Merge "Add stack side interface for Bluetooth audio HAL V2" (af906e96) · Commits · e / os / android_packages_modules_Bluetooth

Android.bp

+1 −0

Original line number	Diff line number	Diff line
		@@ -6,6 +6,7 @@ subdirs = [
		"common",
		"audio_a2dp_hw",
		"audio_bluetooth_hw",
		"audio_hal_interface",
		"audio_hearing_aid_hw",
		"hci",
		"utils",

system/audio_hal_interface/Android.bp

0 → 100644

+57 −0

Original line number	Diff line number	Diff line
		// Bluetooth Audio library for target
		// ========================================================
		cc_library_static {
		name: "libbt-audio-hal-interface",
		defaults: ["fluoride_defaults"],
		include_dirs: [
		"packages/modules/Bluetooth/system",
		"packages/modules/Bluetooth/system/bta/include",
		"packages/modules/Bluetooth/system/btif/include",
		"packages/modules/Bluetooth/system/stack/include",
		],
		srcs: [
		"a2dp_software_encoding.cc",
		"client_interface.cc",
		],
		shared_libs: [
		"android.hardware.bluetooth.audio@2.0",
		"libfmq",
		"libhidlbase",
		"libhidltransport",
		],
		static_libs: [
		"libosi",
		"libbt-common",
		],
		cflags: [
		"-DBUILDCFG",
		],
		}

		// Bluetooth Audio client interface library unit tests for target and host
		// ========================================================
		cc_test {
		name: "bluetooth-test-audio-hal-interface",
		defaults: ["fluoride_defaults"],
		include_dirs: [
		"packages/modules/Bluetooth/system",
		],
		srcs: [
		"client_interface_unittest.cc",
		],
		shared_libs: [
		"android.hardware.bluetooth.audio@2.0",
		"libcutils",
		"libfmq",
		"libhidlbase",
		"liblog",
		"libutils",
		],
		static_libs: [
		"libbt-audio-hal-interface",
		"libbt-common",
		],
		cflags: [
		"-DBUILDCFG",
		],
		}

system/audio_hal_interface/a2dp_software_encoding.cc

0 → 100644

+442 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright 2019 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		#include "a2dp_software_encoding.h"
		#include "client_interface.h"

		#include "btif_a2dp_source.h"
		#include "btif_av.h"
		#include "btif_av_co.h"
		#include "btif_hf.h"
		#include "osi/include/properties.h"

		namespace {

		using ::android::hardware::bluetooth::audio::V2_0::CodecType;
		using ::bluetooth::audio::AudioConfiguration;
		using ::bluetooth::audio::BitsPerSample;
		using ::bluetooth::audio::BluetoothAudioCtrlAck;
		using ::bluetooth::audio::ChannelMode;
		using ::bluetooth::audio::PcmParameters;
		using ::bluetooth::audio::SampleRate;
		using ::bluetooth::audio::SessionType;

		BluetoothAudioCtrlAck a2dp_ack_to_bt_audio_ctrl_ack(tA2DP_CTRL_ACK ack);
		bool a2dp_get_selected_hal_pcm_config(PcmParameters* pcm_config);

		// Provide call-in APIs for the Bluetooth Audio HAL
		class A2dpTransport : public ::bluetooth::audio::IBluetoothTransportInstance {
		public:
		A2dpTransport(SessionType sessionType, AudioConfiguration audioConfig)
		: IBluetoothTransportInstance(sessionType, std::move(audioConfig)),
		a2dp_pending_cmd_(A2DP_CTRL_CMD_NONE),
		remote_delay_report_(0),
		total_bytes_read_(0),
		data_position_({}){};

		BluetoothAudioCtrlAck StartRequest() override {
		// 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_a2dp_source_is_streaming()) {
		LOG(ERROR) << __func__ << ": source is busy streaming";
		return a2dp_ack_to_bt_audio_ctrl_ack(A2DP_CTRL_ACK_FAILURE);
		}

		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);
		}

		if (btif_av_stream_started_ready()) {
		// Already started, ACK back immediately.
		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 SuspendRequest() override {
		// 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 StopRequest() override {
		if (btif_av_get_peer_sep() == AVDT_TSEP_SNK &&
		!btif_a2dp_source_is_streaming()) {
		return;
		}
		LOG(INFO) << __func__ << ": handling";
		a2dp_pending_cmd_ = A2DP_CTRL_CMD_STOP;
		btif_av_stream_stop(RawAddress::kEmpty);
		}

		bool GetPresentationPosition(uint64_t* remote_delay_report_ns,
		uint64_t* total_bytes_read,
		timespec* data_position) override {
		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 MetadataChanged(const source_metadata_t& source_metadata) override {
		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;
		}
		}

		tA2DP_CTRL_CMD GetPendingCmd() const { return a2dp_pending_cmd_; }

		void ResetPendingCmd() { a2dp_pending_cmd_ = A2DP_CTRL_CMD_NONE; }

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

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

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

		private:
		tA2DP_CTRL_CMD a2dp_pending_cmd_;
		uint16_t remote_delay_report_;
		uint64_t total_bytes_read_;
		timespec data_position_;
		};

