| /****************************************************************************** |
| * |
| * Copyright 2018 The Android Open Source Project |
| * |
| * 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 "bta_hearing_aid_api.h" |
| |
| #include "bta_gatt_api.h" |
| #include "bta_gatt_queue.h" |
| #include "btm_int.h" |
| #include "device/include/controller.h" |
| #include "embdrv/g722/g722_enc_dec.h" |
| #include "gap_api.h" |
| #include "gatt_api.h" |
| #include "osi/include/properties.h" |
| |
| #include <base/bind.h> |
| #include <base/logging.h> |
| #include <base/strings/string_number_conversions.h> |
| #include <hardware/bt_hearing_aid.h> |
| #include <vector> |
| |
| using base::Closure; |
| using bluetooth::Uuid; |
| using bluetooth::hearing_aid::ConnectionState; |
| |
| // The MIN_CE_LEN parameter for Connection Parameters based on the current |
| // Connection Interval |
| constexpr uint16_t MIN_CE_LEN_10MS_CI = 0x0006; |
| constexpr uint16_t MIN_CE_LEN_20MS_CI = 0x000C; |
| constexpr uint16_t CONNECTION_INTERVAL_10MS_PARAM = 0x0008; |
| constexpr uint16_t CONNECTION_INTERVAL_20MS_PARAM = 0x0010; |
| |
| void btif_storage_add_hearing_aid(const HearingDevice& dev_info); |
| bool btif_storage_get_hearing_aid_prop( |
| const RawAddress& address, uint8_t* capabilities, uint64_t* hi_sync_id, |
| uint16_t* render_delay, uint16_t* preparation_delay, uint16_t* codecs); |
| |
| constexpr uint8_t CODEC_G722_16KHZ = 0x01; |
| constexpr uint8_t CODEC_G722_24KHZ = 0x02; |
| |
| // audio control point opcodes |
| constexpr uint8_t CONTROL_POINT_OP_START = 0x01; |
| constexpr uint8_t CONTROL_POINT_OP_STOP = 0x02; |
| constexpr uint8_t CONTROL_POINT_OP_STATE_CHANGE = 0x03; |
| |
| constexpr uint8_t STATE_CHANGE_OTHER_SIDE_DISCONNECTED = 0x00; |
| constexpr uint8_t STATE_CHANGE_OTHER_SIDE_CONNECTED = 0x01; |
| constexpr uint8_t STATE_CHANGE_CONN_UPDATE = 0x02; |
| |
| // used to mark current_volume as not yet known, or possibly old |
| constexpr int8_t VOLUME_UNKNOWN = 127; |
| constexpr int8_t VOLUME_MIN = -127; |
| |
| // audio type |
| constexpr uint8_t AUDIOTYPE_UNKNOWN = 0x00; |
| |
| // Status of the other side Hearing Aids device |
| constexpr uint8_t OTHER_SIDE_NOT_STREAMING = 0x00; |
| constexpr uint8_t OTHER_SIDE_IS_STREAMING = 0x01; |
| |
| // This ADD_RENDER_DELAY_INTERVALS is the number of connection intervals when |
| // the audio data packet is send by Audio Engine to when the Hearing Aids device |
| // received it from the air. We assumed that there is 2 data buffer queued from |
| // audio subsystem to bluetooth chip. Then the estimated OTA delay is two |
| // connnection intervals. |
| constexpr uint16_t ADD_RENDER_DELAY_INTERVALS = 4; |
| |
| namespace { |
| |
| // clang-format off |
| Uuid HEARING_AID_UUID = Uuid::FromString("FDF0"); |
| Uuid READ_ONLY_PROPERTIES_UUID = Uuid::FromString("6333651e-c481-4a3e-9169-7c902aad37bb"); |
| Uuid AUDIO_CONTROL_POINT_UUID = Uuid::FromString("f0d4de7e-4a88-476c-9d9f-1937b0996cc0"); |
| Uuid AUDIO_STATUS_UUID = Uuid::FromString("38663f1a-e711-4cac-b641-326b56404837"); |
| Uuid VOLUME_UUID = Uuid::FromString("00e4ca9e-ab14-41e4-8823-f9e70c7e91df"); |
| Uuid LE_PSM_UUID = Uuid::FromString("2d410339-82b6-42aa-b34e-e2e01df8cc1a"); |
| // clang-format on |
| |
| void hearingaid_gattc_callback(tBTA_GATTC_EVT event, tBTA_GATTC* p_data); |
| void encryption_callback(const RawAddress*, tGATT_TRANSPORT, void*, |
| tBTM_STATUS); |
| void read_rssi_cb(void* p_void); |
| |
| inline BT_HDR* malloc_l2cap_buf(uint16_t len) { |
| BT_HDR* msg = (BT_HDR*)osi_malloc(BT_HDR_SIZE + L2CAP_MIN_OFFSET + |
| len /* LE-only, no need for FCS here */); |
| msg->offset = L2CAP_MIN_OFFSET; |
| msg->len = len; |
| return msg; |
| } |
| |
| inline uint8_t* get_l2cap_sdu_start_ptr(BT_HDR* msg) { |
| return (uint8_t*)(msg) + BT_HDR_SIZE + L2CAP_MIN_OFFSET; |
| } |
| |
| class HearingAidImpl; |
| HearingAidImpl* instance; |
| HearingAidAudioReceiver* audioReceiver; |
| |
| class HearingDevices { |
| public: |
| void Add(HearingDevice device) { |
| if (FindByAddress(device.address) != nullptr) return; |
| |
| devices.push_back(device); |
| } |
| |
| void Remove(const RawAddress& address) { |
| for (auto it = devices.begin(); it != devices.end();) { |
| if (it->address != address) { |
| ++it; |
| continue; |
| } |
| |
| it = devices.erase(it); |
| return; |
| } |
| } |
| |
| HearingDevice* FindByAddress(const RawAddress& address) { |
| auto iter = std::find_if(devices.begin(), devices.end(), |
| [&address](const HearingDevice& device) { |
| return device.address == address; |
| }); |
| |
| return (iter == devices.end()) ? nullptr : &(*iter); |
| } |
| |
| HearingDevice* FindByConnId(uint16_t conn_id) { |
| auto iter = std::find_if(devices.begin(), devices.end(), |
| [&conn_id](const HearingDevice& device) { |
| return device.conn_id == conn_id; |
| }); |
| |
| return (iter == devices.end()) ? nullptr : &(*iter); |
| } |
| |
| HearingDevice* FindByGapHandle(uint16_t gap_handle) { |
| auto iter = std::find_if(devices.begin(), devices.end(), |
| [&gap_handle](const HearingDevice& device) { |
| return device.gap_handle == gap_handle; |
| }); |
| |
| return (iter == devices.end()) ? nullptr : &(*iter); |
| } |
| |
| bool IsAnyConnectionUpdateStarted() { |
| for (const auto& d : devices) { |
| if (d.connection_update_status == STARTED) return true; |
| } |
| |
| return false; |
| } |
| |
| void StartRssiLog() { |
| int read_rssi_start_interval_count = 0; |
| |
| for (auto& d : devices) { |
| VLOG(1) << __func__ << ": device=" << d.address << ", read_rssi_count=" << d.read_rssi_count; |
| |
| // Reset the count |
| if (d.read_rssi_count <= 0) { |
| d.read_rssi_count = READ_RSSI_NUM_TRIES; |
| d.num_intervals_since_last_rssi_read = read_rssi_start_interval_count; |
| |
| // Spaced apart the Read RSSI commands to the BT controller. |
| read_rssi_start_interval_count += PERIOD_TO_READ_RSSI_IN_INTERVALS / 2; |
| read_rssi_start_interval_count %= PERIOD_TO_READ_RSSI_IN_INTERVALS; |
| |
| std::deque<rssi_log>& rssi_logs = d.audio_stats.rssi_history; |
| if (rssi_logs.size() >= MAX_RSSI_HISTORY) { |
| rssi_logs.pop_front(); |
| } |
| rssi_logs.emplace_back(); |
| } |
| } |
| } |
| |
| size_t size() { return (devices.size()); } |
| |
| std::vector<HearingDevice> devices; |
| }; |
| |
| static void write_rpt_ctl_cfg_cb(uint16_t conn_id, tGATT_STATUS status, |
| uint16_t handle, void* data) { |
| if (status != GATT_SUCCESS) { |
| LOG(ERROR) << __func__ << ": handle=" << handle << ", conn_id=" << conn_id |
| << ", status=" << loghex(status); |
| } |
| } |
| |
| g722_encode_state_t* encoder_state_left = nullptr; |
| g722_encode_state_t* encoder_state_right = nullptr; |
| |
| inline void encoder_state_init() { |
| if (encoder_state_left != nullptr) { |
| LOG(WARNING) << __func__ << ": encoder already initialized"; |
| return; |
| } |
| encoder_state_left = g722_encode_init(nullptr, 64000, G722_PACKED); |
| encoder_state_right = g722_encode_init(nullptr, 64000, G722_PACKED); |
| } |
| |
| inline void encoder_state_release() { |
| if (encoder_state_left != nullptr) { |
| g722_encode_release(encoder_state_left); |
| encoder_state_left = nullptr; |
| g722_encode_release(encoder_state_right); |
| encoder_state_right = nullptr; |
| } |
| } |
| |
| class HearingAidImpl : public HearingAid { |
| private: |
| // Keep track of whether the Audio Service has resumed audio playback |
| bool audio_running; |
| // For Testing: overwrite the MIN_CE_LEN during connection parameter updates |
| uint16_t overwrite_min_ce_len; |
| |
| public: |
| ~HearingAidImpl() override = default; |
| |
