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| author | Måns Rullgård <mans@mansr.com> | 2009-07-01 17:48:22 +0000 |
|---|---|---|
| committer | Måns Rullgård <mans@mansr.com> | 2009-07-01 17:48:22 +0000 |
| commit | ec62d942ea73d98ee2760746884779d7e0ccb6d3 (patch) | |
| tree | 70cf10800671c65573015da7518ecef9df8a7a6d /libavcodec | |
| parent | f7f1eb6cc9ce3e22dc48d20191eedc10008d878f (diff) | |
| download | ffmpeg-ec62d942ea73d98ee2760746884779d7e0ccb6d3.tar.gz | |
Fix potentially unaligned accesses in ff_copy_bits()
A pointer should never be assigned a value which may have less than the
required alignment of the target type. Compilers may assume pointer
values have the required alignment, and emit normal load/store instructions.
Unaligned pointers should use a character type or compiler-specific
type modifiers.
Originally committed as revision 19318 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/bitstream.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/libavcodec/bitstream.c b/libavcodec/bitstream.c index efb5a3bfdb..3706f43124 100644 --- a/libavcodec/bitstream.c +++ b/libavcodec/bitstream.c @@ -78,7 +78,6 @@ void ff_put_string(PutBitContext * pbc, const char *s, int terminate_string) void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length) { - const uint16_t *srcw= (const uint16_t*)src; int words= length>>4; int bits= length&15; int i; @@ -86,7 +85,7 @@ void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length) if(length==0) return; if(CONFIG_SMALL || words < 16 || put_bits_count(pb)&7){ - for(i=0; i<words; i++) put_bits(pb, 16, AV_RB16(&srcw[i])); + for(i=0; i<words; i++) put_bits(pb, 16, AV_RB16(src + 2*i)); }else{ for(i=0; put_bits_count(pb)&31; i++) put_bits(pb, 8, src[i]); @@ -95,7 +94,7 @@ void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length) skip_put_bytes(pb, 2*words-i); } - put_bits(pb, bits, AV_RB16(&srcw[words])>>(16-bits)); + put_bits(pb, bits, AV_RB16(src + 2*words)>>(16-bits)); } /* VLC decoding */ |