Mercurial > sdl-ios-xcode

annotate src/audio/alsa/SDL_alsa_audio.c @ 2838:00356f22195a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fixed SDL_SetAlpha compatibility function to match the documentation
author Sam Lantinga <slouken@libsdl.org>
date Sat, 06 Dec 2008 05:49:53 +0000
parents 204be4fc2726
children 99210400e8b9
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
769
b8d311d90021 Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents: 765
diff changeset
3 Copyright (C) 1997-2004 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 */
1402
d910939febfa Use consistent identifiers for the various platforms we support.
Sam Lantinga <slouken@libsdl.org>
parents: 1379
diff changeset
22 #include "SDL_config.h"
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
23
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
24 /* Allow access to a raw mixing buffer */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
25
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
26 #include <sys/types.h>
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
27 #include <signal.h> /* For kill() */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
28 #include <dlfcn.h>
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
29 #include <errno.h>
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
30 #include <string.h>
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
31
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
32 #include "SDL_timer.h"
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
33 #include "SDL_audio.h"
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
34 #include "../SDL_audiomem.h"
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
35 #include "../SDL_audio_c.h"
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
36 #include "SDL_alsa_audio.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
37
865
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
38
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
39 /* The tag name used by ALSA audio */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
40 #define DRIVER_NAME "alsa"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
41
354
30935e76acb5 Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
42 /* The default ALSA audio driver */
765
4c2ba6161939 Editors Note: The original patch was modified to use SDL_Delay() instead of
Sam Lantinga <slouken@libsdl.org>
parents: 547
diff changeset
43 #define DEFAULT_DEVICE "default"
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
44
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
45 static int (*ALSA_snd_pcm_open)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
46 (snd_pcm_t **, const char *, snd_pcm_stream_t, int);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
47 static int (*ALSA_snd_pcm_close) (snd_pcm_t * pcm);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
48 static snd_pcm_sframes_t(*ALSA_snd_pcm_writei)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
49 (snd_pcm_t *, const void *, snd_pcm_uframes_t);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
50 static int (*ALSA_snd_pcm_resume) (snd_pcm_t *);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
51 static int (*ALSA_snd_pcm_prepare) (snd_pcm_t *);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
52 static int (*ALSA_snd_pcm_drain) (snd_pcm_t *);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
53 static const char *(*ALSA_snd_strerror) (int);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
54 static size_t(*ALSA_snd_pcm_hw_params_sizeof) (void);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
55 static size_t(*ALSA_snd_pcm_sw_params_sizeof) (void);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
56 static int (*ALSA_snd_pcm_hw_params_any) (snd_pcm_t *, snd_pcm_hw_params_t *);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
57 static int (*ALSA_snd_pcm_hw_params_set_access)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
58 (snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_access_t);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
59 static int (*ALSA_snd_pcm_hw_params_set_format)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
60 (snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_format_t);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
61 static int (*ALSA_snd_pcm_hw_params_set_channels)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
62 (snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
63 static int (*ALSA_snd_pcm_hw_params_get_channels) (const snd_pcm_hw_params_t
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
64 *);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
65 static unsigned int (*ALSA_snd_pcm_hw_params_set_rate_near)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
66 (snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int, int *);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
67 static snd_pcm_uframes_t(*ALSA_snd_pcm_hw_params_set_period_size_near)
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
68 (snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_uframes_t, int *);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
69 static snd_pcm_sframes_t(*ALSA_snd_pcm_hw_params_get_period_size)
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
70 (const snd_pcm_hw_params_t *);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
71 static unsigned int (*ALSA_snd_pcm_hw_params_set_periods_near)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
72 (snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int, int *);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
73 static int (*ALSA_snd_pcm_hw_params_get_periods) (snd_pcm_hw_params_t *);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
74 static int (*ALSA_snd_pcm_hw_params) (snd_pcm_t *, snd_pcm_hw_params_t *);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
75 static int (*ALSA_snd_pcm_sw_params_current) (snd_pcm_t *,
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
76 snd_pcm_sw_params_t *);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
77 static int (*ALSA_snd_pcm_sw_params_set_start_threshold)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
78 (snd_pcm_t *, snd_pcm_sw_params_t *, snd_pcm_uframes_t);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
79 static int (*ALSA_snd_pcm_sw_params_set_avail_min)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
80 (snd_pcm_t *, snd_pcm_sw_params_t *, snd_pcm_uframes_t);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
81 static int (*ALSA_snd_pcm_sw_params) (snd_pcm_t *, snd_pcm_sw_params_t *);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
82 static int (*ALSA_snd_pcm_nonblock) (snd_pcm_t *, int);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
83 #define snd_pcm_hw_params_sizeof ALSA_snd_pcm_hw_params_sizeof
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
84 #define snd_pcm_sw_params_sizeof ALSA_snd_pcm_sw_params_sizeof
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
85
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
86
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
87 #ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
865
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
88
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
89 static const char *alsa_library = SDL_AUDIO_DRIVER_ALSA_DYNAMIC;
865
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
90 static void *alsa_handle = NULL;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
91
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
92 static int
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
93 load_alsa_sym(const char *fn, void **addr)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
94 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
95 /*
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
96 * !!! FIXME:
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
97 * Eventually, this will deal with fallbacks, version changes, and
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
98 * missing symbols we can workaround. But for now, it doesn't.
