/******************************************************************************
*
* Copyright (C) 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 <stddef.h>
#include "bt_common.h"
#include "bta_ag_api.h"
#include "bta_ag_co.h"
#include "bta_ag_int.h"
#include "bta_api.h"
#if (BTM_SCO_HCI_INCLUDED == TRUE)
#include "bta_dm_co.h"
#endif
#include "btm_api.h"
#include "device/include/controller.h"
#include "device/include/esco_parameters.h"
#include "osi/include/osi.h"
#include "utl.h"
#ifndef BTA_AG_SCO_DEBUG
#define BTA_AG_SCO_DEBUG FALSE
#endif
/* Codec negotiation timeout */
#ifndef BTA_AG_CODEC_NEGOTIATION_TIMEOUT_MS
#define BTA_AG_CODEC_NEGOTIATION_TIMEOUT_MS (3 * 1000) /* 3 seconds */
#endif
extern fixed_queue_t* btu_bta_alarm_queue;
#if (BTA_AG_SCO_DEBUG == TRUE)
static char* bta_ag_sco_evt_str(uint8_t event);
static char* bta_ag_sco_state_str(uint8_t state);
#endif
#define BTA_AG_NO_EDR_ESCO \
(ESCO_PKT_TYPES_MASK_NO_2_EV3 | ESCO_PKT_TYPES_MASK_NO_3_EV3 | \
ESCO_PKT_TYPES_MASK_NO_2_EV5 | ESCO_PKT_TYPES_MASK_NO_3_EV5)
/* 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 */
BTA_AG_SCO_CI_DATA_E /* SCO data ready */
};
static void bta_ag_create_pending_sco(tBTA_AG_SCB* p_scb, bool is_local);
/*******************************************************************************
*
* 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 != NULL && 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) {
BT_HDR* p_buf = (BT_HDR*)osi_malloc(sizeof(BT_HDR));
p_buf->event = BTA_AG_SCO_OPEN_EVT;
p_buf->layer_specific = handle;
bta_sys_sendmsg(p_buf);
} else {
/* no match found; disconnect sco, init sco variables */
bta_ag_cb.sco.p_curr_scb = NULL;
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;
APPL_TRACE_DEBUG(
"bta_ag_sco_disc_cback(): sco_idx: 0x%x p_cur_scb: 0x%08x sco.state: "
"%d",
sco_idx, bta_ag_cb.sco.p_curr_scb, bta_ag_cb.sco.state);
APPL_TRACE_DEBUG(
"bta_ag_sco_disc_cback(): scb[0] addr: 0x%08x in_use: %u sco_idx: 0x%x "
" sco state: %u",
&bta_ag_cb.scb[0], bta_ag_cb.scb[0].in_use, bta_ag_cb.scb[0].sco_idx,
bta_ag_cb.scb[0].state);
APPL_TRACE_DEBUG(
"bta_ag_sco_disc_cback(): scb[1] addr: 0x%08x in_use: %u sco_idx: 0x%x "
" sco state: %u",
&bta_ag_cb.scb[1], bta_ag_cb.scb[1].in_use, bta_ag_cb.scb[1].sco_idx,
bta_ag_cb.scb[1].state);
/* match callback to scb */
if (bta_ag_cb.sco.p_curr_scb != NULL && 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) {
#if (BTM_SCO_HCI_INCLUDED == TRUE)
tBTM_STATUS status =
BTM_ConfigScoPath(ESCO_DATA_PATH_PCM, NULL, NULL, true);
APPL_TRACE_DEBUG("%s: sco close config status = %d", __func__, status);
/* SCO clean up here */
bta_dm_sco_co_close();
#endif
/* Restore settings */
if (bta_ag_cb.sco.p_curr_scb->inuse_codec == BTA_AG_CODEC_MSBC) {
/* 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 */
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->codec_msbc_settings ==
BTA_AG_SCO_MSBC_SETTINGS_T2) {
APPL_TRACE_WARNING(
"%s: eSCO/SCO failed to open, falling back to mSBC T1 settings",
__func__);
bta_ag_cb.sco.p_curr_scb->codec_msbc_settings =
BTA_AG_SCO_MSBC_SETTINGS_T1;
} else {
APPL_TRACE_WARNING(
"%s: eSCO/SCO failed to open, falling back to CVSD", __func__);
bta_ag_cb.sco.p_curr_scb->codec_fallback = true;
}
}
} else if (bta_ag_sco_is_opening(bta_ag_cb.sco.p_curr_scb)) {
APPL_TRACE_ERROR("%s: eSCO/SCO failed to open, no more fall back",
__func__);
}
bta_ag_cb.sco.p_curr_scb->inuse_codec = BTA_AG_CODEC_NONE;
BT_HDR* p_buf = (BT_HDR*)osi_malloc(sizeof(BT_HDR));
p_buf->event = BTA_AG_SCO_CLOSE_EVT;
