e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 Sam Lantinga |
4 | |
5 | This library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Library General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2 of the License, or (at your option) any later version. |
9 | |
10 | This library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Library General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Library General Public |
16 | License along with this library; if not, write to the Free |
17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | |
19 | Sam Lantinga |
20 | slouken@libsdl.org |
21 | */ |
22 | #include "SDL_config.h" |
23 | |
24 | /* |
25 | MiNT audio driver |
26 | using XBIOS functions (MacSound compatible driver) |
27 | |
28 | Patrice Mandin |
29 | */ |
30 | |
31 | #include <support.h> |
32 | |
33 | /* Mint includes */ |
34 | #include <mint/osbind.h> |
35 | #include <mint/falcon.h> |
36 | #include <mint/cookie.h> |
37 | |
38 | #include "SDL_audio.h" |
39 | #include "../SDL_audio_c.h" |
40 | #include "../SDL_sysaudio.h" |
41 | |
42 | #include "../../video/ataricommon/SDL_atarimxalloc_c.h" |
43 | |
44 | #include "SDL_mintaudio.h" |
45 | #include "SDL_mintaudio_mcsn.h" |
46 | |
47 | /*--- Defines ---*/ |
48 | |
49 | #define MINT_AUDIO_DRIVER_NAME "mint_mcsn" |
50 | |
51 | /* Debug print info */ |
52 | #define DEBUG_NAME "audio:mcsn: " |
53 | #if 0 |
54 | #define DEBUG_PRINT(what) \ |
55 | { \ |
56 | printf what; \ |
57 | } |
58 | #else |
59 | #define DEBUG_PRINT(what) |
60 | #endif |
61 | |
62 | /*--- Static variables ---*/ |
63 | |
64 | static unsigned long cookie_snd, cookie_mch; |
65 | static cookie_mcsn_t *cookie_mcsn; |
66 | |
67 | /*--- Audio driver functions ---*/ |
68 | |
69 | static void Mint_CloseAudio(_THIS); |
70 | static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec); |
71 | static void Mint_LockAudio(_THIS); |
72 | static void Mint_UnlockAudio(_THIS); |
73 | |
74 | /* To check/init hardware audio */ |
75 | static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec); |
76 | static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec); |
77 | |
78 | /*--- Audio driver bootstrap functions ---*/ |
79 | |
80 | static int Audio_Available(void) |
81 | { |
82 | unsigned long dummy; |
83 | const char *envr = SDL_getenv("SDL_AUDIODRIVER"); |
84 | |
85 | SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND); |
86 | |
87 | /* We can't use XBIOS in interrupt with Magic, don't know about thread */ |
88 | if (Getcookie(C_MagX, &dummy) == C_FOUND) { |
89 | return(0); |
90 | } |
91 | |
92 | /* Check if user asked a different audio driver */ |
93 | if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) { |
94 | DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n")); |
95 | return(0); |
96 | } |
97 | |
98 | /* Cookie _MCH present ? if not, assume ST machine */ |
99 | if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) { |
100 | cookie_mch = MCH_ST; |
101 | } |
102 | |
103 | /* Cookie _SND present ? if not, assume ST machine */ |
104 | if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) { |
105 | cookie_snd = SND_PSG; |
106 | } |
107 | |
108 | /* Check if we have 16 bits audio */ |
109 | if ((cookie_snd & SND_16BIT)==0) { |
110 | DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n")); |
111 | return(0); |
112 | } |
113 | |
114 | /* Cookie MCSN present ? */ |
115 | if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) { |
116 | DEBUG_PRINT((DEBUG_NAME "no MCSN audio\n")); |
117 | return(0); |
118 | } |
119 | |
120 | /* Check if interrupt at end of replay */ |
121 | if (cookie_mcsn->pint == 0) { |
122 | DEBUG_PRINT((DEBUG_NAME "no interrupt at end of replay\n")); |
123 | return(0); |
124 | } |
125 | |
126 | /* Check if audio is lockable */ |
127 | if (Locksnd()!=1) { |
128 | DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n")); |
129 | return(0); |
130 | } |
131 | |
132 | Unlocksnd(); |
133 | |
134 | DEBUG_PRINT((DEBUG_NAME "MCSN audio available!\n")); |
135 | return(1); |
136 | } |
137 | |
138 | static void Audio_DeleteDevice(SDL_AudioDevice *device) |
139 | { |
140 | SDL_free(device->hidden); |
141 | SDL_free(device); |
142 | } |
143 | |
144 | static SDL_AudioDevice *Audio_CreateDevice(int devindex) |
