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| author | Alex Converse <aconverse@google.com> | 2011-04-09 17:22:04 -0700 |
|---|---|---|
| committer | Alex Converse <alex.converse@gmail.com> | 2011-04-11 21:47:42 -0700 |
| commit | 187a537904ef2193a4b5e0312349f95223ff8610 (patch) | |
| tree | cf34aff4d5812a7b11731316e642d393fd9648b4 /libavcodec/aacdec.c | |
| parent | db46be01ecf44608932cfa33e8914a4c38b93431 (diff) | |
| download | ffmpeg-187a537904ef2193a4b5e0312349f95223ff8610.tar.gz | |
Convert some undefined 1<<31 shifts into 1U<<31.
According to ISO 9899:1999 S 6.5.7/4:
The result of E1 << E2 is E1 left-shifted E2 bit positions; vacated bits
are filled with zeros. If E1 has an unsigned type, the value of the
result is E1× 2^E2, reduced modulo one more than the maximum value
representable in the result type. If E1 has a signed type and
nonnegative value, and E1× 2^E2 is representable in the result type, then
that is the resulting value; otherwise, the behavior is undefined.
Diffstat (limited to 'libavcodec/aacdec.c')
| -rw-r--r-- | libavcodec/aacdec.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c index 3ce0dce491..c9761a1aef 100644 --- a/libavcodec/aacdec.c +++ b/libavcodec/aacdec.c @@ -964,19 +964,19 @@ static inline float *VMUL4S(float *dst, const float *v, unsigned idx, union float754 s = { .f = *scale }; union float754 t; - t.i = s.i ^ (sign & 1<<31); + t.i = s.i ^ (sign & 1U<<31); *dst++ = v[idx & 3] * t.f; sign <<= nz & 1; nz >>= 1; - t.i = s.i ^ (sign & 1<<31); + t.i = s.i ^ (sign & 1U<<31); *dst++ = v[idx>>2 & 3] * t.f; sign <<= nz & 1; nz >>= 1; - t.i = s.i ^ (sign & 1<<31); + t.i = s.i ^ (sign & 1U<<31); *dst++ = v[idx>>4 & 3] * t.f; sign <<= nz & 1; nz >>= 1; - t.i = s.i ^ (sign & 1<<31); + t.i = s.i ^ (sign & 1U<<31); *dst++ = v[idx>>6 & 3] * t.f; return dst; @@ -1169,11 +1169,11 @@ static int decode_spectrum_and_dequant(AACContext *ac, float coef[1024], b += 4; n = (1 << b) + SHOW_UBITS(re, gb, b); LAST_SKIP_BITS(re, gb, b); - *icf++ = cbrt_tab[n] | (bits & 1<<31); + *icf++ = cbrt_tab[n] | (bits & 1U<<31); bits <<= 1; } else { unsigned v = ((const uint32_t*)vq)[cb_idx & 15]; - *icf++ = (bits & 1<<31) | v; + *icf++ = (bits & 1U<<31) | v; bits <<= !!v; } cb_idx >>= 4; |