p_buf->layer_specific = handle;
bta_sys_sendmsg(p_buf);
} else {
/* no match found */
APPL_TRACE_DEBUG("no scb for ag_sco_disc_cback");
/* sco could be closed after scb dealloc'ed */
if (bta_ag_cb.sco.p_curr_scb != NULL) {
bta_ag_cb.sco.p_curr_scb->sco_idx = BTM_INVALID_SCO_INDEX;
bta_ag_cb.sco.p_curr_scb = NULL;
bta_ag_cb.sco.state = BTA_AG_SCO_SHUTDOWN_ST;
}
}
}
#if (BTM_SCO_HCI_INCLUDED == TRUE)
/*******************************************************************************
*
* Function bta_ag_sco_read_cback
*
* Description Callback function is the callback function for incoming
* SCO data over HCI.
*
* Returns void
*
******************************************************************************/
static void bta_ag_sco_read_cback(uint16_t sco_inx, BT_HDR* p_data,
tBTM_SCO_DATA_FLAG status) {
if (status != BTM_SCO_DATA_CORRECT) {
APPL_TRACE_DEBUG("%s: status %d", __func__, status);
}
/* Callout function must free the data. */
bta_dm_sco_co_in_data(p_data, status);
}
#endif
/*******************************************************************************
*
* 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);
APPL_TRACE_DEBUG("%s: SCO index 0x%04x, status %d", __func__,
p_scb->sco_idx, 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) {
tBTA_AG_SCB* p_scb;
uint16_t handle;
uint16_t sco_inx = p_data->conn_evt.sco_inx;
/* Only process connection requests */
if (event == BTM_ESCO_CONN_REQ_EVT) {
if ((handle = bta_ag_idx_by_bdaddr(BTM_ReadScoBdAddr(sco_inx))) != 0 &&
((p_scb = bta_ag_scb_by_idx(handle)) != NULL) && 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) {
APPL_TRACE_EVENT("%s: Accept Conn Request (sco_inx 0x%04x)", __func__,
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 */
APPL_TRACE_DEBUG("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)) {
APPL_TRACE_ERROR(
"%s: Nothing to remove,so accept Conn Request(sco_inx 0x%04x)",
__func__, sco_inx);
bta_ag_cb.sco.p_xfer_scb = NULL;
bta_ag_cb.sco.state = BTA_AG_SCO_LISTEN_ST;
bta_ag_sco_conn_rsp(p_scb, &p_data->conn_evt);
}
}
} else {
/* If error occurred send reject response immediately */
APPL_TRACE_WARNING(
"no scb for bta_ag_esco_connreq_cback or no resources");
BTM_EScoConnRsp(p_data->conn_evt.sco_inx, HCI_ERR_HOST_REJECT_RESOURCES,
(enh_esco_params_t*)NULL);
}
} else if (event == BTM_ESCO_CHG_EVT) {
/* Received a change in the esco link */
APPL_TRACE_EVENT(
"%s: eSCO change event (inx %d): rtrans %d, "
"rxlen %d, txlen %d, txint %d",
__func__, p_data->chg_evt.sco_inx, p_data->chg_evt.retrans_window,
p_data->chg_evt.rx_pkt_len, p_data->chg_evt.tx_pkt_len,
p_data->chg_evt.tx_interval);
}
}
/*******************************************************************************
*
* 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, uint8_t 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)(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
*
******************************************************************************/
static void bta_ag_create_sco(tBTA_AG_SCB* p_scb, bool is_orig) {
APPL_TRACE_DEBUG(
"%s: BEFORE codec_updated=%d, codec_fallback=%d, "
"sco_codec=%d, peer_codec=%d, msbc_settings=%d",
__func__, p_scb->codec_updated, p_scb->codec_fallback, p_scb->sco_codec,
p_scb->peer_codecs, p_scb->codec_msbc_settings);
tBTA_AG_PEER_CODEC esco_codec = BTA_AG_CODEC_CVSD;
/* Make sure this SCO handle is not already in use */
if (p_scb->sco_idx != BTM_INVALID_SCO_INDEX) {
APPL_TRACE_ERROR("%s: Index 0x%04x already in use!", __func__,
p_scb->sco_idx);
return;
}
