diff options
Diffstat (limited to 'plugins/gme/Game_Music_Emu-0.5.2/gme/Ay_Apu.h')
-rw-r--r-- | plugins/gme/Game_Music_Emu-0.5.2/gme/Ay_Apu.h | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/plugins/gme/Game_Music_Emu-0.5.2/gme/Ay_Apu.h b/plugins/gme/Game_Music_Emu-0.5.2/gme/Ay_Apu.h deleted file mode 100644 index 31956939..00000000 --- a/plugins/gme/Game_Music_Emu-0.5.2/gme/Ay_Apu.h +++ /dev/null @@ -1,107 +0,0 @@ -// AY-3-8910 sound chip emulator - -// Game_Music_Emu 0.5.2 -#ifndef AY_APU_H -#define AY_APU_H - -#include "blargg_common.h" -#include "Blip_Buffer.h" - -class Ay_Apu { -public: - // Set buffer to generate all sound into, or disable sound if NULL - void output( Blip_Buffer* ); - - // Reset sound chip - void reset(); - - // Write to register at specified time - enum { reg_count = 16 }; - void write( blip_time_t time, int addr, int data ); - - // Run sound to specified time, end current time frame, then start a new - // time frame at time 0. Time frames have no effect on emulation and each - // can be whatever length is convenient. - void end_frame( blip_time_t length ); - -// Additional features - - // Set sound output of specific oscillator to buffer, where index is - // 0, 1, or 2. If buffer is NULL, the specified oscillator is muted. - enum { osc_count = 3 }; - void osc_output( int index, Blip_Buffer* ); - - // Set overall volume (default is 1.0) - void volume( double ); - - // Set treble equalization (see documentation) - void treble_eq( blip_eq_t const& ); - -public: - Ay_Apu(); - typedef unsigned char byte; -private: - struct osc_t - { - blip_time_t period; - blip_time_t delay; - short last_amp; - short phase; - Blip_Buffer* output; - } oscs [osc_count]; - blip_time_t last_time; - byte latch; - byte regs [reg_count]; - - struct { - blip_time_t delay; - blargg_ulong lfsr; - } noise; - - struct { - blip_time_t delay; - byte const* wave; - int pos; - byte modes [8] [48]; // values already passed through volume table - } env; - - void run_until( blip_time_t ); - void write_data_( int addr, int data ); -public: - enum { amp_range = 255 }; - Blip_Synth<blip_good_quality,1> synth_; -}; - -inline void Ay_Apu::volume( double v ) { synth_.volume( 0.7 / osc_count / amp_range * v ); } - -inline void Ay_Apu::treble_eq( blip_eq_t const& eq ) { synth_.treble_eq( eq ); } - -inline void Ay_Apu::write( blip_time_t time, int addr, int data ) -{ - run_until( time ); - write_data_( addr, data ); -} - -inline void Ay_Apu::osc_output( int i, Blip_Buffer* buf ) -{ - assert( (unsigned) i < osc_count ); - oscs [i].output = buf; -} - -inline void Ay_Apu::output( Blip_Buffer* buf ) -{ - osc_output( 0, buf ); - osc_output( 1, buf ); - osc_output( 2, buf ); -} - -inline void Ay_Apu::end_frame( blip_time_t time ) -{ - if ( time > last_time ) - run_until( time ); - - assert( last_time >= time ); - last_time -= time; -} - -#endif |