Merge "HAL: Add AIDL interface support" am: fdad1a3e69 am: f51d3d0def (32ce5f92) · Commits · e / os / android_packages_modules_Bluetooth

system/audio_hal_interface/Android.bp

+10 −0

Original line number	Diff line number	Diff line
		@@ -34,8 +34,16 @@ cc_library_static {
		android: {
		shared_libs: [
		"libfmq",
		"libbinder_ndk",
		"android.hardware.bluetooth.audio-V1-ndk",
		],
		srcs: [
		"aidl/a2dp_encoding.cc",
		"aidl/bluetooth_audio_port_impl.cc",
		"aidl/client_interface.cc",
		"aidl/codec_status.cc",
		"aidl/hearing_aid_software_encoding.cc",
		"aidl/le_audio_software.cc",
		"hidl/a2dp_encoding_hidl.cc",
		"hidl/client_interface_hidl.cc",
		"hidl/codec_status_hidl.cc",
		@@ -78,6 +86,8 @@ cc_test {
		"android.hardware.bluetooth.audio@2.0",
		"android.hardware.bluetooth.audio@2.1",
		"android.hardware.bluetooth.audio@2.2",
		"android.hardware.bluetooth.audio-V1-ndk",
		"libbinder_ndk",
		"libcutils",
		"libfmq",
		"libhidlbase",

system/audio_hal_interface/a2dp_encoding.cc

+16 −6

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@

		#include "a2dp_encoding.h"

		#include "aidl/a2dp_encoding.h"
		#include "hal_version_manager.h"
		#include "hidl/a2dp_encoding_hidl.h"

		@@ -30,7 +31,7 @@ bool update_codec_offloading_capabilities(
		return hidl::a2dp::update_codec_offloading_capabilities(
		framework_preference);
		}
		return false;
		return aidl::a2dp::update_codec_offloading_capabilities(framework_preference);
		}

		// Check if new bluetooth_audio is enabled
		@@ -39,7 +40,7 @@ bool is_hal_enabled() {
		BluetoothAudioHalTransport::HIDL) {
		return hidl::a2dp::is_hal_2_0_enabled();
		}
		return false;
		return aidl::a2dp::is_hal_enabled();
		}

		// Check if new bluetooth_audio is running with offloading encoders
		@@ -48,7 +49,7 @@ bool is_hal_offloading() {
		BluetoothAudioHalTransport::HIDL) {
		return hidl::a2dp::is_hal_2_0_offloading();
		}
		return false;
		return aidl::a2dp::is_hal_offloading();
		}

		// Initialize BluetoothAudio HAL: openProvider
		@@ -57,7 +58,7 @@ bool init(bluetooth::common::MessageLoopThread* message_loop) {
		BluetoothAudioHalTransport::HIDL) {
		return hidl::a2dp::init(message_loop);
		}
		return false;
		return aidl::a2dp::init(message_loop);
		}

		// Clean up BluetoothAudio HAL
		@@ -67,6 +68,7 @@ void cleanup() {
		hidl::a2dp::cleanup();
		return;
		}
		aidl::a2dp::cleanup();
		}

		// Set up the codec into BluetoothAudio HAL
		@@ -75,7 +77,7 @@ bool setup_codec() {
		BluetoothAudioHalTransport::HIDL) {
		return hidl::a2dp::setup_codec();
		}
		return false;
		return aidl::a2dp::setup_codec();
		}

		// Send command to the BluetoothAudio HAL: StartSession, EndSession,
		@@ -86,8 +88,13 @@ void start_session() {
		hidl::a2dp::start_session();
		return;
		}
		aidl::a2dp::start_session();
		}
		void end_session() {
		if (HalVersionManager::GetHalTransport() ==
		BluetoothAudioHalTransport::AIDL) {
		return aidl::a2dp::end_session();
		}
		if (HalVersionManager::GetHalTransport() ==
		BluetoothAudioHalTransport::HIDL) {
		hidl::a2dp::end_session();
		@@ -100,6 +107,7 @@ void ack_stream_started(const tA2DP_CTRL_ACK& status) {
		hidl::a2dp::ack_stream_started(status);
		return;
		}
		return aidl::a2dp::ack_stream_started(status);
		}
		void ack_stream_suspended(const tA2DP_CTRL_ACK& status) {
		if (HalVersionManager::GetHalTransport() ==
		@@ -107,6 +115,7 @@ void ack_stream_suspended(const tA2DP_CTRL_ACK& status) {
		hidl::a2dp::ack_stream_suspended(status);
		return;
		}
		aidl::a2dp::ack_stream_suspended(status);
		}