145 | { |
146 | SDL_AudioDevice *this; |
147 | |
148 | /* Initialize all variables that we clean on shutdown */ |
149 | this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
150 | if ( this ) { |
151 | SDL_memset(this, 0, (sizeof *this)); |
152 | this->hidden = (struct SDL_PrivateAudioData *) |
153 | SDL_malloc((sizeof *this->hidden)); |
154 | } |
155 | if ( (this == NULL) || (this->hidden == NULL) ) { |
156 | SDL_OutOfMemory(); |
157 | if ( this ) { |
158 | SDL_free(this); |
159 | } |
160 | return(0); |
161 | } |
162 | SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
163 | |
164 | /* Set the function pointers */ |
165 | this->OpenAudio = Mint_OpenAudio; |
166 | this->CloseAudio = Mint_CloseAudio; |
167 | this->LockAudio = Mint_LockAudio; |
168 | this->UnlockAudio = Mint_UnlockAudio; |
169 | this->free = Audio_DeleteDevice; |
170 | |
171 | return this; |
172 | } |
173 | |
174 | AudioBootStrap MINTAUDIO_MCSN_bootstrap = { |
175 | MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver", |
176 | Audio_Available, Audio_CreateDevice |
177 | }; |
178 | |
179 | static void Mint_LockAudio(_THIS) |
180 | { |
181 | /* Stop replay */ |
182 | Buffoper(0); |
183 | } |
184 | |
185 | static void Mint_UnlockAudio(_THIS) |
186 | { |
187 | /* Restart replay */ |
188 | Buffoper(SB_PLA_ENA|SB_PLA_RPT); |
189 | } |
190 | |
191 | static void Mint_CloseAudio(_THIS) |
192 | { |
193 | /* Stop replay */ |
194 | SDL_MintAudio_WaitThread(); |
195 | Buffoper(0); |
196 | |
197 | if (!SDL_MintAudio_mint_present) { |
198 | /* Uninstall interrupt */ |
199 | Jdisint(MFP_DMASOUND); |
200 | } |
201 | |
202 | /* Wait if currently playing sound */ |
203 | while (SDL_MintAudio_mutex != 0) { |
204 | } |
205 | |
206 | /* Clear buffers */ |
207 | if (SDL_MintAudio_audiobuf[0]) { |
208 | Mfree(SDL_MintAudio_audiobuf[0]); |
209 | SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL; |
210 | } |
211 | |
212 | /* Unlock sound system */ |
213 | Unlocksnd(); |
214 | } |
215 | |
216 | static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec) |
217 | { |
218 | int i; |
219 | unsigned long masterclock, masterprediv; |
220 | |
221 | DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff)); |
222 | DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0))); |
223 | DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0))); |
224 | DEBUG_PRINT(("channels=%d, ", spec->channels)); |
225 | DEBUG_PRINT(("freq=%d\n", spec->freq)); |
226 | |
227 | if (spec->channels > 2) { |
228 | spec->channels = 2; /* no more than stereo! */ |
229 | } |
230 | |
231 | /* Check formats available */ |
232 | MINTAUDIO_freqcount=0; |
233 | switch(cookie_mcsn->play) { |
234 | case MCSN_ST: |
235 | spec->channels=1; |
236 | spec->format=8; /* FIXME: is it signed or unsigned ? */ |
237 | SDL_MintAudio_AddFrequency(this, 12500, 0, 0, -1); |
238 | break; |
239 | case MCSN_TT: /* Also STE, Mega STE */ |
240 | spec->format=AUDIO_S8; |
241 | masterclock=MASTERCLOCK_STE; |
242 | masterprediv=MASTERPREDIV_STE; |
243 | if ((cookie_mch>>16)==MCH_TT) { |
244 | masterclock=MASTERCLOCK_TT; |
245 | masterprediv=MASTERPREDIV_TT; |
246 | } |
247 | for (i=0; i<4; i++) { |
248 | SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)), |
249 | masterclock, 3-i, -1); |
250 | } |
251 | break; |
252 | case MCSN_FALCON: /* Also Mac */ |
253 | for (i=1; i<12; i++) { |
254 | /* Remove unusable Falcon codec predivisors */ |
255 | if ((i==6) || (i==8) || (i==10)) { |
256 | continue; |
257 | } |
258 | SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)), |
259 | CLK25M, i+1, -1); |
260 | } |
261 | if (cookie_mcsn->res1 != 0) { |
262 | for (i=1; i<4; i++) { |
263 | SDL_MintAudio_AddFrequency(this, (cookie_mcsn->res1)/(MASTERPREDIV_FALCON*(1<<i)), |
264 | CLKEXT, (1<<i)-1, -1); |
265 | } |
266 | } |
267 | spec->format |= 0x8000; /* Audio is always signed */ |
268 | if ((spec->format & 0x00ff)==16) { |
269 | spec->format |= 0x1000; /* Audio is always big endian */ |
270 | spec->channels=2; /* 16 bits always stereo */ |
271 | } |
272 | break; |
273 | } |
274 | |
275 | #if 0 |
276 | for (i=0; i<MINTAUDIO_freqcount; i++) { |
277 | DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n", |
278 | i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock, |
