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| author | Michael Niedermayer <michaelni@gmx.at> | 2011-10-31 01:36:02 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2011-10-31 01:53:37 +0100 |
| commit | f44ad92c3fc87daa0e2e9f5499662050be8b2bf3 (patch) | |
| tree | d34db36fb1627b9a28ecaef0e208cd2e2f165938 | |
| parent | fbf4b390d02ac53ce8558016c791d7e21b8ebfa4 (diff) | |
| download | ffmpeg-f44ad92c3fc87daa0e2e9f5499662050be8b2bf3.tar.gz | |
sws: print a warning on unaligned input on SSE2+
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libswscale/swscale.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libswscale/swscale.c b/libswscale/swscale.c index d5dfa07a31..bde730773d 100644 --- a/libswscale/swscale.c +++ b/libswscale/swscale.c @@ -2539,6 +2539,18 @@ static int swScale(SwsContext *c, const uint8_t* src[], } } + if ((int)dst[0]%16 || (int)dst[1]%16 || (int)dst[2]%16 || (int)src[0]%16 || (int)src[1]%16 || (int)src[2]%16 + || dstStride[0]%16 || dstStride[1]%16 || dstStride[2]%16 || dstStride[3]%16 + || srcStride[0]%16 || srcStride[1]%16 || srcStride[2]%16 || srcStride[3]%16 + ) { + static int warnedAlready=0; + int cpu_flags = av_get_cpu_flags(); + if (HAVE_MMX2 && (cpu_flags & AV_CPU_FLAG_SSE2) && !warnedAlready){ + av_log(c, AV_LOG_WARNING, "Warning: data is not aligned! This can lead to a speedloss\n"); + warnedAlready=1; + } + } + /* Note the user might start scaling the picture in the middle so this will not get executed. This is not really intended but works currently, so people might do it. */ |