		// Read from the FMQ of BluetoothAudio HAL
		@@ -115,7 +124,7 @@ size_t read(uint8_t* p_buf, uint32_t len) {
		BluetoothAudioHalTransport::HIDL) {
		return hidl::a2dp::read(p_buf, len);
		}
		return 0;
		return aidl::a2dp::read(p_buf, len);
		}

		// Update A2DP delay report to BluetoothAudio HAL
		@@ -125,6 +134,7 @@ void set_remote_delay(uint16_t delay_report) {
		hidl::a2dp::set_remote_delay(delay_report);
		return;
		}
		aidl::a2dp::set_remote_delay(delay_report);
		}

		} // namespace a2dp

system/audio_hal_interface/aidl/a2dp_encoding.cc

0 → 100644

+558 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright 2022 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 "a2dp_encoding"

		#include "a2dp_encoding.h"

		#include "a2dp_transport.h"
		#include "audio_aidl_interfaces.h"
		#include "codec_status.h"
		#include "transport_instance.h"

		namespace bluetooth {
		namespace audio {
		namespace aidl {
		namespace a2dp {

		namespace {

		using ::aidl::android::hardware::bluetooth::audio::AudioConfiguration;
		using ::aidl::android::hardware::bluetooth::audio::ChannelMode;
		using ::aidl::android::hardware::bluetooth::audio::CodecConfiguration;
		using ::aidl::android::hardware::bluetooth::audio::PcmConfiguration;
		using ::aidl::android::hardware::bluetooth::audio::SessionType;

		using ::bluetooth::audio::aidl::BluetoothAudioCtrlAck;
		using ::bluetooth::audio::aidl::BluetoothAudioSinkClientInterface;
		using ::bluetooth::audio::aidl::codec::A2dpAacToHalConfig;
		using ::bluetooth::audio::aidl::codec::A2dpAptxToHalConfig;
		using ::bluetooth::audio::aidl::codec::A2dpCodecToHalBitsPerSample;
		using ::bluetooth::audio::aidl::codec::A2dpCodecToHalChannelMode;
		using ::bluetooth::audio::aidl::codec::A2dpCodecToHalSampleRate;
		using ::bluetooth::audio::aidl::codec::A2dpLdacToHalConfig;
		using ::bluetooth::audio::aidl::codec::A2dpSbcToHalConfig;

		/***
		*
		* A2dpTransport functions and variables
		*
		***/

		tA2DP_CTRL_CMD A2dpTransport::a2dp_pending_cmd_ = A2DP_CTRL_CMD_NONE;
		uint16_t A2dpTransport::remote_delay_report_ = 0;

		A2dpTransport::A2dpTransport(SessionType sessionType)
		: IBluetoothSinkTransportInstance(sessionType, (AudioConfiguration){}),
		total_bytes_read_(0),
		data_position_({}) {
		a2dp_pending_cmd_ = A2DP_CTRL_CMD_NONE;
		remote_delay_report_ = 0;
		}

		BluetoothAudioCtrlAck A2dpTransport::StartRequest() {
		// Check if a previous request is not finished
		if (a2dp_pending_cmd_ == A2DP_CTRL_CMD_START) {
		LOG(INFO) << __func__ << ": A2DP_CTRL_CMD_START in progress";
		return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_PENDING);
		} else if (a2dp_pending_cmd_ != A2DP_CTRL_CMD_NONE) {
		LOG(WARNING) << __func__ << ": busy in pending_cmd=" << a2dp_pending_cmd_;
		return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_FAILURE);
		}

