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avfilter/af_sidechaincompress: add forgotten option

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-11-25 12:44:07 +01:00
parent 29af74e4e3
commit 5b106215ba
2 changed files with 8 additions and 1 deletions
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4
doc/filters.texi
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@ -2383,6 +2383,10 @@ reduction. Default is @code{average}.
@item detection
Should the exact signal be taken in case of @code{peak} or an RMS one in case
of @code{rms}. Default is @code{rms} which is mainly smoother.
@item mix
How much to use compressed signal in output. Default is 1.
Range is between 0 and 1.
@end table
@subsection Examples

5
libavfilter/af_sidechaincompress.c
View File

@ -44,6 +44,7 @@ typedef struct SidechainCompressContext {
double ratio;
double threshold;
double makeup;
double mix;
double thres;
double knee;
double knee_start;
@ -73,6 +74,7 @@ static const AVOption sidechaincompress_options[] = {
{ "detection", "set detection", OFFSET(detection), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, A|F, "detection" },
{ "peak", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A|F, "detection" },
{ "rms", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A|F, "detection" },
{ "mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, A|F },
{ NULL }
};
@ -131,6 +133,7 @@ static int filter_frame(AVFilterLink *link, AVFrame *frame)
AVFilterLink *sclink = ctx->inputs[1];
AVFilterLink *outlink = ctx->outputs[0];
const double makeup = s->makeup;
const double mix = s->mix;
const double *scsrc;
double *sample;
int nb_samples;
@ -177,7 +180,7 @@ static int filter_frame(AVFilterLink *link, AVFrame *frame)
s->compressed_knee_stop, s->detection);
for (c = 0; c < outlink->channels; c++)
sample[c] *= gain * makeup;
sample[c] *= (gain * makeup * mix + (1. - mix));
sample += outlink->channels;
scsrc += sclink->channels;