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// Combination of Fir_Resampler and Blip_Buffer mixing. Used by Sega FM emulators.
// Game_Music_Emu 0.5.5
#ifndef DUAL_RESAMPLER_H
#define DUAL_RESAMPLER_H
#include "Fir_Resampler.h"
#include "Blip_Buffer.h"
class Dual_Resampler {
public:
Dual_Resampler();
virtual ~Dual_Resampler();
typedef short dsample_t;
double setup( double oversample, double rolloff, double gain );
blargg_err_t reset( int max_pairs );
void resize( int pairs_per_frame );
void clear();
void dual_play( long count, dsample_t* out, Blip_Buffer& );
protected:
virtual int play_frame( blip_time_t, int pcm_count, dsample_t* pcm_out ) = 0;
private:
blargg_vector<dsample_t> sample_buf;
int sample_buf_size;
int oversamples_per_frame;
int buf_pos;
int resampler_size;
Fir_Resampler<12> resampler;
void mix_samples( Blip_Buffer&, dsample_t* );
void play_frame_( Blip_Buffer&, dsample_t* );
};
inline double Dual_Resampler::setup( double oversample, double rolloff, double gain )
{
return resampler.time_ratio( oversample, rolloff, gain * 0.5 );
}
inline void Dual_Resampler::clear()
{
buf_pos = sample_buf_size;
resampler.clear();
}
#endif
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