		// Don't send START request to stack while we are in a call
		if (!bluetooth::headset::IsCallIdle()) {
		LOG(ERROR) << __func__ << ": call state is busy";
		return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_INCALL_FAILURE);
		}

		if (btif_av_stream_started_ready()) {
		// Already started, ACK back immediately.
		return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_SUCCESS);
		}
		if (btif_av_stream_ready()) {
		/*
		* Post start event and wait for audio path to open.
		* If we are the source, the ACK will be sent after the start
		* procedure is completed, othewise send it now.
		*/
		a2dp_pending_cmd_ = A2DP_CTRL_CMD_START;
		btif_av_stream_start();
		if (btif_av_get_peer_sep() != AVDT_TSEP_SRC) {
		LOG(INFO) << __func__ << ": accepted";
		return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_PENDING);
		}
		a2dp_pending_cmd_ = A2DP_CTRL_CMD_NONE;
		return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_SUCCESS);
		}
		LOG(ERROR) << __func__ << ": AV stream is not ready to start";
		return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_FAILURE);
		}

		BluetoothAudioCtrlAck A2dpTransport::SuspendRequest() {
		// Previous request is not finished
		if (a2dp_pending_cmd_ == A2DP_CTRL_CMD_SUSPEND) {
		LOG(INFO) << __func__ << ": A2DP_CTRL_CMD_SUSPEND in progress";
		return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_PENDING);
		} else if (a2dp_pending_cmd_ != A2DP_CTRL_CMD_NONE) {
		LOG(WARNING) << __func__ << ": busy in pending_cmd=" << a2dp_pending_cmd_;
		return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_FAILURE);
		}
		// Local suspend
		if (btif_av_stream_started_ready()) {
		LOG(INFO) << __func__ << ": accepted";
		a2dp_pending_cmd_ = A2DP_CTRL_CMD_SUSPEND;
		btif_av_stream_suspend();
		return BluetoothAudioCtrlAck::PENDING;
		}
		/* If we are not in started state, just ack back ok and let
		* audioflinger close the channel. This can happen if we are
		* remotely suspended, clear REMOTE SUSPEND flag.
		*/
		btif_av_clear_remote_suspend_flag();
		return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_SUCCESS);
		}

		void A2dpTransport::StopRequest() {
		if (btif_av_get_peer_sep() == AVDT_TSEP_SNK &&
		!btif_av_stream_started_ready()) {
		btif_av_clear_remote_suspend_flag();
		return;
		}
		LOG(INFO) << __func__ << ": handling";
		a2dp_pending_cmd_ = A2DP_CTRL_CMD_STOP;
		btif_av_stream_stop(RawAddress::kEmpty);
		}

		bool A2dpTransport::GetPresentationPosition(uint64_t* remote_delay_report_ns,
		uint64_t* total_bytes_read,
		timespec* data_position) {
		remote_delay_report_ns = remote_delay_report_ 100000u;
		*total_bytes_read = total_bytes_read_;
		*data_position = data_position_;
		VLOG(2) << __func__ << ": delay=" << remote_delay_report_
		<< "/10ms, data=" << total_bytes_read_
		<< " byte(s), timestamp=" << data_position_.tv_sec << "."
		<< data_position_.tv_nsec << "s";
		return true;
		}

		void A2dpTransport::SourceMetadataChanged(
		const source_metadata_t& source_metadata) {
		auto track_count = source_metadata.track_count;
		auto tracks = source_metadata.tracks;
		VLOG(1) << __func__ << ": " << track_count << " track(s) received";
		while (track_count) {
		VLOG(2) << __func__ << ": usage=" << tracks->usage
		<< ", content_type=" << tracks->content_type
		<< ", gain=" << tracks->gain;
		--track_count;
		++tracks;
		}
		}

		void A2dpTransport::SinkMetadataChanged(const sink_metadata_t&) {}

		tA2DP_CTRL_CMD A2dpTransport::GetPendingCmd() const {
		return a2dp_pending_cmd_;
		}

		void A2dpTransport::ResetPendingCmd() {
		a2dp_pending_cmd_ = A2DP_CTRL_CMD_NONE;
		}

		void A2dpTransport::ResetPresentationPosition() {
		remote_delay_report_ = 0;
		total_bytes_read_ = 0;
		data_position_ = {};
		}

		void A2dpTransport::LogBytesRead(size_t bytes_read) {
		if (bytes_read != 0) {
		total_bytes_read_ += bytes_read;
		clock_gettime(CLOCK_MONOTONIC, &data_position_);
		}
		}