279 | MINTAUDIO_frequencies[i].predivisor |
280 | )); |
281 | } |
282 | #endif |
283 | |
284 | MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq); |
285 | spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency; |
286 | |
287 | DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff)); |
288 | DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0))); |
289 | DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0))); |
290 | DEBUG_PRINT(("channels=%d, ", spec->channels)); |
291 | DEBUG_PRINT(("freq=%d\n", spec->freq)); |
292 | |
293 | return 0; |
294 | } |
295 | |
296 | static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec) |
297 | { |
298 | int channels_mode, prediv, dmaclock; |
299 | void *buffer; |
300 | |
301 | /* Stop currently playing sound */ |
302 | SDL_MintAudio_quit_thread = SDL_FALSE; |
303 | SDL_MintAudio_thread_finished = SDL_TRUE; |
304 | SDL_MintAudio_WaitThread(); |
305 | Buffoper(0); |
306 | |
307 | /* Set replay tracks */ |
308 | Settracks(0,0); |
309 | Setmontracks(0); |
310 | |
311 | /* Select replay format */ |
312 | channels_mode=STEREO16; |
313 | switch (spec->format & 0xff) { |
314 | case 8: |
315 | if (spec->channels==2) { |
316 | channels_mode=STEREO8; |
317 | } else { |
318 | channels_mode=MONO8; |
319 | } |
320 | break; |
321 | } |
322 | if (Setmode(channels_mode)<0) { |
323 | DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n")); |
324 | } |
325 | |
326 | dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock; |
327 | prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor; |
328 | switch(cookie_mcsn->play) { |
329 | case MCSN_TT: |
330 | Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1); |
331 | Soundcmd(SETPRESCALE, prediv); |
332 | DEBUG_PRINT((DEBUG_NAME "STE/TT prescaler selected\n")); |
333 | break; |
334 | case MCSN_FALCON: |
335 | Devconnect(DMAPLAY, DAC, dmaclock, prediv, 1); |
336 | DEBUG_PRINT((DEBUG_NAME "Falcon prescaler selected\n")); |
337 | break; |
338 | } |
339 | |
340 | /* Set buffer */ |
341 | buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf]; |
342 | if (Setbuffer(0, buffer, buffer + spec->size)<0) { |
343 | DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n")); |
344 | } |
345 | |
346 | if (SDL_MintAudio_mint_present) { |
347 | SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0); |
348 | } else { |
349 | /* Install interrupt */ |
350 | Jdisint(MFP_DMASOUND); |
351 | Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt); |
352 | Jenabint(MFP_DMASOUND); |
353 | |
354 | if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) { |
355 | DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n")); |
356 | } |
357 | } |
358 | |
359 | /* Go */ |
360 | Buffoper(SB_PLA_ENA|SB_PLA_RPT); |
361 | DEBUG_PRINT((DEBUG_NAME "hardware initialized\n")); |
362 | } |
363 | |
364 | static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec) |
365 | { |
366 | /* Lock sound system */ |
367 | if (Locksnd()!=1) { |
368 | SDL_SetError("Mint_OpenAudio: Audio system already in use"); |
369 | return(-1); |
370 | } |
371 | |
372 | SDL_MintAudio_device = this; |
373 | |
374 | /* Check audio capabilities */ |
375 | if (Mint_CheckAudio(this, spec)==-1) { |
376 | return -1; |
377 | } |
378 | |
379 | SDL_CalculateAudioSpec(spec); |
380 | |
381 | /* Allocate memory for audio buffers in DMA-able RAM */ |
382 | DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size)); |
383 | |
384 | SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM); |
385 | if (SDL_MintAudio_audiobuf[0]==NULL) { |
386 | SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer"); |
387 | return (-1); |
388 | } |
389 | SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ; |
390 | SDL_MintAudio_numbuf=0; |
391 | SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2); |
392 | SDL_MintAudio_audiosize = spec->size; |
393 | SDL_MintAudio_mutex = 0; |
394 | |
395 | DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0])); |
396 | DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1])); |
397 | |
398 | SDL_MintAudio_CheckFpu(); |
399 | |
400 | /* Setup audio hardware */ |
401 | Mint_InitAudio(this, spec); |
402 | |
403 | return(1); /* We don't use SDL threaded audio */ |
404 | } |