| HearingAidImpl(bluetooth::hearing_aid::HearingAidCallbacks* callbacks, |
| Closure initCb) |
| : audio_running(false), |
| overwrite_min_ce_len(0), |
| gatt_if(0), |
| seq_counter(0), |
| current_volume(VOLUME_UNKNOWN), |
| callbacks(callbacks), |
| codec_in_use(0) { |
| default_data_interval_ms = (uint16_t)osi_property_get_int32( |
| "persist.bluetooth.hearingaid.interval", (int32_t)HA_INTERVAL_20_MS); |
| if ((default_data_interval_ms != HA_INTERVAL_10_MS) && |
| (default_data_interval_ms != HA_INTERVAL_20_MS)) { |
| LOG(ERROR) << __func__ |
| << ": invalid interval=" << default_data_interval_ms |
| << "ms. Overwriting back to default"; |
| default_data_interval_ms = HA_INTERVAL_20_MS; |
| } |
| VLOG(2) << __func__ |
| << ", default_data_interval_ms=" << default_data_interval_ms; |
| |
| overwrite_min_ce_len = (uint16_t)osi_property_get_int32( |
| "persist.bluetooth.hearingaidmincelen", 0); |
| if (overwrite_min_ce_len) { |
| LOG(INFO) << __func__ |
| << ": Overwrites MIN_CE_LEN=" << overwrite_min_ce_len; |
| } |
| |
| BTA_GATTC_AppRegister( |
| hearingaid_gattc_callback, |
| base::Bind( |
| [](Closure initCb, uint8_t client_id, uint8_t status) { |
| if (status != GATT_SUCCESS) { |
| LOG(ERROR) << "Can't start Hearing Aid profile - no gatt " |
| "clients left!"; |
| return; |
| } |
| instance->gatt_if = client_id; |
| initCb.Run(); |
| }, |
| initCb)); |
| } |
| |
| uint16_t UpdateBleConnParams(const RawAddress& address) { |
| /* List of parameters that depends on the chosen Connection Interval */ |
| uint16_t min_ce_len; |
| uint16_t connection_interval; |
| |
| switch (default_data_interval_ms) { |
| case HA_INTERVAL_10_MS: |
| min_ce_len = MIN_CE_LEN_10MS_CI; |
| connection_interval = CONNECTION_INTERVAL_10MS_PARAM; |
| break; |
| case HA_INTERVAL_20_MS: |
| min_ce_len = MIN_CE_LEN_20MS_CI; |
| connection_interval = CONNECTION_INTERVAL_20MS_PARAM; |
| break; |
| default: |
| LOG(ERROR) << __func__ << ":Error: invalid default_data_interval_ms=" |
| << default_data_interval_ms; |
| min_ce_len = MIN_CE_LEN_10MS_CI; |
| connection_interval = CONNECTION_INTERVAL_10MS_PARAM; |
| } |
| |
| if (overwrite_min_ce_len != 0) { |
| VLOG(2) << __func__ << ": min_ce_len=" << min_ce_len |
| << " is overwritten to " << overwrite_min_ce_len; |
| min_ce_len = overwrite_min_ce_len; |
| } |
| |
| L2CA_UpdateBleConnParams(address, connection_interval, connection_interval, |
| 0x000A, 0x0064 /*1s*/, min_ce_len, min_ce_len); |
| return connection_interval; |
| } |
| |
| void Connect(const RawAddress& address) override { |
| DVLOG(2) << __func__ << " " << address; |
| hearingDevices.Add(HearingDevice(address, true)); |
| BTA_GATTC_Open(gatt_if, address, true, GATT_TRANSPORT_LE, false); |
| } |
| |
| void AddToWhiteList(const RawAddress& address) override { |
| VLOG(2) << __func__ << " address: " << address; |
| hearingDevices.Add(HearingDevice(address, true)); |
| BTA_GATTC_Open(gatt_if, address, false, GATT_TRANSPORT_LE, false); |
| } |
| |
| void AddFromStorage(const HearingDevice& dev_info, uint16_t is_white_listed) { |
| DVLOG(2) << __func__ << " " << dev_info.address |
| << ", hiSyncId=" << loghex(dev_info.hi_sync_id) |
| << ", isWhiteListed=" << is_white_listed; |
| if (is_white_listed) { |
| hearingDevices.Add(dev_info); |
| |
| // TODO: we should increase the scanning window for few seconds, to get |
| // faster initial connection, same after hearing aid disconnects, i.e. |
| // BTM_BleSetConnScanParams(2048, 1024); |
| |
| /* add device into BG connection to accept remote initiated connection */ |
| BTA_GATTC_Open(gatt_if, dev_info.address, false, GATT_TRANSPORT_LE, |
| false); |
| } |
| |
| callbacks->OnDeviceAvailable(dev_info.capabilities, dev_info.hi_sync_id, |
| dev_info.address); |
| } |
| |
| int GetDeviceCount() { return (hearingDevices.size()); } |
| |
| void OnGattConnected(tGATT_STATUS status, uint16_t conn_id, |
| tGATT_IF client_if, RawAddress address, |
| tBTA_TRANSPORT transport, uint16_t mtu) { |
| VLOG(2) << __func__ << ": address=" << address << ", conn_id=" << conn_id; |
| |
| HearingDevice* hearingDevice = hearingDevices.FindByAddress(address); |
| if (!hearingDevice) { |
| /* When Hearing Aid is quickly disabled and enabled in settings, this case |
| * might happen */ |
| LOG(WARNING) << "Closing connection to non hearing-aid device, address=" |
| << address; |
| BTA_GATTC_Close(conn_id); |
| return; |
| } |
| |
| if (status != GATT_SUCCESS) { |
| if (!hearingDevice->connecting_actively) { |
| // whitelist connection failed, that's ok. |
| return; |
| } |
| |
| LOG(INFO) << "Failed to connect to Hearing Aid device"; |
| hearingDevices.Remove(address); |
| callbacks->OnConnectionState(ConnectionState::DISCONNECTED, address); |
| return; |
| } |
| |
| hearingDevice->connecting_actively = false; |
| hearingDevice->conn_id = conn_id; |
| |
| /* We must update connection parameters one at a time, otherwise anchor |
| * point (start of connection event) for two devices can be too close to |
| * each other. Here, by setting min_ce_len=max_ce_len=X, we force controller |
| * to move anchor point of both connections away from each other, to make |
| * sure we'll be able to fit all the data we want in one connection event. |
| */ |
| bool any_update_pending = hearingDevices.IsAnyConnectionUpdateStarted(); |
| // mark the device as pending connection update. If we don't start the |
| // update now, it'll be started once current device finishes. |
| if (!any_update_pending) { |
| hearingDevice->connection_update_status = STARTED; |
| hearingDevice->requested_connection_interval = |
| UpdateBleConnParams(address); |
| } else { |
| hearingDevice->connection_update_status = AWAITING; |
| } |
| |
| tACL_CONN* p_acl = btm_bda_to_acl(address, BT_TRANSPORT_LE); |
| if (p_acl != nullptr && controller_get_interface()->supports_ble_2m_phy() && |
| HCI_LE_2M_PHY_SUPPORTED(p_acl->peer_le_features)) { |
| LOG(INFO) << address << " set preferred PHY to 2M"; |
| BTM_BleSetPhy(address, PHY_LE_2M, PHY_LE_2M, 0); |
| } |
| |
| // Set data length |
| // TODO(jpawlowski: for 16khz only 87 is required, optimize |
| BTM_SetBleDataLength(address, 167); |
| |
| tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(address); |
| if (p_dev_rec) { |
| if (p_dev_rec->sec_state == BTM_SEC_STATE_ENCRYPTING || |
| p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING) { |
| /* if security collision happened, wait for encryption done |
| * (BTA_GATTC_ENC_CMPL_CB_EVT) */ |
| return; |
| } |
| } |
| |
| /* verify bond */ |
| uint8_t sec_flag = 0; |
| BTM_GetSecurityFlagsByTransport(address, &sec_flag, BT_TRANSPORT_LE); |
| |
| if (sec_flag & BTM_SEC_FLAG_ENCRYPTED) { |
| /* if link has been encrypted */ |
| OnEncryptionComplete(address, true); |
| return; |
| } |
| |
| if (sec_flag & BTM_SEC_FLAG_LKEY_KNOWN) { |
| /* if bonded and link not encrypted */ |
| sec_flag = BTM_BLE_SEC_ENCRYPT; |
| BTM_SetEncryption(address, BTA_TRANSPORT_LE, encryption_callback, nullptr, |
| sec_flag); |
| return; |
| } |
| |
| /* otherwise let it go through */ |
| OnEncryptionComplete(address, true); |
| } |
| |
| void OnConnectionUpdateComplete(uint16_t conn_id, tBTA_GATTC* p_data) { |
| HearingDevice* hearingDevice = hearingDevices.FindByConnId(conn_id); |
| if (!hearingDevice) { |
| DVLOG(2) << "Skipping unknown device, conn_id=" << loghex(conn_id); |
| return; |
| } |
| |
| if (p_data) { |
| if (p_data->conn_update.status == 0) { |
| bool same_conn_interval = |
| (hearingDevice->requested_connection_interval == |
| p_data->conn_update.interval); |
| |
| switch (hearingDevice->connection_update_status) { |
| case COMPLETED: |
| if (!same_conn_interval) { |
