diff options
| -rw-r--r-- | doc/filters.texi | 12 | ||||
| -rw-r--r-- | libavfilter/af_afreqshift.c | 13 |
2 files changed, 19 insertions, 6 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 6200590f84..99fcae2650 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -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 diff --git a/libavfilter/af_afreqshift.c b/libavfilter/af_afreqshift.c index a61c15a97e..4cc4e27c1c 100644 --- a/libavfilter/af_afreqshift.c +++ b/libavfilter/af_afreqshift.c @@ -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 } }; |