diff options
Diffstat (limited to 'apps/plugins/sdl/src/audio/dc/aica.c')
-rw-r--r-- | apps/plugins/sdl/src/audio/dc/aica.c | 271 |
1 files changed, 0 insertions, 271 deletions
diff --git a/apps/plugins/sdl/src/audio/dc/aica.c b/apps/plugins/sdl/src/audio/dc/aica.c deleted file mode 100644 index b6a1c93644..0000000000 --- a/apps/plugins/sdl/src/audio/dc/aica.c +++ /dev/null | |||
@@ -1,271 +0,0 @@ | |||
1 | /* This file is part of the Dreamcast function library. | ||
2 | * Please see libdream.c for further details. | ||
3 | * | ||
4 | * (c)2000 Dan Potter | ||
5 | * modify BERO | ||
6 | */ | ||
7 | #include "aica.h" | ||
8 | |||
9 | #include <arch/irq.h> | ||
10 | #include <dc/spu.h> | ||
11 | |||
12 | /* #define dc_snd_base ((volatile unsigned char *)0x00800000) */ /* arm side */ | ||
13 | #define dc_snd_base ((volatile unsigned char *)0xa0700000) /* dc side */ | ||
14 | |||
15 | /* Some convienence macros */ | ||
16 | #define SNDREGADDR(x) (0xa0700000 + (x)) | ||
17 | #define CHNREGADDR(ch,x) SNDREGADDR(0x80*(ch)+(x)) | ||
18 | |||
19 | |||
20 | #define SNDREG32(x) (*(volatile unsigned long *)SNDREGADDR(x)) | ||
21 | #define SNDREG8(x) (*(volatile unsigned char *)SNDREGADDR(x)) | ||
22 | #define CHNREG32(ch, x) (*(volatile unsigned long *)CHNREGADDR(ch,x)) | ||
23 | #define CHNREG8(ch, x) (*(volatile unsigned long *)CHNREGADDR(ch,x)) | ||
24 | |||
25 | #define G2_LOCK(OLD) \ | ||
26 | do { \ | ||
27 | if (!irq_inside_int()) \ | ||
28 | OLD = irq_disable(); \ | ||
29 | /* suspend any G2 DMA here... */ \ | ||
30 | while((*(volatile unsigned int *)0xa05f688c) & 0x20) \ | ||
31 | ; \ | ||
32 | } while(0) | ||
33 | |||
34 | #define G2_UNLOCK(OLD) \ | ||
35 | do { \ | ||
36 | /* resume any G2 DMA here... */ \ | ||
37 | if (!irq_inside_int()) \ | ||
38 | irq_restore(OLD); \ | ||
39 | } while(0) | ||
40 | |||
41 | |||
42 | void aica_init() { | ||
43 | int i, j, old = 0; | ||
44 | |||
45 | /* Initialize AICA channels */ | ||
46 | G2_LOCK(old); | ||
47 | SNDREG32(0x2800) = 0x0000; | ||
48 | |||
49 | for (i=0; i<64; i++) { | ||
50 | for (j=0; j<0x80; j+=4) { | ||
51 | if ((j&31)==0) g2_fifo_wait(); | ||
52 | CHNREG32(i, j) = 0; | ||
53 | } | ||
54 | g2_fifo_wait(); | ||
55 | CHNREG32(i,0) = 0x8000; | ||
56 | CHNREG32(i,20) = 0x1f; | ||
57 | } | ||
58 | |||
59 | SNDREG32(0x2800) = 0x000f; | ||
60 | g2_fifo_wait(); | ||
61 | G2_UNLOCK(old); | ||
62 | } | ||
63 | |||
64 | /* Translates a volume from linear form to logarithmic form (required by | ||
65 | the AICA chip */ | ||
66 | /* int logs[] = { | ||
67 | |||
68 | 0, 40, 50, 58, 63, 68, 73, 77, 80, 83, 86, 89, 92, 94, 97, 99, 101, 103, | ||
69 | 105, 107, 109, 111, 112, 114, 116, 117, 119, 120, 122, 123, 125, 126, 127, | ||
70 | 129, 130, 131, 133, 134, 135, 136, 137, 139, 140, 141, 142, 143, 144, 145, | ||
71 | 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 156, 157, 158, 159, | ||
72 | 160, 161, 162, 162, 163, 164, 165, 166, 166, 167, 168, 169, 170, 170, 171, | ||
73 | 172, 172, 173, 174, 175, 175, 176, 177, 177, 178, 179, 180, 180, 181, 182, | ||
