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Use bytestream_get_le16 to simplify offset/count calculation for mszh decompression.

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Originally committed as revision 19051 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2009-05-31 10:35:39 +00:00
parent 5a18221ba8
commit 2bee59083d
1 changed files with 3 additions and 4 deletions
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7
libavcodec/lcldec.c
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@ -43,6 +43,7 @@
#include "avcodec.h" #include "avcodec.h"
#include "get_bits.h" #include "get_bits.h"
#include "bytestream.h"
#include "lcl.h" #include "lcl.h"
#if CONFIG_ZLIB_DECODER #if CONFIG_ZLIB_DECODER
@ -96,10 +97,8 @@ static unsigned int mszh_decomp(unsigned char * srcptr, int srclen, unsigned cha
destptr += 4; destptr += 4;
srcptr += 4; srcptr += 4;
} else { } else {
ofs = *srcptr++; ofs = bytestream_get_le16(&srcptr);
cnt = *srcptr++; cnt = (ofs >> 11) + 1;
ofs += cnt * 256;
cnt = (cnt >> 3) + 1;
ofs &= 0x7ff; ofs &= 0x7ff;
cnt *= 4; cnt *= 4;
if (destptr_end - destptr < cnt) { if (destptr_end - destptr < cnt) {