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

annotate src/audio/alsa/SDL_alsa_audio.c @ 1702:a7ad7081b977 SDL-1.3

Merged Ryan's 5.1 audio fix from SDL 1.2

author	Sam Lantinga <slouken@libsdl.org>
date	Fri, 23 Jun 2006 09:01:08 +0000
parents	4da1ee79c9af
children

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>
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	27 #include <signal.h> /* For kill() */
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	28
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	29 #include "SDL_timer.h"
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	30 #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	31 #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	32 #include "../SDL_audio_c.h"
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	33 #include "SDL_alsa_audio.h"
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	34
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	35 #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	36 #include <dlfcn.h>
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	37 #include "SDL_name.h"
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	38 #include "SDL_loadso.h"
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	39 #else
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	40 #define SDL_NAME(X) X
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	41 #endif
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	42
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	43
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	44 /* The tag name used by ALSA audio */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	45 #define DRIVER_NAME "alsa"
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	46
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	47 /* 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	48 #define DEFAULT_DEVICE "default"
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	49
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	50 /* Audio driver functions */
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	51 static int ALSA_OpenAudio(_THIS, SDL_AudioSpec * spec);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	52 static void ALSA_WaitAudio(_THIS);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	53 static void ALSA_PlayAudio(_THIS);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	54 static Uint8 *ALSA_GetAudioBuf(_THIS);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	55 static void ALSA_CloseAudio(_THIS);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	56
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	57 #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	58
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	59 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	60 static void *alsa_handle = NULL;
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	61 static int alsa_loaded = 0;
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	62
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	63 static int (SDL_snd_pcm_open) (snd_pcm_t * pcm, const char *name,
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	64 snd_pcm_stream_t stream, int mode);
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	65 static int (SDL_NAME(snd_pcm_open)) (snd_pcm_t * pcm, const char *name,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	66 snd_pcm_stream_t stream, int mode);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	67 static int (SDL_NAME(snd_pcm_close)) (snd_pcm_t pcm);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	68 static snd_pcm_sframes_t(SDL_NAME(snd_pcm_writei)) (snd_pcm_t pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	69 const void *buffer,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	70 snd_pcm_uframes_t size);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	71 static int (SDL_NAME(snd_pcm_resume)) (snd_pcm_t pcm);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	72 static int (SDL_NAME(snd_pcm_prepare)) (snd_pcm_t pcm);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	73 static int (SDL_NAME(snd_pcm_drain)) (snd_pcm_t pcm);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	74 static const char (SDL_NAME(snd_strerror)) (int errnum);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	75 static size_t(*SDL_NAME(snd_pcm_hw_params_sizeof)) (void);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	76 static size_t(*SDL_NAME(snd_pcm_sw_params_sizeof)) (void);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	77 static int (SDL_NAME(snd_pcm_hw_params_any)) (snd_pcm_t pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	78 snd_pcm_hw_params_t * params);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	79 static int (SDL_NAME(snd_pcm_hw_params_set_access)) (snd_pcm_t pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	80 snd_pcm_hw_params_t *
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	81 params,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	82 snd_pcm_access_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	83 access);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	84 static int (SDL_NAME(snd_pcm_hw_params_set_format)) (snd_pcm_t pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	85 snd_pcm_hw_params_t *
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	86 params,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	87 snd_pcm_format_t val);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	88 static int (SDL_NAME(snd_pcm_hw_params_set_channels)) (snd_pcm_t pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	89 snd_pcm_hw_params_t *
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	90 params,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	91 unsigned int val);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	92 static int (*SDL_NAME(snd_pcm_hw_params_get_channels)) (const
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	93 snd_pcm_hw_params_t *
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	94 params);
1663 11775724e3fe fine tuning indent output Sam Lantinga <slouken@libsdl.org> parents: 1662 diff changeset	95 static unsigned int
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	96 (SDL_NAME(snd_pcm_hw_params_set_rate_near)) (snd_pcm_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	97 pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	98 snd_pcm_hw_params_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	99 * params,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	100 unsigned int val, int *dir);
1663 11775724e3fe fine tuning indent output Sam Lantinga <slouken@libsdl.org> parents: 1662 diff changeset	101 static snd_pcm_uframes_t
