mirrors/pipewire
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pipewire/pipewire.git synced 2025-11-15 07:00:05 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

bluez5: add aptx-LL codec

Browse source 
Support the low-latency variant of the aptx codec.

The magic mostly seems to be on the device side, since the stream is the
same as standard aptx, but latency is smaller even if stream/packet
sizes are the same.

Sound output latency is noticeably less than with the standard aptx.
Tested on Sennheiser HD 250 / Avantree Aria Pro.

The codec in principle also supports bidirectional duplex streams,
but that is not implemented here.
This commit is contained in:
Pauli Virtanen 2021-08-15 20:15:58 +03:00 • committed by Wim Taymans
parent 73994feda9
commit 90b62ba2b3
6 changed files with 143 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

1
spa/include/spa/param/bluetooth/audio.h
View file

@ -44,6 +44,7 @@ enum spa_bluetooth_audio_codec {
SPA_BLUETOOTH_AUDIO_CODEC_APTX,
SPA_BLUETOOTH_AUDIO_CODEC_APTX_HD,
SPA_BLUETOOTH_AUDIO_CODEC_LDAC,
SPA_BLUETOOTH_AUDIO_CODEC_APTX_LL,
/* HFP */
SPA_BLUETOOTH_AUDIO_CODEC_CVSD = 0x100,

1
spa/include/spa/param/bluetooth/type-info.h
View file

@ -48,6 +48,7 @@ static const struct spa_type_info spa_type_bluetooth_audio_codec[] = {
{ SPA_BLUETOOTH_AUDIO_CODEC_APTX, SPA_TYPE_Int, SPA_TYPE_INFO_BLUETOOTH_AUDIO_CODEC_BASE "aptx", NULL },
{ SPA_BLUETOOTH_AUDIO_CODEC_APTX_HD, SPA_TYPE_Int, SPA_TYPE_INFO_BLUETOOTH_AUDIO_CODEC_BASE "aptx_hd", NULL },
{ SPA_BLUETOOTH_AUDIO_CODEC_LDAC, SPA_TYPE_Int, SPA_TYPE_INFO_BLUETOOTH_AUDIO_CODEC_BASE "ldac", NULL },
{ SPA_BLUETOOTH_AUDIO_CODEC_APTX_LL, SPA_TYPE_Int, SPA_TYPE_INFO_BLUETOOTH_AUDIO_CODEC_BASE "aptx_ll", NULL },
{ SPA_BLUETOOTH_AUDIO_CODEC_CVSD, SPA_TYPE_Int, SPA_TYPE_INFO_BLUETOOTH_AUDIO_CODEC_BASE "cvsd", NULL },
{ SPA_BLUETOOTH_AUDIO_CODEC_MSBC, SPA_TYPE_Int, SPA_TYPE_INFO_BLUETOOTH_AUDIO_CODEC_BASE "msbc", NULL },