[MPlayer-dev-eng] mp3 decoding performance on ARM (was: mplayer libtremor patch)

[Diego Biurrun]

On Mon, Aug 14, 2006 at 12:29:44AM +0200, Michael Niedermayer wrote:
> 
> On Mon, Aug 14, 2006 at 12:43:03AM +0300, Siarhei Siamashka wrote:
> > On Sunday 13 August 2006 22:44, Diego Biurrun wrote:
> > 
> > > Have you tried ffmp3?  The MP3 decoder in FFmpeg is integer-only.  I'd
> > > be interested to know how it performs compared to libmad.
> > 
> > Nokia 770, ARM926EJS 250MHz cpu
> > 
> > 128kbit constant bitrate soundtrack, length 6:13
> > MPlayer 1.0pre8, libmad 0.15.1b
> > 
> > time ./mplayer -quiet -ac mad -ao pcm:fast:file=/dev/null -vo null -vc null 
> > test.mp3
> > ...
> > real    0m 46.92s
> > user    0m 46.22s
> > sys     0m 0.50s
> > 
> > time ./mplayer -quiet -ac ffmp3 -ao pcm:fast:file=/dev/null -vo null -vc null 
> > test.mp3
> > ...
> > real    1m 27.84s
> > user    1m 26.91s
> > sys     0m 0.64s
> 
> please retry this with CONFIG_MPEGAUDIO_HP disabled, and dont forget 
> make distclean, also ensure that the decoder uses integers for the antialias
> filter, theres also a float version of that ...

For your convenience I've just added a --disable-libavcodec_mpegaudio_hp
switch to configure.  Benchmarks would be appreciated.

Diego