[Bluez-users] Sbc encode optimization

[Bluez-users] Sbc encode optimization

[salyer]

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Dear sir ,
I see "There are a couple of optimizations the codec could see but it
performs reasonably on 200MHz+ devices. " on the wiki.bluez.org site.
Would you tell me how to optimise the sbc encode for arm926ejs? Thanks.



Best Regards & Thanks
Paul Zhu.
-- 
Best Regards!

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[Bluez-devel] adding PDU and debbugging sdp daemon

[Carlo Giuseppe Monaco]

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Dear Sir,

I'm modifying bluez-libs and bluez-utils (i'm using
3.9 version) to introduce new pdu relating to registration, request and
response of new services.
For example  i'm adding new pdu types, defining them into  bluez-libs-3.9/include/sdp.h 

# define SDP_NEW_REGISTER_REQ 0x85

But
during debugging I returned errno = EINVAL (in function process_request
written in bluez_utils_3.9/sdpd/request.c )and the sdp daemon log file 
gets the following result: 

Jun 25 21:26:31 pinta-desktop hcid[4967]: Unknown PDU ID : 0x85 received
 
How can i accept new types of pdu declared?
Is
there a way to debug sdp daemon alternative to log file, for example
using gdb o using particular options in ./configure command? I tried
using --enable-debug option for configure and launching gdb, but they
don't work.


Thanks for your support and sorry for my english.

Best Regards,
Carlo M.


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[Bluez-devel] adding PDU and debbugging sdp daemon

[Carlo Giuseppe Monaco]

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Dear Sir,

I'm modifying bluez-libs and bluez-utils (i'm using
3.9 version) to introduce new pdu relating to registration, request and
response of new services.
For example  i'm adding new pdu types, defining them into  bluez-libs-3.9/include/sdp.h 

# define SDP_NEW_REGISTER_REQ 0x85

But
during debugging I returned errno = EINVAL (set by sdp_device_record_register_binary written in sdp.c ) and the sdp daemon log file 
gets the following result: 

Jun 25 21:26:31 pinta-desktop hcid[4967]: Unknown PDU ID : 0x85 received 
(i thintk it's a message sent from function process_request
written in bluez_utils_3.9/sdpd/request.c )
 
How can i accept new types of pdu declared?
Is
there a way to debug sdp daemon alternative to log file, for example
using gdb o using particular options in ./configure command? I tried
using --enable-debug option for configure and launching gdb, but they
don't work.


Thanks for your support and sorry for my english.

Best Regards,
Carlo M. 

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Re: [Bluez-users] Sbc encode optimization

[Brad Midgley]

Paul

> I see "There are a couple of optimizations the codec could see but it
> performs reasonably on 200MHz+ devices. " on the wiki.bluez.org site.
> Would you tell me how to optimise the sbc encode for arm926ejs? Thanks.

The input data is copied a couple of times inside the encoder. It
would be faster if it was not being copied.

There are places, like the precomputed tables, that could be
represented in 16 bits. There was no advantage to doing this on the TI
arm chip but it might be a different result for other chips.

-- 
Brad

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