aosp aidl bluetooth audio hal implementation

Bug: 228804498
Test: atest VtsHalAudioCoreTargetTest
Change-Id: Id5fb60fe53ead9f5d2e6ecbb9988a23835cf2509
diff --git a/audio/aidl/default/bluetooth/DevicePortProxy.cpp b/audio/aidl/default/bluetooth/DevicePortProxy.cpp
new file mode 100644
index 0000000..aabf60f
--- /dev/null
+++ b/audio/aidl/default/bluetooth/DevicePortProxy.cpp
@@ -0,0 +1,562 @@
+/*
+ * Copyright 2023 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.
+ */
+
+#define LOG_TAG "AHAL_BluetoothPortProxy"
+
+#include <android-base/logging.h>
+#include <android-base/stringprintf.h>
+#include <audio_utils/primitives.h>
+#include <inttypes.h>
+#include <log/log.h>
+
+#include "core-impl/DevicePortProxy.h"
+
+namespace android::bluetooth::audio::aidl {
+
+namespace {
+
+// The maximum time to wait in std::condition_variable::wait_for()
+constexpr unsigned int kMaxWaitingTimeMs = 4500;
+
+}  // namespace
+
+using ::aidl::android::hardware::audio::common::SinkMetadata;
+using ::aidl::android::hardware::audio::common::SourceMetadata;
+using ::aidl::android::hardware::bluetooth::audio::AudioConfiguration;
+using ::aidl::android::hardware::bluetooth::audio::BluetoothAudioSessionControl;
+using ::aidl::android::hardware::bluetooth::audio::BluetoothAudioStatus;
+using ::aidl::android::hardware::bluetooth::audio::ChannelMode;
+using ::aidl::android::hardware::bluetooth::audio::PcmConfiguration;
+using ::aidl::android::hardware::bluetooth::audio::PortStatusCallbacks;
+using ::aidl::android::hardware::bluetooth::audio::PresentationPosition;
+using ::aidl::android::hardware::bluetooth::audio::SessionType;
+using ::aidl::android::media::audio::common::AudioDeviceDescription;
+using ::aidl::android::media::audio::common::AudioDeviceType;
+using ::android::base::StringPrintf;
+
+std::ostream& operator<<(std::ostream& os, const BluetoothStreamState& state) {
+    switch (state) {
+        case BluetoothStreamState::DISABLED:
+            return os << "DISABLED";
+        case BluetoothStreamState::STANDBY:
+            return os << "STANDBY";
+        case BluetoothStreamState::STARTING:
+            return os << "STARTING";
+        case BluetoothStreamState::STARTED:
+            return os << "STARTED";
+        case BluetoothStreamState::SUSPENDING:
+            return os << "SUSPENDING";
+        case BluetoothStreamState::UNKNOWN:
+            return os << "UNKNOWN";
+        default:
+            return os << android::base::StringPrintf("%#hhx", state);
+    }
+}
+
+BluetoothAudioPortAidl::BluetoothAudioPortAidl()
+    : mCookie(::aidl::android::hardware::bluetooth::audio::kObserversCookieUndefined),
+      mState(BluetoothStreamState::DISABLED),
+      mSessionType(SessionType::UNKNOWN) {}
+
+BluetoothAudioPortAidl::~BluetoothAudioPortAidl() {
+    unregisterPort();
+}
+
+bool BluetoothAudioPortAidl::registerPort(const AudioDeviceDescription& description) {
+    if (inUse()) {
+        LOG(ERROR) << __func__ << debugMessage() << " already in use";
+        return false;
+    }
+
+    if (!initSessionType(description)) return false;
+
+    auto control_result_cb = [port = this](uint16_t cookie, bool start_resp,
+                                           const BluetoothAudioStatus& status) {
+        (void)start_resp;
+        port->controlResultHandler(cookie, status);
+    };
+    auto session_changed_cb = [port = this](uint16_t cookie) {
+        port->sessionChangedHandler(cookie);
+    };
+    // TODO: Add audio_config_changed_cb
+    PortStatusCallbacks cbacks = {
+            .control_result_cb_ = control_result_cb,
+            .session_changed_cb_ = session_changed_cb,
+    };
+    mCookie = BluetoothAudioSessionControl::RegisterControlResultCback(mSessionType, cbacks);
+    auto isOk = (mCookie != ::aidl::android::hardware::bluetooth::audio::kObserversCookieUndefined);
+    if (isOk) {
+        std::lock_guard guard(mCvMutex);
+        mState = BluetoothStreamState::STANDBY;
+    }