		/***
		*
		* Global functions and variables
		*
		***/

		// delay reports from AVDTP is based on 1/10 ms (100us)
		void A2dpTransport::SetRemoteDelay(uint16_t delay_report) {
		remote_delay_report_ = delay_report;
		}

		// Common interface to call-out into Bluetooth Audio HAL
		BluetoothAudioSinkClientInterface* software_hal_interface = nullptr;
		BluetoothAudioSinkClientInterface* offloading_hal_interface = nullptr;
		BluetoothAudioSinkClientInterface* active_hal_interface = nullptr;

		// Save the value if the remote reports its delay before this interface is
		// initialized
		uint16_t remote_delay = 0;

		bool btaudio_a2dp_disabled = false;
		bool is_configured = false;

		BluetoothAudioCtrlAck a2dp_ack_to_bt_audio_ctrl_ack(tA2DP_CTRL_ACK ack) {
		switch (ack) {
		case A2DP_CTRL_ACK_SUCCESS:
		return BluetoothAudioCtrlAck::SUCCESS_FINISHED;
		case A2DP_CTRL_ACK_PENDING:
		return BluetoothAudioCtrlAck::PENDING;
		case A2DP_CTRL_ACK_INCALL_FAILURE:
		return BluetoothAudioCtrlAck::FAILURE_BUSY;
		case A2DP_CTRL_ACK_DISCONNECT_IN_PROGRESS:
		return BluetoothAudioCtrlAck::FAILURE_DISCONNECTING;
		case A2DP_CTRL_ACK_UNSUPPORTED: /* Offloading but resource failure */
		return BluetoothAudioCtrlAck::FAILURE_UNSUPPORTED;
		case A2DP_CTRL_ACK_FAILURE:
		return BluetoothAudioCtrlAck::FAILURE;
		default:
		return BluetoothAudioCtrlAck::FAILURE;
		}
		}

		bool a2dp_get_selected_hal_codec_config(CodecConfiguration* codec_config) {
		A2dpCodecConfig* a2dp_config = bta_av_get_a2dp_current_codec();
		if (a2dp_config == nullptr) {
		LOG(WARNING) << __func__ << ": failure to get A2DP codec config";
		return false;
		}
		btav_a2dp_codec_config_t current_codec = a2dp_config->getCodecConfig();
		switch (current_codec.codec_type) {
		case BTAV_A2DP_CODEC_INDEX_SOURCE_SBC:
		[[fallthrough]];
		case BTAV_A2DP_CODEC_INDEX_SINK_SBC: {
		if (!A2dpSbcToHalConfig(codec_config, a2dp_config)) {
		return false;
		}
		break;
		}
		case BTAV_A2DP_CODEC_INDEX_SOURCE_AAC:
		[[fallthrough]];
		case BTAV_A2DP_CODEC_INDEX_SINK_AAC: {
		if (!A2dpAacToHalConfig(codec_config, a2dp_config)) {
		return false;
		}
		break;
		}
		case BTAV_A2DP_CODEC_INDEX_SOURCE_APTX:
		[[fallthrough]];
		case BTAV_A2DP_CODEC_INDEX_SOURCE_APTX_HD: {
		if (!A2dpAptxToHalConfig(codec_config, a2dp_config)) {
		return false;
		}
		break;
		}
		case BTAV_A2DP_CODEC_INDEX_SOURCE_LDAC: {
		if (!A2dpLdacToHalConfig(codec_config, a2dp_config)) {
		return false;
		}
		break;
		}
		case BTAV_A2DP_CODEC_INDEX_MAX:
		[[fallthrough]];
		default:
		LOG(ERROR) << __func__
		<< ": Unknown codec_type=" << current_codec.codec_type;
		return false;
		}
		codec_config->encodedAudioBitrate = a2dp_config->getTrackBitRate();
		// Obtain the MTU
		RawAddress peer_addr = btif_av_source_active_peer();
		tA2DP_ENCODER_INIT_PEER_PARAMS peer_param;
		bta_av_co_get_peer_params(peer_addr, &peer_param);
		int effectiveMtu = bta_av_co_get_encoder_effective_frame_size();
		if (effectiveMtu > 0 && effectiveMtu < peer_param.peer_mtu) {
		codec_config->peerMtu = effectiveMtu;
		} else {
		codec_config->peerMtu = peer_param.peer_mtu;
		}
		if (current_codec.codec_type == BTAV_A2DP_CODEC_INDEX_SOURCE_SBC &&
		codec_config->config.get<CodecConfiguration::CodecSpecific::sbcConfig>()
		.maxBitpool <= A2DP_SBC_BITPOOL_MIDDLE_QUALITY) {
		codec_config->peerMtu = MAX_2MBPS_AVDTP_MTU;
		} else if (codec_config->peerMtu > MAX_3MBPS_AVDTP_MTU) {
		codec_config->peerMtu = MAX_3MBPS_AVDTP_MTU;
		}
		LOG(INFO) << __func__ << ": CodecConfiguration=" << codec_config->toString();
		return true;
		}

