[pulseaudio-discuss] Bluetooth aptX codec

[Pali Rohár]

On Monday 30 July 2018 17:04:55 Arun Raghavan wrote:
> On Mon, 30 Jul 2018, at 12:42 PM, Pali Rohár wrote:
> [...]
> > I looked and there is absolutely nothing about A2DP codec parameter
> > selections. So really does not help.
> 
> Okay, I feel like this conversation has been us talking past each other, so let me try to summarise what I'm saying more clearly:
> 
> 1. The BlueZ modules will, possibly based on modargs, expose a set of supported codecs. Yes, that includes codec parameters, the knowledge of which the endpoint needs to have. If you have ideas for making this modular, I'm open to suggestions.
> 
> 2. For the specific process of RTP payload/depayload and selection of a codec implementation for encode/decode, I believe we should construct and use a GStreamer bin, so as to not have to offload that choice to the system integrator rather than having to make that choice in PulseAudio. I feel strongly enough about not linking to specific codec implementations that any approach that does that is a NACK from me. I realise we already have this for SBC, but I do not want to add any more.

Look at my last (v2) patch series for aptX. Here I created some
modularisation of codecs and addition of another codecs would be easier.

I have not used Gstreamer as it does not help me -- it does not provide
module for A2DP codec negotiation (it is not static list of parameters
as you imagine, but negotiation function) nor it does not support aptX
codec.

-- 
Pali Rohár
pali.rohar at gmail.com