Add bindings for roc_sender_encoder and roc_sender_decoder

[gavv]

Follow-up for #118.

We already have bindings for roc_sender and roc_receiver (see sender.go and receiver.go).

Roc Toolkit 0.3 introduced a networkless version of this API: roc_sender_encoder and roc_sender_decoder. We need to add bindings and unit tests for this new API.

Documentation for C API can be found here: https://roc-streaming.org/toolkit/docs/api/reference.html

C headers for new API are here: sender_encoder.h, receiver_decoder.h.

[snel1496]

I can give this one a go, feel free to assign

[gavv]

@snel1496 Thanks, you're welcome!

[snel1496]

@gavv I am wondering if you would be able to give any guidence
I am familiar with go but this is the first time I am jumping into a go project that is utilizing cgo

when I try and build (with make build / make test / or running the equivelant go commands in the roc directory I keep getting

go build .
# github.com/roc-streaming/roc-go/roc
./receiver.go:223:28: could not determine what C.roc_latency_tuner_backend refers to
./receiver.go:224:28: could not determine what C.roc_latency_tuner_profile refers to

I am on fedora and I have installed the relivant packages referenced in the readme an in the Hacking.md files

I will keep looking into it but not sure why I am running into these build issues.

EDIT if anyone comes across this, the roc packages in the dnf distro are likely out of date, building the c source files from source and installing them works much better. I would argue that there may be value to changing the hacking docs to recommend installing from source