978ccd40f9
On platform release T, the legacy `audio.a2dp.default` HAL no longer exists, and cannot be trivially restored for generic system-side A2DP audio support. Rather than trying to cling on to its existence (which does not even work anymore even if one did so), it is time to come up with a new solution. This commit introduces a system-side implementation of the generic bluetooth audio HAL. The HAL itself is modelled after the default bluetooth audio HAL, while substantial components of the default audio HAL are also included as it has to also implement the audio HAL interfaces. The audio HAL implementation is delegated to `audio.sysbta.default`, forked from `audio.bluetooth.default` from the Bluetooth apex package. It then communicates with the bluetooth audio HAL interfaces, which need to live in the same process (in this case, the process of the sysbta HAL). This is why we cannot just load `audio.sysbta.default` into the default audio HAL or the audioserver process directly, but rather have to include our own simplistic audio HAL implementation. For now, the audio HAL implementation only includes one for the 6.0 version, but technically, an interface for *every* audio HAL version needs to exist. This, along with other messiness in the sysbta implementation, will be addressed in a future commit. Note that to actually make use of the sysbta audio hal, patches in frameworks/av and packages/modules/Bluetooth are required to introduce support for the property `persist.bluetooth.system_audio_hal.enabled`.
619 lines
21 KiB
C++
619 lines
21 KiB
C++
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <sys/types.h>
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#define LOG_TAG "BTAudioSessionAidl"
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#include <android-base/logging.h>
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#include <android-base/stringprintf.h>
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#include <android/binder_manager.h>
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#include "BluetoothAudioSession.h"
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namespace aidl {
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namespace android {
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namespace hardware {
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namespace bluetooth {
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namespace audio {
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static constexpr int kFmqSendTimeoutMs = 1000; // 1000 ms timeout for sending
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static constexpr int kFmqReceiveTimeoutMs =
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1000; // 1000 ms timeout for receiving
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static constexpr int kWritePollMs = 1; // polled non-blocking interval
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static constexpr int kReadPollMs = 1; // polled non-blocking interval
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BluetoothAudioSession::BluetoothAudioSession(const SessionType& session_type)
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: session_type_(session_type), stack_iface_(nullptr), data_mq_(nullptr) {}
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/***
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*
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* Callback methods
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*
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***/
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void BluetoothAudioSession::OnSessionStarted(
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const std::shared_ptr<IBluetoothAudioPort> stack_iface,
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const DataMQDesc* mq_desc, const AudioConfiguration& audio_config,
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const std::vector<LatencyMode>& latency_modes) {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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if (stack_iface == nullptr) {
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LOG(ERROR) << __func__ << " - SessionType=" << toString(session_type_)
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<< ", IBluetoothAudioPort Invalid";
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} else if (!UpdateAudioConfig(audio_config)) {
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LOG(ERROR) << __func__ << " - SessionType=" << toString(session_type_)
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<< ", AudioConfiguration=" << audio_config.toString()
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<< " Invalid";
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} else if (!UpdateDataPath(mq_desc)) {
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LOG(ERROR) << __func__ << " - SessionType=" << toString(session_type_)
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<< " MqDescriptor Invalid";
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audio_config_ = nullptr;
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} else {
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stack_iface_ = stack_iface;
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latency_modes_ = latency_modes;
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LOG(INFO) << __func__ << " - SessionType=" << toString(session_type_)
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<< ", AudioConfiguration=" << audio_config.toString();
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ReportSessionStatus();
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}
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}
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void BluetoothAudioSession::OnSessionEnded() {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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bool toggled = IsSessionReady();
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LOG(INFO) << __func__ << " - SessionType=" << toString(session_type_);
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audio_config_ = nullptr;
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stack_iface_ = nullptr;
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UpdateDataPath(nullptr);
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if (toggled) {
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ReportSessionStatus();
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}
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}
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/***
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*
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* Util methods
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*
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***/