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	102 (SDL_NAME(snd_pcm_hw_params_set_period_size_near)) (snd_pcm_t pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	103 snd_pcm_hw_params_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	104 * params,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	105 snd_pcm_uframes_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	106 val, int *dir);
1664 cd3db072ba8a more indent cleanup Sam Lantinga <slouken@libsdl.org> parents: 1663 diff changeset	107 static snd_pcm_sframes_t
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	108 (*SDL_NAME(snd_pcm_hw_params_get_period_size)) (const
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	109 snd_pcm_hw_params_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	110 * params);
1664 cd3db072ba8a more indent cleanup Sam Lantinga <slouken@libsdl.org> parents: 1663 diff changeset	111 static unsigned int
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	112 (SDL_NAME(snd_pcm_hw_params_set_periods_near)) (snd_pcm_t pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	113 snd_pcm_hw_params_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	114 * params,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	115 unsigned int val,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	116 int *dir);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	117 static int (SDL_NAME(snd_pcm_hw_params_get_periods)) (snd_pcm_hw_params_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	118 params);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	119 static int (SDL_NAME(snd_pcm_hw_params)) (snd_pcm_t pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	120 snd_pcm_hw_params_t * params);
1552 b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	121 /*
b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	122 */
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	123 static int (SDL_NAME(snd_pcm_sw_params_current)) (snd_pcm_t pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	124 snd_pcm_sw_params_t *
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	125 swparams);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	126 static int (SDL_NAME(snd_pcm_sw_params_set_start_threshold)) (snd_pcm_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	127 pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	128 snd_pcm_sw_params_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	129 * params,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	130 snd_pcm_uframes_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	131 val);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	132 static int (SDL_NAME(snd_pcm_sw_params_set_avail_min)) (snd_pcm_t pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	133 snd_pcm_sw_params_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	134 * params,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	135 snd_pcm_uframes_t
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	136 val);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	137 static int (SDL_NAME(snd_pcm_sw_params)) (snd_pcm_t pcm,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	138 snd_pcm_sw_params_t * params);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	139 static int (SDL_NAME(snd_pcm_nonblock)) (snd_pcm_t pcm, int nonblock);
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	140 #define snd_pcm_hw_params_sizeof SDL_NAME(snd_pcm_hw_params_sizeof)
1552 b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	141 #define snd_pcm_sw_params_sizeof SDL_NAME(snd_pcm_sw_params_sizeof)
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	142
1161 05d4b93b911e Placate gcc's strict aliasing rules with an extra cast. Ryan C. Gordon <icculus@icculus.org> parents: 942 diff changeset	143 /* cast funcs to char* first, to please GCC's strict aliasing rules. */
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	144 static struct
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	145 {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	146 const char *name;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	147 void **func;
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	148 } alsa_functions[] = {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	149 {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	150 "snd_pcm_open", (void *) (char ) &SDL_NAME(snd_pcm_open)}, {
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	151 "snd_pcm_close", (void *) (char ) &SDL_NAME(snd_pcm_close)}, {
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	152 "snd_pcm_writei", (void *) (char ) &SDL_NAME(snd_pcm_writei)}, {
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	153 "snd_pcm_resume", (void *) (char ) &SDL_NAME(snd_pcm_resume)}, {
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	154 "snd_pcm_prepare", (void *) (char ) &SDL_NAME(snd_pcm_prepare)}, {
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	155 "snd_pcm_drain", (void *) (char ) &SDL_NAME(snd_pcm_drain)}, {
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	156 "snd_strerror", (void *) (char ) &SDL_NAME(snd_strerror)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	157 "snd_pcm_hw_params_sizeof",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	158 (void *) (char ) &SDL_NAME(snd_pcm_hw_params_sizeof)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	159 "snd_pcm_sw_params_sizeof",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	160 (void *) (char ) &SDL_NAME(snd_pcm_sw_params_sizeof)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	161 "snd_pcm_hw_params_any",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	162 (void *) (char ) &SDL_NAME(snd_pcm_hw_params_any)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	163 "snd_pcm_hw_params_set_access",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	164 (void *) (char ) &SDL_NAME(snd_pcm_hw_params_set_access)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	165 "snd_pcm_hw_params_set_format",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	166 (void *) (char ) &SDL_NAME(snd_pcm_hw_params_set_format)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	167 "snd_pcm_hw_params_set_channels",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	168 (void *) (char ) &SDL_NAME(snd_pcm_hw_params_set_channels)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	169 "snd_pcm_hw_params_get_channels",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	170 (void *) (char ) &SDL_NAME(snd_pcm_hw_params_get_channels)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	171 "snd_pcm_hw_params_set_rate_near",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	172 (void *) (char ) &SDL_NAME(snd_pcm_hw_params_set_rate_near)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	173 "snd_pcm_hw_params_set_period_size_near", (void *) (char )
