in buffer and out buffer in OSD alg

SWOSD doesnt have an output buffer . It blends the graphics plane on the input buffer.

For access to input buffer refer

/dvr_rdk/mcfw/src_bios6/links_c6xdsp/alg_link/swosd/osdLink_alg.c

Int32 AlgLink_OsdalgProcessFrame(AlgLink_OsdObj * pObj, FVID2_Frame *pFrame)

Here FVID2_Frame *pFrame is an input frame sturcture. The input frame buffer can be accessed as

pFrame->addr[0][0] -- /* YUV422i or YUV420SP - Y-plane processing */

pFrame->addr[0][1] -- /* YUV420SP - C -plane processing */

thank you very much ! as we know that YUV422 format in memory is Y0U0Y1V0 Y2U1Y3V1

   the first pixel YUV     ：Y0 U0 V0

   the second pixel YUV   ： Y1 U0 V0

   the third  pixel YUV   ： Y2 U1 V1

so now i want change the value of pixel as 0 in AlgLink_OsdalgProcessFrame(AlgLink_OsdObj * pObj, FVID2_Frame *pFrame)

i do like this :

set the first and second pixel to be 0      *((Uint 32 *)pFrame->addr[0][0])=0x00000000;

set the second and third pixel to be 0    *((Uint 32 *)pFrame->addr[0][1)=0x00000000;

is that right ？？

oh ，you are so nice ! that is great ! thank you very much !  shall i ask you another question ?

my data stream is

steps :   capture--->ipcframesoutvpss------(processlink)---->ipcframesinDsp----->osd

                                   ipcframesoutvpss------(nextlink)---------->display

if i change all pixel value to be 0 in OSD like you have told above, it will change the display? that is to say the data in pFrame (in buffer ) of osd  will all be put to display because of processlink and nextlink, is that right ? or the display data will be same with the captrue data , even we changed OSD , there will no change on display ?

thanks

thank you very much !  ^_^

Hi Badri,

    I want to process the data after DMA moved the data to L2 memory.

    But I confused about which address I should set the DMA moved to?

    Could you give me some advices?

    shall we discuss at this:http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/t/254397.aspx

Thanks !

Best Regards !

1. hi Badri Narayanan,

i have done as you said , all the pixel are set as 0 , but the screen  also displayes what the camera captrues . why ?? 

i changed OSD alg in AlgLink_OsdalgProcessFrame() , as follow

    for(winId=0; winId<pChObj->numWindows; winId++)
    {
        if(!pChObj->osdWinObj[winId].enableWin)
            continue;
        Vps_printf("$$$$$$$$$$$$$$$$$$$$$  enableWin  $$$$$$$$$$$$$$$$$$$$$\n");
        /* YUV422i or YUV420SP - Y-plane processing */

        int i=0,j=0;
        UInt8 *pBufferStart = pFrame->addr[0][0];

        UInt8 *pBuffer;

         for (i= 0; i < pFrameInfo->rtChInfo.height;i++)

         pBuffer =pBufferStart + (i * pFrameInfo->rtChInfo.width);    

                 for (j = 0; j< pFrameInfo->rtChInfo.width/2; j++)  

                   {     

                          *(pBuffer + 0)=0;     

                          *(pBuffer + 1)=0;     

                          *(pBuffer + 2)=0;     

                          *(pBuffer + 3)=0;     

                           pBuffer  += 4;  

                   }

                  pSwOsdObj->videoWindowAddr = pFrame->addr[0][0];

................

}

my application code is

/*******************************************************************************
 *                                                                             *
 * Copyright (c) 2009 Texas Instruments Incorporated - http://www.ti.com/      *
 *                        ALL RIGHTS RESERVED                                  *
 *                                                                             *
 ******************************************************************************/

 
#include <demos/link_api_demos/common/chains.h>
#include <mcfw/interfaces/ti_venc.h>
#include <demos/link_api_demos/common/chains_ipcFrames.h> 

static SystemVideo_Ivahd2ChMap_Tbl systemVid_encDecIvaChMapTbl =
{
    .isPopulated = 1,
    .ivaMap[0] =
    {
        .EncNumCh  = 1,
        .EncChList = {0},
        .DecNumCh  = 0,
        .DecChList = {0},
    },
    .ivaMap[1] =
    {
        .EncNumCh  = 0,
        .EncChList = {0},
        .DecNumCh  = 1,
        .DecChList = {0},
    },
    .ivaMap[2] =
    {
        .EncNumCh  = 1,
        .EncChList = {1},
        .DecNumCh  = 1,
        .DecChList = {1},
    },
};

