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LeafOS / LeafOS-Project / android_packages_modules_Bluetooth / e081e052c56e9b16d4bbb06bd59e63d1c8d9def9 / . / system / bta / ag / bta_ag_sco.cc
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/******************************************************************************
*
* Copyright 2004-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains functions for managing the SCO connection used in AG.
*
******************************************************************************/
#include <android_bluetooth_flags.h>
#include <base/functional/bind.h>
#include <base/logging.h>
#include <bluetooth/log.h>
#include <cstdint>
#include "audio_hal_interface/hfp_client_interface.h"
#include "bta/ag/bta_ag_int.h"
#include "bta_ag_swb_aptx.h"
#include "common/init_flags.h"
#include "device/include/controller.h"
#include "internal_include/bt_target.h"
#include "internal_include/bt_trace.h"
#include "os/log.h"
#include "osi/include/osi.h" // UNUSED_ATTR
#include "stack/btm/btm_int_types.h"
#include "stack/btm/btm_sco.h"
#include "stack/btm/btm_sco_hfp_hal.h"
#include "stack/include/btm_api.h"
#include "stack/include/main_thread.h"
#include "types/raw_address.h"
extern tBTM_CB btm_cb;
using HfpInterface = bluetooth::audio::hfp::HfpClientInterface;
using namespace bluetooth;
/* Codec negotiation timeout */
#ifndef BTA_AG_CODEC_NEGOTIATION_TIMEOUT_MS
#define BTA_AG_CODEC_NEGOTIATION_TIMEOUT_MS (3 * 1000) /* 3 seconds */
#endif
#define BTM_VOICE_SETTING_CVSD \
((uint16_t)(HCI_INP_CODING_LINEAR | HCI_INP_DATA_FMT_2S_COMPLEMENT | \
HCI_INP_SAMPLE_SIZE_16BIT | HCI_AIR_CODING_FORMAT_CVSD))
#define BTM_VOICE_SETTING_TRANS \
((uint16_t)(HCI_INP_CODING_LINEAR | HCI_INP_DATA_FMT_2S_COMPLEMENT | \
HCI_INP_SAMPLE_SIZE_16BIT | HCI_AIR_CODING_FORMAT_TRANSPNT))
static bool sco_allowed = true;
static RawAddress active_device_addr = {};
static std::unique_ptr<HfpInterface> hfp_client_interface;
static std::unique_ptr<HfpInterface::Offload> hfp_offload_interface;
static std::unordered_map<int, ::hfp::sco_config> sco_config_map;
static std::unordered_map<tBTA_AG_PEER_CODEC, esco_coding_format_t>
codec_coding_format_map{
{UUID_CODEC_LC3, ESCO_CODING_FORMAT_LC3},
{UUID_CODEC_MSBC, ESCO_CODING_FORMAT_MSBC},
{UUID_CODEC_CVSD, ESCO_CODING_FORMAT_CVSD},
};
/* sco events */
enum {
BTA_AG_SCO_LISTEN_E, /* listen request */
BTA_AG_SCO_OPEN_E, /* open request */
BTA_AG_SCO_XFER_E, /* transfer request */
BTA_AG_SCO_CN_DONE_E, /* codec negotiation done */
BTA_AG_SCO_REOPEN_E, /* Retry with other codec when failed */
BTA_AG_SCO_CLOSE_E, /* close request */
BTA_AG_SCO_SHUTDOWN_E, /* shutdown request */
BTA_AG_SCO_CONN_OPEN_E, /* sco open */
BTA_AG_SCO_CONN_CLOSE_E, /* sco closed */
};
#define CASE_RETURN_STR(const) \
case const: \
return #const;
static const char* bta_ag_sco_evt_str(uint8_t event) {
switch (event) {
CASE_RETURN_STR(BTA_AG_SCO_LISTEN_E)
CASE_RETURN_STR(BTA_AG_SCO_OPEN_E)
CASE_RETURN_STR(BTA_AG_SCO_XFER_E)
CASE_RETURN_STR(BTA_AG_SCO_CN_DONE_E)
CASE_RETURN_STR(BTA_AG_SCO_REOPEN_E)
CASE_RETURN_STR(BTA_AG_SCO_CLOSE_E)
CASE_RETURN_STR(BTA_AG_SCO_SHUTDOWN_E)
CASE_RETURN_STR(BTA_AG_SCO_CONN_OPEN_E)
CASE_RETURN_STR(BTA_AG_SCO_CONN_CLOSE_E)
default:
return "Unknown SCO Event";
}
}
static const char* bta_ag_sco_state_str(uint8_t state) {
switch (state) {
CASE_RETURN_STR(BTA_AG_SCO_SHUTDOWN_ST)
CASE_RETURN_STR(BTA_AG_SCO_LISTEN_ST)
CASE_RETURN_STR(BTA_AG_SCO_CODEC_ST)
CASE_RETURN_STR(BTA_AG_SCO_OPENING_ST)
CASE_RETURN_STR(BTA_AG_SCO_OPEN_CL_ST)
CASE_RETURN_STR(BTA_AG_SCO_OPEN_XFER_ST)
CASE_RETURN_STR(BTA_AG_SCO_OPEN_ST)
CASE_RETURN_STR(BTA_AG_SCO_CLOSING_ST)
CASE_RETURN_STR(BTA_AG_SCO_CLOSE_OP_ST)
CASE_RETURN_STR(BTA_AG_SCO_CLOSE_XFER_ST)
CASE_RETURN_STR(BTA_AG_SCO_SHUTTING_ST)
default:
return "Unknown SCO State";
}
}
/**
* Check if bd_addr is the current active device.
*
* @param bd_addr target device address
* @return True if bd_addr is the current active device, False otherwise or if
* no active device is set (i.e. active_device_addr is empty)
*/
bool bta_ag_sco_is_active_device(const RawAddress& bd_addr) {
return !active_device_addr.IsEmpty() && active_device_addr == bd_addr;
}
void updateCodecParametersFromProviderInfo(tBTA_AG_PEER_CODEC esco_codec,
enh_esco_params_t& params);
/*******************************************************************************
*
* Function bta_ag_sco_conn_cback
*
* Description BTM SCO connection callback.
*
*
* Returns void
*
******************************************************************************/
static void bta_ag_sco_conn_cback(uint16_t sco_idx) {
uint16_t handle;
tBTA_AG_SCB* p_scb;
/* match callback to scb; first check current sco scb */
if (bta_ag_cb.sco.p_curr_scb != nullptr && bta_ag_cb.sco.p_curr_scb->in_use) {
handle = bta_ag_scb_to_idx(bta_ag_cb.sco.p_curr_scb);
}
/* then check for scb connected to this peer */
else {
/* Check if SLC is up */
handle = bta_ag_idx_by_bdaddr(BTM_ReadScoBdAddr(sco_idx));
p_scb = bta_ag_scb_by_idx(handle);
if (p_scb && !p_scb->svc_conn) handle = 0;
}
if (handle != 0) {
do_in_main_thread(
FROM_HERE, base::BindOnce(&bta_ag_sm_execute_by_handle, handle,
BTA_AG_SCO_OPEN_EVT, tBTA_AG_DATA::kEmpty));
} else {
/* no match found; disconnect sco, init sco variables */
bta_ag_cb.sco.p_curr_scb = nullptr;
bta_ag_cb.sco.state = BTA_AG_SCO_SHUTDOWN_ST;
BTM_RemoveSco(sco_idx);
}
}
/*******************************************************************************
*
* Function bta_ag_sco_disc_cback
*
* Description BTM SCO disconnection callback.
