diff options
| author | Alessandro Ghedini <alessandro@ghedini.me> | 2014-04-04 18:42:09 +0200 |
|---|---|---|
| committer | Anton Khirnov <anton@khirnov.net> | 2014-04-04 18:53:05 +0200 |
| commit | a49aa440c939e221194f8d95bf98673f8cf38a06 (patch) | |
| tree | c643b5b59ea2486d8a01b640ad00227d72bf3c21 /libavfilter/af_volume.c | |
| parent | c74b86699c86bdf62e8570f41d8a38be5710baa3 (diff) | |
af_volume: implement replaygain pre-amplification
This adds a new "replaygain_preamp" option to the filter, and simply adds its
value to the replaygain gain value.
Signed-off-by: Anton Khirnov <anton@khirnov.net>
Diffstat (limited to 'libavfilter/af_volume.c')
| -rw-r--r-- | libavfilter/af_volume.c | 4 |
1 files changed, 3 insertions, 1 deletions
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); |