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Dual processed on DM6446?

Lin Kuo-Wei
Prodigy 160 points

I have a question.

On ARM side, I use "Engine_open", "VIDDEC_create","VIDDEC_control","VIDDEC_process","VIDDEC_delete","Engine_close",etc

to call DSP. In "VIDDEC_process",I jumped to DSP side from ARM side,and executed the Algorithm on DSP side .

When DSP executed its Algorithm, the state of ARM is idle??

How can I tell ARM to keep doing the remaining things?

Thanks all.

 

  • 0
    TI__Mastermind 37340 points

    When ARM calls DSP via VIDDEC_process, the ARM thread that made this function call blocks until the DSP-side returns; however, any other thread running on Linux can still do work.  By default, the Linux scheduler will allocate time to other threads when the current thread blocks.  Therefore, to answer your question, you simply need to create another thread within your process or another process (e.g. run a different program) for the ARM to continue to do work while that one thread that called xxx_process blocks.

  • 0 in reply to Juan Gonzales
    TI__Genius 17205 points

    Juan's solution is correct, and is what most users, including the DVSDK demos, do.

    Additionally, you may also want to look at the processAsync()/processWait() variants of the process() call.

    Chris

  • 0 in reply to Juan Gonzales
    Prodigy 160 points

    I have a little question.

    Is "pthread_cond_wait" similar to "VIDDEC_process"??

    Thanks all