Linux/PROCESSOR-SDK-AM57X: Working with the IVA-HD subsystem

Tom W

Part Number: PROCESSOR-SDK-AM57X
Other Parts Discussed in Thread: AM5728

Tool/software: Linux

Hello,

I have been trying to install the necessary tools to develop for the IVA-HD on my EVM. Preferably, I would like to be able to build and debug the codec application on a host PC running Code Composer. As to building and running the IPUMM software on the host machine, I have been following the wiki page's guide:

However, I have noticed several things that have prevented my compilation:

1) The available build target platforms do not mention the AM series. I have been operating under the assumption that this does not matter, considering that the OMAP54XX is likely a reference to the SGX54XX GPU in the AM5728. Is this correct?

2) I may already be incorrect in assuming that the IVA-HD software is not pre-installed with the Linux Software SDK. Is it included with the standard install?

3) If it is not, then I have some issues building the IPC system on the host machine. Attempting to install the Linux and BIOS side is resulting in some build errors relating to the compiler call in the makefile. it is attempting to find pthread.h and failing, due to several errors about missing pthread.h-related functions. However, as my machine is running Ubuntu 14.04 LTS, I know for a fact that I have pthread.h available due to POSIX (semi) compliance.

If these questions do not make any sense, then I would appreciate some kind of informal guide on how to develop a codec application for the AM57x EVM on an Ubuntu host machine with the Processor SDK installed.

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

Hi,

The software team have been notified. They will respond here.

0 Manisha Agrawal over 8 years ago

TI__Mastermind 22946 points

Refer to viddec3test and videnc2 example codec application in below for developing codec application.
git.ti.com/.../master

It is better to build the application using Makefile on host machine and not through code composer and debug using printfs . If you are interested to know why codec process call failed, then parse the error code returned by process call. Check how the error codes being extracted in viddec3test and videnc2test application. You can refer to the codec user guide document to learn codec error handling. As example, H.264 user guide "Error Handling" section can be referred to decode the error code returned by decoder.

You can download the codec document from following git repo -
git.ti.com/.../codecs

Documents are placed inside doc folder of the respective codec.
git.ti.com/.../H264_Decoder_HDVICP2_UserGuide.pdf

0 Tom W over 8 years ago in reply to Manisha Agrawal

Expert 1280 points

Sounds good, I've been through these repos and manuals before, however. Which led me to making this post in the first place.

Do I remake the IPUMM project? The omapdrmtest project? Both? Of note is that the omapdrmtest does not build on the host machine due to the package libdrm_omap being armhf only, at least as far as I have been able to find. Even after adding armhf repos to my x86 host machine's package repository, libdrm_omap does not install. This package is however installed on the EVM natively, as I've found.

So this leads me to the question: do I merely clone down the omapdrmtest project to my EVM, and edit a viddec3 program inside that directory, then make it? Or is there a way to cross compile an IVA-HD program from my x86 host machine to the EVM?

0 Manisha Agrawal over 8 years ago in reply to Tom W

TI__Mastermind 22946 points

You do not need to rebuild IPUMM project. viddec3test and videnc2test pre-built binaries are part of PLSDK filesystem. If you want to rebuild these application, then you will need to rebuild omapdrmtest. You can rebuild omapdrmtest project through Yocto build setup. Check this wiki link -

processors.wiki.ti.com/.../Processor_SDK_Building_The_SDK

0 Tom W over 8 years ago in reply to Manisha Agrawal

Expert 1280 points

And if I would like to create my own programs that leverage the decoder system? I am looking to create a low-latency decoder that takes advantage of the mjpeg decoder's fixed-length decoding

0 Tom W over 8 years ago in reply to Manisha Agrawal

Expert 1280 points

Second note: omapdrmtest does not compile on the EVM running Processor SDK v 3.02.00.05, something about libavcodec not being found, however that package is indeed installed. I attempted to build omapdrmtest with ./autogen.sh --prefix=/usr && make && make install

The error was that the avcodec library was not found when attempting to compile fliptest.c

/usr/lib/gcc/arm-linux-gnueabi/5.3.1/../../../../arm-linux-gnueabi/bin/ld: cannot find -lavcodec.

I've also noticed that the most recent commit for omapdrmtest implements a check for this package, perhaps it is not working properly?

0 Manisha Agrawal over 8 years ago in reply to Tom W

TI__Mastermind 22946 points

As suggested, please use Yocto project to build omapdrmtest.

0 Tom W over 8 years ago in reply to Manisha Agrawal

Expert 1280 points

Ah yes I appear to have missed that. Would I also need to use Yocto to rebuild a project of my own that uses the IVA-HD decoder?

0 Manisha Agrawal over 8 years ago in reply to Tom W

TI__Mastermind 22946 points

If you are able to take care of dependencies in your Makefile, then no issue. But if you run into problem, then better to build using Yocto.

0 Tom W over 8 years ago in reply to Manisha Agrawal

Expert 1280 points

So, if I want to make an application in C that uses the IVA-HD decoder to decode with custom settings (ie slice-level) do I have to always use Yocto to build it? Or if I can manage my dependencies in the Makefile, then I should be in the clear? I'd like to avoid having to rebuild the processor SDK with Yocto if I have to.

0 Manisha Agrawal over 8 years ago in reply to Tom W

TI__Mastermind 22946 points

Yocto is not mandatory. If you can manage the dependencies, you are good with standalone Makefile. All the applications inside example-application folder in PLSDK package can be built standalone.

0 Tom W over 8 years ago in reply to Manisha Agrawal

Expert 1280 points

Excellent, many thanks.

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Linux/PROCESSOR-SDK-AM57X: Working with the IVA-HD subsystem