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authorJohan Kiviniemi <devel@johan.kiviniemi.name>2010-08-23 15:19:16 +0300
committerJohan Kiviniemi <devel@johan.kiviniemi.name>2010-08-23 16:34:11 +0300
commited5d297301ad07e1c8f59b25184b4148046c1ebe (patch)
tree645d6fb1b92f922f123597d1760f2c550bf8d109 /src/filter
parent92b6ba9eff3b753078ae47a26f91743ddf937357 (diff)
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ReplayGain filter: allow gain > 100 %
The ReplayGain filter clamped the gain to max. 100 % even if the algorithm determined the signal needed a boost. That would result in any such tracks being played with too low volume, effectively defeating the purpose of the filter.
Diffstat (limited to 'src/filter')
-rw-r--r--src/filter/replay_gain_filter_plugin.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/src/filter/replay_gain_filter_plugin.c b/src/filter/replay_gain_filter_plugin.c
index 4d6080b73..3a0af66ff 100644
--- a/src/filter/replay_gain_filter_plugin.c
+++ b/src/filter/replay_gain_filter_plugin.c
@@ -55,8 +55,16 @@ struct replay_gain_filter {
struct replay_gain_info info;
/**
- * The current volume, between 0 and #PCM_VOLUME_1 (both
- * including).
+ * The current volume, between 0 and a value that may or may not exceed
+ * #PCM_VOLUME_1.
+ *
+ * If the default value of true is used for replaygain_limit, the
+ * application of the volume to the signal will never cause clipping.
+ *
+ * On the other hand, if the user has set replaygain_limit to false,
+ * the chance of clipping is explicitly preferred if that's required to
+ * maintain a consistent audio level. Whether clipping will actually
+ * occur depends on what value the user is using for replaygain_preamp.
*/
unsigned volume;
@@ -171,7 +179,7 @@ replay_gain_filter_filter(struct filter *_filter,
*dest_size_r = src_size;
- if (filter->volume >= PCM_VOLUME_1)
+ if (filter->volume == PCM_VOLUME_1)
/* optimized special case: 100% volume = no-op */
return src;