/* * Copyright 2021 HIMSA II K/S - www.himsa.com. Represented by EHIMA - * www.ehima.com * * 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. */ #include "state_machine.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include "bta_gatt_queue.h" #include "btm_iso_api.h" #include "btm_iso_api_types.h" #include "client_parser.h" #include "common/strings.h" #include "device_groups.h" #include "devices.h" #include "gatt_api.h" #include "hardware/bt_le_audio.h" #include "hci/hci_packets.h" #include "hci_error_code.h" #include "hcimsgs.h" #include "internal_include/bt_trace.h" #include "le_audio_health_status.h" #include "le_audio_log_history.h" #include "le_audio_types.h" #include "os/logging/log_adapter.h" #include "osi/include/alarm.h" #include "osi/include/osi.h" #include "osi/include/properties.h" #include "stack/include/btm_client_interface.h" #include "types/bt_transport.h" #include "types/raw_address.h" #ifdef TARGET_FLOSS #include #else #include #endif // TARGET_FLOSS // clang-format off /* ASCS state machine 1.0 * * State machine manages group of ASEs to make transition from one state to * another according to specification and keeping involved necessary externals * like: ISO, CIG, ISO data path, audio path form/to upper layer. * * GroupStream (API): GroupStream method of this le audio implementation class * object should allow transition from Idle (No Caching), * Codec Configured (Caching after release) state to * Streaming for all ASEs in group within time limit. Time * limit should keep safe whole state machine from being * stucked in any in-middle state, which is not a destination * state. * * TODO Second functionality of streaming should be switch * context which will base on previous state, context type. * * GroupStop (API): GroupStop method of this le audio implementation class * object should allow safe transition from any state to Idle * or Codec Configured (if caching supported). * * ╔══════════════════╦═════════════════════════════╦══════════════╦══════════════════╦══════╗ * ║ Current State ║ ASE Control Point Operation ║ Result ║ Next State ║ Note ║ * ╠══════════════════╬═════════════════════════════╬══════════════╬══════════════════╬══════╣ * ║ Idle ║ Config Codec ║ Success ║ Codec Configured ║ + ║ * ║ Codec Configured ║ Config Codec ║ Success ║ Codec Configured ║ - ║ * ║ Codec Configured ║ Release ║ Success ║ Releasing ║ + ║ * ║ Codec Configured ║ Config QoS ║ Success ║ QoS Configured ║ + ║ * ║ QoS Configured ║ Config Codec ║ Success ║ Codec Configured ║ - ║ * ║ QoS Configured ║ Config QoS ║ Success ║ QoS Configured ║ - ║ * ║ QoS Configured ║ Release ║ Success ║ Releasing ║ + ║ * ║ QoS Configured ║ Enable ║ Success ║ Enabling ║ + ║ * ║ Enabling ║ Release ║ Success ║ Releasing ║ + ║ * ║ Enabling ║ Update Metadata ║ Success ║ Enabling ║ - ║ * ║ Enabling ║ Disable ║ Success ║ Disabling ║ - ║ * ║ Enabling ║ Receiver Start Ready ║ Success ║ Streaming ║ + ║ * ║ Streaming ║ Update Metadata ║ Success ║ Streaming ║ - ║ * ║ Streaming ║ Disable ║ Success ║ Disabling ║ + ║ * ║ Streaming ║ Release ║ Success ║ Releasing ║ + ║ * ║ Disabling ║ Receiver Stop Ready ║ Success ║ QoS Configured ║ + ║ * ║ Disabling ║ Release ║ Success ║ Releasing ║ + ║ * ║ Releasing ║ Released (no caching) ║ Success ║ Idle ║ + ║ * ║ Releasing ║ Released (caching) ║ Success ║ Codec Configured ║ - ║ * ╚══════════════════╩═════════════════════════════╩══════════════╩══════════════════╩══════╝ * * + - supported transition * - - not supported */ // clang-format on using bluetooth::common::ToString; using bluetooth::hci::IsoManager; using bluetooth::le_audio::GroupStreamStatus; using bluetooth::le_audio::LeAudioDevice; using bluetooth::le_audio::LeAudioDeviceGroup; using bluetooth::le_audio::LeAudioGroupStateMachine; using bluetooth::hci::ErrorCode; using bluetooth::hci::ErrorCodeText; using bluetooth::le_audio::DsaMode; using bluetooth::le_audio::DsaModes; using bluetooth::le_audio::types::ase; using bluetooth::le_audio::types::AseState; using bluetooth::le_audio::types::AudioContexts; using bluetooth::le_audio::types::BidirectionalPair; using bluetooth::le_audio::types::CigState; using bluetooth::le_audio::types::CisState; using bluetooth::le_audio::types::DataPathState; using bluetooth::le_audio::types::LeAudioContextType; namespace { using namespace bluetooth; constexpr int linkQualityCheckInterval = 4000; constexpr int kAutonomousTransitionTimeoutMs = 5000; constexpr int kNumberOfCisRetries = 2; static void link_quality_cb(void* data) { // very ugly, but we need to pass just two bytes uint16_t cis_conn_handle = *((uint16_t*)data); IsoManager::GetInstance()->ReadIsoLinkQuality(cis_conn_handle); } class LeAudioGroupStateMachineImpl; LeAudioGroupStateMachineImpl* instance; class LeAudioGroupStateMachineImpl : public LeAudioGroupStateMachine { public: LeAudioGroupStateMachineImpl(Callbacks* state_machine_callbacks) : state_machine_callbacks_(state_machine_callbacks), watchdog_(alarm_new("LeAudioStateMachineTimer")) { log_history_ = LeAudioLogHistory::Get(); } ~LeAudioGroupStateMachineImpl() { alarm_free(watchdog_); watchdog_ = nullptr; log_history_->Cleanup(); log_history_ = nullptr; } bool AttachToStream(LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice, BidirectionalPair> ccids) override { log::info("group id: {} device: {}", group->group_id_, leAudioDevice->address_); /* This function is used to attach the device to the stream. * Limitation here is that device should be previously in the streaming * group and just got reconnected. */ if (group->GetState() != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING || group->GetTargetState() != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { log::error("Group {} is not streaming or is in transition, state: {}, target state: {}", group->group_id_, ToString(group->GetState()), ToString(group->GetTargetState())); return false; } /* This is cautious - mostly needed for unit test only */ auto group_metadata_contexts = get_bidirectional(group->GetMetadataContexts()); auto device_available_contexts = leAudioDevice->GetAvailableContexts(); if (!group_metadata_contexts.test_any(device_available_contexts)) { log::info("{} does is not have required context type", leAudioDevice->address_); return false; } /* If remote device is in QoS state, go to enabling state. */ if (leAudioDevice->HaveActiveAse() && leAudioDevice->HaveAllActiveAsesSameState( AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED)) { log::info("{} in QoS state, proceed to Enable state", leAudioDevice->address_); PrepareAndSendEnable(leAudioDevice); return true; } /* Invalidate configuration to make sure it is chosen properly when new * member connects */ group->InvalidateCachedConfigurations(); if (!group->Configure(group->GetConfigurationContextType(), group->GetMetadataContexts(), ccids)) { log::error("failed to set ASE configuration"); return false; } PrepareAndSendCodecConfigure(group, leAudioDevice); return true; } bool StartStream(LeAudioDeviceGroup* group, LeAudioContextType context_type, const BidirectionalPair& metadata_context_types, BidirectionalPair> ccid_lists) override { log::info("current state: {}", ToString(group->GetState())); switch (group->GetState()) { case AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED: if (group->IsConfiguredForContext(context_type)) { if (group->Activate(context_type, metadata_context_types, ccid_lists)) { SetTargetState(group, AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING); if (CigCreate(group)) { return true; } } log::info("Could not activate device, try to configure it again"); } /* Deactivate previousely activated ASEs in case if there were just a * reconfiguration (group target state as CODEC CONFIGURED) and no * deactivation. Currently activated ASEs cannot be used for different * context. */ group->Deactivate(); /* We are going to reconfigure whole group. Clear Cises.*/ ReleaseCisIds(group); /* If configuration is needed */ [[fallthrough]]; case AseState::BTA_LE_AUDIO_ASE_STATE_IDLE: if (!group->Configure(context_type, metadata_context_types, ccid_lists)) { log::error("failed to set ASE configuration"); return false; } group->cig.GenerateCisIds(context_type); /* All ASEs should aim to achieve target state */ SetTargetState(group, AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING); if (!PrepareAndSendCodecConfigToTheGroup(group)) { group->PrintDebugState(); ClearGroup(group, true); } break; case AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED: { LeAudioDevice* leAudioDevice = group->GetFirstActiveDevice(); if (!leAudioDevice) { group->PrintDebugState(); log::error("group_id: {} has no active devices", group->group_id_); return false; } if (!group->IsConfiguredForContext(context_type)) { if (group->GetConfigurationContextType() == context_type) { log::info( "Looks like another device connected in the meantime to group_id: {}, try to " "reconfigure.", group->group_id_); if (group->Configure(context_type, metadata_context_types, ccid_lists)) { return PrepareAndSendCodecConfigToTheGroup(group); } } log::error("Trying to start stream not configured for the context {} in group_id: {} ", ToString(context_type), group->group_id_); group->PrintDebugState(); StopStream(group); return false; } /* All ASEs should aim to achieve target state */ SetTargetState(group, AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING); PrepareAndSendEnableToTheGroup(group); break; } case AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING: { /* This case just updates the metadata for the stream, in case * stream configuration is satisfied. We can do that already for * all the devices in a group, without any state transitions. */ if (!group->IsMetadataChanged(metadata_context_types, ccid_lists)) { return true; } LeAudioDevice* leAudioDevice = group->GetFirstActiveDevice(); if (!leAudioDevice) { log::error("group has no active devices"); return false; } while (leAudioDevice) { PrepareAndSendUpdateMetadata(leAudioDevice, metadata_context_types, ccid_lists); leAudioDevice = group->GetNextActiveDevice(leAudioDevice); } break; } default: log::error("Unable to transit from {}", ToString(group->GetState())); return false; } return true; } bool ConfigureStream(LeAudioDeviceGroup* group, LeAudioContextType context_type, const BidirectionalPair& metadata_context_types, BidirectionalPair> ccid_lists, bool configure_qos) override { if (group->GetState() > AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED) { log::error("Stream should be stopped or in configured stream. Current state: {}", ToString(group->GetState())); return false; } if (configure_qos) { if (group->IsConfiguredForContext(context_type)) { if (group->Activate(context_type, metadata_context_types, ccid_lists)) { SetTargetState(group, AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); if (CigCreate(group)) { return true; } } } log::info("Could not activate device, try to configure it again"); } group->Deactivate(); ReleaseCisIds(group); if (!group->Configure(context_type, metadata_context_types, ccid_lists)) { log::error("Could not configure ASEs for group {} content type {}", group->group_id_, int(context_type)); return false; } group->cig.GenerateCisIds(context_type); if (configure_qos) { SetTargetState(group, AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); } else { SetTargetState(group, AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED); } return PrepareAndSendCodecConfigToTheGroup(group); } void SuspendStream(LeAudioDeviceGroup* group) override { /* All ASEs should aim to achieve target state */ SetTargetState(group, AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); auto status = PrepareAndSendDisableToTheGroup(group); state_machine_callbacks_->StatusReportCb(group->group_id_, status); } void StopStream(LeAudioDeviceGroup* group) override { if (group->IsReleasingOrIdle()) { log::info("group: {} in_transition: {}, current_state {}", group->group_id_, group->IsInTransition(), ToString(group->GetState())); return; } /* All Ases should aim to achieve target state */ SetTargetState(group, AseState::BTA_LE_AUDIO_ASE_STATE_IDLE); auto status = PrepareAndSendReleaseToTheGroup(group); state_machine_callbacks_->StatusReportCb(group->group_id_, status); } void notifyLeAudioHealth(LeAudioDeviceGroup* group, bluetooth::le_audio::LeAudioHealthGroupStatType stat) { auto leAudioHealthStatus = bluetooth::le_audio::LeAudioHealthStatus::Get(); if (leAudioHealthStatus) { leAudioHealthStatus->AddStatisticForGroup(group, stat); } } void ProcessGattCtpNotification(LeAudioDeviceGroup* group, uint8_t* value, uint16_t len) { auto ntf = std::make_unique(); bool valid_notification = ParseAseCtpNotification(*ntf, len, value); if (group == nullptr) { log::warn("Notification received to invalid group"); return; } /* State machine looks on ASE state and base on it take decisions. * If ASE state is not achieve on time, timeout is reported and upper * layer mostlikely drops ACL considers that remote is in bad state. * However, it might happen that remote device rejects ASE configuration for * some reason and ASCS specification defines tones of different reasons. * Maybe in the future we will be able to handle all of them but for now it * seems to be important to allow remote device to reject ASE configuration * when stream is creating. e.g. Allow remote to reject Enable on unwanted * context type. */ auto target_state = group->GetTargetState(); auto in_transition = group->IsInTransition(); if (!in_transition || target_state != