Add a mono<->stereo converter

This converter always outputs floats, and uses energy-preserving scaling.

1 files changed, 12 insertions, 0 deletions

diff --git a/Alc/converter.h b/Alc/converter.h
index 5bbbf691..db3f1daa 100644
--- a/Alc/converter.h
+++ b/Alc/converter.h
@@ -35,6 +35,18 @@ void DestroySampleConverter(SampleConverter **converter);
 ALsizei SampleConverterInput(SampleConverter *converter, const ALvoid **src, ALsizei *srcframes, ALvoid *dst, ALsizei dstframes);
 ALsizei SampleConverterAvailableOut(SampleConverter *converter, ALsizei srcframes);
 
+
+typedef struct ChannelConverter {
+    enum DevFmtType mSrcType;
+    enum DevFmtChannels mSrcChans;
+    enum DevFmtChannels mDstChans;
+} ChannelConverter;
+
+ChannelConverter *CreateChannelConverter(enum DevFmtType srcType, enum DevFmtChannels srcChans, enum DevFmtChannels dstChans);
+void DestroyChannelConverter(ChannelConverter **converter);
+
+void ChannelConverterInput(ChannelConverter *converter, const ALvoid *src, ALfloat *dst, ALsizei frames);
+
 #ifdef __cpluspluc
 }
 #endif