32;

typedef struct userSHARE_BUF_S
{
   int written; // 作为一个标志，非0：表示可读，0：表示可写
    HI_U32 u32BufSize;
    char videobuf[FRAME_BUF_SIZE]; // 记录写入 和 读取 的文本
}shared_use_st;


int main()
{
    printf("ZLMeidaKit RTSP!\n");

    //zlmedia
    mk_config config;
    config.ini = NULL;
    config.ini_is_path =1;
    config.log_level = 0;
    config.log_mask = LOG_CONSOLE;
    config.log_file_path = NULL;
    config.log_file_days = 0;
    config.ssl = NULL;
    config.ssl_is_path = 1;
    config.ssl_pwd = NULL;
    config.thread_num = 2;

    mk_env_init(&config);
    //mk_http_server_start(80, 0);
    mk_rtsp_server_start(554, 0);
    //mk_rtmp_server_start(1935, 0);

    //signal(SIGINT, s_on_exit);// 设置退出信号

    media = mk_media_create("__defaultVhost__", "live", "test", 0, 0, 0);
    //h264的codec
    //mk_media_init_video(media, 0, 0, 0, 0, 2 * 104 * 1024);
    codec_args v_args={0};
    mk_track v_track = mk_track_create(MKCodecH265, &v_args);
    mk_media_init_track(media,v_track);
    mk_media_init_complete(media);
    mk_track_unref(v_track);

    //h264
    char *m_pFrameBuffer;
    int shmid;

    m_pFrameBuffer = new char[FRAME_BUF_SIZE];
    if(m_pFrameBuffer == NULL)
    {
        printf("[MEDIA SERVER] error malloc data buffer failed\n");
        return 0;
    }
    memset(m_pFrameBuffer,0,FRAME_BUF_SIZE);

    shmid = shmget((key_t)1234, sizeof(shared_use_st), 0666|IPC_CREAT);
    if (shmid == -1)
    {
        printf("get shmid failed!\n");
        return 0;
    }
    m_pFrameBuffer = (char*)shmat(shmid, NULL, SHM_RND);
    if ((char*)m_pFrameBuffer == (void *)-1)
    {
        printf("open sharebuf failed!\n");
        return 0;
    }
    shared_use_st *pFrameHead  = reinterpret_cast<shared_use_st *>(m_pFrameBuffer); // m_pFrameBuffer是共享内存    

    // FILE *fp = fopen("1.h265", "w");

    while(1)
    {
        while (pFrameHead->written == 0)
            usleep(10000);
        if (pFrameHead->written == 1)
        {
            mk_frame frame = mk_frame_create(MKCodecH265, dts, dts, pFrameHead->videobuf, pFrameHead->u32BufSize, NULL, NULL);
            dts += 1;
            mk_media_input_frame((mk_media) media, frame);
            mk_frame_unref(frame);

            // printf ("%d\n", pFrameHead->u32BufSize);

            // fwrite(pFrameHead->videobuf, pFrameHead->u32BufSize, 1, fp);

            pFrameHead->written = 0;
        }

        // usleep(5000);
    }

    // fclose(fp);
    mk_media_release(media);
    mk_stop_all_server();
}

供大家参考，主要是从共享内存读取已经编译好的摄像头h264数据再推送到zlmediakit搭建的rtsp服务器上。