if ((p_scb->sco_codec == BTA_AG_CODEC_MSBC) && !p_scb->codec_fallback)
esco_codec = BTA_AG_CODEC_MSBC;
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;
}
esco_codec_t codec_index = ESCO_CODEC_CVSD;
/* If WBS included, use CVSD by default, index is 0 for CVSD by
* initialization. If eSCO codec is mSBC, index is T2 or T1 */
if (esco_codec == BTA_AG_CODEC_MSBC) {
if (p_scb->codec_msbc_settings == BTA_AG_SCO_MSBC_SETTINGS_T2) {
codec_index = ESCO_CODEC_MSBC_T2;
} else {
codec_index = ESCO_CODEC_MSBC_T1;
}
}
/* Initialize eSCO parameters */
enh_esco_params_t params = esco_parameters_for_codec(codec_index);
/* For CVSD */
if (esco_codec == BTM_SCO_CODEC_CVSD) {
/* Use the applicable packet types
(3-EV3 not allowed due to errata 2363) */
params.packet_types =
p_bta_ag_cfg->sco_pkt_types | ESCO_PKT_TYPES_MASK_NO_3_EV3;
if ((!(p_scb->features & BTA_AG_FEAT_ESCO)) ||
(!(p_scb->peer_features & BTA_AG_PEER_FEAT_ESCO))) {
params.max_latency_ms = 10;
params.retransmission_effort = ESCO_RETRANSMISSION_POWER;
}
}
/* If initiating, setup parameters to start SCO/eSCO connection */
if (is_orig) {
bta_ag_cb.sco.is_local = true;
/* Set eSCO Mode */
BTM_SetEScoMode(¶ms);
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);
} else {
/* Not initiating, go to listen mode */
uint8_t* p_bd_addr = NULL;
p_bd_addr = p_scb->peer_addr;
tBTM_STATUS status =
BTM_CreateSco(p_bd_addr, false, params.packet_types, &p_scb->sco_idx,
bta_ag_sco_conn_cback, bta_ag_sco_disc_cback);
if (status == BTM_CMD_STARTED)
BTM_RegForEScoEvts(p_scb->sco_idx, bta_ag_esco_connreq_cback);
APPL_TRACE_API("%s: orig %d, inx 0x%04x, status 0x%x, pkt types 0x%04x",
__func__, is_orig, p_scb->sco_idx, status,
params.packet_types);
}
APPL_TRACE_DEBUG(
"%s: AFTER codec_updated=%d, codec_fallback=%d, "
"sco_codec=%d, peer_codec=%d, msbc_settings=%d",
__func__, p_scb->codec_updated, p_scb->codec_fallback, p_scb->sco_codec,
p_scb->peer_codecs, p_scb->codec_msbc_settings);
}
/*******************************************************************************
*
* 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
*
******************************************************************************/
static 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;
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 == BTA_AG_CODEC_MSBC) {
if (p_scb->codec_msbc_settings == BTA_AG_SCO_MSBC_SETTINGS_T2) {
params = esco_parameters_for_codec(ESCO_CODEC_MSBC_T2);
} else
params = esco_parameters_for_codec(ESCO_CODEC_MSBC_T1);
} else {
params = esco_parameters_for_codec(ESCO_CODEC_CVSD);
if ((!(p_scb->features & BTA_AG_FEAT_ESCO)) ||
(!(p_scb->peer_features & BTA_AG_PEER_FEAT_ESCO))) {
params.max_latency_ms = 10;
params.retransmission_effort = ESCO_RETRANSMISSION_POWER;
}
}
/* Bypass voice settings if enhanced SCO setup command is supported */
if (!(controller_get_interface()
->supports_enhanced_setup_synchronous_connection())) {
if (esco_codec == BTA_AG_CODEC_MSBC)
BTM_WriteVoiceSettings(BTM_VOICE_SETTING_TRANS);
else
BTM_WriteVoiceSettings(BTM_VOICE_SETTING_CVSD);
}
#if (BTM_SCO_HCI_INCLUDED == TRUE)
/* initialize SCO setup, no voice setting for AG, data rate <==> sample
* rate */
BTM_ConfigScoPath(params.input_data_path, bta_ag_sco_read_cback, NULL,
TRUE);
#endif
tBTM_STATUS status = BTM_CreateSco(
p_scb->peer_addr, true, params.packet_types, &p_scb->sco_idx,
bta_ag_sco_conn_cback, bta_ag_sco_disc_cback);
if (status == BTM_CMD_STARTED) {
/* Initiating the connection, set the current sco handle */
bta_ag_cb.sco.cur_idx = p_scb->sco_idx;
}
} else {
/* Local device accepted SCO connection from peer */