+    LOG(DEBUG) << __func__ << debugMessage();
+    return isOk;
+}
+
+bool BluetoothAudioPortAidl::initSessionType(const AudioDeviceDescription& description) {
+    if (description.connection == AudioDeviceDescription::CONNECTION_BT_A2DP &&
+        (description.type == AudioDeviceType::OUT_DEVICE ||
+         description.type == AudioDeviceType::OUT_HEADPHONE ||
+         description.type == AudioDeviceType::OUT_SPEAKER)) {
+        LOG(VERBOSE) << __func__
+                     << ": device=AUDIO_DEVICE_OUT_BLUETOOTH_A2DP (HEADPHONES/SPEAKER) ("
+                     << description.toString() << ")";
+        mSessionType = SessionType::A2DP_SOFTWARE_ENCODING_DATAPATH;
+    } else if (description.connection == AudioDeviceDescription::CONNECTION_WIRELESS &&
+               description.type == AudioDeviceType::OUT_HEARING_AID) {
+        LOG(VERBOSE) << __func__ << ": device=AUDIO_DEVICE_OUT_HEARING_AID (MEDIA/VOICE) ("
+                     << description.toString() << ")";
+        mSessionType = SessionType::HEARING_AID_SOFTWARE_ENCODING_DATAPATH;
+    } else if (description.connection == AudioDeviceDescription::CONNECTION_BT_LE &&
+               description.type == AudioDeviceType::OUT_HEADSET) {
+        LOG(VERBOSE) << __func__ << ": device=AUDIO_DEVICE_OUT_BLE_HEADSET (MEDIA/VOICE) ("
+                     << description.toString() << ")";
+        mSessionType = SessionType::LE_AUDIO_SOFTWARE_ENCODING_DATAPATH;
+    } else if (description.connection == AudioDeviceDescription::CONNECTION_BT_LE &&
+               description.type == AudioDeviceType::OUT_SPEAKER) {
+        LOG(VERBOSE) << __func__ << ": device=AUDIO_DEVICE_OUT_BLE_SPEAKER (MEDIA) ("
+                     << description.toString() << ")";
+        mSessionType = SessionType::LE_AUDIO_SOFTWARE_ENCODING_DATAPATH;
+    } else if (description.connection == AudioDeviceDescription::CONNECTION_BT_LE &&
+               description.type == AudioDeviceType::IN_HEADSET) {
+        LOG(VERBOSE) << __func__ << ": device=AUDIO_DEVICE_IN_BLE_HEADSET (VOICE) ("
+                     << description.toString() << ")";
+        mSessionType = SessionType::LE_AUDIO_SOFTWARE_DECODING_DATAPATH;
+    } else if (description.connection == AudioDeviceDescription::CONNECTION_BT_LE &&
+               description.type == AudioDeviceType::OUT_BROADCAST) {
+        LOG(VERBOSE) << __func__ << ": device=AUDIO_DEVICE_OUT_BLE_BROADCAST (MEDIA) ("
+                     << description.toString() << ")";
+        mSessionType = SessionType::LE_AUDIO_BROADCAST_SOFTWARE_ENCODING_DATAPATH;
+    } else {
+        LOG(ERROR) << __func__ << ": unknown device=" << description.toString();
+        return false;
+    }
+
+    if (!BluetoothAudioSessionControl::IsSessionReady(mSessionType)) {
+        LOG(ERROR) << __func__ << ": device=" << description.toString()
+                   << ", session_type=" << toString(mSessionType) << " is not ready";
+        return false;
+    }
+    return true;
+}
+
+void BluetoothAudioPortAidl::unregisterPort() {
+    if (!inUse()) {
+        LOG(WARNING) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return;
+    }
+    BluetoothAudioSessionControl::UnregisterControlResultCback(mSessionType, mCookie);
+    mCookie = ::aidl::android::hardware::bluetooth::audio::kObserversCookieUndefined;
+    LOG(VERBOSE) << __func__ << debugMessage() << " port unregistered";
+}
+
+void BluetoothAudioPortAidl::controlResultHandler(uint16_t cookie,
+                                                  const BluetoothAudioStatus& status) {
+    std::lock_guard guard(mCvMutex);
+    if (!inUse()) {
+        LOG(ERROR) << "control_result_cb: BluetoothAudioPortAidl is not in use";
+        return;
+    }
+    if (mCookie != cookie) {
+        LOG(ERROR) << "control_result_cb: proxy of device port (cookie="
+                   << StringPrintf("%#hx", cookie) << ") is corrupted";
+        return;
+    }
+    BluetoothStreamState previous_state = mState;
