• State Resolved
  • Locked Locked
  • Replies 5 replies
  • Subscribers 99 subscribers
  • Views 472 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

How to Stop the H264 decoder

xiansheng shao
Prodigy 240 points

ENV:  dm6467t + CCS4.1 + dm6467_h264dec_1_10_05_03_production + DSP/BIOS 5.41

I create a project, and then create a H264 decode  task in DSP/BIOS (only one task ecpect idle task in this project , and the H264decode use the dm6467_h264dec_1_10_05_03_production  code). When i use this project to decode the 264 raw file continuous  (without task switch), the project running OK; But when i use the TSK_sleep blocked the decode task, the decode task cannot run back. If i don't use the decode function , the task switch is ok.

If i don't call the decode code, i can call TSK_sleep() or other SEM_pend() function to blocked my task  and switch task successful.

When i call the decode code and make a breakpoint before call TSK_sleep(), I found that there are a lot of  same message: SEM: post _MEM_mutex (0x8810f524) in the ROV(CCS4.1) LOG_system info. And then i run the TSK_sleep() and halt the task(use the halt button in ccs4,because the task in running and not run back my task), i found the next message in LOG_system: SEM: post _MEM_mutex (0x8810f524); SWI: begin KNL_swi (TSK scheduler) (0x118186f8);TSK: blocked TSK_vehicle (0x83f2406c);TSK: running TSK_idle (0x83f2400c);SWI: end KNL_swi (TSK scheduler) (0x118186f8) state = still ready (The TSK_vehicle is my decode tsk).And i also found my task state in the ROV is "unknown",  the idle task state is "running" . When i halt the task everytime, i found the task run in CSL_intcVectorTable() function (the function in the decode code lib) by use the Disassembly Window. I also found the B3 register address is the "fxnrt" index.  I don't know what's happen in my task.  Because I don't know what happen in the decode lib,maybe there are very offen mutex between dsp,HDVICP,EDMA and so on, so i don't know if the decode lib process is non-blocking process (i don't have the source code of decode lib).  If the process is non-blocking, i want to know how to block the decode process lib.

I also test my task, use the decoder routine to decode just one frame, and free all the resource in code. But that  also cannot blocked my task.

Now, i am afraid that the codec decoder cannot stop after decode just one frame, but i cannot found the answer in user guide of the dm6467_h264dec_1_10_05_03_production and the internet. Ireally want to know if the do-while loop decode process moudule in dm6467_h264dec_1_10_05_03_production's routine can be suspended?

I also found that  if i use the TSK_sleep(X_Ms), my task will be the run to "unknown" state. I means if the task switch have the time thresh, such as 10ms, the task will run in "unknown" state. But if i replace the time with "SYS_FOREVER", my task will be ok (run in the "blocked" state).

And i also found that if i run the decode code, the interrupt arm2dsp has no effection,the HWI  isr will not run. (In my program the am2dsp interrupt will trigger a HWI isr) The decode coder will influence the HWI isr ? 

what's happen? My dm6467 is 990MHz and the clock setting looks like correct. 

Thanks.

  • 0
    TI__Mastermind 18320 points

    This thread appears to have moved to the BIOS forum from somewhere else; however, it doesn't seem to really be a BIOS-specific issue.  I am moving it (back?) to the Multimedia Codecs forum in hopes that it will get a faster response there.

    Dave

  • 0 in reply to David Friedland
    TI__Mastermind 37666 points

    Hi,

    I think if you didn't call process call, then h264dec will stop. So I think it is better to give some message to the decoder task if you want it to stop. And decoder task just doesn't call process.

  • 0 in reply to Chris Meng
    Prodigy 240 points

    Thank you for your replay.

    I know that if idon't call the h264dec, the h264dec will stop. But my problem is that if i call the h264dec, my task cannot call the TSK_sleep() function. There are also some other similar problem, such as the SEM_pend() timeout function also cannot run back.

    I found that if i call RMAN_assignResources() use the decode lib, the TSK_sleep() will not run back for ever.

    I just create a simple project, and just have a task of h264decode. I don't know if this situation will happen in your computer? Could you help me to try this decode function?

    My env is DM6467T + CCS4.1 + DSP/BIOS 5.41 + XDAIS 6.25 + codec_engine_2_10_01+ dm6467_h264dec_1_10_05_03_production + dm6467_hdvicp_1_01_020_production.

    I am crazy for this problem, but i don't know what's happen in the RMAN_assignResources() function of h264decode lib.

  • 0 in reply to xiansheng shao
    Prodigy 240 points

    I also found that if i run the H264decode function，the systick will not add any more and the PRD tick count will not add. That means the function PRD_F_tick() called by PRD_clock of CLK moudle will not be called， and then the KNL_swi also will not be called. As the pic depict.

    In the rov result, the LOG_system line 3957 and line 3958 is correct， but then the CLK will add and the PRD will not add. The systick is lost， any DSP/BIOS API use the timeout function will lose effectiveness. What‘s happen to the CLOCK ? 

    Thanks.

  • 0 in reply to xiansheng shao
    Prodigy 240 points

    I have found where is the problem.

    Because the h264decode lib example run in the dsp without the BIOS, and then i add the BIOS to the example. So when i run before the H264decode code, the interrupt vector table is built by the BIOS; and after i run the h264decode code, the interrupt vector table is re-built by the CSL lib function in HDVICP_configure function. Even if the interrupt is enable in IER, the ISTP was changed by CSL, the interrupt isr will not be found correctly.

    Thanks.