DSM-G600, DNS-3xx and NSA-220 Hack Forum

ridewithstyle wrote:

has anybody found a solution to get flac going so far? I haven't had much luck in one yet. All I get is gargling sound in amarok and silence in itunes so far. The tracks show, without tags though

I just arrived at a similar point. I was able to compile firefly with flac support,, and all tracks show including tags. However, when firefly starts transcoding, flac complains about an illegal instruction.

I was able to isolate the problem by transcoding from the command line (ron from the firefly forum pointed me to this):

/mnt/HD_a2/shared/Mp3test # flac --silent --decode --stdout frog.flac
Illegal instruction

I googled around and found that this usually happens when you run something on a CPU different than the one it was compiled/optimized for.

However, I don't know where to go from here. How can I get to more detailed information? I cross-compiled firefly using fonz's toolchain, so I'm not sure whether debugging symbols are of any help ... (i.e. I don't think I can debug on the DNS itself - right?)

I'm by no means a specialist in picking the right configuration flags, so it would be really awesome if anyone could give me feedback on my configuration ... for flac I used:

./configure 
--prefix=/opt/dns323/firefly/build/lnx_bin 
--host=arm-linux 
--with-ogg=/opt/dns323/firefly/build/lnx_bin 
LDFLAGS=-L/opt/dns323/firefly/build/lnx_bin/lib 
CPPFLAGS=-I/opt/dns323/firefly/build/lnx_bin/include 
CFLAGS=-Os -mtune=arm9e -march=armv5te

Firefly itself is compiled with Apskaft's configuration.
Thanks a lot!

Last edited by ischg (2007-07-11 18:42:56)

fonz wrote:

What happened to all the quotation marks and backslashes?

... they're there - I just manually split a single line into multiple lines (and forgot to put in the backslashes)

fonz wrote:

Try again without "-mtune=arm9e -march=armv5te" or try a more generic arch.

Tried that - to no avail.

fonz wrote:

PS: And it should probably be "CFLAGS" instead of "CPPFLAGS" (or at least a CFLAGS with the same content?)

I never know where to put what. Aren't CFLAGS compiler flags and CPPFLAGS the C/C++ preprocessor flags?

One thing that's different for compiling flac (I'm using flac-1.1.4) is that I have to give a different host type (arm-linux-uclibc won't work). I dug around some and found that there's obviously a different config.sub file that uses a changed naming convention. Do I have to use arm-uclinux now?

BTW: keep up the great work! Your fun_plug (and other hints) has worked really great so far!

I just downgraded flac to 1.1.2 - and it worked! Flac is decoding happily using about 6% of CPU.

Obviously there was some change in both 1.1.3 and 1.1.4 that I'm unable to figure out. At this point I'm happy that I can listen to flac that's transcoded by the NAS. I'll add some instructions to the wiki later on ...

What's left to do now is to figure out how to build ivorbis-tools - the vorbis-tools package runs too slow to decode ogg files in real-time.