doc/design.txt


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           bluez              headsetd              pulseaudio
             |                      |                       |
             |<---------------------|                       |
             |  RegisterProfile     |                       |
             |                      |<----------------------|
             |                      |   RegisterAgent       |
             |                      |                       |
             |                      |                       |
             |--------------------->|                       |
 bluetooth   |  NewConnection       |---------------------->|
 connection  |                      |    NewConnection      | Agent can choose to
             |                      |                       | manage rfcomm or not
             |                      |                       |
             |                      |                       | A new Headset Device h
             |                      |                       | is made
             |                      |                       |
             |                      |<----------------------| 
             |                      |  h.Connect            | On the new device, we
             |                      |                       | can get fd to read/write
             |                      |                       |
             |                      |                       |
             |                      |<----------------------|
             |                      |  h.Disconnect         |
             |                      |                       |
             |--------------------->|                       |
             | RequestDisconnection |                       |
             |                      |                       | Release all transport
             |                      |---------------------->|
             |                      | RequestDisconnection  |
             |                      |                       |
             |                      |                       |