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How the video capture decoder(TVP7002) is running?

zeyu yang
Prodigy 20 points
Other Parts Discussed in Thread: TVP7002

Hello,
I am using EZSDK5.05.02 on the DM8148-EVM .
I want to capture video source from the I/O EXP board TVP7002 chip.
1, I want to know the Program flow from the OMX component to the TVP7002'drive. A flow chart of the program will be the best.
2, I would like to know the difference between M3 nuclear running dm8148_hdvpss.xem3 program and dm8148_hdvpss_V4L2.xem3 program to interact with VPSS.

  • 0
    TI__Guru* 80190 points

    Hello,

    zeyu yang said:
    I want to capture video source from the I/O EXP board TVP7002 chip.

    You could use OMX. You could check for capture_encode example in //ti-ezsdk_dm814x-evm_5_05_02_00/component-sources/omx_05_02_00_48/examples/ti/omx/demos

    For more information yo could check:

    /ti-ezsdk_dm814x-evm_5_05_02_00/component-sources/omx_05_02_00_48

    OMX_05_02_00_48_UserGuide.pdf

    zeyu yang said:
    2, I would like to know the difference between M3 nuclear running dm8148_hdvpss.xem3 program and dm8148_hdvpss_V4L2.xem3 program to interact with VPSS



    dm814x_hdvpss.xem3:
       - This is use for OpenMax application.
            * Display driver is controlled by A8 with OpenMax . Does not support V4L2.
            * Capture driver is controlled by A8 with OpenMax .  Does not support V4L2.
       - This can NOT be used to use I2C from A8 during HDVPSS driver is working.
       - The feature is same as dm814x_hdvpss_v4l2_xem3 without I2C control.


    dm814x_hdvpss_v4l2_xem3:
        - This is use for V4L2 application.
            * Display driver is controlled by A8 with V4L2.  Does not support OpenMax.
            * Capture driver is controlled by A8 with V4L2.  Does not support OpenMax.
       - This can be used to use I2C from A8 during HDVPSS driver is working.
       - The feature is same as dm814x_hdvpss_xem3 without I2C control

    Best Regards,

    Margarita

  • 0 in reply to Margarita Gashova
    Prodigy 20 points

    Hi Margarita,

    Glad to see your reply.
    Can I get more in-depth description?

     - This can NOT be used to use I2C from A8 during HDVPSS driver is working.

  • 0 in reply to Margarita Gashova
    Intellectual 760 points

    Margarita said:
    dm814x_hdvpss.xem3:

       - This is use for OpenMax application. 
            * Display driver is controlled by A8 with OpenMax . Does not support V4L2.
            * Capture driver is controlled by A8 with OpenMax .  Does not support V4L2.
       - This can NOT be used to use I2C from A8 during HDVPSS driver is working.
       - The feature is same as dm814x_hdvpss_v4l2_xem3 without I2C control.


    dm814x_hdvpss_v4l2_xem3:
        - This is use for V4L2 application.
            * Display driver is controlled by A8 with V4L2.  Does not support OpenMax.
            * Capture driver is controlled by A8 with V4L2.  Does not support OpenMax.
       - This can be used to use I2C from A8 during HDVPSS driver is working.
       - The feature is same as dm814x_hdvpss_xem3 without I2C control

    does this mean that I can not use OpenMax framework and V4L2 framework at the same time?

  • 0 in reply to qiuxicj MESSN
    TI__Guru* 80190 points

    Hello,

    qiuxicj MESSN said:
    does this mean that I can not use OpenMax framework and V4L2 framework at the same time?

    Correct.

    You should load dm814x_hdvpss_v4l2_xem3 or  dm814x_hdvpss.xem3

    Best Regards,

    Margarita