annotate src/audio/alsa/SDL_alsa_audio.c @ 5284:96a22141cf86 tip

Changed output directory of Universal libSDL.a for iOS to respect build configurations. Template generator was updated to reflect these changes as well.
author Eric Wing <ewing . public |-at-| gmail . com>
date Sat, 12 Feb 2011 21:52:30 -0800
parents b530ef003506
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2011 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* Allow access to a raw mixing buffer */
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25
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26 #include <sys/types.h>
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27 #include <signal.h> /* For kill() */
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28 #include <errno.h>
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29 #include <string.h>
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30
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31 #include "SDL_timer.h"
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32 #include "SDL_audio.h"
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33 #include "../SDL_audiomem.h"
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34 #include "../SDL_audio_c.h"
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35 #include "SDL_alsa_audio.h"
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36
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37 #ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
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38 #include "SDL_loadso.h"
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39 #endif
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40
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41 /* The tag name used by ALSA audio */
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42 #define DRIVER_NAME "alsa"
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43
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44 static int (*ALSA_snd_pcm_open)
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45 (snd_pcm_t **, const char *, snd_pcm_stream_t, int);
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46 static int (*ALSA_snd_pcm_close) (snd_pcm_t * pcm);
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47 static snd_pcm_sframes_t(*ALSA_snd_pcm_writei)
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48 (snd_pcm_t *, const void *, snd_pcm_uframes_t);
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49 static int (*ALSA_snd_pcm_recover) (snd_pcm_t *, int, int);
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50 static int (*ALSA_snd_pcm_prepare) (snd_pcm_t *);
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51 static int (*ALSA_snd_pcm_drain) (snd_pcm_t *);
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52 static const char *(*ALSA_snd_strerror) (int);
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53 static size_t(*ALSA_snd_pcm_hw_params_sizeof) (void);
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54 static size_t(*ALSA_snd_pcm_sw_params_sizeof) (void);
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55 static void (*ALSA_snd_pcm_hw_params_copy)
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56 (snd_pcm_hw_params_t *, const snd_pcm_hw_params_t *);
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57 static int (*ALSA_snd_pcm_hw_params_any) (snd_pcm_t *, snd_pcm_hw_params_t *);
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58 static int (*ALSA_snd_pcm_hw_params_set_access)
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59 (snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_access_t);
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60 static int (*ALSA_snd_pcm_hw_params_set_format)
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61 (snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_format_t);
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62 static int (*ALSA_snd_pcm_hw_params_set_channels)
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63 (snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int);
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64 static int (*ALSA_snd_pcm_hw_params_get_channels)
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65 (const snd_pcm_hw_params_t *, unsigned int *);
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66 static int (*ALSA_snd_pcm_hw_params_set_rate_near)
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67 (snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int *, int *);
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68 static int (*ALSA_snd_pcm_hw_params_set_period_size_near)
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69 (snd_pcm_t *, snd_pcm_hw_params_t *, snd_pcm_uframes_t *, int *);
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70 static int (*ALSA_snd_pcm_hw_params_get_period_size)
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71 (const snd_pcm_hw_params_t *, snd_pcm_uframes_t *, int *);
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72 static int (*ALSA_snd_pcm_hw_params_set_periods_near)
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73 (snd_pcm_t *, snd_pcm_hw_params_t *, unsigned int *, int *);
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74 static int (*ALSA_snd_pcm_hw_params_get_periods)
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75 (const snd_pcm_hw_params_t *, unsigned int *, int *);
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76 static int (*ALSA_snd_pcm_hw_params_set_buffer_size_near)
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77 (snd_pcm_t *pcm, snd_pcm_hw_params_t *, snd_pcm_uframes_t *);
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78 static int (*ALSA_snd_pcm_hw_params_get_buffer_size)
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79 (const snd_pcm_hw_params_t *, snd_pcm_uframes_t *);
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80 static int (*ALSA_snd_pcm_hw_params) (snd_pcm_t *, snd_pcm_hw_params_t *);
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81 static int (*ALSA_snd_pcm_sw_params_current) (snd_pcm_t *,
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82 snd_pcm_sw_params_t *);
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83 static int (*ALSA_snd_pcm_sw_params_set_start_threshold)
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84 (snd_pcm_t *, snd_pcm_sw_params_t *, snd_pcm_uframes_t);
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85 static int (*ALSA_snd_pcm_sw_params) (snd_pcm_t *, snd_pcm_sw_params_t *);
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86 static int (*ALSA_snd_pcm_nonblock) (snd_pcm_t *, int);
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87 static int (*ALSA_snd_pcm_wait)(snd_pcm_t *, int);
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88 #define snd_pcm_hw_params_sizeof ALSA_snd_pcm_hw_params_sizeof
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89 #define snd_pcm_sw_params_sizeof ALSA_snd_pcm_sw_params_sizeof
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90
