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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/hes_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/hes_emu.h')
-rw-r--r-- | lib/rbcodec/codecs/libgme/hes_emu.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libgme/hes_emu.h b/lib/rbcodec/codecs/libgme/hes_emu.h new file mode 100644 index 0000000000..a1dd048498 --- /dev/null +++ b/lib/rbcodec/codecs/libgme/hes_emu.h | |||
@@ -0,0 +1,195 @@ | |||
1 | // TurboGrafx-16/PC Engine HES music file emulator | ||
2 | |||
3 | // Game_Music_Emu 0.5.2 | ||
4 | #ifndef HES_EMU_H | ||
5 | #define HES_EMU_H | ||
6 | |||
7 | #include "blargg_source.h" | ||
8 | |||
9 | #include "multi_buffer.h" | ||
10 | #include "rom_data.h" | ||
11 | #include "hes_apu.h" | ||
12 | #include "hes_apu_adpcm.h" | ||
13 | #include "hes_cpu.h" | ||
14 | #include "m3u_playlist.h" | ||
15 | #include "track_filter.h" | ||
16 | |||
17 | // HES file header | ||
18 | enum { info_offset = 0x20 }; | ||
19 | enum { header_size = 0x20 }; | ||
20 | struct header_t | ||
21 | { | ||
22 | byte tag [4]; | ||
23 | byte vers; | ||
24 | byte first_track; | ||
25 | byte init_addr [2]; | ||
26 | byte banks [8]; | ||
27 | byte data_tag [4]; | ||
28 | byte size [4]; | ||
29 | byte addr [4]; | ||
30 | byte unused [4]; | ||
31 | }; | ||
32 | |||
33 | |||
34 | struct timer_t { | ||
35 | hes_time_t last_time; | ||
36 | int count; | ||
37 | int load; | ||
38 | int raw_load; | ||
39 | byte enabled; | ||
40 | byte fired; | ||
41 | }; | ||
42 | |||
43 | struct vdp_t { | ||
44 | hes_time_t next_vbl; | ||
45 | byte latch; | ||
46 | byte control; | ||
47 | }; | ||
48 | |||
49 | struct irq_t { | ||
50 | hes_time_t timer; | ||
51 | hes_time_t vdp; | ||
52 | byte disables; | ||
53 | }; | ||
54 | |||
55 | struct Hes_Emu { | ||
56 | hes_time_t play_period; | ||
57 | int timer_base; | ||
58 | |||
59 | struct timer_t timer; | ||
60 | struct vdp_t vdp; | ||
61 | struct irq_t irq; | ||
62 | |||
63 | // Sound | ||
64 | int clock_rate_; | ||
65 | int sample_rate_; | ||
66 | unsigned buf_changed_count; | ||
67 | int voice_count_; | ||
68 | int const* voice_types_; | ||
69 | int mute_mask_; | ||
70 | int tempo_; | ||
71 | int gain_; | ||
72 | |||
73 | // track-specific | ||
74 | byte track_count; | ||
75 | int current_track_; | ||
76 | |||
77 | // Larger files at the end | ||
78 | // Header for currently loaded file | ||
79 | struct header_t header; | ||
80 | |||
81 | // M3u Playlist | ||
82 | struct M3u_Playlist m3u; | ||
83 | |||
84 | struct setup_t tfilter; | ||
85 | struct Track_Filter track_filter; | ||
86 | |||
87 | // Hes Cpu | ||
88 | struct Hes_Cpu cpu; | ||
89 | struct Rom_Data rom; | ||
90 | |||
91 | struct Hes_Apu apu; | ||
92 | struct Hes_Apu_Adpcm adpcm; | ||
93 | |||
94 | struct Multi_Buffer stereo_buf; | ||
95 | |||
96 | // rom & ram | ||
97 | byte* write_pages [page_count + 1]; // 0 if unmapped or I/O space | ||
98 | byte ram [page_size]; | ||
99 | byte sgx [3 * page_size + cpu_padding]; | ||
100 | }; | ||
101 | |||
102 | |||
103 | // Basic functionality | ||
104 | // Initializes Hes_Emu structure | ||
105 | void Hes_init( struct Hes_Emu* this ); | ||
106 | |||
107 | // Stops (clear) Hes_Emu structure | ||
108 | void Hes_stop( struct Hes_Emu* this ); | ||
109 | |||
110 | // Loads a file from memory | ||
111 | blargg_err_t Hes_load_mem( struct Hes_Emu* this, void* data, long size ); | ||
112 | |||
113 | // Set output sample rate. Must be called only once before loading file. | ||
114 | blargg_err_t Hes_set_sample_rate( struct Hes_Emu* this, int sample_rate ); | ||
115 | |||
116 | // Start a track, where 0 is the first track. Also clears warning string. | ||
