How can I get source code about and libnvmm*.so ??

Hi, all.
I want to use Jetson’s HW encoder directly.

So, I have searched about HW encoder.
I think that Jetson’s HW encoder is related /dev/tegra_avpchannel
And the device driver is handled by /usr/lib/arm-linux-gnueabihf/tegra/libnvmm*.so and same directory


I think that gstreamer plugin in Jetson’s BSP (nv_omx~~~) is using ~~~


Where can I get the source code about and libnvmm*.so??

Plz, help me.

Those are low level proprietary libraries, so there’s no documentation or sources for them, unfortunately.