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annotate src/audio/pulse/SDL_pulseaudio.c @ 4135:cd98d1dc385c SDL-1.2

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Damien Carbery fixed bug #542 In SDL 1.2.13 sdl.m4 the AM_PATH_SDL function looks for sdl-config. It sets the PATH: PATH="$prefix/bin:$prefix/usr/bin:$PATH" but does not save the current PATH or restore the current PATH at the end. This breaks the build on Solaris because we have GNU tools in another dir (listed at the top of PATH) but non-GNU tools with the same names in $prefix/bin. Later configure tests finds the non-GNU tools and quits in error
author Sam Lantinga <slouken@libsdl.org>
date Thu, 24 Jan 2008 15:50:20 +0000
parents 42e83d81224b
children a1b03ba2fcd0
rev   line source
3939
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2007 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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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,
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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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
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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16 License along with this library; if not, write to the Free Software
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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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 Stéphan Kochen
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20 stephan@kochen.nl
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21
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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22 Based on parts of the ALSA and ESounD output drivers.
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23 */
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24 #include "SDL_config.h"
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25
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26 /* Allow access to an PulseAudio network stream mixing buffer */
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27
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28 #include <sys/types.h>
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29 #include <unistd.h>
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30 #include <signal.h>
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31 #include <errno.h>
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32 #include <pulse/simple.h>
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33
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34 #include "SDL_timer.h"
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35 #include "SDL_audio.h"
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36 #include "../SDL_audiomem.h"
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37 #include "../SDL_audio_c.h"
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38 #include "../SDL_audiodev_c.h"
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39 #include "SDL_pulseaudio.h"
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40
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41 #ifdef SDL_AUDIO_DRIVER_PULSE_DYNAMIC
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42 #include "SDL_name.h"
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43 #include "SDL_loadso.h"
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44 #else
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45 #define SDL_NAME(X) X
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46 #endif
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47
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48 /* The tag name used by the driver */
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49 #define PULSE_DRIVER_NAME "pulse"
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50
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51 /* Audio driver functions */
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52 static int PULSE_OpenAudio(_THIS, SDL_AudioSpec *spec);
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53 static void PULSE_WaitAudio(_THIS);
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54 static void PULSE_PlayAudio(_THIS);
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55 static Uint8 *PULSE_GetAudioBuf(_THIS);
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56 static void PULSE_CloseAudio(_THIS);
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57
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58 #ifdef SDL_AUDIO_DRIVER_PULSE_DYNAMIC
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59
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60 static const char *pulse_library = SDL_AUDIO_DRIVER_PULSE_DYNAMIC;
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61 static void *pulse_handle = NULL;
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62 static int pulse_loaded = 0;
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63
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64 static pa_simple* (*SDL_NAME(pa_simple_new))(
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65 const char *server,
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66 const char *name,
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67 pa_stream_direction_t dir,
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68 const char *dev,
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69 const char *stream_name,
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70 const pa_sample_spec *ss,
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71 const pa_channel_map *map,
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72 const pa_buffer_attr *attr,
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73 int *error
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74 );
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75 static void (*SDL_NAME(pa_simple_free))(pa_simple *s);
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76 static int (*SDL_NAME(pa_simple_drain))(pa_simple *s, int *error);
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77 static int (*SDL_NAME(pa_simple_write))(
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78 pa_simple *s,
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79 const void *data,
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80 size_t length,
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81 int *error
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82 );
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83 static pa_channel_map* (*SDL_NAME(pa_channel_map_init_auto))(
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84 pa_channel_map *m,
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85 unsigned channels,
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86 pa_channel_map_def_t def
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87 );
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88
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89
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90 static struct {
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91 const char *name;
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92 void **func;
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93 } pulse_functions[] = {
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94 { "pa_simple_new",
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95 (void **)&SDL_NAME(pa_simple_new) },
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96 { "pa_simple_free",
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97 (void **)&SDL_NAME(pa_simple_free) },
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98 { "pa_simple_drain",
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99 (void **)&SDL_NAME(pa_simple_drain) },
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100 { "pa_simple_write",
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101 (void **)&SDL_NAME(pa_simple_write) },
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102 { "pa_channel_map_init_auto",
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103 (void **)&SDL_NAME(pa_channel_map_init_auto) },
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104 };
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105
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106 static void UnloadPulseLibrary()
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107 {
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108 if ( pulse_loaded ) {
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109 SDL_UnloadObject(pulse_handle);
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110 pulse_handle = NULL;
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111 pulse_loaded = 0;
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112 }
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113 }
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114
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115 static int LoadPulseLibrary(void)
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116 {
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117 int i, retval = -1;
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118
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119 pulse_handle = SDL_LoadObject(pulse_library);
