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comparison src/audio/mint/SDL_mintaudio_gsxb.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
64 /*--- Audio driver functions ---*/ 64 /*--- Audio driver functions ---*/
65 65
66 /* GSXB callbacks */ 66 /* GSXB callbacks */
67 static void MINTGSXB_GsxbInterrupt(void); 67 static void MINTGSXB_GsxbInterrupt(void);
68 static void MINTGSXB_GsxbNullInterrupt(void); 68 static void MINTGSXB_GsxbNullInterrupt(void);
69
70
71 static int
72 MINTGSXB_Available(void)
73 {
74 /* Cookie _SND present ? if not, assume ST machine */
75 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
76 cookie_snd = SND_PSG;
77 }
78
79 /* Check if we have 16 bits audio */
80 if ((cookie_snd & SND_16BIT) == 0) {
81 DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
82 return (0);
83 }
84
85 /* Cookie GSXB present ? */
86 cookie_gsxb = (Getcookie(C_GSXB, &cookie_gsxb) == C_FOUND);
87
88 /* Is it GSXB ? */
89 if (((cookie_snd & SND_GSXB) == 0) || (cookie_gsxb == 0)) {
90 DEBUG_PRINT((DEBUG_NAME "no GSXB audio\n"));
91 return (0);
92 }
93
94 /* Check if audio is lockable */
95 if (Locksnd() != 1) {
96 DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
97 return (0);
98 }
99
100 Unlocksnd();
101
102 DEBUG_PRINT((DEBUG_NAME "GSXB audio available!\n"));
103 return (1);
104 }
105
106 69
107 static void 70 static void
108 MINTGSXB_LockDevice(_THIS) 71 MINTGSXB_LockDevice(_THIS)
109 { 72 {
110 /* Stop replay */ 73 /* Stop replay */
425 } 388 }
426 389
427 static int 390 static int
428 MINTGSXB_Init(SDL_AudioDriverImpl *impl) 391 MINTGSXB_Init(SDL_AudioDriverImpl *impl)
429 { 392 {
393 /* Cookie _SND present ? if not, assume ST machine */
394 if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
395 cookie_snd = SND_PSG;
396 }
397
398 /* Check if we have 16 bits audio */
399 if ((cookie_snd & SND_16BIT) == 0) {
400 SDL_SetError(DEBUG_NAME "no 16-bit sound");
401 return 0;
402 }
403
404 /* Cookie GSXB present ? */
405 cookie_gsxb = (Getcookie(C_GSXB, &cookie_gsxb) == C_FOUND);
406
407 /* Is it GSXB ? */
408 if (((cookie_snd & SND_GSXB) == 0) || (cookie_gsxb == 0)) {
409 SDL_SetError(DEBUG_NAME "no GSXB audio");
410 return 0;
411 }
412
413 /* Check if audio is lockable */
414 if (Locksnd() != 1) {
415 SDL_SetError(DEBUG_NAME "audio locked by other application");
416 return 0;
417 }
418
419 Unlocksnd();
420
421 DEBUG_PRINT((DEBUG_NAME "GSXB audio available!\n"));
422
430 /* Set the function pointers */ 423 /* Set the function pointers */
431 impl->OpenDevice = MINTGSXB_OpenDevice; 424 impl->OpenDevice = MINTGSXB_OpenDevice;
432 impl->CloseDevice = MINTGSXB_CloseDevice; 425 impl->CloseDevice = MINTGSXB_CloseDevice;
433 impl->LockAudio = MINTGSXB_LockAudio; 426 impl->LockAudio = MINTGSXB_LockAudio;
434 impl->UnlockAudio = MINTGSXB_UnlockAudio; 427 impl->UnlockAudio = MINTGSXB_UnlockAudio;
438 431
439 return 1; 432 return 1;
440 } 433 }
441 434
442 AudioBootStrap MINTAUDIO_GSXB_bootstrap = { 435 AudioBootStrap MINTAUDIO_GSXB_bootstrap = {
443 MINT_AUDIO_DRIVER_NAME, "MiNT GSXB audio driver", 436 MINT_AUDIO_DRIVER_NAME, "MiNT GSXB audio driver", MINTGSXB_Init, 0
444 MINTGSXB_Available, MINTGSXB_Init, 0
445 }; 437 };
446 438
447 /* vi: set ts=4 sw=4 expandtab: */ 439 /* vi: set ts=4 sw=4 expandtab: */