+    LOG(INFO) << "control_result_cb:" << debugMessage() << ", previous_state=" << previous_state
+              << ", status=" << toString(status);
+
+    switch (previous_state) {
+        case BluetoothStreamState::STARTED:
+            /* Only Suspend signal can be send in STARTED state*/
+            if (status == BluetoothAudioStatus::RECONFIGURATION ||
+                status == BluetoothAudioStatus::SUCCESS) {
+                mState = BluetoothStreamState::STANDBY;
+            } else {
+                LOG(WARNING) << StringPrintf(
+                        "control_result_cb: status=%s failure for session_type= %s, cookie=%#hx, "
+                        "previous_state=%#hhx",
+                        toString(status).c_str(), toString(mSessionType).c_str(), mCookie,
+                        previous_state);
+            }
+            break;
+        case BluetoothStreamState::STARTING:
+            if (status == BluetoothAudioStatus::SUCCESS) {
+                mState = BluetoothStreamState::STARTED;
+            } else {
+                // Set to standby since the stack may be busy switching between outputs
+                LOG(WARNING) << StringPrintf(
+                        "control_result_cb: status=%s failure for session_type= %s, cookie=%#hx, "
+                        "previous_state=%#hhx",
+                        toString(status).c_str(), toString(mSessionType).c_str(), mCookie,
+                        previous_state);
+                mState = BluetoothStreamState::STANDBY;
+            }
+            break;
+        case BluetoothStreamState::SUSPENDING:
+            if (status == BluetoothAudioStatus::SUCCESS) {
+                mState = BluetoothStreamState::STANDBY;
+            } else {
+                // It will be failed if the headset is disconnecting, and set to disable
+                // to wait for re-init again
+                LOG(WARNING) << StringPrintf(
+                        "control_result_cb: status=%s failure for session_type= %s, cookie=%#hx, "
+                        "previous_state=%#hhx",
+                        toString(status).c_str(), toString(mSessionType).c_str(), mCookie,
+                        previous_state);
+                mState = BluetoothStreamState::DISABLED;
+            }
+            break;
+        default:
+            LOG(ERROR) << "control_result_cb: unexpected previous_state="
+                       << StringPrintf(
+                                  "control_result_cb: status=%s failure for session_type= %s, "
+                                  "cookie=%#hx, previous_state=%#hhx",
+                                  toString(status).c_str(), toString(mSessionType).c_str(), mCookie,
+                                  previous_state);
+            return;
+    }
+    mInternalCv.notify_all();
+}
+
+void BluetoothAudioPortAidl::sessionChangedHandler(uint16_t cookie) {
+    std::lock_guard guard(mCvMutex);
+    if (!inUse()) {
+        LOG(ERROR) << "session_changed_cb: BluetoothAudioPortAidl is not in use";
+        return;
+    }
+    if (mCookie != cookie) {
+        LOG(ERROR) << "session_changed_cb: proxy of device port (cookie="
+                   << StringPrintf("%#hx", cookie) << ") is corrupted";
+        return;
+    }
+    BluetoothStreamState previous_state = mState;
+    LOG(VERBOSE) << "session_changed_cb:" << debugMessage()
+                 << ", previous_state=" << previous_state;
+    mState = BluetoothStreamState::DISABLED;
+    mInternalCv.notify_all();
+}
+
+bool BluetoothAudioPortAidl::inUse() const {
+    return (mCookie != ::aidl::android::hardware::bluetooth::audio::kObserversCookieUndefined);
+}
+
+bool BluetoothAudioPortAidl::getPreferredDataIntervalUs(size_t* interval_us) const {
+    if (!interval_us) {
+        LOG(ERROR) << __func__ << ": bad input arg";
+        return false;
+    }
+
+    if (!inUse()) {
+        LOG(ERROR) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return false;
+    }
+
