sdl-ios-xcode: src/audio/alsa/SDL_alsa

annotate src/audio/alsa/SDL_alsa_audio.c @ 3822:748707e2ddd1 SDL-ryan-multiple-audio-device

Minor NAS tweak.

author	Ryan C. Gordon <icculus@icculus.org>
date	Sat, 07 Oct 2006 06:17:54 +0000
parents	b225d9820ee3
children	25052dd25810

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() */
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	28 #include <dlfcn.h>
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	29 #include <errno.h>
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 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
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	45 static int (*ALSA_snd_pcm_open)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	46 (snd_pcm_t *, const char , snd_pcm_stream_t, int);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	47 static int (ALSA_snd_pcm_close)(snd_pcm_t pcm);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	48 static snd_pcm_sframes_t(*ALSA_snd_pcm_writei)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	49 (snd_pcm_t ,const void , snd_pcm_uframes_t);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	50 static int (ALSA_snd_pcm_resume)(snd_pcm_t );
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	51 static int (ALSA_snd_pcm_prepare)(snd_pcm_t );
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	52 static int (ALSA_snd_pcm_drain)(snd_pcm_t );
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	53 static const char (ALSA_snd_strerror)(int);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	54 static size_t(*ALSA_snd_pcm_hw_params_sizeof)(void);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	55 static size_t(*ALSA_snd_pcm_sw_params_sizeof)(void);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	56 static int (ALSA_snd_pcm_hw_params_any)(snd_pcm_t , snd_pcm_hw_params_t *);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	57 static int (*ALSA_snd_pcm_hw_params_set_access)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	58 (snd_pcm_t , snd_pcm_hw_params_t , snd_pcm_access_t);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	59 static int (*ALSA_snd_pcm_hw_params_set_format)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	60 (snd_pcm_t , snd_pcm_hw_params_t , snd_pcm_format_t);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	61 static int (*ALSA_snd_pcm_hw_params_set_channels)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	62 (snd_pcm_t , snd_pcm_hw_params_t , unsigned int);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	63 static int (ALSA_snd_pcm_hw_params_get_channels)(const snd_pcm_hw_params_t );
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	64 static unsigned int (*ALSA_snd_pcm_hw_params_set_rate_near)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	65 (snd_pcm_t , snd_pcm_hw_params_t , unsigned int, int *);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	66 static snd_pcm_uframes_t (*ALSA_snd_pcm_hw_params_set_period_size_near)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	67 (snd_pcm_t , snd_pcm_hw_params_t , snd_pcm_uframes_t, int *);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	68 static snd_pcm_sframes_t (*ALSA_snd_pcm_hw_params_get_period_size)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	69 (const snd_pcm_hw_params_t *);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	70 static unsigned int (*ALSA_snd_pcm_hw_params_set_periods_near)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	71 (snd_pcm_t ,snd_pcm_hw_params_t , unsigned int, int *);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	72 static int (ALSA_snd_pcm_hw_params_get_periods)(snd_pcm_hw_params_t );
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	73 static int (ALSA_snd_pcm_hw_params)(snd_pcm_t , snd_pcm_hw_params_t *);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	74 static int (ALSA_snd_pcm_sw_params_current)(snd_pcm_t, snd_pcm_sw_params_t*);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	75 static int (*ALSA_snd_pcm_sw_params_set_start_threshold)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	76 (snd_pcm_t , snd_pcm_sw_params_t , snd_pcm_uframes_t);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	77 static int (*ALSA_snd_pcm_sw_params_set_avail_min)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	78 (snd_pcm_t , snd_pcm_sw_params_t , snd_pcm_uframes_t);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	79 static int (ALSA_snd_pcm_sw_params)(snd_pcm_t , snd_pcm_sw_params_t *);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	80 static int (ALSA_snd_pcm_nonblock)(snd_pcm_t , int);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	81 #define snd_pcm_hw_params_sizeof ALSA_snd_pcm_hw_params_sizeof
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	82 #define snd_pcm_sw_params_sizeof ALSA_snd_pcm_sw_params_sizeof
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	83
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	84
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	85 #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	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 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	88 static void *alsa_handle = NULL;
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	89
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	90 static int
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	91 load_alsa_sym(const char fn, void *addr)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	92 {
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	93 #if HAVE_DLVSYM
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	94 *addr = dlvsym(alsa_handle, fn, "ALSA_0.9");
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	95 if (*addr == NULL)
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	96 #endif
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	97 {
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	98 *addr = dlsym(alsa_handle, fn);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	99 if (*addr == NULL) {
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	100 return 0;
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	101 }
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	102 }
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	103
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	104 return 1;
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	105 }
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	106
1161 05d4b93b911e Placate gcc's strict aliasing rules with an extra cast. Ryan C. Gordon <icculus@icculus.org> parents: 942 diff changeset	107 /* cast funcs to char* first, to please GCC's strict aliasing rules. */
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	108 #define SDL_ALSA_SYM(x) \
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	109 if (!load_alsa_sym(#x, (void *) (char ) &ALSA_##x)) return -1
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	110 #else
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	111 #define SDL_ALSA_SYM(x) ALSA_##x = x
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	112 #endif
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	113
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	114 static int 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	115 {
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	116 SDL_ALSA_SYM(snd_pcm_open);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	117 SDL_ALSA_SYM(snd_pcm_close);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	118 SDL_ALSA_SYM(snd_pcm_writei);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	119 SDL_ALSA_SYM(snd_pcm_resume);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	120 SDL_ALSA_SYM(snd_pcm_prepare);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	121 SDL_ALSA_SYM(snd_pcm_drain);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	122 SDL_ALSA_SYM(snd_strerror);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	123 SDL_ALSA_SYM(snd_pcm_hw_params_sizeof);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	124 SDL_ALSA_SYM(snd_pcm_sw_params_sizeof);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	125 SDL_ALSA_SYM(snd_pcm_hw_params_any);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	126 SDL_ALSA_SYM(snd_pcm_hw_params_set_access);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	127 SDL_ALSA_SYM(snd_pcm_hw_params_set_format);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	128 SDL_ALSA_SYM(snd_pcm_hw_params_set_channels);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	129 SDL_ALSA_SYM(snd_pcm_hw_params_get_channels);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	130 SDL_ALSA_SYM(snd_pcm_hw_params_set_rate_near);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	131 SDL_ALSA_SYM(snd_pcm_hw_params_set_period_size_near);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	132 SDL_ALSA_SYM(snd_pcm_hw_params_get_period_size);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	133 SDL_ALSA_SYM(snd_pcm_hw_params_set_periods_near);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	134 SDL_ALSA_SYM(snd_pcm_hw_params_get_periods);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	135 SDL_ALSA_SYM(snd_pcm_hw_params);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	136 SDL_ALSA_SYM(snd_pcm_sw_params_current);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	137 SDL_ALSA_SYM(snd_pcm_sw_params_set_start_threshold);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	138 SDL_ALSA_SYM(snd_pcm_sw_params_set_avail_min);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	139 SDL_ALSA_SYM(snd_pcm_sw_params);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	140 SDL_ALSA_SYM(snd_pcm_nonblock);
