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

annotate src/audio/alsa/SDL_alsa_audio.c @ 3818:49eadd6e8962 SDL-ryan-multiple-audio-device

Mangled ALSA dynamic loading...static loading will still work if you have the right libraries, but this is expected to break in general cases as we start dealing with different symbol versions, etc (but may work with, say, distro-specific packages, etc).

author	Ryan C. Gordon <icculus@icculus.org>
date	Fri, 06 Oct 2006 19:45:11 +0000
parents	c8b3d3d13ed1
children	b225d9820ee3

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
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	45 /* Audio driver functions */
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	46 static int ALSA_OpenAudio(_THIS, SDL_AudioSpec * spec);
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	47 static void ALSA_WaitAudio(_THIS);
30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	48 static void ALSA_PlayAudio(_THIS);
30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	49 static Uint8 *ALSA_GetAudioBuf(_THIS);
30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	50 static void ALSA_CloseAudio(_THIS);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	51
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	52 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	53 (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	54 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	55 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	56 (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	57 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	58 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	59 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	60 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	61 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	62 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	63 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	64 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	65 (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	66 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	67 (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	68 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	69 (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	70 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	71 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	72 (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	73 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	74 (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	75 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	76 (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	77 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	78 (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	79 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	80 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	81 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	82 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	83 (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	84 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	85 (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	86 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	87 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	88 #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	89 #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	90
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
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	92 #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	93
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	94 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	95 static void *alsa_handle = NULL;
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	96
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	97 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	98 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	99 {
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 #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	101 *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	102 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	103 #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	104 {
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 *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	106 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	107 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	108 }
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 }
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
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 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	112 }
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	113
1161 05d4b93b911e Placate gcc's strict aliasing rules with an extra cast. Ryan C. Gordon <icculus@icculus.org> parents: 942 diff changeset	114 /* 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	115 #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	116 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	117 #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	118 #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	119 #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	120
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 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	122 {
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	123 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	124 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	125 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	126 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	127 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	128 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	129 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	130 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	131 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	132 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	133 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	134 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	135 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	136 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	137 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	138 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	139 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	140 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	141 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	142 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	143 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	144 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	145 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	146 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	147 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	148 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	149 }
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	150
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	151 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	152 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	153 {
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	154 if (alsa_handle != NULL) {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	155 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	156 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	157 }
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	158 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	159
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	160 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	161 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	162 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	163 int i, retval = -1;
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	164
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	165 alsa_handle = dlopen(alsa_library, RTLD_NOW);
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	166 if (alsa_handle == 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	167 SDL_SetError("ALSA: dlopen('%s') failed: %s\n",
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	168 alsa_library, strerror(errno));
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	169 } 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	170 retval = load_alsa_syms();
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	171 if (retval < 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	172 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	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 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	183 return;
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	184 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	185
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	186 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	187 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	188 {
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	189 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	190 return 0;
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	191 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	192
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	193 #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	194
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	195 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	196 get_audio_device(int channels)
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	197 {
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	198 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	199
c121d94672cb SDL 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 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	201 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	202 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	203 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	204 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	205 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	206 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	207 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	208 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	209 return device;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	210 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	211
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	212 /* Audio driver bootstrap functions */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	213
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	214 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	215 Audio_Available(void)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	216 {
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	217 int available;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	218 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	219 snd_pcm_t *handle;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	220
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	221 available = 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	222 if (LoadALSALibrary() < 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	223 return available;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	224 }
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	225 status = ALSA_snd_pcm_open(&handle, get_audio_device(2),
49eadd6e8962 Mangled ALSA dynamic loading...static loading will still work if you have the Ryan C. Gordon <icculus@icculus.org> parents: 3798 diff changeset	226 SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
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	227 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	228 available = 1;
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	229 ALSA_snd_pcm_close(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	230 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	231 UnloadALSALibrary();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	232 return (available);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	233 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	234
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
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	236 Audio_DeleteDevice(SDL_AudioDevice * device)
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 SDL_free(device->hidden);
c121d94672cb SDL 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 SDL_free(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	240 UnloadALSALibrary();
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	241 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	242
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	243 static SDL_AudioDevice *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	244 Audio_CreateDevice(int devindex)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	245 {
