海思媒体处理平台VI视频输入模块

落日映苍穹つ 2022-05-27 13:13 487阅读 0赞

# 海思媒体处理平台VI视频输入模块 #

**\[Hi3516A||Vi视频输入||海思媒体处理平台\]**

### 文章目录 ###

*  海思媒体处理平台VI视频输入模块
 *   *  VI模块的概念
     *  VI模块的功能、作用、内部单元工作流程
     *   *  硬件单元功能框图
         *  VI内部单元工作流程
         *  VIU视频采集单元
     *  参阅Api实现VI
     *   *  main.c
         *  My\_Head.h
         *  Makefile
     *  通过其他设置接口增加功能

--------------------

## VI模块的概念 ##

**Vi**是海思媒体处理平台的视频输入模块,负责捕获视频图像,可对其进行剪切、缩放等处理,并输出多路不同分辨率的图像数据.

## VI模块的功能、作用、内部单元工作流程 ##

### 硬件单元功能框图 ###

> Hi3516A/Hi3518EV200/Hi3519V200 VI硬件单元功能框图.

![Alt text][]

VI可通过ITU-R BT656/601/1120 接口或 Digital Camera接口、 MIPI Rx(含 MIPI 接口、 LVDS 接口和 HISPI 接口)接收视频数据。  
Vi还可以对接收到的原始视频图像数据进行裁剪(Crop)等处理,并实现一路原始视频图像输入,输出一路视频图像功能.

我们使用的是海思样例的SENSOR类型**PANASONIC\_MN34220\_SUBLVDS\_1080P\_30FPS**(传感器为松下的MN34220,采用SubLVDS的信号传输技术,使用1080P的分辨率,30帧率).

\_\_MIPI\_\_和\_\_LVDS\_\_的概念：  
**MIPI**：移动产业处理器接口（Mobile Industry Processor Interface 简称MIPI）是为移动应用处理器制定的开放标准和一个规范。  
**LVDS**：Low Voltage Differential Signaling，是一种低压差分信号技术接口。它是为克服以TTL电平方式传输宽带高码率数据时功耗大、EMI电磁干扰大等缺点而研制的一种数字视频信号传输方式,**SubLVDS**则是LVDS的发展.

### VI内部单元工作流程 ###

> 摄像机通过镜头(lens)聚焦光线,将光信号投射到 sensor 的感光区域,sensor经过光电转换，将 Bayer 格式的原始图像送给 ISP(Image Signal Processing 图像信号处理) 经过算法处理，输出 RGB 空间域的图像给后端的视频采集单元。在这个过程中，ISP 通过运行在其上的 firmware 对 lens 和 sensor 进行相应控制，进而完成自动光圈、自动曝光、自动白平衡等功能。其中，firmware 的运转靠视频采集单元的中断驱动。

**ISP控制结构**:

![Alt text][Alt text 1]

### VIU视频采集单元 ###

VIU视频采集单元负责接收ISP传过来的视频图像,经过视频输入设备Dev0的加工,通过物理通道Chn0发送给接收者,也可通过扩展通道,进行缩放后发送出去.

视频输入设备Dev0:  
Hi3516A/Hi3518EV200/Hi3519V100 芯片只有一个 VI 设备，即 Dev0。 Dev0 支持BT.656、 BT.601、 DC、 MIPI Rx（MIPI、 LVDS、 HISPI 接口）输入。 Dev0 不支持非连续 pixel clock 时序。

视频物理通道Chn0:  
Hi3516A/Hi3518EV200/Hi3519V100 VI 硬件单元仅包含 1 个 VI 视频物理通道，即Chn0。不存在次通道，但支持扩展通道。

视频扩展通道ext\_ChnN:  
扩展通道是物理通道的扩展，主要实现缩放功能，其数据来源于物理通道，Hi3516A/Hi3518EV200/Hi3519V100 最多支持 16 个扩展通道。

## 参阅Api实现VI ##

下面程序是初始化Vi后直接绑定Vi到Venc编码的例子，没有写清理工作，已测试可以运行，可供参考.

### main.c ###

#include <stdio.h>
    #include <unistd.h>
    #include <stdlib.h>
    #include <signal.h>
    #include <pthread.h>
    #include <string.h>
    #include <fcntl.h>
    
    #include "My_Head.h"
    
    static pthread_t gs_IspPid;
    static HI_S32 gs_s32SnapCnt = 0;
    
    HI_VOID WB_VENC_HandleSig(HI_S32 signo)
    {
        
    	if(SIGINT == signo || SIGTERM == signo)
    	{
        
    		LOG_D("Interrupt Happen! exit\n");
    	}
    	exit(HI_FAILURE);
    }
    
    HI_S32 WB_MPI_SYS_Init()
    {
        
    	LOG_D("******************************************\n");
        LOG_D("step 1: Mpi System Init\n");
     	LOG_D("******************************************\n");
    	HI_S32 s32Ret;
    	VB_CONF_S struVbConf;
    	MPP_SYS_CONF_S struSysConf = {
        0};
    
    	memset(&struVbConf, 0, sizeof(VB_CONF_S));
    	//memcpy(&struVbConf, &VB_SYS_CONF_BASE, sizeof(struVbConf));
    	struVbConf.u32MaxPoolCnt = 128;
    	struVbConf.astCommPool[0].u32BlkSize = 3159360;
    	struVbConf.astCommPool[0].u32BlkCnt = 12;
    
