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
diff --git a/audio/aidl/default/bluetooth/ModuleBluetooth.cpp b/audio/aidl/default/bluetooth/ModuleBluetooth.cpp
new file mode 100644
index 0000000..bb11f0a
--- /dev/null
+++ b/audio/aidl/default/bluetooth/ModuleBluetooth.cpp
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 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_ModuleBluetooth"
+
+#include <android-base/logging.h>
+
+#include "core-impl/ModuleBluetooth.h"
+#include "core-impl/StreamBluetooth.h"
+
+namespace aidl::android::hardware::audio::core {
+
+using aidl::android::hardware::audio::common::SinkMetadata;
+using aidl::android::hardware::audio::common::SourceMetadata;
+using aidl::android::media::audio::common::AudioOffloadInfo;
+using aidl::android::media::audio::common::MicrophoneInfo;
+
+ndk::ScopedAStatus ModuleBluetooth::getMicMute(bool* _aidl_return __unused) {
+ LOG(DEBUG) << __func__ << ": is not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+ndk::ScopedAStatus ModuleBluetooth::setMicMute(bool in_mute __unused) {
+ LOG(DEBUG) << __func__ << ": is not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+ndk::ScopedAStatus ModuleBluetooth::createInputStream(
+ StreamContext&& context, const SinkMetadata& sinkMetadata,
+ const std::vector<MicrophoneInfo>& microphones, std::shared_ptr<StreamIn>* result) {
+ return createStreamInstance<StreamInBluetooth>(result, std::move(context), sinkMetadata,
+ microphones);
+}
+
+ndk::ScopedAStatus ModuleBluetooth::createOutputStream(
+ StreamContext&& context, const SourceMetadata& sourceMetadata,
+ const std::optional<AudioOffloadInfo>& offloadInfo, std::shared_ptr<StreamOut>* result) {
+ return createStreamInstance<StreamOutBluetooth>(result, std::move(context), sourceMetadata,
+ offloadInfo);
+}
+
+ndk::ScopedAStatus ModuleBluetooth::onMasterMuteChanged(bool) {
+ LOG(DEBUG) << __func__ << ": is not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+ndk::ScopedAStatus ModuleBluetooth::onMasterVolumeChanged(float) {
+ LOG(DEBUG) << __func__ << ": is not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+} // namespace aidl::android::hardware::audio::core
diff --git a/audio/aidl/default/bluetooth/StreamBluetooth.cpp b/audio/aidl/default/bluetooth/StreamBluetooth.cpp
new file mode 100644
index 0000000..dfccb0e
--- /dev/null
+++ b/audio/aidl/default/bluetooth/StreamBluetooth.cpp
@@ -0,0 +1,298 @@
+/*
+ * Copyright (C) 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_StreamBluetooth"
+
+#include <Utils.h>
+#include <android-base/logging.h>
+#include <audio_utils/clock.h>
+
+#include "BluetoothAudioSessionControl.h"
+#include "core-impl/StreamBluetooth.h"
+
+namespace aidl::android::hardware::audio::core {
+
+using ::aidl::android::hardware::audio::common::SinkMetadata;
+using ::aidl::android::hardware::audio::common::SourceMetadata;
+using ::aidl::android::hardware::audio::core::VendorParameter;
+using ::aidl::android::hardware::bluetooth::audio::ChannelMode;
+using ::aidl::android::hardware::bluetooth::audio::PcmConfiguration;
+using ::aidl::android::hardware::bluetooth::audio::PresentationPosition;
+using ::aidl::android::media::audio::common::AudioChannelLayout;
+using ::aidl::android::media::audio::common::AudioDevice;
+using ::aidl::android::media::audio::common::AudioDeviceAddress;
