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https://git.kernel.org/pub/scm/bluetooth/bluez.git
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88 lines
2.8 KiB
Plaintext
88 lines
2.8 KiB
Plaintext
Bluetooth Audio Plugin
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======================
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The audio plugin happen to be in a different socket but all the rules for
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HAL socket apply here as well, the abstract socket name is
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"\0bluez_audio_socket" (tentative):
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.---Audio---. .--Android--.
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| Plugin | | Daemon |
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| | Command | |
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| | --------------------------> | |
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| | | |
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| | <-------------------------- | |
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| | Response | |
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'-----------' '-----------'
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Audio HAL Daemon
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----------------------------------------------------
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call dev->open() --> command 0x01
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return dev->open() <-- response 0x01
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call dev->open_output_stream() --> command 0x03
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return dev->open_output_stream() <-- response 0x03
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call stream->write() --> command 0x05
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return stream->write() <-- response 0x05
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call stream->common.standby() --> command 0x06
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return stream->common.standby() <-- response 0x06
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call dev->close_output_stream() --> command 0x04
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return dev->close_output_stream() <-- response 0x04
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call dev->close() --> command 0x02
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return dev->close() <-- response 0x02
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Audio Service (ID 0)
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====================
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Opcode 0x00 - Error response
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Response parameters: Status (1 octet)
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Opcode 0x01 - Open Audio Endpoint commmand
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Command parameters: Service UUID (16 octets)
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Codec ID (1 octet)
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Number of codec presets (1 octet)
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Codec capabilities length (1 octet)
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Codec capabilities (variable)
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Codec preset # length (1 octet)
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Codec preset # configuration (variable)
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...
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Response parameters: Endpoint ID (1 octet)
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Opcode 0x02 - Close Audio Endpoint command
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Command parameters: Endpoint ID (1 octet)
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Response parameters: <none>
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Opcode 0x03 - Open Stream command
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Command parameters: Endpoint ID (1 octet)
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Response parameters: Outgoing MTU (2 octets)
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Codec configuration length (1 octet)
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Codec configuration (1 octet)
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File descriptor (inline)
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Opcode 0x04 - Close Stream command
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Command parameters: Endpoint ID (1 octet)
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Response parameters: <none>
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Opcode 0x05 - Resume Stream command
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Command parameters: Endpoint ID (1 octet)
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Response parameters: <none>
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Opcode 0x06 - Suspend Stream command
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Command parameters: Endpoint ID (1 octet)
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Response parameters: <none>
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