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { log::debug("Not interested in ctp result for group {} inTransition: {} , targetState: {}", group->group_id_, in_transition, ToString(target_state)); return; } if (!valid_notification) { /* Do nothing, just allow guard timer to fire */ log::error("Invalid CTP notification for group {}", group->group_id_); return; } for (auto& entry : ntf->entries) { if (entry.response_code != bluetooth::le_audio::client_parser::ascs::kCtpResponseCodeSuccess) { /* Gracefully stop the stream */ log::error( "Stopping stream due to control point error for ase: {}, error: " "0x{:02x}, reason: 0x{:02x}", entry.ase_id, entry.response_code, entry.reason); notifyLeAudioHealth( group, bluetooth::le_audio::LeAudioHealthGroupStatType::STREAM_CREATE_SIGNALING_FAILED); StopStream(group); return; } } log::debug("Ctp result OK for group {} inTransition: {} , targetState: {}", group->group_id_, in_transition, ToString(target_state)); } void ProcessGattNotifEvent(uint8_t* value, uint16_t len, struct ase* ase, LeAudioDevice* leAudioDevice, LeAudioDeviceGroup* group) override { struct bluetooth::le_audio::client_parser::ascs::ase_rsp_hdr arh; ParseAseStatusHeader(arh, len, value); if (ase->id == 0x00) { /* Initial state of Ase - update id */ log::info(", discovered ase id: {}", arh.id); ase->id = arh.id; } auto state = static_cast(arh.state); log::info("{} , ASE id: {}, state changed {} -> {}", leAudioDevice->address_, ase->id, ToString(ase->state), ToString(state)); log_history_->AddLogHistory(kLogAseStateNotif, leAudioDevice->group_id_, leAudioDevice->address_, "ASE_ID " + std::to_string(arh.id) + ": " + ToString(state), "curr: " + ToString(ase->state)); switch (state) { case AseState::BTA_LE_AUDIO_ASE_STATE_IDLE: AseStateMachineProcessIdle(arh, ase, group, leAudioDevice); break; case AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED: AseStateMachineProcessCodecConfigured( arh, ase, value + bluetooth::le_audio::client_parser::ascs::kAseRspHdrMinLen, len - bluetooth::le_audio::client_parser::ascs::kAseRspHdrMinLen, group, leAudioDevice); break; case AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED: AseStateMachineProcessQosConfigured(arh, ase, group, leAudioDevice); break; case AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING: AseStateMachineProcessEnabling(arh, ase, group, leAudioDevice); break; case AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING: AseStateMachineProcessStreaming( arh, ase, value + bluetooth::le_audio::client_parser::ascs::kAseRspHdrMinLen, len - bluetooth::le_audio::client_parser::ascs::kAseRspHdrMinLen, group, leAudioDevice); break; case AseState::BTA_LE_AUDIO_ASE_STATE_DISABLING: AseStateMachineProcessDisabling(arh, ase, group, leAudioDevice); break; case AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING: AseStateMachineProcessReleasing(arh, ase, group, leAudioDevice); break; default: log::error("Wrong AES status: {}", static_cast(arh.state)); StopStream(group); break; } } void ProcessHciNotifOnCigCreate(LeAudioDeviceGroup* group, uint8_t status, uint8_t /*cig_id*/, std::vector conn_handles) override { /* TODO: What if not all cises will be configured ? * conn_handle.size() != active ases in group */ if (!group) { log::error(", group is null"); return; } log_history_->AddLogHistory(kLogHciEvent, group->group_id_, RawAddress::kEmpty, kLogCisCreateOp + "STATUS=" + loghex(status)); if (status != HCI_SUCCESS) { if (status == HCI_ERR_COMMAND_DISALLOWED) { /* * We are here, because stack has no chance to remove CIG when it was * shut during streaming. In the same time, controller probably was not * Reseted, which creates the issue. Lets remove CIG and try to create * it again. */ group->cig.SetState(CigState::RECOVERING); IsoManager::GetInstance()->RemoveCig(group->group_id_, true); return; } group->cig.SetState(CigState::NONE); log::error(", failed to create CIG, reason: 0x{:02x}, new cig state: {}", status, ToString(group->cig.GetState())); StopStream(group); return; } log::assert_that(group->cig.GetState() == CigState::CREATING, "Unexpected CIG creation group id: {}, cig state: {}", group->group_id_, ToString(group->cig.GetState())); group->cig.SetState(CigState::CREATED); log::info("Group: {}, id: {} cig state: {}, number of cis handles: {}", std::format_ptr(group), group->group_id_, ToString(group->cig.GetState()), static_cast(conn_handles.size())); if (group->GetTargetState() != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING && group->GetTargetState() != AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED) { /* Group is not going to stream. It happen while CIG was creating. * Remove CIG in such a case */ log::warn("group_id {} is not going to stream anymore. Remove CIG.", group->group_id_); group->PrintDebugState(); RemoveCigForGroup(group); return; } /* Assign all connection handles to CIS ids of the CIG */ group->cig.AssignCisConnHandles(conn_handles); /* Assign all connection handles to multiple device ASEs */ group->AssignCisConnHandlesToAses(); PrepareAndSendQoSToTheGroup(group); } void FreeLinkQualityReports(LeAudioDevice* leAudioDevice) { if (leAudioDevice->link_quality_timer == nullptr) { return; } alarm_free(leAudioDevice->link_quality_timer); leAudioDevice->link_quality_timer = nullptr; } void ProcessHciNotifyOnCigRemoveRecovering(uint8_t status, LeAudioDeviceGroup* group) { group->cig.SetState(CigState::NONE); log_history_->AddLogHistory(kLogHciEvent, group->group_id_, RawAddress::kEmpty, kLogCigRemoveOp + " STATUS=" + loghex(status)); if (status != HCI_SUCCESS) { log::error( "Could not recover from the COMMAND DISALLOAD on CigCreate. Status " "on CIG remove is 0x{:02x}", status); StopStream(group); return; } log::info("Succeed on CIG Recover - back to creating CIG"); if (!CigCreate(group)) { log::error("Could not create CIG. Stop the stream for group {}", group->group_id_); StopStream(group); } } void ProcessHciNotifOnCigRemove(uint8_t status, LeAudioDeviceGroup* group) override { if (group->cig.GetState() == CigState::RECOVERING) { ProcessHciNotifyOnCigRemoveRecovering(status, group); return; } log_history_->AddLogHistory(kLogHciEvent, group->group_id_, RawAddress::kEmpty, kLogCigRemoveOp + " STATUS=" + loghex(status)); if (status != HCI_SUCCESS) { group->cig.SetState(CigState::CREATED); log::error("failed to remove cig, id: {}, status 0x{:02x}, new cig state: {}", group->group_id_, status, ToString(group->cig.GetState())); return; } log::assert_that(group->cig.GetState() == CigState::REMOVING, "Unexpected CIG remove group id: {}, cig state {}", group->group_id_, ToString(group->cig.GetState())); group->cig.SetState(CigState::NONE); LeAudioDevice* leAudioDevice = group->GetFirstDevice(); if (!leAudioDevice) { return; } do { FreeLinkQualityReports(leAudioDevice); for (auto& ase : leAudioDevice->ases_) { ase.cis_state = CisState::IDLE; ase.data_path_state = DataPathState::IDLE; } } while ((leAudioDevice = group->GetNextDevice(leAudioDevice))); } void ProcessHciNotifSetupIsoDataPath(LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice, uint8_t status, uint16_t conn_handle) override { log_history_->AddLogHistory( kLogHciEvent, group->group_id_, leAudioDevice->address_, kLogSetDataPathOp + "cis_h:" + loghex(conn_handle) + " STATUS=" + loghex(status)); if (status) { log::error("failed to setup data path"); StopStream(group); return; } if (com::android::bluetooth::flags::leaudio_dynamic_spatial_audio()) { if (group->dsa_.active && (group->dsa_.mode == DsaMode::ISO_SW || group->dsa_.mode == DsaMode::ISO_HW) && leAudioDevice->GetDsaDataPathState() == DataPathState::CONFIGURING) { log::info("Datapath configured for headtracking"); leAudioDevice->SetDsaDataPathState(DataPathState::CONFIGURED); return; } } /* Update state for the given cis.*/ auto ase = leAudioDevice->GetFirstActiveAseByCisAndDataPathState(CisState::CONNECTED, DataPathState::CONFIGURING); if (!ase || ase->cis_conn_hdl != conn_handle) { log::error("Cannot find ase by handle {}", conn_handle); return; } ase->data_path_state = DataPathState::CONFIGURED; if (group->GetTargetState() != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { log::warn("Group {} is not targeting streaming state any more", group->group_id_); return; } AddCisToStreamConfiguration(group, ase); if (group->GetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING && !group->GetFirstActiveDeviceByCisAndDataPathState(CisState::CONNECTED, DataPathState::IDLE)) { /* No more transition for group. Here we are for the late join device * scenario */ cancel_watchdog_if_needed(group->group_id_); } if (group->GetNotifyStreamingWhenCisesAreReadyFlag() && group->IsGroupStreamReady()) { group->SetNotifyStreamingWhenCisesAreReadyFlag(false); log::info("Ready to notify Group Streaming."); cancel_watchdog_if_needed(group->group_id_); if (group->GetState() != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING); } state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::STREAMING); }; } void ProcessHciNotifRemoveIsoDataPath(LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice, uint8_t status, uint16_t conn_hdl) override { log_history_->AddLogHistory(kLogHciEvent, group->group_id_, leAudioDevice->address_, kLogRemoveDataPathOp + "STATUS=" + loghex(status)); if (status != HCI_SUCCESS) { log::error("failed to remove ISO data path, reason: 0x{:0x} - continuing stream closing", status); /* Just continue - disconnecting CIS removes data path as well.*/ } bool do_disconnect = false; auto ases_pair = leAudioDevice->GetAsesByCisConnHdl(conn_hdl); if (ases_pair.sink && (ases_pair.sink->data_path_state == DataPathState::REMOVING)) { ases_pair.sink->data_path_state = DataPathState::IDLE; if (ases_pair.sink->cis_state == CisState::CONNECTED) { ases_pair.sink->cis_state = CisState::DISCONNECTING; do_disconnect = true; } } if (ases_pair.source && (ases_pair.source->data_path_state == DataPathState::REMOVING)) { ases_pair.source->data_path_state = DataPathState::IDLE; if (ases_pair.source->cis_state == CisState::CONNECTED) { ases_pair.source->cis_state = CisState::DISCONNECTING; do_disconnect = true; } } else if (com::android::bluetooth::flags::leaudio_dynamic_spatial_audio()) { if (group->dsa_.active && leAudioDevice->GetDsaDataPathState() == DataPathState::REMOVING) { log::info("DSA data path removed"); leAudioDevice->SetDsaDataPathState(DataPathState::IDLE); leAudioDevice->SetDsaCisHandle(LE_AUDIO_INVALID_CIS_HANDLE); } } if (do_disconnect) { group->RemoveCisFromStreamIfNeeded(leAudioDevice, conn_hdl); IsoManager::GetInstance()->DisconnectCis(conn_hdl, HCI_ERR_PEER_USER); log_history_->AddLogHistory(kLogStateMachineTag, group->group_id_, leAudioDevice->address_, kLogCisDisconnectOp + "cis_h:" + loghex(conn_hdl)); } } void ProcessHciNotifIsoLinkQualityRead(LeAudioDeviceGroup* /*group*/, LeAudioDevice* /*leAudioDevice*/, uint8_t conn_handle, uint32_t txUnackedPackets, uint32_t txFlushedPackets, uint32_t txLastSubeventPackets, uint32_t retransmittedPackets, uint32_t crcErrorPackets, uint32_t rxUnreceivedPackets, uint32_t duplicatePackets) { log::info( "conn_handle: 0x{:x}, txUnackedPackets: 0x{:x}, txFlushedPackets: " "0x{:x}, txLastSubeventPackets: 0x{:x}, retransmittedPackets: 0x{:x}, " "crcErrorPackets: 0x{:x}, rxUnreceivedPackets: 0x{:x}, " "duplicatePackets: 0x{:x}", conn_handle, txUnackedPackets, txFlushedPackets, txLastSubeventPackets, retransmittedPackets, crcErrorPackets, rxUnreceivedPackets, duplicatePackets); } void ReleaseCisIds(LeAudioDeviceGroup* group) { if (group == nullptr) { log::debug("Group is null."); return; } log::debug("Releasing CIS is for group {}", group->group_id_); LeAudioDevice* leAudioDevice = group->GetFirstDevice(); while (leAudioDevice != nullptr) { for (auto& ase : leAudioDevice->ases_) { ase.cis_id = bluetooth::le_audio::kInvalidCisId; ase.cis_conn_hdl = bluetooth::le_audio::kInvalidCisConnHandle; } leAudioDevice = group->GetNextDevice(leAudioDevice); } group->ClearAllCises(); } void SendStreamingStatusCbIfNeeded(LeAudioDeviceGroup* group) { /* This function should be called when some of the set members got disconnected but there are * still other CISes connected. When state machine is in STREAMING state, status will be sent up * to the user, so it can update encoder or offloader. */ log::info("group_id: {}", group->group_id_); if (group->HaveAllCisesDisconnected()) { log::info("All cises disconnected;"); return; } if ((group->GetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) && (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING)) { state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::STREAMING); } else { log::warn("group_id {} not in streaming, CISes are still there", group->group_id_); group->PrintDebugState(); } } void RemoveCigForGroup(LeAudioDeviceGroup* group) { log::debug("Group: {}, id: {} cig state: {}", std::format_ptr(group), group->group_id_, ToString(group->cig.GetState())); if (group->cig.GetState() != CigState::CREATED) { log::warn("Group: {}, id: {} cig state: {} cannot be removed", std::format_ptr(group), group->group_id_, ToString(group->cig.GetState())); return; } group->cig.SetState(CigState::REMOVING); IsoManager::GetInstance()->RemoveCig(group->group_id_); log::debug("Group: {}, id: {} cig state: {}", std::format_ptr(group), group->group_id_, ToString(group->cig.GetState())); log_history_->AddLogHistory(kLogStateMachineTag, group->group_id_, RawAddress::kEmpty, kLogCigRemoveOp); } void ProcessHciNotifAclDisconnected(LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice) { FreeLinkQualityReports(leAudioDevice); if (!group) { log::error("group is null for device: {} group_id: {}", leAudioDevice->address_, leAudioDevice->group_id_); /* mark ASEs as not used. */ leAudioDevice->DeactivateAllAses(); return; } /* It is possible that ACL disconnection came before CIS disconnect event */ for (auto& ase : leAudioDevice->ases_) { if (ase.data_path_state == DataPathState::CONFIGURED || ase.data_path_state == DataPathState::CONFIGURING) { RemoveDataPathByCisHandle(leAudioDevice, ase.cis_conn_hdl); } group->RemoveCisFromStreamIfNeeded(leAudioDevice, ase.cis_conn_hdl); } /* mark ASEs as not used. */ leAudioDevice->DeactivateAllAses(); /* Update the current group audio context availability which could change * due to disconnected group member. */ group->ReloadAudioLocations(); group->ReloadAudioDirections(); group->UpdateAudioContextAvailability(); group->InvalidateCachedConfigurations(); group->InvalidateGroupStrategy(); /* If group is in Idle and not transitioning, update the current group * audio context availability which could change due to disconnected group * member. */ if ((group->GetState() == AseState::BTA_LE_AUDIO_ASE_STATE_IDLE) && !group->IsInTransition()) { log::info("group: {} is in IDLE", group->group_id_); /* When OnLeAudioDeviceSetStateTimeout happens, group will transition * to IDLE, and after that an ACL disconnect will be triggered. We need * to check if CIG is created and if it is, remove it so it can be created * again after reconnect. Otherwise we will get Command Disallowed on CIG * Create when starting stream. */ if (group->cig.GetState() == CigState::CREATED) { log::info("CIG is in CREATED state so removing CIG for Group {}", group->group_id_); RemoveCigForGroup(group); } return; } log::debug("device: {}, group connected: {}, all active ase disconnected:: {}", leAudioDevice->address_, group->IsAnyDeviceConnected(), group->HaveAllCisesDisconnected()); if (group->IsAnyDeviceConnected()) { /* * ACL of one of the device has been dropped. If number of CISes has * changed notify upper layer so the CodecManager can be updated with CIS * information. */ if (!group->HaveAllCisesDisconnected()) { /* some CISes are connected */ SendStreamingStatusCbIfNeeded(group); return; } if (!group->IsInTransitionTo(AseState::BTA_LE_AUDIO_ASE_STATE_IDLE)) { /* do nothing if not transitioning to IDLE */ return; } } /* Group is not connected and all the CISes are down. * Clean states and destroy HCI group */ log::debug("Clearing inactive group"); ClearGroup(group, true); } void cancel_watchdog_if_needed(int group_id) { if (alarm_is_scheduled(watchdog_)) { log_history_->AddLogHistory(kLogStateMachineTag, group_id, RawAddress::kEmpty, "WATCHDOG STOPPED"); alarm_cancel(watchdog_); } } void applyDsaDataPath(LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice, uint16_t conn_hdl) { if (!com::android::bluetooth::flags::leaudio_dynamic_spatial_audio()) { return; } if (!group->dsa_.active) { log::info("DSA mode not used"); return; } DsaModes dsa_modes = leAudioDevice->GetDsaModes(); if (dsa_modes.empty()) { log::warn("DSA mode not supported by this LE Audio device: {}", leAudioDevice->address_); group->dsa_.active = false; return; } if (std::find(dsa_modes.begin(), dsa_modes.end(), DsaMode::ISO_SW) == dsa_modes.end() && std::find(dsa_modes.begin(), dsa_modes.end(), DsaMode::ISO_HW) == dsa_modes.end()) { log::warn("DSA mode not supported by this LE Audio device: {}", leAudioDevice->address_); group->dsa_.active = false; return; } uint8_t data_path_id = bluetooth::hci::iso_manager::kIsoDataPathHci; log::info("DSA mode used: {}", static_cast(group->dsa_.mode)); switch (group->dsa_.mode) { case DsaMode::ISO_HW: data_path_id = bluetooth::hci::iso_manager::kIsoDataPathPlatformDefault; break; case DsaMode::ISO_SW: data_path_id = bluetooth::hci::iso_manager::kIsoDataPathHci; break; default: log::warn("Unexpected DsaMode: {}", static_cast(group->dsa_.mode)); group->dsa_.active = false; return; } leAudioDevice->SetDsaDataPathState(DataPathState::CONFIGURING); leAudioDevice->SetDsaCisHandle(conn_hdl); log::verbose("DSA mode supported on this LE Audio device: {}, apply data path: {}", leAudioDevice->address_, data_path_id); LeAudioLogHistory::Get()->AddLogHistory( kLogStateMachineTag, group->group_id_, RawAddress::kEmpty, kLogSetDataPathOp + "cis_h:" + loghex(conn_hdl), "direction: " + loghex(bluetooth::hci::iso_manager::kIsoDataPathDirectionOut)); bluetooth::hci::iso_manager::iso_data_path_params param = { .data_path_dir = bluetooth::hci::iso_manager::kIsoDataPathDirectionOut, .data_path_id = data_path_id, .codec_id_format = bluetooth::le_audio::types::kLeAudioCodecHeadtracking.coding_format, .codec_id_company = bluetooth::le_audio::types::kLeAudioCodecHeadtracking.vendor_company_id, .codec_id_vendor = bluetooth::le_audio::types::kLeAudioCodecHeadtracking.vendor_codec_id, .controller_delay = 0x00000000, .codec_conf = std::vector(), }; IsoManager::GetInstance()->SetupIsoDataPath(conn_hdl, std::move(param)); } void ProcessHciNotifCisEstablished( LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice, const bluetooth::hci::iso_manager::cis_establish_cmpl_evt* event) override { auto ases_pair = leAudioDevice->GetAsesByCisConnHdl(event->cis_conn_hdl); log_history_->AddLogHistory(kLogHciEvent, group->group_id_, leAudioDevice->address_, kLogCisEstablishedOp + "cis_h:" + loghex(event->cis_conn_hdl) + " STATUS=" + loghex(event->status)); if (event->status != HCI_SUCCESS) { if (ases_pair.sink) { ases_pair.sink->cis_state = CisState::ASSIGNED; } if (ases_pair.source) { ases_pair.source->cis_state = CisState::ASSIGNED; } log::warn("{}: failed to create CIS 0x{:04x}, status: {} (0x{:02x})", leAudioDevice->address_, event->cis_conn_hdl, ErrorCodeText((ErrorCode)event->status), event->status); if (event->status == HCI_ERR_CONN_FAILED_ESTABLISHMENT && ((leAudioDevice->cis_failed_to_be_established_retry_cnt_++) < kNumberOfCisRetries) && (CisCreateForDevice(group, leAudioDevice))) { log::info("Retrying ({}) to create CIS for {}", leAudioDevice->cis_failed_to_be_established_retry_cnt_, leAudioDevice->address_); return; } if (event->status == HCI_ERR_UNSUPPORTED_REM_FEATURE && group->asymmetric_phy_for_unidirectional_cis_supported == true && group->GetSduInterval(bluetooth::le_audio::types::kLeAudioDirectionSource) == 0) { log::info( "Remote device may not support asymmetric phy for CIS, retry " "symmetric setting again"); group->asymmetric_phy_for_unidirectional_cis_supported = false; } log::error("CIS creation failed {} times, stopping the stream", leAudioDevice->cis_failed_to_be_established_retry_cnt_); leAudioDevice->cis_failed_to_be_established_retry_cnt_ = 0; /* CIS establishment failed. Remove CIG if no other CIS is already created * or pending. If CIS is established, this will be handled in disconnected * complete event */ if (group->HaveAllCisesDisconnected()) { RemoveCigForGroup(group); } StopStream(group); return; } if (leAudioDevice->cis_failed_to_be_established_retry_cnt_ > 0) { /* Reset retry counter */ leAudioDevice->cis_failed_to_be_established_retry_cnt_ = 0; } if (group->GetTargetState() != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { log::error("Unintended CIS establishement event came for group id: {}", group->group_id_); StopStream(group); return; } if (ases_pair.sink) { ases_pair.sink->cis_state = CisState::CONNECTED; } if (ases_pair.source) { ases_pair.source->cis_state = CisState::CONNECTED; } if (ases_pair.sink && (ases_pair.sink->data_path_state == DataPathState::IDLE)) { PrepareDataPath(group->group_id_, ases_pair.sink); } if (ases_pair.source && (ases_pair.source->data_path_state == DataPathState::IDLE)) { PrepareDataPath(group->group_id_, ases_pair.source); } else { applyDsaDataPath(group, leAudioDevice, event->cis_conn_hdl); } if (osi_property_get_bool("persist.bluetooth.iso_link_quality_report", false)) { leAudioDevice->link_quality_timer = alarm_new_periodic("le_audio_cis_link_quality"); leAudioDevice->link_quality_timer_data = event->cis_conn_hdl; alarm_set_on_mloop(leAudioDevice->link_quality_timer, linkQualityCheckInterval, link_quality_cb, &leAudioDevice->link_quality_timer_data); } if (!leAudioDevice->HaveAllActiveAsesCisEst()) { /* More cis established events has to come */ return; } if (!leAudioDevice->IsReadyToCreateStream()) { /* Device still remains in ready to create stream state. It means that * more enabling status notifications has to come. This may only happen * for reconnection scenario for bi-directional CIS. */ return; } /* All CISes created. Send start ready for source ASE before we can go * to streaming state. */ struct ase* ase = leAudioDevice->GetFirstActiveAse(); log::assert_that(ase != nullptr, "shouldn't be called without an active ASE, device {}, " "group id: {}, cis handle 0x{:04x}", ADDRESS_TO_LOGGABLE_CSTR(leAudioDevice->address_), event->cig_id, event->cis_conn_hdl); PrepareAndSendReceiverStartReady(leAudioDevice, ase); } static void WriteToControlPoint(LeAudioDevice* leAudioDevice, std::vector value) { tGATT_WRITE_TYPE write_type = GATT_WRITE_NO_RSP; if (value.size() > (leAudioDevice->mtu_ - 3)) { log::warn("{}, using long write procedure ({} > {})", leAudioDevice->address_, static_cast(value.size()), leAudioDevice->mtu_ - 3); /* Note, that this type is actually LONG WRITE. * Meaning all the Prepare Writes plus Execute is handled in the stack */ write_type = GATT_WRITE_PREPARE; } BtaGattQueue::WriteCharacteristic(leAudioDevice->conn_id_, leAudioDevice->ctp_hdls_.val_hdl, value, write_type, NULL, NULL); } static void RemoveDataPathByCisHandle(LeAudioDevice* leAudioDevice, uint16_t cis_conn_hdl) { auto ases_pair = leAudioDevice->GetAsesByCisConnHdl(cis_conn_hdl); uint8_t value = 0; if (ases_pair.sink && ases_pair.sink->data_path_state == DataPathState::CONFIGURED) { value |= bluetooth::hci::iso_manager::kRemoveIsoDataPathDirectionInput; ases_pair.sink->data_path_state = DataPathState::REMOVING; } if (ases_pair.source && ases_pair.source->data_path_state == DataPathState::CONFIGURED) { value |= bluetooth::hci::iso_manager::kRemoveIsoDataPathDirectionOutput; ases_pair.source->data_path_state = DataPathState::REMOVING; } else { if (com::android::bluetooth::flags::leaudio_dynamic_spatial_audio()) { if (leAudioDevice->GetDsaDataPathState() == DataPathState::CONFIGURED) { value |= bluetooth::hci::iso_manager::kRemoveIsoDataPathDirectionOutput; leAudioDevice->SetDsaDataPathState(DataPathState::REMOVING); } } } if (value == 0) { log::info("Data path was not set. Nothing to do here."); return; } IsoManager::GetInstance()->RemoveIsoDataPath(cis_conn_hdl, value); LeAudioLogHistory::Get()->AddLogHistory( kLogStateMachineTag, leAudioDevice->group_id_, leAudioDevice->address_, kLogRemoveDataPathOp + " cis_h:" + loghex(cis_conn_hdl)); } void ProcessHciNotifCisDisconnected( LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice, const bluetooth::hci::iso_manager::cis_disconnected_evt* event) override { /* Reset the disconnected CIS states */ FreeLinkQualityReports(leAudioDevice); auto ases_pair = leAudioDevice->GetAsesByCisConnHdl(event->cis_conn_hdl); log_history_->AddLogHistory(kLogHciEvent, group->group_id_, leAudioDevice->address_, kLogCisDisconnectedOp + "cis_h:" + loghex(event->cis_conn_hdl) + " REASON=" + loghex(event->reason)); if (ases_pair.sink) { ases_pair.sink->cis_state = CisState::ASSIGNED; } if (ases_pair.source) { ases_pair.source->cis_state = CisState::ASSIGNED; } RemoveDataPathByCisHandle(leAudioDevice, event->cis_conn_hdl); /* If this is peer disconnecting CIS, make sure to clear data path */ if (event->reason != HCI_ERR_CONN_CAUSE_LOCAL_HOST) { // Make sure we won't stay in STREAMING state if (ases_pair.sink && ases_pair.sink->state == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { SetAseState(leAudioDevice, ases_pair.sink, AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); } if (ases_pair.source && ases_pair.source->state == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { SetAseState(leAudioDevice, ases_pair.source, AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); } } group->RemoveCisFromStreamIfNeeded(leAudioDevice, event->cis_conn_hdl); auto target_state = group->GetTargetState(); log::info(" group id {}, state {}, target state {}", group->group_id_, bluetooth::common::ToString(group->GetState()), bluetooth::common::ToString(target_state)); switch (target_state) { case AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING: { /* Something wrong happen when streaming or when creating stream. * If there is other device connected and streaming, just leave it as it * is, otherwise stop the stream. */ if (!group->HaveAllCisesDisconnected()) { /* There is ASE streaming for some device. Continue streaming. */ SendStreamingStatusCbIfNeeded(group); log::warn("Group member disconnected during streaming. Cis handle 0x{:04x}", event->cis_conn_hdl); return; } /* CISes are disconnected, but it could be a case here, that there is * another set