83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
// Super Nintendo SPC music file emulator
|
|
|
|
// Game_Music_Emu 0.6.0
|
|
#ifndef SPC_EMU_H
|
|
#define SPC_EMU_H
|
|
|
|
#include "Fir_Resampler.h"
|
|
#include "Music_Emu.h"
|
|
#include "Snes_Spc.h"
|
|
#include "Spc_Filter.h"
|
|
|
|
class Spc_Emu : public Music_Emu {
|
|
public:
|
|
// The Super Nintendo hardware samples at 32kHz. Other sample rates are
|
|
// handled by resampling the 32kHz output; emulation accuracy is not affected.
|
|
enum { native_sample_rate = 32000 };
|
|
|
|
// SPC file header
|
|
enum { header_size = 0x100 };
|
|
struct header_t
|
|
{
|
|
char tag [35];
|
|
byte format;
|
|
byte version;
|
|
byte pc [2];
|
|
byte a, x, y, psw, sp;
|
|
byte unused [2];
|
|
char song [32];
|
|
char game [32];
|
|
char dumper [16];
|
|
char comment [32];
|
|
byte date [11];
|
|
byte len_secs [3];
|
|
byte fade_msec [4];
|
|
char author [32]; // sometimes first char should be skipped (see official SPC spec)
|
|
byte mute_mask;
|
|
byte emulator;
|
|
byte unused2 [46];
|
|
};
|
|
|
|
// Header for currently loaded file
|
|
header_t const& header() const { return *(header_t const*) file_data; }
|
|
|
|
// Prevents channels and global volumes from being phase-negated
|
|
void disable_surround( bool disable = true );
|
|
|
|
static gme_type_t static_type() { return gme_spc_type; }
|
|
|
|
public:
|
|
// deprecated
|
|
using Music_Emu::load;
|
|
blargg_err_t load( header_t const& h, Data_Reader& in ) // use Remaining_Reader
|
|
{ return load_remaining_( &h, sizeof h, in ); }
|
|
byte const* trailer() const; // use track_info()
|
|
long trailer_size() const;
|
|
|
|
public:
|
|
Spc_Emu();
|
|
~Spc_Emu();
|
|
protected:
|
|
blargg_err_t load_mem_( byte const*, long );
|
|
blargg_err_t track_info_( track_info_t*, int track ) const;
|
|
blargg_err_t set_sample_rate_( long );
|
|
blargg_err_t start_track_( int );
|
|
blargg_err_t play_( long, sample_t* );
|
|
blargg_err_t skip_( long );
|
|
void mute_voices_( int );
|
|
void set_tempo_( double );
|
|
void enable_accuracy_( bool );
|
|
private:
|
|
byte const* file_data;
|
|
long file_size;
|
|
Fir_Resampler<24> resampler;
|
|
SPC_Filter filter;
|
|
Snes_Spc apu;
|
|
|
|
blargg_err_t play_and_filter( long count, sample_t out [] );
|
|
};
|
|
|
|
inline void Spc_Emu::disable_surround( bool b ) { apu.disable_surround( b ); }
|
|
|
|
#endif
|