summaryrefslogtreecommitdiff
path: root/plugins/gme/game-music-emu-0.6.0/gme/Snes_Spc.h
diff options
context:
space:
mode:
Diffstat (limited to 'plugins/gme/game-music-emu-0.6.0/gme/Snes_Spc.h')
-rw-r--r--plugins/gme/game-music-emu-0.6.0/gme/Snes_Spc.h287
1 files changed, 0 insertions, 287 deletions
diff --git a/plugins/gme/game-music-emu-0.6.0/gme/Snes_Spc.h b/plugins/gme/game-music-emu-0.6.0/gme/Snes_Spc.h
deleted file mode 100644
index 188a2c21..00000000
--- a/plugins/gme/game-music-emu-0.6.0/gme/Snes_Spc.h
+++ /dev/null
@@ -1,287 +0,0 @@
-// SNES SPC-700 APU emulator
-
-// Game_Music_Emu 0.5.5
-#ifndef SNES_SPC_H
-#define SNES_SPC_H
-
-#include "Spc_Dsp.h"
-#include "blargg_endian.h"
-
-struct Snes_Spc {
-public:
- typedef BOOST::uint8_t uint8_t;
-
- // Must be called once before using
- blargg_err_t init();
-
- // Sample pairs generated per second
- enum { sample_rate = 32000 };
-
-// Emulator use
-
- // Sets IPL ROM data. Library does not include ROM data. Most SPC music files
- // don't need ROM, but a full emulator must provide this.
- enum { rom_size = 0x40 };
- void init_rom( uint8_t const rom [rom_size] );
-
- // Sets destination for output samples
- typedef short sample_t;
- void set_output( sample_t* out, int out_size );
-
- // Number of samples written to output since last set
- int sample_count() const;
-
- // Resets SPC to power-on state. This resets your output buffer, so you must
- // call set_output() after this.
- void reset();
-
- // Emulates pressing reset switch on SNES. This resets your output buffer, so
- // you must call set_output() after this.
- void soft_reset();
-
- // 1024000 SPC clocks per second, sample pair every 32 clocks
- typedef int time_t;
- enum { clock_rate = 1024000 };
- enum { clocks_per_sample = 32 };
-
- // Emulated port read/write at specified time
- enum { port_count = 4 };
- int read_port ( time_t, int port );
- void write_port( time_t, int port, int data );
-
- // Runs SPC to end_time and starts a new time frame at 0
- void end_frame( time_t end_time );
-
-// Sound control
-
- // Mutes voices corresponding to non-zero bits in mask (issues repeated KOFF events).
- // Reduces emulation accuracy.
- enum { voice_count = 8 };
- void mute_voices( int mask );
-
- // If true, prevents channels and global volumes from being phase-negated.
- // Only supported by fast DSP.
- void disable_surround( bool disable = true );
-
- // Sets tempo, where tempo_unit = normal, tempo_unit / 2 = half speed, etc.
- enum { tempo_unit = 0x100 };
- void set_tempo( int );
-
-// SPC music files
-
- // Loads SPC data into emulator
- enum { spc_min_file_size = 0x10180 };
- enum { spc_file_size = 0x10200 };
- blargg_err_t load_spc( void const* in, long size );
-
- // Clears echo region. Useful after loading an SPC as many have garbage in echo.
- void clear_echo();
-
- // Plays for count samples and write samples to out. Discards samples if out
- // is NULL. Count must be a multiple of 2 since output is stereo.
- blargg_err_t play( int count, sample_t* out );
-
- // Skips count samples. Several times faster than play() when using fast DSP.
- blargg_err_t skip( int count );
-
-// State save/load (only available with accurate DSP)
-
-#if !SPC_NO_COPY_STATE_FUNCS
- // Saves/loads state
- enum { state_size = 67 * 1024L }; // maximum space needed when saving
- typedef Spc_Dsp::copy_func_t copy_func_t;
- void copy_state( unsigned char** io, copy_func_t );
-
- // Writes minimal header to spc_out
- static void init_header( void* spc_out );
-
- // Saves emulator state as SPC file data. Writes spc_file_size bytes to spc_out.
- // Does not set up SPC header; use init_header() for that.
- void save_spc( void* spc_out );
-
- // Returns true if new key-on events occurred since last check. Useful for
- // trimming silence while saving an SPC.
- bool check_kon();
-#endif
-
-public:
- // TODO: document
- struct regs_t
- {
- int pc;
- int a;
- int x;
- int y;
- int psw;
- int sp;
- };
- regs_t& smp_regs() { return m.cpu_regs; }
-
- uint8_t* smp_ram() { return m.ram.ram; }
-
- void run_until( time_t t ) { run_until_( t ); }
-public:
- BLARGG_DISABLE_NOTHROW
-
- typedef BOOST::uint16_t uint16_t;
-
- // Time relative to m_spc_time. Speeds up code a bit by eliminating need to
- // constantly add m_spc_time to time from CPU. CPU uses time that ends at
- // 0 to eliminate reloading end time every instruction. It pays off.