member trying to get STREAMING state. Can happen when * while streaming user switch buds. In such a case, lets try to allow * that device to continue */ LeAudioDevice* attaching_device = getDeviceTryingToAttachTheStream(group); if (attaching_device != nullptr) { /* There is a device willitng to stream. Let's wait for it to start * streaming */ auto active_ase = attaching_device->GetFirstActiveAse(); group->SetState(active_ase->state); /* this is just to start timer */ group->SetTargetState(AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING); log::info( "{} is still attaching to stream while other members got " "disconnected from the group_id: {}", attaching_device->address_, group->group_id_); return; } log::info("Lost all members from the group {}", group->group_id_); group->cig.cises.clear(); RemoveCigForGroup(group); group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_IDLE); group->SetTargetState(AseState::BTA_LE_AUDIO_ASE_STATE_IDLE); /* If there is no more ase to stream. Notify it is in IDLE. */ state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::IDLE); return; } case AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED: /* Intentional group disconnect has finished, but the last CIS in the * event came after the ASE notification. * If group is already suspended and all CIS are disconnected, we can * report SUSPENDED state. */ if ((group->GetState() == AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED) && group->HaveAllCisesDisconnected()) { /* No more transition for group */ cancel_watchdog_if_needed(group->group_id_); state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::SUSPENDED); return; } break; case AseState::BTA_LE_AUDIO_ASE_STATE_IDLE: case AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED: { /* Those two are used when closing the stream and CIS disconnection is * expected */ if (!group->HaveAllCisesDisconnected()) { log::debug("Still waiting for all CISes being disconnected for group:{}", group->group_id_); return; } auto current_group_state = group->GetState(); log::info("group {} current state: {}, target state: {}", group->group_id_, bluetooth::common::ToString(current_group_state), bluetooth::common::ToString(target_state)); /* It might happen that controller notified about CIS disconnection * later, after ASE state already changed. * In such an event, there is need to notify upper layer about state * from here. */ if (current_group_state == AseState::BTA_LE_AUDIO_ASE_STATE_IDLE) { cancel_watchdog_if_needed(group->group_id_); log::info("Cises disconnected for group {}, we are good in Idle state.", group->group_id_); ReleaseCisIds(group); state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::IDLE); } else if (current_group_state == AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED) { cancel_watchdog_if_needed(group->group_id_); auto reconfig = group->IsPendingConfiguration(); log::info( "Cises disconnected for group: {}, we are good in Configured " "state, reconfig={}.", group->group_id_, reconfig); /* This is Autonomous change if both, target and current state * is CODEC_CONFIGURED */ if (target_state == current_group_state) { state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::CONFIGURED_AUTONOMOUS); } } RemoveCigForGroup(group); } break; default: break; } /* We should send Receiver Stop Ready when acting as a source */ if (ases_pair.source && ases_pair.source->state == AseState::BTA_LE_AUDIO_ASE_STATE_DISABLING) { std::vector ids = {ases_pair.source->id}; std::vector value; bluetooth::le_audio::client_parser::ascs::PrepareAseCtpAudioReceiverStopReady(ids, value); WriteToControlPoint(leAudioDevice, value); log_history_->AddLogHistory( kLogControlPointCmd, leAudioDevice->group_id_, leAudioDevice->address_, kLogAseStopReadyOp + "ASE_ID " + std::to_string(ases_pair.source->id)); } /* Tear down CIS's data paths within the group */ struct ase* ase = leAudioDevice->GetFirstActiveAseByCisAndDataPathState( CisState::CONNECTED, DataPathState::CONFIGURED); if (!ase) { leAudioDevice = group->GetNextActiveDevice(leAudioDevice); /* No more ASEs to disconnect their CISes */ if (!leAudioDevice) { return; } ase = leAudioDevice->GetFirstActiveAse(); } log::assert_that(ase, "shouldn't be called without an active ASE"); if (ase->data_path_state == DataPathState::CONFIGURED) { RemoveDataPathByCisHandle(leAudioDevice, ase->cis_conn_hdl); } } private: static constexpr uint64_t kStateTransitionTimeoutMs = 3500; static constexpr char kStateTransitionTimeoutMsProp[] = "persist.bluetooth.leaudio.device.set.state.timeoutms"; Callbacks* state_machine_callbacks_; alarm_t* watchdog_; LeAudioLogHistory* log_history_; /* This callback is called on timeout during transition to target state */ void OnStateTransitionTimeout(int group_id) { log_history_->AddLogHistory(kLogStateMachineTag, group_id, RawAddress::kEmpty, "WATCHDOG FIRED"); state_machine_callbacks_->OnStateTransitionTimeout(group_id); } void SetTargetState(LeAudioDeviceGroup* group, AseState state) { auto current_state = ToString(group->GetTargetState()); auto new_state = ToString(state); log::debug("Watchdog watch started for group={} transition from {} to {}", group->group_id_, current_state, new_state); group->SetTargetState(state); /* Group should tie in time to get requested status */ uint64_t timeoutMs = kStateTransitionTimeoutMs; timeoutMs = osi_property_get_int32(kStateTransitionTimeoutMsProp, timeoutMs); cancel_watchdog_if_needed(group->group_id_); alarm_set_on_mloop( watchdog_, timeoutMs, [](void* data) { if (instance) { instance->OnStateTransitionTimeout(PTR_TO_INT(data)); } }, INT_TO_PTR(group->group_id_)); log_history_->AddLogHistory(kLogStateMachineTag, group->group_id_, RawAddress::kEmpty, "WATCHDOG STARTED"); } void AddCisToStreamConfiguration(LeAudioDeviceGroup* group, const struct ase* ase) { group->stream_conf.codec_id = ase->codec_id; auto cis_conn_hdl = ase->cis_conn_hdl; auto& params = group->stream_conf.stream_params.get(ase->direction); log::info("Adding cis handle 0x{:04x} ({}) to stream list", cis_conn_hdl, ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSink ? "sink" : "source"); auto iter = std::find_if(params.stream_locations.begin(), params.stream_locations.end(), [cis_conn_hdl](auto& pair) { return cis_conn_hdl == pair.first; }); log::assert_that(iter == params.stream_locations.end(), "Stream is already there 0x{:04x}", cis_conn_hdl); auto core_config = ase->codec_config.GetAsCoreCodecConfig(); params.num_of_devices++; params.num_of_channels += ase->channel_count; if (!core_config.audio_channel_allocation.has_value()) { log::warn("ASE has invalid audio location"); } auto ase_audio_channel_allocation = core_config.audio_channel_allocation.value_or(0); params.audio_channel_allocation |= ase_audio_channel_allocation; params.stream_locations.emplace_back( std::make_pair(ase->cis_conn_hdl, ase_audio_channel_allocation)); if (params.sample_frequency_hz == 0) { params.sample_frequency_hz = core_config.GetSamplingFrequencyHz(); } else { log::assert_that(params.sample_frequency_hz == core_config.GetSamplingFrequencyHz(), "sample freq mismatch: {}!={}", params.sample_frequency_hz, core_config.GetSamplingFrequencyHz()); } if (params.octets_per_codec_frame == 0) { params.octets_per_codec_frame = *core_config.octets_per_codec_frame; } else { log::assert_that(params.octets_per_codec_frame == *core_config.octets_per_codec_frame, "octets per frame mismatch: {}!={}", params.octets_per_codec_frame, *core_config.octets_per_codec_frame); } if (params.codec_frames_blocks_per_sdu == 0) { params.codec_frames_blocks_per_sdu = *core_config.codec_frames_blocks_per_sdu; } else { log::assert_that( params.codec_frames_blocks_per_sdu == *core_config.codec_frames_blocks_per_sdu, "codec_frames_blocks_per_sdu: {}!={}", params.codec_frames_blocks_per_sdu, *core_config.codec_frames_blocks_per_sdu); } if (params.frame_duration_us == 0) { params.frame_duration_us = core_config.GetFrameDurationUs(); } else { log::assert_that(params.frame_duration_us == core_config.GetFrameDurationUs(), "frame_duration_us: {}!={}", params.frame_duration_us, core_config.GetFrameDurationUs()); } log::info( "Added {} Stream Configuration. CIS Connection Handle: {}, Audio " "Channel Allocation: {}, Number Of Devices: {}, Number Of Channels: {}", (ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSink ? "Sink" : "Source"), cis_conn_hdl, ase_audio_channel_allocation, params.num_of_devices, params.num_of_channels); /* Update CodecManager stream configuration */ state_machine_callbacks_->OnUpdatedCisConfiguration(group->group_id_, ase->direction); } static bool isIntervalAndLatencyProperlySet(uint32_t sdu_interval_us, uint16_t max_latency_ms) { log::verbose("sdu_interval_us: {}, max_latency_ms: {}", sdu_interval_us, max_latency_ms); if (sdu_interval_us == 0) { return max_latency_ms == bluetooth::le_audio::types::kMaxTransportLatencyMin; } return (1000 * max_latency_ms) >= sdu_interval_us; } void ApplyDsaParams(LeAudioDeviceGroup* group, bluetooth::hci::iso_manager::cig_create_params& param) { if (!com::android::bluetooth::flags::leaudio_dynamic_spatial_audio()) { return; } log::info("DSA mode selected: {}", (int)group->dsa_.mode); group->dsa_.active = false; /* Unidirectional streaming */ if (param.sdu_itv_stom == 0) { log::info("Media streaming, apply DSA parameters"); switch (group->dsa_.mode) { case DsaMode::ISO_HW: case DsaMode::ISO_SW: { auto& cis_cfgs = param.cis_cfgs; auto it = cis_cfgs.begin(); for (auto dsa_modes : group->GetAllowedDsaModesList()) { if (!dsa_modes.empty() && it != cis_cfgs.end()) { if (std::find(dsa_modes.begin(), dsa_modes.end(), group->dsa_.mode) != dsa_modes.end()) { log::info("Device found with support for selected DsaMode"); group->dsa_.active = true; param.sdu_itv_stom = bluetooth::le_audio::types::kLeAudioHeadtrackerSduItv; param.max_trans_lat_stom = bluetooth::le_audio::types::kLeAudioHeadtrackerMaxTransLat; it->max_sdu_size_stom = bluetooth::le_audio::types::kLeAudioHeadtrackerMaxSduSize; // Early draft of DSA 2.0 spec mentioned allocating 15 bytes for headtracker data if (!com::android::bluetooth::flags::headtracker_sdu_size()) { it->max_sdu_size_stom = 15; } else if (!group->DsaReducedSduSizeSupported()) { log::verbose("Device does not support reduced headtracker SDU"); it->max_sdu_size_stom = 15; } it->rtn_stom = bluetooth::le_audio::types::kLeAudioHeadtrackerRtn; it++; } } } } break; case DsaMode::ACL: /* Todo: Prioritize the ACL */ break; case DsaMode::DISABLED: default: /* No need to change ISO parameters */ break; } } else { log::debug("Bidirection streaming, ignore DSA mode"); } } bool CigCreate(LeAudioDeviceGroup* group) { uint32_t sdu_interval_mtos, sdu_interval_stom; uint16_t max_trans_lat_mtos, max_trans_lat_stom; uint8_t packing, framing, sca; std::vector cis_cfgs; log::debug("Group: {}, id: {} cig state: {}", std::format_ptr(group), group->group_id_, ToString(group->cig.GetState())); if (group->cig.GetState() != CigState::NONE) { log::warn("Group {}, id: {} has invalid cig state: {}", std::format_ptr(group), group->group_id_, ToString(group->cig.GetState())); return false; } sdu_interval_mtos = group->GetSduInterval(bluetooth::le_audio::types::kLeAudioDirectionSink); sdu_interval_stom = group->GetSduInterval(bluetooth::le_audio::types::kLeAudioDirectionSource); sca = group->GetSCA(); packing = group->GetPacking(); framing = group->GetFraming(); max_trans_lat_mtos = group->GetMaxTransportLatencyMtos(); max_trans_lat_stom = group->GetMaxTransportLatencyStom(); uint16_t max_sdu_size_mtos = 0; uint16_t max_sdu_size_stom = 0; uint8_t phy_mtos = group->GetPhyBitmask(bluetooth::le_audio::types::kLeAudioDirectionSink); uint8_t phy_stom = group->GetPhyBitmask(bluetooth::le_audio::types::kLeAudioDirectionSource); if (!isIntervalAndLatencyProperlySet(sdu_interval_mtos, max_trans_lat_mtos) || !isIntervalAndLatencyProperlySet(sdu_interval_stom, max_trans_lat_stom)) { log::error("Latency and interval not properly set"); group->PrintDebugState(); return false; } // Use 1M Phy for the ACK packet from remote device to phone for better // sensitivity if (group->asymmetric_phy_for_unidirectional_cis_supported && sdu_interval_stom == 0 && (phy_stom & bluetooth::hci::kIsoCigPhy1M) != 0) { log::info("Use asymmetric PHY for unidirectional CIS"); phy_stom = bluetooth::hci::kIsoCigPhy1M; } uint8_t rtn_mtos = 0; uint8_t rtn_stom = 0; /* Currently assumed Sink/Source configuration is same across cis types. * If a cis in cises_ is currently associated with active device/ASE(s), * use the Sink/Source configuration for the same. * If a cis in cises_ is not currently associated with active device/ASE(s), * use the Sink/Source configuration for the cis in cises_ * associated with a active device/ASE(s). When the same cis is associated * later, with active device/ASE(s), check if current configuration is * supported or not, if not, reconfigure CIG. */ for (struct bluetooth::le_audio::types::cis& cis : group->cig.cises) { uint16_t max_sdu_size_mtos_temp = group->GetMaxSduSize(bluetooth::le_audio::types::kLeAudioDirectionSink, cis.id); uint16_t max_sdu_size_stom_temp = group->GetMaxSduSize(bluetooth::le_audio::types::kLeAudioDirectionSource, cis.id); uint8_t rtn_mtos_temp = group->GetRtn(bluetooth::le_audio::types::kLeAudioDirectionSink, cis.id); uint8_t rtn_stom_temp = group->GetRtn(bluetooth::le_audio::types::kLeAudioDirectionSource, cis.id); max_sdu_size_mtos = max_sdu_size_mtos_temp ? max_sdu_size_mtos_temp : max_sdu_size_mtos; max_sdu_size_stom = max_sdu_size_stom_temp ? max_sdu_size_stom_temp : max_sdu_size_stom; rtn_mtos = rtn_mtos_temp ? rtn_mtos_temp : rtn_mtos; rtn_stom = rtn_stom_temp ? rtn_stom_temp : rtn_stom; } for (struct bluetooth::le_audio::types::cis& cis : group->cig.cises) { EXT_CIS_CFG cis_cfg = {}; cis_cfg.cis_id = cis.id; cis_cfg.phy_mtos = phy_mtos; cis_cfg.phy_stom = phy_stom; if (cis.type == bluetooth::le_audio::types::CisType::CIS_TYPE_BIDIRECTIONAL) { cis_cfg.max_sdu_size_mtos = max_sdu_size_mtos; cis_cfg.rtn_mtos = rtn_mtos; cis_cfg.max_sdu_size_stom = max_sdu_size_stom; cis_cfg.rtn_stom = rtn_stom; cis_cfgs.push_back(cis_cfg); } else if (cis.type == bluetooth::le_audio::types::CisType::CIS_TYPE_UNIDIRECTIONAL_SINK) { cis_cfg.max_sdu_size_mtos = max_sdu_size_mtos; cis_cfg.rtn_mtos = rtn_mtos; cis_cfg.max_sdu_size_stom = 0; cis_cfg.rtn_stom = 0; cis_cfgs.push_back(cis_cfg); } else { cis_cfg.max_sdu_size_mtos = 0; cis_cfg.rtn_mtos = 0; cis_cfg.max_sdu_size_stom = max_sdu_size_stom; cis_cfg.rtn_stom = rtn_stom; cis_cfgs.push_back(cis_cfg); } } if ((sdu_interval_mtos == 0 && sdu_interval_stom == 0) || (max_trans_lat_mtos == bluetooth::le_audio::types::kMaxTransportLatencyMin && max_trans_lat_stom == bluetooth::le_audio::types::kMaxTransportLatencyMin) || (max_sdu_size_mtos == 0 && max_sdu_size_stom == 0)) { log::error("Trying to create invalid group"); group->PrintDebugState(); return false; } bluetooth::hci::iso_manager::cig_create_params param = { .sdu_itv_mtos = sdu_interval_mtos, .sdu_itv_stom = sdu_interval_stom, .sca = sca, .packing = packing, .framing = framing, .max_trans_lat_stom = max_trans_lat_stom, .max_trans_lat_mtos = max_trans_lat_mtos, .cis_cfgs = std::move(cis_cfgs), }; ApplyDsaParams(group, param); log_history_->AddLogHistory(kLogStateMachineTag, group->group_id_, RawAddress::kEmpty, kLogCigCreateOp + "#CIS: " + std::to_string(param.cis_cfgs.size())); group->cig.SetState(CigState::CREATING); IsoManager::GetInstance()->CreateCig(group->group_id_, std::move(param)); log::debug("Group: {}, id: {} cig state: {}", std::format_ptr(group), group->group_id_, ToString(group->cig.GetState())); return true; } static bool CisCreateForDevice(LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice) { std::vector conn_pairs; struct ase* ase = leAudioDevice->GetFirstActiveAse(); /* Make sure CIG is there */ if (group->cig.GetState() != CigState::CREATED) { log::error("CIG is not created for group_id {}", group->group_id_); group->PrintDebugState(); return false; } std::stringstream extra_stream; do { /* First in ase pair is Sink, second Source */ auto ases_pair = leAudioDevice->GetAsesByCisConnHdl(ase->cis_conn_hdl); /* Already in pending state - bi-directional CIS or seconde CIS to same * device */ if (ase->cis_state == CisState::CONNECTING || ase->cis_state == CisState::CONNECTED) { continue; } if (ases_pair.sink) { ases_pair.sink->cis_state = CisState::CONNECTING; } if (ases_pair.source) { ases_pair.source->cis_state = CisState::CONNECTING; } uint16_t acl_handle = get_btm_client_interface().peer.BTM_GetHCIConnHandle( leAudioDevice->address_, BT_TRANSPORT_LE); conn_pairs.push_back({.cis_conn_handle = ase->cis_conn_hdl, .acl_conn_handle = acl_handle}); log::info("cis handle: 0x{:04x}, acl handle: 0x{:04x}", ase->cis_conn_hdl, acl_handle); extra_stream << "cis_h:" << loghex(ase->cis_conn_hdl) << " acl_h:" << loghex(acl_handle) << ";;"; } while ((ase = leAudioDevice->GetNextActiveAse(ase))); LeAudioLogHistory::Get()->AddLogHistory( kLogStateMachineTag, leAudioDevice->group_id_, RawAddress::kEmpty, kLogCisCreateOp + "#CIS: " + std::to_string(conn_pairs.size()), extra_stream.str()); IsoManager::GetInstance()->EstablishCis({.conn_pairs = std::move(conn_pairs)}); return true; } static bool CisCreate(LeAudioDeviceGroup* group) { LeAudioDevice* leAudioDevice = group->GetFirstActiveDevice(); struct ase* ase; std::vector conn_pairs; log::assert_that(leAudioDevice, "Shouldn't be called without an active device."); /* Make sure CIG is there */ if (group->cig.GetState() != CigState::CREATED) { log::error("CIG is not created for group_id {}", group->group_id_); group->PrintDebugState(); return false; } do { ase = leAudioDevice->GetFirstActiveAse(); log::assert_that(ase, "shouldn't be called without an active ASE"); do { /* First is ase pair is Sink, second Source */ auto ases_pair = leAudioDevice->GetAsesByCisConnHdl(ase->cis_conn_hdl); /* Already in pending state - bi-directional CIS */ if (ase->cis_state == CisState::CONNECTING) { continue; } if (ases_pair.sink) { ases_pair.sink->cis_state = CisState::CONNECTING; } if (ases_pair.source) { ases_pair.source->cis_state = CisState::CONNECTING; } uint16_t acl_handle = get_btm_client_interface().peer.BTM_GetHCIConnHandle( leAudioDevice->address_, BT_TRANSPORT_LE); conn_pairs.push_back({.cis_conn_handle = ase->cis_conn_hdl, .acl_conn_handle = acl_handle}); log::debug("cis handle: {} acl handle : 0x{:x}", ase->cis_conn_hdl, acl_handle); } while ((ase = leAudioDevice->GetNextActiveAse(ase))); } while ((leAudioDevice = group->GetNextActiveDevice(leAudioDevice))); IsoManager::GetInstance()->EstablishCis({.conn_pairs = std::move(conn_pairs)}); return true; } static void PrepareDataPath(int group_id, struct ase* ase) { bluetooth::hci::iso_manager::iso_data_path_params param = { .data_path_dir = ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSink ? bluetooth::hci::iso_manager::kIsoDataPathDirectionIn : bluetooth::hci::iso_manager::kIsoDataPathDirectionOut, .data_path_id = ase->data_path_configuration.dataPathId, .codec_id_format = ase->data_path_configuration.isoDataPathConfig.codecId.coding_format, .codec_id_company = ase->data_path_configuration.isoDataPathConfig.codecId.vendor_company_id, .codec_id_vendor = ase->data_path_configuration.isoDataPathConfig.codecId.vendor_codec_id, .controller_delay = ase->data_path_configuration.isoDataPathConfig.controllerDelayUs, .codec_conf = ase->data_path_configuration.isoDataPathConfig.configuration, }; LeAudioLogHistory::Get()->AddLogHistory( kLogStateMachineTag, group_id, RawAddress::kEmpty, kLogSetDataPathOp + "cis_h:" + loghex(ase->cis_conn_hdl), "direction: " + loghex(param.data_path_dir) + ", codecId: " + ToString(ase->data_path_configuration.isoDataPathConfig.codecId)); ase->data_path_state = DataPathState::CONFIGURING; IsoManager::GetInstance()->SetupIsoDataPath(ase->cis_conn_hdl, std::move(param)); } static void ReleaseDataPath(LeAudioDeviceGroup* group) { LeAudioDevice* leAudioDevice = group->GetFirstActiveDevice(); log::assert_that(leAudioDevice, "Shouldn't be called without an active device."); auto ase = leAudioDevice->GetFirstActiveAseByCisAndDataPathState(CisState::CONNECTED, DataPathState::CONFIGURED); log::assert_that(ase, "Shouldn't be called without an active ASE."); RemoveDataPathByCisHandle(leAudioDevice, ase->cis_conn_hdl); } void SetAseState(LeAudioDevice* leAudioDevice, struct ase* ase, AseState state) { log::info("{}, ase_id: {}, {} -> {}", leAudioDevice->address_, ase->id, ToString(ase->state), ToString(state)); log_history_->AddLogHistory(kLogStateMachineTag, leAudioDevice->group_id_, leAudioDevice->address_, "ASE_ID " + std::to_string(ase->id) + ": " + kLogStateChangedOp, ToString(ase->state) + "->" + ToString(state)); ase->state = state; } LeAudioDevice* getDeviceTryingToAttachTheStream(LeAudioDeviceGroup* group) { /* Device which is attaching the stream is just an active device not in * STREAMING state and NOT in the RELEASING state. * The precondition is, that TargetState is Streaming */ log::debug("group_id: {}, targetState: {}", group->group_id_, ToString(group->GetTargetState())); if (group->GetTargetState() != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { return nullptr; } for (auto dev = group->GetFirstActiveDevice(); dev != nullptr; dev = group->GetNextActiveDevice(dev)) { if (!dev->HaveAllActiveAsesSameState(AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) && !dev->HaveAnyReleasingAse()) { log::debug("Attaching device {} to group_id: {}", dev->address_, group->group_id_); return dev; } } return nullptr; } void AseStateMachineProcessIdle( struct bluetooth::le_audio::client_parser::ascs::ase_rsp_hdr& /*arh*/, struct ase* ase, LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice) { switch (ase->state) { case AseState::BTA_LE_AUDIO_ASE_STATE_IDLE: case AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED: break; case AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING: { SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_IDLE); ase->active = false; ase->configured_for_context_type = bluetooth::le_audio::types::LeAudioContextType::UNINITIALIZED; if (!leAudioDevice->HaveAllActiveAsesSameState(AseState::BTA_LE_AUDIO_ASE_STATE_IDLE)) { /* More ASEs notification from this device has to come for this group */ log::debug("Wait for more ASE to configure for device {}", leAudioDevice->address_); return; } if (!group->HaveAllActiveDevicesAsesTheSameState(AseState::BTA_LE_AUDIO_ASE_STATE_IDLE)) { log::debug("Waiting for more devices to get into idle state"); return; } /* Last node is in releasing state*/ group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_IDLE); group->PrintDebugState(); /* If all CISes are disconnected, notify upper layer about IDLE state, * otherwise wait for */ if (!group->HaveAllCisesDisconnected() || getDeviceTryingToAttachTheStream(group) != nullptr) { log::warn("Not all CISes removed before going to IDLE for group {}, waiting...", group->group_id_); group->PrintDebugState(); return; } cancel_watchdog_if_needed(group->group_id_); ReleaseCisIds(group); state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::IDLE); break; } case AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED: case AseState::BTA_LE_AUDIO_ASE_STATE_DISABLING: log::error("Ignore invalid attempt of state transition from {} to {}, {}, ase_id: {}", ToString(ase->state), ToString(AseState::BTA_LE_AUDIO_ASE_STATE_IDLE), leAudioDevice->address_, ase->id); group->PrintDebugState(); break; case AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING: case AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING: log::error("Invalid state transition from {} to {}, {}, ase_id: {}. Stopping the stream.", ToString(ase->state), ToString(AseState::BTA_LE_AUDIO_ASE_STATE_IDLE), leAudioDevice->address_, ase->id); group->PrintDebugState(); StopStream(group); break; } } void PrepareAndSendQoSToTheGroup(LeAudioDeviceGroup* group) { LeAudioDevice* leAudioDevice = group->GetFirstActiveDevice(); if (!leAudioDevice) { log::error("No active device for the group"); group->PrintDebugState(); ClearGroup(group, true); return; } for (; leAudioDevice; leAudioDevice = group->GetNextActiveDevice(leAudioDevice)) { PrepareAndSendConfigQos(group, leAudioDevice); } } bool PrepareAndSendCodecConfigToTheGroup(LeAudioDeviceGroup* group) { log::info("group_id: {}", group->group_id_); auto leAudioDevice = group->GetFirstActiveDevice(); if (!leAudioDevice) { log::error("No active device for the group"); return false; } for (; leAudioDevice; leAudioDevice = group->GetNextActiveDevice(leAudioDevice)) { PrepareAndSendCodecConfigure(group, leAudioDevice); } return true; } void PrepareAndSendCodecConfigure(LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice) { struct bluetooth::le_audio::client_parser::ascs::ctp_codec_conf conf; std::vector confs; struct ase* ase; std::stringstream msg_stream; std::stringstream extra_stream; if (!group->cig.AssignCisIds(leAudioDevice)) { log::error("unable to assign CIS IDs"); StopStream(group); return; } if (group->cig.GetState() == CigState::CREATED) { group->AssignCisConnHandlesToAses(leAudioDevice); } msg_stream << kLogAseConfigOp; ase = leAudioDevice->GetFirstActiveAse(); log::assert_that(ase, "shouldn't be called without an active ASE"); for (; ase != nullptr; ase = leAudioDevice->GetNextActiveAse(ase)) { log::debug("device: {}, ase_id: {}, cis_id: {}, ase state: {}", leAudioDevice->address_, ase->id, ase->cis_id, ToString(ase->state)); conf.ase_id = ase->id; conf.target_latency = ase->target_latency; conf.target_phy = group->GetTargetPhy(ase->direction); conf.codec_id = ase->codec_id; if (!ase->vendor_codec_config.empty()) { log::debug("Using vendor codec configuration."); conf.codec_config = ase->vendor_codec_config; } else { conf.codec_config = ase->codec_config.RawPacket(); } confs.push_back(conf); msg_stream << "ASE_ID " << +conf.ase_id << ","; if (ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSink) { extra_stream << "snk,"; } else { extra_stream << "src,"; } extra_stream << +conf.codec_id.coding_format << "," << +conf.target_latency << ";;"; } std::vector value; log::info("{} -> ", leAudioDevice->address_); bluetooth::le_audio::client_parser::ascs::PrepareAseCtpCodecConfig(confs, value); WriteToControlPoint(leAudioDevice, value); log_history_->AddLogHistory(kLogControlPointCmd, group->group_id_, leAudioDevice->address_, msg_stream.str(), extra_stream.str()); } void AseStateMachineProcessCodecConfigured( struct bluetooth::le_audio::client_parser::ascs::ase_rsp_hdr& /*arh*/, struct ase* ase, uint8_t* data, uint16_t len, LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice) { if (!group) { log::error("leAudioDevice doesn't belong to any group"); return; } /* Internal helper for filling in the QoS parameters for an ASE, based * on the codec configure state and the prefferend ASE QoS parameters. * Note: The whole group state dependent parameters (out_cfg.framing, and * out.cfg.presentation_delay) are calculated later, in the * PrepareAndSendConfigQos(), once the whole group transitions to a * proper state. */ auto qos_config_update = [leAudioDevice]( const struct bluetooth::le_audio::client_parser::ascs:: ase_codec_configured_state_params& rsp, bluetooth::le_audio::types::AseQosPreferences& out_qos, bluetooth::le_audio::types::AseQosConfiguration& out_cfg) { out_qos.supported_framing = rsp.framing; out_qos.preferred_phy = rsp.preferred_phy; out_qos.preferred_retrans_nb = rsp.preferred_retrans_nb; out_qos.pres_delay_min = rsp.pres_delay_min; out_qos.pres_delay_max = rsp.pres_delay_max; out_qos.preferred_pres_delay_min = rsp.preferred_pres_delay_min; out_qos.preferred_pres_delay_max = rsp.preferred_pres_delay_max; /* Validate and update QoS to be consistent */ if ((!out_cfg.max_transport_latency || out_cfg.max_transport_latency > rsp.max_transport_latency) || !out_cfg.retrans_nb || !out_cfg.phy) { out_cfg.max_transport_latency = rsp.max_transport_latency; out_cfg.retrans_nb = rsp.preferred_retrans_nb; out_cfg.phy = leAudioDevice->GetPreferredPhyBitmask(rsp.preferred_phy); log::info( "Using server preferred QoS settings. Max Transport Latency: {}, " "Retransmission Number: {}, Phy: {}", out_cfg.max_transport_latency, out_cfg.retrans_nb, out_cfg.phy); } }; /* ase contain current ASE state. New state is in "arh" */ switch (ase->state) { case AseState::BTA_LE_AUDIO_ASE_STATE_IDLE: { struct bluetooth::le_audio::client_parser::ascs::ase_codec_configured_state_params rsp; /* Cache codec configured status values for further * configuration/reconfiguration */ if (!ParseAseStatusCodecConfiguredStateParams(rsp, len, data)) { StopStream(group); return; } uint16_t cig_curr_max_trans_lat_mtos = group->GetMaxTransportLatencyMtos(); uint16_t cig_curr_max_trans_lat_stom = group->GetMaxTransportLatencyStom(); if (group->GetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { /* We are here because of the reconnection of the single device. * Reconfigure CIG if current CIG supported Max Transport Latency for * a direction, cannot be supported by the newly connected member * device's ASE for the direction. */ if ((ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSink && cig_curr_max_trans_lat_mtos > rsp.max_transport_latency) || (ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSource && cig_curr_max_trans_lat_stom > rsp.max_transport_latency)) { group->SetPendingConfiguration(); StopStream(group); return; } } qos_config_update(rsp, ase->qos_preferences, ase->qos_config); SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED); if (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_IDLE) { /* This is autonomus change of the remote device */ log::debug("Autonomus change for device {}, ase id {}. Just store it.", leAudioDevice->address_, ase->id); if (group->HaveAllActiveDevicesAsesTheSameState( AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED)) { group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED); } return; } if (leAudioDevice->HaveAnyUnconfiguredAses()) { /* More ASEs notification from this device has to come for this group */ log::debug("More Ases to be configured for the device {}", leAudioDevice->address_); return; } if (group->GetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { /* We are here because of the reconnection of the single device. */ /* Make sure that device is ready to be configured as we could also * get here triggered by the remote device. If device is not connected * yet, we should wait for the stack to trigger adding device to the * stream */ if (leAudioDevice->GetConnectionState() == bluetooth::le_audio::DeviceConnectState::CONNECTED) { PrepareAndSendConfigQos(group, leAudioDevice); } else { log::debug( "Device {} initiated configured state but it is not yet ready to be configured", leAudioDevice->address_); } return; } /* Configure ASEs for next device in group */ if (group->HaveAnyActiveDeviceInUnconfiguredState()) { log::debug("Waiting for all the ASES in the Configured state"); return; } /* Last node configured, process group to codec configured state */ group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED); if (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING || group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED) { if (group->cig.GetState() == CigState::CREATED) { /* It can happen on the earbuds switch scenario. When one device * is getting remove while other is adding to the stream and CIG is * already created. * Also if one of the set members got reconnected while the other was in QoSConfigured * state. In this case, state machine will keep CIG but will send Codec Config to all * the set members and when ASEs will move to Codec Configured State, we would like a * whole group to move to QoS Configure.*/ PrepareAndSendQoSToTheGroup(group); } else if (!CigCreate(group)) { log::error("Could not create CIG. Stop the stream for group {}", group->group_id_); StopStream(group); } return; } if (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED && group->IsPendingConfiguration()) { log::info("Configured state completed"); /* If all CISes are disconnected, notify upper layer about IDLE * state, otherwise wait for */ if (!group->HaveAllCisesDisconnected()) { log::warn("Not all CISes removed before going to CONFIGURED for group {}, waiting...", group->group_id_); group->PrintDebugState(); return; } group->ClearPendingConfiguration(); state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::CONFIGURED_BY_USER); /* No more transition for group */ cancel_watchdog_if_needed(group->group_id_); return; } log::error(", invalid state transition, from: {} to {}", ToString(group->GetState()), ToString(group->GetTargetState())); StopStream(group); break; } case AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED: { /* Received Configured in Configured state. This could be done * autonomously because of the reconfiguration done by us */ struct bluetooth::le_audio::client_parser::ascs::ase_codec_configured_state_params rsp; /* Cache codec configured status values for further * configuration/reconfiguration */ if (!ParseAseStatusCodecConfiguredStateParams(rsp, len, data)) { StopStream(group); return; } /* This may be a notification from a re-configured ASE */ ase->reconfigure = false; qos_config_update(rsp, ase->qos_preferences, ase->qos_config); if (leAudioDevice->HaveAnyUnconfiguredAses()) { /* Waiting for others to be reconfigured */ return; } if (group->GetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { /* We are here because of the reconnection of the single device. */ /* Make sure that device is ready to be configured as we could also * get here triggered by the remote device. If device is not connected * yet, we should wait for the stack to trigger adding device to the * stream */ if (leAudioDevice->GetConnectionState() == bluetooth::le_audio::DeviceConnectState::CONNECTED) { PrepareAndSendConfigQos(group, leAudioDevice); } else { log::debug( "Device {} initiated configured state but it is not yet ready to be configured", leAudioDevice->address_); } return; } if (group->HaveAnyActiveDeviceInUnconfiguredState()) { log::debug("Waiting for all the devices to be configured for group id {}", group->group_id_); return; } /* Last node configured, process group to codec configured state */ group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED); if (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { if (group->cig.GetState() == CigState::CREATED) { /* It can happen on the earbuds switch scenario. When one device * is getting remove while other is adding to the stream and CIG is * already created */ PrepareAndSendConfigQos(group, leAudioDevice); } else if (!CigCreate(group)) { log::error("Could not create CIG. Stop the stream for group {}", group->group_id_); StopStream(group); } return; } if (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED && group->IsPendingConfiguration()) { log::info("Configured state completed"); group->ClearPendingConfiguration(); state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::CONFIGURED_BY_USER); /* No more transition for group */ cancel_watchdog_if_needed(group->group_id_); return; } log::info("Autonomous change, from: {} to {}", ToString(group->GetState()), ToString(group->GetTargetState())); break; } case AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED: SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED); group->PrintDebugState(); break; case AseState::BTA_LE_AUDIO_ASE_STATE_DISABLING: log::error("Ignore invalid attempt of state transition from {} to {}, {}, ase_id: {}", ToString(ase->state), ToString(AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED), leAudioDevice->address_, ase->id); group->PrintDebugState(); break; case AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING: SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED); ase->active = false; if (!leAudioDevice->HaveAllActiveAsesSameState( AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED)) { /* More ASEs notification from this device has to come for this group */ log::debug("Wait for more ASE to configure for device {}", leAudioDevice->address_); return; } { auto activeDevice = group->GetFirstActiveDevice(); if (activeDevice) { log::debug("There is at least one active device {}, wait to become inactive", activeDevice->address_); return; } } /* Last node is in releasing state*/ group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED); /* Remote device has cache and keep staying in configured state after * release. Therefore, we assume this is a target state requested by * remote device. */ group->SetTargetState(group->GetState()); if (!group->HaveAllCisesDisconnected()) { log::warn("Not all CISes removed before going to IDLE for group {}, waiting...", group->group_id_); group->PrintDebugState(); return; } cancel_watchdog_if_needed(group->group_id_); state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::CONFIGURED_AUTONOMOUS); break; case AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING: case AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING: log::error("Invalid state transition from {} to {}, {}, ase_id: {}. Stopping the stream", ToString(ase->state), ToString(AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED), leAudioDevice->address_, ase->id); group->PrintDebugState(); StopStream(group); break; } } void AseStateMachineProcessQosConfigured( struct bluetooth::le_audio::client_parser::ascs::ase_rsp_hdr& /*arh*/, struct ase* ase, LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice) { if (!group) { log::error("leAudioDevice doesn't belong to any group"); return; } switch (ase->state) { case AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED: log::info( "Unexpected state transition from {} to {}, {}, ase_id: {}, " "fallback to transition from {} to {}", ToString(ase->state), ToString(AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED), leAudioDevice->address_, ase->id, ToString(AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED), ToString(AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED)); group->PrintDebugState(); [[fallthrough]]; case AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED: { SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); if (group->GetTargetState() != