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comparison src/audio/mint/SDL_mintaudio_mcsn.c @ 3846:66fb40445587 SDL-ryan-multiple-audio-device

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Removed distinction between "available" and "init" in audio backends, since both had to be checked for success as a pair at the higher level and several of the Available methods were just always-succeed placeholders anyhow. Now the availability check is done in the init code, and the higher level tries all possible drivers until one manages to initialize successfully.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 17 Oct 2006 09:09:21 +0000
parents 1f156fd874fa
children
comparison
equal deleted inserted replaced
3845:ee5dfa7f7993 3846:66fb40445587
63 63
64 static unsigned long cookie_snd = 0; 64 static unsigned long cookie_snd = 0;
65 static unsigned long cookie_mch = 0; 65 static unsigned long cookie_mch = 0;
66 static cookie_mcsn_t *cookie_mcsn = NULL; 66 static cookie_mcsn_t *cookie_mcsn = NULL;
67 67
68 static int
69 MINTMCSN_Available(void)
70 {
71 unsigned long dummy = 0;
72
73 SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND);
74
75 /* We can't use XBIOS in interrupt with Magic, don't know about thread */
76 if (Getcookie(C_MagX, &dummy) == C_FOUND) {
77 return (0);
78 }
79
80 /* Cookie _MCH present ? if not, assume ST machine */
81 if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) {
82 cookie_mch = MCH_ST;
83 }
84
85 /* Cookie _SND present ? if not, assume ST machine */
86 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
87 cookie_snd = SND_PSG;
88 }
89
90 /* Check if we have 16 bits audio */
91 if ((cookie_snd & SND_16BIT) == 0) {
92 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
93 return (0);
94 }
95
96 /* Cookie MCSN present ? */
97 if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) {
98 DEBUG_PRINT((DEBUG_NAME "no MCSN audio\n"));
99 return (0);
100 }
101
102 /* Check if interrupt at end of replay */
103 if (cookie_mcsn->pint == 0) {
104 DEBUG_PRINT((DEBUG_NAME "no interrupt at end of replay\n"));
105 return (0);
106 }
107
108 /* Check if audio is lockable */
109 if (Locksnd() != 1) {
110 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
111 return (0);
112 }
113
114 Unlocksnd();
115
116 DEBUG_PRINT((DEBUG_NAME "MCSN audio available!\n"));
117 return (1);
118 }
119
120 static void 68 static void
121 MINTMCSN_LockDevice(_THIS) 69 MINTMCSN_LockDevice(_THIS)
122 { 70 {
123 /* Stop replay */ 71 /* Stop replay */
124 Buffoper(0); 72 Buffoper(0);
379 } 327 }
380 328
381 static int 329 static int
382 MINTMCSN_Init(SDL_AudioDriverImpl *impl) 330 MINTMCSN_Init(SDL_AudioDriverImpl *impl)
383 { 331 {
332 unsigned long dummy = 0;
333
334 SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND);
335
336 /* We can't use XBIOS in interrupt with Magic, don't know about thread */
337 if (Getcookie(C_MagX, &dummy) == C_FOUND) {
338 return 0;
339 }
340
341 /* Cookie _MCH present ? if not, assume ST machine */
342 if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) {
343 cookie_mch = MCH_ST;
344 }
345
346 /* Cookie _SND present ? if not, assume ST machine */
347 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
348 cookie_snd = SND_PSG;
349 }
350
351 /* Check if we have 16 bits audio */
352 if ((cookie_snd & SND_16BIT) == 0) {
353 SDL_SetError(DEBUG_NAME "no 16-bit sound");
354 return 0;
355 }
356
357 /* Cookie MCSN present ? */
358 if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) {
359 SDL_SetError(DEBUG_NAME "no MCSN audio");
360 return 0;
361 }
362
363 /* Check if interrupt at end of replay */
364 if (cookie_mcsn->pint == 0) {
365 SDL_SetError(DEBUG_NAME "no interrupt at end of replay");
366 return 0;
367 }
368
369 /* Check if audio is lockable */
370 if (Locksnd() != 1) {
371 SDL_SetError(DEBUG_NAME "audio locked by other application");
372 return 0;
373 }
374
375 Unlocksnd();
376
377 DEBUG_PRINT((DEBUG_NAME "MCSN audio available!\n"));
378
384 /* Set the function pointers */ 379 /* Set the function pointers */
385 impl->OpenDevice = MINTMCSN_OpenDevice; 380 impl->OpenDevice = MINTMCSN_OpenDevice;
386 impl->CloseDevice = MINTMCSN_CloseDevice; 381 impl->CloseDevice = MINTMCSN_CloseDevice;
387 impl->LockAudio = MINTMCSN_LockAudio; 382 impl->LockAudio = MINTMCSN_LockAudio;
388 impl->UnlockAudio = MINTMCSN_UnlockAudio; 383 impl->UnlockAudio = MINTMCSN_UnlockAudio;
392 387
393 return 1; 388 return 1;
394 } 389 }
395 390
396 AudioBootStrap MINTAUDIO_MCSN_bootstrap = { 391 AudioBootStrap MINTAUDIO_MCSN_bootstrap = {
397 MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver", 392 MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver", MINTMCSN_Init, 0
398 MINTMCSN_Available, MINTMCSN_Init, 0
399 }; 393 };
400 394
401 /* vi: set ts=4 sw=4 expandtab: */ 395 /* vi: set ts=4 sw=4 expandtab: */