    	HI_MPI_SYS_Exit();
        HI_MPI_VB_Exit();
    
    	s32Ret = HI_MPI_VB_SetConf(&struVbConf);
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("SetConf failed!\n");
    		return s32Ret;
    	}
    
    	s32Ret = HI_MPI_VB_Init();
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("Vb Init failed!\n");
    		return s32Ret;
    	}
    
    	struSysConf.u32AlignWidth = 64;
    	/*set config of mpp system*/
    	s32Ret = HI_MPI_SYS_SetConf(&struSysConf);
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("Set mpp sys config failed!\n");
    		return s32Ret;
    	}
    
    	/*init system*/
    	s32Ret = HI_MPI_SYS_Init();
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("Mpi sys init failed!\n");	
    		return s32Ret;
    	}
    
    	LOG_D("******************************************\n");
        LOG_D("Mpi Sys Init Success\n");
     	LOG_D("******************************************\n");
    
    	return HI_SUCCESS;
    	/**/
    }
    
    HI_S32 WB_MIPI_Init()
    {
        
    	HI_S32 fd;
    	combo_dev_attr_t* pstcomboDevAttr = NULL;
    	fd = open("/dev/hi_mipi", O_RDWR);
    	if( fd < 0)
    	{
        
    		LOG_W("open hi_mipi dev failed\n");
    		return -1;
    	}
    
    	pstcomboDevAttr = &SUBLVDS_4lane_SENSOR_MN34220_12BIT_1080_NOWDR_ATTR;
    	
    	if (ioctl(fd, _IOW(HI_MIPI_IOC_MAGIC, 0x01, combo_dev_attr_t), pstcomboDevAttr))	
    	{
        
    		LOG_E("set mipi attr failed\n");
    		close(fd);
    		return HI_FAILURE;
    	}
    	close(fd);
    	return HI_SUCCESS;
    }
    
    HI_S32 WB_Mpp_Vi_Init(HI_VOID)
    {
        
    	LOG_D("******************************************\n");
        LOG_D("step 2: Init vi dev and chn to capture\n");
     	LOG_D("******************************************\n");
    	HI_S32 s32Ret;
    	VI_DEV ViDev = 0;
    	VI_CHN ViChn = 0;
    	VI_DEV_ATTR_S stViDevAttr;
    	VI_CHN_ATTR_S stChnAttr;
        ISP_WDR_MODE_S stWdrMode;
    
        memset(&stViDevAttr, 0, sizeof(stViDevAttr));
        memcpy(&stViDevAttr, &DEV_ATTR_LVDS_BASE, sizeof(stViDevAttr));
        stViDevAttr.stDevRect.s32X = 0;
        stViDevAttr.stDevRect.s32Y = 20;
        stViDevAttr.stDevRect.u32Width  = 1920;
        stViDevAttr.stDevRect.u32Height = 1080;
    /*
    	LOG_D("----%d\n",stViDevAttr.enIntfMode);
        LOG_D("----%d\n",stViDevAttr.enWorkMode);
        LOG_D("----%d\n",stViDevAttr.au32CompMask[0]);
        LOG_D("----%d\n",stViDevAttr.au32CompMask[1]);
        LOG_D("----%d\n",stViDevAttr.enScanMode);
        LOG_D("----%d\n",stViDevAttr.enDataSeq);
        LOG_D("----%d\n",stViDevAttr.enDataPath);
        LOG_D("----%d\n",stViDevAttr.enInputDataType);
        LOG_D("----%d\n",stViDevAttr.stDevRect.s32X);
        LOG_D("----%d\n",stViDevAttr.stDevRect.s32Y);
        LOG_D("----%d\n",stViDevAttr.stDevRect.u32Width);
        LOG_D("----%d\n",stViDevAttr.stDevRect.u32Height);
        LOG_D("----%d\n",stViDevAttr.bDataRev);
    */	
    	s32Ret = HI_MPI_VI_SetDevAttr(ViDev, &stViDevAttr);
    	if (s32Ret != HI_SUCCESS)
    	{
        
    	LOG_E("Set dev attributes failed with error code %#x!\n", s32Ret);
    	return HI_FAILURE;
    	}
    
        s32Ret = HI_MPI_ISP_GetWDRMode(0, &stWdrMode);
        if (s32Ret != HI_SUCCESS)
        {
        
            LOG_E("HI_MPI_ISP_GetWDRMode failed with %#x!\n", s32Ret);
            return HI_FAILURE;
        }
    
        if (stWdrMode.enWDRMode)  //wdr mode
        {
        
            VI_WDR_ATTR_S stWdrAttr;
    
            stWdrAttr.enWDRMode = stWdrMode.enWDRMode;
            stWdrAttr.bCompress = HI_FALSE;
    
            s32Ret = HI_MPI_VI_SetWDRAttr(0, &stWdrAttr);
            if (s32Ret)
            {
        
