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256 lines
8.1 KiB
256 lines
8.1 KiB
/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "BTAudioClientHearingAid"
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#include "hearing_aid_software_encoding.h"
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#include "client_interface.h"
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#include "audio_hearing_aid_hw/include/audio_hearing_aid_hw.h"
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#include "osi/include/log.h"
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#include "osi/include/properties.h"
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namespace {
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using ::android::hardware::bluetooth::audio::V2_0::CodecType;
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using ::bluetooth::audio::AudioConfiguration;
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using ::bluetooth::audio::BitsPerSample;
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using ::bluetooth::audio::BluetoothAudioCtrlAck;
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using ::bluetooth::audio::ChannelMode;
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using ::bluetooth::audio::PcmParameters;
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using ::bluetooth::audio::SampleRate;
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using ::bluetooth::audio::SessionType;
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using ::bluetooth::audio::SessionType_2_1;
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using ::bluetooth::audio::hearing_aid::StreamCallbacks;
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// Transport implementation for Hearing Aids
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class HearingAidTransport
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: public bluetooth::audio::IBluetoothSinkTransportInstance {
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public:
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HearingAidTransport(StreamCallbacks stream_cb)
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: IBluetoothSinkTransportInstance(
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SessionType::HEARING_AID_SOFTWARE_ENCODING_DATAPATH, {}),
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stream_cb_(std::move(stream_cb)),
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remote_delay_report_ms_(0),
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total_bytes_read_(0),
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data_position_({}){};
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BluetoothAudioCtrlAck StartRequest() override {
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LOG(INFO) << __func__;
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if (stream_cb_.on_resume_(true)) {
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return BluetoothAudioCtrlAck::SUCCESS_FINISHED;
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}
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return BluetoothAudioCtrlAck::FAILURE;
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}
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BluetoothAudioCtrlAck SuspendRequest() override {
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LOG(INFO) << __func__;
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if (stream_cb_.on_suspend_()) {
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uint8_t p_buf[AUDIO_STREAM_OUTPUT_BUFFER_SZ * 2];
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::bluetooth::audio::hearing_aid::read(p_buf, sizeof(p_buf));
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return BluetoothAudioCtrlAck::SUCCESS_FINISHED;
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} else {
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return BluetoothAudioCtrlAck::FAILURE;
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}
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}
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void StopRequest() override {
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LOG(INFO) << __func__;
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if (stream_cb_.on_suspend_()) {
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// flush
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uint8_t p_buf[AUDIO_STREAM_OUTPUT_BUFFER_SZ * 2];
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::bluetooth::audio::hearing_aid::read(p_buf, sizeof(p_buf));
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}
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}
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bool GetPresentationPosition(uint64_t* remote_delay_report_ns,
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uint64_t* total_bytes_read,
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timespec* data_position) override {
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VLOG(2) << __func__ << ": data=" << total_bytes_read_
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<< " byte(s), timestamp=" << data_position_.tv_sec << "."
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<< data_position_.tv_nsec
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<< "s, delay report=" << remote_delay_report_ms_ << " msec.";
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if (remote_delay_report_ns != nullptr) {
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*remote_delay_report_ns = remote_delay_report_ms_ * 1000000u;
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}
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if (total_bytes_read != nullptr) *total_bytes_read = total_bytes_read_;
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if (data_position != nullptr) *data_position = data_position_;
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return true;
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}
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void MetadataChanged(const source_metadata_t& source_metadata) override {
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auto track_count = source_metadata.track_count;
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auto tracks = source_metadata.tracks;
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LOG(INFO) << __func__ << ": " << track_count << " track(s) received";
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while (track_count) {
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VLOG(1) << __func__ << ": usage=" << tracks->usage
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<< ", content_type=" << tracks->content_type
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<< ", gain=" << tracks->gain;
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--track_count;
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++tracks;
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}
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}
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void ResetPresentationPosition() override {
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VLOG(2) << __func__ << ": called.";
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remote_delay_report_ms_ = 0;
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total_bytes_read_ = 0;
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data_position_ = {};
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}
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void LogBytesRead(size_t bytes_read) override {
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if (bytes_read) {
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total_bytes_read_ += bytes_read;
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clock_gettime(CLOCK_MONOTONIC, &data_position_);
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}
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}
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void SetRemoteDelay(uint16_t delay_report_ms) {
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LOG(INFO) << __func__ << ": delay_report=" << delay_report_ms << " msec";
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remote_delay_report_ms_ = delay_report_ms;
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}
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private:
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StreamCallbacks stream_cb_;
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uint16_t remote_delay_report_ms_;
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uint64_t total_bytes_read_;
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timespec data_position_;
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};
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bool HearingAidGetSelectedHalPcmConfig(PcmParameters* hal_pcm_config) {
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if (hal_pcm_config == nullptr) return false;
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// TODO: we only support one config for now!
