[MPlayer-dev-eng] [PATCH] ARM extended instructions support detection in configure script

[Siarhei Siamashka]

Hello All,

Here is a patch which adds detection (or allows manual configuration) for
instructions that are supported by newer ARM processors.

I only could test armv5te enhanced DSP instructions support, as my cpu does
not support Intel XScale IWMMX SIMD instructions. But everything should work
pretty much in the same way as armv5te detection. 

This patch only enables capabilities which are already supported by ffmpeg, so
if ffmpeg is ok, mplayer should be fine as well.

I also hope to get some of the code accepted upstream so that there will be
less things to patch for https://garage.maemo.org/projects/mplayer/

The next thing that would be nice to have if supported upstream is detection
of availability of maemo (Nokia 770 development platform) libraries from
configure script. These libraries are needed to disable screen blanking on
Nokia 770 while playing video (LCD backlight is turned off after a few minutes
of inactivity and it is very annoying), this functionality is very similar to
screensaver disabling option for x11 in mplayer.

PS. According to https://garage.maemo.org stats,  MPlayer is one of the most
actively downloaded and used applications for Nokia 770, also there is lots 
of positive feedback as only MPlayer is currently able to play 320x240 or
400x224 30fps ~400kbps mpeg4 video without dropping frames on this device
(built-in player can only handle half framerate without visible framedrops for
such resolution/bitrate at the moment).
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