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	174 &SDL_NAME(snd_pcm_hw_params_set_period_size_near)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	175 "snd_pcm_hw_params_get_period_size",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	176 (void *) (char ) &SDL_NAME(snd_pcm_hw_params_get_period_size)},
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	177 {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	178 "snd_pcm_hw_params_set_periods_near", (void *) (char )
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	179 &SDL_NAME(snd_pcm_hw_params_set_periods_near)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	180 "snd_pcm_hw_params_get_periods",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	181 (void *) (char ) &SDL_NAME(snd_pcm_hw_params_get_periods)}, {
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	182 "snd_pcm_hw_params", (void *) (char ) &SDL_NAME(snd_pcm_hw_params)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	183 "snd_pcm_sw_params_current",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	184 (void *) (char ) &SDL_NAME(snd_pcm_sw_params_current)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	185 "snd_pcm_sw_params_set_start_threshold", (void *) (char )
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	186 &SDL_NAME(snd_pcm_sw_params_set_start_threshold)}, {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	187 "snd_pcm_sw_params_set_avail_min",
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	188 (void *) (char ) &SDL_NAME(snd_pcm_sw_params_set_avail_min)}, {
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	189 "snd_pcm_sw_params", (void *) (char ) &SDL_NAME(snd_pcm_sw_params)}, {
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	190 "snd_pcm_nonblock", (void *) (char ) &SDL_NAME(snd_pcm_nonblock)},};
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	191
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	192 static void
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	193 UnloadALSALibrary(void)
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	194 {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	195 if (alsa_loaded) {
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	196 /* SDL_UnloadObject(alsa_handle);*/
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	197 dlclose(alsa_handle);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	198 alsa_handle = NULL;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	199 alsa_loaded = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	200 }
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	201 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	202
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	203 static int
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	204 LoadALSALibrary(void)
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	205 {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	206 int i, retval = -1;
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	207
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	208 /* alsa_handle = SDL_LoadObject(alsa_library);*/
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	209 alsa_handle = dlopen(alsa_library, RTLD_NOW);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	210 if (alsa_handle) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	211 alsa_loaded = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	212 retval = 0;
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	213 for (i = 0; i < SDL_arraysize(alsa_functions); i++) {
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	214 /* alsa_functions[i].func = SDL_LoadFunction(alsa_handle,alsa_functions[i].name);/
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	215 #if HAVE_DLVSYM
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	216 *alsa_functions[i].func =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	217 dlvsym(alsa_handle, alsa_functions[i].name, "ALSA_0.9");
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	218 if (!*alsa_functions[i].func)
939 c7c04f811994 Date: Tue, 01 Jun 2004 15:27:44 +0300 Sam Lantinga <slouken@libsdl.org> parents: 865 diff changeset	219 #endif
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	220 *alsa_functions[i].func =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	221 dlsym(alsa_handle, alsa_functions[i].name);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	222 if (!*alsa_functions[i].func) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	223 retval = -1;
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	224 UnloadALSALibrary();
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	225 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	226 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	227 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	228 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	229 return retval;
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	230 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	231
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	232 #else
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	233
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	234 static void
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	235 UnloadALSALibrary(void)
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	236 {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	237 return;
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	238 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	239
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	240 static int
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	241 LoadALSALibrary(void)
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	242 {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	243 return 0;
865 92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	244 }
92615154bb68 Date: Sun, 29 Feb 2004 15:14:22 +0200 Sam Lantinga <slouken@libsdl.org> parents: 769 diff changeset	245
1361 19418e4422cb New configure-based build system. Still work in progress, but much improved Sam Lantinga <slouken@libsdl.org> parents: 1358 diff changeset	246 #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	247
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	248 static const char *
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	249 get_audio_device(int channels)
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	250 {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	251 const char *device;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	252
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	253 device = SDL_getenv("AUDIODEV"); /* Is there a standard variable name? */
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	254 if (device == NULL) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	255 if (channels == 6)