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const AudioConfiguration BluetoothAudioSession::GetAudioConfig() {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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if (!IsSessionReady()) {
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switch (session_type_) {
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case SessionType::A2DP_HARDWARE_OFFLOAD_ENCODING_DATAPATH:
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case SessionType::A2DP_HARDWARE_OFFLOAD_DECODING_DATAPATH:
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return AudioConfiguration(CodecConfiguration{});
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case SessionType::LE_AUDIO_HARDWARE_OFFLOAD_ENCODING_DATAPATH:
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case SessionType::LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH:
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return AudioConfiguration(LeAudioConfiguration{});
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case SessionType::LE_AUDIO_BROADCAST_HARDWARE_OFFLOAD_ENCODING_DATAPATH:
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return AudioConfiguration(LeAudioBroadcastConfiguration{});
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default:
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return AudioConfiguration(PcmConfiguration{});
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}
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}
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return *audio_config_;
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}
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void BluetoothAudioSession::ReportAudioConfigChanged(
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const AudioConfiguration& audio_config) {
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if (session_type_ !=
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SessionType::LE_AUDIO_HARDWARE_OFFLOAD_ENCODING_DATAPATH &&
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session_type_ !=
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SessionType::LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH) {
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return;
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}
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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audio_config_ = std::make_unique<AudioConfiguration>(audio_config);
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if (observers_.empty()) {
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LOG(WARNING) << __func__ << " - SessionType=" << toString(session_type_)
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<< " has NO port state observer";
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return;
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}
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for (auto& observer : observers_) {
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uint16_t cookie = observer.first;
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std::shared_ptr<struct PortStatusCallbacks> cb = observer.second;
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LOG(INFO) << __func__ << " for SessionType=" << toString(session_type_)
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<< ", bluetooth_audio=0x"
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<< ::android::base::StringPrintf("%04x", cookie);
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if (cb->audio_configuration_changed_cb_ != nullptr) {
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cb->audio_configuration_changed_cb_(cookie);
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}
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}
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}
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bool BluetoothAudioSession::IsSessionReady() {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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bool is_mq_valid =
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(session_type_ == SessionType::A2DP_HARDWARE_OFFLOAD_ENCODING_DATAPATH ||
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session_type_ ==
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SessionType::LE_AUDIO_HARDWARE_OFFLOAD_ENCODING_DATAPATH ||
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session_type_ ==
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SessionType::LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH ||
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session_type_ ==
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SessionType::LE_AUDIO_BROADCAST_HARDWARE_OFFLOAD_ENCODING_DATAPATH ||
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session_type_ == SessionType::A2DP_HARDWARE_OFFLOAD_DECODING_DATAPATH ||
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(data_mq_ != nullptr && data_mq_->isValid()));
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return stack_iface_ != nullptr && is_mq_valid && audio_config_ != nullptr;
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}
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/***
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*
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* Status callback methods
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*
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***/
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uint16_t BluetoothAudioSession::RegisterStatusCback(
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const PortStatusCallbacks& callbacks) {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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uint16_t cookie = ObserversCookieGetInitValue(session_type_);
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uint16_t cookie_upper_bound = ObserversCookieGetUpperBound(session_type_);
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while (cookie < cookie_upper_bound) {
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if (observers_.find(cookie) == observers_.end()) {
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break;
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}
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++cookie;
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}
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if (cookie >= cookie_upper_bound) {
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LOG(ERROR) << __func__ << " - SessionType=" << toString(session_type_)
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<< " has " << observers_.size()
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<< " observers already (No Resource)";
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return kObserversCookieUndefined;
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}
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std::shared_ptr<PortStatusCallbacks> cb =
