Merge "Get default provider codec from HAL" (d563e5bc) · Commits · e / os / android_hardware_interfaces

bluetooth/audio/2.2/IBluetoothAudioProvidersFactory.hal

+22 −0

Original line number	Diff line number	Diff line
		@@ -48,4 +48,26 @@ interface IBluetoothAudioProvidersFactory extends @2.1::IBluetoothAudioProviders
		*/
		openProvider_2_2(SessionType sessionType)
		generates (Status status, IBluetoothAudioProvider provider);

		/**
		* Gets a list of audio capabilities for a session type.
		*
		* For software encoding, the PCM capabilities are returned.
		* For hardware encoding, the supported codecs and their capabilities are
		* returned.
		*
		* @param sessionType The session type (e.g.
		* A2DP_SOFTWARE_ENCODING_DATAPATH).
		* @return audioCapabilities A list containing all the capabilities
		* supported by the sesson type. The capabilities is a list of
		* available options when configuring the codec for the session.
		* For software encoding it is the PCM data rate.
		* For hardware encoding it is the list of supported codecs and their
		* capabilities.
		* If a provider isn't supported, an empty list should be returned.
		* Note: Only one entry should exist per codec when using hardware
		* encoding.
		*/
		getProviderCapabilities_2_2(SessionType sessionType)
		generates (vec<AudioCapabilities> audioCapabilities);
		};

bluetooth/audio/2.2/default/BluetoothAudioProvidersFactory.cpp

+41 −0

Original line number	Diff line number	Diff line
		@@ -221,6 +221,47 @@ Return<void> BluetoothAudioProvidersFactory::getProviderCapabilities_2_1(
		return Void();
		}

		Return<void> BluetoothAudioProvidersFactory::getProviderCapabilities_2_2(
		const V2_1::SessionType sessionType,
		getProviderCapabilities_2_2_cb _hidl_cb) {
		hidl_vec<V2_2::AudioCapabilities> audio_capabilities =
		hidl_vec<V2_2::AudioCapabilities>(0);
		if (sessionType == V2_1::SessionType::A2DP_HARDWARE_OFFLOAD_DATAPATH) {
		std::vector<CodecCapabilities> db_codec_capabilities =
		android::bluetooth::audio::GetOffloadCodecCapabilities(sessionType);
		if (db_codec_capabilities.size()) {
		audio_capabilities.resize(db_codec_capabilities.size());
		for (int i = 0; i < db_codec_capabilities.size(); ++i) {
		audio_capabilities[i].codecCapabilities(db_codec_capabilities[i]);
		}
		}
		} else if (sessionType == V2_1::SessionType::
		LE_AUDIO_HARDWARE_OFFLOAD_ENCODING_DATAPATH \|\|
		sessionType == V2_1::SessionType::
		LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH) {
		std::vector<LeAudioCodecCapabilitiesPair> db_codec_capabilities =
		android::bluetooth::audio::GetLeAudioOffloadCodecCapabilities(
		sessionType);
		if (db_codec_capabilities.size()) {
		audio_capabilities.resize(db_codec_capabilities.size());
		for (int i = 0; i < db_codec_capabilities.size(); ++i) {
		audio_capabilities[i].leAudioCapabilities(db_codec_capabilities[i]);
		}
		}
		} else if (sessionType != V2_1::SessionType::UNKNOWN) {
		std::vector<V2_1::PcmParameters> db_pcm_capabilities =
		android::bluetooth::audio::GetSoftwarePcmCapabilities_2_1();
		if (db_pcm_capabilities.size() == 1) {
		audio_capabilities.resize(1);
		audio_capabilities[0].pcmCapabilities(db_pcm_capabilities[0]);
		}
		}
		LOG(INFO) << __func__ << " - SessionType=" << toString(sessionType)
		<< " supports " << audio_capabilities.size() << " codecs";
		_hidl_cb(audio_capabilities);
		return Void();
		}

		IBluetoothAudioProvidersFactory* HIDL_FETCH_IBluetoothAudioProvidersFactory(
		const char* /* name */) {
		return new BluetoothAudioProvidersFactory();

bluetooth/audio/2.2/default/BluetoothAudioProvidersFactory.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,10 @@ class BluetoothAudioProvidersFactory : public IBluetoothAudioProvidersFactory {
		const V2_1::SessionType sessionType,
		getProviderCapabilities_2_1_cb _hidl_cb) override;