 
  Void Chains_doubleChCapNsfEncDecSwMsDis(Chains_Ctrl *chainsCfg)
  {
   CaptureLink_CreateParams  capturePrm;
   CaptureLink_VipInstParams  *pCaptureInstPrm;
   CaptureLink_OutParams   *pCaptureOutPrm;
  printf("@@@@@@@@@@@@@@@@@@@@@@@ hehe @@@@@@@@@@@@@@@@@@@@@@@\n");
   /* changed by chen longhu */
 
   IpcFramesInLinkRTOS_CreateParams  ipcFramesInDspPrm;
   IpcFramesOutLinkRTOS_CreateParams ipcFramesOutVpssPrm;
 
   AlgLink_CreateParams      dspAlgPrm;
 
   DisplayLink_CreateParams  displayPrm[CHAINS_SW_MS_MAX_DISPLAYS];
   UInt32 captureId, vipInstId;
   UInt32 ipcFramesOutVpssId,ipcFramesInDspId;
   UInt32 ipcBitsOutDspId,ipcBitsInHostId;
   UInt32 dspAlgId;
   UInt32 displayId[CHAINS_SW_MS_MAX_DISPLAYS];
 
   UInt32 i;
   char ch;
 
   CHAINS_INIT_STRUCT(CaptureLink_CreateParams,capturePrm);
   CHAINS_INIT_STRUCT(IpcFramesOutLinkRTOS_CreateParams,ipcFramesOutVpssPrm);
   CHAINS_INIT_STRUCT(IpcFramesInLinkRTOS_CreateParams,ipcFramesInDspPrm);

   CHAINS_INIT_STRUCT(AlgLink_CreateParams ,dspAlgPrm);
   for (i=0; i<CHAINS_SW_MS_MAX_DISPLAYS; i++) {
    CHAINS_INIT_STRUCT(DisplayLink_CreateParams,displayPrm[i]);
   }
   captureId    = SYSTEM_LINK_ID_CAPTURE;
   ipcFramesOutVpssId  = SYSTEM_VPSS_LINK_ID_IPC_FRAMES_OUT_0;
   ipcFramesInDspId= SYSTEM_DSP_LINK_ID_IPC_FRAMES_IN_0;
 
   dspAlgId= SYSTEM_LINK_ID_ALG_0;
   displayId[0]  = SYSTEM_LINK_ID_DISPLAY_0;
   displayId[1]  = SYSTEM_LINK_ID_DISPLAY_1;
 
   capturePrm.numVipInst     = 2;
   capturePrm.tilerEnable     = FALSE;
   capturePrm.numBufsPerCh    = 16;
   capturePrm.numExtraBufs    = 0;
   capturePrm.maxBlindAreasPerCh   = 0;
   capturePrm.isPalMode     = FALSE;
   capturePrm.enableSdCrop    = FALSE;
   capturePrm.doCropInCapture    = FALSE;
 
   for(i=0; i<capturePrm.numVipInst; i++)
   {
    vipInstId = SYSTEM_CAPTURE_INST_VIP0_PORTA + 2*i;
    pCaptureInstPrm      = &capturePrm.vipInst[i];
    pCaptureInstPrm->vipInstId    = vipInstId%SYSTEM_CAPTURE_INST_MAX;
    pCaptureInstPrm->videoDecoderId  = SYSTEM_DEVICE_VID_DEC_SII9233A_DRV;
    pCaptureInstPrm->inDataFormat   = SYSTEM_DF_YUV422P;
    pCaptureInstPrm->standard    = chainsCfg->displayRes[i];
    pCaptureInstPrm->numOutput    = 1;
    pCaptureInstPrm->numChPerOutput  = 1;
    pCaptureInstPrm->frameCaptureMode  = FALSE;
    pCaptureInstPrm->fieldsMerged   = FALSE;
    pCaptureOutPrm       = &pCaptureInstPrm->outParams[0];
    pCaptureOutPrm->dataFormat    = SYSTEM_DF_YUV422I_YUYV;
    pCaptureOutPrm->scEnable    = FALSE;
    pCaptureOutPrm->scOutWidth    = chainsCfg->channelConf[i].width;
    pCaptureOutPrm->scOutHeight   = chainsCfg->channelConf[i].height;
    pCaptureOutPrm->outQueId    = 0;
   }
 