*
*
* Returns void
*
******************************************************************************/
static void bta_ag_sco_disc_cback(uint16_t sco_idx) {
uint16_t handle = 0;
log::debug("sco_idx: 0x{:x} sco.state:{}", sco_idx,
sco_state_text(static_cast<tSCO_STATE>(bta_ag_cb.sco.state)));
log::debug("scb[0] in_use:{} sco_idx: 0x{:x} sco state:{}",
logbool(bta_ag_cb.scb[0].in_use), bta_ag_cb.scb[0].sco_idx,
sco_state_text(static_cast<tSCO_STATE>(bta_ag_cb.scb[0].state)));
log::debug("scb[1] in_use:{} sco_idx:0x{:x} sco state:{}",
logbool(bta_ag_cb.scb[1].in_use), bta_ag_cb.scb[1].sco_idx,
sco_state_text(static_cast<tSCO_STATE>(bta_ag_cb.scb[1].state)));
/* match callback to scb */
if (bta_ag_cb.sco.p_curr_scb != nullptr && bta_ag_cb.sco.p_curr_scb->in_use) {
/* We only care about callbacks for the active SCO */
if (bta_ag_cb.sco.p_curr_scb->sco_idx != sco_idx) {
if (bta_ag_cb.sco.p_curr_scb->sco_idx != 0xFFFF) return;
}
handle = bta_ag_scb_to_idx(bta_ag_cb.sco.p_curr_scb);
}
if (handle != 0) {
const bool aptx_voice =
is_hfp_aptx_voice_enabled() &&
(bta_ag_cb.sco.p_curr_scb->is_aptx_swb_codec == true) &&
(bta_ag_cb.sco.p_curr_scb->inuse_codec ==
BTA_AG_SCO_APTX_SWB_SETTINGS_Q0);
log::verbose("aptx_voice={}, inuse_codec={:#x}", logbool(aptx_voice),
bta_ag_cb.sco.p_curr_scb->inuse_codec);
/* Restore settings */
if (bta_ag_cb.sco.p_curr_scb->inuse_codec == UUID_CODEC_MSBC ||
bta_ag_cb.sco.p_curr_scb->inuse_codec == UUID_CODEC_LC3 || aptx_voice) {
/* Bypass vendor specific and voice settings if enhanced eSCO supported */
if (!(controller_get_interface()
->supports_enhanced_setup_synchronous_connection())) {
BTM_WriteVoiceSettings(BTM_VOICE_SETTING_CVSD);
}
/* If SCO open was initiated by AG and failed for mSBC T2, try mSBC T1
* 'Safe setting' first. If T1 also fails, try CVSD
* same operations for LC3 settings */
if (bta_ag_sco_is_opening(bta_ag_cb.sco.p_curr_scb)) {
bta_ag_cb.sco.p_curr_scb->state = BTA_AG_SCO_CODEC_ST;
if (bta_ag_cb.sco.p_curr_scb->inuse_codec == UUID_CODEC_LC3) {
if (bta_ag_cb.sco.p_curr_scb->codec_lc3_settings ==
BTA_AG_SCO_LC3_SETTINGS_T2) {
log::warn(
"eSCO/SCO failed to open, falling back to LC3 T1 settings");
bta_ag_cb.sco.p_curr_scb->codec_lc3_settings =
BTA_AG_SCO_LC3_SETTINGS_T1;
} else {
log::warn("eSCO/SCO failed to open, falling back to CVSD settings");
bta_ag_cb.sco.p_curr_scb->inuse_codec = UUID_CODEC_CVSD;
bta_ag_cb.sco.p_curr_scb->codec_fallback = true;
}
} else {
if (bta_ag_cb.sco.p_curr_scb->codec_msbc_settings ==
BTA_AG_SCO_MSBC_SETTINGS_T2) {
log::warn(
"eSCO/SCO failed to open, falling back to mSBC T1 settings");
bta_ag_cb.sco.p_curr_scb->codec_msbc_settings =
BTA_AG_SCO_MSBC_SETTINGS_T1;
} else {
log::warn("eSCO/SCO failed to open, falling back to CVSD");
bta_ag_cb.sco.p_curr_scb->inuse_codec = UUID_CODEC_CVSD;
bta_ag_cb.sco.p_curr_scb->codec_fallback = true;
}
}
}
} else if (bta_ag_sco_is_opening(bta_ag_cb.sco.p_curr_scb)) {
if (IS_FLAG_ENABLED(retry_esco_with_zero_retransmission_effort) &&
bta_ag_cb.sco.p_curr_scb->retransmission_effort_retries == 0) {
bta_ag_cb.sco.p_curr_scb->retransmission_effort_retries++;
bta_ag_cb.sco.p_curr_scb->state = BTA_AG_SCO_CODEC_ST;
log::warn("eSCO/SCO failed to open, retry with retransmission_effort");
} else {
log::error("eSCO/SCO failed to open, no more fall back");
if (IS_FLAG_ENABLED(is_sco_managed_by_audio)) {
hfp_offload_interface->CancelStreamingRequest();
}
}
}
bta_ag_cb.sco.p_curr_scb->inuse_codec = BTM_SCO_CODEC_NONE;
do_in_main_thread(
FROM_HERE, base::BindOnce(&bta_ag_sm_execute_by_handle, handle,
BTA_AG_SCO_CLOSE_EVT, tBTA_AG_DATA::kEmpty));
} else {
/* no match found */
log::verbose("no scb for ag_sco_disc_cback");
/* sco could be closed after scb dealloc'ed */
if (bta_ag_cb.sco.p_curr_scb != nullptr) {
bta_ag_cb.sco.p_curr_scb->sco_idx = BTM_INVALID_SCO_INDEX;
bta_ag_cb.sco.p_curr_scb = nullptr;
bta_ag_cb.sco.state = BTA_AG_SCO_SHUTDOWN_ST;
}
}
}
/*******************************************************************************
*
* Function bta_ag_remove_sco
*
* Description Removes the specified SCO from the system.
* If only_active is true, then SCO is only removed if
* connected
*
* Returns bool - true if SCO removal was started
*
******************************************************************************/
static bool bta_ag_remove_sco(tBTA_AG_SCB* p_scb, bool only_active) {
if (p_scb->sco_idx != BTM_INVALID_SCO_INDEX) {
if (!only_active || p_scb->sco_idx == bta_ag_cb.sco.cur_idx) {
tBTM_STATUS status = BTM_RemoveSco(p_scb->sco_idx);
log::debug("Removed SCO index:0x{:04x} status:{}", p_scb->sco_idx,
btm_status_text(status));
if (status == BTM_CMD_STARTED) {
/* SCO is connected; set current control block */
bta_ag_cb.sco.p_curr_scb = p_scb;
return true;
} else if ((status == BTM_SUCCESS) || (status == BTM_UNKNOWN_ADDR)) {
/* If no connection reset the SCO handle */
p_scb->sco_idx = BTM_INVALID_SCO_INDEX;
}
}
}
return false;
}
/*******************************************************************************
*
* Function bta_ag_esco_connreq_cback
*
* Description BTM eSCO connection requests and eSCO change requests
* Only the connection requests are processed by BTA.
*
* Returns void
*
******************************************************************************/
static void bta_ag_esco_connreq_cback(tBTM_ESCO_EVT event,
tBTM_ESCO_EVT_DATA* p_data) {
/* Only process connection requests */
if (event == BTM_ESCO_CONN_REQ_EVT) {
uint16_t sco_inx = p_data->conn_evt.sco_inx;
const RawAddress* remote_bda = BTM_ReadScoBdAddr(sco_inx);
tBTA_AG_SCB* p_scb = bta_ag_scb_by_idx(bta_ag_idx_by_bdaddr(remote_bda));
if (remote_bda && bta_ag_sco_is_active_device(*remote_bda) && p_scb &&
p_scb->svc_conn) {
p_scb->sco_idx = sco_inx;
/* If no other SCO active, allow this one */
if (!bta_ag_cb.sco.p_curr_scb) {
log::verbose("Accept Conn Request (sco_inx 0x{:04x})", sco_inx);
bta_ag_sco_conn_rsp(p_scb, &p_data->conn_evt);
bta_ag_cb.sco.state = BTA_AG_SCO_OPENING_ST;
bta_ag_cb.sco.p_curr_scb = p_scb;
bta_ag_cb.sco.cur_idx = p_scb->sco_idx;
} else {
/* Begin a transfer: Close current SCO before responding */
log::verbose("bta_ag_esco_connreq_cback: Begin XFER");
bta_ag_cb.sco.p_xfer_scb = p_scb;
bta_ag_cb.sco.conn_data = p_data->conn_evt;
bta_ag_cb.sco.state = BTA_AG_SCO_OPEN_XFER_ST;
if (!bta_ag_remove_sco(bta_ag_cb.sco.p_curr_scb, true)) {
log::error(
"Nothing to remove,so accept Conn Request(sco_inx 0x{:04x})",
sco_inx);
bta_ag_cb.sco.p_xfer_scb = nullptr;
bta_ag_cb.sco.state = BTA_AG_SCO_LISTEN_ST;
bta_ag_sco_conn_rsp(p_scb, &p_data->conn_evt);
}
}
} else {
log::warn(
"reject incoming SCO connection, remote_bda={}, active_bda={}, "
"current_bda={}",
ADDRESS_TO_LOGGABLE_STR(remote_bda ? *remote_bda
: RawAddress::kEmpty),
ADDRESS_TO_LOGGABLE_STR(active_device_addr),
ADDRESS_TO_LOGGABLE_STR(p_scb ? p_scb->peer_addr
: RawAddress::kEmpty));
BTM_EScoConnRsp(p_data->conn_evt.sco_inx, HCI_ERR_HOST_REJECT_RESOURCES,
(enh_esco_params_t*)nullptr);
}
}
}
/*******************************************************************************
*
* Function bta_ag_cback_sco
*
* Description Call application callback function with SCO event.