| LOG(WARNING) << __func__ |
| << ": Unexpected change. Redo. connection interval=" |
| << p_data->conn_update.interval << ", expected=" |
| << hearingDevice->requested_connection_interval |
| << ", conn_id=" << conn_id |
| << ", connection_update_status=" |
| << hearingDevice->connection_update_status; |
| // Redo this connection interval change. |
| hearingDevice->connection_update_status = AWAITING; |
| } |
| break; |
| case STARTED: |
| if (same_conn_interval) { |
| LOG(INFO) << __func__ |
| << ": Connection update completed. conn_id=" << conn_id |
| << ", device=" << hearingDevice->address; |
| hearingDevice->connection_update_status = COMPLETED; |
| } else { |
| LOG(WARNING) << __func__ |
| << ": Ignored. Different connection interval=" |
| << p_data->conn_update.interval << ", expected=" |
| << hearingDevice->requested_connection_interval |
| << ", conn_id=" << conn_id |
| << ", connection_update_status=" |
| << hearingDevice->connection_update_status; |
| // Wait for the right Connection Update Completion. |
| return; |
| } |
| break; |
| case AWAITING: |
| case NONE: |
| break; |
| } |
| |
| // Inform this side and other side device (if any) of Connection |
| // Updates. |
| std::vector<uint8_t> conn_update( |
| {CONTROL_POINT_OP_STATE_CHANGE, STATE_CHANGE_CONN_UPDATE, |
| (uint8_t)p_data->conn_update.interval}); |
| send_state_change_to_other_side(hearingDevice, conn_update); |
| send_state_change(hearingDevice, conn_update); |
| } else { |
| LOG(INFO) << __func__ |
| << ": error status=" << loghex(p_data->conn_update.status) |
| << ", conn_id=" << conn_id |
| << ", device=" << hearingDevice->address |
| << ", connection_update_status=" |
| << hearingDevice->connection_update_status; |
| |
| if (hearingDevice->connection_update_status == STARTED) { |
| // Redo this connection interval change. |
| LOG(ERROR) << __func__ << ": Redo Connection Interval change"; |
| hearingDevice->connection_update_status = AWAITING; |
| } |
| } |
| } else { |
| hearingDevice->connection_update_status = NONE; |
| } |
| |
| for (auto& device : hearingDevices.devices) { |
| if (device.conn_id && (device.connection_update_status == AWAITING)) { |
| device.connection_update_status = STARTED; |
| device.requested_connection_interval = |
| UpdateBleConnParams(device.address); |
| return; |
| } |
| } |
| } |
| |
| // Completion Callback for the RSSI read operation. |
| void OnReadRssiComplete(const RawAddress& address, int8_t rssi_value) { |
| HearingDevice* hearingDevice = hearingDevices.FindByAddress(address); |
| if (!hearingDevice) { |
| LOG(INFO) << "Skipping unknown device" << address; |
| return; |
| } |
| |
| VLOG(1) << __func__ << ": device=" << address << ", rssi=" << (int)rssi_value; |
| |
| if (hearingDevice->read_rssi_count <= 0) { |
| LOG(ERROR) << __func__ << ": device=" << address |
| << ", invalid read_rssi_count=" << hearingDevice->read_rssi_count; |
| return; |
| } |
| |
| rssi_log& last_log_set = hearingDevice->audio_stats.rssi_history.back(); |
| |
| if (hearingDevice->read_rssi_count == READ_RSSI_NUM_TRIES) { |
| // Store the timestamp only for the first one after packet flush |
| clock_gettime(CLOCK_REALTIME, &last_log_set.timestamp); |
| LOG(INFO) << __func__ << ": store time. device=" << address << ", rssi=" << (int)rssi_value; |
| } |
| |
| last_log_set.rssi.emplace_back(rssi_value); |
| hearingDevice->read_rssi_count--; |
| } |
| |
| void OnEncryptionComplete(const RawAddress& address, bool success) { |
| HearingDevice* hearingDevice = hearingDevices.FindByAddress(address); |
| if (!hearingDevice) { |
| DVLOG(2) << "Skipping unknown device" << address; |
| return; |
| } |
| |
| if (!success) { |
| LOG(ERROR) << "encryption failed"; |
| BTA_GATTC_Close(hearingDevice->conn_id); |
| if (hearingDevice->first_connection) { |
| callbacks->OnConnectionState(ConnectionState::DISCONNECTED, address); |
| } |
| return; |
| } |
| |
| DVLOG(2) << __func__ << " " << address; |
| |
| if (hearingDevice->audio_control_point_handle && |
| hearingDevice->audio_status_handle && |
| hearingDevice->audio_status_ccc_handle && |
| hearingDevice->volume_handle && hearingDevice->read_psm_handle) { |
| // Use cached data, jump to read PSM |
| ReadPSM(hearingDevice); |
| } else { |
| hearingDevice->first_connection = true; |
| BTA_GATTC_ServiceSearchRequest(hearingDevice->conn_id, &HEARING_AID_UUID); |
| } |
| } |
| |
| void OnServiceChangeEvent(const RawAddress& address) { |
| HearingDevice* hearingDevice = hearingDevices.FindByAddress(address); |
| if (!hearingDevice) { |
| VLOG(2) << "Skipping unknown device" << address; |
| return; |
| } |
| LOG(INFO) << __func__ << ": address=" << address; |
| hearingDevice->first_connection = true; |
| hearingDevice->service_changed_rcvd = true; |
| BtaGattQueue::Clean(hearingDevice->conn_id); |
| if (hearingDevice->gap_handle) { |
| GAP_ConnClose(hearingDevice->gap_handle); |
| hearingDevice->gap_handle = 0; |
| } |
| } |
| |
| void OnServiceDiscDoneEvent(const RawAddress& address) { |
| HearingDevice* hearingDevice = hearingDevices.FindByAddress(address); |
| if (!hearingDevice) { |
| VLOG(2) << "Skipping unknown device" << address; |
| return; |
| } |
| if (hearingDevice->service_changed_rcvd) { |
| BTA_GATTC_ServiceSearchRequest(hearingDevice->conn_id, &HEARING_AID_UUID); |
| } |
| } |
| |
| void OnServiceSearchComplete(uint16_t conn_id, tGATT_STATUS status) { |
| HearingDevice* hearingDevice = hearingDevices.FindByConnId(conn_id); |
| if (!hearingDevice) { |
| DVLOG(2) << "Skipping unknown device, conn_id=" << loghex(conn_id); |
| return; |
| } |
| |
| // Known device, nothing to do. |
| if (!hearingDevice->first_connection) return; |
| |
| if (status != GATT_SUCCESS) { |
| /* close connection and report service discovery complete with error */ |
| LOG(ERROR) << "Service discovery failed"; |
| if (hearingDevice->first_connection) { |
| callbacks->OnConnectionState(ConnectionState::DISCONNECTED, |
| hearingDevice->address); |
| } |
| return; |
| } |
| |
| const std::list<gatt::Service>* services = BTA_GATTC_GetServices(conn_id); |
| |
| const gatt::Service* service = nullptr; |
| for (const gatt::Service& tmp : *services) { |
| if (tmp.uuid == Uuid::From16Bit(UUID_SERVCLASS_GATT_SERVER)) { |
| LOG(INFO) << "Found UUID_SERVCLASS_GATT_SERVER, handle=" |
| << loghex(tmp.handle); |
| const gatt::Service* service_changed_service = &tmp; |
| find_server_changed_ccc_handle(conn_id, service_changed_service); |
| } else if (tmp.uuid == HEARING_AID_UUID) { |
| LOG(INFO) << "Found Hearing Aid service, handle=" << loghex(tmp.handle); |
| service = &tmp; |
| } |
| } |
| |
| if (!service) { |
| LOG(ERROR) << "No Hearing Aid service found"; |
| callbacks->OnConnectionState(ConnectionState::DISCONNECTED, |
| hearingDevice->address); |
| return; |
| } |
| |
| for (const gatt::Characteristic& charac : service->characteristics) { |
| if (charac.uuid == READ_ONLY_PROPERTIES_UUID) { |
| if (!btif_storage_get_hearing_aid_prop( |
| hearingDevice->address, &hearingDevice->capabilities, |
| &hearingDevice->hi_sync_id, &hearingDevice->render_delay, |
| &hearingDevice->preparation_delay, &hearingDevice->codecs)) { |
| VLOG(2) << "Reading read only properties " |
| << loghex(charac.value_handle); |
| BtaGattQueue::ReadCharacteristic( |
| conn_id, charac.value_handle, |
| HearingAidImpl::OnReadOnlyPropertiesReadStatic, nullptr); |
| } |
| } else if (charac.uuid == AUDIO_CONTROL_POINT_UUID) { |
| hearingDevice->audio_control_point_handle = charac.value_handle; |
| // store audio control point! |
| } else if (charac.uuid == AUDIO_STATUS_UUID) { |
| hearingDevice->audio_status_handle = charac.value_handle; |