                LOG_E("HI_MPI_VI_SetWDRAttr failed with %#x!\n", s32Ret);
                return HI_FAILURE;
            }
        }
    
    	s32Ret = HI_MPI_VI_EnableDev(ViDev);
    	if (s32Ret != HI_SUCCESS)
    	{
        
    	LOG_E("Enable dev failed with error code %#x!\n", s32Ret);
    	return HI_FAILURE;
    	}
    
    	stChnAttr.stCapRect.s32X = 0;
    	stChnAttr.stCapRect.s32Y = 0;
    	stChnAttr.stCapRect.u32Width = 1920;
    	stChnAttr.stCapRect.u32Height = 1080;
    	stChnAttr.stDestSize.u32Width = 1920;
    	stChnAttr.stDestSize.u32Height = 1080;
    	stChnAttr.enCapSel = VI_CAPSEL_BOTH;
    	stChnAttr.enPixFormat = PIXEL_FORMAT_YUV_SEMIPLANAR_420;
    	stChnAttr.bMirror = HI_FALSE;
    	stChnAttr.bFlip = HI_FALSE;
    	stChnAttr.s32SrcFrameRate = -1;
    	stChnAttr.s32DstFrameRate = -1;
    	stChnAttr.enCompressMode = COMPRESS_MODE_NONE;
    
    /*
    	LOG_D("----%d\n",stChnAttr.stCapRect.s32X);
        LOG_D("----%d\n",stChnAttr.stCapRect.s32Y);
        LOG_D("----%d\n",stChnAttr.stCapRect.u32Width);
        LOG_D("----%d\n",stChnAttr.stCapRect.u32Height);
        LOG_D("----%d\n",stChnAttr.stDestSize.u32Width );
        LOG_D("----%d\n",stChnAttr.stDestSize.u32Height );
        LOG_D("----%d\n",stChnAttr.enCapSel);
        LOG_D("----%d\n",stChnAttr.enPixFormat);
        LOG_D("----%d\n",stChnAttr.bMirror);
        LOG_D("----%d\n",stChnAttr.bFlip);
        LOG_D("----%d\n",stChnAttr.s32SrcFrameRate);
        LOG_D("----%d\n",stChnAttr.s32DstFrameRate);
        LOG_D("----%d\n",stChnAttr. enCompressMode);
    */
    	s32Ret = HI_MPI_VI_SetChnAttr(ViChn,&stChnAttr);
    	if (s32Ret != HI_SUCCESS)
    	{
        
    	LOG_E("Set chn attributes failed with error code %#x!\n", s32Ret);
    	return HI_FAILURE;
    	}
    
    	s32Ret = HI_MPI_VI_EnableChn(ViChn);
    	if (s32Ret != HI_SUCCESS)
    	{
        
    	LOG_E("Enable chn failed with error code %#x!\n", s32Ret);
    	return HI_FAILURE;
    	}
    
    	LOG_D("******************************************\n");
        LOG_D("now, vi is capturing images\n");
     	LOG_D("******************************************\n");
    
     	return HI_SUCCESS;
     	/* now, vi is capturing images, you can do something else ... */
    	/*s32Ret = HI_MPI_VI_DisableChn(ViChn);
    	if (s32Ret != HI_SUCCESS)
    	{
    	LOG_D("Disable chn failed with error code %#x!\n", s32Ret);
    	return HI_FAILURE;
    	}
    	s32Ret = HI_MPI_VI_DisableDev(ViDev);
    	if (s32Ret != HI_SUCCESS)
    	{
    	LOG_D("Disable dev failed with error code %#x!\n", s32Ret);
    	return HI_FAILURE;
    	}*/
    
    }
    
    HI_S32 WB_MPI_VENC_Init()
    {
        
    
    	LOG_D("******************************************\n");
        LOG_D("step 3:  Create Venc Chn\n");
     	LOG_D("******************************************\n");
    
    	HI_S32 s32Ret;
    	VI_CHN ViChn = 0;
    	VENC_CHN VencChn = 0;
    	VENC_ATTR_JPEG_S stJpegAttr;	
    
    	VENC_CHN_ATTR_S stVencChnAttr;
    	MPP_CHN_S stSrcChn, stDestChn;
    
    	stVencChnAttr.stVeAttr.enType = PT_JPEG;
    	stJpegAttr.u32PicWidth = 1920;
    	stJpegAttr.u32PicHeight = 1080;
    	stJpegAttr.u32MaxPicWidth = 1920;
    	stJpegAttr.u32MaxPicHeight = 1080;
    	stJpegAttr.u32BufSize = 1920*1080*2;
    	stJpegAttr.bByFrame = HI_TRUE;
    	stJpegAttr.bSupportDCF = HI_FALSE;
    	memcpy(&stVencChnAttr.stVeAttr.stAttrJpeg, &stJpegAttr, sizeof(VENC_ATTR_JPEG_S));
    
    	s32Ret = HI_MPI_VENC_CreateChn(VencChn, &stVencChnAttr);
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("Hi Mpi Venc CreateChn Failed with %#x!\n", s32Ret);
    		return s32Ret;
    	}
    
    	LOG_D("******************************************\n");
        LOG_D("step 4:  Start Recv Venc Pictures\n");
     	LOG_D("******************************************\n");
    