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING && group->GetTargetState() != AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED) { log::warn("{}, ase_id: {}, target state: {}", leAudioDevice->address_, ase->id, ToString(group->GetTargetState())); group->PrintDebugState(); return; } if (!leAudioDevice->HaveAllActiveAsesSameState( AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED)) { /* More ASEs notification from this device has to come for this group */ return; } if (group->GetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { /* We are here because of the reconnection of the single device. */ PrepareAndSendEnable(leAudioDevice); return; } if (!group->HaveAllActiveDevicesAsesTheSameState( AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED)) { log::debug("Waiting for all the devices to be in QoS state"); return; } group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); if (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED) { cancel_watchdog_if_needed(group->group_id_); state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::CONFIGURED_BY_USER); return; } PrepareAndSendEnableToTheGroup(group); break; } case AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING: if (ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSource) { /* Source ASE cannot go from Streaming to QoS Configured state */ log::error("invalid state transition, from: {}, to: {}", static_cast(ase->state), static_cast(AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED)); StopStream(group); return; } SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); if (group->HaveAllActiveDevicesAsesTheSameState( AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED)) { group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); } if (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED) { /* Process the Disable Transition of the rest of group members if no * more ASE notifications has to come from this device. */ ProcessGroupDisable(group); } else { /* Remote may autonomously bring ASEs to QoS configured state */ ProcessAutonomousDisable(group, leAudioDevice, ase); } break; case AseState::BTA_LE_AUDIO_ASE_STATE_DISABLING: { SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); /* More ASEs notification from this device has to come for this group */ if (!group->HaveAllActiveDevicesAsesTheSameState( AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED)) { return; } group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); if (!group->HaveAllCisesDisconnected()) { return; } if (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED) { /* No more transition for group */ cancel_watchdog_if_needed(group->group_id_); state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::SUSPENDED); } else { log::error(", invalid state transition, from: {}, to: {}", ToString(group->GetState()), ToString(group->GetTargetState())); StopStream(group); return; } break; } case AseState::BTA_LE_AUDIO_ASE_STATE_IDLE: case AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING: // Do nothing here, just print an error message log::error("Ignore invalid attempt of state transition from {} to {}, {}, ase_id: {}", ToString(ase->state), ToString(AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED), leAudioDevice->address_, ase->id); group->PrintDebugState(); break; case AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING: log::error("Invalid state transition from {} to {}, {}, ase_id: {}. Stopping the stream.", ToString(ase->state), ToString(AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED), leAudioDevice->address_, ase->id); StopStream(group); break; } } void ClearGroup(LeAudioDeviceGroup* group, bool report_idle_state) { log::debug("group_id: {}", group->group_id_); group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_IDLE); group->SetTargetState(AseState::BTA_LE_AUDIO_ASE_STATE_IDLE); /* Clear group pending status */ group->ClearPendingAvailableContextsChange(); group->ClearPendingConfiguration(); cancel_watchdog_if_needed(group->group_id_); ReleaseCisIds(group); RemoveCigForGroup(group); if (report_idle_state) { state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::IDLE); } } void PrepareAndSendEnableToTheGroup(LeAudioDeviceGroup* group) { log::info("group_id: {}", group->group_id_); auto leAudioDevice = group->GetFirstActiveDevice(); if (!leAudioDevice) { log::error("No active device for the group"); group->PrintDebugState(); ClearGroup(group, true); return; } for (; leAudioDevice; leAudioDevice = group->GetNextActiveDevice(leAudioDevice)) { PrepareAndSendEnable(leAudioDevice); } } void PrepareAndSendEnable(LeAudioDevice* leAudioDevice) { struct bluetooth::le_audio::client_parser::ascs::ctp_enable conf; std::vector confs; std::vector value; struct ase* ase; std::stringstream msg_stream; std::stringstream extra_stream; msg_stream << kLogAseEnableOp; ase = leAudioDevice->GetFirstActiveAse(); log::assert_that(ase, "shouldn't be called without an active ASE"); do { log::debug("device: {}, ase_id: {}, cis_id: {}, ase state: {}", leAudioDevice->address_, ase->id, ase->cis_id, ToString(ase->state)); conf.ase_id = ase->id; conf.metadata = ase->metadata; confs.push_back(conf); /* Below is just for log history */ msg_stream << "ASE_ID " << +ase->id << ","; extra_stream << "meta: " << base::HexEncode(conf.metadata.data(), conf.metadata.size()) << ";;"; } while ((ase = leAudioDevice->GetNextActiveAse(ase))); bluetooth::le_audio::client_parser::ascs::PrepareAseCtpEnable(confs, value); WriteToControlPoint(leAudioDevice, value); log::info("group_id: {}, {}", leAudioDevice->group_id_, leAudioDevice->address_); log_history_->AddLogHistory(kLogControlPointCmd, leAudioDevice->group_id_, leAudioDevice->address_, msg_stream.str(), extra_stream.str()); } GroupStreamStatus PrepareAndSendDisableToTheGroup(LeAudioDeviceGroup* group) { log::info("grop_id: {}", group->group_id_); auto leAudioDevice = group->GetFirstActiveDevice(); if (!leAudioDevice) { log::error("No active device for the group"); group->PrintDebugState(); ClearGroup(group, false); return GroupStreamStatus::IDLE; } for (; leAudioDevice; leAudioDevice = group->GetNextActiveDevice(leAudioDevice)) { PrepareAndSendDisable(leAudioDevice); } return GroupStreamStatus::SUSPENDING; } void PrepareAndSendDisable(LeAudioDevice* leAudioDevice) { ase* ase = leAudioDevice->GetFirstActiveAse(); log::assert_that(ase, "shouldn't be called without an active ASE"); std::stringstream msg_stream; msg_stream << kLogAseDisableOp; std::vector ids; do { log::debug("device: {}, ase_id: {}, cis_id: {}, ase state: {}", leAudioDevice->address_, ase->id, ase->cis_id, ToString(ase->state)); ids.push_back(ase->id); msg_stream << "ASE_ID " << +ase->id << ", "; } while ((ase = leAudioDevice->GetNextActiveAse(ase))); log::info("group_id: {}, {}", leAudioDevice->group_id_, leAudioDevice->address_); std::vector value; bluetooth::le_audio::client_parser::ascs::PrepareAseCtpDisable(ids, value); WriteToControlPoint(leAudioDevice, value); log_history_->AddLogHistory(kLogControlPointCmd, leAudioDevice->group_id_, leAudioDevice->address_, msg_stream.str()); } GroupStreamStatus PrepareAndSendReleaseToTheGroup(LeAudioDeviceGroup* group) { log::info("group_id: {}", group->group_id_); LeAudioDevice* leAudioDevice = group->GetFirstActiveDevice(); if (!leAudioDevice) { log::error("No active device for the group"); group->PrintDebugState(); ClearGroup(group, false); return GroupStreamStatus::IDLE; } for (; leAudioDevice; leAudioDevice = group->GetNextActiveDevice(leAudioDevice)) { PrepareAndSendRelease(leAudioDevice); } return GroupStreamStatus::RELEASING; } void PrepareAndSendRelease(LeAudioDevice* leAudioDevice) { ase* ase = leAudioDevice->GetFirstActiveAse(); log::assert_that(ase, "shouldn't be called without an active ASE"); std::vector ids; std::stringstream stream; stream << kLogAseReleaseOp; do { log::debug("device: {}, ase_id: {}, cis_id: {}, ase state: {}", leAudioDevice->address_, ase->id, ase->cis_id, ToString(ase->state)); ids.push_back(ase->id); stream << "ASE_ID " << +ase->id << ","; } while ((ase = leAudioDevice->GetNextActiveAse(ase))); std::vector value; bluetooth::le_audio::client_parser::ascs::PrepareAseCtpRelease(ids, value); WriteToControlPoint(leAudioDevice, value); log::info("group_id: {}, {}", leAudioDevice->group_id_, leAudioDevice->address_); log_history_->AddLogHistory(kLogControlPointCmd, leAudioDevice->group_id_, leAudioDevice->address_, stream.str()); } void PrepareAndSendConfigQos(LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice) { std::vector confs; bool validate_transport_latency = false; bool validate_max_sdu_size = false; std::stringstream msg_stream; msg_stream << kLogAseQoSConfigOp; std::stringstream extra_stream; int number_of_active_ases = 0; int number_of_streaming_ases = 0; for (struct ase* ase = leAudioDevice->GetFirstActiveAse(); ase != nullptr; ase = leAudioDevice->GetNextActiveAse(ase)) { log::debug("device: {}, ase_id: {}, cis_id: {}, ase state: {}", leAudioDevice->address_, ase->id, ase->cis_id, ToString(ase->state)); /* QoS Config can be done on ASEs which are in Codec Configured and QoS Configured state. * If ASE is streaming, it can be skipped. */ number_of_active_ases++; if (ase->state == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { number_of_streaming_ases++; continue; } /* Fill in the whole group dependent ASE parameters */ if (!group->GetPresentationDelay(&ase->qos_config.presentation_delay, ase->direction)) { log::error("inconsistent presentation delay for group"); group->PrintDebugState(); StopStream(group); return; } ase->qos_config.framing = group->GetFraming(); struct bluetooth::le_audio::client_parser::ascs::ctp_qos_conf conf; conf.ase_id = ase->id; conf.cig = group->group_id_; conf.cis = ase->cis_id; conf.framing = ase->qos_config.framing; conf.phy = ase->qos_config.phy; conf.max_sdu = ase->qos_config.max_sdu_size; conf.retrans_nb = ase->qos_config.retrans_nb; conf.pres_delay = ase->qos_config.presentation_delay; conf.sdu_interval = ase->qos_config.sdu_interval; if (!conf.sdu_interval) { log::error("unsupported SDU interval for group"); group->PrintDebugState(); StopStream(group); return; } msg_stream << "ASE " << +conf.ase_id << ","; if (ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSink) { conf.max_transport_latency = group->GetMaxTransportLatencyMtos(); extra_stream << "snk,"; } else { conf.max_transport_latency = group->GetMaxTransportLatencyStom(); extra_stream << "src,"; } if (conf.max_transport_latency > bluetooth::le_audio::types::kMaxTransportLatencyMin) { validate_transport_latency = true; } if (conf.max_sdu > 0) { validate_max_sdu_size = true; } confs.push_back(conf); // dir...cis_id,sdu,lat,rtn,phy,frm;; extra_stream << +conf.cis << "," << +conf.max_sdu << "," << +conf.max_transport_latency << "," << +conf.retrans_nb << "," << +conf.phy << "," << +conf.framing << ";;"; } if (number_of_streaming_ases > 0 && number_of_streaming_ases == number_of_active_ases) { log::debug("Device {} is already streaming", leAudioDevice->address_); return; } if (confs.size() == 0 || !validate_transport_latency || !validate_max_sdu_size) { log::error("Invalid configuration or latency or sdu size"); group->PrintDebugState(); StopStream(group); return; } std::vector value; bluetooth::le_audio::client_parser::ascs::PrepareAseCtpConfigQos(confs, value); WriteToControlPoint(leAudioDevice, value); log::info("group_id: {}, {}", leAudioDevice->group_id_, leAudioDevice->address_); log_history_->AddLogHistory(kLogControlPointCmd, group->group_id_, leAudioDevice->address_, msg_stream.str(), extra_stream.str()); } void PrepareAndSendUpdateMetadata(LeAudioDevice* leAudioDevice, const BidirectionalPair& context_types, const BidirectionalPair>& ccid_lists) { std::vector confs; std::stringstream msg_stream; msg_stream << kLogAseUpdateMetadataOp; std::stringstream extra_stream; if (!leAudioDevice->IsMetadataChanged(context_types, ccid_lists)) { return; } /* Request server to update ASEs with new metadata */ for (struct ase* ase = leAudioDevice->GetFirstActiveAse(); ase != nullptr; ase = leAudioDevice->GetNextActiveAse(ase)) { log::debug("device: {}, ase_id: {}, cis_id: {}, ase state: {}", leAudioDevice->address_, ase->id, ase->cis_id, ToString(ase->state)); if (ase->state != AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING && ase->state != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { /* This might happen when update metadata happens on late connect */ log::debug( "Metadata for ase_id {} cannot be updated due to invalid ase state - see log above", ase->id); continue; } msg_stream << "ASE_ID " << +ase->id << ","; if (ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSink) { extra_stream << "snk,"; } else { extra_stream << "src,"; } /* Filter multidirectional audio context for each ase direction */ auto directional_audio_context = context_types.get(ase->direction) & leAudioDevice->GetAvailableContexts(ase->direction); std::vector new_metadata; if (directional_audio_context.any()) { new_metadata = leAudioDevice->GetMetadata(directional_audio_context, ccid_lists.get(ase->direction)); } else { new_metadata = leAudioDevice->GetMetadata(AudioContexts(LeAudioContextType::UNSPECIFIED), std::vector()); } /* Do not update if metadata did not changed. */ if (ase->metadata == new_metadata) { continue; } ase->metadata = new_metadata; struct bluetooth::le_audio::client_parser::ascs::ctp_update_metadata conf; conf.ase_id = ase->id; conf.metadata = ase->metadata; confs.push_back(conf); extra_stream << "meta: " << base::HexEncode(conf.metadata.data(), conf.metadata.size()) << ";;"; } if (confs.size() != 0) { std::vector value; bluetooth::le_audio::client_parser::ascs::PrepareAseCtpUpdateMetadata(confs, value); WriteToControlPoint(leAudioDevice, value); log::info("group_id: {}, {}", leAudioDevice->group_id_, leAudioDevice->address_); log_history_->AddLogHistory(kLogControlPointCmd, leAudioDevice->group_id_, leAudioDevice->address_, msg_stream.str(), extra_stream.str()); } } void PrepareAndSendReceiverStartReady(LeAudioDevice* leAudioDevice, struct ase* ase) { std::vector ids; std::vector value; std::stringstream stream; stream << kLogAseStartReadyOp; do { if (ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSource) { stream << "ASE_ID " << +ase->id << ","; ids.push_back(ase->id); } } while ((ase = leAudioDevice->GetNextActiveAse(ase))); if (ids.size() > 0) { bluetooth::le_audio::client_parser::ascs::PrepareAseCtpAudioReceiverStartReady(ids, value); WriteToControlPoint(leAudioDevice, value); log::info("group_id: {}, {}", leAudioDevice->group_id_, leAudioDevice->address_); log_history_->AddLogHistory(kLogControlPointCmd, leAudioDevice->group_id_, leAudioDevice->address_, stream.str()); } } void AseStateMachineProcessEnabling( struct bluetooth::le_audio::client_parser::ascs::ase_rsp_hdr& /*arh*/, struct ase* ase, LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice) { if (!group) { log::error("leAudioDevice doesn't belong to any group"); return; } switch (ase->state) { case AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED: SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING); if (group->GetTargetState() != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { log::warn("{}, ase_id: {}, target state: {}", leAudioDevice->address_, ase->id, ToString(group->GetTargetState())); group->PrintDebugState(); return; } if (group->GetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { if (ase->cis_state < CisState::CONNECTING) { /* We are here because of the reconnection of the single device. */ if (!CisCreateForDevice(group, leAudioDevice)) { StopStream(group); return; } } if (!leAudioDevice->HaveAllActiveAsesCisEst()) { /* More cis established events has to come */ return; } if (!leAudioDevice->IsReadyToCreateStream()) { /* Device still remains in ready to create stream state. It means * that more enabling status notifications has to come. */ return; } /* All CISes created. Send start ready for source ASE before we can go * to streaming state. */ struct ase* ase = leAudioDevice->GetFirstActiveAse(); log::assert_that(ase != nullptr, "shouldn't be called without an active ASE, device {}", leAudioDevice->address_.ToString()); PrepareAndSendReceiverStartReady(leAudioDevice, ase); return; } if (leAudioDevice->IsReadyToCreateStream()) { ProcessGroupEnable(group); } break; case AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING: /* Enable/Switch Content */ break; default: log::error("invalid state transition, from: {}, to: {}", static_cast(ase->state), static_cast(AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING)); StopStream(group); break; } } void AseStateMachineProcessStreaming( struct bluetooth::le_audio::client_parser::ascs::ase_rsp_hdr& /*arh*/, struct ase* ase, uint8_t* data, uint16_t len, LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice) { if (!group) { log::error("leAudioDevice doesn't belong to any group"); return; } switch (ase->state) { case AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED: log::error("{}, ase_id: {}, moving from QoS Configured to Streaming is impossible.", leAudioDevice->address_, ase->id); group->PrintDebugState(); StopStream(group); break; case AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING: { std::vector value; SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING); if (!group->HaveAllActiveDevicesAsesTheSameState( AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING)) { /* More ASEs notification form this device has to come for this group */ return; } if (group->GetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { /* We are here because of the reconnection of the single device */ log::info("{}, Ase id: {}, ase state: {}", leAudioDevice->address_, ase->id, bluetooth::common::ToString(ase->state)); cancel_watchdog_if_needed(group->group_id_); state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::STREAMING); return; } /* Not all CISes establish events will came */ if (!group->IsGroupStreamReady()) { log::info("CISes are not yet ready, wait for it."); group->SetNotifyStreamingWhenCisesAreReadyFlag(true); return; } if (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { /* No more transition for group */ cancel_watchdog_if_needed(group->group_id_); /* Last node is in streaming state */ group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING); state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::STREAMING); return; } log::error(", invalid state transition, from: {}, to: {}", ToString(group->GetState()), ToString(group->GetTargetState())); StopStream(group); break; } case AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING: { struct bluetooth::le_audio::client_parser::ascs::ase_transient_state_params rsp; if (!ParseAseStatusTransientStateParams(rsp, len, data)) { StopStream(group); return; } /* Cache current set up metadata values for for further possible * reconfiguration */ if (!rsp.metadata.empty()) { ase->metadata = rsp.metadata; } break; } default: log::error("invalid state transition, from: {}, to: {}", static_cast(ase->state), static_cast(AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING)); StopStream(group); break; } } void AseStateMachineProcessDisabling( struct bluetooth::le_audio::client_parser::ascs::ase_rsp_hdr& /*arh*/, struct ase* ase, LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice) { if (!group) { log::error("leAudioDevice doesn't belong to any group"); return; } if (ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSink) { /* Sink ASE state machine does not have Disabling state */ log::error(", invalid state transition, from: {} , to: {}", ToString(group->GetState()), ToString(group->GetTargetState())); StopStream(group); return; } switch (ase->state) { case AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING: /* TODO: Disable */ break; case AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING: SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_DISABLING); /* Remote may autonomously bring ASEs to QoS configured state */ if (group->GetTargetState() != AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED) { ProcessAutonomousDisable(group, leAudioDevice, ase); return; } /* Process the Disable Transition of the rest of group members if no * more ASE notifications has to come from this device. */ if (leAudioDevice->IsReadyToSuspendStream()) { ProcessGroupDisable(group); } break; default: log::error("invalid state transition, from: {}, to: {}", static_cast(ase->state), static_cast(AseState::BTA_LE_AUDIO_ASE_STATE_DISABLING)); StopStream(group); break; } } typedef enum { CIS_DISCONNECTED, CIS_DISCONNECTING, CIS_STILL_NEEDED, } LocalCisDisconnectResult_t; LocalCisDisconnectResult_t DisconnectCisIfNeeded(LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice, struct ase* ase) { log::debug( "Group id: {}, {}, ase id: {}, cis_handle: 0x{:04x}, direction: {}, " "data_path_state: {}, cis_state: {}", group->group_id_, leAudioDevice->address_, ase->id, ase->cis_conn_hdl, ase->direction == bluetooth::le_audio::types::kLeAudioDirectionSink ? "sink" : "source", bluetooth::common::ToString(ase->data_path_state), bluetooth::common::ToString(ase->cis_state)); if (ase->cis_state == CisState::IDLE || ase->cis_state == CisState::ASSIGNED) { return CIS_DISCONNECTED; } if (ase->cis_state == CisState::DISCONNECTING) { log::debug(" CIS is already disconnecting, nothing to do here."); return CIS_DISCONNECTING; } auto bidirection_ase = leAudioDevice->GetAseToMatchBidirectionCis(ase); if (bidirection_ase != nullptr && bidirection_ase->cis_state == CisState::CONNECTED && (bidirection_ase->state == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING || bidirection_ase->state == AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING)) { log::info("Still waiting for the bidirectional ase {} to be released ({})", bidirection_ase->id, bluetooth::common::ToString(bidirection_ase->state)); return CIS_STILL_NEEDED; } ase->cis_state = CisState::DISCONNECTING; if (bidirection_ase) { bidirection_ase->cis_state = CisState::DISCONNECTING; } group->RemoveCisFromStreamIfNeeded(leAudioDevice, ase->cis_conn_hdl); IsoManager::GetInstance()->DisconnectCis(ase->cis_conn_hdl, HCI_ERR_PEER_USER); log_history_->AddLogHistory(kLogStateMachineTag, group->group_id_, leAudioDevice->address_, kLogCisDisconnectOp + "cis_h:" + loghex(ase->cis_conn_hdl)); return CIS_DISCONNECTING; } void AseStateMachineProcessReleasing( struct bluetooth::le_audio::client_parser::ascs::ase_rsp_hdr& /*arh*/, struct ase* ase, LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice) { if (!group) { log::error("leAudioDevice doesn't belong to any group"); return; } switch (ase->state) { case AseState::BTA_LE_AUDIO_ASE_STATE_DISABLING: case AseState::BTA_LE_AUDIO_ASE_STATE_CODEC_CONFIGURED: case AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED: { SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING); if (group->HaveAllActiveDevicesAsesTheSameState( AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING)) { group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING); } bool remove_cig = (DisconnectCisIfNeeded(group, leAudioDevice, ase) == CIS_DISCONNECTED); if (remove_cig && group->cig.GetState() == CigState::CREATED && group->HaveAllCisesDisconnected() && getDeviceTryingToAttachTheStream(group) == nullptr) { RemoveCigForGroup(group); } break; } case AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING: { SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING); bool remove_cig = (DisconnectCisIfNeeded(group, leAudioDevice, ase) == CIS_DISCONNECTED); if (!group->HaveAllActiveDevicesAsesTheSameState( AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING)) { return; } group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING); if (remove_cig) { /* In the ENABLING state most probably there was no CISes created. * Make sure group is destroyed here */ RemoveCigForGroup(group); } break; } case AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING: { SetAseState(leAudioDevice, ase, AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING); /* Happens when bi-directional completive ASE releasing state came */ if (ase->cis_state == CisState::DISCONNECTING) { break; } if (ase->data_path_state == DataPathState::CONFIGURED) { RemoveDataPathByCisHandle(leAudioDevice, ase->cis_conn_hdl); } else if ((ase->cis_state == CisState::CONNECTED || ase->cis_state == CisState::CONNECTING) && ase->data_path_state == DataPathState::IDLE) { DisconnectCisIfNeeded(group, leAudioDevice, ase); } else { log::debug("Nothing to do ase data path state: {}", static_cast(ase->data_path_state)); } if (group->HaveAllActiveDevicesAsesTheSameState( AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING)) { group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING); if (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { log::info("Group {} is doing autonomous release", group->group_id_); SetTargetState(group, AseState::BTA_LE_AUDIO_ASE_STATE_IDLE); state_machine_callbacks_->StatusReportCb(group->group_id_, GroupStreamStatus::RELEASING); } } break; } default: log::error("invalid state transition, from: {}, to: {}", static_cast(ase->state), static_cast(AseState::BTA_LE_AUDIO_ASE_STATE_RELEASING)); break; } } void ProcessGroupEnable(LeAudioDeviceGroup* group) { if (group->GetState() != AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING) { /* Check if the group is ready to create stream. If not, keep waiting. */ if (!group->IsGroupReadyToCreateStream()) { log::debug("Waiting for more ASEs to be in enabling or directly in streaming state"); return; } /* Group can move to Enabling state now. */ group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_ENABLING); } /* If Target State is not streaming, then something is wrong. */ if (group->GetTargetState() != AseState::BTA_LE_AUDIO_ASE_STATE_STREAMING) { log::error(", invalid state transition, from: {} , to: {}", ToString(group->GetState()), ToString(group->GetTargetState())); StopStream(group); return; } /* Try to create CISes for the group */ if (!CisCreate(group)) { StopStream(group); } } void ProcessGroupDisable(LeAudioDeviceGroup* group) { /* Disable ASEs for next device in group. */ if (group->GetState() != AseState::BTA_LE_AUDIO_ASE_STATE_DISABLING) { if (!group->IsGroupReadyToSuspendStream()) { log::info("Waiting for all devices to be in disable state"); return; } group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_DISABLING); } /* At this point all of the active ASEs within group are disabled. As there * is no Disabling state for Sink ASE, it might happen that all of the * active ASEs are Sink ASE and will transit to QoS state. So check * the group state, because we might be ready to release data path. */ if (group->HaveAllActiveDevicesAsesTheSameState( AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED)) { group->SetState(AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED); } /* Transition to QoS configured is done by CIS disconnection */ if (group->GetTargetState() == AseState::BTA_LE_AUDIO_ASE_STATE_QOS_CONFIGURED) { ReleaseDataPath(group); } else { log::error(", invalid state transition, from: {} , to: {}", ToString(group->GetState()), ToString(group->GetTargetState())); StopStream(group); } } void ProcessAutonomousDisable(LeAudioDeviceGroup* group, LeAudioDevice* leAudioDevice, struct ase* ase) { /* If there is any streaming ASE and connected CIS, there is nothing to do. * Otherwise, Release all the ASEs. */ log::info("{}, ase {}", leAudioDevice->address_, ase->id); if (group->HaveAnyActiveDeviceInStreamingState() && !group->HaveAllCisesDisconnected()) { log::info("There is still some ASE streaming, do nothing"); return; } /* If there is no more ASEs streaming, just stop the stream */ StopStream(group); } }; } // namespace namespace bluetooth::le_audio { void LeAudioGroupStateMachine::Initialize(Callbacks* state_machine_callbacks_) { if (instance) { log::error("Already initialized"); return; } instance = new LeAudioGroupStateMachineImpl(state_machine_callbacks_); } void LeAudioGroupStateMachine::Cleanup() { if (!instance) { return; } LeAudioGroupStateMachineImpl* ptr = instance; instance = nullptr; delete ptr; } LeAudioGroupStateMachine* LeAudioGroupStateMachine::Get() { log::assert_that(instance != nullptr, "assert failed: instance != nullptr"); return instance; } } // namespace bluetooth::le_audio