*
*
* Returns void
*
******************************************************************************/
static void bta_ag_cback_sco(tBTA_AG_SCB* p_scb, tBTA_AG_EVT event) {
tBTA_AG_HDR sco = {};
sco.handle = bta_ag_scb_to_idx(p_scb);
sco.app_id = p_scb->app_id;
/* call close cback */
(*bta_ag_cb.p_cback)(static_cast<tBTA_AG_EVT>(event), (tBTA_AG*)&sco);
}
/*******************************************************************************
*
* Function bta_ag_create_sco
*
* Description Create a SCO connection for a given control block
* p_scb : Pointer to the target AG control block
* is_orig : Whether to initiate or listen for SCO connection
*
* Returns void
*
******************************************************************************/
void bta_ag_create_sco(tBTA_AG_SCB* p_scb, bool is_orig) {
log::debug("BEFORE {}", p_scb->ToString());
tBTA_AG_PEER_CODEC esco_codec = UUID_CODEC_CVSD;
if (!bta_ag_sco_is_active_device(p_scb->peer_addr)) {
log::warn("device {} is not active, active_device={}",
ADDRESS_TO_LOGGABLE_STR(p_scb->peer_addr),
ADDRESS_TO_LOGGABLE_STR(active_device_addr));
if (bta_ag_cb.sco.p_curr_scb != nullptr &&
bta_ag_cb.sco.p_curr_scb->in_use && p_scb == bta_ag_cb.sco.p_curr_scb) {
do_in_main_thread(FROM_HERE, base::BindOnce(&bta_ag_sm_execute, p_scb,
BTA_AG_SCO_CLOSE_EVT,
tBTA_AG_DATA::kEmpty));
}
return;
}
/* Make sure this SCO handle is not already in use */
if (p_scb->sco_idx != BTM_INVALID_SCO_INDEX) {
log::error("device {}, index 0x{:04x} already in use!",
ADDRESS_TO_LOGGABLE_CSTR(p_scb->peer_addr), p_scb->sco_idx);
return;
}
#if (DISABLE_WBS == FALSE)
if ((p_scb->sco_codec == BTM_SCO_CODEC_MSBC) && !p_scb->codec_fallback &&
hfp_hal_interface::get_wbs_supported()) {
esco_codec = UUID_CODEC_MSBC;
}
#endif
if (is_hfp_aptx_voice_enabled()) {
if ((p_scb->sco_codec == BTA_AG_SCO_APTX_SWB_SETTINGS_Q0) &&
!p_scb->codec_fallback) {
esco_codec = BTA_AG_SCO_APTX_SWB_SETTINGS_Q0;
}
}
if ((p_scb->sco_codec == BTM_SCO_CODEC_LC3) && !p_scb->codec_fallback &&
hfp_hal_interface::get_swb_supported()) {
esco_codec = UUID_CODEC_LC3;
}
if (p_scb->codec_fallback) {
p_scb->codec_fallback = false;
/* Force AG to send +BCS for the next audio connection. */
p_scb->codec_updated = true;
/* Reset mSBC settings to T2 for the next audio connection */
p_scb->codec_msbc_settings = BTA_AG_SCO_MSBC_SETTINGS_T2;
/* Reset LC3 settings to T2 for the next audio connection */
p_scb->codec_lc3_settings = BTA_AG_SCO_LC3_SETTINGS_T2;
/* Reset SWB settings to Q3 for the next audio connection */
p_scb->codec_aptx_settings = BTA_AG_SCO_APTX_SWB_SETTINGS_Q0;
}
bool offload = hfp_hal_interface::get_offload_enabled();
/* Initialize eSCO parameters */
enh_esco_params_t params = {};
/* If SWB/WBS are excluded, use CVSD by default,
* index is 0 for CVSD by initialization.
* If eSCO codec is mSBC, index is T2 or T1.
* If eSCO coedc is LC3, index is T2 or T1. */
log::warn("esco_codec: {}", (int)esco_codec);
if (esco_codec == UUID_CODEC_LC3) {
if (p_scb->codec_lc3_settings == BTA_AG_SCO_LC3_SETTINGS_T2) {
params = esco_parameters_for_codec(ESCO_CODEC_LC3_T2, offload);
} else {
params = esco_parameters_for_codec(ESCO_CODEC_LC3_T1, offload);
}
} else if (esco_codec == UUID_CODEC_MSBC) {
if (p_scb->codec_msbc_settings == BTA_AG_SCO_MSBC_SETTINGS_T2) {
params = esco_parameters_for_codec(ESCO_CODEC_MSBC_T2, offload);
} else {
params = esco_parameters_for_codec(ESCO_CODEC_MSBC_T1, offload);
}
} else if (is_hfp_aptx_voice_enabled() &&
(p_scb->is_aptx_swb_codec == true && !p_scb->codec_updated)) {
if (p_scb->codec_aptx_settings == BTA_AG_SCO_APTX_SWB_SETTINGS_Q3) {
params = esco_parameters_for_codec(ESCO_CODEC_SWB_Q3, true);
} else if (p_scb->codec_aptx_settings == BTA_AG_SCO_APTX_SWB_SETTINGS_Q2) {
params = esco_parameters_for_codec(ESCO_CODEC_SWB_Q2, true);
} else if (p_scb->codec_aptx_settings == BTA_AG_SCO_APTX_SWB_SETTINGS_Q1) {
params = esco_parameters_for_codec(ESCO_CODEC_SWB_Q1, true);
} else if (p_scb->codec_aptx_settings == BTA_AG_SCO_APTX_SWB_SETTINGS_Q0) {
params = esco_parameters_for_codec(ESCO_CODEC_SWB_Q0, true);
}
} else {
if ((p_scb->features & BTA_AG_FEAT_ESCO_S4) &&
(p_scb->peer_features & BTA_AG_PEER_FEAT_ESCO_S4)) {
// HFP >=1.7 eSCO
params = esco_parameters_for_codec(ESCO_CODEC_CVSD_S4, offload);
} else {
// HFP <=1.6 eSCO
params = esco_parameters_for_codec(ESCO_CODEC_CVSD_S3, offload);
}
}
updateCodecParametersFromProviderInfo(esco_codec, params);
if (IS_FLAG_ENABLED(retry_esco_with_zero_retransmission_effort) &&
p_scb->retransmission_effort_retries == 1) {
log::info("change retransmission_effort to 0, retry");
p_scb->retransmission_effort_retries++;
params.retransmission_effort = ESCO_RETRANSMISSION_OFF;
}
/* Configure input/output data path based on HAL settings. */
hfp_hal_interface::set_codec_datapath(esco_codec);
hfp_hal_interface::update_esco_parameters(&params);
/* If initiating, setup parameters to start SCO/eSCO connection */
if (is_orig) {
bta_ag_cb.sco.is_local = true;
/* Set eSCO Mode */
BTM_SetEScoMode(&params);
bta_ag_cb.sco.p_curr_scb = p_scb;
/* save the current codec as sco_codec can be updated while SCO is open. */
p_scb->inuse_codec = esco_codec;
/* tell sys to stop av if any */
bta_sys_sco_use(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
/* Send pending commands to create SCO connection to peer */
bta_ag_create_pending_sco(p_scb, bta_ag_cb.sco.is_local);
log::debug("Initiating AG SCO inx 0x{:04x}, pkt types 0x{:04x}",
p_scb->sco_idx, params.packet_types);
} else {
/* Not initiating, go to listen mode */
tBTM_STATUS btm_status = BTM_CreateSco(
&p_scb->peer_addr, false, params.packet_types, &p_scb->sco_idx,
bta_ag_sco_conn_cback, bta_ag_sco_disc_cback);
if (btm_status == BTM_CMD_STARTED) {
BTM_RegForEScoEvts(p_scb->sco_idx, bta_ag_esco_connreq_cback);
}
log::debug("Listening AG SCO inx 0x{:04x} status:{} pkt types 0x{:04x}",
p_scb->sco_idx, btm_status_text(btm_status),
params.packet_types);
}
log::debug("AFTER {}", p_scb->ToString());
}
void updateCodecParametersFromProviderInfo(tBTA_AG_PEER_CODEC esco_codec,
enh_esco_params_t& params) {
if (IS_FLAG_ENABLED(is_sco_managed_by_audio) && !sco_config_map.empty()) {
auto sco_config_it = sco_config_map.find(esco_codec);
if (sco_config_it == sco_config_map.end()) {
log::error("cannot find sco config for esco_codec index={}", esco_codec);
return;
}
log::debug("use ProviderInfo to update (e)sco parameters");
params.input_data_path = sco_config_it->second.inputDataPath;
params.output_data_path = sco_config_it->second.outputDataPath;
if (!sco_config_it->second.useControllerCodec) {
log::debug("use DSP Codec instead of controller codec");
esco_coding_format_t codingFormat = codec_coding_format_map[esco_codec];
params.input_coding_format.coding_format = codingFormat;
params.output_coding_format.coding_format = codingFormat;
params.input_bandwidth = TXRX_64KBITS_RATE;
params.output_bandwidth = TXRX_64KBITS_RATE;
}
}
}
/*******************************************************************************
*
* Function bta_ag_create_pending_sco
*
* Description This Function is called after the pre-SCO vendor setup is
* done for the BTA to continue and send the HCI Commands for
* creating/accepting SCO connection with peer based on the
* is_local parameter.
