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af_hdcd: hdcd_analyze_gen() using int instead of float

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Signed-off-by: Burt P <pburt0@gmail.com>
This commit is contained in:
Burt P 2016-09-03 04:39:07 -05:00
parent eb0086588f
commit 38445d58f1
1 changed files with 4 additions and 5 deletions
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9
libavfilter/af_hdcd.c
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@ -1318,11 +1318,10 @@ static void hdcd_analyze_prepare(hdcd_state *state, int32_t *samples, int count,
/** encode a value in the given sample by adjusting the amplitude */
static int32_t hdcd_analyze_gen(int32_t sample, unsigned int v, unsigned int maxv)
{
float sflt = sample, vv = v;
vv /= maxv;
if (vv > 1.0) vv = 1.0;
sflt *= 1.0 + (vv * 18);
return (int32_t)sflt;
static const int r = 18, m = 1024;
int64_t s64 = sample;
v = m + (v * r * m / maxv);
return (int32_t)(s64 * v / m);
}
/** behaves like hdcd_envelope(), but encodes processing information in