/****************************************************************************** * * 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 #include "bt_common.h" #include "bta_ag_api.h" #include "bta_ag_int.h" #include "bta_api.h" #include "btm_api.h" #include "device/include/controller.h" #include "device/include/esco_parameters.h" #include "osi/include/osi.h" #include "utl.h" /* Codec negotiation timeout */ #ifndef BTA_AG_CODEC_NEGOTIATION_TIMEOUT_MS #define BTA_AG_CODEC_NEGOTIATION_TIMEOUT_MS (3 * 1000) /* 3 seconds */ #endif static bool sco_allowed = true; static RawAddress active_device_addr = {}; /* 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; } 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 != 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_bta_thread(FROM_HERE, base::Bind(&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; 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 != 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) { /* 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; do_in_bta_thread(FROM_HERE, base::Bind(&bta_ag_sm_execute_by_handle, handle, BTA_AG_SCO_CLOSE_EVT, tBTA_AG_DATA::kEmpty)); } 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 != 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); 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) { /* 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) { 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 = nullptr; bta_ag_cb.sco.state = BTA_AG_SCO_LISTEN_ST; bta_ag_sco_conn_rsp(p_scb, &p_data->conn_evt); } } } else { LOG(WARNING) << __func__ << ": reject incoming SCO connection, remote_bda=" << (remote_bda ? *remote_bda : RawAddress::kEmpty) << ", active_bda=" << active_device_addr << ", current_bda=" << (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); } } 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, device=%s", __func__, p_scb->codec_updated, p_scb->codec_fallback, p_scb->sco_codec, p_scb->peer_codecs, p_scb->codec_msbc_settings, p_scb->peer_addr.ToString().c_str()); tBTA_AG_PEER_CODEC esco_codec = BTA_AG_CODEC_CVSD; if (!bta_ag_sco_is_active_device(p_scb->peer_addr)) { LOG(WARNING) << __func__ << ": device " << p_scb->peer_addr << " is not active, active_device=" << active_device_addr; return; } /* Make sure this SCO handle is not already in use */ if (p_scb->sco_idx != BTM_INVALID_SCO_INDEX) { APPL_TRACE_ERROR("%s: device %s, index 0x%04x already in use!", __func__, p_scb->peer_addr.ToString().c_str(), 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); APPL_TRACE_API("%s: orig %d, inx 0x%04x, pkt types 0x%04x", __func__, is_orig, p_scb->sco_idx, params.packet_types); } else { /* Not initiating, go to listen mode */ tBTM_STATUS 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 (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, device=%s", __func__, p_scb->codec_updated, p_scb->codec_fallback, p_scb->sco_codec, p_scb->peer_codecs, p_scb->codec_msbc_settings, p_scb->peer_addr.ToString().c_str()); } /******************************************************************************* * * 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_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; } APPL_TRACE_DEBUG("%s: initiated SCO connection", __func__); } 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); APPL_TRACE_DEBUG("%s: listening for SCO connection", __func__); } } /******************************************************************************* * * 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); /* 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 */ 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; uint8_t previous_state = p_sco->state; APPL_TRACE_EVENT("%s: index=0x%04x, device=%s, state=%s[%d], event=%s[%d]", __func__, p_scb->sco_idx, p_scb->peer_addr.ToString().c_str(), 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: APPL_TRACE_WARNING( "%s: BTA_AG_SCO_SHUTDOWN_ST: Ignoring event %s[%d]", __func__, 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); /* 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 = 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 */ APPL_TRACE_WARNING("%s: BTA_AG_SCO_LISTEN_ST: Ignoring event %s[%d]", __func__, 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: APPL_TRACE_WARNING("%s: BTA_AG_SCO_LISTEN_ST: Ignoring event %s[%d]", __func__, 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: /* 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 %s[%d]", __func__, 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; 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 %s[%d]", __func__, 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: APPL_TRACE_WARNING("%s: BTA_AG_SCO_OPEN_CL_ST: Ignoring event %s[%d]", __func__, 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: APPL_TRACE_WARNING( "%s: BTA_AG_SCO_OPEN_XFER_ST: Ignoring event %s[%d]", __func__, 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: APPL_TRACE_WARNING("%s: BTA_AG_SCO_OPEN_ST: Ignoring event %s[%d]", __func__, 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: APPL_TRACE_WARNING("%s: BTA_AG_SCO_CLOSING_ST: Ignoring event %s[%d]", __func__, 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: APPL_TRACE_WARNING( "%s: BTA_AG_SCO_CLOSE_OP_ST: Ignoring event %s[%d]", __func__, 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_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 = nullptr; bta_ag_codec_negotiate(p_cn_scb); break; } default: APPL_TRACE_WARNING( "%s: BTA_AG_SCO_CLOSE_XFER_ST: Ignoring event %s[%d]", __func__, 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; } 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: APPL_TRACE_WARNING( "%s: BTA_AG_SCO_SHUTTING_ST: Ignoring event %s[%d]", __func__, bta_ag_sco_evt_str(event), event); break; } break; default: break; } if (p_sco->state != previous_state) { APPL_TRACE_EVENT( "%s: SCO_state_change: [%s(0x%02x)]->[%s(0x%02x)] " "after event [%s(0x%02x)]", __func__, 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) << __func__ << ": " << 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) << __func__ << ": not opening sco, by policy"; return; } /* 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) << __func__ << ": tranfer " << bta_ag_cb.sco.p_curr_scb->peer_addr << " -> " << p_scb->peer_addr; bta_ag_sco_event(p_scb, BTA_AG_SCO_XFER_E); } else { /* else it is an open */ LOG(INFO) << __func__ << ": open " << 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)) { 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) { /* Subsequent SCO connection will skip codec negotiation */ APPL_TRACE_DEBUG("%s: Succeeded for index 0x%04x, device %s", __func__, p_scb->sco_idx, p_scb->peer_addr.ToString().c_str()); 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, device %s", __func__, p_scb->sco_idx, p_scb->peer_addr.ToString().c_str()); 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); /* 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 const tBTA_AG_DATA& data) { /* clear current scb */ bta_ag_cb.sco.p_curr_scb = nullptr; 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 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); } void bta_ag_set_sco_allowed(bool value) { sco_allowed = value; APPL_TRACE_DEBUG(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() { active_device_addr = RawAddress::kEmpty; } void bta_ag_api_set_active_device(const RawAddress& new_active_device) { if (new_active_device.IsEmpty()) { APPL_TRACE_ERROR("%s: empty device", __func__); return; } active_device_addr = new_active_device; }