		Return<void> getProviderCapabilities_2_2(
		const V2_1::SessionType sessionType,
		getProviderCapabilities_2_2_cb _hidl_cb) override;

		private:
		static A2dpSoftwareAudioProvider a2dp_software_provider_instance_;
		static A2dpOffloadAudioProvider a2dp_offload_provider_instance_;

bluetooth/audio/2.2/types.hal

+42 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,8 @@ package android.hardware.bluetooth.audio@2.2;
		import @2.1::Lc3Parameters;
		import @2.1::PcmParameters;
		import @2.0::CodecConfiguration;
		import @2.0::CodecCapabilities;
		import @2.1::CodecType;

		enum LeAudioMode : uint8_t {
		UNKNOWN = 0x00,
		@@ -26,6 +28,12 @@ enum LeAudioMode : uint8_t {
		BROADCAST = 0x02,
		};

		enum AudioLocation : uint8_t {
		UNKNOWN = 0,
		FRONT_LEFT = 1,
		FRONT_RIGHT = 2,
		};

		struct UnicastStreamMap {
		/* The connection handle used for a unicast or a broadcast group. */
		uint16_t streamHandle;
		@@ -70,3 +78,37 @@ safe_union AudioConfiguration {
		CodecConfiguration codecConfig;
		LeAudioConfiguration leAudioConfig;
		};

		/** Used to specify the capabilities of the different session types */
		safe_union AudioCapabilities {
		PcmParameters pcmCapabilities;
		CodecCapabilities codecCapabilities;
		LeAudioCodecCapabilitiesPair leAudioCapabilities;
		};

		/**
		* Used to specify th le audio capabilities pair of the Hardware offload encode and decode.
		*/
		struct LeAudioCodecCapabilitiesPair{
		LeAudioMode mode;
		LeAudioCodecCapability encodeCapability;
		LeAudioCodecCapability decodeCapability;
		};

		/**
		* Used to specify the le audio capabilities of the codecs supported by Hardware offload
		* for encode or decode.
		*/
		struct LeAudioCodecCapability {
		CodecType codecType;
		AudioLocation supportedChannel;

		// The number of connected device
		uint8_t deviceCount;

		// Supported channel count for each device
		uint8_t channelCountPerDevice;

		// Should use safe union when there is more than one codec
		Lc3Parameters capabilities;
		};

bluetooth/audio/utils/session/BluetoothAudioSupportedCodecsDB_2_2.cpp

+104 −0

Original line number	Diff line number	Diff line
		@@ -24,9 +24,59 @@ namespace android {
		namespace bluetooth {
		namespace audio {

		using ::android::hardware::bluetooth::audio::V2_0::BitsPerSample;
		using ::android::hardware::bluetooth::audio::V2_1::CodecType;
		using ::android::hardware::bluetooth::audio::V2_1::Lc3FrameDuration;
		using ::android::hardware::bluetooth::audio::V2_1::Lc3Parameters;
		using ::android::hardware::bluetooth::audio::V2_1::SampleRate;
		using ::android::hardware::bluetooth::audio::V2_2::AudioLocation;
		using ::android::hardware::bluetooth::audio::V2_2::LeAudioCodecCapabilitiesPair;
		using ::android::hardware::bluetooth::audio::V2_2::LeAudioCodecCapability;
		using ::android::hardware::bluetooth::audio::V2_2::LeAudioMode;
		using SessionType_2_1 =
		::android::hardware::bluetooth::audio::V2_1::SessionType;

		// Stores the list of offload supported capability
		std::vector<LeAudioCodecCapabilitiesPair> kDefaultOffloadLeAudioCapabilities;

		static const LeAudioCodecCapability kInvalidLc3Capability = {
		.codecType = CodecType::UNKNOWN};

		// Default Supported Codecs
		// LC3 16_1: sample rate: 16 kHz, frame duration: 7.5 ms, octets per frame: 30
		static const Lc3Parameters kLc3Capability_16_1 = {
		.samplingFrequency = SampleRate::RATE_16000,
		.frameDuration = Lc3FrameDuration::DURATION_7500US,
		.octetsPerFrame = 30};

