DM6437 - problem with using Video0 and OSD0 - number of frames\sec falls

Igor

Hello!

I created two video channels - Video0 and OSD0 and channel the cursor

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hGioVpbeVid0 = FVID_create("/VPBE0",IOM_INOUT,NULL,&vpbeChannelParams,NULL);

hGioVpbeVenc = FVID_create("/VPBE0",IOM_INOUT,NULL,&vpbeChannelParams,NULL); (VENC само собой)

hOsd0Handle = FVID_create ("/VPBE0",IOM_INOUT, NULL,&vpbeChannelParams,&gioAttrs);

hCursorHandle = FVID_create("/VPBE0",IOM_INOUT,NULL,&cursorChannelParams,&gioAttrs);

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Then in the main body of the program do the separate image processing in these channels

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/* loop forever performing video capture and display */

while (!done && status == 0) {

/* grab a fresh video input frame */

FVID_exchange(hGioVpfeCcdc, &frameBuffPtr);

process_image_color( (void*)(frameBuffPtr->frame.frameBufferPtr), 480, 640);

BCACHE_wbInv((void*)(frameBuffPtr->frame.frameBufferPtr), 576*720*2, 1);

process_2D2D( (void*)(frameBuffPtr->frame.frameBufferPtr), 576, 720);

BCACHE_wbInv((void*)(osd0AllocFB->frame.frameBufferPtr), 128*128, 1);

/* display the OSD frame */

FVID_exchange(hOsd0Handle,&osd0AllocFB);

/* display the video frame */

FVID_exchange(hGioVpbeVid0, &frameBuffP

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The problem is that when using the OSD channel(FVID_exchange (hOsd0Handle, & osd0AllocFB);)the number of frames / sec falls sharply.

Visually -in two times.
Does anyone can tell - is it normally or something I'm doing wrong?
Thank you.
Igor.

over 14 years ago

0 Sandeep Krishnaswamy over 14 years ago

TI__Expert 7290 points

Hi Igor,

Could you please mention the BIOS PSP version, which you are using currently?

Regards,

Sandeep K

0 Igor over 14 years ago in reply to Sandeep Krishnaswamy

Intellectual 630 points

Hi Sandeep,

bios_5_41_04_18

thanks,

Igor

0 Sandeep Krishnaswamy over 14 years ago in reply to Igor

TI__Expert 7290 points

Hi Igor,

Basically I want to know the PSP release version, so that i can go through the driver and analyse the problem.

Regards,

Sandeep K

0 Igor over 14 years ago in reply to Sandeep Krishnaswamy

Intellectual 630 points

Sorry,

dvsdk_1_11_00_00,

pspdrivers_1_10_03,

CCS v3.3.3.3.38.2,

CGT 7.0.3,

XDC 3.20.01.51

0 Sandeep Krishnaswamy over 14 years ago in reply to Igor

TI__Expert 7290 points

Hi Igor,

The FVID_exchange() internally calls GIO_submit() without the callback function (refer fvid.h). So the GIO_submit() without callback function is a synchronous call. So the control comes back to the application only after the completion of IO. So this might be causing some latency. Therefore the frame rate has reduced once after introducing the FVID_exchange() for OSD. This is inevitable.

To confirm this, what you can do is, calculate the time taken for FVID_exchange() of OSD by using the appropriate BIOS API's, like,

=========================================================================================================

/* Taking snapshot of Low resolultion timer count */
initLTimeVal = CLK_getltime();

/* Taking snapshot of High resolultion timer count */
initHTimeVal = CLK_gethtime();

FVID_exchange(......);

    /* Capture the End Time */
    EndHTime = CLK_gethtime();
    EndLTime = CLK_getltime();

   /** Calculating the time elapsed in milli sec using LOW resolution timer */
    /* Calculate the difference in L time (low resolultion time)             */
    if(EndLTime >= initLTimeVal)
    {
           /* If 'L' clk is not wraped */
             TotalLtime = (EndLTime - initLTimeVal) ;
     }
    else
    {
         /* If 'L' clk is wraped      */
         TotalLtime = (0xFFFFFFFF - initLTimeVal) + EndLTime;
    }

/* calculate absolute time in cpu cycles from the L time counter */
LCPUcycles = TotalLtime * CLK_cpuCyclesPerLtime();

/* calculate absolute time in milli secs from the Low resolution counter */
AbsoluteLTime = LCPUcycles / GBL_getFrequency();

==================================================================================================================

Note: Refer BIOS user guide for more info.

Once this is confirmed, we can work on avoiding the latency.

Thanks and Regards,

Sandeep K

0 Igor over 14 years ago in reply to Sandeep Krishnaswamy

Intellectual 630 points

Sandeep, thank you very much.

I will inform about the results. Where should I put the information? Here?

Thanks and regards,

Igor

0 David Friedland over 14 years ago in reply to Igor

TI__Mastermind 18320 points

Yes, please -- let's keep it in the forum thread if possible.

Processors

Processors forum

DM6437 - problem with using Video0 and OSD0 - number of frames\sec falls