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
99 */
865
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
100
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
101 #if HAVE_DLVSYM
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
102 *addr = dlvsym(alsa_handle, fn, "ALSA_0.9");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
103 if (*addr == NULL)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
104 #endif
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
105 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
106 *addr = dlsym(alsa_handle, fn);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
107 if (*addr == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
108 SDL_SetError("dlsym('%s') failed: %s", fn, strerror(errno));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
109 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
110 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
111 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
112
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
113 return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
114 }
865
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
115
1161
05d4b93b911e Placate gcc's strict aliasing rules with an extra cast.
Ryan C. Gordon <icculus@icculus.org>
parents: 942
diff changeset
116 /* cast funcs to char* first, to please GCC's strict aliasing rules. */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
117 #define SDL_ALSA_SYM(x) \
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
118 if (!load_alsa_sym(#x, (void **) (char *) &ALSA_##x)) return -1
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
119 #else
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
120 #define SDL_ALSA_SYM(x) ALSA_##x = x
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
121 #endif
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
122
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
123 static int
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
124 load_alsa_syms(void)
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
125 {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
126 SDL_ALSA_SYM(snd_pcm_open);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
127 SDL_ALSA_SYM(snd_pcm_close);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
128 SDL_ALSA_SYM(snd_pcm_writei);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
129 SDL_ALSA_SYM(snd_pcm_resume);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
130 SDL_ALSA_SYM(snd_pcm_prepare);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
131 SDL_ALSA_SYM(snd_pcm_drain);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
132 SDL_ALSA_SYM(snd_strerror);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
133 SDL_ALSA_SYM(snd_pcm_hw_params_sizeof);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
134 SDL_ALSA_SYM(snd_pcm_sw_params_sizeof);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
135 SDL_ALSA_SYM(snd_pcm_hw_params_any);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
136 SDL_ALSA_SYM(snd_pcm_hw_params_set_access);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
137 SDL_ALSA_SYM(snd_pcm_hw_params_set_format);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
138 SDL_ALSA_SYM(snd_pcm_hw_params_set_channels);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
139 SDL_ALSA_SYM(snd_pcm_hw_params_get_channels);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
140 SDL_ALSA_SYM(snd_pcm_hw_params_set_rate_near);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
141 SDL_ALSA_SYM(snd_pcm_hw_params_set_period_size_near);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
142 SDL_ALSA_SYM(snd_pcm_hw_params_get_period_size);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
143 SDL_ALSA_SYM(snd_pcm_hw_params_set_periods_near);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
144 SDL_ALSA_SYM(snd_pcm_hw_params_get_periods);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
145 SDL_ALSA_SYM(snd_pcm_hw_params);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
146 SDL_ALSA_SYM(snd_pcm_sw_params_current);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
147 SDL_ALSA_SYM(snd_pcm_sw_params_set_start_threshold);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
148 SDL_ALSA_SYM(snd_pcm_sw_params_set_avail_min);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
149 SDL_ALSA_SYM(snd_pcm_sw_params);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
150 SDL_ALSA_SYM(snd_pcm_nonblock);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
151 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
152 }
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
153
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
154 #undef SDL_ALSA_SYM
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
155
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
156 #ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
865
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
157
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
158 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
159 UnloadALSALibrary(void)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
160 {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
161 if (alsa_handle != NULL) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
162 dlclose(alsa_handle);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
163 alsa_handle = NULL;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
164 }
865
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
165 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
166
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
167 static int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
168 LoadALSALibrary(void)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
169 {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
170 int retval = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
171 if (alsa_handle == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
172 alsa_handle = dlopen(alsa_library, RTLD_NOW);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
173 if (alsa_handle == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
174 retval = -1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
175 SDL_SetError("ALSA: dlopen('%s') failed: %s\n",
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
176 alsa_library, strerror(errno));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
177 } else {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
178 retval = load_alsa_syms();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
179 if (retval < 0) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
180 UnloadALSALibrary();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
181 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
182 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
183 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
184 return retval;
865
