[Ffmpeg-cvslog] r7538 - trunk/libavcodec/mpeg12.c

Diego Biurrun diego
Thu Jan 25 13:26:24 CET 2007


On Thu, Jan 18, 2007 at 11:02:11AM +0100, Luca Barbato wrote:
> Diego Biurrun wrote:
> >On Tue, Jan 16, 2007 at 08:53:40AM +0100, Diego Biurrun wrote:
> >>On Tue, Jan 16, 2007 at 12:26:10AM +0100, michael wrote:
> >>>Log:
> >>>fix segfault with http://sam.zoy.org/zzuf/lol-ffplay.mpg and 
> >>>http://sam.zoy.org/zzuf/lol-ffplay.m2v
> >>lol-ffplay.m2v still crashes on my PPC.  I'll try to send a backtrace
> >>later today.
> 
> A saner backtrace:
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x0fcd8f08 in _wordcopy_fwd_aligned () from /lib/libc.so.6
> (gdb) bt
> #0  0x0fcd8f08 in _wordcopy_fwd_aligned () from /lib/libc.so.6
> #1  0x0fcd8e50 in memcpy () from /lib/libc.so.6
> #2  0x101673e0 in img_copy (dst=0x31905bd8, src=0x31905bb8,
>     pix_fmt=<value optimized out>, width=704, height=4580) at 
> imgconvert.c:737
> #3  0x101b9e88 in sws_scale (ctx=0x10433c20, src=<value optimized out>,
>     srcStride=<value optimized out>, srcSliceY=<value optimized out>,
>     srcSliceH=<value optimized out>, dst=0x2c0,
>     dstStride=<value optimized out>) at imgresample.c:805
> #4  0x10011d80 in video_thread (arg=<value optimized out>) at ffplay.c:1254
> #5  0x0fe06000 in SDL_RunThread () from /usr/lib/libSDL-1.2.so.0
> #6  0x0fe41148 in RunThread () from /usr/lib/libSDL-1.2.so.0
> #7  0x0fdc0b44 in start_thread () from /lib/libpthread.so.0
> #8  0x0fd2c29c in clone () from /lib/libc.so.6
> 
> something else...
> 
> Breakpoint 1, sws_scale (ctx=0x10435bd0, src=0x10441050, 
> srcStride=0x10441060,
>     srcSliceY=0, srcSliceH=4580, dst=0x31905ca0, dstStride=0x31905cb0)
>     at imgresample.c:734
> 734             src_pict.linesize[i] = srcStride[i];
> (gdb) print *ctx
> $20 = {resampling_ctx = 0x10503630, src_pix_fmt = PIX_FMT_YUV420P,
>   dst_pix_fmt = PIX_FMT_YUV420P}
> (gdb) print *ctx->resampling_ctx
> $21 = {iwidth = 704, iheight = 4580, owidth = 704, oheight = 4580,
>   topBand = 1380401664, bottomBand = 16, leftBand = -2147483478,
>   rightBand = 3709809, padtop = 268500992, padbottom = 268435456,
>   padleft = 63488, padright = 2016, pad_owidth = 31, pad_oheight = 0,
>   h_incr = 0, v_incr = 0, h_filters = {{0, 0, 0, 0}, {0, 0, 0, 0}, {0, 
> 0, 0,
>       0}, {0, 0, 21063, 16896}, {0, 0, 0, 0}, {0, 0, 0, 0}, {0, 0, 0, 
> 0}, {0,
>       0, 224, 19984}, {4119, 5540, 4123, -27528}, {12889, 21849, 256, 
> 19840}, {
>       22869, 22834, 0, 16}, {-32768, 170, 56, -25743}, {4097, 0, 0, 0}, 
> {0, 0,
>       0, 0}, {0, 0, 0, 0}, {0, 8, 0, 8}}, v_filters = {{0, 8, 0, 1}, 
> {0, 2, 0,
>       2}, {0, 1, 0, 1}, {0, 1, 22869, 22870}, {0, 0, 0, 0}, {0, 0, 0, 
> 0}, {0,
>       0, 0, 0}, {0, 0, 224, 19984}, {4119, 5540, 4123, -27528}, {22870, 
> 22869,
>       256, 19840}, {21849, 22105, 0, 16}, {-32768, 170, 56, -25743}, 
> {4097, 0,
>       0, 0}, {0, 0, 0, 0}, {0, 0, 0, 0}, {0, 8, 0, 8}},
>   line_buf = 0x8 <Address 0x8 out of bounds>}
> (gdb) print *src
> $22 = (uint8_t *) 0x31909e30 '\200' <repeats 200 times>...
> (gdb) print *dst
> $23 = (uint8_t *) 0x32f76000 ""
> (gdb) print *dstStride
> $24 = 704
> 
> Breakpoint 2, img_copy (dst=0x31905bd8, src=0x31905bb8, pix_fmt=0, 
> width=704,
>     height=4580) at imgconvert.c:750
> 750         const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
> (gdb) print *dst
> $25 = {data = {0x32f76000 "", 0x3312e000 "", 0x330d6000 "",
>     0xfe4ae50 "Passed a NULL semaphore"}, linesize = {704, 352, 352,
>     234975239}}
> (gdb) print *src
> $26 = {data = {0x31909e30 '\200' <repeats 200 times>...,
>     0x31c46bb0 '\200' <repeats 200 times>...,
>     0x31d16bb0 '\200' <repeats 200 times>..., 0x0}, linesize = {736, 
> 368, 368,
>     0}}
> 
> I'll try to discover what's wrong tonight if I'm not too tired...

Any progress?

Diego




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