| |
| hearingDevice->audio_status_ccc_handle = |
| find_ccc_handle(conn_id, charac.value_handle); |
| if (!hearingDevice->audio_status_ccc_handle) { |
| LOG(ERROR) << __func__ << ": cannot find Audio Status CCC descriptor"; |
| continue; |
| } |
| |
| LOG(INFO) << __func__ |
| << ": audio_status_handle=" << loghex(charac.value_handle) |
| << ", ccc=" << loghex(hearingDevice->audio_status_ccc_handle); |
| } else if (charac.uuid == VOLUME_UUID) { |
| hearingDevice->volume_handle = charac.value_handle; |
| } else if (charac.uuid == LE_PSM_UUID) { |
| hearingDevice->read_psm_handle = charac.value_handle; |
| } else { |
| LOG(WARNING) << "Unknown characteristic found:" << charac.uuid; |
| } |
| } |
| |
| if (hearingDevice->service_changed_rcvd) { |
| hearingDevice->service_changed_rcvd = false; |
| } |
| |
| ReadPSM(hearingDevice); |
| } |
| |
| void ReadPSM(HearingDevice* hearingDevice) { |
| if (hearingDevice->read_psm_handle) { |
| LOG(INFO) << "Reading PSM " << loghex(hearingDevice->read_psm_handle) |
| << ", device=" << hearingDevice->address; |
| BtaGattQueue::ReadCharacteristic( |
| hearingDevice->conn_id, hearingDevice->read_psm_handle, |
| HearingAidImpl::OnPsmReadStatic, nullptr); |
| } |
| } |
| |
| void OnNotificationEvent(uint16_t conn_id, uint16_t handle, uint16_t len, |
| uint8_t* value) { |
| HearingDevice* device = hearingDevices.FindByConnId(conn_id); |
| if (!device) { |
| LOG(INFO) << __func__ |
| << ": Skipping unknown device, conn_id=" << loghex(conn_id); |
| return; |
| } |
| |
| if (device->audio_status_handle != handle) { |
| LOG(INFO) << __func__ << ": Mismatched handle, " |
| << loghex(device->audio_status_handle) |
| << "!=" << loghex(handle); |
| return; |
| } |
| |
| if (len < 1) { |
| LOG(ERROR) << __func__ << ": Data Length too small, len=" << len |
| << ", expecting at least 1"; |
| return; |
| } |
| |
| if (value[0] != 0) { |
| LOG(INFO) << __func__ |
| << ": Invalid returned status. data=" << loghex(value[0]); |
| return; |
| } |
| |
| LOG(INFO) << __func__ |
| << ": audio status success notification. command_acked=" |
| << device->command_acked; |
| device->command_acked = true; |
| } |
| |
| void OnReadOnlyPropertiesRead(uint16_t conn_id, tGATT_STATUS status, |
| uint16_t handle, uint16_t len, uint8_t* value, |
| void* data) { |
| HearingDevice* hearingDevice = hearingDevices.FindByConnId(conn_id); |
| if (!hearingDevice) { |
| DVLOG(2) << __func__ << "unknown conn_id=" << loghex(conn_id); |
| return; |
| } |
| |
| VLOG(2) << __func__ << " " << base::HexEncode(value, len); |
| |
| uint8_t* p = value; |
| |
| uint8_t version; |
| STREAM_TO_UINT8(version, p); |
| |
| if (version != 0x01) { |
| LOG(WARNING) << "Unknown version: " << loghex(version); |
| return; |
| } |
| |
| // version 0x01 of read only properties: |
| if (len < 17) { |
| LOG(WARNING) << "Read only properties too short: " << loghex(len); |
| return; |
| } |
| uint8_t capabilities; |
| STREAM_TO_UINT8(capabilities, p); |
| hearingDevice->capabilities = capabilities; |
| bool side = capabilities & CAPABILITY_SIDE; |
| bool standalone = capabilities & CAPABILITY_BINAURAL; |
| VLOG(2) << __func__ << " capabilities: " << (side ? "right" : "left") |
| << ", " << (standalone ? "binaural" : "monaural"); |
| |
| if (capabilities & CAPABILITY_RESERVED) { |
| LOG(WARNING) << __func__ << " reserved capabilities are set"; |
| } |
| |
| STREAM_TO_UINT64(hearingDevice->hi_sync_id, p); |
| VLOG(2) << __func__ << " hiSyncId: " << loghex(hearingDevice->hi_sync_id); |
| uint8_t feature_map; |
| STREAM_TO_UINT8(feature_map, p); |
| |
| STREAM_TO_UINT16(hearingDevice->render_delay, p); |
| VLOG(2) << __func__ |
| << " render delay: " << loghex(hearingDevice->render_delay); |
| |
| STREAM_TO_UINT16(hearingDevice->preparation_delay, p); |
| VLOG(2) << __func__ << " preparation delay: " |
| << loghex(hearingDevice->preparation_delay); |
| |
| uint16_t codecs; |
| STREAM_TO_UINT16(codecs, p); |
| hearingDevice->codecs = codecs; |
| VLOG(2) << __func__ << " supported codecs: " << loghex(codecs); |
| if (codecs & (1 << CODEC_G722_16KHZ)) VLOG(2) << "\tG722@16kHz"; |
| if (codecs & (1 << CODEC_G722_24KHZ)) VLOG(2) << "\tG722@24kHz"; |
| |
| if (!(codecs & (1 << CODEC_G722_16KHZ))) { |
| LOG(WARNING) << __func__ << " Mandatory codec, G722@16kHz not supported"; |
| } |
| } |
| |
| uint16_t CalcCompressedAudioPacketSize(uint16_t codec_type, |
| int connection_interval) { |
| int sample_rate; |
| |
| const int sample_bit_rate = 16; /* 16 bits per sample */ |
| const int compression_ratio = 4; /* G.722 has a 4:1 compression ratio */ |
| if (codec_type == CODEC_G722_24KHZ) { |
| sample_rate = 24000; |
| } else { |
| sample_rate = 16000; |
| } |
| |
| // compressed_data_packet_size is the size in bytes of the compressed audio |
| // data buffer that is generated for each connection interval. |
| uint32_t compressed_data_packet_size = |
| (sample_rate * connection_interval * (sample_bit_rate / 8) / |
| compression_ratio) / |
| 1000; |
| return ((uint16_t)compressed_data_packet_size); |
| } |
| |
| void ChooseCodec(const HearingDevice& hearingDevice) { |
| if (codec_in_use) return; |
| |
| // use the best codec available for this pair of devices. |
| uint16_t codecs = hearingDevice.codecs; |
| if (hearingDevice.hi_sync_id != 0) { |
| for (const auto& device : hearingDevices.devices) { |
| if (device.hi_sync_id != hearingDevice.hi_sync_id) continue; |
| |
| codecs &= device.codecs; |
| } |
| } |
| |
| if ((codecs & (1 << CODEC_G722_24KHZ)) && |
| controller_get_interface()->supports_ble_2m_phy() && |
| default_data_interval_ms == HA_INTERVAL_10_MS) { |
| codec_in_use = CODEC_G722_24KHZ; |
| } else if (codecs & (1 << CODEC_G722_16KHZ)) { |
| codec_in_use = CODEC_G722_16KHZ; |
| } |
| } |
| |
| void OnAudioStatus(uint16_t conn_id, tGATT_STATUS status, uint16_t handle, |
| uint16_t len, uint8_t* value, void* data) { |
| LOG(INFO) << __func__ << " " << base::HexEncode(value, len); |
| } |
| |
| void OnPsmRead(uint16_t conn_id, tGATT_STATUS status, uint16_t handle, |
| uint16_t len, uint8_t* value, void* data) { |
| HearingDevice* hearingDevice = hearingDevices.FindByConnId(conn_id); |
| if (!hearingDevice) { |
| DVLOG(2) << "Skipping unknown read event, conn_id=" << loghex(conn_id); |
| return; |
| } |
| |
| if (status != GATT_SUCCESS) { |
| LOG(ERROR) << "Error reading PSM for device" << hearingDevice->address; |
| return; |
| } |
| |
| if (len > 2) { |
| LOG(ERROR) << "Bad PSM length"; |
| return; |
| } |
| |
| uint16_t psm = *((uint16_t*)value); |
| VLOG(2) << "read psm:" << loghex(psm); |
| |
| ConnectSocket(hearingDevice, psm); |
| } |
| |
| void ConnectSocket(HearingDevice* hearingDevice, uint16_t psm) { |
| tL2CAP_CFG_INFO cfg_info = tL2CAP_CFG_INFO{.mtu = 512}; |
| |
| SendEnableServiceChangedInd(hearingDevice); |
| |
| uint8_t service_id = hearingDevice->isLeft() |
| ? BTM_SEC_SERVICE_HEARING_AID_LEFT |
| : BTM_SEC_SERVICE_HEARING_AID_RIGHT; |
| uint16_t gap_handle = GAP_ConnOpen( |
| "", service_id, false, &hearingDevice->address, psm, 514 /* MPS */, |
| &cfg_info, nullptr, BTM_SEC_NONE /* TODO: request security ? */, |
| L2CAP_FCR_LE_COC_MODE, HearingAidImpl::GapCallbackStatic, |
| BT_TRANSPORT_LE); |
| if (gap_handle == GAP_INVALID_HANDLE) { |
| LOG(ERROR) << "UNABLE TO GET gap_handle"; |
| return; |
| } |
| |
| hearingDevice->gap_handle = gap_handle; |
| LOG(INFO) << "Successfully sent GAP connect request"; |
| } |
| |
| static void OnReadOnlyPropertiesReadStatic(uint16_t conn_id, |
| tGATT_STATUS status, |
| uint16_t handle, uint16_t len, |
| uint8_t* value, void* data) { |
| if (instance) |
