97 lines
3.6 KiB
C++
97 lines
3.6 KiB
C++
/*
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* Copyright (C) 2022 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 "BTAudioProviderHearingAid"
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#include "HearingAidAudioProvider.h"
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#include <BluetoothAudioCodecs.h>
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#include <BluetoothAudioSessionReport.h>
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#include <android-base/logging.h>
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namespace aidl {
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namespace android {
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namespace hardware {
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namespace bluetooth {
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namespace audio {
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static constexpr uint32_t kPcmFrameSize = 4; // 16 bits per sample / stereo
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static constexpr uint32_t kPcmFrameCount = 128;
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static constexpr uint32_t kRtpFrameSize = kPcmFrameSize * kPcmFrameCount;
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static constexpr uint32_t kRtpFrameCount = 7; // max counts by 1 tick (20ms)
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static constexpr uint32_t kBufferSize = kRtpFrameSize * kRtpFrameCount;
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static constexpr uint32_t kBufferCount = 1; // single buffer
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static constexpr uint32_t kDataMqSize = kBufferSize * kBufferCount;
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HearingAidAudioProvider::HearingAidAudioProvider()
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: BluetoothAudioProvider(), data_mq_(nullptr) {
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LOG(INFO) << __func__ << " - size of audio buffer " << kDataMqSize
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<< " byte(s)";
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std::unique_ptr<DataMQ> data_mq(
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new DataMQ(kDataMqSize, /* EventFlag */ true));
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if (data_mq && data_mq->isValid()) {
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data_mq_ = std::move(data_mq);
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session_type_ = SessionType::HEARING_AID_SOFTWARE_ENCODING_DATAPATH;
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} else {
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ALOGE_IF(!data_mq, "failed to allocate data MQ");
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ALOGE_IF(data_mq && !data_mq->isValid(), "data MQ is invalid");
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}
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}
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bool HearingAidAudioProvider::isValid(const SessionType& sessionType) {
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return (sessionType == session_type_ && data_mq_ && data_mq_->isValid());
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}
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ndk::ScopedAStatus HearingAidAudioProvider::startSession(
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const std::shared_ptr<IBluetoothAudioPort>& host_if,
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const AudioConfiguration& audio_config,
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const std::vector<LatencyMode>& latency_modes, DataMQDesc* _aidl_return) {
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if (audio_config.getTag() != AudioConfiguration::pcmConfig) {
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LOG(WARNING) << __func__ << " - Invalid Audio Configuration="
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<< audio_config.toString();
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*_aidl_return = DataMQDesc();
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return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
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}
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const auto& pcm_config = audio_config.get<AudioConfiguration::pcmConfig>();
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if (!BluetoothAudioCodecs::IsSoftwarePcmConfigurationValid(pcm_config)) {
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LOG(WARNING) << __func__ << " - Unsupported PCM Configuration="
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<< pcm_config.toString();
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*_aidl_return = DataMQDesc();
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return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
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}
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return BluetoothAudioProvider::startSession(
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host_if, audio_config, latency_modes, _aidl_return);
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}
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ndk::ScopedAStatus HearingAidAudioProvider::onSessionReady(
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DataMQDesc* _aidl_return) {
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if (data_mq_ == nullptr || !data_mq_->isValid()) {
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*_aidl_return = DataMQDesc();
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return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
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}
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*_aidl_return = data_mq_->dupeDesc();
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auto desc = data_mq_->dupeDesc();
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BluetoothAudioSessionReport::OnSessionStarted(
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session_type_, stack_iface_, &desc, *audio_config_, latency_modes_);
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return ndk::ScopedAStatus::ok();
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}
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} // namespace audio
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} // namespace bluetooth
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} // namespace hardware
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} // namespace android
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} // namespace aidl
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