Hi Carl,
Yep, finally I managed to recreate this exact same problem with debug setting and no MMX, so it's not just the MMX stuff I think. Crashed in exactly the same place as for you, but on mine the stack seemed to be corrupted. I have trimmed the BT back to the essentials below in case anyone else wants to peer in and try to see why it's dying. Looks basically though like "x" is a bit messed up and causing the problem because later it's used as a memory offset....
In my case it was running absolutely fine non-full screen, and then I just said "how strange it didn't want to crash under the debugger", switched it into full screen and less than a sec later it died.
..Hmm, looking at the code a bit longer. Going back to filters.c:434 it looks like "py" goes negative, which means that "(py >> PERTEDEC)" is unlikely to be what was expected...
I'm trying this quick hack to see if it helps:
I've seen this one for quite a while too - it makes goom pretty useless. but I can get it to segfault with debug symbols. It seems to segfault quicker for me if goom is in full screen mode. I have MMX disabled across the board in MythMusic since it doesn't like to compile on AMD64s. If it matters, I see this when I am playing flac files from a R/O SMB mount. backtrace from 2/19 CVS build below message body.
Thread 1 (process 22460):
#0 0x0000002a9d30068e in getPixelRGB_ (buffer=0x227da00, x=4294967192,
c=0x7fbfffc2b0) at goom/filters.c:391
tmp8 = (
unsigned char *) 0x40227d860 <Address 0x40227d860 out of bounds>
#1 0x0000002a9d3008c1 in c_zoom (expix1=0x227da00, expix2=0x2273400,
prevX=108, prevY=98, brutS=0x2288000, brutD=0x229cc80)
at goom/filters.c:434
col1 = {r = 169, v = 169, b = 43}
col4 = {r = 174, v = 173, b = 41}
c3 = 0
pos = -104
brutSmypos = 120
col2 = {r = 171, v = 171, b = 38}
c1 = 255
c4 = 0
px = 79
col3 = {r = 172, v = 171, b = 45}
c2 = 0
py = -1
coeffs = -535949824
myPos = 4
myPos2 = 5
couleur = {r = 168, v = 168, b = 42}
ax = 1712
ay = 1552
bufsize = 21168
bufwidth = 108
#2 0x0000002a9d301598 in zoomFilterFastRGB (pix1=0x227da00, pix2=0x2273400,
zf=0x0, resx=108, resy=98, switchIncr=0, switchMult=0.966666639)
at goom/filters.c:712
x = 1174163456
y = 2683611791
reverse = 0 '\0'
pertedec = 8 '\b'
firstTime = 0 '\0'
interlace_start = -2
#3 0x0000002a9d303aa6 in goom_update (data=0x7fbfffc550, forceMode=0)
at goom/goom_core.c:645
lockvar = 29
goomvar = 11
totalgoom = 5
agoom = 17
abiggoom = 0
loopvar = 7074
speedvar = 17
lineMode = 0
nombreCDDC = 71
return_val = (unsigned int *) 0x2273400
pointWidth = 43
pointHeight = 39
incvar = 12147
accelvar = 10
i = 3
largfactor = 0.445293337
stop_lines = 0
ifs_incr = 0
decay_ifs = -829
recay_ifs = 0
switchMult = 0.966666639
switchIncr = 0
goomlimit = 19 '\023'
zfd = {vitesse = 124, pertedec = 8 '\b', sqrtperte = 16 '\020',
middleX = 54, middleY = 49, reverse = 0 '\0', mode = 7 '\a',
hPlaneEffect = -4, vPlaneEffect = -4, waveEffect = 0, hypercosEffect = 0,
noisify = 0 '\0'}
pzfd = (ZoomFilterData *) 0x0
#4 0x0000002a9d30b070 in Goom::process(VisualNode*) (this=0x21fe990,
