diff options
Diffstat (limited to 'source/apu_blargg.h')
| -rw-r--r-- | source/apu_blargg.h | 68 |
1 files changed, 29 insertions, 39 deletions
diff --git a/source/apu_blargg.h b/source/apu_blargg.h index 6c44acc..f2a89ec 100644 --- a/source/apu_blargg.h +++ b/source/apu_blargg.h @@ -82,36 +82,25 @@ typedef void (*dsp_copy_func_t)( unsigned char** io, void* state, size_t ); typedef struct { - /* decoded samples (twice the size to simplify wrap handling) */ - int buf [BRR_BUF_SIZE_X2]; - /* place in buffer where next samples will be decoded */ - int buf_pos; - /* relative fractional position in sample (0x1000 = 1.0) */ - int interp_pos; - /* address of current BRR block */ - int brr_addr; - /* current decoding offset in BRR block */ - int brr_offset; - /* pointer to voice's DSP registers */ - uint8_t* regs; - /* bitmask for voice: 0x01 for voice 0, 0x02 for voice 1, etc. */ - int vbit; - /* KON delay/current setup phase */ - int kon_delay; - int env_mode; - /* current envelope level */ - int env; - /* used by GAIN mode 7, very obscure quirk */ - int hidden_env; - uint8_t t_envx_out; + int buf [BRR_BUF_SIZE_X2]; // decoded samples (twice the size to simplify wrap handling) + int buf_pos; // place in buffer where next samples will be decoded + int interp_pos; // relative fractional position in sample (0x1000 = 1.0) + int brr_addr; // address of current BRR block + int brr_offset; // current decoding offset in BRR block + uint8_t* regs; // pointer to voice's DSP registers + int vbit; // bitmask for voice: 0x01 for voice 0, 0x02 for voice 1, etc. + int kon_delay; // KON delay/current setup phase + int env_mode; + int env; // current envelope level + int hidden_env; // used by GAIN mode 7, very obscure quirk + uint8_t t_envx_out; } dsp_voice_t; typedef struct { uint8_t regs [REGISTER_COUNT]; - /* Echo history keeps most recent 8 samples - (twice the size to simplify wrap handling) */ + /* Echo history keeps most recent 8 samples (twice the size to simplify wrap handling) */ int echo_hist [ECHO_HIST_SIZE_X2] [2]; @@ -126,7 +115,7 @@ typedef struct int phase; /* next clock cycle to run (0-31) */ /* Hidden registers also written to when main register is written to */ - int new_kon; + int new_kon; uint8_t endx_buf; uint8_t envx_buf; uint8_t outx_buf; @@ -168,10 +157,11 @@ typedef struct int16_t* out; int16_t* out_end; int16_t* out_begin; - int16_t extra [EXTRA_SIZE]; + int16_t extra [EXTRA_SIZE]; - int rom_enabled; - uint8_t *rom, *hi_ram; + int rom_enabled; + uint8_t *rom; + uint8_t *hi_ram; } dsp_state_t; #if !SPC_NO_COPY_STATE_FUNCS @@ -254,20 +244,20 @@ typedef struct int sp; } cpu_regs; - int dsp_time; - int spc_time; + int dsp_time; + int spc_time; - int tempo; + int tempo; - int extra_clocks; - int16_t* buf_begin; + int extra_clocks; + int16_t* buf_begin; int16_t* buf_end; - int16_t* extra_pos; - int16_t extra_buf [EXTRA_SIZE]; + int16_t* extra_pos; + int16_t extra_buf [EXTRA_SIZE]; - int rom_enabled; - uint8_t rom [ROM_SIZE]; - uint8_t hi_ram [ROM_SIZE]; + int rom_enabled; + uint8_t rom [ROM_SIZE]; + uint8_t hi_ram [ROM_SIZE]; unsigned char cycle_table [256]; @@ -275,7 +265,7 @@ typedef struct { /* padding to neutralize address overflow */ union { - uint8_t padding1 [0x100]; + uint8_t padding1 [0x100]; uint16_t align; /* makes compiler align data for 16-bit access */ } padding1 [1]; uint8_t ram [0x10000]; |