+uint32_t
+AudioRegion::get_related_audio_file_channel_count () const
+{
+ uint32_t chan_count = 0;
+ for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
+
+ boost::shared_ptr<SndFileSource> sndf = boost::dynamic_pointer_cast<SndFileSource>(*i);
+ if (sndf ) {
+
+ if (sndf->channel_count() > chan_count) {
+ chan_count = sndf->channel_count();
+ }
+ }
+#ifdef HAVE_COREAUDIO
+ else {
+ boost::shared_ptr<CoreAudioSource> cauf = boost::dynamic_pointer_cast<CoreAudioSource>(*i);
+ if (cauf) {
+ if (cauf->channel_count() > chan_count) {
+ chan_count = cauf->channel_count();
+ }
+ }
+ }
+#endif // HAVE_COREAUDIO
+ }
+
+ return chan_count;
+}
+