sndfile_reader.h

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#ifndef AUDIOGRAPHER_SNDFILE_READER_H
#define AUDIOGRAPHER_SNDFILE_READER_H
 
#include "pbd/compose.h"
 
#include "audiographer/utils/listed_source.h"
#include "audiographer/process_context.h"
#include "audiographer/sndfile/sndfile_base.h"
 
namespace AudioGrapher
{
 
template<typename T = DefaultSampleType>
class SndfileReader
  : public virtual SndfileBase
  , public ListedSource<T>
  , public Throwing<>
{
  public:
 
        SndfileReader (std::string const & path) : SndfileHandle (path) {}
        virtual ~SndfileReader () {}
 
        SndfileReader (SndfileReader const & other) : SndfileHandle (other) {}
        using SndfileHandle::operator=;
 
        samplecnt_t read (ProcessContext<T> & context)
        {
                if (throw_level (ThrowStrict) && context.channels() != channels() ) {
                        throw Exception (*this, string_compose
                                        ("Wrong number of channels given to process(), %1 instead of %2",
                                        context.channels(), channels()));
                }
 
                samplecnt_t const samples_read = SndfileHandle::read (context.data(), context.samples());
                ProcessContext<T> c_out = context.beginning (samples_read);
 
                if (samples_read < context.samples()) {
                        c_out.set_flag (ProcessContext<T>::EndOfInput);
                }
                this->output (c_out);
                return samples_read;
        }
 
  protected:
        SndfileReader () {}
};
 
} // namespace
 
#endif // AUDIOGRAPHER_SNDFILE_READER_H