1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
// MSX computer KSS music file emulator
// Game_Music_Emu 0.5.5
#ifndef KSS_EMU_H
#define KSS_EMU_H
#include "gme.h"
#include "blargg_common.h"
#include "rom_data.h"
#include "multi_buffer.h"
#include "kss_scc_apu.h"
#include "z80_cpu.h"
#include "sms_apu.h"
#include "ay_apu.h"
#include "opl_apu.h"
#include "m3u_playlist.h"
#include "track_filter.h"
typedef int kss_time_t;
typedef int kss_addr_t;
typedef struct Z80_Cpu Kss_Cpu;
// Sound chip flags
enum {
sms_psg_flag = 1 << 0,
sms_fm_flag = 1 << 1,
msx_psg_flag = 1 << 2,
msx_scc_flag = 1 << 3,
msx_music_flag = 1 << 4,
msx_audio_flag = 1 << 5
};
enum { idle_addr = 0xFFFF };
enum { scc_enabled_true = 0xC000 };
#define mem_size (0x10000)
// KSS file header
enum { header_size = 0x20 };
enum { header_base_size = 0x10 };
enum { header_ext_size = header_size - header_base_size };
struct header_t
{
byte tag [4];
byte load_addr [2];
byte load_size [2];
byte init_addr [2];
byte play_addr [2];
byte first_bank;
byte bank_mode;
byte extra_header;
byte device_flags;
// KSSX extended data, if extra_header==0x10
byte data_size [4];
byte unused [4];
byte first_track [2];
byte last_track [2]; // if no extended data, we set this to 0xFF
byte psg_vol;
byte scc_vol;
byte msx_music_vol;
byte msx_audio_vol;
};
struct sms_t {
struct Sms_Apu psg;
struct Opl_Apu fm;
};
struct msx_t {
struct Ay_Apu psg;
struct Scc_Apu scc;
struct Opl_Apu music;
struct Opl_Apu audio;
};
struct Kss_Emu {
struct header_t header;
int chip_flags;
bool scc_accessed;
bool gain_updated;
unsigned scc_enabled; // 0 or 0xC000
int bank_count;
blip_time_t play_period;
blip_time_t next_play;
int ay_latch;
// general
int voice_count;
int const* voice_types;
int mute_mask_;
int tempo;
int gain;
int sample_rate;
// track-specific
int track_count;
int current_track;
int clock_rate_;
unsigned buf_changed_count;
// M3u Playlist
struct M3u_Playlist m3u;
struct setup_t tfilter;
struct Track_Filter track_filter;
struct sms_t sms;
struct msx_t msx;
Kss_Cpu cpu;
struct Multi_Buffer stereo_buf; // NULL if using custom buffer
struct Rom_Data rom;
byte unmapped_read [0x100];
byte unmapped_write [page_size];
byte ram [mem_size + cpu_padding];
};
// Basic functionality (see Gme_File.h for file loading/track info functions)
void Kss_init( struct Kss_Emu* this );
blargg_err_t Kss_load_mem( struct Kss_Emu* this, const void* data, long size );
blargg_err_t end_frame( struct Kss_Emu* this, kss_time_t );
// Set output sample rate. Must be called only once before loading file.
blargg_err_t Kss_set_sample_rate( struct Kss_Emu* this, int sample_rate );
// Start a track, where 0 is the first track. Also clears warning string.
blargg_err_t Kss_start_track( struct Kss_Emu* this, int track );
// Generate 'count' samples info 'buf'. Output is in stereo. Any emulation
// errors set warning string, and major errors also end track.
blargg_err_t Kss_play( struct Kss_Emu* this, int count, sample_t* buf );
// Track status/control
// Number of milliseconds (1000 msec = 1 second) played since beginning of track
int Track_tell( struct Kss_Emu* this );
// Seek to new time in track. Seeking backwards or far forward can take a while.
blargg_err_t Track_seek( struct Kss_Emu* this, int msec );
// Skip n samples
blargg_err_t Track_skip( struct Kss_Emu* this, int n );
// Set start time and length of track fade out. Once fade ends track_ended() returns
// true. Fade time can be changed while track is playing.
void Track_set_fade( struct Kss_Emu* this, int start_msec, int length_msec );
// True if a track has reached its end
static inline bool Track_ended( struct Kss_Emu* this )
{
return track_ended( &this->track_filter );
}
// Disables automatic end-of-track detection and skipping of silence at beginning
static inline void Track_ignore_silence( struct Kss_Emu* this, bool disable )
{
this->track_filter.silence_ignored_ = disable;
}
// Get track length in milliseconds
static inline int Track_get_length( struct Kss_Emu* this, int n )
{
int length = 0;
if ( (this->m3u.size > 0) && (n < this->m3u.size) ) {
struct entry_t* entry = &this->m3u.entries [n];
length = entry->length;
}
if ( length <= 0 )
length = 120 * 1000; /* 2 minutes */
return length;
}
// Sound customization
// Adjust song tempo, where 1.0 = normal, 0.5 = half speed, 2.0 = double speed.
// Track length as returned by track_info() assumes a tempo of 1.0.
void Sound_set_tempo( struct Kss_Emu* this, int t );
// Mute/unmute voice i, where voice 0 is first voice
void Sound_mute_voice( struct Kss_Emu* this, int index, bool mute );
// Set muting state of all voices at once using a bit mask, where -1 mutes them all,
// 0 unmutes them all, 0x01 mutes just the first voice, etc.
void Sound_mute_voices( struct Kss_Emu* this, int mask );
// Change overall output amplitude, where 1.0 results in minimal clamping.
// Must be called before set_sample_rate().
static inline void Sound_set_gain( struct Kss_Emu* this, int g )
{
assert( !this->sample_rate ); // you must set gain before setting sample rate
this->gain = g;
}
// Emulation (You shouldn't touch these
void cpu_write( struct Kss_Emu* this, kss_addr_t, int );
int cpu_in( struct Kss_Emu* this, kss_time_t, kss_addr_t );
void cpu_out( struct Kss_Emu* this, kss_time_t, kss_addr_t, int );
void cpu_write_( struct Kss_Emu* this, kss_addr_t addr, int data );
bool run_cpu( struct Kss_Emu* this, kss_time_t end );
void jsr( struct Kss_Emu* this, byte const addr [] );
static inline int sms_psg_enabled( struct Kss_Emu* this ) { return this->chip_flags & sms_psg_flag; }
static inline int sms_fm_enabled( struct Kss_Emu* this ) { return this->chip_flags & sms_fm_flag; }
static inline int msx_psg_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_psg_flag; }
static inline int msx_scc_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_scc_flag; }
static inline int msx_music_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_music_flag;}
static inline int msx_audio_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_audio_flag;}
#endif
|
