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Prevent unaligned memory accesses whilst reading seektable - fixes FLAC playback on iPod

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8477 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2006-01-29 01:31:28 +00:00
parent 281403a4d8
commit b0302f0cbb
1 changed files with 13 additions and 7 deletions
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20
apps/codecs/flac.c
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@ -86,7 +86,6 @@ static bool flac_init(FLACContext* fc, int first_frame_offset)
int endofmetadata=0;
int blocklength;
int n;
uint32_t* p;
ci->memset(fc,0,sizeof(FLACContext));
nseekpoints=0;
@ -152,12 +151,19 @@ static bool flac_init(FLACContext* fc, int first_frame_offset)
if (n < 18) return false;
blocklength-=n;
p=(uint32_t*)buf;
seekpoint_hi=betoh32(*(p++));
seekpoint_lo=betoh32(*(p++));
offset_hi=betoh32(*(p++));
offset_lo=betoh32(*(p++));
seekpoint_hi=(buf[0] << 24) | (buf[1] << 16) |
(buf[2] << 8) | buf[3];
seekpoint_lo=(buf[4] << 24) | (buf[5] << 16) |
(buf[6] << 8) | buf[7];
offset_hi=(buf[8] << 24) | (buf[9] << 16) |
(buf[10] << 8) | buf[11];
offset_lo=(buf[12] << 24) | (buf[13] << 16) |
(buf[14] << 8) | buf[15];
/* The final two bytes contain the number of samples in the
target frame - but we don't care about that. */
/* Only store seekpoints where the high 32 bits are zero */
if ((seekpoint_hi == 0) && (seekpoint_lo != 0xffffffff) &&
(offset_hi == 0)) {
seekpoints[nseekpoints].sample=seekpoint_lo;