params = esco_parameters_for_codec(ESCO_CODEC_CVSD);
if ((!(p_scb->features & BTA_AG_FEAT_ESCO)) ||
(!(p_scb->peer_features & BTA_AG_PEER_FEAT_ESCO))) {
params.max_latency_ms = 10;
params.retransmission_effort = ESCO_RETRANSMISSION_POWER;
}
BTM_EScoConnRsp(p_scb->sco_idx, HCI_SUCCESS, ¶ms);
}
}
/*******************************************************************************
*
* Function bta_ag_codec_negotiation_timer_cback
*
* Description
*
*
* Returns void
*
******************************************************************************/
static void bta_ag_codec_negotiation_timer_cback(void* data) {
APPL_TRACE_DEBUG("%s", __func__);
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) {
APPL_TRACE_DEBUG("%s", __func__);
bta_ag_cb.sco.p_curr_scb = p_scb;
if ((p_scb->codec_updated || p_scb->codec_fallback) &&
(p_scb->peer_features & BTA_AG_PEER_FEAT_CODEC)) {
/* 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);
/* Send +BCS to the peer */
bta_ag_send_bcs(p_scb, NULL);
/* Start timer to handle timeout */
alarm_set_on_queue(
p_scb->codec_negotiation_timer, BTA_AG_CODEC_NEGOTIATION_TIMEOUT_MS,
bta_ag_codec_negotiation_timer_cback, p_scb, btu_bta_alarm_queue);
} else {
/* use same codec type as previous SCO connection, skip codec negotiation */
APPL_TRACE_DEBUG(
"use same codec type as previous SCO connection,skip codec "
"negotiation");
bta_ag_sco_codec_nego(p_scb, true);
}
}
/*******************************************************************************
*
* Function bta_ag_sco_event
*
* Description
*
*
* Returns void
*
******************************************************************************/
static void bta_ag_sco_event(tBTA_AG_SCB* p_scb, uint8_t event) {
tBTA_AG_SCO_CB* p_sco = &bta_ag_cb.sco;
#if (BTM_SCO_HCI_INCLUDED == TRUE)
BT_HDR* p_buf;
#endif
#if (BTA_AG_SCO_DEBUG == TRUE)
uint8_t in_state = p_sco->state;
if (event != BTA_AG_SCO_CI_DATA_E) {
APPL_TRACE_EVENT("%s: SCO Index 0x%04x, State %d (%s), Event %d (%s)",
__func__, p_scb->sco_idx, p_sco->state,
bta_ag_sco_state_str(p_sco->state), event,
bta_ag_sco_evt_str(event));
}
#else
if (event != BTA_AG_SCO_CI_DATA_E) {
APPL_TRACE_EVENT("%s: SCO Index 0x%04x, State %d, Event %d", __func__,
p_scb->sco_idx, p_sco->state, event);
}
#endif
#if (BTM_SCO_HCI_INCLUDED == TRUE)
if (event == BTA_AG_SCO_CI_DATA_E) {
while (true) {
bta_dm_sco_co_out_data(&p_buf);
if (p_buf) {
if (p_sco->state == BTA_AG_SCO_OPEN_ST)
BTM_WriteScoData(p_sco->p_curr_scb->sco_idx, p_buf);
else
osi_free(p_buf);
} else
break;
}
return;
}
#endif
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:
APPL_TRACE_WARNING("%s: BTA_AG_SCO_SHUTDOWN_ST: Ignoring event %d",
__func__, 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);
/* start codec negotiation */
p_sco->state = BTA_AG_SCO_CODEC_ST;
bta_ag_codec_negotiate(p_scb);
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 = NULL;
/* 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
*/
APPL_TRACE_WARNING("%s: BTA_AG_SCO_LISTEN_ST: Ignoring event %d",
__func__, 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:
APPL_TRACE_WARNING("%s: BTA_AG_SCO_LISTEN_ST: Ignoring event %d",
__func__, 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 = NULL;
/* 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:
/* 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:
APPL_TRACE_WARNING("%s: BTA_AG_SCO_CODEC_ST: Ignoring event %d",
__func__, 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;
case BTA_AG_SCO_REOPEN_E:
/* start codec negotiation */