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	256 device = "surround51";
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	257 else if (channels == 4)
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	258 device = "surround40";
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	259 else
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	260 device = DEFAULT_DEVICE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	261 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	262 return device;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	263 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	264
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	265 /* Audio driver bootstrap functions */
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	266
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	267 static int
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	268 Audio_Available(void)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	269 {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	270 int available;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	271 int status;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	272 snd_pcm_t *handle;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	273
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	274 available = 0;
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	275 if (LoadALSALibrary() < 0) {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	276 return available;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	277 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	278 status =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	279 SDL_NAME(snd_pcm_open) (&handle, get_audio_device(2),
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	280 SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	281 if (status >= 0) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	282 available = 1;
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	283 SDL_NAME(snd_pcm_close) (handle);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	284 }
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	285 UnloadALSALibrary();
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	286 return (available);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	287 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	288
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	289 static void
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	290 Audio_DeleteDevice(SDL_AudioDevice * device)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	291 {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	292 SDL_free(device->hidden);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	293 SDL_free(device);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	294 UnloadALSALibrary();
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	295 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	296
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	297 static SDL_AudioDevice *
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	298 Audio_CreateDevice(int devindex)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	299 {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	300 SDL_AudioDevice *this;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	301
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	302 /* Initialize all variables that we clean on shutdown */
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	303 LoadALSALibrary();
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	304 this = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice));
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	305 if (this) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	306 SDL_memset(this, 0, (sizeof *this));
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	307 this->hidden = (struct SDL_PrivateAudioData *)
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	308 SDL_malloc((sizeof *this->hidden));
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	309 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	310 if ((this == NULL) \|\| (this->hidden == NULL)) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	311 SDL_OutOfMemory();
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	312 if (this) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	313 SDL_free(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	314 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	315 return (0);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	316 }
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	317 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	318
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	319 /* Set the function pointers */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	320 this->OpenAudio = ALSA_OpenAudio;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	321 this->WaitAudio = ALSA_WaitAudio;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	322 this->PlayAudio = ALSA_PlayAudio;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	323 this->GetAudioBuf = ALSA_GetAudioBuf;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	324 this->CloseAudio = ALSA_CloseAudio;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	325
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	326 this->free = Audio_DeleteDevice;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	327
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	328 return this;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	329 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	330
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	331 AudioBootStrap ALSA_bootstrap = {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	332 DRIVER_NAME, "ALSA 0.9 PCM audio",
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	333 Audio_Available, Audio_CreateDevice
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	334 };
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	335
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	336 /* This function waits until it is possible to write a full sound buffer */
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	337 static void
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	338 ALSA_WaitAudio(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	339 {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	340 /* Check to see if the thread-parent process is still alive */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	341 {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	342 static int cnt = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	343 /* Note that this only works with thread implementations
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	344 that use a different process id for each thread.
