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Question about v4l2 & fb & omx api?

chris liu
Prodigy 240 points

hi Ti expert:   

      What is the releation between v4l2 api & fb api & omx api ?Are the independent to each other?
    We know that we should show osd using fb api and video using v4l2, can they show on a same screen?
    How to do this?
   Can we return to 6467 software architecture using DMAI?
  • 0
    TI__Mastermind 20245 points

    Hi,

    V4L2 is standard application APIs on top of HDVPSS hardware for display and capture. OMX are application level APIs based on openMax media library. V4L2 is for display and capture. while open max supports encode, decode and processing APIs in addition to capture and display APIs. Details about open max could be found at http://www.khronos.org/openmax/

    You can do OSD using V4L2 and fbdev on same screen.   DMAI is not ported on DM816x/DM814x.

    Regards,

    Hardik Shah

  • 0 in reply to HardikShah
    Prodigy 240 points

    Hi Hardik,

        Thanks  for your reply at first.

        It seems that the only way to use the function  "encode, decode and processing" is using the open max apis, is it right?

        Is there any sample application using the V4L2 & FB apis at the same time under  the psp packages?

       Regards,

      Chris Liu

  • 0 in reply to chris liu
    TI__Guru 66120 points

    Chris,

    Yes OMX is the only way to go for encode/decode and processing. As for the v4l2/fb sample, we do provide such examples in the PSP please check saLoopback, saLoopbackFBdev.

    Regards,

     

    yihe