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	141 return 0;
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	142 }
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	143
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	144 #ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	145
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	146 static int library_load_count = 0;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	147
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	148 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	149 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	150 {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	151 if ((alsa_handle != NULL) && (--library_load_count == 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	152 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	153 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	154 }
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	155 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	156
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	157 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	158 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	159 {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	160 int retval = 0;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	161 if (library_load_count++ == 0) {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	162 alsa_handle = dlopen(alsa_library, RTLD_NOW);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	163 if (alsa_handle == NULL) {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	164 library_load_count--;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	165 retval = -1;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	166 SDL_SetError("ALSA: dlopen('%s') failed: %s\n",
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	167 alsa_library, strerror(errno));
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	168 } else {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	169 retval = load_alsa_syms();
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	170 if (retval < 0) {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	171 UnloadALSALibrary();
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	172 }
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	173 }
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	174 }
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	175 return retval;
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	176 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	177
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	178 #else
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	179
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 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	181 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	182 {
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	183 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	184
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	185 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	186 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	187 {
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	188 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	189 return 0;
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	190 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	191
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	192 #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	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 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	195 get_audio_device(int channels)
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	196 {
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	197 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	198
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	199 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	200 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	201 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	202 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	203 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	204 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	205 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	206 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	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 return device;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	209 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	210
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	211
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	212 static int
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	213 ALSA_Available(void)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	214 {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	215 int available = 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	216 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	217 snd_pcm_t *handle;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	218
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	219 if (LoadALSALibrary() >= 0) {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	220 int status = ALSA_snd_pcm_open(&handle, get_audio_device(2),
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	221 SND_PCM_STREAM_PLAYBACK,
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	222 SND_PCM_NONBLOCK);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	223 if (status >= 0) {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	224 available = 1;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	225 ALSA_snd_pcm_close(handle);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	226 }
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	227 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	228 }
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 return (available);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	230 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	231
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	232
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	233
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	234 /* 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	235 static void
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	236 ALSA_WaitDevice(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	237 {
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	238 /* 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	239 {
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	240 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	241 /* 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	242 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	243 */
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	244 /* Check every 10 loops */
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	245 if (this->hidden->parent && (((++cnt) % 10) == 0)) {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	246 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	247 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	248 }
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	249 }
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	250 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	251 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	252
1878 d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	253