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	246 SDL_AudioDevice *this;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	247
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	248 /* Initialize all variables that we clean on shutdown */
c121d94672cb SDL 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 LoadALSALibrary();
c121d94672cb SDL 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 this = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	251 if (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	252 SDL_memset(this, 0, (sizeof *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	253 this->hidden = (struct SDL_PrivateAudioData *)
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	254 SDL_malloc((sizeof *this->hidden));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	255 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	256 if ((this == NULL) \|\| (this->hidden == 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	257 SDL_OutOfMemory();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	258 if (this) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	259 SDL_free(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	260 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	261 return (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	262 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	263 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	264
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	265 /* Set the function pointers */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	266 this->OpenAudio = ALSA_OpenAudio;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	267 this->WaitAudio = ALSA_WaitAudio;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	268 this->PlayAudio = ALSA_PlayAudio;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	269 this->GetAudioBuf = ALSA_GetAudioBuf;
c121d94672cb SDL 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 this->CloseAudio = ALSA_CloseAudio;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	271
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	272 this->free = Audio_DeleteDevice;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	273
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	274 return this;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	275 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	276
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	277 AudioBootStrap ALSA_bootstrap = {
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	278 DRIVER_NAME, "ALSA 0.9 PCM audio",
3798 c8b3d3d13ed1 Audio bootstraps can now specify that a driver is only to be used if Ryan C. Gordon <icculus@icculus.org> parents: 2043 diff changeset	279 Audio_Available, Audio_CreateDevice, 0
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	280 };
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	281
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	282 /* 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	283 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	284 ALSA_WaitAudio(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	285 {
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	286 /* 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	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 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	289 /* 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	290 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	291 */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	292 if (parent && (((++cnt) % 10) == 0)) { /* Check every 10 loops */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	293 if (kill(parent, 0) < 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	294 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	295 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	296 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	297 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	298 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	299
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 /*
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	302 * 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	303 * "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	304 * 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	305 */
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	306 #define SWIZ6(T) \
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	307 T ptr = (T ) mixbuf; \
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	308 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	309 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	310 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	311 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	312 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	313 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	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
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	316 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	317 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	318 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	319 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	320 }
c121d94672cb SDL 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 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	322 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	323 {
c121d94672cb SDL 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 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	325 }
c121d94672cb SDL 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 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	327 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	328 {
c121d94672cb SDL 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 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	330 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	331 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	332 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	333 {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	334 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	335 }
1878 d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	336
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	337 #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	338
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	339
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	340 /*
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	341 * Called right before feeding this->mixbuf to the hardware. Swizzle channels
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	342 * from Windows/Mac order to the format alsalib will want.
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	343 */
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	344 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	345 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	346 {
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	347 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	348 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	349 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	350 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	351 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	352 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	353 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	354 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	355 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	356 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	357 }
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	358
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	359 /* !!! 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	360 }
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	361
d7c9d7f42881 Swizzle ALSA channels for 5.1 output to match DirectSound and CoreAudio. Ryan C. Gordon <icculus@icculus.org> parents: 1553 diff changeset	362
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	363 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	364 ALSA_PlayAudio(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	365 {
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	366 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	367 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	368 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	369
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	370 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	371
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	372 sample_len = this->spec.samples;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	373 sample_buf = (signed short *) 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	374
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	375 while (sample_len > 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	376 status = ALSA_snd_pcm_writei(pcm_handle, sample_buf, sample_len);
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	377 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	378 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	379 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	380 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	381 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	382 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	383 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	384 SDL_Delay(1);
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	385 status = ALSA_snd_pcm_resume(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	386 } 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	387 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	388 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	389 status = ALSA_snd_pcm_prepare(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	390 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	391 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	392 /* 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	393 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	394 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	395 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	396 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	397 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	398 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	399 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	400 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	401 }
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 static 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	404 ALSA_GetAudioBuf(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	405 {
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	406 return (mixbuf);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	407 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: 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 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	410 ALSA_CloseAudio(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	411 {
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	412 if (mixbuf != 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	413 SDL_FreeAudioMem(mixbuf);
c121d94672cb SDL 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 mixbuf = 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	415 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	416 if (pcm_handle) {
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	417 ALSA_snd_pcm_drain(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	418 ALSA_snd_pcm_close(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	419 pcm_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	420 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	421 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	422
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	423 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	424 ALSA_OpenAudio(_THIS, SDL_AudioSpec * spec)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	425 {
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 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	427 snd_pcm_hw_params_t *hwparams;
c121d94672cb SDL 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 snd_pcm_sw_params_t *swparams;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	429 snd_pcm_format_t 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	430 snd_pcm_uframes_t frames;
1982 3b4ce57c6215 First shot at new audio data types (int32 and float32). Ryan C. Gordon <icculus@icculus.org> parents: 1895 diff changeset	431 SDL_AudioFormat test_format;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	432
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	433 /* 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	434 /* 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	435 status = ALSA_snd_pcm_open(&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	436 get_audio_device(spec->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	437 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	438