node=0x22e1010) at goom/mythgoom.cpp:102
numSamps = 512
data = {{-3200, -2833, -2470, -2053, -1526, -920, -331, 210, 699,
1155, 1637, 2134, 2608, 3008, 3390, 3753, 4153, 4559, 4838, 4987, 5111,
5235, 5276, 5280, 5295, 5239, 5116, 4974, 4875, 4805, 4804, 4863, 4952,
4993, 4912, 4678, 4276, 3814, 3373, 2958, 2495, 1909, 1193, 315, -637,
-1691, -2858, -4063, -5256, -6371, -7332, -8231, -9102, -9869, -10578,
-11226, -11705, -12053, -12281, -12422, -12471, -12517, -12635, -12780,
-12982, -13108, -13065, -12867, -12422, -11745, -10927, -10057, -9258,
-8509, -7833, -7144, -6402, -5614, -4893, -4353, -4008, -3723, -3447,
-3229, -3040, -2832, -2604, -2337, -1978, -1551, -1084, -581, -60, 403,
817, 1223, 1642, 2099, 2466, 2720, 2837, 2823, 2751, 2709, 2803, 3054,
3501, 4050, 4537, 4921, 5229, 5493, 5759, 5959, 6021, 5892, 5514, 4931,
4164, 3304, 2346, 1270, 53, -1165, -2205, -2985, -3571, -4019, -4502,
-5080, -5602, -6040, -6323, -6349, -6269, -6151, -6029, -5783, -5469,
-5183, -4918, -4644, -4259, -3695, -2932, -1972, -831, 528, 2052, 3566,
4922, 6054, 6969, 7737, 8410, 9046, 9675, 10329, 10942, 11432, 11819,
12057, 12147, 12059, 11795, 11374, 10901, 10445, 10012, 9581, 9237, 8963,
8658, 8276, 7903, 7634, 7372, 6979, 6443, 5847, 5271, 4736, 4287, 3999,
3789, 3651, 3553, 3398, 3132, 2752, 2312, 1833, 1290, 713, 85, -544,
-1133, -1667, -2076, -2231...}, {-3802, -3450, -3110, -2717, -2182, -1570,
-965, -398, 138, 622, 1143, 1690, 2231, 2704, 3150, 3594, 4064, 4554,
4912, 5123, 5307, 5473, 5547, 5592, 5633, 5592, 5483, 5364, 5279, 5214,
5225, 5300, 5400, 5468, 5385, 5173, 4784, 4329, 3906, 3492, 3017, 2410,
1651, 718, -315, -1451, -2723, -4038, -5360, -6612, -7705, -8745, -9763,
-10679, -11558, -12368, -13017, -13518, -13921, -14213, -14401, -14568,
-14805, -15069, -15379, -15600, -15647, -15523, -15141, -14506, -13722,
-12877, -12080, -11318, -10618, -9899, -9091, -8222, -7421, -6784, -6338,
-5951, -5574, -5262, -4984, -4691, -4387, -4048, -3618, -3131, -2603,
-2031, -1443, -902, -406, 81, 598, 1160, 1631, 2007, 2230, 2321, 2360,
2395, 2585, 2921, 3462, 4100, 4681, 5165, 5567, 5935, 6310, 6613, 6780,
6739, 6443, 5922, 5188, 4348, 3394, 2286, 1026, -269, -1409, -2301, -2987,
-3544, -4134, -4823, -5436, -5966, -6334, -6443, -6424, -6378, -6298,
-6099, -5822, -5568, -5314, -5051, -4680, -4119, -3334, -2346, -1168, 246,
1848, 3445, 4904, 6151, 7191, 8068, 8864, 9615, 10376, 11160, 11910,
12544, 13071, 13457, 13679, 13714, 13575, 13261, 12858, 12477, 12089,
11681, 11357, 11089, 10782, 10381, 10022, 9750, 9486, 9088, 8546, 7938,
7337, 6777, 6292, 5956, 5707, 5508, 5359, 5120, 4779, 4323, 3794, 3235,
2589, 1917, 1194, 460, -239, -875, -1389, -1644...}}
i = 512
#5 0x0000002a9d29a778 in MainVisual::timeout() (this=0x1d52710)
at mainvisual.cpp:256
process = true
node = (VisualNode *) 0x22e1010
stop = true
#6 0x0000002a9d329946 in MainVisual::qt_invoke(int, QUObject*) (
this=0x1d52710, _id=45, _o=0x7fbfffd040) at moc_mainvisual.cpp:94
No locals.
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