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	345 */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	346 if (parent && (((++cnt) % 10) == 0)) { /* Check every 10 loops */
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	347 if (kill(parent, 0) < 0) {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	348 this->enabled = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	349 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	350 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	351 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	352 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	353
1702 a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	354
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	355 /*
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	356 * http://bugzilla.libsdl.org/show_bug.cgi?id=110
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	357 * "For Linux ALSA, this is FL-FR-RL-RR-C-LFE
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	358 * and for Windows DirectX [and CoreAudio], this is FL-FR-C-LFE-RL-RR"
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	359 */
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	360 #define SWIZ6(T) \
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	361 T ptr = (T ) mixbuf; \
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	362 const Uint32 count = (this->spec.samples / 6); \
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	363 Uint32 i; \
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	364 for (i = 0; i < count; i++, ptr += 6) { \
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	365 T tmp; \
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	366 tmp = ptr[2]; ptr[2] = ptr[4]; ptr[4] = tmp; \
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	367 tmp = ptr[3]; ptr[3] = ptr[5]; ptr[5] = tmp; \
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	368 }
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	369
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	370 static __inline__ void
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	371 swizzle_alsa_channels_6_64bit(_THIS)
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	372 {
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	373 SWIZ6(Uint64);
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	374 }
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	375 static __inline__ void
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	376 swizzle_alsa_channels_6_32bit(_THIS)
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	377 {
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	378 SWIZ6(Uint32);
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	379 }
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	380 static __inline__ void
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	381 swizzle_alsa_channels_6_16bit(_THIS)
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	382 {
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	383 SWIZ6(Uint16);
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	384 }
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	385 static __inline__ void
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	386 swizzle_alsa_channels_6_8bit(_THIS)
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	387 {
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	388 SWIZ6(Uint8);
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	389 }
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	390
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	391 #undef SWIZ6
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	392
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	393
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	394 /*
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	395 * Called right before feeding this->mixbuf to the hardware. Swizzle channels
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	396 * from Windows/Mac order to the format alsalib will want.
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	397 */
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	398 static __inline__ void
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	399 swizzle_alsa_channels(_THIS)
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	400 {
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	401 if (this->spec.channels == 6) {
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	402 const Uint16 fmtsize = (this->spec.format & 0xFF); /* bits/channel. */
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	403 if (fmtsize == 16)
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	404 swizzle_alsa_channels_6_16bit(this);
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	405 else if (fmtsize == 8)
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	406 swizzle_alsa_channels_6_8bit(this);
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	407 else if (fmtsize == 32)
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	408 swizzle_alsa_channels_6_32bit(this);
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	409 else if (fmtsize == 64)
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	410 swizzle_alsa_channels_6_64bit(this);
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	411 }
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	412
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	413 /* !!! FIXME: update this for 7.1 if needed, later. */
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	414 }
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	415
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	416
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	417 static void
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	418 ALSA_PlayAudio(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	419 {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	420 int status;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	421 int sample_len;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	422 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	423
1702 a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	424 swizzle_alsa_channels(this);
a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	425
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	426 sample_len = this->spec.samples;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	427 sample_buf = (signed short *) mixbuf;
1702 a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	428
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	429 while (sample_len > 0) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	430 status =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	431 SDL_NAME(snd_pcm_writei) (pcm_handle, sample_buf, sample_len);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	432 if (status < 0) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	433 if (status == -EAGAIN) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	434 SDL_Delay(1);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	435 continue;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	436 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	437 if (status == -ESTRPIPE) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	438 do {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	439 SDL_Delay(1);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	440 status = SDL_NAME(snd_pcm_resume) (pcm_handle);
1702 a7ad7081b977 Merged Ryan's 5.1 audio fix from SDL 1.2 Sam Lantinga <slouken@libsdl.org> parents: 1668 diff changeset	441 } while (status == -EAGAIN);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	442 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	443 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	444 status = SDL_NAME(snd_pcm_prepare) (pcm_handle);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	445 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	446 if (status < 0) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	447 /* Hmm, not much we can do - abort */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	448 this->enabled = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	449 return;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	450 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	451 continue;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	452 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	453 sample_buf += status * this->spec.channels;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	454 sample_len -= status;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	455 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	456 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	457
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	458 static Uint8 *