74 | 182, 183, 183, 184, 185, 185, 186, 187, 187, 188, 188, 189, 190, 190, 191, | ||
75 | 191, 192, 193, 193, 194, 194, 195, 196, 196, 197, 197, 198, 198, 199, 199, | ||
76 | 200, 201, 201, 202, 202, 203, 203, 204, 204, 205, 205, 206, 206, 207, 207, | ||
77 | 208, 208, 209, 209, 210, 210, 211, 211, 212, 212, 213, 213, 214, 214, 215, | ||
78 | 215, 216, 216, 217, 217, 217, 218, 218, 219, 219, 220, 220, 221, 221, 222, | ||
79 | 222, 222, 223, 223, 224, 224, 225, 225, 225, 226, 226, 227, 227, 228, 228, | ||
80 | 228, 229, 229, 230, 230, 230, 231, 231, 232, 232, 232, 233, 233, 234, 234, | ||
81 | 234, 235, 235, 236, 236, 236, 237, 237, 238, 238, 238, 239, 239, 240, 240, | ||
82 | 240, 241, 241, 241, 242, 242, 243, 243, 243, 244, 244, 244, 245, 245, 245, | ||
83 | 246, 246, 247, 247, 247, 248, 248, 248, 249, 249, 249, 250, 250, 250, 251, | ||
84 | 251, 251, 252, 252, 252, 253, 253, 253, 254, 254, 254, 255 | ||
85 | |||
86 | }; */ | ||
87 | |||
88 | const static unsigned char logs[] = { | ||
89 | 0, 15, 22, 27, 31, 35, 39, 42, 45, 47, 50, 52, 55, 57, 59, 61, | ||
90 | 63, 65, 67, 69, 71, 73, 74, 76, 78, 79, 81, 82, 84, 85, 87, 88, | ||
91 | 90, 91, 92, 94, 95, 96, 98, 99, 100, 102, 103, 104, 105, 106, | ||
92 | 108, 109, 110, 111, 112, 113, 114, 116, 117, 118, 119, 120, 121, | ||
93 | 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, | ||
94 | 135, 136, 137, 138, 138, 139, 140, 141, 142, 143, 144, 145, 146, | ||
95 | 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 156, | ||
96 | 157, 158, 159, 160, 160, 161, 162, 163, 164, 164, 165, 166, 167, | ||
97 | 167, 168, 169, 170, 170, 171, 172, 173, 173, 174, 175, 176, 176, | ||
98 | 177, 178, 178, 179, 180, 181, 181, 182, 183, 183, 184, 185, 185, | ||
99 | 186, 187, 187, 188, 189, 189, 190, 191, 191, 192, 193, 193, 194, | ||
100 | 195, 195, 196, 197, 197, 198, 199, 199, 200, 200, 201, 202, 202, | ||
101 | 203, 204, 204, 205, 205, 206, 207, 207, 208, 209, 209, 210, 210, | ||
102 | 211, 212, 212, 213, 213, 214, 215, 215, 216, 216, 217, 217, 218, | ||
103 | 219, 219, 220, 220, 221, 221, 222, 223, 223, 224, 224, 225, 225, | ||
104 | 226, 227, 227, 228, 228, 229, 229, 230, 230, 231, 232, 232, 233, | ||
105 | 233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 239, 239, 240, | ||
106 | 240, 241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246, | ||
107 | 247, 247, 248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 254, 255 | ||
108 | }; | ||
109 | |||
110 | /* For the moment this is going to have to suffice, until we really | ||
111 | figure out what these mean. */ | ||
112 | #define AICA_PAN(x) ((x)==0x80?(0):((x)<0x80?(0x1f):(0x0f))) | ||
113 | #define AICA_VOL(x) (0xff - logs[128 + (((x) & 0xff) / 2)]) | ||
114 | //#define AICA_VOL(x) (0xff - logs[x&255]) | ||
115 | |||
116 | static inline unsigned AICA_FREQ(unsigned freq) { | ||
117 | unsigned long freq_lo, freq_base = 5644800; | ||
118 | int freq_hi = 7; | ||
119 | |||
120 | /* Need to convert frequency to floating point format | ||
121 | (freq_hi is exponent, freq_lo is mantissa) | ||
122 | Formula is ferq = 44100*2^freq_hi*(1+freq_lo/1024) */ | ||
