[libre-riscv-dev] Video planning

[Lauri Kasanen]

On Mon, 30 Dec 2019 22:14:02 +0000
Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:

> i wasn't aware of the need for audio acceleration: thank goodness you
> raised it.  we'll have to discuss with michiel because we've now been
> through the independent external review process.  as long as it's not
> "completely mad" i.e. like 50% of the total budget i see no reason why
> it wouldn't be included.
>
> i last worked on e.g. libspeex back in 2004, a company i worked for
> sponsored the developer to write an ARMEL asm code block for a 90mhz
> ARM9 processor.  lauri, do you have any similar pointers to relevant
> pre-existing code/assembly blocks so we have a rough idea of what's
> involved?

ffmpeg's code is in the same place as for video:
https://github.com/FFmpeg/FFmpeg/tree/master/libavcodec/x86

The audio parts are rather small in comparison to video, but give 2-3x
speedups on x86.

- Lauri