		A2dpTransport* a2dp_sink = nullptr;

		// Common interface to call-out into Bluetooth Audio HAL
		bluetooth::audio::BluetoothAudioClientInterface* a2dp_hal_clientif = nullptr;

		// Save the value if the remote reports its delay before a2dp_sink is
		// initialized
		uint16_t remote_delay = 0;

		bool btaudio_a2dp_legacy_supported = 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_pcm_config(PcmParameters* 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 = ::bluetooth::audio::BluetoothAudioClientInterface::
		kInvalidPcmConfiguration;
		return false;
		}

		// include/hardware/bt_av.h
		btav_a2dp_codec_config_t current_codec = a2dp_codec_configs->getCodecConfig();
		switch (current_codec.sample_rate) {
		case BTAV_A2DP_CODEC_SAMPLE_RATE_44100:
		pcm_config->sampleRate = SampleRate::RATE_44100;
		break;
		case BTAV_A2DP_CODEC_SAMPLE_RATE_48000:
		pcm_config->sampleRate = SampleRate::RATE_48000;
		break;
		case BTAV_A2DP_CODEC_SAMPLE_RATE_88200:
		pcm_config->sampleRate = SampleRate::RATE_88200;
		break;
		case BTAV_A2DP_CODEC_SAMPLE_RATE_96000:
		pcm_config->sampleRate = SampleRate::RATE_96000;
		break;
		case BTAV_A2DP_CODEC_SAMPLE_RATE_176400:
		pcm_config->sampleRate = SampleRate::RATE_176400;
		break;
		case BTAV_A2DP_CODEC_SAMPLE_RATE_192000:
		pcm_config->sampleRate = SampleRate::RATE_192000;
		break;
		case BTAV_A2DP_CODEC_SAMPLE_RATE_16000:
		pcm_config->sampleRate = SampleRate::RATE_16000;
		break;
		case BTAV_A2DP_CODEC_SAMPLE_RATE_24000:
		pcm_config->sampleRate = SampleRate::RATE_24000;
		break;
		case BTAV_A2DP_CODEC_SAMPLE_RATE_NONE:
		pcm_config->sampleRate = SampleRate::RATE_UNKNOWN;
		break;
		default:
		pcm_config->sampleRate = SampleRate::RATE_UNKNOWN;
		break;
		}
		switch (current_codec.bits_per_sample) {
		case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_16:
		pcm_config->bitsPerSample = BitsPerSample::BITS_16;
		break;
		case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_24:
		pcm_config->bitsPerSample = BitsPerSample::BITS_24;
		break;
		case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_32:
		pcm_config->bitsPerSample = BitsPerSample::BITS_32;
		break;
		case BTAV_A2DP_CODEC_BITS_PER_SAMPLE_NONE:
		pcm_config->bitsPerSample = BitsPerSample::BITS_UNKNOWN;
		break;
		default:
		pcm_config->bitsPerSample = BitsPerSample::BITS_UNKNOWN;
		break;
		}
		switch (current_codec.channel_mode) {
		case BTAV_A2DP_CODEC_CHANNEL_MODE_MONO:
		pcm_config->channelMode = ChannelMode::MONO;
		break;
		case BTAV_A2DP_CODEC_CHANNEL_MODE_STEREO:
		pcm_config->channelMode = ChannelMode::STEREO;
		break;
		case BTAV_A2DP_CODEC_CHANNEL_MODE_NONE:
		pcm_config->channelMode = ChannelMode::UNKNOWN;
		break;
		default:
		pcm_config->channelMode = ChannelMode::UNKNOWN;
		break;
		}
		return (pcm_config->sampleRate != SampleRate::RATE_UNKNOWN &&
		pcm_config->bitsPerSample != BitsPerSample::BITS_UNKNOWN &&
		pcm_config->channelMode != ChannelMode::UNKNOWN);
		}

		} // namespace

		namespace bluetooth {
		namespace audio {
		namespace a2dp {

		// Checking if new bluetooth_audio is supported
		bool is_hal_2_0_supported() {
		// we do not support offloading yet
		if (btif_av_is_a2dp_offload_enabled()) return false;
		if (!is_configured) {
		btaudio_a2dp_legacy_supported =
		osi_property_get_bool(BLUETOOTH_AUDIO_PROP_ENABLED, false);
		is_configured = true;
		}
		return btaudio_a2dp_legacy_supported;
		}

		// Checking if new bluetooth_audio is enabled
		bool is_hal_2_0_enabled() { return a2dp_hal_clientif != nullptr; }

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

		if (!is_hal_2_0_supported()) {
		LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not supported";
		return false;
		}

