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Backwards compatible sndfile support

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SFC_SET_COMPRESSION_LEVEL was only added in 2012 and only available in
libsndfile 1.0.26 or later.
This commit is contained in:
Robin Gareus 2018-11-22 20:36:41 +01:00
parent e297951b30
commit 7ed37d67ff
1 changed files with 5 additions and 2 deletions
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7
libs/ardour/export_graph_builder.cc
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@ -307,10 +307,13 @@ ExportGraphBuilder::Encoder::init_writer (boost::shared_ptr<AudioGrapher::Sndfil
writer.reset (new AudioGrapher::SndfileWriter<T> (writer_filename, format, channels, config.format->sample_rate(), config.broadcast_info));
writer->FileWritten.connect_same_thread (copy_files_connection, boost::bind (&ExportGraphBuilder::Encoder::copy_files, this, _1));
if (format & ExportFormatBase::SF_Vorbis) {
/* libsndfile uses range 0..1 (best .. worst) */
/* libsndfile uses range 0..1 (worst.. best) for
* SFC_SET_VBR_ENCODING_QUALITY and maps
* SFC_SET_COMPRESSION_LEVEL = 1.0 - VBR_ENCODING_QUALITY
*/
double vorbis_quality = 1.0 - config.format->codec_quality () / 100.f;
if (vorbis_quality >= 0 && vorbis_quality <= 1.0) {
writer->command (SFC_SET_COMPRESSION_LEVEL, &vorbis_quality, sizeof (double));
writer->command (SFC_SET_VBR_ENCODING_QUALITY, &vorbis_quality, sizeof (double));
}
}
}