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91
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92 #ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
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93
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94 static const char *alsa_library = SDL_AUDIO_DRIVER_ALSA_DYNAMIC;
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95 static void *alsa_handle = NULL;
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96
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97 static int
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98 load_alsa_sym(const char *fn, void **addr)
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99 {
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100 *addr = SDL_LoadFunction(alsa_handle, fn);
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101 if (*addr == NULL) {
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102 /* Don't call SDL_SetError(): SDL_LoadFunction already did. */
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103 return 0;
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104 }
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105
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106 return 1;
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107 }
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108
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109 /* cast funcs to char* first, to please GCC's strict aliasing rules. */
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110 #define SDL_ALSA_SYM(x) \
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111 if (!load_alsa_sym(#x, (void **) (char *) &ALSA_##x)) return -1
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112 #else
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113 #define SDL_ALSA_SYM(x) ALSA_##x = x
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114 #endif
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115
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116 static int
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117 load_alsa_syms(void)
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118 {
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119 SDL_ALSA_SYM(snd_pcm_open);
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120 SDL_ALSA_SYM(snd_pcm_close);
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121 SDL_ALSA_SYM(snd_pcm_writei);
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122 SDL_ALSA_SYM(snd_pcm_recover);
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123 SDL_ALSA_SYM(snd_pcm_prepare);
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124 SDL_ALSA_SYM(snd_pcm_drain);
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125 SDL_ALSA_SYM(snd_strerror);
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126 SDL_ALSA_SYM(snd_pcm_hw_params_sizeof);
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127 SDL_ALSA_SYM(snd_pcm_sw_params_sizeof);
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128 SDL_ALSA_SYM(snd_pcm_hw_params_copy);
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129 SDL_ALSA_SYM(snd_pcm_hw_params_any);
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130 SDL_ALSA_SYM(snd_pcm_hw_params_set_access);
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131 SDL_ALSA_SYM(snd_pcm_hw_params_set_format);
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132 SDL_ALSA_SYM(snd_pcm_hw_params_set_channels);
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133 SDL_ALSA_SYM(snd_pcm_hw_params_get_channels);
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134 SDL_ALSA_SYM(snd_pcm_hw_params_set_rate_near);
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135 SDL_ALSA_SYM(snd_pcm_hw_params_set_period_size_near);
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136 SDL_ALSA_SYM(snd_pcm_hw_params_get_period_size);
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137 SDL_ALSA_SYM(snd_pcm_hw_params_set_periods_near);
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138 SDL_ALSA_SYM(snd_pcm_hw_params_get_periods);
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139 SDL_ALSA_SYM(snd_pcm_hw_params_set_buffer_size_near);
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140 SDL_ALSA_SYM(snd_pcm_hw_params_get_buffer_size);
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141 SDL_ALSA_SYM(snd_pcm_hw_params);
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142 SDL_ALSA_SYM(snd_pcm_sw_params_current);
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143 SDL_ALSA_SYM(snd_pcm_sw_params_set_start_threshold);
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144 SDL_ALSA_SYM(snd_pcm_sw_params);
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145 SDL_ALSA_SYM(snd_pcm_nonblock);
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146 SDL_ALSA_SYM(snd_pcm_wait);
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147 return 0;
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148 }
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149
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150 #undef SDL_ALSA_SYM
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151
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152 #ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
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153
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154 static void
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155 UnloadALSALibrary(void)
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156 {
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157 if (alsa_handle != NULL) {
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158 SDL_UnloadObject(alsa_handle);
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159 alsa_handle = NULL;
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160 }
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161 }
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162
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163 static int
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164 LoadALSALibrary(void)
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165 {
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166 int retval = 0;
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167 if (alsa_handle == NULL) {
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168 alsa_handle = SDL_LoadObject(alsa_library);
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169 if (alsa_handle == NULL) {
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170 retval = -1;
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171 /* Don't call SDL_SetError(): SDL_LoadObject already did. */
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172 } else {
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173 retval = load_alsa_syms();
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174 if (retval < 0) {
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175 UnloadALSALibrary();
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176 }
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177 }