   capturePrm.outQueParams[0].nextLink  = ipcFramesOutVpssId;
   System_linkCreate(captureId, &capturePrm, sizeof(capturePrm));
   for (i=0; i<gChains_ctrl.channelNum; i++) {
    chainsCfg->displayRes[i] = capturePrm.vipInst[i].standard;
    Vsys_getResSize(chainsCfg->displayRes[i], &chainsCfg->channelConf[i].width, &chainsCfg->channelConf[i].height);
    Vsys_getResRate(chainsCfg->displayRes[i], &chainsCfg->channelConf[i].frameRate);
 
   }
 
  
   ipcFramesOutVpssPrm.baseCreateParams.inQueParams.prevLinkId = captureId;
   ipcFramesOutVpssPrm.baseCreateParams.inQueParams.prevLinkQueId = 0;
   ipcFramesOutVpssPrm.baseCreateParams.outQueParams[0].nextLink = displayId[0];
   ipcFramesOutVpssPrm.baseCreateParams.numOutQue = 1;
   ipcFramesOutVpssPrm.baseCreateParams.processLink = ipcFramesInDspId;
 
   ipcFramesOutVpssPrm.baseCreateParams.notifyProcessLink = TRUE;
   ipcFramesOutVpssPrm.baseCreateParams.notifyNextLink = TRUE;
   ipcFramesOutVpssPrm.baseCreateParams.notifyPrevLink = TRUE;
   ipcFramesOutVpssPrm.baseCreateParams.noNotifyMode = TRUE;
  
   //prevLink->processLink->nextLink
   ipcFramesInDspPrm.baseCreateParams.inQueParams.prevLinkId = ipcFramesOutVpssId;
   ipcFramesInDspPrm.baseCreateParams.inQueParams.prevLinkQueId = 0;
   ipcFramesInDspPrm.baseCreateParams.outQueParams[0].nextLink =dspAlgId;
   ipcFramesInDspPrm.baseCreateParams.numOutQue = 1;
 
   ipcFramesInDspPrm.baseCreateParams.notifyPrevLink = TRUE;
   ipcFramesInDspPrm.baseCreateParams.notifyNextLink = TRUE;
   ipcFramesInDspPrm.baseCreateParams.noNotifyMode  = TRUE;
  
  
   dspAlgPrm.enableOSDAlg = TRUE;
   dspAlgPrm.enableSCDAlg = FALSE;
   dspAlgPrm.inQueParams.prevLinkId =ipcFramesInDspId;
   dspAlgPrm.inQueParams.prevLinkQueId = 0;
   dspAlgPrm.outQueParams[0].nextLink =  SYSTEM_LINK_ID_INVALID;//ipcBitsOutDspId;

   AlgLink_OsdChWinParams * chWinPrm = &dspAlgPrm.osdChCreateParams[0].chDefaultParams;
 
   /* set osd window max width and height */
   dspAlgPrm.osdChCreateParams[0].maxWidth  = 320;
   dspAlgPrm.osdChCreateParams[0].maxHeight = 64;
   chWinPrm->chId = 0;
   chWinPrm->numWindows = 1;
   chWinPrm->winPrm[0].enableWin=1;