		bool a2dp_get_selected_hal_pcm_config(PcmConfiguration* pcm_config) {
		if (pcm_config == nullptr) return false;
		A2dpCodecConfig* a2dp_codec_configs = bta_av_get_a2dp_current_codec();
		if (a2dp_codec_configs == nullptr) {
		LOG(WARNING) << __func__ << ": failure to get A2DP codec config";
		*pcm_config = BluetoothAudioSinkClientInterface::kInvalidPcmConfiguration;
		return false;
		}

		btav_a2dp_codec_config_t current_codec = a2dp_codec_configs->getCodecConfig();
		pcm_config->sampleRateHz = A2dpCodecToHalSampleRate(current_codec);
		pcm_config->bitsPerSample = A2dpCodecToHalBitsPerSample(current_codec);
		pcm_config->channelMode = A2dpCodecToHalChannelMode(current_codec);
		return (pcm_config->sampleRateHz > 0 && pcm_config->bitsPerSample > 0 &&
		pcm_config->channelMode != ChannelMode::UNKNOWN);
		}

		// Checking if new bluetooth_audio is supported
		bool is_hal_force_disabled() {
		if (!is_configured) {
		btaudio_a2dp_disabled =
		osi_property_get_bool(BLUETOOTH_AUDIO_HAL_PROP_DISABLED, false);
		is_configured = true;
		}
		return btaudio_a2dp_disabled;
		}

		} // namespace

		bool update_codec_offloading_capabilities(
		const std::vector<btav_a2dp_codec_config_t>& framework_preference) {
		return ::bluetooth::audio::aidl::codec::UpdateOffloadingCapabilities(
		framework_preference);
		}

		// Checking if new bluetooth_audio is enabled
		bool is_hal_enabled() { return active_hal_interface != nullptr; }

		// Check if new bluetooth_audio is running with offloading encoders
		bool is_hal_offloading() {
		if (!is_hal_enabled()) {
		return false;
		}
		return active_hal_interface->GetTransportInstance()->GetSessionType() ==
		SessionType::A2DP_HARDWARE_OFFLOAD_ENCODING_DATAPATH;
		}