     	//s32Ret = HI_MPI_VENC_StartRecvPic(VencChn);
     	//if(HI_SUCCESS != s32Ret)
     	//{
        
     	//	LOG_E("Hi Mpi Venc Start Recv Failed with %#x!\n", s32Ret);
    	//	return s32Ret;
     	//}
    
     	stSrcChn.enModId = HI_ID_VIU;
     	stSrcChn.s32DevId = 0;
     	stSrcChn.s32ChnId = ViChn;
    
     	stDestChn.enModId = HI_ID_VENC;
     	stDestChn.s32DevId = 0;
     	stDestChn.s32ChnId = 0;
    
     	s32Ret = HI_MPI_SYS_Bind(&stSrcChn, &stDestChn);
    
    	return HI_SUCCESS;
    }
    
    HI_S32 WB_VENC_SaveJpeg(FILE* pFile, VENC_STREAM_S* pstVencStream)
    {
        
    	VENC_PACK_S* pstData;
    	HI_U32 i;
    
    	for(i = 0; i < pstVencStream->u32PackCount; i++)
    	{
        
    		pstData = &pstVencStream->pstPack[i];
    		fwrite(pstData->pu8Addr + pstData->u32Offset, pstData->u32Len - pstData->u32Offset, 1, pFile);
    		fflush(pFile);
    	}
    
    	return HI_SUCCESS;
    }
    
    HI_S32 WB_Venc_SaveSnap(VENC_STREAM_S* pstVencStream)
    {
        
    	char acFile[FILE_NAME_LEN] = {
        0};
    	FILE* pFile;
    	HI_S32 s32Ret;
    
    	snprintf(acFile, FILE_NAME_LEN, "Mysnap.jpg" );
    	pFile = fopen(acFile, "wb");
    	if(pFile == NULL)
    	{
        
    		LOG_E("open file error");
    		return HI_FAILURE;
    	}
    	s32Ret = WB_VENC_SaveJpeg(pFile, pstVencStream);
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("save snap picture failed!\n");
    		return HI_FAILURE;
    	}
    	fclose(pFile);
    	gs_s32SnapCnt++;
    	return HI_SUCCESS;
    
    }
    
    HI_S32 WB_VENC_GetVencSnapProc(VENC_CHN VencChn)
    {
        
    	LOG_D("******************************************\n");
        LOG_D("step 5:  Get Venc Snap Start\n");
     	LOG_D("******************************************\n");
     	sleep(2);
    
    	HI_S32 s32Ret;
    	//HI_S32 s32Cnt = 0;
    	HI_S32 s32VencFd;
    	fd_set read_fds;
    	struct timeval timeout;
    	VENC_STREAM_S stVencStream;
    	VENC_CHN_STAT_S stVencChnStat;
    	VENC_RECV_PIC_PARAM_S stRecvParam;
    
    	//HI_CHAR aszFileName[VENC_MAX_CHN_NUM][64];
    	//char szFilePostfix[10];
    
        stRecvParam.s32RecvPicNum = 1;
        s32Ret = HI_MPI_VENC_StartRecvPicEx(VencChn, &stRecvParam);
        if(HI_SUCCESS != s32Ret)
        {
        
        	LOG_E("HI_MPI_VENC_StartRecvPic faild with%#x!\n", s32Ret);
        }
    
    	s32VencFd = HI_MPI_VENC_GetFd(VencChn);
    	if(s32VencFd < 0)
    	{
        
    		LOG_E("HI_MPI Venc GetFd failed with %#x!\n", s32VencFd);
    		return -1;
    	}
    
    	FD_ZERO(&read_fds);
    	FD_SET(s32VencFd, &read_fds);
    
    	timeout.tv_sec = 2;
    	timeout.tv_usec = 0;
    
    	LOG_D(" Venc GetFd is %d\n", s32VencFd);
    	s32Ret = select(s32VencFd +1, &read_fds, NULL, NULL, &timeout);
    	if(s32Ret < 0)
    	{
        
    		LOG_E("snap select failed!\n");
    	}
    	else if (s32Ret == 0)
    	{
        
    		LOG_E("Get Venc Stream time out !\n");
     		return s32Ret;
    	}
    	else
    	{
        	
    		if(FD_ISSET(s32VencFd, &read_fds))
    		{
        
    			s32Ret = HI_MPI_VENC_Query(VencChn, &stVencChnStat);
    			if(HI_SUCCESS != s32Ret)
    			{
        
    			LOG_E("Mpi Venc Query failed with %#x!\n", s32Ret);
    			return s32Ret;
    			}
    
    			if(0 == stVencChnStat.u32CurPacks)
    			{
        
    				LOG_E("NOTE: Current Frame is NULL!\n");
    				return HI_SUCCESS;
    			}
    
    			stVencStream.pstPack = (VENC_PACK_S* )malloc(sizeof(VENC_PACK_S) * stVencChnStat.u32CurPacks);
    			if(NULL == stVencStream.pstPack)
    			{
        
    				LOG_E("malloc memory failed!\n");
    				return s32Ret;
    			}
    
    			stVencStream.u32PackCount = stVencChnStat.u32CurPacks;
    			s32Ret = HI_MPI_VENC_GetStream(VencChn, &stVencStream, -1);
    			if(HI_SUCCESS != s32Ret)
    			{
        