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	459 ALSA_GetAudioBuf(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	460 {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	461 return (mixbuf);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	462 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	463
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	464 static void
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	465 ALSA_CloseAudio(_THIS)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	466 {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	467 if (mixbuf != NULL) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	468 SDL_FreeAudioMem(mixbuf);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	469 mixbuf = NULL;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	470 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	471 if (pcm_handle) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	472 SDL_NAME(snd_pcm_drain) (pcm_handle);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	473 SDL_NAME(snd_pcm_close) (pcm_handle);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	474 pcm_handle = NULL;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	475 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	476 }
74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	477
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	478 static int
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	479 ALSA_OpenAudio(_THIS, SDL_AudioSpec * spec)
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	480 {
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	481 int status;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	482 snd_pcm_hw_params_t *hwparams;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	483 snd_pcm_sw_params_t *swparams;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	484 snd_pcm_format_t format;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	485 snd_pcm_uframes_t frames;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	486 Uint16 test_format;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	487
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	488 /* Open the audio device */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	489 /* Name of device should depend on # channels in spec */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	490 status =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	491 SDL_NAME(snd_pcm_open) (&pcm_handle,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	492 get_audio_device(spec->channels),
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	493 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	494
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	495 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	496 SDL_SetError("Couldn't open audio device: %s",
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	497 SDL_NAME(snd_strerror) (status));
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	498 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	499 }
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	500
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	501 /* Figure out what the hardware is capable of */
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	502 snd_pcm_hw_params_alloca(&hwparams);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	503 status = SDL_NAME(snd_pcm_hw_params_any) (pcm_handle, hwparams);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	504 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	505 SDL_SetError("Couldn't get hardware config: %s",
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	506 SDL_NAME(snd_strerror) (status));
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	507 ALSA_CloseAudio(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	508 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	509 }
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	510
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	511 /* SDL only uses interleaved sample output */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	512 status =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	513 SDL_NAME(snd_pcm_hw_params_set_access) (pcm_handle, hwparams,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	514 SND_PCM_ACCESS_RW_INTERLEAVED);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	515 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	516 SDL_SetError("Couldn't set interleaved access: %s",
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	517 SDL_NAME(snd_strerror) (status));
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	518 ALSA_CloseAudio(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	519 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	520 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	521
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	522 /* Try for a closest match on audio format */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	523 status = -1;
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	524 for (test_format = SDL_FirstAudioFormat(spec->format);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	525 test_format && (status < 0);) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	526 switch (test_format) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	527 case AUDIO_U8:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	528 format = SND_PCM_FORMAT_U8;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	529 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	530 case AUDIO_S8:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	531 format = SND_PCM_FORMAT_S8;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	532 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	533 case AUDIO_S16LSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	534 format = SND_PCM_FORMAT_S16_LE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	535 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	536 case AUDIO_S16MSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	537 format = SND_PCM_FORMAT_S16_BE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	538 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	539 case AUDIO_U16LSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	540 format = SND_PCM_FORMAT_U16_LE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	541 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	542 case AUDIO_U16MSB:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	543 format = SND_PCM_FORMAT_U16_BE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	544 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	545 default:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	546 format = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	547 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	548 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	549 if (format != 0) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	550 status =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	551 SDL_NAME(snd_pcm_hw_params_set_format) (pcm_handle,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	552 hwparams, format);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	553 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	554 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	555 test_format = SDL_NextAudioFormat();
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	556 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	557 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	558 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	559 SDL_SetError("Couldn't find any hardware audio formats");
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	560 ALSA_CloseAudio(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	561 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	562 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	563 spec->format = test_format;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	564
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	565 /* Set the number of channels */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	566 status =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	567 SDL_NAME(snd_pcm_hw_params_set_channels) (pcm_handle, hwparams,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	568 spec->channels);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	569 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	570 status = SDL_NAME(snd_pcm_hw_params_get_channels) (hwparams);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	571 if ((status <= 0) \|\| (status > 2)) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	572 SDL_SetError("Couldn't set audio channels");