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hal_pcm_config->sampleRate = SampleRate::RATE_16000;
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hal_pcm_config->bitsPerSample = BitsPerSample::BITS_16;
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hal_pcm_config->channelMode = ChannelMode::STEREO;
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return true;
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}
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// Sink instance of Hearing Aids to provide call-in APIs for Bluetooth Audio Hal
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HearingAidTransport* hearing_aid_sink = nullptr;
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// Common interface to call-out into Bluetooth Audio Hal
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bluetooth::audio::BluetoothAudioSinkClientInterface*
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hearing_aid_hal_clientinterface = nullptr;
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bool btaudio_hearing_aid_disabled = false;
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bool is_configured = false;
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// Save the value if the remote reports its delay before hearing_aid_sink is
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// initialized
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uint16_t remote_delay_ms = 0;
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bool is_hal_2_0_force_disabled() {
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if (!is_configured) {
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btaudio_hearing_aid_disabled = osi_property_get_bool(BLUETOOTH_AUDIO_HAL_PROP_DISABLED, false);
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is_configured = true;
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}
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return btaudio_hearing_aid_disabled;
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}
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} // namespace
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namespace bluetooth {
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namespace audio {
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namespace hearing_aid {
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bool is_hal_2_0_enabled() { return hearing_aid_hal_clientinterface != nullptr; }
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bool init(StreamCallbacks stream_cb,
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bluetooth::common::MessageLoopThread* message_loop) {
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LOG(INFO) << __func__;
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if (is_hal_2_0_force_disabled()) {
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LOG(ERROR) << __func__ << ": BluetoothAudio HAL is disabled";
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return false;
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}
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hearing_aid_sink = new HearingAidTransport(std::move(stream_cb));
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hearing_aid_hal_clientinterface =
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new bluetooth::audio::BluetoothAudioSinkClientInterface(hearing_aid_sink,
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message_loop);
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if (!hearing_aid_hal_clientinterface->IsValid()) {
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LOG(WARNING) << __func__ << ": BluetoothAudio HAL for Hearing Aid is invalid?!";
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delete hearing_aid_hal_clientinterface;
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hearing_aid_hal_clientinterface = nullptr;
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delete hearing_aid_sink;
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hearing_aid_sink = nullptr;
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return false;
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}
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if (remote_delay_ms != 0) {
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LOG(INFO) << __func__ << ": restore DELAY " << remote_delay_ms << " ms";
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hearing_aid_sink->SetRemoteDelay(remote_delay_ms);
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remote_delay_ms = 0;
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}
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return true;
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}
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void cleanup() {
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LOG(INFO) << __func__;
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if (!is_hal_2_0_enabled()) return;
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end_session();
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delete hearing_aid_hal_clientinterface;
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hearing_aid_hal_clientinterface = nullptr;
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delete hearing_aid_sink;
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hearing_aid_sink = nullptr;
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remote_delay_ms = 0;
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}
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void start_session() {
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LOG(INFO) << __func__;
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if (!is_hal_2_0_enabled()) return;
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AudioConfiguration audio_config;
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PcmParameters pcm_config{};
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if (!HearingAidGetSelectedHalPcmConfig(&pcm_config)) {
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LOG(ERROR) << __func__ << ": cannot get PCM config";
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return;
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}
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audio_config.pcmConfig(pcm_config);
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if (!hearing_aid_hal_clientinterface->UpdateAudioConfig(audio_config)) {
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LOG(ERROR) << __func__ << ": cannot update audio config to HAL";
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return;
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}
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hearing_aid_hal_clientinterface->StartSession();
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}
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void end_session() {
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LOG(INFO) << __func__;
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if (!is_hal_2_0_enabled()) return;
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hearing_aid_hal_clientinterface->EndSession();
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}
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size_t read(uint8_t* p_buf, uint32_t len) {
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if (!is_hal_2_0_enabled()) return 0;
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return hearing_aid_hal_clientinterface->ReadAudioData(p_buf, len);
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}
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// Update Hearing Aids delay report to BluetoothAudio HAL
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void set_remote_delay(uint16_t delay_report_ms) {
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if (!is_hal_2_0_enabled()) {
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LOG(INFO) << __func__ << ": not ready for DelayReport " << delay_report_ms
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<< " ms";
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remote_delay_ms = delay_report_ms;
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return;
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}
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LOG(INFO) << __func__ << ": delay_report_ms=" << delay_report_ms << " ms";
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hearing_aid_sink->SetRemoteDelay(delay_report_ms);
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}
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} // namespace hearing_aid
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} // namespace audio
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} // namespace bluetooth
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