sr_converter.h

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#ifndef AUDIOGRAPHER_SR_CONVERTER_H
#define AUDIOGRAPHER_SR_CONVERTER_H
 
#include <samplerate.h>
 
#include "audiographer/visibility.h"
#include "audiographer/flag_debuggable.h"
#include "audiographer/sink.h"
#include "audiographer/throwing.h"
#include "audiographer/types.h"
#include "audiographer/utils/listed_source.h"
 
namespace AudioGrapher
{
 
class LIBAUDIOGRAPHER_API SampleRateConverter
  : public ListedSource<float>
  , public Sink<float>
  , public FlagDebuggable<>
  , public Throwing<>
{
  public:
        SampleRateConverter (uint32_t channels);
        ~SampleRateConverter ();
 
        void init (samplecnt_t in_rate, samplecnt_t out_rate, int quality = 0);
 
        samplecnt_t allocate_buffers (samplecnt_t max_samples);
 
        void process (ProcessContext<float> const & c);
        using Sink<float>::process;
 
  private:
 
        void set_end_of_input (ProcessContext<float> const & c);
        void reset ();
 
        bool           active;
        uint32_t       channels;
        samplecnt_t     max_samples_in;
 
        float *        leftover_data;
        samplecnt_t     leftover_samples;
        samplecnt_t     max_leftover_samples;
 
        float *        data_out;
        samplecnt_t     data_out_size;
 
        SRC_DATA       src_data;
        SRC_STATE*     src_state;
};
 
} // namespace
 
#endif // AUDIOGRAPHER_SR_CONVERTER_H