Merge "RAS: cached supported feature and vendor specifc data" into main (252970e5) · Commits · e / os / android_packages_modules_Bluetooth

system/bta/ras/ras_client.cc

+111 −32

Original line number	Diff line number	Diff line
		@@ -35,13 +35,24 @@ class RasClientImpl;
		RasClientImpl* instance;

		enum CallbackDataType { VENDOR_SPECIFIC_REPLY };
		static constexpr uint16_t kCachedDataSize = 10;

		class RasClientImpl : public bluetooth::ras::RasClient {
		public:
		struct GattReadCallbackData {
		const bool is_last_;
		};

		struct GattWriteCallbackData {
		const CallbackDataType type_;
		};

		struct CachedRasData {
		uint8_t id_ = 0;
		uint32_t remote_supported_features_;
		std::unordered_map<bluetooth::Uuid, std::vector<uint8_t>> vendor_specific_data_;
		};

		struct RasTracker {
		RasTracker(const RawAddress& address, const RawAddress& address_for_cs)
		: address_(address), address_for_cs_(address_for_cs) {}
		@@ -239,23 +250,26 @@ public:
		ListCharacteristic(tracker);
		}

		if (UseCachedData(tracker)) {
		log::info("Use cached data for Ras features and vendor specific characteristic");
		SubscribeCharacteristic(tracker, kRasControlPointCharacteristic);
		AllCharacteristicsReadComplete(tracker);
		} else {
		// Read Vendor Specific Uuid
		if (!tracker->vendor_specific_characteristics_.empty()) {
		for (auto& vendor_specific_characteristic : tracker->vendor_specific_characteristics_) {
		log::debug("Read vendor specific characteristic uuid {}",
		vendor_specific_characteristic.characteristicUuid_);
		auto characteristic = tracker->FindCharacteristicByUuid(
		vendor_specific_characteristic.characteristicUuid_);

		BTA_GATTC_ReadCharacteristic(
		tracker->conn_id_, characteristic->value_handle, GATT_AUTH_REQ_NO_MITM,
		[](uint16_t conn_id, tGATT_STATUS status, uint16_t handle, uint16_t len,
		uint8_t* value, void* data) {
		instance->OnReadCharacteristicCallback(conn_id, status, handle, len, value, data);
		instance->OnReadCharacteristicCallback(conn_id, status, handle, len, value,
		data);
		},
		nullptr);
		}
		}

		// Read Ras Features
		log::info("Read Ras Features");
		@@ -266,14 +280,37 @@ public:
		}
		BTA_GATTC_ReadCharacteristic(
		tracker->conn_id_, characteristic->value_handle, GATT_AUTH_REQ_NO_MITM,
		[](uint16_t conn_id, tGATT_STATUS status, uint16_t handle, uint16_t len, uint8_t* value,
		void* data) {
		[](uint16_t conn_id, tGATT_STATUS status, uint16_t handle, uint16_t len,
		uint8_t* value, void* data) {
		instance->OnReadCharacteristicCallback(conn_id, status, handle, len, value, data);
		},
		nullptr);
		&gatt_read_callback_data_);

		SubscribeCharacteristic(tracker, kRasControlPointCharacteristic);
		}
		}

		bool UseCachedData(std::shared_ptr<RasTracker> tracker) {
		auto cached_data = cached_data_.find(tracker->address_);
		if (cached_data == cached_data_.end()) {
		return false;
		}

		// Check if everything is cached
		auto cached_vendor_specific_data = cached_data->second.vendor_specific_data_;
		for (auto& vendor_specific_characteristic : tracker->vendor_specific_characteristics_) {
		auto uuid = vendor_specific_characteristic.characteristicUuid_;
		if (cached_vendor_specific_data.find(uuid) != cached_vendor_specific_data.end()) {
		vendor_specific_characteristic.value_ = cached_vendor_specific_data[uuid];
		} else {
		return false;
		}
		}

		// Update remote supported features
		tracker->remote_supported_features_ = cached_data->second.remote_supported_features_;
		return true;
		}

		void OnGattNotification(const tBTA_GATTC_NOTIFY& evt) {
		auto tracker = FindTrackerByHandle(evt.conn_id);
		@@ -574,6 +611,20 @@ public:
		STREAM_TO_UINT32(tracker->remote_supported_features_, value);
		log::info("Remote supported features : {}",
		getFeaturesString(tracker->remote_supported_features_));
		} break;
		default:
		log::warn("Unexpected UUID");
		}

		// Check is last read reply or not
		GattReadCallbackData* cb_data = static_cast<GattReadCallbackData*>(data);
		if (cb_data != nullptr) {
		StoreCachedData(tracker);
		AllCharacteristicsReadComplete(tracker);
		}
		}

		void AllCharacteristicsReadComplete(std::shared_ptr<RasTracker> tracker) {
		if (tracker->remote_supported_features_ & feature::kRealTimeRangingData) {
		log::info("Subscribe Real-time Ranging Data");
		SubscribeCharacteristic(tracker, kRasRealTimeRangingDataCharacteristic);
		@@ -584,13 +635,39 @@ public:
		SubscribeCharacteristic(tracker, kRasRangingDataOverWrittenCharacteristic);
		}
		uint16_t att_handle =
		tracker->FindCharacteristicByUuid(kRasRealTimeRangingDataCharacteristic)
		->value_handle;
		tracker->FindCharacteristicByUuid(kRasRealTimeRangingDataCharacteristic)->value_handle;
		callbacks_->OnConnected(tracker->address_for_cs_, att_handle,
		tracker->vendor_specific_characteristics_);
		} break;
		default:
		log::warn("Unexpected UUID");
		}

		void StoreCachedData(std::shared_ptr<RasTracker> tracker) {
		auto address = tracker->address_;
		auto cached_data = cached_data_.find(address);
		if (cached_data == cached_data_.end()) {
		uint8_t next_id = cached_data_.size();
		// Remove oldest cached data
		if (cached_data_.size() >= kCachedDataSize) {
		auto oldest_cached_data = std::min_element(
		cached_data_.begin(), cached_data_.end(),
		[](const auto& a, const auto& b) { return a.second.id_ < b.second.id_; });
		next_id = oldest_cached_data->second.id_ + kCachedDataSize;
		cached_data_.erase(oldest_cached_data);
		}

		// Create new cached data
		log::debug("Create new cached data {}", address);
		cached_data_[address].id_ = next_id;
		cached_data_[address].remote_supported_features_ = tracker->remote_supported_features_;
		for (auto data : tracker->vendor_specific_characteristics_) {
		cached_data_[address].vendor_specific_data_[data.characteristicUuid_] = data.value_;
		}

		// Check if the id will outside the valid range for the next data entry
		if (cached_data_[address].id_ == 255) {
		for (auto& [key, value] : cached_data_) {
		value.id_ %= (256 - kCachedDataSize);
		}
		}
		}
		}

		@@ -647,6 +724,8 @@ private:
		uint16_t gatt_if_;
		std::list<std::shared_ptr<RasTracker>> trackers_;
		bluetooth::ras::RasClientCallbacks* callbacks_;
		std::unordered_map<RawAddress, CachedRasData> cached_data_;
		GattReadCallbackData gatt_read_callback_data_{true};
		GattWriteCallbackData gatt_write_callback_data_{CallbackDataType::VENDOR_SPECIFIC_REPLY};
		};