123 | while (freq < freq_base && freq_hi > -8) { | ||
124 | freq_base >>= 1; | ||
125 | --freq_hi; | ||
126 | } | ||
127 | while (freq < freq_base && freq_hi > -8) { | ||
128 | freq_base >>= 1; | ||
129 | freq_hi--; | ||
130 | } | ||
131 | freq_lo = (freq<<10) / freq_base; | ||
132 | return (freq_hi << 11) | (freq_lo & 1023); | ||
133 | } | ||
134 | |||
135 | /* Sets up a sound channel completely. This is generally good if you want | ||
136 | a quick and dirty way to play notes. If you want a more comprehensive | ||
137 | set of routines (more like PC wavetable cards) see below. | ||
138 | |||
139 | ch is the channel to play on (0 - 63) | ||
140 | smpptr is the pointer to the sound data; if you're running off the | ||
141 | SH4, then this ought to be (ptr - 0xa0800000); otherwise it's just | ||
142 | ptr. Basically, it's an offset into sound ram. | ||
143 | mode is one of the mode constants (16 bit, 8 bit, ADPCM) | ||
144 | nsamp is the number of samples to play (not number of bytes!) | ||
145 | freq is the sampling rate of the sound | ||
146 | vol is the volume, 0 to 0xff (0xff is louder) | ||
147 | pan is a panning constant -- 0 is left, 128 is center, 255 is right. | ||
148 | |||
149 | This routine (and the similar ones) owe a lot to Marcus' sound example -- | ||
150 | I hadn't gotten quite this far into dissecting the individual regs yet. */ | ||
151 | void aica_play(int ch,int mode,unsigned long smpptr,int loopst,int loopend,int freq,int vol,int pan,int loopflag) { | ||
152 | /* int i; | ||
153 | */ | ||
154 | int val; | ||
155 | int old = 0; | ||
156 | |||
157 | /* Stop the channel (if it's already playing) */ | ||
158 | aica_stop(ch); | ||
159 | /* doesn't seem to be needed, but it's here just in case */ | ||
160 | /* | ||
161 | for (i=0; i<256; i++) { | ||
162 | asm("nop"); | ||
163 | asm("nop"); | ||
164 | asm("nop"); | ||
165 | asm("nop"); | ||
166 | } | ||
167 | */ | ||
168 | G2_LOCK(old); | ||
169 | /* Envelope setup. The first of these is the loop point, | ||
170 | e.g., where the sample starts over when it loops. The second | ||
171 | is the loop end. This is the full length of the sample when | ||
172 | you are not looping, or the loop end point when you are (though | ||
173 | storing more than that is a waste of memory if you're not doing | ||
174 | volume enveloping). */ | ||
175 | CHNREG32(ch, 8) = loopst & 0xffff; | ||
176 | CHNREG32(ch, 12) = loopend & 0xffff; | ||
177 | |||
178 | /* Write resulting values */ | ||
179 | CHNREG32(ch, 24) = AICA_FREQ(freq); | ||
180 | |||
181 | /* Set volume, pan, and some other things that we don't know what | ||
182 | they do =) */ | ||
183 | CHNREG32(ch, 36) = AICA_PAN(pan) | (0xf<<8); | ||
184 | /* Convert the incoming volume and pan into hardware values */ | ||
185 | /* Vol starts at zero so we can ramp */ | ||
186 | vol = AICA_VOL(vol); | ||
187 | CHNREG32(ch, 40) = 0x24 | (vol<<8); | ||
188 | /* Convert the incoming volume and pan into hardware values */ | ||
189 | /* Vol starts at zero so we can ramp */ | ||
190 | |||