- typedef int rel_time_t;
-
- struct Timer
- {
- rel_time_t next_time; // time of next event
- int prescaler;
- int period;
- int divider;
- int enabled;
- int counter;
- };
- enum { reg_count = 0x10 };
- enum { timer_count = 3 };
- enum { extra_size = Spc_Dsp::extra_size };
-
- enum { signature_size = 35 };
-
-private:
- Spc_Dsp dsp;
-
- #if SPC_LESS_ACCURATE
- static signed char const reg_times_ [256];
- signed char reg_times [256];
- #endif
-
- struct state_t
- {
- Timer timers [timer_count];
-
- uint8_t smp_regs [2] [reg_count];
-
- regs_t cpu_regs;
-
- rel_time_t dsp_time;
- time_t spc_time;
- bool echo_accessed;
-
- int tempo;
- int skipped_kon;
- int skipped_koff;
- const char* cpu_error;
-
- int extra_clocks;
- sample_t* buf_begin;
- sample_t const* buf_end;
- sample_t* extra_pos;
- sample_t extra_buf [extra_size];
-
- int rom_enabled;
- uint8_t rom [rom_size];
- uint8_t hi_ram [rom_size];
-
- unsigned char cycle_table [256];
-
- struct
- {
- // padding to neutralize address overflow
- union {
- uint8_t padding1 [0x100];
- uint16_t align; // makes compiler align data for 16-bit access
- } padding1 [1];
- uint8_t ram [0x10000];
- uint8_t padding2 [0x100];
- } ram;
- };
- state_t m;
-
- enum { rom_addr = 0xFFC0 };
-
- enum { skipping_time = 127 };
-
- // Value that padding should be filled with
- enum { cpu_pad_fill = 0xFF };
-
- enum {
- r_test = 0x0, r_control = 0x1,
- r_dspaddr = 0x2, r_dspdata = 0x3,
- r_cpuio0 = 0x4, r_cpuio1 = 0x5,
- r_cpuio2 = 0x6, r_cpuio3 = 0x7,
- r_f8 = 0x8, r_f9 = 0x9,
- r_t0target = 0xA, r_t1target = 0xB, r_t2target = 0xC,
- r_t0out = 0xD, r_t1out = 0xE, r_t2out = 0xF
- };
-
- void timers_loaded();
- void enable_rom( int enable );
- void reset_buf();
- void save_extra();
- void load_regs( uint8_t const in [reg_count] );
- void ram_loaded();
- void regs_loaded();
- void reset_time_regs();
- void reset_common( int timer_counter_init );
-
- Timer* run_timer_ ( Timer* t, rel_time_t );
- Timer* run_timer ( Timer* t, rel_time_t );
- int dsp_read ( rel_time_t );
- void dsp_write ( int data, rel_time_t );
- void cpu_write_smp_reg_( int data, rel_time_t, int addr );
- void cpu_write_smp_reg ( int data, rel_time_t, int addr );
- void cpu_write_high ( int data, int i, rel_time_t );
- void cpu_write ( int data, int addr, rel_time_t );
- int cpu_read_smp_reg ( int i, rel_time_t );
- int cpu_read ( int addr, rel_time_t );
- unsigned CPU_mem_bit ( uint8_t const* pc, rel_time_t );
-
- bool check_echo_access ( int addr );
- uint8_t* run_until_( time_t end_time );
-
- struct spc_file_t
- {
- char signature [signature_size];
- uint8_t has_id666;
- uint8_t version;
- uint8_t pcl, pch;
- uint8_t a;
- uint8_t x;
- uint8_t y;
- uint8_t psw;
- uint8_t sp;
- char text [212];
- uint8_t ram [0x10000];
- uint8_t dsp [128];
- uint8_t unused [0x40];
- uint8_t ipl_rom [0x40];
- };
-
- static char const signature [signature_size + 1];
-
- void save_regs( uint8_t out [reg_count] );
-};
-
-#include <assert.h>
-
-inline int Snes_Spc::sample_count() const { return (m.extra_clocks >> 5) * 2; }
-
-inline int Snes_Spc::read_port( time_t t, int port )
-{
- assert( (unsigned) port < port_count );
- return run_until_( t ) [port];
-}
-
-inline void Snes_Spc::write_port( time_t t, int port, int data )
-{
- assert( (unsigned) port < port_count );
- run_until_( t ) [0x10 + port] = data;
-}
-
-inline void Snes_Spc::mute_voices( int mask ) { dsp.mute_voices( mask ); }
-
-inline void Snes_Spc::disable_surround( bool disable ) { dsp.disable_surround( disable ); }
-
-#if !SPC_NO_COPY_STATE_FUNCS
-inline bool Snes_Spc::check_kon() { return dsp.check_kon(); }
-#endif
-
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-09 13:25:01 +0000