		// Initialize BluetoothAudio HAL: openProvider
		bool init(bluetooth::common::MessageLoopThread* message_loop) {
		LOG(INFO) << __func__;

		if (is_hal_force_disabled()) {
		LOG(ERROR) << __func__ << ": BluetoothAudio HAL is disabled";
		return false;
		}

		if (!BluetoothAudioClientInterface::is_aidl_available()) {
		LOG(ERROR) << __func__
		<< ": BluetoothAudio AIDL implementation does not exist";
		return false;
		}

		auto a2dp_sink =
		new A2dpTransport(SessionType::A2DP_SOFTWARE_ENCODING_DATAPATH);
		software_hal_interface =
		new BluetoothAudioSinkClientInterface(a2dp_sink, message_loop);
		if (!software_hal_interface->IsValid()) {
		LOG(WARNING) << __func__ << ": BluetoothAudio HAL for A2DP is invalid?!";
		delete software_hal_interface;
		software_hal_interface = nullptr;
		delete a2dp_sink;
		return false;
		}

		if (btif_av_is_a2dp_offload_enabled()) {
		a2dp_sink =
		new A2dpTransport(SessionType::A2DP_HARDWARE_OFFLOAD_ENCODING_DATAPATH);
		offloading_hal_interface =
		new BluetoothAudioSinkClientInterface(a2dp_sink, message_loop);
		if (!offloading_hal_interface->IsValid()) {
		LOG(FATAL) << __func__
		<< ": BluetoothAudio HAL for A2DP offloading is invalid?!";
		delete offloading_hal_interface;
		offloading_hal_interface = nullptr;
		delete a2dp_sink;
		a2dp_sink = static_cast<A2dpTransport*>(
		software_hal_interface->GetTransportInstance());
		delete software_hal_interface;
		software_hal_interface = nullptr;
		delete a2dp_sink;
		return false;
		}
		}

		active_hal_interface =
		(offloading_hal_interface != nullptr ? offloading_hal_interface
		: software_hal_interface);

		if (remote_delay != 0) {
		LOG(INFO) << __func__ << ": restore DELAY "
		<< static_cast<float>(remote_delay / 10.0) << " ms";
		static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance())
		->SetRemoteDelay(remote_delay);
		remote_delay = 0;
		}
		return true;
		}

		// Clean up BluetoothAudio HAL
		void cleanup() {
		if (!is_hal_enabled()) return;
		end_session();

		auto a2dp_sink = active_hal_interface->GetTransportInstance();
		static_cast<A2dpTransport*>(a2dp_sink)->ResetPendingCmd();
		static_cast<A2dpTransport*>(a2dp_sink)->ResetPresentationPosition();
		active_hal_interface = nullptr;

		a2dp_sink = software_hal_interface->GetTransportInstance();
		delete software_hal_interface;
		software_hal_interface = nullptr;
		delete a2dp_sink;
		if (offloading_hal_interface != nullptr) {
		a2dp_sink = offloading_hal_interface->GetTransportInstance();
		delete offloading_hal_interface;
		offloading_hal_interface = nullptr;
		delete a2dp_sink;
		}

		remote_delay = 0;
		}

		// Set up the codec into BluetoothAudio HAL
		bool setup_codec() {
		if (!is_hal_enabled()) {
		LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not enabled";
		return false;
		}
		CodecConfiguration codec_config{};
		if (!a2dp_get_selected_hal_codec_config(&codec_config)) {
		LOG(ERROR) << __func__ << ": Failed to get CodecConfiguration";
		return false;
		}
		bool should_codec_offloading =
		bluetooth::audio::aidl::codec::IsCodecOffloadingEnabled(codec_config);
		if (should_codec_offloading && !is_hal_offloading()) {
		LOG(WARNING) << __func__ << ": Switching BluetoothAudio HAL to Hardware";
		end_session();
		active_hal_interface = offloading_hal_interface;
		} else if (!should_codec_offloading && is_hal_offloading()) {
		LOG(WARNING) << __func__ << ": Switching BluetoothAudio HAL to Software";
		end_session();
		active_hal_interface = software_hal_interface;
		}