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
185 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
186
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
187 #else
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
188
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
189 static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
190 UnloadALSALibrary(void)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
191 {
865
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
192 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
193
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
194 static int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
195 LoadALSALibrary(void)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
196 {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
197 load_alsa_syms();
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
198 return 0;
865
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
199 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
200
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents: 1358
diff changeset
201 #endif /* SDL_AUDIO_DRIVER_ALSA_DYNAMIC */
865
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
202
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
203 static const char *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
204 get_audio_device(int channels)
354
30935e76acb5 Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
205 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
206 const char *device;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
207
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
208 device = SDL_getenv("AUDIODEV"); /* Is there a standard variable name? */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
209 if (device == NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
210 if (channels == 6)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
211 device = "surround51";
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
212 else if (channels == 4)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
213 device = "surround40";
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
214 else
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
215 device = DEFAULT_DEVICE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
216 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
217 return device;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
218 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
219
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
220
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
221 /* This function waits until it is possible to write a full sound buffer */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
222 static void
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
223 ALSA_WaitDevice(_THIS)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
224 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
225 /* Check to see if the thread-parent process is still alive */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
226 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
227 static int cnt = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
228 /* Note that this only works with thread implementations
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
229 that use a different process id for each thread.
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
230 */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
231 /* Check every 10 loops */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
232 if (this->hidden->parent && (((++cnt) % 10) == 0)) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
233 if (kill(this->hidden->parent, 0) < 0) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
234 this->enabled = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
235 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
236 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
237 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
239
1878
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
240
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
241 /* !!! FIXME: is there a channel swizzler in alsalib instead? */
1878
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
242 /*
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
243 * http://bugzilla.libsdl.org/show_bug.cgi?id=110
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
244 * "For Linux ALSA, this is FL-FR-RL-RR-C-LFE
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
245 * and for Windows DirectX [and CoreAudio], this is FL-FR-C-LFE-RL-RR"
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
246 */
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
247 #define SWIZ6(T) \
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
248 T *ptr = (T *) this->hidden->mixbuf; \
1878
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
249 const Uint32 count = (this->spec.samples / 6); \
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
250 Uint32 i; \
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
251 for (i = 0; i < count; i++, ptr += 6) { \
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
252 T tmp; \
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
253 tmp = ptr[2]; ptr[2] = ptr[4]; ptr[4] = tmp; \
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
254 tmp = ptr[3]; ptr[3] = ptr[5]; ptr[5] = tmp; \
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
255 }
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
256
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
257 static __inline__ void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
258 swizzle_alsa_channels_6_64bit(_THIS)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
259 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
260 SWIZ6(Uint64);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
261 }
2735
204be4fc2726 Final merge of Google Summer of Code 2008 work...
Sam Lantinga <slouken@libsdl.org>
parents: 2060
diff changeset
262
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
263 static __inline__ void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
264 swizzle_alsa_channels_6_32bit(_THIS)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
265 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
266 SWIZ6(Uint32);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
267 }
2735
204be4fc2726 Final merge of Google Summer of Code 2008 work...
Sam Lantinga <slouken@libsdl.org>
parents: 2060
diff changeset
268
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
269 static __inline__ void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
270 swizzle_alsa_channels_6_16bit(_THIS)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
271 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
272 SWIZ6(Uint16);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
273 }
2735
204be4fc2726 Final merge of Google Summer of Code 2008 work...
