Add Hardware Offloaded provider parameters for LC3 am: e5611aa5c6 (3d79c11c) · Commits · e / os / android_hardware_interfaces

bluetooth/audio/2.1/types.hal

+57 −9

Original line number	Diff line number	Diff line
		@@ -16,13 +16,14 @@

		package android.hardware.bluetooth.audio@2.1;

		import @2.0::PcmParameters;
		import @2.0::SessionType;
		import @2.0::SampleRate;
		import @2.0::ChannelMode;
		import @2.0::BitsPerSample;
		import @2.0::CodecConfiguration;
		import @2.0::ChannelMode;
		import @2.0::CodecCapabilities;
		import @2.0::CodecConfiguration;
		import @2.0::CodecType;
		import @2.0::PcmParameters;
		import @2.0::SampleRate;
		import @2.0::SessionType;

		enum SessionType : @2.0::SessionType {
		/** Used when encoded by Bluetooth Stack and streaming to LE Audio device */
		@@ -35,6 +36,10 @@ enum SessionType : @2.0::SessionType {
		LE_AUDIO_HARDWARE_OFFLOAD_DECODING_DATAPATH,
		};

		enum CodecType : @2.0::CodecType {
		LC3 = 0x20,
		};

		enum SampleRate : @2.0::SampleRate {
		RATE_8000 = 0x100,
		RATE_32000 = 0x200,
		@@ -49,14 +54,57 @@ struct PcmParameters {
		uint32_t dataIntervalUs;
		};

		/** Used to configure either a Hardware or Software Encoding session based on session type */
		safe_union AudioConfiguration {
		PcmParameters pcmConfig;
		CodecConfiguration codecConfig;
		enum Lc3FrameDuration : uint8_t {
		DURATION_10000US = 0x00,
		DURATION_7500US = 0x01,
		};

		/**
		* Used for Hardware Encoding/Decoding LC3 codec parameters.
		*/
		struct Lc3Parameters {
		/* PCM is Input for encoder, Output for decoder */
		BitsPerSample pcmBitDepth;

		/* codec-specific parameters */
		SampleRate samplingFrequency;
		Lc3FrameDuration frameDuration;
		/* length in octets of a codec frame */
		uint32_t octetsPerFrame;
		/* Number of blocks of codec frames per single SDU (Service Data Unit) */
		uint8_t blocksPerSdu;
		};

		/**
		* Used to specify the capabilities of the LC3 codecs supported by Hardware Encoding.
		*/
		struct Lc3CodecCapabilities {
		/* This is bitfield, if bit N is set, HW Offloader supports N+1 channels at the same time.
		* Example: 0x27 = 0b00100111: One, two, three or six channels supported.*/
		uint8_t supportedChannelCounts;
		Lc3Parameters lc3Capabilities;
		};

		/** Used to specify the capabilities of the different session types */
		safe_union AudioCapabilities {
		PcmParameters pcmCapabilities;
		CodecCapabilities codecCapabilities;
		Lc3CodecCapabilities leAudioCapabilities;
		};

		/**
		* Used to configure a LC3 Hardware Encoding session.
		*/
		struct Lc3CodecConfiguration {
		/* This is also bitfield, specifying how the channels are ordered in the outgoing media packet.
		* Bit meaning is defined in Bluetooth Assigned Numbers. */
		uint32_t audioChannelAllocation;
		Lc3Parameters lc3Config;
		};

		/** Used to configure either a Hardware or Software Encoding session based on session type */
		safe_union AudioConfiguration {
		PcmParameters pcmConfig;
		CodecConfiguration codecConfig;
		Lc3CodecConfiguration leAudioCodecConfig;
		};
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