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std::make_shared<PortStatusCallbacks>();
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*cb = callbacks;
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observers_[cookie] = cb;
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return cookie;
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}
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void BluetoothAudioSession::UnregisterStatusCback(uint16_t cookie) {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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if (observers_.erase(cookie) != 1) {
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LOG(WARNING) << __func__ << " - SessionType=" << toString(session_type_)
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<< " no such provider=0x"
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<< ::android::base::StringPrintf("%04x", cookie);
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}
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}
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/***
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*
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* Stream methods
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*
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***/
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bool BluetoothAudioSession::StartStream(bool is_low_latency) {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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if (!IsSessionReady()) {
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LOG(DEBUG) << __func__ << " - SessionType=" << toString(session_type_)
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<< " has NO session";
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return false;
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}
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auto hal_retval = stack_iface_->startStream(is_low_latency);
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if (!hal_retval.isOk()) {
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LOG(WARNING) << __func__ << " - IBluetoothAudioPort SessionType="
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<< toString(session_type_) << " failed";
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return false;
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}
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return true;
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}
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bool BluetoothAudioSession::SuspendStream() {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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if (!IsSessionReady()) {
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LOG(DEBUG) << __func__ << " - SessionType=" << toString(session_type_)
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<< " has NO session";
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return false;
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}
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auto hal_retval = stack_iface_->suspendStream();
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if (!hal_retval.isOk()) {
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LOG(WARNING) << __func__ << " - IBluetoothAudioPort SessionType="
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<< toString(session_type_) << " failed";
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return false;
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}
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return true;
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}
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void BluetoothAudioSession::StopStream() {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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if (!IsSessionReady()) {
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return;
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}
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auto hal_retval = stack_iface_->stopStream();
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if (!hal_retval.isOk()) {
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LOG(WARNING) << __func__ << " - IBluetoothAudioPort SessionType="
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<< toString(session_type_) << " failed";
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}
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}
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/***
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*
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* Private methods
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*
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***/
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bool BluetoothAudioSession::UpdateDataPath(const DataMQDesc* mq_desc) {
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if (mq_desc == nullptr) {
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// usecase of reset by nullptr
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data_mq_ = nullptr;
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return true;
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}
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std::unique_ptr<DataMQ> temp_mq;
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temp_mq.reset(new DataMQ(*mq_desc));
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if (!temp_mq || !temp_mq->isValid()) {
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data_mq_ = nullptr;
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return false;
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}
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data_mq_ = std::move(temp_mq);
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return true;
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}
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bool BluetoothAudioSession::UpdateAudioConfig(
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const AudioConfiguration& audio_config) {
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bool is_software_session =
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(session_type_ == SessionType::A2DP_SOFTWARE_ENCODING_DATAPATH ||
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session_type_ == SessionType::HEARING_AID_SOFTWARE_ENCODING_DATAPATH ||
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session_type_ == SessionType::LE_AUDIO_SOFTWARE_DECODING_DATAPATH ||
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session_type_ == SessionType::LE_AUDIO_SOFTWARE_ENCODING_DATAPATH ||
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session_type_ ==
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SessionType::LE_AUDIO_BROADCAST_SOFTWARE_ENCODING_DATAPATH ||