		// Default Supported Codecs
		// LC3 16_2: sample rate: 16 kHz, frame duration: 10 ms, octets per frame: 40
		static const Lc3Parameters kLc3Capability_16_2 = {
		.samplingFrequency = SampleRate::RATE_16000,
		.frameDuration = Lc3FrameDuration::DURATION_10000US,
		.octetsPerFrame = 40};

		// Default Supported Codecs
		// LC3 48_4: sample rate: 48 kHz, frame duration: 10 ms, octets per frame: 120
		static const Lc3Parameters kLc3Capability_48_4 = {
		.samplingFrequency = SampleRate::RATE_48000,
		.frameDuration = Lc3FrameDuration::DURATION_10000US,
		.octetsPerFrame = 120};

		static const std::vector<Lc3Parameters> supportedLc3CapabilityList = {
		kLc3Capability_48_4, kLc3Capability_16_2, kLc3Capability_16_1};

		static AudioLocation stereoAudio = static_cast<AudioLocation>(
		AudioLocation::FRONT_LEFT \| AudioLocation::FRONT_RIGHT);
		static AudioLocation monoAudio = AudioLocation::UNKNOWN;

		// Stores the supported setting of audio location, connected device, and the
		// channel count for each device
		std::vector<std::tuple<AudioLocation, uint8_t, uint8_t>>
		supportedDeviceSetting = {std::make_tuple(stereoAudio, 2, 1),
		std::make_tuple(monoAudio, 1, 2),
		std::make_tuple(monoAudio, 1, 1)};

		bool IsOffloadLeAudioConfigurationValid(
		const ::android::hardware::bluetooth::audio::V2_1::SessionType&
		session_type,
		@@ -44,6 +94,60 @@ bool IsOffloadLeAudioConfigurationValid(
		return true;
		}

		LeAudioCodecCapability composeLc3Capability(AudioLocation audioLocation,
		uint8_t deviceCnt,
		uint8_t channelCount,
		Lc3Parameters capability) {
		return LeAudioCodecCapability{.codecType = CodecType::LC3,
		.supportedChannel = audioLocation,
		.deviceCount = deviceCnt,
		.channelCountPerDevice = channelCount,
		.capabilities = capability};
		}

		std::vector<LeAudioCodecCapabilitiesPair> GetLeAudioOffloadCodecCapabilities(
		const SessionType_2_1& session_type) {
		if (session_type !=
		SessionType_2_1::LE_AUDIO_HARDWARE_OFFLOAD_ENCODING_DATAPATH &&
		session_type !=
		SessionType_2_1::LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH) {
		return std::vector<LeAudioCodecCapabilitiesPair>(0);
		}

		if (kDefaultOffloadLeAudioCapabilities.empty()) {
		for (auto [audioLocation, deviceCnt, channelCount] :
		supportedDeviceSetting) {
		for (auto capability : supportedLc3CapabilityList) {
		LeAudioCodecCapability lc3Capability = composeLc3Capability(
		audioLocation, deviceCnt, channelCount, capability);
		LeAudioCodecCapability lc3MonoCapability =
		composeLc3Capability(monoAudio, 1, 1, capability);

		// Adds the capability for encode only
		kDefaultOffloadLeAudioCapabilities.push_back(
		{.mode = LeAudioMode::UNICAST,
		.encodeCapability = lc3Capability,
		.decodeCapability = kInvalidLc3Capability});

		// Adds the capability for decode only
		kDefaultOffloadLeAudioCapabilities.push_back(
		{.mode = LeAudioMode::UNICAST,
		.encodeCapability = kInvalidLc3Capability,
		.decodeCapability = lc3Capability});

		// Adds the capability for the case that encode and decode exist at the
		// same time
		kDefaultOffloadLeAudioCapabilities.push_back(
		{.mode = LeAudioMode::UNICAST,
		.encodeCapability = lc3Capability,
		.decodeCapability = lc3MonoCapability});
		}
		}
		}

		return kDefaultOffloadLeAudioCapabilities;
		}

		} // namespace audio
		} // namespace bluetooth
		} // namespace android