*
* Returns void
*
******************************************************************************/
void bta_ag_create_pending_sco(tBTA_AG_SCB* p_scb, bool is_local) {
tBTA_AG_PEER_CODEC esco_codec = p_scb->inuse_codec;
enh_esco_params_t params = {};
bool offload = hfp_hal_interface::get_offload_enabled();
bta_ag_cb.sco.p_curr_scb = p_scb;
bta_ag_cb.sco.cur_idx = p_scb->sco_idx;
/* Local device requested SCO connection to peer */
if (is_local) {
if (esco_codec == UUID_CODEC_LC3) {
if (p_scb->codec_lc3_settings == BTA_AG_SCO_LC3_SETTINGS_T2) {
params = esco_parameters_for_codec(ESCO_CODEC_LC3_T2, offload);
} else {
params = esco_parameters_for_codec(ESCO_CODEC_LC3_T1, offload);
}
} else if (is_hfp_aptx_voice_enabled() &&
(p_scb->is_aptx_swb_codec == true && !p_scb->codec_updated)) {
if (p_scb->codec_aptx_settings == BTA_AG_SCO_APTX_SWB_SETTINGS_Q3) {
params = esco_parameters_for_codec(ESCO_CODEC_SWB_Q3, true);
} else if (p_scb->codec_aptx_settings ==
BTA_AG_SCO_APTX_SWB_SETTINGS_Q2) {
params = esco_parameters_for_codec(ESCO_CODEC_SWB_Q2, true);
} else if (p_scb->codec_aptx_settings ==
BTA_AG_SCO_APTX_SWB_SETTINGS_Q1) {
params = esco_parameters_for_codec(ESCO_CODEC_SWB_Q1, true);
} else if (p_scb->codec_aptx_settings ==
BTA_AG_SCO_APTX_SWB_SETTINGS_Q0) {
params = esco_parameters_for_codec(ESCO_CODEC_SWB_Q0, true);
}
} else if (esco_codec == UUID_CODEC_MSBC) {
if (p_scb->codec_msbc_settings == BTA_AG_SCO_MSBC_SETTINGS_T2) {
params = esco_parameters_for_codec(ESCO_CODEC_MSBC_T2, offload);
} else {
params = esco_parameters_for_codec(ESCO_CODEC_MSBC_T1, offload);
}
} else {
if ((p_scb->features & BTA_AG_FEAT_ESCO_S4) &&
(p_scb->peer_features & BTA_AG_PEER_FEAT_ESCO_S4)) {
// HFP >=1.7 eSCO
params = esco_parameters_for_codec(ESCO_CODEC_CVSD_S4, offload);
} else {
// HFP <=1.6 eSCO
params = esco_parameters_for_codec(ESCO_CODEC_CVSD_S3, offload);
}
}
/* Bypass voice settings if enhanced SCO setup command is supported */
if (!(controller_get_interface()
->supports_enhanced_setup_synchronous_connection())) {
if (esco_codec == UUID_CODEC_MSBC || esco_codec == UUID_CODEC_LC3) {
BTM_WriteVoiceSettings(BTM_VOICE_SETTING_TRANS);
} else {
BTM_WriteVoiceSettings(BTM_VOICE_SETTING_CVSD);
}
}
if (BTM_CreateSco(&p_scb->peer_addr, true, params.packet_types,
&p_scb->sco_idx, bta_ag_sco_conn_cback,
bta_ag_sco_disc_cback) == BTM_CMD_STARTED) {
/* Initiating the connection, set the current sco handle */
bta_ag_cb.sco.cur_idx = p_scb->sco_idx;
/* Configure input/output data. */
hfp_hal_interface::set_codec_datapath(esco_codec);
}
log::verbose("initiated SCO connection");
} else {
// Local device accepted SCO connection from peer(HF)
// Because HF devices usually do not send AT+BAC and +BCS command,
// and there is no plan to implement corresponding command handlers,
// so we only accept CVSD connection from HF no matter what's
// requested.
if ((p_scb->features & BTA_AG_FEAT_ESCO_S4) &&
(p_scb->peer_features & BTA_AG_PEER_FEAT_ESCO_S4)) {
// HFP >=1.7 eSCO
params = esco_parameters_for_codec(ESCO_CODEC_CVSD_S4, offload);
} else {
// HFP <=1.6 eSCO
params = esco_parameters_for_codec(ESCO_CODEC_CVSD_S3, offload);
}
// HFP v1.8 5.7.3 CVSD coding
tSCO_CONN* p_sco = NULL;
if (p_scb->sco_idx < BTM_MAX_SCO_LINKS)
p_sco = &btm_cb.sco_cb.sco_db[p_scb->sco_idx];
if (p_sco && (p_sco->esco.data.link_type == BTM_LINK_TYPE_SCO ||
!btm_peer_supports_esco_ev3(p_sco->esco.data.bd_addr))) {
params = esco_parameters_for_codec(SCO_CODEC_CVSD_D1, offload);
}
BTM_EScoConnRsp(p_scb->sco_idx, HCI_SUCCESS, &params);
log::verbose("listening for SCO connection");
}
}
/*******************************************************************************
*
* Function bta_ag_codec_negotiation_timer_cback
*
* Description
*
*
* Returns void
*
******************************************************************************/
static void bta_ag_codec_negotiation_timer_cback(void* data) {
log::warn("Codec negotiation timeout");
tBTA_AG_SCB* p_scb = (tBTA_AG_SCB*)data;
/* Announce that codec negotiation failed. */
bta_ag_sco_codec_nego(p_scb, false);
/* call app callback */
bta_ag_cback_sco(p_scb, BTA_AG_AUDIO_CLOSE_EVT);
}
/*******************************************************************************
*
* Function bta_ag_codec_negotiate
*
* Description Initiate codec negotiation by sending AT command.
* If not necessary, skip negotiation.