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session_type_ == SessionType::A2DP_SOFTWARE_DECODING_DATAPATH);
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bool is_offload_a2dp_session =
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(session_type_ == SessionType::A2DP_HARDWARE_OFFLOAD_ENCODING_DATAPATH ||
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session_type_ == SessionType::A2DP_HARDWARE_OFFLOAD_DECODING_DATAPATH);
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bool is_offload_le_audio_session =
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(session_type_ ==
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SessionType::LE_AUDIO_HARDWARE_OFFLOAD_ENCODING_DATAPATH ||
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session_type_ ==
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SessionType::LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH);
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auto audio_config_tag = audio_config.getTag();
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bool is_software_audio_config =
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(is_software_session &&
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audio_config_tag == AudioConfiguration::pcmConfig);
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bool is_a2dp_offload_audio_config =
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(is_offload_a2dp_session &&
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audio_config_tag == AudioConfiguration::a2dpConfig);
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bool is_le_audio_offload_audio_config =
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(is_offload_le_audio_session &&
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audio_config_tag == AudioConfiguration::leAudioConfig);
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if (!is_software_audio_config && !is_a2dp_offload_audio_config &&
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!is_le_audio_offload_audio_config) {
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return false;
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}
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audio_config_ = std::make_unique<AudioConfiguration>(audio_config);
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return true;
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}
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void BluetoothAudioSession::ReportSessionStatus() {
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// This is locked already by OnSessionStarted / OnSessionEnded
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if (observers_.empty()) {
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LOG(INFO) << __func__ << " - SessionType=" << toString(session_type_)
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<< " has NO port state observer";
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return;
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}
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for (auto& observer : observers_) {
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uint16_t cookie = observer.first;
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std::shared_ptr<PortStatusCallbacks> callback = observer.second;
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LOG(INFO) << __func__ << " - SessionType=" << toString(session_type_)
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<< " notify to bluetooth_audio=0x"
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<< ::android::base::StringPrintf("%04x", cookie);
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callback->session_changed_cb_(cookie);
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}
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}
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/***
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*
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* PCM methods
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*
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***/
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size_t BluetoothAudioSession::OutWritePcmData(const void* buffer,
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size_t bytes) {
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if (buffer == nullptr || bytes <= 0) {
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return 0;
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}
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size_t total_written = 0;
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int timeout_ms = kFmqSendTimeoutMs;
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do {
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std::unique_lock<std::recursive_mutex> lock(mutex_);
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if (!IsSessionReady()) {
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break;
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}
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size_t num_bytes_to_write = data_mq_->availableToWrite();
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if (num_bytes_to_write) {
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if (num_bytes_to_write > (bytes - total_written)) {
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num_bytes_to_write = bytes - total_written;
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}
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if (!data_mq_->write(
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static_cast<const MQDataType*>(buffer) + total_written,
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num_bytes_to_write)) {
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LOG(ERROR) << "FMQ datapath writing " << total_written << "/" << bytes
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<< " failed";
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return total_written;
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}
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total_written += num_bytes_to_write;
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} else if (timeout_ms >= kWritePollMs) {
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lock.unlock();
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usleep(kWritePollMs * 1000);
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timeout_ms -= kWritePollMs;
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} else {
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LOG(DEBUG) << "Data " << total_written << "/" << bytes << " overflow "
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<< (kFmqSendTimeoutMs - timeout_ms) << " ms";
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return total_written;
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}
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} while (total_written < bytes);
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return total_written;
