Attribute server database will contain functions to manage attributes,
allowing any plugin to add, remove or change attributes. Advertising
data shall be also generated based on exported services/attributes.
Contains device driver declaration for attribute protocol. Registers
D-Bus path/interface to represent the remote device client: BR/EDR or
LE. For the most common LE scenarios, devices running BlueZ will be
client role.
This plugin will have the implementation of a Generic Attribute
Protocol server over Bluetooth Basic Rate and BLE. For BR/EDR this
plugin will register the service record. GATT database will be located
in the BlueZ "core", this plugin will contain only calls to add and
change attributes.
Adds a plugin for listening to the MCE (Mode Control Entity)
radio state signal. Implemented in a new source file,
configuration flag for enabling it added to the build files.
The plugin registers an adapter driver containing a DBus signal
watch for receiving MCE_RADIO_STATES_SIG messages. On receiving
the signal, it sets the powered state of the adapter according
to the Bluetooth field.
The optimized filter gets enabled when the code is compiled
with -mcpu=/-march options set to target the processors which
support ARMv6 instructions. This code is also disabled when
NEON is used (which is a lot better alternative). For additional
safety ARM EABI is required and thumb mode should not be used.
Benchmarks from ARM11:
== 8 subbands ==
$ time ./sbcenc -b53 -s8 -j test.au > /dev/null
real 0m 35.65s
user 0m 34.17s
sys 0m 1.28s
$ time ./sbcenc.armv6 -b53 -s8 -j test.au > /dev/null
real 0m 17.29s
user 0m 15.47s
sys 0m 0.67s
== 4 subbands ==
$ time ./sbcenc -b53 -s4 -j test.au > /dev/null
real 0m 25.28s
user 0m 23.76s
sys 0m 1.32s
$ time ./sbcenc.armv6 -b53 -s4 -j test.au > /dev/null
real 0m 18.64s
user 0m 15.78s
sys 0m 2.22s
Explicitely link against libm, to avoid linking problems:
CCLD sbc/sbctester
/usr/bin/ld: sbc/sbctester.o: undefined reference to symbol 'sqrt@@GLIBC_2.2.5'
/usr/bin/ld: note: 'sqrt@@GLIBC_2.2.5' is defined in DSO /lib64/libm.so.6 so try adding it to the linker command line
/lib64/libm.so.6: could not read symbols: Invalid operation
The following patch against the 4.54 codebase drops posix capabilities
after startup so that the bluetooth daemon is less of a threat to the
system should there be any way to compromise it. The retained
capabilities was compared to selinux policy to make sure that its
roughly the same. It uses the libcap-ng library which allows patches
for dropping capabilities to be much smaller.
