annotate src/audio/arts/SDL_artsaudio.c @ 301:fb4c4c6a2773

Fixed dynamic arts support.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 06 Mar 2002 19:14:17 +0000
parents f6ffac90895c
children 583a07ab5444
rev   line source
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
1 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
2 SDL - Simple DirectMedia Layer
297
f6ffac90895c Updated copyright information for 2002
Sam Lantinga <slouken@libsdl.org>
parents: 294
diff changeset
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
4
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
5 This library is free software; you can redistribute it and/or
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
6 modify it under the terms of the GNU Library General Public
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
7 License as published by the Free Software Foundation; either
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
8 version 2 of the License, or (at your option) any later version.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
9
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
10 This library is distributed in the hope that it will be useful,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
13 Library General Public License for more details.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
14
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
15 You should have received a copy of the GNU Library General Public
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
16 License along with this library; if not, write to the Free
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
18
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
19 Sam Lantinga
252
e8157fcb3114 Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents: 0
diff changeset
20 slouken@libsdl.org
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
21 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
22
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
23 #ifdef SAVE_RCSID
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
24 static char rcsid =
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
25 "@(#) $Id$";
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
26 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
27
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
28 /* Allow access to a raw mixing buffer */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
29
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
30 #include <sys/types.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
31 #include <stdlib.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
32 #include <stdio.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
33 #include <string.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
34 #include <errno.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
35 #include <signal.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
36 #include <unistd.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
37
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
38 #include "SDL_audio.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
39 #include "SDL_error.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
40 #include "SDL_audiomem.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
41 #include "SDL_audio_c.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
42 #include "SDL_timer.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
43 #include "SDL_audiodev_c.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
44 #include "SDL_artsaudio.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
45
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
46 #ifdef ARTSC_DYNAMIC
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
47 #include "SDL_name.h"
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
48 #include "SDL_loadso.h"
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
49 #else
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
50 #define SDL_NAME(X) X
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
51 #endif
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
52
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
53 /* The tag name used by artsc audio */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
54 #define ARTSC_DRIVER_NAME "artsc"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
55
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
56 /* Audio driver functions */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
57 static int ARTSC_OpenAudio(_THIS, SDL_AudioSpec *spec);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
58 static void ARTSC_WaitAudio(_THIS);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
59 static void ARTSC_PlayAudio(_THIS);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
60 static Uint8 *ARTSC_GetAudioBuf(_THIS);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
61 static void ARTSC_CloseAudio(_THIS);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
62
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
63 #ifdef ARTSC_DYNAMIC
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
64
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
65 static const char *arts_library = ARTSC_DYNAMIC;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
66 static void *arts_handle = NULL;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
67 static int arts_loaded = 0;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
68
301
fb4c4c6a2773 Fixed dynamic arts support.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
69 static int (*SDL_NAME(arts_init))(void);
fb4c4c6a2773 Fixed dynamic arts support.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
70 static void (*SDL_NAME(arts_free))(void);
fb4c4c6a2773 Fixed dynamic arts support.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
71 static arts_stream_t (*SDL_NAME(arts_play_stream))(int rate, int bits, int channels, const char *name);
fb4c4c6a2773 Fixed dynamic arts support.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
72 static int (*SDL_NAME(arts_stream_set))(arts_stream_t s, arts_parameter_t param, int value);
fb4c4c6a2773 Fixed dynamic arts support.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
73 static int (*SDL_NAME(arts_stream_get))(arts_stream_t s, arts_parameter_t param);
fb4c4c6a2773 Fixed dynamic arts support.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
74 static int (*SDL_NAME(arts_write))(arts_stream_t s, const void *buffer, int count);
fb4c4c6a2773 Fixed dynamic arts support.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
75 static void (*SDL_NAME(arts_close_stream))(arts_stream_t s);
fb4c4c6a2773 Fixed dynamic arts support.
