mirror of
https://github.com/ZDoom/gzdoom.git
synced 2024-12-25 03:51:05 +00:00
a8de4fc2da
everything that was new for XP. - Swapped snes_spc out for the full Game Music Emu library. SVN r1631 (trunk)
83 lines
1.4 KiB
C
83 lines
1.4 KiB
C
// Private oscillators used by Gb_Apu
|
|
|
|
// Gb_Snd_Emu 0.1.5
|
|
#ifndef GB_OSCS_H
|
|
#define GB_OSCS_H
|
|
|
|
#include "blargg_common.h"
|
|
#include "Blip_Buffer.h"
|
|
|
|
struct Gb_Osc
|
|
{
|
|
enum { trigger = 0x80 };
|
|
enum { len_enabled_mask = 0x40 };
|
|
|
|
Blip_Buffer* outputs [4]; // NULL, right, left, center
|
|
Blip_Buffer* output;
|
|
int output_select;
|
|
BOOST::uint8_t* regs; // osc's 5 registers
|
|
|
|
int delay;
|
|
int last_amp;
|
|
int volume;
|
|
int length;
|
|
int enabled;
|
|
|
|
void reset();
|
|
void clock_length();
|
|
int frequency() const { return (regs [4] & 7) * 0x100 + regs [3]; }
|
|
};
|
|
|
|
struct Gb_Env : Gb_Osc
|
|
{
|
|
int env_delay;
|
|
|
|
void reset();
|
|
void clock_envelope();
|
|
bool write_register( int, int );
|
|
};
|
|
|
|
struct Gb_Square : Gb_Env
|
|
{
|
|
enum { period_mask = 0x70 };
|
|
enum { shift_mask = 0x07 };
|
|
|
|
typedef Blip_Synth<blip_good_quality,1> Synth;
|
|
Synth const* synth;
|
|
int sweep_delay;
|
|
int sweep_freq;
|
|
int phase;
|
|
|
|
void reset();
|
|
void clock_sweep();
|
|
void run( blip_time_t, blip_time_t, int playing );
|
|
};
|
|
|
|
struct Gb_Noise : Gb_Env
|
|
{
|
|
typedef Blip_Synth<blip_med_quality,1> Synth;
|
|
Synth const* synth;
|
|
unsigned bits;
|
|
|
|
void run( blip_time_t, blip_time_t, int playing );
|
|
};
|
|
|
|
struct Gb_Wave : Gb_Osc
|
|
{
|
|
typedef Blip_Synth<blip_med_quality,1> Synth;
|
|
Synth const* synth;
|
|
int wave_pos;
|
|
enum { wave_size = 32 };
|
|
BOOST::uint8_t wave [wave_size];
|
|
|
|
void write_register( int, int );
|
|
void run( blip_time_t, blip_time_t, int playing );
|
|
};
|
|
|
|
inline void Gb_Env::reset()
|
|
{
|
|
env_delay = 0;
|
|
Gb_Osc::reset();
|
|
}
|
|
|
|
#endif
|