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bluetooth: add wideband audio codec negotiation to HFP

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The HFP protocol supports the ability to negotiate codecs if that is
supported by both AG and HF.  This patch adds advertising of codec
negotiation support and the ability to negotiate a codec change.  The
only currently supported extra codec (as of HF 1.7.1) is mSBC.  mSBC
requires that the transmission be done over an eSCO link with
Transparent Data.  The linux kernel ensures the former, but we have to
manually set the socket to transparent data.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/507>
This commit is contained in:
James Bottomley 2021-02-17 09:44:35 +03:00 • committed by PulseAudio Marge Bot
parent f22cfa8f81
commit 4444ecad6f
3 changed files with 72 additions and 5 deletions
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2
src/modules/bluetooth/bluez5-util.h
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@ -89,6 +89,7 @@ typedef void (*pa_bluetooth_transport_release_cb)(pa_bluetooth_transport *t);
typedef void (*pa_bluetooth_transport_destroy_cb)(pa_bluetooth_transport *t);
typedef pa_volume_t (*pa_bluetooth_transport_set_volume_cb)(pa_bluetooth_transport *t, pa_volume_t volume);
typedef ssize_t (*pa_bluetooth_transport_write_cb)(pa_bluetooth_transport *t, int fd, const void* buffer, size_t size, size_t write_mtu);
typedef int (*pa_bluetooth_transport_setsockopt_cb)(pa_bluetooth_transport *t, int fd);
struct pa_bluetooth_transport {
pa_bluetooth_device *device;
@ -111,6 +112,7 @@ struct pa_bluetooth_transport {
pa_bluetooth_transport_acquire_cb acquire;
pa_bluetooth_transport_release_cb release;
pa_bluetooth_transport_write_cb write;
pa_bluetooth_transport_setsockopt_cb setsockopt;
pa_bluetooth_transport_destroy_cb destroy;
pa_bluetooth_transport_set_volume_cb set_sink_volume;
pa_bluetooth_transport_set_volume_cb set_source_volume;