DM36x Linux hang when running both MPEG-4 HDVICP Encoder and H.264 Encoder

Chris Richardson77843

Hi,

I am in the process of adding MPEG-4 encoding to my existing H.264/MJPEG encoding app running on DM365 and DM368. I notice if I try to run MPEG-4 HDVICP encoder and H.264 encoder at the same time my whole linux environment is stopped and I have to reboot my device.

The first thing I tried was to place a shared mutex around each Venc1_process call (I am using DMAI), which had no effect.

Then I searched and found a thread (http://e2e.ti.com/support/embedded/multimedia_software_codecs/f/356/t/157273.aspx), where a bug is acknowledged in the H.264 encoder, and tried the h264Enable_hdvicp workaround suggested there. That did not help either. Also in the same thread, Veeranna mentions that another H.264 encoder release was going to be done that would fix this issue, but I have not seen a new release yet. I did notice the DM36x codecs page (http://software-dl.ti.com/dsps/dsps_public_sw/codecs/DM36x/index_FDS.html) was updated on August 9th, but the H.264 encoder is still at the same version it was during the previous release in January 2012.

Does anybody have other ideas on what I can do to make these two encoders work at the same time? For reference, here are the versions of the components I am using:

DVSDK 4.02 (with updated codecs shown below)
codec-engine   2.26.02.11
dm365mm-module 01.00.03
linuxutils   2.26.01.02
framework-components   2.26.00.01
H264ENC   02.30.00.04 (January 2012)
MPEG4ENC-HDVICP   02.00.00.10 (November 2011)

Thank you for your time,

Chris

over 13 years ago

0 Veeranna Hanchinal over 13 years ago

TI__Expert 8465 points

Hi Chris,

After the fix H264 encoder release did not happen. Work around shuld have worked, are you converting basptr value to virtual and using it? before posting the work around i have verified it at our end it works fine(I used the virtaul address as 0x42281000 ).

Thanks,

Veeranna

0 Chris Richardson77843 over 13 years ago in reply to Veeranna Hanchinal

Intellectual 435 points

Hi Veeranna,

I am converting the physical address to virtual using the following code:

void h264Enable_hdvicp()
{
...
int fd = open("/dev/mem", O_RDWR);

   // [EDIT: include the definition of MAP_SIZE.]
   #define MAP_SIZE 0x2000
   void * virtualAddress = mmap(NULL, MAP_SIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0x1C40000);

volatile int basptr = (int)virtualAddress;

...
}

Does this look correct to you?

Thanks,

Chris

0 Chris Richardson77843 over 13 years ago in reply to Chris Richardson77843

Intellectual 435 points

Hi Veeranna,

The problem in this case was my incorrect use of mmap. I changed the mmap line to use MAP_SHARED instead and it is working:

void * virtualAddress = mmap(NULL, MAP_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0x1C40000);

However, I don't view having to add this whole h264Enable_hdvicp function to my code as a great workaround for this situation. It would be much better if the released codec from TI would contain this fix. Otherwise I will have to remember in the future to test every new codec release with and without this workaround, rather than just updating my codec now and having a supported fix.

Thanks,

Chris

0 Veeranna Hanchinal over 13 years ago in reply to Chris Richardson77843

TI__Expert 8465 points

Hi Chris,

Thanks for the update; YES its just workaround not final fix, we are working on release, there are some other minor bugs reported so we are fixing them, in a month we will be releasing next version.

Thanks,

Veeranna

0 Veeranna Hanchinal over 12 years ago in reply to Veeranna Hanchinal

TI__Expert 8465 points

Hi Chris,

Fix is available with H.264 encoder version 02.30.00.06, and you can download the codec from http://software-dl.ti.com/dsps/dsps_public_sw/codecs/DM36x/index_FDS.html

Thanks,

Veeranna

0 Chris Richardson77843 over 12 years ago in reply to Veeranna Hanchinal

Intellectual 435 points

Hi Veeranna,

Thank you for posting the update here. I have now tested and verified that the new version of the H.264 encoder fixes the metioned issue.

Thanks,

Chris

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DM36x Linux hang when running both MPEG-4 HDVICP Encoder and H.264 Encoder