[pulseaudio-discuss] Bluetooth aptX codec

Jan Alexander Steffens jan.steffens at gmail.com
Wed Jun 20 15:35:42 UTC 2018

On Mon, Jun 18, 2018, 09:42 Pali Rohár <pali.rohar at gmail.com> wrote:

> On Sunday 17 June 2018 23:48:42 Arun Raghavan wrote:
> > On Sun, 17 Jun 2018, at 4:01 AM, Pali Rohár wrote:
> > > Hi! As you may know lot of bluetooth headsets support not only SBC, but
> > > also aptX codec. And new version of ffmpeg (4.0) has native aptX and
> > > aptX HD encoder and decoder. AptX codec itself is proprietary, but
> > > ffmpeg has clean-room implementation based on expired patent. What
> about
> > > adding support for aptX via ffmpeg into pulseaudio?
> > >
> > > --
> >
> > I'd actually like to delete the SBC code and replace it with a generic
> GStreamer bin. That would allow us to be codec agnostic, and support any of
> the codecs that are supported by GStreamer (which includes those that
> ffmpeg provides).
> This does not sound like a good idea. The only two relevant bluetooth
> codecs for most people are SBC and aptX.

Don't forget AAC. I've seen this one a lot in devices meant for use with
iPhones, which apparently don't have aptX. GStreamer has a lot of encoders
for it so this shouldn't be a problem unless it's some strange AAC variant.

There's also LDAC but I haven't seen it on a device yet.

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