Signed-off-by: Burt P <[email protected]>
---
libavfilter/af_hdcd.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/libavfilter/af_hdcd.c b/libavfilter/af_hdcd.c
index cde2340..c8bda82 100644
--- a/libavfilter/af_hdcd.c
+++ b/libavfilter/af_hdcd.c
@@ -1316,11 +1316,10 @@ 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
--
2.7.4
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