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dca: fix signed overflow in shift

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Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard 2011-10-08 13:49:42 +01:00
parent d12294304a
commit 559c244d42
1 changed files with 2 additions and 1 deletions
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libavcodec/dca.c
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@ -909,7 +909,8 @@ static void qmf_32_subbands(DCAContext * s, int chans,
for (subindex = 0; subindex < 8; subindex++) { for (subindex = 0; subindex < 8; subindex++) {
/* Load in one sample from each subband and clear inactive subbands */ /* Load in one sample from each subband and clear inactive subbands */
for (i = 0; i < sb_act; i++){ for (i = 0; i < sb_act; i++){
uint32_t v = AV_RN32A(&samples_in[i][subindex]) ^ ((i-1)&2)<<30; unsigned sign = (i - 1) & 2;
uint32_t v = AV_RN32A(&samples_in[i][subindex]) ^ sign << 30;
AV_WN32A(&s->raXin[i], v); AV_WN32A(&s->raXin[i], v);
} }