Two processes accessing DCE on DRA7xx

Mahi

Hi,

I have a requirement where two processes needs to be created(each runs on encoding use case). Could you please provide me the following information

1. Is DCE multiinstantiable (can dce_init be done multiple times)

2. If not can I call dce_init() in one process and use the same handle in another process to create the encoding instances

3. If (2) is possible how thread/process safe it is to concurrently access the dce from two different processes?

Thank you inadvance

Regards,

Mahi

over 8 years ago

0 Mahi over 8 years ago

Intellectual 310 points

Can someone please respond for the above query?

Thank you in advance
Mahi

0 Ramprasad over 8 years ago in reply to Mahi

TI__Mastermind 30480 points

Hi Mahi,
Refer viddec3test.c, dce_init() is called in decoder_open(). so for dual decode case, dce_init will be called twice.
You will get same fd and dev in both the cases. Omap-drm will use a refcount to check how many times dce_init is called.

0 Mahi over 8 years ago in reply to Ramprasad

Intellectual 310 points

Thanks Ramprasad

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Two processes accessing DCE on DRA7xx