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author | Sean Bartell <wingedtachikoma@gmail.com> | 2011-06-25 21:32:25 -0400 |
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committer | Nils Wallménius <nils@rockbox.org> | 2012-04-25 22:13:20 +0200 |
commit | f40bfc9267b13b54e6379dfe7539447662879d24 (patch) | |
tree | 9b20069d5e62809ff434061ad730096836f916f2 /lib/rbcodec/codecs/libgme/kss_emu.h | |
parent | a0009907de7a0107d49040d8a180f140e2eff299 (diff) | |
download | rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.tar.gz rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.zip |
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
Diffstat (limited to 'lib/rbcodec/codecs/libgme/kss_emu.h')
-rw-r--r-- | lib/rbcodec/codecs/libgme/kss_emu.h | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libgme/kss_emu.h b/lib/rbcodec/codecs/libgme/kss_emu.h new file mode 100644 index 0000000000..382e4b807b --- /dev/null +++ b/lib/rbcodec/codecs/libgme/kss_emu.h | |||
@@ -0,0 +1,223 @@ | |||
1 | // MSX computer KSS music file emulator | ||
2 | |||
3 | // Game_Music_Emu 0.5.5 | ||
4 | #ifndef KSS_EMU_H | ||
5 | #define KSS_EMU_H | ||
6 | |||
7 | #include "gme.h" | ||
8 | #include "blargg_common.h" | ||
9 | |||
10 | #include "rom_data.h" | ||
11 | #include "multi_buffer.h" | ||
12 | |||
13 | #include "kss_scc_apu.h" | ||
14 | #include "z80_cpu.h" | ||
15 | #include "sms_apu.h" | ||
16 | #include "ay_apu.h" | ||
17 | #include "opl_apu.h" | ||
18 | #include "m3u_playlist.h" | ||
19 | #include "track_filter.h" | ||
20 | |||
21 | typedef int kss_time_t; | ||
22 | typedef int kss_addr_t; | ||
23 | typedef struct Z80_Cpu Kss_Cpu; | ||
24 | |||
25 | // Sound chip flags | ||
26 | enum { | ||
27 | sms_psg_flag = 1 << 0, | ||
28 | sms_fm_flag = 1 << 1, | ||
29 | msx_psg_flag = 1 << 2, | ||
30 | msx_scc_flag = 1 << 3, | ||
31 | msx_music_flag = 1 << 4, | ||
32 | msx_audio_flag = 1 << 5 | ||
33 | }; | ||
34 | |||
35 | enum { idle_addr = 0xFFFF }; | ||
36 | enum { scc_enabled_true = 0xC000 }; | ||
37 | enum { mem_size = 0x10000 }; | ||
38 | |||
39 | // KSS file header | ||
40 | enum { header_size = 0x20 }; | ||
41 | enum { header_base_size = 0x10 }; | ||
42 | enum { header_ext_size = header_size - header_base_size }; | ||
43 | |||
44 | struct header_t | ||
45 | { | ||
46 | byte tag [4]; | ||
47 | byte load_addr [2]; | ||
48 | byte load_size [2]; | ||
49 | byte init_addr [2]; | ||
50 | byte play_addr [2]; | ||
51 | byte first_bank; | ||
52 | byte bank_mode; | ||
53 | byte extra_header; | ||
54 | byte device_flags; | ||
55 | |||
56 | // KSSX extended data, if extra_header==0x10 | ||
57 | byte data_size [4]; | ||
58 | byte unused [4]; | ||
59 | byte first_track [2]; | ||
60 | byte last_track [2]; // if no extended data, we set this to 0xFF | ||
61 | byte psg_vol; | ||
62 | byte scc_vol; | ||
63 | byte msx_music_vol; | ||
64 | byte msx_audio_vol; | ||
65 | }; | ||
66 | |||
67 | struct sms_t { | ||
68 | struct Sms_Apu psg; | ||
69 | struct Opl_Apu fm; | ||
70 | }; | ||
71 | |||
72 | struct msx_t { | ||
73 | struct Ay_Apu psg; | ||
74 | struct Scc_Apu scc; | ||
75 | struct Opl_Apu music; | ||
76 | struct Opl_Apu audio; | ||
77 | }; | ||
78 | |||
79 | struct Kss_Emu { | ||
80 | struct header_t header; | ||
81 | |||
82 | int chip_flags; | ||
83 | bool scc_accessed; | ||
84 | bool gain_updated; | ||
85 | |||
86 | unsigned scc_enabled; // 0 or 0xC000 | ||
87 | int bank_count; | ||
88 | |||
89 | blip_time_t play_period; | ||
90 | blip_time_t next_play; | ||
91 | int ay_latch; | ||
92 | |||
93 | // general | ||
94 | int voice_count; | ||
95 | int const* voice_types; | ||
96 | int mute_mask_; | ||
97 | int tempo; | ||
98 | int gain; | ||
99 | |||
100 | int sample_rate; | ||
101 | |||
102 | // track-specific | ||
103 | int track_count; | ||
104 | int current_track; | ||
105 | |||
106 | int clock_rate_; | ||
107 | unsigned buf_changed_count; | ||
108 | |||
109 | // M3u Playlist | ||
110 | struct M3u_Playlist m3u; | ||
111 | |||
112 | struct setup_t tfilter; | ||
113 | struct Track_Filter track_filter; | ||
114 | |||
115 | struct sms_t sms; | ||
116 | struct msx_t msx; | ||
117 | |||
118 | Kss_Cpu cpu; | ||
119 | struct Multi_Buffer stereo_buf; // NULL if using custom buffer | ||
120 | struct Rom_Data rom; | ||
121 | |||
122 | byte unmapped_read [0x100]; | ||
123 | byte unmapped_write [page_size]; | ||
124 | byte ram [mem_size + cpu_padding]; | ||
125 | }; | ||
126 | |||
127 | // Basic functionality (see Gme_File.h for file loading/track info functions) | ||
128 | |||
129 | void Kss_init( struct Kss_Emu* this ); | ||
130 | blargg_err_t Kss_load_mem( struct Kss_Emu* this, const void* data, long size ); | ||
