listed_source.h

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#ifndef AUDIOGRAPHER_LISTED_SOURCE_H
#define AUDIOGRAPHER_LISTED_SOURCE_H
 
#include "audiographer/visibility.h"
#include "audiographer/types.h"
#include "audiographer/types.h"
#include "audiographer/source.h"
 
#include <list>
 
namespace AudioGrapher
{
 
template<typename T = DefaultSampleType>
class LIBAUDIOGRAPHER_API ListedSource : public Source<T>
{
  public:
        void add_output (typename Source<T>::SinkPtr output) { outputs.push_back(output); }
        void clear_outputs () { outputs.clear(); }
        void remove_output (typename Source<T>::SinkPtr output) { outputs.remove(output); }
 
  protected:
 
        typedef std::list<typename Source<T>::SinkPtr> SinkList;
 
        void output (ProcessContext<T> const & c)
        {
                for (typename SinkList::iterator i = outputs.begin(); i != outputs.end(); ++i) {
                        (*i)->process (c);
                }
        }
 
        void output (ProcessContext<T> & c)
        {
                if (output_size_is_one()) {
                        // only one output, so we can keep this non-const
                        outputs.front()->process (c);
                } else {
                        output (const_cast<ProcessContext<T> const &> (c));
                }
        }
 
        inline bool output_size_is_one () { return (!outputs.empty() && ++outputs.begin() == outputs.end()); }
 
        SinkList outputs;
};
 
} // namespace
 
#endif //AUDIOGRAPHER_LISTED_SOURCE_H