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178 }
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179 return retval;
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180 }
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181
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182 #else
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183
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184 static void
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185 UnloadALSALibrary(void)
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186 {
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187 }
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188
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189 static int
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190 LoadALSALibrary(void)
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191 {
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192 load_alsa_syms();
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193 return 0;
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194 }
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195
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196 #endif /* SDL_AUDIO_DRIVER_ALSA_DYNAMIC */
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197
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198 static const char *
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199 get_audio_device(int channels)
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200 {
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201 const char *device;
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202
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203 device = SDL_getenv("AUDIODEV"); /* Is there a standard variable name? */
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204 if (device == NULL) {
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205 switch (channels) {
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206 case 6:
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207 device = "plug:surround51";
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208 break;
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209 case 4:
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210 device = "plug:surround40";
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211 break;
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212 default:
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213 device = "default";
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214 break;
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215 }
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216 }
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217 return device;
0
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218 }
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219
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220
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221 /* This function waits until it is possible to write a full sound buffer */
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222 static void
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223 ALSA_WaitDevice(_THIS)
0
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224 {
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225 /* We're in blocking mode, so there's nothing to do here */
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226 }
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227
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228
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229 /* !!! FIXME: is there a channel swizzler in alsalib instead? */
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230 /*
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231 * http://bugzilla.libsdl.org/show_bug.cgi?id=110
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232 * "For Linux ALSA, this is FL-FR-RL-RR-C-LFE
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233 * and for Windows DirectX [and CoreAudio], this is FL-FR-C-LFE-RL-RR"
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234 */
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235 #define SWIZ6(T) \
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236 T *ptr = (T *) this->hidden->mixbuf; \
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237 Uint32 i; \
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238 for (i = 0; i < this->spec.samples; i++, ptr += 6) { \
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239 T tmp; \
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240 tmp = ptr[2]; ptr[2] = ptr[4]; ptr[4] = tmp; \
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241 tmp = ptr[3]; ptr[3] = ptr[5]; ptr[5] = tmp; \
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242 }
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243
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244 static __inline__ void
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245 swizzle_alsa_channels_6_64bit(_THIS)
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246 {
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247 SWIZ6(Uint64);
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248 }
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249
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250 static __inline__ void
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251 swizzle_alsa_channels_6_32bit(_THIS)
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252 {
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253 SWIZ6(Uint32);
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254 }
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255
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256 static __inline__ void
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257 swizzle_alsa_channels_6_16bit(_THIS)
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258 {
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259 SWIZ6(Uint16);
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260 }
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261
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262 static __inline__ void
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263 swizzle_alsa_channels_6_8bit(_THIS)
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264 {
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265 SWIZ6(Uint8);
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266 }
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267
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268 #undef SWIZ6
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269
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270
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271 /*
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272 * Called right before feeding this->hidden->mixbuf to the hardware. Swizzle
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273 * channels from Windows/Mac order to the format alsalib will want.
