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Map sndfile/opus quality to bitrate

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This commit is contained in:
Robin Gareus
2022-12-06 05:34:18 +01:00
parent 4acc458a78
commit 4d05c7add9
3 changed files with 21 additions and 7 deletions
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2
libs/ardour/ardour/export_formats.h
View File

@@ -373,7 +373,7 @@ public:
}
int default_codec_quality () const
{
return 40;
return 49;
}
virtual bool supports_tagging () const
{

10
libs/ardour/export_format_specification.cc
View File

@@ -449,7 +449,15 @@ ExportFormatSpecification::set_state (const XMLNode & root)
_codec_quality = -2;
}
else if (format_id() == F_Ogg) {
_codec_quality = 40;
switch (sample_format ()) {
default:
case SF_Vorbis:
_codec_quality = 40;
break;
case SF_Opus:
_codec_quality = 49;
break;
}
}
}

16
libs/ardour/export_formats.cc
View File

@@ -401,11 +401,17 @@ ExportFormatOggOpus::ExportFormatOggOpus ()
set_format_id (F_Ogg);
sample_formats.insert (SF_Opus);
// libsndfile doesn't expose direct quality control - use these coarse approximations
add_codec_quality ("Low (0%)", 0);
add_codec_quality ("Default (40%)", 40);
add_codec_quality ("High (60%)", 60);
add_codec_quality ("Very High (100%)", 100);
/* libsndfile doesn't expose direct quality control,
* bitrate = (((1.0 - quality) * (250000.0)) + 6000.0)
*/
add_codec_quality ("6 kb/s/channel", 0);
add_codec_quality ("32 kb/s/channel", 10); // 10.4
add_codec_quality ("64 kb/s/channel", 23); // 23.2
add_codec_quality ("96 kb/s/channel", 36);
add_codec_quality ("128 kb/s/channel", 49); // 48.8
add_codec_quality ("160 kb/s/channel", 61); // 61.6
add_codec_quality ("192 kb/s/channel", 74); // 74.42
add_codec_quality ("256 kb/s/channel", 100);
set_extension ("opus");
set_quality (Q_LossyCompression);