[vorbis-dev] porting Ogg Vorbis to Symbian OS

[Alfred E.Heggestad]

Hi

I have tried with a more recent version of gcc

[alfredh at dingo _source]$ arm-epoc-pe-gcc -v
Reading specs from /usr/local/er6/lib/gcc-lib/arm-epoc-pe/2.9-psion-98r2/specs
gcc version 2.9-psion-98r2 (Symbian build 539)

but the same results. 

I think a problem might be the sample rate of the encoded
PCM which is 44100Hz on the .ogg file but my hardware
(Psion netBook) only supports 8000Hz alaw. Alaw is ok
because I have some PCM <--> alaw converters but
the PCM I get back from ov_read() must be 8000Hz - 
is there any way of specifying which sample rate I want
back ? Otherwise I guess I have to do 44.1kHz -> 8kHz
conversion after decoding...

The hardware I have is StrongArm (SA-1100) running
at 191MHz. I will probably run into some performance
issues later but first I just want to hear something that
sounds like music...:) my testing ogg is Pigs from Pink
Floyd's "Animals"

/alfred

On Wednesday 27 February 2002 09:12, Michael Smith wrote:
> >After the libraries were successfull compiled, I started
> >porting the ogg123 console app but gave up since it depends
> >on various things I dont have like libcurl and libpthreads.
> >So I took vorbisfile_example.c and wrote a simple player
> >with that. It runs on a Psion netBook but what I can hear
> >is not music - just some random repeated noise. I have tried
> >to experiment with word size (1 or 2), signed or unsigned
> >and endianess, but it does not make a difference.
>
> For testing, you're better off using decoder_example.c (it's
> simpler) - but that's unlikely to actually cause significant
> problems here.
>
> >The compiler I use is gcc cross compiling for ARM,
> >
> >[alfredh at dingo er5cpp]$ arm-pe-gcc -v
> >gcc driver version cygnus-2.7.2-960323 (Psion GCC tools v113 05/03/1997)
> >executing gcc version cygnus-2.7.2-960323
>
> We've hit a LOT of bugs with older versions of gcc in developing vorbis
> (and in other compilers) - this is almost certainly the problem. Building
> a cross-compiler is never all that much fun, but it shouldn't be too
> hard. If it happens with a modern version (3.0.x preferred, but if you
> have a reason to use something a bit older that should be ok - 2.95.2
> works ok for vorbis on most platforms.)
>
> If it still happens there, please do get back to us.
>
> There's a good chance you'll hit problems later on, trying to decode
> in real time (depending on how slow the chip is), but that can be
> considered later on...
>
> Michael
>
>
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