On Sat, Feb 18, 2012 at 09:46:56PM +0100, Julian Sikorski wrote: > Dear fellow Fedora packagers > > I was trying to get MAME [1] to use system libjpeg [2]. The problem is > that MAME needs jpeg_mem_src, which is only defined if libjpeg-turbo > compiled with --with-jpeg8 switch, which is not the case for the Fedora > package. > Would such change be feasible to introduce? If not, I assume that I have > no other choice as to use the bundled copy (not really relevant here > since MAME is an RPM Fusion package). You can specify your own data sources with the libjpeg shipped with fedora (jped_decompress_struct::src). What is missing is a default implementation for a source reading from memory. libjpeg8 ships one by default, but older libjpeg don't have it. However, the mem source should only be a few functions, so you can probably only bundle a copy of jpeg_mem_src in your package and use the system libjpeg. I did something very similar in spice, but it was for jpeg_mem_dest, not jpeg_mem_src (ie similar functionality, but for compression instead of decompression), see http://cgit.freedesktop.org/spice/spice/tree/server/mjpeg_encoder.c#n95 Hope that helps, Christophe
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