*
* Returns void
*
******************************************************************************/
void bta_ag_codec_negotiate(tBTA_AG_SCB* p_scb) {
bta_ag_cb.sco.p_curr_scb = p_scb;
uint8_t* p_rem_feat = BTM_ReadRemoteFeatures(p_scb->peer_addr);
bool sdp_wbs_support = p_scb->peer_sdp_features & BTA_AG_FEAT_WBS_SUPPORT;
if (p_rem_feat == nullptr) {
log::warn("Skip codec negotiation, failed to read remote features");
bta_ag_sco_codec_nego(p_scb, false);
return;
}
// Workaround for misbehaving HFs, which indicate which one is not support on
// Transparent Synchronous Data in Remote Supported Features, WBS in SDP and
// and Codec Negotiation in BRSF. Fluoride will assume CVSD codec by default.
// In Sony XAV AX100 car kit and Sony MW600 Headset case, which indicate
// Transparent Synchronous Data and WBS support, but no codec negotiation
// support, using mSBC codec can result background noise or no audio.
// In Skullcandy JIB case, which indicate WBS and codec negotiation support,
// but no Transparent Synchronous Data support, using mSBC codec can result
// SCO setup fail by Firmware reject.
if (!HCI_LMP_TRANSPNT_SUPPORTED(p_rem_feat) || !sdp_wbs_support ||
!(p_scb->peer_features & BTA_AG_PEER_FEAT_CODEC)) {
log::info("Assume CVSD by default due to mask mismatch");
p_scb->sco_codec = UUID_CODEC_CVSD;
}
const bool aptx_voice =
is_hfp_aptx_voice_enabled() && p_scb->is_aptx_swb_codec &&
(p_scb->peer_codecs & BTA_AG_SCO_APTX_SWB_SETTINGS_Q0_MASK);
log::verbose(
"aptx_voice={}, is_aptx_swb_codec={}, Q0 codec supported={}",
logbool(aptx_voice), logbool(p_scb->is_aptx_swb_codec),
logbool(p_scb->peer_codecs & BTA_AG_SCO_APTX_SWB_SETTINGS_Q0_MASK));
if (((p_scb->codec_updated || p_scb->codec_fallback) &&
(p_scb->features & BTA_AG_FEAT_CODEC) &&
(p_scb->peer_features & BTA_AG_PEER_FEAT_CODEC)) ||
(aptx_voice)) {
log::info("Starting codec negotiation");
/* Change the power mode to Active until SCO open is completed. */
bta_sys_busy(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
if (p_scb->peer_codecs & BTA_AG_SCO_APTX_SWB_SETTINGS_Q0_MASK) {
if (p_scb->is_aptx_swb_codec == false) {
p_scb->sco_codec = BTA_AG_SCO_APTX_SWB_SETTINGS_Q0;
p_scb->is_aptx_swb_codec = true;
}
log::verbose("Sending +QCS, sco_codec={}, is_aptx_swb_codec={}",
p_scb->sco_codec, logbool(p_scb->is_aptx_swb_codec));
/* Send +QCS to the peer */
bta_ag_send_qcs(p_scb, NULL);
} else {
if (aptx_voice) {
p_scb->sco_codec = BTM_SCO_CODEC_MSBC;
p_scb->is_aptx_swb_codec = false;
}
log::verbose("Sending +BCS, sco_codec={}, is_aptx_swb_codec={}",
p_scb->sco_codec, logbool(p_scb->is_aptx_swb_codec));
/* Send +BCS to the peer */
bta_ag_send_bcs(p_scb);
}
/* Start timer to handle timeout */
alarm_set_on_mloop(p_scb->codec_negotiation_timer,
BTA_AG_CODEC_NEGOTIATION_TIMEOUT_MS,
bta_ag_codec_negotiation_timer_cback, p_scb);
} else {
/* use same codec type as previous SCO connection, skip codec negotiation */
log::info("Skip codec negotiation, using the same codec");
bta_ag_sco_codec_nego(p_scb, true);
}
}
static void bta_ag_sco_event(tBTA_AG_SCB* p_scb, uint8_t event) {
tBTA_AG_SCO_CB* p_sco = &bta_ag_cb.sco;
uint8_t previous_state = p_sco->state;
log::info("device:{} index:0x{:04x} state:{}[{}] event:{}[{}]",
ADDRESS_TO_LOGGABLE_CSTR(p_scb->peer_addr), p_scb->sco_idx,
bta_ag_sco_state_str(p_sco->state), p_sco->state,
bta_ag_sco_evt_str(event), event);
switch (p_sco->state) {
case BTA_AG_SCO_SHUTDOWN_ST:
switch (event) {
case BTA_AG_SCO_LISTEN_E:
/* create sco listen connection */
bta_ag_create_sco(p_scb, false);
p_sco->state = BTA_AG_SCO_LISTEN_ST;
break;
default:
log::warn("BTA_AG_SCO_SHUTDOWN_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
}
break;
case BTA_AG_SCO_LISTEN_ST:
switch (event) {
case BTA_AG_SCO_LISTEN_E:
/* create sco listen connection (Additional channel) */
bta_ag_create_sco(p_scb, false);
break;
case BTA_AG_SCO_OPEN_E:
/* remove listening connection */
bta_ag_remove_sco(p_scb, false);
#if (DISABLE_WBS == FALSE)
/* start codec negotiation */
p_sco->state = BTA_AG_SCO_CODEC_ST;
bta_ag_codec_negotiate(p_scb);
#else
bta_ag_create_sco(p_scb, true);
p_sco->state = BTA_AG_SCO_OPENING_ST;
#endif
break;
case BTA_AG_SCO_SHUTDOWN_E:
/* remove listening connection */
bta_ag_remove_sco(p_scb, false);
if (p_scb == p_sco->p_curr_scb) p_sco->p_curr_scb = nullptr;
/* If last SCO instance then finish shutting down */
if (!bta_ag_other_scb_open(p_scb)) {
p_sco->state = BTA_AG_SCO_SHUTDOWN_ST;
}
break;
case BTA_AG_SCO_CLOSE_E:
/* remove listening connection */
/* Ignore the event. Keep listening SCO for the active SLC */
log::warn("BTA_AG_SCO_LISTEN_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
case BTA_AG_SCO_CONN_CLOSE_E:
/* sco failed; create sco listen connection */
bta_ag_create_sco(p_scb, false);
p_sco->state = BTA_AG_SCO_LISTEN_ST;
break;
default:
log::warn("BTA_AG_SCO_LISTEN_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
}
break;
case BTA_AG_SCO_CODEC_ST:
switch (event) {
case BTA_AG_SCO_LISTEN_E:
/* create sco listen connection (Additional channel) */
bta_ag_create_sco(p_scb, false);
break;
case BTA_AG_SCO_CN_DONE_E:
/* create sco connection to peer */
bta_ag_create_sco(p_scb, true);
p_sco->state = BTA_AG_SCO_OPENING_ST;
break;
case BTA_AG_SCO_XFER_E:
/* save xfer scb */
p_sco->p_xfer_scb = p_scb;
p_sco->state = BTA_AG_SCO_CLOSE_XFER_ST;
break;
case BTA_AG_SCO_SHUTDOWN_E:
/* remove listening connection */
bta_ag_remove_sco(p_scb, false);
if (p_scb == p_sco->p_curr_scb) p_sco->p_curr_scb = nullptr;
/* If last SCO instance then finish shutting down */
if (!bta_ag_other_scb_open(p_scb)) {
p_sco->state = BTA_AG_SCO_SHUTDOWN_ST;
}
break;
case BTA_AG_SCO_CLOSE_E:
if (bluetooth::common::init_flags::
sco_codec_timeout_clear_is_enabled()) {
/* remove listening connection */
bta_ag_remove_sco(p_scb, false);
if (p_scb == p_sco->p_curr_scb) p_sco->p_curr_scb = nullptr;
bta_ag_create_sco(p_scb, false);
}
/* sco open is not started yet. just go back to listening */
p_sco->state = BTA_AG_SCO_LISTEN_ST;
break;
case BTA_AG_SCO_CONN_CLOSE_E:
/* sco failed; create sco listen connection */
bta_ag_create_sco(p_scb, false);
p_sco->state = BTA_AG_SCO_LISTEN_ST;
break;
default:
log::warn("BTA_AG_SCO_CODEC_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
}
break;
case BTA_AG_SCO_OPENING_ST:
switch (event) {
case BTA_AG_SCO_LISTEN_E:
/* second headset has now joined */