+    const AudioConfiguration& hal_audio_cfg =
+            BluetoothAudioSessionControl::GetAudioConfig(mSessionType);
+    if (hal_audio_cfg.getTag() != AudioConfiguration::pcmConfig) {
+        LOG(ERROR) << __func__ << ": unsupported audio cfg tag";
+        return false;
+    }
+
+    *interval_us = hal_audio_cfg.get<AudioConfiguration::pcmConfig>().dataIntervalUs;
+    return true;
+}
+
+bool BluetoothAudioPortAidl::loadAudioConfig(PcmConfiguration* audio_cfg) const {
+    if (!audio_cfg) {
+        LOG(ERROR) << __func__ << ": bad input arg";
+        return false;
+    }
+
+    if (!inUse()) {
+        LOG(ERROR) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return false;
+    }
+
+    const AudioConfiguration& hal_audio_cfg =
+            BluetoothAudioSessionControl::GetAudioConfig(mSessionType);
+    if (hal_audio_cfg.getTag() != AudioConfiguration::pcmConfig) {
+        LOG(ERROR) << __func__ << ": unsupported audio cfg tag";
+        return false;
+    }
+    *audio_cfg = hal_audio_cfg.get<AudioConfiguration::pcmConfig>();
+    LOG(VERBOSE) << __func__ << debugMessage() << ", state*=" << getState() << ", PcmConfig=["
+                 << audio_cfg->toString() << "]";
+    if (audio_cfg->channelMode == ChannelMode::UNKNOWN) {
+        return false;
+    }
+    return true;
+}
+
+bool BluetoothAudioPortAidl::condWaitState(BluetoothStreamState state) {
+    const auto waitTime = std::chrono::milliseconds(kMaxWaitingTimeMs);
+    std::unique_lock lock(mCvMutex);
+    base::ScopedLockAssertion lock_assertion(mCvMutex);
+    switch (state) {
+        case BluetoothStreamState::STARTING: {
+            LOG(VERBOSE) << __func__ << debugMessage() << " waiting for STARTED";
+            mInternalCv.wait_for(lock, waitTime, [this] {
+                base::ScopedLockAssertion lock_assertion(mCvMutex);
+                return mState != BluetoothStreamState::STARTING;
+            });
+            return mState == BluetoothStreamState::STARTED;
+        }
+        case BluetoothStreamState::SUSPENDING: {
+            LOG(VERBOSE) << __func__ << debugMessage() << " waiting for SUSPENDED";
+            mInternalCv.wait_for(lock, waitTime, [this] {
+                base::ScopedLockAssertion lock_assertion(mCvMutex);
+                return mState != BluetoothStreamState::SUSPENDING;
+            });
+            return mState == BluetoothStreamState::STANDBY;
+        }
+        default:
+            LOG(WARNING) << __func__ << debugMessage() << " waiting for KNOWN";
+            return false;
+    }
+    return false;
+}
+
+bool BluetoothAudioPortAidl::start() {
+    if (!inUse()) {
+        LOG(ERROR) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return false;
+    }
+    LOG(VERBOSE) << __func__ << debugMessage() << ", state=" << getState()
+                 << ", mono=" << (mIsStereoToMono ? "true" : "false") << " request";
+
+    {
+        std::unique_lock lock(mCvMutex);
+        base::ScopedLockAssertion lock_assertion(mCvMutex);
+        if (mState == BluetoothStreamState::STARTED) {
+            return true;  // nop, return
+        } else if (mState == BluetoothStreamState::SUSPENDING ||
+                   mState == BluetoothStreamState::STARTING) {
+            /* If port is in transient state, give some time to respond */
+            auto state_ = mState;
+            lock.unlock();
+            if (!condWaitState(state_)) {
+                LOG(ERROR) << __func__ << debugMessage() << ", state=" << getState() << " failure";
+                return false;
+            }
+        }
+    }
+
+    bool retval = false;
+    {
+        std::unique_lock lock(mCvMutex);
+        base::ScopedLockAssertion lock_assertion(mCvMutex);
+        if (mState == BluetoothStreamState::STARTED) {
+            retval = true;
+        } else if (mState == BluetoothStreamState::STANDBY) {
+            mState = BluetoothStreamState::STARTING;
+            lock.unlock();
+            if (BluetoothAudioSessionControl::StartStream(mSessionType)) {
