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How to get decoded H264 video resolution?

CJ
Intellectual 430 points

Hello, 

I'm working on vdec_vdis use case on DM8168, DVR_RDK_3.0. I'd like to get the resolution (width/height) of H264 video. However, I try to get it via VDEC and VDIS (swMs), but fail. Is there any way to get the correct value?

// Try VDIS function:

WINDOW_S chnlInfo ;

UInt32 WinId = 0 ;

Vdis_getChnlInfoFromWinId( 0, winId, &chnlInfo );

// Try VDEC function:

VIDEO_CHANNEL_LIST_INFO_S channelListInfo ;

Vdec_getChannelInfo( &channelListInfo );

As above code snap, both them return 1920*1080, but the real resolution is 1280*720...

[m3vpss ] *** [SWMS0] Mosaic Parameters *** 

[m3vpss ]
[m3vpss ] Output FPS: 28
[m3vpss ]
[m3vpss ] Win | Ch | Input | Input | Input | Input | Output | Output | Output | Output | Low Cost | SWMS | Data | Blank |
[m3vpss ] Num | Num | Start X, Y | Width x Height | Pitch Y / C | Memory Type | Start X, Y | Width x Height | Pitch Y / C | Memory Type | ON / OFF | Inst | Format| Frame |
[m3vpss ] ----------------------------------------------------------------------------------------------------------------------------------------------------------------------
[m3vpss ] 0 | 0 | 0, 0 | 1280 x 720 | 2048 / 2048 | NON-TILED | 780, 270 | 360 x 540 | 3840 / 0 | NON-TILED | OFF | 0 | 420SP | OFF |

  • 0
    TI__Guru 59700 points

    There is a bug in Vdis_getChnlInfoFromWinId which is fixed in RDK 4.0.

    Fix is to modify as below

    /dvr_rdk/mcfw/src_bios6/links_m3vpss/swMs/swMsLink_drv.c


    Int32 SwMsLink_drvGetInputChInfoFromWinId(SwMsLink_Obj * pObj,SwMsLink_WinInfo * pCropInfo)
    {
        UInt32  chnl;
        SwMsLink_drvLock(pObj);
        chnl = pObj->layoutParams.winInfo[pCropInfo->winId].channelNum;
        pCropInfo->startX   = pObj->rtChannelInfo[chnl].startX;
        pCropInfo->startY   = pObj->rtChannelInfo[chnl].startY;
        pCropInfo->width    = pObj->rtChannelInfo[chnl].width;
        pCropInfo->height   = pObj->rtChannelInfo[chnl].height;
        if ((FVID2_SF_PROGRESSIVE == pObj->rtChannelInfo[chnl].scanFormat) &&
            pObj->layoutParams.winInfo[pCropInfo->winId].bypass &&
            VPS_VPDMA_MT_NONTILEDMEM == pObj->rtChannelInfo[chnl].memType
            )
        {
            pCropInfo->height   /= 2;
        }
        SwMsLink_drvUnlock(pObj);
        return FVID2_SOK;
    }