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[BlueZ,v2,1/2] lib: Add constant for 16 bits transparent voice setting

Message ID 20241216184613.135538-2-frederic.danis@collabora.com
State New
Headers show
Series Add constant for 16 bits transparent voice | expand

Commit Message

Frédéric Danis Dec. 16, 2024, 6:46 p.m. UTC 
Add 16 bits, 2s complement, transparent air coding format for mSBC.
Corresponding commit implements functionality on kernel side.

The voice setting is used by sco_connect() or sco_conn_defer_accept()
after being set by sco_sock_setsockopt().

The PCM part of the voice setting is used for offload mode through PCM
chipset port.
This commits add support for mSBC 16 bits offloading, i.e. audio data
not transported over HCI.

The BCM4349B1 supports 16 bits transparent data on its I2S port.
If BT_VOICE_TRANSPARENT is used when accepting a SCO connection, this
gives only garbage audio while using BT_VOICE_TRANSPARENT_16BIT gives
correct audio.
This has been tested with connection to iPhone 14 and Samsung S24.
---
 lib/bluetooth.h | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/lib/bluetooth.h b/lib/bluetooth.h
index 073ed875d..32e58678b 100644
--- a/lib/bluetooth.h
+++ b/lib/bluetooth.h
@@ -111,6 +111,7 @@  struct bt_voice {
 
 #define BT_VOICE_TRANSPARENT			0x0003
 #define BT_VOICE_CVSD_16BIT			0x0060
+#define BT_VOICE_TRANSPARENT_16BIT		0x0063
 
 #define BT_PHY			14