+                retval = condWaitState(BluetoothStreamState::STARTING);
+            } else {
+                LOG(ERROR) << __func__ << debugMessage() << ", state=" << getState()
+                           << " Hal fails";
+            }
+        }
+    }
+
+    if (retval) {
+        LOG(INFO) << __func__ << debugMessage() << ", state=" << getState()
+                  << ", mono=" << (mIsStereoToMono ? "true" : "false") << " done";
+    } else {
+        LOG(ERROR) << __func__ << debugMessage() << ", state=" << getState() << " failure";
+    }
+
+    return retval;  // false if any failure like timeout
+}
+
+bool BluetoothAudioPortAidl::suspend() {
+    if (!inUse()) {
+        LOG(ERROR) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return false;
+    }
+    LOG(VERBOSE) << __func__ << debugMessage() << ", state=" << getState() << " request";
+
+    {
+        std::unique_lock lock(mCvMutex);
+        base::ScopedLockAssertion lock_assertion(mCvMutex);
+        if (mState == BluetoothStreamState::STANDBY) {
+            return true;  // nop, return
+        } else if (mState == BluetoothStreamState::SUSPENDING ||
+                   mState == BluetoothStreamState::STARTING) {
+            /* If port is in transient state, give some time to respond */
+            auto state_ = mState;
+            lock.unlock();
+            if (!condWaitState(state_)) {
+                LOG(ERROR) << __func__ << debugMessage() << ", state=" << getState() << " failure";
+                return false;
+            }
+        }
+    }
+
+    bool retval = false;
+    {
+        std::unique_lock lock(mCvMutex);
+        base::ScopedLockAssertion lock_assertion(mCvMutex);
+        if (mState == BluetoothStreamState::STANDBY) {
+            retval = true;
+        } else if (mState == BluetoothStreamState::STARTED) {
+            mState = BluetoothStreamState::SUSPENDING;
+            lock.unlock();
+            if (BluetoothAudioSessionControl::SuspendStream(mSessionType)) {
+                retval = condWaitState(BluetoothStreamState::SUSPENDING);
+            } else {
+                LOG(ERROR) << __func__ << debugMessage() << ", state=" << getState()
+                           << " Hal fails";
+            }
+        }
+    }
+
+    if (retval) {
+        LOG(INFO) << __func__ << debugMessage() << ", state=" << getState() << " done";
+    } else {
+        LOG(ERROR) << __func__ << debugMessage() << ", state=" << getState() << " failure";
+    }
+
+    return retval;  // false if any failure like timeout
+}
+
+void BluetoothAudioPortAidl::stop() {
+    if (!inUse()) {
+        LOG(ERROR) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return;
+    }
+    std::lock_guard guard(mCvMutex);
+    LOG(VERBOSE) << __func__ << debugMessage() << ", state=" << getState() << " request";
+    if (mState != BluetoothStreamState::DISABLED) {
+        BluetoothAudioSessionControl::StopStream(mSessionType);
+        mState = BluetoothStreamState::DISABLED;
+    }
+    LOG(VERBOSE) << __func__ << debugMessage() << ", state=" << getState() << " done";
+}
+
+size_t BluetoothAudioPortAidlOut::writeData(const void* buffer, size_t bytes) const {
+    if (!buffer) {
+        LOG(ERROR) << __func__ << ": bad input arg";
+        return 0;
+    }
+
+    if (!inUse()) {
+        LOG(ERROR) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return 0;
+    }
+
+    if (!mIsStereoToMono) {
+        return BluetoothAudioSessionControl::OutWritePcmData(mSessionType, buffer, bytes);
+    }
+
+    // WAR to mix the stereo into Mono (16 bits per sample)
+    const size_t write_frames = bytes >> 2;
+    if (write_frames == 0) return 0;
+    auto src = static_cast<const int16_t*>(buffer);
+    std::unique_ptr<int16_t[]> dst{new int16_t[write_frames]};
+    downmix_to_mono_i16_from_stereo_i16(dst.get(), src, write_frames);
+    // a frame is 16 bits, and the size of a mono frame is equal to half a stereo.