Sam Lantinga <slouken@libsdl.org>
parents: 2060
diff changeset
274
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
275 static __inline__ void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
276 swizzle_alsa_channels_6_8bit(_THIS)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
277 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
278 SWIZ6(Uint8);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
279 }
1878
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
280
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
281 #undef SWIZ6
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
282
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
283
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
284 /*
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
285 * Called right before feeding this->hidden->mixbuf to the hardware. Swizzle
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
286 * channels from Windows/Mac order to the format alsalib will want.
1878
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
287 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
288 static __inline__ void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
289 swizzle_alsa_channels(_THIS)
1878
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
290 {
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
291 if (this->spec.channels == 6) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
292 const Uint16 fmtsize = (this->spec.format & 0xFF); /* bits/channel. */
1878
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
293 if (fmtsize == 16)
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
294 swizzle_alsa_channels_6_16bit(this);
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
295 else if (fmtsize == 8)
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
296 swizzle_alsa_channels_6_8bit(this);
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
297 else if (fmtsize == 32)
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
298 swizzle_alsa_channels_6_32bit(this);
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
299 else if (fmtsize == 64)
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
300 swizzle_alsa_channels_6_64bit(this);
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
301 }
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
302
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
303 /* !!! FIXME: update this for 7.1 if needed, later. */
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
304 }
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
305
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
306
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
307 static void
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
308 ALSA_PlayDevice(_THIS)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
310 int status;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
311 int sample_len;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
312 signed short *sample_buf;
765
4c2ba6161939 Editors Note: The original patch was modified to use SDL_Delay() instead of
Sam Lantinga <slouken@libsdl.org>
parents: 547
diff changeset
313
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
314 swizzle_alsa_channels(this);
1878
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
315
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
316 sample_len = this->spec.samples;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
317 sample_buf = (signed short *) this->hidden->mixbuf;
1878
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio.
Ryan C. Gordon <icculus@icculus.org>
parents: 1553
diff changeset
318
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
319 while (sample_len > 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
320 status = ALSA_snd_pcm_writei(this->hidden->pcm_handle,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
321 sample_buf, sample_len);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
322
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
323 if (status < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
324 if (status == -EAGAIN) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
325 SDL_Delay(1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
326 continue;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
327 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
328 if (status == -ESTRPIPE) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
329 do {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
330 SDL_Delay(1);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
331 status = ALSA_snd_pcm_resume(this->hidden->pcm_handle);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
332 } while (status == -EAGAIN);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
333 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
334 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
335 status = ALSA_snd_pcm_prepare(this->hidden->pcm_handle);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
336 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
337 if (status < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
338 /* Hmm, not much we can do - abort */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
339 this->enabled = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
340 return;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
341 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
342 continue;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
343 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
344 sample_buf += status * this->spec.channels;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
345 sample_len -= status;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
346 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
347 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
348
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
349 static Uint8 *
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
350 ALSA_GetDeviceBuf(_THIS)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
351 {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
352 return (this->hidden->mixbuf);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
353 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
354
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
355 static void
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
356 ALSA_CloseDevice(_THIS)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
357 {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
358 if (this->hidden != NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
359 if (this->hidden->mixbuf != NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
360 SDL_FreeAudioMem(this->hidden->mixbuf);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
361 this->hidden->mixbuf = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
362 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
363 if (this->hidden->pcm_handle) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
364 ALSA_snd_pcm_drain(this->hidden->pcm_handle);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
365 ALSA_snd_pcm_close(this->hidden->pcm_handle);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
366 this->hidden->pcm_handle = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
367 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
368 SDL_free(this->hidden);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
369 this->hidden = NULL;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
370 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
371 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
372
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
373 static int
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
374 ALSA_OpenDevice(_THIS, const char *devname, int iscapture)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
375 {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
376 int status = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
377 snd_pcm_t *pcm_handle = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
378 snd_pcm_hw_params_t *hwparams = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
379 snd_pcm_sw_params_t *swparams = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
380 snd_pcm_format_t format = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
381 snd_pcm_uframes_t frames = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
382 SDL_AudioFormat test_format = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
383
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
384 /* Initialize all variables that we clean on shutdown */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
385 this->hidden = (struct SDL_PrivateAudioData *)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
386 SDL_malloc((sizeof *this->hidden));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
387 if (this->hidden == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
388 SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