| instance->OnReadOnlyPropertiesRead(conn_id, status, handle, len, value, |
| data); |
| } |
| static void OnAudioStatusStatic(uint16_t conn_id, tGATT_STATUS status, |
| uint16_t handle, uint16_t len, uint8_t* value, |
| void* data) { |
| if (instance) |
| instance->OnAudioStatus(conn_id, status, handle, len, value, data); |
| } |
| |
| static void OnPsmReadStatic(uint16_t conn_id, tGATT_STATUS status, |
| uint16_t handle, uint16_t len, uint8_t* value, |
| void* data) { |
| if (instance) |
| instance->OnPsmRead(conn_id, status, handle, len, value, data); |
| } |
| |
| /* CoC Socket is ready */ |
| void OnGapConnection(const RawAddress& address) { |
| HearingDevice* hearingDevice = hearingDevices.FindByAddress(address); |
| if (!hearingDevice) { |
| LOG(INFO) << "Device not connected to profile" << address; |
| return; |
| } |
| |
| if (hearingDevice->first_connection) { |
| /* add device into BG connection to accept remote initiated connection */ |
| BTA_GATTC_Open(gatt_if, address, false, GATT_TRANSPORT_LE, false); |
| |
| btif_storage_add_hearing_aid(*hearingDevice); |
| |
| hearingDevice->first_connection = false; |
| } |
| |
| LOG(INFO) << __func__ << ": audio_status_handle=" |
| << loghex(hearingDevice->audio_status_handle) |
| << ", audio_status_ccc_handle=" |
| << loghex(hearingDevice->audio_status_ccc_handle); |
| |
| /* Register and enable the Audio Status Notification */ |
| tGATT_STATUS register_status; |
| register_status = BTA_GATTC_RegisterForNotifications( |
| gatt_if, address, hearingDevice->audio_status_handle); |
| if (register_status != GATT_SUCCESS) { |
| LOG(ERROR) << __func__ |
| << ": BTA_GATTC_RegisterForNotifications failed, status=" |
| << loghex(register_status); |
| return; |
| } |
| std::vector<uint8_t> value(2); |
| uint8_t* ptr = value.data(); |
| UINT16_TO_STREAM(ptr, GATT_CHAR_CLIENT_CONFIG_NOTIFICATION); |
| BtaGattQueue::WriteDescriptor( |
| hearingDevice->conn_id, hearingDevice->audio_status_ccc_handle, |
| std::move(value), GATT_WRITE, write_rpt_ctl_cfg_cb, nullptr); |
| |
| ChooseCodec(*hearingDevice); |
| |
| SendStart(hearingDevice); |
| |
| if (audio_running) { |
| // Inform the other side (if any) of this connection |
| std::vector<uint8_t> inform_conn_state( |
| {CONTROL_POINT_OP_STATE_CHANGE, STATE_CHANGE_OTHER_SIDE_CONNECTED}); |
| send_state_change_to_other_side(hearingDevice, inform_conn_state); |
| } |
| |
| hearingDevice->accepting_audio = true; |
| LOG(INFO) << __func__ << ": address=" << address |
| << ", hi_sync_id=" << loghex(hearingDevice->hi_sync_id) |
| << ", codec_in_use=" << loghex(codec_in_use) |
| << ", audio_running=" << audio_running; |
| |
| StartSendingAudio(*hearingDevice); |
| |
| callbacks->OnDeviceAvailable(hearingDevice->capabilities, |
| hearingDevice->hi_sync_id, address); |
| callbacks->OnConnectionState(ConnectionState::CONNECTED, address); |
| } |
| |
| void StartSendingAudio(const HearingDevice& hearingDevice) { |
| VLOG(0) << __func__ << ": device=" << hearingDevice.address; |
| |
| if (encoder_state_left == nullptr) { |
| encoder_state_init(); |
| seq_counter = 0; |
| |
| // use the best codec avaliable for this pair of devices. |
| uint16_t codecs = hearingDevice.codecs; |
| if (hearingDevice.hi_sync_id != 0) { |
| for (const auto& device : hearingDevices.devices) { |
| if (device.hi_sync_id != hearingDevice.hi_sync_id) continue; |
| |
| codecs &= device.codecs; |
| } |
| } |
| |
| CodecConfiguration codec; |
| if (codec_in_use == CODEC_G722_24KHZ) { |
| codec.sample_rate = 24000; |
| } else { |
| codec.sample_rate = 16000; |
| } |
| codec.bit_rate = 16; |
| codec.data_interval_ms = default_data_interval_ms; |
| |
| uint16_t delay_report_ms = 0; |
| if (hearingDevice.render_delay != 0) { |
| delay_report_ms = |
| hearingDevice.render_delay + |
| (ADD_RENDER_DELAY_INTERVALS * default_data_interval_ms); |
| } |
| |
| HearingAidAudioSource::Start(codec, audioReceiver, delay_report_ms); |
| } |
| } |
| |
| void OnAudioSuspend(const std::function<void()>& stop_audio_ticks) { |
| CHECK(stop_audio_ticks) << "stop_audio_ticks is empty"; |
| |
| if (!audio_running) { |
| LOG(WARNING) << __func__ << ": Unexpected audio suspend"; |
| } else { |
| LOG(INFO) << __func__ << ": audio_running=" << audio_running; |
| } |
| audio_running = false; |
| stop_audio_ticks(); |
| |
| std::vector<uint8_t> stop({CONTROL_POINT_OP_STOP}); |
| for (auto& device : hearingDevices.devices) { |
| if (!device.accepting_audio) continue; |
| |
| if (!device.playback_started) { |
| LOG(WARNING) << __func__ |
| << ": Playback not started, skip send Stop cmd, device=" |
| << device.address; |
| } else { |
| LOG(INFO) << __func__ << ": send Stop cmd, device=" << device.address; |
| device.playback_started = false; |
| device.command_acked = false; |
| BtaGattQueue::WriteCharacteristic(device.conn_id, |
| device.audio_control_point_handle, |
| stop, GATT_WRITE, nullptr, nullptr); |
| } |
| } |
| } |
| |
| void OnAudioResume(const std::function<void()>& start_audio_ticks) { |
| CHECK(start_audio_ticks) << "start_audio_ticks is empty"; |
| |
| if (audio_running) { |
| LOG(ERROR) << __func__ << ": Unexpected Audio Resume"; |
| } else { |
| LOG(INFO) << __func__ << ": audio_running=" << audio_running; |
| } |
| |
| for (auto& device : hearingDevices.devices) { |
| if (!device.accepting_audio) continue; |
| audio_running = true; |
| SendStart(&device); |
| } |
| |
| if (!audio_running) { |
| LOG(INFO) << __func__ << ": No device (0/" << GetDeviceCount() |
| << ") ready to start"; |
| return; |
| } |
| |
| // TODO: shall we also reset the encoder ? |
| encoder_state_release(); |
| encoder_state_init(); |
| seq_counter = 0; |
| |
| start_audio_ticks(); |
| } |
| |
| uint8_t GetOtherSideStreamStatus(HearingDevice* this_side_device) { |
| for (auto& device : hearingDevices.devices) { |
| if ((device.address == this_side_device->address) || |
| (device.hi_sync_id != this_side_device->hi_sync_id)) { |
| continue; |
| } |
| if (audio_running && (device.conn_id != 0)) { |
| return (OTHER_SIDE_IS_STREAMING); |
| } else { |
| return (OTHER_SIDE_NOT_STREAMING); |
| } |
| } |
| return (OTHER_SIDE_NOT_STREAMING); |
| } |
| |
| void SendEnableServiceChangedInd(HearingDevice* device) { |
| VLOG(2) << __func__ << " Enable " << device->address |
| << "service changed ind."; |
| std::vector<uint8_t> value(2); |
| uint8_t* ptr = value.data(); |
| UINT16_TO_STREAM(ptr, GATT_CHAR_CLIENT_CONFIG_INDICTION); |
| BtaGattQueue::WriteDescriptor( |
| device->conn_id, device->service_changed_ccc_handle, std::move(value), |
| GATT_WRITE, nullptr, nullptr); |
| } |
| |
| void SendStart(HearingDevice* device) { |
| std::vector<uint8_t> start({CONTROL_POINT_OP_START, codec_in_use, |
| AUDIOTYPE_UNKNOWN, (uint8_t)current_volume, |
| OTHER_SIDE_NOT_STREAMING}); |
| |
| if (!audio_running) { |
| if (!device->playback_started) { |
| LOG(INFO) << __func__ |
| << ": Skip Send Start since audio is not running, device=" |
| << device->address; |
| } else { |
| LOG(ERROR) << __func__ |
| << ": Audio not running but Playback has started, device=" |
| << device->address; |
| } |
| return; |
| } |
| |
| if (current_volume == VOLUME_UNKNOWN) start[3] = (uint8_t)VOLUME_MIN; |
| |
| if (device->playback_started) { |
| LOG(ERROR) << __func__ |
| << ": Playback already started, skip send Start cmd, device=" |
| << device->address; |
| } else { |
| start[4] = GetOtherSideStreamStatus(device); |
| LOG(INFO) << __func__ << ": send Start cmd, volume=" << loghex(start[3]) |
| << ", audio type=" << loghex(start[2]) |
| << ", device=" << device->address |
| << ", other side streaming=" << loghex(start[4]); |
| device->playback_started = true; |
