Implementation of Bluetooth Audio HAL interface v2
This is the default implementation of Bluetooth Audio Hal v2, and 3
providers are defined.
* BluetoothAudioProvider is the default provider, which is a stub when
no SessionType matched.
* A2dpSoftwareAudioProvider uses to replace the old A2DP legacy module
and uses IPC via HIDL interface between Bluetooth stack and Audio HAL.
* HearingAidAudioProvider uses to replace the Hearing Aids module which
uses UNIX socket as IPC and now there is HIDL based interface.
There is also a shared library named "libbluetooth_audio_session.so" to
provide the linkage directly between this HIDL and its HAL module,
bluetooth_audio. With this library, we can break the library dependency
and guarantee those symbols of libraries while compiling.
Bug: 111519504
Bug: 122503379
Test: boot and manual test
Change-Id: I54d86291482b7fb041a3ac3e171b68a4ed7bfa07
diff --git a/bluetooth/audio/2.0/default/A2dpOffloadAudioProvider.cpp b/bluetooth/audio/2.0/default/A2dpOffloadAudioProvider.cpp
new file mode 100644
index 0000000..84fba34
--- /dev/null
+++ b/bluetooth/audio/2.0/default/A2dpOffloadAudioProvider.cpp
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2018 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 "BTAudioProviderA2dpOffload"
+
+#include <android-base/logging.h>
+#include <fmq/MessageQueue.h>
+#include <hidl/MQDescriptor.h>
+
+#include "A2dpOffloadAudioProvider.h"
+#include "BluetoothAudioSessionReport.h"
+#include "BluetoothAudioSupportedCodecsDB.h"
+
+namespace android {
+namespace hardware {
+namespace bluetooth {
+namespace audio {
+namespace V2_0 {
+namespace implementation {
+
+using ::android::bluetooth::audio::BluetoothAudioSessionReport;
+using ::android::hardware::kSynchronizedReadWrite;
+using ::android::hardware::MessageQueue;
+using ::android::hardware::Void;
+
+using DataMQ = MessageQueue<uint8_t, kSynchronizedReadWrite>;
+
+A2dpOffloadAudioProvider::A2dpOffloadAudioProvider()
+ : BluetoothAudioProvider() {
+ session_type_ = SessionType::A2DP_HARDWARE_OFFLOAD_DATAPATH;
+}
+
+bool A2dpOffloadAudioProvider::isValid(const SessionType& sessionType) {
+ return (sessionType == session_type_);
+}
+
+Return<void> A2dpOffloadAudioProvider::startSession(
+ const sp<IBluetoothAudioPort>& hostIf,
+ const AudioConfiguration& audioConfig, startSession_cb _hidl_cb) {
+ /**
+ * Initialize the audio platform if audioConfiguration is supported.
+ * Save the the IBluetoothAudioPort interface, so that it can be used
+ * later to send stream control commands to the HAL client, based on
+ * interaction with Audio framework.
+ */
+ if (audioConfig.getDiscriminator() !=
+ AudioConfiguration::hidl_discriminator::codecConfig) {
+ LOG(WARNING) << __func__
+ << " - Invalid Audio Configuration=" << toString(audioConfig);
+ _hidl_cb(BluetoothAudioStatus::UNSUPPORTED_CODEC_CONFIGURATION,
+ DataMQ::Descriptor());
+ return Void();
+ } else if (!android::bluetooth::audio::IsOffloadCodecConfigurationValid(
+ session_type_, audioConfig.codecConfig())) {
+ _hidl_cb(BluetoothAudioStatus::UNSUPPORTED_CODEC_CONFIGURATION,
+ DataMQ::Descriptor());
+ return Void();
+ }
+
+ return BluetoothAudioProvider::startSession(hostIf, audioConfig, _hidl_cb);
+}
+
+Return<void> A2dpOffloadAudioProvider::onSessionReady(
+ startSession_cb _hidl_cb) {
+ BluetoothAudioSessionReport::OnSessionStarted(session_type_, stack_iface_,
+ nullptr, audio_config_);
+ _hidl_cb(BluetoothAudioStatus::SUCCESS, DataMQ::Descriptor());
+ return Void();
+}
+
+} // namespace implementation
+} // namespace V2_0
+} // namespace audio
+} // namespace bluetooth
+} // namespace hardware
+} // namespace android