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Overhaul export loudness normalization

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* Fix exporting multiple formats with different
  normalization settings or demo-noise settings
* Add true-peak limiter (based on x42-limiter dpl.lv2)
* Optionally use a limiter for loudness normalization
* Fall back to short-term loudness when normalizing
  material too short for integrating loudness.
This commit is contained in:
Robin Gareus
2021-04-07 21:03:22 +02:00
parent 8f5c3fcddb
commit 75829d20f2
15 changed files with 903 additions and 126 deletions
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11
libs/ardour/export_format_specification.cc
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@@ -150,6 +150,7 @@ ExportFormatSpecification::ExportFormatSpecification (Session & s)
, _normalize (false)
, _normalize_loudness (false)
, _use_tp_limiter (true)
, _normalize_dbfs (GAIN_COEFF_UNITY)
, _normalize_lufs (-23)
, _normalize_dbtp (-1)
@@ -189,6 +190,7 @@ ExportFormatSpecification::ExportFormatSpecification (Session & s, XMLNode const
, _normalize (false)
, _normalize_loudness (false)
, _use_tp_limiter (true)
, _normalize_dbfs (GAIN_COEFF_UNITY)
, _normalize_lufs (-23)
, _normalize_dbtp (-1)
@@ -251,6 +253,7 @@ ExportFormatSpecification::ExportFormatSpecification (ExportFormatSpecification
set_trim_end (other.trim_end());
set_normalize (other.normalize());
set_normalize_loudness (other.normalize_loudness());
set_use_tp_limiter (other.use_tp_limiter());
set_normalize_dbfs (other.normalize_dbfs());
set_normalize_lufs (other.normalize_lufs());
set_normalize_dbtp (other.normalize_dbtp());
@@ -319,6 +322,7 @@ ExportFormatSpecification::get_state ()
node = processing->add_child ("Normalize");
node->set_property ("enabled", normalize());
node->set_property ("loudness", normalize_loudness());
node->set_property ("use-tp-limiter", use_tp_limiter());
node->set_property ("dbfs", normalize_dbfs());
node->set_property ("lufs", normalize_lufs());
node->set_property ("dbtp", normalize_dbtp());
@@ -458,9 +462,9 @@ ExportFormatSpecification::set_state (const XMLNode & root)
if ((child = proc->child ("Normalize"))) {
child->get_property ("enabled", _normalize);
// old formats before ~ 4.7-930ish
child->get_property ("target", _normalize_dbfs);
child->get_property ("target", _normalize_dbfs); // old formats before ~ 4.7-930ish
child->get_property ("loudness", _normalize_loudness);
child->get_property ("use-tp-limiter", _use_tp_limiter);
child->get_property ("dbfs", _normalize_dbfs);
child->get_property ("lufs", _normalize_lufs);
child->get_property ("dbtp", _normalize_dbtp);
@@ -616,6 +620,9 @@ ExportFormatSpecification::description (bool include_name)
if (_normalize) {
if (_normalize_loudness) {
components.push_back (_("normalize loudness"));
if (_use_tp_limiter) {
components.push_back (_("limit peak"));
}
} else {
components.push_back (_("normalize peak"));
}