| device->command_acked = false; |
| BtaGattQueue::WriteCharacteristic(device->conn_id, |
| device->audio_control_point_handle, |
| start, GATT_WRITE, nullptr, nullptr); |
| } |
| } |
| |
| void OnAudioDataReady(const std::vector<uint8_t>& data) { |
| /* For now we assume data comes in as 16bit per sample 16kHz PCM stereo */ |
| DVLOG(2) << __func__; |
| |
| int num_samples = |
| data.size() / (2 /*bytes_per_sample*/ * 2 /*number of channels*/); |
| |
| // The G.722 codec accept only even number of samples for encoding |
| if (num_samples % 2 != 0) |
| LOG(FATAL) << "num_samples is not even: " << num_samples; |
| |
| // TODO: we should cache left/right and current state, instad of recomputing |
| // it for each packet, 100 times a second. |
| HearingDevice* left = nullptr; |
| HearingDevice* right = nullptr; |
| for (auto& device : hearingDevices.devices) { |
| if (!device.accepting_audio) continue; |
| |
| if (device.isLeft()) |
| left = &device; |
| else |
| right = &device; |
| } |
| |
| if (left == nullptr && right == nullptr) { |
| LOG(WARNING) << __func__ << ": No more (0/" << GetDeviceCount() |
| << ") devices ready"; |
| DoDisconnectAudioStop(); |
| return; |
| } |
| |
| std::vector<uint16_t> chan_left; |
| std::vector<uint16_t> chan_right; |
| if (left == nullptr || right == nullptr) { |
| for (int i = 0; i < num_samples; i++) { |
| const uint8_t* sample = data.data() + i * 4; |
| |
| int16_t left = (int16_t)((*(sample + 1) << 8) + *sample) >> 1; |
| |
| sample += 2; |
| int16_t right = (int16_t)((*(sample + 1) << 8) + *sample) >> 1; |
| |
| uint16_t mono_data = (int16_t)(((uint32_t)left + (uint32_t)right) >> 1); |
| chan_left.push_back(mono_data); |
| chan_right.push_back(mono_data); |
| } |
| } else { |
| for (int i = 0; i < num_samples; i++) { |
| const uint8_t* sample = data.data() + i * 4; |
| |
| uint16_t left = (int16_t)((*(sample + 1) << 8) + *sample) >> 1; |
| chan_left.push_back(left); |
| |
| sample += 2; |
| uint16_t right = (int16_t)((*(sample + 1) << 8) + *sample) >> 1; |
| chan_right.push_back(right); |
| } |
| } |
| |
| // TODO: monural, binarual check |
| |
| // divide encoded data into packets, add header, send. |
| |
| // TODO: make those buffers static and global to prevent constant |
| // reallocations |
| // TODO: this should basically fit the encoded data, tune the size later |
| std::vector<uint8_t> encoded_data_left; |
| if (left) { |
| // TODO: instead of a magic number, we need to figure out the correct |
| // buffer size |
| encoded_data_left.resize(4000); |
| int encoded_size = |
| g722_encode(encoder_state_left, encoded_data_left.data(), |
| (const int16_t*)chan_left.data(), chan_left.size()); |
| encoded_data_left.resize(encoded_size); |
| |
| uint16_t cid = GAP_ConnGetL2CAPCid(left->gap_handle); |
| uint16_t packets_to_flush = L2CA_FlushChannel(cid, L2CAP_FLUSH_CHANS_GET); |
| if (packets_to_flush) { |
| VLOG(2) << left->address << " skipping " << packets_to_flush |
| << " packets"; |
| left->audio_stats.packet_flush_count += packets_to_flush; |
| left->audio_stats.frame_flush_count++; |
| hearingDevices.StartRssiLog(); |
| } |
| // flush all packets stuck in queue |
| L2CA_FlushChannel(cid, 0xffff); |
| check_and_do_rssi_read(left); |
| } |
| |
| std::vector<uint8_t> encoded_data_right; |
| if (right) { |
| // TODO: instead of a magic number, we need to figure out the correct |
| // buffer size |
| encoded_data_right.resize(4000); |
| int encoded_size = |
| g722_encode(encoder_state_right, encoded_data_right.data(), |
| (const int16_t*)chan_right.data(), chan_right.size()); |
| encoded_data_right.resize(encoded_size); |
| |
| uint16_t cid = GAP_ConnGetL2CAPCid(right->gap_handle); |
| uint16_t packets_to_flush = L2CA_FlushChannel(cid, L2CAP_FLUSH_CHANS_GET); |
| if (packets_to_flush) { |
| VLOG(2) << right->address << " skipping " << packets_to_flush |
| << " packets"; |
| right->audio_stats.packet_flush_count += packets_to_flush; |
| right->audio_stats.frame_flush_count++; |
| hearingDevices.StartRssiLog(); |
| } |
| // flush all packets stuck in queue |
| L2CA_FlushChannel(cid, 0xffff); |
| check_and_do_rssi_read(right); |
| } |
| |
| size_t encoded_data_size = |
| std::max(encoded_data_left.size(), encoded_data_right.size()); |
| |
| uint16_t packet_size = |
| CalcCompressedAudioPacketSize(codec_in_use, default_data_interval_ms); |
| |
| for (size_t i = 0; i < encoded_data_size; i += packet_size) { |
| if (left) { |
| left->audio_stats.packet_send_count++; |
| SendAudio(encoded_data_left.data() + i, packet_size, left); |
| } |
| if (right) { |
| right->audio_stats.packet_send_count++; |
| SendAudio(encoded_data_right.data() + i, packet_size, right); |
| } |
| seq_counter++; |
| } |
| if (left) left->audio_stats.frame_send_count++; |
| if (right) right->audio_stats.frame_send_count++; |
| } |
| |
| void SendAudio(uint8_t* encoded_data, uint16_t packet_size, |
| HearingDevice* hearingAid) { |
| if (!hearingAid->playback_started || !hearingAid->command_acked) { |
| VLOG(2) << __func__ |
| << ": Playback stalled, device=" << hearingAid->address |
| << ", cmd send=" << hearingAid->playback_started |
| << ", cmd acked=" << hearingAid->command_acked; |
| return; |
| } |
| |
| BT_HDR* audio_packet = malloc_l2cap_buf(packet_size + 1); |
| uint8_t* p = get_l2cap_sdu_start_ptr(audio_packet); |
| *p = seq_counter; |
| p++; |
| memcpy(p, encoded_data, packet_size); |
| |
| DVLOG(2) << hearingAid->address << " : " << base::HexEncode(p, packet_size); |
| |
| uint16_t result = GAP_ConnWriteData(hearingAid->gap_handle, audio_packet); |
| |
| if (result != BT_PASS) { |
| LOG(ERROR) << " Error sending data: " << loghex(result); |
| } |
| } |
| |
| void GapCallback(uint16_t gap_handle, uint16_t event, tGAP_CB_DATA* data) { |
| HearingDevice* hearingDevice = hearingDevices.FindByGapHandle(gap_handle); |
| if (!hearingDevice) { |
| LOG(INFO) << "Skipping unknown device, gap_handle=" << gap_handle; |
| return; |
| } |
| |
| switch (event) { |
| case GAP_EVT_CONN_OPENED: { |
| RawAddress address = *GAP_ConnGetRemoteAddr(gap_handle); |
| uint16_t tx_mtu = GAP_ConnGetRemMtuSize(gap_handle); |
| |
| LOG(INFO) << "GAP_EVT_CONN_OPENED " << address << ", tx_mtu=" << tx_mtu; |
| OnGapConnection(address); |
| break; |
| } |
| |
| // TODO: handle properly! |
| case GAP_EVT_CONN_CLOSED: |
| LOG(INFO) << __func__ |
| << ": GAP_EVT_CONN_CLOSED: " << hearingDevice->address |
| << ", playback_started=" << hearingDevice->playback_started; |
| hearingDevice->accepting_audio = false; |
| hearingDevice->gap_handle = 0; |
| hearingDevice->playback_started = false; |
| hearingDevice->command_acked = false; |
| break; |
| case GAP_EVT_CONN_DATA_AVAIL: { |
| DVLOG(2) << "GAP_EVT_CONN_DATA_AVAIL"; |
| |
| // only data we receive back from hearing aids are some stats, not |
| // really important, but useful now for debugging. |
| uint32_t bytes_to_read = 0; |
| GAP_GetRxQueueCnt(gap_handle, &bytes_to_read); |
| std::vector<uint8_t> buffer(bytes_to_read); |
| |
| uint16_t bytes_read = 0; |
| // TODO:GAP_ConnReadData should accpet uint32_t for length! |
| GAP_ConnReadData(gap_handle, buffer.data(), buffer.size(), &bytes_read); |
| |
| if (bytes_read < 4) { |
| LOG(WARNING) << " Wrong data length"; |
| return; |
| } |
| |
| uint8_t* p = buffer.data(); |
| |
| DVLOG(1) << "stats from the hearing aid:"; |
| for (size_t i = 0; i + 4 <= buffer.size(); i += 4) { |
| uint16_t event_counter, frame_index; |
| STREAM_TO_UINT16(event_counter, p); |
| STREAM_TO_UINT16(frame_index, p); |
| DVLOG(1) << "event_counter=" << event_counter |
| << " frame_index: " << frame_index; |
| } |
| break; |
