#3014: sws_scale() renders a frame buffer invalid for memory freeing in a
specific
situation
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Reporter: cyril | Owner:
Type: defect | Status: new
Priority: normal | Component: swscale
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by cyril):
It seems like nobody wants to analyze the issue. Well, I did some more
investigations.
The frame buffer ''pDest'' still get corrupted by ''sws_scale()'' and then
cannot be freed by ''avpicture_free()'' even if I only use MinGW tools to
compile and then debug this simple application. So this bug is really not
related to VC++ or whatever.
Moreover, I can see that ''sws_scale()'' eventually calls the function
pointed by ''pSwsContext.swscale'', which is set to
''yuv420_rgb32_MMX()''.
The source code for ''yuv420_rgb32_MMX()'' can be found in
''libswscale/x86/yuv2rgb_template.c'' and refers to assembly codes.
I can't read assembly and don't know how to fix this. So I hope that
somebody with ASM skills is willing to look at this :)
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/3014#comment:1>
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