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