    				LOG_E("Hi Mpi Venc GetStream failed with %#x!\n", s32Ret);
    				free(stVencStream.pstPack);
    				stVencStream.pstPack = NULL;
    				return s32Ret;
    			}
    
    			s32Ret = WB_Venc_SaveSnap(&stVencStream);
    			if(HI_SUCCESS != s32Ret)
    			{
        
    				LOG_E("Venc SaveSnap failed with %#x!\n", s32Ret);
    				free(stVencStream.pstPack);
    				stVencStream.pstPack = NULL;
    				return s32Ret;
    			}
    
    			s32Ret = HI_MPI_VENC_ReleaseStream(VencChn, &stVencStream);
    			if(s32Ret)
    			{
        
    				LOG_E("Release Stream failed with %#x!\n",s32Ret);
    				free(stVencStream.pstPack);
    				stVencStream.pstPack = NULL;
    				return s32Ret;
    			}
    			free(stVencStream.pstPack);
    			stVencStream.pstPack = NULL;
    		}
    	}
    
        s32Ret = HI_MPI_VENC_StopRecvPic(VencChn);
    
        if (s32Ret != HI_SUCCESS)
        {
        
            LOG_E("MPI VENC StopRecvPic failed with %#x!\n",  s32Ret);
            return s32Ret;
        }
    
    
        return HI_SUCCESS;
    }
    
    void* WB_Isp_Run_Proc(void* arg)
    {
        
    	ISP_DEV IspDev = 0;
    	HI_MPI_ISP_Run(IspDev);
    	return HI_NULL;
    }
    
    HI_S32 WB_VENC_ISP_Init()
    {
        
    	ISP_DEV IspDev = 0;
    	HI_S32 s32Ret;
    	ISP_PUB_ATTR_S stPubAttr;
    	ALG_LIB_S stLib;
    
    	s32Ret = sensor_set_inifile_path("configs/");
    	if(s32Ret != HI_SUCCESS)
    	{
        
    		LOG_E("set cmos iniparser file path failed with %#x!\n", s32Ret);
    		return s32Ret;
    	}
    
    	s32Ret = sensor_register_callback();
    	if(s32Ret != HI_SUCCESS)
    	{
        
    		LOG_E("sensor_register_callback failed with %#x!\n", s32Ret);
    		return s32Ret;
    	}
    
    	stLib.s32Id = 0;
    	strcpy(stLib.acLibName, HI_AE_LIB_NAME);
    	s32Ret = HI_MPI_AE_Register(IspDev, &stLib);
    	if(s32Ret != HI_SUCCESS)
    	{
        
    		LOG_E("HI_MPI_AE_Register failed!\n");
    		return s32Ret;
    	}
    
    	stLib.s32Id = 0;
    	strcpy(stLib.acLibName, HI_AWB_LIB_NAME);
    	s32Ret = HI_MPI_AWB_Register(IspDev, &stLib);
    	if(s32Ret != HI_SUCCESS)
    	{
        
    		LOG_E("HI_MPI_AWB Register failed!\n");
    		return s32Ret;
    	}
    
    	stLib.s32Id = 0;
        strcpy(stLib.acLibName, HI_AF_LIB_NAME);
        s32Ret = HI_MPI_AF_Register(IspDev, &stLib);
        if (s32Ret != HI_SUCCESS)
        {
        
    		LOG_E("HI_MPI_AF Register failed!\n");
            return s32Ret;
        }
    
    	s32Ret = HI_MPI_ISP_MemInit(IspDev);
    	if(s32Ret != HI_SUCCESS)
    	{
        
    		LOG_E("HI Mpi Isp Init failed!\n");
    		return s32Ret;
    	}
    
    	ISP_WDR_MODE_S stWdrMode;
    	stWdrMode.enWDRMode = WDR_MODE_NONE;
    	s32Ret = HI_MPI_ISP_SetWDRMode(0, &stWdrMode);
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("start ISP WDR failed!\n");
    		return s32Ret;
    	}
    
    	switch(SENSOR_TYPE)
    	{
        
    		case APTINA_9M034_DC_720P_30FPS:
    		LOG_E("Wrong Sensor Type\n");
    		break;
    
    		case PANASONIC_MN34220_SUBLVDS_1080P_30FPS:
    		stPubAttr.enBayer				= BAYER_GRBG;
    		stPubAttr.f32FrameRate			= 30;
    		stPubAttr.stWndRect.s32X		= 0;
    		stPubAttr.stWndRect.s32Y		= 0;
    		stPubAttr.stWndRect.u32Width	= 1920;
    		stPubAttr.stWndRect.u32Height 	= 1080;
    		break;
    	}
    
    	s32Ret = HI_MPI_ISP_SetPubAttr(IspDev, &stPubAttr);
    	if(s32Ret != HI_SUCCESS)
    	{
        
    		LOG_E("Mpi Isp SetPubAttr failed with %#x!\n", s32Ret);
    		return s32Ret;
    	}
    	s32Ret = HI_MPI_ISP_Init(IspDev);
    	if(s32Ret != HI_SUCCESS)
    	{
        
