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// Combination of Fir_Resampler and Stereo_Buffer mixing. Used by Sega FM emulators.
// Game_Music_Emu 0.6-pre
#ifndef DUAL_RESAMPLER_H
#define DUAL_RESAMPLER_H
#include "Multi_Buffer.h"
#if GME_VGM_FAST_RESAMPLER
#include "Downsampler.h"
typedef Downsampler Dual_Resampler_Downsampler;
#else
#include "Fir_Resampler.h"
typedef Fir_Resampler_Norm Dual_Resampler_Downsampler;
#endif
class Dual_Resampler {
public:
typedef short dsample_t;
blargg_err_t setup( double oversample, double rolloff, double gain );
double rate() const { return resampler.rate(); }
blargg_err_t reset( int max_pairs );
void resize( int pairs_per_frame );
void clear();
void dual_play( int count, dsample_t out [], Stereo_Buffer& );
blargg_callback<int (*)( void*, blip_time_t, int, dsample_t* )> set_callback;
// Implementation
public:
Dual_Resampler();
~Dual_Resampler();
private:
enum { gain_bits = 14 };
blargg_vector<dsample_t> sample_buf;
int sample_buf_size;
int oversamples_per_frame;
int buf_pos;
int resampler_size;
int gain_;
Dual_Resampler_Downsampler resampler;
void mix_samples( Stereo_Buffer&, dsample_t []);
void mix_mono( Stereo_Buffer&, dsample_t []);
void mix_stereo( Stereo_Buffer&, dsample_t []);
void play_frame_( Stereo_Buffer&, dsample_t []);
};
inline blargg_err_t Dual_Resampler::setup( double oversample, double rolloff, double gain )
{
gain_ = (int) ((1 << gain_bits) * gain);
return resampler.set_rate( oversample );
}
#endif
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