blob: f4a497dd8d5b78b7a94d32616c88f0246cf0edde (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
Bluetooth Audio Plugin
======================
The audio plugin happen to be in a different socket but all the rules for
HAL socket apply here as well, the abstract socket name is
"\0bluez_audio_socket" (tentative):
.---Audio---. .--Android--.
| Plugin | | Daemon |
| | Command | |
| | --------------------------> | |
| | | |
| | <-------------------------- | |
| | Response | |
| | | |
| | | |
| | | |
'-----------' '-----------'
Audio HAL Daemon
----------------------------------------------------
call dev->open() --> command 0x01
return dev->open() <-- response 0x01
call dev->open_output_stream() --> command 0x03
return dev->open_output_stream() <-- response 0x03
call stream->write() --> command 0x05
return stream->write() <-- response 0x05
call stream->common.standby() --> command 0x06
return stream->common.standby() <-- response 0x06
call dev->close_output_stream() --> command 0x04
return dev->close_output_stream() <-- response 0x04
call dev->close() --> command 0x02
return dev->close() <-- response 0x02
Audio Service (ID 0)
====================
Opcode 0x00 - Error response
Response parameters: Status (1 octet)
Opcode 0x01 - Open Audio Endpoint commmand
Command parameters: Service UUID (16 octets)
Codec ID (1 octet)
Number of codec presets (1 octet)
Codec capabilities length (1 octet)
Codec capabilities (variable)
Codec preset # length (1 octet)
Codec preset # configuration (variable)
...
Response parameters: Endpoint ID (1 octet)
Opcode 0x02 - Close Audio Endpoint command
Command parameters: Endpoint ID (1 octet)
Response parameters: <none>
Opcode 0x03 - Open Stream command
Command parameters: Endpoint ID (1 octet)
Response parameters: Outgoing MTU (2 octets)
Codec configuration length (1 octet)
Codec configuration (1 octet)
File descriptor (inline)
Opcode 0x04 - Close Stream command
Command parameters: Endpoint ID (1 octet)
Response parameters: <none>
Opcode 0x05 - Resume Stream command
Command parameters: Endpoint ID (1 octet)
Response parameters: <none>
Opcode 0x06 - Suspend Stream command
Command parameters: Endpoint ID (1 octet)
Response parameters: <none>
|