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274 */
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275 static __inline__ void
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276 swizzle_alsa_channels(_THIS)
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277 {
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278 if (this->spec.channels == 6) {
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279 const Uint16 fmtsize = (this->spec.format & 0xFF); /* bits/channel. */
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280 if (fmtsize == 16)
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281 swizzle_alsa_channels_6_16bit(this);
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282 else if (fmtsize == 8)
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283 swizzle_alsa_channels_6_8bit(this);
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284 else if (fmtsize == 32)
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285 swizzle_alsa_channels_6_32bit(this);
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286 else if (fmtsize == 64)
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287 swizzle_alsa_channels_6_64bit(this);
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288 }
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289
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290 /* !!! FIXME: update this for 7.1 if needed, later. */
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291 }
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292
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293
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294 static void
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295 ALSA_PlayDevice(_THIS)
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296 {
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297 int status;
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298 const Uint8 *sample_buf = (const Uint8 *) this->hidden->mixbuf;
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299 const int frame_size = (((int) (this->spec.format & 0xFF)) / 8) *
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300 this->spec.channels;
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301 snd_pcm_uframes_t frames_left = ((snd_pcm_uframes_t) this->spec.samples);
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302
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303 swizzle_alsa_channels(this);
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304
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305 while ( frames_left > 0 && this->enabled ) {
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306 /* !!! FIXME: This works, but needs more testing before going live */
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307 /*ALSA_snd_pcm_wait(this->hidden->pcm_handle, -1);*/
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308 status = ALSA_snd_pcm_writei(this->hidden->pcm_handle,
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309 sample_buf, frames_left);
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310
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311 if (status < 0) {
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312 if (status == -EAGAIN) {
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313 /* Apparently snd_pcm_recover() doesn't handle this case -
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314 does it assume snd_pcm_wait() above? */
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315 SDL_Delay(1);
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316 continue;
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317 }
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318 status = ALSA_snd_pcm_recover(this->hidden->pcm_handle, status, 0);
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319 if (status < 0) {
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320 /* Hmm, not much we can do - abort */
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321 fprintf(stderr, "ALSA write failed (unrecoverable): %s\n",
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322 ALSA_snd_strerror(status));
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323 this->enabled = 0;
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324 return;
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325 }
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326 continue;
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327 }
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328 sample_buf += status * frame_size;
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329 frames_left -= status;
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330 }
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331 }
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332
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333 static Uint8 *
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334 ALSA_GetDeviceBuf(_THIS)
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335 {
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336 return (this->hidden->mixbuf);
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337 }
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338
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339 static void
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340 ALSA_CloseDevice(_THIS)
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341 {
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342 if (this->hidden != NULL) {
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343 if (this->hidden->mixbuf != NULL) {
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344 SDL_FreeAudioMem(this->hidden->mixbuf);
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345 this->hidden->mixbuf = NULL;
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346 }
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347 if (this->hidden->pcm_handle) {
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348 ALSA_snd_pcm_drain(this->hidden->pcm_handle);
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349 ALSA_snd_pcm_close(this->hidden->pcm_handle);
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350 this->hidden->pcm_handle = NULL;
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351 }
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352 SDL_free(this->hidden);
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353 this->hidden = NULL;
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354 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
355 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
356
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
357 static int
3627
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
358 ALSA_finalize_hardware(_THIS, snd_pcm_hw_params_t *hwparams, int override)
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
359 {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
360 int status;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
361 snd_pcm_uframes_t bufsize;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
362
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
363 /* "set" the hardware with the desired parameters */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
364 status = ALSA_snd_pcm_hw_params(this->hidden->pcm_handle, hwparams);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
365 if ( status < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
366 return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
367 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
368
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
369 /* Get samples for the actual buffer size */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
370 status = ALSA_snd_pcm_hw_params_get_buffer_size(hwparams, &bufsize);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
371 if ( status < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
372 return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
373 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
374 if ( !override && bufsize != this->spec.samples * 2 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
375 return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
376 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
377
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
378 /* !!! FIXME: Is this safe to do? */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
379 this->spec.samples = bufsize / 2;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
380
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
381 /* This is useful for debugging */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
382 if ( SDL_getenv("SDL_AUDIO_ALSA_DEBUG") ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
383 snd_pcm_uframes_t persize = 0;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
384 unsigned int periods = 0;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
385
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
386 ALSA_snd_pcm_hw_params_get_period_size(hwparams, &persize, NULL);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
