[Ffmpeg-devel] how about using posix_memalign?

[D Richard Felker III]

On Mon, Apr 11, 2005 at 04:46:53PM +0200, M?ns Rullg?rd wrote:
> "Ronald S. Bultje" <rbultje at ronald.bitfreak.net> writes:
> 
> > Hi,
> >
> > On Mon, 11 Apr 2005, Wolfram Gloger wrote:
> >> > Free() on memalign'ed memory gives problems at least on Linux, see the
> >> > GNOME bugzilla report in my original email.
> >>
> >> That was with valgrind only, AFAICS.  free() on memalign()ed memory
> >> works just fine on Linux, at least since 1995 and probably even
> >> before.
> >
> > That's fine, since I use valgrind a lot (for me, it's a cheap and
> > acceptable memory/call profiler and memory debugger). Anyway, I don't care
> > enough; disregard the patch if you don't care about this.
> >
> > The automatic next step is that ffmpeg has never been valgrinded; that
> > worries me a bit.
> 
> $ valgrind ffmpeg -i foo.mpg -vcodec rawvideo -f rawvideo -y /dev/null
> ==23199== Memcheck, a memory error detector for x86-linux.
> ==23199== Copyright (C) 2002-2004, and GNU GPL'd, by Julian Seward et al.
> ==23199== Using valgrind-2.2.0, a program supervision framework for x86-linux.
> ==23199== Copyright (C) 2000-2004, and GNU GPL'd, by Julian Seward et al.
> ==23199== For more details, rerun with: -v
> ==23199== 
> ffmpeg version 0.4.9-pre1, build 4752, Copyright (c) 2000-2004 Fabrice Bellard
>   configuration:  --prefix=/home/mru/opt/ffmpeg/default --tune=pentium4 --disable-strip --enable-shared --enable-gpl --enable-mp3lame --enable-faad --enable-faac --enable-a52 --enable-dts --enable-vorbis --enable-ogg --enable-x264 
>   built on Apr  7 2005 17:10:38, gcc: 3.3.5  (Gentoo Linux 3.3.5-r1, ssp-3.3.2-3, pie-8.7.7.1)
> Input #0, mpeg, from 'foo.mpg':
>   Duration: 00:04:22.7, start: 5228.128811, bitrate: 5153 kb/s
>   Stream #0.0: Video: mpeg2video, 704x480, 29.97 fps, 4750 kb/s
>   Stream #0.1: Audio: mp2, 48000 Hz, stereo, 384 kb/s
> Output #0, rawvideo, to '/dev/null':
>   Stream #0.0: Video: rawvideo, yuv420p, 704x480, 29.97 fps, q=2-31, 200 kb/s
> Stream mapping:
>   Stream #0.0 -> #0.0
> Press [q] to stop encoding
> frame=  118 q=0.0 Lsize=   58410kB time=3.9 bitrate=121529.7kbits/s    s/s    
> video:50985kB audio:0kB global headers:0kB muxing overhead 14.563107%
> ==23199== 
> ==23199== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 35 from 1)
> ==23199== malloc/free: in use at exit: 0 bytes in 0 blocks.
> ==23199== malloc/free: 917 allocs, 917 frees, 67162204 bytes allocated.
> ==23199== For a detailed leak analysis,  rerun with: --leak-check=yes
> ==23199== For counts of detected errors, rerun with: -v
> 
> Happy now?

I get the feeling we might have encountered a classic troll here... :(

Rich