389 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
390 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
391 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
392
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
393 /* Open the audio device */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
394 /* Name of device should depend on # channels in spec */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
395 status = ALSA_snd_pcm_open(&pcm_handle,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
396 get_audio_device(this->spec.channels),
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
397 SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
942
41a59de7f2ed Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents: 939
diff changeset
398
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
399 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
400 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
401 SDL_SetError("ALSA: Couldn't open audio device: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
402 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
403 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
404 }
354
30935e76acb5 Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
405
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
406 this->hidden->pcm_handle = pcm_handle;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
407
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
408 /* Figure out what the hardware is capable of */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
409 snd_pcm_hw_params_alloca(&hwparams);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
410 status = ALSA_snd_pcm_hw_params_any(pcm_handle, hwparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
411 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
412 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
413 SDL_SetError("ALSA: Couldn't get hardware config: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
414 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
415 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
416 }
354
30935e76acb5 Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
417
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
418 /* SDL only uses interleaved sample output */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
419 status = ALSA_snd_pcm_hw_params_set_access(pcm_handle, hwparams,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
420 SND_PCM_ACCESS_RW_INTERLEAVED);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
421 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
422 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
423 SDL_SetError("ALSA: Couldn't set interleaved access: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
424 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
425 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
426 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
427
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
428 /* Try for a closest match on audio format */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
429 status = -1;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
430 for (test_format = SDL_FirstAudioFormat(this->spec.format);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
431 test_format && (status < 0);) {
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
432 status = 0; /* if we can't support a format, it'll become -1. */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
433 switch (test_format) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
434 case AUDIO_U8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
435 format = SND_PCM_FORMAT_U8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
436 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
437 case AUDIO_S8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
438 format = SND_PCM_FORMAT_S8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
439 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
440 case AUDIO_S16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
441 format = SND_PCM_FORMAT_S16_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
442 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
443 case AUDIO_S16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
444 format = SND_PCM_FORMAT_S16_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
445 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
446 case AUDIO_U16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
447 format = SND_PCM_FORMAT_U16_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
448 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
449 case AUDIO_U16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
450 format = SND_PCM_FORMAT_U16_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
451 break;
1995
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
452 case AUDIO_S32LSB:
2010
39897da56f63 Whoops, wrong tokens for int32 support in ALSA driver (specified unsigned
Ryan C. Gordon <icculus@icculus.org>
parents: 2009
diff changeset
453 format = SND_PCM_FORMAT_S32_LE;
1995
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
454 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
455 case AUDIO_S32MSB:
2010
39897da56f63 Whoops, wrong tokens for int32 support in ALSA driver (specified unsigned
Ryan C. Gordon <icculus@icculus.org>
parents: 2009
diff changeset
456 format = SND_PCM_FORMAT_S32_BE;
1995
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
457 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
458 case AUDIO_F32LSB:
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
459 format = SND_PCM_FORMAT_FLOAT_LE;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
460 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
461 case AUDIO_F32MSB:
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
462 format = SND_PCM_FORMAT_FLOAT_BE;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
463 break;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
464 default:
2009
f2058fb367e4 ALSA was testing if (format) was set to zero as an error condition, but
Ryan C. Gordon <icculus@icculus.org>
parents: 1995
diff changeset
465 status = -1;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
466 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
467 }
2009
f2058fb367e4 ALSA was testing if (format) was set to zero as an error condition, but
Ryan C. Gordon <icculus@icculus.org>
parents: 1995
diff changeset
468 if (status >= 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
469 status = ALSA_snd_pcm_hw_params_set_format(pcm_handle,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
470 hwparams, format);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
471 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
472 if (status < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
473 test_format = SDL_NextAudioFormat();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
474 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
475 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
476 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
477 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
478 SDL_SetError("ALSA: Couldn't find any hardware audio formats");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
479 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
480 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
481 this->spec.format = test_format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
482
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
483 /* Set the number of channels */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
484 status = ALSA_snd_pcm_hw_params_set_channels(pcm_handle, hwparams,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
485 this->spec.channels);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
486 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
487 status = ALSA_snd_pcm_hw_params_get_channels(hwparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
488 if ((status <= 0) || (status > 2)) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
489 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
490 SDL_SetError("ALSA: Couldn't set audio channels");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
491 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
492 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
493 this->spec.channels = status;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
494 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
495
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
496 /* Set the audio rate */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
497 status = ALSA_snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
498 this->spec.freq, NULL);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
499 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
500 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