+    auto totalWrite = BluetoothAudioSessionControl::OutWritePcmData(mSessionType, dst.get(),
+                                                                    write_frames * 2);
+    return totalWrite * 2;
+}
+
+size_t BluetoothAudioPortAidlIn::readData(void* buffer, size_t bytes) const {
+    if (!buffer) {
+        LOG(ERROR) << __func__ << ": bad input arg";
+        return 0;
+    }
+
+    if (!inUse()) {
+        LOG(ERROR) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return 0;
+    }
+
+    return BluetoothAudioSessionControl::InReadPcmData(mSessionType, buffer, bytes);
+}
+
+bool BluetoothAudioPortAidl::getPresentationPosition(
+        PresentationPosition& presentation_position) const {
+    if (!inUse()) {
+        LOG(ERROR) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return false;
+    }
+    bool retval = BluetoothAudioSessionControl::GetPresentationPosition(mSessionType,
+                                                                        presentation_position);
+    LOG(VERBOSE) << __func__ << debugMessage() << ", state=" << getState()
+                 << presentation_position.toString();
+
+    return retval;
+}
+
+bool BluetoothAudioPortAidl::updateSourceMetadata(const SourceMetadata& source_metadata) const {
+    if (!inUse()) {
+        LOG(ERROR) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return false;
+    }
+    LOG(DEBUG) << __func__ << debugMessage() << ", state=" << getState() << ", "
+               << source_metadata.tracks.size() << " track(s)";
+    if (source_metadata.tracks.size() == 0) return true;
+    return BluetoothAudioSessionControl::UpdateSourceMetadata(mSessionType, source_metadata);
+}
+
+bool BluetoothAudioPortAidl::updateSinkMetadata(const SinkMetadata& sink_metadata) const {
+    if (!inUse()) {
+        LOG(ERROR) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return false;
+    }
+    LOG(DEBUG) << __func__ << debugMessage() << ", state=" << getState() << ", "
+               << sink_metadata.tracks.size() << " track(s)";
+    if (sink_metadata.tracks.size() == 0) return true;
+    return BluetoothAudioSessionControl::UpdateSinkMetadata(mSessionType, sink_metadata);
+}
+
+BluetoothStreamState BluetoothAudioPortAidl::getState() const {
+    return mState;
+}
+
+bool BluetoothAudioPortAidl::setState(BluetoothStreamState state) {
+    if (!inUse()) {
+        LOG(ERROR) << __func__ << ": BluetoothAudioPortAidl is not in use";
+        return false;
+    }
+    std::lock_guard guard(mCvMutex);
+    LOG(DEBUG) << __func__ << ": BluetoothAudioPortAidl old state = " << mState
+               << " new state = " << state;
+    mState = state;
+    return true;
+}
+
+bool BluetoothAudioPortAidl::isA2dp() const {
+    return mSessionType == SessionType::A2DP_SOFTWARE_ENCODING_DATAPATH ||
+           mSessionType == SessionType::A2DP_HARDWARE_OFFLOAD_ENCODING_DATAPATH;
+}
+
+bool BluetoothAudioPortAidl::isLeAudio() const {
+    return mSessionType == SessionType::LE_AUDIO_SOFTWARE_ENCODING_DATAPATH ||
+           mSessionType == SessionType::LE_AUDIO_SOFTWARE_DECODING_DATAPATH ||
+           mSessionType == SessionType::LE_AUDIO_HARDWARE_OFFLOAD_ENCODING_DATAPATH ||
+           mSessionType == SessionType::LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH ||
+           mSessionType == SessionType::LE_AUDIO_BROADCAST_SOFTWARE_ENCODING_DATAPATH ||
+           mSessionType == SessionType::LE_AUDIO_BROADCAST_HARDWARE_OFFLOAD_ENCODING_DATAPATH;
+}
+
+std::string BluetoothAudioPortAidl::debugMessage() const {
+    return StringPrintf(": session_type=%s, cookie=%#hx", toString(mSessionType).c_str(), mCookie);
+}
+
+}  // namespace android::bluetooth::audio::aidl