/* create sco listen connection (Additional channel) */
if (p_scb != p_sco->p_curr_scb) {
bta_ag_create_sco(p_scb, false);
}
break;
#if (DISABLE_WBS == FALSE)
case BTA_AG_SCO_REOPEN_E:
/* start codec negotiation */
p_sco->state = BTA_AG_SCO_CODEC_ST;
bta_ag_codec_negotiate(p_scb);
break;
#endif
case BTA_AG_SCO_XFER_E:
/* save xfer scb */
p_sco->p_xfer_scb = p_scb;
p_sco->state = BTA_AG_SCO_CLOSE_XFER_ST;
break;
case BTA_AG_SCO_CLOSE_E:
p_sco->state = BTA_AG_SCO_OPEN_CL_ST;
break;
case BTA_AG_SCO_SHUTDOWN_E:
/* If not opening scb, just close it */
if (p_scb != p_sco->p_curr_scb) {
/* remove listening connection */
bta_ag_remove_sco(p_scb, false);
} else
p_sco->state = BTA_AG_SCO_SHUTTING_ST;
break;
case BTA_AG_SCO_CONN_OPEN_E:
p_sco->state = BTA_AG_SCO_OPEN_ST;
break;
case BTA_AG_SCO_CONN_CLOSE_E:
/* sco failed; create sco listen connection */
bta_ag_create_sco(p_scb, false);
p_sco->state = BTA_AG_SCO_LISTEN_ST;
break;
default:
log::warn("BTA_AG_SCO_OPENING_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
}
break;
case BTA_AG_SCO_OPEN_CL_ST:
switch (event) {
case BTA_AG_SCO_XFER_E:
/* save xfer scb */
p_sco->p_xfer_scb = p_scb;
p_sco->state = BTA_AG_SCO_CLOSE_XFER_ST;
break;
case BTA_AG_SCO_OPEN_E:
p_sco->state = BTA_AG_SCO_OPENING_ST;
break;
case BTA_AG_SCO_SHUTDOWN_E:
/* If not opening scb, just close it */
if (p_scb != p_sco->p_curr_scb) {
/* remove listening connection */
bta_ag_remove_sco(p_scb, false);
} else
p_sco->state = BTA_AG_SCO_SHUTTING_ST;
break;
case BTA_AG_SCO_CONN_OPEN_E:
/* close sco connection */
bta_ag_remove_sco(p_scb, true);
p_sco->state = BTA_AG_SCO_CLOSING_ST;
break;
case BTA_AG_SCO_CONN_CLOSE_E:
/* sco failed; create sco listen connection */
p_sco->state = BTA_AG_SCO_LISTEN_ST;
break;
default:
log::warn("BTA_AG_SCO_OPEN_CL_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
}
break;
case BTA_AG_SCO_OPEN_XFER_ST:
switch (event) {
case BTA_AG_SCO_CLOSE_E:
/* close sco connection */
bta_ag_remove_sco(p_scb, true);
p_sco->state = BTA_AG_SCO_CLOSING_ST;
break;
case BTA_AG_SCO_SHUTDOWN_E:
/* remove all connection */
bta_ag_remove_sco(p_scb, false);
p_sco->state = BTA_AG_SCO_SHUTTING_ST;
break;
case BTA_AG_SCO_CONN_CLOSE_E:
/* closed sco; place in listen mode and
accept the transferred connection */
bta_ag_create_sco(p_scb, false); /* Back into listen mode */
/* Accept sco connection with xfer scb */
bta_ag_sco_conn_rsp(p_sco->p_xfer_scb, &p_sco->conn_data);
p_sco->state = BTA_AG_SCO_OPENING_ST;
p_sco->p_curr_scb = p_sco->p_xfer_scb;
p_sco->cur_idx = p_sco->p_xfer_scb->sco_idx;
p_sco->p_xfer_scb = nullptr;
break;
default:
log::warn("BTA_AG_SCO_OPEN_XFER_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
}
break;
case BTA_AG_SCO_OPEN_ST:
switch (event) {
case BTA_AG_SCO_LISTEN_E:
/* second headset has now joined */
/* create sco listen connection (Additional channel) */
if (p_scb != p_sco->p_curr_scb) {
bta_ag_create_sco(p_scb, false);
}
break;
case BTA_AG_SCO_XFER_E:
/* close current sco connection */
bta_ag_remove_sco(p_sco->p_curr_scb, true);
/* save xfer scb */
p_sco->p_xfer_scb = p_scb;
p_sco->state = BTA_AG_SCO_CLOSE_XFER_ST;
break;
case BTA_AG_SCO_CLOSE_E:
/* close sco connection if active */
if (bta_ag_remove_sco(p_scb, true)) {
p_sco->state = BTA_AG_SCO_CLOSING_ST;
}
break;
case BTA_AG_SCO_SHUTDOWN_E:
/* remove all listening connections */
bta_ag_remove_sco(p_scb, false);
/* If SCO was active on this scb, close it */
if (p_scb == p_sco->p_curr_scb) {
p_sco->state = BTA_AG_SCO_SHUTTING_ST;
}
break;
case BTA_AG_SCO_CONN_CLOSE_E:
/* peer closed sco; create sco listen connection */
bta_ag_create_sco(p_scb, false);
p_sco->state = BTA_AG_SCO_LISTEN_ST;
break;
default:
log::warn("BTA_AG_SCO_OPEN_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
}
break;
case BTA_AG_SCO_CLOSING_ST:
switch (event) {
case BTA_AG_SCO_LISTEN_E:
/* create sco listen connection (Additional channel) */
if (p_scb != p_sco->p_curr_scb) {
bta_ag_create_sco(p_scb, false);
}
break;
case BTA_AG_SCO_OPEN_E:
p_sco->state = BTA_AG_SCO_CLOSE_OP_ST;
break;
case BTA_AG_SCO_XFER_E:
/* save xfer scb */
p_sco->p_xfer_scb = p_scb;
p_sco->state = BTA_AG_SCO_CLOSE_XFER_ST;
break;
case BTA_AG_SCO_SHUTDOWN_E:
/* If not closing scb, just close it */
if (p_scb != p_sco->p_curr_scb) {
/* remove listening connection */
bta_ag_remove_sco(p_scb, false);
} else
p_sco->state = BTA_AG_SCO_SHUTTING_ST;
break;
case BTA_AG_SCO_CONN_CLOSE_E:
/* peer closed sco; create sco listen connection */
bta_ag_create_sco(p_scb, false);
p_sco->state = BTA_AG_SCO_LISTEN_ST;
break;
default:
log::warn("BTA_AG_SCO_CLOSING_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
}
break;
case BTA_AG_SCO_CLOSE_OP_ST:
switch (event) {
case BTA_AG_SCO_CLOSE_E:
p_sco->state = BTA_AG_SCO_CLOSING_ST;
break;
case BTA_AG_SCO_SHUTDOWN_E:
p_sco->state = BTA_AG_SCO_SHUTTING_ST;
break;
case BTA_AG_SCO_CONN_CLOSE_E:
/* start codec negotiation */
p_sco->state = BTA_AG_SCO_CODEC_ST;
bta_ag_codec_negotiate(p_scb);
break;
case BTA_AG_SCO_LISTEN_E:
/* create sco listen connection (Additional channel) */
if (p_scb != p_sco->p_curr_scb) {
bta_ag_create_sco(p_scb, false);
}
break;
default:
log::warn("BTA_AG_SCO_CLOSE_OP_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
}
break;
case BTA_AG_SCO_CLOSE_XFER_ST:
switch (event) {
case BTA_AG_SCO_CONN_OPEN_E:
/* close sco connection so headset can be transferred
Probably entered this state from "opening state" */
bta_ag_remove_sco(p_scb, true);
break;
case BTA_AG_SCO_CLOSE_E:
/* clear xfer scb */
p_sco->p_xfer_scb = nullptr;
p_sco->state = BTA_AG_SCO_CLOSING_ST;
break;
case BTA_AG_SCO_SHUTDOWN_E:
/* clear xfer scb */
p_sco->p_xfer_scb = nullptr;
p_sco->state = BTA_AG_SCO_SHUTTING_ST;
break;
case BTA_AG_SCO_CN_DONE_E:
case BTA_AG_SCO_CONN_CLOSE_E: {
/* closed sco; place old sco in listen mode,
take current sco out of listen, and
create originating sco for current */
bta_ag_create_sco(p_scb, false);
bta_ag_remove_sco(p_sco->p_xfer_scb, false);
#if (DISABLE_WBS == FALSE)
/* start codec negotiation */
p_sco->state = BTA_AG_SCO_CODEC_ST;
tBTA_AG_SCB* p_cn_scb = p_sco->p_xfer_scb;
p_sco->p_xfer_scb = nullptr;
bta_ag_codec_negotiate(p_cn_scb);
#else
/* create sco connection to peer */
bta_ag_create_sco(p_sco->p_xfer_scb, true);
p_sco->p_xfer_scb = nullptr;
p_sco->state = BTA_AG_SCO_OPENING_ST;
#endif
break;
}
default:
log::warn("BTA_AG_SCO_CLOSE_XFER_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