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	439 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	440 SDL_SetError("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	441 ALSA_snd_strerror(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	442 return (-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	443 }
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	444
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	445 /* 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	446 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	447 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	448 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	449 SDL_SetError("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	450 ALSA_snd_strerror(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	451 ALSA_CloseAudio(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	452 return (-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	453 }
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	454
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	455 /* 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	456 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	457 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	458 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	459 SDL_SetError("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	460 ALSA_snd_strerror(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	461 ALSA_CloseAudio(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	462 return (-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	463 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	464
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	465 /* 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	466 status = -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	467 for (test_format = SDL_FirstAudioFormat(spec->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	468 test_format && (status < 0);) {
2043 adf732f1f016 Formatting update Sam Lantinga <slouken@libsdl.org> parents: 2010 diff changeset	469 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	470 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	471 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	472 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	473 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	474 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	475 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	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 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	478 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	479 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	480 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	481 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	482 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	483 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	484 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	485 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	486 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	487 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	488 break;
1995 0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	489 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	490 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	491 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	492 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	493 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	494 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	495 case AUDIO_F32LSB:
0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	496 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	497 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	498 case AUDIO_F32MSB:
0ca6ba107642 ALSA backend can handle int32 and float32 data directly. Ryan C. Gordon <icculus@icculus.org> parents: 1982 diff changeset	499 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	500 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	501 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	502 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	503 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	504 }
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	505 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	506 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	507 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	508 }
c121d94672cb SDL 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) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	510 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	511 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	512 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	513 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	514 SDL_SetError("Couldn't find any hardware audio formats");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	515 ALSA_CloseAudio(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	516 return (-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	517 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	518 spec->format = test_format;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	519
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	520 /* 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	521 status = ALSA_snd_pcm_hw_params_set_channels(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	522 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	523 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	524 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	525 if ((status <= 0) \|\| (status > 2)) {
c121d94672cb SDL 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 SDL_SetError("Couldn't set audio 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	527 ALSA_CloseAudio(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	528 return (-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	529 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	530 spec->channels = 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	531 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	532
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	533 /* Set the 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	534 status = ALSA_snd_pcm_hw_params_set_rate_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	535 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	536 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	537 ALSA_CloseAudio(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	538 SDL_SetError("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	539 ALSA_snd_strerror(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	540 return (-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	541 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	542 spec->freq = status;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	543
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	544 /* Set the buffer size, in samples */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	545 frames = 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	546 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	547 frames, 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	548 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	549 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	550
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 /* "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	552 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	553 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	554 ALSA_CloseAudio(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	555 SDL_SetError("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	556 ALSA_snd_strerror(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	557 return (-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	558 }
1552 b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	559
1553 63fa37538842 Left the debug code more explicit Sam Lantinga <slouken@libsdl.org> parents: 1552 diff changeset	560 /* This is useful for debugging... */
1552 b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	561 /*
1553 63fa37538842 Left the debug code more explicit Sam Lantinga <slouken@libsdl.org> parents: 1552 diff changeset	562 { snd_pcm_sframes_t bufsize; int fragments;
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	563 bufsize = ALSA_snd_pcm_hw_params_get_period_size(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	564 fragments = ALSA_snd_pcm_hw_params_get_periods(hwparams);
1552 b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	565
b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	566 fprintf(stderr, "ALSA: bufsize = %ld, fragments = %d\n", bufsize, fragments);
b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	567 }
b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	568 */
b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	569
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	570 /* 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	571 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	572 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	573 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	574 SDL_SetError("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	575 ALSA_snd_strerror(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	576 ALSA_CloseAudio(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	577 return (-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	578 }
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	579 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	580 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	581 SDL_SetError("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	582 ALSA_snd_strerror(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	583 ALSA_CloseAudio(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	584 return (-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	585 }
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	586 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	587 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	588 SDL_SetError("Couldn't set avail min: %s", ALSA_snd_strerror(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	589 ALSA_CloseAudio(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	590 return (-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	591 }
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	592 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	593 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	594 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	595 ALSA_snd_strerror(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	596 ALSA_CloseAudio(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	597 return (-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	598 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	599
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	600 /* Calculate the final parameters for this audio specification */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	601 SDL_CalculateAudioSpec(spec);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	602
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	603 /* Allocate mixing buffer */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	604 mixlen = spec->size;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	605 mixbuf = (Uint8 *) SDL_AllocAudioMem(mixlen);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	606 if (mixbuf == 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	607 ALSA_CloseAudio(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	608 return (-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	609 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	610 SDL_memset(mixbuf, spec->silence, spec->size);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	611
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	612 /* Get the parent process id (we're the parent of the audio 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	613 parent = getpid();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	614
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	615 /* 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	616 ALSA_snd_pcm_nonblock(pcm_handle, 0);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	617
1895 c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	618 /* We're ready to rock and roll. :-) */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head. Sam Lantinga <slouken@libsdl.org> parents: 1878 diff changeset	619 return (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	620 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	621
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	622 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate src/audio/alsa/SDL_alsa_audio.c @ 3818:49eadd6e8962 SDL-ryan-multiple-audio-device