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
76
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
77 static struct {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
78 const char *name;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
79 void **func;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
80 } arts_functions[] = {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
81 { "arts_init", (void **)&SDL_NAME(arts_init) },
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
82 { "arts_free", (void **)&SDL_NAME(arts_free) },
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
83 { "arts_play_stream", (void **)&SDL_NAME(arts_play_stream) },
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
84 { "arts_stream_set", (void **)&SDL_NAME(arts_stream_set) },
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
85 { "arts_stream_get", (void **)&SDL_NAME(arts_stream_get) },
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
86 { "arts_write", (void **)&SDL_NAME(arts_write) },
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
87 { "arts_close_stream", (void **)&SDL_NAME(arts_close_stream) },
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
88 };
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
89
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
90 static void UnloadARTSLibrary()
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
91 {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
92 if ( arts_loaded ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
93 SDL_UnloadObject(arts_handle);
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
94 arts_handle = NULL;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
95 arts_loaded = 0;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
96 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
97 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
98
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
99 static int LoadARTSLibrary(void)
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
100 {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
101 int i, retval = -1;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
102
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
103 arts_handle = SDL_LoadObject(arts_library);
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
104 if ( arts_handle ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
105 arts_loaded = 1;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
106 retval = 0;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
107 for ( i=0; i<SDL_TABLESIZE(arts_functions); ++i ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
108 *arts_functions[i].func = SDL_LoadFunction(arts_handle, arts_functions[i].name);
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
109 if ( ! arts_functions[i].func ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
110 retval = -1;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
111 UnloadARTSLibrary();
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
112 break;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
113 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
114 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
115 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
116 return retval;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
117 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
118
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
119 #else
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
120
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
121 static void UnloadARTSLibrary()
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
122 {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
123 return;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
124 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
125
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
126 static int LoadARTSLibrary(void)
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
127 {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
128 return 0;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
129 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
130
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
131 #endif /* ARTSC_DYNAMIC */
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
132
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
133 /* Audio driver bootstrap functions */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
134
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
135 static int Audio_Available(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
136 {
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
137 int available = 0;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
138
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
139 if ( LoadARTSLibrary() < 0 ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
140 return available;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
141 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
142 if ( SDL_NAME(arts_init)() == 0 ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
143 available = 1;
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
144 SDL_NAME(arts_free)();
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
145 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
146 UnloadARTSLibrary();
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
147 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
148
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
149 static void Audio_DeleteDevice(SDL_AudioDevice *device)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
150 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
151 free(device->hidden);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
152 free(device);
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
153 UnloadARTSLibrary();
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
154 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
155
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
156 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
157 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
158 SDL_AudioDevice *this;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
159
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
160 /* Initialize all variables that we clean on shutdown */
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
161 LoadARTSLibrary();
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
162 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
163 if ( this ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
164 memset(this, 0, (sizeof *this));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
165 this->hidden = (struct SDL_PrivateAudioData *)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
166 malloc((sizeof *this->hidden));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
167 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
168 if ( (this == NULL) || (this->hidden == NULL) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
169 SDL_OutOfMemory();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
170 if ( this ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
171 free(this);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
172 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
173 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
174 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
175 memset(this->hidden, 0, (sizeof *this->hidden));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
176 stream = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
177
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
178 /* Set the function pointers */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
179 this->OpenAudio = ARTSC_OpenAudio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
180 this->WaitAudio = ARTSC_WaitAudio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
181 this->PlayAudio = ARTSC_PlayAudio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
182 this->GetAudioBuf = ARTSC_GetAudioBuf;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
183 this->CloseAudio = ARTSC_CloseAudio;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
184
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
185 this->free = Audio_DeleteDevice;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
186
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
187 return this;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
188 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
189
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
190 AudioBootStrap ARTSC_bootstrap = {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
191 ARTSC_DRIVER_NAME, "Analog Realtime Synthesizer",
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
192 Audio_Available, Audio_CreateDevice
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
193 };
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
194
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
195 /* This function waits until it is possible to write a full sound buffer */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
196 static void ARTSC_WaitAudio(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
197 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
198 Sint32 ticks;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
