Mercurial > hg > forks > pwpunix
annotate pwplib/snd-sdl.c @ 6:e2f028bf775a
Possibly start SDL audio more sanely.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Tue, 18 May 2010 05:34:18 +0300 |
| parents | acb5694e93d9 |
| children | a379d6a2a717 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * pwplib SDL (Simple Directmedia Layer) audio "driver" | |
| 3 * (C) Copyright 2010 ccr/TNSP^PWP <ccr@tnsp.org> | |
| 4 * | |
| 5 * This file and other changes are distributed under same | |
| 6 * license as pwplib itself. | |
| 7 */ | |
| 8 | |
| 9 #include "config.h" | |
| 10 | |
| 11 #ifdef DRIVE_SDL | |
| 12 | |
| 13 #include <stdio.h> | |
| 14 #include <stdlib.h> | |
| 15 #include <unistd.h> | |
| 16 #include <SDL.h> | |
| 17 | |
| 18 #include "pwplib.h" | |
| 19 | |
| 20 #define TIMERHZ 72 | |
| 21 | |
|
6
e2f028bf775a
Possibly start SDL audio more sanely.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
22 static int pwp_sdlaudio_start = 1; |
| 0 | 23 |
| 24 extern void gb_sound(int, int, int, int); | |
| 25 | |
| 26 | |
| 27 static void pwp_sdlaudio_fill(void *udata, Uint8 * buf, int len) | |
| 28 { | |
| 29 pwplib.player(); | |
| 30 gb_genwave(buf, len); | |
| 31 } | |
| 32 | |
| 33 static void pwp_sdlaudio_loopflush(void) | |
| 34 { | |
|
6
e2f028bf775a
Possibly start SDL audio more sanely.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
35 if (pwp_sdlaudio_start) { |
|
e2f028bf775a
Possibly start SDL audio more sanely.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
36 pwp_sdlaudio_start = 0; |
|
e2f028bf775a
Possibly start SDL audio more sanely.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
37 SDL_PauseAudio(0); |
|
e2f028bf775a
Possibly start SDL audio more sanely.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
38 } |
| 0 | 39 } |
| 40 | |
| 41 static void pwp_sdlaudio_close(void) | |
| 42 { | |
| 43 SDL_CloseAudio(); | |
| 44 } | |
| 45 | |
| 46 int pwp_sdlaudio_init() | |
| 47 { | |
| 48 SDL_AudioSpec fmt; | |
| 49 | |
| 50 fmt.freq = 44100; | |
| 51 fmt.format = AUDIO_U8; | |
| 52 fmt.channels = 1; | |
| 53 fmt.samples = fmt.freq / TIMERHZ; | |
| 54 fmt.callback = pwp_sdlaudio_fill; | |
| 55 | |
| 56 if (SDL_OpenAudio(&fmt, NULL) < 0) | |
| 57 { | |
| 58 pwpwrite("* SDL: Could not get desired audio format.\n"); | |
| 59 return 0; | |
| 60 } | |
| 61 | |
| 62 pwpwrite("* SDL sound\n"); | |
| 63 | |
| 64 pwplib.sound = gb_sound; | |
| 65 pwplib.loopflush = pwp_sdlaudio_loopflush; | |
| 66 gb_init(fmt.freq); | |
| 67 | |
| 68 pwp_regdestr(pwp_sdlaudio_close); | |
| 69 | |
| 70 return 1; | |
| 71 } | |
| 72 #endif |