[FFmpeg-cvslog] avfilter/af_compand: fix default companding to avoid clipping

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Sun May 14 11:59:04 2017 +0200| [69b83f599224932a94d56081d008d373e1e51709] | committer: Paul B Mahol

avfilter/af_compand: fix default companding to avoid clipping

Signed-off-by: Paul B Mahol <onemda at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=69b83f599224932a94d56081d008d373e1e51709
---

 doc/filters.texi         | 2 +-
 libavfilter/af_compand.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/filters.texi b/doc/filters.texi
index 5985db6021..0ea4e26998 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -2080,7 +2080,7 @@ the following syntax: @code{x0/y0|x1/y1|x2/y2|....} or
 The input values must be in strictly increasing order but the transfer function
 does not have to be monotonically rising. The point @code{0/0} is assumed but
 may be overridden (by @code{0/out-dBn}). Typical values for the transfer
-function are @code{-70/-70|-60/-20}.
+function are @code{-70/-70|-60/-20|1/0}.
 
 @item soft-knee
 Set the curve radius in dB for all joints. It defaults to 0.01.
diff --git a/libavfilter/af_compand.c b/libavfilter/af_compand.c
index 2acaa99ea2..8ff0ff9465 100644
--- a/libavfilter/af_compand.c
+++ b/libavfilter/af_compand.c
@@ -74,7 +74,7 @@ typedef struct CompandContext {
 static const AVOption compand_options[] = {
     { "attacks", "set time over which increase of volume is determined", OFFSET(attacks), AV_OPT_TYPE_STRING, { .str = "0.3" }, 0, 0, A },
     { "decays", "set time over which decrease of volume is determined", OFFSET(decays), AV_OPT_TYPE_STRING, { .str = "0.8" }, 0, 0, A },
-    { "points", "set points of transfer function", OFFSET(points), AV_OPT_TYPE_STRING, { .str = "-70/-70|-60/-20" }, 0, 0, A },
+    { "points", "set points of transfer function", OFFSET(points), AV_OPT_TYPE_STRING, { .str = "-70/-70|-60/-20|1/0" }, 0, 0, A },
     { "soft-knee", "set soft-knee", OFFSET(curve_dB), AV_OPT_TYPE_DOUBLE, { .dbl = 0.01 }, 0.01, 900, A },
     { "gain", "set output gain", OFFSET(gain_dB), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, -900, 900, A },
     { "volume", "set initial volume", OFFSET(initial_volume), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, -900, 0, A },