199
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
200 /* Check to see if the thread-parent process is still alive */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
201 { static int cnt = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
202 /* Note that this only works with thread implementations
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203 that use a different process id for each thread.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205 if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
206 if ( kill(parent, 0) < 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 this->enabled = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
208 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
209 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
210 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
211
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
212 /* Use timer for general audio synchronization */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
213 ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
214 if ( ticks > 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
215 SDL_Delay(ticks);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
216 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
217 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
218
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
219 static void ARTSC_PlayAudio(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
220 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
221 int written;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
222
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
223 /* Write the audio data */
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
224 written = SDL_NAME(arts_write)(stream, mixbuf, mixlen);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
225
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
226 /* If timer synchronization is enabled, set the next write frame */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
227 if ( frame_ticks ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
228 next_frame += frame_ticks;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
229 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
230
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
231 /* If we couldn't write, assume fatal error for now */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
232 if ( written < 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
233 this->enabled = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
234 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
235 #ifdef DEBUG_AUDIO
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
236 fprintf(stderr, "Wrote %d bytes of audio data\n", written);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
237 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
239
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
240 static Uint8 *ARTSC_GetAudioBuf(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
241 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
242 return(mixbuf);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
243 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
244
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
245 static void ARTSC_CloseAudio(_THIS)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
246 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
247 if ( mixbuf != NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
248 SDL_FreeAudioMem(mixbuf);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
249 mixbuf = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
250 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
251 if ( stream ) {
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
252 SDL_NAME(arts_close_stream)(stream);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
253 stream = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254 }
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
255 SDL_NAME(arts_free)();
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
257
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
258 static int ARTSC_OpenAudio(_THIS, SDL_AudioSpec *spec)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
259 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
260 int bits, frag_spec;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
261 Uint16 test_format, format;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
262
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
263 /* Reset the timer synchronization flag */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
264 frame_ticks = 0.0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
265
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
266 mixbuf = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
267
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
268 /* Try for a closest match on audio format */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269 format = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
270 bits = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
271 for ( test_format = SDL_FirstAudioFormat(spec->format);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
272 ! format && test_format; ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
273 #ifdef DEBUG_AUDIO
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
274 fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
275 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
276 switch ( test_format ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
277 case AUDIO_U8:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
278 bits = 8;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
279 format = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
280 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
281 case AUDIO_S16LSB:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
282 bits = 16;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
283 format = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
284 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 format = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 if ( ! format ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 test_format = SDL_NextAudioFormat();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293 if ( format == 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 SDL_SetError("Couldn't find any hardware audio formats");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
295 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
297 spec->format = test_format;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
299 if ( SDL_NAME(arts_init)() != 0 ) {
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
300 SDL_SetError("Unable to initialize ARTS");
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
301 return(-1);
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
302 }
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
303 stream = SDL_NAME(arts_play_stream)(spec->freq, bits, spec->channels, "SDL");
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305 /* Calculate the final parameters for this audio specification */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 SDL_CalculateAudioSpec(spec);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 /* Determine the power of two of the fragment size */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec );
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310 if ( (0x01<<frag_spec) != spec->size ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311 SDL_SetError("Fragment size must be a power of two");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
312 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
313 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
314 frag_spec |= 0x00020000; /* two fragments, for low latency */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 #ifdef ARTS_P_PACKET_SETTINGS
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
317 SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SETTINGS, frag_spec);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 #else
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
319 SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SIZE, frag_spec&0xffff);
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
320 SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_COUNT, frag_spec>>16);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321 #endif
294
d2d48e10f370 Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
322 spec->size = SDL_NAME(arts_stream_get)(stream, ARTS_P_PACKET_SIZE);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324 /* Allocate mixing buffer */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 mixlen = spec->size;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326 mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327 if ( mixbuf == NULL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 memset(mixbuf, spec->silence, spec->size);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 /* Get the parent process id (we're the parent of the audio thread) */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 parent = getpid();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 /* We're ready to rock and roll. :-) */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 }