【已解决】Hi3516A vpss低延时属性使能

本帖最后由 yang1372073 于 2017-2-17 11:03 编辑

求助一下各位坛友，请问HI_MPI_VPSS_SetLowDelayAttr（）的低延时属性如何才能设置正确？
        VpssGrp = 0;
       
    stVpssGrpAttr.u32MaxW = stSize.u32Width;
    stVpssGrpAttr.u32MaxH = stSize.u32Height;
    stVpssGrpAttr.bIeEn = HI_FALSE;
    stVpssGrpAttr.bNrEn = HI_TRUE;
    stVpssGrpAttr.bHistEn = HI_FALSE;
    stVpssGrpAttr.bDciEn = HI_FALSE;
    stVpssGrpAttr.enDieMode = VPSS_DIE_MODE_NODIE;
    stVpssGrpAttr.enPixFmt = SAMPLE_PIXEL_FORMAT;
    s32Ret = SAMPLE_COMM_VPSS_StartGroup(VpssGrp, &stVpssGrpAttr);
    if (HI_SUCCESS != s32Ret)
    {
        dpf("SAMPLE_COMM_VPSS_StartGroup failed!\n");
                return s32Ret;
    }
       
    s32Ret = SAMPLE_COMM_VI_BindVpss(stViConfig.enViMode);
    if (HI_SUCCESS != s32Ret)
    {
        SAMPLE_PRT("Vi bind Vpss failed!\n");
                return s32Ret;
    }

        VpssChn = 0;

        stVpssChnMode.enChnMode      = VPSS_CHN_MODE_USER;
    stVpssChnMode.bDouble        = HI_FALSE;
    stVpssChnMode.enPixelFormat  = SAMPLE_PIXEL_FORMAT;
    stVpssChnMode.u32Width       = stSize.u32Width;
    stVpssChnMode.u32Height      = stSize.u32Height;
    stVpssChnMode.enCompressMode = COMPRESS_MODE_SEG;
    memset(&stVpssChnAttr, 0, sizeof(stVpssChnAttr));
    stVpssChnAttr.s32SrcFrameRate = -1;
    stVpssChnAttr.s32DstFrameRate = -1;
    s32Ret = SAMPLE_COMM_VPSS_EnableChn(VpssGrp, VpssChn, &stVpssChnAttr, &stVpssChnMode, NULL);
    if (HI_SUCCESS != s32Ret)
    {
        dpf("Enable vpss chn failed!\n");
                return s32Ret;
    }
  //按要求，我已经放在了group和chanmode后边，但还是不对
    VPSS_LOW_DELAY_INFO_S *pstLowDelayInfo = NULL;
    pstLowDelayInfo->bEnable = true;
    pstLowDelayInfo->u32LineCnt = 128;
    HI_MPI_VPSS_SetLowDelayAttr(VpssGrp, VpssChn, pstLowDelayInfo);