p_sco->state = BTA_AG_SCO_CODEC_ST;
bta_ag_codec_negotiate(p_scb);
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_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:
APPL_TRACE_WARNING("%s: BTA_AG_SCO_OPENING_ST: Ignoring event %d",
__func__, 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:
APPL_TRACE_WARNING("%s: BTA_AG_SCO_OPEN_CL_ST: Ignoring event %d",
__func__, 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 = NULL;
break;
default:
APPL_TRACE_WARNING("%s: BTA_AG_SCO_OPEN_XFER_ST: Ignoring event %d",
__func__, 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:
APPL_TRACE_WARNING("%s: BTA_AG_SCO_OPEN_ST: Ignoring event %d",
__func__, 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:
APPL_TRACE_WARNING("%s: BTA_AG_SCO_CLOSING_ST: Ignoring event %d",
__func__, 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:
APPL_TRACE_WARNING("%s: BTA_AG_SCO_CLOSE_OP_ST: Ignoring event %d",
__func__, 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 = NULL;
p_sco->state = BTA_AG_SCO_CLOSING_ST;
break;
case BTA_AG_SCO_SHUTDOWN_E:
/* clear xfer scb */
p_sco->p_xfer_scb = NULL;
p_sco->state = BTA_AG_SCO_SHUTTING_ST;
break;
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);
/* 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 = NULL;
bta_ag_codec_negotiate(p_cn_scb);
break;
}
default:
APPL_TRACE_WARNING("%s: BTA_AG_SCO_CLOSE_XFER_ST: Ignoring event %d",
__func__, 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;
} 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 = NULL;
}
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 = NULL;
}
break;
default:
APPL_TRACE_WARNING("%s: BTA_AG_SCO_SHUTTING_ST: Ignoring event %d",
__func__, event);
break;
}
break;
default:
break;
}
#if (BTA_AG_SCO_DEBUG == TRUE)
if (p_sco->state != in_state) {
APPL_TRACE_EVENT("BTA AG SCO State Change: [%s] -> [%s] after Event [%s]",
bta_ag_sco_state_str(in_state),
bta_ag_sco_state_str(p_sco->state),
bta_ag_sco_evt_str(event));
}
#endif
}
/*******************************************************************************
*
* 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 tBTA_AG_DATA* p_data) {
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 tBTA_AG_DATA* p_data) {
uint8_t event;
/* if another scb using sco, this is a transfer */
if (bta_ag_cb.sco.p_curr_scb != NULL && bta_ag_cb.sco.p_curr_scb != p_scb) {
event = BTA_AG_SCO_XFER_E;
}
/* else it is an open */
else {
event = BTA_AG_SCO_OPEN_E;
}
bta_ag_sco_event(p_scb, event);
}
/*******************************************************************************
*
* Function bta_ag_sco_close
*
* Description
*
*
* Returns void
*
******************************************************************************/
void bta_ag_sco_close(tBTA_AG_SCB* p_scb, UNUSED_ATTR tBTA_AG_DATA* p_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))
{
APPL_TRACE_DEBUG("bta_ag_sco_close: sco_inx = %d", 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 == true) {
/* Subsequent SCO connection will skip codec negotiation */
APPL_TRACE_DEBUG("%s: Succeeded for index 0x%04x", __func__,
p_scb->sco_idx);
p_scb->codec_updated = false;
bta_ag_sco_event(p_scb, BTA_AG_SCO_CN_DONE_E);
} else {
/* codec negotiation failed */
APPL_TRACE_ERROR("%s: Failed for index 0x%04x", __func__, p_scb->sco_idx);
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 tBTA_AG_DATA* p_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 tBTA_AG_DATA* p_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 (BTM_SCO_HCI_INCLUDED == TRUE)