}
break;
case BTA_AG_SCO_SHUTTING_ST:
switch (event) {
case BTA_AG_SCO_CONN_OPEN_E:
/* close sco connection; wait for conn close event */
bta_ag_remove_sco(p_scb, true);
break;
case BTA_AG_SCO_CONN_CLOSE_E:
/* If last SCO instance then finish shutting down */
if (!bta_ag_other_scb_open(p_scb)) {
p_sco->state = BTA_AG_SCO_SHUTDOWN_ST;
bta_sys_sco_unuse(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
} else /* Other instance is still listening */
{
p_sco->state = BTA_AG_SCO_LISTEN_ST;
}
/* If SCO closed for other HS which is not being disconnected,
then create listen sco connection for it as scb still open */
if (bta_ag_scb_open(p_scb)) {
bta_ag_create_sco(p_scb, false);
p_sco->state = BTA_AG_SCO_LISTEN_ST;
}
if (p_scb == p_sco->p_curr_scb) {
p_sco->p_curr_scb->sco_idx = BTM_INVALID_SCO_INDEX;
p_sco->p_curr_scb = nullptr;
}
break;
case BTA_AG_SCO_LISTEN_E:
/* create sco listen connection (Additional channel) */
if (p_scb != p_sco->p_curr_scb) {
bta_ag_create_sco(p_scb, false);
}
break;
case BTA_AG_SCO_SHUTDOWN_E:
if (!bta_ag_other_scb_open(p_scb)) {
p_sco->state = BTA_AG_SCO_SHUTDOWN_ST;
} else /* Other instance is still listening */
{
p_sco->state = BTA_AG_SCO_LISTEN_ST;
}
if (p_scb == p_sco->p_curr_scb) {
p_sco->p_curr_scb->sco_idx = BTM_INVALID_SCO_INDEX;
p_sco->p_curr_scb = nullptr;
}
break;
default:
log::warn("BTA_AG_SCO_SHUTTING_ST: Ignoring event {}[{}]",
bta_ag_sco_evt_str(event), event);
break;
}
break;
default:
break;
}
if (p_sco->state != previous_state) {
log::warn(
"SCO_state_change: [{}(0x{:02x})]->[{}(0x{:02x})] after event "
"[{}(0x{:02x})]",
bta_ag_sco_state_str(previous_state), previous_state,
bta_ag_sco_state_str(p_sco->state), p_sco->state,
bta_ag_sco_evt_str(event), event);
}
}
/*******************************************************************************
*
* Function bta_ag_sco_is_open
*
* Description Check if sco is open for this scb.
*
*
* Returns true if sco open for this scb, false otherwise.
*
******************************************************************************/
bool bta_ag_sco_is_open(tBTA_AG_SCB* p_scb) {
return ((bta_ag_cb.sco.state == BTA_AG_SCO_OPEN_ST) &&
(bta_ag_cb.sco.p_curr_scb == p_scb));
}
/*******************************************************************************
*
* Function bta_ag_sco_is_opening
*
* Description Check if sco is in Opening state.
*
*
* Returns true if sco is in Opening state for this scb, false
* otherwise.
*
******************************************************************************/
bool bta_ag_sco_is_opening(tBTA_AG_SCB* p_scb) {
return ((bta_ag_cb.sco.state == BTA_AG_SCO_OPENING_ST) &&
(bta_ag_cb.sco.p_curr_scb == p_scb));
}
/*******************************************************************************
*
* Function bta_ag_sco_listen
*
* Description
*
*
* Returns void
*
******************************************************************************/
void bta_ag_sco_listen(tBTA_AG_SCB* p_scb,
UNUSED_ATTR const tBTA_AG_DATA& data) {
log::info("{}", ADDRESS_TO_LOGGABLE_STR(p_scb->peer_addr));
bta_ag_sco_event(p_scb, BTA_AG_SCO_LISTEN_E);
}
/*******************************************************************************
*
* Function bta_ag_sco_open
*
* Description
*
*
* Returns void
*
******************************************************************************/
void bta_ag_sco_open(tBTA_AG_SCB* p_scb, UNUSED_ATTR const tBTA_AG_DATA& data) {
if (!sco_allowed) {
log::info("not opening sco, by policy");
return;
}
p_scb->disabled_codecs = data.api_audio_open.disabled_codecs;
log::info("disabled_codecs = {}, sco_codec = {}", p_scb->disabled_codecs,
p_scb->sco_codec);
if (p_scb->disabled_codecs & p_scb->sco_codec) {
tBTA_AG_PEER_CODEC updated_codec = BTM_SCO_CODEC_NONE;
if (hfp_hal_interface::get_swb_supported() &&
(p_scb->peer_codecs & BTM_SCO_CODEC_LC3) &&
!(p_scb->disabled_codecs & BTM_SCO_CODEC_LC3)) {
updated_codec = BTM_SCO_CODEC_LC3;
} else if ((p_scb->peer_codecs & BTM_SCO_CODEC_MSBC) &&
!(p_scb->disabled_codecs & BTM_SCO_CODEC_MSBC)) {
updated_codec = BTM_SCO_CODEC_MSBC;
} else {
updated_codec = BTM_SCO_CODEC_CVSD;
}
p_scb->sco_codec = updated_codec;
p_scb->codec_updated = true;
}
/* if another scb using sco, this is a transfer */
if (bta_ag_cb.sco.p_curr_scb && bta_ag_cb.sco.p_curr_scb != p_scb) {
log::info("transfer {} -> {}",
ADDRESS_TO_LOGGABLE_STR(bta_ag_cb.sco.p_curr_scb->peer_addr),
ADDRESS_TO_LOGGABLE_STR(p_scb->peer_addr));
bta_ag_sco_event(p_scb, BTA_AG_SCO_XFER_E);
} else {
/* else it is an open */
log::info("open {}", ADDRESS_TO_LOGGABLE_STR(p_scb->peer_addr));
bta_ag_sco_event(p_scb, BTA_AG_SCO_OPEN_E);
}
}
/*******************************************************************************
*
* Function bta_ag_sco_close
*
* Description
*
*
* Returns void
*
******************************************************************************/
void bta_ag_sco_close(tBTA_AG_SCB* p_scb,
UNUSED_ATTR const tBTA_AG_DATA& data) {
/* if scb is in use */
/* sco_idx is not allocated in SCO_CODEC_ST, still need to move to listen
* state. */
if ((p_scb->sco_idx != BTM_INVALID_SCO_INDEX) ||
(bta_ag_cb.sco.state == BTA_AG_SCO_CODEC_ST)) {
log::verbose("bta_ag_sco_close: sco_inx = {}", p_scb->sco_idx);
bta_ag_sco_event(p_scb, BTA_AG_SCO_CLOSE_E);
}
}
/*******************************************************************************
*
* Function bta_ag_sco_codec_nego
*
* Description Handles result of eSCO codec negotiation
*
*
* Returns void
*
******************************************************************************/
void bta_ag_sco_codec_nego(tBTA_AG_SCB* p_scb, bool result) {
if (result) {
/* Subsequent SCO connection will skip codec negotiation */
log::info("Succeeded for index 0x{:04x}, device {}", p_scb->sco_idx,
ADDRESS_TO_LOGGABLE_CSTR(p_scb->peer_addr));
p_scb->codec_updated = false;
bta_ag_sco_event(p_scb, BTA_AG_SCO_CN_DONE_E);
} else {
/* codec negotiation failed */
log::info("Failed for index 0x{:04x}, device {}", p_scb->sco_idx,
ADDRESS_TO_LOGGABLE_CSTR(p_scb->peer_addr));
bta_ag_sco_event(p_scb, BTA_AG_SCO_CLOSE_E);
}
}
/*******************************************************************************
*
* Function bta_ag_sco_shutdown
*
* Description
*
*
* Returns void
*
******************************************************************************/
void bta_ag_sco_shutdown(tBTA_AG_SCB* p_scb,
UNUSED_ATTR const tBTA_AG_DATA& data) {
bta_ag_sco_event(p_scb, BTA_AG_SCO_SHUTDOWN_E);