    		LOG_E("Mpi ISP Init failed!\n");
    	}
    
    	if( 0 != pthread_create(&gs_IspPid, 0, (void * (*)(void *))WB_Isp_Run_Proc, NULL))
    	{
        
    		LOG_E("Create Isp Run thread failed!\n");
    		return HI_FAILURE;
    	}
    
    	return HI_SUCCESS;
    
    }
    
    
    int main(int argc,char *argv[])
    {
        
    	HI_S32 s32Ret;
    
    	signal(SIGINT, WB_VENC_HandleSig);
    	signal(SIGTERM, WB_VENC_HandleSig);
    
    	s32Ret = WB_MPI_SYS_Init();
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("Mpi sys init failed!\n");
    		exit(-1);
    	}
    
    	LOG_D("******************************************\n");
        LOG_D("step 1~2:  WB_MIPI_Init start\n");
     	LOG_D("******************************************\n");
    	
    	s32Ret = WB_MIPI_Init();
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("MIPI init failed!\n");
    		exit(-1);
    	}
    
    	LOG_D("******************************************\n");
        LOG_D("step 1~2:  WB_ISP_Init start\n");
     	LOG_D("******************************************\n");
    	s32Ret = WB_VENC_ISP_Init();
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("ISP init failed!\n");
    		exit(-1);
    	}
    
    	s32Ret = WB_Mpp_Vi_Init();
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("Mpi vi init failed!\n");
    		exit(-1);
    	}
    
    	s32Ret = WB_MPI_VENC_Init();
    	if(HI_SUCCESS != s32Ret)
    	{
        
    		LOG_E("Mpi venc init failed!\n");
    		exit(-1);
    	}
    
     	s32Ret = WB_VENC_GetVencSnapProc(0);
     	if(s32Ret != HI_SUCCESS)
     	{
        
     		LOG_E("GetVencSnapProc is Failed!\n");
     		return HI_FAILURE;
     	}
    
    	getchar();
    
    	exit(s32Ret);
    }

### My\_Head.h ###

//#include <sys/time.h>
    
    #include "hi_comm_venc.h"
    #include "hi_type.h"
    #include "hi_comm_vi.h"
    #include "hi_comm_video.h"
    #include "hi_comm_vb.h"
    #include "hi_comm_sys.h"
    #include "hi_mipi.h"
    #include "hi_comm_3a.h"
    #include "hi_comm_isp.h"
    #include "hi_ae_comm.h"
    #include "hi_sns_ctrl.h"
    #include "hi_af_comm.h"
    #include "hi_awb_comm.h"
    
    #include "mpi_venc.h"
    #include "mpi_sys.h"
    #include "mpi_isp.h"
    #include "mpi_af.h"
    #include "mpi_vb.h"
    #include "mpi_vi.h"
    #include "mpi_ae.h"
    #include "mpi_awb.h"
    
    #include "sys/ioctl.h"
    
    #define FILE_NAME_LEN 128
    
    #define TRUE 1
    #define FALSE 0
    
    #define TAG "TEST"
    #define DEBUG TRUE
    
    /*
    #define TIMEPRINT \
    	do{\
    	struct timeval now;\
    	struct tm* ptime = NULL;\
    	suseconds_t mstime;\
    	\
    	gettimeofday(&now, NULL);\
    	ptime = gmtime(&now.tv_sec);\
    	mstime = now.tv_usec/10000;\
    	\
    	printf("%d-%d-%d-%d-%d-%d:%02d  ", 1900 + ptime->tm_year, 1 + ptime->tm_mon, ptime->tm_mday, ptime->tm_hour, ptime->tm_min, ptime->tm_sec, mstime);\
    	}while(0)
    */
    
    #define TIMEPRINT 
    
    #if DEBUG
    #define LOG_D(...) \
    		do{\
    			TIMEPRINT\
    			printf("D/%s ",TAG);\
    			printf("(%s, %d): ", __FILE__,__LINE__);\
    			printf(__VA_ARGS__);\
    		}while(0)
    #else
    #define LOG_D(...) printf(__VA_ARGS__)
    #endif
    
    #if DEBUG
    #define LOG_W(...) \
    		do{\
    			TIMEPRINT\
    			printf("W/%s ",TAG);\
    			printf("(%s, %d): ", __FILE__,__LINE__);\
    			printf(__VA_ARGS__);\
    		}while(0)
    #else
    #define LOG_W(...) printf(__VA_ARGS__)
    #endif
    
    #if DEBUG
    #define LOG_E(...) \
    		do{\
    			TIMEPRINT\
    			printf("E/%s ",TAG);\
    			printf("(%s, %d): ", __FILE__,__LINE__);\
    			printf(__VA_ARGS__);\
    		}while(0)
    #else
    #define LOG_E(...) printf(__VA_ARGS__)
    #endif
    