501 SDL_SetError("ALSA: Couldn't set audio frequency: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
502 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
503 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
504 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
505 this->spec.freq = status;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
506
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
507 /* Set the buffer size, in samples */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
508 frames = this->spec.samples;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
509 frames = ALSA_snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
510 frames, NULL);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
511 this->spec.samples = frames;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
512 ALSA_snd_pcm_hw_params_set_periods_near(pcm_handle, hwparams, 2, NULL);
354
30935e76acb5 Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
513
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
514 /* "set" the hardware with the desired parameters */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
515 status = ALSA_snd_pcm_hw_params(pcm_handle, hwparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
516 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
517 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
518 SDL_SetError("ALSA: Couldn't set hardware audio parameters: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
519 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
520 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
521 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
522 #if AUDIO_DEBUG
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
523 {
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
524 snd_pcm_sframes_t bufsize;
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
525 int fragments;
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
526 bufsize = ALSA_snd_pcm_hw_params_get_period_size(hwparams);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
527 fragments = ALSA_snd_pcm_hw_params_get_periods(hwparams);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
528 fprintf(stderr, "ALSA: bufsize = %ld, fragments = %d\n", bufsize,
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
529 fragments);
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
530 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
531 #endif
1552
b2462b772cce Fixed bug #79
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
532
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
533 /* Set the software parameters */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
534 snd_pcm_sw_params_alloca(&swparams);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
535 status = ALSA_snd_pcm_sw_params_current(pcm_handle, swparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
536 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
537 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
538 SDL_SetError("ALSA: Couldn't get software config: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
539 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
540 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
541 }
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
542 status =
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
543 ALSA_snd_pcm_sw_params_set_start_threshold(pcm_handle, swparams, 0);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
544 if (status < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
545 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
546 SDL_SetError("ALSA: Couldn't set start threshold: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
547 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
548 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
549 }
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
550 status =
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
551 ALSA_snd_pcm_sw_params_set_avail_min(pcm_handle, swparams, frames);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
552 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
553 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
554 SDL_SetError("Couldn't set avail min: %s", ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
555 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
556 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
557 status = ALSA_snd_pcm_sw_params(pcm_handle, swparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
558 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
559 ALSA_CloseDevice(this);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
560 SDL_SetError("Couldn't set software audio parameters: %s",
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
561 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
562 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
563 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
564
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
565 /* Calculate the final parameters for this audio specification */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
566 SDL_CalculateAudioSpec(&this->spec);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
567
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
568 /* Allocate mixing buffer */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
569 this->hidden->mixlen = this->spec.size;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
570 this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
571 if (this->hidden->mixbuf == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
572 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
573 SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
574 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
575 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
576 SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
577
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
578 /* Get the parent process id (we're the parent of the audio thread) */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
579 this->hidden->parent = getpid();
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
580
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
581 /* Switch to blocking mode for playback */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
582 ALSA_snd_pcm_nonblock(pcm_handle, 0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
583
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
584 /* We're ready to rock and roll. :-) */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
585 return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
586 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
587
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
588 static void
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
589 ALSA_Deinitialize(void)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
590 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
591 UnloadALSALibrary();
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
592 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
593
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
594 static int
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
595 ALSA_Init(SDL_AudioDriverImpl * impl)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
596 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
597 if (LoadALSALibrary() < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
598 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
599 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
600
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
601 /* Set the function pointers */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
602 impl->OpenDevice = ALSA_OpenDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
603 impl->WaitDevice = ALSA_WaitDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
604 impl->GetDeviceBuf = ALSA_GetDeviceBuf;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
605 impl->PlayDevice = ALSA_PlayDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
606 impl->CloseDevice = ALSA_CloseDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
607 impl->Deinitialize = ALSA_Deinitialize;
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
608 impl->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME: Add device enum! */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
609
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
610 return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
611 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
612
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
613
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
614 AudioBootStrap ALSA_bootstrap = {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
615 DRIVER_NAME, "ALSA 0.9 PCM audio", ALSA_Init, 0
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
616 };
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
617
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
618 /* vi: set ts=4 sw=4 expandtab: */