+using ::aidl::android::media::audio::common::AudioFormatDescription;
+using ::aidl::android::media::audio::common::AudioFormatType;
+using ::aidl::android::media::audio::common::AudioOffloadInfo;
+using ::aidl::android::media::audio::common::MicrophoneDynamicInfo;
+using ::aidl::android::media::audio::common::MicrophoneInfo;
+using ::android::bluetooth::audio::aidl::BluetoothAudioPortAidl;
+using ::android::bluetooth::audio::aidl::BluetoothAudioPortAidlIn;
+using ::android::bluetooth::audio::aidl::BluetoothAudioPortAidlOut;
+using ::android::bluetooth::audio::aidl::BluetoothStreamState;
+
+constexpr int kBluetoothDefaultInputBufferMs = 20;
+constexpr int kBluetoothDefaultOutputBufferMs = 10;
+// constexpr int kBluetoothSpatializerOutputBufferMs = 10;
+
+size_t getFrameCount(uint64_t durationUs, uint32_t sampleRate) {
+ return (durationUs * sampleRate) / 1000000;
+}
+
+// pcm configuration params are not really used by the module
+StreamBluetooth::StreamBluetooth(StreamContext* context, const Metadata& metadata)
+ : StreamCommonImpl(context, metadata),
+ mSampleRate(getContext().getSampleRate()),
+ mChannelLayout(getContext().getChannelLayout()),
+ mFormat(getContext().getFormat()),
+ mFrameSizeBytes(getContext().getFrameSize()),
+ mIsInput(isInput(metadata)) {
+ mPreferredDataIntervalUs =
+ mIsInput ? kBluetoothDefaultInputBufferMs : kBluetoothDefaultOutputBufferMs;
+ mPreferredFrameCount = getFrameCount(mPreferredDataIntervalUs, mSampleRate);
+ mIsInitialized = false;
+ mIsReadyToClose = false;
+}
+
+::android::status_t StreamBluetooth::init() {
+ return ::android::OK; // defering this till we get AudioDeviceDescription
+}
+
+const StreamCommonInterface::ConnectedDevices& StreamBluetooth::getConnectedDevices() const {
+ std::lock_guard guard(mLock);
+ return StreamCommonImpl::getConnectedDevices();
+}
+
+ndk::ScopedAStatus StreamBluetooth::setConnectedDevices(
+ const std::vector<AudioDevice>& connectedDevices) {
+ if (mIsInput && connectedDevices.size() > 1) {
+ LOG(ERROR) << __func__ << ": wrong device size(" << connectedDevices.size()
+ << ") for input stream";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+ }
+ for (const auto& connectedDevice : connectedDevices) {
+ if (connectedDevice.address.getTag() != AudioDeviceAddress::mac) {
+ LOG(ERROR) << __func__ << ": bad device address" << connectedDevice.address.toString();
+ return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+ }
+ }
+ std::lock_guard guard(mLock);
+ RETURN_STATUS_IF_ERROR(StreamCommonImpl::setConnectedDevices(connectedDevices));
+ mIsInitialized = false; // updated connected device list, need initialization
+ return ndk::ScopedAStatus::ok();
+}
+
+::android::status_t StreamBluetooth::drain(StreamDescriptor::DrainMode) {
+ usleep(1000);
+ return ::android::OK;
+}
+
+::android::status_t StreamBluetooth::flush() {
+ usleep(1000);
+ return ::android::OK;
+}
+
+::android::status_t StreamBluetooth::pause() {
+ return standby();
+}
+
+::android::status_t StreamBluetooth::transfer(void* buffer, size_t frameCount,
+ size_t* actualFrameCount, int32_t* latencyMs) {
+ std::lock_guard guard(mLock);
+ if (!mIsInitialized || mIsReadyToClose) {
+ // 'setConnectedDevices' has been called or stream is ready to close, so no transfers
+ *actualFrameCount = 0;
+ *latencyMs = StreamDescriptor::LATENCY_UNKNOWN;