    #if DEBUG
    #define LOG_B(...) \
    		do{\
    			TIMEPRINT\
    			printf("B/%s ",TAG);\
    			printf("(%s, %d):", __FILE__,__LINE__);\
    			printf(__VA_ARGS__);\
    			getchar();\
    		}while(0)
    #else
    #define LOG_B(...)  \
    		do{\
    			printf("Break Here!\n");\
    			printf(__VA_ARGS__);\
    			getchar();\
    		}while(0)
    #endif
    
    typedef enum wb_vi_mode_e
    {
        
        APTINA_AR0130_DC_720P_30FPS = 0,
        APTINA_9M034_DC_720P_30FPS,
        SAMPLE_VI_MODE_1_D1,
        SAMPLE_VI_MODE_BT1120_1080I,
        SAMPLE_VI_MODE_BT1120_720P,
        SAMPLE_VI_MODE_BT1120_1080P,
        PANASONIC_MN34220_SUBLVDS_1080P_30FPS,
        PANASONIC_MN34220_SUBLVDS_720P_120FPS,
        SONY_IMX178_LVDS_1080P_30FPS,
        SONY_IMX185_MIPI_1080P_30FPS,
        PANASONIC_MN34220_MIPI_1080P_30FPS,
        PANASONIC_MN34220_MIPI_720P_120FPS,
        SONY_IMX178_LVDS_5M_30FPS,
        SONY_IMX117_LVDS_1080P_30FPS,
        SONY_IMX117_LVDS_720P_30FPS,
        SONY_IMX123_LVDS_QXGA_30FPS,
        APTINA_AR0230_HISPI_1080P_30FPS,
        APTINA_AR0237_HISPI_1080P_30FPS,
        APTINA_AR0330_MIPI_1080P_30FPS,
        APTINA_AR0330_MIPI_1536P_25FPS,
        APTINA_AR0330_MIPI_1296P_25FPS,
        OMNIVISION_OV4689_MIPI_4M_30FPS,
        OMNIVISION_OV4689_MIPI_1080P_30FPS,
        OMNIVISION_OV5658_MIPI_5M_30FPS,
    }Vi_Mode_E;
    
    typedef struct VENC_GETSTREAMPARA_S
    {
        
    	HI_BOOL bTreadStart;
    	HI_S32 s32Cnt;
    }Venc_GetStreamPara_S;
    
    VI_DEV_ATTR_S DEV_ATTR_LVDS_BASE =
    {
        
        /* interface mode */
        VI_MODE_LVDS,
        /* multiplex mode */
        VI_WORK_MODE_1Multiplex,
        /* r_mask    g_mask    b_mask*/
        {
        0xFFF00000,    0x0},
        /* progessive or interleaving */
        VI_SCAN_PROGRESSIVE,
        /*AdChnId*/
        {
         -1, -1, -1, -1},
        /*enDataSeq, only support yuv*/
        VI_INPUT_DATA_YUYV,
    
        /* synchronization information */
        {
        
            /*port_vsync   port_vsync_neg     port_hsync        port_hsync_neg        */
            VI_VSYNC_PULSE, VI_VSYNC_NEG_LOW, VI_HSYNC_VALID_SINGNAL, VI_HSYNC_NEG_HIGH, VI_VSYNC_VALID_SINGAL, VI_VSYNC_VALID_NEG_HIGH,
    
            /*hsync_hfb    hsync_act    hsync_hhb*/
            {
        
                0,            1280,        0,
                /*vsync0_vhb vsync0_act vsync0_hhb*/
                0,            720,        0,
                /*vsync1_vhb vsync1_act vsync1_hhb*/
                0,            0,            0
            }
        },
        /* use interior ISP */
        VI_PATH_ISP,
        /* input data type */
        VI_DATA_TYPE_RGB,
        /* bRever */
        HI_FALSE,
        /* DEV CROP */
        {
        0, 0, 1920, 1080}
    };
    
    //VB_CONF_S VB_SYS_CONF_BASE =
    //{
        
    	/*Max Pool count*/
    //	128,
    	/*Vb Pool Stru*/
    //	{
        
    		/*BlkSize*/ 
    //		3159360,
    		/* BlkCnt  */
    //		20
    		/*acMmzName*/
    //	}
    //};
    
    combo_dev_attr_t MIPI_4lane_SENSOR_MN34220_MIPI_12BIT_ATTR =
    {
        
        .input_mode = INPUT_MODE_MIPI,
        {
        
            .mipi_attr =
            {
        
                RAW_DATA_12BIT,
                {
        0, 1, 2, 3, -1, -1, -1, -1}
            }
        }
    
    };
    
    combo_dev_attr_t SUBLVDS_4lane_SENSOR_MN34220_12BIT_1080_NOWDR_ATTR =
    {
        
        /* input mode */
        .input_mode = INPUT_MODE_SUBLVDS,
    
        {
        
            .lvds_attr = {
        
                .img_size = {
        1920, 1080},
                HI_WDR_MODE_NONE,
                LVDS_SYNC_MODE_SOL,
                RAW_DATA_12BIT,
                LVDS_ENDIAN_BIG,
                LVDS_ENDIAN_BIG,
                .lane_id = {
        0, 2, -1, -1, 1, 3, -1, -1},
                .sync_code =  {
        
                    {
           {
        0x002, 0x003, 0x000, 0x001}, //PHY0_lane0
                        {
        0x202, 0x203, 0x200, 0x201},
                        {
        0x102, 0x103, 0x100, 0x101},
                        {
        0x302, 0x303, 0x300, 0x301}
                    },
    
