Use Headtracker codec metadata for transport support (9c716b2d) · Commits · e / os / android_packages_modules_Bluetooth

system/bta/le_audio/devices.cc

+69 −12

Original line number	Diff line number	Diff line
		@@ -409,6 +409,74 @@ LeAudioDevice::~LeAudioDevice(void) {
		this->ClearPACs();
		}

		void LeAudioDevice::ParseHeadtrackingCodec(
		const struct types::acs_ac_record& pac) {
		if (!com::android::bluetooth::flags::leaudio_dynamic_spatial_audio()) {
		return;
		}

		if (pac.codec_id == types::kLeAudioCodecHeadtracking) {
		log::info("Headtracking supported");

		// Assume LE-ISO is supported if metadata is not available
		dsa_.modes = {
		DsaMode::DISABLED,
		DsaMode::ISO_SW,
		DsaMode::ISO_HW,
		};

		if (!com::android::bluetooth::flags::headtracker_codec_capability()) {
		return;
		}

		/*
		* Android Headtracker Codec Metadata description
		* length: 5
		* type: 0xFF
		* value: {
		* vendorId: 0x00E0 (Google)
		* vendorSpecificMetadata: {
		* length: 1
		* type: 1 (Headtracker supported transports)
		* value: x
		* }
		* }
		*/
		std::vector<uint8_t> ltv = pac.metadata;
		if (ltv.size() < 7) {
		log::info("Headtracker codec does not have metadata");
		return;
		}

		if (ltv[0] < 5 \|\| ltv[1] != types::kLeAudioMetadataTypeVendorSpecific \|\|
		ltv[2] != (types::kLeAudioVendorCompanyIdGoogle & 0xFF) \|\|
		ltv[3] != (types::kLeAudioVendorCompanyIdGoogle >> 8) \|\|
		ltv[4] != types::kLeAudioMetadataHeadtrackerTransportLen \|\|
		ltv[5] != types::kLeAudioMetadataHeadtrackerTransportVal) {
		log::warn("Headtracker codec metadata invalid");
		return;
		}

		uint8_t supported_transports = ltv[6];
		DsaModes dsa_modes = {DsaMode::DISABLED};

		if ((supported_transports &
		types::kLeAudioMetadataHeadtrackerTransportLeAcl) != 0) {
		log::debug("Headtracking supported over LE-ACL");
		dsa_modes.push_back(DsaMode::ACL);
		}

		if ((supported_transports &
		types::kLeAudioMetadataHeadtrackerTransportLeIso) != 0) {
		log::debug("Headtracking supported over LE-ISO");
		dsa_modes.push_back(DsaMode::ISO_SW);
		dsa_modes.push_back(DsaMode::ISO_HW);
		}

		dsa_.modes = dsa_modes;
		}
		}

		void LeAudioDevice::RegisterPACs(
		std::vector<struct types::acs_ac_record>* pac_db,
		std::vector<struct types::acs_ac_record>* pac_recs) {
		@@ -441,18 +509,7 @@ void LeAudioDevice::RegisterPACs(
		<< base::HexEncode(pac.metadata.data(), pac.metadata.size());
		log::debug("{}", debug_str.str());

		if (com::android::bluetooth::flags::leaudio_dynamic_spatial_audio()) {
		if (pac.codec_id == types::kLeAudioCodecHeadtracking) {
		log::info("Headtracking supported");
		/* Todo: Set DSA modes according to the codec configuration */
		dsa_.modes = {
		DsaMode::DISABLED,
		DsaMode::ISO_SW,
		DsaMode::ISO_HW,
		};
		/* Todo: Remove the headtracking codec from the list */
		}
		}
		ParseHeadtrackingCodec(pac);
		}

		pac_db->insert(pac_db->begin(), pac_recs->begin(), pac_recs->end());

system/bta/le_audio/devices.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -258,6 +258,7 @@ class LeAudioDevice {

		void DumpPacsDebugState(std::stringstream& stream,
		types::PublishedAudioCapabilities pacs);
		void ParseHeadtrackingCodec(const struct types::acs_ac_record& pac);
		};

		/* LeAudioDevices class represents a wraper helper over all devices in le audio

system/bta/le_audio/le_audio_types.h

+7 −1

Original line number	Diff line number	Diff line
		@@ -288,7 +288,6 @@ constexpr uint16_t kLeAudioVendorCompanyIdUndefined = 0x00;
		constexpr uint16_t kLeAudioVendorCodecIdUndefined = 0x00;

		constexpr uint16_t kLeAudioVendorCompanyIdGoogle = 0x00E0;
		/* Todo: Temporary value */
		constexpr uint16_t kLeAudioVendorCodecIdHeadtracking = 0x0001;

		/* Metadata types from Assigned Numbers */
		@@ -297,12 +296,19 @@ constexpr uint8_t kLeAudioMetadataTypeStreamingAudioContext = 0x02;
		constexpr uint8_t kLeAudioMetadataTypeProgramInfo = 0x03;
		constexpr uint8_t kLeAudioMetadataTypeLanguage = 0x04;
		constexpr uint8_t kLeAudioMetadataTypeCcidList = 0x05;
		constexpr uint8_t kLeAudioMetadataTypeVendorSpecific = 0xFF;

		constexpr uint8_t kLeAudioMetadataTypeLen = 1;
		constexpr uint8_t kLeAudioMetadataLenLen = 1;

		constexpr uint8_t kLeAudioMetadataStreamingAudioContextLen = 2;

		/* Android Headtracker Codec metadata */
		constexpr uint8_t kLeAudioMetadataHeadtrackerTransportLen = 1;
		constexpr uint8_t kLeAudioMetadataHeadtrackerTransportVal = 1;
		constexpr uint8_t kLeAudioMetadataHeadtrackerTransportLeAcl = 1;
		constexpr uint8_t kLeAudioMetadataHeadtrackerTransportLeIso = 2;

		/* CSIS Types */
		constexpr uint8_t kDefaultScanDurationS = 5;
		constexpr uint8_t kDefaultCsisSetSize = 2;