diff options
| author | Burt P <pburt0@gmail.com> | 2016-09-03 04:39:07 -0500 |
|---|---|---|
| committer | Burt P <pburt0@gmail.com> | 2016-09-07 10:59:18 -0500 |
| commit | 38445d58f1a1cdc69bb11309e07aa99360bf466b (patch) | |
| tree | 96ef144351ca3d87dd5de7e2ff81d7e6279cd1e7 /libavfilter | |
| parent | eb0086588f1823841108ab1dee08683ab67cf507 (diff) | |
| download | ffmpeg-38445d58f1a1cdc69bb11309e07aa99360bf466b.tar.gz | |
af_hdcd: hdcd_analyze_gen() using int instead of float
Signed-off-by: Burt P <pburt0@gmail.com>
Diffstat (limited to 'libavfilter')
| -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 a8a3d59448..96d5a0faf1 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 |