+ return ::android::OK;
+ }
+ *actualFrameCount = 0;
+ *latencyMs = 0;
+ for (auto proxy : mBtDeviceProxies) {
+ if (!proxy->start()) {
+ LOG(ERROR) << __func__ << ": state = " << proxy->getState() << " failed to start ";
+ return -EIO;
+ }
+ const size_t fc = std::min(frameCount, mPreferredFrameCount);
+ const size_t bytesToTransfer = fc * mFrameSizeBytes;
+ if (mIsInput) {
+ const size_t totalRead = proxy->readData(buffer, bytesToTransfer);
+ *actualFrameCount = std::max(*actualFrameCount, totalRead / mFrameSizeBytes);
+ } else {
+ const size_t totalWrite = proxy->writeData(buffer, bytesToTransfer);
+ *actualFrameCount = std::max(*actualFrameCount, totalWrite / mFrameSizeBytes);
+ }
+ PresentationPosition presentation_position;
+ if (!proxy->getPresentationPosition(presentation_position)) {
+ LOG(ERROR) << __func__ << ": getPresentationPosition returned error ";
+ return ::android::UNKNOWN_ERROR;
+ }
+ *latencyMs =
+ std::max(*latencyMs, (int32_t)(presentation_position.remoteDeviceAudioDelayNanos /
+ NANOS_PER_MILLISECOND));
+ }
+ return ::android::OK;
+}
+
+::android::status_t StreamBluetooth::initialize() {
+ if (!::aidl::android::hardware::bluetooth::audio::BluetoothAudioSession::IsAidlAvailable()) {
+ LOG(ERROR) << __func__ << ": IBluetoothAudioProviderFactory service not available";
+ return ::android::UNKNOWN_ERROR;
+ }
+ if (StreamCommonImpl::getConnectedDevices().empty()) {
+ LOG(ERROR) << __func__ << ", has no connected devices";
+ return ::android::NO_INIT;
+ }
+ // unregister older proxies (if any)
+ for (auto proxy : mBtDeviceProxies) {
+ proxy->stop();
+ proxy->unregisterPort();
+ }
+ mBtDeviceProxies.clear();
+ for (auto it = StreamCommonImpl::getConnectedDevices().begin();
+ it != StreamCommonImpl::getConnectedDevices().end(); ++it) {
+ std::shared_ptr<BluetoothAudioPortAidl> proxy =
+ mIsInput ? std::shared_ptr<BluetoothAudioPortAidl>(
+ std::make_shared<BluetoothAudioPortAidlIn>())
+ : std::shared_ptr<BluetoothAudioPortAidl>(
+ std::make_shared<BluetoothAudioPortAidlOut>());
+ if (proxy->registerPort(it->type)) {
+ LOG(ERROR) << __func__ << ": cannot init HAL";
+ return ::android::UNKNOWN_ERROR;
+ }
+ PcmConfiguration config;
+ if (!proxy->loadAudioConfig(&config)) {
+ LOG(ERROR) << __func__ << ": state=" << proxy->getState()
+ << " failed to get audio config";
+ return ::android::UNKNOWN_ERROR;
+ }
+ // TODO: Ensure minimum duration for spatialized output?
+ // WAR to support Mono / 16 bits per sample as the Bluetooth stack required
+ if (!mIsInput && config.channelMode == ChannelMode::MONO && config.bitsPerSample == 16) {
+ proxy->forcePcmStereoToMono(true);
+ config.channelMode = ChannelMode::STEREO;
+ LOG(INFO) << __func__ << ": force channels = to be AUDIO_CHANNEL_OUT_STEREO";
+ }
+ if (!checkConfigParams(config)) {
+ LOG(ERROR) << __func__ << " checkConfigParams failed";
+ return ::android::UNKNOWN_ERROR;
+ }
+ mBtDeviceProxies.push_back(std::move(proxy));
+ }
+ mIsInitialized = true;
+ return ::android::OK;
+}
+
+bool StreamBluetooth::checkConfigParams(
+ ::aidl::android::hardware::bluetooth::audio::PcmConfiguration& config) {
+ if ((int)mSampleRate != config.sampleRateHz) {
+ LOG(ERROR) << __func__ << ": Sample Rate mismatch, stream val = " << mSampleRate
+ << " hal val = " << config.sampleRateHz;
+ return false;
+ }