                    {
           {
        0x006, 0x007, 0x004, 0x005}, //PHY0_lane1
                        {
        0x206, 0x207, 0x204, 0x205},
                        {
        0x106, 0x107, 0x104, 0x105},
                        {
        0x306, 0x307, 0x304, 0x305}
                    },
    
                    {
           {
        0x00a, 0x00b, 0x008, 0x009}, //PHY0_lane2
                        {
        0x20a, 0x20b, 0x208, 0x209},
                        {
        0x10a, 0x10b, 0x108, 0x109},
                        {
        0x30a, 0x30b, 0x308, 0x309}
                    },
    
                    {
           {
        0x00a, 0x00b, 0x008, 0x009}, //PHY0_lane3  INPUT_MODE_LVDS
                        {
        0x20a, 0x20b, 0x208, 0x209},
                        {
        0x10a, 0x10b, 0x108, 0x109},
                        {
        0x30a, 0x30b, 0x308, 0x309}
                    },
    
                    {
           {
        0x012, 0x013, 0x010, 0x011},//PHY1_lane0
                        {
        0x212, 0x213, 0x210, 0x211},
                        {
        0x112, 0x113, 0x110, 0x111},
                        {
        0x312, 0x313, 0x310, 0x311}
                    },
    
                    {
           {
        0x016, 0x017, 0x014, 0x015}, //PHY1_lane1
                        {
        0x216, 0x217, 0x214, 0x215},
                        {
        0x116, 0x117, 0x114, 0x115},
                        {
        0x316, 0x317, 0x314, 0x315}
                    },
    
                    {
           {
        0x01a, 0x01b, 0x018, 0x019}, //PHY1_lane2
                        {
        0x21a, 0x21b, 0x218, 0x219},
                        {
        0x11a, 0x11b, 0x118, 0x119},
                        {
        0x31a, 0x31b, 0x318, 0x319}
                    },
    
                    {
           {
        0x01a, 0x01b, 0x018, 0x019}, //PHY1_lane3
                        {
        0x21a, 0x21b, 0x218, 0x219},
                        {
        0x11a, 0x11b, 0x118, 0x119},
                        {
        0x31a, 0x31b, 0x318, 0x319}
                    }
                }
            }
        }
    };

### Makefile ###

#
    #
    #
    #
    SRC := $(wildcard *.c)
    OBJ := $(SRC:%.c=%.o)
    TARGET := sample
    #CC :=gcc
    CC := arm-hisiv300-linux-gcc
    
    CFLAGS := -g -Wall -ldl -DSENSOR_TYPE=PANASONIC_MN34220_SUBLVDS_1080P_30FPS
    CFLAGS += -I../include/
    CFLAGS += -Dhi3516a -DHICHIP=0x3516A100 -DISP_V2 -DHI_MIPI_ENABLE -DHI_ACODEC_TYPE_INNER -mcpu=cortex-a7 -mfloat-abi=softfp -mfpu=neon-vfpv4 -ffunction-sections -mno-unaligned-access -fno-aggressive-loop-optimizations
    
    MPILIB := ../lib/libmpi.a
    ISPLIB := ../lib/libisp.a ../lib/lib_hiae.a
    SENSORLIB := ../lib/libsns_mn34220.a 
    AUDIO_LIBS :=../lib/libupvqe.a ../lib/libdnvqe.a ../lib/libVoiceEngine.a
    OTHERLIB := ../lib/lib_hiawb.a ../lib/lib_hidefog.a ../lib/lib_hiaf.a
    
    all: $(OBJ) $(TARGET)
    $(TARGET):
    	@echo "SRC is " $(SRC)
    	@echo "OBJ is " $(OBJ)
    	@echo "TARGET is " $(TARGET)
    	$(CC) $(CFLAGS) $(OBJ) -lpthread -lm -o $(TARGET) $(ISPLIB) $(MPILIB) $(SENSORLIB) $(OTHERLIB) $(AUDIO_LIBS)
    
    .PHONY: clean target
    clean:
    	rm -rf $(OBJ) $(TARGET)
    
    target:
    #@source /etc/profile
    	rm -rf $(OBJ) $(TARGET)
    	make

测试: ./sample  
![这里写图片描述][70]

## 通过其他设置接口增加功能 ##

我们已经实现了最简化的VI视频采集了，接着可以在此基础上通过其他设置接口进行更复杂功能的设计如HI\_MPI\_VI\_SetExtChnCrop()进行裁剪、HI\_MPI\_VI\_SetLDCAttr()设置 VI 镜头畸变校正（LDC）属性、HI\_MPI\_VI\_SetCSCAttr()调节图像的亮度、色调、对比度、饱和度等等。

至此本文关于海思VI模块的学习就结束了，学习中会遇到很多音视频方面的东西，像隔行扫描制式，YUV颜色图像编码方法等等，这些还没有做详细的解释，如果有机会再追加写一篇关于这些音视频方面的知识。

[Alt text]: /images/20220527/4233f4b6f02a4ad3bfdd8353874cfdec.png
[Alt text 1]: /images/20220527/157fc9b7421245e38470e56db49f57e2.png
[70]: /images/20220527/9360d05c659f4773a12d1e2dd896fb89.png