191 | /* If we supported volume envelopes (which we don't yet) then | ||
192 | this value would set that up. The top 4 bits determine the | ||
193 | envelope speed. f is the fastest, 1 is the slowest, and 0 | ||
194 | seems to be an invalid value and does weird things). The | ||
195 | default (below) sets it into normal mode (play and terminate/loop). | ||
196 | CHNREG32(ch, 16) = 0xf010; | ||
197 | */ | ||
198 | CHNREG32(ch, 16) = 0x1f; /* No volume envelope */ | ||
199 | |||
200 | |||
201 | /* Set sample format, buffer address, and looping control. If | ||
202 | 0x0200 mask is set on reg 0, the sample loops infinitely. If | ||
203 | it's not set, the sample plays once and terminates. We'll | ||
204 | also set the bits to start playback here. */ | ||
205 | CHNREG32(ch, 4) = smpptr & 0xffff; | ||
206 | val = 0xc000 | 0x0000 | (mode<<7) | (smpptr >> 16); | ||
207 | if (loopflag) val|=0x200; | ||
208 | |||
209 | CHNREG32(ch, 0) = val; | ||
210 | |||
211 | G2_UNLOCK(old); | ||
212 | |||
213 | /* Enable playback */ | ||
214 | /* CHNREG32(ch, 0) |= 0xc000; */ | ||
215 | g2_fifo_wait(); | ||
216 | |||
217 | #if 0 | ||
218 | for (i=0xff; i>=vol; i--) { | ||
219 | if ((i&7)==0) g2_fifo_wait(); | ||
220 | CHNREG32(ch, 40) = 0x24 | (i<<8);; | ||
221 | } | ||
222 | |||
223 | g2_fifo_wait(); | ||
224 | #endif | ||
225 | } | ||
226 | |||
227 | /* Stop the sound on a given channel */ | ||
228 | void aica_stop(int ch) { | ||
229 | g2_write_32(CHNREGADDR(ch, 0),(g2_read_32(CHNREGADDR(ch, 0)) & ~0x4000) | 0x8000); | ||
230 | g2_fifo_wait(); | ||
231 | } | ||
232 | |||
233 | |||
234 | /* The rest of these routines can change the channel in mid-stride so you | ||
235 | can do things like vibrato and panning effects. */ | ||
236 | |||
237 | /* Set channel volume */ | ||
238 | void aica_vol(int ch,int vol) { | ||
239 | // g2_write_8(CHNREGADDR(ch, 41),AICA_VOL(vol)); | ||
240 | g2_write_32(CHNREGADDR(ch, 40),(g2_read_32(CHNREGADDR(ch, 40))&0xffff00ff)|(AICA_VOL(vol)<<8) ); | ||
241 | g2_fifo_wait(); | ||
242 | } | ||
243 | |||
244 | /* Set channel pan */ | ||
245 | void aica_pan(int ch,int pan) { | ||
246 | // g2_write_8(CHNREGADDR(ch, 36),AICA_PAN(pan)); | ||
247 | g2_write_32(CHNREGADDR(ch, 36),(g2_read_32(CHNREGADDR(ch, 36))&0xffffff00)|(AICA_PAN(pan)) ); | ||
248 | g2_fifo_wait(); | ||
249 | } | ||
250 | |||
251 | /* Set channel frequency */ | ||
252 | void aica_freq(int ch,int freq) { | ||
253 | g2_write_32(CHNREGADDR(ch, 24),AICA_FREQ(freq)); | ||
254 | g2_fifo_wait(); | ||
255 | } | ||
256 | |||
257 | /* Get channel position */ | ||
258 | int aica_get_pos(int ch) { | ||
259 | #if 1 | ||
260 | /* Observe channel ch */ | ||
261 | g2_write_32(SNDREGADDR(0x280c),(g2_read_32(SNDREGADDR(0x280c))&0xffff00ff) | (ch<<8)); | ||
262 | g2_fifo_wait(); | ||
263 | /* Update position counters */ | ||
264 | return g2_read_32(SNDREGADDR(0x2814)) & 0xffff; | ||
265 | #else | ||
266 | /* Observe channel ch */ | ||
267 | g2_write_8(SNDREGADDR(0x280d),ch); | ||
268 | /* Update position counters */ | ||
269 | return g2_read_32(SNDREGADDR(0x2814)) & 0xffff; | ||
270 | #endif | ||
271 | } | ||