af_volume: support using replaygain frame side data

1 files changed, 17 insertions, 0 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index 8d46cd1fb4..93625c6c80 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -616,6 +616,23 @@ precision of the volume scaling.
 @item double
 64-bit floating-point; limits input sample format to DBL.
 @end table
+
+@item replaygain
+Behaviour on encountering ReplayGain side data in input frames.
+
+@table @option
+@item drop
+Remove ReplayGain side data, ignoring its contents (the default).
+
+@item ignore
+Ignore ReplayGain side data, but leave it in the frame.
+
+@item track
+Prefer track gain, if present.
+
+@item album
+Prefer album gain, if present.
+@end table
 @end table
 
 @subsection Examples