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Viewing changes to libs/audiographer/audiographer/utils/listed_source.h

  • Committer: Package Import Robot
  • Author(s): Felipe Sateler
  • Date: 2013-09-21 19:05:02 UTC
  • Revision ID: package-import@ubuntu.com-20130921190502-8gsftrku6jnzhd7v
Tags: upstream-3.4~dfsg
Import upstream version 3.4~dfsg

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