[pulseaudio-discuss] [PATCH v9 0/8] Bluetooth A2DP codecs

Luiz Augusto von Dentz luiz.dentz at gmail.com
Fri Apr 26 10:09:00 UTC 2019

Hi Pali,

On Fri, Apr 26, 2019 at 11:34 AM Pali Rohár <pali.rohar at gmail.com> wrote:
> On Friday 26 April 2019 11:20:26 Luiz Augusto von Dentz wrote:
> > I have an assert when I use a different headset which does support apt-X HD:
> >
> > https://gist.github.com/Vudentz/0d6b6f2ad08524db69a3e223e26bc80d
> I have not tested aptX HD, nor aptX Low Latency. I tested only (classic)
> aptX. I looked at code and there is incorrect calculation of buffer
> block size for aptX HD. Try following:
> static void get_buffer_size_hd(void *codec_info, size_t link_mtu, size_t *decoded_buffer_size, size_t *encoded_buffer_size) {
>     /* aptX HD compression ratio is 4:1 and we need to process one aptX HD sample (6 bytes) at once */
>     *encoded_buffer_size = (link_mtu/6) * 6;
>     *decoded_buffer_size = *encoded_buffer_size * 4;
> }

Will try, btw if I disable aptX HD it attempts to pick up UHQ2 but it
asserts as well:


It seems that fill_preferred_configuration and can_accept_capabilities
are not agreeing with one another, so we got a transport but no

Luiz Augusto von Dentz

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