In and out buffers of HEVC encoder on slave DSPs

Andrey Lisnevich

Hi,

I am trying to run HEVC encoder on multiple DSPs. When I call control XDM_GETBUFINFO on a slave DSP on core 0 I get the following:

[2014-12-19 13:58:51] Create encoder buffers
[2014-12-19 13:58:51] minNumInBufs 0
[2014-12-19 13:58:51] minNumOutBufs 0

On master DSP the call returns correct values:

[2014-12-19 13:58:51] Create encoder buffers
[2014-12-19 13:58:51] minNumInBufs 3
[2014-12-19 13:58:51] minNumOutBufs 1
[2014-12-19 13:58:51] minInBufSize[0] 2073600 0
[2014-12-19 13:58:51] minInBufSize[1] 518400 0
[2014-12-19 13:58:51] minInBufSize[2] 518400 0
[2014-12-19 13:58:51] minOutBufSize[0] 3670016 0

Can you point me what is wrong?

Regards,

Andrey Lisnevich

over 9 years ago

0 Kuladeepak Gowda over 9 years ago

Intellectual 785 points

Hi Andrey,

Input Buff info is given for only global master.
So codec is given zero buff info for local master and slave cores, As this info is insignificant for these cores.

Regards

Kuladeepak

0 Andrey Lisnevich over 9 years ago in reply to Kuladeepak Gowda

Genius 3305 points

http://e2e.ti.com/support/embedded/multimedia_software_codecs/f/356/t/366721

It is told there that it was better to replicate input YUV frame in DDR memory of all DSPs.

In my case I transfer the same YUV data via PCIe to all DSPs that run HEVC.

Input buffer size is significant for all DSPs because at least one core of each DSP should do input buffer management - somehow replicate YUV data in DSP memory and remove it when it is not needed.

Am I right?

Regards,

Andrey Lisnevich

0 Ramamohana Reddy over 9 years ago in reply to Andrey Lisnevich

Intellectual 880 points

Hi Andrey,

Yes it is better to copy input to each chip for performance.

It depends on application how it copies the input. In current application which we are using (MCSDK) global master will sync with codec and updates input buffers accordingly on each chip/DSP.

You can request if it is required to update buffer info by local masters also so that we will try to incorporate in upcoming releases.

Best Regards

Rama Mohana Reddy

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In and out buffers of HEVC encoder on slave DSPs