387 ALSA_snd_pcm_hw_params_get_periods(hwparams, &periods, NULL);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
388
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
389 fprintf(stderr,
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
390 "ALSA: period size = %ld, periods = %u, buffer size = %lu\n",
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
391 persize, periods, bufsize);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
392 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
393
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
394 return(0);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
395 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
396
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
397 static int
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
398 ALSA_set_period_size(_THIS, snd_pcm_hw_params_t *params, int override)
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
399 {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
400 const char *env;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
401 int status;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
402 snd_pcm_hw_params_t *hwparams;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
403 snd_pcm_uframes_t frames;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
404 unsigned int periods;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
405
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
406 /* Copy the hardware parameters for this setup */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
407 snd_pcm_hw_params_alloca(&hwparams);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
408 ALSA_snd_pcm_hw_params_copy(hwparams, params);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
409
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
410 if ( !override ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
411 env = SDL_getenv("SDL_AUDIO_ALSA_SET_PERIOD_SIZE");
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
412 if ( env ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
413 override = SDL_atoi(env);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
414 if ( override == 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
415 return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
416 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
417 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
418 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
419
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
420 frames = this->spec.samples;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
421 status = ALSA_snd_pcm_hw_params_set_period_size_near(
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
422 this->hidden->pcm_handle, hwparams, &frames, NULL);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
423 if ( status < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
424 return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
425 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
426
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
427 periods = 2;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
428 status = ALSA_snd_pcm_hw_params_set_periods_near(
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
429 this->hidden->pcm_handle, hwparams, &periods, NULL);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
430 if ( status < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
431 return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
432 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
433
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
434 return ALSA_finalize_hardware(this, hwparams, override);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
435 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
436
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
437 static int
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
438 ALSA_set_buffer_size(_THIS, snd_pcm_hw_params_t *params, int override)
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
439 {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
440 const char *env;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
441 int status;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
442 snd_pcm_hw_params_t *hwparams;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
443 snd_pcm_uframes_t frames;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
444
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
445 /* Copy the hardware parameters for this setup */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
446 snd_pcm_hw_params_alloca(&hwparams);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
447 ALSA_snd_pcm_hw_params_copy(hwparams, params);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
448
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
449 if ( !override ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
450 env = SDL_getenv("SDL_AUDIO_ALSA_SET_BUFFER_SIZE");
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
451 if ( env ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
452 override = SDL_atoi(env);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
453 if ( override == 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
454 return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
455 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
456 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
457 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
458
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
459 frames = this->spec.samples * 2;
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
460 status = ALSA_snd_pcm_hw_params_set_buffer_size_near(
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
461 this->hidden->pcm_handle, hwparams, &frames);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
462 if ( status < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
463 return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
464 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
465
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
466 return ALSA_finalize_hardware(this, hwparams, override);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
467 }
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
468
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
469 static int
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
470 ALSA_OpenDevice(_THIS, const char *devname, int iscapture)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
471 {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
472 int status = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
473 snd_pcm_t *pcm_handle = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
474 snd_pcm_hw_params_t *hwparams = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
475 snd_pcm_sw_params_t *swparams = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
476 snd_pcm_format_t format = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
477 SDL_AudioFormat test_format = 0;
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
478 unsigned int rate = 0;
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
479 unsigned int channels = 0;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
480
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
481 /* Initialize all variables that we clean on shutdown */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
482 this->hidden = (struct SDL_PrivateAudioData *)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
483 SDL_malloc((sizeof *this->hidden));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
484 if (this->hidden == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
485 SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
486 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
487 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
488 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
489
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
490 /* Open the audio device */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
491 /* Name of device should depend on # channels in spec */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
492 status = ALSA_snd_pcm_open(&pcm_handle,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
493 get_audio_device(this->spec.channels),
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
494 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
495
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
496 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
497 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
498 SDL_SetError("ALSA: Couldn't open audio device: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
499 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
500 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
501 }
354
30935e76acb5 Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
502
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
503 this->hidden->pcm_handle = pcm_handle;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
504
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