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	254 /* !!! 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	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 * 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	257 * "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	258 * 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	259 */
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	260 #define SWIZ6(T) \
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	261 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	262 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	263 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	264 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	265 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	266 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	267 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	268 }
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	269
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	270 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	271 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	272 {
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 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	274 }
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_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	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(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	279 }
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	280 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	281 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	282 {
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	283 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	284 }
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	285 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	286 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	287 {
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 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	289 }
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 #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	292
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	293
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	294 /*
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	295 * Called right before feeding this->hidden->mixbuf to the hardware. Swizzle
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	296 * 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	297 */
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	298 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	299 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	300 {
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	301 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	302 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	303 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	304 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	305 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	306 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	307 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	308 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	309 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	310 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	311 }
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	312
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	313 /* !!! 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	314 }
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	315
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	316
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	317 static void
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	318 ALSA_PlayDevice(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	319 {
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	320 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	321 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	322 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	323
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	324 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	325
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	326 sample_len = this->spec.samples;
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	327 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	328
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	329 while (sample_len > 0) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	330 status = ALSA_snd_pcm_writei(this->hidden->pcm_handle,
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	331 sample_buf, sample_len);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	332
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	333 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	334 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	335 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	336 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	337 }
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 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	339 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	340 SDL_Delay(1);
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	341 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	342 } 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	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 if (status < 0) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	345 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	346 }
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	347 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	348 /* 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	349 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	350 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	351 }
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	352 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	353 }
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	354 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	355 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	356 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	357 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	358
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	359 static Uint8 *
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	360 ALSA_GetDeviceBuf(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	361 {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	362 return (this->hidden->mixbuf);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	363 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	364
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	365 static void
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	366 ALSA_CloseDevice(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	367 {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	368 if (this->hidden != NULL) {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	369 if (this->hidden->mixbuf != NULL) {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	370 SDL_FreeAudioMem(this->hidden->mixbuf);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	371 this->hidden->mixbuf = NULL;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	372 }
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	373 if (this->hidden->pcm_handle) {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	374 ALSA_snd_pcm_drain(this->hidden->pcm_handle);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	375 ALSA_snd_pcm_close(this->hidden->pcm_handle);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	376 this->hidden->pcm_handle = NULL;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	377 }
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	378 SDL_free(this->hidden);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	379 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	380 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	381 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	382
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	383 static int
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	384 ALSA_OpenDevice(_THIS, const char *devname, int iscapture)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	385 {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	386 int status = 0;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	387 snd_pcm_t *pcm_handle = NULL;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	388 snd_pcm_hw_params_t *hwparams = NULL;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	389 snd_pcm_sw_params_t *swparams = NULL;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	390 snd_pcm_format_t format = 0;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	391 snd_pcm_uframes_t frames = 0;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	392 SDL_AudioFormat test_format = 0;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	393
