Mercurial > sdl-ios-xcode
annotate src/audio/arts/SDL_artsaudio.c @ 1336:3692456e7b0f
Use SDL_ prefixed versions of C library functions.
FIXME:
Change #include <stdlib.h> to #include "SDL_stdlib.h"
Change #include <string.h> to #include "SDL_string.h"
Make sure nothing else broke because of this...
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 07 Feb 2006 06:59:48 +0000 |
| parents | c9b51268668f |
| children | 604d73db6802 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
956
diff
changeset
|
3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
956
diff
changeset
|
6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
956
diff
changeset
|
8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
956
diff
changeset
|
13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
956
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
956
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
956
diff
changeset
|
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 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 | 21 */ |
| 22 | |
| 23 /* Allow access to a raw mixing buffer */ | |
| 24 | |
| 25 #include <sys/types.h> | |
| 26 #include <stdlib.h> | |
| 27 #include <stdio.h> | |
| 28 #include <string.h> | |
| 29 #include <errno.h> | |
| 30 #include <signal.h> | |
| 31 #include <unistd.h> | |
| 32 | |
| 33 #include "SDL_audio.h" | |
| 34 #include "SDL_error.h" | |
| 35 #include "SDL_audiomem.h" | |
| 36 #include "SDL_audio_c.h" | |
| 37 #include "SDL_timer.h" | |
| 38 #include "SDL_audiodev_c.h" | |
| 39 #include "SDL_artsaudio.h" | |
| 40 | |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
41 #ifdef ARTSC_DYNAMIC |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
42 #include "SDL_name.h" |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
43 #include "SDL_loadso.h" |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
44 #else |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
45 #define SDL_NAME(X) X |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
46 #endif |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
47 |
| 0 | 48 /* The tag name used by artsc audio */ |
|
956
4263beff9e38
Date: Mon, 30 Aug 2004 18:20:25 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
929
diff
changeset
|
49 #define ARTSC_DRIVER_NAME "arts" |
| 0 | 50 |
| 51 /* Audio driver functions */ | |
| 52 static int ARTSC_OpenAudio(_THIS, SDL_AudioSpec *spec); | |
| 53 static void ARTSC_WaitAudio(_THIS); | |
| 54 static void ARTSC_PlayAudio(_THIS); | |
| 55 static Uint8 *ARTSC_GetAudioBuf(_THIS); | |
| 56 static void ARTSC_CloseAudio(_THIS); | |
| 57 | |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
58 #ifdef ARTSC_DYNAMIC |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
59 |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
60 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
|
61 static void *arts_handle = NULL; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
62 static int arts_loaded = 0; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
63 |
|
301
fb4c4c6a2773
Fixed dynamic arts support.
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
64 static int (*SDL_NAME(arts_init))(void); |
|
fb4c4c6a2773
Fixed dynamic arts support.
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
65 static void (*SDL_NAME(arts_free))(void); |
|
fb4c4c6a2773
Fixed dynamic arts support.
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
66 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
|
67 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
|
68 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
|
69 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
|
70 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
|
71 |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
72 static struct { |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
73 const char *name; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
74 void **func; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
75 } arts_functions[] = { |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
76 { "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
|
77 { "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
|
78 { "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
|
79 { "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
|
80 { "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
|
81 { "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
|
82 { "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
|
83 }; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
84 |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
85 static void UnloadARTSLibrary() |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
86 { |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
87 if ( arts_loaded ) { |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
88 SDL_UnloadObject(arts_handle); |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
89 arts_handle = NULL; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
90 arts_loaded = 0; |
|
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 } |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
93 |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
94 static int LoadARTSLibrary(void) |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
95 { |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
96 int i, retval = -1; |
|
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 arts_handle = SDL_LoadObject(arts_library); |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
