Add Bluetooth Audio default AIDL implementation
Test: manual
Bug: 203490261
Change-Id: I39224ecdd18b9eb0626d6188442a33ef65820673
diff --git a/bluetooth/audio/aidl/default/HearingAidAudioProvider.cpp b/bluetooth/audio/aidl/default/HearingAidAudioProvider.cpp
new file mode 100644
index 0000000..a993059
--- /dev/null
+++ b/bluetooth/audio/aidl/default/HearingAidAudioProvider.cpp
@@ -0,0 +1,95 @@
+/*
+ * 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, 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,
+ _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);
+ }
+ auto desc = data_mq_->dupeDesc();
+ BluetoothAudioSessionReport::OnSessionStarted(session_type_, stack_iface_,
+ &desc, *audio_config_);
+ *_aidl_return = data_mq_->dupeDesc();
+ return ndk::ScopedAStatus::ok();
+}
+
+} // namespace audio
+} // namespace bluetooth
+} // namespace hardware
+} // namespace android
+} // namespace aidl
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