[FFmpeg-devel] Issue with ffmpeg mp3 decoder on ARM11

[galahad at gmail.com]

i am using an arm11. if mixing fp is ok, what might be the prob? i am
trying to analyse whats happening after compiling ffmpeg with the
debug flag, but i Havent got anywhere till now.


On 7/17/07, M?ns Rullg?rd <mans at mansr.com> wrote:
> Alexy <galahad at gmail.com> writes:
>
> > Hello,
> >
> >  Thank you for the help. I checked the file you mentioned,
> > ALT_BITSTREAM_READER was already enabled (maybe because i had tried
> building
> > ffmpeg with arch=<blank> )
> >
> > Some more things i could find out.
> >
> > 1) The input to the MP3 decoder is matching on arm and on linux.
> >
> > 2) I am using the gcc 3.3.2 compiler, but the libs on the filesystems are
> > built using 3.4.4. When i configure ffmpeg with the 3.4.4 libs,
> > config.errtalks about the libraries using hardware fp. As far as i
> > could know ARM does
> > not have hardware fp. Could this be a problem? Detailed log is given
> below.
>
> There are actually two FP architectures for ARM, FPA (old) and VFP
> (new), zero or one of which may be available in a specific
> implementation.  It is OK to mix hardware and software implementations
> of the same architecture in a build.  You didn't mention which ARM
> chip you're using, so I can't say what's available on yours.  What's
> in your /proc/cpuinfo?
>
> > 3) decoding of H.263 is happening fine on ARM with the same library
>
> H.263 decoding doesn't use floating point, so this working doesn't
> contradict the theory that mismatched FP is behind the problem.
>
> --
> M?ns Rullg?rd
> mans at mansr.com
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