99 if ( arts_handle ) { |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
100 arts_loaded = 1; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
101 retval = 0; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
102 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
|
103 *arts_functions[i].func = SDL_LoadFunction(arts_handle, arts_functions[i].name); |
|
864
0c892e99b65b
Date: Sun, 29 Feb 2004 20:28:27 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
104 if ( !*arts_functions[i].func ) { |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
105 retval = -1; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
106 UnloadARTSLibrary(); |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
107 break; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
108 } |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
109 } |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
110 } |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
111 return retval; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
112 } |
|
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 #else |
|
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 static void UnloadARTSLibrary() |
|
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 return; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
119 } |
|
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 int LoadARTSLibrary(void) |
|
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 0; |
|
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 #endif /* ARTSC_DYNAMIC */ |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
127 |
| 0 | 128 /* Audio driver bootstrap functions */ |
| 129 | |
| 130 static int Audio_Available(void) | |
| 131 { | |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
132 int available = 0; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
133 |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
134 if ( LoadARTSLibrary() < 0 ) { |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
135 return available; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
136 } |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
137 if ( SDL_NAME(arts_init)() == 0 ) { |
|
929
03fb90fc135e
Date: Mon, 05 Jul 2004 14:37:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
864
diff
changeset
|
138 #define ARTS_CRASH_HACK /* Play a stream so aRts doesn't crash */ |
|
03fb90fc135e
Date: Mon, 05 Jul 2004 14:37:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
864
diff
changeset
|
139 #ifdef ARTS_CRASH_HACK |
|
03fb90fc135e
Date: Mon, 05 Jul 2004 14:37:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
864
diff
changeset
|
140 arts_stream_t stream2; |
|
03fb90fc135e
Date: Mon, 05 Jul 2004 14:37:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
864
diff
changeset
|
141 stream2=SDL_NAME(arts_play_stream)(44100, 16, 2, "SDL"); |
|
03fb90fc135e
Date: Mon, 05 Jul 2004 14:37:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
864
diff
changeset
|
142 SDL_NAME(arts_write)(stream2, "", 0); |
|
03fb90fc135e
Date: Mon, 05 Jul 2004 14:37:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
864
diff
changeset
|
143 SDL_NAME(arts_close_stream)(stream2); |
|
03fb90fc135e
Date: Mon, 05 Jul 2004 14:37:59 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
864
diff
changeset
|
144 #endif |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
145 available = 1; |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
146 SDL_NAME(arts_free)(); |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
147 } |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
148 UnloadARTSLibrary(); |
|
474
583a07ab5444
Doh! Patch by Joel Ray Holveck
Sam Lantinga <slouken@libsdl.org>
parents:
301
diff
changeset
|
149 |
|
583a07ab5444
Doh! Patch by Joel Ray Holveck
Sam Lantinga <slouken@libsdl.org>
parents:
301
diff
changeset
|
150 return available; |
| 0 | 151 } |
| 152 | |
| 153 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
| 154 { | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
155 SDL_free(device->hidden); |
|
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
156 SDL_free(device); |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
157 UnloadARTSLibrary(); |
| 0 | 158 } |
| 159 | |
| 160 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
| 161 { | |
| 162 SDL_AudioDevice *this; | |
| 163 | |
| 164 /* 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
|
165 LoadARTSLibrary(); |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
166 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); |
| 0 | 167 if ( this ) { |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
168 SDL_memset(this, 0, (sizeof *this)); |
| 0 | 169 this->hidden = (struct SDL_PrivateAudioData *) |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
170 SDL_malloc((sizeof *this->hidden)); |
| 0 | 171 } |
| 172 if ( (this == NULL) || (this->hidden == NULL) ) { | |
| 173 SDL_OutOfMemory(); | |
| 174 if ( this ) { | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
175 SDL_free(this); |
| 0 | 176 } |
| 177 return(0); | |
| 178 } | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
179 SDL_memset(this->hidden, 0, (sizeof *this->hidden)); |
| 0 | 180 stream = 0; |
| 181 | |
| 182 /* Set the function pointers */ | |
| 183 this->OpenAudio = ARTSC_OpenAudio; | |
| 184 this->WaitAudio = ARTSC_WaitAudio; | |
| 185 this->PlayAudio = ARTSC_PlayAudio; | |
| 186 this->GetAudioBuf = ARTSC_GetAudioBuf; | |
| 187 this->CloseAudio = ARTSC_CloseAudio; | |
| 188 | |
| 189 this->free = Audio_DeleteDevice; | |
| 190 | |
