AudioGraphChannel.h

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/**********************************************************************
 
 Audacity: A Digital Audio Editor
 
 @file AudioGraphChannel.h
 
 @brief Abstraction of a channel of a wide stream that knows whether it is mono,
 left, or right
 
 Paul Licameli
 
 **********************************************************************/
#ifndef __AUDACITY_AUDIO_GRAPH_CHANNEL__
#define __AUDACITY_AUDIO_GRAPH_CHANNEL__
 
namespace AudioGraph {
enum ChannelType : unsigned
{
   MonoChannel,
   LeftChannel,
   RightChannel,
};
 
struct AUDIO_GRAPH_API Channel {
   virtual ~Channel();
   virtual ChannelType GetChannelType() const = 0;
};
 
inline bool IsMono(const Channel &channel) {
   return channel.GetChannelType() == MonoChannel;
}
 
inline bool PlaysLeft(const Channel &channel) {
   const auto type = channel.GetChannelType();
   return type == MonoChannel || type == LeftChannel;
}
inline bool PlaysRight(const Channel &channel) {
   const auto type = channel.GetChannelType();
   return type == MonoChannel || type == RightChannel;
}
 
}
 
#endif