[MPlayer-users] the new libmpeg2 wont run on sparc SIGBUS

[jb13 at gomerbud.com]

the new libmpeg2 wont run on sparc's, it dies with SIGBUS. i think has
something to do with unaligned memory access, sparc's are rather strict.

NetBSD noctum.gomerbud.com 2.0_BETA NetBSD 2.0_BETA (GENERIC) #0: Sun Aug  1 14:39:34 UTC 2004  autobuild at tgm.netbsd.org:/autobuild/netbsd-2-0/sparc/OBJ/autobuild/netbsd-2-0/src/sys/arch/sparc/compile/GENERIC sparc

hardware info ( if you care )
SUNW,SPARCstation-5
170MHz TurboSparc L1 32KB L2 512KB
96MB ram
TurboGX frame buffer
CS4231A audio chip

tried with gcc 2.95.3 and 3.3.3 backtrace from 2.95.3

$ gdb ./mplayer 
GNU gdb 5.3nb1
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GDB is free software, covered by the GNU General Public License, and you are
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Type "show copying" to see the conditions.
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This GDB was configured as "sparc--netbsdelf"...
(gdb) run /home/jb13/media/mov/random/ai_kato.mpg -vo sdl
Starting program: /usr/home/jb13/src/mplayer/mplayer /home/jb13/media/mov/random/ai_kato.mpg -vo sdl
MPlayer dev-CVS-040804-18:27-2.95.3 (C) 2000-2004 MPlayer Team

CPU: Sun Sparc
Reading config file /usr/local/etc/mplayer/mplayer.conf: No such file or directory
Reading config file /home/jb13/.mplayer/config
Reading /home/jb13/.mplayer/codecs.conf: Can't open '/home/jb13/.mplayer/codecs.conf': No such file or directory
Reading /usr/local/etc/mplayer/codecs.conf: Can't open '/usr/local/etc/mplayer/codecs.conf': No such file or directory
Using built-in default codecs.conf.
font: can't open file: /home/jb13/.mplayer/font/font.desc
font: can't open file: /usr/local/share/mplayer/font/font.desc
Using nanosleep() timing
Can't open input config file /home/jb13/.mplayer/input.conf: No such file or directory
Can't open input config file /usr/local/etc/mplayer/input.conf: No such file or directory
Falling back on default (hardcoded) input config

Playing /home/jb13/media/mov/random/ai_kato.mpg.
MPEG-PS file format detected.
VIDEO:  MPEG1  352x240  (aspect 2)  29.970 fps  1536.0 kbps (192.0 kbyte/s)
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
MP3lib: init layer2&3 finished, tables done
AUDIO: 44100 Hz, 2 ch, 16 bit (0x20), ratio: 32000->176400 (256.0 kbit)
Selected audio codec: [mp3] afm:mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
SDL: Using driver: x11
Xlib:  extension "XFree86-VidModeExtension" missing on display ":0.0".
vo: X11 running at 1152x900 with depth 8 and 8 bpp (":0.0" => local display)
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 352 x 240 (preferred csp: Mpeg PES)
Could not find matching colorspace - retrying with -vf scale...
Opening video filter: [scale]
The selected video_out device is incompatible with this codec.
VDecoder init failed :(
Opening video decoder: [libmpeg2] MPEG 1/2 Video decoder libmpeg2-v0.4.0b
Selected video codec: [mpeg12] vfm:libmpeg2 (MPEG 1 or 2 (libmpeg2))
==========================================================================
Checking audio filter chain for 44100Hz/2ch/16bit -> 44100Hz/2ch/16bit...
AF_pre: af format: 2 bps, 2 ch, 44100 hz, big endian signed int 
AF_pre: 44100Hz 2ch Signed 16-bit (Big-Endian)
AO: [sun] 44100Hz 2ch Signed 16-bit (Big-Endian) (2 bps)
Building audio filter chain for 44100Hz/2ch/16bit -> 44100Hz/2ch/16bit...
Starting playback...
VDec: vo config request - 352 x 240 (preferred csp: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.33:1 - prescaling to correct movie aspect.
VO: [sdl] 352x240 => 352x264 Planar YV12 

Program received signal SIGBUS, Bus error.
0x000aea10 in mpeg2_idct_copy_c (block=0x52710a, dest=0x705000 "", stride=352)
    at idct.c:76
76          if (likely (!(block[1] | ((int32_t *)block)[1] | ((int32_t *)block)[2] |
(gdb) bt
#0  0x000aea10 in mpeg2_idct_copy_c (block=0x52710a, dest=0x705000 "", 
    stride=352) at idct.c:76
#1  0x000bbfdc in mpeg2_slice (decoder=0x527040, code=0, 
    buffer=0xb00 <Error reading address 0xb00: Invalid argument>)
    at slice.c:954
#2  0x000abb00 in mpeg2_parse (mpeg2dec=0x527040) at decode.c:188
#3  0x000694b0 in decode (sh=0x26a100, data=0x521400, len=1, flags=0)
    at vd_libmpeg2.c:113
#4  0x00067674 in decode_video (sh_video=0x26a100, start=0x402000 "", 
    in_size=14145, drop_frame=0) at dec_video.c:309
#5  0x0002762c in main (argc=1993728, argv=0x18d070) at mplayer.c:2115
#6  0x00023454 in ___start ()