add channel_count() to audio source API

1 files changed, 31 insertions, 0 deletions

diff --git a/libs/ardour/audioregion.cc b/libs/ardour/audioregion.cc
index 8113b261f9..13576c3ca5 100644
--- a/libs/ardour/audioregion.cc
+++ b/libs/ardour/audioregion.cc
@@ -49,6 +49,9 @@
 #include "ardour/parameter_descriptor.h"
 #include "ardour/progress.h"
 
+#include "ardour/sndfilesource.h"
+#include "ardour/coreaudiosource.h"
+
 #include "i18n.h"
 #include <locale.h>
 
@@ -1562,6 +1565,34 @@ AudioRegion::audio_source (uint32_t n) const
 	return boost::dynamic_pointer_cast<AudioSource>(source(n));
 }
 
+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 = 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 = dynamic_pointer_cast<CoreAudioSource>(*i);
+            if (cauf) {
+                if (cauf->channel_count() > chan_count) {
+                    chan_count = cauf->channel_count();
+                }
+            }
+        }
+#endif // HAVE_COREAUDIO
+    }
+    
+    return chan_count;
+}
+
 int
 AudioRegion::adjust_transients (frameoffset_t delta)
 {