Re: [Bluez-devel] How to use sbc.c ?

[Frank Heimbaecher <frank.heimbaecher@jambit.com>]

Hello

I found out that sbc.c, as it is, works for big endian. On little endian
machines you cannot recognize an audio file after encoding and decoding.
So I changed the code a bit:

sbc_decode():
// fh 20.12.06: original source code assumes big endian
// so we have to change the order of the following 2 statements
*ptr++ = (s & 0x00ff);
*ptr++ = (s & 0xff00) >> 8;

sbc_encode():
// fh 20.12.06: original source code assumes big endian
// so we have to exchange [0] and [1] here
int16_t s = (ptr[1] & 0xff) << 8 | (ptr[0] & 0xff);

Would it be a suggestion to work with a macro LITTLE_ENDIAN here?

And very interesting for me: Are there other places in the code that
need to be adapted to little endian? Because the result after decoding
is still poor: volume is too low, speed is too high (probably data
missing) and sound is quite shallow. When I write the resulting data to
a file, it is smaller than the original.

Thanks for help
Frank

-- 
Dipl.-Inform. Frank Heimbaecher, Senior Software Architect

jambit Software Development & Management GmbH
Nymphenburger Strasse 13-15, D-80335 Muenchen

http://www.jambit.com    where innovation works

Tel.: +49.89.45 2347-42
Fax:  +49.89.45 2347-70


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