mirror of
https://github.com/ZDoom/raze-gles.git
synced 2024-12-29 13:00:43 +00:00
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
|
// Combination of Fir_Resampler and Blip_Buffer mixing. Used by Sega FM emulators.
|
||
|
|
|
||
|
|
// Game_Music_Emu https://bitbucket.org/mpyne/game-music-emu/
|
||
|
|
#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
|