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}
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size_t BluetoothAudioSession::InReadPcmData(void* buffer, size_t bytes) {
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if (buffer == nullptr || bytes <= 0) {
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return 0;
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}
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size_t total_read = 0;
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int timeout_ms = kFmqReceiveTimeoutMs;
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do {
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std::unique_lock<std::recursive_mutex> lock(mutex_);
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if (!IsSessionReady()) {
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break;
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}
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size_t num_bytes_to_read = data_mq_->availableToRead();
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if (num_bytes_to_read) {
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if (num_bytes_to_read > (bytes - total_read)) {
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num_bytes_to_read = bytes - total_read;
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}
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if (!data_mq_->read(static_cast<MQDataType*>(buffer) + total_read,
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num_bytes_to_read)) {
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LOG(ERROR) << "FMQ datapath reading " << total_read << "/" << bytes
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<< " failed";
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return total_read;
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}
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total_read += num_bytes_to_read;
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} else if (timeout_ms >= kReadPollMs) {
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lock.unlock();
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usleep(kReadPollMs * 1000);
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timeout_ms -= kReadPollMs;
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continue;
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} else {
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LOG(DEBUG) << "Data " << total_read << "/" << bytes << " overflow "
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<< (kFmqReceiveTimeoutMs - timeout_ms) << " ms";
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return total_read;
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}
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} while (total_read < bytes);
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return total_read;
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}
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/***
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*
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* Other methods
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*
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***/
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void BluetoothAudioSession::ReportControlStatus(bool start_resp,
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BluetoothAudioStatus status) {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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if (observers_.empty()) {
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LOG(WARNING) << __func__ << " - SessionType=" << toString(session_type_)
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<< " has NO port state observer";
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return;
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}
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for (auto& observer : observers_) {
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uint16_t cookie = observer.first;
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std::shared_ptr<PortStatusCallbacks> callback = observer.second;
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LOG(INFO) << __func__ << " - status=" << toString(status)
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<< " for SessionType=" << toString(session_type_)
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<< ", bluetooth_audio=0x"
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<< ::android::base::StringPrintf("%04x", cookie)
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<< (start_resp ? " started" : " suspended");
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callback->control_result_cb_(cookie, start_resp, status);
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}
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}
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void BluetoothAudioSession::ReportLowLatencyModeAllowedChanged(bool allowed) {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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low_latency_allowed_ = allowed;
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if (observers_.empty()) {
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LOG(WARNING) << __func__ << " - SessionType=" << toString(session_type_)
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<< " has NO port state observer";
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return;
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}
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for (auto& observer : observers_) {
|
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uint16_t cookie = observer.first;
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std::shared_ptr<PortStatusCallbacks> callback = observer.second;
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LOG(INFO) << __func__
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<< " - allowed=" << (allowed ? " allowed" : " disallowed");
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if (callback->low_latency_mode_allowed_cb_ != nullptr) {
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callback->low_latency_mode_allowed_cb_(cookie, allowed);
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}
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}
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}
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|
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bool BluetoothAudioSession::GetPresentationPosition(
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PresentationPosition& presentation_position) {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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if (!IsSessionReady()) {
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LOG(DEBUG) << __func__ << " - SessionType=" << toString(session_type_)