| 191 return this; | |
| 192 } | |
| 193 | |
| 194 AudioBootStrap ARTSC_bootstrap = { | |
| 195 ARTSC_DRIVER_NAME, "Analog Realtime Synthesizer", | |
| 196 Audio_Available, Audio_CreateDevice | |
| 197 }; | |
| 198 | |
| 199 /* This function waits until it is possible to write a full sound buffer */ | |
| 200 static void ARTSC_WaitAudio(_THIS) | |
| 201 { | |
| 202 Sint32 ticks; | |
| 203 | |
| 204 /* Check to see if the thread-parent process is still alive */ | |
| 205 { static int cnt = 0; | |
| 206 /* Note that this only works with thread implementations | |
| 207 that use a different process id for each thread. | |
| 208 */ | |
| 209 if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */ | |
| 210 if ( kill(parent, 0) < 0 ) { | |
| 211 this->enabled = 0; | |
| 212 } | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 /* Use timer for general audio synchronization */ | |
| 217 ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS; | |
| 218 if ( ticks > 0 ) { | |
| 219 SDL_Delay(ticks); | |
| 220 } | |
| 221 } | |
| 222 | |
| 223 static void ARTSC_PlayAudio(_THIS) | |
| 224 { | |
| 225 int written; | |
| 226 | |
| 227 /* Write the audio data */ | |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
228 written = SDL_NAME(arts_write)(stream, mixbuf, mixlen); |
| 0 | 229 |
| 230 /* If timer synchronization is enabled, set the next write frame */ | |
| 231 if ( frame_ticks ) { | |
| 232 next_frame += frame_ticks; | |
| 233 } | |
| 234 | |
| 235 /* If we couldn't write, assume fatal error for now */ | |
| 236 if ( written < 0 ) { | |
| 237 this->enabled = 0; | |
| 238 } | |
| 239 #ifdef DEBUG_AUDIO | |
| 240 fprintf(stderr, "Wrote %d bytes of audio data\n", written); | |
| 241 #endif | |
| 242 } | |
| 243 | |
| 244 static Uint8 *ARTSC_GetAudioBuf(_THIS) | |
| 245 { | |
| 246 return(mixbuf); | |
| 247 } | |
| 248 | |
| 249 static void ARTSC_CloseAudio(_THIS) | |
| 250 { | |
| 251 if ( mixbuf != NULL ) { | |
| 252 SDL_FreeAudioMem(mixbuf); | |
| 253 mixbuf = NULL; | |
| 254 } | |
| 255 if ( stream ) { | |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
256 SDL_NAME(arts_close_stream)(stream); |
| 0 | 257 stream = 0; |
| 258 } | |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
259 SDL_NAME(arts_free)(); |
| 0 | 260 } |
| 261 | |
| 262 static int ARTSC_OpenAudio(_THIS, SDL_AudioSpec *spec) | |
| 263 { | |
| 264 int bits, frag_spec; | |
| 265 Uint16 test_format, format; | |
| 266 | |
| 267 /* Reset the timer synchronization flag */ | |
| 268 frame_ticks = 0.0; | |
| 269 | |
| 270 mixbuf = NULL; | |
| 271 | |
| 272 /* Try for a closest match on audio format */ | |
| 273 format = 0; | |
| 274 bits = 0; | |
| 275 for ( test_format = SDL_FirstAudioFormat(spec->format); | |
| 276 ! format && test_format; ) { | |
| 277 #ifdef DEBUG_AUDIO | |
| 278 fprintf(stderr, "Trying format 0x%4.4x\n", test_format); | |
| 279 #endif | |
| 280 switch ( test_format ) { | |
| 281 case AUDIO_U8: | |
| 282 bits = 8; | |
| 283 format = 1; | |
| 284 break; | |
| 285 case AUDIO_S16LSB: | |
| 286 bits = 16; | |
| 287 format = 1; | |
| 288 break; | |
| 289 default: | |
| 290 format = 0; | |
| 291 break; | |
| 292 } | |
| 293 if ( ! format ) { | |
| 294 test_format = SDL_NextAudioFormat(); | |
| 295 } | |
| 296 } | |
| 297 if ( format == 0 ) { | |
| 298 SDL_SetError("Couldn't find any hardware audio formats"); | |
| 299 return(-1); | |
| 300 } | |
| 301 spec->format = test_format; | |
| 302 | |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
303 if ( SDL_NAME(arts_init)() != 0 ) { |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
304 SDL_SetError("Unable to initialize ARTS"); |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
305 return(-1); |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
306 } |
|
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
307 stream = SDL_NAME(arts_play_stream)(spec->freq, bits, spec->channels, "SDL"); |
| 0 | 308 |
| 309 /* Calculate the final parameters for this audio specification */ | |
| 310 SDL_CalculateAudioSpec(spec); | |
| 311 | |
| 312 /* Determine the power of two of the fragment size */ | |
| 313 for ( frag_spec = 0; (0x01<<frag_spec) < spec->size; ++frag_spec ); | |
| 314 if ( (0x01<<frag_spec) != spec->size ) { | |
| 315 SDL_SetError("Fragment size must be a power of two"); | |
| 316 return(-1); | |
| 317 } | |
| 318 frag_spec |= 0x00020000; /* two fragments, for low latency */ | |
| 319 | |
| 320 #ifdef ARTS_P_PACKET_SETTINGS | |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
321 SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_SETTINGS, frag_spec); |
| 0 | 322 #else |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
323 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
|
324 SDL_NAME(arts_stream_set)(stream, ARTS_P_PACKET_COUNT, frag_spec>>16); |
| 0 | 325 #endif |
|
294
d2d48e10f370
Added a new header file: SDL_loadso.h
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
326 spec->size = SDL_NAME(arts_stream_get)(stream, ARTS_P_PACKET_SIZE); |
| 0 | 327 |
| 328 /* Allocate mixing buffer */ | |
| 329 mixlen = spec->size; | |
| 330 mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen); | |
| 331 if ( mixbuf == NULL ) { | |
| 332 return(-1); | |
| 333 } | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1312
diff
changeset
|
334 SDL_memset(mixbuf, spec->silence, spec->size); |
| 0 | 335 |
| 336 /* Get the parent process id (we're the parent of the audio thread) */ | |
| 337 parent = getpid(); | |
| 338 | |
| 339 /* We're ready to rock and roll. :-) */ | |
| 340 return(0); | |
| 341 } |