131 | blargg_err_t end_frame( struct Kss_Emu* this, kss_time_t ); | ||
132 | |||
133 | // Set output sample rate. Must be called only once before loading file. | ||
134 | blargg_err_t Kss_set_sample_rate( struct Kss_Emu* this, int sample_rate ); | ||
135 | |||
136 | // Start a track, where 0 is the first track. Also clears warning string. | ||
137 | blargg_err_t Kss_start_track( struct Kss_Emu* this, int track ); | ||
138 | |||
139 | // Generate 'count' samples info 'buf'. Output is in stereo. Any emulation | ||
140 | // errors set warning string, and major errors also end track. | ||
141 | blargg_err_t Kss_play( struct Kss_Emu* this, int count, sample_t* buf ); | ||
142 | |||
143 | // Track status/control | ||
144 | |||
145 | // Number of milliseconds (1000 msec = 1 second) played since beginning of track | ||
146 | int Track_tell( struct Kss_Emu* this ); | ||
147 | |||
148 | // Seek to new time in track. Seeking backwards or far forward can take a while. | ||
149 | blargg_err_t Track_seek( struct Kss_Emu* this, int msec ); | ||
150 | |||
151 | // Skip n samples | ||
152 | blargg_err_t Track_skip( struct Kss_Emu* this, int n ); | ||
153 | |||
154 | // Set start time and length of track fade out. Once fade ends track_ended() returns | ||
155 | // true. Fade time can be changed while track is playing. | ||
156 | void Track_set_fade( struct Kss_Emu* this, int start_msec, int length_msec ); | ||
157 | |||
158 | // True if a track has reached its end | ||
159 | static inline bool Track_ended( struct Kss_Emu* this ) | ||
160 | { | ||
161 | return track_ended( &this->track_filter ); | ||
162 | } | ||
163 | |||
164 | // Disables automatic end-of-track detection and skipping of silence at beginning | ||
165 | static inline void Track_ignore_silence( struct Kss_Emu* this, bool disable ) | ||
166 | { | ||
167 | this->track_filter.silence_ignored_ = disable; | ||
168 | } | ||
169 | |||
170 | // Get track length in milliseconds | ||
171 | static inline int Track_get_length( struct Kss_Emu* this, int n ) | ||
172 | { | ||
173 | int length = 0; | ||
174 | |||
175 | if ( (this->m3u.size > 0) && (n < this->m3u.size) ) { | ||
176 | struct entry_t* entry = &this->m3u.entries [n]; | ||
177 | length = entry->length; | ||
178 | } | ||
179 | |||
180 | if ( length <= 0 ) | ||
181 | length = 120 * 1000; /* 2 minutes */ | ||
182 | |||
183 | return length; | ||
184 | } | ||
185 | |||
186 | // Sound customization | ||
187 | |||
188 | // Adjust song tempo, where 1.0 = normal, 0.5 = half speed, 2.0 = double speed. | ||
189 | // Track length as returned by track_info() assumes a tempo of 1.0. | ||
190 | void Sound_set_tempo( struct Kss_Emu* this, int t ); | ||
191 | |||
192 | // Mute/unmute voice i, where voice 0 is first voice | ||
193 | void Sound_mute_voice( struct Kss_Emu* this, int index, bool mute ); | ||
194 | |||
195 | // Set muting state of all voices at once using a bit mask, where -1 mutes them all, | ||
196 | // 0 unmutes them all, 0x01 mutes just the first voice, etc. | ||
197 | void Sound_mute_voices( struct Kss_Emu* this, int mask ); | ||
198 | |||
199 | // Change overall output amplitude, where 1.0 results in minimal clamping. | ||
200 | // Must be called before set_sample_rate(). | ||
201 | static inline void Sound_set_gain( struct Kss_Emu* this, int g ) | ||
202 | { | ||
203 | assert( !this->sample_rate ); // you must set gain before setting sample rate | ||
204 | this->gain = g; | ||
205 | } | ||
206 | |||
207 | // Emulation (You shouldn't touch these | ||
208 | void cpu_write( struct Kss_Emu* this, kss_addr_t, int ); | ||
209 | int cpu_in( struct Kss_Emu* this, kss_time_t, kss_addr_t ); | ||
210 | void cpu_out( struct Kss_Emu* this, kss_time_t, kss_addr_t, int ); | ||
211 | |||
212 | void cpu_write_( struct Kss_Emu* this, kss_addr_t addr, int data ); | ||
213 | bool run_cpu( struct Kss_Emu* this, kss_time_t end ); | ||
214 | void jsr( struct Kss_Emu* this, byte const addr [] ); | ||
215 | |||
216 | static inline int sms_psg_enabled( struct Kss_Emu* this ) { return this->chip_flags & sms_psg_flag; } | ||
217 | static inline int sms_fm_enabled( struct Kss_Emu* this ) { return this->chip_flags & sms_fm_flag; } | ||
218 | static inline int msx_psg_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_psg_flag; } | ||
219 | static inline int msx_scc_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_scc_flag; } | ||
220 | static inline int msx_music_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_music_flag;} | ||
221 | static inline int msx_audio_enabled( struct Kss_Emu* this ) { return this->chip_flags & msx_audio_flag;} | ||
222 | |||
223 | #endif | ||