| } |
| |
| case GAP_EVT_TX_EMPTY: |
| DVLOG(2) << "GAP_EVT_TX_EMPTY"; |
| break; |
| case GAP_EVT_CONN_CONGESTED: |
| DVLOG(2) << "GAP_EVT_CONN_CONGESTED"; |
| |
| // TODO: make it into function |
| HearingAidAudioSource::Stop(); |
| // TODO: kill the encoder only if all hearing aids are down. |
| // g722_encode_release(encoder_state); |
| // encoder_state_left = nulllptr; |
| // encoder_state_right = nulllptr; |
| break; |
| case GAP_EVT_CONN_UNCONGESTED: |
| DVLOG(2) << "GAP_EVT_CONN_UNCONGESTED"; |
| break; |
| |
| case GAP_EVT_LE_COC_CREDITS: { |
| auto& tmp = data->coc_credits; |
| DVLOG(2) << "GAP_EVT_LE_COC_CREDITS, for device: " |
| << hearingDevice->address << " added" << tmp.credits_received |
| << " credit_count: " << tmp.credit_count; |
| break; |
| } |
| } |
| } |
| |
| static void GapCallbackStatic(uint16_t gap_handle, uint16_t event, |
| tGAP_CB_DATA* data) { |
| if (instance) instance->GapCallback(gap_handle, event, data); |
| } |
| |
| void DumpRssi(int fd, const HearingDevice& device) { |
| const struct AudioStats* stats = &device.audio_stats; |
| |
| if (stats->rssi_history.size() <= 0) { |
| dprintf(fd, " No RSSI history for %s:\n", device.address.ToString().c_str()); |
| return; |
| } |
| dprintf(fd, " RSSI history for %s:\n", device.address.ToString().c_str()); |
| |
| dprintf(fd, " Time of RSSI 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9\n"); |
| for (auto& rssi_logs : stats->rssi_history) { |
| if (rssi_logs.rssi.size() <= 0) { |
| break; |
| } |
| |
| char eventtime[20]; |
| char temptime[20]; |
| struct tm* tstamp = localtime(&rssi_logs.timestamp.tv_sec); |
| if (!strftime(temptime, sizeof(temptime), "%H:%M:%S", tstamp)) { |
| LOG(ERROR) << __func__ << ": strftime fails. tm_sec=" << tstamp->tm_sec << ", tm_min=" << tstamp->tm_min |
| << ", tm_hour=" << tstamp->tm_hour; |
| strlcpy(temptime, "UNKNOWN TIME", sizeof(temptime)); |
| } |
| snprintf(eventtime, sizeof(eventtime), "%s.%03ld", temptime, rssi_logs.timestamp.tv_nsec / 1000000); |
| |
| dprintf(fd, " %s: ", eventtime); |
| |
| for (auto rssi_value : rssi_logs.rssi) { |
| dprintf(fd, " %04d", rssi_value); |
| } |
| dprintf(fd, "\n"); |
| } |
| } |
| |
| void Dump(int fd) { |
| std::stringstream stream; |
| for (const auto& device : hearingDevices.devices) { |
| bool side = device.capabilities & CAPABILITY_SIDE; |
| bool standalone = device.capabilities & CAPABILITY_BINAURAL; |
| stream << " " << device.address.ToString() << " " |
| << (device.accepting_audio ? "" : "not ") << "connected" |
| << "\n " << (standalone ? "binaural" : "monaural") << " " |
| << (side ? "right" : "left") << " " << loghex(device.hi_sync_id) |
| << std::endl; |
| stream |
| << " Packet counts (enqueued/flushed) : " |
| << device.audio_stats.packet_send_count << " / " |
| << device.audio_stats.packet_flush_count |
| << "\n Frame counts (enqueued/flushed) : " |
| << device.audio_stats.frame_send_count << " / " |
| << device.audio_stats.frame_flush_count << std::endl; |
| |
| DumpRssi(fd, device); |
| } |
| dprintf(fd, "%s", stream.str().c_str()); |
| } |
| |
| void Disconnect(const RawAddress& address) override { |
| DVLOG(2) << __func__; |
| HearingDevice* hearingDevice = hearingDevices.FindByAddress(address); |
| if (!hearingDevice) { |
| LOG(INFO) << "Device not connected to profile" << address; |
| return; |
| } |
| |
| VLOG(2) << __func__ << ": " << address; |
| |
| bool connected = hearingDevice->accepting_audio; |
| |
| LOG(INFO) << "GAP_EVT_CONN_CLOSED: " << hearingDevice->address |
| << ", playback_started=" << hearingDevice->playback_started |
| << ", accepting_audio=" << hearingDevice->accepting_audio; |
| |
| if (hearingDevice->connecting_actively) { |
| // cancel pending direct connect |
| BTA_GATTC_CancelOpen(gatt_if, address, true); |
| } |
| |
| // Removes all registrations for connection. |
| BTA_GATTC_CancelOpen(0, address, false); |
| |
| // Inform the other side (if any) of this disconnection |
| std::vector<uint8_t> inform_disconn_state( |
| {CONTROL_POINT_OP_STATE_CHANGE, STATE_CHANGE_OTHER_SIDE_DISCONNECTED}); |
| send_state_change_to_other_side(hearingDevice, inform_disconn_state); |
| |
| DoDisconnectCleanUp(hearingDevice); |
| |
| hearingDevices.Remove(address); |
| |
| if (!connected) { |
| return; |
| } |
| |
| callbacks->OnConnectionState(ConnectionState::DISCONNECTED, address); |
| for (const auto& device : hearingDevices.devices) { |
| if (device.accepting_audio) return; |
| } |
| LOG(INFO) << __func__ << ": No more (0/" << GetDeviceCount() |
| << ") devices ready"; |
| DoDisconnectAudioStop(); |
| } |
| |
| void OnGattDisconnected(tGATT_STATUS status, uint16_t conn_id, |
| tGATT_IF client_if, RawAddress remote_bda, |
| tBTA_GATT_REASON reason) { |
| HearingDevice* hearingDevice = hearingDevices.FindByConnId(conn_id); |
| if (!hearingDevice) { |
| VLOG(2) << "Skipping unknown device disconnect, conn_id=" |
| << loghex(conn_id); |
| return; |
| } |
| VLOG(2) << __func__ << ": conn_id=" << loghex(conn_id) |
| << ", reason=" << loghex(reason) << ", remote_bda=" << remote_bda; |
| |
| // Inform the other side (if any) of this disconnection |
| std::vector<uint8_t> inform_disconn_state( |
| {CONTROL_POINT_OP_STATE_CHANGE, STATE_CHANGE_OTHER_SIDE_DISCONNECTED}); |
| send_state_change_to_other_side(hearingDevice, inform_disconn_state); |
| |
| DoDisconnectCleanUp(hearingDevice); |
| |
| // Keep this hearing aid in the list, and allow to reconnect back. |
| |
| callbacks->OnConnectionState(ConnectionState::DISCONNECTED, remote_bda); |
| |
| for (const auto& device : hearingDevices.devices) { |
| if (device.accepting_audio) return; |
| } |
| LOG(INFO) << __func__ << ": No more (0/" << GetDeviceCount() |
| << ") devices ready"; |
| DoDisconnectAudioStop(); |
| } |
| |
| void DoDisconnectCleanUp(HearingDevice* hearingDevice) { |
| if (hearingDevice->connection_update_status != COMPLETED) { |
| LOG(INFO) << __func__ << ": connection update not completed. Current=" |
| << hearingDevice->connection_update_status |
| << ", device=" << hearingDevice->address; |
| |
| if (hearingDevice->connection_update_status == STARTED) { |
| OnConnectionUpdateComplete(hearingDevice->conn_id, NULL); |
| } |
| } |
| hearingDevice->connection_update_status = NONE; |
| |
| if (hearingDevice->conn_id) { |
| BtaGattQueue::Clean(hearingDevice->conn_id); |
| BTA_GATTC_Close(hearingDevice->conn_id); |
| hearingDevice->conn_id = 0; |
| } |
| |
| if (hearingDevice->gap_handle) { |
| GAP_ConnClose(hearingDevice->gap_handle); |
| hearingDevice->gap_handle = 0; |
| } |
| |
| hearingDevice->accepting_audio = false; |
| LOG(INFO) << __func__ << ": device=" << hearingDevice->address |
| << ", playback_started=" << hearingDevice->playback_started; |
| hearingDevice->playback_started = false; |
| hearingDevice->command_acked = false; |
| } |
| |
| void DoDisconnectAudioStop() { |
| HearingAidAudioSource::Stop(); |
| audio_running = false; |
| encoder_state_release(); |
| current_volume = VOLUME_UNKNOWN; |
| } |
| |
| void SetVolume(int8_t volume) override { |
| VLOG(2) << __func__ << ": " << +volume; |
| current_volume = volume; |
| for (HearingDevice& device : hearingDevices.devices) { |
| if (!device.accepting_audio) continue; |
| |
| std::vector<uint8_t> volume_value({static_cast<unsigned char>(volume)}); |
| BtaGattQueue::WriteCharacteristic(device.conn_id, device.volume_handle, |
| volume_value, GATT_WRITE_NO_RSP, |
| nullptr, nullptr); |
| } |
| } |
| |
| void CleanUp() { |
| BTA_GATTC_AppDeregister(gatt_if); |
| for (HearingDevice& device : hearingDevices.devices) { |
| DoDisconnectCleanUp(&device); |
| } |
| |
| hearingDevices.devices.clear(); |