505 /* Figure out what the hardware is capable of */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
506 snd_pcm_hw_params_alloca(&hwparams);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
507 status = ALSA_snd_pcm_hw_params_any(pcm_handle, hwparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
508 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
509 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
510 SDL_SetError("ALSA: Couldn't get hardware config: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
511 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
512 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
513 }
354
30935e76acb5 Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
514
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
515 /* SDL only uses interleaved sample output */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
516 status = ALSA_snd_pcm_hw_params_set_access(pcm_handle, hwparams,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
517 SND_PCM_ACCESS_RW_INTERLEAVED);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
518 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
519 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
520 SDL_SetError("ALSA: Couldn't set interleaved access: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
521 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
522 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
523 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
524
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
525 /* Try for a closest match on audio format */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
526 status = -1;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
527 for (test_format = SDL_FirstAudioFormat(this->spec.format);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
528 test_format && (status < 0);) {
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
529 status = 0; /* if we can't support a format, it'll become -1. */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
530 switch (test_format) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
531 case AUDIO_U8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
532 format = SND_PCM_FORMAT_U8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
533 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
534 case AUDIO_S8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
535 format = SND_PCM_FORMAT_S8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
536 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
537 case AUDIO_S16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
538 format = SND_PCM_FORMAT_S16_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
539 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
540 case AUDIO_S16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
541 format = SND_PCM_FORMAT_S16_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
542 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
543 case AUDIO_U16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
544 format = SND_PCM_FORMAT_U16_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
545 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
546 case AUDIO_U16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
547 format = SND_PCM_FORMAT_U16_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
548 break;
1995
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
549 case AUDIO_S32LSB:
2010
39897da56f63 Whoops, wrong tokens for int32 support in ALSA driver (specified unsigned
Ryan C. Gordon <icculus@icculus.org>
parents: 2009
diff changeset
550 format = SND_PCM_FORMAT_S32_LE;
1995
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
551 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
552 case AUDIO_S32MSB:
2010
39897da56f63 Whoops, wrong tokens for int32 support in ALSA driver (specified unsigned
Ryan C. Gordon <icculus@icculus.org>
parents: 2009
diff changeset
553 format = SND_PCM_FORMAT_S32_BE;
1995
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
554 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
555 case AUDIO_F32LSB:
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
556 format = SND_PCM_FORMAT_FLOAT_LE;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
557 break;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
558 case AUDIO_F32MSB:
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
559 format = SND_PCM_FORMAT_FLOAT_BE;
0ca6ba107642 ALSA backend can handle int32 and float32 data directly.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
560 break;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
561 default:
2009
f2058fb367e4 ALSA was testing if (format) was set to zero as an error condition, but
Ryan C. Gordon <icculus@icculus.org>
parents: 1995
diff changeset
562 status = -1;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
563 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
564 }
2009
f2058fb367e4 ALSA was testing if (format) was set to zero as an error condition, but
Ryan C. Gordon <icculus@icculus.org>
parents: 1995
diff changeset
565 if (status >= 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
566 status = ALSA_snd_pcm_hw_params_set_format(pcm_handle,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
567 hwparams, format);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
568 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
569 if (status < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
570 test_format = SDL_NextAudioFormat();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
571 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
572 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
573 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
574 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
575 SDL_SetError("ALSA: Couldn't find any hardware audio formats");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
576 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
577 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
578 this->spec.format = test_format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
579
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
580 /* Set the number of channels */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
581 status = ALSA_snd_pcm_hw_params_set_channels(pcm_handle, hwparams,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
582 this->spec.channels);
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
583 channels = this->spec.channels;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
584 if (status < 0) {
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
585 status = ALSA_snd_pcm_hw_params_get_channels(hwparams, &channels);
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
586 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
587 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
588 SDL_SetError("ALSA: Couldn't set audio channels");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
589 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
590 }
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
591 this->spec.channels = channels;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
592 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
593
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
594 /* Set the audio rate */
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
595 rate = this->spec.freq;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
596 status = ALSA_snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams,
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
597 &rate, NULL);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
598 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
599 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
600 SDL_SetError("ALSA: Couldn't set audio frequency: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
601 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
602 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
603 }
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
604 this->spec.freq = rate;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
605
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
606 /* Set the buffer size, in samples */
3627
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
607 if ( ALSA_set_period_size(this, hwparams, 0) < 0 &&
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
608 ALSA_set_buffer_size(this, hwparams, 0) < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
609 /* Failed to set desired buffer size, do the best you can... */
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
610 if ( ALSA_set_period_size(this, hwparams, 1) < 0 ) {
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
611 ALSA_CloseDevice(this);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
612 SDL_SetError("Couldn't set hardware audio parameters: %s", ALSA_snd_strerror(status));
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
613 return(-1);
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
614 }
3362
4e83cdb58134 Merged r4990:4991 from branches/SDL-1.2: ALSA 1.0 API and dlvsym() removal.
