8127中的CaptureDisplay Demo

我用的软件版本是IPNC RDK 3.0。关于其中的CaptureDisplay这个usecase有些疑问。部分代码如下：

Void MultiCh_createVcapVdis()
{
    CaptureLink_CreateParams    capturePrm;
    NsfLink_CreateParams        nsfPrm;
    DeiLink_CreateParams        deiPrm[2];
    NullSrcLink_CreateParams    nullSrcPrm;
    MergeLink_CreateParams      mergePrm;
    DupLink_CreateParams        dupPrm;
    static SwMsLink_CreateParams       swMsPrm[VDIS_DEV_MAX];
    DisplayLink_CreateParams    displayPrm[VDIS_DEV_MAX];

    CaptureLink_VipInstParams *pCaptureInstPrm;
    CaptureLink_OutParams     *pCaptureOutPrm;

    VCAP_VIDDEC_PARAMS_S vidDecVideoModeArgs[NUM_CAPTURE_DEVICES];

    UInt32 grpxId[VDIS_DEV_MAX];
    UInt32 nullId;
    UInt32 mergeId, dupId;
    UInt32 deiOutQue;

    UInt32 vipInstId;
    UInt32 i;
    UInt32 numSubChains;
    Bool enableSdtv;

    for (i = 0; i < VDIS_DEV_MAX; i++)
    {
        MULTICH_INIT_STRUCT(DisplayLink_CreateParams,displayPrm[i]);
        MULTICH_INIT_STRUCT(SwMsLink_CreateParams ,swMsPrm[i]);
    }

    System_init();

    MultiCh_detectBoard();

    System_linkControl(
        SYSTEM_LINK_ID_M3VPSS,
        SYSTEM_M3VPSS_CMD_RESET_VIDEO_DEVICES,
        NULL,
        0,
        TRUE
        );

    gVcapModuleContext.captureId    = SYSTEM_LINK_ID_CAPTURE;
    gVcapModuleContext.nsfId[0]     = SYSTEM_LINK_ID_NSF_0;
    gVcapModuleContext.deiId[0]     = SYSTEM_LINK_ID_DEI_HQ_0;
    gVcapModuleContext.deiId[1]     = SYSTEM_LINK_ID_DEI_0;
    gVcapModuleContext.nullSrcId    = SYSTEM_VPSS_LINK_ID_NULL_SRC_0;
    mergeId                         = SYSTEM_VPSS_LINK_ID_MERGE_0;
    dupId                           = SYSTEM_VPSS_LINK_ID_DUP_0;

    gVdisModuleContext.swMsId[0]      = SYSTEM_LINK_ID_SW_MS_MULTI_INST_0;
    gVdisModuleContext.swMsId[1]      = SYSTEM_LINK_ID_SW_MS_MULTI_INST_1;

    swMsPrm[0].numSwMsInst   = 1;
    swMsPrm[1].numSwMsInst   = 1;
    swMsPrm[0].swMsInstId[0] = SYSTEM_SW_MS_SC_INST_SC5;
    swMsPrm[1].swMsInstId[0] = SYSTEM_SW_MS_SC_INST_SC5;

    gVdisModuleContext.displayId[0] = SYSTEM_LINK_ID_DISPLAY_0; // ON CHIP HDMI
    gVdisModuleContext.displayId[1] = SYSTEM_LINK_ID_DISPLAY_1; // OFF CHIP HDMI
    gVdisModuleContext.displayId[2] = SYSTEM_LINK_ID_DISPLAY_2; // OFF CHIP HDMI
    grpxId[0]                       = SYSTEM_LINK_ID_GRPX_0;
    grpxId[1]                       = SYSTEM_LINK_ID_GRPX_1;
#if 0    /* Enabling graphics only for ON CHIP HDMI an OFF CHIP HDMI*/
    grpxId[2]                       = SYSTEM_LINK_ID_GRPX_2;
#endif
    nullId                          = SYSTEM_VPSS_LINK_ID_NULL_0;

    numSubChains             = 2;
    deiOutQue                = DEI_LINK_OUT_QUE_VIP_SC;
    enableSdtv               = FALSE;

    CaptureLink_CreateParams_Init(&capturePrm);

    capturePrm.numVipInst    = 2 * numSubChains;
    capturePrm.outQueParams[0].nextLink = gVcapModuleContext.nsfId[0];

    capturePrm.tilerEnable              = FALSE;
    capturePrm.enableSdCrop             = FALSE;

    for(vipInstId=0; vipInstId<capturePrm.numVipInst; vipInstId++)
    {
        pCaptureInstPrm                     = &capturePrm.vipInst[vipInstId];
        pCaptureInstPrm->vipInstId          = (SYSTEM_CAPTURE_INST_VIP0_PORTA+vipInstId)%SYSTEM_CAPTURE_INST_MAX;
        pCaptureInstPrm->videoDecoderId     = SYSTEM_DEVICE_VID_DEC_TVP5158_DRV;
        pCaptureInstPrm->inDataFormat       = SYSTEM_DF_YUV422P;
        pCaptureInstPrm->standard           = SYSTEM_STD_MUX_4CH_D1;
        pCaptureInstPrm->numOutput          = 1;

        pCaptureOutPrm                      = &pCaptureInstPrm->outParams[0];
        pCaptureOutPrm->dataFormat          = SYSTEM_DF_YUV422I_YUYV;
        pCaptureOutPrm->scEnable            = FALSE;
        pCaptureOutPrm->scOutWidth          = 0;
        pCaptureOutPrm->scOutHeight         = 0;
        pCaptureOutPrm->outQueId            = 0;
    }

    for(i = 0; i < NUM_CAPTURE_DEVICES; i++)
    {
        vidDecVideoModeArgs[i].videoIfMode        = DEVICE_CAPT_VIDEO_IF_MODE_8BIT;
        vidDecVideoModeArgs[i].videoDataFormat    = SYSTEM_DF_YUV422P;
        vidDecVideoModeArgs[i].standard           = SYSTEM_STD_MUX_4CH_D1;
        vidDecVideoModeArgs[i].videoCaptureMode   =
                    DEVICE_CAPT_VIDEO_CAPTURE_MODE_MULTI_CH_PIXEL_MUX_EMBEDDED_SYNC;
        vidDecVideoModeArgs[i].videoSystem        =
                                      DEVICE_VIDEO_DECODER_VIDEO_SYSTEM_AUTO_DETECT;
        vidDecVideoModeArgs[i].videoCropEnable    = FALSE;
        vidDecVideoModeArgs[i].videoAutoDetectTimeout = -1;
    }

    Vcap_configVideoDecoder(vidDecVideoModeArgs, NUM_CAPTURE_DEVICES);
……
}

1、我的理解是IPNC 8127中应该不需要TVP7002这些解码芯片了吧，如果是这样，那代码中相关的解码器配置有什么作用呢？

2、对于capture link有如下配置：

capturePrm.numVipInst    = 2 * numSubChains;   //   =4

这是不是说明配置了4个vip？

另外，

pCaptureInstPrm->standard           = SYSTEM_STD_MUX_4CH_D1;

这是不是说明每一个vip都可以接入4路D1？如果是这样，那摄像机镜头采集得到的数据是接入到哪里的？