+ auto channelCount = aidl::android::hardware::audio::common::getChannelCount(mChannelLayout);
+ if ((config.channelMode == ChannelMode::MONO && channelCount != 1) ||
+ (config.channelMode == ChannelMode::STEREO && channelCount != 2)) {
+ LOG(ERROR) << __func__ << ": Channel count mismatch, stream val = " << channelCount
+ << " hal val = " << toString(config.channelMode);
+ return false;
+ }
+ if (mFormat.type != AudioFormatType::PCM) {
+ LOG(ERROR) << __func__ << ": unexpected format type "
+ << aidl::android::media::audio::common::toString(mFormat.type);
+ return false;
+ }
+ int8_t bps = aidl::android::hardware::audio::common::getPcmSampleSizeInBytes(mFormat.pcm) * 8;
+ if (bps != config.bitsPerSample) {
+ LOG(ERROR) << __func__ << ": bits per sample mismatch, stream val = " << bps
+ << " hal val = " << config.bitsPerSample;
+ return false;
+ }
+ if (config.dataIntervalUs > 0) {
+ mPreferredDataIntervalUs =
+ std::min((int32_t)mPreferredDataIntervalUs, config.dataIntervalUs);
+ mPreferredFrameCount = getFrameCount(mPreferredDataIntervalUs, mSampleRate);
+ }
+ return true;
+}
+
+ndk::ScopedAStatus StreamBluetooth::prepareToClose() {
+ std::lock_guard guard(mLock);
+ mIsReadyToClose = true;
+ return ndk::ScopedAStatus::ok();
+}
+
+::android::status_t StreamBluetooth::standby() {
+ std::lock_guard guard(mLock);
+ if (!mIsInitialized) {
+ if (auto status = initialize(); status != ::android::OK) return status;
+ }
+ for (auto proxy : mBtDeviceProxies) {
+ if (!proxy->suspend()) {
+ LOG(ERROR) << __func__ << ": state = " << proxy->getState() << " failed to stand by ";
+ return -EIO;
+ }
+ }
+ return ::android::OK;
+}
+
+::android::status_t StreamBluetooth::start() {
+ std::lock_guard guard(mLock);
+ if (!mIsInitialized) return initialize();
+ return ::android::OK;
+}
+
+void StreamBluetooth::shutdown() {
+ std::lock_guard guard(mLock);
+ for (auto proxy : mBtDeviceProxies) {
+ proxy->stop();
+ proxy->unregisterPort();
+ }
+ mBtDeviceProxies.clear();
+}
+
+ndk::ScopedAStatus StreamBluetooth::updateMetadataCommon(const Metadata& metadata) {
+ std::lock_guard guard(mLock);
+ if (!mIsInitialized) return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+ bool isOk = true;
+ if (isInput(metadata)) {
+ isOk = mBtDeviceProxies[0]->updateSinkMetadata(std::get<SinkMetadata>(metadata));
+ } else {
+ for (auto proxy : mBtDeviceProxies) {
+ if (!proxy->updateSourceMetadata(std::get<SourceMetadata>(metadata))) isOk = false;
+ }
+ }
+ return isOk ? ndk::ScopedAStatus::ok()
+ : ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+StreamInBluetooth::StreamInBluetooth(StreamContext&& context, const SinkMetadata& sinkMetadata,
+ const std::vector<MicrophoneInfo>& microphones)
+ : StreamIn(std::move(context), microphones),
+ StreamBluetooth(&(StreamIn::mContext), sinkMetadata) {}
+
+ndk::ScopedAStatus StreamInBluetooth::getActiveMicrophones(
+ std::vector<MicrophoneDynamicInfo>* _aidl_return __unused) {
+ LOG(DEBUG) << __func__ << ": not supported";
+ return ndk::ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+}
+
+StreamOutBluetooth::StreamOutBluetooth(StreamContext&& context,
+ const SourceMetadata& sourceMetadata,
+ const std::optional<AudioOffloadInfo>& offloadInfo)
+ : StreamOut(std::move(context), offloadInfo),
+ StreamBluetooth(&(StreamOut::mContext), sourceMetadata) {}
+
+} // namespace aidl::android::hardware::audio::core