diff --git a/doc/filters.texi b/doc/filters.texi index c87065d3b0..9879987255 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -1847,6 +1847,11 @@ Prefer track gain, if present. Prefer album gain, if present. @end table +@item replaygain_preamp +Pre-amplification gain in dB to apply to the selected replaygain gain. + +Default value for @var{replaygain_preamp} is 0.0. + @item eval Set when the volume expression is evaluated. diff --git a/libavfilter/af_volume.c b/libavfilter/af_volume.c index 5dfec06fcf..6fded4f4c1 100644 --- a/libavfilter/af_volume.c +++ b/libavfilter/af_volume.c @@ -79,6 +79,8 @@ static const AVOption volume_options[] = { { "ignore", "replaygain side data is ignored", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_IGNORE }, 0, 0, A, "replaygain" }, { "track", "track gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_TRACK }, 0, 0, A, "replaygain" }, { "album", "album gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_ALBUM }, 0, 0, A, "replaygain" }, + { "replaygain_preamp", "Apply replaygain pre-amplification", + OFFSET(replaygain_preamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, -15.0, 15.0, A }, { NULL }, }; @@ -358,7 +360,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf) av_log(inlink->dst, AV_LOG_VERBOSE, "Using gain %f dB from replaygain side data.\n", g); - vol->volume = pow(10, g / 20); + vol->volume = pow(10, (g + vol->replaygain_preamp) / 20); vol->volume_i = (int)(vol->volume * 256 + 0.5); volume_init(vol); diff --git a/libavfilter/af_volume.h b/libavfilter/af_volume.h index 9f81790ec3..18226b1612 100644 --- a/libavfilter/af_volume.h +++ b/libavfilter/af_volume.h @@ -75,6 +75,7 @@ typedef struct VolumeContext { double var_values[VAR_VARS_NB]; enum ReplayGainType replaygain; + double replaygain_preamp; double volume; int volume_i; int channels;