| |
| encoder_state_release(); |
| } |
| |
| private: |
| uint8_t gatt_if; |
| uint8_t seq_counter; |
| /* current volume gain for the hearing aids*/ |
| int8_t current_volume; |
| bluetooth::hearing_aid::HearingAidCallbacks* callbacks; |
| |
| /* currently used codec */ |
| uint8_t codec_in_use; |
| |
| uint16_t default_data_interval_ms; |
| |
| HearingDevices hearingDevices; |
| |
| void find_server_changed_ccc_handle(uint16_t conn_id, |
| const gatt::Service* service) { |
| HearingDevice* hearingDevice = hearingDevices.FindByConnId(conn_id); |
| if (!hearingDevice) { |
| DVLOG(2) << "Skipping unknown device, conn_id=" << loghex(conn_id); |
| return; |
| } |
| for (const gatt::Characteristic& charac : service->characteristics) { |
| if (charac.uuid == Uuid::From16Bit(GATT_UUID_GATT_SRV_CHGD)) { |
| hearingDevice->service_changed_ccc_handle = |
| find_ccc_handle(conn_id, charac.value_handle); |
| if (!hearingDevice->service_changed_ccc_handle) { |
| LOG(ERROR) << __func__ |
| << ": cannot find service changed CCC descriptor"; |
| continue; |
| } |
| LOG(INFO) << __func__ << " service_changed_ccc=" |
| << loghex(hearingDevice->service_changed_ccc_handle); |
| break; |
| } |
| } |
| } |
| |
| // Find the handle for the client characteristics configuration of a given |
| // characteristics |
| uint16_t find_ccc_handle(uint16_t conn_id, uint16_t char_handle) { |
| const gatt::Characteristic* p_char = |
| BTA_GATTC_GetCharacteristic(conn_id, char_handle); |
| |
| if (!p_char) { |
| LOG(WARNING) << __func__ << ": No such characteristic: " << char_handle; |
| return 0; |
| } |
| |
| for (const gatt::Descriptor& desc : p_char->descriptors) { |
| if (desc.uuid == Uuid::From16Bit(GATT_UUID_CHAR_CLIENT_CONFIG)) |
| return desc.handle; |
| } |
| |
| return 0; |
| } |
| |
| void send_state_change(HearingDevice* device, std::vector<uint8_t> payload) { |
| if (device->conn_id != 0) { |
| if (device->service_changed_rcvd) { |
| LOG(INFO) |
| << __func__ |
| << ": service discover is in progress, skip send State Change cmd."; |
| return; |
| } |
| // Send the data packet |
| LOG(INFO) << __func__ << ": Send State Change. device=" << device->address |
| << ", status=" << loghex(payload[1]); |
| BtaGattQueue::WriteCharacteristic( |
| device->conn_id, device->audio_control_point_handle, payload, |
| GATT_WRITE_NO_RSP, nullptr, nullptr); |
| } |
| } |
| |
| void send_state_change_to_other_side(HearingDevice* this_side_device, |
| std::vector<uint8_t> payload) { |
| for (auto& device : hearingDevices.devices) { |
| if ((device.address == this_side_device->address) || |
| (device.hi_sync_id != this_side_device->hi_sync_id)) { |
| continue; |
| } |
| send_state_change(&device, payload); |
| } |
| } |
| |
| void check_and_do_rssi_read(HearingDevice* device) { |
| if (device->read_rssi_count > 0) { |
| device->num_intervals_since_last_rssi_read++; |
| if (device->num_intervals_since_last_rssi_read >= PERIOD_TO_READ_RSSI_IN_INTERVALS) { |
| device->num_intervals_since_last_rssi_read = 0; |
| VLOG(1) << __func__ << ": device=" << device->address; |
| BTM_ReadRSSI(device->address, read_rssi_cb); |
| } |
| } |
| } |
| }; |
| |
| void read_rssi_cb(void* p_void) { |
| tBTM_RSSI_RESULT* p_result = (tBTM_RSSI_RESULT*)p_void; |
| |
| if (!p_result) return; |
| |
| if ((instance) && (p_result->status == BTM_SUCCESS)) { |
| instance->OnReadRssiComplete(p_result->rem_bda, p_result->rssi); |
| } |
| } |
| |
| void hearingaid_gattc_callback(tBTA_GATTC_EVT event, tBTA_GATTC* p_data) { |
| VLOG(2) << __func__ << " event = " << +event; |
| |
| if (p_data == nullptr) return; |
| |
| switch (event) { |
| case BTA_GATTC_DEREG_EVT: |
| break; |
| |
| case BTA_GATTC_OPEN_EVT: { |
| if (!instance) return; |
| tBTA_GATTC_OPEN& o = p_data->open; |
| instance->OnGattConnected(o.status, o.conn_id, o.client_if, o.remote_bda, |
| o.transport, o.mtu); |
| break; |
| } |
| |
| case BTA_GATTC_CLOSE_EVT: { |
| if (!instance) return; |
| tBTA_GATTC_CLOSE& c = p_data->close; |
| instance->OnGattDisconnected(c.status, c.conn_id, c.client_if, |
| c.remote_bda, c.reason); |
| } break; |
| |
| case BTA_GATTC_SEARCH_CMPL_EVT: |
| if (!instance) return; |
| instance->OnServiceSearchComplete(p_data->search_cmpl.conn_id, |
| p_data->search_cmpl.status); |
| break; |
| |
| case BTA_GATTC_NOTIF_EVT: |
| if (!instance) return; |
| if (!p_data->notify.is_notify || p_data->notify.len > GATT_MAX_ATTR_LEN) { |
| LOG(ERROR) << __func__ << ": rejected BTA_GATTC_NOTIF_EVT. is_notify=" |
| << p_data->notify.is_notify |
| << ", len=" << p_data->notify.len; |
| break; |
| } |
| instance->OnNotificationEvent(p_data->notify.conn_id, |
| p_data->notify.handle, p_data->notify.len, |
| p_data->notify.value); |
| break; |
| |
| case BTA_GATTC_ENC_CMPL_CB_EVT: |
| if (!instance) return; |
| instance->OnEncryptionComplete(p_data->enc_cmpl.remote_bda, true); |
| break; |
| |
| case BTA_GATTC_CONN_UPDATE_EVT: |
| if (!instance) return; |
| instance->OnConnectionUpdateComplete(p_data->conn_update.conn_id, p_data); |
| break; |
| |
| case BTA_GATTC_SRVC_CHG_EVT: |
| if (!instance) return; |
| instance->OnServiceChangeEvent(p_data->remote_bda); |
| break; |
| |
| case BTA_GATTC_SRVC_DISC_DONE_EVT: |
| if (!instance) return; |
| instance->OnServiceDiscDoneEvent(p_data->remote_bda); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| void encryption_callback(const RawAddress* address, tGATT_TRANSPORT, void*, |
| tBTM_STATUS status) { |
| if (instance) { |
| instance->OnEncryptionComplete(*address, |
| status == BTM_SUCCESS ? true : false); |
| } |
| } |
| |
| class HearingAidAudioReceiverImpl : public HearingAidAudioReceiver { |
| public: |
| void OnAudioDataReady(const std::vector<uint8_t>& data) override { |
| if (instance) instance->OnAudioDataReady(data); |
| } |
| void OnAudioSuspend(const std::function<void()>& stop_audio_ticks) override { |
| if (instance) instance->OnAudioSuspend(stop_audio_ticks); |
| } |
| void OnAudioResume(const std::function<void()>& start_audio_ticks) override { |
| if (instance) instance->OnAudioResume(start_audio_ticks); |
| } |
| }; |
| |
| HearingAidAudioReceiverImpl audioReceiverImpl; |
| |
| } // namespace |
| |
| void HearingAid::Initialize( |
| bluetooth::hearing_aid::HearingAidCallbacks* callbacks, Closure initCb) { |
| if (instance) { |
| LOG(ERROR) << "Already initialized!"; |
| } |
| |
| audioReceiver = &audioReceiverImpl; |
| instance = new HearingAidImpl(callbacks, initCb); |
| HearingAidAudioSource::Initialize(); |
| } |
| |
| bool HearingAid::IsHearingAidRunning() { return instance; } |
| |
| HearingAid* HearingAid::Get() { |
| CHECK(instance); |
| return instance; |
| }; |
| |
| void HearingAid::AddFromStorage(const HearingDevice& dev_info, |
| uint16_t is_white_listed) { |
| if (!instance) { |
| LOG(ERROR) << "Not initialized yet"; |
| } |
| |
| instance->AddFromStorage(dev_info, is_white_listed); |
| }; |
| |
| int HearingAid::GetDeviceCount() { |
| if (!instance) { |
| LOG(INFO) << __func__ << ": Not initialized yet"; |
| return 0; |
| } |
| |
| return (instance->GetDeviceCount()); |
| } |
| |
| void HearingAid::CleanUp() { |
| // Must stop audio source to make sure it doesn't call any of callbacks on our |
| // soon to be null instance |
| HearingAidAudioSource::Stop(); |
| |
| HearingAidImpl* ptr = instance; |
| instance = nullptr; |
| HearingAidAudioSource::CleanUp(); |
| |
| ptr->CleanUp(); |
| |
| delete ptr; |
| }; |
| |
| void HearingAid::DebugDump(int fd) { |
| dprintf(fd, "Hearing Aid Manager:\n"); |
| if (instance) instance->Dump(fd); |
| HearingAidAudioSource::DebugDump(fd); |
| dprintf(fd, "\n"); |
| } |