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bluetooth: Modular API for A2DP codecs

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This patch introduce new modular API for bluetooth A2DP codecs. Its
benefits are:

* bluez5-util and module-bluez5-device does not contain any codec specific
  code, they are codec independent.

* For adding new A2DP codec it is needed just to adjust one table in
  a2dp-codec-util.c file. All codec specific functions are in separate
  codec file.

* Support for backchannel (microphone voice). Some A2DP codecs (like
  FastStream or aptX Low Latency) are bi-directional and can be used for
  both music playback and audio call.

* Support for more configurations per codec. This allows to implement low
  quality mode of some codec together with high quality.

Current SBC codec implementation was moved from bluez5-util and
module-bluez5-device to its own file and converted to this new A2DP API.
This commit is contained in:
Pali Rohár 2019-04-06 11:15:58 +02:00 • committed by Tanu Kaskinen
parent e8c4638f79
commit 106aa91477
8 changed files with 1127 additions and 622 deletions
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5
src/modules/bluetooth/bluez5-util.h
View file

@ -5,6 +5,7 @@
This file is part of PulseAudio.
Copyright 2008-2013 João Paulo Rechi Vita
Copyrigth 2018-2019 Pali Rohár <pali.rohar@gmail.com>
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
@ -22,6 +23,8 @@
#include <pulsecore/core.h>
#include "a2dp-codec-util.h"
#define PA_BLUETOOTH_UUID_A2DP_SOURCE "0000110a-0000-1000-8000-00805f9b34fb"
#define PA_BLUETOOTH_UUID_A2DP_SINK "0000110b-0000-1000-8000-00805f9b34fb"
@ -82,6 +85,8 @@ struct pa_bluetooth_transport {
uint8_t *config;
size_t config_size;
const pa_a2dp_codec *a2dp_codec;
uint16_t microphone_gain;
uint16_t speaker_gain;