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120 if ( pulse_handle ) {
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121 pulse_loaded = 1;
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122 retval = 0;
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123 for ( i=0; i<SDL_arraysize(pulse_functions); ++i ) {
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124 *pulse_functions[i].func = SDL_LoadFunction(pulse_handle, pulse_functions[i].name);
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125 if ( !*pulse_functions[i].func ) {
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126 retval = -1;
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127 UnloadPulseLibrary();
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128 break;
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129 }
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130 }
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131 }
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132 return retval;
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133 }
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134
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135 #else
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136
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137 static void UnloadPulseLibrary()
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138 {
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139 return;
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140 }
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141
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142 static int LoadPulseLibrary(void)
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143 {
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144 return 0;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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145 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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diff changeset
146
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
147 #endif /* SDL_AUDIO_DRIVER_PULSE_DYNAMIC */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
148
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
149 /* Audio driver bootstrap functions */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
150
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
151 static int Audio_Available(void)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
152 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
153 pa_sample_spec paspec;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
154 pa_simple *connection;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
155 int available;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
156
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
157 available = 0;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
158 if ( LoadPulseLibrary() < 0 ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
159 return available;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
160 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
161
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
162 /* Connect with a dummy format. */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
163 paspec.format = PA_SAMPLE_U8;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
164 paspec.rate = 11025;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
165 paspec.channels = 1;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
166 connection = SDL_NAME(pa_simple_new)(
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
167 SDL_getenv("PASERVER"), /* server */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
168 "Test stream", /* application name */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
169 PA_STREAM_PLAYBACK, /* playback mode */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
170 SDL_getenv("PADEVICE"), /* device on the server */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
171 "Simple DirectMedia Layer", /* stream description */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
172 &paspec, /* sample format spec */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
173 NULL, /* channel map */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
174 NULL, /* buffering attributes */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
175 NULL /* error code */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
176 );
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
177 if ( connection != NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
178 available = 1;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
179 SDL_NAME(pa_simple_free)(connection);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
180 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
181
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
182 UnloadPulseLibrary();
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
183 return(available);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
184 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
185
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
186 static void Audio_DeleteDevice(SDL_AudioDevice *device)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
187 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
188 SDL_free(device->hidden);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
189 SDL_free(device);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
190 UnloadPulseLibrary();
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
191 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
192
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
193 static SDL_AudioDevice *Audio_CreateDevice(int devindex)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
194 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
195 SDL_AudioDevice *this;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
196
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
197 /* Initialize all variables that we clean on shutdown */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
198 LoadPulseLibrary();
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
199 this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
200 if ( this ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
201 SDL_memset(this, 0, (sizeof *this));
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
202 this->hidden = (struct SDL_PrivateAudioData *)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
203 SDL_malloc((sizeof *this->hidden));
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
204 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
205 if ( (this == NULL) || (this->hidden == NULL) ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
206 SDL_OutOfMemory();
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
207 if ( this ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
208 SDL_free(this);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
209 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
210 return(0);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
211 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
212 SDL_memset(this->hidden, 0, (sizeof *this->hidden));
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
213
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
214 /* Set the function pointers */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
215 this->OpenAudio = PULSE_OpenAudio;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
216 this->WaitAudio = PULSE_WaitAudio;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
217 this->PlayAudio = PULSE_PlayAudio;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
218 this->GetAudioBuf = PULSE_GetAudioBuf;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
219 this->CloseAudio = PULSE_CloseAudio;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
220
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
221 this->free = Audio_DeleteDevice;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
222
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
223 return this;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
224 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
225
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
226 AudioBootStrap PULSE_bootstrap = {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
227 PULSE_DRIVER_NAME, "PulseAudio",
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
228 Audio_Available, Audio_CreateDevice
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
229 };
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
230
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
231 /* This function waits until it is possible to write a full sound buffer */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
232 static void PULSE_WaitAudio(_THIS)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
233 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
234 /* Check to see if the thread-parent process is still alive */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
235 { static int cnt = 0;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
236 /* Note that this only works with thread implementations
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
237 that use a different process id for each thread.