}
/*******************************************************************************
*
* Function bta_ag_sco_conn_open
*
* Description
*
*
* Returns void
*
******************************************************************************/
void bta_ag_sco_conn_open(tBTA_AG_SCB* p_scb,
UNUSED_ATTR const tBTA_AG_DATA& data) {
bta_ag_sco_event(p_scb, BTA_AG_SCO_CONN_OPEN_E);
bta_sys_sco_open(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
if (IS_FLAG_ENABLED(is_sco_managed_by_audio)) {
// ConfirmStreamingRequest before sends callback to java layer
hfp_offload_interface->ConfirmStreamingRequest();
bool is_controller_codec = false;
if (sco_config_map.find(p_scb->inuse_codec) == sco_config_map.end()) {
log::error("sco_config_map does not have inuse_codec={}",
p_scb->inuse_codec);
} else {
is_controller_codec =
sco_config_map[p_scb->inuse_codec].useControllerCodec;
}
hfp::offload_config config{
.sco_codec = p_scb->inuse_codec,
.connection_handle = p_scb->conn_handle,
.is_controller_codec = is_controller_codec,
.is_nrec = p_scb->nrec_enabled,
};
hfp_offload_interface->UpdateAudioConfigToHal(config);
}
/* call app callback */
bta_ag_cback_sco(p_scb, BTA_AG_AUDIO_OPEN_EVT);
/* reset retransmission_effort_retries*/
p_scb->retransmission_effort_retries = 0;
/* reset to mSBC T2 settings as the preferred */
p_scb->codec_msbc_settings = BTA_AG_SCO_MSBC_SETTINGS_T2;
/* reset to LC3 T2 settings as the preferred */
p_scb->codec_lc3_settings = BTA_AG_SCO_LC3_SETTINGS_T2;
/* reset to SWB Q0 settings as the preferred */
p_scb->codec_aptx_settings = BTA_AG_SCO_APTX_SWB_SETTINGS_Q0;
}
/*******************************************************************************
*
* Function bta_ag_sco_conn_close
*
* Description
*
*
* Returns void
*
******************************************************************************/
void bta_ag_sco_conn_close(tBTA_AG_SCB* p_scb,
UNUSED_ATTR const tBTA_AG_DATA& data) {
/* clear current scb */
bta_ag_cb.sco.p_curr_scb = nullptr;
p_scb->sco_idx = BTM_INVALID_SCO_INDEX;
const bool aptx_voice = is_hfp_aptx_voice_enabled() &&
p_scb->codec_fallback &&
(p_scb->sco_codec == BTA_AG_SCO_APTX_SWB_SETTINGS_Q0);
log::verbose("aptx_voice={}, codec_fallback={:#x}, sco_codec={:#x}",
logbool(aptx_voice), p_scb->codec_fallback, p_scb->sco_codec);
/* codec_fallback is set when AG is initiator and connection failed for mSBC.
* OR if codec is msbc and T2 settings failed, then retry Safe T1 settings
* same operations for LC3 settings */
if (p_scb->svc_conn &&
(p_scb->codec_fallback ||
(p_scb->sco_codec == BTM_SCO_CODEC_MSBC &&
p_scb->codec_msbc_settings == BTA_AG_SCO_MSBC_SETTINGS_T1) ||
(p_scb->sco_codec == BTM_SCO_CODEC_LC3 &&
p_scb->codec_lc3_settings == BTA_AG_SCO_LC3_SETTINGS_T1) ||
(IS_FLAG_ENABLED(retry_esco_with_zero_retransmission_effort) &&
p_scb->retransmission_effort_retries == 1) ||
aptx_voice)) {
bta_ag_sco_event(p_scb, BTA_AG_SCO_REOPEN_E);
} else {
/* Indicate if the closing of audio is because of transfer */
bta_ag_sco_event(p_scb, BTA_AG_SCO_CONN_CLOSE_E);
bta_sys_sco_close(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
/* if av got suspended by this call, let it resume. */
/* In case call stays alive regardless of sco, av should not be affected. */
if (((p_scb->call_ind == BTA_AG_CALL_INACTIVE) &&
(p_scb->callsetup_ind == BTA_AG_CALLSETUP_NONE)) ||
(p_scb->post_sco == BTA_AG_POST_SCO_CALL_END)) {
bta_sys_sco_unuse(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
}
/* call app callback */
bta_ag_cback_sco(p_scb, BTA_AG_AUDIO_CLOSE_EVT);
p_scb->codec_msbc_settings = BTA_AG_SCO_MSBC_SETTINGS_T2;
p_scb->codec_lc3_settings = BTA_AG_SCO_LC3_SETTINGS_T2;
p_scb->codec_aptx_settings = BTA_AG_SCO_APTX_SWB_SETTINGS_Q0;
}
}
/*******************************************************************************
*
* Function bta_ag_sco_conn_rsp
*
* Description Process the SCO connection request
*
*
* Returns void
*
******************************************************************************/
void bta_ag_sco_conn_rsp(tBTA_AG_SCB* p_scb,
tBTM_ESCO_CONN_REQ_EVT_DATA* p_data) {
bta_ag_cb.sco.is_local = false;
log::verbose("eSCO {}, state {}",
controller_get_interface()
->supports_enhanced_setup_synchronous_connection(),
bta_ag_cb.sco.state);
if (bta_ag_cb.sco.state == BTA_AG_SCO_LISTEN_ST ||
bta_ag_cb.sco.state == BTA_AG_SCO_CLOSE_XFER_ST ||
bta_ag_cb.sco.state == BTA_AG_SCO_OPEN_XFER_ST) {
/* tell sys to stop av if any */
bta_sys_sco_use(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
/* When HS initiated SCO, it cannot be WBS. */
}
/* If SCO open was initiated from HS, it must be CVSD */
p_scb->inuse_codec = BTM_SCO_CODEC_NONE;
/* Send pending commands to create SCO connection to peer */
bta_ag_create_pending_sco(p_scb, bta_ag_cb.sco.is_local);
}
bool bta_ag_get_sco_offload_enabled() {
return hfp_hal_interface::get_offload_enabled();
}
void bta_ag_set_sco_offload_enabled(bool value) {
hfp_hal_interface::enable_offload(value);
}
void bta_ag_set_sco_allowed(bool value) {
sco_allowed = value;
log::verbose("{}", sco_allowed ? "sco now allowed" : "sco now not allowed");
}
const RawAddress& bta_ag_get_active_device() { return active_device_addr; }
void bta_clear_active_device() {
log::debug("Set bta active device to null");
if (IS_FLAG_ENABLED(is_sco_managed_by_audio)) {
if (hfp_offload_interface && !active_device_addr.IsEmpty()) {
hfp_offload_interface->StopSession();
}
}
active_device_addr = RawAddress::kEmpty;
}
void bta_ag_api_set_active_device(const RawAddress& new_active_device) {
if (new_active_device.IsEmpty()) {
log::error("empty device");
return;
}
if (IS_FLAG_ENABLED(is_sco_managed_by_audio)) {
if (!hfp_client_interface) {
hfp_client_interface = std::unique_ptr<HfpInterface>(HfpInterface::Get());
if (!hfp_client_interface) {
log::error("could not acquire audio source interface");
return;
}
}
if (!hfp_offload_interface) {
hfp_offload_interface = std::unique_ptr<HfpInterface::Offload>(
hfp_client_interface->GetOffload(get_main_thread()));
sco_config_map = hfp_offload_interface->GetHfpScoConfig();
if (!hfp_offload_interface) {
log::warn("could not get offload interface");
} else {
// start audio session if there was no previous active device
// if there was an active device, java layer would call disconnectAudio
if (active_device_addr.IsEmpty()) {
hfp_offload_interface->StartSession();
}
}
}
}
active_device_addr = new_active_device;
}