Ryan C. Gordon <icculus@icculus.org>
parents: 3068
diff changeset
615 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
616 /* Set the software parameters */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
617 snd_pcm_sw_params_alloca(&swparams);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
618 status = ALSA_snd_pcm_sw_params_current(pcm_handle, swparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
619 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
620 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
621 SDL_SetError("ALSA: Couldn't get software config: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
622 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
623 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
624 }
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
625 status =
3627
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
626 ALSA_snd_pcm_sw_params_set_start_threshold(pcm_handle, swparams, 1);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
627 if (status < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
628 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
629 SDL_SetError("ALSA: Couldn't set start threshold: %s",
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
630 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
631 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
632 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
633 status = ALSA_snd_pcm_sw_params(pcm_handle, swparams);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
634 if (status < 0) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
635 ALSA_CloseDevice(this);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
636 SDL_SetError("Couldn't set software audio parameters: %s",
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
637 ALSA_snd_strerror(status));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
638 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
639 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
640
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
641 /* Calculate the final parameters for this audio specification */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
642 SDL_CalculateAudioSpec(&this->spec);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
643
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
644 /* Allocate mixing buffer */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
645 this->hidden->mixlen = this->spec.size;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
646 this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
647 if (this->hidden->mixbuf == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
648 ALSA_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
649 SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
650 return 0;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
651 }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
652 SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
653
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
654 /* Switch to blocking mode for playback */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
655 ALSA_snd_pcm_nonblock(pcm_handle, 0);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
656
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
657 /* We're ready to rock and roll. :-) */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
658 return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
659 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
660
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
661 static void
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
662 ALSA_Deinitialize(void)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
663 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
664 UnloadALSALibrary();
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
665 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
666
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
667 static int
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
668 ALSA_Init(SDL_AudioDriverImpl * impl)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
669 {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
670 if (LoadALSALibrary() < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
671 return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
672 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
673
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
674 /* Set the function pointers */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
675 impl->OpenDevice = ALSA_OpenDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
676 impl->WaitDevice = ALSA_WaitDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
677 impl->GetDeviceBuf = ALSA_GetDeviceBuf;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
678 impl->PlayDevice = ALSA_PlayDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
679 impl->CloseDevice = ALSA_CloseDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
680 impl->Deinitialize = ALSA_Deinitialize;
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
681 impl->OnlyHasDefaultOutputDevice = 1; /* !!! FIXME: Add device enum! */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
682
3699
4160ba33b597 Removed test for "driver is valid, but doesn't see any audio devices."
Ryan C. Gordon <icculus@icculus.org>
parents: 3697
diff changeset
683 return 1; /* this audio target is available. */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
684 }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
685
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
686
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
687 AudioBootStrap ALSA_bootstrap = {
3627
631173ffd68f Merged r4991:5154 from branches/SDL-1.2/src/audio/alsa: many 1.2.14 ALSA fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3362
diff changeset
688 DRIVER_NAME, "ALSA PCM audio", ALSA_Init, 0
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
689 };
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
690
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1878
diff changeset
691 /* vi: set ts=4 sw=4 expandtab: */