/* open SCO codec if SCO is routed through transport */
bta_dm_sco_co_open(bta_ag_scb_to_idx(p_scb), BTA_SCO_OUT_PKT_SIZE,
BTA_AG_CI_SCO_DATA_EVT);
#endif
/* call app callback */
bta_ag_cback_sco(p_scb, BTA_AG_AUDIO_OPEN_EVT);
/* reset to mSBC T2 settings as the preferred */
p_scb->codec_msbc_settings = BTA_AG_SCO_MSBC_SETTINGS_T2;
}
/*******************************************************************************
*
* Function bta_ag_sco_conn_close
*
* Description
*
*
* Returns void
*
******************************************************************************/
void bta_ag_sco_conn_close(tBTA_AG_SCB* p_scb,
UNUSED_ATTR tBTA_AG_DATA* p_data) {
/* clear current scb */
bta_ag_cb.sco.p_curr_scb = NULL;
p_scb->sco_idx = BTM_INVALID_SCO_INDEX;
/* 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 */
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))) {
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;
}
}
/*******************************************************************************
*
* 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;
APPL_TRACE_DEBUG("%s: eSCO %d, state %d", __func__,
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 (BTM_SCO_HCI_INCLUDED == TRUE)
/* Configure the transport being used */
BTM_ConfigScoPath(resp.input_data_path, bta_ag_sco_read_cback, NULL, TRUE);
#endif
}
/* If SCO open was initiated from HS, it must be CVSD */
p_scb->inuse_codec = BTA_AG_CODEC_NONE;
/* Send pending commands to create SCO connection to peer */
bta_ag_create_pending_sco(p_scb, bta_ag_cb.sco.is_local);
}
/*******************************************************************************
*
* Function bta_ag_ci_sco_data
*
* Description Process the SCO data ready callin event
*
*
* Returns void
*
******************************************************************************/
void bta_ag_ci_sco_data(UNUSED_ATTR tBTA_AG_SCB* p_scb,
UNUSED_ATTR tBTA_AG_DATA* p_data) {
#if (BTM_SCO_HCI_INCLUDED == TRUE)
bta_ag_sco_event(p_scb, BTA_AG_SCO_CI_DATA_E);
#endif
}
/*******************************************************************************
* Debugging functions
******************************************************************************/
#if (BTA_AG_SCO_DEBUG == TRUE)
static char* bta_ag_sco_evt_str(uint8_t event) {
switch (event) {
case BTA_AG_SCO_LISTEN_E:
return "Listen Request";
case BTA_AG_SCO_OPEN_E:
return "Open Request";
case BTA_AG_SCO_XFER_E:
return "Transfer Request";
case BTA_AG_SCO_CN_DONE_E:
return "Codec Negotiation Done";
case BTA_AG_SCO_REOPEN_E:
return "Reopen Request";
case BTA_AG_SCO_CLOSE_E:
return "Close Request";
case BTA_AG_SCO_SHUTDOWN_E:
return "Shutdown Request";
case BTA_AG_SCO_CONN_OPEN_E:
return "Opened";
case BTA_AG_SCO_CONN_CLOSE_E:
return "Closed";
case BTA_AG_SCO_CI_DATA_E:
return "Sco Data";
default:
return "Unknown SCO Event";
}
}
static char* bta_ag_sco_state_str(uint8_t state) {
switch (state) {
case BTA_AG_SCO_SHUTDOWN_ST:
return "Shutdown";
case BTA_AG_SCO_LISTEN_ST:
return "Listening";
case BTA_AG_SCO_CODEC_ST:
return "Codec Negotiation";
case BTA_AG_SCO_OPENING_ST:
return "Opening";
case BTA_AG_SCO_OPEN_CL_ST:
return "Open while closing";
case BTA_AG_SCO_OPEN_XFER_ST:
return "Opening while Transferring";
case BTA_AG_SCO_OPEN_ST:
return "Open";
case BTA_AG_SCO_CLOSING_ST:
return "Closing";
case BTA_AG_SCO_CLOSE_OP_ST:
return "Close while Opening";
case BTA_AG_SCO_CLOSE_XFER_ST:
return "Close while Transferring";
case BTA_AG_SCO_SHUTTING_ST:
return "Shutting Down";
default:
return "Unknown SCO State";
}
}
#endif /* (BTA_AG_SCO_DEBUG) */