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	573 ALSA_CloseAudio(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	574 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	575 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	576 spec->channels = status;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	577 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	578
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	579 /* Set the audio rate */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	580 status =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	581 SDL_NAME(snd_pcm_hw_params_set_rate_near) (pcm_handle, hwparams,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	582 spec->freq, NULL);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	583 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	584 SDL_SetError("Couldn't set audio frequency: %s",
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	585 SDL_NAME(snd_strerror) (status));
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	586 ALSA_CloseAudio(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	587 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	588 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	589 spec->freq = status;
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	590
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	591 /* Set the buffer size, in samples */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	592 frames = spec->samples;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	593 frames =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	594 SDL_NAME(snd_pcm_hw_params_set_period_size_near) (pcm_handle,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	595 hwparams, frames,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	596 NULL);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	597 spec->samples = frames;
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	598 SDL_NAME(snd_pcm_hw_params_set_periods_near) (pcm_handle, hwparams, 2,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	599 NULL);
354 30935e76acb5 Updated ALSA audio support for ALSA 0.9 Sam Lantinga <slouken@libsdl.org> parents: 297 diff changeset	600
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	601 /* "set" the hardware with the desired parameters */
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	602 status = SDL_NAME(snd_pcm_hw_params) (pcm_handle, hwparams);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	603 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	604 SDL_SetError("Couldn't set hardware audio parameters: %s",
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	605 SDL_NAME(snd_strerror) (status));
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	606 ALSA_CloseAudio(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	607 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	608 }
1552 b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	609
1553 63fa37538842 Left the debug code more explicit Sam Lantinga <slouken@libsdl.org> parents: 1552 diff changeset	610 /* This is useful for debugging... */
1552 b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	611 /*
1553 63fa37538842 Left the debug code more explicit Sam Lantinga <slouken@libsdl.org> parents: 1552 diff changeset	612 { snd_pcm_sframes_t bufsize; int fragments;
1552 b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	613 bufsize = SDL_NAME(snd_pcm_hw_params_get_period_size)(hwparams);
b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	614 fragments = SDL_NAME(snd_pcm_hw_params_get_periods)(hwparams);
b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	615
b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	616 fprintf(stderr, "ALSA: bufsize = %ld, fragments = %d\n", bufsize, fragments);
b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	617 }
b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	618 */
b2462b772cce Fixed bug #79 Sam Lantinga <slouken@libsdl.org> parents: 1402 diff changeset	619
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	620 /* Set the software parameters */
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	621 snd_pcm_sw_params_alloca(&swparams);
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	622 status = SDL_NAME(snd_pcm_sw_params_current) (pcm_handle, swparams);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	623 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	624 SDL_SetError("Couldn't get software config: %s",
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	625 SDL_NAME(snd_strerror) (status));
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	626 ALSA_CloseAudio(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	627 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	628 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	629 status =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	630 SDL_NAME(snd_pcm_sw_params_set_start_threshold) (pcm_handle,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	631 swparams, 0);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	632 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	633 SDL_SetError("Couldn't set start threshold: %s",
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	634 SDL_NAME(snd_strerror) (status));
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	635 ALSA_CloseAudio(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	636 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	637 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	638 status =
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	639 SDL_NAME(snd_pcm_sw_params_set_avail_min) (pcm_handle, swparams,
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	640 frames);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	641 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	642 SDL_SetError("Couldn't set avail min: %s",
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	643 SDL_NAME(snd_strerror) (status));
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	644 ALSA_CloseAudio(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	645 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	646 }
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	647 status = SDL_NAME(snd_pcm_sw_params) (pcm_handle, swparams);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	648 if (status < 0) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	649 SDL_SetError("Couldn't set software audio parameters: %s",
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	650 SDL_NAME(snd_strerror) (status));
4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	651 ALSA_CloseAudio(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	652 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	653 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	654
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	655 /* Calculate the final parameters for this audio specification */
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	656 SDL_CalculateAudioSpec(spec);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	657
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	658 /* Allocate mixing buffer */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	659 mixlen = spec->size;
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	660 mixbuf = (Uint8 *) SDL_AllocAudioMem(mixlen);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	661 if (mixbuf == NULL) {
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	662 ALSA_CloseAudio(this);
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	663 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	664 }
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	665 SDL_memset(mixbuf, spec->silence, spec->size);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	666
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	667 /* Get the parent process id (we're the parent of the audio thread) */
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	668 parent = getpid();
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	669
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	670 /* Switch to blocking mode for playback */
1668 4da1ee79c9af more tweaking indent options Sam Lantinga <slouken@libsdl.org> parents: 1664 diff changeset	671 SDL_NAME(snd_pcm_nonblock) (pcm_handle, 0);
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	672
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	673 /* We're ready to rock and roll. :-) */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	674 return (0);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	675 }
0 74212992fb08 Initial revision Sam Lantinga <slouken@lokigames.com> parents: diff changeset	676
1662 782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. Sam Lantinga <slouken@libsdl.org> parents: 1553 diff changeset	677 /* vi: set ts=4 sw=4 expandtab: */

Mercurial > sdl-ios-xcode

annotate src/audio/alsa/SDL_alsa_audio.c @ 1702:a7ad7081b977 SDL-1.3