96 lines
2.3 KiB
C++
96 lines
2.3 KiB
C++
// T6W28_Snd_Emu
|
|
|
|
#ifndef SMS_APU_H
|
|
#define SMS_APU_H
|
|
|
|
namespace MDFN_IEN_NGP
|
|
{
|
|
|
|
typedef long sms_time_t; // clock cycle count
|
|
|
|
}
|
|
|
|
#include "T6W28_Oscs.h"
|
|
|
|
namespace MDFN_IEN_NGP
|
|
{
|
|
|
|
typedef struct
|
|
{
|
|
int32 sq_period[3];
|
|
int32 sq_phase[3];
|
|
uint32 noise_period;
|
|
uint32 noise_period_extra;
|
|
uint32 noise_shifter;
|
|
uint32 noise_tap;
|
|
|
|
int32 volume_left[4];
|
|
int32 volume_right[4];
|
|
uint8 latch_left, latch_right;
|
|
} T6W28_ApuState;
|
|
|
|
class T6W28_Apu {
|
|
public:
|
|
// Set overall volume of all oscillators, where 1.0 is full volume
|
|
void volume( double );
|
|
|
|
// Set treble equalization
|
|
void treble_eq( const blip_eq_t& );
|
|
|
|
// Outputs can be assigned to a single buffer for mono output, or to three
|
|
// buffers for stereo output (using Stereo_Buffer to do the mixing).
|
|
|
|
// Assign all oscillator outputs to specified buffer(s). If buffer
|
|
// is NULL, silences all oscillators.
|
|
void output( Blip_Buffer* mono );
|
|
void output( Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right );
|
|
|
|
// Assign single oscillator output to buffer(s). Valid indicies are 0 to 3,
|
|
// which refer to Square 1, Square 2, Square 3, and Noise. If buffer is NULL,
|
|
// silences oscillator.
|
|
enum { osc_count = 4 };
|
|
void osc_output( int index, Blip_Buffer* mono );
|
|
void osc_output( int index, Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right );
|
|
|
|
// Reset oscillators and internal state
|
|
void reset();
|
|
|
|
// Write to data port
|
|
void write_data_left( sms_time_t, int );
|
|
void write_data_right( sms_time_t, int );
|
|
|
|
// Run all oscillators up to specified time, end current frame, then
|
|
// start a new frame at time 0. Returns true if any oscillators added
|
|
// sound to one of the left/right buffers, false if they only added
|
|
// to the center buffer.
|
|
bool end_frame( sms_time_t );
|
|
|
|
void save_state(T6W28_ApuState*);
|
|
void load_state(const T6W28_ApuState*);
|
|
public:
|
|
T6W28_Apu();
|
|
~T6W28_Apu();
|
|
private:
|
|
// noncopyable
|
|
T6W28_Apu( const T6W28_Apu& );
|
|
T6W28_Apu& operator = ( const T6W28_Apu& );
|
|
|
|
T6W28_Osc* oscs [osc_count];
|
|
T6W28_Square squares [3];
|
|
T6W28_Square::Synth square_synth; // used by squares
|
|
sms_time_t last_time;
|
|
int latch_left, latch_right;
|
|
T6W28_Noise noise;
|
|
|
|
void run_until( sms_time_t );
|
|
};
|
|
|
|
inline void T6W28_Apu::output( Blip_Buffer* b ) { output( b, b, b ); }
|
|
|
|
inline void T6W28_Apu::osc_output( int i, Blip_Buffer* b ) { osc_output( i, b, b, b ); }
|
|
|
|
}
|
|
|
|
#endif
|
|
|