diff options
| -rw-r--r-- | libavfilter/af_hdcd.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/libavfilter/af_hdcd.c b/libavfilter/af_hdcd.c index a8a3d59..96d5a0f 100644 --- a/libavfilter/af_hdcd.c +++ b/libavfilter/af_hdcd.c @@ -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 |