117 | blargg_err_t Hes_start_track( struct Hes_Emu* this, int ); | ||
118 | |||
119 | // Generate 'count' samples info 'buf'. Output is in stereo. Any emulation | ||
120 | // errors set warning string, and major errors also end track. | ||
121 | blargg_err_t Hes_play( struct Hes_Emu* this, int count, sample_t* buf ); | ||
122 | |||
123 | // Track status/control | ||
124 | // Number of milliseconds (1000 msec = 1 second) played since ning of track | ||
125 | int Track_tell( struct Hes_Emu* this ); | ||
126 | |||
127 | // Seek to new time in track. Seeking backwards or far forward can take a while. | ||
128 | blargg_err_t Track_seek( struct Hes_Emu* this, int msec ); | ||
129 | |||
130 | // Skip n samples | ||
131 | blargg_err_t Track_skip( struct Hes_Emu* this, int n ); | ||
132 | |||
133 | // Set start time and length of track fade out. Once fade ends track_ended() returns | ||
134 | // true. Fade time can be changed while track is playing. | ||
135 | void Track_set_fade( struct Hes_Emu* this, int start_msec, int length_msec ); | ||
136 | |||
137 | // True if a track has reached its end | ||
138 | static inline bool Track_ended( struct Hes_Emu* this ) | ||
139 | { | ||
140 | return track_ended( &this->track_filter ); | ||
141 | } | ||
142 | |||
143 | // Disables automatic end-of-track detection and skipping of silence at beginning | ||
144 | static inline void Track_ignore_silence( struct Hes_Emu* this, bool disable ) | ||
145 | { | ||
146 | this->track_filter.silence_ignored_ = disable; | ||
147 | } | ||
148 | |||
149 | // Get track length in milliseconds | ||
150 | static inline int Track_get_length( struct Hes_Emu* this, int n ) | ||
151 | { | ||
152 | int length = 120 * 1000; /* 2 minutes */ | ||
153 | if ( (this->m3u.size > 0) && (n < this->m3u.size) ) { | ||
154 | struct entry_t* entry = &this->m3u.entries [n]; | ||
155 | length = entry->length; | ||
156 | } | ||
157 | |||
158 | return length; | ||
159 | } | ||
160 | |||
161 | |||
162 | // Sound customization | ||
163 | // Adjust song tempo, where 1.0 = normal, 0.5 = half speed, 2.0 = double speed. | ||
164 | // Track length as returned by track_info() assumes a tempo of 1.0. | ||
165 | void Sound_set_tempo( struct Hes_Emu* this, int ); | ||
166 | |||
167 | // Mute/unmute voice i, where voice 0 is first voice | ||
168 | void Sound_mute_voice( struct Hes_Emu* this, int index, bool mute ); | ||
169 | |||
170 | // Set muting state of all voices at once using a bit mask, where -1 mutes them all, | ||
171 | // 0 unmutes them all, 0x01 mutes just the first voice, etc. | ||
172 | void Sound_mute_voices( struct Hes_Emu* this, int mask ); | ||
173 | |||
174 | // Change overall output amplitude, where 1.0 results in minimal clamping. | ||
175 | // Must be called before set_sample_rate(). | ||
176 | static inline void Sound_set_gain( struct Hes_Emu* this, int g ) | ||
177 | { | ||
178 | assert( !this->sample_rate_ ); // you must set gain before setting sample rate | ||
179 | this->gain_ = g; | ||
180 | } | ||
181 | |||
182 | // Emulation (You shouldn't touch these) | ||
183 | |||
184 | void irq_changed( struct Hes_Emu* this ); | ||
185 | void run_until( struct Hes_Emu* this, hes_time_t ); | ||
186 | bool run_cpu( struct Hes_Emu* this, hes_time_t end ); | ||
187 | int read_mem_( struct Hes_Emu* this, hes_addr_t ); | ||
188 | int read_mem( struct Hes_Emu* this, hes_addr_t ); | ||
189 | void write_mem_( struct Hes_Emu* this, hes_addr_t, int data ); | ||
190 | void write_mem( struct Hes_Emu* this, hes_addr_t, int ); | ||
191 | void write_vdp( struct Hes_Emu* this, int addr, int data ); | ||
192 | void set_mmr( struct Hes_Emu* this, int reg, int bank ); | ||
193 | int cpu_done( struct Hes_Emu* this ); | ||
194 | |||
195 | #endif | ||