diff options
| -rw-r--r-- | doc/filters.texi | 6 | ||||
| -rw-r--r-- | libavfilter/af_volume.c | 4 | ||||
| -rw-r--r-- | libavfilter/af_volume.h | 1 |
3 files changed, 10 insertions, 1 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 93625c6c80..f986623f00 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -633,6 +633,12 @@ Prefer track gain, if present. @item album 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. + @end table @subsection Examples diff --git a/libavfilter/af_volume.c b/libavfilter/af_volume.c index 165624e9df..823fa15144 100644 --- a/libavfilter/af_volume.c +++ b/libavfilter/af_volume.c @@ -59,6 +59,8 @@ static const AVOption 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 }, }; @@ -262,7 +264,7 @@ 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 ec13e80ae3..d831ec4a3d 100644 --- a/libavfilter/af_volume.h +++ b/libavfilter/af_volume.h @@ -47,6 +47,7 @@ typedef struct VolumeContext { AVFloatDSPContext fdsp; enum PrecisionType precision; enum ReplayGainType replaygain; + double replaygain_preamp; double volume; int volume_i; int channels; |