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	394 /* Initialize all variables that we clean on shutdown */
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	395 this->hidden = (struct SDL_PrivateAudioData *)
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	396 SDL_malloc((sizeof *this->hidden));
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	397 if (this->hidden == NULL) {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	398 SDL_OutOfMemory();
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	399 return 0;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	400 }
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	401 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	402
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	403 /* 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	404 /* Name of device should depend on # channels in spec */
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	405 status = ALSA_snd_pcm_open(&pcm_handle,
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	406 get_audio_device(this->spec.channels),
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	407 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	408
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	409 if (status < 0) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	410 ALSA_CloseDevice(this);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	411 SDL_SetError("ALSA: Couldn't open audio device: %s",
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	412 ALSA_snd_strerror(status));
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	413 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	414 }
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	415
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	416 this->hidden->pcm_handle = pcm_handle;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 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 /* 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	419 snd_pcm_hw_params_alloca(&hwparams);
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	420 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	421 if (status < 0) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	422 ALSA_CloseDevice(this);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	423 SDL_SetError("ALSA: Couldn't get hardware config: %s",
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	424 ALSA_snd_strerror(status));
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 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 }
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 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 /* SDL only uses interleaved sample output */
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	429 status = ALSA_snd_pcm_hw_params_set_access(pcm_handle, hwparams,
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	430 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	431 if (status < 0) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	432 ALSA_CloseDevice(this);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	433 SDL_SetError("ALSA: Couldn't set interleaved access: %s",
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	434 ALSA_snd_strerror(status));
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	435 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	436 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	437
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	438 /* 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	439 status = -1;
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	440 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	441 test_format && (status < 0);) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	442 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	443 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	444 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	445 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	446 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	447 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	448 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	449 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	450 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	451 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	452 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	453 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	454 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	455 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	456 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	457 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	458 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	459 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	460 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	461 break;
1995 0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	462 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	463 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	464 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	465 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	466 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	467 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	468 case AUDIO_F32LSB:
0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	469 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	470 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	471 case AUDIO_F32MSB:
0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	472 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	473 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	474 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	475 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	476 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	477 }
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	478 if (status >= 0) {
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	479 status = ALSA_snd_pcm_hw_params_set_format(pcm_handle,
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	480 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	481 }
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	482 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	483 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	484 }
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	485 }
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) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	487 ALSA_CloseDevice(this);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	488 SDL_SetError("ALSA: Couldn't find any hardware audio formats");
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	489 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	490 }
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	491 this->spec.format = test_format;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	492
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	493 /* Set the number of channels */
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	494 status = ALSA_snd_pcm_hw_params_set_channels(pcm_handle, hwparams,
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	495 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	496 if (status < 0) {
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	497 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	498 if ((status <= 0) \|\| (status > 2)) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	499 ALSA_CloseDevice(this);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	500 SDL_SetError("ALSA: Couldn't set audio channels");
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	501 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	502 }
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	503 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	504 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	505
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	506 /* Set the audio rate */
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	507 status = ALSA_snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams,
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	508 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	509 if (status < 0) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	510 ALSA_CloseDevice(this);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	511 SDL_SetError("ALSA: Couldn't set audio frequency: %s",
