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avfilter/af_afreqshift: add level option

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This commit is contained in:
Paul B Mahol 2020-12-05 14:44:14 +01:00
parent 34773ee69f
commit 530d1dbcef
2 changed files with 19 additions and 6 deletions
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12
doc/filters.texi
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@ -1419,11 +1419,15 @@ The filter accepts the following options:
@item shift
Specify frequency shift. Allowed range is -INT_MAX to INT_MAX.
Default value is 0.0.
@item level
Set output gain applied to final output. Allowed range is from -1.0 to 1.0.
Default value is 1.0.
@end table
@subsection Commands
This filter supports the above option as @ref{commands}.
This filter supports the all above options as @ref{commands}.
@section agate
@ -2182,11 +2186,15 @@ The filter accepts the following options:
@item shift
Specify phase shift. Allowed range is from -1.0 to 1.0.
Default value is 0.0.
@item level
Set output gain applied to final output. Allowed range is from -1.0 to 1.0.
Default value is 1.0.
@end table
@subsection Commands
This filter supports the above option as @ref{commands}.
This filter supports the all above options as @ref{commands}.
@section apulsator

13
libavfilter/af_afreqshift.c
View File

@ -32,6 +32,7 @@ typedef struct AFreqShift {
const AVClass *class;
double shift;
double level;
double c[NB_COEFS];
@ -85,7 +86,8 @@ static void pfilter_channel(AVFilterContext *ctx,
double *i2, double *o2)
{
AFreqShift *s = ctx->priv;
double *c = s->c;
const double *c = s->c;
const double level = s->level;
double shift = s->shift * M_PI;
double cos_theta = cos(shift);
double sin_theta = sin(shift);
@ -113,7 +115,7 @@ static void pfilter_channel(AVFilterContext *ctx,
}
Q = o2[NB_COEFS - 1];
dst[n] = I * cos_theta - Q * sin_theta;
dst[n] = (I * cos_theta - Q * sin_theta) * level;
}
}
@ -125,7 +127,8 @@ static void ffilter_channel(AVFilterContext *ctx,
double *i2, double *o2)
{
AFreqShift *s = ctx->priv;
double *c = s->c;
const double *c = s->c;
const double level = s->level;
double ts = 1. / sample_rate;
double shift = s->shift;
int64_t N = s->in_samples;
@ -154,7 +157,7 @@ static void ffilter_channel(AVFilterContext *ctx,
Q = o2[NB_COEFS - 1];
theta = 2. * M_PI * fmod(shift * (N + n) * ts, 1.);
dst[n] = I * cos(theta) - Q * sin(theta);
dst[n] = (I * cos(theta) - Q * sin(theta)) * level;
}
}
@ -345,6 +348,7 @@ static av_cold void uninit(AVFilterContext *ctx)
static const AVOption afreqshift_options[] = {
{ "shift", "set frequency shift", OFFSET(shift), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -INT_MAX, INT_MAX, FLAGS },
{ "level", "set output level", OFFSET(level), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.0, 1.0, FLAGS },
{ NULL }
};
@ -384,6 +388,7 @@ AVFilter ff_af_afreqshift = {
static const AVOption aphaseshift_options[] = {
{ "shift", "set phase shift", OFFSET(shift), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1.0, 1.0, FLAGS },
{ "level", "set output level",OFFSET(level), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.0, 1.0, FLAGS },
{ NULL }
};