updated swedish translation from peppo

[ardour.git] / libs / appleutility / CAAudioUnit.cpp

diff --git a/libs/appleutility/CAAudioUnit.cpp b/libs/appleutility/CAAudioUnit.cpp
index 9244877d29f27e9e9d52ae753b82bebe2f74a21c..aaf57f233de261515c033c9bcc0728017c540e64 100644 (file)
--- a/libs/appleutility/CAAudioUnit.cpp
+++ b/libs/appleutility/CAAudioUnit.cpp
@@ -328,6 +328,46 @@ bool               CAAudioUnit::CanDo (    int                             inChannelsIn,
        return ValidateChannelPair (inChannelsIn, inChannelsOut, info.mChanInfo, (dataSize / sizeof (AUChannelInfo)));
 }
 
+int    CAAudioUnit::GetChannelInfo (AUChannelInfo** chaninfo, UInt32& cnt)
+{
+       // this is the default assumption of an audio effect unit
+       Boolean* isWritable = 0;
+       UInt32  dataSize = 0;
+               // lets see if the unit has any channel restrictions
+       OSStatus result = AudioUnitGetPropertyInfo (AU(),
+                                                   kAudioUnitProperty_SupportedNumChannels,
+                                                   kAudioUnitScope_Global, 0,
+                                                   &dataSize, isWritable); //don't care if this is writable
+       
+       // if this property is NOT implemented an FX unit
+       // is expected to deal with same channel valance in and out
+       
+       if (result) 
+       {
+               if (Comp().Desc().IsEffect()) 
+               {
+                       return 1;
+               }
+               else 
+               {
+                       // the au should either really tell us about this
+                       // or we will assume the worst
+                       return -1;
+               }
+       }
+
+       *chaninfo = (AUChannelInfo*) malloc (dataSize);
+       cnt = dataSize / sizeof (AUChannelInfo);
+
+       result = GetProperty (kAudioUnitProperty_SupportedNumChannels,
+                             kAudioUnitScope_Global, 0,
+                             *chaninfo, &dataSize);
+
+       if (result) { return -1; }
+       return 0;
+}
+
+
 bool   CAAudioUnit::ValidateChannelPair (int                           inChannelsIn, 
                                                                                int                             inChannelsOut,
                                                                                const AUChannelInfo * info,