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af_volume: add a replaygain fallback option

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This commit is contained in:
wm4 2015-06-23 15:07:19 +02:00
parent e7d5a5e688
commit 4c6a600943
2 changed files with 9 additions and 0 deletions
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4
DOCS/man/af.rst
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@ -287,6 +287,10 @@ Available filters are:
``replaygain-clip=yes|no``
Prevent clipping caused by replaygain by automatically lowering the
gain (default). Use ``replaygain-clip=no`` to disable this.
``replaygain-fallback``
Gain in dB to apply if the file has no replay gain tags. This option
is always applied if the replaygain logic is somehow inactive. If this
is applied, no other replaygain options are applied.
``softclip``
Turns soft clipping on. Soft-clipping can make the
sound more smooth if very high volume levels are used. Enable this

5
audio/filter/af_volume.c
View File

@ -37,6 +37,7 @@ struct priv {
int rgain_album; // Enable/disable album based replaygain
float rgain_preamp; // Set replaygain pre-amplification
int rgain_clip; // Enable/disable clipping prevention
float replaygain_fallback;
int soft; // Enable/disable soft clipping
int fast; // Use fix-point volume control
int detach; // Detach if gain volume is neutral
@ -82,6 +83,9 @@ static int control(struct af_instance *af, int cmd, void *arg)
s->rgain = MPMIN(s->rgain, 1.0 / peak);
MP_VERBOSE(af, "...with clipping prevention: %f\n", s->rgain);
}
} else if (s->replaygain_fallback) {
af_from_dB(1, &s->replaygain_fallback, &s->rgain, 20.0, -200.0, 60.0);
MP_VERBOSE(af, "Applying fallback gain: %f\n", s->rgain);
}
if (s->detach && fabs(s->level * s->rgain - 1.0) < 0.00001)
return AF_DETACH;
@ -165,6 +169,7 @@ const struct af_info af_info_volume = {
OPT_FLAG("replaygain-album", rgain_album, 0),
OPT_FLOATRANGE("replaygain-preamp", rgain_preamp, 0, -15, 15),
OPT_FLAG("replaygain-clip", rgain_clip, 0),
OPT_FLOATRANGE("replaygain-fallback", replaygain_fallback, 0, -200, 60),
OPT_FLAG("softclip", soft, 0),
OPT_FLAG("s16", fast, 0),
OPT_FLAG("detach", detach, 0),