		AudioConfiguration audio_config{};
		if (active_hal_interface->GetTransportInstance()->GetSessionType() ==
		SessionType::A2DP_HARDWARE_OFFLOAD_ENCODING_DATAPATH) {
		audio_config.set<AudioConfiguration::a2dpConfig>(codec_config);
		} else {
		PcmConfiguration pcm_config{};
		if (!a2dp_get_selected_hal_pcm_config(&pcm_config)) {
		LOG(ERROR) << __func__ << ": Failed to get PcmConfiguration";
		return false;
		}
		audio_config.set<AudioConfiguration::pcmConfig>(pcm_config);
		}
		return active_hal_interface->UpdateAudioConfig(audio_config);
		}

		void start_session() {
		if (!is_hal_enabled()) {
		LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not enabled";
		return;
		}
		active_hal_interface->StartSession();
		}

		void end_session() {
		if (!is_hal_enabled()) {
		LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not enabled";
		return;
		}
		active_hal_interface->EndSession();
		static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance())
		->ResetPendingCmd();
		static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance())
		->ResetPresentationPosition();
		}

		void ack_stream_started(const tA2DP_CTRL_ACK& ack) {
		auto ctrl_ack = a2dp_ack_to_bt_audio_ctrl_ack(ack);
		LOG(INFO) << __func__ << ": result=" << ctrl_ack;
		auto a2dp_sink =
		static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance());
		auto pending_cmd = a2dp_sink->GetPendingCmd();
		if (pending_cmd == A2DP_CTRL_CMD_START) {
		active_hal_interface->StreamStarted(ctrl_ack);
		} else {
		LOG(WARNING) << __func__ << ": pending=" << pending_cmd
		<< " ignore result=" << ctrl_ack;
		return;
		}
		if (ctrl_ack != BluetoothAudioCtrlAck::PENDING) {
		a2dp_sink->ResetPendingCmd();
		}
		}

		void ack_stream_suspended(const tA2DP_CTRL_ACK& ack) {
		auto ctrl_ack = a2dp_ack_to_bt_audio_ctrl_ack(ack);
		LOG(INFO) << __func__ << ": result=" << ctrl_ack;
		auto a2dp_sink =
		static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance());
		auto pending_cmd = a2dp_sink->GetPendingCmd();
		if (pending_cmd == A2DP_CTRL_CMD_SUSPEND) {
		active_hal_interface->StreamSuspended(ctrl_ack);
		} else if (pending_cmd == A2DP_CTRL_CMD_STOP) {
		LOG(INFO) << __func__ << ": A2DP_CTRL_CMD_STOP result=" << ctrl_ack;
		} else {
		LOG(WARNING) << __func__ << ": pending=" << pending_cmd
		<< " ignore result=" << ctrl_ack;
		return;
		}
		if (ctrl_ack != BluetoothAudioCtrlAck::PENDING) {
		a2dp_sink->ResetPendingCmd();
		}
		}

		// Read from the FMQ of BluetoothAudio HAL
		size_t read(uint8_t* p_buf, uint32_t len) {
		if (!is_hal_enabled()) {
		LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not enabled";
		return 0;
		} else if (is_hal_offloading()) {
		LOG(ERROR) << __func__ << ": session_type="
		<< toString(active_hal_interface->GetTransportInstance()
		->GetSessionType())
		<< " is not A2DP_SOFTWARE_ENCODING_DATAPATH";
		return 0;
		}
		return active_hal_interface->ReadAudioData(p_buf, len);
		}

		// Update A2DP delay report to BluetoothAudio HAL
		void set_remote_delay(uint16_t delay_report) {
		if (!is_hal_enabled()) {
		LOG(INFO) << __func__ << ": not ready for DelayReport "
		<< static_cast<float>(delay_report / 10.0) << " ms";
		remote_delay = delay_report;
		return;
		}
		VLOG(1) << __func__ << ": DELAY " << static_cast<float>(delay_report / 10.0)
		<< " ms";
		static_cast<A2dpTransport*>(active_hal_interface->GetTransportInstance())
		->SetRemoteDelay(delay_report);
		}

		} // namespace a2dp
		} // namespace aidl
		} // namespace audio
		} // namespace bluetooth
		No newline at end of file

system/audio_hal_interface/aidl/a2dp_encoding.h

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system/audio_hal_interface/aidl/a2dp_transport.h

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