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<< " has NO session";
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return false;
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}
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bool retval = false;
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if (!stack_iface_->getPresentationPosition(&presentation_position).isOk()) {
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LOG(WARNING) << __func__ << " - IBluetoothAudioPort SessionType="
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<< toString(session_type_) << " failed";
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return false;
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}
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return retval;
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}
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|
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void BluetoothAudioSession::UpdateSourceMetadata(
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const struct source_metadata& source_metadata) {
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std::lock_guard<std::recursive_mutex> guard(mutex_);
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if (!IsSessionReady()) {
|
|
LOG(DEBUG) << __func__ << " - SessionType=" << toString(session_type_)
|
|
<< " has NO session";
|
|
return;
|
|
}
|
|
|
|
ssize_t track_count = source_metadata.track_count;
|
|
LOG(INFO) << __func__ << " - SessionType=" << toString(session_type_) << ","
|
|
<< track_count << " track(s)";
|
|
if (session_type_ == SessionType::A2DP_SOFTWARE_ENCODING_DATAPATH ||
|
|
session_type_ == SessionType::A2DP_HARDWARE_OFFLOAD_ENCODING_DATAPATH ||
|
|
session_type_ == SessionType::A2DP_SOFTWARE_DECODING_DATAPATH ||
|
|
session_type_ == SessionType::A2DP_HARDWARE_OFFLOAD_DECODING_DATAPATH) {
|
|
return;
|
|
}
|
|
|
|
SourceMetadata hal_source_metadata;
|
|
hal_source_metadata.tracks.resize(track_count);
|
|
for (int i = 0; i < track_count; i++) {
|
|
hal_source_metadata.tracks[i].usage =
|
|
static_cast<media::audio::common::AudioUsage>(
|
|
source_metadata.tracks[i].usage);
|
|
hal_source_metadata.tracks[i].contentType =
|
|
static_cast<media::audio::common::AudioContentType>(
|
|
source_metadata.tracks[i].content_type);
|
|
hal_source_metadata.tracks[i].gain = source_metadata.tracks[i].gain;
|
|
LOG(VERBOSE) << __func__ << " - SessionType=" << toString(session_type_)
|
|
<< ", usage=" << toString(hal_source_metadata.tracks[i].usage)
|
|
<< ", content="
|
|
<< toString(hal_source_metadata.tracks[i].contentType)
|
|
<< ", gain=" << hal_source_metadata.tracks[i].gain;
|
|
}
|
|
|
|
auto hal_retval = stack_iface_->updateSourceMetadata(hal_source_metadata);
|
|
if (!hal_retval.isOk()) {
|
|
LOG(WARNING) << __func__ << " - IBluetoothAudioPort SessionType="
|
|
<< toString(session_type_) << " failed";
|
|
}
|
|
}
|
|
|
|
void BluetoothAudioSession::UpdateSinkMetadata(
|
|
const struct sink_metadata& sink_metadata) {
|
|
std::lock_guard<std::recursive_mutex> guard(mutex_);
|
|
if (!IsSessionReady()) {
|
|
LOG(DEBUG) << __func__ << " - SessionType=" << toString(session_type_)
|
|
<< " has NO session";
|
|
return;
|
|
}
|
|
|
|
ssize_t track_count = sink_metadata.track_count;
|
|
LOG(INFO) << __func__ << " - SessionType=" << toString(session_type_) << ","
|
|
<< track_count << " track(s)";
|
|
if (session_type_ == SessionType::A2DP_SOFTWARE_ENCODING_DATAPATH ||
|
|
session_type_ == SessionType::A2DP_HARDWARE_OFFLOAD_ENCODING_DATAPATH ||
|
|
session_type_ == SessionType::A2DP_SOFTWARE_DECODING_DATAPATH ||
|
|
session_type_ == SessionType::A2DP_HARDWARE_OFFLOAD_DECODING_DATAPATH) {
|
|
return;
|
|
}
|
|
|
|
SinkMetadata hal_sink_metadata;
|
|
hal_sink_metadata.tracks.resize(track_count);
|
|
for (int i = 0; i < track_count; i++) {
|
|
hal_sink_metadata.tracks[i].source =
|
|
static_cast<media::audio::common::AudioSource>(
|
|
sink_metadata.tracks[i].source);
|
|
hal_sink_metadata.tracks[i].gain = sink_metadata.tracks[i].gain;
|
|
LOG(INFO) << __func__ << " - SessionType=" << toString(session_type_)
|
|
<< ", source=" << sink_metadata.tracks[i].source
|
|
<< ", dest_device=" << sink_metadata.tracks[i].dest_device
|
|
<< ", gain=" << sink_metadata.tracks[i].gain
|
|
<< ", dest_device_address="
|
|
<< sink_metadata.tracks[i].dest_device_address;
|
|
}
|
|
|
|
auto hal_retval = stack_iface_->updateSinkMetadata(hal_sink_metadata);
|
|
if (!hal_retval.isOk()) {
|
|
LOG(WARNING) << __func__ << " - IBluetoothAudioPort SessionType="
|
|
<< toString(session_type_) << " failed";
|
|
}
|
|
}
|
|
|
|
std::vector<LatencyMode> BluetoothAudioSession::GetSupportedLatencyModes() {
|
|
std::lock_guard<std::recursive_mutex> guard(mutex_);
|
|
if (!IsSessionReady()) {
|
|
LOG(DEBUG) << __func__ << " - SessionType=" << toString(session_type_)
|
|
<< " has NO session";
|
|
return std::vector<LatencyMode>();
|
|
}
|
|
if (low_latency_allowed_) return latency_modes_;
|
|
std::vector<LatencyMode> modes;
|
|
for (LatencyMode mode : latency_modes_) {
|
|
if (mode == LatencyMode::LOW_LATENCY)
|
|
// ignore those low latency mode if Bluetooth stack doesn't allow
|
|
continue;
|
|
modes.push_back(mode);
|
|
}
|
|
return modes;
|
|
}
|
|
|
|
void BluetoothAudioSession::SetLatencyMode(const LatencyMode& latency_mode) {
|
|
std::lock_guard<std::recursive_mutex> guard(mutex_);
|
|
if (!IsSessionReady()) {
|
|
LOG(DEBUG) << __func__ << " - SessionType=" << toString(session_type_)
|
|
<< " has NO session";
|
|
return;
|
|
}
|
|
|
|
auto hal_retval = stack_iface_->setLatencyMode(latency_mode);
|
|
if (!hal_retval.isOk()) {
|
|
LOG(WARNING) << __func__ << " - IBluetoothAudioPort SessionType="
|
|
<< toString(session_type_) << " failed";
|
|
}
|
|
}
|
|
|
|
bool BluetoothAudioSession::IsAidlAvailable() {
|
|
if (is_aidl_checked) return is_aidl_available;
|
|
is_aidl_available =
|
|
(AServiceManager_checkService(
|
|
kDefaultAudioProviderFactoryInterface.c_str()) != nullptr);
|
|
is_aidl_checked = true;
|
|
return is_aidl_available;
|
|
}
|
|
|
|
/***
|
|
*
|
|
* BluetoothAudioSessionInstance
|
|
*
|
|
***/
|
|
std::mutex BluetoothAudioSessionInstance::mutex_;
|
|
std::unordered_map<SessionType, std::shared_ptr<BluetoothAudioSession>>
|
|
BluetoothAudioSessionInstance::sessions_map_;
|
|
|
|
std::shared_ptr<BluetoothAudioSession>
|
|
BluetoothAudioSessionInstance::GetSessionInstance(
|
|
const SessionType& session_type) {
|
|
std::lock_guard<std::mutex> guard(mutex_);
|
|
|
|
if (!sessions_map_.empty()) {
|
|
auto entry = sessions_map_.find(session_type);
|
|
if (entry != sessions_map_.end()) {
|
|
return entry->second;
|
|
}
|
|
}
|
|
std::shared_ptr<BluetoothAudioSession> session_ptr =
|
|
std::make_shared<BluetoothAudioSession>(session_type);
|
|
sessions_map_[session_type] = session_ptr;
|
|
return session_ptr;
|
|
}
|
|
|
|
} // namespace audio
|
|
} // namespace bluetooth
|
|
} // namespace hardware
|
|
} // namespace android
|
|
} // namespace aidl
|