   Chains_displayCtrlInit(chainsCfg->displayRes);
   System_linkCreate(ipcFramesOutVpssId, &ipcFramesOutVpssPrm, sizeof(ipcFramesOutVpssPrm));
   System_linkCreate(ipcFramesInDspId, &ipcFramesInDspPrm, sizeof(ipcFramesInDspPrm));
   System_linkCreate(dspAlgId, &dspAlgPrm, sizeof(dspAlgPrm));
 
   displayPrm[0].numInputQueues     = 1;
   displayPrm[0].activeQueue      = 0;
   displayPrm[0].inQueParams[0].prevLinkId  = ipcFramesOutVpssId;
   displayPrm[0].inQueParams[0].prevLinkQueId  = 0;
   displayPrm[0].displayRes     = chainsCfg->displayRes[0];
   displayPrm[0].forceFieldSeparatedInputMode  = FALSE;
   System_linkCreate(displayId[0], &displayPrm[0], sizeof(displayPrm[0]));

 
   Chains_memPrintHeapStatus();
   {
    System_linkStart(displayId[0]);
    System_linkStart(captureId);
    System_linkStart(dspAlgId);
    while(1)
    {
     ch = Chains_menuRunTime();
     if(ch=='0')
      break;
     if(ch=='v')
      System_linkControl(captureId, CAPTURE_LINK_CMD_FORCE_RESET, NULL, 0, TRUE);
     if(ch=='p')
      System_linkControl(captureId, CAPTURE_LINK_CMD_PRINT_ADV_STATISTICS, NULL, 0, TRUE);
    }
 
    System_linkStop(captureId);
    System_linkStop(dspAlgId);
    System_linkStop(displayId[0]);

 
    Chains_ipcBitsStop();
   }
 
   System_linkDelete(captureId);
   System_linkDelete(displayId[0]);
   System_linkDelete(dspAlgId);
   System_linkDelete(ipcFramesOutVpssId);
   System_linkDelete(ipcFramesInDspId);

   Chains_displayCtrlDeInit();
 
  }

i find that the OSD has run, because the printf() can be executed . what is the problem?

If you overwrite the buffer definitely display will not show .Pls put Vps_prints in your for loop to confirm the bytes are getting overwritten.Try doing Cache_wbInv after your for loop to ensure data is written to DDR

thanks a lot . I am sorry,  i am a newer , could you tell me more for details ？

hi，Badri Narayanan

if In buffer format is YUV420sp，how can I  change the value of pixel as 0？

char *y_buffer = pFrame->addr[0][0];

char *cbcr_buffer = pFrame->addr[0][1];

memset(y_buffer,0,pitch[0] * height); //Set Y pixels to 0x0

memset(cbcr_buffer,0,pitch[1] * height); //Set CbCr to 0x8080

thanks a lot，I have two question

1、I want to use my own algorithms replace osd in AlgLink_OsdalgProcessFrame inside.

Incoming video stream is SWOSD_FORMAT_YUV420sp,I want to process y_buffer, cb_buffer and cr_buffer respectively

but I don't konw how to extract cb_buffer and cr_buffer, respectively.

Do I need to create two arrays are used to store cb_buffer and cr_buffer?

like this:

 int i=0,j=0;

UInt8 *y_buffer = pFrame->addr[0][0];

UInt8 cbbuffer_arr[pFrameInfo->rtChInfo.height*(pFrameInfo->rtChInfo.width/4)];

UInt8 crbuffer_arr[pFrameInfo->rtChInfo.height*(pFrameInfo->rtChInfo.width/4)];

UInt8 *pBufferStart = pFrame->addr[0][1];

 for (i= 0; i<(pFrameInfo->rtChInfo.height*pFrameInfo->rtChInfo.width)>>1; i+=2)

{

    cbbuffer_arr[j] = *(pBufferStart+i);

    crbuffer_arr[j] = *(pBufferStart+i+1);

    j++;

}

/*----my algorithm interface------*/

YUV420_PROCESS(y_buffer,cbbuffer_arr,crbuffer_arr);

j=0;

for (i= 0; i<(pFrameInfo->rtChInfo.height*pFrameInfo->rtChInfo.width)>>1; i+=2)

{

     *(pBufferStart+i)  = cbbuffer_arr[j];

     *(pBufferStart+i+1)= crbuffer_arr[j];

    j++;

}

 Is it right?

2、If I do that in   AlgLink_OsdalgProcessFrame,whether I rewrite

UInt8 *y_buffer = pFrame->addr[0][0]+0x30000000;

UInt8 *pBufferStart = pFrame->addr[0][1]+0x30000000;