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
238 */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
239 if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
240 if ( kill(parent, 0) < 0 ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
241 this->enabled = 0;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
242 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
243 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
244 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
245 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
246
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
247 static void PULSE_PlayAudio(_THIS)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
248 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
249 /* Write the audio data */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
250 if ( SDL_NAME(pa_simple_write)(stream, mixbuf, mixlen, NULL) != 0 )
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
251 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
252 this->enabled = 0;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
253 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
254 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
255
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
256 static Uint8 *PULSE_GetAudioBuf(_THIS)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
257 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
258 return(mixbuf);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
259 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
260
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
261 static void PULSE_CloseAudio(_THIS)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
262 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
263 if ( mixbuf != NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
264 SDL_FreeAudioMem(mixbuf);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
265 mixbuf = NULL;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
266 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
267 if ( stream != NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
268 SDL_NAME(pa_simple_drain)(stream, NULL);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
269 SDL_NAME(pa_simple_free)(stream);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
270 stream = NULL;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
271 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
272 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
273
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
274 /* Try to get the name of the program */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
275 static char *get_progname(void)
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
276 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
277 char *progname = NULL;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
278 #ifdef __LINUX__
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
279 FILE *fp;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
280 static char temp[BUFSIZ];
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
281
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
282 SDL_snprintf(temp, SDL_arraysize(temp), "/proc/%d/cmdline", getpid());
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
283 fp = fopen(temp, "r");
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
284 if ( fp != NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
285 if ( fgets(temp, sizeof(temp)-1, fp) ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
286 progname = SDL_strrchr(temp, '/');
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
287 if ( progname == NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
288 progname = temp;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
289 } else {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
290 progname = progname+1;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
291 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
292 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
293 fclose(fp);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
294 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
295 #endif
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
296 return(progname);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
297 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
298
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
299 static int PULSE_OpenAudio(_THIS, SDL_AudioSpec *spec)
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300 {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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301 Uint16 test_format;
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302 pa_sample_spec paspec;
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303 pa_buffer_attr paattr;
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304 pa_channel_map pacmap;
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305
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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306 paspec.format = PA_SAMPLE_INVALID;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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307 for ( test_format = SDL_FirstAudioFormat(spec->format); test_format; ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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308 switch ( test_format ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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309 case AUDIO_U8:
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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310 paspec.format = PA_SAMPLE_U8;
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311 break;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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312 case AUDIO_S16LSB:
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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313 paspec.format = PA_SAMPLE_S16LE;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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314 break;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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315 case AUDIO_S16MSB:
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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316 paspec.format = PA_SAMPLE_S16BE;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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317 break;
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318 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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319 if ( paspec.format != PA_SAMPLE_INVALID )
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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320 break;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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321 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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322 if (paspec.format == PA_SAMPLE_INVALID ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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323 SDL_SetError("Couldn't find any suitable audio formats");
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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324 return(-1);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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325 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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326 spec->format = test_format;
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327
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328 paspec.channels = spec->channels;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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329 paspec.rate = spec->freq;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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330
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331 /* Calculate the final parameters for this audio specification */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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332 SDL_CalculateAudioSpec(spec);
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333
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334 /* Allocate mixing buffer */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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335 mixlen = spec->size;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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336 mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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337 if ( mixbuf == NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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338 return(-1);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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339 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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340 SDL_memset(mixbuf, spec->silence, spec->size);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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341
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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342 /* Reduced prebuffering compared to the defaults. */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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343 paattr.tlength = mixlen;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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344 paattr.minreq = mixlen;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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345 paattr.fragsize = mixlen;
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346 paattr.prebuf = mixlen;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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347 paattr.maxlength = mixlen * 4;
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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348
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349 /* The SDL ALSA output hints us that we use Windows' channel mapping */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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350 /* http://bugzilla.libsdl.org/show_bug.cgi?id=110 */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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351 SDL_NAME(pa_channel_map_init_auto)(
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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352 &pacmap, spec->channels, PA_CHANNEL_MAP_WAVEEX);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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353
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354 /* Connect to the PulseAudio server */
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355 stream = SDL_NAME(pa_simple_new)(
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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356 SDL_getenv("PASERVER"), /* server */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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357 get_progname(), /* application name */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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358 PA_STREAM_PLAYBACK, /* playback mode */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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359 SDL_getenv("PADEVICE"), /* device on the server */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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360 "Simple DirectMedia Layer", /* stream description */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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361 &paspec, /* sample format spec */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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362 &pacmap, /* channel map */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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363 &paattr, /* buffering attributes */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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364 NULL /* error code */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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365 );
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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366 if ( stream == NULL ) {
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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367 PULSE_CloseAudio(this);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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368 SDL_SetError("Could not connect to PulseAudio");
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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369 return(-1);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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370 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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371
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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372 /* Get the parent process id (we're the parent of the audio thread) */
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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373 parent = getpid();
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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374
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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375 return(0);
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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376 }
42e83d81224b Committed PulseAudio driver. Thanks, Stephan!
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377