		PcmParameters pcm_config{};
		a2dp_get_selected_hal_pcm_config(&pcm_config);
		AudioConfiguration audio_config{};
		audio_config.pcmConfig(pcm_config);
		a2dp_sink = new A2dpTransport(SessionType::A2DP_SOFTWARE_ENCODING_DATAPATH,
		audio_config);
		a2dp_hal_clientif = new bluetooth::audio::BluetoothAudioClientInterface(
		a2dp_sink, message_loop);
		if (remote_delay != 0) {
		LOG(INFO) << __func__ << ": restore DELAY "
		<< static_cast<float>(remote_delay / 10.0) << " ms";
		a2dp_sink->SetRemoteDelay(remote_delay);
		remote_delay = 0;
		}
		return true;
		}

		// Clean up BluetoothAudio HAL
		void cleanup() {
		if (!is_hal_2_0_enabled()) return;
		end_session();
		delete a2dp_hal_clientif;
		a2dp_hal_clientif = nullptr;
		delete a2dp_sink;
		a2dp_sink = nullptr;
		remote_delay = 0;
		}

		// Set up the codec into BluetoothAudio HAL
		bool setup_codec() {
		if (!is_hal_2_0_supported()) {
		LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not supported";
		return false;
		}
		PcmParameters pcm_config{};
		AudioConfiguration audio_config{};
		if (a2dp_get_selected_hal_pcm_config(&pcm_config)) {
		audio_config.pcmConfig(pcm_config);
		return a2dp_hal_clientif->UpdateAudioConfig(audio_config);
		}
		return false;
		}

		void start_session() {
		if (!is_hal_2_0_supported()) {
		LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not supported";
		return;
		}
		a2dp_hal_clientif->StartSession();
		}

		void end_session() {
		if (!is_hal_2_0_supported()) {
		LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not supported";
		return;
		}
		a2dp_hal_clientif->EndSession();
		}

		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 pending_cmd = a2dp_sink->GetPendingCmd();
		if (pending_cmd == A2DP_CTRL_CMD_START) {
		a2dp_hal_clientif->StreamStarted(ctrl_ack);
		} else {
		LOG(WARNING) << __func__ << ": pending=" << pending_cmd
		<< " ignore result=" << ctrl_ack;
		return;
		}
		if (ctrl_ack != bluetooth::audio::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 pending_cmd = a2dp_sink->GetPendingCmd();
		if (pending_cmd == A2DP_CTRL_CMD_SUSPEND) {
		a2dp_hal_clientif->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 != bluetooth::audio::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_2_0_supported()) {
		LOG(ERROR) << __func__ << ": BluetoothAudio HAL is not supported";
		return 0;
		}
		return a2dp_hal_clientif->ReadAudioData(p_buf, len);
		}

		// Update A2DP delay report to BluetoothAudio HAL
		void set_remote_delay(uint16_t delay_report) {
		if (!is_hal_2_0_enabled()) {
		LOG(INFO) << __func__ << ": not ready for DelayReport "
		<< static_cast<float>(delay_report / 10.0) << " ms";
		remote_delay = delay_report;
		return;
		}
		LOG(INFO) << __func__ << ": DELAY " << static_cast<float>(delay_report / 10.0)
		<< " ms";
		a2dp_sink->SetRemoteDelay(delay_report);
		}

		} // namespace a2dp
		} // namespace audio
		} // namespace bluetooth

system/audio_hal_interface/a2dp_software_encoding.h

0 → 100644

+55 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright 2019 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.
		*/

		#pragma once

		#include "audio_a2dp_hw/include/audio_a2dp_hw.h"
		#include "common/message_loop_thread.h"

		namespace bluetooth {
		namespace audio {
		namespace a2dp {

		bool is_hal_2_0_supported();

		// Check if new bluetooth_audio is enabled
		bool is_hal_2_0_enabled();

		// Initialize BluetoothAudio HAL: openProvider
		bool init(bluetooth::common::MessageLoopThread* message_loop);

		// Clean up BluetoothAudio HAL
		void cleanup();

		// Set up the codec into BluetoothAudio HAL
		bool setup_codec();

		// Send command to the BluetoothAudio HAL: StartSession, EndSession,
		// StreamStarted, StreamSuspended
		void start_session();
		void end_session();
		void ack_stream_started(const tA2DP_CTRL_ACK& status);
		void ack_stream_suspended(const tA2DP_CTRL_ACK& status);

		// Read from the FMQ of BluetoothAudio HAL
		size_t read(uint8_t* p_buf, uint32_t len);

		// Update A2DP delay report to BluetoothAudio HAL
		void set_remote_delay(uint16_t delay_report);

		} // namespace a2dp
		} // namespace audio
		} // namespace bluetooth

system/audio_hal_interface/client_interface.cc

0 → 100644

+486 −0

File added.

Preview size limit exceeded, changes collapsed.