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	512 ALSA_snd_strerror(status));
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	513 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	514 }
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	515 this->spec.freq = status;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	516
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	517 /* Set the buffer size, in samples */
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	518 frames = this->spec.samples;
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	519 frames = ALSA_snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams,
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	520 frames, NULL);
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	521 this->spec.samples = frames;
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	522 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	523
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	524 /* "set" the hardware with the desired parameters */
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	525 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	526 if (status < 0) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	527 ALSA_CloseDevice(this);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	528 SDL_SetError("ALSA: Couldn't set hardware audio parameters: %s",
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	529 ALSA_snd_strerror(status));
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	530 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	531 }
1552 b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	532
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	533 #if AUDIO_DEBUG
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	534 {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	535 snd_pcm_sframes_t bufsize;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	536 int fragments;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	537 bufsize = ALSA_snd_pcm_hw_params_get_period_size(hwparams);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	538 fragments = ALSA_snd_pcm_hw_params_get_periods(hwparams);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	539 fprintf(stderr,"ALSA: bufsize = %ld, fragments = %d\n",bufsize,fragments);
1552 b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	540 }
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	541 #endif
1552 b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	542
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	543 /* 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	544 snd_pcm_sw_params_alloca(&swparams);
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	545 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	546 if (status < 0) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	547 ALSA_CloseDevice(this);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	548 SDL_SetError("ALSA: Couldn't get software config: %s",
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	549 ALSA_snd_strerror(status));
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	550 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	551 }
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	552 status = ALSA_snd_pcm_sw_params_set_start_threshold(pcm_handle,swparams,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	553 if (status < 0) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	554 ALSA_CloseDevice(this);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	555 SDL_SetError("ALSA: Couldn't set start threshold: %s",
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	556 ALSA_snd_strerror(status));
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	557 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	558 }
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	559 status = 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	560 if (status < 0) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	561 ALSA_CloseDevice(this);
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	562 SDL_SetError("Couldn't set avail min: %s", ALSA_snd_strerror(status));
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	563 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	564 }
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	565 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	566 if (status < 0) {
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	567 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	568 SDL_SetError("Couldn't set software audio parameters: %s",
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	569 ALSA_snd_strerror(status));
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	570 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	571 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	572
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	573 /* Calculate the final parameters for this audio specification */
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	574 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	575
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	576 /* Allocate mixing buffer */
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	577 this->hidden->mixlen = this->spec.size;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	578 this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	579 if (this->hidden->mixbuf == NULL) {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	580 ALSA_CloseDevice(this);
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	581 SDL_OutOfMemory();
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	582 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	583 }
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	584 SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	585
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	586 /* Get the parent process id (we're the parent of the audio thread) */
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	587 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	588
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	589 /* Switch to blocking mode for playback */
3818 49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	590 ALSA_snd_pcm_nonblock(pcm_handle, 0);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	591
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 /* We're ready to rock and roll. :-) */
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	593 return 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	594 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	595
3819 b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	596 static int
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	597 ALSA_Init(SDL_AudioDriverImpl *impl)
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	598 {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	599 /* Set the function pointers */
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	600 impl->OpenDevice = ALSA_OpenDevice;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	601 impl->WaitDevice = ALSA_WaitDevice;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	602 impl->GetDeviceBuf = ALSA_GetDeviceBuf;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	603 impl->PlayDevice = ALSA_PlayDevice;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	604 impl->CloseDevice = ALSA_CloseDevice;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	605 impl->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME: Add device enum! */
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	606
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	607 return 1;
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	608 }
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	609
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	610
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	611 AudioBootStrap ALSA_bootstrap = {
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	612 DRIVER_NAME, "ALSA 0.9 PCM audio",
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	613 ALSA_Available, ALSA_Init, 0
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	614 };
b225d9820ee3 Updated a bunch of audio backends to 1.3 API (Dreamcast, OS/2, ALSA, and Ryan C. Gordon <icculus@icculus.org> parents: 3818 diff changeset	615
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	616 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate src/audio/alsa/SDL_alsa_audio.c @ 3822:748707e2ddd1 SDL-ryan-multiple-audio-device